1. Menene firikwensin lokacin tashi (ToF)?

Menene kyamarar lokacin tashi? Shin kamara ce ta ɗauki jirgin jirgin? Shin yana da alaƙa da jirage ko jirage? To, hakika yana da nisa!

ToF shine ma'aunin lokacin da ake ɗauka don abu, barbashi ko igiyar ruwa don tafiya mai nisa. Shin kun san cewa tsarin sonar jemage yana aiki? Tsarin lokaci na tashi yana kama da haka!

Akwai nau'ikan na'urori masu auna firikwensin lokacin tafiya, amma galibinsu na'urorin daukar hoto ne masu daukar lokaci da na'urar daukar hoto ta Laser, wadanda ke amfani da wata fasaha mai suna lidar (ganewar haske da jeri) don auna zurfin maki daban-daban a cikin hoto ta hanyar haskaka shi. tare da hasken infrared.

Bayanan da aka ƙirƙira da kama ta amfani da firikwensin ToF yana da matukar amfani saboda yana iya samar da gano masu tafiya a ƙasa, tantancewar mai amfani dangane da fasalin fuska, taswirar yanayi ta amfani da SLAM (wasu wuri guda ɗaya da taswira) algorithms, da ƙari.

A zahiri ana amfani da wannan tsarin a cikin mutummutumi, motoci masu tuƙi, har ma da na'urar tafi da gidanka. Misali, idan kana amfani da Huawei P30 Pro, Oppo RX17 Pro, LG G8 ThinQ, da sauransu, wayarka tana da kyamarar ToF!

Kamara ta ToF

2. Ta yaya firikwensin lokacin jirgin ke aiki?

Yanzu, muna so mu ba da taƙaitaccen gabatarwa na menene firikwensin lokacin tashi da yadda yake aiki.

ToFna'urori masu auna firikwensin suna amfani da ƙananan lasers don fitar da hasken infrared, inda sakamakon hasken ya tashi daga kowane abu kuma ya koma cikin firikwensin. Dangane da bambancin lokaci tsakanin fitowar haske da komawa ga firikwensin bayan an nuna shi ta wurin abin, firikwensin zai iya auna nisa tsakanin abu da firikwensin.

A yau, za mu bincika hanyoyi 2 yadda ToF ke amfani da lokacin tafiya don ƙayyade nisa da zurfin: ta yin amfani da bugun bugun lokaci, da kuma amfani da canjin lokaci na raƙuman ruwa masu daidaitawa.

Yi amfani da bugun jini na lokaci

Misali, tana aiki ne ta hanyar haska maƙasudi da na'urar lesar, sannan a auna hasken da ke haskakawa tare da na'urar daukar hoto, sannan ta yi amfani da saurin haske don fitar da nisan abin don a ƙididdige nisan da ya yi tafiya daidai. Bugu da kari, ana amfani da bambancin lokacin dawowar Laser da tsayin raƙuman ruwa don yin daidaitaccen wakilci na dijital na 3D da fasalin saman abin da ake niyya, da kuma taswira taswira na kowane mutum a gani.

Kamar yadda kuke gani a sama, hasken Laser yana ƙonewa sannan ya billa abin ya koma firikwensin. Tare da lokacin dawowar Laser, kyamarorin ToF suna iya auna ingantattun nisa a cikin ɗan gajeren lokaci da aka ba da saurin tafiyar haske. (ToF tana juyawa zuwa nisa) Wannan ita ce dabarar da manazarci ke amfani da ita don isa daidai nisan abu:

(gudun haske x lokacin tashi) / 2

ToF yana canzawa zuwa nisa

Kamar yadda kuke gani, mai ƙidayar lokaci zai fara yayin da hasken ke kashe, kuma lokacin da mai karɓa ya karɓi hasken dawowa, mai ƙidayar zai dawo da lokacin. Lokacin da aka cire sau biyu, ana samun "lokacin tashi" na haske, kuma saurin haske yana dawwama, don haka ana iya ƙididdige nisa cikin sauƙi ta amfani da dabarar da ke sama. Ta wannan hanyar, ana iya tantance duk maki a saman abin.

Yi amfani da canjin lokaci na igiyar AM

Na gaba, daToFHakanan zai iya amfani da raƙuman ruwa masu ci gaba don gano canjin lokaci na hasken da ke haskakawa don sanin zurfin da nisa.

Canjin lokaci ta amfani da igiyoyin AM

Ta hanyar daidaita girman girman, yana ƙirƙirar tushen hasken sinusoidal tare da sanannen mitar, yana barin mai ganowa ya ƙayyade canjin lokaci na hasken da ke haskakawa ta amfani da dabara mai zuwa:

inda c shine saurin haske (c = 3 × 10 ^ 8 m / s), λ shine tsayin raƙuman ruwa (λ = 15 m), kuma f shine mita, kowane batu akan firikwensin yana iya ƙididdigewa cikin sauƙi a cikin zurfi.

Duk waɗannan abubuwa suna faruwa da sauri yayin da muke aiki da saurin haske. Kuna iya tunanin daidaici da saurin abin da na'urori masu auna firikwensin ke iya aunawa? Bari in ba da misali, haske yana tafiya da gudun kilomita 300,000 a cikin dakika guda, idan abu yana da nisa da ku 5m, bambancin lokacin da ke tsakanin hasken da ke barin kyamara da dawowa shine kusan 33 nanoseconds, wanda yayi daidai da 0.000000033 seconds! Kai! Ba a ma maganar ba, bayanan da aka kama za su ba ku cikakkiyar wakilcin dijital na 3D ga kowane pixel a cikin hoton.

