Isebenza kanjani i-Modulation and Demodulation Process of the infrared Remote Control isebenza kanjani

Ezimpilweni zethu zesimanje, izilawuli kude ze-infrared seziphenduke ithuluzi elikahle kithi lokulawula izinto zikagesi zasendlini. Kusukela kumathelevishini kuya kuma-air conditioner, kuya kubadlali be-multimedia, ukusetshenziswa kobuchwepheshe be-infrared kuyinto yonke indawo. Kodwa-ke, umgomo wokusebenza ngemuva kwesilawuli kude se-infrared, ikakhulukazi inqubo yokuguquguquka kanye nokwehlisa izinga, awaziwa kancane. Lesi sihloko sizocubungula ukucutshungulwa kwesiginali yesilawuli kude se-infrared, siveze indlela yaso yokuxhumana esebenza kahle nethembekile.

Ukuguquguquka: Isiteji Sokulungiselela Sesiginali

Ukushintshashintshashintshashintshashintshayo kuyisinyathelo sokuqala sokudlulisa isignali, okubandakanya ukuguqula ulwazi lomyalo lube yifomethi elungele ukudluliswa okungenantambo. Kusilawuli kude se-infrared, le nqubo ivamise ukwenziwa kusetshenziswa i-Pulse Position Modulation (PPM).

Izimiso ze-PPM Modulation

I-PPM iwuhlelo olulula lokuguquguquka oludlulisa ulwazi ngokushintsha ubude besikhathi nezikhala zama-pulses. Inkinobho ngayinye kusilawuli kude inekhodi ehlukile, okuthi ku-PPM iguqulelwe uchungechunge lwamasignali okushaya kwenhliziyo. Ububanzi nezikhala zama-pulses ziyahlukahluka ngokuya ngemithetho yokubhala ikhodi, iqinisekisa ukuhluka nokubonakala kwesiginali.

Ukuguquguquka Kwenkampani Yenethiwekhi

Ngokwesisekelo se-PPM, isiginali nayo idinga ukushintshwa ukuze ibe imvamisa yenkampani yenethiwekhi ethile. Imvamisa yenethiwekhi evamile ingu-38kHz, okuyifrikhwensi esetshenziswa kakhulu kuzilawuli ezikude ze-infrared. Inqubo yokushintshashintsha ihlanganisa ukuguqula amazinga aphezulu naphansi esiginali efakwe ikhodi ibe amaza kazibuthe kagesi wefrikhwensi ehambisanayo, okuvumela isignali ukuthi isakazeke kakhulu emoyeni kuyilapho inciphisa ukuphazamiseka.

Ukukhulisa Isignali kanye Nokukhishwa

Isignali eshintshiwe ikhuliswa nge-amplifier ukuqinisekisa ukuthi inamandla anele okudlulisa okungenantambo. Ekugcineni, isignali ikhishwa nge-infrared emitting diode (LED), yakhe igagasi lokukhanya kwe-infrared elidlulisela imiyalo yokulawula kudivayisi eqondiwe.

Ukwehliswa: Ukwamukelwa Kwesiginali Nokubuyiselwa

I-demodulation inqubo ephambene yokuguquguquka, enesibopho sokubuyisela isignali eyamukelwe kulwazi lomyalo wokuqala.

Ukwamukelwa Kwesiginali

I-infrared receiver diode (Photodiode) ithola isignali ye-infrared ekhishiwe futhi iyiguqule ibe isignali kagesi. Lesi sinyathelo siyisixhumanisi esiyinhloko kunqubo yokudlulisa isignali ngoba sithinta ngokuqondile ikhwalithi nokunemba kwesignali.

Ukuhlunga kanye Nokwehliswa

Isignali kagesi eyamukelwe ingase iqukathe umsindo futhi idinga ukucutshungulwa ngesihlungi ukuze kususwe umsindo futhi kugcinwe amasignali eduze nemvamisa yenkampani yenethiwekhi. Kamuva, i-demodulator ithola indawo yama-pulses ngokuvumelana nesimiso se-PPM, ibuyisela ulwazi lokuqala olufakwe ikhodi.

Ukucutshungulwa Kwesiginali kanye Nokukhipha amakhodi

Isiginali eyehlisiwe ingase idinge ukucutshungulwa kwesignali okwengeziwe, njengokukhulisa nokubunjwa, ukuze kuqinisekiswe ukuzinza nokunemba kwesiginali. Isignali ecutshunguliwe ibe isithunyelwa kusilawuli esincane ukuze siqoshwe, esihlonza ikhodi yokuhlonza idivayisi kanye nekhodi yokusebenza ngokwemithetho yokufaka amakhodi esethiwe.

Ukwenziwa Kwemiyalo

Uma ukukhishwa kwekhodi sekuphumelele, isilawuli esincane senza imiyalelo ehambisanayo esekelwe kukhodi yokusebenza, njengokulawula ukushintshwa kwedivayisi, ukulungiswa kwevolumu, njll. Le nqubo iphawula ukuqedwa kokugcina kokudluliswa kwesignali yesilawuli kude se-infrared.

Isiphetho

Inqubo yokuguquguquka nokwehliswa kwesilawuli kude se-infrared iwumongo wendlela yayo yokuxhumana ephumelelayo nethembekile. Ngale nqubo, singakwazi ukufinyelela ukulawula okunembile kwempahla yasendlini. Ngokuthuthuka okuqhubekayo kobuchwepheshe, izilawuli ezikude ze-infrared nazo zihlala zithuthukiswa futhi zithuthukiswa ukuze zihlangabezane nezidingo zethu ezikhulayo zokulawula. Ukuqonda le nqubo akusisizi nje kuphela ukuthi sisebenzise izilawuli kude ze-infrared kangcono kodwa futhi kusivumela ukuthi sibe nokuqonda okujulile kobuchwepheshe bokuxhumana okungenantambo.