半導(dǎo)體激光自混合干涉測(cè)振儀調(diào)制與解調(diào)技術(shù)的研究.pdf

1、南京師范大學(xué)碩士學(xué)位論文半導(dǎo)體激光自混合干涉測(cè)振儀調(diào)制與解調(diào)技術(shù)的研究姓名：張小元申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：光學(xué)工程指導(dǎo)教師：王鳴20090424IIAbstractAbstractTheselfmixingeffectcomesfromtheopticalfeedbackeffect.Peoplealwaystriedtoeliminatetheopticalfeedbackeffectpreviously.Graduallypeopl

2、ebegantomakeuseofitactivelytomeasuresomephysicalquantitiesthusselfmixinginterferencetechnologywasbroughtfth.Thispaperstudiesthemodulationtechniquedemodulationtechniqueoftheselfmixinginterferencesemiconductlaservibrometer

3、.BasedontheacteristicsofLaserselfmixinginterferencetechnologesfrequencymodulationsystemwillbeintroducedintheselfmixinginterferencetoachievetheobjectsofthenoncontactvibrationmeasurement.Thepaperintroducethetheyofthevibrat

4、ionmeasureusinglaserselfmixinginterference，whichmainlyincludesvibrationselfmixinginterferencemodelselfmixinginterferencesignaldemodulationrecoveryofthevibrationwavefms.Selfmixinginterferencevibrometersystemisdesigneditis

5、mainlyaboutthedesignofopticalinstrumentsystemthedesignofSignalmodulationmodulethedesignofdemodulatmodulethedesignofsignalacquisitionprocessingmodulebasingonDSPsystem.ThedesignofSignalmodulationmoduleincludingthedesignofD

6、DSsignalsourcewhichisbaseonFPGAthedesignofmodulationcircuitprotectioncircuit.DemodulationModularincludingPDcurrentvoltageconversioncircuitdesignamplifiercircuitdesignaswellasdifferentialcircuitdesign.Thisinstrumentwhichi

7、ssmalllowcosteasytocollimatepossiblytobeusedtononcontactsurveycansurveytheobjectwhosevibrationfrequencyrangeis0arrives50KHzthevibrationscopemeasuringaccuracymayachieve0.325micronthefrequencyprecisionis1Hz.Practiceshowsth

8、atthissemiconductlaserselfmixingvibrometercangetgoodvibrationwavefmvibrationparametersfromthevibrationsource.Thevibrometercankeeplongtermstableoperationisabletomeettherealtimehighprecisionrequirements.Thevibrometercandev