Method and system for judging old and new degree of circuit board based on electrical inspection

Abstract

The invention discloses a method and system for judging the old and new degree of a circuit board based on electrical inspection, and belongs to the technical field of circuit board detection. The method for judging the old and new degree includes the following steps that the circuit board is fixed, and an electric signal detection probe is placed on a preset bonding pad; a detection circuit is set to supply excitation to the two ends of the bonding pad of the circuit board; elements on the circuit board are excited and driven to operate and generate electric signals, and then the electric signal detection probe collects detection electric signals output by the bonding pad; the acquired detection electric signals are compared with standard electric signals according to preset judgment indexes; the judgment result is output according to the comparison result. By the utilization of the method and system for judging the old and new degree, the old and new degree of the circuit board can be judged, and the method has the advantages of being accurate, rapid and capable of improving detection efficiency and reducing man-made judgment difficulties and errors, can be widely used for detecting components of the circuit board, and is especially suitable for detecting import electromechanical machines on import ports of the whole country.

Description

technical field [0001] The invention relates to a method for detecting a circuit board, in particular to a method and a system for judging the newness of a circuit board based on electrical inspection. Background technique [0002] With the rapid development of my country's foreign economic and trade, the import of used mechanical and electrical products has a relatively large increase every year. As a part of industrial basic equipment, imported old mechanical and electrical products have played a certain role in promoting cost saving, accelerating construction, and promoting the development of my country's industrial technology in different periods. However, compared with the increasing requirements for product safety, hygiene, and environmental protection and the update of supporting standards, imported old mechanical and electrical products often do not conform to the current mandatory technical specifications for product safety, hygiene, and environmental protection in ...

AI Technical Summary

Problems solved by technology

[0004] At present, the detection method of the newness of circuit board components is mainly through optical inspection, and the quality of the printed circuit board is detected by analyzing the image formed by the reflected light or transmitted light of the printed circuit board, so as to further judge its newness and oldness. The detection cost of this method is relatively high. , and because the light transmittance of different circuit boards is different, it is difficult to establish a unified evaluation standard

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