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Simultaneous measurements of dynamic values using the transit time method

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3 Author(s)
Daubaris, G. ; Kaunas Univ. of Technol., Lithuania ; Kausinis, S. ; Ragauskas, A.

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

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Instrumentation and Measurement, IEEE Transactions on  (Volume:41 ,  Issue: 2 )