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

Content Provider	IEEE Xplore Digital Library
Author	Hirnschrodt, M. Von Jeana, A. Vontz, T. Fischer, B. Lerch, R. Meixner, H.
Copyright Year	1986
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 density of interest 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 frontwave detection. The method presented here is a first step in developing an ultrasonic mass flow meter.
Page Count	10
File Size	2726911
Starting Page	1530
Ending Page	1539
File Format	PDF
ISSN	08853010
Volume Number	47
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resonance Density measurement Ultrasonic variables measurement Liquids Solids Testing Frequency Signal generators Interference Steady-state
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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