Kev ruaj ntseg Laser Sensor Radar Ranging Solution

LiDARLaser Sensor nquag emits laser lub teeb thiab tuaj yeem tau txais cov ntaub ntawv xws li kev ncua deb, kev taw qhia, ceev thiab contour ntawm lub hom phiaj intruding nrog siab precision thiab siab daws teeb meem. Nws tau siv dav hauv kev lag luam xws li kev ruaj ntseg hauv nroog thiab kev lag luam kev ruaj ntseg. Tsab ntawv xov xwm no luv luv qhia txog lub ntsiab lus tseem ceeb hauv tsev thiab txawv teb chaws kev ruaj ntseg lidar manufacturers thiab lawv cov khoom specifications. Kev sib xyaw cov kev xav tau ntawm cov ntawv thov kev ruaj ntseg sib txawv, cov hauv paus ntsiab lus, cov yam ntxwv thiab qhov xwm txheej tam sim no ntawm lidar nyob rau hauv cov txheej txheem sib txawv tau sib tham los ntawm peb yam: xws li cov tswv yim, cov txheej txheem scanning thiab xaiv lub teeb ci. Thaum kawg, daim ntawv thov tiam sis thiab kev loj hlob zeem muag ntawm kev ruaj ntseg lidar tau sau tseg thiab kev cia siab. Yuav kom ua tau raws li cov kev xav tau ntawm cov neeg siv kev ruaj ntseg daim ntaub ntawv, kev ruaj ntseg lidar yuav ntxiv txhim kho nyob rau hauv cov lus qhia ntawm tus nqi qis, kev ua haujlwm siab, serialization, miniaturization, solid state, chipization thiab multi-source integration.

Txhawm rau txhawm rau txheeb xyuas cov ntaub ntawv lub hom phiaj, kev ruaj ntseg lidar tuaj yeem ntsuas tsis tau ncaj qha rau lub sijhawm ya davhlau ntawm laser pulses, tab sis kuj hloov kho lub amplitude, zaus thiab theem ntawm lub teeb liab tawm laser, yog li indirectly ntes lub hom phiaj deb. Raws li txoj kev tshawb pom, kev ruaj ntseg lidar ntau qhov kev daws teeb meem tuaj yeem muab faib ua lub sijhawm ntawm lub sijhawm ya davhlau (TOF), amplitude modulated nruam nthwv dej (AMCW) thiab zaus modulated nruam nthwv dej (Frequency Modulated Continuous Wave, FMCW) Peb hom.

Pulse TOF detection siv cov teeb liab mem tes raws li cov cim qhia pom, thiab tau txais cov ntaub ntawv nyob deb ntawm lub hom phiaj los ntawm kev ntsuas lub sij hawm ya davhlau ntawm lub teeb pom kev zoo. Lub hauv paus ntsiab lus muaj nyob rau hauv daim duab 1. Cov tshuaj TOF tuaj yeem siv rau kev ruaj ntseg ntawm qhov sib txawv, xws li kev ruaj ntseg hauv ib puag ncig thiab kev ruaj ntseg hauv kev lag luam. Nws txoj cai technical yog qhov yooj yim thiab nws qhov kev loj hlob yog siab. Nyob rau tib lub sijhawm, muaj cov khoom lag luam paub tab thiab kev ua haujlwm siab rau cov mem tes laser emission, txais tos thiab ua haujlwm. Tsis tas li ntawd, twb muaj coob tus paub tab TOF cov kev daws teeb meem thiab cov khoom sib xyaw ua ke, uas tuaj yeem ua tau raws li kev xav tau ntawm kev lag luam. Feem ntau Lidars siv cov txheej txheem no. Txawm li cas los xij, tseem muaj ntau yam teeb meem uas yuav tsum tau daws sai sai: thawj zaug yog qhov tsis zoo los tiv thaiv kev cuam tshuam, thiab txoj hauv kev kom tau txais cov teeb liab ncha los ntawm kev tshawb pom ncaj qha yog cuam tshuam rau lub teeb pom kev cuam tshuam, uas ua rau muaj kev nyab xeeb; Qhov thib ob yog qhov tsis tshua pom kev rhiab heev thiab lub zog pulse siab. Nws tso cov kev xav tau siab dua rau kev ua haujlwm ntawm cov cuab yeej thiab tib neeg qhov muag kev nyab xeeb; qhov thib peb yog qhov teeb meem ntawm txhua qhov huab cua ua haujlwm. Txoj kev no yooj yim cuam tshuam los ntawm huab cua phem xws li nag, huab cua, thiab daus. Txawv kev ruaj ntseg lidar manufacturers tau npaj cov kev daws teeb meem. Ntawm lawv, Beixing Photon TF03 kev ruaj ntseg lidar siv ntau lub tshuab ncha thiab sib txuas cov txheej txheem them nyiaj rau sab nraum zoov lub teeb muaj zog thiab nag, daus thiab pos huab ib puag ncig kom ntseeg tau tias muaj kev ntseeg siab nyob rau hauv qhov hnyav sab nraum zoov.

