Isithiyo sokuphepha sikhawulela amandla angena kusayithi, okungukuthi, i-voltage kanye nomkhawulo wamanje, ukuze umugqa wensimu ungakhiqizi izinhlansi ngaphansi kwanoma yisiphi isimo, ukuze ungabangeli ukuqhuma.Le ndlela yokuvikela ukuqhuma ibizwa ngokuthi ukuphepha kwangaphakathi.Izithiyo zethu zokuphepha ezivamile zihlanganisa imingcele yokuphepha ye-zener, imingcele yokuphepha ye-transistor, kanye nemingcele yokuphepha ehlukanisiwe ye-transistor.Lezi zithiyo zokuphepha zinezinzuzo zazo futhi zonke zingabasizi ekukhiqizeni izimboni.Abahleli abalandelayo abavela ku-Suixianji.com bazokwethula isimiso sokusebenza nomsebenzi wokuvimbela ukuphepha, kanye nomehluko kusukela kumgoqo wokuzihlukanisa.
Isithiyo sokuphepha yitemu elivamile, elihlukaniswe ngokwesithiyo sokuphepha se-zener kanye nesithiyo sokuphepha sokuzihlukanisa, umgoqo wokuphepha osodwa ubizwa ngokuthi umgoqo wokuzihlukanisa.
Indlela umgoqo wokuphepha osebenza ngayo
1. Umgomo wokusebenza we-signal isolator:
Okokuqala, isiginali ye-transmitter noma insimbi iyashintshwa futhi iguqulwe idivayisi ye-semiconductor, bese ihlukaniswa futhi iguqulelwe idivayisi ezwela ukukhanya noma ezwela kazibuthe, bese yehliswa futhi iguqulelwe kusignali yasekuqaleni ngaphambi kokuhlukaniswa, namandla. ukunikezwa kwesignali ehlukanisiwe kuhlukanisiwe ngesikhathi esifanayo..Qinisekisa ukuthi isignali eguquliwe, ukunikezwa kwamandla kanye nomhlabathi kuzimele ngokuphelele.
2. Umgomo wokusebenza wokuvimbela ukuphepha kwe-Zener:
Umsebenzi oyinhloko wesithiyo sokuphepha ukukhawulela ikhono eliyingozi lendawo ephephile yokungena endaweni eyingozi, kanye nokunciphisa i-voltage kanye namanje okuthunyelwa endaweni eyingozi.
I-Zener Z isetshenziselwa ukukhawulela i-voltage.Uma i-loop voltage iseduze nenani lomkhawulo wokuphepha, i-Zener ivuliwe, ukuze i-voltage ngaphesheya kwe-Zener ihlale igcinwe ngaphansi komkhawulo wokuphepha.I-Resistor R isetshenziselwa ukukhawulela okwamanje.Uma i-voltage inomkhawulo, ukukhethwa okufanele kwevelu ye-resistor kungakhawulela i-loop yamanje ngaphansi kwevelu yomkhawulo wamanje ophephile.
Umsebenzi we-fuse F ukuvimbela ukwehluleka komkhawulo kagesi wesekethe ngenxa yeshubhu ye-zener eshaywa i-current enkulu egeleza isikhathi eside.Lapho i-voltage idlula inani lomkhawulo we-voltage ephephile isetshenziswa kusekethe, ishubhu ye-Zener ivuliwe.Uma ingekho i-fuse, i-current egeleza ngeshubhu ye-Zener izokhuphuka ngokungapheli, futhi ekugcineni ishubhu ye-Zener izoshaywa, ukuze isifumbathiso silahlekelwe umkhawulo waso kagesi.Ukuqinisekisa ukuthi isinqamuli sevoltheji yesifumbathiso siphephile, ifuse ivunguza ngokushesha okuphindwe kashumi kunalokho okungavuthwa yi-Zener.
