Izindaba - I-Lidar Remote Sensing: Umgomo, uhlelo lokusebenza, izinsiza zedatha yamahhala

Bhalisela imidiya yethu yezenhlalo yokuthumela okusheshayo

Izinzwa ze-lidar ezi-airborneKungathatha amaphuzu athile kusuka ku-Laser Pulse, eyaziwa ngokuthi izilinganiso zokubuyisa ama-discrete, noma ukuqopha isinali eliphelele njengoba libuya, libize ngokugcwele ama-wave-wavelform, ngezikhathi ezithile ezifana ne-15 cm). I-lingidar ephelele ye-wave-wave isetshenziswa kakhulu emahlathini, ngenkathi ubuyela emuva kwe-lidar inezicelo ezibanzi kuwo wonke amasimu ahlukahlukene. Le ndatshana yaxoxa ngokuyinhloko yokubuyisa i-lidar nokusetshenziswa kwayo. Kulesi sahluko, sizofaka izihloko eziningana ezibalulekile mayelana ne-lidar, kufaka phakathi izingxenye zalo eziyisisekelo, ukuthi isebenza kanjani, ukunemba kwayo, izinhlelo nezinsizakusebenza ezitholakalayo.

Izingxenye eziyisisekelo ze-lidar

Izinhlelo ezisuselwa emhlabathini zivame ukusebenzisa ama-lasers ngama-wavelength aphakathi kuka-500-600 nm, ngenkathi amasistimu we-lingborne lidar esebenzisa ama-lasers ane-wavelength ende, esukela ku-1000-1600 NM. Ukusetha okujwayelekile kwe-lidar ye-lidar kufaka isithwebuli se-laser, iyunithi yokulinganisa ibanga (iyunithi eliphansi), nezinhlelo zokulawula, ukuqapha kanye nokuqopha. Kubandakanya futhi uhlelo lokuhlukanisa lomhlaba oluhlukile (i-DGPs) kanye neyunithi yokulinganisa ingxenye (IMU), evame ukuhlanganiswa ohlelweni olulodwa olwaziwa ngokuthi isikhundla nohlelo lokuma. Lolu hlelo luhlinzeka ngendawo eqondile (i-longitude,, i-latitude, kanye nokuphakama) nokuqondiswa (ukugoqa, iphimbo, kanye nesihloko) idatha.

Amaphethini lapho i-laser iskena indawo ingahluka, kufaka phakathi i-zigzag, ukufana, noma izindlela ze-elliptical. Inhlanganisela yedatha ye-DGPS ne-IMU, kanye nedatha yokulinganisa kanye namapharamitha akhulayo, ivumela uhlelo ukucubungula ngokunembile amaphuzu aqoqiwe ama-laser. Lawa maphuzu abese ayabelwa izixhumanisi (X, Y, Z) ohlelweni lokudidiyela lwendawo esebenzisa uhlelo lwe-geodetic lwe-1984 (WGS84) Datum.

Kanjani i-limidarUkuzwa okukudeSebenza? Chaza ngendlela elula

Uhlelo lwe-lidar likhipha i-laser esheshayo ye-laser ebheke entweni eqondiwe noma ebusweni.

I-laser pulses ikhombisa okuqondiwe bese ibuyela enzwa ye-lidar.

I-sensor ilinganisa ngokuqondile isikhathi esithatha isikhathi ngasinye ukushaya ilitshe bese ibuyela emuva.

Usebenzisa ijubane lokukhanya nesikhathi sokuhamba, ibanga kuya kwelitshe libalwa.

Kuhlanganiswe nesikhundla kanye nedatha yokuqagela kusuka ezinhlanganweni ze-GPS ne-IMU, izixhumanisi eziqondile ze-3D ze-laser Reflections zinqunywe.

Lokhu kuphumela efwini eliminyene le-3D limele indawo eskena noma into.

