Ukadaulo wozindikira mawu akutali a laser

Ukadaulo wozindikira mawu akutali a laser
Laserkuzindikira mawu akutali: Kuwulula mawonekedwe a makina ozindikira

Mtsinje wopyapyala wa laser umavina mokoma mumlengalenga, kufunafuna mwakachetechete zomveka zakutali, mfundo yaukadaulo yamtsogolo iyi "matsenga" ndi esoteric komanso yodzaza ndi chithumwa. Lero, tiyeni tinyamule chophimba paukadaulo wodabwitsawu ndikuwunika mawonekedwe ake odabwitsa ndi mfundo zake. Mfundo yozindikiritsa mawu akutali a laser ikuwonetsedwa mu Chithunzi 1 (a). Dongosolo lozindikira mawu akutali la laser limapangidwa ndi makina oyezera kugwedezeka kwa laser ndi chandamale choyezera kugwedezeka kosagwira ntchito. Malingana ndi njira yodziwira kubwerera kwa kuwala, njira yodziwira ikhoza kugawidwa mu mtundu wosasokoneza ndi mtundu wosokoneza, ndipo chithunzi cha schematic chikuwonetsedwa mu Chithunzi 1 (b) ndi (c).

CHITH. 1 (a) Chojambula cha block cha kuzindikira kwa mawu akutali kwa laser; (b) Chiwonetsero cha schematic cha non-interferometric laser remote vibration measurement system; (c) Mfundo yachidule ya interferometric laser remote vibration measurement system

一. Kuzindikira kopanda kusokoneza Kuzindikira kopanda kusokoneza ndi mawonekedwe olunjika kwambiri a abwenzi, kudzera mu kuwala kwa laser pamalo omwe chandamale, ndikusuntha kowoneka bwino kwa mawonekedwe a azimuth owoneka bwino zomwe zimapangitsa kusintha pakulandila kwamphamvu ya kuwala kapena chithunzi chamatope. kuyeza mwachindunji chandamale pamwamba micro-kugwedera, ndiyeno “kuwongoka kuti mowongoka” kukwaniritsa kutali acoustic chizindikiro chizindikiro. Malinga ndi dongosolo la kulandiraPhotodetector, dongosolo losasokoneza likhoza kugawidwa mu mtundu umodzi wa mfundo ndi mtundu wamtundu. Pachimake cha mawonekedwe a mfundo imodzi ndi "kumanganso chizindikiro cha acoustic", ndiko kuti, kugwedezeka kwa pamwamba pa chinthucho kumayesedwa poyesa kusintha kwa mphamvu ya kuwala kwa detector chifukwa cha kusintha kwa kayendedwe ka kuwala kobwerera. Kapangidwe ka mfundo imodzi ili ndi zabwino zake zotsika mtengo, mawonekedwe osavuta, kuchuluka kwa zitsanzo komanso kukonzanso nthawi yeniyeni ya siginecha yamayimbidwe molingana ndi mayankho a detector photocurrent, koma mphamvu ya laser speckle idzawononga ubale wapakati pakati pa kugwedezeka ndi mphamvu ya detector. , kotero imaletsa kugwiritsa ntchito njira imodzi yodziwira zinthu zosasokoneza. Kapangidwe kameneka kamamanganso kugwedezeka kwapamwamba kwa chandamale kudzera mu algorithm yoyezera zithunzi za speckle, kotero kuti makina oyezera kugwedezeka azitha kusinthasintha kwambiri pamtunda, ndipo amakhala olondola kwambiri komanso okhudzidwa.

二. Dongosolo lozindikira zosokoneza ndi losiyana ndi kusazindikira kosasokoneza, kuzindikira kosokoneza kumakhala ndi chithumwa chosadziwika bwino, mfundoyi ndi kudzera mu kuwala kwa laser pamwamba pa chandamale, chandamale pamwamba pa optical axis ya kusamutsidwa kupita ku kuwala kumbuyo. imayambitsa kusintha kwa gawo / pafupipafupi, kugwiritsa ntchito ukadaulo wosokoneza kuyeza kusuntha kwafupipafupi / kusintha kwagawo kuti mukwaniritse kuyeza kwakutali kwa micro-vibration. Pakali pano, ukadaulo wodziwikiratu kwambiri wa interferometric ukhoza kugawidwa m'mitundu iwiri molingana ndi mfundo yaukadaulo woyezera kugwedezeka kwa laser Doppler ndi njira yosokoneza yosakanikirana ya laser yotengera kuzindikira kwakutali kwamayimbidwe. Njira yoyezera kugwedezeka kwa laser Doppler imachokera ku mphamvu ya Doppler ya laser kuti izindikire chizindikiro cha phokoso poyesa kusuntha kwafupipafupi kwa Doppler komwe kumachitika chifukwa cha kugwedezeka kwa chinthu chomwe mukufuna. Tekinoloje ya laser self-kusakaniza interferometry imayesa kusamuka, kuthamanga, kugwedezeka ndi mtunda wa chandamale mwa kulola gawo la kuwala kowonekera kwa chandamale chakutali kuti lilowenso mu laser resonator ndikupangitsa kusinthasintha kwa matalikidwe a laser field ndi ma frequency. Ubwino wake uli mu kukula kochepa komanso kukhudzika kwakukulu kwa dongosolo loyezera kugwedezeka, ndiotsika mphamvu laserangagwiritsidwe ntchito kuzindikira chizindikiro chakutali. Makina oyesera a frequency-shift laser self-mixing kuti azindikire mawu akutali akuwonetsedwa pa chithunzi 2.

CHITH. 2 Schematic chithunzi cha frequency-shift laser self-mixing measurement system

Monga njira yothandiza komanso yothandiza yaukadaulo, laser "matsenga" amasewerera mawu akutali osati pongodziwikiratu, m'malo ozindikira amakhalanso ndi magwiridwe antchito abwino kwambiri komanso kugwiritsa ntchito kwakukulu - ukadaulo wa laser interception countermeasure. Ukadaulo uwu ukhoza kukwaniritsa zoyeserera za mita 100 m'nyumba, nyumba zamaofesi ndi malo ena otchinga magalasi, ndipo chida chimodzi chimatha kuteteza bwino chipinda chamisonkhano chokhala ndi zenera la 15 masikweya mita, kuwonjezera pa liwiro la kuyankha mwachangu. ndi kuyika mkati mwa masekondi a 10, kulondola kwakukulu kwa malo oposa 90% kuzindikirika, ndi kudalirika kwakukulu kwa ntchito yokhazikika ya nthawi yayitali. Ukadaulo waukadaulo wa laser interception utha kupereka chitsimikizo champhamvu chachitetezo chazidziwitso za ogwiritsa ntchito m'maofesi akuluakulu amakampani ndi zochitika zina.