Time domain evaluation of resonance antireflection (RAR) signals for ultrasonic density measurement

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16 Citations (Scopus)

Abstract

This paper presents an ultrasonic method for measuring the mass density of liquids with a solid layer separating a reference fluid and a test fluid. By adjusting the frequency of the exciting signal according to the thickness of the layer, it is possible to generate destructive interference of the waves reflected at the first and second boundary of the layer. Thus, the layer appears to vanish for the incident waves. In the steady state the resulting echo signal depends only on the acoustic impedances of the reference fluid and the test fluid and the interesting density can be extracted. Short- and long-term drifts of the electronics and the ultrasonic transducer implied are eliminated by using the well-known pulse-echo technique, with additional front-wave detection. The method presented here is a first step in developing an ultrasonic mass flow meter.

Original languageEnglish
Pages (from-to)1530-1539
Number of pages10
JournalIEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
Volume47
Issue number6
DOIs
Publication statusPublished - Nov 2000

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