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Method for detecting fracture splitting notch of connecting rod of automobile based on machine vision

A technology of automotive connecting rods and machine vision, applied in the direction of instruments, measuring devices, optical devices, etc., can solve the problem of not being able to accurately detect whether there is a cracking groove on the connecting rod and whether the connecting rod cracking groove is qualified, etc., to improve the interface And practicability, good stability and accuracy, strong anti-interference ability

Inactive Publication Date: 2013-03-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the existing technology cannot accurately detect whether the cracking groove on the connecting rod exists and whether the cracking groove on the connecting rod is qualified, and provides a method for detecting the cracking groove of an automobile connecting rod based on machine vision

Method used

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  • Method for detecting fracture splitting notch of connecting rod of automobile based on machine vision
  • Method for detecting fracture splitting notch of connecting rod of automobile based on machine vision
  • Method for detecting fracture splitting notch of connecting rod of automobile based on machine vision

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Embodiment

[0092] 1. If there is no change between the model of the connecting rod detected this time and the model of the connecting rod detected last time, no system calibration is required. System calibration is required when the model of the connecting rod changes: plan the areas that need to be processed during the detection process for the image of the cracking tank on the left side of the connecting rod and the image of the cracking tank on the right side of the connecting rod, and record the starting and ending coordinates of the calibrated area , for use in detection.

[0093] 2. In general detection, automatic detection will be selected. The detection process is that the computer 1 automatically obtains the signal trigger through the communication serial port with the programmable logic controller 2, and the image acquisition is performed through the No. 1 camera 8 and the No. 2 camera 14; Line 11 and No. 2 connection line 12 transmit the obtained connecting rod image through ...

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Abstract

The invention discloses a method for detecting a fracture splitting notch of a connecting rod of an automobile based on machine vision, which intends to overcome the problem in the prior art that the existence of the fracture splitting notch on the connecting rod cannot be accurately detected, and the qualification of the fracture splitting notch also cannot be accurately detected. The method for detecting the fracture splitting notch of the connecting rod of the automobile based on machine vision comprises the following steps: 1, calibrating by a system; 2, receiving an input signal; 3, acquiring the image: converting the images acquired by two cameras from analog signals into digital signals by an image acquiring module, and inputting the digital signals into a computer memory; 4, processing images: filtering the digital images of the fracture splitting notches on the left side and the right side, detecting the edges, distinguishing based on the characteristics of the fracture splitting notches, and determining whether the fracture splitting notches exist and whether the fracture splitting notches are qualified, thus obtaining the detection result; and 5, outputting and searching the results, wherein a result searching module is arranged and provides the function of searching the data relative to the detection process, including detecting time, number of detecting images, quantity of detected connecting rods, quantity of qualified connecting rods, quantity of unqualified connecting rods, and the qualification of the detection results, and also provides the function of printing.

Description

technical field [0001] The invention relates to a method for detecting automobile connecting rods, more precisely, the invention relates to a method for detecting cracking grooves of automobile connecting rods based on machine vision. Background technique [0002] The research of machine vision started from the research of American scholar L.R. Roberts in the mid-1960s on understanding the world of building blocks composed of polyhedrons. The preprocessing, edge detection, contour line composition, object modeling and matching technologies used at that time have been applied in machine vision since then. At that time, Roberts used a bottom-up method in the image analysis process, using edge detection technology to determine the contour line, and using area analysis technology to divide the image into regions composed of pixels with similar gray levels. These technologies are collectively referred to as image segmentation. Its purpose is to describe the analyzed image with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01B11/24
Inventor 刘长英蔡文静李机智王天皓周婧乔宇孙小温贾艳梅宋玉河
Owner JILIN UNIV
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