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Piezoelectric transducer and piezoelectric wave energy collecting device employing same

A technology of piezoelectric transducers and piezoelectric sheets, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve difficult-to-apply remote sea and small ocean detection Problems such as large size of equipment and structure, easy to be corroded, etc., achieve the effect of improving energy conversion efficiency, small size of monomer, and good adaptability

Active Publication Date: 2016-08-10
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A "surge energy storage self-generating buoy" disclosed in Chinese Invention Patent Application Publication No. CN101021200A is to accumulate wave energy through a clockwork and transmit it to a generator through gears. Its shortcoming lies in converting wave energy into rotational mechanical energy. , and after many times of energy transfer, the efficiency is reduced, and the mechanical parts will wear out, the structure size is large, and it is difficult to apply to the open sea and small ocean detection equipment
The "straight-line magnetic pole static wave energy generating device for buoys" announced by China Invention Patent Grant No. CN102900594 B converts wave energy into reciprocating motion of the armature, and interacts with permanent magnets to generate electric energy. The disadvantage is that , the device requires the magnetic poles to be stationary and requires a relatively stable platform, while small marine detection equipment swings with the waves and is difficult to apply
"A Piezoelectric Generating Device and Method for Capturing and Disposing of Directional Wave Energy" announced by China Invention Patent Authorization Announcement No. CN104079207 B transmits the vertical motion of waves to the piezoelectric generating device to generate electric energy through floats and levers, and its shortcomings Due to the large size of the device, it cannot be applied in the open sea
The common disadvantage of the above inventions is that there are exposed moving parts, bearings, levers, etc., which are easily corroded in high-salt and high-humidity environments at sea and need to be replaced regularly, so they can only be used in offshore

Method used

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  • Piezoelectric transducer and piezoelectric wave energy collecting device employing same
  • Piezoelectric transducer and piezoelectric wave energy collecting device employing same
  • Piezoelectric transducer and piezoelectric wave energy collecting device employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Combining figure 1 with figure 2 , the piezoelectric transducer of the present invention comprises shell 2, two splints A3, mass block 4, elastic element 5, thin-film piezoelectric sheet 6, two splints B 7, and elastic element 5 is to have at least three elastic arms The spring sheet structure, one end of all elastic arms meet and one end is free, that is, the present invention can have 3 elastic arms, 4 elastic arms, 5 elastic arms, etc., which can be arranged evenly and symmetrically. Thin-film piezoelectric sheet 6 is pasted on the both sides surfaces of the elastic arm of elastic element 5, specifically piezoelectric sheet is polyvinylidene fluoride film thin-film piezoelectric sheet (PVDF), and the elastic arm of each elastic element is moved toward the same The center of the side is bent into a cage shape, and the end of the elastic arm is fixed on one side of the mass block with the splint A3, and the combination of the film-type piezoelectric sheet ...

Embodiment 2

[0018] Embodiment 2: Based on Embodiment 1, there are four elastic arms in the present invention, and the elastic element is a cross-shaped spring leaf structure.

Embodiment 3

[0019] Embodiment three: based on embodiment one or embodiment two, in combination figure 1 with image 3 , the present invention provides a piezoelectric wave energy harvesting device, comprising an upper end cover 1, a sealed housing composed of an outer shell 2 and a lower end cover 8, that is, the outer shell is located between the upper end cover and the lower end cover, and the outer shell is connected to the upper end cover and the lower end cover. The lower end cover is connected to play the role of protection and sealing. The cross ends of the two groups of elastic elements are respectively fixed on the upper end cover 1 and the lower end cover 8 through two splints B 7, specifically, the cross ends are connected with splint B and screws respectively The upper end cover and the lower end cover are connected and fixed so that the piezoelectric transducer is located between the upper end cover and the lower end cover. The device is sealed inside.

[0020] Install the ...

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Abstract

The invention provides a piezoelectric transducer and a piezoelectric wave energy collecting device employing same. The piezoelectric transducer comprises a mass block, two groups of elastic elements, two clamping plates A and two clamping plates B, wherein each elastic element is a spring leaf structure formed by at least three elastic arms; the elastic arms intersect with one another at one end of each of the elastic arms, and therefore an intersection end of each elastic element is formed, the other end of each of the elastic arms extends so as to form a free end of each elastic element, the intersection end of each elastic element is mounted on a corresponding clamping plate B, the free ends of the two groups of elastic elements bend toward a center at the same side so as to be shaped like a cage, then the free ends of the two groups of elastic elements are respectively mounted on an upper end face and a lower end face of the mass block via corresponding clamping plates A, piezoelectric patches are pasted on surfaces at two sides of each elastic arm, the elastic arms serve as common poles of the piezoelectric patches, and the other pole of each piezoelectric patch is connected with an electric energy collection circuit. The energy transducer disclosed in the invention is small in single unit size and can be individually applied to small-sized and mini-sized marine exploration equipment, and multiple energy transducers can be applied to medium-and-large-sized marine exploration equipment when being connected in parallel.

Description

technical field [0001] The invention relates to a transducer and an energy collection device, in particular to a piezoelectric transducer and a piezoelectric wave energy collection device using the transducer. Background technique [0002] With the advancement of technology, marine detection equipment gradually tends to be miniaturized and low-energy consumption, and the expansion of the detection range also makes the scale of the launch larger and larger. Marine exploration equipment generally works for a long time without being on duty. For equipment powered by batteries, its working life is limited by the power of the battery. Most of the working life does not exceed one to two years. Although equipment using solar and wind energy can Regardless of the lifespan limit, its power generation unit is large in size, exposed to the outside, and affected by the weather. Wave energy is a kind of abundant renewable energy on the sea. Converting it into electric energy can provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
CPCH02N2/185H02N2/186H02N2/188
Inventor 刘学广范朝阳韩超
Owner HARBIN ENG UNIV