Experiments were undertaken to investigate the feasibility of using propagating ultrasonic waves to find the speed of sound and density of solutions contained in opaque, sealed containers. A portable design is proposed which consists of 3 ultrasonic transducers aligned on a single plane along the surface of a tank. The content is then
examined by measuring the time it takes for a signal to reflect off the back wall of the tank and return to another transducer. This time domain response approach delivered a very accurate analysis, with a low spread of results.
This report demonstrates that by using this technique, very small changes in density can be observed. The final error in the density has been found to be less than 2%, which is adequate to reliably tell the difference between salt and fresh water.
DZBIKOWICZ Zdzislaw;
HOWELL John;
JANSSENS-MAENHOUT Greet;
ROWELL W;
2011-02-01
Office for Official Publications of the European Communities
JRC36916
978-92-79-19318-7,
1018-5593,
EUR 22740 EN,
OP LB-NA-22740-EN-C,
https://publications.jrc.ec.europa.eu/repository/handle/JRC36916,
10.2788/50704,
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