Momwe Ma Modulation and Demodulation process a Infrared Remote Control Amagwirira ntchito

M'miyoyo yathu yamakono, ma infrared remote control akhala chida chosavuta kwa ife kuwongolera zida zapakhomo. Kuyambira pawailesi yakanema kupita ku ma air conditioner, ndi ma multimedia player, kugwiritsa ntchito ukadaulo wa infrared kuli ponseponse. Komabe, mfundo yogwirira ntchito kumbuyo kwa chiwongolero chakutali cha infrared, makamaka kusinthasintha ndi kutsitsa, sichidziwika bwino. Nkhaniyi iwunika momwe ma siginoloje amagwiritsidwira ntchito ndi infrared remote control, kuwulula njira yake yolumikizirana yodalirika komanso yodalirika.

Kusinthasintha: Gawo Lokonzekera la Signal

Kusinthasintha ndi sitepe yoyamba yotumizira ma siginecha, yomwe imaphatikizapo kusandutsa zidziwitso zamalamulo kukhala mawonekedwe oyenera kutumizidwa opanda zingwe. Pachiwongolero chakutali cha infrared, njirayi imachitika pogwiritsa ntchito Pulse Position Modulation (PPM).

Mfundo za PPM Modulation

PPM ndi njira yosavuta yosinthira mawu yomwe imapereka chidziwitso posintha nthawi komanso malo apakati. Batani lililonse pamtundu wakutali lili ndi code yapadera, yomwe mu PPM imasinthidwa kukhala mndandanda wa zizindikiro za pulse. M'lifupi ndi kagawo kakang'ono ka ma pulses amasiyana malinga ndi malamulo olembera, kuonetsetsa kuti chizindikirocho ndi chapadera komanso chodziwika bwino.

Carrier Modulation

Pamaziko a PPM, chizindikirocho chiyeneranso kusinthidwa kuti chikhale chonyamulira pafupipafupi. Mafupipafupi onyamulira ndi 38kHz, omwe amagwiritsidwa ntchito kwambiri pamawunivesite akutali. Njira yosinthira imaphatikizapo kutembenuza milingo yayikulu komanso yotsika ya siginecha yosungidwa kukhala mafunde amagetsi amtundu wofananira, kulola kuti chizindikirocho chifalikire mlengalenga ndikuchepetsa kusokoneza.

Kukulitsa Chizindikiro ndi Kutulutsa

Chizindikiro chosinthidwa chimakulitsidwa kudzera mu amplifier kuonetsetsa kuti ili ndi mphamvu zokwanira zotumizira opanda zingwe. Pomaliza, chizindikirocho chimatulutsidwa kudzera mu infrared emitting diode (LED), kupanga kuwala kwa infrared komwe kumapereka malamulo owongolera ku chipangizo chomwe mukufuna.

Demodulation: Kulandila kwa Signal ndi Kubwezeretsanso

Demodulation ndi njira yosinthira yosinthira, yomwe ili ndi udindo wobwezeretsa chizindikiro cholandilidwa muzambiri zamalamulo oyamba.

Kulandila kwa Signal

Diode yolandila ya infrared (Photodiode) imalandira chizindikiro chopangidwa ndi infuraredi ndikuchisintha kukhala chizindikiro chamagetsi. Gawo ili ndilofunika kwambiri pa njira yotumizira chizindikiro chifukwa imakhudza mwachindunji ubwino ndi kulondola kwa chizindikirocho.

Kusefa ndi Kuchepetsa

Chizindikiro chamagetsi cholandiridwa chikhoza kukhala ndi phokoso ndipo chiyenera kukonzedwa kudzera mu fyuluta kuti muchotse phokoso ndi kusunga zizindikiro pafupi ndi maulendo onyamula katundu. Pambuyo pake, demodulator imazindikira malo a pulses molingana ndi mfundo ya PPM, kubwezeretsanso chidziwitso choyambirira chosungidwa.

Kukonza ma Signal and Decoding

Chizindikiro chodziwikiratu chingafunikire kukonzanso chizindikiro, monga kukulitsa ndi kupanga, kuti zitsimikizire kukhazikika ndi kulondola kwa chizindikirocho. Chizindikiro chokonzedwacho chimatumizidwa kwa microcontroller kuti iwonongeke, yomwe imazindikiritsa kachidindo kachipangizo ndi kachidindo ka ntchito molingana ndi malamulo okonzedweratu.

Kukwaniritsa Malamulo

Pamene decoding yapambana, microcontroller imapanga malangizo ogwirizana ndi ndondomeko ya ntchito, monga kulamulira kusintha kwa chipangizo, kusintha kwa voliyumu, ndi zina zotero.

Mapeto

Njira yosinthira ndi kutsitsa kwa infrared remote control ndiye maziko a njira yake yolumikizirana yodalirika komanso yodalirika. Kupyolera mu njirayi, titha kukwaniritsa kuwongolera moyenera zida zapakhomo. Ndi kupita patsogolo kosalekeza kwaukadaulo, zowongolera zakutali za infrared zimakulitsidwanso nthawi zonse kuti zikwaniritse zosowa zathu zomwe zikukula. Kumvetsetsa ndondomekoyi sikumangothandiza kuti tigwiritse ntchito bwino ma infrared remote control komanso kumatithandiza kumvetsetsa mozama zaukadaulo wolumikizirana opanda zingwe.