Ukuqonda ukuchaneka okuphantsi kweeDoppler Ultrasonic Flowmeters

I-Doppler ii-flowmeters ze-ultrasonicukubazifumene izicelo kwiindidi ezahlukeneyo zamashishini zokulinganisa ukuhamba kwamanzi. Nangona kunjalo, xa kuthelekiswa nezinye iiteknoloji zokulinganisa ukuhamba kwamanzi, zihlala zibonisa ukuchaneka okuphantsi. Eli nqaku lijonga izinto eziphambili ezinegalelo kule ngxaki.

IiDoppler ultrasonic flowmetersingxeloy malunga nokuba kukho amasuntswana abonakalisayo kulwelo olulinganiswayo. Ukuze kulinganiswe ngokuchanekileyo, kufuneka uxinaniso olwaneleyo nolulinganayo lwamasuntswana. Kwiimeko ezininzi zehlabathi lokwenyani, ukugcina usasazo oluhambelanayo lwamasuntswana kuyinselele. Umzekelo, kwizityalo zonyango lwamanzi, uxinaniso lwezinto eziqinileyo ezixhonyiweyo lunokwahluka kakhulu ngokuxhomekeke kwinqanaba lenkqubo yonyango. Ukuba uxinaniso lwamasuntswana luphantsi kakhulu, isignali ye-ultrasonic eboniswa kwi-transducer inokuba buthathaka kakhulu, nto leyo ekhokelela ekubalweni kwesantya sokuhamba kwamanzi okungachanekanga. Ngokwahlukileyo koko, ukuba uxinaniso luphezulu kakhulu, ukuphazamiseka kwesignali kunokwenzeka, kuphazamise iziphumo zokulinganisa.

Ubungakanani kunye nohlobo lwee-particles ezibonisa ukukhanya nazo zidlala indima ebalulekileyo. Utshintsho lwe-Doppler kwisignali ye-ultrasonic lunovelwano kubungakanani bee-particles. Ii-fluids ezahlukeneyo ziqulathe ii-particles ezinobukhulu obahlukeneyo, kwaye ukuba ukusasazwa kobukhulu bee-particle akukho kuluhlu olufanelekileyo loyilo lwe-flowmeter, kuya kuvela iimpazamo zokulinganisa. Umzekelo, kwinkqubo yokupholisa yemizi-mveliso, ubukho bee-particles ezinkulu nezincinci bunokubangela ukubonakaliswa okungahambelaniyo, okwenza kube nzima kwi-flowmeter ukumisela ngokuchanekileyo isantya sokuhamba esiqhelekileyo.

Ukuhamba kolwelo kwiipayipi akuqhelekanga ukuba kuhle. Ukuxinana kunye nokuqhekeka zizinto eziqhelekileyo, ngakumbi kwiipayipi ezinee-bends, ii-valve, okanye utshintsho olukhawulezileyo kwindawo enqamlezileyo. Ii-Doppler ultrasonic flowmeters zithatha iprofayili yokuhamba efanayo kwi-cross-section yepayipi. Nangona kunjalo, xa kukho ukuxinana, isantya sokuhamba siyahluka kakhulu kwiindawo ezahlukeneyo ngaphakathi kwipayipi. Oku kuthetha ukuba isignali ye-ultrasonic isenokungabonisi ngokuchanekileyo isantya sokuhamba esiqhelekileyo, nto leyo ekhokelela ekungachanekini kokulinganisa. Kwisityalo se-petrochemical, umzekelo, iipayipi ezithwala ulwelo oluxineneyo zihlala zifumana iipatheni zokuhamba ezintsonkothileyo ngenxa ye-viscosity ephezulu kunye nobukho bezixhobo, okwenza kube nzima kwii-Doppler flowmeters ukubonelela ngokufundwa okuchanekileyo.

Ukungalingani kokuhamba kwamanzi nako kunokunceda ekuchanekeni okuphantsi. Ukuba ukuhamba kwamanzi akusasazwanga ngokulinganayo kumbhobho, i-Doppler flowmeter isenokungachaneki kakuhle isantya sokuhamba kwamanzi. Umzekelo, kumbhobho apho kukho ukuvaleka okungaphelelanga kwelinye icala, ukuhamba kwamanzi kuya kujikajika, kwaye umlinganiselo we-flowmeter osekelwe ekucingeni kokulingana kwamanzi uya kuba ungachanekanga.

IiDoppler ultrasonic flowmeterszi-vulifanelekile kwimithombo yengxolo yangaphandle. Ukuphazamiseka kombane okuvela kwizixhobo ezikufutshane, ezinje ngeemoto, iitransformer, okanye ezinye izixhobo zombane, kunokuphazamisa isignali ye-ultrasonic. Kwiindawo zoshishino, apho kukho inani elikhulu lezixhobo zombane ezikufutshane, olu kuphazamiseka lunokuba yingxaki enkulu. Ukongeza, ukungcangcazela koomatshini okuvela kwiimpompo okanye kwezinye izixhobo kunokuchaphazela ukusebenza kwe-flowmeter ngokufaka ingxolo engafunekiyo kwinkqubo yokulinganisa.

Ubukho bemiqobo okanye utshintsho kwizinto zombhobho kunokubangela ukubonakaliswa kwe-acoustic kunye nokurhawuzelelwa. Xa isignali ye-ultrasonic idibana notshintsho kwizinto zodonga lombhobho okanye isakhiwo sangaphakathi, inxalenye yesignali inokubonakaliswa okanye irhawuzelelwe, igqwethe isignali yokuqala kwaye ikhokelele ekulinganisweni kwesantya sokuhamba kwamanzi ngendlela engachanekanga. Umzekelo, kumbhobho onophahla okanye umgca wento eyahlukileyo, isignali ye-ultrasonic isenokungasasazeki njengoko bekulindelwe, nto leyo ekhokelela kwiimpazamo zokulinganisa.

Ukuqukumbela, ukuchaneka okuphantsi kweDoppu-lerii-flowmeters ze-ultrasonicinokubangelwa yiindibaniselwano yezinto ezinxulumene neempawu zeesuntswana, iiprofayili zokuhamba ezintsonkothileyo, kunye nokuphazamiseka kwesignali. Ukuqonda ezi zinto kubalulekile kwiinjineli kunye nabaqhubi ukuze benze izigqibo ezinolwazi malunga nokusetyenziswa kweeDoppler flowmeters kunye nokuthatha amanyathelo afanelekileyo ukunciphisa impembelelo yale mida.