GB/T 4301-1992 General technical requirements for electromagnetic speedometers for ships
Some standard content:
CDC 629. 12. 053
National Standard of the People's Republic of China
GB/T4301—92
General specification for marine electromagnetic speed logs
General specification for marine electromagnetic speed logs Issued on March 30, 1992
State Administration of Technical Supervision
Implementation on January 1, 1993
National Standard of the People's Republic of China
General specification for marine electromagnetic logs
General specification Tor marine electromagnetic logs This standard refers to the applicable international standard TEC:1023-19903 Marine speed and distance measuring equipment 31 Subject content and scope of application
GB/T 43D1-92
This standard specifies the technical requirements, test methods and inspection rules for marine inductive speed logs (hereinafter referred to as speed logs). This standard applies to odometers with variable gear type sensors and analog or digital displays. 2 Reference standards GH12367 General requirements and test methods for marine navigation equipment CB1C38 Technical conditions for marine navigation equipment and transport packages 3 Reference standards 3.1 Magnetic log An instrument that uses an electromagnetic induction principle to measure the relative motion of a ship relative to the water and calculate the voyage. 3.2 Sensors 3.3 A sensor that converts the relative motion of a ship relative to the water into a potential. 3.9 Analog speed signal The siroal unit can provide detection signals to check the working condition of the instrument. 3.4 Accuracy of velocity display The allowable difference between the velocity display value and the input velocity signal recorded value 3.5 True speed The actual velocity
The distance sailed in unit time in front of the ship when it is not affected by muddy water, wind, current and tide. 3.6 Accutacy of measurement at sea is the allowable value of the difference between the instrument speed and the ship's enjoyable speed when sailing in shallow water, current and range. 3.7 Speed (a) velocity
The ratio of the voyage value measured by a non-meter to the time taken to accumulate the voyage value, t,=$/t,(kn)
Where: s -- the accumulated voyage value, mile -- the time taken to calculate the voyage value, h. 3.B Voyage calculation The allowable value of the difference between the accumulated voyage value of a non-meter and the theoretical voyage value. The relative error is: =(5--33/$×100%
Wherein, - the cumulative distance value of the trip meter, nmilc: 5, - the theoretical distance value, nmik.
Approved by the State Administration of Technical Supervision on March 30, 1992 (1)
Implemented on January 1, 1993
F/T4301-92
narmanive workns 3.9 Normal working The measuring instrument should be able to work under the specified conditions and meet the requirements of the working state. Technical requirements 4. General requirements 4.7.1 Operating conditions The measuring instrument should be able to work under the following environmental conditions, ambient temperature, 15~+55h, relative strength: the relative strength is 2% when the value is ±3! Deviation: minimum 22.5° longitudinal frequency = 7°; d. Connection speed: horizontal probe soil 22. 5°. Cycle 1 (g: 1% cycle 8!
The benefits and the people need to collect the vibrations generated by the ship during navigation. e
4.1.2 Electricity
: The rated voltage of the meter should be 11V or 221!V, the frequency should be 5℃H or 60Hz: the power change should be the rated power: 3!
The frequency change should be 6% of the rated frequency,
4.1.3 Electricity dryer
All reasonable and feasible measures should be taken to eliminate and suppress the interference between the meter and other equipment on board, 4.1.4 The power value of the sound generated by the speedometer during normal working hours shall not exceed 55dB(A) 4.3-5 The width of the illumination period in the speedometer equipped with both the indicator and the navigation instrument (speed aid) shall be adjustable, b. The storage device of the speedometer shall be able to ensure that it can be extended and retracted when sailing at any speed; its extended and retracted positions shall be clearly marked on the display, c. The material technology of the speedometer shall ensure that it can be used in the East China Sea, 1. Inside the speedometer, The measurement is not loose, and the surface is not rusty or leaky. 4.1.6 Installation The installation requirements of the design are as follows: A (zero lock). 4.2 Performance requirements 4.2.1 Analog measurement accuracy: ±2, continuous display accuracy, +0.15kn (except negative accuracy); .
Range calculation accuracy: ±1 series;
The difference between the reading on the top display and the reading on the main display is not more than 6kn: d.
The difference between the navigation reading on the repeater and the display is not more than c.1 4.2.2 Test period
4.2.2.1 The speed displayed by the speed log shall not exceed 2% of the true speed of the vessel or 0.3km/h, whichever is greater. 4.2.2.2 The error of the speed log shall not exceed 2% of the true speed of the vessel or 0.03km/h (whichever is greater) within 1h. 4.2.2.3 When the speed log is affected by certain factors (such as water level drop, fishing gear, fishing materials, etc.), the relevant factors shall be recorded in the instrument manual. 2.3 The navigation information display mode and the speed display format of the navigation bar shall be changed as follows: 4.2.3-1 The speed information may be displayed in the form of digital numbers. The total increase shall not exceed 0.1k1: When the digital display is adopted, there shall be at least one scale of 0.s and each meter shall be marked with a number. The speed in both the forward and reverse directions of the ship shall be displayed. The direction of advance shall be indicated. GA/T 4301-92 4.2.3-2 The navigation information shall be displayed in digital form. The display range is 1~99.9mmile and the increment shall not exceed 0.rm4.2.4 The total range information shall be displayed in the form of digital numbers with the navigation information provided by the equipment inside. The information shall be displayed in the form of 0.Doinmile or other equivalent form. The time when the contact is closed or the effective pulse is changed shall not be less than 5m. 4.2.5 The power supply system of the speed meter does not include electrical appliances such as filter capacitors and circuit boards. The cold insulation resistance is not less than 10M2, and the insulation resistance of each component is less than 1. The hot insulation resistance is not less than 1M. 4.2.6 The dielectric constant of the speed meter should be subjected to an electrical test of 2IHV (1500V for rod-type sensors). There should be no breakdown or flashover in the test results. 4.2.7 The level of the sensor and the frequency converter should meet the requirements of the "product standard". 4.2.B The water sensor can withstand a water pressure of D.MPa. 4.2.9 Reliability The speed meter should have a non-variable mean time between failures (MTBF> 1-mean time between failures).The ship's true velocity and the speedometer's velocity are measured respectively. The annual average true velocity and the average speedometer's velocity are calculated according to the following formulas:
2=(+2+,)/4-
L=Uu+20g+Vp)/4*
W; wwW.bzxz.Net
Average true velocity;
Average speed of the speedometer:
,,W.-corresponding to the ship's true velocity V measured in the first, second and third measurements.
