Electromagnetic compatibility EMC yog hais txog lub peev xwm ntawm lub cuab yeej lossis lub kaw lus kom ua tau raws li qhov yuav tsum tau ua hauv nws qhov chaw electromagnetic thiab tsis tsim kev cuam tshuam tsis zoo ntawm electromagnetic cuam tshuam rau txhua yam khoom hauv nws ib puag ncig. Cov nram qab no yog kaum lo lus nug thiab kaum cov lus teb rau cov khoom siv electromagnetic compatibility.
1. Thaum kuaj xyuas cov teeb meem ntawm electromagnetic cuam tshuam nyob rau hauv lub tshav pob, nws yog ib qho tsim nyog yuav tsum tau siv cov kev sojntsuam ze ze thiab lub spectrum analyzer. Yuav ua li cas ua ib qho yooj yim nyob ze-tsav sojntsuam nrog ib tug coaxial cable?
Teb: Tshem tawm txheej txheej (shielding txheej) ntawm coaxial cable kom nthuav tawm cov tub ntxhais hlau. Cua cov tub ntxhais hlau rau hauv ib lub voj me me (1 ~ 3 lem) nrog txoj kab uas hla ntawm 1 ~ 2 cm, thiab txuas mus rau txheej txheej.
2. Kev ntsuas cov ntaub ntawv biomagnetism ntawm tib neeg lub cev yog txoj kev kuaj mob tshiab. Qhov kev ntsuas biomagnetism no yuav tsum tau ua nyob rau hauv ib chav sib nqus tiv thaiv. Chav tsev shielded no yuav tsum muaj peev xwm tiv thaiv qhov sib txawv electromagnetic teb los ntawm static magnetic teb mus rau 1GHz. Thov qhia qhov Design scheme ntawm shielded room.
Teb: Ua ntej, xav txog kev xaiv cov ntaub thaiv npog. Txij li thaum sib nqus teb nrog tsawg zaus yuav tsum tau shielded, cov ntaub ntawv nrog siab sib nqus permeability, xws li Permalloy, yuav tsum tau siv. Txij li thaum lub permeability ntawm permalloy yuav txo qis tom qab ua, nws yuav tsum tau kho cua sov. Yog li ntawd, lub shielding chav yuav tsum tau ua raws li ib tug assembling hom, uas yog assembled los ntawm daim hlau. Cov phaj yog ua tiav ua ntej raws li tus qauv tsim, thiab tom qab ntawd kho cua sov, thauj mus rau qhov chaw, thiab ua tib zoo ntsia. Cov pob qij txha ntawm txhua lub phaj yuav tsum sib tshooj los ua ib txoj kev sib nqus txuas ntxiv. Lub shielding chav tsev nyob rau hauv no txoj kev yuav muaj zoo dua shielding zoo tiv thaiv tsawg zaus magnetic teb, tab sis qhov sib txawv yuav ua rau high-frequency to. Txhawm rau tsim kom muaj qhov tsis txaus no, txheej txheej sab nraud ntawm chav tsev permalloy shielding yog welded nrog txhuas daim hlau los ua ib txheej thib ob ntawm kev tiv thaiv los tiv thaiv high-frequency electromagnetic teb.
3. Vim li cas thiaj tuaj yeem't lub spectrum analyzer saib kev cuam tshuam ib ntus xws li electrostatic paug?
Teb: Vim hais tias cov spectrum analyzer yog ib qho nqaim-band cheb zaus txais, nws tsuas yog tau txais lub zog hauv qee qhov ntau zaus ntawm ib lub sijhawm. Transient cuam tshuam xws li electrostatic tawm yog ib yam ntawm impulse cuam tshuam. Nws spectrum ntau yam yog dav heev, tab sis lub sij hawm luv heev. Nyob rau hauv txoj kev no, thaum lub sijhawm cuam tshuam tshwm sim, tus spectrum analyzer tsuas pom ib feem me me ntawm nws lub zog tag nrho, uas tsis tuaj yeem cuam tshuam qhov xwm txheej tiag tiag. Qhov xwm txheej cuam tshuam.
