US 5,285,390 A · Signal processing circuit for yaw-rate sensor

Abstract

A signal processing circuit for removing a noise component from a detection signal of a yaw-rate sensor for detecting a yaw rate generated in a motor vehicle. The processing circuit detects the magnitude of variation of the detection signal of the yaw-rate sensor so as to compare the magnitude of the detection signal with a predetermined reference value. In accordance with the comparison result, the processing circuit outputs a limitation detection signal to limit the variation to below the predetermined reference value. Further, when the magnitude of variation of the detection signal exceeds the predetermined reference value, the processing circuit outputs as the limitation detection signal the yaw rate detection signal immediately before the exceeding, and the predetermined reference value is corrected on the basis of the steering angular velocity of the steering wheel of the motor vehicle. This arrangement allows effectively eliminating a spear-like noise from the detection signal of the yaw-rate sensor.

Claims11

Dependent claims

A signal processing circuit for removing a noise component from a detection signal of a yaw-rate sensor which detects a yaw rate generated in a motor vehicle, comprising:

means for obtaining a magnitude of variation of the detection signal of the yaw-rate sensor;
comparison means for comparing the magnitude of variation of the detection signal with a predetermined reference value;
and
output means for outputting a limitation detection signal which limits the magnitude of variation to below said predetermined reference value when the magnitude of variation of the detection signal is determined to be greater than said predetermined reference value by the comparison means, and for generating a detection signal with its noise component removed based on the limitation detection signal.

1 more element

A signal processing circuit for removing a noise component from a detection signal of a yaw-rate sensor which detects a yaw rate generated in a motor vehicle, comprising:

means for obtaining a magnitude of variation of the detection signal of the yaw-rate sensor;
first comparison means for comparing the magnitude of variation of the detection signal with a first predetermined reference value;
second comparison means for comparing the magnitude of variation of the detection signal with a second predetermined reference value which is smaller than said first predetermined reference value;
and
output means for outputting a limitation detection signal which limits the magnitude of variation to below said second predetermined reference value when the magnitude of variation of the detection signal is smaller than said first predetermined reference value and greater than said second predetermined reference value, as determined by the first and second comparison means, and for generating a detection signal with its noise component removed based on the limitation detection signal.

2 more elements

Dependencies are inferred from the claim text.

Signal processing circuit for yaw-rate sensor

Life of this patent

Signal processing circuit for yaw-rate sensor

Life of this patent

Abstract

Claims11