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RESEARCH PAPERS

Errors in Cross-Correlation Peak Location

[+] Author and Article Information
G. D. Lassahn, A. G. Baker

EG&G Idaho, Inc., Idaho Falls, Idaho 83415

J. Dyn. Sys., Meas., Control 104(2), 194-199 (Jun 01, 1982) (6 pages) doi:10.1115/1.3139696 History: Received August 14, 1981; Online July 21, 2009

Abstract

A method for determining the uncertainty in the location of a cross-correlation peak is derived and two examples are examined. When a cross-correlation peak location is used in transit time flowmeters as a measurement technique for fluid-flow velocity, turbulence in the fluid increases the peak location uncertainty. This effect is examined for two models of turbulence. Also examined is the bias or shift in the peak location due to time response or filter mismatch.

Copyright © 1982 by ASME
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