Ow siv ib tug multimeter los ntsuas inductance
Yuav ua li cas ntsuas inductance nrog digital multimeter
Lub ntsiab inductive yog ib co coil tsim los ntawm winding ib tug enameled hlau nyob rau hauv ib tug sib nqus daim ntawv (los yog ib tug sib nqus nplhaib), thiab ces ib tug ntaus ntawv tsim los ntawm nto encapsulation.
Nyob rau hauv kev saib xyuas ntawm phau ntawv computer motherboards, txoj kev "on-the-road test" feem ntau yog siv los txiav txim qhov zoo ntawm inductive Cheebtsam.
Kev kuaj xyuas txoj kev:
Kauj Ruam 1: Txheeb xyuas qhov kev xaiv ntawm iav
Txij li thaum DC impedance ntawm tooj liab hlau ntawm inductor coil yog me me, nws yog qhov yooj yim ze rau ncaj-dhau. Yog li ntawd, thaum kuaj cov khoom inductive nrog lub digital multimeter, raws li cov yam ntxwv no, xaiv cov iav qis tshaj plaws ntawm kev tiv thaiv, thiab txiav txim siab seb nws puas zoo los yog phem los ntawm kev ntsuas nws txoj kev qhib / tawm.
Tig lub digital multimeter mus rau lub iav cim nrog lub cim "n", thiab xaiv cov iav ntau yam ntawm "diode nrog buzzer".
Kauj Ruam 2: Kev Tshawb Nrhiav Kev Ua Haujlwm
Nyob rau hauv lub xeev "passive" tom qab lub mainboard ntawm lub computer phau ntawv yog powered tawm, siv ob lub xeem cwjmem ntawm lub digital multimeter hu rau lub solder pob qij txha nyob rau hauv ob qho tib si kawg ntawm lub inductive ntsiab. Txij li cov ntsiab lus inductive tsis muaj cov ntsiab lus zoo thiab tsis zoo, cov cwj mem xeem tsis tau muab faib ua qhov zoo thiab tsis zoo. Thaum lub sijhawm ua haujlwm ntawm cov kauj ruam no, lub sijhawm rau kev sim ua rau kev sib cuag cov pob qij txha ntawm ob qhov kawg ntawm cov khoom siv inductive yuav tsum tsis txhob luv luv, txwv tsis pub nws yog ib qho yooj yim ua rau kev txiav txim siab tsis zoo.
Kauj Ruam 3: Saib xyuas cov txiaj ntsig kev xeem kom txiav txim siab
Yog tias qhov kev nyeem ntawv tso tawm ntawm LCD yog qhov ruaj khov "{{0}}" lossis ze rau "0", thiab lub buzzer tseem nrov thaum lub sijhawm kuaj, cov khoom siv ntsuas inductive yog qhov zoo; Yog hais tias qhov kev nyeem ntawv qhia tau hais tias tus overflow cim "1" (ie "∞"), nws txhais tau hais tias lub inductive keeb tau tawg thiab puas lawm; yog tias tus lej tso tawm ntawm lub vijtsam LCD flickers thaum lub sijhawm kuaj; lub buzzer tsis suab thaum nws rings, feem ntau nws yog lub solder sib koom ua ke ntawm cov khoom Yog hais tias muaj ib tug tshwm sim ntawm virtual vuam los yog de-soldering, nws yuav tsum tau kho thiab ces sim.
Peb qhov xwm txheej saum toj no feem ntau tshwm sim hauv kev kuaj xyuas, thiab muaj ob qhov xwm txheej tshwj xeeb ntxiv uas yuav tsum tau piav qhia tshwj xeeb, xws li F:
Ua ntej, yog tias kev nyeem ntawv ntawm lub ntsuas hluav taws xob loj dhau mus txog 10n lossis ntau dua 10Ω, txawm tias lub suab nrov ib txwm muaj, nws tsis tuaj yeem txiav txim siab tias qhov ntsuas inductive yog qhov zoo.
Vim tias qhov impedance ntawm tag nrho cov inductive Cheebtsam nyob rau hauv phau ntawv computer motherboard tsis tuaj yeem ncav cuag 10Ω: lub tiaj tus lub zog cia inductors, transformers, thiab lwm yam. siv nyob rau hauv lub hwj chim Circuit Court nrog loj zog noj thiab loj tam sim no, tooj liab hlau ntawm winding yog thicker, thiab lub impedance qis heev; me me nti inductors siv nyob rau hauv lub hwj chim circuits los yog lub teeb liab circuits nrog tsawg zog noj thiab tsis tshua muaj tam sim no, txawm hais tias cov tooj liab hlau ntawm winding yog nyias, tab sis tus naj npawb ntawm lem yog me me, qhov ntev yog luv, thiab impedance kuj yog tsawg.
Yog li, qhov kuaj pom kev nyeem ntawv txog 10Ω lossis ntau dua tsis yog tus nqi impedance ib txwm ntawm cov khoom siv inductive. Tej zaum nws yuav yog qhov ntsuas inductance tau tawg, thiab kev nyeem ntawv yog tus nqi impedance ntawm lwm cov khoom sib txuas; nws kuj yuav yog qhov ntsuas inductance tau raug hlawv thiab tawg, thiab kev nyeem ntawv yog qhov tig Qhov kev tiv thaiv tus nqi tsim los ntawm luv Circuit Court ntawm lawv.
Qhov thib ob, yog tias thaum lub sijhawm kuaj pom, lub buzzer nres sai sai tom qab tus cwj mem ntsuas kov cov pob qij txha ntawm ob qho kawg ntawm inductor rau lub sijhawm luv luv, uas feem ntau tshwm sim hauv lub zog hluav taws xob nrog cov dej loj. Qhov tshwm sim no tshwm sim tsis tau tsuas yog vim hais tias lub ntsiab inductance tau tawg, tab sis kuj qhia tau hais tias muaj ib tug loj luv luv Circuit Court (grounding) tshwm sim nyob rau hauv lub Circuit Court ntawm ib kawg ntawm lub inductance. Lub suab luv luv ntawm lub buzzer yog tshwm sim los ntawm qhov hluav taws xob thoob plaws qhov kev sim ua kom them lub peev xwm loj ntawm electrolytic capacitor hauv Circuit Court tam sim ntawd. ntawm.
Yog li ntawd, thaum kuaj pom cov khoom inductive, lub sij hawm rau qhov kev xeem ua rau kev sib cuag cov pob qij txha ntawm ob qho kawg ntawm cov khoom inductive tsis tuaj yeem luv luv.
