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:
Mar. 14, 2023
Filed:
Sep. 16, 2014
Rosen Swiss Ag, Stans, CH;
Daniel Molenda, Lingen, DE;
Werner Thale, Wallenhorst, DE;
Bernhard Reining, Emsbüren, DE;
Michael Rapp, Lingen, DE;
Abstract
A method is disclosed for determining a mechanical-technological characteristic variable of ferromagnetic metals, preferably ferromagnetic steels, and in particular fine-grained steels, which are used in pipelines. A magnetization apparatus, which has at least one permanent magnet or solenoid, magnetizes the metal which is to be determined, and a sensor apparatus comprising a transmission coil generates a magnetic field which interacts with the magnetic field which is generated by the magnetization apparatus in the metal, and which generates an eddy current. The eddy current is generated in the magnetically at least substantially saturated metal, and the eddy current is measured by an eddy current sensor of the sensor apparatus. A magnetic field strength sensor measures the magnetic field of the metal at least close to the surface, and the electrical conductivity or the specific electrical resistance of the metal is ascertained from the data from the eddy current sensor on the basis of reference data by means of an evaluation apparatus. The characteristic variable of the metal is derived from the conductivity or the resistance, and also an inspection gauge for carrying out a method of this kind.