Self-calibrating optical fiber pressure, strain and temperature sensors

dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.inventorZhao, Wei W.en
dc.contributor.inventorWang, Anboen
dc.contributor.inventorWang, Junen
dc.contributor.inventorXiao, Haien
dc.date.accessed2016-08-19en
dc.date.accessioned2016-08-24T17:54:10Zen
dc.date.available2016-08-24T17:54:10Zen
dc.date.filed1999-05-11en
dc.date.issued2000-05-30en
dc.description.abstractBroadband energy incident on a transducer having partially or fully reflective surfaces separated by a gap which is greater than the coherence length of the broadband energy but smaller than one-half a coherence length of a band of energy within said broadband energy causes a portion of the spectral content of the broadband energy corresponding to a coherence length greater than twice the gap length to exhibit interference effects while the average power of the broadband energy remains unaffected. Splitting energy reflected from the transducer into two beams which are filtered at preferably similar center frequencies but with different pass bands yields beams which are radically different in sensitivity to changes in gap length. Analyzing the beams to derive a ratio of powers (since source intensity and fiber attenuation in a common fiber are thus self-cancelling) allows high accuracy and high resolution absolute measurement of temperature, pressure or strain. Effects of any of these physical parameters which are not of interest in a measurement can be fully compensated or made arbitrarily insignificant in a simple transducer structure of extremely small size. Use of broadband energy permits measurement over greater lengths of optical fiber.en
dc.format.mimetypeapplication/pdfen
dc.identifier.applicationnumber9309660en
dc.identifier.patentnumber6069686en
dc.identifier.urihttp://hdl.handle.net/10919/72416en
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/86/696/060/0.pdfen
dc.language.isoen_USen
dc.publisherUnited States Patent and Trademark Officeen
dc.subject.cpcG01L1/242en
dc.subject.cpcG01D5/266en
dc.subject.cpcG01D5/268en
dc.subject.cpcG01K11/32en
dc.subject.uspc356/35.5en
dc.subject.uspcother356/477en
dc.subject.uspcother374/E11.015en
dc.titleSelf-calibrating optical fiber pressure, strain and temperature sensorsen
dc.typePatenten
dc.type.dcmitypeTexten
dc.type.patenttypeutilityen
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