3. Umgomo wokusebenza wesivimbeli sokuphepha sokuhlukanisa isignali esihlukanisiwe:
Uma kuqhathaniswa nesithiyo sokuphepha se-zener, isithiyo sokuphepha esisodwa sinomsebenzi wokuhlukaniswa kwe-galvanic ngaphezu kwemisebenzi ye-voltage kanye nokukhawula kwamanje.Umgoqo wokuzihlukanisa uvame ukwakhiwa izingxenye ezintathu: iyunithi yokunciphisa amandla e-loop, iyunithi yokuhlukanisa i-galvanic kanye neyunithi yokucubungula isignali.Iyunithi yomkhawulo wamandla we-loop iyingxenye eyinhloko yesithiyo sokuphepha.Ngaphezu kwalokho, kukhona amasekhethi okuphakela amandla asizayo okushayela amathuluzi enkundla namasekhethi okuthola ukuthola isignali yezinsimbi.Iyunithi yokucubungula isignali yenza ukucubungula isignali ngokuvumelana nezidingo zokusebenza zesithiyo sokuphepha.
Indima yezithiyo zokuphepha
Isithiyo sokuphepha siyisisetshenziswa esibalulekile sokuphepha ezimbonini eziningi.Ikakhulukazi ibamba noma isebenzisa izinto ezithile ezivuthayo, ezifana nowoyela ongahluziwe nokunye okuphuma ku-oyela ongahluziwe, utshwala, igesi yemvelo, impushana, njll. Ukuvuza noma ukusetshenziswa okungafanele kwanoma iyiphi yalezi zinto kuzoholela endaweni eqhumayo.Ukuze kuphephe izimboni kanye nabantu ngabanye, kuyadingeka ukuqinisekisa ukuthi indawo yokusebenza ngeke ibangele ukuqhuma.Enqubweni yalezi zivikelo, umgoqo wokuphepha udlala indima ebaluleke kakhulu.indima ebalulekile,
Umgoqo wokuphepha utholakala phakathi kwegumbi lokulawula kanye nezinto zokusebenza eziphephile ngaphakathi endaweni eyingozi.Ngokuyinhloko idlala indima yokuvikela.Noma yiziphi izinto ezisebenza ngogesi ohlelweni lokukhiqiza zingase zibangele ukuqhuma, izinhlansi ezihlukahlukene ezingqubuzanayo, ugesi omile, izinga lokushisa eliphezulu, njll. Konke akunakugwenywa ekukhiqizeni kwezimboni, ngakho-ke umgoqo wokuphepha uhlinzeka ngesilinganiso sokuvikela ukukhiqizwa kwezimboni.
Kumelwe kube nesistimu yokubeka phansi ethembeke kakhulu phakathi nenqubo yokufaka, futhi amathuluzi asensimini avela endaweni eyingozi kufanele ahlukaniswe.Uma kungenjalo, isignali ayikwazi ukudluliselwa ngendlela efanele ngemva kokuxhunywa phansi, okuzothinta ukuzinza kwesistimu.
Umehluko phakathi kwesithiyo sokuphepha kanye nesithiyo sokuzihlukanisa
1. Umsebenzi wokuhlukanisa isignali
Vikela iluphu yokulawula ephansi.
Nciphisa umthelela womsindo we-ambient kusekethe yokuhlola.
Cindezela ukuphazamiseka kokumiswa komphakathi, i-frequency converter, i-solenoid valve kanye ne-pulse engaziwa emishinini;ngesikhathi esifanayo, inemisebenzi yokunciphisa i-voltage kanye nesilinganiso samanje semishini ephansi, okuhlanganisa i-transmitter, insimbi, i-frequency converter, i-solenoid valve, okokufaka kwe-PLC/DCS nokuphumayo kanye nesixhumi esibonakalayo sokuxhumana ukuvikela okuthembekile.
