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Cov koob no yog tsim los muab cov neeg nyeem nrog qhov tob thiab nkag siab zoo ntawm Lub Sijhawm Dav Hlau (TOF) system. Cov ntsiab lus suav nrog cov ntsiab lus dav dav ntawm TOF systems, suav nrog cov lus piav qhia ntxaws ntawm ob qho tib si ncaj qha TOF (iTOF) thiab ncaj qha TOF (dTOF). Cov ntu no delve rau hauv qhov system tsis, lawv qhov zoo thiab qhov tsis zoo, thiab ntau yam algorithms. Tsab ntawv xov xwm tseem tshawb txog cov khoom sib txawv ntawm TOF systems, xws li Vertical Cavity Surface Emitting Lasers (VCSELs), kis tau tus mob thiab txais lo ntsiab muag, tau txais cov sensors xws li CIS, APD, SPAD, SiPM, thiab tsav tsheb zoo li ASICs.
Taw qhia rau TOF (Lub Sijhawm Dav Hlau)
Cov Ntsiab Cai
TOF, sawv rau Lub Sijhawm Dav Hlau, yog ib txoj hauv kev siv los ntsuas qhov deb los ntawm kev suav lub sijhawm nws siv rau lub teeb mus rau qhov deb ntawm qhov nruab nrab. Lub hauv paus ntsiab lus no feem ntau yog siv rau hauv cov xwm txheej kho qhov muag TOF thiab yog qhov ncaj ncaj. Cov txheej txheem cuam tshuam nrog lub teeb ci emitting ib lub teeb ntawm lub teeb, nrog rau lub sij hawm ntawm emission kaw. Lub teeb no ces qhia tawm ntawm lub hom phiaj, raug ntes los ntawm tus txais, thiab lub sijhawm txais tos tau sau tseg. Qhov sib txawv ntawm cov sij hawm no, denoted li t, txiav txim qhov deb (d = ceev ntawm lub teeb (c) × t / 2).
Hom ToF Sensors
Muaj ob hom ToF sensors: optical thiab electromagnetic. Optical ToF sensors, uas muaj ntau dua, siv lub teeb pulses, feem ntau nyob rau hauv infrared ntau, rau kev ntsuas deb. Cov pulses no tawm los ntawm lub sensor, xav txog ntawm ib qho khoom, thiab rov qab mus rau lub sensor, qhov twg lub sij hawm mus txawv tebchaws yog ntsuas thiab siv los xam qhov deb. Nyob rau hauv sib piv, electromagnetic ToF sensors siv electromagnetic tsis, xws li radar los yog lidar, los ntsuas qhov deb. Lawv ua haujlwm raws li txoj cai zoo sib xws tab sis siv qhov nruab nrab sib txawv rauntsuas qhov deb.
Kev siv ntawm ToF Sensors
ToF sensors muaj ntau yam thiab tau muab tso rau hauv ntau yam:
Robotics:Nws yog siv rau kev tshawb nrhiav qhov teeb meem thiab navigation. Piv txwv li, cov neeg hlau zoo li Roomba thiab Boston Dynamics 'Atlas ntiav ToF lub koob yees duab qhov tob rau kev kos lawv ib puag ncig thiab kev npaj txav.
Kev ruaj ntseg Systems:Feem ntau nyob rau hauv cov lus tsa suab sensors rau ntes intruders, triggering tswb, los yog activating lub koob yees duab systems.
Automotive Kev Lag Luam:Incorporated nyob rau hauv tus neeg tsav tsheb-pab systems rau adaptive cruise tswj thiab kev sib tsoo kom tsis txhob muaj kev sib tsoo, ua ntau zuj zus nyob rau hauv cov qauv tsheb tshiab.
Kev Kho Mob Field: Ua hauj lwm hauv cov duab uas tsis muaj kev cuam tshuam thiab kev kuaj mob, xws li kho qhov muag coherence tomography (OCT), tsim cov duab cov ntaub so ntswg.
Consumer Electronics: Muab tso rau hauv smartphones, ntsiav tshuaj, thiab laptops rau cov yam ntxwv xws li lub ntsej muag paub, biometric authentication, thiab piav tes piav taw.
Drones:Siv rau kev navigation, tiv thaiv kev sib tsoo, thiab hais txog kev ceev ntiag tug thiab kev txhawj xeeb aviation
TOF System Architecture
Ib tug raug TOF system muaj ob peb yam tseem ceeb kom ua tiav qhov kev ntsuas qhov deb raws li tau piav qhia:
· Transmitter (Tx):Qhov no suav nrog lub teeb ci laser, feem ntau aVCSEL, tus tsav tsheb Circuit Court ASIC los tsav lub laser, thiab cov khoom siv kho qhov muag rau kev tswj cov nqaj xws li collimating lo ntsiab muag lossis cov khoom siv kho qhov muag diffractive, thiab cov ntxaij lim dej.
· Txais (Rx):Qhov no muaj cov lo ntsiab muag thiab cov ntxaij lim dej ntawm qhov kawg tau txais, sensors zoo li CIS, SPAD, lossis SiPM nyob ntawm TOF system, thiab cov duab teeb pom kev zoo (ISP) rau kev ua cov ntaub ntawv ntau los ntawm cov txais nti.
