Xov Xwm - Lub Ntsiab Cai Tseem Ceeb thiab Daim Ntawv Thov ntawm TOF (Lub Sijhawm Dav Hlau) System

Sau npe rau peb cov social media kom tau txais cov ntawv tshaj tawm sai

Cov ntawv no lub hom phiaj yog muab kev nkag siab tob thiab nce qib rau cov nyeem ntawv txog lub sijhawm ya dav hlau (TOF) system. Cov ntsiab lus no suav nrog kev piav qhia txog TOF systems, suav nrog cov lus piav qhia ntxaws txog ob qho tib si indirect TOF (iTOF) thiab direct TOF (dTOF). Cov ntu no kawm txog cov txheej txheem system, lawv cov txiaj ntsig thiab qhov tsis zoo, thiab ntau yam algorithms. Tsab xov xwm kuj tshawb nrhiav cov khoom sib txawv ntawm TOF systems, xws li Vertical Cavity Surface Emitting Lasers (VCSELs), transmission thiab reception lenses, receiving sensors xws li CIS, APD, SPAD, SiPM, thiab driver circuits xws li ASICs.

Kev Taw Qhia rau TOF (Lub Sijhawm Dav Hlau)

Cov Ntsiab Cai Tseem Ceeb

TOF, sawv cev rau Lub Sijhawm Dav Hlau, yog ib txoj kev siv los ntsuas qhov deb los ntawm kev xam lub sijhawm uas lub teeb siv los mus ncig ib qho deb hauv ib qho chaw nruab nrab. Lub hauv paus ntsiab lus no feem ntau yog siv rau hauv cov xwm txheej TOF optical thiab yooj yim heev. Cov txheej txheem no cuam tshuam nrog lub teeb ci ntsa iab, nrog rau lub sijhawm ntawm kev tso tawm. Lub teeb no ces cuam tshuam tawm ntawm lub hom phiaj, raug ntes los ntawm lub receiver, thiab lub sijhawm ntawm kev txais tau sau tseg. Qhov sib txawv ntawm cov sijhawm no, qhia ua t, txiav txim siab qhov deb (d = qhov ceev ntawm lub teeb (c) × t / 2).

Hom ToF Sensors

Muaj ob hom ToF sensors tseem ceeb: optical thiab electromagnetic. Optical ToF sensors, uas yog siv ntau dua, siv lub teeb pulses, feem ntau nyob rau hauv infrared ntau yam, rau kev ntsuas qhov deb. Cov pulses no raug tso tawm los ntawm lub sensor, cuam tshuam tawm ntawm ib yam khoom, thiab rov qab mus rau lub sensor, qhov twg lub sijhawm mus ncig ntsuas thiab siv los xam qhov deb. Qhov sib piv, electromagnetic ToF sensors siv electromagnetic waves, zoo li radar lossis lidar, los ntsuas qhov deb. Lawv ua haujlwm ntawm ib lub hauv paus ntsiab lus zoo sib xws tab sis siv lwm yam nruab nrab raukev ntsuas qhov deb.

Cov ntawv thov ntawm ToF Sensors

ToF sensors muaj ntau yam siv tau thiab tau koom ua ke rau ntau qhov chaw:

Kev Siv Neeg Hlau:Siv rau kev nrhiav thiab kev taw qhia cov teeb meem. Piv txwv li, cov neeg hlau zoo li Roomba thiab Boston Dynamics' Atlas siv ToF lub koob yees duab tob rau kev kos duab lawv ib puag ncig thiab npaj kev txav mus los.

Cov Txheej Txheem Kev Ruaj Ntseg:Feem ntau siv rau hauv cov khoom siv ntsuas kev txav mus los rau kev ntes cov neeg nkag tebchaws, ua rau lub tswb ceeb toom, lossis qhib lub koob yees duab.

Kev Lag Luam Tsheb:Muab tso rau hauv cov tshuab pab tus tsav tsheb rau kev tswj hwm kev tsav tsheb sai thiab kev tiv thaiv kev sib tsoo, uas tau tshwm sim ntau ntxiv hauv cov qauv tsheb tshiab.

Kev Kho MobSiv rau hauv kev thaij duab thiab kuaj mob uas tsis yog kev phais, xws li optical coherence tomography (OCT), tsim cov duab nqaij uas muaj kev daws teeb meem siab.

Cov Khoom Siv Hluav Taws Xob Rau Cov Neeg Siv Khoom: Sib xyaw ua ke rau hauv cov xov tooj ntse, ntsiav tshuaj, thiab laptops rau cov yam ntxwv xws li kev paub txog lub ntsej muag, kev lees paub biometric, thiab kev paub txog kev taw qhia.

Cov drones:Siv rau kev tsav nkoj, kev tiv thaiv kev sib tsoo, thiab hauv kev daws teeb meem kev ceev ntiag tug thiab kev tsav dav hlau

TOF System Architecture

Ib qho TOF system ib txwm muaj ntau yam tseem ceeb los ua kom tiav qhov kev ntsuas qhov deb raws li tau piav qhia:

· Lub Tshuab Xa Xov Tooj (Tx):Qhov no suav nrog lub teeb laser, feem ntau yogVCSEL, lub voj voog tsav tsheb ASIC los tsav lub laser, thiab cov khoom siv kho qhov muag rau kev tswj lub teeb xws li cov iav sib txuas lossis cov khoom siv kho qhov muag diffractive, thiab cov lim dej.
· Tus Txais (Rx):Qhov no muaj cov iav thiab cov lim dej ntawm qhov kawg tau txais, cov sensors zoo li CIS, SPAD, lossis SiPM nyob ntawm TOF system, thiab Image Signal Processor (ISP) rau kev ua cov ntaub ntawv ntau los ntawm cov chip receiver.
·Kev Tswj Fais Fab:Kev tswj hwm ruaj khovkev tswj tam sim no rau VCSELs thiab qhov hluav taws xob siab rau SPADs yog qhov tseem ceeb, xav tau kev tswj hwm lub zog muaj zog.
· Txheej software:Qhov no suav nrog firmware, SDK, OS, thiab txheej txheej thov.

