JB/T 10390-2002 Feasibility Design of Fieldbus Intelligent Instruments
Some standard content:
ICS 25.040.40
Machinery Industry Standard of the People's Republic of China
JB/F10390——2002
Reliability Design Methods
Kellablllty Design Methods
forfieldbus intelligence instrumentPublished on 2002-12-27
Implemented on 2003-04-0t
Published by the State Economic and Trade Commission of the People's Republic of ChinaForeword
EApplication
2 Normative reference documents
Terms and definitions
4 Reliability characteristics of intelligent instruments 4.2 Reliability index system of intelligent instruments
5 Reliability design
Technical measures for reliability design
5.2 Component selection and control...
Reliability prediction and allocation,
Derating calculation
Reliable circuit design
Fault analysis
Maintainability design,
Software reliability design
5.9 Other design methods...
6 Reliability design evaluation
Reliability 6.4 Requirements for evaluation content and requirements
6.5 Evaluation criteria
6.6 Evaluation materials
6.7 Evaluation report
Project A (informative appendix) Example of reliability prediction of intelligent instrument A.1 Functional network and reliability logic block diagram of intelligent instrument A.2 Mathematical model of flowmeter and functional unit B (informative appendix) Example of reliability distribution of intelligent meter++
Project (informative appendix) Example of fault analysis of intelligent instrument C.1 Reliability function distribution diagram of vortex flowmeter C.2 Release mode
Figure A! Intelligent special meter [. Original block diagram Figure A.2 Flow meter reliability diagram,
Figure A.3 Sensor reliability diagram
Figure A.4 Sensitive board reliability diagram
Figure A.5 Conversion board reliability diagram
Flow meter reliability classification diagram
JB/T 10390- 2002
B/110390--2002
1 Intelligent instrument reliability index
Table 2 Component stress analysis calculation table
Table 3 Reliability review personnel and job scope,
Table B.1 Reliability index allocation statistics from the whole machine to the functional unit Table B.2 Reliability index allocation statistics from the conversion board unit level to the component level Failure mode summary table.
Table C.2 FMEA analysis table for the vibration part,
The format and expression method of this standard are in accordance with the standard of GB/T1.1-2000. Appendix A, Appendix B and Appendix C of the technical standard are informative, and this standard is issued by the China Machinery Industry Federation: This standard is issued by the China Industrial Process Measurement and Control Standardization Technical Committee. The JB/Tf03902002
standard was drafted by Chongqing Industrial Automation Instrument Research Institute, and Shanghai Industrial Automation Instrument Research Institute, Shanghai Automation Instrument Co., Ltd., Beijing Far East Instrument Co., Ltd., and Chongqing Chuanjin General Factory Youshang Company participated in the drafting. The main drafters of the standard are: Zhi Huaiyi, Li Jiajia, Jian Yinxing, Shou Guoyun, Liu Yuxin, Liu Qin, and Bo Yanzhen. 1 Scope
Fieldbus intelligent instrument
Reliability design method
JB/T 10:90—2002
This standard specifies the reliability index system and reliability design, evaluation content, procedures and methods of field bus intelligent instruments (hereinafter referred to as simplified intelligent instruments) that comply with HART, TF, PROFTRIJS, LONWORKS and other protocols. This standard is aimed at the reliability design and evaluation of the intelligent instruments that comply with various protocols during the research and development process (including prototype design, detailed design, final design and equivalent stages). The design and evaluation of other instruments and components may also be used as reference. 2 Normative referenced documents
The clauses in the following documents become the terms of this standard through reference to this standard. All the application documents with an expired date, all the subsequent amendments (excluding the approved content) or revised versions are not applicable to this standard. However, the parties involved in the standard agreement will study whether the latest versions of these documents can be used. For all the application documents without an expired date, their recorded versions are applicable to this standard. Detectability, image definition
GJB7R28 Reliability design review
GHT7829 Fault tree analysis process
GJB1391 Fault mode, impact and hazard analysis GJB/Z299A Electronic equipment reliability prediction JB/T10380--2002 Fieldbus intelligent instrument reliability design evaluation MT: HF>RK217n US return rate joint class "Electrical equipment reliability prediction \3 Terms and definitions
GET3187 The following terms and definitions apply to this standard, 3.1
Reliability design review
Reliability review: The following is a brief description of the design review) to ensure that the design meets the reliability requirements, out The review organization composed of experts and experts from relevant parties not directly involved in the design (design, production, use, etc.) reviews the design plan of the product from the perspective of reliability according to the design and review form determined in advance.
Reliability index system
The reliability index should be able to quantitatively measure the reliability of smart instruments used under certain conditions in the process of their gradual improvement and meet the higher and higher requirements. This: The reliability index system is the reliability index system. 3.3
Software reliability
Software reliability refers to the ability of a component to provide available services according to the specified design specifications within the specified time and under the specified conditions. 3.4
Mean Time to Repair (MTIR)
Product The average value of the time required from finding a fault to restoring the function (i.e., the average of the sum of the time required for fault detection, fault location, fault diagnosis, and fault repair)
JB/T10390—2002
4 Reliability characteristic quantities and index system for intelligent instruments Reliability characteristic indicators can fully measure the reliability of products used under specified conditions. For intelligent meters, it is recommended to use HIHH (mean fault interval time) as the necessary reliability characteristic indicator for assessment. Reliability characteristics can also be selected according to the characteristics of the product. The provisions of reliability indicators are not static, but are obtained by analyzing and synthesizing theoretical analysis and actual application conditions: in the process of product development or maturity, new supplements are made. This index system is applicable to the selection of reliability indexes of intelligent instruments during product development and batch production, or when the contracting party makes reliability requirements for the product when signing the contract. 4.1 Temporary reliability characteristic quantity of the instrument
, mean time between failures MTBF (i.e. mean time between failures) MTBF=
the number of test samples specified in the qualitative test method for the product. The first is the number of times the product (or the sample of the test) is used or tested within the use or test time, b) reliability ()
the probability that the intelligent instrument can still meet the specified function when it is used for a period of time under the specified conditions - A
instrument failure rate.
c) Effectiveness A ()
The ability of the intelligent instrument to maintain the specified function under the specified conditions of use within a certain period of time A
Where:
The average repair time of the product.
