Laser tej thaj chaw deb hais lus nrhiav technology

Laser tej thaj chaw deb hais lus nrhiav technology
LaserTej thaj chaw deb nrhiav kom paub hais lus: nthuav qhia cov qauv ntawm kev kuaj pom

Ib tug nyias laser beam seev cev gracefully los ntawm cov huab cua, ntsiag to nrhiav rau cov suab nyob deb, lub hauv paus ntsiab lus qab no futuristic technological "magic" yog nruj me ntsis esoteric thiab tag nrho ntawm ntxim nyiam. Niaj hnub no, cia peb nqa daim ntaub thaiv ntawm no amazing technology thiab tshawb nrhiav nws cov qauv zoo thiab cov hauv paus ntsiab lus. Lub hauv paus ntsiab lus ntawm laser tej thaj chaw deb lub suab nrhiav pom nyob rau hauv daim duab 1(a). Lub laser tej thaj chaw deb lub suab nrhiav kom tau qhov system yog tsim los ntawm laser vibration ntsuas system thiab non-cooperative vibration ntsuas lub hom phiaj. Raws li hom kev kuaj pom ntawm lub teeb rov qab, qhov kev kuaj pom tuaj yeem muab faib ua hom tsis cuam tshuam thiab cuam tshuam, thiab daim duab schematic raws li qhia hauv daim duab 1(b) thiab (c).

FIG. 1 (a) Thaiv daim duab ntawm laser tej thaj chaw deb lub suab nrhiav kom tau; (b) schematic daim duab ntawm non-interferometric laser tej thaj chaw deb kev co ntsuas system; (c) Daim duab qhia ntawm interferometric laser tej thaj chaw deb kev co ntsuas qhov system

Ib. Non-interference detection system Non-interference detection is a very straightforward character of friends, los ntawm laser irradiation ntawm lub hom phiaj nto, nrog oblique motion ntawm lub reflected lub teeb azimuth modulation uas ua rau cov kev hloov nyob rau hauv lub kawg ntawm lub teeb siv los yog speckle duab. kom ncaj qha ntsuas lub hom phiaj ntawm micro-vibration, thiab tom qab ntawd "ncaj mus rau ncaj" kom ua tiav cov teeb liab acoustic tej thaj chaw deb. Raws li cov qauv ntawm qhov tau txaisphotodetector, cov txheej txheem tsis cuam tshuam tuaj yeem muab faib ua ib hom taw tes thiab hom array. Lub hauv paus ntawm cov qauv ntawm ib qho taw tes yog "kev tsim kho ntawm lub teeb liab acoustic", uas yog, qhov kev vibration ntawm cov khoom yog ntsuas los ntawm kev ntsuas qhov kev hloov ntawm lub teeb pom kev ntawm lub teeb pom kev zoo tshwm sim los ntawm kev hloov pauv ntawm lub teeb rov qab taw qhia. Cov qauv ib leeg muaj qhov zoo ntawm tus nqi qis, cov qauv yooj yim, tus qauv siab thiab kev tsim kho lub sijhawm tiag tiag ntawm cov teeb liab acoustic raws li cov lus pom zoo ntawm lub tshuab ntes photocurrent, tab sis cov nyhuv laser speckle yuav rhuav tshem cov kev sib raug zoo ntawm kev co thiab lub teeb pom kev. , yog li nws txwv tsis pub siv ib qho taw tes tsis cuam tshuam kev tshawb nrhiav qhov system. Cov qauv array reconstructs nto vibration ntawm lub hom phiaj los ntawm speckle duab ua algorithm, kom lub vibration ntsuas system muaj ib tug muaj zog adaptability rau qhov ntxhib nto, thiab muaj ntau dua qhov tseeb thiab rhiab heev.

二. Qhov kev cuam tshuam nrhiav pom qhov sib txawv ntawm qhov tsis cuam tshuam kev tshawb nrhiav bluntness, kev cuam tshuam kev cuam tshuam muaj kev cuam tshuam ntau dua, lub hauv paus ntsiab lus yog los ntawm laser irradiation ntawm qhov chaw ntawm lub hom phiaj, lub hom phiaj ntawm qhov chaw nyob ntawm qhov chaw kho qhov muag ntawm qhov txav mus rau sab nraub qaum. qhia txog theem / zaus hloov, siv cov cuab yeej cuam tshuam los ntsuas qhov zaus hloov pauv / theem hloov mus ua kom tiav qhov ntsuas qhov deb micro-vibration. Tam sim no, cov cuab yeej tshawb nrhiav interferometric ntau dua tuaj yeem muab faib ua ob hom raws li lub hauv paus ntsiab lus ntawm laser Doppler kev co ntsuas tshuab thiab laser nws tus kheej sib xyaw cuam tshuam txoj kev raws li cov chaw taws teeb acoustic nrhiav pom. Laser Doppler vibration ntsuas txoj kev yog ua raws li Doppler nyhuv ntawm laser los ntes lub suab teeb liab los ntawm kev ntsuas qhov Doppler zaus hloov los ntawm kev co ntawm qhov chaw ntawm lub hom phiaj. Lub laser self-mixing interferometry tshuab ntsuas qhov kev hloov pauv, ceev, kev co thiab kev ncua deb ntawm lub hom phiaj los ntawm kev tso cai rau ib feem ntawm lub teeb pom kev ntawm lub hom phiaj nyob deb kom rov nkag mus rau lub laser resonator thiab ua rau cov kev hloov pauv ntawm lub laser teb amplitude thiab zaus. Nws qhov zoo yog nyob rau hauv qhov me me thiab siab rhiab heev ntawm kev vibration ntsuas system, thiab covtsis muaj zog lasertuaj yeem siv los txheeb xyuas cov teeb liab suab paj nruag. Lub zaus-hloov laser nws tus kheej-tso ntsuas qhov system rau cov chaw taws teeb hais lus nrhiav pom tau pom hauv daim duab 2.

FIG. 2 Schematic daim duab ntawm zaus-hloov laser nws tus kheej ntsuas qhov system

Raws li kev siv tau zoo thiab siv tau zoo, laser "magic" ua si tej thaj chaw deb hais lus tsis tuaj yeem tsuas yog nyob rau hauv kev tshawb nrhiav, nyob rau hauv lub teb ntawm counter-detection kuj muaj kev ua tau zoo heev thiab dav daim ntawv thov - laser interception countermeasure technology. Cov thev naus laus zis no tuaj yeem ua tiav 100-meter qib kev cuam tshuam kev tiv thaiv hauv tsev, cov tsev ua haujlwm thiab lwm qhov chaw iav kab hlau rhuav phab ntsa, thiab ib qho cuab yeej tuaj yeem tiv thaiv chav sib tham nrog thaj tsam ntawm 15 square metres, ntxiv rau cov lus teb ceev ceev ntawm scanning. thiab muab tso rau hauv 10 vib nas this, qhov chaw siab qhov tseeb ntawm ntau dua 90% kev lees paub tus nqi, thiab kev ntseeg siab rau kev ua haujlwm ntev ntev. Laser interception countermeasure thev naus laus zis tuaj yeem muab kev lees paub zoo rau cov neeg siv 'acoustic cov ntaub ntawv kev ruaj ntseg hauv cov chaw ua haujlwm tseem ceeb hauv kev lag luam thiab lwm yam xwm txheej.