Vehicle security system with controller proximity sensor
US5334969A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R25/1009
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A car security system has a proximity sensor such as a radar sensor with variable sensitivity and capable of producing a detection signal upon detecting motion of a person in a monitoring area. A control circuit is provided controls the sensitivity of said proximity sensor. The system also has a monitoring/alarming control circuit for control of predetermined monitoring and alarming control on the basis of the output from the proximity sensor, and alarming devices such as a headlight flash circuit, buzzer and siren for performing a predetermined alarming operation under the control of the monitoring/alarming control circuit. The sensitivity control circuit operates in response to a predetermined operation such as an arming start operation to vary the sensitivity of the proximity sensor so as to automatically set the sensitivity to a first sensitivity level which is the highest level within a range which does not cause the sensor to produce the detection output. The monitoring/alarming control circuit determines that an abnormal state has occurred and performs a predetermined alarming control upon receipt of the detection signal from said proximity sensor after completion of setting…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.