MIHF +MTTR
4.2 Reliability index system of intelligent instrument
4.2.1 Temporary reliability index is recommended to be selected from Table 1 Table 1 Reliability index of intelligent instrument
Reliability characteristic quantity
Laboratory
-8000b
F-4000m
4m,2 The selection of index system should consider the following factors: u) Product technology maturity:
b) Product quality assurance conditions:
c) Application requirements.
5 Reliability Design
Indicator System
25×10°h
25x10%
50×10%h
1c0x tor6
In order to ensure the inherent reliability of the product, reliability analysis and prediction must be carried out, and reliability design technology must be used to carry out reliable increase design, 5.1. Technical measures for reliability design
a) Component selection and control:
b) Reliability prediction and allocation:
) Component derating design:
d) Driver circuit design:
e) Residual section design:
) Environmental resistance design:
g Fault analysis:
h.) Maintainability design:
1) Software reliability:
j) Fault-tolerant design and integrated design.
5.2 Component selection and control
JA/T10390—2002
Components are the basic units that make up a product. The reliability level of a product depends first on the reliability level of the components. Selection and control of components:
a) Select components with reliability indicators
Component procurement adopts the "three determination" principle, namely, determine the model and specification, determine the procurement manufacturer, and determine the procurement channel. bi
") Components should undergo "three inspections", namely, "human" inspection. Human warehouse inspection (check model specifications) and pre-use verification (check model specifications):
d) Components are 100% screened to eliminate some components with poor reliability. The aging screening takes electrical stress and thermal stress as the main stress sources.
5.3 Reliability prediction and allocation
5.3.1 Reliability prediction
Reliability prediction refers to the method of predicting the future working state of the product according to the components, energy, environment and their mutual relationship used in the product during the design stage.
Through reliability prediction, it is judged whether the design meets the required reliability value: find out the weak links in the design, analyze the most likely reasons that may cause product failure, etc., so as to incorporate it into the intelligent instrument reliability prediction process
Based on the functions of the product and the physical connections between the functional units, draw the energy of the product; according to the reliability relationship of each unit, draw the reliability logic diagram of the product, and establish the reliability mathematical model: determine the reliability of the components:
Predict the reliability of the parts, and then predict them step by step; "predict the reliability of the whole machine
b) Intelligent instrument reliability model and method
The reliability prediction of intelligent instrument adopts the component failure rate model: the imported components adopt M-HDBK-217E; the domestic components adopt GJB/Z2994. The reliability of the functional unit is calculated by using the reliability relationship between the functional units and the reliability model of the device, and the temporary reliability of the instrument is predicted. The energy vortex flow design of the Taiwan Agreement is predicted, see Appendix A:
Connect the hole devices composed of the above functional units according to the format of Table 2, calculate the failure rate of each unit, and then use the above method and mathematical model to calculate the reliability level of the energy vortex flow design. Table 2 Component Stress Analysis Calculation Table
Reliability Analysis
Special Loss
Stationary System
Stress Category
JB/T 10390—2002
Production equipment list
Environmental information:
5.3.2 Reliability allocation
Product name:
Lister:
Table 2 [Continued]
Functional unit name,
Date of creation:
Reliability index
Basic failure
Static system
Application failure
Reliability allocation is a method of reasonably allocating the specified product reliability index to each component in the product. It is a reverse process of reliability planning. Through reliability allocation, the design The designer should clearly know the reliability level of each component and the selected components, and then compare it with the expected results to find out the parts that are not considered enough in the design, and make improvements to the design to achieve high reliability of the product.
Reliability allocation methods mainly include:
a) Average allocation method:
b) Alins allocation method:
Substitution method:
d) Importance allocation method:
) Weighted allocation method:
f) State effectiveness allocation method, etc.
Reliability allocation of smart meters is recommended to adopt engineering weighted allocation method. This method considers various weighted factors such as complexity, technical level, maintenance factor, fatality, etc., and each factor is selected within the range of 1~-10 according to the specific situation of the product. The calculation formula is, n
MTBF-H
Wu:
Reliability index assigned to the unit:
Reliability target value:
Table to calculate the reliability of the unit
…·There are a total of weighting factors:
Indicates that there are a total of units. The value of the weighting factor is based on whether it is beneficial to improve the reliability level. The more beneficial it is to improve the reliability, the smaller the weighting factor is. The value range is between 1--10. The value of the weighting factor of the above four factors is: a
Complexity
It is determined according to the approximate number of components or meters required to form a functional unit: or it is evaluated according to the complexity of assembling these components: The simplest functional unit is rated as! , and the highly complex functional unit is rated as 10. Consider the technical level and maturity of the functional unit a few months ago: the level of the design or method with a low level is set as 63, the level of the most advanced design or method is set as 1
Criticality -1
Specially consider the impact of the functional unit failure on the product function, the level of the most critical unit is set as !, and the level of the least important functional unit is set as [0.
Repair factor
Accessibility, replaceability and maintenance difficulty are collectively referred to as maintenance factor: the level of the functional unit with good repairability is 1, and the level of the poor unit is 10:
Take the HF synergy intelligent run street micro benefit design as an example to distribute reliability, see Appendix, 5.4 Degradation design
JB/T 10390—2002
Degradation design is a design technology that makes components used in applications with lower than the specified value. For different types of components, the derating methods are different: reduce the power ratio of accessories, reduce the operating voltage of electrical appliances: keep the operating power consumption of semiconductor components within the rated power consumption: reduce the ambient temperature of integrated power stations, and use the load, etc.: There are several methods for derating design.
a) Reduce the applied stress.
