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Piezoelectric floor device of blocking cantilever beam structure

A cantilever beam and piezoelectric technology, applied in the direction of piezoelectric effect/electrostriction or magnetostriction motors, electrical components, generators/motors, etc., can solve the problem of insufficient power generation capacity and small deformation of piezoelectric materials and other issues to achieve the effect of light weight and high power

Inactive Publication Date: 2014-08-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned piezoelectric structure technology is relatively mature, with high output power, stable structure, and large bearing capacity. However, since the square and disc-shaped piezoelectric structures adopt the peripheral fixed support method, the deformation of the piezoelectric material is small, and the power generation capacity cannot be fully utilized.

Method used

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  • Piezoelectric floor device of blocking cantilever beam structure
  • Piezoelectric floor device of blocking cantilever beam structure
  • Piezoelectric floor device of blocking cantilever beam structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, using a piezoelectric floor 7 composed of hexagonal piezoelectric units:

[0015] The thicknesses of the piezoelectric sheet 3 and the substrate 4 of a triangular structure with a vertex angle of 60 degrees and a hypotenuse length of 25 mm are 0.2 mm and 0.4 mm, respectively. The material of the piezoelectric sheet 3 should be selected according to the specific application. For example, you can choose piezoelectric single crystals, such as lead magnesium niobate-lead titanate PMN-PT, lead-free piezoelectric materials, sodium bismuth titanate-barium titanate NBBT, etc., which have good piezoelectric performance or are relatively cheap. Sheet material. You can choose circular, square, triangular, hexagonal and other shapes to cut according to size, and paste the selected six regular triangular piezoelectric sheets on the six substrates 4 respectively, and the six substrates 4 are installed on the bottom plate 5 in the form of a circle. Install the pressure...

Embodiment 2

[0016] Embodiment 2, using 4 triangular cantilever beams to form a square piezoelectric unit:

[0017] The thicknesses of the piezoelectric sheet 3 and the phosphor bronze substrate 4 having a triangular structure with a vertex angle of 90 degrees and a hypotenuse length of 25 mm are 0.17 mm and 0.34 mm, respectively. Four 90-degree triangular cantilever beams form a square as a unit, and the 90-degree triangular piezoelectric structural unit includes a cantilever beam piezoelectric sheet, a base plate, a pressure plate, and a cover plate. The installation method is the same as in Example 1. Also on a 25cm×30cm floor, 20 square piezoelectric units can be laid, with a coverage rate of 84%.

Embodiment 3

[0018] Embodiment 3, using three 120-degree triangular cantilever beams to form a square piezoelectric unit:

[0019] The thicknesses of the piezoelectric sheet 3 with a triangular structure and the phosphor bronze substrate 4 with a vertex angle of 120 degrees and a hypotenuse length of 25 mm are 0.13 mm and 0.26 mm, respectively. Three 120-degree triangular piezoelectric cantilever beams form a square piezoelectric unit, and the installation method is the same as Example 1. Similarly, 20 square piezoelectric units can be laid on a 25cm×30cm floor, and the coverage rate reaches 84%.

[0020] The output power curves of piezoelectric floors with different structures under the same thickness and the same displacement are compared by ANSYS software simulation. Figure 4 and Figure 5 Respectively represent the output power curves when a 100kg pedestrian steps on a 20cm×20cm floor, the top angle is 60 degrees, 90 degrees, 120 degrees, and the thickness of the piezoelectric sheet...

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Abstract

The invention relates to a piezoelectric floor device of a blocking cantilever beam structure and belongs to the field of energy collection based on piezoelectric materials. By the device, the potential energy generated when pedestrians tread on floors is converted into electric energy through piezoelectric patches. According to the piezoelectric floor device, the integrated piezoelectric floors of different shapes are composed of a plurality of hexagonal piezoelectric units. Each hexagonal piezoelectric unit is composed of a cover board, a fixing pressing board, one piezoelectric patch, a base board, a bottom board and a screw. The peripheral fixedly supporting mode of a polygonal piezoelectric structure is changed into the long cantilever beam supporting mode in a blocking mode so as to increase displacement and an output power value. The piezoelectric floor device is applied to pedestrian dense places such as railway stations, subway stations and pedestrian streets, and lighting is provided for pedestrians in the walking process in the mode that LEDs and energy storage elements are connected. The piezoelectric floor device is light, small in size and high in electric energy generating capacity and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of energy collection based on piezoelectric materials, and relates to a piezoelectric floor device with a segmented cantilever beam structure, which converts potential energy generated by pedestrians stepping on the floor into electrical energy through piezoelectric sheets. Background technique [0002] At present, the structural units of the piezoelectric floor mainly include disc-shaped piezoelectric structures, stacked piezoelectric structures, arched piezoelectric structures, bridge-shaped piezoelectric structures, cymbal-shaped piezoelectric structures, and cantilever beams. At present, most of the researches are rectangular and disc-shaped piezoelectric structures with peripheral fixed support methods. For example, in 2011, Pisharody Harikrishnan G published a paper titled on pages 244-247 of Innovative Smart Grid Technologies-India ISGT India, IEEE PES "An optimal design for piezoelectric energy harvesting syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 董维杰金海泉白凤仙
Owner DALIAN UNIV OF TECH
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