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US5285390A
Expired / Lapsed
US
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Signal processing circuit for yaw-rate sensor
Assignee: Denso Corp
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Filing: 1991-06-04
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Granted: 1994-02-08
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Expires: 2011-06-04
Abstract
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.
Inventors
- 👤 Satoshi Haseda
- 👤 Yoshihiko Tsuzuki
- 👤 Ichiro Akahori
- 👤 Hideo Inoue
- 👤 Osamu Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:44
CPC Classifications
B; B62; B62D; B62D6/00; B62D6/002; B62D6/003; B62D6/005; B62D7/00; B62D7/06; B62D7/14; B62D7/15; B62D7/159
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
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.
Claim 2
Dependent Claim
121 words
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.
Claim 3
Dependent Claim
42 words
A signal processing circuit as claimed in claim 1, wherein, when the magnitude of variations of the detection signal exceeds said predetermined reference value, said output means outputs as said limitation detection signal the yaw rate detection signal immediately before the exceeding.
Claim 4
Dependent Claim
127 words
A signal processing circuit as claimed in claim 2, further comprising means for, in the case of changing from the state that the magnitude of the variation of the detection signal exceeds said predetermined reference value to the state that it becomes below said predetermined reference value, calculating the difference between the detection signal value of said yaw rate sensor at the changing time and the previous output value, and comprising means for processing the yaw rate output value so that the yaw rate output value is relatively coincident in variation with the yaw rate detection signal value after the changing, and comprising means for gradually reducing the calculated difference so that the yaw rate output value approaches the detection signal value of said yaw rate sensor.
Claim 5
Dependent Claim
44 words
A signal processing circuit as claimed in claim 1, further comprising vehicle speed detecting means for detecting a speed of said motor vehicle and a correction means for correcting said predetermined reference value in accordance with the detected vehicle speed of said motor vehicle.
Claim 6
Dependent Claim
47 words
A signal processing circuit as claimed in claim 1, further comprising drive means for driving a rear-wheel steering mechanism of said motor vehicle on the basis of the yaw rate detection signal outputted from said output means so as to steer rear wheels of said motor vehicle.
Claim 7
Dependent Claim
49 words
A signal processing circuit as claimed in claim 1, further comprising detection means for detecting a steering angular velocity of a steering wheel of said motor vehicle, and correction means for correcting said predetermined reference value on the basis of the detected steering angular velocity of said steering wheel.
Claim 8
Dependent Claim
163 words
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.
Claim 9
Dependent Claim
163 words
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.
Claim 10
Dependent Claim
52 words
A signal processing circuit as claimed in claim 7, further comprising detection means for detecting a steering angular velocity of a steering wheel of said motor vehicle, and correction means for correcting said first and second predetermined reference values on the basis of the detected steering angular velocity of said steering wheel.
Claim 11
Dependent Claim
47 words
A signal processing circuit as claimed in claim 7, further comprising vehicle speed detecting means for detecting a speed of said motor vehicle and a correction means for correcting said first and second predetermined reference values in accordance with the detected vehicle speed of said motor vehicle.
Claim 12
Dependent Claim
47 words
A signal processing circuit as claimed in claim 7, further comprising drive means for driving a rear-wheel steering mechanism of said motor vehicle on the basis of the yaw rate detection signal outputted from said output means so as to steer rear wheels of said motor vehicle.
Claim 13
Dependent Claim
43 words
A signal processing circuit as claimed in claim 7, where, when the magnitude of variation of the detection signal exceeds said first predetermined reference value, said output means outputs as said limitation detection signal the yaw rate detection signal immediately before the exceeding.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |