Umphumela we-Ultrasonic Flowmeters

1. Izimpawu Zokuphuma ze-Analog

Imiphumela ye-analog evame kakhulu evela ku-ama-flowmeter e-ultrasonicyizibonakaliso zamanje ezingu-4 - 20 mA kanye nezibonakaliso ze-voltage ezingu-0 - 5V/0 - 10V. I-loop yamanje engu-4 - 20 mA ithembeke kakhulu futhi ayiphazamiseki ekuphazamisekeni kukagesi, okwenza kube kuhle kakhulu ekudlulisweni kwebanga elide ezindaweni zezimboni. I-current engu-4 mA ihambisana nokugeleza okungu-zero, kanti i-20 mA ikhombisa izinga lokugeleza eliphezulu kakhulu elitholakala ku-i-flowmeterilinganiswe kahle. Isibonelo, esitshalweni sokwelapha amanzi, lesi siginali esingu-4 - 20 mA singafakwa ngqo kusilawuli se-logic esihleliwe (i-PLC) ukulawula ukugeleza kwamanzi ngezinqubo ezahlukene zokwelapha.

Izimpawu ze-voltage, njenge-0 - 5V noma i-0 - 10V, nazo ziyasetshenziswa. Kulula ukuzixhumanisa namadivayisi kagesi afana namakhadi okuthola idatha. Kodwa-ke, zisengozini enkulu yokuphazamiseka lapho kuqhutshwa ikhebula isikhathi eside. Lezi zimpawu zivame ukusetshenziswa ezivivinyweni ezisekelwe elabhorethri noma ezinhlelweni lapho ibanga phakathi kwe-i-flowmeterfuthi idivayisi yokwamukela imfushane.

2. Imiphumela Yedijithali

2.1 Ukuphuma kwe-Pulse

Ama-flowmeter amaningi e-ultrasonic ahlinzeka ngokukhipha kwe-pulse. I-pulse ngayinye imelela ivolumu ethile yoketshezi oludlula ku-flowmeter. Imvamisa yama-pulse ilingana ngqo nesivinini sokugeleza. Isibonelo, uma kukhiqizwa i-pulse eyodwa kuwo wonke ama-milliliters ayi-100 oketshezi, izinga lokugeleza eliphezulu lizoholela emvamisa ephezulu ye-pulse. Lolu hlobo lokukhipha luwusizo ezinhlelweni lapho kudingeka khona ukubalwa okulula kwevolumu yoketshezi, njengasezinhlelweni zokulinganisa ezincane noma kwezinye izinhlelo zokusebenza zokuqapha ukugeleza ezingabizi kakhulu.

2.2 Imiphumela Yokuxhumana Okusheshayo

Izinqubo zokuxhumana ezilandelanayo ezifana ne-RS - 485, RS - 232, kanye ne-Modbus nazo ziyimiphumela evamile yedijithali. I-RS - 485 ivumela ukuxhumana okunama-multi-drop, okuvumela ama-flowmeter amaningi ukuthi axhunywe kusilawuli esisodwa ebhasini elilodwa. Inebanga elide lokuxhumana futhi ingaphatha ukudluliswa kwedatha okusheshayo. I-Modbus, ngakolunye uhlangothi, iyinqubo eyamukelwa kabanzi emkhakheni we-automation yezimboni. Inikeza indlela ejwayelekile yokuxhumana idatha phakathi kwamadivayisi ahlukene. Nge-Modbus,ama-flowmeter e-ultrasonicingathumela ulwazi oluningiliziwe njengesilinganiso sokugeleza, ivolumu iyonke, kanye nesimo sedivayisi ohlelweni lokulawula oluphakathi. Lokhu kuzuzisa kakhulu ezitshalweni ezinkulu zezimboni lapho ukuqapha nokulawula amapharamitha amaningi okugeleza ngesikhathi sangempela kuyadingeka.

3. Ukulinganisa Okuphumayo Nokunemba

Ukunemba komphumela ovela ku-i-flowmeter ye-ultrasonickuncike ekulinganisweni okufanele. Abakhiqizi bavame ukuhlinzeka ngezinto zokulinganisa ezisetshenziselwa ukuguqula izimpawu zokukhipha ezingavuthiwe (njengezilinganiso zesikhathi sokundiza zama-flowmeter e-ultrasonic) zibe yizinga lokugeleza elinengqondo noma amanani evolumu. Ukuhlolwa kokulinganisa okuvamile kubalulekile ukuqinisekisa ukuthi umphumela uhlala unembile ngokuhamba kwesikhathi. Izinto ezifana nezinguquko ezakhiweni zoketshezi (njenge-viscosity noma izinga lokushisa), ukuguguleka kwezingxenye ze-flowmeter, kanye nezimo zemvelo kungathinta ukunemba komphumela. Ngokulinganisa i-flowmeter njalo nokulungisa umphumela ngokusekelwe emiphumeleni yokulinganisa, idatha yokulinganisa ukugeleza ethembekile nenembile ingatholakala.

Ekuphetheni, imiphumela ye-ama-flowmeter e-ultrasonicziyahlukahluka futhi zifeza izinjongo ezahlukene ezinhlelweni ezahlukene. Kungakhathaliseki ukuthi isignali ye-analog yokulawula okulula, ukuphuma kwe-pulse kokubala ivolumu eyisisekelo, noma ukuphuma kokuxhumana kwe-digital serial kokuhlanganiswa kwedatha eyinkimbinkimbi, ukuqonda lezi ziphumelo kubalulekile ukuze kusetshenziswe ubuchwepheshe be-ultrasonic flowmeter ngokugcwele.