Xov tooj cua-nqus khoom: piav qhia, yam ntxwv, daim ntawv thov

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

theem tam sim no ntawm kev txhim kho ntawm cov khoom siv hluav taws xob hauv xov tooj cua thiab lawv cov kev siv dav dav muab cov teeb meem ntawm kev tiv thaiv hluav taws xob thiab kev nyab xeeb ntawm cov txheej txheem. Txog thaum tsis ntev los no, txheej txheej ntawm cov teeb meem no tseem nyob hauv qhov ntxoov ntxoo, txij li cov txheej txheem thev naus laus zis tsis tso cai rau lawv los txiav txim siab nthuav dav. Tab sis hnub no muaj tag nrho cov kev taw qhia rau kev txhim kho radar absorbing cov ntaub ntawv (RPM), uas muaj ntau yam hom phiaj.

Scope of RPM

Qhov yuav tsum tau siv cov ntaub ntawv zoo li no tshwm sim hauv kev ua tub rog-tiv thaiv complex, hauv kev lag luam pej xeem, kev daws teeb meem hauv kev tsim cov khoom siv hauv xov tooj cua, thiab lwm yam. Tab sis cov cuab yeej tiv thaiv thiab kev ruaj ntseg tseem yog cov Qhov tseem ceeb tshaj plaws ntawm kev thov ntawm RPM. Ntxiv mus, qhov no tsis tas yuav yog tub rog-kev ua haujlwm nyuaj. Niaj hnub nimno radar absorberscov ntaub ntawv tau ntse txawj ntse nyob rau hauv lub niche ntawm lub computer systems uas ua cov ntaub ntawv nrog rau kev twb kev txuas ntawm txoj kev tiv thaiv kev nkag mus tsis tau tso cai. Cov khoom ntawm lub hauv paus chiv keeb yog li kev tiv thaiv los ntawm electromagnetic cuam tshuam, thiab txo qis radar qhov tsis zoo yog qhov tsim nyog rau ntau yam ntawm cov pej xeem thiab tub rog. Lwm qhov yog qhov kev siv thiab cov khoom ntawm cov RPMs tshwj xeeb hauv txhua kis yuav txawv me ntsis.

RPM yog dab tsi?

chav kawm ntawm cov ntaub ntawv no tuaj yeem txhais tau los ntawm kev muaj peev xwm ntawm cov khoom muaj pes tsawg leeg thiab cov qauv ntawm cov khoom kom ntseeg tau tias qhov nqus ntawm electromagnetic zog nyob rau hauv ib tug ntau zaus. Cov tiam tshiab ntawm RPMs yog qhov muaj txiaj ntsig zoo dua rau kev hloov kho ntawm lawv lub peev xwm los hloov cov nthwv dej nqus rau hauv qee yam ntawm lub zog. Nyob rau hauv cov txheej txheem no, ntxiv rau kev nqus, phenomena xws li cuam tshuam, tawg, thiab diffraction kuj tau pom. Raws li kev tsim cov khoom siv hauv xov tooj cua, lawv yog raws li cov khoom ntawm ferromagnet. Lawv tau siv los ua cov khoom siv dav dav, tsim cov txheej txheem insulating ntawm cov khoom lag luam nrog rau cov khoom siv hluav taws xob. Nyob rau hauv cov ntaub ntawv no, ib tug yuav tsum tau ua ntej rau lub hauv paus txheej txheem ntawm lub insulator yuav tsum muaj ib tug uas tsis yog-sib nqus dielectric. Raws li qhov no, ntau yam kev hloov kho ntawm RPM tau tsim. Piv txwv li, ntxiv rau cov qauv ntawm ferromagnets, cov ntsiab lus ntawm soot lossis graphite tuaj yeem suav nrog, uas ua raws liabsorbers. Hauv kev tsim cov nqaim-ntau RPMs, qhov tseem ceeb kuj yog kev siv roj hmab lossis yas.

