PCB probe positioning method and device, graphics processor and storage medium

Abstract

The invention relates to a PCB probe positioning method and device, a graphics processor and a storage medium. The method comprises the steps of collecting an initial image of a PCB through a constructed camera model; obtaining imaging parameters of the PCB, and correcting the initial image according to the imaging parameters to obtain a target image; selecting at least two feature areas on the PCB as eye spots, and obtaining eye spot images; and calculating a deviation value according to the eye spot image and the target image, inputting the deviation value into a shader for processing, and carrying out PCB probe positioning according to the deviation value. An initial image is acquired based on an existing PCB, and imaging parameters are acquired so as to correct the initial image, so that accurate positioning of a PCB probe can be conveniently realized; by inputting the deviation value into the shader for processing, the processing speed can be increased, and the probe testing efficiency can be improved.

Description

technical field [0001] The invention relates to the field of PCB visual positioning and detection, in particular to a PCB probe positioning method, device, graphics processor and storage medium. Background technique [0002] The name of PCB is printed circuit board, also known as printed circuit board. It is an important electronic component, a support for electronic components, and a carrier for electrical interconnection of electronic components. PCB image positioning is to identify the rotation angle and area coordinates of the PCB from the pictures containing the PCB and the background collected on the PCB production line. Accurate positioning is an important step in the PCB defect detection process. The accuracy and speed of positioning have a great influence on the PCB detection effect. At present, the automatic positioning of PCB probes generally adopts two methods of pre-inputting the coordinates of the design drawing and visual positioning. The probe station posit...

AI Technical Summary

Problems solved by technology

[0003] The probe station positioning detection system for positioning on the design drawing will cause positioning deviation due to errors introduced by the manufacturing process, poor contact between the probe and the test point will lead to unstable test data, and may also cause damage to other non-test points on the PCB; The machine vision system is the main body of the probe automatic positioning detection system. The positioning accuracy depends on the machine vision algorithm. The simple model matching algorithm has high execution efficiency but has high requirements on structural design and error. 1:1 matching is required, and compatible images have rotation And the transformed model matching algorithm has a large amount of calculation, which makes the test time of the test system longer and the test efficiency lower

[0004] Therefore, the traditional PCB probe positioning method has the problem of inaccurate positioning

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