A Microwave Technique for Detecting Water Deposits in an Air Flow Pipelines
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A Microwave Technique for Detecting Water Deposits in an Air Flow PipelinesAbstract
A simple microwave method is used to determine thin layers of water inside the air or compressed-air carrying pipes of pneumatic systems. The technique proposed here is based on the shift in the resonant frequency with the changing air-water ratio within the pipe. A calibration chart relating the resonant frequency and thickness of water layer is presented and experimentally verified. Experimental results agreed well with the simulated response, particularly for thin water layers, which are difficult to detect accurately using existing methods.
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M. Bérard and I. Babelli, "System and
method for measuring flow in a pipeline",
WO 2006/072274, July 2006.
H. Yeung and A. Ibrahim, “Multiphase
flows sensor response database”, Flow
Measurement and Instrumentation, vol. 14,
pp. 219-223, 2003.
H. V. Santen, Z. I. Kolar, and A. M.
Scheers, “Photon energy selection for dual
energy • and/or x-ray absorption
composition measurements in oil–water–gas
mixtures”, Nucl. Geophys., vol. 9, pp. 193–
, 1995.
D. Marioli, E . Sardini, and A . Taroni,
“Measurement of small capacitance
variations”, IEEE Trans. Instrum. Meas.,
vol. 40, no. 2, pp. 426-428, April 1991.
E. Dykesteen, A. Hallanger, E. A. Hammer,
E. Samnoy, and R. Thorn, “Non-intrusive
three-component ration measurement using
an impedance sensor”, J. Phys. E: Sci.
Instrum., vol. 18, pp. 540–54, 1985.
R. Knochel and M.Weiss, “Novel methods
of measuring impurity levels in liquid
tanks”, Microwave Symposium Digest, IEEE
MTT-S International, vol. 3, no. 8-13, pp.
-1654, June 1997.
I. Satoshi, H. Satoshi, O. Masayuki, and T.
Shogo, “Measurement of water level in a
monitoring system of a bathroom”, SICE
Annual Conf., pp. 1730-1734, August 2004.
S. A. Sovlukov and V. I. Tereshin,
“Measurement of liquefied petroleum gas
quantity in a tank by radio-frequency
techniques”, IEEE Trans. on Instrumentation
and Measurement, vol. 53, no. 4, pp. 1255-
, Aug. 2004.
C. Boyer, A . Duquenne, and G . Wild,
“Measuring techniques in gas-liquid and
gas-liquid-solid reactors”, Chemical
Engineering Science, vol. 57, pp. 3185-
, 2002.
S. S. Novikov, A. S. Maidanovskii, A. P.
Restov, and Yu. M. Andreev, “Microwave
level meter with wire line”, KORUS '99, vol.
, pp. 661-662, June 1999.
A. R. Von Hippel, Dielectric Materials and
Applications, MIT Press, 1954.
E. Nyfors, “Industrial microwave sensors –
A Review”, Subsurface Sensing Technology
and Application, vol. 1, no. 1, pp. 23 -43,
E. Nyfors and P. V. Vainikainen, Industrial
Microwave Sensors, Artech House, 1989.
A. Klein, “Microwave determination of
moisture in coal: Comparison of attenuation
and phase measurement”, Jour. Microwave
Power, vol. 16, no. 3-4, pp. 289-304, 1981.
