PROBLEM TO BE SOLVED: To accurately detect deterioration of insulation resistance of an electrical system mounted to a vehicle by a comparatively simple constitution.SOLUTION: An insulation resistance deterioration detection device 600 comprises an AC power source 610, a detection section 640, a threshold setting section 650 and a determination section 660, and detects deterioration of insulation resistance of an electrical system 105 mounted to a vehicle 100. The AC power source 610 imparts an AC signal to a signal line electrically connected to the electrical system. The detection section detects a peak value of the AC signal in the signal line. The threshold setting section changes a threshold for determining insulation resistance deterioration according to electrical equipment connected to the electrical system. The determination section detects the deterioration of the insulation resistance on the basis of the peak value detected by the detection section falling below the threshold set in the threshold setting section.SELECTED DRAWING: Figure 2
【課題】比較的シンプルな構成により、車両に搭載された電気系統の絶縁抵抗の低下を精度よく検出する。【解決手段】絶縁抵抗低下検出装置600は、交流電源610と、検出部640と、しきい値設定部650と、判定部660とを備え、車両100に搭載された電気系統105の絶縁抵抗の低下を検出する。交流電源610は、電気系統に電気的に接続される信号線に交流信号を与える。検出部は、信号線における交流信号の波高値を検出する。しきい値設定部は、電気系統に接続される電気機器に応じて、絶縁低下判定用のしきい値を変更する。判定部は、検出部によって検出された波高値が、しきい値設定部で設定されたしきい値を下回ったことに基づいて、絶縁抵抗の低下を検出する。【選択図】図2
INSULATION RESISTANCE DETERIORATION DETECTION DEVICE
絶縁抵抗低下検出装置
2016-11-17
Patent
Electronic Resource
Japanese
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