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 komanso 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 khalidwe lolunjika kwambiri la abwenzi, kupyolera mu kuwala kwa laser kwa chandamale chandamale, ndi kayendetsedwe ka kuwala kowoneka bwino kwa azimuth kumapangitsa kusintha kwa kutha kwa kuwala kwamphamvu kapena chifaniziro cha timadontho kuti tiyeze mwachindunji chandamale pamwamba pa micro-vibration, ndiyeno "kuwongoka molunjika" kuti tipeze chidziwitso chakutali. 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. Mapangidwe a mfundo imodzi ali ndi ubwino wa mtengo wotsika, mawonekedwe osavuta, kuchuluka kwa zitsanzo ndi nthawi yeniyeni yomanganso chizindikiro cha acoustic malinga ndi ndemanga ya detector photocurrent, koma laser speckle effect idzawononga mgwirizano wapakati pakati pa kugwedezeka ndi mphamvu ya kuwala kwa detector, kotero imalepheretsa kugwiritsa ntchito njira yodziwira mfundo imodzi yosasokoneza. 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 kopanda kusokoneza, kuzindikira kosokoneza kuli ndi chithumwa chosadziwika bwino, mfundoyi ndi kudzera mu kuwala kwa laser pamwamba pa chandamale, chandamale pamwamba pa optical axis of displacement to displacement to the back light imayambitsa kusintha kwa gawo / pafupipafupi, kugwiritsa ntchito ukadaulo wosokoneza kuyeza pafupipafupi kusintha kwakutali / gawo la micro-gawo. 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. luso Izi akhoza kukwaniritsa 100-mita mlingo interceptions countermeasures m'nyumba, nyumba ofesi ndi malo ena galasi nsalu yotchinga khoma malo, ndi chipangizo chimodzi angathe kuteteza bwino chipinda msonkhano ndi zenera dera 15 lalikulu mamita, kuwonjezera pa liwiro poyankhapo sikani ndi udindo mkati masekondi 10, mkulu udindo kulondola oposa 90% mlingo kuzindikira kwa nthawi yaitali, ndi kudalirika mkulu. Ukadaulo waukadaulo wa laser interception utha kupereka chitsimikizo champhamvu chachitetezo chazidziwitso za ogwiritsa ntchito m'maofesi akuluakulu amakampani ndi zochitika zina.