Sau npe yuav mus rau peb lub social media rau Prompt Post
Direct Time-of-Flight (dTOF) thev naus laus zis yog ib txoj hauv kev tshiab los ntsuas lub sijhawm ya davhlau ntawm lub teeb, siv lub Sijhawm Correlated Single Photon Counting (TCSPC). Cov thev naus laus zis no yog ib qho tseem ceeb rau ntau yam kev siv, los ntawm kev sib thooj ntawm cov neeg siv khoom siv hluav taws xob mus rau cov tshuab LiDAR siab heev hauv kev siv tsheb. Ntawm nws lub hauv paus, dTOF systems muaj ntau yam tseem ceeb, txhua tus ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ntsuas qhov deb.
Cov Ntsiab Cai ntawm dTOF Systems
Laser Tsav thiab Laser
Lub laser tsav tsheb, ib feem tseem ceeb ntawm lub transmitter Circuit Court, generates digital pulse signals los tswj lub laser emission ntawm MOSFET switching. Lasers, tshwj xeeb tshaj yogVertical Cavity Surface Emitting Lasers(VCSELs), tau txais kev pom zoo rau lawv cov spectrum nqaim, muaj zog siv zog, muaj peev xwm hloov tau sai, thiab yooj yim ntawm kev sib koom ua ke. Nyob ntawm daim ntawv thov, wavelengths ntawm 850nm los yog 940nm raug xaiv kom sib npaug ntawm hnub ci spectrum absorption peaks thiab sensor quantum efficiency.
Kev xa thiab txais Optics
Nyob rau sab kis, ib qho yooj yim kho qhov muag lo ntsiab muag los yog ib qho kev sib txuas ntawm collimating lo ntsiab muag thiab Diffractive Optical Elements (DOEs) directs lub laser beam hla qhov xav tau kev pom. Qhov tau txais optics, tsom rau kev sib sau ua ke lub teeb nyob rau hauv lub hom phiaj ntawm qhov pom, tau txais txiaj ntsig los ntawm cov lo ntsiab muag nrog qis F-tus lej thiab cov teeb pom kev zoo dua qub, nrog rau cov lim nqaim kom tshem tawm cov teeb pom kev tsis zoo.
SPAD thiab SiPM Sensors
Ib leeg-photon avalanche diodes (SPAD) thiab Silicon photomultipliers (SiPM) yog thawj sensors hauv dTOF systems. SPADs yog qhov txawv ntawm lawv lub peev xwm los teb rau ib qho photons, ua rau muaj zog avalanche tam sim no nrog ib qho photon, ua rau lawv zoo tagnrho rau kev ntsuas siab. Txawm li cas los xij, lawv cov pixel loj dua piv rau cov tsoos CMOS sensors txwv qhov kev daws teeb meem ntawm dTOF systems.
Lub sij hawm-rau-Digital Converter (TDC)
Lub TDC circuit translates analog signals rau hauv digital signals sawv cev los ntawm lub sij hawm, ntes lub sij hawm meej txhua photon mem tes kaw. Qhov tseeb no yog qhov tseem ceeb rau kev txiav txim siab txoj haujlwm ntawm lub hom phiaj khoom raws li histogram ntawm cov pulses kaw.
Tshawb nrhiav dTOF Performance Parameters
Kev kuaj pom ntau thiab qhov tseeb
Kev tshawb nrhiav ntau yam ntawm dTOF system theoretically txuas ntxiv kom deb li deb ntawm nws lub teeb pulses tuaj yeem taug kev thiab rov qab mus rau lub sensor, txheeb xyuas qhov txawv ntawm lub suab nrov. Rau cov neeg siv khoom siv hluav taws xob, lub hom phiaj yog feem ntau nyob rau hauv 5m ntau yam, siv VCSELs, thaum daim ntawv thov tsheb yuav xav tau kev tshawb nrhiav qhov deb ntawm 100m lossis ntau dua, xav tau cov thev naus laus zis sib txawv xws li EELs lossisfiber ntau lasers.
nyem qhov no kom paub ntau ntxiv txog cov khoom
Qhov siab tshaj qhov tsis paub meej
Qhov siab tshaj plaws uas tsis muaj qhov tsis meej yog nyob ntawm lub sijhawm nruab nrab ntawm cov pulses emitted thiab modulation zaus ntawm lub laser. Piv txwv li, nrog kev hloov pauv zaus ntawm 1MHz, qhov tsis meej pem tuaj yeem ncav cuag 150m.
