Tekinoroji yekuona kutaura uri kure neLaser

Tekinoroji yekuona kutaura uri kure neLaser
Laserkuona kutaura kuri kure: Kuratidza chimiro chehurongwa hwekuona

Danda relaser rakatetepa rinotamba zvakanaka mumhepo, richitsvaga manzwi ari kure chinyararire, musimboti uri shure kweiyi "mashiripiti" ehunyanzvi hwemangwana unoshamisa uye uzere nekunaka. Nhasi, ngatisimudzei chifukidziro pane iyi tekinoroji inoshamisa uye tiongorore chimiro chayo chinoshamisa uye misimboti. Musimboti wekuona izwi rekure nelaser unoratidzwa muMufananidzo 1(a). Sisitimu yekuona izwi rekure nelaser inoumbwa nesisitimu yekuyera vibration yelaser uye chinangwa chekuyera vibration chisiri chekubatana. Zvichienderana nemaitiro ekuona kudzoka kwechiedza, sisitimu yekuona inogona kukamurwa kuita mhando isina kupindira uye mhando yekupindira, uye dhayagiramu yeskematiki inoratidzwa zvakateerana muMufananidzo 1(b) na (c).

Mufananidzo 1 (a) Dhayagiramu yebhuroko rekuona izwi riri kure nelaser; (b) Dhayagiramu yechirongwa chekuongorora masisitimu ekuyera vibration ari kure nelaser asiri e interferometric; (c) Dhayagiramu huru yesisitimu yekuyera vibration iri kure nelaser iri interferometric

一. Sisitimu yekuona isina kupindira Kuona kusina kupindira chinhu chakajeka cheshamwari, kuburikidza nemwaranzi yelaser pamusoro pechinhu chakanangana nacho, nekufamba kwechiedza chinoratidzwa neazimuth modulation zvichikonzera shanduko mumagumo ekugamuchira kwechiedza kana mufananidzo we speckle kuti upime zvakananga micro-vibration yenzvimbo yakanangana nayo, uye wobva "wakananga kune wakatwasuka" kuti uwane kuona kwechiratidzo che acoustic chiri kure. Zvichienderana nechimiro chekugamuchira.mudziyo wekuona foto, sisitimu isingapindire inogona kukamurwa kuita mhando yepoint imwe chete uye mhando yearray. Chinhu chikuru chechimiro chepoint imwe chete "kuvakwazve kwechiratidzo cheacoustic", kureva kuti, kudedera kwenzvimbo yechinhu kunoyerwa nekuyera shanduko yesimba rekuona chiedza che detector rinokonzerwa nekuchinja kwekutarisa kwechiedza chekudzoka. Chimiro chepoint imwe chete chine zvakanakira zvemutengo wakaderera, chimiro chiri nyore, chiyero chepamusoro chesampling uye kugadziriswazve kwechiratidzo cheacoustic panguva chaiyo zvichienderana nemhinduro ye detector photocurrent, asi laser speckle effect ichaparadza hukama hwakatsetseka pakati pe vibration nesimba re detector light, saka inorambidza kushandiswa kwe single-point non-interference detection system. Chimiro chearray chinovakazve kudedera kwenzvimbo yechinangwa kuburikidza ne speckle image processing algorithm, kuitira kuti vibration measurement system ive nekuchinja kwakasimba kune rough surface, uye ive nekururama kwakanyanya uye kunzwa.

Zvimwe. Sisitimu yekuona kupindira yakasiyana nekutadza kuona kupindira, kuona kupindira kune runako rwakanyanya kusajeka, musimboti uri kuburikidza nemwaranzi yelaser pamusoro pechinangwa, nzvimbo yekunangwa iri pedyo ne optical axis yekutama kuenda kuchiedza chekumashure inounza shanduko ye phase/frequency, kushandiswa kwetekinoroji yekupindira kuyera frequency shift/phase shift kuti uwane kuyerwa kwe micro-vibration kure. Parizvino, tekinoroji yepamusoro yekuona interferometric inogona kukamurwa kuita mhando mbiri zvichienderana ne musimboti we laser Doppler vibration measurement technology uye laser self-mixing interference method zvichibva pakuona remote acoustic signal. Nzira yekuyera vibration ye Laser Doppler yakavakirwa paDoppler effect ye laser kuti ione chiratidzo cheruzha nekuyera Doppler frequency shift inokonzerwa ne vibration yenzvimbo yekunangwa. Tekinoroji ye laser self-mixing interferometry inoyera displacement, speed, vibration uye daro rechinangwa nekubvumira chikamu chechiedza chinoratidzwa chechinangwa chiri kure kuti chipinde zvakare mu laser resonator uye kukonzera modulation ye laser field amplitude uye frequency. Zvakanakira zvayo zviri muhukuru hudiki uye kunzwa kwakanyanya kwesystem yekuyera vibration, uyelaser ine simba shomainogona kushandiswa kuona chiratidzo cheruzha chiri kure. Sisitimu yekuyera frequency-shift laser inosanganisa yega yekuona chiratidzo chekutaura chiri kure inoratidzwa muMufananidzo 2.

Mufananidzo 2. Dhiyagiramu yekuongorora yehurongwa hwekuyera hwe frequency-shift laser self-mixing

Senzira yehunyanzvi inobatsira uye inoshanda, "mashiripiti" e-laser anotamba kutaura kuri kure haangogone chete mukuona, asi mukuona kwekupokana anewo mashandiro akanaka uye anoshandiswa zvakanyanya - tekinoroji yekupokana ne-laser. Iyi tekinoroji inogona kuita zviyero zvekudzivirira zvekupokana zvemamita zana mudzimba, mahofisi nedzimwe nzvimbo dzemadziro egirazi, uye mudziyo mumwe chete unogona kuchengetedza imba yemusangano ine nzvimbo yehwindo ye15 square metres, kuwedzera pakumhanya kwekupindura nekukurumidza kwekuongorora nekumisa mukati memasekonzi gumi, kunyatsoona kwakakwirira kwe90%, uye kuvimbika kwakanyanya kwebasa rakagadzikana kwenguva refu. Tekinoroji yekupokana ne-laser inogona kupa vimbiso yakasimba yekuchengetedza ruzivo rweacoustic mumahofisi makuru eindasitiri nedzimwe nzvimbo.