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11. 发明申请

WO1997012210A1 FIBER OPTIC CATHETER FOR ACCURATE FLOW MEASUREMENTS 审中-公开
标题翻译：光纤传感器用于精确流量测量
公开(公告)号：WO1997012210A1
公开(公告)日：1997-04-03
申请号：PCT/SG1995000012
申请日：1995-12-14
申请人： TJIN, Swee, Chuan
IPC分类号： G01F01/66
CPC分类号： G01S7/4818 , A61B5/0261 , A61B5/027 , G01F1/661 , G01P5/26 , G01S17/58
摘要： An improved fibre optic sensor for remote flow measurements is disclosed. The sensor consists of two optical fibres (16, 18) placed parallel to each other with a reflective surface (32) (flat or concave) at the end. The fibres and the reflective surface are encased in a flexible tube (24) with an opening (28) in the side of the tube to allow light to be reflected through the opening into a measurement volume of the flow. The cavity created by this opening in the flexible tube is preferably filled with optical cement (34). This surface is polished so that it is flushed with the surface. Light is transmitted to the measurement volume from one of the optical fibres (Transmitting fibre) where it is scattered by scattering particles within this measurement volume. Part of backscatter light is collected by the other fibre (receiving fibre) and the backscatter signal is compared with the transmission signal to determine a Doppler shift.
摘要翻译：公开了用于远程流量测量的改进的光纤传感器。该传感器由两端彼此平行放置的光纤（16,18）组成，反射面（32）（平面或凹形）位于端部。纤维和反射表面被封装在具有在管侧的开口（28）的柔性管（24）中，以允许光通过开口反射成流量的测量体积。由柔性管中的该开口产生的空腔优选地填充有光学水泥（34）。该表面被抛光，使其与表面冲洗。光通过在该测量体积内的散射颗粒散射的光纤（发射光纤）中的一个传输到测量体积。反向散射光的一部分由另一光纤（接收光纤）收集，后向散射信号与传输信号进行比较，以确定多普勒频移。

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