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US4931966A
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Method of measuring vehicle speed
Assignee: Bosch Corp
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Filing: 1988-06-24
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Granted: 1990-06-05
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Expires: 2008-06-24
Abstract
Abstract In a method for measuring vehicle speed, initial vehicle speed measurement after a vehicle speed measurement power supply is turned on, is based on the predicted number of pulses to occur during a time interim which is in turn based on a period of a single pulse generated by a vehicle speed signal. After a predetermined time interval has passed, vehicle speed measurement is based on the actual number of pulses generated by vehicle speed signals during that time interval.
Inventors
- 👤 Kouichi Ishizaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:51
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/489; B; B62; B62D; B62D6/00; B62D6/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
164 words
A method of measuring vehicle speed comprising the steps of: (a) determining an initial vehicle speed; (b) receiving a plurality of vehicle speed signal inputs; (c) generating pulses corresponding to said vehicle speed signal inputs; (d) counting the number of pulses generated during a predetermined time interval; (e) calculating vehicle speed based on said number of counted pulses generated during said predetermined time interval; wherein said initial vehicle speed determining step includes the steps of: (i) receiving a first vehicle speed signal pulse after a vehicle speed measurement power supply has been turned on; (ii) generating a second vehicle speed signal pulse having a period corresponding to said first vehicle speed signal pulse; (iii) measuring the period of said generated pulse; (iv) predicting a number of pulses, which will be generated during said predetermined time interval corresponding to said first and second vehicle speed signal pulses, based upon the measured period; (v) determining said initial vehicle speed based on said predicted number of pulses.
Claim 2
Independent Claim
164 words
A method of measuring vehicle speed comprising the steps of: (a) determining an initial vehicle speed; (b) receiving a plurality of vehicle speed signal inputs; (c) generating pulses corresponding to said vehicle speed signal inputs; (d) counting the number of pulses generated during a predetermined time interval; (e) calculating vehicle speed based on said number of counted pulses generated during said predetermined time interval; wherein said initial vehicle speed determining step includes the steps of: (i) receiving a first vehicle speed signal pulse after a vehicle speed measurement power supply has been turned on; (ii) generating a second vehicle speed signal pulse having a period corresponding to said first vehicle speed signal pulse; (iii) measuring the period of said generated pulse; (iv) predicting a number of pulses, which will be generated during said predetermined time interval corresponding to said first and second vehicle speed signal pulses, based upon the measured period; (v) determining said initial vehicle speed based on said predicted number of pulses.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein subsequent vehicle speed measurement is performed within one clock period.
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |