Chii chinonzi 4-20mA inobuda?
1. Nhanganyaya
4-20mA (milliamp) imhando yemagetsi ikozvino anowanzo shandiswa kufambisa masaini eanalog mumaindasitiri process control uye otomatiki masisitimu.Iyo inozvimiririra, yakaderera-voltage ikozvino loop inokwanisa kutumira masaini pamusoro pemadaro marefu uye kuburikidza nemagetsi nharaunda dzine ruzha pasina kushatisa zvakanyanya chiratidzo.
Iyo 4-20mA renji inomiririra kureba kwemamirimita gumi nematanhatu, ine mamirimita mana anomiririra hushoma kana zero kukosha kwechiratidzo uye 20 milliamp inomiririra huwandu kana hwakazara-chiyero kukosha kwechiratidzo.Iko kukosha chaiko kweiyo analog siginecha iri kufambiswa inoiswa encoded sechinzvimbo mukati meiyi renji, nedanho razvino richienderana nekukosha kwechiratidzo.
4-20mA inobuda inowanzo shandiswa kufambisa masaini eanalog kubva kune masensa uye zvimwe zvigadzirwa zvemumunda, senge tembiricha probes uye kudzvanya transducer, kudzora uye kutarisa masisitimu.Inoshandiswawo kutumira masaini pakati pezvikamu zvakasiyana mukati meiyo control system, senge kubva kune programmable logic controller (PLC) kune valve actuator.
Muindasitiri otomatiki, iyo 4-20mA inobuda chiratidzo chinowanzo shandiswa kufambisa ruzivo kubva kune masensor nemimwe michina.4-20mA inobuda, inozivikanwawo seyazvino loop, inzira yakasimba uye yakavimbika yekufambisa data pamusoro pemadaro marefu, kunyangwe munzvimbo dzine ruzha.Iyi blog post inoongorora izvo zvekutanga zve4-20mA kubuda, kusanganisira mashandisiro ainoita uye zvakanakira nekuipira kuishandisa mumaindasitiri otomatiki masisitimu.
4-20mA inobuda chiratidzo cheanalog chinofambiswa uchishandisa inogara iripo ye4-20 milliamps (mA).Inowanzo shandiswa kufambisa ruzivo nezve kuyerwa kwehuwandu hwemuviri, senge kudzvanywa, tembiricha, kana kuyerera.Semuyenzaniso, tembiricha sensor inogona kufambisa 4-20mA siginecha zvinoenderana netembiricha yainoyera.
Imwe yemabhenefiti makuru ekushandisa 4-20mA inobuda ndeyekuti chiyero chepasirese muindasitiri otomatiki.Zvinoreva kuti zvakasiyana-siyana zvezvishandiso, zvakadai semasensor, controllers, uye actuators, zvakagadzirirwa kuti zvienderane ne 4-20mA zviratidzo.Inoita kuti kubatanidza zvishandiso zvitsva muhurongwa huripo kuve nyore, chero bedzi ivo vachitsigira 4-20mA kubuda.
2.) Ko 4-20mA inobuda inoshanda sei?
4-20mA inobuda inofambiswa uchishandisa yazvino loop, iyo ine transmitter uye inogamuchira.Iyo transmitter, kazhinji sensor kana chimwe chishandiso chinoyera huwandu hwemuviri, inogadzira iyo 4-20mA chiratidzo uye inotumira kune anogamuchira.Iye anogamuchira, kazhinji mutongi kana chimwe chishandiso chine basa rekugadzirisa chiratidzo, inogamuchira iyo 4-20mA chiratidzo uye inodudzira ruzivo rwainarwo.
Kuti iyo 4-20mA chiratidzo chifambiswe nenzira kwayo, zvakakosha kuchengetedza nguva dzese kuburikidza nechiuno.Inowanikwa nekushandisa ikozvino-kumisa resistor mune transmitter, iyo inogadzirisa huwandu hwezvino hunogona kuyerera kuburikidza nedunhu.Ikozvino-inomisa resistor's kuramba inosarudzwa kuti ibvumire yaidiwa huwandu hwe4-20mA kuyerera nemuchiuno.
