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dc.creatorTaylor, Henry F.
dc.creatorSadkowski, Roberto
dc.creatorLee, Chung E.
dc.date.accessioned2019-06-17T16:54:48Z
dc.date.available2019-06-17T16:54:48Z
dc.date.issued1996-09-17
dc.identifier.urihttp://hdl.handle.net/1969.1/176548
dc.description.abstractApparatus and method (10, 50) for determining the value of a measurand measured by a fiber optic interferometer sensor (24, 72, 110) is provided. The apparatus includes a light source (16, 58, 102) emitting a light having a periodically modulated frequency which is injected into the interferometric sensor. A modulation cycle is initiated by the microcontroller's (12, 56, 116) generation of a trigger signal. A counter (42, 86) begins counting in response to the trigger signal. A first photodetector (20, 66) is coupled to the light source (16, 58, 102) and produces a first electrical signal proportional to the light. A second photodetector (36, 76, 114) is coupled to the fiber optic interferometer sensor (24, 72, 110) and produces a second electrical signal proportional to the light reflected by the sensor or passed through the sensor and affected by the measurand. A comparator (40, 82, 116) compares the second electrical signal with the first electrical signal and detects a crossing of the first and second electrical signals. The counter (42, 86) stops counting in response to a detected signal crossing. The microcontroller (12, 56, 116) then computes a measurand value from the count value for each modulation cycle.en
dc.languageeng
dc.publisherUnited States. Patent and Trademark Office
dc.rightsPublic Domain (No copyright - United States)en
dc.rights.urihttp://rightsstatements.org/vocab/NoC-US/1.0/
dc.titleSignal conditioning unit for fiber optic sensorsen
dc.typeUtility patenten
dc.format.digitalOriginreformatted digitalen
dc.description.countryUS
dc.contributor.assigneeThe Texas A&M University System
dc.identifier.patentapplicationnumber08/395448
dc.subject.uspcprimary356/477
dc.subject.uspcother250/227.27
dc.subject.uspcother356/480
dc.date.filed1995-02-28
dc.publisher.digitalTexas A&M University. Libraries


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