Abstract: A method for evaluating measuring signals of an electromagnetic field is disclosed which is in interaction with an electrically conductive fluid for detecting components in the fluid which differ from the electric conductivity of the fluid, with the measuring signals being divided into at least two channels and being evaluated in order to detect different distributions and concentrations in the fluid.
Type:
Grant
Filed:
July 24, 2003
Date of Patent:
June 28, 2005
Assignee:
AMEPA Angewandte Messtechnik und Prozessautomatisierung GmbH
Abstract: A device for detecting slag flowing with a stream of molten metal dischar through an outlet opening in a metallurgical vessel includes a sensor positioned in the area of a base plate of the vessel to surround the stream of molten metal without being contacted thereby. The sensor has a sending coil and a receiving coil associated with a reference coil. At least the sending and receiving coils are positioned within a housing formed of a non-magnetic material. The housing encompasses the coils and defines therearound a protective casing that alters electromagnetic fields emanating from the base plate and the stream of molten metal and that is resistant to mechanical stresses.
Type:
Grant
Filed:
July 5, 1988
Date of Patent:
December 19, 1989
Assignee:
AMEPA Angewandte Messtechnik und Prozessautomatisierung GmbH
Abstract: A method and an apparatus for the detection of slag co-flowing within a sam of molten steel being poured from metallurgical vessel, more particularly during continuous casting, makes it possible to detect even a small quantity of slag in the emerging flow of molten metal without requiring the removal of the shielding for the pouring stream, or without interfering with the pouring, by measuring changes in the electrical conductivity of the pouring system by means of electromagnetic fields. To this end, one or more transmitter coils and receiver coils are mounted fixedly around the pouring stream. The transmitter coils are fed with a current containing several frequencies, and the magnitude and phase position of the voltage induced in the receiver coils are evaluated frequency-selectively so as to increase the sensitivity, the measuring transducer being operated in a bridge circuit.
Type:
Grant
Filed:
June 24, 1986
Date of Patent:
March 28, 1989
Assignee:
AMEPA Angewandte Messtechnik und Prozessautomatisierung GmbH
Inventors:
Wolfgang Theissen, Edmund Julius, Franz R. Block