IN-VEHICLE WIRING ABNORMALITY DETECTION DEVICE

• Main Authors: KOBAYASHI HISASHI, SAKAI YOSHIMITSU
• Format: Patent
• Language: English; Japanese
• Published: 07.12.2015
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; PUBLIC ADDRESS SYSTEMS; TESTING; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

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