Particle image velocimetry with auto calibration

  • Authors:

  • Kikuhito Kawasue;Satoshi Aramaki;Yuichiro Ohya

  • Affiliations:

  • Department of Mechanical Systems Engineering, Miyazaki University, Miyazaki, Japan;Department of Mechanical Systems Engineering, Miyazaki University, Miyazaki, Japan;West Japan Fluid Engineering La.Co.LTD.

  • Venue:
  • SSIP'06 Proceedings of the 6th WSEAS International Conference on Signal, Speech and Image Processing
  • Year:
  • 2006

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Abstract

PIV (Particle Image Velocimetry) for a flow measurement have been exploited since the system can detect the instantaneous velocity distribution without any contacts to flow. On the operation of PIV, laser-slit is projected against the flow and the movements of tracer particles on the laser-slit are recorded by CCD, and the computer calculates the velocity vector by analyzing the movements of tracer particles. In order to realize the quantitative measurement, the calibration is required between camera coordinates and world coordinates. The calibration is generally cumbersome and it should be executed on every change of the re-arrangement between CCD and laser projector. In order to reduce the cumbersome work, we developed the PIV system with automatic and real-time calibration using 3D magnetic sensor. The system enables a separated free arrangement of a CCD camera and a laser-slit without calibration. The velocity distribution of different views is reconstructed graphically on a computer display. Experimental results show the feasibility of our system.