Qhov txawv ntawm radar absorbing cov ntaub ntawv thiab txheej

Tsis muaj qhov sib txawv nruj, hais txog kev ua tau zoo, ntawm cov khoom siv thiab cov txheej txheem rau lub hom phiaj no, tab sis cov tshuab tsim khoom thiab kev tuav txuas ntxiv ua rau nws tsim nyog kom paub qhov txawv ntawm cov kev sib cais no. Tshwj xeeb, yog tias cov ntaub ntawv tuaj yeem suav nrog hauv cov qauv thiab txawm tias lub hauv paus ntawm cov khoom lag luam, ces cov txheej txheem tsuas yog ua cov txheej txheem pabcuam ntawm qhov chaw, tsis muaj kev ua haujlwm ntawm qhov sib txawv. Nyob rau hauv ib feem, kuj muaj qhov sib txawv ntawm absorbing peev xwm, tab sis qhov zoo tshaj plaws yog qhov zoo. Nyob ntawm tus qauv, radar absorbing khoom yuav qhia tau qee qhov kev vam meej raws li cov khoom siv microwave absorber, tab sis nyob rau hauv txhua rooj plaub, qhov peev xwm no yuav yog tus yam ntxwv tsuas yog rau ib qho kev txwv xwb. Piv txwv li, niaj hnub no muaj hluav taws xob spectra ntawm radar chaw nres tsheb uas, hauv paus ntsiab lus, tsis muaj rau "kev ua" ntawm RPM.

Technical thiab kev ua haujlwm ntawm RPM

Cov ntaub ntawv muaj ntau haiv neeg hauv lawv cov qauv tsim thiab cov qauv, thiab tseem muaj qhov ntsuas qhov nruab nrab rau cov pawg tsim feem ntau ntawm RPMs. Cov yam ntxwv tseem ceeb uas cuam tshuam txog cov txiaj ntsig no suav nrog:

• Qhov ntev ntawm kev ua haujlwm nthwv dej - los ntawm 0.3 txog 25 cm.
• Kev ua haujlwm zaus spectrum yog los ntawm 300 txog 37,500 MHz.
• Magnetic permeability - los ntawm 1, 26 txog 10-6 H / m.
• Ua haujlwm kub ntau - ntawm -40 txog 60 ° C.
• Nyhav - txog 200-300 g ib 1 sq.m.

Nws yuav tsum raug coj mus rau hauv tus account tias tsis yog txhua yam khoom siv tuaj yeem tswj tau cov yam ntxwv ntawm kev ua haujlwm saum toj no hauv kev siv hnyav sab nraud. Hauv qhov kev nkag siab no, peb tuaj yeem tso tawm cov ntaub pua plag-hom Ternovnik xov tooj cua-absorbing khoom, uas yog dav siv los ntawm Lavxias teb sab tuam txhab nyob rau hauv ntau yam lag luam. Rau nws, tsis muaj kev txwv rau kev ua haujlwm hauv huab cua hnyav. Tsis tas li ntawd, cov khoom no yog resistant rau mechanical abrasion thiab tuav lub peev xwm los insulate cov khoom tsis hais lawv cov duab thiab cheeb tsam.

Ntau yam ntawm RPM

Txawm hais tias tam sim no tsis muaj qhov sib txawv meej hauv ntu RPM, cov pawg hauv qab no ntawm cov khoom siv no tuaj yeem raug txheeb xyuas qhov txawv:

• Resonant. Kuj hu ua zaus-tuned - lawv muaj peev xwm muab tag nrho los yog ib nrab neutralization ntawm absorbed yoj. Kev ua tau zoo yog txiav txim ncaj qha los ntawm qhov tuab ntawm cov khoom tiv thaiv.
• Non-resonant magnetic. Lawv muaj ferrite hauv lawv cov qauv, cov khoom uas tau muab faib rau hauv epoxy txheej. Cov khoom sib nqus radar absorbing muaj peev xwm dissipate lub zog hluav taws xob hla ib cheeb tsam loj, uas ua rau nws muaj peev xwm ua tiav qhov nruab nrab ntawm ntau zaus.
• Tsis muaj suab nrov. Raws li txoj cai, lawv yog cov txheej tuab ntawm cov insulators uas nqus cov khoom ntau ntawm cov tswv yimhluav taws xob ua ntej nws cuam tshuam cov phaj hlau rov qab.