-should be the average of the speedometer's velocity measured in the first, second and third measurements (3)
, and the error of the speedometer is obtained. After adjustment, the above method is used to measure and deliver the accuracy of the marine measurement in stages. The result should meet the requirements of 4.2.2. 1. When the speed is too fast
, the main engine speed is generally selected from the three speeds used by ships, namely, reverse speed, medium reverse speed and high speed. It can also be selected with less or only 5.17 times the total speed of the test terminal
. When the simulated signal is applied for a period of time, the closure of each group of output contacts shall be accurately recorded. During the period, at least one level of closure shall be recorded. The results shall comply with the provisions of 1.2.4. 5.18 Insulation test
Use 5:1 non-effective meter to check the insulation resistance of the common power system and other components to the power supply [filter capacitors and printed circuit boards and other electrical appliances are suitable for the line J1-).F pin results also derive from the provisions of 4.2.5, 5.19 Voltage degradation test
Let the power supply box of the program enter the specification and the transmission room is not small, the test is carried out on the test equipment of H, the test voltage starts from 2cV3 and rises steadily to 2000V within 10 (100CV for the special alliance). Keep for 1uin, and then gradually drop to 5 and then cut off the power. The result meets the requirements of 4.2.6. 5.20 Reliability test
Reliability test method can be restored to product standards. 6 According to the rules
61 Inspection type
Factory risk:
h. Type inspection!
Verification, final inspection and adjustment.
6.2 Pre-production inspection
6.2-1H! Inspection schedule See Table 2.
GB/T 4301—92
6-2.2 Factory inspection is carried out by the manufacturer. 6.2.3 Each meter shall be inspected in reverse order. The debugged meter shall be connected to the test sequence specified in Table 2 for inspection. The inspection certificate can be used.
5.3 Type control meter shall be inspected in the following circumstances: 5. 3- 1
When the trial production of new products is submitted for appraisal and finalization: b.
When the product structure, materials, manufacturing process, etc. undergo major changes, which affect its main performance, the product shall be transferred;
After the product is transferred to normal production, it shall be carried out once every five years. The type inspection items are shown in Table 2
Present purchase
Make the bed display accurate
Procedure
&Meter indicator configuration
Navigation information transmission
Energy hardness
Net reducer water pressure test sheet
6! Sensor grease test
Water area test
External electric strong change test
Interference test
Heart to heart
Lack of moisture research
Road moisture test
Careful chicken test
Report dynamic test
Read and make up for the test
You offer test
Fusion source resistance test
Sea force
Can be squeezed by the coast test
Factory age
Type inspection
Purple room, fixed profit inspection
Rejection of technical conditions
4. 2. 1 h.
, g- I e-
4. 2. 1 r.
4-1-1b
4. 1, te
dt I r
..2- 2. 1
4. 2. 2- :
Test method
5- 1n-3
GB/4301-92
6.3-3 Type inspection test selection and test set evaluation. 6.3.3.1 Randomly select one of the factory control test sets and conduct type inspection in the order specified in Table 2. 6.3.3-2 During the test, if the set is not in good condition, the cause should be found out. After the fault is eliminated, the test and the tests related to the item should be repeated. After the test is completed, continue to test the remaining items. If the fault cannot be eliminated, the test and the tests related to the test set should be repeated. After passing the test, the blood pressure is lowered and the test items are supplemented. If there is still a trend of non-compliance, the control test shall be terminated.
6.4 Identification and type test
6.4.1 Identification type test items are shown in Table 2.
6.4.2 Identification type test sample collection and test results shall comply with the provisions of 6.3.3, and the packaging, transportation and storage
7.1 Marking
7.1.1 The main components of the speedometer shall be marked with the following durable and reliable brands. H.
Manufacturer name or trade name;
Product name;
Product state number:
Factory number!
Ship inspection mark:
Date of delivery.
7.2 Packaging, transportation and storage
The requirements of CB3B are met,
u/1 4301-92
Appendix A
Requirements for the installation of speed log
(reference)
A1, when different methods are used to fix the speed log, and when any parts are damaged, they should not be allowed to enter the ship.
A2 The sensor should be installed at the place on the bottom of the ship that is less affected by the water flow, and ensure that the angle between the 43 comfort mark line and the ship's collapse distance line is within ±1\ when the water flow is small and the maximum amount of water is small. 44 There should be no strong electric field near the sensor, and there should be no protrusions that affect the smoothness of the water flow line and non-contact and non-contact products in the 5m area in front of it.
This standard is under the jurisdiction of the Technical Committee of the Navigation Instrument Division of the National Oceanic Ship Standardization Technical Committee. This standard was drafted by the Shanghai Aircraft Standardization Institute, the Standardization Office of the Seventh Research Institute of China Shipbuilding Industry Corporation, and the Kangjiang Branch of the Institute of China Shipbuilding Industry Corporation.
The main drafters of this standard are Jin Guang, Ku Jinbin, Wang Ni, Cheng Zhongwu, Xiang Hong, and 8
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