Sau npe rau peb cov social media kom tau txais cov ntawv tshaj tawm sai
Kev siv tshuab Direct Time-of-Flight (dTOF) yog ib txoj hauv kev tshiab los ntsuas lub sijhawm ya ntawm lub teeb kom meej, siv txoj kev Time Correlated Single Photon Counting (TCSPC). Cov thev naus laus zis no yog qhov tseem ceeb rau ntau yam kev siv, los ntawm kev ntsuas qhov ze hauv cov khoom siv hluav taws xob rau cov neeg siv khoom mus rau cov tshuab LiDAR siab heev hauv kev siv tsheb. Hauv nws lub hauv paus, cov tshuab dTOF muaj ntau yam tseem ceeb, txhua tus ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ntsuas qhov deb kom raug.
Cov Cheebtsam Tseem Ceeb ntawm dTOF Systems
Lub tshuab luam ntawv thiab lub tshuab luam ntawv laser
Tus tsav tsheb laser, ib feem tseem ceeb ntawm lub voj voog transmitter, tsim cov teeb liab digital pulse los tswj lub laser lub emission ntawm MOSFET switching. Lasers, tshwj xeeb tshaj yogLasers Uas Muaj Qhov Ntsug Thiab Sab Nraud Uas Muaj Teeb Meem(VCSELs), tau txais kev nyiam rau lawv cov spectrum nqaim, lub zog siab, muaj peev xwm hloov kho sai, thiab yooj yim ntawm kev koom ua ke. Nyob ntawm daim ntawv thov, wavelengths ntawm 850nm lossis 940nm raug xaiv los sib npaug ntawm lub hnub ci spectrum absorption peaks thiab sensor quantum efficiency.
Kev Xa thiab Txais Optics
Ntawm sab xa tawm, lub lens optical yooj yim lossis kev sib xyaw ua ke ntawm cov lens collimating thiab Diffractive Optical Elements (DOEs) coj lub teeb laser hla lub tshav pom kev xav tau. Cov optics txais, lub hom phiaj ntawm kev sib sau ua ke lub teeb hauv lub tshav pom kev, tau txais txiaj ntsig los ntawm cov lens nrog cov lej F qis dua thiab lub teeb pom kev zoo dua, nrog rau cov lim dej nqaim kom tshem tawm cov teeb pom kev tsis zoo.
Cov Sensors SPAD thiab SiPM
Cov diodes ib leeg-photon avalanche (SPAD) thiab Silicon photomultipliers (SiPM) yog cov sensors tseem ceeb hauv dTOF systems. SPADs tau sib txawv los ntawm lawv lub peev xwm los teb rau ib qho photons, ua rau muaj zog avalanche tam sim no nrog tsuas yog ib lub photon, ua rau lawv zoo tagnrho rau kev ntsuas qhov tseeb. Txawm li cas los xij, lawv qhov loj me pixel loj dua piv rau cov CMOS sensors ib txwm txwv qhov kev daws teeb meem ntawm dTOF systems.
Lub Sijhawm-rau-Digital Converter (TDC)
Lub voj voog TDC txhais cov teeb liab analog mus rau hauv cov teeb liab digital uas sawv cev los ntawm lub sijhawm, ntes lub sijhawm tseeb txhua lub photon pulse raug kaw. Qhov kev raug no yog qhov tseem ceeb rau kev txiav txim siab qhov chaw ntawm lub hom phiaj raws li cov histogram ntawm cov pulses kaw tseg.
Tshawb Nrhiav Cov Kev Ntsuas Kev Ua Haujlwm ntawm dTOF
Kev Tshawb Pom Ntau Yam thiab Qhov Tseeb
Qhov ntau ntawm kev kuaj pom ntawm lub kaw lus dTOF theoretically nthuav dav mus txog thaum nws lub teeb pulses tuaj yeem mus ncig thiab rov qab los rau lub sensor, txheeb xyuas qhov sib txawv ntawm suab nrov. Rau cov khoom siv hluav taws xob, qhov kev tsom mus rau feem ntau yog nyob rau hauv 5m ntau yam, siv VCSELs, thaum cov ntawv thov tsheb yuav xav tau kev kuaj pom ntau yam ntawm 100m lossis ntau dua, xav tau cov thev naus laus zis sib txawv xws li EELs lossiscov laser fiber ntau.
nyem qhov no kom paub ntxiv txog cov khoom
Qhov Siab Tshaj Plaws Tsis Muaj Kev Txawv Txawv
Qhov ntau yam tsis muaj kev tsis meej pem nyob ntawm lub sijhawm ntawm cov pulses emitted thiab lub zaus modulation ntawm lub laser. Piv txwv li, nrog lub zaus modulation ntawm 1MHz, qhov ntau yam tsis meej pem tuaj yeem ncav cuag txog li 150m.
