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research-article

SELF-EXCITING WIRE TRANSDUCER FOR TIME-VARYING STRAIN MEASUREMENTS

[+] Author and Article Information
Grzegorz Cieplok

Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
cieplok@agh.edu.pl

1Corresponding author.

ASME doi:10.1115/1.4040668 History: Received July 16, 2017; Revised June 22, 2018

Abstract

The solution of the system exciting wire vibrations of the wire sensor allowing to perform time variable measurements, including rapidly changing and of a chaotic nature, are presented in the hereby paper. The system is based on the typical two-coil solution, in which one of the coils is responsible for exciting wire vibrations while the other one for recording these vibrations. The task of maintaining not fading-away natural vibrations of the wire, was solved by the excitation of self-exciting vibrations by means of the impulse system synchronized by the wire motion velocity. The mathematical analysis of the wire motion in the system with the impulse generator, in which the existence of the limiting cycle of the wire natural frequency was proved, is shown in this paper. The computer simulation results, illustrating metrological possibilities of the solution as well as the example of the physical implementation, are also presented.

Copyright (c) 2018 by ASME
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