Radar qib ntsuas ntsuas yog ntsuas ntsuas raws lub sijhawm - ntawm - txoj cai dav hlau. Nrog rau lawv qhov zoo ntawm tsis yog- ntsuas kev sib cuag, muaj zog tiv thaiv- muaj peev xwm cuam tshuam, siab precision, tsis tshua muaj txij nkawm, thiab lub neej ntev, lawv tau maj mam dhau los ua cov cuab yeej nyiam hauv ntau qhov ntsuas ntsuas dej.
Radar theem ntsuas tuaj nyob rau hauv zaus xws li 6GHz, 26GHz, 80GHz, thiab 120GHz. Hais dav dav, radar qib ntsuas kuj tuaj yeem muab faib ua siab - zaus thiab qis- zaus hom. 26G thiab 80G radar qib ntsuas yog ob hom. Qhov sib txawv tseem ceeb ntawm 26G thiab 80G radar qib ntsuas nyob rau hauv lawv qhov kev hloov pauv zaus, wavelength, ntsuas qhov tseeb, kev daws teeb meem, thiab qhov muag tsis pom kev. Feem ntau, ntau zaus radar theem meters yog kim dua.
Modulation zaus thiab wavelength
Microwaves hais txog qhov sib txawv ntawm electromagnetic tsis muaj zaus ntawm 300MHz txog 300GHz, nrog cov wavelengths sib xws ntawm 1mm mus rau 1m. Cov electromagnetic spectrum suav nrog peb pawg: decimeter tsis (ntau zaus 300MHz-3GHz), centimeter waves (ntau zaus 3 ~ 30GHz), thiab millimeter waves (ntau zaus 30 ~ 300GHz).
Kev sib raug zoo ntawm wavelength thiab zaus (c=λf, qhov twg c yog qhov ceev ntawm lub teeb) yog raws li nram no:
26G radar qib ntsuas:
Modulation zaus feem ntau yog nyob nruab nrab ntawm 24 thiab 26 GHz, wavelength yog kwv yees li 11.5 mm, teej tug mus rau centimeter yoj band.
80G radar qib ntsuas:
Modulation zaus feem ntau yog nyob nruab nrab ntawm 78 thiab 82 GHz, wavelength yog kwv yees li 3.75 mm, teej tug mus rau millimeter yoj band.
Kev ntsuas qhov tseeb thiab kev daws teeb meem
Feem ntau, qhov siab dua qhov zaus (qhov luv dua lub wavelength) ntawm radar, qhov siab dua nws qhov kev daws teeb meem.
26G Radar Qib ntsuas:
Qhov no belongs rau pulse radar (PTOF). Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm pulse radar zoo ib yam li "sonar detection": lub tshuab xa tawm ib ntus emits siab - zaus pulse signals nrog lub sijhawm luv luv (feem ntau nyob rau theem nanosecond). Tom qab cov mem tes nce mus txog qhov nruab nrab ntawm qhov nruab nrab thiab pom, chav txais ntawv sau lub sijhawm sib txawv (Δt) ntawm kev sib kis thiab kev txais tos, thiab tom qab ntawd suav cov kua theem siv cov qauv "nruab nrab=(ceev ntawm lub teeb × Δt) / 2". Nws cov qauv tsim hluav taws xob yog qhov yooj yim thiab tus nqi qis, tab sis nws raug txwv los ntawm qhov dav ntawm lub mem tes, muaj qhov muag tsis pom ntawm thaj tsam ze (feem ntau 0.3-1m), thiab muaj kev daws teeb meem tsawg (feem ntau ± 5mm). Nws yog qhov tsim nyog rau cov xwm txheej uas muaj qhov ntsuas dav dav thiab qhov yuav tsum tau muaj qhov tseeb tsawg.
80G Radar Qib ntsuas:
Qhov no belongs rau zaus-modulated nruam yoj radar (FMCW). Nws xa cov teeb liab nthwv dej tsis tu ncua nrog ntau zaus uas hloov pauv raws sijhawm, thiab kev sib kis zaus muaj sawtooth lossis daim duab peb sab yoj kev sib raug zoo nrog lub sijhawm. Thaum lub ncha teeb liab tau txais, qhov sib kis zaus tau hloov. Cov qib kua yog xam los ntawm kev ntsuas qhov sib txawv ntawm qhov sib txawv (Δf) ntawm qhov sib kis thiab nthwv dej nthwv dej, siv cov cuab yeej uas "Δf yog proportional to nrug." Vim tias nws siv cov cim nthwv dej tsis tu ncua, FMCW radar muaj thaj tsam me me qhov muag tsis pom, qhov kev daws teeb meem ntawm ± 1mm, thiab muaj zog tiv thaiv - muaj peev xwm cuam tshuam, muaj txiaj ntsig zoo qhov txawv ntawm lub suab ntawm cov kua dej thiab cov teeb meem nyob ze. Txawm li cas los xij, nws lub voj voog yog qhov nyuaj thiab nws cov nqi kuj tseem siab, ua rau nws haum rau siab -precision lossis luv- qhov ntsuas qhov ntsuas.