Ba tare da la'akari da ka'idar da aka yi amfani da ita ba, samar da tushen haske wanda ke haskaka duk yanayin yana ba da damar firikwensin ya ƙayyade zurfin duk maki. Irin wannan sakamakon yana ba ku taswirar nesa inda kowane pixel ke ɓoye nisa zuwa madaidaicin wurin a wurin. Mai zuwa shine misalin jadawali kewayon ToF:

Misalin jadawalin kewayon ToF

Yanzu da muka san cewa ToF yana aiki, me yasa yake da kyau? Me yasa amfani dashi? Menene amfanin su? Kada ku damu, akwai fa'idodi da yawa don amfani da firikwensin ToF, amma ba shakka akwai wasu iyakoki.

3. Fa'idodin yin amfani da na'urori masu auna firikwensin lokacin tashi

Daidaitaccen ma'auni mai sauri

Idan aka kwatanta da sauran na'urori masu auna nisa kamar duban dan tayi ko lasers, na'urori masu auna lokacin tashi sama suna iya tsara hoton 3D na wurin da sauri. Misali, kyamarar ToF zata iya yin wannan sau ɗaya kawai. Ba wai kawai ba, firikwensin ToF yana iya gano abubuwa daidai a cikin ɗan gajeren lokaci kuma zafi, matsa lamba da zafin jiki ba ya shafa, yana sa ya dace da amfani na cikin gida da waje.

nesa mai nisa

Tun da na'urori masu auna firikwensin ToF suna amfani da lasers, kuma suna da ikon auna nesa mai nisa da jeri tare da daidaito mai tsayi. Na'urori masu auna firikwensin ToF suna da sassauƙa saboda suna iya gano abubuwa kusa da nesa na kowane nau'i da girma.

Hakanan yana da sassauƙa a cikin ma'anar cewa zaku iya siffanta abubuwan gani na tsarin don ingantaccen aiki, inda zaku iya zaɓar nau'ikan watsawa da mai karɓa da ruwan tabarau don samun filin da ake so.

Tsaro

Damu cewa Laser dagaToFfirikwensin zai cutar da idanunku? kada ku damu! Yawancin na'urori masu auna firikwensin ToF yanzu suna amfani da Laser infrared mai ƙarancin ƙarfi azaman tushen haske kuma suna fitar da shi tare da ƙwararrun bugun jini. Na'urar firikwensin ya dace da ka'idodin aminci na Laser Class 1 don tabbatar da lafiya ga idon ɗan adam.

m

Idan aka kwatanta da sauran fasahohin binciken zurfin kewayon 3D kamar tsarin kyamarori da aka tsara ko na'urori masu gano laser, firikwensin ToF sun fi rahusa idan aka kwatanta da su.

Duk da waɗannan iyakoki, ToF har yanzu abin dogaro ne sosai kuma hanya ce mai sauri don ɗaukar bayanan 3D.

4. Iyakance na ToF

Kodayake ToF yana da fa'idodi da yawa, yana da iyakancewa. Wasu iyakoki na ToF sun haɗa da:

• Watsewar haske

Idan firikwensin haske suna kusa da firikwensin ToF ɗinku, suna iya watsa haske da yawa cikin mai karɓar ku kuma su ƙirƙiri kayan tarihi da abubuwan da ba'a so, tunda firikwensin ToF ɗinku kawai yana buƙatar nuna hasken da zarar an shirya auna.

• Tunani da yawa

Lokacin amfani da na'urori masu auna firikwensin ToF akan sasanninta da sifofi masu sassauƙa, suna iya haifar da tunani maras so, saboda hasken zai iya billa sau da yawa, yana karkatar da ma'auni.

• Hasken yanayi

Yin amfani da kyamarar ToF a waje a cikin hasken rana mai haske na iya yin wahalar amfani a waje. Wannan ya faru ne saboda tsananin ƙarfin hasken rana yana haifar da firikwensin firikwensin yin sauri da sauri, yana sa ba zai yiwu a gano ainihin hasken da ke fitowa daga abin ba.

• Ƙarshe

ToF firikwensin daToF ruwan tabarauana iya amfani da shi a cikin aikace-aikace iri-iri. Daga Taswirar 3D, Automation na Masana'antu, Gane cikas, Motocin Tuƙi, Noma, Robotics, Kewayawa Cikin Gida, Gane Ganewa, Binciken Abu, Ma'auni, Sa ido zuwa Haƙiƙanin Ƙarfafawa! Aikace-aikacen fasahar ToF ba su da iyaka.

Kuna iya tuntuɓar mu don kowane buƙatun ruwan tabarau na ToF.

Chuang An Optoelectronics yana mai da hankali kan manyan tabarau na gani don ƙirƙirar cikakkiyar alamar gani

Chuang An Optoelectronics yanzu ya samar da iri-iriTOF ruwan tabaraukamar:

CH3651A f3.6mm F1.2 1/2 ″ IR850nm

CH3651B f3.6mm F1.2 1/2 ″ IR940nm

CH3652A f3.3mm F1.1 1/3 ″ IR850nm

CH3652B f3.3mm F1.1 1/3 ″ IR940nm

CH3653A f3.9mm F1.1 1/3 ″ IR850nm

CH3653B f3.9mm F1.1 1/3 ″ IR940nm

CH3654A f5.0mm F1.1 1/3 ″ IR850nm

CH3654B f5.0mm F1.1 1/3 ″ IR940nm