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Related Concept Videos

Drift Velocity01:19

Drift Velocity

The high speed of electrical signals results from the fact that the force between charges acts rapidly at a distance. Thus, when a free charge is forced into a wire, the incoming charge pushes other charges ahead due to the repulsive force between like charges. These moving charges move the charges farther down the line. The density of charge in a system cannot easily be increased, so the signal is passed on rapidly. The resulting electrical shock wave moves through the system at nearly the...

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A Drifter-Based Self-Powered Piezoelectric Sensor for Ocean Wave Measurements.

Seyyed Masoud Kargar1, Guangbo Hao1

  • 1School of Engineering and Architecture, University College Cork, T12K8AF Cork, Ireland.

Sensors (Basel, Switzerland)
|July 9, 2022
PubMed
Summary

A novel drifter-based piezoelectric sensor accurately measures ocean wave height and period. This self-powered sensor utilizes dynamic modeling and finite element analysis, validated by experiments, for reliable marine environmental monitoring.

Keywords:
drifterenergyharvestermeasurementoceanpiezoelectricseasensorwave

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Area of Science:

  • Marine Technology
  • Sensor Development
  • Piezoelectric Materials

Background:

  • Piezoelectric materials are increasingly used in marine energy harvesting due to the ocean's dynamic environment.
  • Existing applications primarily focus on energy harvesting, with limited use in marine sensing and measurement.
  • Accurate measurement of ocean wave characteristics (height and period) is crucial for various marine operations.

Purpose of the Study:

  • To propose and analyze a novel drifter-based piezoelectric sensor for measuring ocean wave height and period.
  • To develop a dynamic model for understanding the sensor's motion principle and performance.
  • To validate the sensor's functionality through finite element analysis (FEA) and experimental testing.

Main Methods:

  • Development of a dynamic model to simulate the sensor's response to ocean waves.
  • Finite Element Analysis (FEA) using COMSOL-Multiphysics with coupled Solid Mechanics and Electrostatics Modules.
  • Fabrication and experimental testing of a prototype using a slider-crank mechanism to mimic ocean waves.

Main Results:

  • The dynamic model accurately predicted the sensor's response to wave inputs.
  • FEA simulations provided reliable output voltage predictions.
  • Experimental results closely matched the predictions from the dynamic model and FEA simulations, validating the sensor's performance.

Conclusions:

  • The proposed drifter-based piezoelectric sensor is a viable tool for measuring ocean wave height and period.
  • The developed dynamic model and FEA simulations are effective for analyzing and designing such sensors.
  • The sensor demonstrates self-powering functionality and offers potential for enhanced marine environmental monitoring.