A Piezoelectric Energy Harvester for Harvesting Human Kinetic Energy

Abstract

The invention relates to a piezoelectric energy collector for collecting human body kinetic energy. The piezoelectric energy collector comprises an upper framework, a lower framework, an upper cantilever beam, a lower cantilever beam, an adjustment washer, an adjustment bolt, a locking bolt, an adjustment block, a PVDF piezoelectric beam and a mass block, wherein the upper framework and the lowerframework are of hollow square structures from a top view direction and are connected by four surrounding bolts, a left end of the PVDF piezoelectric beam is clamped and fixed by the upper framework and a left end of the lower framework, a right end of the PVDF piezoelectric beam is fixedly arranged a gap in a left end of the adjustment block, and the upper cantilever beam and the lower cantileverbeam are respectively arranged at an upper side and a lower side of the PVDF piezoelectric beam and are symmetrically arranged. The bending flexibility of the PVDF piezoelectric beam and the weight of the mass block of the cantilever beams are changed by the adjustment block, the piezoelectric energy collector can be applicable to different vibration source environments, and the human body kinetic energy collection efficiency can be effectively improved.

Description

technical field [0001] The invention belongs to the field of piezoelectric energy collection, in particular to a piezoelectric energy collector for collecting kinetic energy of a human body. Background technique [0002] With the continuous improvement of microelectronics technology and wireless sensing technology, wearable smart electronic devices have developed rapidly, and their applications are becoming more and more extensive, including smart communication devices, health monitoring sensors and implanted electronic devices Wait. Although large-scale electronic integration technology has made electronic components consume less and less power, the power consumption of these electronic devices has gradually increased due to the increase in the number of components. The traditional battery power supply has disadvantages such as large size, heavy weight, low battery life, and easy pollution of the environment, which restricts the development of wearable devices. Therefore,...

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Problems solved by technology

[0005] The object of the present invention is to provide a piezoelectric energy harvester for collecting kinetic energy of the human body, so as to solve the problems that the prior art human body kinetic energy harvester is not suitable for the low-frequency vibration of the human body, the device and the vibration source do not match, the electromechanical energy conversion efficiency is low, and the output power is not good. advanced questions

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