FIBRE OPTIC INTERFEROMETRIC TRANSDUCER OF STATIC AND DYNAMIC PRESSURE Russian patent published in 2015 - IPC G01L11/02 

FIELD: instrumentation.

SUBSTANCE: invention relates to measurement of static and dynamic pressure by optical interferometric circuits and optical fibres. Claimed transducer comprises laser light source, input optical fibre, encased pressure-sensitive membrane, output optical fibre and photoreceiver with photoelectric signal processor. Note here that intermediate double-surface fixed mirror arranged in the case central part is provided with top and bottom reflecting surfaces, top fixed mirror, input micro objective lens with light divider and output micro objective lens. Membrane bottom surface has a mirror coating while the transducer measuring leg is composed by the membrane mirror surface and that of the fixed intermediate mirror top surface. The transducer bearing leg is composed by the intermediate mirror bottom surface and bottom fixed mirror top surface. Note here that spacing between said membrane, double-surface intermediate mirror and bottom mirror is equal.

EFFECT: smooth adjustment of sensitivity and dynamic range.

2 cl, 2 dwg