CROSS CORRELATION FLOWMETERS WITH AE SENSORS

P. Beneš

Abstract

This paper is concerned on the new type of the sensing elements for a particle volume of flow rate measurements based on cross correlation flowmeters. The new type of sensing elements exploit the fact that the solid particles being carried by a flowing air and impacting a properly formed obstacle generate an acoustic surface wave (acoustic emission - AE). The acoustic signal is indicated by the aid of a high sensitive transducer, which converts the acoustic signal to an electric one. If we use two sensing elements in the flow channel with defined distance, we may use cross correlation technique for calculating transit time and then from time and distance of obstacles the speed of particles.

Keywords

Cross correlation flowmeters, acoustic emission, speed of particles

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IMEKO-WC-2000-TC9-P233.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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