Full-field high frequency vibration measurements

Dynamic characterization of vibrating targets represents a critical issue for many industrial fields. Full-field methods are of great interest in representing the whole structure response. The research activity is focused on the development of a stereo-camera system integrated with a Digital Image Correlation (DIC) algorithm, in order to perform 3D full-field vibration measurements in the range of kHz. The system exploits two industrial low-speed cameras, and the Nyquist-Shannon frequency limitation is overcome by a down-sampling approach under the hypothesis that the vibration signal is characterized by a single known frequency component. Experimental results obtained from the measurement of several targets showed good performances up to about 4 kHz, with amplitudes in the order of 0.01 mm.

Research group
Paolo Neri, Alessandro Paoli, Armando V. Razionale, Sandro Barone, Ciro Santus


Funding:

  • PRA 2018-2019

Main publications:

  • S. Barone, P. Neri, A. Paoli, A.V. Razionale, Low-frame-rate single camera system for 3D full-field high-frequency vibration measurements, Mechanical Systems and Signal Processing, Elsevier, 2019, Vol. 123, pp. 143-152, DOI: 10.1016/j.ymssp.2019.01.016
  • S. Barone, P. Neri, A. Paoli, A.V. Razionale, L. Bertini, C. Santus, Optical stereo-system for full-field high-frequency 3D vibration measurements based on low-frame-rate cameras, ADM2019 International Conference, September 9-10 2019, Modena, Italy.
  • S. Barone, P. Neri, A. Paoli, A.V. Razionale, 3D vibration measurements by a virtual-stereo-camera system based on a single low frame rate camera, 47th International Conference on Stress Analysis, Procedia Structural Integrity, September 5-8 2018, Villa S. Giovanni, Italy, DOI: 10.1016/j.prostr.2018.11.101
  • S. Barone, P. Neri, A. Paoli, A.V. Razionale, Flexible calibration of a stereo vision system by active display, 29th International Conference on Flexible Automation and Intelligent Manufacturing, June 24-28 2019, Limerick, Ireland.