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-interference ye-Non-interference Ukufunyanwa ngumlingisi othe ngqo wabahlobo, ngokusebenzisa i-laser irradiation yendawo ekujoliswe kuyo, kunye nentshukumo ye-oblique ye-modulation yokukhanya kwe-azimuth ebonakalisiweyo ekhokelela ekutshintsheni ekupheleni kokufumana ukukhanya kokukhanya okanye umfanekiso we-spekle ukulinganisa ngokuthe ngqo indawo ekujoliswe kuyo i-micro-vibration, kwaye emva koko "ithe tye ukuya ngqo" ukufumanisa isibonakaliso esikude. 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, isakhiwo esilula, isantya esiphezulu sesampuli kunye nexesha lokwenene lokwakhiwa kwakhona kwesignali ye-acoustic ngokwengxelo ye-detector photocurrent, kodwa umphumo we-laser speckle uya kutshabalalisa ubudlelwane bomgca phakathi kwe-vibration kunye ne-detector light intensity, ngoko ke inqanda ukusetyenziswa kwenkqubo yokufumanisa inqaku elilodwa. 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 ukuphazamisa yahlukile kwi-non-interference yobhaqo bluntness, ubhaqo wokuphazamiseka kune-charm engathanga ngqo, umgaqo-siseko nge-laser irradiation yobuso bethagethi, indawo ekujoliswe kuyo ecaleni kwe-axis ye-optical displacement ukuya ekukhanyeni kwangemva yazisa isigaba / utshintsho lwamaxesha, ukusetyenziswa kweteknoloji yokuphazamiseka ukulinganisa i-frequency shift / phase shift to achievement. 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 lokuqhawula ngaphakathi, izakhiwo zeofisi kunye nezinye iindawo zeglasi zodonga lwamakhethini, kunye nesixhobo esisodwa sinokukhusela ngokufanelekileyo igumbi lenkomfa kunye nommandla wefestile we-15 square metres, ukongeza kwisantya sokuphendula ngokukhawuleza sokuskena kunye nokubeka ngaphakathi kwemizuzwana ye-10, ukuchaneka kokubeka okuphezulu okungaphezulu kwe-90% yezinga lokuqaphela umsebenzi, kunye nokuthembeka kwexesha elide. I-Laser interception countermeasure technology inokubonelela ngesiqinisekiso esiqinileyo sokhuseleko lolwazi lwabasebenzisi kwiiofisi eziphambili zeshishini kunye nezinye iimeko.
Ixesha lokuposa: Oct-11-2024