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    • 90. 发明授权
    • Method and apparatus for distributed sensing utilizing optical scattering in optical waveguides
    • 在光波导中利用光散射的分布式感测的方法和装置
    • US08203707B2
    • 2012-06-19
    • US11938781
    • 2007-11-13
    • Wei Xu
    • Wei Xu
    • G01J3/44
    • G01F23/292G01D5/35358G01F23/22
    • The present invention relates to a method and apparatus for distributed sensing utilizing optical scattering in optical waveguides and reveals two types of the invention. One type of the invention is to characterize optical scattering while actively controlling the temperature of the optical waveguide. The other type of the invention is to characterize optical scattering while strain/stress is induced into the optical waveguide through interaction of the jackets or coatings of the optical waveguide with objects under test. In one embodiment of the invention, the optical scattering based method and apparatus can sense liquid level, liquid distribution, and temperature gradient on ground and in low gravity. Other embodiments of the invention can detect location and concentration of liquid spill and gas leak along pipelines, or measure liquid or gas flow rates. Moreover, the method and apparatus described in the invention have capabilities of sensing multiple physical and chemical parameters using one sensing optical waveguide.
    • 本发明涉及利用光波导中光散射的分布式感测方法和装置,揭示了本发明的两种类型。 本发明的一种类型是在主动地控制光波导的温度的同时表征光散射。 本发明的另一种类型是表征光学散射,同时通过光波导的外套或涂层与被测对象的相互作用将应变/应力引入到光波导中。 在本发明的一个实施例中,基于光散射的方法和装置可以感测地面和低重力的液面,液体分布和温度梯度。 本发明的其他实施例可以检测液体泄漏的位置和浓度以及沿管道的气体泄漏,或者测量液体或气体流速。 此外,本发明中描述的方法和装置具有使用一个感测光波导感测多个物理和化学参数的能力。