Beam Angle
Ib qho txiaj ntsig tseem ceeb ntawm qhov siab - zaus microwaves yog lawv lub kaum sab xis me me heev . 80GHz radar feem ntau muaj lub kaum sab xis ntawm 3℃-5 degree, thaum 26GHz radar nce mus txog 10℃-15℃. Hauv cov chaw kaw lossis cov xwm txheej nyuaj nrog cov teeb meem, 80GHz radar tuaj yeem ua kom pom tseeb ntawm cov kua dej, txo kev cuam tshuam los ntawm cov thawv ntim phab ntsa lossis lwm cov qauv sab hauv. Cov yam ntxwv no ua rau nws ua tau zoo tshwj xeeb hauv cov tso tsheb hlau luam me me lossis thaum ntsia ze rau ntawm phab ntsa tank.
Antenna Hom
80GHz radar feem ntau siv lub kav hlau txais xov matrix planar. Muab piv rau lub horn- zoo li tus kav hlau txais xov feem ntau siv hauv 26GHz radar, nws muaj zog tiv thaiv kev cuam tshuam xws li plua plav, chav, thiab condensation, thiab tuaj yeem ua haujlwm ruaj khov txawm tias nyob hauv qhov hnyav. Piv txwv li, nyob rau hauv agitated tej yam kev mob, eddies, ua npuas ncauj, splashing, thiab txawm tsis muaj tseeb interfaces yuav tshwm sim nyob rau hauv cov kua nto, tso siab heev xav tau ntawm lub anti- cuam tshuam muaj peev xwm thiab teeb liab tsom ntawm cov cuab yeej ntsuas . 80GHz siab- zaus radar, nrog nws luv luv wavelength, nqaim teeb liab, thiab cov txheej txheem tseem ceeb ntawm cov teeb liab muaj zog, thiab cov teeb liab muaj zog heev. kev daws teeb meem rau kev ntsuas cov kua hauv cov tank agitated.
Yuav Ua Li Cas Xaiv Ntawm 80GHz thiab 26GHz?
Cov xwm txheej uas 80GHz radar qib ntsuas yog nyiam:
Cov txheej txheem nyuaj: Lub tank muaj cov khoom thaiv xws li agitators, cua sov coils, thiab ntaiv.
Miniaturized ntim: Reactors, me me cia tso tsheb hlau luam, txheej txheem cov hlab ntsha (inch tsawg dua 1 meter).
Cov yam ntxwv ntawm cov xov xwm nyuaj: Cov kua / cov khoom uas nquag ua rau foaming, evaporation ua rau condensation, los yog tsis tshua muaj dielectric.
Siab -kev ntsuas qhov tseeb yuav tsum tau: Siv rau kev lag luam kev sib hais haum, kev ua haujlwm zoo, thiab lwm yam.
Txwv tsis pub muaj kev teeb tsa: Tsis txaus cov yeeb nkab ntev ntev, lossis tsis kam / tsis tuaj yeem nruab waveguides.
Cov khoom siv ntsuas, tshwj xeeb tshaj yog tsis tshua muaj dielectric tas li hais thiab hmoov.
Cov xwm txheej uas 26GHz radar qib ntsuas yog nyiam:
Standard loj cia tso tsheb hlau luam: xws li reservoirs, crude roj cia tso tsheb hlau luam, dej phwj pas dej ua ke, thiab lwm yam., nrog yooj yim sab hauv cov qauv.
Kev siv nyiaj tsawg thiab kev ua haujlwm yooj yim yam tsis muaj kev sib tw tshwj xeeb.
Ntsuas cov kua dej (dej, roj, acids, alkalis, thiab lwm yam) thiab slurries nrog siab dielectric tas li.
Cov ntsiab lus
Feem ntau, 80GHz radar qib gauges, nrog rau lawv lub peev xwm ua kom pom tseeb zoo dua thiab tiv thaiv - cuam tshuam kev ua haujlwm, tau dhau los ua qhov kev xaiv zoo tshaj plaws rau ntau daim ntawv thov, tshwj xeeb tshaj yog hauv cov txheej txheem kev lag luam thiab kev ua haujlwm nyuaj. Lawv txo tag nrho cov nqi ntawm lub neej los ntawm kev teeb tsa ntse dua thiab kev ntsuas ruaj khov dua. Lub caij no, 26GHz radar qib gauges, raws li cov cuab yeej paub tab thiab txhim khu kev qha, tseem muaj peev xwm ua tau zoo nyob rau hauv ntau cov qauv thiab kev ntsuas qib yooj yim vim lawv cov txiaj ntsig kev lag luam.
Radar qib gauges tsis tas yuav zoo dua qhov siab dua qhov zaus, thiab lawv tsis tas yuav ua rau qis dua qhov zaus. Thaum xaiv, yam xws li qhov nyuaj ntawm kev ua haujlwm, qhov yuav tsum tau muaj tseeb, kev teeb tsa kev teeb tsa, cov yam ntxwv ntawm kev tshaj tawm, thiab cov phiaj xwm peev nyiaj yuav tsum raug txiav txim siab. Qhov kev xaiv tsim nyog tshaj plaws yog qhov tsim nyog rau koj qhov kev ua haujlwm.
