Time of flight based passive entry/passive start system
US9894613B2 · kind B2 · utility
13Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 2016 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | May 25, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A passive entry-passive start portable device detection system. A portable device includes a transceiver. At least one vehicle-based transceiver broadcasts an interrogation signal. The transceiver of the portable device transmits a response signal in response to the interrogation signal. A controller determining at least a range of the portable device as a function of the time-of-flight of the interrogation and response signals. The controller controls a measurement duty cycle of the interrogation signal as a function of the determined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.