Optical sensor with co-located pressure and temperature sensors

An optical sensor ( 10 ) that provides for concurrent pressure and temperature measurements at substantially the same location includes at least one launch fiber ( 22 ) and at least one temperature sensitive material ( 52 ) having a refractive index that changes with a change in temperature. The lau...

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Bibliographische Detailangaben
Hauptverfasser:	BOYD CLARK D, CHILDERS BROOKS, BLEVINS DANIEL C, ZERWEKH PAUL S
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TARIFF METERING APPARATUS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	An optical sensor ( 10 ) that provides for concurrent pressure and temperature measurements at substantially the same location includes at least one launch fiber ( 22 ) and at least one temperature sensitive material ( 52 ) having a refractive index that changes with a change in temperature. The launch fiber and temperature sensitive material are spaced from each other across a gap ( 21 ) having length (L). A reflecting fiber ( 26 ) can be provided adjacent the temperature sensitive material. The optical sensor ( 10 ) also includes a sealed cavity ( 20 ). The launch fiber ( 22 ) and reflecting fiber ( 26 ) can be attached to the tube and at least partially disposed within the cavity. Changes in pressure change the length (L) of the gap ( 21 ).