Umgaqo-nkqubo wexesha lokuhamba
Umgaqo woMlinganiso:
I-Transit-time Correlation Principle isebenzisa into yokuba ixesha lokuhamba kwesibonakaliso se-ultrasonic sichatshazelwa yi-velocity ye-carrier medium.Njengendadi ewela umlambo oqukuqelayo, umqondiso weultrasonic uhamba kancinci unyusa umsinga kunomsinga.
YethuTF1100 ultrasonic flow meterssebenza ngokwalo mqathango wexesha lokuhamba:
Vf = Kdt/TL
Apho:
Isantya seVcFlow
K: Qho
dt: Umahluko kwixesha lokubhabha
I-TL: Ixesha lokuThutha ngomsindo
Xa imitha yokuhambahamba isebenza, ii-transducer ezimbini zithumela kwaye zifumane imiqondiso ye-ultrasonic eyandiswe yi-multi beam ehamba kuqala ezantsi ngomsinga ize inyuke.Ngenxa yokuba isandi esiphakamileyo sihamba ngokukhawuleza ezantsi kunomlambo, kuya kubakho umahluko wexesha lokubhabha (dt).Xa ukuhamba kumile, umahluko wexesha (dt) ngunothi.Ngoko ke, ukuba nje sisazi ixesha lokuhamba ngenqwelomoya ezantsi kunye naphezulu, sinokusebenza umahluko wexesha, kunye nesantya sokuhamba (Vf) kusetyenziswa le fomula ilandelayo.
V indlela
W indlela
Z indlela
Umgaqo wokusebenza weDoppler
IDF6100Uchungechunge lwe-flowmeter lusebenza ngokusasaza isandi se-ultrasonic ukusuka kwi-transducer yokuhambisa, isandi siya kubonakaliswa zizibonisi eziluncedo ze-sonic ezixhonywe ngaphakathi kolwelo kwaye zirekhodwe yi-transducer eyamkelayo.Ukuba izibonisi ze-sonic zihamba ngaphakathi kwendlela yokuhambisa isandi, amaza omsindo aya kubonakaliswa kwi-frequency shifted (i-Doppler frequency) ukusuka kwi-frequency transmitted frequency.Ukutshintshwa kwi-frequency kuya kuhambelana ngokuthe ngqo kwisantya se-particle ehambayo okanye i-bubble.Olu tshintsho lokuphindaphinda lutolikwa sisixhobo kwaye luguqulelwe kwiiyunithi ezahlukeneyo zokulinganisa ezichazwe ngumsebenzisi.
Kufuneka kubekho amasuntswana amakhulu ngokwaneleyo ukuze abangele ukubonakaliswa kwe-longitudinal - amasuntswana amakhulu kune-100 micron.
Xa ufaka ii-transducers, indawo yofakelo kufuneka ibe nobude obaneleyo bombhobho othe ngqo phezulu nasezantsi.Ngokuqhelekileyo, i-upstream ifuna i-10D kunye ne-downstream idinga ubude be-5D obuthe ngqo bombhobho, apho i-D iyidayamitha yombhobho.
Umgaqo wesantya sokusebenza kwendawo
DOF6000uchungechunge oluvulekileyo lwemitha yokuhamba kweshaneli lusebenzisa i-Continuous Mode Doppler ukubona isantya samanzi, isibonakaliso se-ultrasonic sidluliselwa emanzini kunye ne-echoes (i-reflections) ebuyisiwe kwiinqununu ezimisiwe ekuhambeni kwamanzi zifunyenwe kwaye zihlalutye ukukhupha i-Doppler shift (isantya).Ukuhanjiswa kuyaqhubeka kwaye kwangaxeshanye kunye nokwamkelwa kwesignali ebuyisiweyo.
