| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality detector for a sensor which enables the simplification of a hardware as well while making a main sensor and a sub sensor coincident in output characteristic. SOLUTION: A main sensor 101a and a sub sensor 101b are two systems which operate in the same direction and a voltage of the same polarity is applied to both the sensors 101a and 101b from a common power source of a voltage application means 100. It is so arranged that an output value of the sub sensor 101b is offset by a specified value with respect to an output value of the main sensor 101a by an offset means 103 and when finding a difference between the outputs of both the sensors to be outside the range of a specified value, an abnormality judging means 102 determines abnormality.
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