Capacitance-based occupant detection system and occupant protection system
US8040241B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Mar 24, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2210/50
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A capacitance-based occupant detection system accurately determines seat occupancy and a failure of an electrode and between electrodes and includes an impedance calculation section, a Re/Im part calculation section, and a determination section. A first impedance Z1 is calculated including a main-body impedance Za between a main electrode and a vehicle body. The Re/Im part calculation section calculates real and imaginary parts of the first impedance Z1 based on the first impedance Z1 calculated by the impedance calculation section. The determination section determines the presence or absence of destruction of the main electrode and a guard electrode based on an imaginary part of the first impedance Z1 calculated by the Re/Im part calculation section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.