The vibration harvester from Fraunhofer IIS is characterized by the effective use of the smallest vibrations of 100 mg and less. At a frequency of 60 hertz, we can supply sensors with electrical energy and transmit the measured data via Bluetooth Low Energy.
The technology: Energy Harvesting
Energy Harvesting uses energy from the environment such as heat, light, or movement to supply small electronic devices. Self-powered, maintenance-free, and wireless systems with unlimited operating and standby time become reality. This also enables to power devices in places that are difficult to access. Areas of application include wireless sensors for monitoring machines and systems (condition monitoring), tracking systems, and sensors for building automation.
How does the vibration harvester work?
Piezoelectric materials react with a charge separation of internal electrical charges when deformed by motion or periodic vibration. Thus, piezoelectric materials can be deformed in a vibration transducer by existing vibrations and therefore generate electrical energy at the end. Piezoelectric generators typically generate large voltages in the range of ten to one hundred volts, but only very small currents. They can be built as a resonant cantilever structure or applied directly to surfaces with mechanical deformation.