Yuav Ua Li Cas Piezoelectric Ceramic Cheebtsam Tsim Ultrasonic Wave?
Piezoelectric ceramics yog cov ntaub ntawv tsim nyog rau kev tsim thiab kuaj ultrasonic tsis. Cov neeg nqa khoom thauj mus los ntawm cov khoom siv piezoelectric nyob rau hauv qhov cuam tshuam ntawm lub teb hluav taws xob, ua rau pom qhov hloov pauv ntev (qhov cuam tshuam piezoelectric inverse). Yog tias qhov hluav taws xob siv hluav taws xob yog qhov hloov hluav taws xob, cov khoom hauv nruab nrab (xws li cua) pib vibrate. Kev ntxhov siab tshwm sim. Particle sparseness ua rau txo qis hauv siab, thaum compression ua rau nce siab. Lub suab wavelength piav qhia qhov kev ncua deb ntawm ob thaj chaw sib sib zog nqus lossis compressed. Qhov tshwm sim suab nthwv dej propagate nyob rau hauv ib puag ncig nruab nrab. Qhov ceev ntawm lub suab txawv nyob ntawm seb qhov ceev thiab elastic zog ntawm qhov nruab nrab.
Nws muaj qhov sib txawv ntawm cov kab ntev ntev thiab transverse nthwv dej. Rau longitudinal nthwv dej, oscillations tshwm sim ntawm lub dav hlau ntawm lawv propagation. Lawv tuaj yeem nthuav tawm hauv cov kua thiab roj, nrog rau hauv cov khoom khib nyiab. Txawm li cas los xij, rau cov tsis muaj zog, cov oscillations yog perpendicular rau lawv cov kev taw qhia ntawm kev nthuav tawm, uas tsuas yog ua tau hauv cov khib nyiab. Ob hom nthwv dej tuaj yeem hloov mus rau lwm qhov los ntawm kev xav lossis kev cuam tshuam hauv thaj tsam ciam teb, ua rau cov khoom siv denser.
