Itekhnoloji yokubona intetho ekude nge-laser

Itekhnoloji yokubona intetho ekude nge-laser
Ilezaukufunyanwa kwentetho ekude: Ukutyhila ulwakhiwo lwenkqubo yokufunyanwa

Umqadi welaser obhityileyo udanisa kakuhle emoyeni, ukhangela isandi esikude ngokuthula, umgaqo ongasemva kwale "milingo" yetekhnoloji yekamva uyinto engaqhelekanga kwaye izele luthando. Namhlanje, masiphakamise isigqubuthelo kule teknoloji imangalisayo kwaye sihlolisise isakhiwo sayo esimangalisayo kunye nemigaqo yayo. Umgaqo wokuchonga ilizwi elikude ngelaser uboniswe kuMfanekiso 1(a). Inkqubo yokuchonga ilizwi elikude ngelaser yenziwe yinkqubo yokulinganisa ukudlidliza ngelaser kunye nenjongo yokulinganisa ukudlidliza engasebenziyo. Ngokwendlela yokufumanisa ukubuya kokukhanya, inkqubo yokufumanisa inokwahlulwahlulwa ngohlobo olungaphazanyiswayo kunye nohlobo lokuphazamiseka, kwaye umzobo weskimu uboniswe ngokulandelanayo kuMfanekiso 1(b) kunye (c).

UMZOBO 1 (a) Umzobo webhloko wokuchonga ilizwi elikude nge-laser; (b) Umzobo weskimu wenkqubo yokulinganisa ukungcangcazela kwe-laser ekude engeyiyo i-interferometric; (c) Umzobo oyintloko wenkqubo yokulinganisa ukungcangcazela kwe-laser ekude e-interferometric

一. Inkqubo yokubona ukungaphazanyiswa Ukufunyanwa okungaphazanyiswa luphawu olulula kakhulu lwabahlobo, ngokusebenzisa imitha yelaser yomphezulu ekujoliswe kuwo, kunye nentshukumo ecacileyo ye-azimuth yokukhanya okubonakalisiweyo okukhokelela kutshintsho kwisiphelo sokufumana ukukhanya okanye umfanekiso we-speckle ukulinganisa ngokuthe ngqo ukungcangcazela komphezulu ekujoliswe kuwo, uze emva koko "uqonde ngqo" ukuze kufunyanwe ukubonwa kwesignali ye-acoustic ekude. Ngokwesakhiwo sokwamkelaisixhobo sokubona iifoto, inkqubo yokungaphazamisi inokwahlulwa ibe ludidi lwenqaku elinye kunye nohlobo lwe-array. Isiseko sesakhiwo senqaku elinye "kukwakhiwa kwakhona kwesignali ye-acoustic", oko kukuthi, ukungcangcazela komphezulu wento kulinganiswa ngokulinganisa utshintsho lokukhanya kokufumanisa kwesitshisi okubangelwa kukutshintsha kwendlela yokukhanya okubuyela ngayo. Isakhiwo senqaku elinye sineengenelo zexabiso eliphantsi, isakhiwo esilula, izinga eliphezulu lokuvavanya kunye nokwakhiwa kwakhona kwesignali ye-acoustic ngexesha langempela ngokwempendulo ye-detector photocurrent, kodwa isiphumo se-laser speckle siya kutshabalalisa ubudlelwane obuchanekileyo phakathi kokungcangcazela kunye nokukhanya kwesitshisi, ngoko ke sithintela ukusetyenziswa kwenkqubo yokufumanisa ukungaphazamisi kwenqaku elinye. Isakhiwo se-array sakha kwakhona ukungcangcazela komphezulu wethagethi nge-algorithm yokucubungula umfanekiso we-speckle, ukuze inkqubo yokulinganisa ukungcangcazela ibe nokuzivumelanisa okunamandla nomphezulu orhabaxa, kwaye ibe nokuchaneka okuphezulu kunye novakalelo.

Kwakhona. Inkqubo yokufumanisa ukuphazamiseka yahlukile kwi-non-interference detection buntness, i-interference detection ine-charm engangqalanga, umgaqo kukusebenzisa i-laser radiation kumphezulu we-target, umphezulu we-target ecaleni kwe-optical axis yokufuduka ukuya ekukhanyeni kwangasemva kwazisa utshintsho lwesigaba/frequency, ukusetyenziswa kwe-interference technology ukulinganisa i-frequency shift/phase shift ukuze kufezekiswe umlinganiselo we-micro-vibration ekude. Okwangoku, i-interferometric detection technology ephucukileyo inokwahlulwa ibe ziintlobo ezimbini ngokwemigaqo ye-laser Doppler vibration measurement technology kunye ne-laser self-mixing interference method esekelwe kwi-remote acoustic signal detection. I-Laser Doppler vibration measurement method isekelwe kwi-Doppler effect ye-laser ukufumanisa isandi ngokulinganisa i-Doppler frequency shift ebangelwa kukungcangcazela komphezulu wento ekujoliswe kuyo. I-laser self-mixing interferometry technology ilinganisa i-displacement, isantya, i-vibration kunye nomgama we-target ngokuvumela inxalenye yokukhanya okubonakalisiweyo kwe-target ekude ukuba iphinde ingene kwi-laser resonator kwaye ibangele i-modulation ye-amplitude kunye ne-frequency ye-laser field. Iingenelo zayo zikwisayizi encinci kunye novakalelo oluphezulu lwenkqubo yokulinganisa ukungcangcazela, kunyei-laser enamandla aphantsiingasetyenziselwa ukubona isandi esikude. Inkqubo yokulinganisa i-frequency-shift laser yokuzixuba ngokwayo yokufumanisa isibonakaliso sentetho esikude iboniswe kuMfanekiso 2.

UMZOBO 2 Umzobo wesicwangciso senkqubo yokulinganisa i-frequency-shift laser self-mixing system

Njengendlela yobuchwephesha eluncedo nesebenzayo, i-laser "magic" idlala intetho ekude ayinakukwazi kuphela kwicandelo lokufumanisa, kwicandelo lokufumanisa kwakhona ikwanokusebenza okugqwesileyo kunye nokusetyenziswa okubanzi - iteknoloji yokulinganisa ukuthintela ukuthintela nge-laser. Le teknoloji inokufikelela kwimilinganiselo yokulinganisa ukuthintela ukuthintela kwinqanaba leemitha ezili-100 ngaphakathi, kwizakhiwo zeeofisi nakwezinye iindawo zodonga lweglasi, kwaye isixhobo esinye sinokukhusela ngokufanelekileyo igumbi leenkomfa elinendawo yefestile ye-15 square metres, ukongeza kwisantya sokuphendula ngokukhawuleza sokuskena kunye nokubeka kwindawo ngaphakathi kwemizuzwana eli-10, ukuchaneka okuphezulu kokubeka indawo okungaphezulu kwe-90% yezinga lokuqondwa, kunye nokuthembeka okuphezulu komsebenzi ozinzileyo wexesha elide. Itekhnoloji yokulinganisa ukuthintela ukuthintela nge-laser inokubonelela ngesiqinisekiso esinamandla sokhuseleko lolwazi lwe-acoustic lwabasebenzisi kwiiofisi eziphambili zoshishino nakwezinye iimeko.