Ohauru ki ā Mātou Pāpāho Hapori mō te Pou Whakaoho
Ko te hangarau Direct Time-of-Flight (dTOF) he huarahi auaha hei ine tika i te wā rere o te mārama, mā te whakamahi i te tikanga Time Correlated Single Photon Counting (TCSPC). He mea nui tēnei hangarau ki ngā momo tono maha, mai i te kite tata i roto i ngā taputapu hiko kaihoko ki ngā pūnaha LiDAR matatau i roto i ngā tono motuka. I tōna pūtake, he maha ngā wāhanga matua o ngā pūnaha dTOF, he mea nui ia wāhanga ki te whakarite i ngā ine tawhiti tika.
Ngā Wāhanga Matua o ngā Pūnaha dTOF
Atekōkiri Reiti me te Reiti
Ko te taraiwa taiaho, he wāhanga matua o te ara iahiko tuku, ka whakaputa i ngā tohu pāoro matihiko hei whakahaere i te tukunga o te taiaho mā te whakawhiti MOSFET. Ko ngā taiaho, inā koaNgā Taiaho Tuku Mata Kōhao Poutū(VCSEL), e paingia ana mō ō rātou whānuitanga whāiti, te kaha nui o te pūngao, ngā āheinga whakarerekētanga tere, me te ngāwari o te whakauru. I runga i te tono, ka tīpakohia ngā roangaru o te 850nm, 940nm rānei hei taurite i waenga i ngā tihi mimiti whānuitanga o te rā me te whai huatanga o te pūoko.
Te Tuku me te Whiwhi i ngā Tirohanga Mata
I te taha tuku, ka ārahihia te hihi laser e te karu arotahi whatu māmā, e te huinga rānei o ngā karu arotahi whakarara me ngā Huānga Whatu Whakarara (DOE) puta noa i te tirohanga e hiahiatia ana. Ko ngā karu arotahi e whiwhi ana, e aro ana ki te kohikohi mārama i roto i te tirohanga ūnga, ka whai hua mai i ngā karu arotahi he iti ake ngā tau-F me te māramatanga whanaunga teitei ake, me ngā tātari whāiti hei whakakore i te pokanoa mārama ke.
Ngā Pūoko SPAD me SiPM
Ko ngā pūoko matua o ngā pūnaha dTOF ko ngā diode avalanche photon kotahi (SPAD) me ngā whakarea whakaahua Silicon (SiPM). He rerekē ngā SPAD nā tō rātou kaha ki te urupare ki ngā photon takitahi, ka whakaoho i te ia avalanche kaha me te photon kotahi anake, ā, he mea pai mō ngā inenga tino tika. Heoi, ko te rahi o ō rātou pika nui ake i ngā pūoko CMOS tuku iho ka whakawhāiti i te taumira ā-wāhi o ngā pūnaha dTOF.
Kaitahuri Wā-ki-Mamati (TDC)
Ka whakamāori te ara iahiko TDC i ngā tohu anaro ki ngā tohu matihiko e tohuhia ana e te wā, ka hopu i te wā tika e tuhia ana ia pātō photon. He mea nui tēnei tika mō te whakatau i te tūranga o te mea ūnga i runga i te histogram o ngā pātō kua tuhia.
Te tūhura i ngā tawhā mahi dTOF
Te Awhe Kimi me te Tika
Ko te whānuitanga o te kitenga o te pūnaha dTOF, e ai ki te ariā, ka toro atu ki te tawhiti ka taea e ōna pāoro mārama te haere me te whakaata anō ki te pūoko, he mea wehewehe mai i te haruru. Mō ngā hikohiko kaihoko, he maha ngā wā ka arotahihia te arotahi ki roto i te whānuitanga 5m, ma te whakamahi i ngā VCSEL, engari ko ngā tono motuka ka hiahia pea ki ngā whānuitanga kitenga o te 100m, neke atu rānei, me ngā hangarau rerekē pēnei i te EEL, tengā taiaho muka.
pāwhiri ki konei kia mōhio atu ai mō te hua
Te Awhe Tino Korekore
Ko te whānuitanga mōrahi kāore he rangirua, e whakawhirinaki ana ki te wā i waenga i ngā pāorooro e tukuna ana me te auau whakarerekētanga o te taiaho. Hei tauira, me te auau whakarerekētanga o te 1MHz, ka taea e te whānuitanga mārama te eke ki te 150m.
Te Tika me te Hapa
Ko te whānui o te pā o te taiaho te mea e whakawhāitihia ana te tika o ngā pūnaha dTOF, engari ka puta ake ngā hapa mai i ngā āhuatanga koretake o ngā wāhanga, tae atu ki te taraiwa taiaho, te urupare a te pūoko SPAD, me te tika o te ara iahiko TDC. Ka taea e ngā rautaki pēnei i te whakamahi i te SPAD tohutoro te āwhina ki te whakaiti i ēnei hapa mā te whakatū i tētahi tūāpapa mō te wā me te tawhiti.
Ātete Haruru me te Whakararuraru
Me aro atu ngā pūnaha dTOF ki te haruru papamuri, inā koa i roto i ngā taiao mārama kaha. Ka taea e ngā tikanga pēnei i te whakamahi i ngā pika SPAD maha me ngā taumata whakaiti rerekē te āwhina ki te whakahaere i tēnei wero. Hei tāpiri, ko te kaha o dTOF ki te wehewehe i waenga i ngā whakaata tika me ngā whakaata maha-ara ka whakarei ake i tōna pakari ki te pokanoa.
Te Whakataunga Wāhi me te Whakamahinga Hiko
Nā ngā whanaketanga o te hangarau pūoko SPAD, pērā i te whakawhiti mai i ngā tukanga whakamārama taha-mua (FSI) ki te whakamārama taha-muri (BSI), kua tino pai ake ngā tere mimiti photon me te whai huatanga o te pūoko. Nā tēnei whanaketanga, me te āhua pupuhi o ngā pūnaha dTOF, ka iti ake te whakamahinga hiko ki te whakataurite ki ngā pūnaha ngaru tonu pērā i te iTOF.
Te Anamata o te Hangarau dTOF
Ahakoa ngā arai hangarau me ngā utu nui e pā ana ki te hangarau dTOF, ko ōna painga ki te tika, te whānuitanga, me te whai huatanga o te mana he mea whai hua mō ngā tono ā muri ake nei i roto i ngā mara kanorau. I te whanaketanga tonu o te hangarau pūoko me te hoahoa ara iahiko hiko, kua rite ngā pūnaha dTOF mō te whānui ake o te whakamahinga, e akiaki ana i ngā auahatanga i roto i ngā hikohiko kaihoko, te haumaru motuka, me tua atu.
- Mai i te whārangi tukutuku02.02 TOF系统 第二章 dTOF系统 - 超光 Tere ake i te marama (faster-than-light.net)
- nā te kaituhi: Chao Guang
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Wā tuku: Maehe-07-2024