CN113758500A - Pulse non-contact vehicle mileage meter sensor acceptance method - Google Patents

Pulse non-contact vehicle mileage meter sensor acceptance method Download PDF

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CN113758500A
CN113758500A CN202110928966.1A CN202110928966A CN113758500A CN 113758500 A CN113758500 A CN 113758500A CN 202110928966 A CN202110928966 A CN 202110928966A CN 113758500 A CN113758500 A CN 113758500A
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test
vehicle mileage
sample
vehicle
sensor sample
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CN113758500B (en
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王光艳
杨传雄
李文宪
张文婷
何许
张宇涛
姚世杰
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Dongfeng Automobile Co Ltd
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Dongfeng Automobile Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30—Computing systems specially adapted for manufacturing

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Abstract

A pulse non-contact vehicle mileage meter sensor acceptance method comprises the steps of extracting a vehicle mileage meter sensor sample; performing basic test on all vehicle mileage meter sensor samples and recording the test process and results; dividing a vehicle mileage meter sensor sample into two sample groups; sequentially carrying out temperature influence test, voltage test, power line conductive coupling anti-interference test, vibration test, insulation and pressure resistance test, dustproof and waterproof test, industrial solvent resistance test, durability test under high temperature and high pressure and impact test on samples in a sample group, and recording the test process and results; performing salt spray resistance test on the samples in the other sample group, and recording the test process and the test result; and summarizing the test process and the test result and making a detection report. The design can carry out all-round detection to the vehicle mileage instrument sensor product of new design, avoids product defect and causes economic loss, and then reduces development cost.

Description

Pulse non-contact vehicle mileage meter sensor acceptance method
Technical Field
The invention relates to a sensor acceptance method, in particular to a pulse non-contact vehicle mileage meter sensor acceptance method which is particularly suitable for testing and acceptance of a newly designed and produced sensor.
Background
A vehicle odometer sensor is a sensing device used to detect the instantaneous speed of a vehicle. The pulse non-contact vehicle odometer sensor is generally arranged in a gearbox, works by utilizing the Hall effect, and is not in physical contact with a transmission gear of a vehicle odometer. When the vehicle is running, the output shaft of the variable box rotates, the transmission gear of the speedometer rotates along with the rotation, the odometer sensor outputs a certain pulse model which changes periodically, the linear speed of the gear can be calculated according to the pulse signal, and then the relative mileage distance can be calculated in the running process.
After the existing pulse non-contact vehicle mileage meter sensor is checked and accepted, due to the fact that testing is not standard or testing standards are not properly set, batch badness is prone to occurring in the using process after the design is finished and large-scale production is carried out; meanwhile, due to the fact that production and test standards of different manufacturers are different, differences in performance of newly designed products are prone to being caused, and therefore a complete and strong-operability acceptance process is needed for the newly designed vehicle mileage instrument sensor product, the newly designed product is detected in an all-around mode, the risk that the product is bad in batch in the using process due to improper design or production is reduced while the newly designed product meets the national standard, and the product development and production cost is further reduced.
Disclosure of Invention
The invention aims to solve the problems that a newly designed vehicle mileage meter sensor product in the prior art is lack of all-dimensional detection, and the product is easy to be out of compliance or has high reject ratio, and provides a pulse non-contact vehicle mileage meter sensor acceptance method.
In order to achieve the above purpose, the technical solution of the invention is as follows:
a pulse non-contact vehicle odometer sensor acceptance method comprises the following steps:
s1, after the vehicle mileage meter sensor is designed and put into production, randomly drawing 10 vehicle mileage meter sensor samples from the same batch of products;
s2, performing basic test on all 10 vehicle mileage meter sensor samples, and recording the test process and results;
s3, dividing the 10 vehicle odometer sensor samples into a first sample group and a second sample group, wherein each of the first sample group and the second sample group comprises 5 vehicle odometer sensor samples;
s4, sequentially carrying out temperature influence test, voltage test, power line conductive coupling anti-interference test, vibration test, insulation pressure resistance test, dust and water prevention test, industrial solvent resistance test, durability test at high temperature and high pressure and impact test on the vehicle mileage meter sensor samples in the first sample group, and recording the test process and results;
meanwhile, performing a salt spray resistance test on the vehicle mileage meter sensor sample in the second sample group, and recording the test process and the test result;
s5, after the test is finished, summarizing the test process and the test result, and making a detection report:
if the test results of the basic tests of the 10 vehicle mileage instrument sensor samples in the S2 are all qualified, the test results of the samples in the first sample group in the S4 in the temperature influence test, the voltage test, the power line conduction coupling anti-interference test, the vibration test, the insulation pressure resistance test, the dust-proof and water-proof test, the industrial solvent resistance test, the durability test, the high-temperature and high-pressure durability test and the impact test are all qualified, and the test results of the samples in the second sample group in the S4 in the salt mist resistance test are all qualified, the vehicle mileage instrument sensor product in the batch is qualified and accepted, and the vehicle mileage instrument sensor can enter the formal production flow;
if the vehicle mileage meter sensor sample is unqualified in any test result, the vehicle mileage meter sensor products of the batch are unqualified, a detection report is sent to a design part and a production part, and the design part and the production part analyze the defects of the vehicle mileage meter sensor in the design and production processes respectively.
The basic test comprises appearance check and output signal characteristic test:
a. and (3) appearance inspection: under the uniform illumination of 300Lx and the mesh distance of 630mm, checking whether the external surface of the vehicle mileage instrument sensor has scratches, deformation and cracks or not, and whether the joint part of the vehicle mileage instrument sensor has sharp-angled burrs or not, and if the external surface of the vehicle mileage instrument sensor does not have scratches, deformation and cracks or the joint part of the vehicle mileage instrument sensor does not have sharp-angled burrs, checking the appearance to be qualified;
if the outer surface of the vehicle mileage meter sensor has scratches, deformation or cracks, the appearance inspection is unqualified, and meanwhile, if the joint part of the vehicle mileage meter sensor has sharp-angled burrs, the appearance inspection is unqualified;
b. and (3) output signal characteristic test: installing a vehicle mileage instrument sensor sample to be tested on a test bed, enabling the vehicle mileage instrument sensor to work under a rated voltage, detecting an output signal of the vehicle mileage instrument sensor by using an oscilloscope, and if the output signal of the vehicle mileage instrument sensor sample is normal, testing the characteristic of the output signal to be qualified; if the output signal of the vehicle mileage meter sensor sample is abnormal, the output signal characteristic test is unqualified;
if the appearance inspection of one vehicle mileage meter sensor sample is qualified and the output signal characteristic test is qualified, the basic test result of the vehicle mileage meter sensor sample is qualified; if any one of the appearance inspection and the output signal characteristic test of one vehicle mileage meter sensor sample is unqualified, the basic test result of the vehicle mileage meter sensor sample is unqualified;
the appearance inspection and the output signal characteristic test are both carried out in a standard environment, and the standard environment simultaneously satisfies the following three conditions:
a. the temperature is 15-30 ℃;
b. humidity: 40% -85%;
c. air pressure: 85kPa to 105 kPa.