Umgomo Womzimba weLidar

Amasistimu we-Lidar asebenzisa izinhlobo ezimbili zama-lasers: I-PULSED NE-VALUD eqhubekayo. Amasistimu we-lidar adonsela ngokuthumela i-pulse ekhanyayo emfushane bese ukala isikhathi esithatha isikhathi sokuthi le shayela iye kulitshe bese libuyela kulowo owamukelayo. Lokhu kulinganiswa kwesikhathi sokujikeleza sokujikeleza kusiza ukunquma ibanga kuya kwelitshe. Isibonelo sikhonjiswa kumdwebo lapho amplitudes kubo bobabili isiginali yokukhanya edluliselwe (at) kanye nesiginali yokukhanya etholakele (AR) ayakhonjiswa. I-equation eyisisekelo esetshenziswe kulolu hlelo ifaka ijubane lokukhanya (c) nebanga kuya kwelitshe (R), ukuvumela uhlelo ukubala ibanga ngokususelwa isikhathi esingakanani sokukhanya.

Ukubuya kwe-Discrete kanye nesilinganiso esigcwele se-wave-i-wave-usebenzisa i-airborne lidar.

Uhlelo olujwayelekile lwe-motornelionne lidar.

Inqubo yokulinganisa eLidar, ebheka yomibili umtshina kanye nezimpawu zethagethi, ifingqa i-lidar equation ejwayelekile. Le equation iguqulwa kusuka ku-radar equation futhi ibalulekile ekuqondeni ukuthi izinhlelo zama-lidar zibala kanjani amabanga. Kuchaza ubudlelwano phakathi kwamandla esiginali adlulisiwe (PT) namandla esiginali atholakele (PR). Empeleni, i-equation isiza ukukala ukuthi kungakanani kokukhanya okudluliselwe kubuyiselwe ekwamukelweni ngemuva kokubonisa okuqondiwe kwelitshe, okubalulekile ekunqumeni amabanga nokwakha amamephu aqondile. Lobu budlelwano bubheka izici ezifana ne-Signal Attenuation ngenxa yebanga nokusebenzisana nge-Target ebusweni.

Izicelo zokuzwela okukude kwe-lidar

Ukuzwakala okukude kweLidar kunezicelo eziningi kuwo wonke amasimu ahlukahlukene:
 I- Terrain kanye ne-topographic imephu yokudala amamodeli wokuphakanyiswa kwedijithali (dems).
 Imephu yamahlathi ne-Vegenation ukutadisha isakhiwo se-sopy yesihlahla ne-biomass.
 Ukuqothuka Kwasogwini kanye noShoreline Ukuthola imephu yokuqapha ukuguguleka kanye nezinguquko ezingeni lolwandle.
 Ukuhlelwa kwamadolobha amadolobha kanye nengqalasizinda ye-Ingqalasizinda, kufaka phakathi amanethiwekhi namanethiwekhi okuhamba.
 Imibhalo ye-Arpheloology kanye namasiko amagugu amagugu amasayithi angokomlando kanye nezinto zobuciko.
 Ucwaningo lwe-geological kanye nezokumbiwa phansi lwemephu engaphezulu yemephu nokuqapha imisebenzi.
 Ukuzulazula Kwezimoto Ezizimele nokutholwa kwezithiyo.
Ukuhlolwa kwePlanethi, njengokuthola imephu ingaphezulu kweMars.

Ngabe udinga ukuvumelana kwamahhala?

I-Lumuspot inikeza ukuqinisekiswa kwekhwalithi ephezulu ye-notch kanye nensizakalo yokuthengisa ngemuva kokuthengisa, okuqinisekiswe yizwe, elikhethekile lezomkhakha, le-FDA, kanye no-CE. Ukuphendula kwamakhasimende okusheshayo nokuxhaswa ngemuva kokuthengisa ngemuva kokuthengisa.

Wazi okuningi ngathi

Xhumana nathi

Izinsizakusebenza ze-Lidar:

Uhlu olungaphelele lwemithombo yedatha ye-lidar kanye nesoftware yamahhala inikezwe ngezansi kwemithombo yedatha ye -lidar:
1.Ukuvula okuvulekilehttp://www.opentopography.org
2.I-USGS Earth Explorerhttp://earthexplorer.usgs.gov
3.I-United States Interagency Elevation Inventoryhttps://coast.noaa.gov/ yokusungula /
4.Ukuphathwa Kwezwe LaseNational Oceaner and Atmoskheric (NOAA)I-Digital Coo COASTTPS: //www.coast.noaa.gov/dataViewer/#
5.Wikipedia lidarhttps://en.wikipedia.org/wiki/National_Lidar_Dataset_:
6.I-Lidar Onlinehttp://www.lidar-online.com
7.Inethiwekhi Yezemvelo Yezemvelo Yezemvelo Yezemvelohttp://www.hounscience.org/data-ressource/get-data/aibrnene-data
8.Idatha ye-lidar yeSpain enyakathohttp://b5m.gipuzko.net/utl5000/en/g_22485/publi&consulta=hazlidar
9.Idatha ye-lidar ye-United Kingdomhttp://catalog.ceda.ac.uk/ hlu /? buyela_obj = OB & ID = 8049, 8042, 8051, 8053

