Abstract
High-speed trains have a sustained high-noise level for long periods during operation. Although such high-noise levels are effective for acoustic energy harvesting, a practical design for an acoustic energy harvesting system from a high-speed train is lacking. In this study, the design of an energy harvesting system was implemented utilizing noise from a high-speed train during practical operation. We investigated the noise generated from a high-speed train and derived the characteristics of the main noise sources. The results confirmed that low-frequency noise of 50–200 Hz was generated in the passenger, cab, and between car sections. Results from this investigation were used to design a Helmholtz resonator for a target noise of 174 Hz based on a theoretical model. Moreover, numerical simulation was conducted using sound source speakers to investigate vibrations in the walls of the resonator. Finally, energy harvesting experiments were conducted using various types of piezoelectric elements such as rectangular and circular plates. Experimental results indicate that approximately 0.7 V was generated for an incident sound pressure level of 100 dB using a large rectangular plate. Such power level is sufficient to power a variety of low-power electric devices.
Highlights
Research on energy harvesting technology has been actively carried out due to the development of sensor technology with low power consumption.[1,2] Energy harvesting refers to the technology of harnessing external energy such as solar energy and human body kinetic energy and recycling it as electric energy
Acoustic energy harvesting technology has practical limitations because of its low energy density compared to other sources.[3,4]
We investigated the characteristics of noise generated at various positions in highspeed train and used the results to determine the characteristics of the main noise sources
Summary
Research on energy harvesting technology has been actively carried out due to the development of sensor technology with low power consumption.[1,2] Energy harvesting refers to the technology of harnessing external energy such as solar energy and human body kinetic energy and recycling it as electric energy. Keywords Acoustic energy harvesting, piezoelectric generator, Helmholtz resonator, high-speed train, environmental noise
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