The temperature influence test comprises a high temperature test, a low temperature test and a temperature resistance test, wherein the high temperature test comprises the following steps:
a1, putting the vehicle mileage meter sensor sample into a high-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to 120 +/-2 ℃, placing the vehicle mileage meter sensor sample in the high-temperature box at 120 +/-2 ℃ for 8 hours, and then taking the vehicle mileage meter sensor sample out of the high-temperature box and placing the vehicle mileage meter sensor sample in a standard environment for at least 5 hours;
a2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the high-temperature tests of the vehicle mileage instrument sensor are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the high temperature test of the vehicle mileage meter sensor sample is unqualified;
the low temperature test comprises the following steps:
b1, putting the vehicle odometer sensor sample into a low-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to minus 40 +/-3 ℃, taking out the vehicle odometer sensor sample after 8 hours, and then placing the vehicle odometer sensor sample in a standard environment for at least 4 hours;
b2, performing B and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the low-temperature tests of the vehicle mileage instrument sensor sample are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the low temperature test of the vehicle mileage meter sensor sample is unqualified;
the temperature resistance test comprises the following steps:
c1, exposing the sample of the vehicle odometer sensor which is not in the working state to high temperature of 70 ℃ for 1440 minutes, and then exposing the sample of the vehicle odometer sensor to low temperature of-15 ℃ for 1440 minutes;
c2, repeating the steps in C1 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the temperature resistance tests of the vehicle mileage instrument sensor sample are qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the temperature resistance test of the vehicle mileage meter sensor sample is unqualified;
if the high-temperature test, the low-temperature test and the temperature resistance test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; and if any one of the high-temperature test, the low-temperature test and the temperature resistance test of the vehicle mileage meter sensor sample is unqualified, the temperature influence test result of the vehicle mileage meter sensor sample is unqualified.
The voltage test comprises the following steps: voltage influence test, power supply reverse connection test and overvoltage test; the voltage influence test comprises the following steps:
d1, mounting the vehicle mileage meter sensor sample on a test bed, and enabling the vehicle mileage meter sensor sample to be in a working state;
d2, slowly increasing the voltage of the vehicle odometer sensor sample to the highest working voltage, enabling the vehicle odometer sensor sample to run for 1.5 minutes under the highest working allowable voltage, and then slowly decreasing the voltage of the vehicle odometer sensor sample to the lowest working voltage, and enabling the vehicle odometer sensor sample to run for 1.5 minutes under the lowest working voltage;
d3, repeating the steps in D2 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the vehicle mileage instrument sensor sample voltage influences the tests to be qualified; if the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the influence of the voltage of the vehicle mileage meter sensor sample on the test is unqualified;
the time for slowly increasing the voltage of the sample connected to the vehicle odometer sensor to the highest working voltage in the D2 is not less than 10 seconds; in the step C2, the time for slowly reducing the voltage of the sample connected to the vehicle odometer sensor to the lowest working voltage is not less than 10 seconds;
the power supply reverse connection test comprises the following steps:
e1, mounting the vehicle odometer sensor sample on a test bed, and reversely connecting the positive electrode and the negative electrode of the vehicle odometer sensor sample in a circuit;
e2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample power supply reversal test is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the reverse connection test of the vehicle mileage meter sensor sample power supply is not qualified;
the overvoltage test comprises the following steps:
f1, mounting the vehicle odometer sensor sample on a test bed, and connecting a power supply with the voltage higher than the rated voltage of the vehicle odometer sensor to the positive electrode and the negative electrode of the vehicle odometer sensor sample;
f2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample is qualified in an overvoltage test; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the vehicle mileage meter sensor sample is not qualified in the overvoltage test;
if the voltage influence test, the power supply reverse connection test and the overvoltage test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; and if any one of the voltage influence test, the power supply reverse connection test and the overvoltage test of the sample of the vehicle mileage meter sensor is unqualified, the voltage test result of the sample of the vehicle mileage meter sensor is unqualified.
The insulation and voltage resistance test comprises the following steps:
g1, applying a test voltage which is not more than half of the set voltage between the shell of the sensor sample and the ungrounded instrument circuit system, uniformly and slowly increasing the test voltage until the test voltage is equal to the set voltage, then maintaining the test voltage unchanged, and slowly decreasing the test voltage until the test voltage is zero after 1 minute;
if the vehicle mileage instrument sensor sample generates electric leakage in the process, the result of the insulation voltage withstand test of the vehicle mileage instrument sensor sample is unqualified; if the vehicle mileage meter sensor sample does not leak electricity in the process, entering the next step;
g2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the insulation voltage resistance test result of the vehicle mileage instrument sensor sample is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the insulation withstand voltage test result of the vehicle mileage meter sensor sample is unqualified;
the time for applying the voltage in the rising process is not less than 10 seconds, the time for applying the voltage in the falling process is not less than 10 seconds, and the set voltage is a sinusoidal alternating voltage with the peak value of 550V and the frequency of 50 Hz.
The industrial solvent resistance test comprises the following steps:
h1, respectively using five industrial solvents of gear oil, gearbox lubricating oil, diesel oil, gasoline or snow melt agent to sequentially perform an industrial solvent resistance test on the same vehicle odometer sensor sample:
dripping a small amount of industrial solvent on the surface of the vehicle odometry instrument sensor sample under the condition that the vehicle odometry instrument sensor sample does not work, standing the vehicle odometry instrument sensor sample for 4 hours, and then removing the industrial solvent on the surface of the vehicle odometry instrument sensor sample;
h2, checking whether the surface coating of the vehicle mileage meter sensor sample is rusted, and performing b, output signal characteristic test in the basic test on the vehicle mileage meter sensor sample;
if the surface coating of the vehicle mileage meter sensor sample is not rusted and the output signal characteristic of the vehicle mileage meter sensor sample is qualified in the test, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is qualified; and if the surface coating of the vehicle mileage meter sensor sample is rusted or the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is unqualified.
The high-temperature high-pressure durability test comprises the following steps:
i1, placing the vehicle mileage meter sensor sample in an environment where lubricating oil splashes randomly for 400 hours under the condition that the vehicle mileage meter sensor sample does not work, wherein the temperature of the randomly splashed lubricating oil is 120 ℃, and the pressure of the randomly splashed lubricating oil is 49.9 Kpa;
i2, performing basic test on the vehicle mileage meter sensor sample, and checking whether the surface coating of the vehicle mileage meter sensor sample is rusted;
if the basic test result of the vehicle mileage meter sensor sample is qualified and the surface coating of the vehicle mileage meter sensor sample is not rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is qualified; and if the basic test result of the vehicle mileage meter sensor sample is unqualified or the surface coating of the vehicle mileage meter sensor sample is rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is unqualified.
The durability test comprises the following steps: mounting a vehicle mileage meter sensor sample on a test bed, and continuously operating the vehicle mileage meter sensor for 360 hours under rated voltage;
if the vehicle mileage meter sensor sample does not fail after continuously running for 360 hours, the result of the durability test of the vehicle mileage meter sensor sample is qualified; and if the sample of the vehicle mileage meter sensor fails in continuous operation, the result of the durability test of the sample of the vehicle mileage meter sensor is unqualified.
