Title:
METHOD AND SYSTEM FOR MEASURING FLOW LAYER VELOCITIES USING CORRELATION VELOCITY MEASURING SONAR
Document Type and Number:
WIPO Patent Application WO/2004/083890
Kind Code:
A1
Abstract:
The present inventio discloses a method and a system for measuring flow layer velocities using correlation velocity measuring sonar. The present invention provides a new theory expression for fluid medium sonar array temporal and spatial correlation function, the velocities of each flow layer are derived from fitting operation between experimental data and a theory function, or fitting operation between absolute value operated and localizing processed experimental data and a theory function. The fluid medium sonar array temporal and spatial correlation function of the present invention is succinctly expressed by Kummer function, and well coincided with the experiments. This function is applicable not only to far field region, i.e. planar wazve region, but also Fraunhofer region, i.e. spherical wave region. The present inventio has the merits of high measurement accuracy, small calculation amount, good robustneess and fast convergence rate.
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Inventors:
ZHU WEIQING (CN)
WANG CHANGHONG (CN)
WANG CHANGHONG (CN)
Application Number:
PCT/CN2003/001059
Publication Date:
September 30, 2004
Filing Date:
December 12, 2003
Export Citation:
Assignee:
INST OF ACOUTICS CHINESE ACADE (CN)
ZHU WEIQING (CN)
WANG CHANGHONG (CN)
ZHU WEIQING (CN)
WANG CHANGHONG (CN)
International Classes:
G01P5/24; G01S15/60; (IPC1-7): G01S15/60; G01P5/24
Foreign References:
| US5315562A | 1994-05-24 |
Attorney, Agent or Firm:
Shanghai Xin, Tian Patent Agent Co Ltd (Shanghai 0, CN)
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