Flow Velocity Field Tomography Using Multiple Ultrasonic Beam Detectors and High Order Correlation Analysis
In this paper, a new method for tomographic reconstruction of velocity field which consists of a set of streams with different velocities, directions, positions and radiuses of curvatures with statistically independent fluctuations is proposed.
In this method, five ultrasonic beams which are arranged in proper positions and directions are used as the line detectors and the fifth-order correlation analysis is applied to the detected data. Then information about each stream is transformed as a corresponding peak in the fifth-order correlation space, hence the velocity field can be reconstructed by finding flow parameters from the measured correlation data in connection with the geometries of the measuring system.
The usefulness of this method is confirmed by computer simulations as well as experiments which are carried out by using 4.5 MHz ultrasonic wave system.
KeywordsVelocity Field Moment Function Tomographic Reconstruction Line Detector Ultrasonic Beam
Unable to display preview. Download preview PDF.
- 1.H. D. Thompson and W. H. Stevenson, Developments in Instrumentation, in: “Laser Velocimetry and Particle Sizing”, Hemisphere Pub. Corp., New York (1978)Google Scholar
- 4.M. S. Beck and A. Plaskowski, Analytical and Physical Models for Cross Correlation Flowmeter Design, in: “Cross Correlation Flowmeters”, Adam Hilger, Bristol (1987)Google Scholar
- 6.S. A. Johnson, J. F. Greenleaf, W. A. Samayoa, F. A. Duck and J. Sjostrand, Reconstruction of Three-Dimensional Velocity Fields and Other Parameters by Acoustic Ray Tracing, IEEE Utrasonic Symposiums Proceedings: 46 (1975)Google Scholar