In product design, the stress balance generally used is 0.3-0.5 of the rated stress. b) Select components with higher strength.
Selecting components with higher strength is the most practical method. 6.5 Reliable circuit design
The derating design of products includes simplified design, standard parts design: overstress protection design, etc. The reliability of products is a function of the complexity of products. Reducing complexity and simplifying circuit design can improve its reliability. The premise of simplified design is not to increase the stress on other components. Using circuits with verified and known reliability can improve the possibility of product design. Using standard electronic modules can reduce design and manufacturing time, which is conducive to reliability prediction and other work. Electronic components may sometimes break due to overstress and cause product failure. When designing, the transient stress resistance of some components should be considered.
5.6 Fault Analysis
Retrospective fault analysis should be performed in the detailed design stage of intelligent instruments. It is recommended to use the reliability analysis technology of Fault Mode and Effect Analysis (FMB) (C)A or Fault Tree Analysis (FTA).
FMB (C)A adopts the "bottom-up" reverse analysis method, starting from the product base level (components), and tracing the failure mode of each component until the product level to determine the impact of each failure mode on product performance, and find out the compensation and elimination methods: the specific analysis method can be found in GB1391. 5.8.1 The role of FMB (C)A analysis
Before performing reliability prediction, intelligent instruments should complete the above MMA analysis, which is a basic part of design. With the acquisition of more detailed design information, further expansion and improvement will be made to make the designed products more perfect. a) Find out the known storage mode of the equipment: b) Find out the cause and the cause of each storage mode: c) According to the probability of failure, find out the key failure mode: 1 Propose improvement measures for the problems found.
5.6.2 Analysis method
Take the energy-saving type measuring meter that complies with the FF protocol as an example for analysis, see Appendix C. 5.6.3FTA analysis
FTA analysis is also known as fault tree analysis, which takes the least likely fault state of the product as the fault analysis target, and then searches for all the factors that directly cause the fault, including hardware, components, environment and human factors, and forms a tree structure diagram of these factors according to their mutual relationships. The main function of FTA analysis is to predict and diagnose product failures, find out the weak links of the product, so as to take corresponding improvement measures in the design and achieve hierarchical optimization of product design. After the failure occurs, it is used to analyze the cause of the failure and locate the fault: FIA analysis procedure:
) Predictable event
In FA analysis: the event that is not expected is the "top event", and the cause of the failure is investigated from 1 to 2 until the component that can no longer be traced is the "bottom component", and the events in between are the "intermediate events". 5
JB/T 10390—2002
b) Analyze the "intermediate event" that leads to the occurrence of the above event, and then analyze the next level "intermediate event" that leads to the "intermediate event" until the "bottom event 1
) Analyze the relationship between the events, build an FTA diagram
, and apply the national standard GBT7829 according to the analysis.d) Propose design suggestions.
5.7 Maintainability design
In order to improve the effectiveness of intelligent instruments, it is necessary not only to carry out the design of inherent maintainability, but also to take the design measures of high maintainability. The maintainability design includes fault diagnosis when a fault occurs, the troubleshooting, replacement, and adjustment of faulty components, etc. The following qualitative requirements are put forward for the maintainability design of intelligent instruments:
a) Simplicity of structure:
b) The integrity of the installation of functional units or components c) Accessibility during seams;
d) Adjustability:
) Standardization, generalization and interchangeability:
) Easy disassembly and assembly:
g) Crystal detectability and easy calibration:
h) Safety of maintenance operations,
5.8 Software reliability design
Software reliability design methods adopt four types a) Error avoidance design is a design method that does not allow errors to occur or occur during the design process, and there must be methods to control and reduce the complexity of program points; methods to improve the accuracy of changes: methods to improve information communication: methods to quickly find and correct errors. 6) Error detection design refers to giving certain special procedures in the design. The function of the program can automatically check errors during operation. Error correction design refers to a design method that allows the program to self-correct errors and reduce the risk of errors during the design process. Fault-tolerant design refers to a special block of a subroutine in the design process that can enable the program to detect errors when an error has been triggered. Of course, it has a reliable operation and design method. The software reliability design method is more commonly used. The structured sequential design is its main points. It is a program design and module decision-making method from 1 to 2.
The program design method from 1 to 2 (abbreviated as the downward method) is used to improve the product design level. Start by decomposing the entire software into several independent modules and perform design description separately: decompose the modules into the next step: directly Until each final decomposed module can be written in a relatively simple and practical way, this method can achieve the design of the software, with clear control structure, good filterability, modifiability and reliability. The product software is decomposed into ten modules, each module is relatively independent (that is, the function is single and has only one entry): each module can be independently understood, simplified, tested, corrected and rectified, so that the effective development work is systematized. Features: The modules are relatively independent, which can effectively prevent the spread of errors between modules, thereby improving the reliability of the software. 5.9 Other design methods
With the continuous development and improvement of reliability engineering, various new design methods are constantly emerging. Such as environmental design, obstacle avoidance design technology, etc., can effectively improve the reliability of the product. Perfect design! With the increasing application of technology, it has been continuously improved and supplemented. 6 Reliability Design Review
New products of intelligent instruments should be subject to reliability design review at each stage of design, design finalization and production finalization: the review method can refer to GB/T7828.
6.1 The role of reliability design review
a) Improve the design quality and achieve the reliability target of intelligent meters. JH/10390—20D02
b? Reliability design review is not a step-by-step review for technical responsibility, but a supplement and supervision for its review.
