1. Lub sijhawm ya davhlau (ToF) sensor yog dab tsi?

Lub koob yees duab lub sij hawm ntawm lub davhlau yog dab tsi? Puas yog lub koob yees duab uas ntes lub davhlau ntawm lub dav hlau? Puas muaj ib yam dab tsi ua rau cov dav hlau lossis dav hlau? Zoo, nws yog ib txoj kev ntev!

ToF yog ib qho kev ntsuas ntawm lub sij hawm nws yuav siv rau ib yam khoom, particle los yog yoj mus rau qhov deb. Koj puas paub tias tus puav tus sonar system ua haujlwm? Lub sij hawm-ntawm-flight system zoo ib yam!

Muaj ntau ntau yam ntawm lub sij hawm-ntawm-flight sensors, tab sis feem ntau yog lub sij hawm-ntawm-flight lub koob yees duab thiab laser scanners, uas siv ib tug technology hu ua lidar (lub teeb nrhiav thiab ranging) los ntsuas qhov tob ntawm ntau yam ntsiab lus nyob rau hauv ib daim duab los ntawm shining nws. nrog lub teeb infrared.

Cov ntaub ntawv tsim tawm thiab ntes siv ToF sensors yog qhov muaj txiaj ntsig zoo vim nws tuaj yeem muab cov neeg taug kev tshawb pom, kev siv cov neeg siv kev lees paub raws li lub ntsej muag, ib puag ncig daim phiaj siv SLAM (ib puag ncig hauv zos thiab daim ntawv qhia) algorithms, thiab ntau dua.

Cov kab ke no tau siv dav hauv cov neeg hlau, tsheb tsav tus kheej, thiab txawm tias tam sim no koj lub xov tooj ntawm tes. Piv txwv li, yog tias koj siv Huawei P30 Pro, Oppo RX17 Pro, LG G8 ThinQ, thiab lwm yam, koj lub xov tooj muaj lub koob yees duab ToF!

Lub koob yees duab ToF

2. Lub sijhawm ntawm lub davhlau sensor ua haujlwm li cas?

Tam sim no, peb xav muab cov lus qhia luv luv ntawm lub sijhawm ntawm lub davhlau sensor yog dab tsi thiab nws ua haujlwm li cas.

ToFsensors siv me me lasers emit infrared teeb, qhov twg lub teeb tshwm sim bounces tawm ib yam khoom thiab rov qab mus rau lub sensor. Raws li lub sij hawm sib txawv ntawm lub emission ntawm lub teeb thiab rov qab mus rau lub sensor tom qab tau reflected los ntawm cov khoom, lub sensor yuav ntsuas qhov deb ntawm cov khoom thiab lub sensor.

Niaj hnub no, peb yuav tshawb txog 2 txoj hauv kev yuav ua li cas ToF siv lub sijhawm taug kev los txiav txim siab qhov deb thiab qhov tob: siv lub sijhawm pulses, thiab siv cov theem hloov ntawm amplitude modulated nthwv dej.

Siv cov pulses raws sijhawm

Piv txwv li, nws ua haujlwm los ntawm illuminating lub hom phiaj nrog lub laser, tom qab ntawd ntsuas lub teeb pom kev zoo nrog lub scanner, thiab tom qab ntawd siv lub teeb nrawm los nthuav tawm qhov kev ncua deb ntawm cov khoom kom meej xam qhov kev ncua deb. Tsis tas li ntawd, qhov sib txawv ntawm lub sij hawm xa rov qab laser thiab wavelength yog siv los ua qhov tseeb digital 3D sawv cev thiab cov yam ntxwv ntawm lub hom phiaj, thiab pom qhov pom ntawm nws tus kheej cov yam ntxwv.

Raws li koj tuaj yeem pom saum toj no, lub teeb laser raug rho tawm tawm thiab tom qab ntawd tawm ntawm cov khoom rov qab mus rau lub sensor. Nrog rau lub sijhawm rov qab los ntawm laser, ToF cov koob yees duab tuaj yeem ntsuas qhov kev ncua deb ntawm lub sijhawm luv luv uas muab qhov nrawm ntawm lub teeb mus ncig. (ToF hloov mus rau qhov deb) Qhov no yog cov qauv uas tus kws tshuaj ntsuam siv los txog ntawm qhov deb ntawm qhov khoom:

(ceev lub teeb x lub sijhawm ya davhlau) / 2

ToF converts mus rau qhov deb

Raws li koj tau pom, lub timer yuav pib thaum lub teeb tawm, thiab thaum lub receiver tau txais lub teeb rov qab, lub timer yuav rov qab lub sij hawm. Thaum rho tawm ob zaug, qhov "lub sij hawm ntawm lub davhlau" ntawm lub teeb tau txais, thiab qhov ceev ntawm lub teeb yog qhov tsis tu ncua, yog li qhov kev ncua deb tuaj yeem suav tau yooj yim siv cov qauv saum toj no. Ua li no, tag nrho cov ntsiab lus ntawm qhov chaw ntawm qhov khoom tuaj yeem txiav txim siab.

Siv cov theem hloov ntawm AM nthwv dej

Tom ntej no, lubToFtseem tuaj yeem siv cov nthwv dej tsis tu ncua txhawm rau txheeb xyuas cov theem hloov ntawm lub teeb pom kev los txiav txim siab qhov tob thiab qhov deb.

Phase hloov siv AM yoj

Los ntawm kev hloov pauv qhov amplitude, nws tsim lub teeb pom kev sinusoidal nrog lub sijhawm paub, tso cai rau lub ntsuas ntsuas los txiav txim siab theem hloov ntawm lub teeb pom kev siv cov qauv hauv qab no:

qhov twg c yog qhov ceev ntawm lub teeb (c = 3 × 10 ^ 8 m / s), λ yog wavelength (λ = 15 m), thiab f yog qhov zaus, txhua qhov taw tes ntawm lub sensor tuaj yeem xam tau yooj yim hauv qhov tob.

Tag nrho cov no tshwm sim sai heev thaum peb ua haujlwm ntawm lub teeb nrawm. Koj puas tuaj yeem xav txog qhov tseeb thiab nrawm nrog cov sensors twg tuaj yeem ntsuas tau? Cia kuv muab piv txwv, lub teeb mus ntawm qhov nrawm ntawm 300,000 mais ib ob, yog tias ib qho khoom nyob deb ntawm koj 5m, lub sijhawm sib txawv ntawm lub teeb tawm ntawm lub koob yees duab thiab rov qab yog li 33 nanoseconds, uas tsuas yog sib npaug rau 0.000000033 vib nas this! Wow! Tsis hais, cov ntaub ntawv ntes yuav muab rau koj qhov tseeb 3D digital sawv cev rau txhua pixel hauv daim duab.

Txawm hais tias siv lub hauv paus ntsiab lus, muab lub teeb ci uas ci ntsa iab tag nrho qhov chaw tso cai rau lub sensor los txiav txim qhov tob ntawm txhua lub ntsiab lus. Cov txiaj ntsig zoo li no muab rau koj daim ntawv qhia nyob deb qhov twg txhua pixel encodes qhov kev ncua deb mus rau qhov sib thooj ntawm qhov chaw. Hauv qab no yog ib qho piv txwv ntawm ToF ntau daim duab:

Ib qho piv txwv ntawm ToF range graph

Tam sim no peb paub tias ToF ua haujlwm, vim li cas nws zoo? Vim li cas siv nws? Lawv zoo rau dab tsi? Tsis txhob txhawj, muaj ntau qhov zoo rau kev siv ToF sensor, tab sis tau kawg muaj qee qhov kev txwv.

3. Cov txiaj ntsig ntawm kev siv lub sijhawm ntawm lub davhlau sensors

Qhov tseeb thiab ceev ntsuas

Piv nrog rau lwm cov sensors nyob deb xws li ultrasound los yog lasers, lub sij hawm-ntawm-flight sensors muaj peev xwm sau 3D duab ntawm ib qho chaw sai heev. Piv txwv li, lub koob yees duab ToF tuaj yeem ua qhov no ib zaug xwb. Tsis tas li ntawd xwb, ToF sensor tuaj yeem ntes cov khoom kom raug nyob rau lub sijhawm luv luv thiab tsis cuam tshuam los ntawm cov av noo, huab cua siab thiab kub, ua rau nws tsim nyog rau kev siv sab hauv tsev thiab sab nraum zoov.

nyob deb

Txij li ToF sensors siv lasers, lawv kuj muaj peev xwm ntsuas qhov ntev thiab qhov sib txawv nrog qhov raug siab. ToF sensors hloov tau vim tias lawv tuaj yeem ntes cov khoom nyob ze thiab deb ntawm txhua daim duab thiab qhov ntau thiab tsawg.

Nws kuj yog qhov hloov pauv ntawm qhov kev nkag siab tias koj tuaj yeem hloov kho qhov optics ntawm lub kaw lus kom pom kev ua haujlwm zoo, qhov twg koj tuaj yeem xaiv lub transmitter thiab receiver hom thiab lo ntsiab muag kom tau txais qhov xav tau ntawm kev pom.

Kev nyab xeeb

Txaus siab tias laser los ntawm lubToFsensor yuav ua mob rau koj ob lub qhov muag? txhob txhawj! Ntau ToF sensors tam sim no siv lub zog qis infrared laser ua lub teeb ci thiab tsav nws nrog cov pulses modulated. Lub sensor ua tau raws li Class 1 laser kev nyab xeeb cov qauv los xyuas kom meej tias nws muaj kev nyab xeeb rau tib neeg lub qhov muag.

raug nqi

Piv nrog rau lwm yam 3D qhov tob scanning thev naus laus zis xws li teeb tsa lub koob yees duab tshuab lossis laser rangefinders, ToF sensors yog pheej yig dua piv rau lawv.

Txawm hais tias tag nrho cov kev txwv no, ToF tseem muaj kev ntseeg siab heev thiab txoj hauv kev ceev ceev ntawm kev ntes cov ntaub ntawv 3D.

4. Kev txwv ntawm ToF

Txawm hais tias ToF muaj ntau yam txiaj ntsig, nws kuj muaj kev txwv. Qee qhov kev txwv ntawm ToF suav nrog:

• Lub teeb tawg

Yog tias qhov chaw ci ntsa iab heev ze rau koj lub ToF sensor, lawv tuaj yeem tawg lub teeb ntau dhau rau hauv koj lub receiver thiab tsim cov khoom qub thiab tsis xav tau kev xav, vim tias koj lub ToF sensor tsuas yog xav tau lub teeb thaum ntsuas tau npaj.

• Ntau qhov kev xav

Thaum siv ToF sensors ntawm cov ces kaum thiab cov duab concave, lawv tuaj yeem ua rau tsis xav tau kev xav, vim tias lub teeb tuaj yeem thim tawm ntau zaus, cuam tshuam qhov ntsuas.

• Ambient teeb

Siv ToF lub koob yees duab sab nraum zoov hauv lub hnub ci ci tuaj yeem ua rau siv sab nraum zoov nyuaj. Qhov no yog vim kev siv lub hnub ci siab ua rau lub sensor pixels sai sai saturate, ua rau nws tsis yooj yim sua kom pom lub teeb tiag tiag los ntawm cov khoom.

• Qhov xaus

ToF sensors thiabToF lenstuaj yeem siv rau ntau yam kev siv. Los ntawm 3D Mapping, Industrial Automation, Obstacle Detection, Tsav Tsheb Tsav Tsheb, Kev Ua Liaj Ua Teb, Robotics, Sab Hauv Tsev Navigation, Gesture Recognition, Object Scanning, Measurements, Surveillance to Augmented Reality! Cov kev siv ntawm ToF thev naus laus zis tsis muaj qhov kawg.

Koj tuaj yeem tiv tauj peb rau txhua qhov kev xav tau ntawm ToF lo ntsiab muag.

Chuang An Optoelectronics tsom rau cov ntsiab lus siab kho qhov muag kom tsim tau lub hom phiaj pom zoo meej

Chuang An Optoelectronics tam sim no tau tsim ntau yamTOF lo ntsiab muagxws li:

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