Feem ntau kev ua txhaum thiab txij nkawm kev txawj ntse ntawm cov digital multimeter
Txog qhov ua yuam kev ua yuam kev, peb yuav tsum ua ntej kos thiab txiav txim seb puas muaj qhov txhaum cai) lossis ib tus neeg ua haujlwm (txhua tus (ib leeg)
1. Yog tias txhua lub zog tsis ua haujlwm, kos lub zog hluav taws xob Circuit Court thiab A / D Converter Circuit Court. Thaum kuaj xyuas lub zog hluav taws xob ib feem, koj tuaj yeem tshem tawm cov roj teeb laminated, nias lub zog hloov chaw, thiab txuas rau cov ntaub ntawv tsis zoo rau lub zog muaj zog (rau cov ntaub ntawv ntau. Yog hais tias DIode ncaj qha rau kev nthuav dav yog tso tawm, nws txhais tau tias lub zog hluav taws xob feem yog qhov zoo; Yog tias qhov sib txawv yog qhov loj, nws txhais tau tias muaj qee yam tsis raug nrog lub zog hluav taws xob. Yog tias muaj kev qhib Circuit Court, tsom rau kev kuaj lub zog hloov thiab roj teeb ua. Yog tias muaj lub luv luv hauv Circuit Court, nws yog qhov tsim nyog los siv Circuit Court kev kom maj mam muab rho tawm cov khoom siv hluav taws xob, tsom mus rau lub zog ua haujlwm, lub sijhawm thiab A / D Converter. Yog tias muaj kev luv nqi tshwm sim, nws feem ntau ua rau kev puas tsuaj ntau dua ib qho sib xyaw ua ke. Khij rau A / D Converter tib lub sijhawm raws li cov meter yooj yim, uas yog sib npaug rau DC 'meter ntawm lub analog multimeter. Cov qauv kev kuaj xyuas tshwj xeeb yog raws li hauv qab no:
(1) Cov ntau ntawm cov me me ntawm kev ntsuas ua raws li qhov qis dua DC voltage;
(2) Ntsuas seb puas yog tus ua haujlwm voltage ntawm A / D Converter yog qhov qub. Raws li tus qauv ntawm A / D Converter siv nyob rau hauv lub rooj, sib xws rau V + tus pin thiab com PIN thiab SHE seb tus nqi ntsuas puas muaj nuj nqis.
(3) Ntsuas cov ntaub ntawv hluav taws xob ntawm A / D Converter. Tam sim no, cov siv hluav taws xob feem ntau siv digital multimeter feem ntau 100 cv, yog, ntsuas lub DC voltage ntawm vref + thiab com. Yog tias nws deviates los ntawm 100mv lossis 1V, nws tuaj yeem hloov kho los ntawm sab nraud Potentiometer.
(4) Txheeb xyuas tus lej tso nrog cov lus qhia tshwj xeeb, thiab cov lus luv luv ntawm A / D Converter ua rau cov lus qhia vin}} {{{{{}}. {8}} ".
(5) Xyuas cov kab mob ci tag nrho ntawm cov zaub. Luv-Circuit Court qhov kev ntsuas tus pin ntawm kev sim lub davhlau ya nyob twg nrog lub zog hluav taws xob kindinal v +, yog li ntawd lub cav hluav taws xob tau muaj peev xwm siab, thiab tag nrho cov kev ua haujlwm digital nres. Vim hais tias DC voltage tau thov rau txhua qhov mob stroke, lub rooj sibtham ntawm txhua cov quav tshuaj qhia "1888" thiab cov lus sib dhos qhia tau "18888". Yog tias muaj qhov tsis muaj tshuaj tua kab mob, tshawb xyuas seb puas muaj kev sib cuag tsis zoo ntawm cov zaub mov tawm ntawm A / D Converter thiab cov nplaum) thiab cov zaub.
