Vehicle proximity alarm system and method
US7265665B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Oct 10, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2325/304
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object of the present invention is to provide a method of proximity detection based on transmitting at random intervals burst of a RF signal at a power level, and receiving, while not transmitting, a received RF signal. When detecting said received RF signal emitted by a target in range; an alarm signal is provided to warn of the proximity of the target. Another broad aspect of the invention is to deploy the above method among members of a territory and provide a monitoring patrol to verify if the proximity of those members can be detected from their RF signal. Another broad aspect of the invention is to provide to those members a plurality of status from which each member selects one corresponding to its current status and to transmit that status in the RF signal he is transmitting, thereby informing other members in range of his current status and enabling them to evaluate the potential danger associated with him.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.