Video: Lub transducer ua haujlwm li cas hauv ultrasound?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib ultrasound transducer yog cov khoom siv tes tuav uas tus kws tshaj lij lossis kws kho mob txav mus los lossis hla lub cev ntawm tus neeg mob. Ib txoj hlua txuas nws mus rau lub computer. Cov cuab yeej xa cov suab nthwv dej thiab tau txais cov echoes thaum lawv tawm ntawm lub cev nqaij daim tawv thiab cov kabmob ntawm tus neeg mob.
Xav txog qhov no, lub transducer ua haujlwm li cas?
A transducer tau txais cov kab ke ntawm high voltage hluav taws xob pulses hu ua transmit pulses los ntawm echosounder. Thaum lub suab bounces rov qab, lub transducer ua raws li lub microphone. Nws tau txais lub suab nthwv dej thaum lub sij hawm nruab nrab ntawm txhua qhov kev xa cov mem tes thiab hloov nws rov qab rau hauv hluav taws xob.
Tom qab, lo lus nug yog, dab tsi yog qhov cuam tshuam piezoelectric hauv ultrasound? Cov piezoelectric effect converts kinetic los yog mechanical zog, vim siv lead ua deformation, mus rau hauv hluav taws xob zog. Qhov no yog li cas ultrasound transducers tau txais lub suab nthwv dej. Qhov kev hloov pauv no ua rau siv lead ua lengthening los yog contraction, converting hluav taws xob zog mus rau hauv kinetic los yog mechanical zog.
Tib neeg kuj nug, ua li cas ultrasound imaging ua haujlwm physics?
Cov ultrasound tshuab xa high-frequency (1 mus rau 5 megahertz) suab pulses rau hauv koj lub cev siv ib tug sojntsuam. Lub suab nthwv dej nkag mus rau hauv koj lub cev thiab tsoo ib thaj tsam ntawm cov ntaub so ntswg (piv txwv li ntawm cov kua thiab cov nqaij mos, cov nqaij mos thiab pob txha). Cov nthwv dej reflected yog khaws los ntawm kev sojntsuam thiab xa mus rau lub tshuab.
Dab tsi yog qhov txawv ntawm ultrasound transducers?
Hauv qab no peb teev peb feem ntau Ultrasound transducer hom - linear, convex (tus qauv lossis micro-convex), thiab phased array.
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