A Fiber Optic Pressure Transducer.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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A pressure transducer with an outside diameter of 0.190 inch has been built and statically tested. The transducer used a glass fiber bundle 0.109 inch in diameter to transmit and receive reflected light from a pressure diaphragm. The amount of light returned to a photosensor was dependent upon the diaphragm shape and relative position from the optic fiber bundle. The response was linear over a pressure range which was dependent upon the diaphragm thickness. Several fiber optic probes with different fiber distributions were tested. A theory was developed for a coaxial fiber distribution with the source light transmitted by the inner circle of fibers and operating with reflection from a flat surface. The theory provided a response curve shape which compared with the measured response. Author
- Test Facilities, Equipment and Methods