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Abstract

A fiberoptic fluid pressure transducer system involving a thin flat diaphragm, fiberoptic elements, a tubular member having an opening of fixed dimensions on the side thereof, an L-shaped cantilevered beam and a remotely located electronic control unit. The cantilevered beam has one leg horizontally attached to a recessed ledge surrounding the opening such that a vertical leg extending from the horizontal leg, including a light reflector, extends into the opening. A diaphragm covers the opening and makes physical contact with the horizontal leg of the L-shaped beam. Pressure applied to the diaphragm flexes the horizontal leg of the beam which, in turn, causes a spatial displacement of the vertical leg with respect to the fiberoptic elements. The resulting change in reception of the reflected light is proportional to the pressure applied to the diaphragm or membrane. The sensitivity of the transducer can be altered and the system can have two or more levels of sensitivity over a range of pressure measurements.

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First Claim