SENSOR DEVICE

Abstract: a sensor device remains partially operational using battery power when the starting switch is off. it includes a sensor input processor with a sensor element that detects changes in physical quantities due to the movement of a detection target. an input processing circuit calculates sensor information based on these detected values. the device also has a memory that stores abnormality information, including power failure data when battery power is not supplied during the switch-off period. a voltage holding circuit on the battery feed line powers the sensor input processor without passing through the starting switch, maintaining sufficient voltage to retain data in memory during temporary battery voltage drops. additionally, the sensor input processor includes an adjustment circuit that sequentially stops functions other than data retention based on the voltage of the voltage holding circuit when it drops.

Inventor(s): HIDEKI KABUNE, TOSHIHIRO FUJITA, NAO UEMATSU

CPC Classification: G01D5/145 (MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR)

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