Automotive mirror with integrated Loran components
US6539306B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Jun 15, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vehicle includes a mirror assembly comprising components of a Loran positioning system. The mirror assembly may include an H-field antenna, receiver circuitry, a processor, memory, or a user interface. The Loran system communicates received data with various other vehicle systems over a data bus. Location data obtained from the Loran system is used to ascertain vehicle location, speed, and heading. Further, data from the Loran system is used to improve the accuracy and availability of GPS positioning data and to calibrate the vehicle compass and odometer. The accuracy of GPS position estimates is improved by combining data from both positioning systems. The GPS data is further improved by differential GPS (DGPS) data received by the Loran positioning system and communicated to the GPS positioning system. The availability of the GPS is improved since less than four channels of satellite signals are needed when combined with the Loran signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.