In this paper, the authors propose a noncontact sensor using the speckle phenomena for the assessment of target velocity at low vibration frequencies. The sensor is realized using few optical components in a very simple optical configuration. The methodology for the experimental and analytical determination of the sensor sensitivity is reported, and two speckle-processing algorithms have been used to appraise the best cross-correlation function for target elocity measurement. The algorithms are based on binary correlation and fast Fourier transform analysis. Experimental results coming from the comparison of both the proposed techniques are reported. Moreover, results obtained with the proposed specklesensor have been compared with reference measurement systems.
Non-contact speckle-based velocity sensor / DI DONATO, Andrea; Scalise, Lorenzo; Zappelli, Leonardo. - In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. - ISSN 0018-9456. - STAMPA. - 53:1(2004), pp. 51-57. [10.1109/TIM.2003.821482]
Non-contact speckle-based velocity sensor
DI DONATO, Andrea;SCALISE, Lorenzo;ZAPPELLI, Leonardo
2004-01-01
Abstract
In this paper, the authors propose a noncontact sensor using the speckle phenomena for the assessment of target velocity at low vibration frequencies. The sensor is realized using few optical components in a very simple optical configuration. The methodology for the experimental and analytical determination of the sensor sensitivity is reported, and two speckle-processing algorithms have been used to appraise the best cross-correlation function for target elocity measurement. The algorithms are based on binary correlation and fast Fourier transform analysis. Experimental results coming from the comparison of both the proposed techniques are reported. Moreover, results obtained with the proposed specklesensor have been compared with reference measurement systems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
