Nyob rau lub sijhawm no ntawm kev txhim kho cov ntaub ntawv ceev ceev, kev sib txuas lus thev naus laus zis tau dhau los ua lub zog tseem ceeb rau kev vam meej hauv zej zog. Los ntawm kev sib txuas lus hauv xov tooj txhua hnub thiab kev siv internet mus rau kev lag luam automation thiab kev saib xyuas tej thaj chaw deb, kev sib txuas lus cables ua "txoj kev loj" ntawm cov ntaub ntawv xa mus thiab ua lub luag haujlwm tseem ceeb. Ntawm ntau hom kev sib txuas lus cables, cov coaxial cable sawv tawm vim nws cov qauv tshwj xeeb thiab kev ua tau zoo dua, tseem tshuav ib qho tseem ceeb tshaj plaws rau kev xa xov hluav taws xob.
Keeb kwm ntawm lub coaxial cable hnub rov qab mus rau thaum xaus ntawm lub xyoo pua 19th. Nrog rau kev tshwm sim thiab kev hloov pauv ntawm xov tooj cua kev sib txuas lus thev naus laus zis, muaj qhov xav tau ceev ceev rau lub cable uas muaj peev xwm xa tau cov teeb liab muaj zog heev. Xyoo 1880, tus kws tshawb fawb Askiv Askiv Oliver Heaviside thawj zaug tau tshaj tawm lub tswv yim ntawm coaxial cable thiab tsim nws cov qauv yooj yim. Tom qab kev txhim kho tas mus li, coaxial cables maj mam pom daim ntawv thov dav hauv kev sib txuas lus, tshwj xeeb hauv cable TV, xov tooj cua sib txuas lus, thiab radar systems.
Txawm li cas los xij, thaum peb hloov peb txoj kev tsom mus rau ib puag ncig marine - tshwj xeeb tshaj yog nyob rau hauv nkoj thiab offshore engineering - coaxial cables ntsib teeb meem ntau. Marine ib puag ncig yog complex thiab sib txawv. Thaum lub sij hawm navigation, ships raug yoj cuam tshuam, ntsev tsuag corrosion, kub hloov, thiab electromagnetic cuam tshuam. Cov xwm txheej hnyav no ua rau muaj kev xav tau ntau dua ntawm kev ua haujlwm cable, ua rau muaj kev sib tw marine coaxial cable. Tshwj xeeb tsim rau marine ib puag ncig, marine coaxial cables muab kev tiv thaiv kev ua tau zoo thiab kev tiv thaiv zoo tshaj plaws rau kev cuam tshuam ntawm electromagnetic, ua rau lawv tsim nyog rau kev sib kis mus ntev thiab high-bandwidth, kev sib txuas lus ceev cov ntaub ntawv. Txawm nyob rau hauv qhov hnyav offshore tej yam kev mob, marine coaxial cables tuaj yeem xa cov teeb liab ruaj khov thiab ntseeg tau.
Marine coaxial cable yog ib qho kev sib txuas lus zoo tshaj plaws nyob rau hauv ob qho tib si qauv thiab cov khoom siv kom tau raws li qhov xav tau ntawm cov dej hiav txwv ib puag ncig. Muab piv rau cov qauv coaxial cables, marine coaxial cables txawv heev hauv kev xaiv cov khoom siv thiab cov qauv tsim.
Lub hauv paus qauv ntawm ib tug marine coaxial cable muaj plaub yam: sab hauv conductor, rwb thaiv tsev txheej, txheej conductor, thiab sheath. Qhov kev tsim no ua rau muaj txiaj ntsig zoo ntawm cov teeb liab kis tau zoo thaum txo cov teeb liab attenuation thiab cuam tshuam.
Inner Conductor: Sab hauv tus neeg xyuas pib yog lub hauv paus ntawm cov tubrog nkoj coaxial cable, feem ntau yog ua los ntawm cov tooj liab siab purity. Copper cov conductivity zoo heev ua kom cov teeb liab tsawg tsawg thaum sib kis. Txoj kab uas hla thiab cov duab ntawm tus neeg xyuas pib sab hauv yog qhov tseem ceeb rau kev sib kis tau zoo thiab tshwj xeeb rau kev sib kis tau zoo nyob rau hauv marine tej yam kev mob.
Rwb thaiv tsev txheej: Muab tso rau nruab nrab ntawm sab hauv thiab sab nrauv, txheej rwb thaiv tsev tiv thaiv cov teeb liab to thiab luv circuits. Cov khoom siv yuav tsum muaj cov khoom zoo heev dielectric, txhua yam muaj zog, thiab tiv taus ntsev tsuag corrosion, siab thiab qis. Cov ntaub ntawv muaj xws li PTFE (polytetrafluoroethylene) thiab Ua Npuas Ncauj Polyethylene (Foam PE) - ob qho tib si dav siv hauv marine coaxial cables rau lawv qhov kev ruaj ntseg thiab kev ua haujlwm hauv qhov xav tau ib puag ncig.
Outer Conductor: Ua raws li cov txheej txheem tiv thaiv, cov neeg xyuas sab nrauv feem ntau muaj cov tinned tooj liab hlau braiding ua ke nrog txhuas ntawv ci. Nws tiv thaiv lub teeb liab los ntawm sab nraud electromagnetic cuam tshuam (EMI). Nyob rau hauv marine coaxial cables, lub shielding qauv yog ntxiv dag zog rau ntau dua EMI tsis kam thiab tiv thaiv kev vibration kev ua tau zoo, kom ntseeg tau cov teeb liab stability txawm nyob rau hauv ntxhib seas.
