Apparatus and method for actuating a passenger restraint system in a passenger vehicle
US5021678A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Nov 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/01332
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Apparatus and method are provided for actuating a passenger restraint system in a passenger vehicle. A sensor, such as an accelerometer, provides a vehicle condition signal indicative of a potential deployment condition suitable for actuating the restraint system. A first signal is provided so long as the value of the condition signal exceeds that of a first threshold level. An integrator is operative in response to the first signal for integrating the condition signal and providing an integrated signal. The integrator is normally operative to be reset upon termination of the first signal. A trigger signal is provided for actuating the restraint system when the value of the integrated signal exceeds that of a second threshold level. The integrator is prevented from being reset upon termination of the first signal once the first signal has had a time duration of at least time period T1. The integrator is reset after a time period T2 has taken place, wherein T2 had a duration greater than that of time period T1. Consequently, the integrator continues to integrate the condition signal during the interval between the termination of time period T1 and the termination of time period T2, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.