·Tswj fais fab:Tswj ruaj khovKev tswj tam sim no rau VCSELs thiab qhov hluav taws xob siab rau SPADs yog qhov tseem ceeb, yuav tsum muaj kev tswj hwm lub zog.
· Software Txheej:Qhov no suav nrog firmware, SDK, OS, thiab daim ntawv thov txheej.
Lub architecture qhia tau hais tias yuav ua li cas lub laser beam, los ntawm VCSEL thiab hloov kho los ntawm cov khoom siv kho qhov muag, taug kev los ntawm qhov chaw, cuam tshuam cov khoom, thiab rov qab mus rau lub receiver. Lub sij hawm lapse xam nyob rau hauv cov txheej txheem no qhia qhov deb los yog qhov tob. Txawm li cas los xij, qhov kev tsim vaj tsev no tsis npog cov suab nrov, xws li lub hnub ci vim lub suab nrov lossis ntau txoj kev nrov nrov los ntawm kev xav, uas tau tham tom qab hauv koob.
Kev faib tawm ntawm TOF Systems
TOF systems yog feem ntau categorized los ntawm lawv cov kev ntsuas nyob deb: ncaj qha TOF (dTOF) thiab indirect TOF (iTOF), txhua tus nrog txawv hardware thiab algorithmic mus kom ze. Cov koob pib qhia lawv cov hauv paus ntsiab lus ua ntej delving rau hauv kev sib piv kev tsom xam ntawm lawv qhov zoo, kev sib tw, thiab qhov system tsis.
Txawm hais tias zoo li yooj yim txoj cai ntawm TOF - emitting lub teeb mem tes thiab kuaj pom nws rov qab los xam qhov deb - qhov nyuaj nyob rau hauv qhov sib txawv ntawm lub teeb rov qab los ntawm lub teeb ambient. Qhov no yog hais los ntawm emitting lub teeb ci txaus kom ua tiav lub teeb liab-rau-suab nrov piv thiab xaiv qhov tsim nyog wavelengths kom txo qis ib puag ncig lub teeb cuam tshuam. Lwm txoj hauv kev yog encode lub teeb tawm los ua kom nws paub qhov txawv thaum rov qab los, zoo ib yam li SOS teeb liab nrog lub teeb nyem.
Cov koob no txuas ntxiv los sib piv dTOF thiab iTOF, sib tham txog lawv qhov sib txawv, qhov zoo, thiab cov kev sib tw kom ntxaws, thiab ntxiv categorizes TOF systems raws li qhov nyuaj ntawm cov ntaub ntawv lawv muab, xws li 1D TOF rau 3D TOF.
dTOF
Direct TOF ncaj qha ntsuas lub photon lub sijhawm ya davhlau. Nws cov ntsiab lus tseem ceeb, Ib leeg Photon Avalanche Diode (SPAD), yog qhov nkag siab txaus los kuaj pom ib qho photons. dTOF ntiav Time Correlated Single Photon Counting (TCSPC) los ntsuas lub sij hawm ntawm photon tuaj txog, tsim ib lub histogram los txiav tawm qhov kev ncua deb raws li qhov siab tshaj plaws ntawm ib lub sijhawm sib txawv.
iTOF
Indirect TOF xam lub sij hawm davhlau raws li theem sib txawv ntawm emissions thiab tau txais waveforms, feem ntau siv nruam nthwv dej los yog mem tes modulation signals. iTOF tuaj yeem siv cov qauv duab sensor architectures, ntsuas lub teeb siv lub sijhawm.
iTOF yog ntxiv subdivided rau hauv nruam wave modulation (CW-iTOF) thiab pulse modulation (Pulsed-iTOF). CW-iTOF ntsuas cov theem hloov ntawm emissions thiab tau txais sinusoidal nthwv dej, thaum Pulsed-iTOF xam cov theem hloov siv cov square wave signals.
Nyeem ntxiv:
- Wikipedia. (nd). Lub sijhawm ya davhlau. Rov qab los ntawmhttps://en.wikipedia.org/wiki/Time_of_flight
- Sony Semiconductor Solutions Group. (nd). ToF (Lub Sijhawm Dav Hlau) | Common Technology ntawm Duab Sensors. Rov qab los ntawmhttps://www.sony-semicon.com/en/technologies/tof
- Microsoft. (2021, Lub Ob Hlis 4). Intro rau Microsoft Lub Sijhawm Dav Hlau (ToF) - Azure Depth Platform. Rov qab los ntawmhttps://devblogs.microsoft.com/azure-depth-platform/intro-to-microsoft-time-of-flight-tof
- ESCATEC. (2023, Lub Peb Hlis 2). Lub Sijhawm Dav Hlau (TOF) Sensors: Ib Qhov Kev Ntsuas Hauv Qhov tob thiab kev siv. Rov qab los ntawmhttps://www.escatec.com/news/time-of-flight-tof-sensors-an-in-depth-overview-and-applications
Los ntawm lub vev xaibhttps://faster-than-light.net/TOFSystem_C1/
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: Dec-18-2023