Method for processing a presence signal in a hands-free vehicle access system having capacitive sensors
US9406179B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 19, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Oct 17, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/65
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Method for processing a presence signal in a hands-free vehicle access system having capacitive sensors. After starting steps constituted by nominal operation, switching to low-energy consumption mode, and switching to polling of an interrogation signal at nominal frequency, this method includes: presence testing with nominal polling; requesting the identity of the electronic key, transmitted via a central unit; detecting the presence of a hand on a handle transmitted via a capacitive sensor to the central unit; and authorizing the unlocking of the vehicle. The method includes a step of reducing the frequency of signals transmitted by the antenna of the central unit so as to switch into a “slow polling” test, such that the capacitive sensors have sufficient time intervals to test the central unit for the presence of a hand during the information step. The capacitive sensors then have greater availability to signal the presence of a hand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.