Ultrasonic transducer yam: sib piv ntawm magnetostrictive thiab piezoelectric transducer
Muaj ob yam kev hloov pauv kom tsim tau cov suab nrov uas yuav tsum muaj rau cov txheej txheem: piezoelectric thiab magnetostrictive. Txawm hais tias lawv lub luag haujlwm yog qhov txaus los ua nws qhov chaw hauv kev ua lag luam, txhua hom ultrasonic transducer nws muaj nws tus yam ntxwv, ua rau nws tsim nyog rau qee yam. Txhawm rau muab piv rau lawv, nws yog qhov yuav tsum tau kawm seb lawv ua haujlwm li cas thiab lawv cov yam ntxwv sib txawv.
1. Ua haujlwm cov ntsiab cai
Cov tshuab Piezoelectric siv cov khoom siv siv lead ua nrog cov khoom hluav taws xob tshwj xeeb ua los ntawm cov zirconate titanate. Hauv kev hloov pauv, cov khoom siv no siv lead ua muaj ob lub xov hlau txuas nrog sab ntsej muag. Tom qab ntawd cov siv lead ua thiab xov txuas tau muab sib sau ua ke hauv vaj tse nruab nrab ntawm ob daim hlau hlau. Thaum tam sim no ntws los ntawm cov xov hluav taws xob thiab nkag mus rau hauv kev siv lead ua, cov siv lead ua sai sai hloov cov duab thiab nthuav tawm. Thaum twg qhov tam sim no raug kaw, siv lead ua rov qab mus rau nws lub cev zoo li qub. Lub tshuab ultrasonic transducer siv cov thev naus laus zis sai tam sim no hloov mus rau tam sim no los ntawm cov siv lead ua los ntawm ib pawg zaus, yog li ua kom muaj cov nyhuv cuam tshuam.
Txoj haujlwm ua haujlwm ntawm cov hlau nplaum magnetostrictive ultrasonic transducer yog cov hlau muaj hlau nthuav dav thiab sib cog lus thaum raug lub teb chaw sib nqus. Txhawm rau ua kom zoo dua ntawm tus cwj pwm no, cov hlau nplua nuj hlau cores yog qhwv hauv cov xaim tooj liab. Qhov kev tiv thaiv yog tom qab ntawd ces nyob hauv ib lub taub. Thaum tam sim no dhau ntawm cov tooj liab hlau, cov tub ntxhais hlau nthuav dav thiab ntev. Zoo li lub piezoelectric transducer, tam sim no ntawm ib txheej zaus ua cov nyhuv resonance.
2. Cov chaw ruaj khov
Cov nplaum yog siv los khi cov piezoelectric ultrasonic transducer mus rau cov vaj tse ntawm ultrasonic lub tshuab nqus tsev vacuum. Thaum piezoelectric tshuab tau qhia ua ntej, qhov no tsim teeb meem vim tias cov nplaum yuav tsis muaj zog thiab nws thiaj li poob. Vim tias kev tsim kho thev naus laus zis thev naus laus zis tuaj yeem siv hauv kev lag luam dav hlau, qhov kev txwv no tsis muaj ntxiv lawm. Txawm hais tias siv tas li dhau los, cov nplaum niaj hnub tseem tsis cia cov tshuab txuas txuas nrog.
Cov vaj tse ntawm cov hlau nplaum magnetostrictive transducer yog ncaj qha txais rau lub tank ntawm lub tshuab nqus tsev ultrasonic, muab cov nqi sib zog, tsis zoo.
3. Ultrasonic zaus hloov pauv
Lub xeev zoo tshaj plaws ntawm kev tu ultrasonic yog kev khiav lag luam ntawm ntau zaus ntawm 40kHz-70kHz, tab sis cov txheej txheem tseem tuaj yeem nqa tawm hauv ntau yam ntawm 25kHz-170kHz.
Magnetostrictive ultrasonic transducers tsuas tuaj yeem ua haujlwm ntawm zaus kom txog 30kHz, uas txhais tau hais tias lawv siv tau raug txwv ntau. Hauv qhov no, kev siv qhov zoo tshaj plaws ntawm cov hlau nplaum magnetostrictive transducer ultrasonic tu tshuab yog rau cov tshuab loj uas muaj cov paug uas nyuaj rau tshem tawm. Cov txheej txheem yuav tsum tsis tas yuav tsum tau siv tshuab ntxuav huv. Ib qho piv txwv ntawm daim ntawv thov no tuaj yeem siv rau ntawm kab ntawv electroplating.
Ntawm qhov tod tes, lub piezoelectric ultrasonic transducer tuaj yeem ua haujlwm nyob rau hauv tag nrho ntawm 25kHz txog 170kHz, ua rau nws siv tsis tshua muaj ntau yam.
4. Kev siv hluav taws xob
Magnetostrictive ultrasonic transducers yuav tsum hloov hluav taws xob lub zog rau lub zog sib nqus, thiab tom qab ntawd siv nws los tsim hluav taws xob lub zog. Cov txheej txheem tag nrho yuav ua rau kom muaj ntau lub zog siv sij hawm, uas yog feem ntau tau siv sij hawm los ntawm kev siv hluav taws xob thaum cua sov.
Lub piezoelectric ultrasonic transducer tuaj yeem hloov hluav taws xob tam sim no rau hauv kev siv zog nyob hauv ib kauj ruam, ua kom muaj kev ua haujlwm siab. Yog li no, cov hloov pauv piezoelectric tuaj yeem ua haujlwm ntau dua thaum siv cov nqi hluav taws xob zoo ib yam.
5. xam qhov tsis xws luag ultrasonic transducer qib
Thaum cov kab mob harmonic ntau zaus tau tsim, sub-harmonic zaus yog feem ntau tsim tawm raws li cov khoom ntuj tsim. Kev khiav hauj lwm zaus ntawm feem ntau piezoelectric transducers yog 40kHz lossis siab dua, uas txhais tau tias thawj lub suab raug tsim txom yog 20kHz, uas dhau ntawm cov kab ntawm tib neeg lub rooj sib hais.
Magnetostrictive ultrasonic transducers feem ntau ua haujlwm ntawm ntau zaus ntawm 30kHz lossis qis dua, tsim tawm ntawm cov khoom siv hauv audible sub-harmonic. Cov zaus no tau suab zoo ib yam li qhov tshuab hluav taws xob siab lossis tshuab hluav taws xob hnov ze ze. Thaum ntau qhov magnetostrictive transducers raug teeb tsa nyob rau hauv tib lub tshuab ultrasonic tu, qib suab nrov xav tau kev siv cov khoom tiv thaiv tsis zoo.
6. Xav pom lub neej ntawm ultrasonic transducer
Piezoelectric transducers xub siv quartz muaju, thiab ua haujlwm dhau sijhawm, quartz crystals yuav kawg poob lub zog. Txij thaum ntawd los, cov kws tsim choj tau tsim cov khoom siv hluav taws xob semiconductor uas tuaj yeem ua ntej-dhau los ntawm cov txheej txheem tshwj xeeb, yog li txo tus nqi hnav tom qab sib dhos ntawm cov khoom.
Ua ke nrog cov khoom siv tshiab crystalline, lawv cov kev pab cuam lub neej ntev li ntev dua li ntawm cov khoom sib txuas ntawm cov hlau nplaum, thiab cov tshuab hluav taws xob magnetostrictive hloov tau ib txwm nyiam lub neej ntev.
