Helical Spring Type Low Frequency Piezoelectric Energy Harvester

Abstract

The invention discloses a helical spring type low-frequency piezoelectric energy arrester which comprises an energy-arresting structural system consisting of an energy-arresting element and a concentrated mass block oscillator (5), wherein the energy-arresting element is composed of a piezoelectric tube (1) with electrodes; the piezoelectric tube (1) is helically bent into a helical spring shape; a positive electrode (2) and a negative electrode (3) are embedded on the tube body of the piezoelectric tube (1) according to a certain helical ascend angle helical interval; the two electrodes are connected with an energy-consuming element or an energy-storing unit; and one end of the piezoelectric tube (1) is connected with an environment vibrating source and the other end of the piezoelectric tube (1) is connected with the concentrated mass block oscillator (5). The invention further discloses a method for manufacturing the energy arrester. The energy arrester disclosed by the invention can efficiently arrest energy from low-frequency environment excitation and the resonant frequency of the energy arrester can be regulated through structural parameters, such as size of oscillator mass, winding circle number of the piezoelectric tube, helical radius of the spring and the like, so that different requirements for low-frequency energy arresting can be reached.

Description

technical field [0001] The invention relates to an energy harvester, in particular to a low-frequency piezoelectric energy harvester capable of converting low-frequency environmental vibration energy into electrical energy. Background technique [0002] The work of microelectronic devices and wireless sensor networks requires a certain amount of energy, and the traditional energy supply method is to carry batteries for energy supply. However, battery power supply has disadvantages such as short service period, difficulty in replacement, and high quality / energy ratio (mass-energy ratio), which cannot meet the needs of further development of modern microelectronic devices. Therefore, finding a new and more effective energy supply method is a key technology for modern sensing technology to be more miniaturized, more integrated, and have more modern functions such as automatic calibration, wireless manipulation, and human-machine compatibility. [0003] In view of the fact that...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a helical spring type low-frequency piezoelectric energy harvester, which overcomes the shortcomings of current energy harvesters such as large size and low energy harvesting efficiency in high and low frequency bands.

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