Self-tuning type frequency conversion power generation device and method

Abstract

The invention relates to a self-tuning type frequency conversion power generation device and a method. The self-tuning type frequency conversion power generation device is mainly used for energy collection of vibrating working environment. The self-tuning type frequency conversion power generation device comprises a guide rail, a sliding block, a piezoelectric vibrator, a mass block and a fixed device, wherein energy is collected by the piezoelectric vibrator of the self-tuning type frequency conversion power generation device. The self-tuning type frequency conversion power generation device changes a span of a system by the sliding block moving on the guide rail so as to achieve the aim of resonance frequency of a large-scale and high-accuracy adjusting device, and enable the self-tuning type frequency conversion power generation device to be adapted to different working environment in different working environment. The self-tuning type frequency conversion power generation device can be combined with a motion sensitive application sensor, and provides self-power generation monitoring ability.

Description

technical field [0001] The invention relates to the application of miniaturized equipment and methods for collecting vibration energy in the environment, and is especially suitable for collecting environmental energy where the operating frequency changes greatly, and is suitable for integration with sensor applications. Background technique [0002] As a new monitoring technology, sensor network technology has a wide range of applications in production and life. For sensor networks, especially wireless sensor networks, energy supply has a great influence on it, and batteries are generally used for power supply. However, due to the monitoring location of wireless sensor network nodes in engineering, it is sometimes very difficult to replace the battery, and the service life of the battery is limited. Therefore, in order to realize the long-term effective work of the entire sensor network, prolong the application life of the wireless sensor network and reduce the cost, it is ...

AI Technical Summary

Problems solved by technology

However, in the actual application environment, the environmental vibration, such as the vibration of mechanical equipment, often changes, that is, the external operating frequency changes with time, and there is a problem that the natural frequency of the piezoelectric vibrator and the external excitation frequency are at non-resonance.

Piezoelectric materials are very sensitive to changes in frequency. Even if the difference between the external frequency and the natural frequency of the piezoelectric vibrator is small, its deformation will decrease rapidly and the power generation capacity will decrease rapidly.

Due to the structure of ordinary piezoelectric energy harvesting devices, the frequency range is small, and it is difficult to adapt to changes in the external environment.

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