Itekhnoloji yokufumanisa intetho ekude ngeLaser

Itekhnoloji yokufumanisa intetho ekude ngeLaser
ILaserubhaqo lwentetho ekude: Ukutyhila ubume bendlela yokubona

Umqa welaser obhityileyo udanisa kamnandi emoyeni, ukhangela isandi esithe cwaka, umgaqo osemva kobu buchwephesha bekamva "umlingo" ungqongqo kwaye ugcwele umtsalane. Namhlanje, masiphakamise isigqubuthelo kule teknoloji imangalisayo kwaye siphonononge isakhiwo sayo esihle kunye nemigaqo. Umgaqo wokufunyanwa kwelizwi elikude lelaser uboniswe kuMfanekiso 1 (a). I-laser ye-remote voice yokubona inkqubo yenziwe nge-laser vibration measurement system kunye ne-non-cooperative vibration measurement target. Ngokwendlela yokufumanisa ukubuyiswa kokukhanya, inkqubo yokukhangela inokwahlulwa ibe luhlobo olungaphazamisiyo kunye nohlobo lokuphazamiseka, kwaye umzobo weskimu uboniswa ngokulandelelana kuMfanekiso 1 (b) kunye (c).

IKHIWANE. 1 (a) Idayagram yebhloko ye-laser yokufumanisa ilizwi elikude; (b) Idayagram ecwangcisiweyo ye-non-interferometric laser yeremote yokulinganisa ukungcangcazela; (c) Umzobo womgaqo wenkqubo yokulinganisa i-interferometric laser remote vibration

一. Inkqubo yokufumanisa i-non-interference Ukufunyanwa kwe-non-interfection yimpawu ecacileyo kakhulu yabahlobo, ngokusebenzisa i-laser irradiation yendawo ekujoliswe kuyo, kunye nokunyakaza kwe-oblique ye-modulation yokukhanya ebonakalisiweyo ye-azimuth ekhokelela ekutshintsheni ekupheleni kokufumana ukukhanya kokukhanya okanye umfanekiso we-spekle. ukulinganisa ngokuthe ngqo i-micro-vibration ekujoliswe kuyo, kwaye emva koko "ngqo ukuya kuthi tye" ukuphumeza ubhaqo olukude lophawu lwe-acoustic. Ngokwesakhiwo sokufumanaifotodetector, inkqubo engaphazamisiyo inokwahlulwa ibe luhlobo lwenqaku elinye kunye nohlobo loluhlu. Ingundoqo yesakhiwo se-single-point "ukwakhiwa kwakhona kwesignali ye-acoustic", oko kukuthi, i-vibration ye-surface yento ilinganiswa ngokulinganisa utshintsho lwe-detector ye-detector yokukhanya ukukhanya okubangelwa ukuguqulwa kokubuyela ekukhanyeni ukukhanya. Isakhiwo sendawo enye sineenzuzo zexabiso eliphantsi, ulwakhiwo olulula, isantya esiphezulu sesampulu kunye nokwakhiwa kwakhona kwexesha lokwenyani lomqondiso we-acoustic ngokwengxelo ye-detector photocurrent, kodwa isiphumo se-laser speckle siya kutshabalalisa ubudlelwane obuphakathi phakathi kwe-vibration kunye ne-detector intensity light. , ngoko ke inqanda usetyenziso lwenkqubo yokubona indawo enye engaphazamisiyo. Ulwakhiwo lwe-array luphinda lwakha ukungcangcazela komphezulu wethagethi nge-algorithm yokusetyenzwa kwe-spekle, ukuze inkqubo yokulinganisa i-vibration ibe nokuguquguquka okuqinileyo kumphezulu orhabaxa, kwaye inokuchaneka okuphezulu kunye novakalelo.

二. Inkqubo yokukhangela ukuphazamiseka ihluke kwi-non-interference yokufumanisa ukungahambi kakuhle, ukufumanisa ukuphazamiseka kunomtsalane ongathanga ngqo, umgaqo-siseko ngokusebenzisa i-laser irradiation ebusweni benjongo ekujoliswe kuyo, indawo ekujoliswe kuyo kunye ne-axis optical of displacement ukuya ekukhanyeni kwangasemva. yazisa isigaba / utshintsho lwamaxesha, ukusetyenziswa kweteknoloji yokuphazamiseka ukulinganisa ukutshintshwa kwamaxesha / ukutshintshwa kwesigaba ukuphumeza umlinganiselo we-micro-vibration ekude. Okwangoku, itekhnoloji yokufumanisa i-interferometric ephucuke ngakumbi inokohlulwa ibe ziindidi ezimbini ngokomgaqo wetekhnoloji yokulinganisa i-laser Doppler kunye ne-laser self-mixing interference method esekwe ekubhaqweni kophawu olukude lwe-acoustic. Indlela yokulinganisa i-Laser Doppler ye-vibration isekelwe kwimpembelelo ye-Doppler ye-laser ukufumanisa umqondiso wesandi ngokulinganisa i-Doppler frequency shift okubangelwa ukungcangcazela komphezulu wento ekujoliswe kuyo. I-laser self-mixing interferometry iteknoloji ilinganisa ukufuduka, isantya, ukungcangcazela kunye nomgama wethagethi ngokuvumela inxalenye yokukhanya okubonakalisiweyo kwethagethi ekude ukuba iphinde ingene kwi-laser resonator kwaye ibangele ukumodareyithwa kwe-laser field amplitude kunye nokuphindaphinda. Izibonelelo zayo zilele kubungakanani obuncinci kunye novakalelo oluphezulu lwenkqubo yokulinganisa i-vibration, kunye nei-laser yamandla aphantsiingasetyenziselwa ukukhangela isignali yesandi esikude. Inkqubo yokulinganisa i-frequency-shift laser self-mixing yokufumanisa umqondiso wentetho ekude iboniswe kuMfanekiso 2.

IKHIWANE. 2 I-Schematic diagram ye-frequency-shift laser self-mixing measurement system

Njengendlela eluncedo kunye neyobuchule bezobugcisa, i-laser "umlingo" idlala intetho ekude ayikwazi kuphela kwintsimi yokufumanisa, kwintsimi ye-counter-detection nayo inomsebenzi ogqwesileyo kunye nesicelo esibanzi - iteknoloji ye-laser interception countermeasure. Le teknoloji inokufikelela kwiimitha ezili-100 zokulinganisa inqanaba lokuthintela ngaphakathi, izakhiwo zeofisi kunye nezinye iindawo zodonga lwamakhethini eglasi, kunye nesixhobo esisodwa sinokukhusela ngokufanelekileyo igumbi lenkomfa kunye nommandla wefestile we-15 square metres, ukongeza kwisantya sokuphendula ngokukhawuleza sokuskena. kunye nokubeka phakathi kwemizuzwana ye-10, ukuchaneka kokubeka okuphezulu okungaphezulu kwe-90% yezinga lokuqaphela, kunye nokuthembeka okuphezulu komsebenzi ozinzileyo wexesha elide. I-Laser interception countermeasure technology inokubonelela ngesiqinisekiso esiqinileyo sokhuseleko lolwazi lwabasebenzisi kwiiofisi eziphambili zeshishini kunye nezinye iimeko.