Abstract
Durability is a critical issue concerning energy-harvesting devices. Despite the energy-harvesting device’s excellent performance, moving components, such as the metal spring, can be damaged during operation. To solve the durability problem of the metal spring in a vibration-energy-harvesting (VEH) device, this study applied a non-contact magnetic spring to a VEH device using the repulsive force of permanent magnets. A laboratory experiment was conducted to determine the potential energy-harvesting power using the magnetic spring VEH device. In addition, the characteristics of the generated power were studied using the magnetic spring VEH device in a high-speed train traveling at 300 km/h. Through the high-speed train experiment, the power generated by both the metal spring VEH device and magnetic spring VEH device was measured, and the performance characteristics required for a power source for wireless sensor nodes in high-speed trains are discussed.
Highlights
Introduction a Magnetic Spring for ImprovedIn recent years, the demand for improved reliability and safety of systems and structures has increased owing to accidents and natural disasters, and the increase in maintenance work and cost for these systems and structures has emerged [1]
Through the high-speed train test, the generated power of the metal spring VEH device and magnetic spring VEH device was measured, and the performance characteristics of a power source for wireless sensor nodes in high-speed trains are discussed
9.41 metal spring of the metal spring is 245.97 reduced by the limiting performance of the displacement, resulting in stress above the yield strength of the spring, which leads tofor deformation or fatigue failure is of subject the themetal rubber material the mechanical stopper to ing over an extended period of time, a characteristic of natural rubber. For this rea metal spring has increased contact impact, and the performance of the metal s reduced by the limiting performance of the displacement, resulting in stress ab changes in the weight of the mass body for the design of the magnetic spring VEH device applicable to high‐speed trains
Summary
The demand for improved reliability and safety of systems and structures has increased owing to accidents and natural disasters, and the increase in maintenance work and cost for these systems and structures has emerged [1]. Micromachines 2021, 12, 830 sensor nodes can be applied to high-speed trains without modifying the systems, enabling maintenance based on actual driving conditions while moving. This differs from the current methods used in maintenance management, such as periodic preventive disassembly and inspection. Design and experimental studies were conducted to determine the amount of energy-harvesting power possible with a design that prevents metal spring damage to improve the durability of a VEH device with a mechanical stopper for use on high-speed trains [41]. Through the high-speed train test, the generated power of the metal spring VEH device and magnetic spring VEH device was measured, and the performance characteristics of a power source for wireless sensor nodes in high-speed trains are discussed
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