Alignment device and alignment method

Abstract

The invention provides an alignment device and an alignment method. The alignment device includes a storage device, an image capture device and a processor. The storage device stores multiple sets of preset reference point information. The above-mentioned image capture device captures a plurality of images, wherein each of the above-mentioned images respectively corresponds to a different block of a circuit board to be tested and a set of the above-mentioned multiple sets of preset reference point information. The processor is coupled to the storage device and the image capture device, and the processor selects a first candidate reference point in each of the images, and according to the first candidate reference point and the preset reference point information , find all other candidate reference points matching the first candidate reference point, so as to generate a pair of position information corresponding to each of the above images.

Description

technical field [0001] The present invention relates to alignment technology, in particular to finding the alignment information of candidate reference points corresponding to each block of the circuit board to be tested by means of an alignment device according to preset reference point information, and performing detection according to the alignment information alignment technology. Background technique [0002] In the inspection process of Automated Optical Inspection (AOI) of printed circuit board (Printed Circuit Board, PCB), the position of all components on the circuit board must first be known before the detection of component defects can be started. Before the inspection, the reference point of the image of the circuit board will be found first, and then the positions of all components to be inspected on the circuit board will be calculated one by one. However, in the case where the circuit board is placed on the dynamic streamline conveyed by the conveyor belt, th...

AI Technical Summary

Problems solved by technology

The coordinate position of the reference point will be affected by the difference in image capture time, the speed of the conveyor belt, and the offset or rotation angle of the circuit board on the conveyor belt, so that the actual reference point will appear different from the preset reference point image position, thus making it impossible to achieve accurate image alignment

[0003] Therefore, how to solve the problem of inability to accurately complete the image alignment caused by the translation and rotation of the circuit board in the process of conveying the circuit board on the conveyor belt will be a subject worth discussing

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