ON-VEHICLE RECEIVER OF FREQUENCY VARIABLE ATS, ON-VEHICLE DEVICE OF FREQUENCY VARIABLE ATS, AND SOUNDNESS DIAGNOSTICS METHOD FOR ON-VEHICLE RECEIVER OF FREQUENCY VARIABLE ATS

PROBLEM TO BE SOLVED: To obtain an on-vehicle receiver of a frequency variable ATS which can check the soundness of a filter circuit, an on-vehicle device of the frequency variable ATS, and a soundness diagnostics method for the on-vehicle receiver of the frequency variable ATS. SOLUTION: The on-vehicle device of the frequency variable ATS includes: an examination-signal generation part 1 that generates examination signal 11 when powered up on for sending the signal out; a selector 2 that selects either the examination-signal 11 or a normal regular oscillation signal; an amplifier 3; a pickup coil 4 that forms a return circuit; an amplifier 5; a phase controller 6 that controls the phases of the output signals of the amplifier 5; amplitude controller 7 that controls the amplitude of the output signals of the phase controller 6; a filter circuit 8 that passes signal components of respective predetermined frequencies; a level detection part 9 that detects the level of the signal components; a signal distinction part 10 that determines the frequency of a signal from the level; and a control part that checks the soundness of the filter circuit 8 by comparing the determination result by the signal distinction part 10 and a resonance frequency. COPYRIGHT: (C)2011,JPO&INPIT