Sensor detection controller and occupant detection apparatus having the same
US8335617B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 8, 2011 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Sep 8, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2829
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A sensor detection controller is used in combination with a capacitive sensor that is mounted on a seat of a vehicle in such a manner that a capacitance of the capacitive sensor changes according to whether the seat is occupied. The sensor detection controller has a fault detection mode and a normal detection mode. The sensor detection controller includes a signal source for applying an amplitude signal to the capacitive sensor, a switch for switching a signal path, through which the amplitude signal is applied, between the fault detection mode and the normal detection mode, a signal detector for detecting a change in a voltage or a current of the amplitude signal when the amplitude signal is applied, and an impedance member connected to the signal path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.