Device and method for detecting a hand grasp with a two-zone sensor in the steering wheel
US12160234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2020 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Jun 4, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96078
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of operating a capacitive sensing device that includes exactly two electrically conductive antenna electrodes, which are placeable in two layers at a vehicle steering wheel rim, and a current measurement circuit for determining complex electric currents in the antenna electrodes. The method includes at least the following steps for constituting a measurement cycle: operating each one of the exactly two antenna electrodes in loading mode and determine the complex impedance of the respective antenna electrode; and generating a classification signal that is indicative of a present scenario, based on a fulfillment of at least one predetermined condition concerning at least one characteristic quantity of the first complex impedance as well as of the second complex impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.