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Direct Time-of-Flight (dTOF) tekinoroji inzira itsva yekuyera chaizvo nguva yekubhururuka kwechiedza, uchishandisa nzira yeTime Correlated Single Photon Counting (TCSPC). Iyi tekinoroji yakakosha kune akasiyana maapplication, kubva padhuze sensing mumagetsi evatengi kune epamberi LiDAR masisitimu mumashandisi emotokari. Pakati payo, dTOF masisitimu ane akati wandei akakosha zvikamu, chimwe nechimwe chichiita basa rakakosha mukuona kwakaringana kuyerwa kureba.
Izvo Zvikamu Zvikamu zveDTOF Systems
Laser Driver uye Laser
Mutyairi welaser, chikamu chakakosha cheiyo transmitter wedunhu, inogadzira masaini edhijitari pulse kudzora kubuda kwelaser kuburikidza neMOSFET switching. Lasers, kunyanyaVertical Cavity Surface Emitting Lasers(VCSELs), anofarirwa kune yakatetepa spectrum, yakakwirira simba kusimba, kukurumidza modulation kugona, uye nyore kusanganisa. Zvichienderana nekushandiswa, wavelengths ye850nm kana 940nm inosarudzwa kuenzanisa pakati pe solar spectrum absorption peaks uye sensor quantum kunyatsoita.
Kutumira uye Kugamuchira Optics
Padivi rekufambisira, rakareruka optical lens kana musanganiswa wemalenzi anopindirana uye Diffractive Optical Elements (DOEs) inotungamira danda relaser kuyambuka munda unodiwa wekuona. Iwo anogashira optics, ane chinangwa chekuunganidza mwenje mukati menzvimbo inotariswa yekuona, inobatsirwa kubva kumalenzi ane yakaderera F-nhamba uye yakakwirira hama yekuvhenekesa, padivi penarrowband mafirita kuti abvise kunze kwekukanganisa kwechiedza.
SPAD uye SiPM Sensors
Single-photon avalanche diodes (SPAD) uye Silicon photomultipliers (SiPM) ndiwo makuru sensors mudTOF systems. MaSPAD anosiyaniswa nekugona kwavo kupindura kune imwe chete mafotoni, zvichikonzera yakasimba avalanche ikozvino ine imwe chete photon, ichiita kuti ive yakakodzera kune yakakwirira-chaiyo kuyerwa. Nekudaro, saizi yavo yakakura yepixel kana ichienzaniswa neyechinyakare CMOS sensors inodzikamisa kugadziriswa kwenzvimbo yedTOF masisitimu.
Nguva-ku-Digital Shanduri (TDC)
Dunhu reTDC rinoshandura masaini eanalog mumasaini edhijitari anomiririrwa nenguva, achitora nguva chaiyo yega yega photon pulse inorekodhwa. Kurongeka uku kwakakosha pakuona nzvimbo yechinhu chinonangwa zvichibva pahistogram yemapurusi akarekodhwa.
Kuongorora dTOF Performance Parameters
Detection Range uye Kururama
Iyo yekuona huwandu hweiyo dTOF sisitimu inotambanukira kusvika kure semapombi ayo emwenje anogona kufamba uye kuratidzwa kudzoka kune sensor, inozivikanwa zvakasiyana kubva kune ruzha. Kune zvemagetsi zvevatengi, zvinotariswa kazhinji zviri mukati me5m renji, uchishandisa VCSELs, nepo mota dzekushandisa dzinogona kuda kuonekwa siyana dze100m kana kudarika, zvichidikanwa tekinoroji dzakasiyana seEEL kanafiber lasers.
tinya pano kuti udzidze zvakawanda nezve chigadzirwa
Maximum Unambiguous Range
Iyo yakakwira huwandu husina kujeka hunoenderana nepakati pakati pemited pulses uye modulation frequency yelaser. Semuyenzaniso, ine modulation frequency ye1MHz, iyo isina kujeka renji inogona kusvika kusvika 150m.
Precision uye Mhosho
Kurongeka muDTOF masisitimu kwakaganhurirwa neiyo pulse upamhi hwelaser, nepo zvikanganiso zvichigona kusimuka kubva kwakasiyana kusavimbika muzvikamu, kusanganisira mutyairi welaser, SPAD sensor mhinduro, uye TDC kutenderera kwedunhu. Matanho akaita sekushandisa referensi SPAD anogona kubatsira kudzikisira zvikanganiso izvi nekuisa hwaro hwenguva uye chinhambwe.
Noise uye Kupindira Resistance
dTOF masisitimu anofanirwa kukwikwidza neruzha rwekumashure, kunyanya munzvimbo dzakasimba dzechiedza. Matekiniki akadai sekushandisa akawanda eSPAD pixels ane akasiyana attenuation mazinga anogona kubatsira kugadzirisa dambudziko iri. Pamusoro pezvo, kugona kwe dTOF kusiyanisa pakati pezvakananga uye kuwanda zviratidziro zvinowedzera kusimba kwayo kubva mukukanganisika.
Spatial Resolution uye Kushandisa Simba
Kufambira mberi muSPAD sensor tekinoroji, senge shanduko kubva kumberi-kurutivi kuvhenekera (FSI) kuenda kumashure-kurutivi kuvhenekera (BSI) maitiro, yakawedzera zvakanyanya kuvandudza mafoton absorption mazinga uye sensor kunyatsoshanda. Kufambira mberi uku, kwakasanganiswa neiyo pulsed nature yedTOF masisitimu, inokonzeresa kuderera kwesimba rekushandisa zvichienzaniswa neinoenderera mberi mafungu masisitimu senge iTOF.
Ramangwana reDTOF Technology
Kunyangwe zvipingamupinyi zvehunyanzvi zvehunyanzvi uye mutengo wakabatana neiyo dTOF tekinoroji, zvakanakira kwayo mukurongeka, huwandu, uye kugona kwesimba kunoita kuti ive mumiriri anovimbisa wekushandisa mune ramangwana munzvimbo dzakasiyana. Sezvo tekinoroji tekinoroji uye dhizaini yemagetsi dhizaini iri kuramba ichishanduka, masisitimu edTOF akagadzirira kutorwa zvakanyanya, kutyaira hunyanzvi mumagetsi evatengi, kuchengetedzwa kwemotokari, uye nezvimwe.
- Kubva pawebhu peji02.02 TOF系统 第二章 dTOF系统 - 超光 Inokurumidza kupfuura chiedza (faster-than-light.net)
- nemunyori: Chao Guang
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Nguva yekutumira: Mar-07-2024