A positioning system and method for PCBA automatic testing

Abstract

The invention discloses a positioning system and method for automatic testing of a PCBA. The system comprises a work bench, a robot, a plurality of testing clamps, a mobile camera, a fixed camera, and a visual processing system. The robot arranged on the work bench is used for executing a transfer motion of a PCBA product. The multiple testing clamps are distributed around the robot and are arranged in a working range of the robot. The mobile camera fixed at the tail end of the robot moves dynamically with the robot and is used for collecting a marking point image on the upper surface of the PCBA product and marking point images of the testing clamps. The fixed camera fixed on the work bench is used for collecting a marking point image at the bottom of the PCBA product, wherein the shooting direction of the fixed camera is perpendicular to the upper surface of the work bench. The visual processing system is used for obtaining pose information of the robot and all testing clamps according to the making point images of the upper surface and bottom of the PCBA product as well as the marking point images of the testing clamps. Therefore, deviation caused by the vacuum chuck can be eliminated; the positioning precision is high; and rapid calibration of the testing clamps is realized.

Description

technical field [0001] The invention relates to machine vision positioning technology, in particular to a positioning system and method for PCBA automatic testing. Background technique [0002] There are two ways to test PCBA of electronic products: manual operation and automatic test. Due to irregularities in manual operation and increasing labor costs, more and more manufacturers tend to use mature automated testing equipment to complete fully automatic PCBA testing. [0003] Realizing PCBA automatic testing needs to solve two difficulties: automatic positioning of PCBA, quick calibration of test fixture after product changeover. Most of the existing PCBA automatic testing equipment adopts robot teaching or single camera positioning method to realize automatic product positioning. The disadvantage of robot teaching method is that the teaching workload is heavy and the operation is cumbersome, and the single camera positioning method cannot eliminate the problems caused by...

AI Technical Summary

Problems solved by technology

Most of the existing PCBA automatic testing equipment adopts robot teaching or single camera positioning method to realize automatic product positioning. The disadvantage of robot teaching method is that the teaching workload is heavy and the operation is cumbersome, and the single camera positioning method cannot eliminate the problems caused by vacuum suction cups. deviation, resulting in poor final positioning accuracy; the existing PCBA automatic test equipment needs to be calibrated by manual adjustment or robot teaching after replacing the test fixture. needs

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