Isoftware yamahhala ye-lidar:

1.Kudinga i-Envi. http://bcal.geology.isu.edu/ evitools.shtml
2.I-Fugroviewer(nge-lidar neminye imininingwane ye-raster / vector) http://www.fugroviewer.com/
3.I-Fusion / LDV(Ukuguqulwa kwedatha ye-Lidar, ukuguqulwa, kanye nokuhlaziywa) http: // firsys.cfr.washington.edu/
4.Amathuluzi e-LAS(Ikhodi ne-software yokufunda nokubhala les les) http: // www.cs.edu/openonenburg/lastools/
5.Insila.
6.Ama-liblas(C / C ++ Library Library yokufunda / ukubhala ifomethi ye-LA) http://www.liblas.org/
7.I-MCC-Lidar(I-Multi-Scate Classion Classic Fian ye-Lidar) I-HTTP: // Sourceforge.Net/Projects/mcClidar/
8.Mars Freeview(Ukubuka ngeso le-3d yedatha ye-lidar) http://www.merrick.com/dooppatial/software-products/mars-software
9.Hlaziya ngokuphelele(Isoftware evulekile yokucutshungulwa nokubona ngeso lengqondo amafu we-lidarpoint nama-wavefopoints) http://fulananalyze.Sourceforge.net/
10.Khomba umlingo wefu (A set of software tools for LiDAR point cloud visualiza-tion, editing, ﬁltering, 3D building modeling, and statistical analysis in forestry/ vegetation applications. Contact Dr. Cheng Wang at wangcheng@radi.ac.cn)
11.Umfundi we-terrain esheshayo(Ukubuka ngeso le-Lidar Point Clouds) http://appliedmagery.com/download angeziwe amathuluzi wesoftware ye-lidar angatholakala ekhasini le-topography lamathuluzi avulekile ku-http: //opentopo.sdsc.edu/tools/listtools.

Ukwamukela

Le ndatshana ifaka ucwaningo kusuka ku- "Lidar Rete SENEING kanye nezicelo" nguVinícius Guimarces, 2020. I-athikili ephelele iyatholakalalapha.
Lolu hlu oluphelele kanye nencazelo eningilizayo yemithombo yedatha ye-lidar ne-software yamahhala ihlinzeka ngethuluzi elibalulekile labaqeqeshiwe nabaphenyi emkhakheni wokuzwa okukude nokuhlaziywa kwendawo.

Ukuzikhulula:

Ngale ndlela simemezela ukuthi ezinye izithombe eziboniswe kwiwebhusayithi yethu ziye zaqoqwa kwi-Intanethi ngenhloso yokukhuthaza ezemfundo nokwabelana ngolwazi. Sihlonipha amalungelo obunikazi bempahla yabo bonke abadali bokuqala. Ukusetshenziswa kwalezi zithombe akuhloselwe inzuzo yezentengiso.
Uma ukholelwa ukuthi noma yikuphi okuqukethwe kusetshenziswe okwephula umthetho wakho we-copyright, sicela uxhumane nathi. Sizimisele kakhulu ukuthatha izinyathelo ezifanele, kufaka phakathi ukususa izithombe noma ukuhlinzeka ngesimo esifanele, ukuze kuqinisekiswe ukuhambisana nemithetho nemigomo yempahla yobunikazi. Umgomo wethu ukugcina ipulatifomu enothile kokuqukethwe, okulungile, futhi inhlonipho ngamalungelo abanye abantu abanobuhlakani.
Please contact us through the following contact information, email: sales@lumispot.cn. We promise to take immediate action upon receipt of any notice and guarantee 100% cooperation to resolve any such issues.