US3677094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a voltage equal to the speed of road vehicles
Assignee: TDK Micronas GmbH
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Filing: 1971-01-18
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Granted: 1972-07-18
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Expires: 1991-01-18
Abstract
Abstract The instantaneous speed of a road vehicle is measured by measuring the speed derived from a number of revolutions of a wheel and adding thereto the integrated value of measured speed variations. The speed variations are measured by means of the relative motion of an elastically suspended mass in the vehicle. The, thusly, measured speed is then modified by the inclination of the vehicle and its variations as measured by a normal and an astatic pendulum, respectively suspended in the vehicle. These measurements are made during the braking to influence the braking process.
Inventors
- 👤 Karl Kupfmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:01
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/172; G; G01; G01P; G01P7/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
259 words
A method of producing a voltage equal to the instantaneous speed of a road vehicle having a braking system during a predetermined period of time comprising the steps of: producing a first voltage proportional to the speed of said vehicle at the beginning of said period of time from the revolutions of one wheel of said vehicle; storing said first voltage; producing a second voltage proportional to the speed of a body relative to said vehicle, said body being supported in said vehicle by a flexible body support and capable of moving in the direction of the longitudinal axis of said vehicle; inverting said second voltage to produce a third voltage; integrating said second voltage for said period of time to produce a fourth voltage; multiplying said fourth voltage by a first factor to produce a fifth voltage, said first factor being equal to the damping constant of said body support divided by the mass of said body; inverting said fifth voltage to produce a sixth voltage; integrating said fourth voltage for said period of time to produce a seventh voltage; multiplying said seventh voltage by a second factor to produce an eighth voltage, said second factor being equal to the rigidity of said body support divided by the mass of said body; inverting said eighth voltage to produce a ninth voltage; and algebraically adding said stored first voltage, said third voltage, said sixth voltage and said ninth voltage together to produce a tenth voltage equal to said instantaneous speed when said vehicle is traveling on a horizontal surface.
Claim 2
Independent Claim
259 words
A method of producing a voltage equal to the instantaneous speed of a road vehicle having a braking system during a predetermined period of time comprising the steps of: producing a first voltage proportional to the speed of said vehicle at the beginning of said period of time from the revolutions of one wheel of said vehicle; storing said first voltage; producing a second voltage proportional to the speed of a body relative to said vehicle, said body being supported in said vehicle by a flexible body support and capable of moving in the direction of the longitudinal axis of said vehicle; inverting said second voltage to produce a third voltage; integrating said second voltage for said period of time to produce a fourth voltage; multiplying said fourth voltage by a first factor to produce a fifth voltage, said first factor being equal to the damping constant of said body support divided by the mass of said body; inverting said fifth voltage to produce a sixth voltage; integrating said fourth voltage for said period of time to produce a seventh voltage; multiplying said seventh voltage by a second factor to produce an eighth voltage, said second factor being equal to the rigidity of said body support divided by the mass of said body; inverting said eighth voltage to produce a ninth voltage; and algebraically adding said stored first voltage, said third voltage, said sixth voltage and said ninth voltage together to produce a tenth voltage equal to said instantaneous speed when said vehicle is traveling on a horizontal surface.
Claim 3
Dependent Claim
163 words
A method according to claim 1, further including the steps of: producing an eleventh voltage proportional to the angle of inclination between said longitudinal axis and a horizontal line at the beginning of said period of time; storing said eleventh voltage; producing a twelfth voltage proportional to deviations of said angle of inclination during said period of time; algebraically adding said stored eleventh voltage and said twelfth voltage to produce a thirteenth voltage; producing a fourteenth voltage equal to the sine-function of said thirteenth voltage; integrating said fourteenth voltage with respect to time during said period of time to produce a fifteenth voltage; multiplying said fifteenth voltage by the value of gravitational acceleration to produce a sixteenth voltage; inverting said sixteenth voltage to produce a seventeenth voltage; and algebraically adding said seventeenth voltage to said tenth voltage to obtain an output voltage equal to said instantaneous speed of said vehicle regardless of the inclination of the surface upon which said vehicle is traveling.
Claim 4
Dependent Claim
51 words
A method according to claim 2, wherein said step of producing said eleventh voltage includes the step of producing said eleventh voltage by the swing of a pendulum in the median plane of said vehicle, said pendulum being retained in its position assumed at the beginning of said period of time.
Claim 5
Dependent Claim
40 words
A method according to claim 3, wherein said step of producing said twelfth voltage includes the step of producing said twelfth voltage by the swing of a non-damped astatic pendulum capable of swinging in the median plane of said vehicle.
Claim 6
Dependent Claim
22 words
A method according to claim 4, wherein said period of time is the time required for each braking process of said vehicle.
Claim 7
Dependent Claim
57 words
A method according to claim 5, wherein said steps of producing said first voltage, of producing said second voltage, of producing said eleventh voltage and of producing said twelfth voltage are actuated upon start of each braking process, but prior to the responding of said brake system to enable said output voltage to influence each braking process.
Claim 8
Dependent Claim
24 words
A method according to claim 1, wherein said body is normally retained in its normal position and is released during said period of time.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |