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Title:DIGITALNA PSEVDO HETERODINSKA DEMODULACIJA OPTIČNIH VLAKENSKIH FABRY-PEROTOVIH SENZORJEV
Authors:ID Vračko, Bojan (Author)
ID Đonlagić, Denis (Mentor) More about this mentor... New window
Files:.pdf MAG_Vracko_Bojan_2011.pdf (11,51 MB)
MD5: F324ACE832CE6BB0F527B24A158DA200
PID: 20.500.12556/dkum/be9d2968-5871-470f-a28f-61930e859779
 
Language:Slovenian
Work type:Master's thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:V magistrski nalogi je prikazan nov pristop k procesiranju signalov vlakenskih optičnih Fabry Perotovih senzorjev. Zasnovali smo ga na osnovi fazne modulacije optičnega signala in postopka, ki smo ga imenovali digitalna psevdo heterodinska demodulacija. Optični signal smo fazno modulirali s sestavljenim interferometrom, ki smo ga imenovali interferometer z usklajeno razliko optičnih poti. V elektronskem sklopu smo optični signal pretvorili v električni, ojačili, digitalizirali in z inovativnim postopkom digitalno obdelali. Rezultat obdelave signala je numerična vrednost, ki je sorazmerna z merjeno fizikalno veličino. Ker pa na rezultat vplivajo tudi nemerjene fizikalne veličine (npr časovno in termično lezenje delovnih točk posameznih komponent interferometra in elektronskih elementov), je potrebno te vplive prepoznati in jih s postopki stabilizacije ali kompenzacije odpraviti. Proces stabilizacije in kompenzacije vpliva nemerjenih fizikalnih veličin poteka hkrati s procesom interpretacije merjene veličine. Idejno zasnovo smo matematično analizirali in numerično modelirali. Izdelali smo fizični model in z meritvami potrdili pravilnost zasnove in pravilnost matematične analize in numeričnih modelov.
Keywords:interferometer, vlakenski optični Fabry-Perotov senzor, interferometer z usklajeno razliko optičnih poti, digitalna psevdo heterodinska demodulacija
Place of publishing:[Maribor
Publisher:B. Vračko]
Year of publishing:2011
PID:20.500.12556/DKUM-17523 New window
UDC:681.586:535(043)
COBISS.SI-ID:15072534 New window
NUK URN:URN:SI:UM:DK:JGMB0A3G
Publication date in DKUM:25.02.2011
Views:3638
Downloads:380
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Secondary language

Language:English
Title:DIGITAL PSEUDO HETERODYNE DEMODULATION OF FIBER OPTIC FABRY-PEROT SENSORS
Abstract:In my presented M.s. thesis the new approach for the demodulation of Fiber Optic Fabry-Perot sensor is presented. The design was based on the phase modulation of the optical signal and on the procedure that we called digital pseudo heteroyne demodulation. We used the Path matching Differential Interferometer for the phase modulation of the optical signal. After the opto-electrical conversion, amplification and digitalisation we used an innovative digital signal processing. The result of the signal processing is the numerical value which is proportional to measured phisical quantity. Since the result is influenced by meassured as well as unmeassured physical quantities (time or thermical drifts of optical an electronic components working points), we have to recognize those quantities and disable or compensate their influences. The process of stabilisation or compensation of the unmeasured physical quantity influences runs at the same time with the measured value interpretation process. We made the mathematical and numerical analysis of our concept and confirmed it with the created physical model.
Keywords:interferometer, fiber optic Fabry-Perot sensor, Path matching differential interferometer, digital pseudo heterodyne demodulation


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