Malfunction detection system and integrated circuit

The present invention is applicable to various sensor outputs including pulse signals and reduces cost for detecting malfunction. The malfunction detection system detects a malfunction in a sensor, and the malfunction detection system includes a sensor including a first terminal, and which outputs a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SADAYUKI EIICHI, SUMI TATSUMI
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS GYROSCOPIC INSTRUMENTS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	The present invention is applicable to various sensor outputs including pulse signals and reduces cost for detecting malfunction. The malfunction detection system detects a malfunction in a sensor, and the malfunction detection system includes a sensor including a first terminal, and which outputs a sensor output current that varies a voltage level of the first terminal, a current output unit which varies the voltage level of the first terminal by outputting a constant current for judging to the sensor via the first terminal, and a judging unit which judges that the sensor is malfunctioning when the current for judging causes the voltage level of the first terminal to be equal to or higher than a threshold in a period different from a first period where the sensor output current causes the voltage level of the first terminal to be equal to or higher than the threshold.