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Linear moving cam type negative Poisson's ratio piezoelectric energy harvester

A negative Poisson's ratio, piezoelectric energy capture technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the single energy capture mode, vibration frequency limitation , low energy capture efficiency, etc., to achieve the effects of high space utilization, stable output, and flexible design

Pending Publication Date: 2022-03-11
HARBIN INST OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a linear moving cam type negative Poisson's ratio piezoelectric energy harvester to solve the problems of traditional piezoelectric energy harvesters limited by vibration frequency, low energy harvesting efficiency and single energy harvesting mode

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  • Linear moving cam type negative Poisson's ratio piezoelectric energy harvester
  • Linear moving cam type negative Poisson's ratio piezoelectric energy harvester
  • Linear moving cam type negative Poisson's ratio piezoelectric energy harvester

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Embodiment Construction

[0023] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 to Figure 4 As shown, a linear moving cam type negative Poisson's ratio piezoelectric energy harvester according to the present invention includes an upper frame 1, a lower frame 2, a moving cam 3, a buffer spring 14 and a piezoelectric beam 4 components;

[0025] One end of the piezoelectric beam 4 is fixed on the inner wall of the upper frame 1 by bolts and nuts and the connecting plate 5, the upper frame 1 and the lower frame 2 are connected by bolts and nuts, and the guide rods 15 on both sides of the moving cam 3 pass through the guide rods 15 fixed in the positioning groove 13 of the frame. The circular flange type linear bearing 6, the buffer spring 14 is set on the moving cam guide rod 15, and the column 7 at the end of the piezoelectric beam is embedded in the moving cam groove 8.

[0026] Further: the piezoelect...

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Abstract

The invention discloses a linear moving cam type negative Poisson's ratio piezoelectric energy harvester, belongs to the technical field of vibration energy harvesting, and aims to solve the problems that a traditional piezoelectric energy harvester is limited by vibration frequency, low in energy harvesting efficiency and single in energy harvesting mode. One end of the piezoelectric beam is fixed to the inner wall of the upper frame through bolts and nuts and a connecting plate, the upper frame and the lower frame are connected through bolts and nuts, guide rods on the two sides of the movable cam penetrate through round flange type linear bearings fixed to frame positioning grooves, and buffer springs are arranged on the guide rods of the movable cam in a sleeving mode to prevent the movable cam from being directly collided with the frames to cause damage. A cylinder at the tail end of the piezoelectric beam is embedded into a groove of the movable cam, linear reciprocating motion of the movable cam is converted into alternately-changed stress borne by the piezoelectric material, and energy harvesting is achieved. The energy harvesting performance of the system can be improved by changing the groove curve of the movable cam and the negative Poisson's ratio shape of the elastic base body, and the system has the advantages of being simple in excitation mode, novel in structure, stable in output, high in energy harvesting efficiency, flexible in design and the like.

Description

[0001] Technical field [0002] The invention relates to a piezoelectric energy harvester, in particular to a linear moving cam type negative Poisson's ratio piezoelectric energy harvester, which belongs to the technical field of vibration energy harvesting. Background technique [0003] At present, with the technological advancement of microelectronics and microprocessing technology, large-scale wireless sensor networks, mobile electronic devices and the Internet of Things have developed rapidly, and are widely used in military defense, remote control and environmental monitoring and other fields. Most of the current wireless sensors still use chemical batteries as energy sources, but the limitations of chemical batteries in terms of size, life, integration and environmental protection have brought a lot of inconvenience to the application of microelectronic devices. Therefore, there is an urgent need for an independent micro power supply with long life and stable and continu...

Claims

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Application Information

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IPC IPC(8): H02N2/18
CPCH02N2/18H02N2/186H02N2/188
Inventor 单小彪隋广东闵兆伟谢涛
Owner HARBIN INST OF TECH
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