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公开(公告)号：US5164732A
公开(公告)日：1992-11-17
申请号：US446234
申请日：1989-12-05
CPC分类号： G07B15/063 , B61L25/04 , B61L25/048 , G06K19/07 , G06K19/0723 , G06K7/0008 , G07C9/00111 , G08G1/017
摘要： An antenna system for mounting in a roadway comprised of an electrically lossy material. The antenna system has a reflector trough shield filled with a solid dielectric. An antenna, preferably comprised of coaxial cable, is positioned in the reflector trough, which prevents electromagnetic waves radiated by the antenna from being lost into the roadway.
摘要翻译： 一种用于安装在由电耗损材料构成的道路中的天线系统。 天线系统具有填充有固体电介质的反射器槽屏蔽。 优选地由同轴电缆组成的天线被定位在反射器槽中，这防止由天线辐射的电磁波丢失到道路中。
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公开(公告)号：US5196846A
公开(公告)日：1993-03-23
申请号：US539703
申请日：1990-06-18
CPC分类号： G07B15/063 , B61L25/04 , B61L25/048 , G06K19/07 , G06K19/0723 , G06K7/0008 , G07C9/00111 , G08G1/017
摘要： A system for exchanging information by means of transmitted RF signals between a fixed location interrogator and a vehicle transponder moving in the vicinity of the interrogator. The transponder responds to a first trigger signal from the interrogator by transmitting to the interrogator a first data message derived from data stored in a transponder memory. The interrogator then remotely reprograms the transponder memory and generates a second trigger pulse. The transponder responds to the second trigger pulse by transmitting the reprogrammed data it then stores and the interrogator analyzes the last mentioned transmission to determine if the transponder properly received and responded to the reprogramming.
摘要翻译： 一种用于在固定位置询问器和在询问器附近移动的车辆转发器之间通过发送的RF信号来交换信息的系统。 应答器通过向询问器发送从存储在应答器存储器中的数据导出的第一数据消息来响应来自询问器的第一触发信号。 询问器然后远程重新编程应答器存储器并产生第二触发脉冲。 发送应答器通过发送其然后存储的重新编程数据来响应第二触发脉冲，询问器分析最后提到的传输，以确定应答器是否正确接收并对重新编程做出响应。
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