Miniature composite vibration generator

Abstract

The present invention discloses a miniature composite vibration generator. The miniature composite vibration generator comprises a base, a shell arranged on the base and a thin film piezoelectric piece arranged in the shell, and further comprises a solar photovoltaic cell arranged on the upper surface of the shell, a circuit board arranged in the shell, and a U-shaped mass block connected with thethin film piezoelectric piece. The thin film piezoelectric piece and the solar photovoltaic cell are respectively connected with the circuit board through the wires. The generator can be used to collect the mechanical energy generated by external vibration, absorb the light energy, and convert the collected mechanical energy and light energy into the electrical energy to replace or assist the battery to supply power to the embedded sensor, the wireless sensor network node, the field ecological and environmental monitoring network, safety monitoring networks for the agriculture and hazardous operations, and wireless condition monitoring systems for aircrafts, vehicles, bridges, industrial equipment and other facilities. The generator has a simple structure, convenient manufacture, a low cost and a wide application prospect.

Description

technical field [0001] The invention belongs to the field of micro-power supply technology and energy-saving technology, in particular to a micro-composite vibration generator. Background technique [0002] The use of piezoelectric materials to construct micro-generators has long been applied in China. For example, the Chinese patent CN1547312A "micro-generator" discloses a capacitive vibration generator, which is easy to integrate with other MEMS devices. However, when the capacitor starts to work It needs to be polarized under the action of an external electric field, which is limited by the working environment to a certain extent, which hinders its further development and application. [0003] Chinese patent CN101515746A "Microcomputer Electromagnetic Energy Harvester and Preparation Method" discloses an electromagnetic vibrating generator, which overcomes the shortcoming that the capacitive generator needs an external power supply to start working, but due to its complex...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies in the above-mentioned patent application, and to provide a miniature composite vibration generator with strong power generation capacity, low cost, simple structure, and adaptable to various environmental conditions. , improve the control circuit and mass block structure, and solve the problems of the previous micro-generator adapting to the single environment, insufficient power generation under micro-vibration, fatigue damage at the fixed end of the piezoelectric cantilever beam, and unreasonable power processing and output control.

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