The salt spray resistance test is carried out according to the requirements of GB/T2423.17;
the power line conductive coupling anti-interference test is carried out according to the requirements in GB/T21437.2;
the dustproof and waterproof test is carried out according to the requirements in GB/T4942.1;
the vibration test is carried out according to the requirements in GB/T2423.58;
the impact test was carried out according to the requirements in GB/T2423.55.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the pulse non-contact vehicle mileage instrument sensor acceptance method, all the extracted samples are subjected to basic tests, then the samples are divided into two sample groups, one sample group is subjected to temperature influence tests, voltage tests, power line conductive coupling anti-interference tests, vibration tests, insulation and pressure resistance tests, dust and water prevention tests, industrial solvent resistance tests, durability tests, high-temperature and high-pressure durability tests and impact tests, and the test process and results are recorded; performing salt spray resistance test on the other sample group, and recording the test process and the test result; the detection can comprehensively reflect each performance of the batch of products, if the batch of products are not in compliance, the recorded test process, namely a detection report formed by summarizing test results, can be sent to a design department and a production department, the defects of the batch of products in the design and production processes can be analyzed in time, the design or production processing process can be modified in time, economic loss caused by batch poor products can be avoided, and further the cost is reduced. Therefore, the samples are grouped in the method, a series of tests are carried out on the samples in the two sample groups according to different groups, the performance of the vehicle mileage meter sensor of the batch is detected in an all-round way, the economic loss caused by product defects is avoided, and the development cost is further reduced.
2. After all samples in the pulse non-contact vehicle mileage instrument sensor acceptance method are subjected to basic test, the samples are divided into two sample groups, wherein the samples in one sample group are subjected to salt spray resistance test which can damage the surfaces of the samples, and the samples in the other sample group are subjected to test which can not damage the surfaces of the samples, so that mutual interference is avoided; and the test is carried out simultaneously by two sample groups, so that the time can be saved, and the test efficiency can be improved. Therefore, the method carries out grouping test on the samples, avoids mutual interference among different tests and improves the test efficiency.
3. The pulse non-contact type vehicle mileage meter sensor acceptance method comprises an industrial solvent resistance test, five industrial solvents of gear oil, gearbox lubricating oil, diesel oil, gasoline or a snow melting agent are respectively used for testing a vehicle mileage meter sensor sample, the test environment is more fit with the real working environment of the vehicle mileage meter sensor arranged on a light truck, and the test result can effectively reflect the performance of the vehicle mileage meter sensor in actual use. Therefore, the method comprises an industrial solvent resistance test, and the performance of the vehicle odometer sensor in practical application can be better reflected.
4. According to the acceptance method of the pulse non-contact vehicle mileage meter sensor, the high-temperature and high-pressure durability test is carried out on the sample, the test environment simulates the actual working conditions possibly met by the vehicle mileage meter sensor, and the test result is more practical. Therefore, the actual operating mode that vehicle mileage meter sensor probably met is imitated to test environment in this design, and the test result is more laminated reality.
Drawings
FIG. 1 is a wiring schematic of a vehicle odometer sensor.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
A pulse non-contact vehicle odometer sensor acceptance method comprises the following steps:
s1, after the vehicle mileage meter sensor is designed and put into production, randomly drawing 10 vehicle mileage meter sensor samples from the same batch of products;
s2, performing basic test on all 10 vehicle mileage meter sensor samples, and recording the test process and results;
s3, dividing the 10 vehicle odometer sensor samples into a first sample group and a second sample group, wherein each of the first sample group and the second sample group comprises 5 vehicle odometer sensor samples;
s4, sequentially carrying out temperature influence test, voltage test, power line conductive coupling anti-interference test, vibration test, insulation pressure resistance test, dust and water prevention test, industrial solvent resistance test, durability test at high temperature and high pressure and impact test on the vehicle mileage meter sensor samples in the first sample group, and recording the test process and results;
meanwhile, performing a salt spray resistance test on the vehicle mileage meter sensor sample in the second sample group, and recording the test process and the test result;
s5, after the test is finished, summarizing the test process and the test result, and making a detection report:
if the test results of the basic tests of the 10 vehicle mileage instrument sensor samples in the S2 are all qualified, the test results of the samples in the first sample group in the S4 in the temperature influence test, the voltage test, the power line conduction coupling anti-interference test, the vibration test, the insulation pressure resistance test, the dust-proof and water-proof test, the industrial solvent resistance test, the durability test, the high-temperature and high-pressure durability test and the impact test are all qualified, and the test results of the samples in the second sample group in the S4 in the salt mist resistance test are all qualified, the vehicle mileage instrument sensor product in the batch is qualified and accepted, and the vehicle mileage instrument sensor can enter the formal production flow;
if the vehicle mileage meter sensor sample is unqualified in any test result, the vehicle mileage meter sensor products of the batch are unqualified, a detection report is sent to a design part and a production part, and the design part and the production part analyze the defects of the vehicle mileage meter sensor in the design and production processes respectively.
The basic test comprises appearance check and output signal characteristic test:
a. and (3) appearance inspection: under the uniform illumination of 300Lx and the mesh distance of 630mm, checking whether the external surface of the vehicle mileage instrument sensor has scratches, deformation and cracks or not, and whether the joint part of the vehicle mileage instrument sensor has sharp-angled burrs or not, and if the external surface of the vehicle mileage instrument sensor does not have scratches, deformation and cracks or the joint part of the vehicle mileage instrument sensor does not have sharp-angled burrs, checking the appearance to be qualified;
if the outer surface of the vehicle mileage meter sensor has scratches, deformation or cracks, the appearance inspection is unqualified, and meanwhile, if the joint part of the vehicle mileage meter sensor has sharp-angled burrs, the appearance inspection is unqualified;
b. and (3) output signal characteristic test: installing a vehicle mileage instrument sensor sample to be tested on a test bed, enabling the vehicle mileage instrument sensor to work under a rated voltage, detecting an output signal of the vehicle mileage instrument sensor by using an oscilloscope, and if the output signal of the vehicle mileage instrument sensor sample is normal, testing the characteristic of the output signal to be qualified; if the output signal of the vehicle mileage meter sensor sample is abnormal, the output signal characteristic test is unqualified;
if the appearance inspection of one vehicle mileage meter sensor sample is qualified and the output signal characteristic test is qualified, the basic test result of the vehicle mileage meter sensor sample is qualified; if any one of the appearance inspection and the output signal characteristic test of one vehicle mileage meter sensor sample is unqualified, the basic test result of the vehicle mileage meter sensor sample is unqualified;
the appearance inspection and the output signal characteristic test are both carried out in a standard environment, and the standard environment simultaneously satisfies the following three conditions:
a. the temperature is 15-30 ℃;
b. humidity: 40% -85%;
c. air pressure: 85kPa to 105 kPa.
The temperature influence test comprises a high temperature test, a low temperature test and a temperature resistance test, wherein the high temperature test comprises the following steps:
a1, putting the vehicle mileage meter sensor sample into a high-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to 120 +/-2 ℃, placing the vehicle mileage meter sensor sample in the high-temperature box at 120 +/-2 ℃ for 8 hours, and then taking the vehicle mileage meter sensor sample out of the high-temperature box and placing the vehicle mileage meter sensor sample in a standard environment for at least 5 hours;
a2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the high-temperature tests of the vehicle mileage instrument sensor are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the high temperature test of the vehicle mileage meter sensor sample is unqualified;
the low temperature test comprises the following steps:
b1, putting the vehicle odometer sensor sample into a low-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to minus 40 +/-3 ℃, taking out the vehicle odometer sensor sample after 8 hours, and then placing the vehicle odometer sensor sample in a standard environment for at least 4 hours;
b2, performing B and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the low-temperature tests of the vehicle mileage instrument sensor sample are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the low temperature test of the vehicle mileage meter sensor sample is unqualified;
the temperature resistance test comprises the following steps:
c1, exposing the sample of the vehicle odometer sensor which is not in the working state to high temperature of 70 ℃ for 1440 minutes, and then exposing the sample of the vehicle odometer sensor to low temperature of-15 ℃ for 1440 minutes;
c2, repeating the steps in C1 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the temperature resistance tests of the vehicle mileage instrument sensor sample are qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the temperature resistance test of the vehicle mileage meter sensor sample is unqualified;
if the high-temperature test, the low-temperature test and the temperature resistance test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; and if any one of the high-temperature test, the low-temperature test and the temperature resistance test of the vehicle mileage meter sensor sample is unqualified, the temperature influence test result of the vehicle mileage meter sensor sample is unqualified.
The voltage test comprises the following steps: voltage influence test, power supply reverse connection test and overvoltage test; the voltage influence test comprises the following steps:
d1, mounting the vehicle mileage meter sensor sample on a test bed, and enabling the vehicle mileage meter sensor sample to be in a working state;
d2, slowly increasing the voltage of the vehicle odometer sensor sample to the highest working voltage, enabling the vehicle odometer sensor sample to run for 1.5 minutes under the highest working allowable voltage, and then slowly decreasing the voltage of the vehicle odometer sensor sample to the lowest working voltage, and enabling the vehicle odometer sensor sample to run for 1.5 minutes under the lowest working voltage;
d3, repeating the steps in D2 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the vehicle mileage instrument sensor sample voltage influences the tests to be qualified; if the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the influence of the voltage of the vehicle mileage meter sensor sample on the test is unqualified;
the time for slowly increasing the voltage of the sample connected to the vehicle odometer sensor to the highest working voltage in the D2 is not less than 10 seconds; in the step C2, the time for slowly reducing the voltage of the sample connected to the vehicle odometer sensor to the lowest working voltage is not less than 10 seconds;
the power supply reverse connection test comprises the following steps:
e1, mounting the vehicle odometer sensor sample on a test bed, and reversely connecting the positive electrode and the negative electrode of the vehicle odometer sensor sample in a circuit;
e2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample power supply reversal test is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the reverse connection test of the vehicle mileage meter sensor sample power supply is not qualified;
the overvoltage test comprises the following steps:
f1, mounting the vehicle odometer sensor sample on a test bed, and connecting a power supply with the voltage higher than the rated voltage of the vehicle odometer sensor to the positive electrode and the negative electrode of the vehicle odometer sensor sample;
f2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample is qualified in an overvoltage test; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the vehicle mileage meter sensor sample is not qualified in the overvoltage test;
if the voltage influence test, the power supply reverse connection test and the overvoltage test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; and if any one of the voltage influence test, the power supply reverse connection test and the overvoltage test of the sample of the vehicle mileage meter sensor is unqualified, the voltage test result of the sample of the vehicle mileage meter sensor is unqualified.
The insulation and voltage resistance test comprises the following steps:
g1, applying a test voltage which is not more than half of the set voltage between the shell of the sensor sample and an ungrounded instrument circuit system, uniformly and slowly increasing the test voltage until the test voltage is equal to the set voltage, then maintaining the test voltage unchanged, and slowly decreasing the test voltage until the test voltage is zero after 1 minute;
if the vehicle mileage instrument sensor sample generates electric leakage in the process, the result of the insulation voltage withstand test of the vehicle mileage instrument sensor sample is unqualified; if the vehicle mileage meter sensor sample does not leak electricity in the process, entering the next step;
g2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the insulation voltage resistance test result of the vehicle mileage instrument sensor sample is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the insulation withstand voltage test result of the vehicle mileage meter sensor sample is unqualified;
the time for applying the voltage in the rising process is not less than 10 seconds, the time for applying the voltage in the falling process is not less than 10 seconds, and the set voltage is a sinusoidal alternating voltage with the peak value of 550V and the frequency of 50 Hz.
The industrial solvent resistance test comprises the following steps:
h1, respectively using five industrial solvents of gear oil, gearbox lubricating oil, diesel oil, gasoline or snow melt agent to sequentially perform an industrial solvent resistance test on the same vehicle odometer sensor sample:
dripping a small amount of industrial solvent on the surface of the vehicle odometry instrument sensor sample under the condition that the vehicle odometry instrument sensor sample does not work, standing the vehicle odometry instrument sensor sample for 4 hours, and then removing the industrial solvent on the surface of the vehicle odometry instrument sensor sample;
h2, checking whether the surface coating of the vehicle mileage meter sensor sample is rusted, and performing b, output signal characteristic test in the basic test on the vehicle mileage meter sensor sample;
if the surface coating of the vehicle mileage meter sensor sample is not rusted and the output signal characteristic of the vehicle mileage meter sensor sample is qualified in the test, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is qualified; and if the surface coating of the vehicle mileage meter sensor sample is rusted or the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is unqualified.
The high-temperature high-pressure durability test comprises the following steps:
i1, placing the vehicle mileage meter sensor sample in an environment where lubricating oil splashes randomly for 400 hours under the condition that the vehicle mileage meter sensor sample does not work, wherein the temperature of the randomly splashed lubricating oil is 120 ℃, and the pressure of the randomly splashed lubricating oil is 49.9 Kpa;
i2, performing basic test on the vehicle mileage meter sensor sample, and checking whether the surface coating of the vehicle mileage meter sensor sample is rusted;
if the basic test result of the vehicle mileage meter sensor sample is qualified and the surface coating of the vehicle mileage meter sensor sample is not rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is qualified; and if the basic test result of the vehicle mileage meter sensor sample is unqualified or the surface coating of the vehicle mileage meter sensor sample is rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is unqualified.
The durability test comprises the following steps: mounting a vehicle mileage meter sensor sample on a test bed, and continuously operating the vehicle mileage meter sensor for 360 hours under rated voltage;
if the vehicle mileage meter sensor sample does not fail after continuously running for 360 hours, the result of the durability test of the vehicle mileage meter sensor sample is qualified; and if the sample of the vehicle mileage meter sensor fails in continuous operation, the result of the durability test of the sample of the vehicle mileage meter sensor is unqualified.
The salt spray resistance test is carried out according to the requirements of GB/T2423.17;
the power line conductive coupling anti-interference test is carried out according to the requirements in GB/T21437.2;
the dustproof and waterproof test is carried out according to the requirements in GB/T4942.1;
the vibration test is carried out according to the requirements in GB/T2423.58;
the impact test was carried out according to the requirements in GB/T2423.55.
The principle of the invention is illustrated as follows:
in the method, all tests are based on the following standard environments:
a. the temperature is 15-30 ℃;
b. humidity: 40% -85%;
c. air pressure: 85kPa to 105 kPa;
when the environment experiment is carried out on the vehicle mileage meter sensor, the corresponding variable is changed on the basis of the standard environment for testing, for example, when a high-temperature test is carried out, the temperature of the test environment is correspondingly changed.
In the voltage influence test, the highest operating voltage refers to the maximum continuous operating voltage allowed to be applied between the positive electrode and the negative electrode of the vehicle odometer sensor; the lowest operating voltage refers to the lowest voltage at which the vehicle odometer sensor is maintained to operate properly.
Example 1:
a pulse non-contact vehicle odometer sensor acceptance method comprises the following steps:
s1, after the vehicle mileage meter sensor is designed and put into production, randomly drawing 10 vehicle mileage meter sensor samples from the same batch of products;
s2, performing basic test on all 10 vehicle mileage meter sensor samples, and recording the test process and results;
s3, dividing the 10 vehicle odometer sensor samples into a first sample group and a second sample group, wherein each of the first sample group and the second sample group comprises 5 vehicle odometer sensor samples;
s4, sequentially carrying out temperature influence test, voltage test, power line conductive coupling anti-interference test, vibration test, insulation pressure resistance test, dust and water prevention test, industrial solvent resistance test, durability test at high temperature and high pressure and impact test on the vehicle mileage meter sensor samples in the first sample group, and recording the test process and results;
meanwhile, performing a salt spray resistance test on the vehicle mileage meter sensor sample in the second sample group, and recording the test process and the test result;
s5, after the test is finished, summarizing the test process and the test result, and making a detection report:
if the test results of the basic tests of the 10 vehicle mileage instrument sensor samples in the S2 are all qualified, the test results of the samples in the first sample group in the S4 in the temperature influence test, the voltage test, the power line conduction coupling anti-interference test, the vibration test, the insulation pressure resistance test, the dust-proof and water-proof test, the industrial solvent resistance test, the durability test, the high-temperature and high-pressure durability test and the impact test are all qualified, and the test results of the samples in the second sample group in the S4 in the salt mist resistance test are all qualified, the vehicle mileage instrument sensor product in the batch is qualified and accepted, and the vehicle mileage instrument sensor can enter the formal production flow;
if the vehicle mileage meter sensor sample is unqualified in any test result, the vehicle mileage meter sensor products of the batch are unqualified, a detection report is sent to a design part and a production part, and the design part and the production part analyze the defects of the vehicle mileage meter sensor in the design and production processes respectively.
The basic test comprises appearance check and output signal characteristic test:
a. and (3) appearance inspection: under the uniform illumination of 300Lx and the mesh distance of 630mm, checking whether the external surface of the vehicle mileage instrument sensor has scratches, deformation and cracks or not, and whether the joint part of the vehicle mileage instrument sensor has sharp-angled burrs or not, and if the external surface of the vehicle mileage instrument sensor does not have scratches, deformation and cracks or the joint part of the vehicle mileage instrument sensor does not have sharp-angled burrs, checking the appearance to be qualified;
if the outer surface of the vehicle mileage meter sensor has scratches, deformation or cracks, the appearance inspection is unqualified, and meanwhile, if the joint part of the vehicle mileage meter sensor has sharp-angled burrs, the appearance inspection is unqualified;
b. and (3) output signal characteristic test: installing a vehicle mileage instrument sensor sample to be tested on a test bed, enabling the vehicle mileage instrument sensor to work under a rated voltage, detecting an output signal of the vehicle mileage instrument sensor by using an oscilloscope, and if the output signal of the vehicle mileage instrument sensor sample is normal, testing the characteristic of the output signal to be qualified; if the output signal of the vehicle mileage meter sensor sample is abnormal, the output signal characteristic test is unqualified;
if the appearance inspection of one vehicle mileage meter sensor sample is qualified and the output signal characteristic test is qualified, the basic test result of the vehicle mileage meter sensor sample is qualified; if any one of the appearance inspection and the output signal characteristic test of one vehicle mileage meter sensor sample is unqualified, the basic test result of the vehicle mileage meter sensor sample is unqualified;
the appearance inspection and the output signal characteristic test are both carried out in a standard environment, and the standard environment simultaneously satisfies the following three conditions:
a. the temperature is 15-30 ℃;
b. humidity: 40% -85%;
c. air pressure: 85kPa to 105 kPa.
Example 2:
example 2 is substantially the same as example 1 except that:
the temperature influence test comprises a high temperature test, a low temperature test and a temperature resistance test, wherein the high temperature test comprises the following steps:
a1, putting the vehicle mileage meter sensor sample into a high-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to 120 +/-2 ℃, placing the vehicle mileage meter sensor sample in the high-temperature box at 120 +/-2 ℃ for 8 hours, and then taking the vehicle mileage meter sensor sample out of the high-temperature box and placing the vehicle mileage meter sensor sample in a standard environment for at least 5 hours;
a2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the high-temperature tests of the vehicle mileage instrument sensor are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the high temperature test of the vehicle mileage meter sensor sample is unqualified;
the low temperature test comprises the following steps:
b1, putting the vehicle odometer sensor sample into a low-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to minus 40 +/-3 ℃, taking out the vehicle odometer sensor sample after 8 hours, and then placing the vehicle odometer sensor sample in a standard environment for at least 4 hours;
b2, performing B and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the low-temperature tests of the vehicle mileage instrument sensor sample are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the low temperature test of the vehicle mileage meter sensor sample is unqualified;
the temperature resistance test comprises the following steps:
c1, exposing the sample of the vehicle odometer sensor which is not in the working state to high temperature of 70 ℃ for 1440 minutes, and then exposing the sample of the vehicle odometer sensor to low temperature of-15 ℃ for 1440 minutes;
c2, repeating the steps in C1 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the temperature resistance tests of the vehicle mileage instrument sensor sample are qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the temperature resistance test of the vehicle mileage meter sensor sample is unqualified;
if the high-temperature test, the low-temperature test and the temperature resistance test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; if any one of the high-temperature test, the low-temperature test and the temperature resistance test of one vehicle mileage meter sensor sample is unqualified, the temperature influence test result of the vehicle mileage meter sensor sample is unqualified;
the voltage test comprises the following steps: voltage influence test, power supply reverse connection test and overvoltage test; the voltage influence test comprises the following steps:
d1, mounting the vehicle mileage meter sensor sample on a test bed, and enabling the vehicle mileage meter sensor sample to be in a working state;
d2, slowly increasing the voltage of the vehicle odometer sensor sample to the highest working voltage, enabling the vehicle odometer sensor sample to run for 1.5 minutes under the highest working allowable voltage, and then slowly decreasing the voltage of the vehicle odometer sensor sample to the lowest working voltage, and enabling the vehicle odometer sensor sample to run for 1.5 minutes under the lowest working voltage;
d3, repeating the steps in D2 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the vehicle mileage instrument sensor sample voltage influences the tests to be qualified; if the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the influence of the voltage of the vehicle mileage meter sensor sample on the test is unqualified;
the time for slowly increasing the voltage of the sample connected to the vehicle odometer sensor to the highest working voltage in the D2 is not less than 10 seconds; in the step C2, the time for slowly reducing the voltage of the sample connected to the vehicle odometer sensor to the lowest working voltage is not less than 10 seconds;
the power supply reverse connection test comprises the following steps:
e1, mounting the vehicle odometer sensor sample on a test bed, and reversely connecting the positive electrode and the negative electrode of the vehicle odometer sensor sample in a circuit;
e2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample power supply reversal test is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the reverse connection test of the vehicle mileage meter sensor sample power supply is not qualified;
the overvoltage test comprises the following steps:
f1, mounting the vehicle odometer sensor sample on a test bed, and connecting a power supply with the voltage higher than the rated voltage of the vehicle odometer sensor to the positive electrode and the negative electrode of the vehicle odometer sensor sample;
f2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample is qualified in an overvoltage test; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the vehicle mileage meter sensor sample is not qualified in the overvoltage test;
if the voltage influence test, the power supply reverse connection test and the overvoltage test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; if any one of the voltage influence test, the power supply reverse connection test and the overvoltage test of one vehicle mileage meter sensor sample is unqualified, the voltage test result of the vehicle mileage meter sensor sample is unqualified;
the insulation and voltage resistance test comprises the following steps:
g1, applying a test voltage which is not more than half of the set voltage between the shell of the sensor sample and an ungrounded instrument circuit system, uniformly and slowly increasing the test voltage until the test voltage is equal to the set voltage, then maintaining the test voltage unchanged, and slowly decreasing the test voltage until the test voltage is zero after 1 minute;
if the vehicle mileage instrument sensor sample generates electric leakage in the process, the result of the insulation voltage withstand test of the vehicle mileage instrument sensor sample is unqualified; if the vehicle mileage meter sensor sample does not leak electricity in the process, entering the next step;
g2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the insulation voltage resistance test result of the vehicle mileage instrument sensor sample is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the insulation withstand voltage test result of the vehicle mileage meter sensor sample is unqualified;
the time for applying the voltage in the rising process is not less than 10 seconds, the time for applying the voltage in the falling process is not less than 10 seconds, and the set voltage is a sinusoidal alternating voltage with the peak value of 550V and the frequency of 50 Hz;
the salt spray resistance test is carried out according to the requirements of GB/T2423.17;
the power line conductive coupling anti-interference test is carried out according to the requirements in GB/T21437.2;
the dustproof and waterproof test is carried out according to the requirements in GB/T4942.1;
the vibration test is carried out according to the requirements in GB/T2423.58;
the impact test was carried out according to the requirements in GB/T2423.55.
Example 3:
example 3 is substantially the same as example 2 except that:
the industrial solvent resistance test comprises the following steps:
h1, respectively using five industrial solvents of gear oil, gearbox lubricating oil, diesel oil, gasoline or snow melt agent to sequentially perform an industrial solvent resistance test on the same vehicle odometer sensor sample:
dripping a small amount of industrial solvent on the surface of the vehicle odometry instrument sensor sample under the condition that the vehicle odometry instrument sensor sample does not work, standing the vehicle odometry instrument sensor sample for 4 hours, and then removing the industrial solvent on the surface of the vehicle odometry instrument sensor sample;
h2, checking whether the surface coating of the vehicle mileage meter sensor sample is rusted, and performing b, output signal characteristic test in the basic test on the vehicle mileage meter sensor sample;
if the surface coating of the vehicle mileage meter sensor sample is not rusted and the output signal characteristic of the vehicle mileage meter sensor sample is qualified in the test, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is qualified; if the surface coating of the vehicle mileage meter sensor sample is corroded or the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is unqualified;
the high-temperature high-pressure durability test comprises the following steps:
i1, placing the vehicle mileage meter sensor sample in an environment where lubricating oil splashes randomly for 400 hours under the condition that the vehicle mileage meter sensor sample does not work, wherein the temperature of the randomly splashed lubricating oil is 120 ℃, and the pressure of the randomly splashed lubricating oil is 49.9 Kpa;
i2, performing basic test on the vehicle mileage meter sensor sample, and checking whether the surface coating of the vehicle mileage meter sensor sample is rusted;
if the basic test result of the vehicle mileage meter sensor sample is qualified and the surface coating of the vehicle mileage meter sensor sample is not rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is qualified; and if the basic test result of the vehicle mileage meter sensor sample is unqualified or the surface coating of the vehicle mileage meter sensor sample is rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is unqualified.
The durability test comprises the following steps: mounting a vehicle mileage meter sensor sample on a test bed, and continuously operating the vehicle mileage meter sensor for 360 hours under rated voltage;
if the vehicle mileage meter sensor sample does not fail after continuously running for 360 hours, the result of the durability test of the vehicle mileage meter sensor sample is qualified; and if the sample of the vehicle mileage meter sensor fails in continuous operation, the result of the durability test of the sample of the vehicle mileage meter sensor is unqualified.

Claims (9)

1. A pulse non-contact vehicle mileage meter sensor acceptance method is characterized in that:
the acceptance method comprises the following steps:
s1, after the vehicle mileage meter sensor is designed and put into production, randomly drawing 10 vehicle mileage meter sensor samples from the same batch of products;
s2, performing basic test on all 10 vehicle mileage meter sensor samples, and recording the test process and results;
s3, dividing the 10 vehicle odometer sensor samples into a first sample group and a second sample group, wherein each of the first sample group and the second sample group comprises 5 vehicle odometer sensor samples;
s4, sequentially carrying out temperature influence test, voltage test, power line conductive coupling anti-interference test, vibration test, insulation pressure resistance test, dust and water prevention test, industrial solvent resistance test, durability test at high temperature and high pressure and impact test on the vehicle mileage meter sensor samples in the first sample group, and recording the test process and results;
meanwhile, performing a salt spray resistance test on the vehicle mileage meter sensor sample in the second sample group, and recording the test process and the test result;
s5, after the test is finished, summarizing the test process and the test result, and making a detection report:
if the test results of the basic tests of the 10 vehicle mileage instrument sensor samples in the S2 are all qualified, the test results of the samples in the first sample group in the S4 in the temperature influence test, the voltage test, the power line conduction coupling anti-interference test, the vibration test, the insulation pressure resistance test, the dust-proof and water-proof test, the industrial solvent resistance test, the durability test, the high-temperature and high-pressure durability test and the impact test are all qualified, and the test results of the samples in the second sample group in the S4 in the salt mist resistance test are all qualified, the vehicle mileage instrument sensor product in the batch is qualified and accepted, and the vehicle mileage instrument sensor can enter the formal production flow;
if the vehicle mileage meter sensor sample is unqualified in any test result, the vehicle mileage meter sensor products of the batch are unqualified, a detection report is sent to a design part and a production part, and the design part and the production part analyze the defects of the vehicle mileage meter sensor in the design and production processes respectively.
2. The method of claim 1, wherein the method comprises the steps of:
the basic test comprises appearance check and output signal characteristic test:
a. and (3) appearance inspection: under the uniform illumination of 300Lx and the mesh distance of 630mm, checking whether the external surface of the vehicle mileage instrument sensor has scratches, deformation and cracks or not, and whether the joint part of the vehicle mileage instrument sensor has sharp-angled burrs or not, and if the external surface of the vehicle mileage instrument sensor does not have scratches, deformation and cracks or the joint part of the vehicle mileage instrument sensor does not have sharp-angled burrs, checking the appearance to be qualified;
if the outer surface of the vehicle mileage meter sensor has scratches, deformation or cracks, the appearance inspection is unqualified, and meanwhile, if the joint part of the vehicle mileage meter sensor has sharp-angled burrs, the appearance inspection is unqualified;
b. and (3) output signal characteristic test: installing a vehicle mileage instrument sensor sample to be tested on a test bed, enabling the vehicle mileage instrument sensor to work under a rated voltage, detecting an output signal of the vehicle mileage instrument sensor by using an oscilloscope, and if the output signal of the vehicle mileage instrument sensor sample is normal, testing the characteristic of the output signal to be qualified; if the output signal of the vehicle mileage meter sensor sample is abnormal, the output signal characteristic test is unqualified;
if the appearance inspection of one vehicle mileage meter sensor sample is qualified and the output signal characteristic test is qualified, the basic test result of the vehicle mileage meter sensor sample is qualified; if any one of the appearance inspection and the output signal characteristic test of one vehicle mileage meter sensor sample is unqualified, the basic test result of the vehicle mileage meter sensor sample is unqualified;
the appearance inspection and the output signal characteristic test are both carried out in a standard environment, and the standard environment simultaneously satisfies the following three conditions:
a. the temperature is 15-30 ℃;
b. humidity: 40% -85%;
c. air pressure: 85kPa to 105 kPa.
3. The method of claim 2, wherein the step of verifying the pulse non-contact vehicle odometer sensor comprises the steps of:
the temperature influence test comprises a high temperature test, a low temperature test and a temperature resistance test, wherein the high temperature test comprises the following steps:
a1, putting the vehicle mileage meter sensor sample into a high-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to 120 +/-2 ℃, placing the vehicle mileage meter sensor sample in the high-temperature box at 120 +/-2 ℃ for 8 hours, and then taking the vehicle mileage meter sensor sample out of the high-temperature box and placing the vehicle mileage meter sensor sample in a standard environment for at least 5 hours;
a2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the high-temperature tests of the vehicle mileage instrument sensor are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the high temperature test of the vehicle mileage meter sensor sample is unqualified;
the low temperature test comprises the following steps:
b1, putting the vehicle odometer sensor sample into a low-temperature box under the condition of no work, adjusting the temperature in the high-temperature box to minus 40 +/-3 ℃, taking out the vehicle odometer sensor sample after 8 hours, and then placing the vehicle odometer sensor sample in a standard environment for at least 4 hours;
b2, performing B and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the low-temperature tests of the vehicle mileage instrument sensor sample are qualified;
if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the low temperature test of the vehicle mileage meter sensor sample is unqualified;
the temperature resistance test comprises the following steps:
c1, exposing the sample of the vehicle odometer sensor which is not in the working state to high temperature of 70 ℃ for 1440 minutes, and then exposing the sample of the vehicle odometer sensor to low temperature of-15 ℃ for 1440 minutes;
c2, repeating the steps in C1 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the temperature resistance tests of the vehicle mileage instrument sensor sample are qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the temperature resistance test of the vehicle mileage meter sensor sample is unqualified;
if the high-temperature test, the low-temperature test and the temperature resistance test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; and if any one of the high-temperature test, the low-temperature test and the temperature resistance test of the vehicle mileage meter sensor sample is unqualified, the temperature influence test result of the vehicle mileage meter sensor sample is unqualified.
4. The method of claim 2, wherein the step of verifying the pulse non-contact vehicle odometer sensor comprises the steps of:
the voltage test comprises the following steps: voltage influence test, power supply reverse connection test and overvoltage test; the voltage influence test comprises the following steps:
d1, mounting the vehicle mileage meter sensor sample on a test bed, and enabling the vehicle mileage meter sensor sample to be in a working state;
d2, slowly increasing the voltage of the vehicle odometer sensor sample to the highest working voltage, enabling the vehicle odometer sensor sample to run for 1.5 minutes under the highest working allowable voltage, and then slowly decreasing the voltage of the vehicle odometer sensor sample to the lowest working voltage, and enabling the vehicle odometer sensor sample to run for 1.5 minutes under the lowest working voltage;
d3, repeating the steps in D2 for 10 times, then performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, and if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, determining that the vehicle mileage instrument sensor sample voltage influences the tests to be qualified; if the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the influence of the voltage of the vehicle mileage meter sensor sample on the test is unqualified;
the time for slowly increasing the voltage of the sample connected to the vehicle odometer sensor to the highest working voltage in the D2 is not less than 10 seconds; in the step C2, the time for slowly reducing the voltage of the sample connected to the vehicle odometer sensor to the lowest working voltage is not less than 10 seconds;
the power supply reverse connection test comprises the following steps:
e1, mounting the vehicle odometer sensor sample on a test bed, and reversely connecting the positive electrode and the negative electrode of the vehicle odometer sensor sample in a circuit;
e2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample power supply reversal test is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the reverse connection test of the vehicle mileage meter sensor sample power supply is not qualified;
the overvoltage test comprises the following steps:
f1, mounting the vehicle odometer sensor sample on a test bed, and connecting a power supply with the voltage higher than the rated voltage of the vehicle odometer sensor to the positive electrode and the negative electrode of the vehicle odometer sensor sample;
f2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the vehicle mileage instrument sensor sample is qualified in an overvoltage test; if the output signal characteristic test of the vehicle mileage meter sensor sample is not qualified, the vehicle mileage meter sensor sample is not qualified in the overvoltage test;
if the voltage influence test, the power supply reverse connection test and the overvoltage test of one vehicle mileage instrument sensor sample are qualified, the voltage test result of the vehicle mileage instrument sensor sample is qualified; and if any one of the voltage influence test, the power supply reverse connection test and the overvoltage test of the sample of the vehicle mileage meter sensor is unqualified, the voltage test result of the sample of the vehicle mileage meter sensor is unqualified.
