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:
Jul. 19, 2016
Filed:
Jul. 23, 2013
Ifm Electronic Gmbh, Essen, DE;
Walter Reichart, Fronreute, DE;
Christian Kreisel, Kressbronn, DE;
Ralf Kriesen, Amtzell, DE;
Markus Körber, Immenstaad, DE;
Sebastian Liehr, Wasserburg, DE;
Werner Hoch, Tettnang, DE;
IFM ELECTRONIC GMBH, , DE;
Abstract
A magnetoinductive flowmeter for measuring the flow rate of a flowing, conductive medium with a capacitive measuring apparatus for detecting empty pipes is provided. In order to improve the detection of empty pipes and, in particular, the capacitive coupling to the medium, the invention provides for the measuring apparatus for detecting empty pipes to comprise a sheet-like electrode in each case and a counterelectrode which form a measurement capacitance Cwhich is dependent on the medium and on the degree of filling of the measuring tube; for the measuring tube to have a wall thickness which is reduced in order to maximize the measurement capacitance Cat least in the region of the electrode and the counterelectrode; and for the measuring tube to be surrounded by a metal supporting housing, wherein, in order to maintain the pressure resistance of the measuring tube, a hollow-walled supporting body for minimizing the influence of parasitic capacitances on the measurement capacitance Cis arranged in each case in the region of the reduced wall thickness between the electrode and the inner wall of the supporting housing and between the counterelectrode and the inner wall of the supporting housing and supports the measuring tube against the supporting housing in each case.