Fasahar gano magana mai nisa ta Laser

Fasahar gano magana mai nisa ta Laser
LaserGanewar magana mai nisa: Bayyana tsarin tsarin ganowa

Ƙarƙashin katako na Laser yana rawa da kyau ta cikin iska, a shiru yana neman sautuna masu nisa, ƙa'idar da ke bayan wannan "sihiri" na fasaha na gaba yana da tsattsauran ra'ayi kuma cike da fara'a. A yau, bari mu ɗaga mayafin akan wannan fasaha mai ban mamaki kuma mu bincika tsarinta na ban mamaki da ƙa'idodinta. An nuna ka'idar gano muryar nesa ta Laser a cikin Hoto 1 (a). Tsarin gano murya mai nisa na Laser ya ƙunshi tsarin ma'aunin girgiza laser da maƙasudin ma'aunin girgiza ba tare da haɗin gwiwa ba. Dangane da yanayin gano yanayin dawowar haske, tsarin ganowa za a iya raba shi zuwa nau'in rashin tsangwama da nau'in tsangwama, kuma ana nuna zane-zane bi da bi a cikin Hoto 1 (b) da (c).

FIG. 1 (a) Toshe zane na gano murya mai nisa na Laser; (b) Zane-zane na tsarin ma'aunin jijjiga nesa ba interferometric Laser; (c) Tsarin tsari na tsarin ma'aunin jijjiga nesa na interferometric Laser

一. Tsarin gano rashin tsangwama Ganewar rashin tsangwama shine madaidaicin hali na abokai, ta hanyar isar da iska ta Laser na saman da ake niyya, tare da motsin da ba daidai ba na yanayin azimuth mai haskaka haske wanda ke haifar da canje-canje a ƙarshen karɓar ƙarfin haske ko speckle image. don auna madaidaicin ƙaramar girgizar ƙasa, sannan “miƙe zuwa madaidaiciya” don cimma gano siginar sauti mai nisa. Dangane da tsarin karbamai daukar hoto, Za'a iya raba tsarin rashin tsangwama zuwa nau'in maki guda da nau'in tsararru. Jigon tsarin maƙasudi ɗaya shine "sake gina siginar sauti", wato, ana auna firgita ta saman abu ta hanyar auna canjin ƙarfin gano mai ganowa wanda ya haifar da canjin yanayin dawowar haske. Tsarin madaidaici ɗaya yana da fa'idodin ƙarancin farashi, tsari mai sauƙi, babban ƙimar ƙima da sake gina siginar sauti na ainihi bisa ga ra'ayin mai gano hoto na yanzu, amma tasirin speckle laser zai lalata alaƙar madaidaiciya tsakanin girgizawa da ƙarfin haske mai ganowa. , don haka yana ƙuntata aikace-aikacen tsarin ganowa mara tsangwama mai lamba ɗaya. Tsarin tsararru yana sake gina girgizar ƙasa na manufa ta hanyar algorithm na sarrafa hoto ta speckle, ta yadda tsarin ma'aunin girgiza yana da ƙarfin daidaitawa ga ƙasa maras kyau, kuma yana da daidaito da hankali.

二. Tsarin gano tsangwama ya bambanta da rashin tsangwama ga rashin tsangwama, gano tsangwama yana da fara'a ta kai tsaye, ka'idar ita ce ta hanyar hasken laser na saman abin da aka yi niyya, maƙasudin manufa tare da axis na gani na ƙaura zuwa haske na baya. yana gabatar da canji na lokaci / mitoci, yin amfani da fasahar tsangwama don auna ma'auni na mitar / lokaci don cimma ma'auni na micro-vibration mai nisa. A halin yanzu, mafi ci-gaba fasahar gano interferometric za a iya raba iri biyu bisa ga ka'idar Laser Doppler jijjiga fasahar da Laser hanyar tsoma baki da kai dangane da m sautin siginar gano. Hanyar ma'aunin girgiza Laser Doppler yana dogara ne akan tasirin Doppler na Laser don gano siginar sauti ta hanyar auna ma'aunin motsi na Doppler wanda ya haifar da girgiza saman abin da ake nufi. Fasahar haɗin kai ta Laser tana auna ƙaura, saurin gudu, girgizawa da nisa na manufa ta hanyar barin wani ɓangare na hasken da ke haskakawa na nesa mai nisa don sake shigar da resonator na Laser kuma ya haifar da daidaita girman filin Laser da mita. Fa'idodinsa sun kasance cikin ƙananan girman da girman hankali na tsarin ma'aunin girgiza, dalow ikon Laserana iya amfani dashi don gano siginar sauti mai nisa. Ana nuna tsarin ma'auni mai haɗa kai da kai na Laser don gano siginar magana mai nisa a hoto na 2.

FIG. 2 Tsarin tsari na tsarin ma'aunin mitar-canza Laser mai haɗa kai

A matsayin ma'anar fasaha mai amfani da inganci, Laser "sihiri" wasa magana mai nisa ba zai iya kawai a fagen ganowa ba, a cikin fagen ganowa kuma yana da kyakkyawan aiki da aikace-aikace mai fa'ida - Laser interception countermeasure technology. Wannan fasaha za ta iya cimma matakan tsaka-tsakin matakin mita 100 a cikin gida, gine-ginen ofis da sauran wuraren bangon labulen gilashi, kuma na'ura guda ɗaya na iya kiyaye ɗakin taro yadda ya kamata tare da filin taga na murabba'in murabba'in 15, ban da saurin amsawa na dubawa. da sakawa a cikin dakika 10, babban matsayi daidai da ƙimar ƙima sama da 90%, da babban dogaro ga aikin kwanciyar hankali na dogon lokaci. Fasahar hana ma'aunin kutsawa ta Laser na iya ba da garanti mai ƙarfi ga amincin bayanan masu amfani a mahimmin ofisoshin masana'antu da sauran al'amuran.