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    • 3. 发明公开
    • Vehicle radar apparatus
    • 车辆雷达装置
    • EP1074853A2
    • 2001-02-07
    • EP00116897.0
    • 2000-08-04
    • HONDA GIKEN KOGYO KABUSHIKI KAISHA
    • Ashihara, Jun, c/o K. K. Honda Gijutsu KenkyushoSawamoto, Kiichirou, c/o K. K. Honda Gijutsu
    • G01S7/40G01S13/93
    • G01S13/931G01S7/4004G01S7/4056G01S7/497G01S17/936G01S2007/4039G01S2007/4047G01S2007/4091G01S2013/9325G01S2013/9353
    • In order to detect during travelling, an abnormality such as a drop in sensitivity, or a fault in a radar apparatus comprising a radar beam transmission device 30 and a reception device 40, and a processing unit 51 for detecting the position of a target object from transmission signals and reception signals, the processing unit 51 has a preceding vehicle judgment circuit 51a for judging if a vehicle travelling in front of a subject vehicle in the same direction is the same vehicle or not, and a signal strength comparing device 51c for comparing the signal strength of a current reception signal reflected from the preceding vehicle, with a signal strength of a reception signal reflected from the preceding vehicle a predetermined comparison reference time prior, to thereby calculate a change amount in signal strength. When the change amount calculated by the signal strength comparing device 51c drops beyond a previously set threshold value when it is judged by the preceding vehicle judgment device 51a that the preceding vehicle is the same vehicle, it is judged that the detection sensitivity of the radar apparatus has dropped.
    • 为了在行驶期间检测诸如灵敏度下降的异常或包括雷达波束发送装置30和接收装置40的雷达设备中的故障,以及处理单元51用于检测目标对象的位置 发送信号和接收信号,处理单元51具有前方车辆判断电路51a和信号强度比较装置51c,前方车辆判断电路51a用于判断在相同方向上在本车辆前方行驶的车辆是否是同一车辆, 将从前方车辆反射的当前接收信号的信号强度与从前方车辆反射的接收信号的信号强度预先比较预定的比较基准时间进行比较,从而计算信号强度的变化量。 当前方车辆判断装置51a判断前方车辆是同一车辆时,当由信号强度比较装置51c计算的变化量下降超过预先设定的阈值时,判断为雷达装置的检测灵敏度 已经下降。