Title :
Actively generated noise liquid flowmeter
Author :
TANISAWA, Shigeru ; Hirose, Haruo ; Yoshihisa, Nobuyuki
Author_Institution :
Nippon Inst. of Technol., Saitama, Japan
Abstract :
A new noise flowmeter with two transducers has been tested experimentally in water. It detects the noises generated by the interaction between artificially introduced air bubbles and a built-in obstacle with a downstream transducer, and differentiates them from the external noises detected by the upstream transducer in a pipe. The system includes processing instrumentation with functions such as averaging and difference-operating for reduction of external noise effects.<>
Keywords :
acoustic noise; bubbles; flow measurement; flowmeters; underwater sound; actively generated noise liquid flowmeter; artificially introduced air bubbles; built-in obstacle; difference-operating; downstream transducer; external noises; external noises detection; noise flowmeter; processing instrumentation; transducers; upstream transducer; water; Acoustic noise; Acoustic transducers; Fluid flow measurement; Instruments; Noise generators; Noise level; Noise reduction; Noise shaping; Stability; Testing;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
