A Novel Three-Head Ultrasonic System for Distance Measurements Based on the Correlation Method

Measurement Science Review

卷:14

Stręk Anna¹  Gądek Krzysztof²  Dudzik Marek³ 

[1] AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Department of Strength and Fatigue of Materials and Structures, al. A. Mickiewicza 30, 30-059 Krakow, Poland.;

[2] Institute of Industrial Electrical Engineering and Computer Technology, Department of Theoretical Electrical Engineering and Metrology, Faculty of Electrical and Computer Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155, Krakow, Poland.;

[3] Institute of Industrial Electrical Engineering and Computer Technology, Department of Traction and Traffic Control, Faculty of Electrical and Computer Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155, Krakow, Poland.;

关键词: Ultrasonic measurements;    ultrasonic waves;    non-destructive testing;    distance measurements;    cross-correlation;   

DOI  :  10.2478/msr-2014-0045

来源: DOAJ

【 摘 要 】

A novel double-emitter ultrasonic system for distance measurements based on the correlation method is presented. The proposed distance measurement method may be particularly useful in difficult conditions, e.g. for media parameters undergoing fast changes or in cases when obstacles and mechanical interference produce false reflections. The system is a development of a previously studied single-head idea. The present article covers a comparison of the two systems in terms of efficiency and precision. Experimental research described in this paper indicated that adding the second head improved the measurement exactness – standard deviation decreased by 40%. The correlation method is also described in detail, also giving the criterion for the quality of the measurement signal.

【 授权许可】

Unknown