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    • 4. 发明申请
    • SYSTEM AND METHOD OF DISTRIBUTED FIBER OPTIC SENSING INCLUDING INTEGRATED REFERENCE PATH
    • 分布式光纤传感系统和方法,包括集成的参考路径
    • WO2013012495A2
    • 2013-01-24
    • PCT/US2012042401
    • 2012-06-14
    • BAKER HUGHES INCDUNCAN ROGERCHILDERS BROOKSCOUCH PHILIP ROBIN
    • DUNCAN ROGERCHILDERS BROOKSCOUCH PHILIP ROBIN
    • G01V8/16G01N21/17G01N21/84
    • G01V1/46G01D5/35316G01H9/004G01K11/3206G01L1/246G01L25/00G01V1/226
    • An apparatus for estimating a parameter includes: an optical fiber including at least one core configured to transmit an interrogation signal and including a plurality of sensing locations distributed along a measurement length of the optical fiber and configured to reflect light; a reference optical path configured to transmit a reference signal, the reference optical path disposed in a fixed relationship to the at least one core and extending at least substantially parallel to the at least one core, the reference optical path including a reference reflector that defines a cavity length corresponding to the measurement length; a detector configured to receive a reflected return signal; a reference interferometer configured to receive at least a reference signal and generate an interferometric reference signal; and a processor configured to apply the interferometric reference signal to the reflected return signal to compensate for one or more environmental parameters.
    • 一种用于估计参数的设备包括:光纤,其包括至少一个芯,所述芯被配置为传输询问信号并且包括沿所述光纤的测量长度分布并且被配置为反射光的多个感测位置; 参考光路径,被配置为传输参考信号,所述参考光路径与所述至少一个纤芯以固定关系布置,并且至少基本平行于所述至少一个纤芯延伸,所述参考光路径包括参考反射器,所述参考反射器限定 空腔长度对应于测量长度; 被配置为接收反射返回信号的检测器; 参考干涉仪,其经配置以接收至少参考信号且产生干涉参考信号; 以及处理器,被配置为将干涉参考信号应用于反射返回信号以补偿一个或多个环境参数。