Internal thread detection method and system based on machine vision

A technology of machine vision and detection methods, applied in instruments, measuring devices, optical devices, etc., can solve the problems of limited size range of laser vision equipment, inability to obtain detection results at one time, and high cost of replacement of detection systems, and achieve a reasonable detection method. The effect of simplicity, guaranteed detection quality and strong operability

Active Publication Date: 2019-02-15
CSIC PRIDENANJINGINTELLIGENT EQUIP SYST CO LTD
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Problems solved by technology

This detection method is limited to the positioning method of the detection tool, so that the detection items need to be carried out one by one, and the detection results of the above-mentioned thread detection items cannot be obtained at one time, and the efficiency is low; The size range of eddy current physical instruments and laser vision equipment restricts the detection capabilities of the instruments; when the product is changed, the flexibility of the detection tooling is poor, and the replacement cost of the detection system is high

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  • Internal thread detection method and system based on machine vision
  • Internal thread detection method and system based on machine vision
  • Internal thread detection method and system based on machine vision

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Embodiment Construction

[0034] The technical solution of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0035] This embodiment takes the detection of a through-hole internal thread workpiece with a length of 20mm as an example of M8X1, and the specific implementation steps are as follows:

[0036] First, build an optical detection system, such as figure 1 Shown: an internal thread detection system based on machine vision, including: positioning tool 4, light source 3, industrial camera 1, host computer 5, the right side of the positioning tool 4 is provided with a light source 3, and the left side is provided with an industrial camera 1, so The industrial camera 1 is connected with the upper computer 5 through the data line 6; the positioning tool 4 is provided with a positioning structure to ensure that the distance between the threaded port of each internally threaded workpiece 2 to be detected and the lens of the...

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Abstract

The invention discloses an internal thread detection method and system based on machine vision. The method and the system obtain a complete image of the internal thread through an industrial camera, upload the image data to an upper computer, and complete the internal thread parameter detection by running a detection algorithm in the upper computer. Multiple detection items such as internal threadparameter detection, central offset judgment, coarse tooth / fine tooth distinguishing and the like can be completed by one-time imaging. The detection method of the invention is reasonable and simple,has high operability and detection efficiency, the detection quality is guaranteed; the detection system is high in flexibility, low in cost and suitable for wide popularization and application.

Description

technical field [0001] The invention relates to the technical field of internal thread detection methods and systems, in particular to a machine vision-based internal thread detection method and system. Background technique [0002] The detection of internal threads involves multiple detection items such as internal thread parameter detection, center offset detection, and distinction between coarse and fine threads. At present, in the automated production line, for the above-mentioned testing items, the known method is to configure the testing tooling on the production line in conjunction with thread plug gauges, eddy current physical instruments, and laser vision equipment to form a testing system for targeted differential testing. This detection method is limited to the positioning method of the detection tool, so that the detection items need to be carried out one by one, and the detection results of the above-mentioned thread detection items cannot be obtained at one tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01B11/14G01B11/12
CPCG01B11/12G01B11/14G01B11/2425
Inventor 张峰张瑞汤杰
Owner CSIC PRIDENANJINGINTELLIGENT EQUIP SYST CO LTD
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