Electromagnetic hluav taws xob thiab kev tiv thaiv Electromagnetic hluav taws xob ntsuam xyuas thiab kev tiv thaiv technology
Nrog rau txoj kev loj hlob sai ntawm cov cuab yeej siv niaj hnub no, qhov pom tsis pom thiab tsis pom kev ntawm cov pa phem tau nce ntxiv los ntawm txhua qhov chaw ntawm lub neej, uas yog hu ua "invisible killer" ntawm hluav taws xob hluav taws xob. Niaj hnub no, nrog kev siv cov khoom siv hluav taws xob thiab hluav taws xob ntau ntxiv, cov khoom siv hluav taws xob sib txawv ntawm cov zaus sib txawv thiab lub zog yog dej nyab txhua lub ces kaum ntawm lub ntiaj teb thiab txawm tias dav dav. Rau tib neeg lub cev raws li ib tug zoo conductor, electromagnetic tsis inevitably ua rau ib tug tej yam kev mob ntawm kev puas tsuaj.
Ob peb lub tswv yim ntawm Electromagnetic Radiation
Feem ntau hais lus, cov khoom siv hluav taws xob hluav taws xob muaj xws li radar systems, TV thiab broadcasting systems, xov tooj cua zaus induction thiab nruab nrab cua sov khoom, xov tooj cua zaus thiab microwave cov khoom kho mob, ntau yam khoom siv hluav taws xob, kev sib txuas lus chaw nres tsheb, satellite ntiaj teb kev sib txuas lus chaw nres tsheb, cov chaw tsim hluav taws xob loj. , kis tau tus mob thiab hloov khoom siv, high-voltage thiab ultra-high voltage kis tau tus mob kab, subway tsheb ciav hlau thiab hluav taws xob tsheb ciav hlau, raws li zoo raws li feem ntau ntawm cov khoom siv hauv tsev, uas tuaj yeem tsim ntau hom, zaus, thiab kev siv hluav taws xob hluav taws xob hluav taws xob.
2. Kev faib cov cheeb tsam hluav taws xob hluav taws xob hluav taws xob feem ntau muab faib ua thaj chaw deb thiab thaj chaw ze.
2.1 Nyob ze thaj chaw thiab nws cov yam ntxwv: Ib cheeb tsam nyob rau hauv ib lub wavelength ntau yam nyob rau hauv lub teb qhov chaw, feem ntau hu ua ib tug ze-field los yog induced teb. Qhov chaw nyob ze feem ntau muaj cov yam ntxwv hauv qab no: nyob rau hauv qhov chaw ze, tsis muaj qhov sib npaug sib luag ntawm lub zog ntawm lub zog hluav taws xob thiab lub zog ntawm cov hlau nplaum. npe: E \377H. Feem ntau, rau cov chaw hauv cheeb tsam uas muaj hluav taws xob siab thiab tsis tshua muaj tam sim no (xws li xa cov kav hlau txais xov, feeders, thiab lwm yam), cov hluav taws xob hluav taws xob muaj zog dua li cov hlau nplaum. Rau cov khoom siv hluav taws xob uas tsis tshua muaj hluav taws xob thiab siab tam sim no (xws li pwm ntawm qee yam khoom siv cua sov induction), qhov chaw sib nqus yog ntau dua li qhov hluav taws xob. Kev siv hluav taws xob hluav taws xob hauv thaj tsam ze yog ntau dua li qhov nyob deb. Los ntawm qhov kev xav no, lub hom phiaj ntawm kev tiv thaiv electromagnetic yuav tsum nyob ze ntawm qhov chaw. Lub electromagnetic teb siv nyob rau hauv ze-tsav sib txawv ceev ceev nrog nyob deb, uas ua rau ib tug tseem ceeb tsis sib xws nyob rau hauv qhov chaw no.
Qhov chaw deb thiab nws cov yam ntxwv xa mus rau thaj tsam thaj tsam nrog thaj chaw raws li qhov chaw nruab nrab thiab ib lub vojvoog dhau ib lub vojvoog raws li qhov chaw deb, uas tuaj yeem raug xa mus rau qhov chaw hluav taws xob. Cov yam ntxwv tseem ceeb ntawm thaj chaw deb yog raws li hauv qab no: nyob rau hauv thaj av deb, tag nrho cov hluav taws xob hluav taws xob yog qhov pib tawg thiab nthuav tawm hauv daim ntawv ntawm cov hluav taws xob hluav taws xob, thiab qhov txo qis ntawm cov hluav taws xob siv hluav taws xob hauv daim teb no qeeb qeeb dua li hauv qhov induced teb. Hauv thaj chaw deb, muaj kev sib raug zoo ntawm lub zog hluav taws xob thiab lub zog hlau nplaum raws li hauv qab no: nyob rau hauv lub thoob ntiaj teb system ntawm units, E=377H, cov kev taw qhia ntawm hluav taws xob teb thiab magnetic teb ua hauj lwm yog perpendicular rau txhua. lwm yam, thiab ob qho tib si yog perpendicular rau cov kev taw qhia ntawm electromagnetic yoj propagation. Qhov chaw deb yog qhov chaw tsis muaj zog, thiab nws qhov kev siv hluav taws xob electromagnetic yog me me.
