公开(公告)号：US5115127A

公开(公告)日：1992-05-19

申请号：US585331

申请日：1990-09-17

Applicant: Lloyd C. Bobb ,  Barbara J. White ,  Jon P. Davis ,  Arthur Samouris

Inventor： Lloyd C. Bobb ,  Barbara J. White ,  Jon P. Davis ,  Arthur Samouris

IPC: G01J9/02 ,  G01M11/00 ,  G01N21/45 ,  G01N25/18

CPC classification number: G01M11/331 ,  G01M11/33 ,  G01N21/45 ,  G01N25/18 ,  G01J2009/0226 ,  G01J2009/0288

Abstract: A physical property of a fluid or of any optical fiber is measured using anptical fiber interferometer. A conductive material is disposed upon the surface of a region of a light tranmitting optical fiber and the region having the conductive material is disposed in the fluid. Light energy is applied to one end of the fiber and transmitted light is received at the other end of the fiber. Electrical energy is applied to the conductive material disposed upon the surface of the fiber to heat the region of the fiber and cause a change in the optical path length of the light transmitted through the fiber. The physical property of the fluid or optical fiber is determined in accordance with the change in the optical path length or phase of the received light caused by applying the electrical energy to the conductive material. Thermal conductivity is measured using a series of short energy pulses and determining the average phase change. The flow rate of a fluid is measured by measuring the phase change and applied electrical energy upon heating the fiber to an equilibrium temperature. The conductive material is gold and it encircles the fiber. The gold may be disposed on the jacket of the fiber or the jacket may be removed before disposing the gold.

Abstract translation: 使用光纤干涉仪测量流体或任何光纤的物理性质。 导电材料设置在光发射光纤的区域的表面上，并且具有导电材料的区域设置在流体中。 光能被施加到光纤的一端，透射光被接收在光纤的另一端。 将电能施加到设置在光纤表面上的导电材料，以加热光纤的区域并引起透过光纤的光的光程长度的变化。 根据通过将电能施加到导电材料而引起的接收光的光程长度或相位的变化来确定流体或光纤的物理性质。 使用一系列短能量脉冲测量热导率并确定平均相变。 通过在将纤维加热至平衡温度时测量相变和施加的电能来测量流体的流速。 导电材料是金，它包围纤维。 金可以设置在纤维的护套上，或者在处理金之前可以去除护套。