A near-field magnet peak values detecting method to locate short circuit points on PCB

The existing print circuit board (PCB) short circuit fault detecting schemes can only determine the existence of shorts rather than the precise location of the circuit. To solve this problem, this paper proposes a short circuit locating scheme based on the near-field magnetic specific point detecting. First, the existences of the shorted wires are detected by a short circuit detecting algorithm. Second, the short circuit networks are excited by a high voltage. Third, the peak values of the magnetic near-field exited by the voltage will detected by the sensors arranged above the circuit board and analysed. This scheme can locate the precise position of the short circuit point on board. The simulation results show that the technique is operational and can effectively locate the short circuit point position.