US3594555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for measuring angular acceleration
Assignee: Continental Teves AG and Co OHG
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Filing: 1968-09-19
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Granted: 1971-07-20
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Expires: 1988-09-19
Abstract
Abstract In order to measure angular acceleration, two sine wave signals U1 and U2 of a frequency determined by the angular velocity are generated by a rotating body, preferably a vehicle wheel. These signals U1 and U2, and their time derivatives are combined to produce an output corresponding to the second time derivative of angular displacement phi (t) (i.e. angular acceleration) in accordance with the relationship: U2.U1- U1.U2 m2 phi (t) (m2 U12+U22). The output controls an antiskid system for the brake.
Inventors
- 👤 Hans-Christof Klein
- 👤 Gunther Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:22
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/16; G01P15/165; B; B60; B60L; B60L3/00; B60L3/10; B60T; B60T8/00; B60T8/17; B60T8/172; B60T8/32; B60T8/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A method of operating an acceleration-responsive device in accordance with the angular acceleration of a rotating body, comprising the steps of generating two sinusoidal signals U1 and U2 of a frequency proportional to the angular velocity of said body and 90* out-of-phase relationship; deriving from the out-ofphase signals U1 and U2, second time derivatives U1 and U2 respectively; and combining said signals to produce an output for operating said device and proportional to the angular acceleration of said body in accordance with the relationship m2. phi (t) U1.U2-U2.U1 where phi (t) is the angular acceleration and m2 is a proportionality constant.
Claim 2
Independent Claim
101 words
A method of operating an acceleration-responsive device in accordance with the angular acceleration of a rotating body, comprising the steps of generating two sinusoidal signals U1 and U2 of a frequency proportional to the angular velocity of said body and 90* out-of-phase relationship; deriving from the out-ofphase signals U1 and U2, second time derivatives U1 and U2 respectively; and combining said signals to produce an output for operating said device and proportional to the angular acceleration of said body in accordance with the relationship m2. phi (t) U1.U2-U2.U1 where phi (t) is the angular acceleration and m2 is a proportionality constant.
Claim 3
Dependent Claim
23 words
The method defined in claim 1 wherein said rotating body is a vehicle wheel and said device is an antiskid brake control system.
Claim 4
Independent Claim
138 words
A system for operating an acceleration-responsive device in accordance with the angular acceleration of a rotating body, comprising signal generator means coupled with said body for producing two sinusoidal signals U1 and U2 of a frequency proportional to the angular velocity of said body and a 90* out-of-phase relationship with one another; differentiator means for generating further signals U1 and U2 corresponding to the first time derivatives of the out-of-phase signals, respectively; second diffErentiator means for producing second time derivatives U1 and U2 from the corresponding first time derivatives; and circuit means for combining said signals and said derivatives to produce an output proportional to the angular acceleration of said body and for operating said device in accordance with the relationship m2 phi (t) U1.U2-U2.U1 where phi (t) is the angular acceleration and m is a proportionality constant.
Claim 5
Independent Claim
138 words
A system for operating an acceleration-responsive device in accordance with the angular acceleration of a rotating body, comprising signal generator means coupled with said body for producing two sinusoidal signals U1 and U2 of a frequency proportional to the angular velocity of said body and a 90* out-of-phase relationship with one another; differentiator means for generating further signals U1 and U2 corresponding to the first time derivatives of the out-of-phase signals, respectively; second diffErentiator means for producing second time derivatives U1 and U2 from the corresponding first time derivatives; and circuit means for combining said signals and said derivatives to produce an output proportional to the angular acceleration of said body and for operating said device in accordance with the relationship m2 phi (t) U1.U2-U2.U1 where phi (t) is the angular acceleration and m is a proportionality constant.
Claim 6
Dependent Claim
71 words
The system defined in claim 3 wherein said signal generator means includes a pair of permanent magnet members rotatably connected with said body, and a pair of coil members respectively associated with said magnet members for the induction of the respective sinusoidal signal thereof, one of the associated magnet and coil members being angularly offset by 90* from the corresponding member of the other associated pair of magnet and coil members.
Claim 7
Dependent Claim
20 words
The system defined in claim 4 wherein said magnet members are polarized in 90* angularly offset relationship with one another.
Claim 8
Dependent Claim
19 words
The system defined in claim 3 wherein said device is an antiskid brake control system for an automotive vehicle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |