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Detection method of automobile door based on vision measurement

A technology for automobile doors and detection methods, which is applied to measurement devices, instruments, and optical devices, etc., can solve the problems of direct measurement errors and low position accuracy of robots, and achieve the goal of improving flexibility and automation, improving measurement accuracy, and eliminating errors. Effect

Inactive Publication Date: 2011-01-19
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the commercial industrial robots now have low position accuracy in the field environment, which will bring relatively large errors to the direct measurement of the robot

Method used

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  • Detection method of automobile door based on vision measurement
  • Detection method of automobile door based on vision measurement
  • Detection method of automobile door based on vision measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Position the standard car door in a positioning workpiece, set multiple measured points on the edge of the standard car door and the tested car door and set multiple marking points on the inner wall of the positioning workpiece, establish a stereo vision measurement system and calibrate the camera internal and external parameters;

[0022] (2) The computer controls the robot to move to the vicinity of the first marking point, write down the three-dimensional space coordinates of the robot at this time, and the camera captures the image of the first marking point to solve the three-dimensional space coordinates of the first marking point;

[0023] (3) The robot does not move, and the computer controls the camera to move along the guide rail to the vicinity of the first measured point. The camera’s coordinate system at this time is calculated by the distance the camera moves on the guide rail and the robot’s operational model, and the camera shoots the first point. Th...

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Abstract

The invention discloses a detection method of an automobile door based on vision measurement, comprising the following steps: (1) locating a standard automobile door in a locating workpiece, setting multiple measured points at the edges of the standard automobile door and the detected automobile door and setting multiple mark points on the locating workpiece; (2) working out the three-dimensional space coordinate of a first mark point; (3) working out the three-dimensional space coordinate of a first measured point; (4) working out gap distance between the first mark point on the locating workpiece and the first measured point on the standard automobile door; (5) repeating step (2)-step (4) to finish measuring the gap distances between all mark points on the locating workpiece and the measured points on the standard automobile door; and (6) replacing the standard automobile door, fixing the measured automobile door at the position of the standard automobile door and finishing measuring the gap distances between all mark points on the locating workpiece and the measured points on the measured automobile door. The method of the invention eliminates error of a robot, thus the detection precision can reach 0.1mm.

Description

technical field [0001] The invention relates to a detection method of an automobile inspection tool, in particular to a detection method of an automobile door based on visual measurement. Background technique [0002] After stamping or injection molding, auto parts must be inspected before loading, and the inspection must often be carried out with the help of inspection tools. As an important supporting product in the mold industry, Checking Fixture is attracting more and more attention from enterprises. Due to their own production needs and its high added value, many mold companies have taken it as an important development direction. As a new technology, the related technology of inspection tools is being introduced by more and more mold companies. [0003] The automobile inspection tool is composed of a detection structure positioning structure, a clamping structure, a supporting structure, a base, and other auxiliary parts. The existing design is to design the correspo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/03G01B11/14
Inventor 刘常杰邾继贵
Owner TIANJIN UNIV
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