Nhau - dTOF sensor: Musimboti wekushanda uye zvikamu zvakakosha.

Nyorera kuSocial Media Yedu Kuti Uwane Chiziviso Chinokurumidza

Tekinoroji yeDirect Time-of-Flight (dTOF) inzira itsva yekuyera nguva yekubhururuka kwechiedza, uchishandisa nzira yeTime Correlated Single Photon Counting (TCSPC). Tekinoroji iyi yakakosha kune akasiyana mashandisirwo, kubva pakuona pedyo mumagetsi evatengi kusvika kune masisitimu eLiDAR epamusoro mumashandisirwo emotokari. Pachinyanya chayo, masisitimu edTOF ane zvikamu zvakakosha, chimwe nechimwe chichiita basa rakakosha mukuona kuti daro rakarurama.

Zvikamu Zvikuru zveDTOF Systems

Mutyairi weLaser neLaser

Mutyairi welaser, chikamu chakakosha chetransmitter circuit, anogadzira masaini edhijitari ekudzora kubuda kwelaser kuburikidza neMOSFET switching.MaLaser Anoburitsa Mvura Pamusoro Pemugero Wakamira(VCSELs), dzinofarirwa nekuda kwesimba radzo rakamanikana, simba rakawanda, kugona kwekuchinja-chinja nekukurumidza, uye nyore kubatanidzwa. Zvichienderana nekushandiswa, marefu e850nm kana 940nm anosarudzwa kuti aenzane pakati pemapeji ekunyudzwa kwesimba rezuva uye kushanda zvakanaka kwesensor quantum.

Kutumira uye Kugamuchira Magirazi

Kudivi rekutumira, lenzi iri nyore kana musanganiswa wemalenzi ecollimating neDiffractive Optical Elements (DOEs) zvinotungamira mwenje welaser munzvimbo yaunoda kuona. Magirazi anogamuchira, akagadzirirwa kuunganidza chiedza munzvimbo yaunoda kuona, anobatsirwa nemalenzi ane nhamba dzeF shoma uye chiedza chakakwira, pamwe chete nemafirita ebhandi rakatetepa kuti abvise kukanganiswa kwechiedza chiri kunze.

Masensa eSPAD neSiPM

Ma "single-photon avalanche diodes" (SPAD) ne "Silicon photomultipliers" (SiPM) ndiwo masensa makuru mu "dTOF systems". Ma "SPAD" anozivikanwa nekukwanisa kwawo kupindura kune "single photons", zvichikonzera "avalanche current" yakasimba ne "photon" imwe chete, zvichiita kuti akwanise kuyera zvinhu nemazvo. Zvisinei, saizi yawo yakakura ye "pixel" kana ichienzaniswa ne "CMOS sensors" dzekare dzinoderedza kugona kwe "spatial resolution" yema "dTOF systems".

Chishanduri Chenguva-Kuita-Dhijitari (TDC)

Dunhu reTDC rinoshandura masaini eanalog kuita masaini edhijitari anomiririrwa nenguva, richitora nguva chaiyo inonyorwa pulse yega yega yephoton. Kurongeka uku kwakakosha pakuona nzvimbo yechinhu chakanangana nacho zvichibva pahistogram yemasaini akarekodhwa.

Kuongorora maParameter ekushanda kwedTOF

Kuwanikwa Kwenzvimbo uye Kururama

Rudzi rwekuona rwe dTOF system runosvika kure nekukwanisa kufamba kwechiedza chayo uye runogona kudzoserwa ku sensor, rwunozivikanwa zvakasiyana neruzha. Kune vatengi vemagetsi, chinangwa chinowanzo kuve mukati me5m range, vachishandisa VCSELs, nepo maapplication emotokari angada rudzi rwekuona rwe100m kana kupfuura, zvichireva matekinoroji akasiyana senge EELs kanamalaser efaibha.

tinya pano kuti udzidze zvakawanda nezvechigadzirwa ichi

Nzvimbo Yakanyanya Kujeka

Range yepamusoro isina kujeka inoenderana nenguva iri pakati pemapulse anoburitswa uye modulation frequency yelaser. Semuenzaniso, ne modulation frequency ye1MHz, range isina kujeka inogona kusvika 150m.

Kunyatsojeka uye Chikanganiso

Kunyatsojeka mumasisitimu e dTOF kunogumira pahupamhi hwepulse yelaser, nepo zvikanganiso zvinogona kuitika nekuda kwekusaziva kwakasiyana-siyana muzvikamu, kusanganisira laser driver, SPAD sensor response, uye TDC circuit accuracy. Maitiro akadai sekushandisa reference SPAD anogona kubatsira kuderedza zvikanganiso izvi nekugadzira hwaro hwenguva nedaro.

Kuramba Ruzha uye Kupindira

Masisitimu e dTOF anofanirwa kurwisana neruzha rwekumashure, kunyanya munzvimbo dzine chiedza chakasimba. Matekiniki akadai sekushandisa ma SPAD pixels akawanda ane mazinga akasiyana ekudzikisa chiedza anogona kubatsira kugadzirisa dambudziko iri. Pamusoro pezvo, kugona kwe dTOF kusiyanisa pakati pe direct ne multipath reflections kunowedzera kusimba kwayo pakukanganiswa.

Kugadziriswa Kwenzvimbo uye Kushandiswa Kwesimba

Kufambira mberi mune tekinoroji yeSPAD sensor, senge shanduko kubva pakushanda kwechiedza chemberi (FSI) kuenda kukushanda kwechiedza chemberi (BSI), kwakavandudza zvakanyanya mwero wekupinza kwephoton uye kushanda zvakanaka kwesensa. Kufambira mberi uku, pamwe chete nekushanda kwesimba kwemasisitimu edTOF, kunoita kuti simba rishandiswe zvishoma zvichienzaniswa nemasisitimu emafungu anoenderera mberi seiTOF.

Remangwana reTekinoroji yedTOF

Pasinei nezvipingamupinyi zvehunyanzvi zvakanyanya uye mitengo inoenderana netekinoroji yedTOF, zvakanakira zvayo pakururama, kukwirira, uye kushanda zvakanaka kwesimba zvinoita kuti ive mukana wekushandisa mune ramangwana muminda yakasiyana-siyana. Sezvo tekinoroji ye sensor uye dhizaini yemagetsi ichiramba ichichinja, masisitimu edTOF akagadzirira kushandiswa zvakanyanya, achitungamira hunyanzvi mumagetsi evatengi, kuchengetedzeka kwemotokari, nezvimwewo.

Kubva pawebhusaiti02.02 TOF系统第二章 dTOF系统 - 超光 Inokurumidza kupfuura chiedza (faster-than-light.net)
rakanyorwa nemunyori: Chao Guang

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