Cov Kev Siv Twg Lawm Yog Dab Tsi?

Ultrasonic siv tau dav siv hauv kev xyaum, feem ntau ntawm cov hauv qab no:

Gamma xeem

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 siv rau kev ntsuam xyuas ntawm cov teev loj hauv kev loj hlob, yog siv los rau kev pom kev sib txawv ntawm cov khoom sib txawv hauv cov cheeb tsam science thiab ciam thaj, 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 .

Txhuas ultrasonic kho

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.

Tshawb nrhiav kev tshawb fawb

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 khoom hauv lub xeev, nrog rau txoj kev tshawb fawb hauv lub suab tshwm sim nyob rau hauv quantum kua - kua helium, zoo ib thaj chaw tshiab ntawm acoustics.

Cov suab tsis yog ib qho ntawm cov suab nrov thiab muaj rau cov neeg tsav tsheb tsis. Lub suab tsis hais txog ib hom longitudinal yoj uas muaj peev xwm tau hnov los ntawm tib neeg lub pob ntseg. Qhov ntau zaus yog 16hz-20khz. Thaum lub sij hawm ntawm lub suab yoj suab qis tshaj 20Hz, nws yog hu ua subsonic yoj, thiab thaum twg tus zaus ntau dua 20KHz, nws yog hu ua ultrasonic yoj.

Ultrasonic muaj cov yam ntxwv nram qab no:

1) tsis muaj ultrasonic tsis muaj peev xwm kis tau zoo nyob rau hauv cov roj cua, kua, cov khib nyiab, cov khoom tawv nqaij thiab lwm yam tawm.

2) ultrasonic tsis yuav kis tau lub zog muaj zog.

3) ultrasonic nthwv dej yuav tsim kom muaj kev cuam tshuam, cuam, superposition thiab resonance.

4) thaum ultrasonic yoj propagates nyob rau hauv nruab nrab cov kua, nws yuav ua kom muaj zog feem thiab cavitation ntawm lub interface.

Ultrasound yog ib tug tswv cuab ntawm tsev neeg sonic. Lub suab tsis yog cov kis ntawm cov neeg kho tshuab (lossis lub zog). Kev co yog hais txog kev xa rov qab los ntawm ib qho khoom siv qhov ze ntawm nws qhov chaw nruab nrab. Piv txwv, thaum ib lub nruas ntaus, nws vibrates nce thiab nqis. Lub xeev no vibrational kis tau zoo nyob rau hauv tag nrho cov lus qhia los ntawm cov cua nruab nrab.

Ultrasonic yoj yog hais txog kev sib cav ntawm ntau tshaj 20KHz, neeg nyob hauv qhov chaw ib puag ncig tsis hnov thiab hnov lub suab tsis.

Lub tswvyim ntawm kev kho ultrasound:

Ultrasound kev kho yog ib feem tseem ceeb ntawm cov tshuaj ultrasound. Hauv kev kho ultrasonic, ultrasonic lub zog yog siv rau lub cev ntawm cov tib neeg lub cev los kho cov kab mob thiab txhawb txoj kev rov zoo los ntawm lub cev.

Nyob hauv lub ntiaj teb, ultrasound yog dav siv hauv kev kuaj mob, kev kho mob, engineering, biology thiab lwm yam hauj lwm. Ultrasonic kho tshuab siv hauv tsev ntawm severus belongs rau daim ntawv thov ntawm ultrasonic therapy.

(1) daim ntawv thov hauv engineering: kev tso dej nyob hauv dej thiab kev sib txuas lus, kev tshawb xyuas underground, thiab lwm yam.

(2) cov kev siv hauv biology: txiav cov tshuaj macromolecules, kev kho kom haum xeeb thiab cov noob.

(3) kev tshuaj ntsuam xyuas: hom A, hom B, hom M, hom D, ua ob txoj haujlwm, xim doppler, thiab lwm yam.

Ntawv thov kev kho mob: physiotherapy, kev kho mob cancer, kev phais mob, tshuaj tua kab mob qoob lithotripsy, kev kho hniav, thiab lwm yam.