Calibration Accuracy for Constant Temperature Thermal Anemometer
Publication: Journal of Hydraulic Engineering
Volume 130, Issue 8
Abstract
Thermal anemometry is widely used to measure fluid velocity and boundary shear stress. Sensor calibration is required and results in a nonlinear equation with anemometer voltage as a function of fluid velocity or shear stress. Uncertainties in the parameters of the nonlinear equation are a source of uncertainty in measured values. A method for quantifying the calibration accuracy is presented using regression analysis with 95% confidence and prediction intervals. The proposed method is applied to shear stress measurements of a calibrated flush-mounted hot-film sensor. Shear stresses ranged from 0.6 to 6.8 Pa. Calibration accuracy was found to be within 15% of the absolute shear.
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Information
Published In
Journal of Hydraulic Engineering
Volume 130 • Issue 8 • August 2004
Pages: 833 - 836
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jul 24, 2002
Accepted: Jan 20, 2004
Published online: Jul 15, 2004
Published in print: Aug 2004
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