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System and method for detecting obstacles within the area of a railroad grade crossing using a phase modulated microwave signal
System and method for detecting obstacles within the area of a railroad grade crossing using a phase modulated microwave signal
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机译:使用调相微波信号检测铁路平交道口区域内障碍物的系统和方法
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摘要
A system and method for automatically detecting the presence of an obstacle located within a surveillance area associated with a railroad grade crossing. The system includes a transmitter transmitting a signal through the surveillance area and a modulating reflector receiving the transmitted signal. The modulating reflector includes a phase modulator receiving the received signal and generating a phase modulated signal having a characteristic. The modulating reflector transmits the phase modulated signal through the surveillance area that is received by a receiver located to receive the phase modulated signal. The system further includes a processor coupled to the transmitter and to the receiver, the processor being configured to process the received phase modulated signal and to initiate an action as a function of the characteristic in the received phase modulated signal.
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