Fig. 1 Schematic of pulsed TOF LiDAR

Kev kuaj pom AMCW txawv ntawm qhov ntsuas pulse ncaj qha. Nws emits ib tug nruam laser teeb liab thiab modulates lub amplitude ntawm lub laser emission teeb liab. Qhov kev ncua deb yog ntsuas los ntawm kev txheeb xyuas cov theem sib txawv ntawm lub ncha teeb liab thiab lub teeb liab emission. Lub hauv paus ntsiab lus muaj nyob rau hauv daim duab 2. qhia. AMCW feem ntau yog tsim rau luv mus rau nruab nrab deb, xws li nrhiav kom tau deb ntawm kaum ntawm meters mus rau pua pua meters. Nws txoj kev tshawb pom tshwj xeeb yog qhov tsim nyog rau kev paub txog flash scanning ntawm cov khoom hauv xeev cov arrays. Nyob rau tib lub sijhawm, cov theem-raws li qhov tseeb yog siab, feem ntau mus txog qib millimeter.

Fig. 2 Schematic of AMCW LiDAR

FMCW tshawb pom siv cov kab hluav taws xob hloov pauv hloov pauv hloov pauv laser, thiab tau txais cov ntaub ntawv nyob deb ntawm lub hom phiaj thiab nrawm nrawm los ntawm kev sib piv qhov sib txawv ntawm qhov sib txawv ntawm lub teeb pom kev zoo thiab lub teeb liab oscillator hauv zos. Lub hauv paus ntsiab lus tau pom nyob rau hauv daim duab 3. Piv nrog rau thawj ob, nws qhov zoo tshaj plaws yog tias nws tuaj yeem ntsuas qhov deb ntawm lub hom phiaj thiab Doppler radial txheeb ze tshaj tawm tib lub sijhawm, tuaj yeem muab cov ntaub ntawv 4D, pab faib cov hom phiaj, thiab muaj daim ntawv thov dav dua; nws kuj muaj zog tiv thaiv kev cuam tshuam thiab ntau dua rhiab heev. Tsis tas li ntawd, txoj kev tshawb nrhiav no tsim nyog rau cov nqi qis qis siv silicon photonics thiab phased array thev naus laus zis, tab sis cov thev naus laus zis tam sim no loj hlob tsawg thiab cov khoom siv kuj tseem kim.

Fig. 3 Schematic of FMCW LiDAR

Txhua ntawm peb qhov kev daws teeb meem muaj nws tus yam ntxwv thiab daim ntawv thov tus nqi. Piv nrog rau TOF nrhiav pom thiab AMCW kev daws teeb meem, FMCW thev naus laus zis muaj txiaj ntsig zoo thiab muaj peev xwm loj heev ntawm cov thev naus laus zis kom loj hlob thiab cov nqi ua haujlwm. Txawm li cas los xij, txog tam sim no, tseem muaj teeb meem hauv daim ntawv thov FMCW kev daws teeb meem hauv kev lag luam kev ruaj ntseg. Cov khoom siv ua haujlwm siab xav tau yog tus nqi kim thiab tsis tuaj yeem tsim tau ntau ntau. Nrog rau txoj kev loj hlob ntawm semiconductor technology, siv photonic integration technology los tsim on-chip integrated lidar yog ib qho tseem ceeb qauv nyob rau hauv lub neej yav tom ntej txoj kev loj hlob.

Cov ntaub ntawv tiv tauj:

Yog tias koj muaj lus nug, thov hu rau peb. Txawm peb cov neeg muas zaub nyob qhov twg thiab peb cov kev xav tau yog dab tsi, peb yuav ua raws li peb lub hom phiaj los muab peb cov neeg siv khoom zoo, tus nqi qis, thiab kev pabcuam zoo tshaj plaws.