Micro-epsilon Messtechnik Gmbh & Co. Kg

Christian Pfaffinger

Felix Mednikov

Guenter Schallmoser

Thomas Wisspeintner

Johann Hofer

Karl Wisspeintner

Werner Groemmer

A sensor arrangement for determining a position and/or a change in the position of a measurement object is described, wherein the sensor arrangement has a magnet and a magnetic field sensor which can be moved relative to one another in a direction of movement. The magnet generates a magnetic field. Movements of the magnet and of the measurement object or movements of the magnetic field sensor and of the measurement object are coupled. To achieve the greatest possible measurement range with a characteristic curve which is as linear as possible at the same time, the sensor arrangement comprises a rod-shaped body which is made from a ferromagnetic material and has a considerably larger dimension in the longitudinal direction than in the transverse direction. A relative movement takes place between the rod-shaped body and the magnet, wherein the rod-shaped body can be connected to the magnet. The magnetic field from the magnet is at least partially directed in the direction of the magnetic field sensor. In this case, the rod-shaped body is arranged parallel to the direction of movement. The magnetic field sensor is arranged on a longitudinal side of the rod-shaped body and is configured to generate a measurement signal from a portion of the magnetic field which emerges from the rod-shaped body at the magnetic field sensor. As a result, the position and/or change in the position of the measurement object can be determined from the measurement signal.

Sensor arrangement and method for determining a position and/or a change in the position of a measurement object

The invention relates to a sensor element for an inductive sensor used for a displacement or distance measurement by means of a magnetic field that varies according to the distance from the measurement object but that remains temporally constant. In said sensor, thin ferromagnetic material is integrated into a substrate. The invention also relates to a sensor comprising said sensor element and to a method for producing the sensor element.

Inductive sensor comprising integrated soft magnetic layer and method for the production thereof

A method for detecting magnetic fields, particularly for detecting the position of objects with a preferably oblong, soft-magnetic element, which is connected to electronics, with via the electronics the impedance of the soft-magnetic material is measured, characterized in that a magnetic field is used in which by the position of an object which is located in an arrangement with the soft-magnetic material the magnetic field develops at the location of the soft-magnetic material, with the magnetic permeability &#x3bc; of the soft-magnetic material adjusting, depending on the magnetic field and thus the position of the object. A respective device serves for applying the method according to the invention.

Method and apparatus for sensing magnetic fields

A circuit system for evaluating a sensor, wherein the circuit system comprises two complex impedances (), wherein the complex impedances () are each part of a resonant circuit in which the complex impedances () can be excited to perform oscillations, and wherein at least one of the two complex impedances () are part of the sensor, is characterized with respect to a particularly cost-effective and as simple a circuit design as possible in that a counter () and a switch apparatus () are provided, wherein the counter () can be used to alternately count the oscillations of one of the two resonant circuits, the switch apparatus () can be switched when a specifiable counter reading has been reached, and the switch signal of the switch apparatus serves as a pulse width-modulated output signal () for the circuit system.

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Ruhstorf a.d. Rott, Germany

Christian Pfaffinger