No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Development of a scanning head for laser Doppler vibrometry (LDV) using dual optical wedges
3. X. D. Zeng, A. L. Wicks, and T. E. Allen, “Pose estimation of a scanning laser Doppler vibrometer with applications to the automotive industry,” Opt. Eng. 37(5), 1442–1447 (1998).
6. Polytec, “Structure-borne noise measurement with a robot-controlled 3-D scanning laser vibrometer,” InFocus 1, 5–7 (2008);
7. A. B. Stanbridge and D. J. Ewins, “Measurement of translational and angular vibration using a scanning laser Doppler vibrometer,” Shock Vib. 3(2), 141–152 (1996).
8. P. Sriram, J. I. Craig, and S. Hanagud, “A scanning laser Doppler vibrometer for modal testing,” Int. J. Anal. Exp. Modal Anal. 5(3), 155–167 (1990).
10. S. Vanlanduit, P. Guillaume, and J. Schoukens, “Broadband vibration measurements using a continuously scanning laser vibrometer,” Meas. Sci. Technol. 13(10), 1574–1582 (2002).
11. J. P. La, J. Choi, S. Y. Wang, K. Kim, and K. Park, “Continuous scanning laser Doppler vibrometer for mode shape analysis,” Opt. Eng. 42(3), 730–737 (2003).
13. M. S. Allen and M. W. Sracic, “A new method for processing impact excited continuous-scan laser Doppler vibrometer measurements,” Mech. Syst. Signal Process. 24(3), 721–735 (2010).
14. P. Giuliani, D. DiMaio, C. W. Schwingshackl, M. Martarelli, and D. J. Ewins, “Six degrees of freedom measurement with continuous scanning laser Doppler vibrometer,” Mech. Syst. Signal Process. 38, 367–383 (2013).
15. P. Castellini and N. Paone, “Development of the tracking laser vibrometer: performance and uncertainty analysis,” Rev. Sci. Instrum. 71(12), 4639–4647 (2000).
16. B. J. Halkon and S. J. Rothberg, “Vibration measurements using continuous scanning laser vibrometry: advanced aspects in rotor applications,” Mech. Syst. Signal Process. 20(6), 1286–1299 (2006).
17. S. Zucca, D. DiMaio, and D. J. Ewins, “Measuring the performance of underplatform dampers for turbine blades by rotating laser Doppler vibrometer,” Mech. Syst. Signal Process. 32, 269–281 (2012).
18. P. Castellini and R. Montanini, “Automotive components vibration measurements by tracking laser Doppler vibrometry: advances in signal processing,” Meas. Sci. Technol. 13, 1266–1279 (2002).
19. H. Dietzhausen, K. Bendel, and N. Scelles, “Tracking scanning laser Doppler vibrometers: extending laser vibrometry to arbitrarily moving objects,” in Proceedings of the IMAC XXI: A Conference and Exposition on Structural Dynamics, Kissimmee, Florida, 2003.
21. D. Di Maio and D. J. Ewins, “CAISER MYMESIS: a new software platform for virtual and actual vibration testing on rotating structures using a continuously scanning LDV technique,” Proc. SPIE 6345, 63450Q (2006).
22. R. A. Lomenzo, A. J. Barker, and A. L. Wicks, “Laser vibrometry system for rotating bladed disks,” in Proceedings of the 17th International Modal Analysis Conference (SEM, Kissimmee, FL, 1999), Vol. 3727, pp. 277–282.
23. I. A. Sever, A. B. Stanbridge, and D. J. Ewins, “Turbomachinery blade vibration measurements with tracking LDV under rotation,” Proc. SPIE 6345, 63450L (2006).
24. D. Di Maio and D. J. Ewins, “Applications of continuous tracking SLDV measurement methods to axially symmetric rotating structures using different excitation methods,” Mech. Syst. Signal Process. 24(8), 3013–3036 (2010).
25. S. Boedecker, A. Drabenstadt, L. Heller, A. Kraft, A. Leonhardt, C. Pape, S. Ristau, E. Reithmeier, and C. Rembe, “Optical derotator for scanning vibrometer measurements on rotating objects,” Proc. SPIE 6345, 63450M (2006).
29. S. J. Rothberg and M. Tirabassi, “A universal framework for modelling measured velocity in laser vibrometry with applications,” Mech. Syst. Signal Process. 26, 141–166 (2012).
30. B. M. Watrasiewicz and M. J. Rudd, Laser Doppler Measurements (Butterworths, London, Boston, 1976).
31. J. R. Bell and S. J. Rothberg, “Laser vibrometers and contacting transducers, target rotation and six degree-of-freedom vibration: what do we really measure?,” J. Sound Vib. 237(2), 245–261 (2000).
32. B. J. Halkon and S. J. Rothberg, “Vibration measurements using continuous scanning laser Doppler vibrometry: theoretical velocity sensitivity analysis with applications,” Meas. Sci. Technol. 14, 382–393 (2003).
33. An Introduction to Ray Tracing, edited by A. S. Glassner (Academic Press, London, 1989).
34. S. J. Rothberg and M. Tirabassi, “Are rotating wedges a feasible alternative to dual mirrors for scanning and tracking LDV?,” AIP Conf. Proc. 1457, 5 (2012).
Article metrics loading...
A new laser Doppler vibrometry scanning head is proposed based on a pair of rotating optical wedges. A comprehensive mathematical model is developed and used to demonstrate how the wedges can be configured to scan point-by-point, in a line, in a circle, and in a combination of the two such that a straight line scan could be performed on a structure during rotation. Inevitable misalignments are incorporated into the model and considered quantitatively for the circular tracking application. Certain advantages are apparent over systems based on dual mirrors and a Dove prism in terms of lower apparent velocities at low rotation orders. A scanning head design for the circular tracking application is presented, together with experimental data showing good agreement between predicted and measured apparent velocities caused by misalignments.
Full text loading...
Most read this month