5.2 Review objectives
4 Check the correctness of reliability design, such as reliability index, distribution, prediction, stress analysis of key components, environmental requirements and failure mode and its impact analysis, etc.
h) Evaluate whether the design meets the requirements of the design method and the American standard for reliability. ) Raise the weak links in product design: d! Propose suggestions for improving reliability and maintainability: , Review the spare parts, tools and maintainability required for the instrument in use, ) Review the simplified structure and manufacturing process of the intelligent instrument, and reduce the performance of the finished product. 6.3 Review Organization
6,3.1 Composition of Reviewers
Quality Review, Review Period Review The review team shall be composed of experts with relevant experience in the design of the intelligent instrument, and shall have at least 5 people. There shall be a team leader and a secretary: about one person in charge of the design project or the next higher level designer. The secretary shall assist the team leader in organizing and planning the review. The secretary shall generally be a representative of the quality assurance department (see Table 3 for members of the review team and their qualifications. 5-9, person
Design (product)
No design (company)
Lechuang control engineer
Possible process institute
Standardization engineering department
|Production Technologist
Sales Engineer
Test Process
6.3.2 Tasks of the Review Group
Prepare plans, hold pre-review work and review meetings, prepare review approvals, and prepare equipment performance reports
Assist the team leader in organizing and planning the review, organize review activities according to the review process*Design: Summarize relevant materials and complete the design report; analyze data: and prove the correctness of the decision-making based on the design and test data; Review the performance of the design: The product integration meets all requirements of the technical agreement and technical services, and is related to the review opinion. Check the design, verify whether the quality control is carried out under the abandoned items, and ensure the effectiveness of the inspection and control. Evaluate the reliability design plan, reliability design report, failure analysis of key parts and the instructions taken to ensure that the reliability indicators meet the requirements of the technical agreement or technical task book, and evaluate whether the design drawings and documents meet the standards and relevant regulations. Whether it is economical and suitable for peripherals. The general manager shall make comments on the processing and production report before the product is put on the market, and make technical evaluations on the product performance before it is put on the market, and ensure that the parts and procedures meet the requirements of quality control and long-term production. The correctness of the selection and use of the meter and its test instruments shall be checked. a) The design results shall be analyzed and checked separately by profession, and relevant problems shall be discussed collectively. b) Clear evaluation opinions shall be given on whether the design meets the requirements of the relevant standards and methods, and specific suggestions for improving the design. c) The evaluation items shall be scored according to the scoring criteria. d) After the evaluation, a review report shall be written. Review report format and requirements mT103892002) 6.4 Review content requirements
The design review of energy-saving instruments can be combined with its technical performance evaluation. The content and requirements of the feasibility design review of each stage of the intelligent instrument can be found in 5.1 of B10389-2002. 6.5 Review Procedure
A complete design review includes four stages: preparation, pre-review, convening a formal review meeting and follow-up management: JB/T10390-2002
And the content and requirements can be found in 5.2 of JB/T10389-2002. 6.6 Review Materials
Before the feasibility design review, the design team shall submit documents including the following contents: design basis, feasibility objectives and the level achieved: main features of the design and improvements Note:
In this stage, the feasibility analysis and countermeasures of the important issues and links shall be completed using the test results: d
Submit the feasibility technical report, test data and related original data for review. 6.7 Review report
The feasibility design review report should include:
List of members and division of labor of Shenzhen Design Committee;
Provide a list of materials for review;
Design goals and the level to be achieved:
d) Review conclusion:
Memorandum of different information:
The main leader makes the review decision.7 Review Report
The feasibility design review report should include:
List of members and division of labor;
List of materials for review;
Design goals and the level of achievement;
d) Review conclusion:
Memorandum of different information:
Review decision by the main leader.7 Review Report
The feasibility design review report should include:
List of members and division of labor;
List of materials for review;
Design goals and the level of achievement:
d) Review conclusion:
Memorandum of different information:
Review decision by the main leader.7 Review Report
The feasibility design review report should include:
List of members and division of labor;
List of materials for review;
Design goals and the level of achievement;
d) Review conclusion:
Memorandum of different information:
Review decision by the main leader.7 Review Report
The feasibility design review report should include:
List of members and division of labor;
List of materials for review;
Design goals and the level of achievement;
d) Review conclusion:
Memorandum of different information:
Review decision by the main leader.7 Review Report
The feasibility design review report should include:
List of members and division of labor;
List of materials for review;
Design goals and the level of achievement;
d) Review conclusion:
Memorandum of different information:
Review decision by the main leader.7 Review Report
The feasibility design review report should include:
List of members and division of labor;
List of materials for review;
Design goals and the level of achievement;
d) Review conclusion:
Memorandum of different information:
Review decision by the main leader.7 Maintainability design
In order to improve the effectiveness of smart meters, it is necessary not only to carry out the design that improves inherent maintainability, but also to take design measures to improve loss compensation. The maintainability design includes fault diagnosis when a fault occurs, the ability to repair and replace faulty parts, magnetic adjustment, etc. The maintainability design of smart meters puts forward the following qualitative requirements:
a) Simplicity of structure:
b) Integrity of installation of functional units or componentsc) Accessibility during installation;
d) Adjustability:
) Standardization, Universality and interchangeability:
) Easy disassembly and assembly:
g) Crystal detectability and easy calibration:
h) Safety of maintenance operations,
5.8 Software reliability design
Software reliability design adopts four types of design methods: a) Error avoidance design is a design method that ensures that no errors occur or are likely to occur during the design process, and there must be methods to control and reduce the complexity of program points; methods to improve transformation accuracy: methods to improve information communication: methods to quickly find and correct transformation errors. 6) Error checking design refers to a design method in which a program is given certain special functions in the design, which can enable the program to automatically check errors during operation. Error correction design refers to a design method in which a program is given a certain degree of self-correction of errors and a reduction in the risk of errors during the design process. Fault-tolerant design refers to a design method in which a certain special block of a subroutine is added in the design process to enable the program to automatically check errors during operation. When an error is triggered, the program can automatically check errors during operation. The software reliability design method is more commonly used. Its main points are program design and model support from 1.
