Title :
Dry calibration procedure of electromagnetic flowmeter for open channels
Author :
Michalski, Andrzej
Author_Institution :
Inst. of the Theory of Electr. Eng. & Electr. Meas., Warsaw Univ. of Technol., Poland
fDate :
4/1/2000 12:00:00 AM
Abstract :
This paper presents a simple approach to a dry calibration procedure for the electromagnetic flowmeter for both conducting and nonconducting open-flow channels. The author focuses on two main problems: variable water level in the measurement zone and variable water or ground conductivity and their influence on a flow signal. Based on the existing numerical model of electromagnetic flowmeter, the author describes the main idea of transfer function calculation with a few exemplary results. As an approximation instrument for a final form of correction function, the sigmoidal two-layer neural network has been applied
Keywords :
calibration; channel flow; electromagnetic devices; flowmeters; transfer functions; Poisson equation; backpropagation; conducting open-flow channels; correction factors; correction function; dry calibration procedure; electromagnetic flowmeter; nonconducting open-flow channels; numerical model; sigmoidal two-layer neural network; transfer function calculation; variable ground conductivity; variable water conductivity; variable water level; Calibration; Coils; Conductivity; Density measurement; Electrodes; Electromagnetic measurements; Fluid flow measurement; Magnetic field measurement; Magnetic liquids; Ultrasonic variables measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
