Method and apparatus for rapid tomographic measurements of the electrical conductivity distribution of a sample
First Claim
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1. A method for rapid tomographic measurement of conductivity distribution in a sample, comprising the steps of:
- (a) launching electrical excitation signals simultaneously into a sample from a multiplicity of locations distributed in said sample;
(b) measuring at a multiplicity of locations in said sample at least one parameter selected from the group which consists of potential difference and magnetic field strength resulting from said electrical excitation signals; and
(c) correlating the measured potential differences or magnetic field strengths with the launched excitation signals to provide conductivity distribution cross section in said sample.
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Abstract
A method and apparatus for the rapid tomographic measurement of conductivity distribution in a sample in which current excitations or voltage excitation is applied to the sample via electrodes or the like and potential differences or magnetic field strengths association with those excitation fields are measured and analyzed, e.g. by a Fourier analysis.
24 Citations
34 Claims
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1. A method for rapid tomographic measurement of conductivity distribution in a sample, comprising the steps of:
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(a) launching electrical excitation signals simultaneously into a sample from a multiplicity of locations distributed in said sample;
(b) measuring at a multiplicity of locations in said sample at least one parameter selected from the group which consists of potential difference and magnetic field strength resulting from said electrical excitation signals; and
(c) correlating the measured potential differences or magnetic field strengths with the launched excitation signals to provide conductivity distribution cross section in said sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for the rapid tomographic measurement of a conductivity distribution in a sample, comprising:
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an electrical excitation source coupled with said sample for applying electrical excitation signals thereto;
at least one device coupled with said sample for measuring a potential difference or magnetic field strength therein in proportion to the electrical excitation signals supplied thereto; and
circuitry for correlating a measured potential difference or magnetic field strength proportionally with the supplied electrical excitation signals. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification