Automobile door lock riveting point height measuring system and method based on displacement sensor

A technology of displacement sensor and car door lock, applied in the field of car door lock rivet point height measurement system, can solve the problems of inaccurate rivet point height measurement, easy visual fatigue, high labor cost, and achieve good repeatable measurement accuracy and anti-interference ability. Strong and efficient effect

Active Publication Date: 2021-07-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of low efficiency, easy visual fatigue, high labor cost, and inaccurate measurement of the riveting point height caused by oil contamination in the existing detection method of the height of the riveting point of the door lock in the manufacturing process of the automobile door lock, and provides a displacement-based Automobile door lock riveting point height measurement system and method based on sensor

Method used

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  • Automobile door lock riveting point height measuring system and method based on displacement sensor
  • Automobile door lock riveting point height measuring system and method based on displacement sensor
  • Automobile door lock riveting point height measuring system and method based on displacement sensor

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Embodiment 1

[0044] This embodiment provides a displacement sensor-based automotive door lock riveting point height measurement system, such as figure 2 As shown, it includes a cylinder, a programmable sequence control card, a displacement sensor, a data acquisition card and an industrial computer. The programmable sequence control card is used to control the cylinder to push the displacement sensor to contact the automobile door lock, and the displacement sensor is used to lock the automobile door The displacement value output between the lock and the displacement sensor is an analog signal, the data acquisition card is used to convert the analog signal output by the displacement sensor into a voltage digital signal, and the industrial computer is used to process the voltage converted by the data acquisition card The digital signal judges whether the riveting point of the car door lock is qualified, and the judgment result is displayed and output to the programmable sequence control card....

Embodiment 2

[0049] This embodiment provides a method for measuring the height of the riveting point of an automobile door lock based on a displacement sensor. The method is measured using the system for measuring the height of the riveting point of an automobile door lock based on a displacement sensor provided in Embodiment 1, and specifically includes the following steps:

[0050] Step 1: Calibrate the displacement sensor and find the relationship between the actual output voltage of the displacement sensor and the compression value, which specifically includes the following process:

[0051] Fix the single displacement sensor to be calibrated vertically on the bracket, place a marble platform directly below the displacement sensor, and pre-compress the displacement sensor 1-2mm on the marble platform, record the initial voltage V0 of the displacement sensor at this time; 1mm, 2mm, ..., 22mm, a total of 22 sets of standard height gauge blocks with a step length of 1mm, and a total of 23 ...

Embodiment 3

[0085] In order to verify the measurement accuracy of the method for measuring the height of the riveting point of the automobile door lock based on the displacement sensor provided in Embodiment 2, the present embodiment carries out the following tests:

[0086] (1) After correcting the sensor error and eliminating the system error according to the embodiment 2, measure the height of 3 riveting points at the same position on the same door lock, repeat the measurement of 10 sets of data, perform multiple tests and analyze the repeated measurement accuracy, and the test results As shown in table 2:

[0087] Table 2 Repeated measurement accuracy test data

[0088]

[0089] The maximum deviation between the measured heights of the three riveting points and the average height is 0.010mm, and the repeated measurement accuracy of the three measurements can be calculated to be 0.006mm, and the repeated measurement accuracy is within 0.01mm, which meets the detection accuracy requi...

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Abstract

The invention discloses an automobile door lock riveting point height measuring system and method based on a displacement sensor, and belongs to the technical field of automatic measurement. The system comprises an air cylinder, a programmable sequence control card, a displacement sensor, a data acquisition card and an industrial computer. The programmable sequence control card is used for controlling the air cylinder to push the displacement sensor to make contact with an automobile door lock. The displacement sensor is used for outputting a displacement value between the automobile door lock and the displacement sensor as an analog quantity signal. The data acquisition card is used for converting the analog quantity signal output by the displacement sensor into a voltage digital quantity signal. The industrial computer is used for processing the voltage digital quantity signal converted by the data acquisition card to judge whether the riveting point of the automobile door lock is qualified or not and displaying a judgment result. The system and the method are high in detection speed, have good repeated measurement precision, avoid personal errors caused by manual measurement, and are high in operation efficiency, strong in anti-interference capability and high in accuracy.

Description

technical field [0001] The invention relates to a displacement sensor-based system and method for measuring the height of riveting points of automobile door locks, belonging to the technical field of automatic measurement. Background technique [0002] The car door lock is one of the essential components in the car safety system, it plays an important role and is widely used. Its appearance is as follows: figure 1 shown. In the production and assembly process of automobile door locks, the height detection of riveting points is an important process of assembly quality inspection. The traditional inspection method relies on manual measurement using micrometers, plug gauges and other measuring tools. This inspection method has disadvantages such as low efficiency, easy visual fatigue, and high labor costs. It can no longer meet the needs of production. Therefore, a set of car door lock riveting points was invented Highly automatic detection system is very necessary. [0003...

Claims

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Application Information

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IPC IPC(8): G01B7/06
CPCG01B7/06
Inventor 吴静静勒系遥
Owner JIANGNAN UNIV
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