Kodi Reed Switch ndi Chiyani Ndipo Imagwira Ntchito Motani?

Mukapita ku fakitale yamakono ndikuwona zodabwitsa zamagetsi zikugwira ntchito m'chipinda cholumikizira, mudzawona masensa osiyanasiyana pawonetsero. Ambiri mwa masensawa ali ndi mawaya osiyana operekera magetsi abwino, pansi ndi chizindikiro. Kugwiritsa ntchito mphamvu kumalola sensa kuti igwire ntchito yake, kaya ndikuwona kupezeka kwa zitsulo za ferromagnetic pafupi kapena kutumiza kuwala ngati gawo lachitetezo cha malowo. Masiwichi ochepera amakina omwe amayambitsa masensa awa, monga chosinthira bango, amangofunika mawaya awiri kuti agwire ntchito zawo. Zosinthazi zimagwira ntchito pogwiritsa ntchito maginito.

Kodi Reed Switch ndi chiyani?

Kusintha kwa bango kunabadwa mu 1936. Anali ubongo wa WB Ellwood ku Bell Telephone Laboratories, ndipo adalandira chilolezo chake mu 1941. Kusinthako kumawoneka ngati kapisozi kakang'ono ka galasi kamene kamakhala ndi magetsi akutuluka kumapeto kulikonse.

Kodi Kusintha kwa Reed Kumagwira Ntchito Motani?

Makina osinthira amakhala ndi masamba awiri a ferromagnetic, olekanitsidwa ndi ma microns ochepa. Maginito akayandikira masambawa, maginito awiriwa amakokerana. Akakhudza, masambawo amatseka zomwe zimatseguka (NO) zomwe zimalola magetsi kuyenda. Ma switch ena a bango amakhalanso ndi kukhudzana kosagwirizana ndi ferromagnetic, komwe kumapanga zotuluka zotsekedwa (NC). Maginito omwe akuyandikira amachotsa cholumikiziracho ndikuchoka panjira yosinthira.

Zolumikizira zimapangidwa kuchokera ku zitsulo zosiyanasiyana, kuphatikiza tungsten ndi rhodium. Mitundu ina imagwiritsa ntchito mercury, yomwe iyenera kusungidwa pamalo oyenera kuti isinthe bwino. Envulopu yagalasi yodzazidwa ndi mpweya woziziritsa—kaŵirikaŵiri nayitrojeni—amatsekereza zolumikizanazo ndi mphamvu ya mkati mwa mpweya umodzi. Kusindikiza kumalekanitsa zolumikizana, zomwe zimalepheretsa dzimbiri ndi zopsereza zilizonse zomwe zingabwere chifukwa cholumikizana.

Reed Switch Applications mu Real World

Mupeza zowunikira muzinthu zatsiku ndi tsiku monga magalimoto ndi makina ochapira, koma malo amodzi odziwika bwino ma switch/sensa awa amagwira ntchito ndi ma alarm akuba. M'malo mwake, ma alarm ndi njira yabwino kwambiri paukadaulo uwu. Zenera losunthika kapena khomo limakhala ndi maginito, ndipo sensa imakhala pansi, ndikudutsa chizindikiro mpaka maginito atachotsedwa. Zenera litatsegulidwa—kapena ngati wina adula waya—alamu idzalira.

Ngakhale ma alarm akuba ndi njira yabwino kwambiri yosinthira bango, zida izi zimatha kukhala zazing'ono. Chosinthira chaching'ono chidzakwanira mkati mwa zida zamankhwala zomwe zidalowetsedwa zotchedwa PillCams. Wodwala akameza kachipangizo kakang'ono, adokotala amatha kuyiyambitsa pogwiritsa ntchito maginito kunja kwa thupi. Kuchedwa kumeneku kumateteza mphamvu mpaka chipangizocho chikayikidwa bwino, zomwe zikutanthauza kuti mabatire a m'boti amatha kukhala ang'onoang'ono, chinthu chofunikira kwambiri chomwe chimapangidwa kuti chiziyenda m'matumbo a munthu. Kupatula kukula kwake kochepa, pulogalamuyi ikuwonetsanso momwe ingakhudzire, popeza masensawa amatha kutenga mphamvu ya maginito kudzera m'thupi la munthu.

Masiwichi a bango safuna maginito okhazikika kuti awayambitse; cholumikizira chamagetsi chamagetsi chimatha kuyatsa. Popeza Bell Labs poyambilira adapanga masiwichi, sizodabwitsa kuti makampani amafoni adagwiritsa ntchito ma relay owongolera ndi kukumbukira mpaka zonse zidapita digito mu 1990s. Kupatsirana kotereku sikukhalanso msana wa njira yathu yolumikizirana, koma akadali ofala m'mapulogalamu ena ambiri masiku ano.

Ubwino wa Reed Relays

The Hall effect sensor ndi chida cholimba chomwe chimatha kuzindikira maginito, ndipo ndi njira imodzi yosinthira bango. Zotsatira zakunyumba ndizoyenera kugwiritsa ntchito zina, koma ma switch a bango amakhala odzipatula kwamagetsi apamwamba kwambiri kwa anzawo a boma lolimba, ndipo amakumana ndi mphamvu zochepa zamagetsi chifukwa chotseka. Kuphatikiza apo, ma switch a bango amatha kugwira ntchito ndi ma voltages osiyanasiyana, katundu ndi ma frequency, popeza chosinthiracho chimagwira ntchito ngati waya wolumikizidwa kapena wolumikizidwa. Kapenanso, mufunika madera othandizira kuti masensa a Hall agwire ntchito yawo.

Ma switch a Reed amakhala odalirika kwambiri pamakina osinthira, ndipo amatha kugwira ntchito mabiliyoni ambiri asanalephere. Kuphatikiza apo, chifukwa chomangika kwawo, amatha kugwira ntchito m'malo ophulika pomwe phokoso limatha kukhala ndi zotsatira zoyipa. Kusintha kwa bango kungakhale teknoloji yakale, koma sikutha ntchito. Mutha kugwiritsa ntchito mapaketi okhala ndi ma switch a bango pama board osindikizidwa (PCBs) pogwiritsa ntchito makina osankha ndi malo.

Kumanga kwanu kotsatira kungafune mabwalo osiyanasiyana ophatikizika ndi zida, zonse zomwe zidayamba zaka zingapo zapitazi, koma musaiwale kusintha kwa bango. Imamaliza ntchito yake yosinthira m'njira yosavuta kwambiri. Pambuyo pazaka zopitilira 80 zogwiritsidwa ntchito ndikukula, mutha kudalira mawonekedwe osinthika a bango kuti agwire ntchito mosasintha.