A self-powered and self-monitoring ultra-low frequency wave energy harvester for smart ocean ranches.

The ocean ranch environment contains ultra-low-frequency wave energy that can be utilized for powering low-power equipment. Therefore, this article proposes a smart ocean ranch self-powered and self-monitoring system (SOR-SSS) which consists of several key components: a mass pendulum ball (MPB), a commutation wheel system (CWS), an electromagnetic energy harvesting unit (EEHU), and four piezoelectric energy harvesting units (PEHU). Through six-degree-of-freedom vibration test bench experiments, the SOR-SSS achieved a maximum output power of 17.

A vibration energy harvester for freight train track self-powered application.

The safe and stable operation of the widely distributed freight trains urgently needs to solve the power supply problem of the freight train track monitoring network. In this article, an innovative and efficient energy harvesting mechanism is designed based on a mechanical vibration rectifier (MVR), with four modules of motion conversion, motion rectification, generator, and storage. The motion conversion module converts the linear vibration of the rail into rotational motion through the ball screw.