FBG OPTICAL FIBER SENSOR TYPE CLINOMETER

PROBLEM TO BE SOLVED: To provide a FRB optical fiber sensor type clinometer, provided with the so-called "FRB system optical fiber sensor", capable of reducing total cost, involving setting, surely measuring various inclinations, preventing influence of fault, and the like, reducing the number of transmission cables laid, even in the case of simultaneous measurement over a wide region and increasing the maximum transmission distance by inventing a new inclination detecting structure. SOLUTION: This device is such that optical fibers have a detecting part made of FBG, arranged in the hollow storage part of a cylindrical clinometer body, of which each one end part is fixed on the upper wall of the hollow storage part at a prescribed interval and each another end part is suspended and fixed on both side faces of a pulley type rotating plate, respectively. A support part is arranged at substantially the center position of the pulley-type rotating plate which is set rotatable. A weight part is supported by the support part via connection plates, and the pulley-type rotating plate rotates, in linkage with the inclination of the weight part. COPYRIGHT: (C)2009,JPO&INPIT