A PCB detection method and a detection device

Abstract

The application discloses a kind of detection method and device of PCB, the detection method of PCB includes the area of detection area in the acquisition of the circuit board stack to be detected and preset position;First magnetic field is provided to the preset position of detection area;The angle of the magnetic field direction of first magnetic field and the plane where PCB is not 0 °, and the magnetic induction intensity of first magnetic field uniformly increases or uniformly decreases;In the process that first magnetic field is provided to the preset position of detection area, the electric signal output by detection line and the magnetic induction intensity variation of first magnetic field in preset time are acquired in real time;According to electric signal, the length of preset time, the magnetic induction intensity variation of first magnetic field in preset time, the area of detection area and the preset position of detection area, determine the offset data of detection line;According to the preset position of detection line, the offset data of detection line and offset threshold value determine the use performance of PCB, can effectively improve the detection efficiency of circuit board stack offset in PCB, improve product yield.

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