This standard specifies the verification technical requirements and verification methods for the drum speedometer test bench. This standard applies to the verification of the speedometer used for motor vehicle safety testing. GB/T 11798.4-2001 Verification Technical Requirements for Motor Vehicle Safety Testing Equipment Part 4: Verification Technical Requirements for Drum Speedometer Test Bench GB/T11798.4-2001 Standard download decompression password: www.bzxz.net

1Cs 43.020:43.180
National Standard of the People's Republic of Chinawww.bzxz.net
GB/T 11798. 1--11798. 92001
Motor vehicle safety testing equipment
Technical requirements for verification
Molor yehiele safety testing equipmentTechnical requirements of verification2001-04-29Published
The People's Republic of China
State Administration of Quality Supervision, Inspection and Quarantine
2001-12 01 Implementation
C1/T11798.4—2001
Standard is a revision of GB7256-1937. The applicable scope of GB/117-1798 is mainly for motor vehicles that are effectively used on the roads of my country. GB/117-1798-2001 has made the following changes to GB117-1798:
a) Change the general title of "Technical Requirements for Automobile Safety Inspection Equipment" to "Technical Requirements for Automobile Safety Inspection Equipment", and expand the applicable scope.
) Added G/T117SA.1GR/T11798 ... 7UX.D Part III This standard is the fourth part of the series of standards. The main differences between this standard and GB11708.4-1989 are: 1. It expands the scope of application and is applicable to the verification of all flow-type vehicle speedometer test benches. 2. Verification of zero error and zero point shift 3. For production vehicle speedometer test benches, the speed indication error test point is changed from m/.40k/h, 6ckm specified in the standard to 4Ukm/h. The replaced standard is consistent with the relevant production standards, and the electrical system safety requirements and the corresponding starting age are added. It is intended to deeply improve the use of equipment, GB/11798 supplements the motor vehicle safety residual The technical conditions for verification of testing equipment are summarized as follows: Part 1 (ie GB/T11758.2-2001), verification technical conditions for vehicle exhaust gas analyzers; Part 2 (ie GB/T11758.2-2001), verification technical conditions for simple stress brake test benches: Part 3 (ie GB/T11798.3-2011): verification technical conditions for vehicle exhaust gas analyzers; Part 4 (ie GB/T11758.1-2011): verification technical conditions for rolling speed test benches; Part 5 (ie GB/T11795.5-2001), verification technical conditions for filter paper smoke meters; Part Part 6 (i.e. GB/T1708.6-2001): Technical requirements for the calibration of differential light inspection instruments; Part 7 (i.e. G/T11732.7-2(1): Technical requirements for the calibration of axle (wheel) deflection detectors; Part 8 (i.e. GB/T11798.H-20G): Technical requirements for the calibration of wheel deflection detectors; Part 9 (i.e. GB/T11798.9-20C1): Technical requirements for the calibration of horizontal brake test benches. Appendix 4 and Appendix B of this standard are the decomposition of the standard and are the starting point of this standard. They also replace G11768.4-1!85. This standard is proposed by the People's Republic of China and the Ministry of Public Security. This standard is under the jurisdiction of Traffic Safety Bureau of Ministry of Public Security. The responsible drafting unit of this standard is: Traffic Management Science Research Institute of Ministry of Public Security. The main drafters of this standard are Fan Dajun, Zeng Yuan, Zhang Keda, Jin Zhong, Zhao Weixing and Hua Ce. It was issued in 2011.
National Standard of the People's Republic of China
Technical requirements for verification of motor vehicle safety testing equipment Part 4: Roller speedometer test bench
Technical requirements for verification
Motor vehicle safety testing equipmentTechnical regulations of verificationPart :Technical requirements for speedometer tester of roller lypen/T11798.4—2DC1
CE:175B. 1—1989
This standard defines the verification technical requirements and methods for the simplified speedometer test bench (hereinafter referred to as the test bench). This standard is applicable to: the calibration of the speed table for the analysis of the special meeting of the EMU. 2 Reference standards
The following referenced documents are included in the referenced documents and constitute multiple documents of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be marked. The use of this standard is for the convenience of all parties to discuss and control the possible connection of the following standard stock. GB/16527.71986 Basic safety test equipment for electric vehicles 3 Technical requirements
3.1 Appearance and general requirements
3.1.1 The speedometer should be clearly marked on the nameplate. The nameplate should indicate the equipment model, equipment name, rated load, and output! 3.1.2 Each control part such as switch, button socket, wire terminal, etc. shall have obvious symbol marks. The symbol marks shall comply with the relevant regulations. The work of the parts shall be flexible and tight, without looseness, jamming, etc. 3.1.3 The dial of the meter shall be adjustable, and shall not be bent or rotten. It shall not rise or fall. Digital display instruments shall have no defects that affect the reading. The digital display shall be within 5. The position retention time shall not be less than 84: 3-1.4 The hydraulic cylinder, lift, and magic lock shall be flexible, effective, and reliable. 3.2 System Safety
3.2.1 The vehicle shall have a grounding terminal, and there shall be a clear connection mark next to the terminal. The protective terminal shall be reliably connected to the protective grounding point through a special wire. 3.2.2 The safety of the electrical system shall comply with the provisions of B5587.105 for Class 1 safety instruments. The operating voltage shall not exceed 0C. The insulation resistance shall not be less than 5M. 3.3 Position identification and 4 points of this question. 3.3.1 The speed difference shall not exceed 1 rt. 3.3.2 The zero point shift of 31rin shall not be greater than 1d. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 1-14-29, 2001-12-1
GI/T 11798.2-20C1
Let 1; One-then the meter is only for the scale value, the mathematical display type is for the group review, that is: 8 The low-digit value of the display is a digital company, the state of the retreat value is more than 1ku./h, 3.4 The radial position of the roller surface is not larger than: mm. 3.5 The wear of the surface of the liquid cylinder is 1%D method 2: trademark type straight. m
3.6 The error of the indication: less than = 2 times ± 1
The speed table equipped with a printing device or configured on the speed detection system of the machine control, the instrument display value, print value or line meter product indication value should be consistent with this heat setting.