2. Yog tias muaj qee yam tsis ncaj ncees lawm nrog cov ntaub ntawv ib leeg, nws txhais tau tias A / D Converter thiab lub zog hluav taws xob ua haujlwm ib txwm ua haujlwm. Vim tias DC voltage thiab cov resistor faib ib txheej ntawm voltage faib cov neeg ua haujlwm; AC / DC Tam sim no sib qhia shunt; Ac voltage thiab ACTs tam sim no faib cov teeb ntawm AC / DC converter; Lwm tus, xws li CX, HFE thiab F, yog muaj kev sib sau ntawm cov kev hloov ywj siab. Nkag siab txog kev sib raug zoo ntawm lawv, thiab tom qab ntawd raws li lub zog kos duab, nws yog qhov yooj yim los nrhiav qhov chaw ua txhaum. Yog tias ntsuas ntsuas me me yog qhov tsis muaj tseeb lossis cov tso tawm digital jitter yog qhov tseem ceeb, nws yog ib qho tseem ceeb los xyuas seb puas yog kev sib cuag ntawm cov hloov pauv yog qhov zoo.
3. Yog tias cov ntaub ntawv ntsuas tsis ruaj khov, thiab tus nqi ib txwm nce cumulively, thiab cov lus qhia xaus, thiab cov ntaub ntawv tso tawm kom txaus, thiab cov lus qhia tawm ntawm qhov kev siv hluav taws xob ntawm {1}}
Raws li kev txheeb xyuas saum toj no, qhov yooj yim kho cov kev sib tw ntawm cov digital motion lub taub hau → cx → hfe zoo → hfe, f, h, thiab nws yuav tsum tsis txhob ua rau txhua yam. Qee qhov teeb meem pom tseeb tuaj yeem ua tau nrog ua ntej. Txawm li cas los xij, cov txheej txheem cov txheej txheem saum toj no yuav tsum tau ua raws thaum ua kev hloov kho.
Hauv ntej, ib qho txhaum yuam kev, tom qab kev soj ntsuam kom raug ntawm qhov ua txhaum, thiab tom qab ntawd nrhiav tau txoj kev txhaum cai raws li kev hloov daim duab rau kev hloov pauv thiab kho. Vim tias cov digital pultiidat yog ib qho kev sib tw zoo tib yam yuav tsum tau siv los hloov cov khoom siv, tsis yog qhov yuav tsis muaj qhov tseeb thiab qhov tseeb yuav tsum tsis ua tiav. Qhov tshiab hloov A / D Converter kuj yuav tsum tau kuaj xyuas raws li txoj kev hais los saud, thiab nws yuav tsum tsis txhob ntseeg vim nws tshiab.
Tam sim no, muaj ntau cov tuam ntxhab ntawm cov neeg tsim muaj cov digital nyob hauv Suav teb, thiab qhov zoo kuj yog qhov zoo thiab tsis zoo. Qhov teeb meem zoo ntawm ob-tog tooj liab clad phaj tsis yooj yim los nrhiav kev kho. Thaum lub rwb thaiv tsev muaj zog ntawm Resin Phaj tsis txaus, nws yog feem ntau yog ua rau muaj kev cuam tshuam loj thaum ntsuas hluav taws xob tsis kam hloov ntawm dividage hluav taws xob thaum kho. Hauv qhov no, nws yog qhov zoo tshaj plaws los siv cov txheej txheem qhib Circuit Court kom pom cov ntsiab lus txhaum. Qhov chaw hlawv thiab cov kab mob carbonized yuav tsum raug ntxuav kom tau raws li cov kev xav tau rwb thaiv tsev. Thaum lub teeb liab tsis tuaj yeem tawm mus rau qhov kev sib tw ntawm qhov kev hloov pauv ntawm ob-ob sab sib txuas, nws yog qhov yooj yim yuav tsum tsis meej pem kev hloov pauv tsis zoo-dhau mus sib cais thiab sib cais. Qhov kev txhaum no yuav tsum pom los ntawm cov qauv luv luv ntawm Circuit Court.
