Daim ntawv thov ntawm Lidar hauv thaj tsam ntawm Atmospheric Detection Thiab Target Capture

Kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig, lub zog tshiab tsheb, tsheb ntse tau dhau los ua cov kev taw qhia ntawm Tuam Tshoj txoj kev txhim kho tsheb, cov tsheb ntse yog qhov tseem ceeb ntawm kev txhim kho cov tsheb ntse ntse thiab kev sib txuas nrog lub tsheb ntse. Autonomous intelligent tsheb thiab network-connected ntse tsheb kom ua tiav cov hauj lwm saum toj no tsis tuaj yeem pom tau tsuas yog los ntawm kev sib sau ua ke microwave radar zoo tib yam, kom ua tiav cov haujlwm saum toj no, LiDAR yog ib qho tseem ceeb hauv kev tswj hwm ntawm cov hluav taws xob hluav taws xob ntawm autonomous ntse tsheb thiab network. - txuas cov tsheb ntse.

Lidar muaj cov yam ntxwv ntawm txoj kab nqaim, me me, ntsuas tsis sib cuag, thiab lwm yam. Nws tuaj yeem ntes huab, aerosol, huab cua cua, huab cua paug, kub thiab av noo hloov thiab lwm yam tsis. Nws siv optical zaus band rau kev tshawb nrhiav, uas yog ntau qhov kev txiav txim siab siab tshaj millimeter nthwv dej, thiab qhov kev kuaj pom tseeb yog qhov zoo dua li microwave radar. Yog li ntawd, LiDAR muaj ib tug dav daim ntawv thov kev cia siab nyob rau hauv lub teb ntawm atmospheric detection thiab lub hom phiaj capture.

Tam sim no, lub scanning LIDAR uas yuav siv tau nyob rau hauv lub tsheb txawj ntse yog txhua yam rotating LIDAR, microelectromechanical system scanning radar thiab phased array LIDAR. Mechanical rotating LiDAR (LiDAR uas xa, tau txais, thiab tig rau ntawm ib qho axis) yog qhov paub tab tam sim no, thiab twb muaj lub tswv yim tsis muaj neeg tsav tsheb sim tshuab tig LiDAR li. Scanning radar raws li microelectromechanical systems (MEMS) tam sim no belongs rau lub xeev ntawm kev tshawb fawb kos duab, uas yog raws li lub hauv paus ntsiab lus ntawm kev hloov kho qhov muag los ntawm MEMS scanning iav. Phased-array lidar yog pom tau los ntawm point-by-point scanning, piv txwv li, hloov txoj kev kho qhov muag los ntawm theem emission ntawm lub teeb laser tawm ntawm ntau lub kav hlau txais xov me me. Ib qhov chaw-array LIDAR emits ib qhov chaw ntawm lub teeb, thiab qhov teeb meem tseem ceeb yog qhov kev tshawb pom luv luv.

Nyob rau hauv lub sij hawm-ntawm-flight ToFLiDAR, lub laser emits lub teeb pulses ntawm lub sij hawm τ uas qhib lub moos sab hauv ntawm lub sij hawm Circuit Court ntawm instant emission. Lub teeb mem tes qhia los ntawm lub hom phiaj tuaj txog ntawm lub photodetector nrog ib qho hluav taws xob tso zis hluav taws xob uas cuam tshuam lub moos. Qhov ntsuas hluav taws xob ncig ncig mus ncig ToFΔt suav qhov kev ncua deb ntawm lub hom phiaj mus rau qhov taw tes ntawm kev xav R. Yog tias qhov tseeb ntawm lub laser thiab photodetector nyob ntawm tib txoj haujlwm, qhov kev ncua deb R cuam tshuam los ntawm ob yam: c yog qhov ceev ntawm lub teeb hauv lub tshuab nqus tsev, thiab n yog qhov ntsuas qhov ntsuas ntawm qhov nruab nrab ntawm kev nthuav tawm (uas yog ze rau 1 hauv huab cua). Ob yam no cuam tshuam qhov kev daws teeb meem nyob deb ΔR: yog tias txoj kab uas hla ntawm lub laser dot loj dua qhov loj ntawm lub hom phiaj yuav tsum tau daws, qhov tsis paub meej ntawm qhov ntsuas Δt thiab qhov dav dav ntawm lub mem tes w (w =} cτ ) yog ΔΔt. Nyob rau hauv ib tug raug automotive LiDAR system, lub laser tsim pulses nrog ntev li ntawm 4 ns, thiab yog li ntawd ib tug tsawg kawg nkaus beam divergence lub kaum sab xis yog tsim nyog.

Qhov tseem ceeb tshaj plaws rau tus tsim qauv ntawm lub tsheb LiDAR yog qhov kev xaiv ntawm lub wavelength ntawm lub teeb. Qhov ob qhov nrov tshaj plaws wavelengths yog 905nm thiab 1550nm, uas yog ib qho teeb meem nyuaj rau tsheb LiDAR vim muaj huab cua ntau heev thiab muaj peev xwm cuam tshuam rau qhov chaw zoo. Nyob rau hauv lub ntiaj teb no tiag tiag ib puag ncig, yeej muaj tsawg lub teeb poob ntawm 905nm vim muaj zog nqus ntawm 1550nm dua li ntawm 905nm.

Lidar-related technology algorithms nyob rau hauv cov tsoos tseem ceeb modules tseem yuav tsum tau ua kom zoo dua lub teeb yuag, raug, robustness, thiab generalization, semantic maps thiab kev koom ua ke ntawm kev sib sib zog nqus kev kawm tau ua ib tug qauv, thiab lwm yam sensors uas muaj peev xwm ua tau autonomous localization ntawm qhov chaw, xws li. Raws li lub koob yees duab qhov tob, millimeter-yoj radar, thiab lwm yam., ntau qhov chaw fusion kuj yog qhov chaw kub ntawm kev tshawb fawb tam sim no, thiab Lidar-txog thev naus laus zis rau cov platforms tsis muaj neeg siv kom ua tiav txoj kev loj hlob ntawm kev txawj ntse ntawm tus kheej yog khi kom muaj LIDAR ntsig txog thev naus laus zis. muaj kev cuam tshuam deb ntawm kev txhim kho ntawm cov platforms tsis muaj neeg siv kom paub txog kev txawj ntse ntawm tus kheej.