Enhanced low-frequency vibration energy harvesting with inertial amplifiers

Piezoelectric Energy Harvesting Devices for Low Frequency Vibration Applications

A vibration energy harvesting device with bidirectional resonance frequency tunability

Vibration energy harvesting is an attractive technique for potential powering of wireless sensors and low power devices. While the technique can be employed to harvest energy from vibrations and vibrating structures, a general requirement independent of the energy transfer mechanism is that the vibration energy harvesting device operate in resonance at the excitation frequency. Most energy harv...

Broadband and Low Frequency Vibration-based Energy Harvesting Improvement through Magnetically Induced Frequency Up- Conversion

In order to extract as much energy as possible from ambient vibrations, many vibration-based energy harvesters (VEHs) are designed to resonate at a specific base excitation frequency. Unfortunately, many vibration energy sources are low frequency (0.5 Hz-100 Hz), intermittent, and broadband. Thus, resonant VEHs would not be excited continuously and would require a large mass or size to tune to ...

A low frequency rotational energy harvesting system

This paper presents a rotary power scavenging unit comprised of two systems of flexible beams connected by two masses which are joined by means of a spring, considering a PZT (QP16N, Midé Corporation) piezoelectric sheet mounted on one of the beams. The energy harvesting (EH) system is mounted rigidly on a rotating hub. The gravitational force on the masses causes sustained oscillatory motion i...

Miniaturization of Inertial Magnetoelectric Vibration Velocity Sensor with High Frequency Response at Low Frequency Band

The frequency response of the inertial magnetoelectric vibration velocity sensor is limited in the low frequency range due to the character of second order high pass filter of the structure. For better performance in the low frequency range, the traditional method is to increase the initial mass of the sensor which will increase the size and weight tremendously. This paper presents a frequency-...