Dab tsi yog qhov zaus transducer
A zaus transduceryog ib hom khoom siv hluav taws xob uas hloov ib hom ntawm lub zog lossis teeb liab mus rau lwm qhov, tshwj xeeb hauv cov ntsiab lus ntawm zaus. Nws yog ib qho cuab yeej uas ntsuas lossis hloov cov ntaub ntawv zaus ntawm ib daim ntawv mus rau lwm qhov. Lub input zaus tuaj yeem ua raws li cov teeb liab hluav taws xob, cov khoom siv hluav taws xob, lossis lwm hom hluav taws xob, thiab cov khoom siv hluav taws xob tuaj yeem yog cov teeb liab sib txawv, xws li hluav taws xob hluav taws xob, lossis lub tshuab hluav taws xob lossis acoustic vibration.
Muaj ntau hom transducers muaj, nrog rau txhua tus tsim los hloov ntau hom hluav taws xob lossis cov teeb liab. Qee hom muaj xws li inductive transducers, capacitive transducers, piezoelectric transducers, thiab magnetic field sensors. Kev xaiv ntawm transducer nyob ntawm daim ntawv thov thiab qhov ntau ntawm cov zaus uas yuav tsum tau saib xyuas lossis ntsuas.
Qhov tseeb thiab kev ntseeg siab ntawm lub transducer yog qhov tseem ceeb hauv nws qhov kev ua tau zoo. Lub tshuab hluav taws xob zoo siab yuav tsum muaj cov lus teb tawm ntawm ntau qhov ntau zaus thiab kev ua haujlwm, tsis tshua muaj suab nrov, thiab cov zis ruaj khov. Tsis tas li ntawd, nws yuav tsum tau rugged txaus los tiv thaiv ib puag ncig hnyav thiab muaj lub neej ntev.
Lub hom phiaj ntawm high zaus transducer yog dab tsi?
- High zaus transducers yog cov cuab yeej tseem ceeb hauv ntau qhov chaw, suav nrog kev kuaj mob, kuaj tsis muaj kev puas tsuaj, thiab tu ultrasonic. Lub hom phiaj ntawm lub siab zaus transducers yog kom raug kuaj xyuas, ntsuas, thiab xa cov suab nrov zaus thaum lawv mus los ntawm qhov nruab nrab.
- Nyob rau hauv kev kho mob imaging, high zaus transducers yog siv rau kev ntsuam xyuas cov ntaub so ntswg mos thiab cov kabmob uas nyob ze rau ntawm lub cev, xws li daim tawv nqaij, lub mis, thiab thyroid caj pas. Lawv ua haujlwm ntawm cov zaus xws li 5 MHz txog 15 MHz, uas tso cai rau cov duab daws teeb meem nrog cov duab zoo heev. Piv txwv li, kev kuaj ultrasound zaus tuaj yeem muab cov duab ntxaws ntxaws ntawm kev loj hlob ntawm tus menyuam hauv plab thaum cev xeeb tub, kuaj xyuas thiab saib xyuas mob qog noj ntshav, thiab kuaj pom cov ntshav txhaws lossis aneurysms hauv lub cev.
- Kev kuaj tsis yog kev puas tsuaj (NDT) yog lwm qhov chaw uas siv cov tshuab hluav taws xob ntau zaus. NDT yog cov txheej txheem kev sim uas tshuaj xyuas qhov ncaj ncees ntawm cov khoom lossis cov qauv yam tsis muaj kev puas tsuaj. Nyob rau hauv cov ntaub ntawv no, high-frequency suab tsis yog siv los txheeb xyuas qhov tsis xws luag los yog tsis muaj zog ntawm cov khoom. High zaus transducers ua haujlwm nyob rau hauv thaj tsam ntawm 1 MHz txog 15 MHz yog siv rau NDT daim ntawv thov. Lawv emit ultrasonic nthwv dej uas tuaj yeem nkag mus tob rau hauv cov khoom, tso cai rau kev tshawb pom ntawm cov teeb meem sab hauv uas yuav tsis pom ntawm qhov chaw.