Imwe yemabhenefiti akakosha ekushandisa yazvino loop ndeyekuti inobvumira iyo 4-20mA siginecha kuti ifambiswe pamusoro pemadaro marefu pasina kutambura nekuderedzwa kwechiratidzo.Imhaka yekuti chiratidzo chinofambiswa seyazvino kwete voltage, iyo isingatani kukanganiswa uye ruzha.Pamusoro pezvo, zvishwe zvazvino zvinogona kufambisa chiratidzo che4-20mA pamusoro pemaviri akamonyoroka kana coaxial tambo, kuderedza chiratidzo chekushatisa njodzi.
3.) Zvakanakira kushandisa 4-20mA kubuda
Kune akati wandei mabhenefiti ekushandisa 4-20mA kuburitsa mumaindasitiri otomatiki masisitimu.Mamwe emabhenefiti akakosha anosanganisira:
Kufambiswa kwemasaini kureba:Iyo 4-20mA inobuda inogona kufambisa masaini pamusoro pemarefu madaro pasina kutambura kwechiratidzo kuderedzwa.Yakanakira kushandiswa mumashandisirwo ayo anodhindisa uye anogashira ari kure kure, senge muhombe maindasitiri zvidyarwa kana offshore oiri rigs.
A: Kudzivirira ruzha rwepamusoro:Zvishwe zvazvino zvinodzivirira ruzha uye kukanganisa, izvo zvinoita kuti zvive zvakanakira kushandiswa munzvimbo dzine ruzha.Zvinonyanya kukosha mumaindasitiri, uko ruzha rwemagetsi kubva kumamotor uye zvimwe midziyo inogona kukonzera matambudziko nekufambiswa kwechiratidzo.
B: Kuenderana neyakasiyana siyana yemidziyo:Sezvo 4-20mA inobuda chiyero chepasirese mumaindasitiri otomatiki, inoenderana nemidziyo yakawanda.Inoita kuti kubatanidza zvishandiso zvitsva muhurongwa huripo kuve nyore, chero bedzi ivo vachitsigira 4-20mA kubuda.
4.) Kuipa kwekushandisa 4-20mA kubuda
Nepo 4-20mA kuburitsa kune akawanda mabhenefiti, kune zvakare zvimwe zvinokanganisa pakuishandisa mumaindasitiri otomatiki masisitimu.Izvi zvinosanganisira:
A: Kugadziriswa kushoma:4-20mA inobuda chiratidzo cheanalog chinofambiswa uchishandisa inoenderera yehukoshi.Zvisinei, kugadziriswa kwechiratidzo kunogumira nehuwandu hwe4-20mA, iyo inongova 16mA.Izvi zvinogona kunge zvisina kukwana kune zvikumbiro zvinoda dhigirii yepamusoro yekurongeka kana kunzwa.
B: Kutsamira pane magetsi ekupa:Kuti iyo 4-20mA chiratidzo chifambiswe nenzira kwayo, zvakakosha kuchengetedza nguva dzese kuburikidza nechiuno.Izvi zvinoda simba rekupa, iyo inogona kuva imwe mari uye yakaoma muhurongwa.Mukuwedzera, magetsi anogona kukundikana kana kukanganisa, izvo zvinogona kukanganisa kutapurirana kwechiratidzo che 4-20mA.
5.) Mhedziso
4-20mA kubuda imhando inoshandiswa zvakanyanya yechiratidzo mumaindasitiri otomatiki masisitimu.Inotapurirwa ichishandisa inogara iripo ye4-20mA uye inogashirwa uchishandisa yazvino loop ine inotapurirana uye inogamuchira.4-20mA inobuda ine akati wandei mabhenefiti, anosanganisira kureba-masaini kutapurirana, yakakwirira ruzha kusadzivirirwa, uye kuenderana neakasiyana emidziyo.Nekudaro, ine zvakare zvimwe zvinokanganisa, zvinosanganisira kushomeka kugadzirisa uye kutsamira pane magetsi.Pakazere, iyo 4-20mA inobuda inzira yakavimbika uye yakasimba yekufambisa data mumaindasitiri otomatiki masisitimu.
Ndeupi Musiyano Pakati pe4-20ma, 0-10v, 0-5v, uye I2C Output?
