FIBER-OPTIC PRESSURE TRANSDUCER (DESIGN VERSIONS) AND ITS MANUFACTURING PROCESS Russian patent published in 2000 - IPC

FIELD: instrumentation engineering. SUBSTANCE: transducer designed for measuring hydrostatic and rapidly varying pressure by means of optical devices is meant for industrial application in ground analyses of flying vehicles and small spacecraft, robotics, remote pressure monitoring (wells, tanks, cylinders), medicine, biology, hydroacoustics, and guard systems. Transducer of one design version has Fabry-Perot interferometer one of whose reflecting surfaces is formed by butt end of single-mode fiber optic conductor installed along the axis of first capillary tube and secured thereon. In addition, transducer has second capillary tube and flexible diaphragm mounted on one of its ends to form second reflecting surface of Fabry-Perot interferometer. First capillary tube is mounted and secured along the axis of second capillary tube on second butt-end side. According to second design version, reflecting surfaces of Fabry-Perot interferometer are formed by ends of fiber-optic conductors. One of the latter is single-mode conductor. Section of second optical conductor is secured in flexible diaphragm mounted on one butt-end side of second capillary tube. First capillary tube is mounted and secured along the axis of second capillary tube on its second butt end. EFFECT: improved sensitivity, thermal and vibration stability of transducer. 35 cl, 6 dwg