Double-electrode capacitive sensor, passenger detector, and passenger protection system
US7688204B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2008 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Nov 9, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2210/12
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A double-electrode capacitive sensor for detecting a detection object includes: an electrode assembly having first and second electrodes and an insulation substrate; and a detection circuit. The first and second electrodes are disposed on first and second surfaces of the substrate, respectively. The detection circuit applies an alternating voltage between a ground and the first electrode, and detects an electric potential of the second electrode, or controls the electric potential of the second electrode to follow the alternating voltage. The detection circuit detects a capacitance change between the first electrode and the ground when the detection object approaches the first electrode for determining whether the detection object approaches the first electrode. A periphery of the second electrode is substantially opposite to a periphery of the first electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.