4-20mA, 0-10V, uye 0-5V ese masaini eanalogi anowanzo shandiswa mumaindasitiri otomatiki uye mamwe maapplication.Iwo anoshandiswa kufambisa ruzivo nezve kuyerwa kwehuwandu hwemuviri, senge kudzvanywa, tembiricha, kana kuyerera.
Musiyano mukuru pakati pemhando idzi dzezviratidzo ndeye huwandu hwehukoshi hwavanogona kutumira.4-20mA zviratidzo zvinotapudzwa zvichishandiswa nguva dzose ye 4-20 milliamps, 0-10V zviratidzo zvinotumirwa kuburikidza nemagetsi kubva ku 0 kusvika ku10 volts, uye 0-5V zviratidzo zvinotumirwa uchishandisa magetsi kubva ku0 kusvika ku5 volts.
I2C (Inter-Integrated Circuit) idhijitari yekutaurirana protocol inoshandiswa kufambisa data pakati pemidziyo.Inowanzo shandiswa mumasisitimu akaiswa uye mamwe maapplication uko akawanda maturusi anoda kutaurirana.Kusiyana nemasaini eanalogi, ayo anofambisa ruzivo seanoenderera emhando yehukoshi, I2C inoshandisa akatevedzana edhijitari pulses kuendesa data.
Imwe neimwe yeaya marudzi emasaini ine yayo seti yezvakanakira uye zvayakaipira, uye yakanakisa sarudzo inoenderana nezvinodiwa chaizvo zvekushandisa.Semuenzaniso, 4-20mA masiginecha anowanzo kufarirwa kufambisa kwemasaini kureba uye yakakwirira ruzha kusadzivirirwa, nepo 0-10V uye 0-5V masiginecha anogona kupa yakakwirira resolution uye zvirinani kunyatso.I2C inowanzo shandiswa kutaurirana-kureba-pfupi pakati penhamba shoma yemidziyo.
1. Kuwanda kwehunhu:4-20mA masiginecha anofambisa ikozvino kubva pa4 kusvika ku20 milliamp, 0-10V masiginecha anofambisa voltage kubva pa0 kusvika 10 volts, uye 0-5V masiginecha anofambisa voltage kubva pa0 kusvika 5 volts.I2C idhijitari yekutaurirana protocol uye haifambisi inoenderera tsika.
2. Chiratidzo chekufambisa:4-20mA uye 0-10V masiginecha anofambiswa uchishandisa yazvino loop kana voltage, zvichiteerana.0-5V masaini anofambiswa zvakare uchishandisa voltage.I2C inotapurirwa uchishandisa akatevedzana edhijitari pulses.
3. Kugarisana:4-20mA, 0-10V, uye 0-5V zvikwangwani zvinowanzoenderana nemidziyo yakawanda, sezvo ichishandiswa zvakanyanya mumaindasitiri otomatiki uye mamwe maapplication.I2C inonyanya kushandiswa mumasisitimu akaiswa uye mamwe maapplication uko akawanda maturusi anoda kutaurirana.
4. Chisarudzo:4-20mA zvikwangwani zvine sarudzo shoma nekuda kwehuwandu hushoma hwehukoshi hwavanogona kufambisa (chete 16mA).0-10V uye 0-5V masiginecha anogona kupa kukwidziridzwa kwepamusoro uye kunyatsoita zviri nani, zvichienderana nezvinodiwa chaizvo zvekushandisa.I2C idhijitari protocol uye haina gadziriso nenzira imwechete iyo masaini eanalogi anoita.
5. Noise immunity:4-20mA masiginecha anopokana zvakanyanya neruzha uye kukanganisa nekuda kwekushandisa yazvino loop yekutapurirana chiratidzo.0-10V uye 0-5V masiginecha anogona kunyanya kubatwa neruzha, zvichienderana nekuitwa chaiko.I2C inowanzo ramba ruzha sezvo inoshandisa madhijitari pulses kutapurirana kwechiratidzo.
Ndeipi inonyanya kushandiswa?
Ndeipi yakanakisa yekubuda sarudzo yekushisa uye humidity transmitter?
