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Journal of Sensors
Volume 2018, Article ID 7986438, 7 pages
https://doi.org/10.1155/2018/7986438
Research Article

Wave Power Generation by Piezoelectric Sensor Attached to a Coastal Structure

1Catholic Kwandong University, 579 Beon-gil, Gangneung, Gangwon-do, Republic of Korea
2The Republic of Korea by National Disaster Management Research Institute, 365 Jongga-ro, Jung-gu, Ulsan, Republic of Korea
3Osaka University, 565-0871, Suita, Osaka, Japan

Correspondence should be addressed to Kyu-Han Kim; rk.ca.ukc@mikhk

Received 14 September 2017; Accepted 1 February 2018; Published 8 April 2018

Academic Editor: Taesun You

Copyright © 2018 Kyu-Han Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The characteristics of a new wave power generating system have been proposed by installing a piezoelectric sensor to the seaward position of an existing coastal structure. By installing the sensor to the structure, waves will hit the piezoelectric sensor to generate wave energy; at the same time, the structure acts as a wave breaker. This technique can be applied to various coastal structures to converge the functions of renewable energy generator and the wave reducing structure. This technique of using piezoelectric sensor is relatively inexpensive that can be used for economic purposes as well. Throughout the study, usability of the existing coastal structure and characteristics of current research trend in the ocean wave energy retrieval of the wave power generators have been analyzed. Hydrographic analysis of this technique has been conducted by hydraulic model experiment using 2D wave flume and confirmed that the wave pressure and voltages maximize when higher wave with longer period of wave induces. Throughout the experiment, correlations of generation volume and wave conditions have been found.