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Related Experiment Video

Updated: Jul 7, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

Actively generated noise liquid flowmeter.

S Tanisawa¹, H Hirose, N Yoshihisa

¹Nippon Inst. of Technol., Saitama.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1994

Summary

This summary is machine-generated.

A novel noise flowmeter uses two transducers to measure fluid flow by detecting bubble-generated noise. This system effectively distinguishes internal flow sounds from external noise for accurate measurements.

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Area of Science:

Fluid dynamics
Acoustic sensing technology

Background:

Traditional flowmeters face challenges with noise interference.
Accurate flow measurement is critical in various industrial applications.

Purpose of the Study:

To introduce and experimentally validate a new noise flowmeter utilizing two transducers.
To assess the system's capability in differentiating flow-generated noise from external noise.

Main Methods:

Experimental testing of a two-transducer noise flowmeter in water.
Utilizing an upstream transducer for external noise detection and a downstream transducer for flow-generated noise.
Employing processing instrumentation with averaging and difference-operating functions for noise reduction.

Main Results:

The noise flowmeter successfully detected noises from air bubbles interacting with an obstacle.
The system demonstrated the ability to differentiate between internal and external noises.
Noise reduction techniques proved effective in minimizing external noise interference.

Conclusions:

The developed noise flowmeter shows promise for accurate fluid flow measurement in noisy environments.
The two-transducer design and signal processing effectively isolate flow-related acoustic signals.
This technology offers a viable alternative for flow monitoring applications.