Forschungszentrum Julich Gmbh

Forschungszentrum Juelich Gmbh

Egon Zimmermann

Walter Glaas

Helmut Soltner

Horst Halling

Arre Verweerd

Andreas Kemna

Axel Tillmann

Ulrich Poppe

Bernd Jungbluth

Mikhail Faley

Knut Urban

Achim Mester

Mikkail Faley

Rolf Speen

Jan Van Der Kruk

Xihe Tan

Michael Ramm

Joachim Berwix

A method for calibration of electromagnetic induction measurement systems. The method includes transmitting, by at least one transmitter of an electric induction measurement system, a magnetic field as a primary signal, wherein the transmitting the magnetic field as the primary signal triggers a current in the soil which current generates a secondary signal, and recording, by a receiver of the electric induction measurement system, the secondary signal at each of at least two heights of the receiver relative to a soil to be measured in order to create an input vector that is a combination of soil properties and environmental properties that contain the properties of the electric induction measurement system, that contains a dataset of n conductivity values of n layers, and that creates, as a starting value, an initial value vector. The initial value vector includes assumptions and apparent electrical conductivities for m measurement heights.

Calibration method for electromagnetic induction measurement systems, and apparatus

The invention relates to a magnetic flow sensor () comprising a) a loop-shaped magnetic field conductor comprising a point () which expands to form a bar or a film (), a loop-shaped part () and at least one part () which guides back the magnetic field lines of the probe, b) SQUID (), c) and a diaphragm () comprising a hole (), whereby the part (&#x2033;) which guides the magnetic field lines of the probe back to the loop-shaped magnetic field conductor is connected to the diaphragm ().

Magnetic flow sensor comprising a magnetic field conductor and a hole diaphragm

An electrode, in the form of a spike, for insertion into a sample, has a large-area jacket adapted for applying an excitation current to the sample and a small-area tip electrically decoupled from the jacket, at which a potential measurement is made.

Device for the simultaneous application of electrical signals and measurement of the electrical potential in a sample

A method and apparatus for the rapid tomographic measurement of conductivity distribution in a sample in which current excitations or voltage excitation is applied to the sample via electrodes or the like and potential differences or magnetic field strengths association with those excitation fields are measured and analyzed, e.g. by a Fourier analysis.

Method and apparatus for rapid tomographic measurements of the electrical conductivity distribution of a sample

In order to measure magnetic characteristics of a sample, the latter is positioned above the SQUID so that both the SQUID and the sample are supported in a vessel in a gaseous nitrogen space above a liquid nitrogen coolant so that the measurement can take place at ambient pressure and in a nitrogen atmosphere.

Squid microscope

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Inden-Altdorf, Germany

Egon Zimmermann