A programming method from 1 to 2 (referred to as the downward method? To improve the level of product design, start by decomposing the entire software into several independent modules, and then further decompose them: Decompose the modules one step at a time: Until each final decomposed module can be written in a relatively simple and practical way. With this method, the design structure is clear, with good filterability, modifiability and reliability. The product software is decomposed into 10 modules, each of which is relatively independent (that is, the function unit has only one entry): Each module can be independently understood, simplified, tested, corrected and rectified, making the development work more systematic. Features: The modules are relatively independent, which can effectively prevent errors from spreading between modules. 5.9 Other design methods
With the continuous development and improvement of reliability engineering, various new design methods continue to emerge. For example, environmental design, obstacle avoidance design technology, etc., can effectively improve the reliability of products. Perfect design! With the increasing application of technology, it has played a role in continuous improvement and supplementation. 6 Reliability design review bzxz.net
New products of intelligent instruments should be subject to reliability design review at each stage of design, design finalization and production finalization: the review method can refer to GB/T7828.
6.1 The role of reliability design review
a) Improve the design quality and achieve the reliability target of intelligent meters. JH/10390—20D02
b? Reliability design review is not a step-by-step review for technical responsibility, but a supplement and supervision for its review.
5.2 Review Objectives
4 Check the correctness of reliability design, such as reliability index, distribution, prediction, stress analysis of key components, environmental requirements and failure mode and its impact analysis, etc.,
h) Evaluate whether the design meets the requirements of the design method and the US standard for reliability. d) Propose the weak links in product design: d! Propose suggestions for improving reliability and maintainability: d) Review the spare parts, tools and maintainability required for the replacement instrument in use, d) Review the simplified structure and manufacturing process of the intelligent instrument, and reduce the energy consumption of the finished product. 6.3 Review Organization
6,3.1 Composition of Reviewers
Quality review, review the main work of the month, the competent department of the undertaking unit is responsible for the review, and the review team shall be a group of experts with relevant experience in the design of the intelligent instrument. There shall be a team leader and a secretary: about one person in charge of the design project or the next higher level designer. The secretary shall assist the team leader in organizing and planning the review. The secretary shall generally be a representative of the quality assurance department (see Table 3 for members of the review team and their qualifications. 5-9, person
Design (product)
No design (company)
Lechuang control engineer
Possible process institute
Standardization engineering department
|Production Technologist
Sales Engineer
Test Process
6.3.2 Tasks of the Review Group
Prepare plans, hold pre-review work and review meetings, prepare review approvals, and prepare equipment performance reports
Assist the team leader in organizing and planning the review, organize review activities according to the review process*Design: Summarize relevant materials and complete the design report; analyze data: and prove the correctness of the decision-making based on the design and test data; Review the performance of the design: The product integration meets all requirements of the technical agreement and technical services, and is related to the review opinion. Check the design, verify whether the quality control is carried out under the abandoned items, and ensure the effectiveness of the inspection and control. Evaluate the reliability design plan, reliability design report, failure analysis of key parts and the instructions taken to ensure that the reliability indicators meet the requirements of the technical agreement or technical task book, and evaluate whether the design drawings and documents meet the standards and relevant regulations. Whether it is economical and suitable for peripherals. The general manager shall make comments on the processing and production report before the product is put on the market, and make technical evaluations on the product performance before it is put on the market, and ensure that the parts and procedures meet the requirements of quality control and long-term production. The correctness of the selection and use of the meter and its test instruments shall be checked. a) The design results shall be analyzed and checked separately by profession, and relevant problems shall be discussed collectively. b) Clear evaluation opinions shall be given on whether the design meets the requirements of the relevant standards and methods, and specific suggestions for improving the design. c) The evaluation items shall be scored according to the scoring criteria. d) After the evaluation, a review report shall be written. Review report format and requirements mT103892002) 6.4 Review content requirements
The design review of energy-saving instruments can be combined with its technical performance evaluation. The content and requirements of the feasibility design review of each stage of the intelligent instrument can be found in 5.1 of B10389-2002. 6.5 Review Procedure
A complete design review includes four stages: preparation, pre-review, convening a formal review meeting and follow-up management: JB/T10390-2002
And the content and requirements can be found in 5.2 of JB/T10389-2002. 6.6 Review Materials
Before the feasibility design review, the design team shall submit documents including the following contents: design basis, feasibility objectives and the level achieved: main features of the design and improvements Note:
In this stage, the feasibility analysis and countermeasures of the important issues and links shall be completed using the test results: d
Submit the feasibility technical report, test data and related original data for review. 6.7 Review report
The feasibility design review report should include:
List of members and division of labor of Shenzhen Design Committee;
Provide a list of materials for review;
Design goals and the level to be achieved:
d) Review conclusion:
Memorandum of different information:
The main leader makes the review decision.7 Maintainability design
In order to improve the effectiveness of smart meters, it is necessary not only to carry out the design that improves inherent maintainability, but also to take design measures to improve loss compensation. The maintainability design includes fault diagnosis when a fault occurs, the ability to repair and replace faulty parts, magnetic adjustment, etc. The maintainability design of smart meters puts forward the following qualitative requirements:
a) Simplicity of structure:
b) Integrity of installation of functional units or componentsc) Accessibility during installation;
d) Adjustability:
) Standardization, Universality and interchangeability:
) Easy disassembly and assembly:
g) Crystal detectability and easy calibration:
h) Safety of maintenance operations,
5.8 Software reliability design
Software reliability design adopts four types of design methods: a) Error avoidance design is a design method that ensures that no errors occur or are likely to occur during the design process, and there must be methods to control and reduce the complexity of program points; methods to improve transformation accuracy: methods to improve information communication: methods to quickly find and correct transformation errors. 6) Error checking design refers to a design method in which a program is given certain special functions in the design, which can enable the program to automatically check errors during operation. Error correction design refers to a design method in which a program is given a certain degree of self-correction of errors and a reduction in the risk of errors during the design process. Fault-tolerant design refers to a design method in which a certain special block of a subroutine is added in the design process to enable the program to automatically check errors during operation. When an error is triggered, the program can automatically check errors during operation. The software reliability design method is more commonly used. Its main points are program design and model support from 1.
