PROBLEM TO BE SOLVED: To detect wiring abnormality about a plurality of conducting wires reaching an electronic circuit to which a microphone is connected.SOLUTION: A wiring abnormality detection device is configured of: a detection part 36 installed in a post device 32; and a detection line 55 connected to a voltage dividing circuit 16. The wiring abnormality detection device is used for an in-vehicle circuit including: an amplifier 14 to which the microphone 12 is connected; and the voltage dividing circuit 16 connected to the amplifier 14. The in-vehicle circuit includes: a power supply line 54 for supplying power to the amplifier 14, and for applying a voltage to the voltage dividing circuit 16; a ground line 50 connected to the minus power supply terminal of the amplifier 14; and a signal line 48 connected to the amplifier 14 for transmitting a signal amplified by the amplifier 14. The detection part 36 detects the wiring abnormality of the power supply line 54 or the ground line 50 on the basis of a detection voltage Vd which appears in the detection line 55.
【課題】マイクロホンが接続された電子回路に至る複数の導線について、配線異常を検出することを目的とする。【解決手段】後位機器32が備える検出部36と、分圧回路16に接続された検出線55は配線異常検出装置を構成する。配線異常検出装置は、マイクロホン12が接続されたアンプ14と、アンプ14に接続された分圧回路16とを備える車載回路に対して用いられる。この車載回路は、アンプ14に電力を供給すると共に分圧回路16に電圧を与える電力供給線54と、アンプ14のマイナス電源端子に接続された接地線50と、アンプ14に接続されアンプ14によって増幅された信号を伝送する信号線48とを備える。検出部36は、検出線55に現れる検出電圧Vdに基づいて、電力供給線54または接地線50の配線異常を検出する。【選択図】図1
IN-VEHICLE WIRING ABNORMALITY DETECTION DEVICE
車載用の配線異常検出装置
2015-12-07
Patent
Elektronische Ressource
Japanisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler |
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