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公开(公告)号：EP0508765A2
公开(公告)日：1992-10-14
申请号：EP92303144.7
申请日：1992-04-09
申请人： PEEK TRAFFIC LIMITED
CPC分类号： G01S7/023 , G01S13/343 , G01S13/58 , G01S13/931 , G08G1/08
摘要： In a vehicle presence detection system for controlling traffic signal lights at a road intersection, the vehicle detection is performed by targeting vehicles at the location of interest with an FMCW radar beam. The radar can be switched repeatedly between the FMCW mode, for vehicle presence detection, and a doppler mode, for vehicle movement detection. Signal data representing the background of the scene viewed by the radar beam are stored for use by circuitry that determines whether an apparent vehicle presence detect is a true vehicle detect ; the background signal data is repeatedly updated, as necessary, as the system cycles. Temperature compensation is provided and entry into the FMCW mode is inhibited if a voltage-controlled oscillator provided for generating the emissions has not settled down after any such compensation.
摘要翻译： 在用于控制道路交叉口处的交通信号灯的车辆存在检测系统中，通过用FMCW雷达波束对感兴趣的位置处的车辆进行车辆检测来执行车辆检测。 雷达可以在FMCW模式，车辆存在检测和多普勒模式之间重复切换，用于车辆移动检测。 表示由雷达光束观看的场景的背景的信号数据被存储以供确定视在车辆存在检测是真实车辆检测的电路使用; 随着系统循环，背景信号数据根据需要重复更新。 提供温度补偿，如果在任何此类补偿后提供用于产生排放的压控振荡器尚未结算，则禁止进入FMCW模式。
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公开(公告)号：EP0508765A3
公开(公告)日：1993-01-20
申请号：EP92303144.7
申请日：1992-04-09
申请人： PEEK TRAFFIC LIMITED
CPC分类号： G01S7/023 , G01S13/343 , G01S13/58 , G01S13/931 , G08G1/08
摘要： In a vehicle presence detection system for controlling traffic signal lights at a road intersection, the vehicle detection is performed by targeting vehicles at the location of interest with an FMCW radar beam. The radar can be switched repeatedly between the FMCW mode, for vehicle presence detection, and a doppler mode, for vehicle movement detection. Signal data representing the background of the scene viewed by the radar beam are stored for use by circuitry that determines whether an apparent vehicle presence detect is a true vehicle detect ; the background signal data is repeatedly updated, as necessary, as the system cycles. Temperature compensation is provided and entry into the FMCW mode is inhibited if a voltage-controlled oscillator provided for generating the emissions has not settled down after any such compensation.
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