Patent ID: 8493073
Filing Date: 2013-07-23
Classification: G01R

Abstract:
1. An insulation resistance detecting apparatus for detecting an insulation resistance of a load circuit, the apparatus comprising: a coupling capacitor of which a first end is connected to the load circuit; a periodic waveform output section which is connected to a second end of the coupling capacitor, and outputs a periodic waveform to the second end; a waveform shaping section which extracts and amplifies a part of the periodic waveform including a peak point, outputted from the periodic waveform output section; and an arithmetic operation section which is connected to the periodic waveform output section and the waveform shaping section and determines the insulation resistance of the load circuit on the basis of a first peak value of a waveform outputted from the waveform shaping section and a second peak value, substantially at a same timing as a timing at which the first peak value is obtained, of the periodic waveform outputted from the periodic waveform output section.