Method for detecting approach and/or contact of the hand of a user close to a door handle of a motor vehicle, associated capacitive sensor and detection module
US10865590B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 28, 2017 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Mar 23, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960705
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for detecting the approach and/or contact of a user's hand close to a motor vehicle door handle. The handle including: an electrode having a capacitance, and a device for measuring the variation in capacitance, a low-frequency antenna situated close to the electrode, the emissions of the low-frequency antenna bringing about disturbances in the operation of the device for measuring the variation in the capacitance. The method proposes that a new adaptive approach detection threshold be calculated, depending on an average of the previous measured variations in the capacitance, calculated over a predetermined time interval, the measured variations being weighted by a factor depending on a difference between each measured variation and the average of the variations calculated previously over a previous predetermined time interval, the approach detection being confirmed if the measured variation is higher than the new adaptive threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.