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Online detection method of parallelism of spring by machine vision system

A machine vision system and detection method technology, applied in instruments, measuring devices, optical devices, etc., can solve the problems of low monitoring speed, high labor intensity, inability to guarantee product qualification rate detection quality, etc., to prolong production time, improve Utilization rate, the effect of reducing the labor intensity of testing

Inactive Publication Date: 2010-06-09
WUXI ZHONGWANG 4D TECH
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Problems solved by technology

[0004] Aiming at the problems that the online detection of spring parallelism in the prior art relies on manual detection, workers are prone to visual fatigue, the labor intensity is high, the product qualification rate and detection quality cannot be guaranteed, and the monitoring speed is low. The present invention provides a machine vision system for The online detection method of spring parallelism greatly reduces the labor intensity of workers' detection, with high detection accuracy and fast speed, which can effectively ensure the qualified rate of manufactured products

Method used

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  • Online detection method of parallelism of spring by machine vision system
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  • Online detection method of parallelism of spring by machine vision system

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment one, to the detection of qualified product:

[0033] Such as figure 1 The side image of the spring is shown, where the angle between the X axis and the upper boundary of the spring is parallel to the indicated area.

[0034] Fix the Beijing Weishi 1300UM industrial camera directly above the spring detection and conveying device, the distance between the camera and the side of the spring is 30cm, use the 8mm COMPUTAR lens, adjust the aperture to the maximum value, and adjust the exposure time to 0.58ms. The angle detection accuracy is set to 1°, and the normal parallelism of qualified products is set to 0°~10°. A special red LED backlight is used to illuminate from directly below the spring, and a semi-closed metal frame is used to obtain a relatively stable visual image, reflecting the obvious characteristics of the side of the spring. The power supply of the display light source is constant voltage and constant current, which is a stable light source witho...

Embodiment 2

[0039] Embodiment two, to the detection of waste product:

[0040] Such as figure 2 The side image of the spring is shown, where the angle between the X axis and the upper boundary of the spring is parallel to the indicated area.

[0041] Fix the Beijing Weishi 1300UM industrial camera directly above the spring detection and conveying device, the distance between the camera and the side of the spring is 30cm, use an 8mm COMPUTAR lens, adjust the aperture to 1 / 3 position, adjust the exposure time to 1ms, and set the arc detection accuracy When it is 1°, set the normal radian of the qualified product as 0°~10°, obtain the side image of the spring during the detection process, and calculate the parallelism value in the side image of the spring.

[0042] The rest of the operating steps of the detection example are the same as those of Example 1.

[0043] If the detected angle value is 12°, then the product is a waste product. The computer prompts the unqualified products in th...

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Abstract

The invention discloses a method for online detecting the parallelism of a spring by a machine vision system. The spring parallelism is arranged to a detection parameter; the detection precision and qualified range of the detection parameter are set according to the requirement of users; external trigger and control signals start the camera to shoot an image of the side face of the on-line operation spring in real time, and transmit the shot image to a computer for detecting; the computer processes the image through an image algorithm, extracts the image of the side surface of the spring, calculates a D-value angle of an included angle of the upper edge line and the lower edge line of the spring and the standard right angle (90 degrees), and judges whether the product is qualified or waste; and the external trigger and control signals sort out the two kinds of products from different discharge holes. The method of the invention has high precision and high speed to detect the spring parallelism, and can effectively ensure the qualified rate of the product.

Description

technical field [0001] The invention relates to the technical field of on-line detection by using a machine vision system, in particular to a method for on-line detection of spring parallelism by using a machine vision system at a spring production site. Background technique [0002] In the spring production workshop of the assembly line, the parallelism of the spring needs to be checked online. In the prior art, the on-line detection of spring parallelism relies on manual detection, and 5 to 6 people are set up next to the spring production machine to carry out visual inspection and processing of spring parallelism, and the detection results are classified as qualified products (such as the parallel angle is 0~ 10°) and unqualified products (such as ≥10°), springs with greater than qualified precision are directly treated as waste products. [0003] The disadvantages of manual inspection mainly include: the production workshop is dusty and noisy, and the working environmen...

Claims

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Application Information

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IPC IPC(8): G01B11/26B07C5/10
Inventor 董仲伟
Owner WUXI ZHONGWANG 4D TECH
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