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:
Sep. 11, 2001
Filed:
Feb. 02, 1999
Roland Mandl, Ortenburg, DE;
Felix Mednikov, Samara, RU;
Mark Netschaewsky, Samara, RU;
Karl Wisspeintner, Ortenburg, DE;
Microepsilon Messtechnik GmbH & Co. KG, Ortenburg, DE;
Abstract
An eddy current sensor (,) has at least one measuring coil (,) that can be supplied with an alternating current, and an evaluation circuit (,). The eddy current sensor allows the temperature influences on the impedance of the measuring coil to be reliably compensated with a simple design and an evaluation circuit. For this purpose, the eddy current sensor has a compensating coil (,) which can also be supplied with an alternating current and which is arranged closely to the measuring coil, i.e. in thermal contact therewith, in such a way that the electric fields of compensating coil (,) and measuring coil (,) are orthogonal to each other. More particularly, the measuring coil (,) is in an annular form and the compensating coil (,) is wound around the measuring coil in the form of a torus.