Patent ID: 7233847

Claim:
An angular velocity sensor system that is provided in a vehicle and includes at least two angular velocity sensors that individually output angular velocity signals, the system executing abnormality detection of the angular velocity sensors based on comparison between states of the outputted angular velocity signals, the system comprising: a first low-pass filter that is provided before an angular velocity signal of each of the angular velocity sensors is outputted, wherein the first low-pass filter includes a first cut-off frequency and removes, from an angular velocity signal, a high-frequency-side component unnecessary for vehicular control; a second low-pass filter for each angular velocity sensor that includes a second cut-off frequency that is lower than the first cut-off frequency; an output unit of each angular velocity sensor that outputs an angular velocity signal, which has passed through the first low-pass filter and has not passed through the second low-pass filter; and an abnormality-detection processing unit that executes the abnormality detection using a low-frequency-side angular velocity signal of each angular velocity sensor that has passed through the second low-pass filter in said comparison to determine the abnormality of the two angular velocity sensors to thereby decrease the frequency component of the angular velocity signal whose frequency is between the first cut-off frequency and the second cut-off frequency.