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Aviation electric connector pin position deviation detection method

An electrical connector and deviation detection technology, which is applied in the field of position deviation detection of aviation electrical connector pins, can solve the problems of low pin insertion efficiency and easy missed detection, achieve low missed detection rate, reduce missed detection rate, and facilitate reference Effect

Inactive Publication Date: 2017-03-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low efficiency and easy missed detection in the existing manual detection of electrical connector pins, and propose a method for detecting position deviation of aviation electrical connector pins

Method used

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  • Aviation electric connector pin position deviation detection method
  • Aviation electric connector pin position deviation detection method
  • Aviation electric connector pin position deviation detection method

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Experimental program
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specific Embodiment approach 1

[0034] The method for detecting the position deviation of the pin position of the aviation electrical connector in this embodiment is realized by the following steps:

[0035] Step 1. According to the different diameters of the aviation electrical connector pins, make a single pin image of different specifications as a pin template image;

[0036] Step 2, obtaining the image of the pins of the electrical connector through the image acquisition system;

[0037] Step 3. Perform image preprocessing of electrical connector pins, retain the region of interest with pin images, and filter out background interference at the same time to prevent the background image from interfering with the extraction of pins; use the custom pin template image in step 1 Perform template matching on the pin image of the electrical connector to obtain the best matching point, and use the coordinates of the obtained best matching point as the approximate position of the pin;

[0038] Step 4. Search arou...

specific Embodiment approach 2

[0042] The difference from Embodiment 1 is that in the method for detecting the position deviation of the pin position of the aviation electrical connector in this embodiment, the process of obtaining the image of the pins of the electrical connector through the image acquisition system in step 2 is that the image acquisition system adopts a ring The light source performs high-angle forward lighting. The light emitted by the ring light source and irradiated on the pin to be tested is at an angle of 60° to the horizontal plane. The 500w pixel industrial camera lens is set directly above the connector to be tested to collect its image , and then calculate the resolution of the industrial camera in the horizontal and vertical directions to meet the minimum resolution requirements for the image acquisition system to obtain the image of the electrical connector pin:

[0043] Horizontal Resolution = Horizontal Field of View Size ÷ Minimum Accuracy (3-1)

[0044] Vertical resolution ...

specific Embodiment approach 3

[0060] The difference from the specific embodiment 1 or 2 is that in the method for detecting the position deviation of the pins of the aeronautical electrical connector in this embodiment, the image preprocessing of the electrical connector pins described in step 3 is carried out, and the region of interest with the pin image is retained , and the process of filtering background interference is to extract the pin position coordinates in the image through the image processing technology of image segmentation and image feature extraction, and obtain the pin coordinates in the image coordinate system:

[0061] First, the image of the electrical connector is preprocessed to remove images of structures other than the electrical connector. The processing results are as follows image 3 shown;

[0062] Then, but the edge of the electrical connector is very bright, it is easy to cause mis-matching of the pins, continue to filter out the image outside the circular edge of the electric...

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Abstract

The invention discloses an aviation electric connector pin position deviation detection method and belongs to the field of machine vision high-precision detection, for solving the problems of low efficiency and proneness to missed detection existing in manual detection of an electric connector. According to the aviation electric connector pin position deviation detection method, pin template images with different specifications are made; electric connector pin images are obtained; an area of interest with the pin images is reserved, and background interference is filtered; coordinates of optimal matching points are obtained as approximate positions of pins by performing template matching on the electric connector pin images by use of the pin template images; search is carried out by taking the approximate positions of the pins as centers, pin bright spots are sought, calculated mass center positions are taken as position information of the pin centers under an image coordinate system, then after the position information is converted into position information under an actual physical coordinate system, the position information under the actual physical coordinate system is compared to an electric connector contact hole position arrangement standard in a national standard, and whether pin position deviations are within an allowed scope is determined. The method has the advantages of high precision, high automation efficiency and low miss rate.

Description

technical field [0001] The invention relates to a method for detecting position deviation of pins of an aviation electrical connector. Background technique [0002] Aerospace electrical connectors are responsible for the power transmission of the control system and the control and transmission of signals. In various military aircraft and weaponry, electrical connectors are widely used, especially in aircraft manufacturing and aerospace engineering. From system, subsystem, cabinet, combination, printed board to each replaceable independent unit socket, any failure of electrical connector will lead to failure of aerospace system engineering. Therefore, the reliability of aerospace electrical connectors is of great significance to ensure the reliability of the entire system engineering. [0003] The electrical connector consists of a fixed-end electrical connector (hereinafter referred to as the socket) and a free-end electrical connector (hereinafter referred to as the plug)...

Claims

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Application Information

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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 唐文彦张晓琳卢佳宇王军
Owner HARBIN INST OF TECH
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