Ultrasonic daim ntawv thov tsuas yog cov nram qab no

1. Ultrasonic kuaj. Tsawg dua li lub suab tsis zoo tib yam, lub zog ntawm ultrasound ua kom zoo, tab sis kuj los ntawm cov khoom siv opaque, no feature tau dav siv ultrasonic kuaj, thickness, kev ntsuas nrug, chaw taws teeb tswj thiab kev siv tshuab ntawm ultrasonic. Ultrasonic ntsuam xyuas yog ib qho technology uas USES ultrasound los nthuav cov duab puab ntawm cov khoom siv opaque. Ntawm qhov kev hloov ntawm ultrasonic acoustic tsom rua kev siv tshuaj tua kab mob, lub ultrasonic ntawm tus qauv kis tau yog ib feem ntawm cov ntaub ntawv (xws li lub peev xwm ntawm kev xav, kev nqus thiab tawg ntawm lub suab tsis), acoustic lens converge on piezoelectric receiver, hluav taws xob input input amplifier, siv kev xa tshuaj tuaj yeem tig opaque qauv duab tso tawm ntawm lub vijtsam. Cov cuab yeej hu ua ultrasonic tsom. Ultrasonic kev siv tshuab tau dav dav siv hauv kev kuaj mob, hauv kev tsim ntawm kev siv tshuab hluav taws xob los siv rau kev ntsuam xyuas ntawm cov teev loj hauv kev loj hlob, yog siv rau kev pom kev sib txawv ntawm cov khoom sib txawv hauv cov cheeb tsam science thiab ciam av, thiab lwm yam. Acoustical holography yog ib qho ultrasonic cuam tshuam txoj cai ntawm cov ntaub ntawv thiab cov me nyuam thaij duab ntawm opaque acoustic imaging technology, nws txoj cai thiab kho qhov muag duab yog tib yam, cov ntaub ntawv yog txhais tau txawv (saib daim duab qhia). Nrog tib lub ultrasonic teeb liab qhov kev txhawj xeeb ob transducer muab tso rau hauv ib lub kua, lawv launched ob ntsig txog txoj hlua ntawm ultrasound: ib nqaj los ntawm cov khoom kawm tom qab ua ib nthwv dej, ib pawg ntawm kev yoj. Nthuav nthwv dej thiab kev siv ntim coherent superposition acoustical hologram ua rau ntawm qhov dej, nrog laser beam acoustical hologram, siv lub laser xav txog ntawm lub suab paj nruag acrystical hologram diffraction thiab tau txais tej yam zoo li rov qab, feem ntau nrog rau lub koob yees duab thiab lub TV nyob rau lub sijhawm soj ntsuam .

2. Ultrasonic kho mob. Siv ultrasonic mechanical nkaus, cavitation nyhuv thiab kub nyhuv thiab tshuaj tua hluav taws xob, ultrasonic welding, drilling, cov khoom yuav tawg, emulsification, degassing, plua plav tshem tawm, nplai, tu, kom tsis muaj menyuam, thiab txhawb chemistry thiab biology, etc., nyob rau hauv GongKuangYe , kev ua liaj ua teb, cov chaw kho mob tau txais ntau hom kev siv.

3. Kev tshawb nrhiav. Thaum ultrasonic yoj ACTS ntawm qhov nruab nrab, ua cov txheej txheem ua kom lub cev muaj zog txaus siab rau qhov nruab nrab, acoustic relaxation txheej txheem nrog cov hluav taws xob degrees ntawm feem xyuam rau txoj kev thauj cov txheej txheem molecular, thiab nqus lub suab tsis nyob hauv macro (saib lub suab tsis). Cov yam ntxwv thiab cov qauv ntawm cov tshuaj tuaj yeem raug tshawb los ntawm txoj cai absorption ntawm cov tshuaj mus rau ultrasound, uas yog cov ceg ntawm molecular acoustics. Lub nthwv dej ntawm cov suab tsis zoo tib yam yog ntev tshaj qhov deb ntawm atoms nyob rau hauv cov khoom, nyob rau hauv uas muaj peev xwm yuav suav tias yog ib qho kev nruam nrab. Txawm li cas los xij, rau ultrasonic tsis nrog frequencies saum 1012 hz, lub wavelength yuav muab piv nrog qhov yov ntawm atoms hauv cov khoom. Lub sij hawm no, cov khoom yuav tsum tau ntsuas raws li ib qho kev taw qhia cov qauv matrix nrog lub caij nyoog ncig ua ntu zus. Lub zog ntawm lattice kev co yog quantized thiab hu ua phonon (saib physics solid). Cov teebmeem ntawm ultrasound rau cov khib nyiab tuaj yeem ua tiav raws li kev sib txuas ntawm ultrasound thiab thermophonons, electrons, photons thiab ntau yam quasiparticles. Txoj kev tshawb rau tiam, nrhiav kom tau thiab kev qhia tawm tshwj xeeb ultrasound hauv cov khib nyiab, nrog rau txoj kev tshawb fawb ntawm lub suab phenomenon hauv quantum kua - kua helium, zoo ib yam tshiab ntawm cov acoustics niaj hnub