Impact detection system
US6392527B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1996 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Sep 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acceleration change detection system, which in a preferred embodiment is used as an impact detection system, detects whether a deflection sensor is deflected. The magnitude and/or direction of the impact may be considered. The system may include one or more than one deflection sensor. The invention may have particular use in a system that determines whether to deploy an air bag in a vehicle. The system may employ an open or enclosed chassis. The deflection sensors may deflect against deflection structures, which may be in various shapes. The deflection sensors have an electrical parameter (such as resistance) that changes upon deflection of the deflection sensor. In certain embodiments, the deflection sensor is ordinarily held in place by a movement inhibitor, which may include, for example, a magnetic, spring, clip, or stiff substrate. A large impact may create a force great enough to overcome the magnetic or mechanical force of the movement inhibitor. Deflection sensors may be arranged to detect movement in the x, −x, y, −y, z, and −z directions. Electrical circuitry may produce a voltage that is indicative of the change in resistance, which in turn is indica…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.