Simultaneous measurements of dynamic values using the transit time method

Author

Daubaris, Gediminas ; Kausinis, Saulius ; Ragauskas, Arminas

Author_Institution

Kaunas Univ. of Technol., Lithuania

Volume

41

Issue

2

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

251

Lastpage

255

Abstract

The problem of simultaneous and accurate measurements of two dynamic values, time dependencies of flow velocity and ultrasound velocity in the flow, is analyzed. In order to measure two dynamic values simultaneously a theory of the transit time method has developed, and the theoretical model of a microprocessor-based measuring system has been derived. The ways to improve the accuracy and information of such dual-channel measurement systems have been examined. It is shown that invariance between two channels of a measurement system can be achieved when dynamic, nonlinear, parametric models of these channels are identified in real time during the process of measurement, and when the multipulse irradiation of flow is used. The results of computer simulation of transit time method dynamic errors are represented. A method of minimizing these errors has been proposed

Keywords

computerised instrumentation; digital simulation; flow measurement; measurement errors; microcomputer applications; ultrasonic velocity measurement; computer simulation; dual-channel measurement; dynamic errors; dynamic nonlinear parametric method; dynamic values; error minimisation; flow velocity; microprocessor; multipulse irradiation of flow; real time; theoretical model; time dependencies; transit time method; ultrasound velocity; Computer errors; Computer simulation; Fluid flow measurement; Nonlinear dynamical systems; Parametric statistics; Real time systems; Time measurement; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.137356

Filename

137356