Precision thiab yuam kev
Precision nyob rau hauv dTOF systems yog inherently txwv los ntawm lub mem tes dav ntawm lub laser, thaum yuam kev yuav tshwm sim los ntawm ntau yam uncertainties nyob rau hauv lub Cheebtsam, nrog rau lub laser tsav tsheb, SPAD sensor teb, thiab TDC Circuit Court raug. Cov tswv yim zoo li kev siv SPAD siv tau tuaj yeem pab txo cov kev ua yuam kev no los ntawm kev tsim lub hauv paus rau lub sijhawm thiab nyob deb.
Suab nrov thiab cuam tshuam tsis kam
dTOF systems yuav tsum sib cav nrog cov suab nrov tom qab, tshwj xeeb tshaj yog nyob rau hauv lub teeb muaj zog. Cov txuj ci xws li siv ntau yam SPAD pixels nrog ntau theem attenuation tuaj yeem pab tswj qhov kev sib tw no. Tsis tas li ntawd, dTOF lub peev xwm los paub qhov txawv ntawm qhov ncaj qha thiab ntau qhov kev xav tau ua rau nws muaj zog tiv thaiv kev cuam tshuam.
Spatial Resolution thiab kev siv hluav taws xob
Kev nce qib hauv SPAD sensor thev naus laus zis, xws li kev hloov pauv ntawm pem hauv ntej-sab teeb pom kev zoo (FSI) mus rau cov txheej txheem rov qab sab illumination (BSI), tau txhim kho cov txiaj ntsig zoo ntawm photon nqus thiab sensor efficiency. Qhov kev nce qib no, ua ke nrog cov xwm txheej ntawm dTOF systems, ua rau qis zog siv piv rau cov nthwv dej txuas ntxiv xws li iTOF.
Lub neej yav tom ntej ntawm dTOF Technology
Txawm hais tias muaj teeb meem kev lag luam siab thiab cov nqi cuam tshuam nrog dTOF thev naus laus zis, nws qhov zoo ntawm qhov raug, ntau yam, thiab kev siv hluav taws xob ua kom nws muaj kev cia siab rau cov ntawv thov yav tom ntej hauv ntau qhov chaw. Raws li kev siv thev naus laus zis thiab hluav taws xob tsim hluav taws xob txuas ntxiv mus, dTOF cov tshuab tau npaj rau kev siv dav dua, tsav tsheb tshiab hauv cov neeg siv khoom siv hluav taws xob, kev nyab xeeb tsheb, thiab lwm yam.
- Los ntawm lub vev xaib02.02 TOF系统 第二章 dTOF系统 - 超光 Ceev tshaj lub teeb (fast-than-light.net)
- los ntawm tus sau: Chao Guang
Tsis lees paub:
- Peb tshaj tawm hais tias qee cov duab uas tshwm sim hauv peb lub vev xaib raug sau los ntawm Is Taws Nem thiab Wikipedia, nrog rau kev txhawb nqa kev kawm thiab kev sib qhia cov ntaub ntawv. Peb hwm txoj cai kev txawj ntse ntawm txhua tus tsim. Kev siv cov duab no tsis yog rau kev lag luam nce.
- Yog tias koj ntseeg tias ib qho ntawm cov ntsiab lus siv ua txhaum koj txoj cai, thov hu rau peb. Peb txaus siab los ua cov kev ntsuas tsim nyog, suav nrog kev tshem tawm cov duab lossis muab cov khoom tsim nyog, txhawm rau ua raws li cov cai lij choj thiab cov cai. Peb lub hom phiaj yog los tuav lub platform uas muaj cov ntsiab lus nplua nuj, ncaj ncees, thiab hwm txoj cai kev txawj ntse ntawm lwm tus.
- Thov hu rau peb ntawm email chaw nyob hauv qab no:sales@lumispot.cn. Peb cog lus tias yuav ua tam sim ntawd thaum tau txais ib qho kev ceeb toom thiab lav 100% kev koom tes hauv kev daws txhua yam teeb meem.
Post lub sij hawm: Mar-07-2024