Ungaxazulula kanjani ukuzinza kokudluliswa kwesignali yesibonisi se-LED?Isibonisi se-LED esisebenzayo sivele sibonakale sikhubazekile ngenxa yezinkinga zesignali.Uma kusemcimbini obalulekile wokuvula, ukulahlekelwa akunakulungiseka.Ukubona kanjani ukwethembeka nokuzinza kokudluliswa kwesignali sekuyinkinga enkulu okufanele onjiniyela bayixazulule.Enqubweni yokudlulisela, isignali izoba buthaka njengoba ibanga likhuphuka, ngakho-ke ukukhethwa kwendawo yokudlulisela kubaluleke kakhulu.

1. Ukuncishiswa kwesignali yokubonisa i-LED: Akunzima ukuqonda ukuthi kungakhathaliseki ukuthi iyiphi i-medium esetshenziselwa ukudlulisa, isignali izoncipha phakathi nenqubo yokudlulisela.Singabheka ikhebula lokudlulisa i-RS-485 njengesekethe efanayo eyakhiwe ama-resistors amaningana, ama-inductors nama-capacitor.Ukuphikiswa kocingo kunomphumela omncane esignali futhi kunganakwa.I-capacitance C esabalalisiwe yekhebula ibangelwa ikakhulukazi izintambo ezimbili ezihambisanayo zamapheya asontekile.Ukulahlekelwa kwesignali kubangelwa ikakhulukazi isihlungi se-LC low-pass esakhiwe i-capacitance esabalalisiwe kanye ne-inductance esabalalisiwe yekhebula.Uma izinga le-baud yokuxhumana liphakeme, kukhulu ukuncishiswa kwesignali.Ngakho-ke, lapho inani ledatha edlulisiwe lingelikhulu kakhulu futhi imfuneko yezinga lokudlulisela lingekho phezulu kakhulu, ngokuvamile sikhetha izinga le-baud elingu-9 600 bps.

2. Ukuboniswa kwesignali kulayini wokuxhumana wesikrini sokubonisa se-LED: Ngaphezu kokuncishiswa kwesignali, enye into ethinta ukudluliswa kwesignali ukubonakaliswa kwesignali.Ukungahambisani kahle kwe-impedance kanye nokuyeka ukuvinjelwa yizizathu ezimbili eziyinhloko ezibangela ukubonakaliswa kwesignali yebhasi.Isizathu 1: Ukungafani kokuphazamiseka.Ukungafani kwe-impedance ikakhulukazi ukungafani kokuphazamiseka phakathi kwe-chip ye-485 nolayini wokuxhumana.Isizathu sokuzindla ukuthi lapho ulayini wokuxhumana ungenzi lutho, isignali yawo wonke ulayini wokuxhumana uyaphazamiseka.Uma lolu hlobo lwesignali yokubonisa luqala isiqhathanisi ekufakweni kwe-chip ye-485, isignali yephutha izokwenzeka.Isixazululo sethu esijwayelekile siwukwengeza izivimbeli zokuchema zokumelana okuthile emigqeni engu-A no-B yebhasi, futhi sizidonsele phezulu naphansi ngokuhlukana, ukuze kungabikho izimpawu ezingcolile ezingalindelekile.Isizathu sesibili ukuthi i-impedance ayiqhubeki, efana nokubonakaliswa okubangelwa ukukhanya okungena kwenye i-medium kusuka ku-medium eyodwa.Ekupheleni kolayini wokudlulisela, isignali ngokuzumayo ihlangabezana ne-impedance yekhebula encane noma engekho, futhi isignali izobangela ukubonakaliswa kule ndawo.Indlela evame ukusetshenziswa yokuqeda lokhu kuboniswa iwukuxhuma i-terminal resistor yosayizi ofanayo nesici sokuvimbela ikhebula ekupheleni kwekhebula ukwenza ukuthimbezela kwekhebula kuqhubeke.Njengoba ukudluliswa kwesignali kukhebula kuqondiswa kabili, isivimbeli setheminali esinosayizi ofanayo kufanele sixhunywe ngaphesheya kwentambo yokuxhumana.

3. Umthelela wamandla asabalalisiwe wesikrini sokubonisa se-LED kumsebenzi wokudlulisa ibhasi: Ikhebula lokudlulisela ngokuvamile lipheya elisontekile, futhi amandla ayenzeka phakathi kwezintambo ezimbili ezihambisanayo zamapheya asontekile.Kukhona futhi i-capacitance encane efanayo phakathi kwekhebula nomhlabathi.Njengoba isignali ethunyelwa ebhasini yakhiwe amabhithi “1″ kanye no-“0” amaningi, lapho ihlangana namabhayithi akhethekile afana no-0×01, izinga elithi “0” lenza amandla okusabalalisa ahlangabezane nesikhathi sokushaja, futhi nini amandla Lapho izinga "1" lifika ngokuzumayo, ukushaja okuqoqwe yi-capacitor akukwazi ukukhishwa ngesikhathi esifushane, okubangela ukuwohloka kwebhithi yesiginali, bese kuthinta ikhwalithi yakho konke ukudluliswa kwedatha.

4. Iphrothokholi yokuxhumana elula nethembekile yesikrini sokubonisa se-LED: Uma ibanga lokuxhumana lilifushane futhi indawo yohlelo lokusebenza ingaphazamisi kangako, ngezinye izikhathi sidinga kuphela indlela elula yokuxhumana ukuze siqedele yonke imisebenzi yephrojekthi, kodwa iningi indawo yesicelo ayilona icala.isifiso sokuvelela.Esigabeni sokuqala sephrojekthi, kufingqiwe ukuthi izintambo ziwuchwepheshe (njengokugcina ibanga elithile phakathi kolayini wesiginali kanye nelayini yamandla), ukungakwazi ukunqunywa kwebanga lokuxhumana, izinga lokuphazamiseka eduze kolayini wokuxhumana, noma ngabe ulayini wokuxhumana usebenzisa izintambo ezisontekile ezivikelekile, njll. Lezi zici zonke ezesistimu.Ukuxhumana okuvamile kunomthelela omkhulu.Ngakho-ke, kubaluleke kakhulu ukudweba iphrothokholi yokuxhumana ephelele.