Sensor arrangement for detecting e.g. pressure of micro electromechanical system of motor car, has sensor for detecting physical quantity, and device for online monitoring sensitivity of arrangement

摘要

#CMT# #/CMT# The arrangement (10) has a sensor (12) for detecting a physical quantity. A converter (14) transforms a physical input into voltage. An analog/digital (A/D) converter (16) produces a digital sensor output signal. A device (18) online monitors sensitivity of the arrangement. A stimulus generator (20) generates sensitivity of a stimulus. A stimulus passport filter (24) provides a stimulus filter output signal. A multiplier (28) multiplies the stimulus filter output signal with a correlation signal. A stimulus band elimination filter is placed between the A/D converter and an evaluation unit. #CMT# : #/CMT# An independent claim is also included for a method for online monitoring of a sensor arrangement. #CMT#USE : #/CMT# Sensor arrangement for detecting a physical quantity e.g. pressure, force, and acceleration, of a micro electromechanical system, an anti-lock braking system and an electronic stability program(RTM: active safety system), of a motor car. #CMT#ADVANTAGE : #/CMT# The arrangement can provide self check operation without disrupting intended measurement of the sensor by a multiplexer. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a block diagram of a sensor arrangement. 10 : Sensor arrangement 12 : Sensor 14 : Converter 16 : A/D converter 18 : Online monitoring device 20 : Stimulus generator 24 : Stimulus passport filter 28 : Multiplier.