Ib qho khoom tsim ua lub suab thaum nws suab. Cov kws tshawb fawb hu rau tus naj npawb ntawm kev co ib pliag ntawm qhov zaus ntawm lub suab, thiab nws chav nyob yog hertz. Qhov ntau zaus ntawm cov suab nrov uas peb tib neeg lub pob ntseg tuaj yeem hnov yog 20 HZ ～ { 20 000Hz. Yog li no, thaum kev co ntawm ib yam khoom dhau ib qhov zaus, uas yog, siab tshaj qhov tsis pub dhau ntawm tib neeg lub rooj sib hais, tib neeg tsis tuaj yeem hnov nws. Xws li lub suab ntoj suab hu ua" ultrasonic vuag" ;. Zaus ntawm ultrasound feem ntau siv rau kev kuaj mob yog 1 rau 5 MHz.
Txawm hais tias tib neeg tuaj yeem' tsis hnov ultrasound, ntau tus tsiaj muaj qhov peev xwm no. Lawv tuaj yeem siv ultrasound rau" nrhiav" ;, yos hav zoov hauv cov khoom noj, los yog zam cov khoom txaus ntshai. Tej zaum koj yuav tau pom ntau tus menyuam tsiaj ya rov qab thiab tawm mus hauv tshav puam ntawm ib hmos thaum caij ntuj sov. Vim li cas lawv ya tsis muaj teeb thiab tsis disoriented? Qhov laj thawj yog tias cov kab ntses tuaj yeem tshaj tawm ultrasonic tsis sib luag ntawm 20, 000 rau 100, 000 Hz, uas yog zoo li nquag" radar chaw nres tsheb" ;. Bats siv no" radar" los txiav txim siab seb puas muaj kab lossis kev tawm tsam ua ntej lub davhlau.
Peb tib neeg tsis tau kawm paub siv ultrasonic vuag txog thaum tsov rog ntiaj teb thawj. Qhov no yog lub hauv paus ntsiab lus ntawm" sonar" txhawm rau kuaj cov phiaj dej hauv qab thiab lawv cov xwm txheej, xws li chaw nyob hauv nkoj submarines. Lub sijhawm no, cov neeg xa cov khoom siv ntawm ultrasonic tsis sib txawv ntawm cov ntau zaus mus rau hauv dej, thiab tom qab ntawv sau thiab ua cov txheej txheem cuam tshuam nrog ncha. Los ntawm cov yam ntxwv ntawm lub echoes, peb tuaj yeem kwv yees qhov kev ncua deb, duab thiab kev hloov pauv ntawm qhov khoom tau tshawb pom. Kev siv ultrasound thaum ntxov tshaj plaws hauv tshuaj 1942, tus kws kho mob Austrian Dusick tau siv cov thev naus laus zis los kuaj lub hlwb thawj zaug; nyob rau hauv 1960 s, cov kws kho mob pib thov siv ultrasound los nrhiav lub plab zom mov plab. Tam sim no, kev kuaj mob ultrasound tshuab tau dhau los ua qhov cuab yeej tseem ceeb rau kev kuaj mob niaj hnub no.
Tus txheej txheem ua haujlwm ntawm kev kuaj mob ultrasound yog zoo ib yam li ntawm sonar, uas yog, ultrasound raug tawm rau hauv tib neeg lub cev. Thaum nws ntsib qhov interface hauv lub cev, nws yuav muaj kev cuam tshuam thiab thim rov qab, thiab yuav raug yoog thiab kom zoo rau tib neeg cov ntaub so ntswg. Vim tias cov duab thiab cov qauv ntawm ntau cov ntaub so ntswg ntawm tib neeg lub cev tau sib txawv, cov qib ntawm kev rov xav txog thiab rov qab thiab nqus ntawm ultrasonic vuam kuj txawv. Cov kws kho mob pom qhov txawv ntawm cov yam ntxwv ntawm yoj hom, nkhaus, lossis cov duab uas pom los ntawm qhov ntsuas. lawv. Tsis tas li ntawd, ua ke nrog kev paub ntawm lub cev, lub cev ib txwm thiab cov kab mob hloov, nws tuaj yeem kuaj tau seb puas yog khoom hauv nruab nrog kuaj kev mob.
Lub suab nrov nrog ib zaus ntau dua ntawm 20000 Hz (Hertz). Lub ceg ntawm acoustics uas kawm txog tiam, hais tawm, thiab txais tos ntawm ultrasound, nrog rau ntau yam dhau los thiab cov kev siv ultrasound, hu ua ultrasound. Cov tshuab hluav taws xob tshuab hluav taws xob muaj cov tshuab hluav taws xob (ultrasonic lub tshuab ua hluav taws xob) (xws li cua suab, suab xuav thiab lub suab ua pa, thiab lwm yam), hluav taws xob ultrasonic tshuab hluav taws xob tau siv siv lub hauv paus ntsiab lus ntawm electromagnetic induction thiab electromagnetic kev txiav txim, thiab cov nyhuv electrostrictive thiab ferromagnetic siv piezoelectric crystals Electroacoustic transducers ua los ntawm lub zog magnetostrictive ntawm yam.
tshuab ultrasonic welding rau daim npog