Zvakaoma kutaura kuti ndeipi sarudzo yekubuda ndiyo inonyanya kushandiswa kune tembiricha uye humidity transmitters, nekuti zvinoenderana nehurongwa hwekushandisa uye zvinodiwa.Nekudaro, 4-20mA uye 0-10V inoshandiswa zvakanyanya kufambisa tembiricha uye humidity zviyero mumaindasitiri otomatiki uye mamwe maapplication.
4-20mA isarudzo yakakurumbira kune tembiricha uye humidity transmitters nekuda kwekusimba kwayo uye kureba kwekufambisa kwekutapurirana.Iyo inopesanawo neruzha uye kukanganisa, izvo zvinoita kuti ive yakakodzera kushandiswa munzvimbo dzine ruzha.
0-10V imwe sarudzo inoshandiswa zvakanyanya kune tembiricha uye humidity transmitters.Inopa kugadzirisa kwepamusoro uye kurongeka kuri nani pane 4-20mA, iyo inogona kuve yakakosha mumashandisirwo anoda kurongeka kwepamusoro.
Pakupedzisira, iyo yakanakisa yekuburitsa sarudzo yekushisa uye humidity transmitter zvinoenderana nezvinodiwa chaizvo zvekushandisa.Zvinhu kune chinhambwe pakati peanotumira uye anogamuchira, mwero wekurongeka uye kugadzirisa kunodiwa, uye nharaunda yekushanda (semuenzaniso, kuvapo kweruzha uye kupindira).
Chii Chikuru Chekushandisa kwe4-20mA Kubuda?
4-20mA inobuda inoshandiswa zvakanyanya muindasitiri otomatiki uye mamwe maapplication nekuda kwekusimba kwayo uye kureba kwekutapurirana nhanho.Mamwe maapplication akajairika e4-20mA kubuda anosanganisira:
1. Kudzora Maitiro:4-20mA inowanzo shandiswa kufambisa maitiro akasiyana, senge tembiricha, kudzvanywa, uye kuyerera mwero, kubva kuma sensors kuenda kune controller mune process control system.
2. Industrial Instrumentation:4-20mA inowanzoshandiswa kuendesa kuyerwa data kubva kumaindasitiri zviridzwa, senge kuyerera kwemamita uye nhanho sensors, kune vanodzora kana kuratidza.
3. Kuvaka otomatiki:4-20mA inoshandiswa mukuvaka otomatiki masisitimu kufambisa ruzivo nezve tembiricha, humidity, uye mamwe mamiriro ezvakatipoteredza kubva kuma sensors kuenda kune controller.
4. Kugadzira Simba:4-20mA inoshandiswa mukugadzira magetsi zvidyarwa kuendesa kuyerwa data kubva kuma sensors uye zviridzwa kune zvinodzora uye zviratidziro.
5. Mafuta neGasi:4-20mA inowanzoshandiswa muindasitiri yemafuta uye gasi kuendesa kuyerwa data kubva kuma sensors uye zviridzwa mumapuratifomu ekumahombekombe uye mapaipi.
6. Kugadziriswa kweMvura neMvura:4-20mA inoshandiswa mumvura uye marara ekurapa zvidyarwa kuendesa kuyerwa data kubva kune sensors uye zviridzwa kune zvinodzora uye zviratidziro.
7. Zvokudya uye Zvinwiwa:4-20mA inoshandiswa muindasitiri yechikafu nechinwiwa kuendesa kuyerwa data kubva kuma sensors uye zviridzwa kune zvinodzora uye zviratidziro.
8. Motokari:4-20mA inoshandiswa muindasitiri yemotokari kuendesa kuyerwa data kubva kuma sensors uye zviridzwa kune zvinodzora uye zviratidziro.
Iwe unofarira kudzidza zvakawanda nezve yedu 4-20 tembiricha uye humidity transmitter?Bata nesu neemailka@hengko.comkuti mibvunzo yako yese ipindurwe uye kuti uwane rumwe ruzivo nezve chigadzirwa chedu.Tiri pano kuti tikubatsire kuita sarudzo yakanaka kune zvaunoda.Usazeze kutaura nesu - tinotarisira kunzwa kubva kwauri!
Nguva yekutumira: Jan-04-2023