Sheath: Cov txheej txheej sab nraud tiv thaiv lub cable los ntawm kev puas tsuaj thiab ib puag ncig raug. Lub sheath ntawm marine coaxial cable yuav tsum yog nplaim-retardant, abrasion-resistant, thiab corrosion-resistant. Cov ntaub ntawv muaj xws liTsis tshua muaj pa halogen dawb (LSZH)polyolefin thiabPVC (polyvinyl chloride). Cov ntaub ntawv no raug xaiv tsis yog rau lawv cov khoom tiv thaiv nkaus xwb tab sis kuj ua raws li cov qauv kev nyab xeeb marine nruj.
Marine coaxial cables tuaj yeem faib ua ntau txoj hauv kev:
Los ntawm tus qauv:
Ib leeg-shield coaxial cable: nta ib txheej ntawm shielding (braid los yog ntawv ci) thiab yog haum rau cov qauv teeb liab kis tau tus mob ib puag ncig.
Ob-shield coaxial cable: Muaj ob qho txhuas ntawv ci thiab tinned tooj liab hlau braid, muab kev tiv thaiv EMI zoo tshaj plaws rau cov hluav taws xob tsis zoo.
Armored coaxial cable: Ntxiv cov hlau xaim lossis steel daim kab xev armor txheej rau kev tiv thaiv cov neeg kho tshuab hauv kev ntxhov siab lossis kev siv dej hiav txwv.
Los ntawm Zaus:
Low-frequency coaxial cable: Tsim los rau qis-zaus teeb liab xws li suab lossis cov ntaub ntawv ceev. Cov kab no feem ntau muaj tus neeg xyuas pib me me thiab cov rwb thaiv tsev nyias nyias.
High-frequency coaxial cable: Siv rau high-frequency teeb liab kis tau tus mob xws li radar systems los yog satellite kev sib txuas lus, feem ntau featuring loj conductors thiab high-dielectric tsis tu ncua cov ntaub ntawv rwb thaiv tsev kom txo attenuation thiab nce efficiency.
Los ntawm Daim Ntawv Thov:
Radar system coaxial cable: Yuav tsum muaj qhov qis qis thiab siab EMI tsis kam rau qhov tseeb radar teeb liab kis tau tus mob.
Satellite kev sib txuas lus coaxial cable: Tsim rau ntev-ntev, high-frequency kis tau tus mob nrog muaj zog tsis kam mus rau huab cua kub.
Marine navigation system coaxial cable: Siv nyob rau hauv qhov tseem ceeb navigation systems, yuav tsum muaj kev ntseeg siab, kev co kuj, thiab ntsev tsuag corrosion kuj.
Marine kev lom zem kaw lus coaxial cable: Tshaj tawm TV thiab suab teeb liab ntawm lub nkoj thiab xav tau cov teeb liab zoo meej thiab cuam tshuam tsis kam.
Kev xav tau kev ua haujlwm:
Txhawm rau kom muaj kev nyab xeeb thiab txhim khu kev lag luam nyob rau hauv ib puag ncig marine, marine coaxial cables yuav tsum ua tau raws li ntau yam kev cai:
Salt Spray Resistance: Lub siab salinity ntawm marine ib puag ncig ua rau muaj zog corrosion. Marine coaxial cable cov ntaub ntawv yuav tsum tiv thaiv ntsev tsuag corrosion kom tsis txhob degradation mus ntev.
Electromagnetic Interference Resistance: Nkoj tsim EMI khaus los ntawm ntau lub tshuab onboard. Cov ntaub ntawv tiv thaiv kev ua haujlwm siab thiab cov ntaub thaiv npog ob npaug ua kom cov teeb liab sib kis tau ruaj khov.
Vibration Resistance: Marine navigation ua rau muaj kev vibration tas li. Lub marine coaxial cable yuav tsum yog mechanically robust kom tiv taus nruam txav thiab poob siab.
Kev Tiv Thaiv Kev Kub Ntxhov: Nrog rau qhov kub ntawm -40 ° C txog + 70 ° C thoob plaws ntau thaj tsam dej hiav txwv, cov tubrog nkoj coaxial cable yuav tsum muaj kev ua haujlwm zoo ib yam nyob rau hauv huab cua.
Nplaim Retardancy: Nyob rau hauv qhov xwm txheej ntawm hluav taws kub, cable combustion yuav tsum tsis txhob tso pa ntau dhau los yog pa phem. Yog li, marine coaxial cables siv cov khoom siv hluav taws xob tsawg halogen-dawb uas ua raws li IEC 60332 nplaim hluav taws, thiab IEC 60754-1/2 thiab IEC 61034-1/2 cov pa luam yeeb tsawg, tsis muaj halogen.
Tsis tas li ntawd, cov tubrog nkoj coaxial cables yuav tsum tau ua raws li cov qauv ntawv pov thawj nruj los ntawm International Maritime Organization (IMO) thiab kev faib cov koom haum xws li DNV, ABS, thiab CCS, kom ntseeg tau tias lawv cov kev ua tau zoo thiab kev nyab xeeb hauv cov ntawv thov marine tseem ceeb.
Hais txog IB LUB NEEJ
IB LUB NTIAJ TEB tshwj xeeb hauv cov khoom siv raw rau cov hlau thiab cable tsim. Peb muab cov ntaub ntawv zoo tshaj plaws rau coaxial cables, suav nrog daim kab xev tooj liab, aluminium foil Mylar daim kab xev, thiab LSZH cov khoom siv dav siv hauv marine, telecom, thiab kev siv fais fab. Nrog kev txhim khu kev qha zoo thiab kev txhawb nqa kev tshaj lij, peb pabcuam cable manufacturers thoob ntiaj teb.
Post lub sij hawm: May-26-2025