Non-Invasive Displacement Measurement of Lightweight Structures Under Dynamic Excitations

The present article deals with the processing of data obtained by non-invasive measurement methods of instantaneous displacement of lightweight structures. This data is necessary to evaluate tuning-up of characteristics of an electro-magnetic vibration energy harvester, which is used for energy harvesting from these ambient mechanical vibrations. The electro-magnetic vibration energy harvester is device for powering of low power consumption wireless sensors without any external source of energy. The primary source of energy is only mechanical vibrations in place of wireless sensor and the operation without primary batteries is required. These techniques of wireless measurement are commonly used in aeronautics applications. The knowledge of mechanical vibrations in place of wireless sensors with vibration energy harvester is used for development of vibration energy harvester design. The major idea is to verify the use of non-invasive measurement using high-speed cameras with measurement obtained from the laser interferometer. The measurement using high-speed camera can provide very important information about resonance operation of the vibration energy harvester during the future development.