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Vibration power generation device

A technology for generators and electrodes, which is applied in electrical components, generators/motors, piezoelectric/electrostrictive/magnetostrictive devices, etc., and can solve problems such as the inability to adjust the resonance frequency of piezoelectric generators

Inactive Publication Date: 2015-05-20
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in practical application, there is a problem that the resonance frequency of the piezoelectric generator cannot be adjusted according to the frequency of the environmental vibration of the application.

Method used

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Examples

Experimental program
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Embodiment Construction

[0035] Figures 1 to 4 A vibration power generation device as one embodiment of the present invention is shown. The vibration power generating device has: a frame part 11; a counterweight part 12, which is arranged inside the frame part 11; a bending part 13, which connects the frame part 11 and the counterweight part 12, and is bent by the displacement of the counterweight part 12; and Power generation unit 18 has lower electrode 15 , piezoelectric layer 16 , and upper electrode 17 stacked in order from the bottom on one surface of curved portion 13 , and generates an AC voltage in response to vibration of weight 12 . In addition, a resonance frequency adjustment mechanism is provided between the frame portion 11 and the weight portion 12 . In addition, the resonance frequency adjustment mechanism is composed of a supporting beam 20 which is provided separately from the bending portion 13 and connects the frame 11 and the weight 12 , and adjusts the resonance frequency by ch...

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PUM

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Abstract

A vibration power generation device comprising: a frame section; a weight section, a flexure section; and a power generation section. The weight section is provided inside the frame section. The flexure section is joined between the frame section and the weight section, and is configured to bend in response to a vibration of the weight section. The power generation section is composed of a laminate on one surface of the flexure section. The laminate has a lower electrode, a piezoelectric layer and an upper electrode which are laminated in this order from the abovementioned one surface. The power generation section is configured to generate an alternating-current voltage in response to an oscillation of the weight section. A resonance frequency adjustment means is provided between the frame section and the weight section.

Description

technical field [0001] The present invention relates to a vibration power generation device that converts vibration energy into electrical energy using MEMS (micro electro mechanical systems: microelectronic device) technology. Background technique [0002] Conventionally, there is a power generating device that is a type of MEMS device that converts vibration energy caused by arbitrary vibration such as movement of a vehicle or a person into electrical energy. Various studies have been conducted on such power generation devices (see Patent Document 1). [0003] The power generating device shown in the above-mentioned Patent Document 1 is as Figure 6 As shown, it includes: a substrate 1; a counterweight part 2, which is arranged on the substrate 1; a phosphor bronze plate 3, which connects the substrate 1 and the counterweight part 2, and is bent by the displacement of the counterweight part 2; and a piezoelectric power generation part 6. Piezoelectric ceramic plates 4 and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00H10N30/30
CPCB81B3/0078H02N2/188H10N30/306H02N2/18
Inventor 小川纯矢山内规裕松岛朝明相泽浩一
Owner PANASONIC CORP