Vehicle speed sensor for navigation system
US7075459B1 · kind B1 · utility
25Cited by
25References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2000 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Feb 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C22/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vehicle navigation system includes a vehicle displacement sensor comprising a wireless transmitter generating a signal indicating rotational displacement of a vehicle component. A complementary wireless transmitter receives the signal from the transmitter. A computer calculates vehicle speed or displacement based upon the rotational speed or displacement of the vehicle component. In a preferred embodiment, the transmitter is secured to a wheel of the vehicle and generates an RF signal upon each revolution of the wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.