Method and device for detection of a defect in a sensor system

摘要

A method for implementation in a measuring system containing a sensor system and an arithmetic unit for detection of a defect in the measuring system, wherein at least one state variable of the system is derived from at least one sensor value in the measuring system, wherein a cost function value based on deviation of the measured value y from the calibration as a function of a previously calculated state x is calculated for the respective measurement and the calculated squared deviation is then compared with a corresponding threshold value. An error is identified and if necessary appropriate action is taken if the threshold value is exceeded.