A programming method from 1 to 2 (referred to as the downward method? To improve the level of product design, start by decomposing the entire software into several independent modules, and then further decompose them: Decompose the modules one step at a time: Until each final decomposed module can be written in a relatively simple and practical way. With this method, the design structure is clear, with good filterability, modifiability and reliability. The product software is decomposed into 10 modules, each of which is relatively independent (that is, the function unit has only one entry): Each module can be independently understood, simplified, tested, corrected and rectified, making the development work more systematic. Features: The modules are relatively independent, which can effectively prevent errors from spreading between modules. 5.9 Other design methods
With the continuous development and improvement of reliability engineering, various new design methods continue to emerge. For example, environmental design, obstacle avoidance design technology, etc., can effectively improve the reliability of products. Perfect design! With the increasing application of technology, it has played a role in continuous improvement and supplementation. 6 Reliability design review
New products of intelligent instruments should be subject to reliability design review at each stage of design, design finalization and production finalization: the review method can refer to GB/T7828.
6.1 The role of reliability design review
a) Improve the design quality and achieve the reliability target of intelligent meters. JH/10390—20D02
b? Reliability design review is not a step-by-step review for technical responsibility, but a supplement and supervision for its review.
5.2 Review Objectives
4 Check the correctness of reliability design, such as reliability index, distribution, prediction, stress analysis of key components, environmental requirements and failure mode and its impact analysis, etc.,
h) Evaluate whether the design meets the requirements of the design method and the US standard for reliability. d) Propose the weak links in product design: d! Propose suggestions for improving reliability and maintainability: d) Review the spare parts, tools and maintainability required for the replacement instrument in use, d) Review the simplified structure and manufacturing process of the intelligent instrument, and reduce the energy consumption of the finished product. 6.3 Review Organization
6,3.1 Composition of Reviewers
Quality review, review the main work of the month, the competent department of the undertaking unit is responsible for the review, and the review team shall be a group of experts with relevant experience in the design of the intelligent instrument. There shall be a team leader and a secretary: about one person in charge of the design project or the next higher level designer. The secretary shall assist the team leader in organizing and planning the review. The secretary shall generally be a representative of the quality assurance department (see Table 3 for members of the review team and their qualifications. 5-9, person
Design (product)
No design (company)
Lechuang control engineer
Possible process institute
Standardization engineering department
|Production Technologist
Sales Engineer
Test Process
6.3.2 Tasks of the Review Group
Prepare plans, hold pre-review work and review meetings, prepare review approvals, and prepare equipment performance reports
Assist the team leader in organizing and planning the review, organize review activities according to the review process*Design: Summarize relevant materials and complete the design report; analyze data: and prove the correctness of the decision-making based on the design and test data; Review the performance of the design: The product integration meets all requirements of the technical agreement and technical services, and is related to the review opinion. Check the design, verify whether the quality control is carried out under the abandoned items, and ensure the effectiveness of the inspection and control. Evaluate the reliability design plan, reliability design report, failure analysis of key parts and the instructions taken to ensure that the reliability indicators meet the requirements of the technical agreement or technical task book, and evaluate whether the design drawings and documents meet the standards and relevant regulations. Whether it is economical and suitable for peripherals. The general manager shall make comments on the processing and production report before the product is put on the market, and make technical evaluations on the product performance before it is put on the market, and ensure that the parts and procedures meet the requirements of quality control and long-term production. The correctness of the selection and use of the meter and its test instruments shall be checked. a) The design results shall be analyzed and checked separately by profession, and relevant problems shall be discussed collectively. b) Clear evaluation opinions shall be given on whether the design meets the requirements of the relevant standards and methods, and specific suggestions for improving the design. c) The evaluation items shall be scored according to the scoring criteria. d) After the evaluation, a review report shall be written. Review report format and requirements mT103892002) 6.4 Review content requirements
The design review of energy-saving instruments can be combined with its technical performance evaluation. The content and requirements of the feasibility design review of each stage of the intelligent instrument can be found in 5.1 of B10389-2002. 6.5 Review Procedure
A complete design review includes four stages: preparation, pre-review, convening a formal review meeting and follow-up management: JB/T10390-2002
And the content and requirements can be found in 5.2 of JB/T10389-2002. 6.6 Review Materials
Before the feasibility design review, the design team shall submit documents including the following contents: design basis, feasibility objectives and the level achieved: main features of the design and improvements Note:
In this stage, the feasibility analysis and countermeasures of the important issues and links shall be completed using the test results: d
Submit the feasibility technical report, test data and related original data for review. 6.7 Review report
The feasibility design review report should include:
List of members and division of labor of Shenzhen Design Committee;
Provide a list of materials for review;
Design goals and the level to be achieved:
d) Review conclusion:
Memorandum of different information:
The main leader makes the review decision.To the next step of programming and model combination.
