Nkhani - Sensa ya dTOF: Mfundo yogwira ntchito ndi zigawo zikuluzikulu.

Lembetsani ku Social Media Yathu Kuti Mutumize Posachedwa

Ukadaulo wa Direct Time-of-Flight (dTOF) ndi njira yodziwiratu nthawi yowuluka, pogwiritsa ntchito njira ya Time Correlated Single Photon Counting (TCSPC). Tekinoloje iyi ndiyofunikira pakugwiritsa ntchito zosiyanasiyana, kuyambira pakuyandikira kwamagetsi ogula mpaka makina apamwamba a LiDAR pamagalimoto amagalimoto. Pakatikati pake, machitidwe a dTOF amakhala ndi zigawo zingapo zofunika, chilichonse chimagwira ntchito yofunikira pakuwonetsetsa kuti muyeso wolondola wa mtunda uyenera kuchitika.

Zofunika Kwambiri za dTOF Systems

Laser Driver ndi Laser

Dalaivala wa laser, gawo lofunikira kwambiri pamayendedwe otumizira, amapanga ma siginecha a digito kuti aziwongolera kutulutsa kwa laser kudzera pakusintha kwa MOSFET. Laser, makamakaVertical Cavity Surface Emitting Lasers(VCSELs), amakondedwa chifukwa cha mawonekedwe awo opapatiza, kuchulukira kwamphamvu, kusinthasintha kwachangu, komanso kuphatikiza kosavuta. Kutengera kugwiritsa ntchito, mafunde a 850nm kapena 940nm amasankhidwa kuti azikhala pakati pa nsonga za kuyamwa kwa solar spectrum ndi mphamvu ya sensor quantum.

Kutumiza ndi Kulandira Optics

Kumbali yotumizira, mandala osavuta owoneka kapena kuphatikiza magalasi ophatikizana ndi Diffractive Optical Elements (DOEs) amawongolera mtengo wa laser kudutsa gawo lomwe mukufuna. Mawotchi olandila, omwe cholinga chake ndi kusonkhanitsa kuwala mkati mwa gawo lomwe mukufuna kuwona, amapindula ndi magalasi okhala ndi manambala otsika a F ndi zowunikira zapamwamba, pambali pa zosefera zazing'ono kuti athetse kusokonezedwa kwa kuwala.

SPAD ndi SiPM Sensors

Single-photon avalanche diodes (SPAD) ndi Silicon photomultipliers (SiPM) ndi masensa oyambirira mu dTOF systems. Ma SPAD amasiyanitsidwa ndi kuthekera kwawo kuyankha pamafotoni amodzi, zomwe zimayambitsa chiwopsezo champhamvu champhamvu ndi fotoni imodzi yokha, zomwe zimawapanga kukhala abwino poyezera molondola kwambiri. Komabe, kukula kwawo kwa pixel kokulirapo poyerekeza ndi zomverera zachikhalidwe za CMOS zimachepetsa kusanja kwadongosolo kwa machitidwe a dTOF.

Time-to-Digital Converter (TDC)

Dera la TDC limamasulira ma sign a analogi kukhala ma siginecha adijito omwe amaimiridwa ndi nthawi, ndikujambula nthawi yeniyeni yomwe mapiko a photon amajambulidwa. Kulondola uku ndikofunikira kuti mudziwe malo omwe mukufuna kutsata potengera histogram ya ma pulses ojambulidwa.

Kuwona magawo a dTOF Performance

Mtundu Wozindikira ndi Kulondola

Kuzindikira kwa kachitidwe ka dTOF kumafikira mpaka pomwe kuwala kwake kumatha kuyenda ndikuwonetsedwanso ku sensa, yodziwika bwino kwambiri ndi phokoso. Pamagetsi ogula, nthawi zambiri amaganizira kwambiri za 5m, pogwiritsa ntchito VCSELs, pamene magalimoto angafunike kuti azindikire mtunda wa 100m kapena kuposerapo, zomwe zimafunikira matekinoloje osiyanasiyana monga EELs kapenafiber lasers.

dinani apa kuti mudziwe zambiri za mankhwala

Maximum Osadziwika Range

Kuchuluka kwakukulu kopanda kumveka bwino kumadalira nthawi yomwe ili pakati pa ma pulses otulutsidwa ndi ma frequency modulation a laser. Mwachitsanzo, ndi ma frequency modulation a 1MHz, mitundu yosadziwika imatha kufikira 150m.

Zolondola ndi Zolakwika

Kulondola m'machitidwe a dTOF kumakhala kocheperako ndi kuchuluka kwa kugunda kwa laser, pomwe zolakwika zimatha kubwera kuchokera kumitundu yosiyanasiyana yazigawo, kuphatikiza woyendetsa laser, kuyankha kwa sensor ya SPAD, ndi kulondola kwa dera la TDC. Njira monga kugwiritsa ntchito SPAD yofotokozera zingathandize kuchepetsa zolakwikazi pokhazikitsa maziko a nthawi ndi mtunda.

Phokoso ndi Kusokoneza Kukaniza

Makina a dTOF amayenera kulimbana ndi phokoso lakumbuyo, makamaka m'malo owala kwambiri. Njira monga kugwiritsa ntchito ma pixel angapo a SPAD okhala ndi milingo yosiyanasiyana yochepetsera zingathandize kuthana ndi vutoli. Kuphatikiza apo, kuthekera kwa dTOF kusiyanitsa pakati pa zowunikira molunjika ndi zochulukira kumakulitsa kulimba kwake motsutsana ndi kusokonezedwa.

Kusintha kwa Malo ndi Kugwiritsa Ntchito Mphamvu

Kupita patsogolo kwaukadaulo wa masensa a SPAD, monga kusintha kuchokera ku kuwala kwa mbali yakutsogolo (FSI) kupita ku njira zowunikira kumbuyo (BSI), kwasintha kwambiri kuchuluka kwa mayamwidwe a photon ndi magwiridwe antchito. Kupita patsogolo kumeneku, kuphatikizidwa ndi machitidwe a dTOF, kumapangitsa kuti mphamvu zichepetse poyerekeza ndi machitidwe opitilira mafunde monga iTOF.

Tsogolo la dTOF Technology

Ngakhale pali zotchinga zaukadaulo komanso zotsika mtengo zomwe zimalumikizidwa ndiukadaulo wa dTOF, zabwino zake pakulondola, kusiyanasiyana, komanso kugwiritsa ntchito mphamvu kwamphamvu zimapangitsa kuti ikhale yodalirika pakugwiritsa ntchito mtsogolo m'magawo osiyanasiyana. Pamene ukadaulo wa sensa ndi kapangidwe kamagetsi kamagetsi ukupitilirabe kusinthika, makina a dTOF ali okonzeka kutengera anthu ambiri, kuyendetsa zinthu zatsopano pamagetsi ogula, chitetezo chamagalimoto, ndi kupitilira apo.

Kuchokera patsamba02.02 TOF系统第二章 dTOF系统 - 超光 Mofulumira kuposa kuwala (faster-than-light.net)
ndi wolemba: Chao Guang

Chodzikanira:

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