Isiphumo seDoppler kwimitha yokuhamba kwe-ultrasonic yinto apho ukuphindaphinda kwesignali ye-ultrasound kutshintsha ngenxa yokuhamba kwamasuntswana okanye ulwelo ngaphakathi kombhobho. Olu tshintsho kwisantya lusetyenziselwa ukumisela isantya solwelo, kwaye ukusuka koku, izinga lokuhamba linokubalwa.
Umgaqo-nkqubo wokusebenza we-Doppler Effect kwi-Ultrasonic Flow Meters:
Kwimitha yokuhamba kwe-ultrasonic esebenzisa isiphumo seDoppler, inkqubo isebenza ngolu hlobo lulandelayo:
Ukudluliselwa kwamaza e-Ultrasonic: Imitha yokuhamba idlulisela amaza e-ultrasound kulwelo nge-transducer.
Ukubonakaliswa kweeParticles: Kwiimeko ezininzi, ulwelo alucocekanga kodwa lunee-particles ezixhonyiweyo, ii-bubbles, okanye ezinye izinto ezingahambelaniyo. Xa amaza e-ultrasonic ebetha ezi particles zishukumayo okanye ii-bubbles, abuyiselwa kwi-transducer.
Utshintsho kwiFrequency: Intshukumo yamasuntswana ibangela ukuba ifrikhwensi yewave ye-ultrasound ebonakalisiweyo itshintshe:
Ukuba ukuhamba kolwelo kuya kwi-transducer, i-frequency ebonakalisiweyo iya kuba phezulu (positive Doppler shift).
Ukuba ukuhamba kolwelo kuyasuka kwi-transducer, i-frequency ebonakalisiweyo iya kuba phantsi (i-negative Doppler shift).
Ukubalwa kotshintsho lweFrequency: Ubungakanani botshintsho lwefriquence buhambelana ngokuthe ngqo nesantya solwelo. Okukhona ulwelo luhamba ngokukhawuleza, kokukhona utshintsho lwefriquence luba lukhulu.
Ukubalwa kweNqanaba lokuHamba: Ngokulinganisa i-Doppler shift nokwazi iipropati zolwelo kunye nejometri yombhobho, imitha yokuhamba inokubala isantya solwelo. Isantya sokuhamba sinokufunyanwa ngokuphindaphinda isantya solwelo ngendawo enqamlezileyo yombhobho.
Izinto EzichaphazelaIsiphumo seDoppler kwiMitha yokuHamba kweUltrasonic:
Uxinaniso lweeParticle: Isiphumo seDoppler sixhomekeke ekubeni kukho amasuntswana (okanye amaqamza) ngaphakathi kolwelo. Ukuba ulwelo lucocekile kakhulu okanye alunazo izinto eziqinileyo ezixhonyiweyo, amaza e-ultrasonic asenokungabonakaliswa ngokwaneleyo, nto leyo ekhokelela ekulinganisweni okungachanekanga okanye okungaphumeleliyo.
Ubungakanani beParticle: Iiparticle ezinkulu okanye amaqamza abonakalisa amaza e-ultrasonic ngempumelelo, nto leyo eyenza kube lula ukubona i-Doppler shift. Iiparticle ezincinci zisenokungavelisi ukubonakaliswa okunamandla ngokwaneleyo ukuba kubonwe yinkqubo.
Iprofayili Yokuhamba: Iprofayili yokuhamba (eyandileyo okanye eyomileyo) inokuchaphazela ukuchaneka komlinganiselo weDoppler. Ngokwesiqhelo, iiDoppler meter zilungele ukuhamba okuyandileyo, apho amasuntswana ahamba ngendlela engacwangciswanga nengacwangciswanga.
Iimpawu zolwelo: Isantya sesandi kulwelo sichaphazela i-Doppler shift. Imitha ingadinga ukulinganiswa kwiintlobo ezithile zolwelo, njengoko isantya sesandi siyahluka ngokuxhomekeke kubuninzi bolwelo, ubushushu, kunye nokwakheka kwalo.
Iintlobo zeIimitha zokuhamba kweDoppler Ultrasonic:
Iimitha zokuhamba kweeDoppler zeClamp-On: Ezi mitha azidingi ukusika umbhobho. Zibambelela ngaphandle kombhobho kwaye zilinganisa ukutshintsha kwamaza e-ultrasonic njengoko edlula kulwelo.
Iimitha zokuhamba kweeDoppler ezikwi-Inline: Ezi mitha zifakwa ngqo kumbhobho, apho izinzwa ze-ultrasonic zithumela kwaye zifumana amaza esandi ngaphakathi kolwelo.
Ixesha leposi: Disemba-31-2024