A programming method from 1 to 2 (abbreviated as the downward method? To improve the level of product design, start by decomposing the entire software into several independent modules, and then further decompose them: Decompose the modules one by one: Until each final decomposed module can be written in a relatively simple and practical way. By using this method to achieve the design, the control structure is clear, with good filterability, modifiability and reliability. Decompose the product software into 10 modules, each of which is relatively independent (that is, the function unit has only one entry): Each module can be independently understood, simplified, tested, modified and rectified, so that the development work can be systematized. Features: The modules are relatively independent, which can effectively prevent errors from spreading between modules. 5.9 Other design methods
With the continuous development and improvement of reliability engineering, various new design methods continue to emerge. For example, environmental design, obstacle avoidance design technology, etc., can effectively improve the reliability of products. Perfect design! With the increasing application of technology, it has played a role in continuous improvement and supplementation. 6 Reliability design review
New products of intelligent instruments should be subject to reliability design review at each stage of design, design finalization and production finalization: the review method can refer to GB/T7828.
6.1 The role of reliability design review
a) Improve the design quality and achieve the reliability target of intelligent meters. JH/10390—20D02
b? Reliability design review is not a step-by-step review for technical responsibility, but a supplement and supervision for its review.
5.2 Review Objectives
4 Check the correctness of reliability design, such as reliability index, distribution, prediction, stress analysis of key components, environmental requirements and failure mode and its impact analysis, etc.,
h) Evaluate whether the design meets the requirements of the design method and the US standard for reliability. d) Propose the weak links in product design: d! Propose suggestions for improving reliability and maintainability: d) Review the spare parts, tools and maintainability required for the replacement instrument in use, d) Review the simplified structure and manufacturing process of the intelligent instrument, and reduce the energy consumption of the finished product. 6.3 Review Organization
6,3.1 Composition of Reviewers
Quality review, review the main work of the month, the competent department of the undertaking unit is responsible for the review, and the review team shall be a group of experts with relevant experience in the design of the intelligent instrument. There shall be a team leader and a secretary: about one person in charge of the design project or the next higher level designer. The secretary shall assist the team leader in organizing and planning the review. The secretary shall generally be a representative of the quality assurance department (see Table 3 for members of the review team and their qualifications. 5-9, person
Design (product)
No design (company)
Lechuang control engineer
Possible process institute
Standardization engineering department
|Production Technologist
Sales Engineer
Test Process
6.3.2 Tasks of the Review Group
Prepare plans, hold pre-review work and review meetings, prepare review approvals, and prepare equipment performance reports
Assist the team leader in organizing and planning the review, organize review activities according to the review process*Design: Summarize relevant materials and complete the design report; analyze data: and prove the correctness of the decision-making based on the design and test data; Review the performance of the design: The product integration meets all requirements of the technical agreement and technical services, and is related to the review opinion. Check the design, verify whether the quality control is carried out under the abandoned items, and ensure the effectiveness of the inspection and control. Evaluate the reliability design plan, reliability design report, failure analysis of key parts and the instructions taken to ensure that the reliability indicators meet the requirements of the technical agreement or technical task book, and evaluate whether the design drawings and documents meet the standards and relevant regulations. Whether it is economical and suitable for peripherals. The general manager shall make comments on the processing and production report before the product is put on the market, and make technical evaluations on the product performance before it is put on the market, and ensure that the parts and procedures meet the requirements of quality control and long-term production. The correctness of the selection and use of the meter and its test instruments shall be checked. a) The design results shall be analyzed and checked separately by profession, and relevant problems shall be discussed collectively. b) Clear evaluation opinions shall be given on whether the design meets the requirements of the relevant standards and methods, and specific suggestions for improving the design. c) The evaluation items shall be scored according to the scoring criteria. d) After the evaluation, a review report shall be written. Review report format and requirements mT103892002) 6.4 Review content requirements
The design review of energy-saving instruments can be combined with its technical performance evaluation. The content and requirements of the feasibility design review of each stage of the intelligent instrument can be found in 5.1 of B10389-2002. 6.5 Review Procedure
A complete design review includes four stages: preparation, pre-review, convening a formal review meeting and follow-up management: JB/T10390-2002
And the content and requirements can be found in 5.2 of JB/T10389-2002. 6.6 Review Materials
Before the feasibility design review, the design team shall submit documents including the following contents: design basis, feasibility objectives and the level achieved: main features of the design and improvements Note:
In this stage, the feasibility analysis and countermeasures of the important issues and links shall be completed using the test results: d
Submit the feasibility technical report, test data and related original data for review. 6.7 Review report
The feasibility design review report should include:
List of members and division of labor of Shenzhen Design Committee;
Provide a list of materials for review;
Design goals and the level to be achieved:
d) Review conclusion:
Memorandum of different information:
The main leader makes the review decision.To the next step of programming and model combination.
A programming method from 1 to 2 (abbreviated as the downward method? To improve the level of product design, start by decomposing the entire software into several independent modules, and then further decompose them: Decompose the modules one by one: Until each final decomposed module can be written in a relatively simple and practical way. By using this method to achieve the design, the control structure is clear, with good filterability, modifiability and reliability. Decompose the product software into 10 modules, each of which is relatively independent (that is, the function unit has only one entry): Each module can be independently understood, simplified, tested, modified and rectified, so that the development work can be systematized. Features: The modules are relatively independent, which can effectively prevent errors from spreading between modules. 5.9 Other design methods
With the continuous development and improvement of reliability engineering, various new design methods continue to emerge. For example, environmental design, obstacle avoidance design technology, etc., can effectively improve the reliability of products. Perfect design! With the increasing application of technology, it has played a role in continuous improvement and supplementation. 6 Reliability design review
New products of intelligent instruments should be subject to reliability design review at each stage of design, design finalization and production finalization: the review method can refer to GB/T7828.