2. Umgoqo wokuphepha ozimele
Isithiyo sokuzihlukanisa: Isithiyo sokuphepha esizimele, okungukuthi, ukwengeza umsebenzi wokuzihlukanisa ngesisekelo sesithiyo sokuphepha, esingavimbela ukuphazamiseka kwe-ground loop yamanje kusiginali, futhi ngesikhathi esifanayo sivikele uhlelo ethonyeni lamandla ayingozi indawo.Isibonelo, uma i-current enkulu ingena emgqeni wensimu, izophula umgoqo wokuzihlukanisa ngaphandle kokuthinta i-IO.Kwesinye isikhathi ingabuye iqondwe njenge-isolator ngaphandle komsebenzi wesithiyo sokuphepha, okungukuthi, inomsebenzi wokuhlukanisa kuphela ukuvimbela ukuphazamiseka kwesignali nokuvikela isistimu ye-IO, kodwa ayihlinzeki ngesekhethi ephephile ngaphakathi.Okwezicelo ezingaqhumi.
Yamukela isakhiwo sesekhethi esihlukanisa ngogesi okokufaka, okukhiphayo kanye nokuphakelwa kwamandla ukusuka kwenye, futhi sihlangabezana nezimfuneko zokuphepha kwangaphakathi ukuze kukhawulwe amandla.Uma kuqhathaniswa nesithiyo sokuphepha se-Zener, nakuba intengo ibiza kakhulu, izinzuzo zayo ezivelele zokusebenza ziletha izinzuzo ezinkulu ezinhlelweni zabasebenzisi:
Ngenxa yokusetshenziswa kokuhlukaniswa kwezindlela ezintathu, asikho isidingo semigqa yokumisa isistimu, okuletha ukunethezeka okukhulu ekuklameni nasekwakheni endaweni.
Izidingo zamathuluzi ezindaweni eziyingozi zincipha kakhulu, futhi asikho isidingo sokusebenzisa amathuluzi angawodwa esizeni.
Njengoba imigqa yesignali ingadingi ukwabelana nomhlabathi, ukuzinza kanye nekhono lokulwa nokuphazamiseka kokuthola nokulawula amasignali eluphu liyathuthukiswa kakhulu, ngaleyo ndlela kuthuthukiswe ukwethembeka kwayo yonke isistimu.
Isithiyo sokuphepha esihlukanisiwe sinamandla anamandla okucubungula isignali yokufaka, futhi singamukela futhi sicubungule amasiginali afana nama-thermocouples, ukumelana nokushisa, namafrikhwensi, okungenakukwazi ukukwenza lesi sivimbelo sokuphepha se-zener.
Umgoqo wokuphepha ohlukanisiwe ungakhipha amasignali amabili ahlukene ukuze unikeze amadivaysi amabili usebenzisa umthombo wesignali ofanayo, futhi uqinisekise ukuthi amasignali ala madivayisi amabili awaphazamisi, futhi ngesikhathi esifanayo athuthukise ukusebenza kokuphepha kukagesi phakathi kokuxhunyiwe. amadivaysi.
Okungenhla kumayelana nesimiso sokusebenza kanye nomsebenzi wesithiyo sokuphepha, kanye nolwazi lomehluko phakathi kwesithiyo sokuphepha kanye nesithiyo sokuzihlukanisa.Isihlukanisi sesignali ngokuvamile sibhekisela kusihlukanisi sesignali ohlelweni lwamanje olubuthakathaka, oluvikela isistimu yesignali yezinga eliphansi ethonyeni nasekuphazamisekeni kwesistimu yezinga eliphezulu.Isithiyo sokuhlukanisa isignali sixhunywe phakathi kwesekethe ephephile ngaphakathi kanye nesekhethi engaphephile ngaphakathi.Idivayisi ekhawulela i-voltage noma yamanje ehlinzekwa kusekethe ephephile ngaphakathi kwebanga eliphephile.
Isikhathi sokuthumela: Nov-26-2022