Yuav ua li cas ntsuas seb puas piezoelectric ceramics puas nrog ib tug multimeter
Lub multimeter muaj peb qhov tseem ceeb: lub taub hau meter, ntsuas Circuit Court thiab hloov pauv hloov. Multimeter yog cov cuab yeej yooj yim tshaj plaws hauv kev ntsuas hluav taws xob thiab tseem yog cov cuab yeej siv dav siv. Multimeters tseem hu ua multimeters, peb lub hom phiaj ntsuas (A, V, Ω, uas yog, tam sim no, voltage, thiab tsis kam), multiplex meters, thiab multimeters. Multimeters muab faib ua pointer multimeters thiab digital multimeters. Kuj tseem muaj kev ua haujlwm oscilloscope. Ib qho oscilloscope multimeter yog ib qho khoom siv ntau yam, ntau qhov ntsuas ntsuas.
Feem ntau, multimeters tuaj yeem ntsuas DC tam sim no, DC voltage, AC voltage, tsis kam thiab suab qib, thiab lwm yam. Qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance, kub thiab qee qhov tsis sib xws ntawm semiconductors (diodes, transistors). Digital multimeters tau dhau los ua qhov tseem ceeb thiab tau hloov cov ntsuas analog. Piv nrog cov cuab yeej analog, cov cuab yeej digital muaj qhov rhiab heev, qhov tseeb siab, pom meej meej, muaj zog tshaj lub peev xwm, yooj yim nqa, thiab yooj yim dua thiab siv yooj yim. Cia tus kws kho hluav taws xob hauv tsev qhia rau koj paub yuav ua li cas siv multimeter los txiav txim seb puas piezoelectric ceramics puas.
Piezoelectric ceramic yog cov khoom siv hluavtaws piezoelectric. Thaum raug rau sab nraud, cov nqi yuav raug tsim tawm ntawm ob sab, thiab tus nqi ntawm cov nqi yog proportional rau lub siab. Qhov tshwm sim no hu ua piezoelectric effect. Piezoelectric ceramics muaj cov nyhuv piezoelectric, uas yog, lawv yuav deform nyob rau hauv qhov kev txiav txim ntawm ib qho hluav taws xob sab nraud, yog li piezoelectric ceramics tuaj yeem siv los ua cov khoom tsim suab.
Siv cov nyhuv piezoelectric ntawm piezoelectric ceramic piece, multimeter tuaj yeem siv los txiav txim nws qhov zoo.
Ua ob lub xov hlau los ntawm ob tug ncej ntawm piezoelectric ceramic piece, ces muab cov ceramic daim tiaj tus rau ntawm lub rooj, txuas ob txoj kev mus rau ob qhov kev xeem coj ntawm multimeter, teem lub multimeter mus rau qhov tsawg kawg nkaus tam sim no thaiv, thiab maj mam nias lub ceramic piece nrog mem hluav eraser. Yog hais tias lub multimeter pointer swings pom tseeb, nws txhais tau hais tias cov ceramic piece yog lawm, txwv tsis pub, nws txhais tau tias nws puas.