Txhim RPM ntawm ferromagnetic hmoov

Ib hom txheej uas muaj peev xwm nqus tau hauv xov tooj cua, uas muaj cov microspheres dispersed nrog cov khoom ntawm ferrite lossis carbonyl hlau. Nyob rau hauv cov txheej txheem ntawm kev nqus ntawm high-frequency hluav taws xob nyob rau hauv cov hmoov, molecular vibrations tshwm sim, uas provoke lub tso tawm ntawm tshav kub. Tib lub zog muab tau los uas yog dissipated los yog pauv mus rau ib qho chaw cia khoom nyob ib sab. Ib txoj hauv kev zoo sib xws ntawm kev ua haujlwm tau sau tseg hauv cov ntawv ntawm cov roj hmab neoprene. Cov khoom siv no ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev sib nqus sib nqus, tab sis muaj nyob rau hauv nws cov qauv ua kom muaj zog ntxiv ntawm ferrite thiab graphite.

Ua npuas ncauj RPM

Ib pawg tshwj xeeb ntawm RPMs uas yog siv los npog cov khoom tseem ceeb mus ntev. Cov khoom siv no yog ua los ntawm polyurethane ua npuas ncauj. Nws txoj kev siv yog tsim nyog los ntawm qhov tseeb tias cov khoom kawg tau txais qhov me me thiab qhov loj me me nrog ntau qhov sib txawv ntawm kev nqus dej mus txog qhov decimeter spectrum. Txawm hais tias cov ntaub ntawv raw khoom kim dua nyob rau hauv rooj plaub no, radar-absorbing cov ntaub ntawv thiab polyurethane-based masking foam coatings muaj qhov zoo ntawm kev ua tau zoo:

• Cov yam ntxwv muaj zog siab piv rau cov khoom siv dej-polymer zoo sib xws.
• Txhim kho cov khaub ncaws zoo tsis muaj hnub kawg.
• Tsawg qhov yuav tsum tau khaws cia rau cov khoom siv.
• Ua npuas ncauj npog npognyob rau hauv lub hauv paus ntsiab lus, lawv yog yus muaj los ntawm siab adhesion, uas expands lub possibilities ntawm lawv daim ntawv thov mus rau ntau yam ntawm nto.

Kev txhim kho hauv tsev RPM

Russian cov kws tshaj lij tau ua haujlwm hauv ntau thaj chaw ntawm RPM tsim, tab sis cov ntaub ntawv raws li nanostructures yuav tsum raug xa mus rau thaj chaw muaj txiaj ntsig tshaj plaws. Lub tswv yim no, tshwj xeeb tshaj yog, tau ua tiav los ntawm Ferrit-Domen Research Institute, uas tau tsim tag nrho cov kab ntawm cov xov tooj cua nyias nyias ua los ntawm hydrogenated carbon nrog nanoelements. Qhov zoo ntawm cov khoom siv xov tooj cua hauv Lavxias ua raws li cov khoom siv nanostructured muaj xws li muaj peev xwm nqus tau ntau dua kev ua haujlwm hauv ultra-wide zaus spectrum ntawm 7-300 GHz. Tsis tas li ntawd, nrog rau kev ua haujlwm kub thiab lub zog txhua yam, cov neeg tsim khoom tau sau tseg rau ib puag ncig kev phooj ywg thiab kev siv tshuab tsis muaj pov tseg rau kev tsim cov khoom siv.

Zaj lus

Txawm hais tias qhov nthuav dav ntawm ntu RPM dav dav, nws tseem ntxov dhau los tham txog cov qauv tsim thiab tsim qauv tsim qauv rau cov khoom siv hauv chav kawm no. Qhov no feem ntau yog vim qhov tsis pub leejtwg paub uas cov kws tshawb fawb hauv daim teb no yuav tsum tau ua haujlwm, tab sis kuj tseem muaj teeb meem cuam tshuam nrog kev tsim kho thev naus laus zis. Tau txais cov khoom siv hluav taws xob zoo tshaj plaws niaj hnub no yog ua tsis tau yam tsis muaj kev siv cov khoom siv tshiab. Cov kws tshaj lij kuj tseem ua haujlwm zoo dua thiab muaj txiaj ntsig zoo ntawm kev ntsuas qhov muaj peev xwm nqus, uas txhim kho lub peev xwm los txheeb xyuas RPMs tshiab. Thiab tawm tsam keeb kwm noRaws li txoj cai, xov tooj cua nqus cov neeg ua haujlwm raws li tib ferrites, uas twb dhau los ua ib txwm muaj, tab tom poob lawv qhov cuam tshuam.