Apparatus and method for abnormality detection of a vibration angular velocity sensor, abnormality detecting per gram of and relevant vehicle control system

摘要

before the direction of the abnormality detection for detecting an abnormal condition of a vibration angular velocity sensor (1) comprising:an acceleration sensor (10), which in the vicinity of the vibration angular velocity sensor (1) is arranged a an ultrasonic atomizing vibratory element (2), a detection circuit (3) and a drive circuit (4) contains;a bandpass filter (22), of a predetermined frequency component from the output signal (vs) of the acceleration sensor (10) are extracted and a corresponding signal (vs), which contains the extracted frequency component output;wherein the predetermined frequency component of a difference of a resonant frequency (fd) of a control system, the the drive circuit (4) and the vibrator element (2), and a resonant frequency (fs) of a sensing system which the detection circuit (3) and the vibrator element (2); anda window comparator (24), the one level of the output signal (vs) of the bandpass filter (22) with a first predetermined voltage level (vr3) and a second predetermined voltage level (vr), the lower than the first predetermined voltage level (vr3) is, compares;wherein the window comparator (24), a corresponding diagnostic signal (vd), the an abnormal condition of the vibration angular velocity sensor (1), when the level of the output signal (vs) of the bandpass filter (22) is larger than the first predetermined voltage level (vr3) or less than the second predetermined voltage level (vr) is.