Wideband piezoelectric type vibration energy collection device with movable mass ring

Abstract

The invention discloses a wideband piezoelectric type vibration energy collection device with a movable mass ring. The wideband piezoelectric type vibration energy collection device comprises an elastic beam, a piezoelectric element, a sliding track, limiting stop blocks and the movable mass ring, wherein the elastic beam is suspended with the two end surfaces fixed, the piezoelectric element is closely attached to the surface of the elastic beam and is adjacent to one fixed end of the elastic beam, the sliding track is located in the middle of the elastic beam, the limiting stop blocks are located at the two ends of the sliding track and fixed to the elastic beam, and the sliding track and the elastic beam penetrate through the movable mass ring which is freely suspended on the sliding track. According to the device, the frequency bandwidth of vibration energy collection is increased through the movement behaviors such as sliding and rotation performed by the movable mass ring under the outside vibration effect, and therefore wideband work of the piezoelectric type vibration energy collection device is achieved.

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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