6.1 The role of reliability design review
a) Improve the design quality and achieve the reliability target of intelligent meters. JH/10390—20D02
b? Reliability design review is not a step-by-step review for technical responsibility, but a supplement and supervision for its review.
5.2 Review Objectives
4 Check the correctness of reliability design, such as reliability index, distribution, prediction, stress analysis of key components, environmental requirements and failure mode and its impact analysis, etc.,
h) Evaluate whether the design meets the requirements of the design method and the US standard for reliability. d) Propose the weak links in product design: d! Propose suggestions for improving reliability and maintainability: d) Review the spare parts, tools and maintainability required for the replacement instrument in use, d) Review the simplified structure and manufacturing process of the intelligent instrument, and reduce the energy consumption of the finished product. 6.3 Review Organization
6,3.1 Composition of Reviewers
Quality review, review the main work of the month, the competent department of the undertaking unit is responsible for the review, and the review team shall be a group of experts with relevant experience in the design of the intelligent instrument. There shall be a team leader and a secretary: about one person in charge of the design project or the next higher level designer. The secretary shall assist the team leader in organizing and planning the review. The secretary shall generally be a representative of the quality assurance department (see Table 3 for members of the review team and their qualifications. 5-9, person
Design (product)
No design (company)
Lechuang control engineer
Possible process institute
Standardization engineering department
|Production Technologist
Sales Engineer
Test Process
6.3.2 Tasks of the Review Group
Prepare plans, hold pre-review work and review meetings, prepare review approvals, and prepare equipment performance reports
Assist the team leader in organizing and planning the review, organize review activities according to the review process*Design: Summarize relevant materials and complete the design report; analyze data: and prove the correctness of the decision-making based on the design and test data; Review the performance of the design: The product integration meets all requirements of the technical agreement and technical services, and is related to the review opinion. Check the design, verify whether the quality control is carried out under the abandoned items, and ensure the effectiveness of the inspection and control. Evaluate the reliability design plan, reliability design report, failure analysis of key parts and the instructions taken to ensure that the reliability indicators meet the requirements of the technical agreement or technical task book, and evaluate whether the design drawings and documents meet the standards and relevant regulations. Whether it is economical and suitable for peripherals. The general manager shall make comments on the processing and production report before the product is put on the market, and make technical evaluations on the product performance before it is put on the market, and ensure that the parts and procedures meet the requirements of quality control and long-term production. The correctness of the selection and use of the meter and its test instruments shall be checked. a) The design results shall be analyzed and checked separately by profession, and relevant problems shall be discussed collectively. b) Clear evaluation opinions shall be given on whether the design meets the requirements of the relevant standards and methods, and specific suggestions for improving the design. c) The evaluation items shall be scored according to the scoring criteria. d) After the evaluation, a review report shall be written. Review report format and requirements mT103892002) 6.4 Review content requirements
The design review of energy-saving instruments can be combined with its technical performance evaluation. The content and requirements of the feasibility design review of each stage of the intelligent instrument can be found in 5.1 of B10389-2002. 6.5 Review Procedure
A complete design review includes four stages: preparation, pre-review, convening a formal review meeting and follow-up management: JB/T10390-2002
And the content and requirements can be found in 5.2 of JB/T10389-2002. 6.6 Review Materials
Before the feasibility design review, the design team shall submit documents including the following contents: design basis, feasibility objectives and the level achieved: main features of the design and improvements Note:
In this stage, the feasibility analysis and countermeasures of the important issues and links shall be completed using the test results: d
Submit the feasibility technical report, test data and related original data for review. 6.7 Review report
The feasibility design review report should include:
List of members and division of labor of Shenzhen Design Committee;
Provide a list of materials for review;
Design goals and the level to be achieved:
d) Review conclusion:
Memorandum of different information:
The main leader makes the review decision.2. Tasks of the review group
Prepare a plan, hold pre-review work and review meetings, issue review reports
Assist the team leader to prepare the organization and plan of the review, organize review activities according to the review process: Summarize the design report with relevant materials and complete the design report: and prove the correctness of the reliability decision-making based on the design and test data; Review the design performance: The product integration meets the technical agreement and technical requirements, and issues review opinions; Check the design, verify whether the quality control is carried out under the abandoned items, and ensure the effectiveness of the inspection, control, etc.
Evaluate the reliability design plan, reliability design report and failure analysis of key parts and the instructions taken, to ensure that the reliability indicators meet the requirements of the technical agreement or technical task book, and whether the design drawings and documents meet the standards and relevant regulations; and also evaluate whether the design is satisfactory! Whether it can be processed economically and reasonably, give comments on the product before it can be sold, ensure that the parts and processes meet the requirements of quality control and production long-term
Check the correctness of the selection and use of the meter and its test instruments. a) Analyze and check the design results according to the profession, and discuss the relevant issues. b) Give clear evaluation opinions on whether the design meets the requirements of the relevant standards and methods, and make specific suggestions for improving the design. c) Score the evaluation items according to the scoring criteria. d) Write an evaluation report after the evaluation. Evaluation report format and requirements mT103892002)6.4 Evaluation content requirements
The design review of energy-saving instruments can be combined with its technical performance evaluation. The content and requirements of the feasibility design review of each stage of the intelligent instrument can be found in 5.1 of B10389-2002. 6.5 Review Procedure
A complete design review includes four stages: preparation, pre-review, convening a formal review meeting and follow-up management: JB/T10390-2002
And the content and requirements can be found in 5.2 of JB/T10389-2002. 6.6 Review Materials
Before the feasibility design review, the design team shall submit documents including the following contents: design basis, feasibility objectives and the level achieved: main features of the design and improvements Note:
In this stage, the feasibility analysis and countermeasures of the important issues and links shall be completed using the test results: d
Submit
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