2 Verification method
4.1 Environmental conditions
A1.1 Temperature: 0-40C
4.1.2 Relative humidity
2.1.3 Power supply voltage: rated voltage ±10; 2.1.4 The measurement shall be carried out in an environment without pollution that may affect the measurement and without electromagnetic interference. 2.2 Insulation resistance meter (megohmmeter) with a measuring plate of not less than 100M SCV; flat (5mu1 level) or grass mark caliper (30um, 0.05mm), feeler gauge (1Ca, 0.01mm), one 100% night (1Ca, 0.01mm), one speed (usually 5), one 100% insulation resistance meter socket. It must be qualified by the light measurement department and used within the validity period. 4.3 General requirements for external modification inspection and maintenance, should be 3. 1.
4.4 Electrical system safety inspection
4.4. Manually check the grounding and protective earthing of the speedometer and instrument. The condition should meet the requirements of 3.2.1. 4.4.2 Insulation test. The vehicle and other power sources are turned on, the power switch is turned on, and the vehicle and the power supply wires of the power grid are connected to the wiring terminals and the protective earthing is tested with an insulation meter. It should meet the requirements of 3.2.2. 4.5 Verification of zero position error
Adjust the meter and let it rotate by itself: Repeat once, the maximum zero position deviation is the zero position error, which shall meet the requirements of 3.3.1:
.6 Verification of zero point deviation
After the adjustment, start measuring the zero position, record the zero deviation value every 0mi within 30min, for one time. Each 4-digit deviation value shall meet the requirements of 3.3.2
4.In order to verify the surface diameter of the chain, a point is set on the speed table that accounts for % of the total surface, and the percentage indicator is used to measure the circular motion between the diameters. The provisions of 3.1 shall be complied with. For chain chains with discontinuous outer ring surfaces (such as open rollers), the working surface (not the surface) or the web runout at the two surfaces is allowed to be measured.
4.8 Verification of partial shear loss on the surface
4.8.1 Use a flat ruler to determine the position of the chain with a speed sensor installed. The main component of the chain is evenly distributed around the whole chain. The flat ruler is used to measure the distance between the ruler and the chain. The local relative wear is calculated according to the formula (). The provisions of 3.5 shall be complied with. 35
Product history and:
GR/T 11798.4—20C1
2, the maximum time value of the three measurements m
a speedometer main length, pull:
rule length m;
a speedometer rolling mark displacement, m
4.3.2 Use the length of the vernier scale to measure the actual 5 with the length of the scale without using the standard caliper to determine the initial loss of the measurement. See the attached A (standard recording). 4.9 The minimum reading difference is required to be verified
4.3.1 Install the ball cloud potential on the speedometer, turn on the power of the instrument, adjust the instrument to zero, and then put the vehicle into the vehicle, and set the vehicle to stop on the chain. After doing the safety protection work, start the vehicle and drive the vehicle to the speed merge. Steps: When the vehicle speed is within the specified range of 1 km/h, record the indication of the vehicle instrument and the indication of the indicator, or calculate the temperature difference of each time according to the formula (2
, 2—the value of the vehicle returned to the vehicle for the first time is the difference, 2,3V, the vehicle returns to the vehicle for the first time: km./h (mE
—speed measurement: nominal outer diameter of the vehicle, mE
—speed measurement: /mir
×100%
). The arithmetic mean of the three indication errors is used as the age estimation, which complies with the provisions of 3.6. 3: When calibrating the vehicle with ±0.01% speed, except for the motor-driven vehicle, the determination method must be the same as 2)
4.S.2 For the EMUs equipped with printing devices or computer-controlled vehicles, the speed value and calibration time shall be printed or the position indicated by the computer shall be in accordance with the provisions of 6. 5. Calibration records
shall be recorded in real time, and its format is in Table 31 of the Appendix (Standard). 9
GB11798.220G1
(Standard except for recording)
Vernier caliper calibration chain surface local court measurement method In the middle section of the main roller calculation of the speed sensor, the entire length is evenly reported on the table, and the vernier caliper is used to measure the outside of the mother position, record the value, and start the maximum outer diameter and the most central outer diameter according to formula (3) to calculate the local surface arch of the liquid quotient &n _ Da - Da
Roller screen surface wear:
The maximum external stroke value in the five places, r:
The minimum external stroke value in the five places, :
——Roller nominal diameter, inr.
Standard)
Simple vehicle inverter test bench control record
Table H1 Commercial vehicle speedometer test bench calibration record Equipment name analysis
!
General management number
Structure
Safety
Zero position error and
Zero drift
Circular runout
Degree vortex
Study point ticket
! Bottle 4
Risk determination with oil
Agent manufacturer name
Nature determination A position
Chang Yu staff
Operator and line and year
Spring display instrument rate
Grounding complete supervision
Running natural heart
According to the fixed period
According to the inspector
Morning pregnancy position Bo high position
The most person Xu Tong jump number
CE/T 11798.4-2001
Table B complete)
Last report
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