Fluke low-power digital multimeter internal circuit disassembly
Multimeters, tseem hu ua multiplex meters, multimeters, triple meters, multimeters, thiab lwm yam, yog indispensable ntsuas ntsuas nyob rau hauv lub hwj chim electronics thiab lwm yam departments. Feem ntau, lub hom phiaj tseem ceeb yog ntsuas qhov voltage, tam sim no thiab tsis kam. Multimeters muab faib ua pointer multimeters thiab digital multimeters raws li hom zaub. Nws yog ib tug multi-function thiab ntau yam ntsuas ntsuas. Feem ntau, multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam thiab suab qib, thiab lwm yam, thiab qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance thiab semiconductor. Qee qhov parameter (xws li) thiab lwm yam.
Cov tsos ntawm multimeter:
Kev ua haujlwm ntawm kev ntsuas hluav taws xob, tam sim no thiab tsis kam ntawm multimeter yog pom los ntawm kev hloov pauv hauv Circuit Court, thiab kev ntsuas tam sim no thiab kev tiv thaiv yog nyob ntawm qhov ntsuas ntawm qhov ntsuas hluav taws xob, uas yog hais, digital multimeter txuas ntxiv raws li lub hauv paus. digital DC voltmeter.
Disassembly ntawm lub multimeter
Internal qauv ntawm multimeter
Me me hloov fais fab mov transformers, siv lead ua oscillators, thiab kev tswj chips rau hloov cov khoom siv fais fab
Fluke tus kheej chips
Digital multimeter siv ntau yam oscillation, amplification, zaus division tiv thaiv thiab lwm yam circuits, yog li nws muaj ntau yam haujlwm. Piv txwv li, nws tuaj yeem ntsuas qhov kub thiab txias, zaus (hauv qhov qis), capacitance, inductance, ua lub teeb liab generator thiab lwm yam.
Lub handheld digital multimeter siv ib-chip A / D converter, thiab lub peripheral Circuit Court yog qhov yooj yim, yuav tsum tau tsuas yog ib tug me me ntawm cov auxiliary chips thiab cov khoom. Nrog rau kev tshwm sim tsis tu ncua ntawm cov chips rau ib leeg-chip digital multimeters, ib qho kev ua tiav tsis siv neeg ntau yam digital multimeter tuaj yeem tsim los ntawm kev siv ib qho IC, tsim kom muaj txiaj ntsig zoo rau kev tsim kom yooj yim thiab txo cov nqi.
Tshiab digital multimeters feem ntau siv CMOS loj-scale integrated circuit A/D converters, thiab lub hwj chim noj ntawm tag nrho cov tshuab yog tsawg heev.
Sau thaum kawg:
Lub hauv paus ntsiab lus ntawm multimeter yog siv lub rhiab magnetoelectric DC ammeter (microammeter) ua lub taub hau. Multimeter Thaum ib qho me me tam sim no dhau los ntawm lub ntsuas, yuav muaj qhov ntsuas tam sim no. Txawm li cas los xij, lub taub hau 'meter' tsis tuaj yeem dhau qhov tam sim no loj, yog li qee qhov kev tiv thaiv yuav tsum tau txuas nrog nyob rau hauv parallel los yog nyob rau hauv series ntawm lub 'meter' lub taub hau rau shunt los yog step-down, thiaj li ntsuas qhov tam sim no, voltage thiab kuj nyob rau hauv lub Circuit Court.
Nyob rau hauv cov txheej txheem ntsuas ntawm cov multimeter, lub converter Circuit Court converts tus nqi ntsuas mus rau hauv ib tug DC voltage teeb liab, thiab lub multimeter converts lub voltage analog nqi mus rau ib tug digital tus nqi los ntawm ib tug analog-to-digital (A / D) converter, thiab ces. suav los ntawm lub txee hluav taws xob, thiab thaum kawg siv qhov ntsuas ntsuas. Cov lej tau qhia ncaj qha rau ntawm cov zaub. Kev ua haujlwm ntawm kev ntsuas hluav taws xob, tam sim no thiab tsis kam ntawm multimeter yog pom los ntawm kev hloov pauv hauv Circuit Court, thiab kev ntsuas tam sim no thiab kev tiv thaiv yog nyob ntawm qhov ntsuas ntawm qhov ntsuas hluav taws xob, uas yog hais, digital multimeter txuas ntxiv raws li lub hauv paus. digital DC voltmeter. Cov digital DC voltmeter A / D converter hloov cov analog voltage uas hloov tsis tu ncua nrog lub sij hawm mus rau hauv ib qho digital, thiab tom qab ntawd suav cov lej digital los ntawm lub txee hluav taws xob kom tau txais cov txiaj ntsig ntsuas, thiab tom qab ntawd cov ntsuas ntsuas ntsuas ntsuas ntsuas ntsuas. Lub logic tswj Circuit Court tswj kev sib koom ua ke ntawm Circuit Court, thiab ua kom tiav tag nrho cov txheej txheem ntsuas hauv ib ntus raws li qhov kev txiav txim ntawm lub moos.
