Kev hais lus dav dav, kev tsim kho ntawm lub flowmeter muaj peb lub ntsiab lus: ntu kev ntsuas, ntu hloov dua siab tshiab, thiab ntu tso zis. Cov txheej txheem sib txawv yog ua raws li cov txheej txheem kev thov tshwj xeeb thiab cov kua dej.
Kev tsim kho ntawm mechanical flowmeters yog qhov ncaj ncaj, feem ntau suav nrog ib lub vaj tsev, cov dej ntws, thiab cov khoom txav. Piv txwv li, lub turbine flowmeter nta ib lub impeller sab hauv; Raws li cov kua ntws los ntawm, nws tsav lub impeller kom tig, thiab qhov kev sib hloov ceev no tom qab hloov mus rau hauv cov teeb liab ntws ntawm electromagnetic induction lossis photoelectric ntsiab. Iav flowmeters, conversely, ntsuas cov kua ntim los ntawm kev saib xyuas kev sib hloov ntawm ob lub zog sib cuam tshuam. Cov chav kawm ntawm cov qauv no muab qhov tseem ceeb ntawm cov khoom siv kho kom haum precision thiab kev ua haujlwm ruaj khov.
Kev tsim kho ntawm lub tshuab electromagnetic flowmeter feem ntau muaj lub raj ntsuas, electrodes, excitation coils, thiab liner. Sab hauv phab ntsa ntawm lub ntsuas raj yog feem ntau lined nrog cov khoom siv insulating; cov excitation coils tsim ib qho chaw sib nqus, thiab raws li cov kua dej conductive ntws los ntawm daim teb no, ib qho hluav taws xob induced yog generated ntawm electrodes, yog li ua kom pom kev txaus. Cov qauv tsim no tsis muaj qhov txav txav, ua rau nws tsim nyog rau kev ntsuas cov dej uas muaj impurities.
Ultrasonic flowmeters yog tsim nyob ib ncig ntawm cov tub ntxhais sib dhos uas muaj cov transducers, lub teeb liab ua haujlwm, thiab cov hlua txuas. Los ntawm muab tso rau ultrasonic probes sab nraud ntawm cov yeeb nkab saum npoo los yog sab hauv hauv cov yeeb nkab, cov khoom siv no ua tiav tsis yog -kev ntsuas ntawm cov dej tawm. Lawv cov qauv tsim kom txo qis kev cuam tshuam nrog cov kav dej thiab ua rau lawv haum rau ntau yam kev ua haujlwm. Tsis tas li ntawd, cov flowmeters niaj hnub no feem ntau sib koom ua ke cov zaub modules, kev sib txuas lus sib txuas lus, thiab cov khoom siv hluav taws xob, ua rau lawv muaj peev xwm ua tau zoo digital thiab ntse.