5. The method of claim 2, wherein the step of verifying the pulse non-contact vehicle odometer sensor comprises the steps of:
the insulation and voltage resistance test comprises the following steps:
g1, applying a test voltage which is not more than half of the set voltage between the shell of the sensor sample and the ungrounded instrument circuit system, uniformly and slowly increasing the test voltage until the test voltage is equal to the set voltage, then maintaining the test voltage unchanged, and slowly decreasing the test voltage until the test voltage is zero after 1 minute;
if the vehicle mileage instrument sensor sample generates electric leakage in the process, the result of the insulation voltage withstand test of the vehicle mileage instrument sensor sample is unqualified; if the vehicle mileage meter sensor sample does not leak electricity in the process, entering the next step;
g2, performing b and output signal characteristic tests in basic tests on the vehicle mileage instrument sensor sample, wherein if the output signal characteristic tests of the vehicle mileage instrument sensor sample are qualified, the insulation voltage resistance test result of the vehicle mileage instrument sensor sample is qualified; if the output signal characteristic test of the vehicle mileage meter sensor sample is unqualified, the insulation withstand voltage test result of the vehicle mileage meter sensor sample is unqualified;
the time for applying the voltage in the rising process is not less than 10 seconds, the time for applying the voltage in the falling process is not less than 10 seconds, and the set voltage is a sinusoidal alternating voltage with the peak value of 550V and the frequency of 50 Hz.
6. The method of any one of claims 1-5, wherein the method comprises:
the industrial solvent resistance test comprises the following steps:
h1, respectively using five industrial solvents of gear oil, gearbox lubricating oil, diesel oil, gasoline or snow melt agent to sequentially perform an industrial solvent resistance test on the same vehicle odometer sensor sample:
dripping a small amount of industrial solvent on the surface of the vehicle odometry instrument sensor sample under the condition that the vehicle odometry instrument sensor sample does not work, standing the vehicle odometry instrument sensor sample for 4 hours, and then removing the industrial solvent on the surface of the vehicle odometry instrument sensor sample;
h2, checking whether the surface coating of the vehicle mileage meter sensor sample is rusted, and performing b, output signal characteristic test in the basic test on the vehicle mileage meter sensor sample;
if the surface coating of the vehicle mileage meter sensor sample is not rusted and the output signal characteristic of the vehicle mileage meter sensor sample is qualified in the test, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is qualified; and if the surface coating of the vehicle mileage meter sensor sample is rusted or the output signal characteristic of the vehicle mileage meter sensor sample is unqualified, the result of the industrial solvent resistance test of the vehicle mileage meter sensor sample is unqualified.
7. The method of claim 6, wherein the step of verifying the pulse non-contact vehicle odometer sensor comprises the steps of:
the high-temperature high-pressure durability test comprises the following steps:
i1, placing the vehicle mileage meter sensor sample in an environment where lubricating oil splashes randomly for 400 hours under the condition that the vehicle mileage meter sensor sample does not work, wherein the temperature of the randomly splashed lubricating oil is 120 ℃, and the pressure of the randomly splashed lubricating oil is 49.9 Kpa;
i2, performing basic test on the vehicle mileage meter sensor sample, and checking whether the surface coating of the vehicle mileage meter sensor sample is rusted;
if the basic test result of the vehicle mileage meter sensor sample is qualified and the surface coating of the vehicle mileage meter sensor sample is not rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is qualified; and if the basic test result of the vehicle mileage meter sensor sample is unqualified or the surface coating of the vehicle mileage meter sensor sample is rusted, the high-temperature and high-pressure durability test result of the vehicle mileage meter sensor sample is unqualified.
8. The method of claim 7, wherein the step of verifying the pulse non-contact vehicle odometer sensor comprises the steps of:
the durability test comprises the following steps: mounting a vehicle mileage meter sensor sample on a test bed, and continuously operating the vehicle mileage meter sensor for 360 hours under rated voltage;
if the vehicle mileage meter sensor sample does not fail after continuously running for 360 hours, the result of the durability test of the vehicle mileage meter sensor sample is qualified; and if the sample of the vehicle mileage meter sensor fails in continuous operation, the result of the durability test of the sample of the vehicle mileage meter sensor is unqualified.
9. The method of claim 8, wherein the step of verifying the pulse non-contact vehicle odometer sensor comprises the steps of:
the salt spray resistance test is carried out according to the requirements of GB/T2423.17;
the power line conductive coupling anti-interference test is carried out according to the requirements in GB/T21437.2;
the dustproof and waterproof test is carried out according to the requirements in GB/T4942.1;
the vibration test is carried out according to the requirements in GB/T2423.58;
the impact test was carried out according to the requirements in GB/T2423.55.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027640A (en) * 1989-11-14 1991-07-02 Hugh D. Hinckley Speedometer/odometer/cruise control tester and related methods
US5040407A (en) * 1989-11-14 1991-08-20 Hugh D. Hinckley Speedometer/odometer/cruise control tester and related methods
CN201302454Y (en) * 2008-09-17 2009-09-02 上海耀通电子仪表有限公司 Testing device for electronic odometer
CN102539310A (en) * 2011-12-15 2012-07-04 广东工业大学 Method for atmospheric exposure test for photovoltaic cable
CN106291437A (en) * 2015-05-21 2017-01-04 中国电力科学研究院 A kind of method for evaluating reliability of intelligent electric energy meter
CN108152703A (en) * 2017-11-16 2018-06-12 中国电器科学研究院有限公司 A kind of test method for evaluating circuit board environment durability
CN110220535A (en) * 2019-05-29 2019-09-10 中国第一汽车股份有限公司 Vehicle instrument table test method, device, system, equipment and storage medium
CN209894469U (en) * 2019-06-19 2020-01-03 芜湖天恒科技开发有限公司 Electronic type automobile instrument comprehensive durability experiment table
CN112945276A (en) * 2021-02-06 2021-06-11 南京工业职业技术大学 Automatic power supply environment and functional performance testing device for subway vehicle electronic odometer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027640A (en) * 1989-11-14 1991-07-02 Hugh D. Hinckley Speedometer/odometer/cruise control tester and related methods
US5040407A (en) * 1989-11-14 1991-08-20 Hugh D. Hinckley Speedometer/odometer/cruise control tester and related methods
CN201302454Y (en) * 2008-09-17 2009-09-02 上海耀通电子仪表有限公司 Testing device for electronic odometer
CN102539310A (en) * 2011-12-15 2012-07-04 广东工业大学 Method for atmospheric exposure test for photovoltaic cable
CN106291437A (en) * 2015-05-21 2017-01-04 中国电力科学研究院 A kind of method for evaluating reliability of intelligent electric energy meter
CN108152703A (en) * 2017-11-16 2018-06-12 中国电器科学研究院有限公司 A kind of test method for evaluating circuit board environment durability
CN110220535A (en) * 2019-05-29 2019-09-10 中国第一汽车股份有限公司 Vehicle instrument table test method, device, system, equipment and storage medium
CN209894469U (en) * 2019-06-19 2020-01-03 芜湖天恒科技开发有限公司 Electronic type automobile instrument comprehensive durability experiment table
CN112945276A (en) * 2021-02-06 2021-06-11 南京工业职业技术大学 Automatic power supply environment and functional performance testing device for subway vehicle electronic odometer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
余淼等: "汽车发动机ECU环境耐久性测试原理与实现", 汽车工程 *
黄喜亮;: "关于自动化仪表型式检验测试探讨", 电子世界 *

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