4. Thaum tsim cov ntaub thaiv npog, dab tsi yuav tsum tau siv los xaiv cov ntaub thaiv npog?
Teb: Los ntawm qhov kev xav ntawm electromagnetic shielding, hom hluav taws xob teb yoj yuav tsum tau shielded yog feem ntau xav txog. Rau cov hluav taws xob tsis muaj hluav taws xob, lub dav hlau tsis muaj zog lossis siab dua cov hlau nplaum sib nqus, feem ntau cov hlau tuaj yeem ua tau raws li qhov yuav tsum tau ua. Rau qhov tsawg zaus magnetic teb tsis, cov ntaub ntawv uas muaj magnetic permeability ntau dua yuav tsum tau siv.
5. Nyob rau hauv lub teb ntawm electromagnetic compatibility (EMC), yog vim li cas nws yeej ib txwm piav nyob rau hauv decibels (dB)?
Teb: Vim hais tias qhov ntau ntawm amplitude thiab zaus yuav tsum tau piav qhia yog qhov dav heev, nws yooj yim dua los nthuav tawm ntawm daim duab nrog logarithmic coordinates, thiab dB yog chav tsev thaum qhia hauv logarithm.
6. Ntxiv nrog rau cov khoom siv tiv thaiv, kev tiv thaiv kev ua haujlwm ntawm lub chassis cuam tshuam los ntawm lwm yam?
Teb: Muaj kev cuam tshuam los ntawm ob yam, ib qho yog qhov cuam tshuam ntawm kev sib txuas ntawm lub chassis, xws li qhov, qhov khoob, thiab lwm yam; lwm qhov yog cov xov hlau hla dhau ntawm lub thawv thaiv, xws li cov teeb liab cables, cov kab hluav taws xob, thiab lwm yam.
7. Los ntawm qhov twg tuaj yeem tsim EMC cov khoom lag luam?
Teb: Circuit Court tsim (nrog rau kev xaiv cov cuab yeej), software tsim, Circuit Court board tsim, shielding qauv, teeb liab kab / hwj chim kab filtering, Circuit Court grounding tsim.
8. Cov teeb meem dab tsi yuav tsum tau them rau thaum tiv thaiv cov hlau nplaum hluav taws xob?
Teb: Txij li thaum yoj impedance ntawm magnetic teb nthwv dej yog tsawg heev, qhov kev xav poob qis heev, thiab lub hom phiaj tiv thaiv yog ua tiav los ntawm kev nqus qhov poob. Yog li ntawd, yuav tsum xaiv cov khoom siv tiv thaiv uas muaj qhov sib nqus permeability ntau dua. Tsis tas li ntawd, thaum tsim cov qauv, khaws cov txheej tiv thaiv kom deb li deb tau los ntawm qhov chaw hluav taws xob (kom ua kom qhov kev xav tsis zoo), thiab sim kom tsis txhob muaj qhov thiab qhov khoob ze ntawm qhov chaw hluav taws xob.
9. Thaum tsim cov qauv kev tiv thaiv, muaj lub hauv paus ntsiab lus: sim ua kom cov cables nyob rau hauv rooj plaub kom deb ntawm qhov khoob thiab qhov. Vim li cas?
Teb: Txij li thaum ib txwm muaj ib qho chaw sib nqus nyob ze ntawm lub cable, cov hlau nplaum tuaj yeem yooj yim los ntawm lub qhov (nws tsis muaj dab tsi cuam tshuam nrog qhov zaus ntawm cov hlau nplaum). Yog li ntawd, thaum lub cable nyob ze heev rau lub qhov khoob thiab qhov, qhov sib nqus hlau nqus yuav tshwm sim, txo qhov kev tiv thaiv tag nrho.
10. Vim li cas electromagnetic compatibility thiab EMC tsim rau cov khoom?
Teb: Ua tau raws li qhov yuav tsum tau ua ntawm cov khoom, txo lub sijhawm debugging, ua kom cov khoom ua tau raws li qhov yuav tsum tau ua ntawm electromagnetic compatibility EMC tus qauv, kom cov khoom yuav tsis ua rau electromagnetic cuam tshuam rau lwm yam khoom siv hauv lub cev.