Kev Ntsuas thiab Kev Yuam Kev
Qhov tseeb hauv dTOF systems yog txwv los ntawm qhov dav ntawm lub laser, thaum qhov yuam kev tuaj yeem tshwm sim los ntawm ntau yam tsis paub meej hauv cov khoom, suav nrog tus tsav tsheb laser, SPAD sensor teb, thiab TDC circuit qhov tseeb. Cov tswv yim zoo li siv SPAD siv tau tuaj yeem pab txo cov yuam kev no los ntawm kev tsim kom muaj lub hauv paus rau lub sijhawm thiab qhov deb.
Kev Tiv Thaiv Suab Nrov thiab Kev Cuam Tshuam
Cov kab ke dTOF yuav tsum sib ntaus nrog lub suab nrov tom qab, tshwj xeeb tshaj yog nyob rau hauv qhov chaw muaj teeb pom kev zoo. Cov txheej txheem xws li siv ntau lub SPAD pixels nrog ntau qib attenuation tuaj yeem pab tswj qhov kev sib tw no. Tsis tas li ntawd, dTOF lub peev xwm los paub qhov txawv ntawm kev cuam tshuam ncaj qha thiab ntau txoj kev ua rau nws muaj zog tiv thaiv kev cuam tshuam.
Kev daws teeb meem ntawm qhov chaw thiab kev siv hluav taws xob
Kev nce qib hauv SPAD sensor technology, xws li kev hloov pauv ntawm kev teeb pom kev zoo sab pem hauv ntej (FSI) mus rau kev teeb pom kev zoo sab nraub qaum (BSI), tau txhim kho cov nqi nqus photon thiab kev ua haujlwm ntawm sensor. Qhov kev nce qib no, ua ke nrog qhov xwm txheej ntawm dTOF systems, ua rau kev siv hluav taws xob tsawg dua piv rau cov kab ke nthwv dej tas mus li xws li iTOF.
Yav Tom Ntej ntawm dTOF Technology
Txawm hais tias muaj kev cov nyom siab thiab cov nqi cuam tshuam nrog dTOF thev naus laus zis, nws qhov zoo hauv qhov tseeb, ntau yam, thiab kev siv hluav taws xob ua rau nws yog tus neeg sib tw zoo rau kev siv yav tom ntej hauv ntau qhov chaw. Raws li thev naus laus zis sensor thiab kev tsim hluav taws xob hluav taws xob txuas ntxiv mus, dTOF systems tau npaj rau kev siv dav dua, tsav tsheb kev tsim kho tshiab hauv cov khoom siv hluav taws xob, kev nyab xeeb hauv tsheb, thiab dhau mus.
- Los ntawm nplooj ntawv web02.02 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
Cov Lus Tsis Lees Paub:
- Peb tshaj tawm tias qee cov duab uas tso tawm hauv peb lub vev xaib yog sau los ntawm Is Taws Nem thiab Wikipedia, nrog lub hom phiaj los txhawb kev kawm thiab kev sib qhia cov ntaub ntawv. Peb hwm cov cai ntawm txhua tus neeg tsim khoom. Kev siv cov duab no tsis yog rau kev lag luam.
- Yog tias koj ntseeg tias cov ntsiab lus siv ua txhaum koj txoj cai lij choj, thov hu rau peb. Peb txaus siab ua cov kauj ruam tsim nyog, suav nrog kev tshem tawm cov duab lossis muab cov ntaub ntawv pov thawj kom raug, kom ntseeg tau tias ua raws li cov cai lij choj thiab cov cai ntawm kev txawj ntse. Peb lub hom phiaj yog kom tswj hwm lub platform uas muaj cov ntsiab lus nplua nuj, ncaj ncees, thiab hwm cov cai ntawm kev txawj ntse ntawm lwm tus.
- Thov hu rau peb ntawm qhov chaw nyob email hauv qab no:sales@lumispot.cnPeb cog lus tias yuav ua haujlwm tam sim ntawd thaum tau txais kev ceeb toom thiab lav 100% kev koom tes hauv kev daws cov teeb meem zoo li no.
Lub sijhawm tshaj tawm: Lub Peb Hlis-07-2024