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    • 3. 发明公开
    • 교통량 감지 및 모니터링 장치
    • 交通感测和监控装置
    • KR1020080059328A
    • 2008-06-26
    • KR1020087012393
    • 2006-10-18
    • 옵타센스 홀딩스 리미티드
    • 크릭모어,로저,이안힐,데이비드,존
    • G08G1/02G08G1/04E01F11/00G08G1/01
    • G08G1/02G01D5/35361
    • Traffic sensing and monitoring apparatus (100) comprises a length of optical fibre (112), means (102, 103, 104, 106, 107, 109, 119) arranged to introduce a series of pulse pairs into an input end of the length, each of the pulse pairs comprising first and second pulses of radiation having a frequency difference 7 and the second pulse being delayed with respect to the first by a delay d, and the apparatus further comprising a photodetector arranged to detect radiation which is Rayleigh-backscattered within the length of fibre towards the input end to generate an output signal in response thereto. Apparatus of the invention allows sensing and monitoring of traffic at any position along a long length of road (e.g. 5km) with lower installation and maintenance costs per unit length compared to prior art systems providing the same spatial resolution.
    • 交通感测和监测设备(100)包括一段长度的光纤(112),被布置成将一系列脉冲对引入长度的输入端的装置(102,103,104,106,107,109,119) 每个脉冲对包括具有频差7的第一和第二辐射脉冲,并且第二脉冲相对于第一脉冲延迟相对于第一脉冲延迟d,并且该装置还包括光电检测器,该光电检测器被布置成检测辐射内的瑞利反向散射 光纤朝向输入端的长度,以响应于此产生输出信号。 与提供相同空间分辨率的现有技术系统相比,本发明的装置允许在沿着长的道路(例如5km)的任何位置处感测和监测每单位长度的安装和维护成本。