Yuav ua li cas Ultrasonic Dej Meters Ua Haujlwm

Cov khoom tseem ceeb ntawm lub ntsuas dej ultrasonic muaj xws li ultrasonic transducer (transmitter thiab receiver). Thaum ultrasonic tsis propagate raws cov kev taw qhia ntawm dej ntws, lawv propagation ceev nce; conversely, tiv thaiv cov kev taw qhia ntawm dej ntws, lawv propagation ceev txo. Los ntawm kev sib piv lub sijhawm nthuav tawm ntawm ultrasonic tsis nrog thiab tawm tsam qhov ntws, cov dej ntws nrawm tuaj yeem suav tau. Raws li qhov nrawm nrawm no thiab tus ntoo khaub lig- ntu ntu ntawm cov yeeb nkab, tus nqi ntws tuaj yeem txiav txim siab.