System and method of occupant detection with a resonant frequency
US8456177B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2012 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Aug 7, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2230/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An occupant detection system that includes an electrode arranged proximate to an expected location of an occupant for generating an electric field between the electrode and the occupant proximate thereto. An electrical network coupled to the electrode forms a resonant circuit that includes the occupant as part of the resonant circuit. A controller coupled to the resonant circuit is configured to determine a resonant frequency of the resonant circuit indicative of an occupant presence, and a network signal magnitude at the resonant frequency indicative of a humidity value proximate to the electrode. 7. A method for detecting a vehicle applies an excitation signal to the resonant circuit, determine a resonant frequency of the resonant circuit and determines a humidity value based on a network signal magnitude at the resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.