Low cost subpixel method for vibration measurement
Belén Ferrer, Julián Espinosa, Ana Belén Roig, Jorge Pérez Rodríguez, Pablo Acevedo, David Mas · AIP conference proceedings · 2014
Traditional vibration measurement methods are based on devices that acquire local data by direct contact (accelerometers, GPS) or by laser beams (Doppler vibrometers). Our proposal uses video processing to obtain the vibration frequency directly from the scene, without the need of auxiliary targets or devices. Our video-vibrometer can obtain the vibration frequency at any point in the scene and can be implemented with low-cost devices, such as commercial cameras. Here we present the underlying theory and some experiments that support our technique.