发明名称 VEHICLE PROXIMITY ALARM SYSTEM AND METHOD
摘要 An object of the present invention is to provide a method of proximity detection based on transmitting at random intervals burst of an RF signal an d 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 aspect of the invention is t o deploy the above method among members of a territory and provide a monitorin g patrol to verify if the proximity of those members can be detected from thei r RF signal. Another aspect of the invention is to provide to those members a plurality of statuses among which each member selects one corresponding to i ts current status and transmits that status in the RF signal he transmits, thereby informing other members in range of his current status.
申请公布号 CA2519625(A1) 申请公布日期 2004.10.07
申请号 CA20042519625 申请日期 2004.03.26
申请人 RF ACTION DETECTION INC. 发明人 AUDET, JACQUES;BOUCHARD, MICHEL;BERGERON, ALAIN
分类号 G01S1/68;G01S13/82;G08B13/14;(IPC1-7):G08B21/02;G08G1/16;G08B21/22 主分类号 G01S1/68
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