Cov qauv tsim qhia txog yuav ua li cas lub teeb laser, uas pib los ntawm VCSEL thiab hloov kho los ntawm cov khoom siv kho qhov muag, mus ncig los ntawm qhov chaw, cuam tshuam tawm ntawm ib yam khoom, thiab rov qab mus rau tus neeg txais. Kev suav lub sijhawm dhau mus hauv cov txheej txheem no qhia txog qhov deb lossis qhov tob. Txawm li cas los xij, cov qauv tsim no tsis suav nrog cov kev suab nrov, xws li lub hnub ci ua rau suab nrov lossis ntau txoj kev suab nrov los ntawm kev cuam tshuam, uas tau tham tom qab hauv cov koob.

Kev faib tawm ntawm TOF Systems

Cov txheej txheem TOF feem ntau raug faib ua pawg raws li lawv cov txheej txheem ntsuas qhov deb: TOF ncaj qha (dTOF) thiab TOF tsis ncaj qha (iTOF), txhua tus muaj cov khoom siv kho vajtse thiab cov txheej txheem algorithmic sib txawv. Cov koob no pib piav qhia lawv cov ntsiab cai ua ntej nkag mus rau hauv kev tshuaj xyuas sib piv ntawm lawv cov txiaj ntsig, cov teeb meem, thiab cov txheej txheem system.

Txawm hais tias lub hauv paus ntsiab lus yooj yim ntawm TOF - tso tawm lub teeb pulse thiab ntes nws rov qab los xam qhov deb - qhov nyuaj yog nyob rau hauv kev sib txawv ntawm lub teeb rov qab los ntawm lub teeb ambient. Qhov no yog daws los ntawm kev tso tawm lub teeb ci txaus kom ua tiav qhov sib piv ntawm lub teeb liab rau lub suab nrov thiab xaiv cov wavelengths tsim nyog los txo qhov cuam tshuam ntawm lub teeb ib puag ncig. Lwm txoj hauv kev yog encode lub teeb tawm kom ua rau nws sib txawv thaum rov qab los, zoo ib yam li SOS cov cim nrog lub teeb ci.

Cov koob no txuas ntxiv mus piv rau dTOF thiab iTOF, tham txog lawv qhov sib txawv, qhov zoo, thiab cov teeb meem kom ntxaws, thiab faib cov kab ke TOF ntxiv raws li qhov nyuaj ntawm cov ntaub ntawv uas lawv muab, xws li 1D TOF mus rau 3D TOF.

dTOF

TOF ncaj qha ntsuas lub sijhawm ya ntawm photon ncaj qha. Nws cov khoom tseem ceeb, Single Photon Avalanche Diode (SPAD), muaj kev rhiab heev txaus los ntes cov photons ib leeg. dTOF siv Time Correlated Single Photon Counting (TCSPC) los ntsuas lub sijhawm ntawm photon tuaj txog, tsim ib daim histogram los txiav txim siab qhov deb tshaj plaws raws li qhov zaus siab tshaj plaws ntawm qhov sib txawv ntawm lub sijhawm tshwj xeeb.

iTOF

TOF tsis ncaj qha xam lub sijhawm ya raws li qhov sib txawv ntawm cov waveforms uas tawm thiab tau txais, feem ntau siv cov teeb liab txuas ntxiv lossis cov teeb liab pulse modulation. iTOF tuaj yeem siv cov qauv duab sensor txheem, ntsuas qhov muaj zog ntawm lub teeb raws sijhawm.

iTOF tseem muab faib ua ob hom: continuous wave modulation (CW-iTOF) thiab pulse modulation (Pulsed-iTOF). CW-iTOF ntsuas qhov hloov pauv ntawm cov nthwv dej sinusoidal uas tawm thiab tau txais, thaum Pulsed-iTOF xam qhov hloov pauv ntawm kev siv cov cim square wave.

Nyeem Ntxiv:

Wikipedia. (nd). Lub sijhawm ya. Tau txais los ntawmhttps://en.wikipedia.org/wiki/Time_of_flight
Sony Semiconductor Solutions Group. (nd). ToF (Lub Sijhawm Dav Hlau) | Cov Txuj Ci Siv Tau Zoo ntawm Cov Duab Sensors. Tau txais los ntawmhttps://www.sony-semicon.com/en/technologies/tof
Microsoft. (2021, Lub Ob Hlis 4). Kev Taw Qhia rau Microsoft Lub Sijhawm Dav Hlau (ToF) - Azure Depth Platform. Tau txais 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: Kev Txheeb Xyuas tob thiab Daim Ntawv Thov. Tau txais los ntawmhttps://www.escatec.com/news/time-of-flight-tof-sensors-an-in-depth-overview-and-applications

Los ntawm nplooj ntawv webhttps://faster-than-light.net/TOFSystem_C1/

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.