Ngexesha lomjikelo wokulinganisa i-Ultraflow QSD 6537 ikhupha isignali eqhubekayo kunye nemiqondiso yemilinganiselo ebuyayo ukusuka kwi-scatterers naphi na naphi na ecaleni komqadi.Oku kusonjululwa kwisantya esiphakathi esinokunxulumana nesantya sokuhamba komjelo kwiindawo ezifanelekileyo.
Ummkeli kwisixhobo ufumanisa imiqondiso ebonakalisiweyo kwaye ezo zibonakaliso zihlalutywa kusetyenziswa iindlela zokucwangcisa uphawu lwedijithali.
Umlinganiselo wobunzulu bamanzi - Ultrasonic
Ukulinganisa ubunzulu I-Ultraflow QSD 6537 isebenzisa iTime-of-Flight (ToF) Umbala.Oku kubandakanya ukuhambisa ukuqhuma kwesibonakaliso se-ultrasonic phezulu kumphezulu wamanzi kunye nokulinganisa ixesha elithathiweyo le-echo ukusuka kumphezulu ukuba lifunyenwe sisixhobo.Umgama (ubunzulu bamanzi) ulingana nexesha lokuhamba kunye nesantya sesandi emanzini (ukulungiswa kobushushu kunye nokuxinana).
Ubungakanani obunzulu be-ultrasonic measuremnt bukhawulelwe kwi-5m.
Umlinganiselo wobunzulu bamanzi – Uxinzelelo
Iindawo apho amanzi anezixa ezikhulu zobutyobo okanye amaqamza omoya asenokungafanelanga ukulinganisa ubunzulu be-ultrasonic.Ezi ndawo zifaneleke ngcono ukusebenzisa uxinzelelo ukumisela ubunzulu bamanzi.
Umlinganiselo wobunzulu obusekelwe kuxinzelelo unokusebenza nakwiindawo apho isixhobo singenako ukufumaneka kumgangatho wejelo lokuhamba okanye singenako ukunyuswa ngokuthe tye.
I-Ultraflow QSD 6537 ifakwe i-2 bars inzwa yoxinzelelo olupheleleyo.Isivamvo sibekwe kubuso obusezantsi besixhobo kwaye sisebenzisa iqondo lobushushu obuhlawulelwayo loxinzelelo lwedijithali.
Apho kusetyenziswa abenzi boluvo boxinzelelo obunzulu, ukuhluka koxinzelelo lwe-atmospheric kuya kubangela iimpazamo kubunzulu obubonisiweyo.Oku kulungiswa ngokususa uxinzelelo lwe-atmospheric kuxinzelelo olulinganisiweyo lobunzulu.Inzwa yoxinzelelo lwebarometric iyafuneka ukwenza oku.Imodyuli yembuyekezo yoxinzelelo yakhiwe kwi-Calculator DOF6000 eya kuthi emva koko ibuyekeze ngokuzenzekelayo iiyantlukwano zoxinzelelo lwe-atmospheric iqinisekisa ukuba ubungakanani obuchanekileyo bufunyenwe.Oku kwenza ukuba i-Ultraflow QSD 6537 ichaze ubunzulu bokwenene bamanzi (uxinzelelo) endaweni yoxinzelelo lwebarometric kunye nentloko yamanzi.
Ubushushu
Inzwa yeqondo lokushisa eliqinileyo lisetyenziselwa ukulinganisa ubushushu bamanzi.Isantya sesandi emanzini kunye ne-conductivity yayo ichaphazeleka bubushushu.Isixhobo sisebenzisa ubushushu obulinganisiweyo ukubuyisela ngokuzenzekelayo olu tshintsho.
Ukuhanjiswa koMbane (EC)
I-Ultraflow QSD 6537 ixhotyiswe ngamandla okulinganisa ukuqhutyelwa kwamanzi.I-linear four electrode configuration isetyenziselwa ukwenza umlinganiselo.Umsinga omncinci ugqithiswa emanzini kwaye umbane ophuhliswe ngulo mbane uyalinganiswa.Isixhobo sisebenzisa la maxabiso ukubala i-conductivity ekrwada engalungiswanga.