This standard refers to the relevant provisions of the national standard for electronic digital calipers and determines the technical parameters of digital display units according to the working principle of the capacitive bar linear displacement measurement system. This standard specifies the terminology, type, technical requirements, inspection rules, marking and packaging of digital display units for capacitive bar linear displacement measurement systems with a resolution of 0.01mm. This standard is applicable to digital display units for capacitive bar linear displacement measurement systems with a capacitive bar pitch of 5.08mm and a display range of -999.99 to 999.99mm or -9999.99 to 9999.99mm. JB/T 8371-1996 Digital Display Unit for Capacitive Bar Linear Displacement Measurement System 0.01mm JB/T8371-1996 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
.IB/T8371—1996
Capacitor Barrier Displacement Measurement System
Digital Display Unit
1996-04-22 Issued
1996-07-01 Implementation
Ministry of Machinery Industry of the People's Republic of China
JH/T8371—1996
Technical Standard of the People's Republic of China
Digital Display Unit Technical Specifications According to the relevant provisions of this standard, the following technical specifications of the digital display unit are developed based on the working principle of the barrier displacement measurement system.
Digital display unit is an electronic component, so the test procedure refers to the standard of this standard for electrical and electronic products. This standard is applicable to digital display units with a pitch of 5.03mm, but for digital display units that cannot meet the various technical requirements of this standard, please refer to the detailed test procedures. Appendix A of the standard is the appendix of the standard. It specifies the inspection method of the digital display unit. This standard has been in effect since January 1, 1996. This standard was proposed and managed by the National Technical Committee for Standardization of Measuring Instruments. This standard was initiated by the National Microcomputer Application Technology Research Institute, the 11th Institute of the General Office of Aerospace Industry, and the Shanghai Measuring Instrument Factory. The drafters of the standard are: Tu Xunchun, Hua Haian, Jiang Rui: 1 Scope
Machinery Industry Standard of the People's Republic of China
Capacitive Barrier Displacement Measurement System
Digital Display Unit 0.01mm
JB/T 8371-1996
This standard specifies the terminology, type, inspection rules, instructions and packaging of the digital display unit with a rate of U, and the position of the digital display unit according to this requirement.
This standard is used for the machine section with a value of 5.8m and a display range of 99.m or -9~! m Capacitive load cell load-controlled displacement measurement system pressure recording unit 2 Reference standards
The following standards contain clauses that have become the standard clauses through reference in this document. This standard is published, the indicated provisions are valid, and all will be revised before. The parties using this standard should use the latest version of the listed standard instead. 692423.332
G3 2423. 557
GB 2423.1J-:3?
G3 2423.22- 87
2828-37
GP2829-87
3 Definition
3.! Product unit
Electric! Electronic products complete vehicle heat reduction test regulations (A constant flow heat test method) electronic products out of the environment test density test E, impact test method application electronic products basic environmental test tower test fee test F: vibration (string) test method application electronic products basic environmental test procedures test V: temperature change test point to reach batch inspection counting piece process Ning this single selection table (suitable for application manual continuous inspection) within week pregnancy inspection plan paste burden selection different characters and oil model table (suitable for electrical production code registration morality inspection) by large-scale circuit, girl and energy display and other points of the group pole, 3.2 customer period || tt || mountain master world tree composed of a group of electric running type release sensor case, 3. 3
The design of the capacitive displacement sensor is that the bars are matched with the auxiliary bars in the same distance, and the total length of the self-measurement system can measure the pressure drop.
The problem of installing a torsion displacement sensor is that the bars are respectively loaded with dynamic voltage signals with different phases but with cumulative changes. The spacing between the bars is determined by the current source of the system: 3. The capacitive finger joint porridge
the auxiliary bar reaches the total pressure stop signal on each cycle or the corresponding upper bar spacing. 3.6 Limit moving speed
The digital recording unit is used to measure the maximum movement speed under the normal working conditions of the measuring system. 3.7 The capacitive barrier measurement is a system with a sparse
self-measurement of displacement. The digital display unit and the assembly are all reversed and the displacement measurement is carried out. The Ministry of Industry and Commerce approved it in 199622
1996 U7-01 implementationwww.bzxz.net
4 type structure
Basic structure
IB/T 83711996
Typical metal screen digital display unit structure see Figure 1
1.-_ a. a
L,5. ±u. 1
Mounting hole
Telephone
=6W=W=W.=-5mu
Back view》
Figure 1 unit
4.2 Other fault-tolerant measurement system digital display unit type structure size +, and to have the group effect W, according to the requirements of the soldiers to confirm the unit, 5 technical requirements
5.1 Work case
5.1.1 Temperature method
Above the trap: heart-10
Begin to use, 23--: 70.
5. 1. 2 Relative humidity
Working level: not less than 82%RH,
5.1.3T working voltage: 1.45~1.60V
Alarm voltage: not more than 1.46V:
Power supply voltage sensitive wave: 4 not more than 0.0155V
5.1.4 Maximum positive strength
B6~1c6kPa.
3.2 External requirements
1B/T 8371
The external surface of the digital display unit should be half-smooth and clean; the indicator should have no marks, full liquid, plastic lines and other phenomena; the function symbols should be clear; the secondary grid skin should be flat, without table front policy depression, no resistance, scratching, rust. The points should be flexible. 5.3 Secondary grid surface
The secondary low and the plane connection should not be higher than C,02mn1. 5.4 Display
The display is a directional display, which can display 5 or more real numbers and symbols such as "-", "" and so on. All display sections of the display should be clear, and the height of the clear digits should not be less than 4. When the digital display unit is pressed, the display symbols should not change.
