Ngati mudagwiritsapo ntchito kulumikizana kwa RF (ma radio frequency), ma network a m'manja, kapena ma antenna system, mungakumane ndi mawu akuti chingwe cha LMR. Koma kodi kwenikweni ndi chiyani ndipo chifukwa chiyani chimagwiritsidwa ntchito kwambiri? Munkhaniyi, tifufuza kuti chingwe cha LMR ndi chiyani, makhalidwe ake ofunikira, komanso chifukwa chake ndi chisankho chomwe chimakondedwa kwambiri pakugwiritsa ntchito RF, ndikuyankha funso lakuti 'Kodi chingwe cha LMR ndi chiyani?'.
Kumvetsetsa chingwe cha LMR coaxial
Chingwe cha LMR ndi chingwe cha coaxial chomwe chimapangidwira kutumiza ma signal amphamvu komanso otsika mtengo mu RF applications. Ma wire a LMR amapangidwa ndi Times Microwave Systems ndipo amadziwika kuti ndi otetezeka bwino, otsika mtengo, komanso olimba, zomwe zimapangitsa kuti akhale abwino kwambiri pa GPS yolumikizirana opanda zingwe, Njira yabwino kwambiri yogwiritsira ntchito radar ndi ma RF system ena. Mosiyana ndi ma wire a coaxial achikhalidwe, ma wire a LMR amapangidwa ndi zigawo zingapo za zotchingira ndi zida zamagetsi kuti zitsimikizire kuti ma signal ndi abwino. Amabwera m'makulidwe osiyanasiyana oti musankhe, monga LMR-195, LMR-240, LMR-400, ndi LMR-600, iliyonse yopangidwira zofunikira zosiyanasiyana pakukonza mphamvu ndi kutaya ma signal.
Makhalidwe akuluakulu a chingwe cha LMR coaxial
Zingwe za LMR zimaonekera bwino kwambiri pakupanga zingwe za coaxial chifukwa cha kapangidwe kake kapadera komanso ubwino wake:
1. Kutayika kochepa kwa chizindikiro
Chimodzi mwa ubwino wofunika kwambiri wa zingwe za LMR zomwe zimataya chizindikiro chochepa ndi kuchepa kwa mphamvu pa mtunda wautali (kutaya chizindikiro). Izi zimachitika kudzera mu kutchinjiriza kwa dielectric kwapamwamba komanso kuteteza, komwe kumachepetsa kutayika kwa mphamvu pamene zizindikiro zikudutsa m'zingwe.
2. Kugwira ntchito bwino kwambiri poteteza
Kapangidwe ka chingwe cha LMR kali ndi zigawo zingapo zotetezera, nthawi zambiri kuphatikizapo zotetezera za aluminiyamu kuti ziteteze EMI (kusokoneza kwa electromagnetic). Kuluka zotetezera zakunja kumawonjezera kulimba komanso kumachepetsa kusokoneza. Zotetezerazi zimatsimikizira kuti zizindikiro zolimba komanso zomveka bwino, zomwe zimapangitsa kuti zingwe za LMR zikhale chisankho chabwino kwambiri pakugwiritsa ntchito RF mosavuta.
3. Kulimba komanso kukana nyengo
Times Microwave Systems imapanga zingwe za LMR, zomwe chidendene chake chakunja cholimba chimapangidwa ndi polyethylene (PE) kapena thermoplastic elastomer (TPE), zomwe zimapangitsa kuti zisawonongeke ndi kuwala kwa ultraviolet, chinyezi, ndi kutentha kwambiri. Mitundu ina, monga LMR-UF (Ultra Flex), imapereka kusinthasintha kowonjezera pamakina omwe amafunika kupindika ndi kusuntha pafupipafupi.
4. Kukhazikitsa kosavuta komanso kosinthasintha
Poyerekeza ndi zingwe zokhazikika za coaxial, zingwe za LMR zimakhala zosinthasintha kwambiri komanso zopepuka, zomwe zimapangitsa kuti kuyika kwake kukhale kosavuta. Utali wopindika wawo ndi wocheperako kwambiri kuposa wa zingwe zofanana za RF, zomwe zimathandiza kuti zikhazikike molimba m'malo otsekedwa.
5. Kugwirizana ndi zolumikizira za RF
Zingwe za LMR zimathandiza zolumikizira zingapo, kuphatikizapo zolumikizira zamtundu wa N (zomwe zimagwiritsidwa ntchito kwambiri mu mapulogalamu a antenna ndi RF). Cholumikizira cha SMA (cha ma waya ndi ma GPS). Cholumikizira cha BNC (chodziwika bwino mu kuwulutsa ndi kulumikizana). Kugwirizana kumeneku kumawapangitsa kukhala osinthika kwambiri m'mafakitale osiyanasiyana.
Kugwiritsa Ntchito Kawirikawiri kwa Zingwe za LMR
Chifukwa cha magwiridwe antchito ake abwino kwambiri, zingwe za LMR zimagwiritsidwa ntchito kwambiri m'mafakitale omwe amadalira kulumikizana kwa RF. Zina mwa ntchito zomwe zimagwiritsidwa ntchito kwambiri ndi monga ma netiweki opanda zingwe ndi mafoni, makina a antenna ndi RF, kulumikizana kwa GPS ndi satelayiti, kugwiritsa ntchito njira zoyendera ndege, kuyang'anira ndi chitetezo.
Sankhani chingwe choyenera cha LMR
Kusankha chingwe choyenera cha LMR kumadalira zinthu zingapo, kuphatikizapo kuchuluka kwa ma frequency, mtunda, mphamvu yogwiritsira ntchito, komanso momwe zinthu zilili. Nazi zina mwazosankha zomwe zimapezeka nthawi zambiri:
LMR-195 ndi LMR-240: Yoyenera kugwiritsa ntchito pa intaneti yapafupi monga ma antenna a Wi-Fi ndi machitidwe a GPS.
LMR-400: Njira yotsika mtengo pakati yomwe imagwiritsidwa ntchito kwambiri m'makompyuta a mawayilesi am'manja ndi a njira ziwiri.
LMR-600: Yoyenera kwambiri kugwiritsa ntchito mtunda wautali komwe kutayika kwa chizindikiro kuyenera kuchepetsedwa kwambiri.
Ngati mukufuna kusinthasintha kwa mapulogalamu a pafoni, chingwe cha LMR-UF (Ultra Flex) ndi chisankho chabwino.
Nthawi yotumizira: Mar-13-2025