Umgomo wokusebenza wesikhathi sokuthutha
Isimiso Sokukala:
I-Transit-time Correlation Principle isebenzisa iqiniso lokuthi isikhathi sokundiza kwesignali ye-ultrasonic ithintwa isivinini sokugeleza kwendawo yenethiwekhi.Njengombhukudi owela umfula ogelezayo, isignali ye-ultrasonic ihamba kancane ikhuphuka nomfula.
EyethuTF1100 ultrasonic flow metressebenza ngokwalesi simiso sesikhathi sokuthutha:
Vf = Kdt/TL
Kuphi:
Isivinini se-VcFlow
K: Njalo
dt: Umehluko ngesikhathi sokundiza
I-TL: Isikhathi Sokuhamba Esimaphakathi
Lapho imitha yokugeleza isebenza, ama-transducer amabili adlulisa futhi athole amasignali e-ultrasonic akhuliswa ugongolo oluningi oluhamba luqale phansi nomfula bese lukhuphuka nomfula.Ngenxa yokuthi umsindo omkhulu uhamba ngokushesha uye phansi kunomfula, kuzoba nomehluko wesikhathi sokundiza (dt).Uma ukugeleza kumile, umehluko wesikhathi (dt) unguziro.Ngakho-ke, inqobo nje uma sazi isikhathi sokundiza kokubili phansi nomfula, singakwazi ukuthola umehluko wesikhathi, bese kuba isivinini sokugeleza (Vf) sisebenzisa ifomula elandelayo.
V indlela
W indlela
Z indlela
Isimiso sokusebenza se-Doppler
IDF6100i-series flowmeter isebenza ngokudlulisa umsindo we-ultrasonic ovela ku-transducer yayo, umsindo uzobonakala ngezibonisi eziwusizo ze-sonic ezimiswe ngaphakathi koketshezi futhi zirekhodwe yi-transducer eyamukelayo.Uma izibonisi ze-sonic zihamba ngaphakathi kwendlela yokudlulisa umsindo, amaza omsindo azobonakala kumafrikhwensi ashintshiwe (imvamisa ye-Doppler) ukusuka kufrikhwensi edlulisiwe.Ukushintsha kwemvamisa kuzohlobana ngqo nesivinini sezinhlayiyana ezihambayo noma ibhamuza.Lokhu kushintshwa kwemvamisa kuhunyushwa ithuluzi futhi kuguqulelwe kumayunithi ahlukahlukene wokulinganisa achazwe ngabasebenzisi.
Kumelwe kube nezinhlayiya ezinkulu ngokwanele ukuba zibangele ukubukeka kwe-longitudinal - izinhlayiya ezinkulu kuno-100 micron.
Uma ufaka ama-transducer, indawo yokufaka kufanele ibe nobude obanele bepayipi eliqondile phezulu nomfula.Ngokuvamile, ukuya phezulu kudinga i-10D futhi ezansi nomfula kudinga ubude bepayipi obuqondile obungu-5D, lapho u-D engububanzi bepayipi.
Umgomo wokusebenza kwesivinini sendawo
DOF6000uchungechunge oluvulekile imitha lokugeleza kwesiteshi lisebenzisa i-Continuous Mode Doppler ukuthola isivinini samanzi, isignali ye-ultrasonic idluliselwa ekugelezeni kwamanzi futhi kunanela (imifanekiso) ebuyiswa ezinhlayiyeni ezilengiswe ekugelezeni kwamanzi ziyatholwa futhi zihlaziywe ukuze kukhishwe ukushintsha kwe-Doppler (isivinini).Ukudluliselwa kuyaqhubeka futhi kanyekanye nokwamukela isignali ebuyisiwe.
Phakathi nomjikelezo wokulinganisa i-Ultraflow QSD 6537 ikhipha isignali eqhubekayo futhi ilinganise amasiginali abuya kuma-scatterers noma kuphi nanoma yikuphi eduze komugqa.Lokhu kuxazululwa ngesivinini esingahlotshaniswa nesivinini sokugeleza kwesiteshi ezindaweni ezifanele.
Umamukeli kuthuluzi uthola amasignali abonisiwe futhi lawo masignali ahlaziywa kusetshenziswa amasu okucubungula isignali yedijithali.
Ukulinganisa Ukujula Kwamanzi - I-Ultrasonic
Ukuze uthole isilinganiso sokujula I-Ultraflow QSD 6537 isebenzisa Isikhathi Sokundiza (ToF) Range.Lokhu kuhilela ukudlulisa ukuqhuma kwesignali ye-ultrasonic phezulu phezulu emanzini kanye nokulinganisa isikhathi esithathiwe se-echo esivela phezulu ukuze samukelwe ithuluzi.Ibanga (ukujula kwamanzi) lilingana nesikhathi sokuthutha kanye nesivinini somsindo emanzini (silungiselwe izinga lokushisa nokuminyana).
Isilinganiso esiphezulu sokujula kwe-ultrasonic silinganiselwe ku-5m.
Ukulinganisa Ukujula Kwamanzi - Ingcindezi
Amasayithi lapho amanzi aqukethe inani elikhulu lemfucumfucu noma amabhamuza omoya angase angakufanelekeli ukukala ukujula kwe-ultrasonic.Lezi zindawo zikulungele kangcono ukusebenzisa ingcindezi ukuze kutholakale ukujula kwamanzi.
Ukulinganisa ukujula okususelwe kwingcindezi kungase futhi kusebenze kumasayithi lapho ithuluzi lingatholakali khona phansi esiteshini sokugeleza noma lingakwazi ukukhwezwa ngokuvundlile.
I-Ultraflow QSD 6537 ifakwe inzwa engu-2 ye-absolute pressure sensor.Inzwa itholakala ebusweni obungezansi bensimbi futhi isebenzisa isici sokuzwa ingcindezi yedijithali enxeshezelwe ngezinga lokushisa.
Lapho kusetshenziswa khona izinzwa zengcindezi ejulile ukushintshashintsha komfutho womkhathi kuzodala amaphutha ekujuleni okubonisiwe.Lokhu kulungiswa ngokukhipha ukucindezela komkhathi kukucindezela kokujula okulinganiselwe.Inzwa yokucindezela kwe-barometric iyadingeka ukwenza lokhu.Imojula yesinxephezelo sengcindezi yakhiwe kuSibali se-DOF6000 esizobe sesinxephezela ngokuzenzakalelayo ukuhluka komfutho womoya oqinisekisa ukuthi kufinyelelwa isilinganiso sokujula esinembile.Lokhu kwenza i-Ultraflow QSD 6537 ibike ukujula kwamanzi kwangempela (ingcindezi) esikhundleni sokucindezela kwe-barometric kanye nekhanda lamanzi.
Izinga lokushisa
Inzwa yezinga lokushisa eliqinile isetshenziselwa ukukala izinga lokushisa lamanzi.Ijubane lomsindo emanzini kanye nokuhamba kwawo kuthinteka izinga lokushisa.Ithuluzi lisebenzisa izinga lokushisa elilinganisiwe ukuze linxephezele ngokuzenzakalelayo lokhu kuhluka.
I-Electrical Conductivity (EC)
I-Ultraflow QSD 6537 ifakwe amandla okukala ukuqhutshwa kwamanzi.Ukucushwa kwama-electrode amane aqondile kusetshenziselwa ukwenza isilinganiso.Umsinga omncane udlula emanzini futhi i-voltage eyakhiwe yilo msinga iyalinganiswa.Ithuluzi lisebenzisa lawa manani ukubala i-conductivity engalungiswanga eluhlaza.