Method enabling rapid and reliable triggering of vehicle occupant restraint systems by spectral frequency analysis of the acceleration signal
US5790404A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 14, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Dec 14, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/01322
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Triggering reliably within an extremely short time restraining features, for example, air bags, belt retractors, and other devices, that are provided in motor vehicles to offer a maximum degree of safety to vehicle occupants in the event of an accident, in which an acceleration signal is measured and converted into a speed signal by an integration over time and the speed signal is compared with a triggering threshold in order to determine a triggering criterion, wherein there is a provision for the integration of the acceleration signal (a) to be influenced as a function of a frequency analysis of the acceleration signal (a), wherein the acceleration signal is subjected to a spectral frequency analysis which influences a speed of the integration of the acceleration signal (a), and wherein the frequency analysis is carried out by utilizing a fast Fourier transformation (or the suboperations required from it).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.