Iziphumo ze-Ultrasonic Flowmeters

1. Iimpawu ze-Analog Output

Iziphumo ze-analog ezixhaphakileyo ezivelaii-flowmeters ze-ultrasonicziisignali zangoku ze-4 - 20 mA kunye neesignali zevolthi ze-0 - 5V/0 - 10V. Iluphu yangoku ye-4 - 20 mA ithembekile kakhulu kwaye ayichaphazeleki kukuphazamiseka kombane, nto leyo eyenza ukuba ilungele ukuhanjiswa komgama omde kwiindawo zoshishino. I-4 mA yangoku ihambelana nokuhamba kwe-zero, ngelixa i-20 mA ibonisa isantya esiphezulu sokuhamba kwe-i-flowmeterilinganiswe. Umzekelo, kwisityalo sokucoca amanzi, esi siginali ye-4 - 20 mA sinokufakwa ngqo kwi-programmable logic controller (PLC) ukulawula ukuhamba kwamanzi kwiinkqubo ezahlukeneyo zonyango.

Izibonakaliso zevolthi, ezifana ne-0 - 5V okanye i-0 - 10V, nazo ziyasetyenziswa. Kulula ukuzidibanisa nezixhobo ze-elektroniki ezifana namakhadi okufumana idatha. Nangona kunjalo, zichaphazeleka lula xa kuqhutywa iintambo ezinde. Ezi zibonakaliso zihlala zisetyenziswa kuvavanyo olusekwe kwilabhoratri okanye kwiinkqubo apho umgama phakathii-flowmeterkwaye isixhobo sokwamkela sifutshane.

2. Iziphumo zeDijithali

2.1 Isiphumo sePulse

Ii-flowmeter ezininzi ze-ultrasonic zibonelela nge-pulse output. I-pulse nganye imele umthamo othile wolwelo oludlula kwi-flowmeter. I-frequency ye-pulses ihambelana ngokuthe ngqo ne-flow rate. Umzekelo, ukuba i-pulse enye iveliswa kwi-100 milliliters nganye yolwelo, i-flow rate ephezulu iya kubangela i-pulse frequency ephezulu. Olu hlobo lwe-output luluncedo kwizicelo apho kufuneka ukubalwa okulula komthamo wolwelo, njengakwiinkqubo ezincinci zokulinganisa okanye kwezinye izicelo zokujonga ukuhamba kwe-flow ezingabizi kakhulu.

2.2 Iziphumo zoNxibelelwano oluQhelekileyo

Iiprotokholi zonxibelelwano ezilandelanayo ezifana ne-RS - 485, i-RS - 232, kunye ne-Modbus nazo ziimveliso zedijithali eziqhelekileyo. I-RS - 485 ivumela unxibelelwano olune-multi-drop, olwenza ukuba ii-flowmeters ezininzi ziqhagamshelwe kumlawuli omnye kwibhasi enye. Inomgama omde wonxibelelwano kwaye inokusingatha ukudluliselwa kwedatha ngesantya esiphezulu. I-Modbus, kwelinye icala, yiprotokholi eyamkelweyo ngokubanzi kwicandelo le-automation yezimboni. Ibonelela ngendlela eqhelekileyo yokunxibelelana ngedatha phakathi kwezixhobo ezahlukeneyo. Nge-Modbus,ii-flowmeters ze-ultrasonicingathumela ulwazi oluneenkcukacha ezifana nesantya sokuhamba kwamanzi, umthamo opheleleyo, kunye nesimo sesixhobo kwinkqubo yolawulo oluphakathi. Oku kuluncedo kakhulu kwizityalo ezinkulu zoshishino apho kufuneka khona ukujonga nokulawula iiparameter ezininzi zokuhamba kwamanzi ngexesha langempela.

3. Ukulinganiswa kweziphumo kunye nokuchaneka

Ukuchaneka kwemveliso evela kwii-ultrasonic flowmeterKuxhomekeke ekulinganisweni okufanelekileyo. Abavelisi badla ngokubonelela ngezinto zokulinganisa ezisetyenziselwa ukuguqula imiqondiso yokukhupha engavuthwanga (ezifana nokulinganisa ixesha lokubhabha kwe-ultrasonic flowmeters) zibe yizinga lokuhamba okanye amaxabiso omthamo anentsingiselo. Ukuhlolwa rhoqo kokulinganisa kubalulekile ukuqinisekisa ukuba imveliso ihlala ichanekile ngokuhamba kwexesha. Izinto ezifana notshintsho kwiimpawu zolwelo (ezifana ne-viscosity okanye ubushushu), ukuguguleka kwamacandelo e-flowmeter, kunye neemeko zokusingqongileyo zinokuchaphazela ukuchaneka kokuphuma. Ngokulinganisa rhoqo i-flowmeter kunye nokulungisa imveliso ngokusekelwe kwiziphumo zokulinganisa, idatha yokulinganisa ukuhamba ethembekileyo nechanekileyo inokufumaneka.

Ukuqukumbela, iziphumo zeii-flowmeters ze-ultrasoniczahlukahlukene kwaye zisebenza ngeenjongo ezahlukeneyo kwizicelo ezahlukeneyo. Nokuba sisignali ye-analog yokulawula okulula, isiphumo se-pulse sokubala ivolumu esisiseko, okanye isiphumo sonxibelelwano lwedijithali sokudibanisa idatha enzima, ukuqonda ezi ziphumo kubalulekile ukuze kusetyenziswe kakhulu itekhnoloji ye-ultrasonic flowmeter.