Vehicle occupant characterization method based on the power spectrum of a seat sensor output signal
US7120527B2 · kind B2 · utility
4Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2004 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Nov 8, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R21/01556
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The occupant of a vehicle seat is characterized by computing a power spectrum function of data obtained from a seat sensor such as a pressure sensor in a fluid-filled seat bladder or a frame-mounted vertical accelerometer. The spectrum function is integrated over a specified frequency range, and compared to a threshold value that is calibrated to compensate for vehicle speed related variability. The presence of a cinched child seat is indicated when the threshold is exceeded, and the presence of a normally seated adult is indicated otherwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.