CORROSION PREVENTION METHOD, CORROSION PREVENTION DEVICE, SIGNAL PROCESSOR, AND CONTROL UNIT

摘要

PROBLEM TO BE SOLVED: To provide a corrosion prevention method which suppresses excessive flow of corrosion prevention current, a corrosion prevention device, a signal processor, and a control unit.;SOLUTION: A variable impedance means 22 is electrically connected to a detection conductive path 17 connected to a contact 14. The variable impedance means 22 is constituted capable of switching over between a low impedance to flow a corrosion prevention current IA to the detection conductive path 17 and a high impedance to flow a connection detection current IB to the detection conductive path 17. A comparison switching part 12 compares the potential of the detection conductive path 17 with corrosion potential VX and recovery potential VR, and based on this comparison result, switches over the variable impedance means 22.;COPYRIGHT: (C)2007,JPO&INPIT