Le khasiIsikrini sokubonisaOkwamanje kusetshenziswa kungazelelwe kuvela kubunjiwe ngenxa yezinkinga zesiginali. Uma ilahlekile ngesikhathi somkhosi omkhulu wokuvula, kungaba ukungcibisa. Ungaqinisekisa KanjaniUkwethembeka nokuqina kwesiginaliUkudluliselwa sekuhlotshiswe onjiniyela okufanele babhekane nakho. Isiginali yenza buthaka njengoba ibanga likhuphuka ngesikhathi sokudluliselwa. Ukukhethwa kokudluliselwa okuphakathi kubaluleke kakhulu.
01 AtTeNaliation
Akunzima ukukuqonda lokho amasiginali, kungakhathalekile ukuthi bathembele kuphi ekudluliseleni, bazothola i-at hatnuation ngesikhathi senqubo yokuhambisa. Singabheka ikhebula lokuhambisa le-RS-485 njenge-Circuit efanayo ehlanganiswe nabaphikisi abaningana, abangenayo, kanye nama-capacitors ahlanganisiwe. Ukumelana nocingo kunomthelela omncane kusiginali futhi kunganakwa. I-capacitance esatshalaliswa i-capcacitance C yekhebula ikhiqizwa ikakhulukazi izintambo ezimbili ezihambisanayo ze-pair esontekile. Ukulahleka kwezimpawu ikakhulukazi kungenxa yesihlungi esiphansi se-LC ehlanganiswe ngokusatshalaliswa kwamakhono kanye nokusatshalaliswa kwentambo. Izinga eliphakeme kakhulu lezokuxhumana bad, likhulisa i-attenciation enkulu. Ngakho-ke, lapho inani lemininingwane lidluliselwa lingesikhulu kakhulu futhi isidingo sokuhambisa isilinganiso asiphezulu kakhulu, ngokuvamile sikhetha isilinganiso se-baud se-9600 bps.
I-02 Signal Signal ezisekelweni zokuxhumana
Ngaphezu kwe-attenuation yesiginali, enye into ethinta ukuhanjiswa kwesiginali kuyinto ekhombisa isibonakaliso. Ukuphazamiseka kwe-Imperance kanye nokungaziphathi kahle kwezizathu eziphambili zokuboniswa kwesiginali ekwakhiweni kwamabhasi. 1, Ukuphazamiseka kwe-Imperance, ikakhulukazi kusho ukuthi ukungahambi kahle kokuphazamiseka phakathi kwe-485 chip kanye nelayini yezokuxhumana. Isizathu sokukhonjiswa ukuthi lapho umugqa wokuxhumana ungasebenzi, lonke uphawu lokuxhumana luyaxaka. Lapho lolu hlobo lwesibonakaliso se-Reflection lungela ukuqhathanisa endaweni yokugcina ye-485 chip, kuzovela isiginali eyiphutha. Isixazululo sethu Jikelele ukuguqula ibhasi ukuba sengeze i-bias revistor enenani elithile lokumelana nomugqa we-B, hlukana nokuyidonsa phezulu naphansi, ukuze amasiko angenakulindeleka futhi anezinkinga angeke azenze. 2, ukunqamula kwe-Imperance kufana nokuboniswa okubangelwa ukukhanya okungena kwelinye izwe kusuka ku-audium eyodwa. Lapho isinali lihlangabezana nentambo ephansi kakhulu noma kungabikho ukuqubuka ekugcineni komugqa wokuhambisa, kuzodala ukuboniswa ngalesi sikhathi. Indlela esetshenziswa kakhulu yokuqeda le nkomba ukuxhumanisa umphatheli we-terminal ekugcineni kwentambo elilingana nosayizi wentambo, okwenza ukungcola kwentambo, okwenza ukungcola kwentambo kuqhubeka. Ngenxa yokudluliselwa kwe-bitirectional kwamasiginali kumakhebuli, umzabalazo we-terminal wosayizi ofanayo udinga ukuxhunywa ngaphesheya kwenye ukuphela kwentambo yokuxhumana.
03 Ithonya lokusakazwa kwamakhono kumsebenzi wokudluliswa kwebhasi
Izintambo zokuhambisa zivame ukuqunjelwa amakhebuli ama-pair, futhi amandla enza phakathi kwezintambo ezimbili ezihambisanayo zezintambo ezimbili ezisontekile. Kukhona futhi amandla amancane afanayo phakathi kwentambo nomhlaba. Ngenxa yokuthi isiginali edluliselwa ebhasini ihlanganiswa ngamabhithi amaningi "1" kanye "no" Kodwa-ke, lapho izinga elithi "1" libiza ngengozi, inkokhiso eqoqiwe ye-capacitor ayikwazi ukukhishwa ngesikhathi esifushane, okuholela ekuguqukeni kwamabhithi wesiginali futhi kuthinte ikhwalithi yokudluliswa kwedatha.
04 ukuthuthukisa uhlelo lokuxhumana olulula noluthembekile
Lapho ibanga lezokuxhumana lifushane futhi imvelo yohlelo lokusebenza ingabi yinkinga kancane, kwesinye isikhathi sidinga ukuxhumana okulula kwendlela eyodwa ukuqedela umsebenzi ogcwele wephrojekthi, kepha izindawo eziningi zohlelo lokusebenza azifani nalokhu. Esesigabeni sokuqala sephrojekthi, izici ezinjengokuthi i-wiring inguchwepheshe (njengokugcina ibanga elithile phakathi kwezimpawu zokuxhumana), izinga lokuphazamiseka okuvikelekile, futhi izintambo ezivikelekile zisetshenziselwa ukuxhumana okuhle ekuxhumaneni okujwayelekile kohlelo. Ngakho-ke, kubaluleke kakhulu ukuthuthukisa iphrothokholi yokuxhumana ephelele.
Isikhathi Seposi: Aug-26 26-2024
