The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2003
Filed:
Jul. 19, 2001
Applicant:
Inventors:
Zongjin Li, Clear Water Bay, HK;
Wenlai Li, Clear Water Bay, HK;
Assignee:
The Hong Kong University of Science and Technology, Hong Kong, HK;
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/772 ; G01R 2/708 ; G01R 3/312 ;
U.S. Cl.
CPC ...
G01N 2/772 ; G01R 2/708 ; G01R 3/312 ;
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.