INTERFERENCE OPTICAL FIBER SENSOR SYSTEM

PROBLEM TO BE SOLVED: To improve a phase shift speed for enabling signal demodulation.SOLUTION: An interference optical fiber sensor system comprises: a pulse light source 1 for outputting pulse light; an interferometry 5 that includes a sensing fiber 11a for detecting a physical amount and a delay...

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1. Verfasser:	SATO RYOTAKU
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve a phase shift speed for enabling signal demodulation.SOLUTION: An interference optical fiber sensor system comprises: a pulse light source 1 for outputting pulse light; an interferometry 5 that includes a sensing fiber 11a for detecting a physical amount and a delay compensation fiber 30a having the same propagation delay time (τd) as the sensing fiber 11a, and causes interference of the pulse light from the pulse light source 1; and a detection part for detecting a signal corresponding to the physical amount by sampling interference light from the interferometry 5. The pulse light source 1 outputs the pulse light at a cycle shorter than the propagation delay time (τd) corresponding to time from input of the pulse light to the sensing fiber 11a to output thereof, and the detection part samples the interference light at a cycle shorter than the propagation delay time (τd) of the sensing fiber 11a.