Puas yog lub ultrasonic flowmeter ntsuas tau qhov tseeb thaum qhov nruab nrab ntws ceev hauv cov kav dej qis heev (piv txwv li, <0.1 m / s) lossis siab heev (piv txwv li, > 10 m / s)?

Nyob rau theem no, cov dej ntws nruab nrab nyob ze rau cov dej ntws laminar, nrog rau kev faib tawm ntawm qhov ceev tsis sib xws. Cov ntsuas dej ntws ib txoj kev, uas tsuas yog ntsuas qhov ceev ntawm qhov chaw nruab nrab ntawm cov yeeb nkab, yuav pom lawv qhov yuam kev hloov pauv nthuav dav ntawm ± 1% mus rau ntau dua ± 3%. Qhov sib piv, cov ntsuas dej ntws ntau txoj kev tuaj yeem tswj tau qhov tseeb ntawm ± 0.5% txog ± 1% los ntawm kev ntsuas qhov ceev ntawm ntau qhov chaw thiab xam qhov nruab nrab hnyav. Txawm li cas los xij, nws yog qhov tsim nyog los xaiv "hom kev ntws qis qis tshwj xeeb" (nrog rau kev ua kom lub teeb liab siab dua).

Kev ntws ceev ceev feem ntau tsim cov suab nrov turbulent, thiab qhov sib txawv ntawm lub sijhawm ntawm ultrasonic nthwv dej kis tau me dua (ua rau nws nyuaj rau ntes tau qhov tseeb), uas yuav ua rau muaj kev hloov pauv ntawm kev ntws tam sim ntawd. Nws yog qhov yuav tsum tau xaiv lub "high-frequency sampling type" flowmeter (nrog rau qhov zaus sampling ≥ 100 Hz) thiab xyuas kom meej tias muaj kev sib txuas zoo ntawm lub sensor thiab cov kav dej (kom txo qhov kev cuam tshuam kev co).