Title :
Laser Doppler Vibrometry system using the synthetic-heterodyne interferometric demodulation scheme implemented on a CMOS DSP camera
Author :
Connelly, M.J. ; Szecówka, P.M. ; Jallapuram, R. ; Martin, S. ; Toal, V. ; Whelan, M.P.
Author_Institution :
Opt. Commun. Res. Group, Univ. of Limerick, Limerick
Abstract :
A laser Doppler vibrometer (LDV) is described which uses a CMOS digital camera, incorporating a digital signal processor, to carry out real-time signal processing of the interferometer output to allow multipoint LDV to be implemented. The synthetic-heterodyne technique is used to overcome the interferometric fading effect due to slow environmental changes. Vibration frequencies up to 100 Hz were detected successfully.
Keywords :
CMOS image sensors; Doppler measurement; demodulation; interferometry; signal processing; vibration measurement; CMOS; DSP camera; digital camera; digital signal processor; laser Doppler vibrometry system; real-time signal processing; synthetic-heterodyne interferometric demodulation; vibration frequencies; CMOS image sensors; Cameras; Demodulation; Digital signal processing; Diode lasers; Frequency; Laser beams; Optical interferometry; Optical signal processing; Phase shifting interferometry;
Conference_Titel :
Communication Systems, Networks and Digital Signal Processing, 2008. CNSDSP 2008. 6th International Symposium on
Conference_Location :
Graz
Print_ISBN :
978-1-4244-1875-6
Electronic_ISBN :
978-1-4244-1876-3
DOI :
10.1109/CSNDSP.2008.4610788