5.S.1 The display screen can display the value of the current, and the other points can be set arbitrarily. 5.5.2 When the output voltage is lower than the rated voltage, the display of the digital display unit will flash periodically to provide a function of increasing the power supply.
5.3 According to the needs of users, it can have other specific functions. 5.6 Minimum value error
The value error of the digital display unit should not be greater than (1.02m./s, 5
The effective current of the digital display unit should not be greater than 0.01nm. 5.8 The operating current
The current of the digital display unit is not greater than 224,
5.9 The speed of polarity movement
The speed of movement is not less than 2.5m./s. 5.10 The display value is allowed to change within one degree within the range of
5.11 Contact life
Test method
G. Product frequency treatment
6.1.1 Pretreatment system
Temperature: 20~25;
Relative intensity: 40%.~55%RI1
Air positive strength~1kPa.
1.2 The sample of the packaging should withstand 41% of the above conditions. If the sample is charged, the product should meet the requirements of 5.3~5.11. 6.2 Number of samples The unit's torsion alternating test uses N5 of B2123.62.1 Test cycle to 2.
6.2.2 Under mild quasi-atmospheric conditions, the recovery time can be 15h. 6.2.3 Post-extension inspection must be carried out in accordance with the provisions of Appendix 4 (standard chain requirements). 6.3 The constant heat test of the digital display unit shall be in accordance with G223.3.63.1 The test cooling duration is l46h
6.3.7 The electrical performance test is not carried out in the spare part state. 6.3.3 The final inspection shall be carried out in accordance with the provisions of Appendix A, and the extraction process is carried out in the sequence
JB/T 8371---1996
Then two loops
A-the first loop starts B-the first loop stops, the second loop does not end at +. The rate of delivery is
Figure 1-100 degree air change test shrinkage loop diagram
6.4 The dynamic test of the digital display unit shall be carried out according to GR2423.1C6.4.1 Alarm rate range: 5~71;--5H
6.4.2 Vibration: 1.0mm
.4.3 Duration 20m
6.4.4 The final test shall be carried out according to the provisions of Appendix A. 6.5 The impulse test of the digital display unit shall be carried out according to GB2429.5 pulse bucket The waveform is a semi-sine wave. The value of the impulse is 15×9./g. The impulse duration is 11ms. The impulse direction is X and Y, which are perpendicular to each other. The number of impacts is three times in each direction. 6.5.3 The final pull test shall be carried out in accordance with the provisions of Appendix A. Inspection rules 7.1 The product shall be inspected item by item in accordance with Appendix A before it can leave the factory 7.2 Finalization test: At least 50 random oil samples of the product shall be tested and inspected in accordance with the requirements of Section 5, Section 6 and the attached document. It shall meet the requirements, and shall be marked and packaged.1 The digital display unit should be marked with:
a) Manufacturer name or registered trademark:
b) Product number
8.2 The digital display unit should be marked on the box:
Manufacturer name or registered trademark,
b) Product name:
) Indication value specification:
d) Product validity item.
8.3 The digital display unit should be packaged in a static-proof manner, and the film should be placed inside the package to prevent the product from being damaged during transportation. 8.4 The digital display unit should have a product certificate, which should be marked with the standard number. Product design, production period. 4
A1 Standard conditions
Temperature: 2512
Humidity: 50 pieces:
Operating voltage: 1. 55V.
A2 Inspection device
JB/T8371196
Appendix A
Inspection method for digital display unit for capacitive barrier line displacement measurement system (Standard Appendix)
Accuracy 0.005mm. Equipped with a special inspection device with a case band section of 5.0amm. A3 Appearance requirements
Daily inspection shall comply with the provisions of 5.2.
A4 with two degrees
Compared to the 1st grade small-mouth ruler, the ruler inspection shall comply with the provisions of 5.3: AS display
After the digital display unit is working, the daily test inspection shall comply with the provisions of 5.4. After the light function
The display unit is added with L, the control chain is controlled, and the test inspection display shall comply with the current provisions of product 5: 7 Indication error
Under the standard recording, the display unit to be tested is fixed on the special inspection device. The distance between the brush grid and the bracket of the digital display unit is 0.15mm. Move the digital display unit within the range of one person, compare the difference between the value displayed by the digital display unit and the agreed value displayed by the special inspection device, connect the points to make a curve, and the difference between the high point and the low point on the coordinate of the measurement on the industry section shall comply with the visual determination of 5. A8
Under international standard conditions, put the digital display unit through a special tester and pass through a measuring point 10 times. The change in the value displayed by the tester is in accordance with the design of 5.7.
A9 Working current
Under standard conditions, use a special working current tester to check. When the display shows all zeros, the reading of the working current tester is the working current of the digital display unit. The test principle is shown in Figure A1. |tt||Figure A1 Test Principle
A10 Limit moving speed
Use rate meter to measure and set the system working frequency F, and then convert the working rate into the moving speed of the digital display unit through the formula \..=0.009921875/, which should be in accordance with the provisions of 5.9
A11 Display unit
Under standard conditions, keep the digital display unit without displacement and vibration, and check whether the change of the display value should meet the requirements of 5.10. A12 Melting point life
Put the laser display unit on the life test bench, use 2N force to make the avoidance point move for more than 10,000 times, and it should be able to work. 5
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