- Ultrasonic tu yog lwm daim ntawv thov ntawm high zaus transducers. Lawv yog siv los tshem tawm cov av, roj, thiab lwm yam kab mob los ntawm ntau qhov chaw, nrog rau cov khoom hlau, cov hniav nyiaj hniav kub, thiab cov cuab yeej kho mob. Nyob rau hauv daim ntawv thov no, lub suab nrov zaus tsim cov npuas hauv microscopic hauv cov tshuaj ntxuav uas implode, tso lub zog uas loosens av thiab lwm yam khoom los ntawm qhov chaw raug ntxuav. Feem ntau siv nyob rau hauv ultrasonic tu ntau ntawm 20 kHz mus rau 100 kHz, nyob ntawm seb qhov loj thiab hom ntawm cov khoom raug ntxuav.
- Kev tsim thiab kev tsim kho ntawm high zaus transducers tuaj yeem sib txawv heev nyob ntawm daim ntawv thov. Feem ntau, lub siab zaus transducer muaj cov khoom siv piezoelectric, uas ua rau lub suab tsis muaj zog thaum siv hluav taws xob tam sim no. Cov khoom siv piezoelectric feem ntau yog tsim los ntawm cov ntaub ntawv xws li lead zirconate titanate (PZT) lossis lithium niobate (LiNbO3), uas muaj cov dielectric siab thiab tuaj yeem tsim kev vibrations muaj zog thiab ruaj khov ntawm cov khoom siv siab.
Dab tsi yog qhov zaus ntawm lub transducer nyob ntawm
- Ib qho ntawm thawj yam uas txiav txim siab qhov zaus ntawm lub transducer yog lub cev tsim thiab qhov loj ntawm lub transducer nws tus kheej. Qhov zaus ntawm lub transducer yog inversely proportional rau nws qhov loj me, txhais tau hais tias cov transducers me tuaj yeem tsim cov zaus ntau dua, thaum cov transducers loj dua tsim cov zaus qis dua. Qhov no yog vim hais tias ntau zaus yuav tsum tau ntau dua oscillations ceev ntawm lub transducer cov ntsiab lus, uas yuav tsum tau ntau dua kev ncua deb mus rau lub sij hawm. Yog li, cov khoom me me tuaj yeem tsim cov zaus ntau dua vim tias lawv cov kev txav mus los ntawm qhov luv luv.
- Cov khoom ntawm qhov nruab nrab los ntawm cov teeb liab kis tau los kuj cuam tshuam rau qhov zaus ntawm transducer. Ib qho ntawm cov khoom tseem ceeb tshaj plaws yog qhov ceev ntawm lub suab hauv nruab nrab. Lub zaus ntawm lub transducer yog ncaj qha proportional rau qhov ceev ntawm lub suab, txhais tau hais tias lub suab tsis ceev yuav tsim ntau zaus. Qhov no yog vim lub nthwv dej yog compressed rau hauv lub sij hawm luv luv raws li nws propagates los ntawm nruab nrab, ua rau ntau cycles ib ob. Tsis tas li ntawd, acoustic attenuation ntawm qhov nruab nrab kuj tuaj yeem cuam tshuam qhov zaus ntawm cov transducer, vim qee zaus yuav raug nqus los yog attenuated sai dua li lwm tus.
- Lwm qhov cuam tshuam rau qhov zaus ntawm lub transducer yog daim ntawv thov uas nws tau npaj. Cov ntawv thov sib txawv yuav tsum muaj ntau zaus sib txawv nyob ntawm seb qhov xav tau qib ntawm kev nthuav dav thiab qhov tseeb. Piv txwv li, qis zaus ultrasound tsis yog siv rau cov ntaub so ntswg sib sib zog nqus, vim lawv tuaj yeem nkag mus tob rau hauv lub cev, qhov ntau zaus nthwv dej yog siv rau cov duab kos duab ze rau ntawm daim tawv nqaij vim lawv muab cov duab ntxaws ntxiv.
- Thaum kawg, hom transducer kuj ua lub luag haujlwm hauv kev txiav txim siab nws qhov ntau zaus. Muaj ntau hom kev hloov pauv, suav nrog piezoelectric, capacitive, thiab kev xaiv sib nqus, txhua tus muaj lub cev tshwj xeeb uas cuam tshuam rau lawv qhov kev ua tau zoo. Piv txwv li, piezoelectric transducers feem ntau yog siv los tsim cov suab nrov zaus, vim tias lawv muaj qhov hloov pauv siab ntawm elasticity, uas ua rau muaj ntau tus nqi tsim khoom thaum raug kev nyuaj siab.
Peb cov khoom yog thawj-chav kawm thiab kuaj, yog tias koj txaus siab rau peb lub tuam txhab, thov hu rau peb:guoshenglaser.com