Contactless, transformer-based measurement of the resistivity of materials
AssigneeThe Hong Kong University of Science and Technology
InventorsZongjin Li, Wenlai Li
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Abstract
The present invention provides an apparatus and method for measuring the resistivity of a sample of cement-based material. A transformer is formed with a primary coil, a secondary formed by means of a sample of said cement-based material, means for supplying a voltage to said primary, means for measuring the voltage induced in said sample, and means for measuring the current induced in said sample. The resistance of the sample can be measured and thus the resistivity of the concrete sample can be calculated.
Claims11
Apparatus for measuring the resistivity of a sample of material, comprising:
- a transformer formed with a primary coil, a secondary formed by a sample of said material that is inductively coupled to said primary coil, means for supplying a voltage to said primary, means for measuring the voltage induced in said sample, and means for measuring the current induced in said sample.
A method for measuring the resistivity of a sample of material, comprising:
- (a) forming a sample of said material as a secondary of a transformer,
- (b) applying a voltage to a primary of said transformer,
- (c) measuring the voltage induced in said sample,
- (d) measuring the current induced in said sample, and
- (e) determining the resistivity of said sample from the results of steps (c) and (d).
Dependencies are inferred from the claim text.