SENSOR DEVICE AND ELECTRIC POWER STEERING DEVICE USING SAME

摘要

A sensor device includes two sensor parts and an ECU. An output division of one of the two sensor parts stops output of an output signal when a detected internal abnormality is a first abnormality. Further, when the detected internal abnormality is a second abnormality that is different from the first abnormality, the output division controls an abnormality signal to take a value indicative of the second abnormality. An abnormality determiner determines either of a signal obtainment abnormality or the first abnormality of the sensor part when the output signal is not obtained from the one of the sensor parts, or determines the second abnormality of the one of the sensor parts when the obtained output signal includes the abnormality signal having a value indicative of the second abnormality. Such determination, thus, enables the abnormality determiner to classify an abnormality caused in the sensor parts.

主权项

1. A sensor device comprising:
a sensor part including:
a plurality of sensor elements detecting a physical quantity regarding a detection object;an abnormality detector detecting an internal abnormality; andan output division generating and outputting, as an output signal, a digital signal that includes a sensor signal and an abnormality signal, the sensor signal corresponding to detection values of the plurality of sensor elements, and the abnormality signal corresponding to a detection result of the abnormality detector; a controller including:
a signal obtainer obtaining the output signal from the sensor part;an abnormality determiner determining abnormality of the sensor part; anda calculator performing calculation by using the sensor signals, wherein the output division 1) stops output of the output signal, when a detected internal abnormality is a first abnormality, or 2) sets the abnormality signal to a value that indicates a second abnormality, when the detected internal abnormality is the second abnormality that is different from the first abnormality, and the abnormality determiner determines (i) either of (i-a) a signal obtainment abnormality or (i-b) the first abnormality of the sensor part, when the output signal is not obtained from the sensor part, or (ii) the second abnormality of the sensor part, when the output signal including the abnormality signal is obtained from the sensor part, and takes a value that indicates the second abnormality.