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Detection of physical signal and time-frequency analysis owing to the impact on rubber material using a piezoelectric sensor

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Abstract

A signal is primarily generated when two objects collide, with one falling from a specific height and the other disrupting its balance. This signal contains an important component that aids in the diagnosis of material damage. In this work, a piezoelectric thin film sensor made of polyvinylidene fluoride (PVDF) was employed to monitor the impact signal and process the recorded signal. By stacking a left and right piezoelectric film sensor, drop impact experiments were performed on rubber sheet material. The data-acquisition system captured the impact signal, and a signal processing tool was used to assess its performance. To determine the time-frequency domain visibility of the impact signal, the short-time Fourier transform (STFT) and continuous wavelet transform (CWT) were used. The detection of the elastic signal and impact force on the material is suitable for piezoelectric film. A steel impactor strikes a silicon rubber sheet at a speed of 3.43 m/s and exerts an average impact force of 72.6 kN. To make the impact signal more visible, the noise signal can be denoised using a bandpass filter. The continuous wavelet transform has a high time-frequency resolution compared to the short-time Fourier transform. Additionally, the analysis of non-stationary signals is improved by using STFT and CWT approaches. Thus, the elastic signal detection in the material may be recognized using the average total of the signals identified by the sensor.

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Acknowledgments

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MIST) (No. 2018R1A5A7025522).

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Authors and Affiliations

  1. Survivability Signal Intelligence Research Center, Hanyang University, Seongdong-gu, Seoul, 04763, Korea

    Shivashankar Hiremath

  2. Department of Mechanical Engineering, Hanyang University, Seongdong-gu, Seoul, 04763, Korea

    Tae-Won Kim

Authors
  1. Shivashankar Hiremath
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  2. Tae-Won Kim
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Corresponding author

Correspondence to Tae-Won Kim.

Additional information

Shivashankar Hiremath is a research associate at the Survivability Signal Intelligence Research Center, Hanyang University South Korea. He completed his graduate and post-graduate work in the areas of Instrumentation Technology and Space Engineering. He obtained a Doctorate in Material and Mechatronics. His areas of research include the development of sensors and actuators, Mechatronics, MEMS, and composite materials; materials for electronics applications; IIOT and automation; soft robotics actuators and industrial robotics; AI/ML approaches for electronic materials behavior, Impact analysis, sensor signal analysis, modeling, and simulation.

Tae-Won Kim is a Professor of Mechanical Engineering, at Hanyang University. Seoul, Korea. He was a Research Fellow in the Department of Materials, University of Oxford, United Kingdom. His research area includes materials behavior and failure analysis, finite element implementation, and the development of advanced functional materials.

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Hiremath, S., Kim, TW. Detection of physical signal and time-frequency analysis owing to the impact on rubber material using a piezoelectric sensor. J Mech Sci Technol 38, 2455–2463 (2024). https://doi.org/10.1007/s12206-024-0424-2

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  • DOI: https://doi.org/10.1007/s12206-024-0424-2

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