Broadband Piezoelectric Vibration Energy Harvesting Device with Movable Mass Ring

Abstract

The invention discloses a wide-band piezoelectric vibration energy collection device with a movable mass ring, comprising: an elastic beam, a piezoelectric element, a slideway, a limit block and a movable mass ring, the elastic beam is suspended in the air, Its two ends are fixed, the piezoelectric element is close to the surface of the elastic beam and close to the fixed end of the elastic beam, the slideway is located in the middle of the elastic beam, and the limit stops are located at both ends of the slideway and fixed on the elastic beam On the beam, the movable mass ring passes through the slideway and the elastic beam and hangs freely on the slideway. The device of the invention increases the frequency bandwidth of vibration energy collection by utilizing the motion behaviors such as sliding and rotation generated by the movable mass ring under the action of external vibration, and realizes the broadband operation of the piezoelectric vibration energy collection device.

Description

technical field [0001] The invention belongs to the technical field of energy and electronics, and relates to an energy collection device, in particular to a broadband piezoelectric vibration energy collection device with a movable mass ring. Background technique [0002] With the continuous development of technologies such as the Internet of Things, wireless sensor networks, and micro-electro-mechanical systems, how to efficiently power various sensors and actuators in them for a long time is becoming a major obstacle to their development. Although such devices consume less energy, they are often scattered in remote and harsh environments or implanted inside objects when used, which puts forward relatively high comprehensive requirements for the volume, cost, and lifespan of energy supply components. The main power supply methods at present are batteries and wired power supply. The traditional battery power supply method is difficult to overcome the problems of short life,...

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Problems solved by technology

This needs to consume a lot of manpower and material resources, which increases the cost. Obviously, it is not advisable in reality. Moreover, if the vibration energy harvesting device is placed in an untouched place to power the sensor, broadband work cannot be achieved.

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