Electricity: measuring and testing – Electrolyte properties – Using a conductivity determining device
Reexamination Certificate
2005-09-06
2005-09-06
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Electrolyte properties
Using a conductivity determining device
C324S603000, C324S605000, C600S547000, C600S393000, C378S021000
Reexamination Certificate
active
06940286
ABSTRACT:
Methods and apparatus are provided for obtaining a representation of the distribution of electrical impedance within a multiphase flow with an electrically continuous or discontinuous principle flow contained within an electrically conductive solid ring electrode, including providing a plurality of mutually spaced electrical contacts mounted at the outside wall of the ring and electrically contacting with the ring, applying currents or voltages to the ring from the electrical contacts, generating a more homogeneous electric field distribution within the material, measuring voltage or current distribution alone the ring from other electrical contacts, relatively intensifying the imaging sensitivity at the central area of the sensing domain using a π/2 angle sensing strategy and reconstructing the representation of the impedance distribution using CG method with an error processing strategy.
REFERENCES:
patent: 4486835 (1984-12-01), Bai et al.
patent: 4617939 (1986-10-01), Brown et al.
patent: 4920490 (1990-04-01), Isaacson
patent: 5272624 (1993-12-01), Gisser et al.
patent: 6501984 (2002-12-01), Church et al.
patent: 2019579 (1979-10-01), None
patent: 2119520 (1983-11-01), None
patent: 2160323 (1985-12-01), None
patent: WO 95/24155 (1995-09-01), None
patent: WO 98/23204 (1998-06-01), None
International Search Report dated Mar. 25, 2002 for PCT/GB01/05636.
Wang et al. “Modelling and analysis of electrically conducting vessels and pipelines in electrical resistance process tomography,”IEE Proc.-Sci. Meas. Technol., vol. 412, No. 4, Jul. 1995.
Dickin et al. “Electrical resistance tomography for process applications,”Measurement Science and Technology, vol. 7, No. 3, Mar. 1, 1996, pp. 247-260.
Tai et al. “An experimental electrical impedance tomography system,”Proceedings of the Region Ten Conference, Beijing, Oct. 19-21, 1993, vol. 3.
Seleghim et al. “Direct imaging of two-phase flows by electrical impedance measurements,”Measurement Science and Technology, vol. 9, No. 9, Sep. 1998, pp. 1492-1500.
Wang et al. “Detecting non-uniform foam density using electrical resistance tomography,”Chemical Engineering Science, vol. 54, 1999, pp. 707-12. No month available.
Geselowitz, David B. “An Application of Electrocardiographic Lead Theory to Impedance Plethysmography,”IEEE Transcations on Biomedical Engineering, vol. BME-18, No. 1, Jan. 1971.
Yorkey et al. “Comparing Reconstruction Algorithms for Electrical Impedance Tomography,”IEEE Transactions on Biomedical Engineering, vol. BME-34, No. 11, Nov. 1987.
Lehr, John, “Short Communications: A Vector Derivation Useful in Impedance Plethysmographic Field Calculations,”IEEE Transactions on Biomedical Engineering, vol. BME-19, Mar. 1972.
Murai et al. “Electrical Impedance Computed Tomography Based on a Finite Element Model,”IEEE Transactions on Biomedical Engineering, vol. BME-32, No. 3, Mar. 1985.
Wang et al. “Electrical Resistance Tomographic Sensing Systems for Industrial Applications,”Chem. Eng. Comm., 1999, vol. 175, pp. 49-70. No month available.
Barber et al. “Applied potential tomography,”J. Phys. E: Sci. Instrum., vol. 17, 1984, pp. 723-33. No month avail.
Lucas et al. “Measurement of the solids volume fraction and velocity distributions in solids-liquid flows using dual plane electrical resistance tomography,”Flow Measurement and Instrumentation, vol. 10, 1999, pp. 249-58. No month.
Hoyle et al. “Multi-Sensor Process Tomography System Design: Part 1 -Systems and Hardware Engineering,” 1stWorld Congress on Industrial Process Tomography, Buxton, Greater Manchester, Apr. 14-17, 1999.
Brown et al. “Applied Potential Tomography -Data Collection Problems,”International Conference on Electric and Magnetic Fields in Medicine and Biology, Dec. 4-5, 1985.
Dyakowski et al. “On-line monitoring of dense phase flow using real time dielectric imaging,”Powder Technology, vol. 104, 1999, pp. 287-95. No month available.
Kotre, C.J. “EIT image reconstruction using sensitivity weighted filtered backprojection,”Phsiol. Meas.vol. 15, 1994, pp. A125-A136. No month available.
Lucas et al. “Measurement of the solids volume fraction and velocity distributions in solids -liquid flows using dual-plane electrical resistance tomography,”Journal of Flow Measurement and Instrumentation, Oct. 4, 1999. No month available.
Wang Mi
Yin Wuliang
Myers Bigel & Sibley & Sajovec
Nguyen Vincent Q.
University of Leeds
LandOfFree
Electrical impedance tomography does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical impedance tomography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical impedance tomography will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3407488