ABNORMALITY DETECTOR

To detect an abnormality in a resistor without using a shunt resistance.SOLUTION: An abnormality detector has: a first resistor that constitutes a heater; a second resistor that constitutes the heater, and is connected in series with the first resistor; a voltage measuring instrument that measures the voltage between both ends of at least one of the first resistor and the second resistor; and a detection unit that detects an abnormality in the heater based on a measured value measured by the voltage measuring instrument.SELECTED DRAWING: Figure 1 【課題】シャント抵抗を用いることなく抵抗体の異常を検出する。【解決手段】異常検出装置は、ヒータを構成する第１の抵抗体と、ヒータを構成する抵抗体であって、第１の抵抗体に直列に接続された第２の抵抗体と、第１の抵抗体と第２の抵抗体の少なくとも一方の両端電圧を測定する電圧測定器と、電圧測定器によって測定された測定値に基づいて、ヒータの異常を検出する検出部と、を有する。【選択図】図１