Kwiyandikisha Mubitangazamakuru Byacu Kubyihuta
Ikoreshwa rya Direct-of-Flight (dTOF) ni uburyo bushya bwo gupima neza igihe cyo kuguruka cyumucyo, ukoresheje uburyo bujyanye na Photon Counting (TCSPC).Iri koranabuhanga ni ntangarugero mubikorwa bitandukanye, uhereye hafi yo kwiyumvisha hafi ya elegitoroniki y’abaguzi kugeza kuri sisitemu ya LiDAR igezweho mu gukoresha amamodoka.Muri rusange, sisitemu ya dTOF igizwe nibice byinshi byingenzi, buri kimwe kigira uruhare runini mugupima intera nyayo.
Ibice Byibanze bya sisitemu ya dTOF
Umushoferi wa Laser na Laser
Umushoferi wa lazeri, igice cyingenzi cyumuzunguruko, atanga ibimenyetso bya pulse ya digitale kugirango igenzure imyuka ya laser ikoresheje MOSFET.Lazeri, cyaneUbuso bwa Vertical Cavity Ubuso Bwohereza Laser.Ukurikije porogaramu, uburebure bwumurambararo wa 850nm cyangwa 940nm bwatoranijwe kugirango buringanize hagati yimirasire yizuba ryizuba hamwe na sensor ya kwant ikora neza.
Kohereza no kwakira optique
Kuruhande rwikwirakwiza, lensike yoroheje ya optique cyangwa ihuriro ryo guhuza lens hamwe na Diffractive Optical Elements (DOEs) iyobora urumuri rwa laser kuruhande rwifuzwa.Kwakira optique, igamije gukusanya urumuri murwego rwo kureba, kungukirwa ninzira zifite F-nimero yo hasi hamwe no kumurika cyane ugereranije, hamwe nu muyoboro mugufi wo kuyungurura kugirango ukureho urumuri rudasanzwe.
Umuyoboro wa SPAD na SiPM
Diode imwe ya fotone ya avalanche (SPAD) hamwe na Silicon Photomultipliers (SiPM) nibyo byuma byibanze muri sisitemu ya dTOF.SPAD itandukanijwe nubushobozi bwabo bwo gusubiza fotone imwe, bigatera umuyaga mwinshi wa avalanche hamwe na fotone imwe gusa, bigatuma biba byiza kubipima neza.Nyamara, ubunini bwa pigiseli nini ugereranije na gakondo ya CMOS igabanya imiterere ya sisitemu ya dTOF.
Igihe-Kuri-Guhindura Digital (TDC)
Umuzunguruko wa TDC uhindura ibimenyetso bisa mubimenyetso bya digitale bigereranwa nigihe, bifata umwanya nyawo buri fotone ya pulon yanditswe.Uku kuri ningirakamaro muguhitamo umwanya wikintu gishingiye kuri histogramu ya pulses yanditse.
Gucukumbura ibipimo bya dTOF
Urutonde rwo kumenya no kumenya ukuri
Urutonde rwo kumenya sisitemu ya dTOF mu buryo bw'igitekerezo rugera kure kugeza aho impanuka zayo zishobora kugenda kandi bikagaruka kuri sensor, bigaragazwa neza n'urusaku.Kubikoresho bya elegitoroniki byabaguzi, intumbero akenshi iba iri hagati ya 5m, ukoresheje VCSELs, mugihe porogaramu zikoresha imodoka zishobora gusaba intera ya 100m cyangwa irenga, bisaba ikoranabuhanga ritandukanye nka EEL cyangwalaseri.
kanda hano kugirango umenye byinshi kubicuruzwa
Urwego ntarengwa
Intera ntarengwa idafite ibisobanuro biterwa nintera iri hagati yimisemburo yasohotse ninshuro ya moderi ya laser.Kurugero, hamwe na modulation inshuro ya 1MHz, intera idasobanutse irashobora kugera kuri 150m.
Ikosa n'amakosa
Ubusobanuro muri sisitemu ya dTOF busanzwe bugarukira kubugari bwa pulse ya lazeri, mugihe amakosa ashobora guturuka kubintu bitazwi neza mubice, harimo umushoferi wa laser, igisubizo cya sensor ya SPAD, hamwe numurongo wa TDC.Ingamba nko gukoresha reference SPAD irashobora gufasha kugabanya ayo makosa mugushiraho umurongo wigihe nintera.
Urusaku no Kwivanga Kurwanya
Sisitemu ya dTOF igomba guhangana n urusaku rwimbere, cyane cyane mumucyo ukomeye.Ubuhanga nko gukoresha pigiseli nyinshi za SPAD hamwe ninzego zinyuranye zishobora gufasha gukemura iki kibazo.Byongeye kandi, ubushobozi bwa dTOF bwo gutandukanya ibitekerezo bitaziguye kandi byinshi byongerera imbaraga imbaraga zo kwivanga.
Gukemura ahantu hamwe no gukoresha ingufu
Iterambere mu buhanga bwa sensor ya SPAD, nko kuva kumurika imbere (FSI) kugera kumurongo winyuma (BSI), byazamuye cyane igipimo cyo kwinjiza fotone no gukora neza.Iri terambere, rifatanije na pulsed ya sisitemu ya dTOF, bivamo gukoresha ingufu nke ugereranije na sisitemu ikomeza nka iTOF.
Ejo hazaza h'ikoranabuhanga rya dTOF
Nubwo inzitizi zikomeye za tekiniki hamwe nigiciro kijyanye na tekinoroji ya dTOF, ibyiza byayo muburyo bwuzuye, intera, hamwe nubushobozi bwimbaraga bituma iba umukandida utanga ikizere mubisabwa ejo hazaza mubice bitandukanye.Mugihe tekinoroji ya sensor hamwe nubushakashatsi bwumuzunguruko bikomeje kugenda bitera imbere, sisitemu ya dTOF yiteguye kwaguka kwinshi, gutwara udushya muri elegitoroniki y’abaguzi, umutekano w’ibinyabiziga, ndetse n’ibindi.
- Kuva kurupapuro02.02 TOF 系统 第二 章 dTOF 系统 - 超 aster Byihuta kuruta urumuri (byihuse-umucyo-umucyo.net)
- n'umwanditsi: Chao Guang
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Igihe cyo kohereza: Werurwe-07-2024