Title :
An electromagnetic current meter-based system for application in unsteady flows
Author :
Sorrell, F. Yates ; Curtin, Thomas B. ; Feezor, Michael D.
Author_Institution :
Dept. of Mech. & Aerosp. Eng., North Carolina State Univ., Raleigh, NC, USA
fDate :
10/1/1990 12:00:00 AM
Abstract :
A flexible configuration for an array of sensors has been developed for measurements in energetic regions of the ocean where the flow has high spatial and temporal variability. Central to the system is a two-axis electromagnetic current meter that measures the flow through a ducted volume containing a uniform magnetic field and nonprotruding electrodes flush with the duct surfaces. This geometry minimizes the electrode boundary-layer effect on the output, thus improving calibration and reducing fouling and damage potential. An inexpensive amplifier designed for low signal-to-noise ratios is employed to produce very low zero drift during operation
Keywords :
electric sensing devices; electromagnetic devices; flow measurement; oceanographic equipment; oceanographic techniques; EM current meter; amplifier; array of sensors; duct; electrical circuit; electrode boundary-layer effect; electromagnetic current meter-based system; instrumentation; measurement equipment; ocean; temporal variability; two axis instrument; unsteady flow; Electrodes; Electromagnetic fields; Electromagnetic measurements; Energy measurement; Fluid flow measurement; Magnetic field measurement; Magnetic sensors; Oceans; Sea measurements; Sensor arrays;
Journal_Title :
Oceanic Engineering, IEEE Journal of
