Apparatus and method for human presence detection in vehicles
US6370481B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jul 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/001
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for human presence detection in vehicles where a vehicle vibration sensor is provided to sense vehicle vibration. This vibration signal is processed to obtain a measure of vehicle vibration independent of vehicle damping. Also, a seismic sensor senses ground vibrations in the area of the vehicle simultaneously with the sensing of vehicle vibration, and if the ground vibration exceeds a first threshold, the measure of vehicle vibration is discarded. Similarly, an infrasonic sensor may be used to sense infrasonic wind vibrations adjacent to the vehicle simultaneously with the sensing of vehicle vibration. When the infrasonic vibration within a desired frequency range exceeds a second threshold value, the measure of vehicle vibration is discarded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.