FIBER-OPTICAL SENSOR SYSTEM Russian patent published in 2007 - IPC G01B9/00 

FIELD: electro-optical instrument engineering.

SUBSTANCE: fiber-optical sensor system can be used in structures of fiber-optical converters of physical values, which provide interference reading of signal measured (hydrophones, vibraphones, phonendoscopes etc.). Device has high coherence optical radiation laser source, interferometer sensor provided with sensitive membrane, two or more intensity amplifiers. Any intensity amplifier has fiber-optical coupler made of single-mode optical fibers, photodetector and electric signal amplifier; input of amplifier is connected with output of photodetector. Sensor is connected with second inputs of fiber-optical couplers. Outputs of coupler are connected with optical input of corresponding photodetector. First inputs of coupler are connected with optical radiation laser source through optical radiation divider. Device has selector, switch and average level electric signal four detectors. Outputs of amplifiers of image intensifier are connected with corresponding inputs of selector through detectors. Output of selector is connected with control input of switch. Information inputs of switch are connected with outputs of amplifiers of corresponding image intensifiers.

EFFECT: improved reliability of design; simplified conditions of exploitation.

2 cl, 5 dwg, 2 tbl