Micro-epsilon Messtechnik Gmbh & Co. Kg

Heidelberger Druckmaschinen Ag

Buhler Ag

Rieter Ingolstadt Spinnereimaschinenbau Ag

Micro-epsilon Messetechnik Gmbh

Karl Wisspeintner

Felix Mednikov

Roland Mandl

Martin Sellen

Thomas Wolf

Franz Hrubes

Bernhard Messerschmidt

Robert Wagner

Peter Denz

Christian Pfaffinger

Guenter Schallmoser

Bernhard Zintzen

Axel Seikowsky

Günter Schallmoser

Thomas Wisspeintner

Walter Uhlmann

Mark Netschaewsky

Martin Dumberger

Werner Groemmer

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 calibration of a thickness gauge is provided in which the thickness gauge measures the thickness of a measured object in a stipulated measurement direction with at least one displacement sensor, operating contactless or by scanning, a reference object with known thickness and shape being brought into at least one partial area of the measurement field of the at least one displacement sensor.

Method for calibrating a thickness gauge

A device and method for checking surfaces in the interior of holes, depressions, or the like. The device and method are developed in such a manner that a multicolor light beam can be produced with a light source, wherein a light beam, due to the chromatic aberration of the imaging optics, can be focused onto several points at different distances from the imaging optics, such that the distance to the surface can be determined from the spectrum of the detected light beam.

Device and method for inspecting surfaces in the interior of holes

An imaging device () for a printing form (), in particular in a printing unit () of a printing press (), having at least one light source () and an imaging optics () for projecting the at least one light source () onto the printing form (), at least one optical element (), in particular a lens, of the imaging optics (), being movable by way of an actuator element (), and the imaging optics () including one sensor () for measuring the actual position of the optical element (), the sensor having one coil () and at least one sensor target (). The sensor () is assigned to a control element () for adjusting the position of the optical element () via the actuator element (), so that a highly precise, dynamic positioning of the optical element () can be achieved.

Imaging device for a printing press

A method for linearizing a nonlinear curve with a linearization circuit (), wherein the curve represents the relationship between input signals and output signals of a sensor. An output signal () of the sensor, which is respectively associated with an input signal, is displayed with respect to a simple and cost favorable linearization such that the adjustment of the linearization circuit () essentially occurs in an automated way utilizing sequence controller (). A corresponding circuit is also described for practicing the method.

Method and circuit for linearizing nonlinear curves

A circuit arrangement () for activating a sensor and evaluating its signals, in particular for parametric sensors with complex impedances. The circuit arrangement comprises at least one sensor () for acquiring mechanical data. In order to minimize or largely prevent temperature caused disturbances in a constructionally simple layout, the measuring signal, the absolute temperature, and the gradient temperature of the sensor () are acquired simultaneously, preferably by means of a microprocessor or microcomputer (). A corresponding method for activating sensors and evaluating their signals is also described.

Circuit arrangement and method for controlling and evaluating signal detectors

Eddy current sensor with an exploring coil ( ) wound on a coil form ( ), with two terminals ( ), a source of ac voltage, an electrically conductive measuring probe ( ), and an evaluation circuit, wherein the measuring probe ( ) is displaceable relative to the exploring coil ( ), and the evaluation circuit generates an evaluation signal as a function of the position of the measuring probe ( ), wherein the eddy current sensor comprises an electrode ( ) with a tap ( ) for enabling electrical contact, the electrode forming together with the windings of the exploring coil ( ) and an intermediate layer ( ) a component with distributed electromagnetic parameters, whose output signals are used to determine the position of the measuring probe ( ).

Eddy current sensor

A sensor (,) is proposed for noncontacting thickness gauging on films (,), in particular blown films, with a sensor head (,) and a mount (,) for the sensor head (,), which provides reliable measuring results despite transportation-caused movements of the film (,), and which is particularly suitable for a continuous quality control during the production process. In accordance with the invention, the sensor head (,) comprises at least one noncontacting sensor element for gauging the thickness in accordance with the physical properties of the film (,). Furthermore, the position of the sensor head (,) is adjustable such that the sensor head (,) is held during the entire measuring process at a predeterminable, at least largely constant distance from the film (,).

Non-contact film thickness gauging sensor

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.

The invention relates to the correction of an error-prone measuring signal of a pair of scanning rollers. The measuring signal is influenced by the circularity error of the pair of scanning rollers and/or by the eccentric mounting of the pair of scanning rollers. The pair of scanning rollers is used to measure the thickness of a fiber fleece or fiber sliver on a pre-spinning machine in the textile industry. The occurrence of a periodic error value in the measuring signal due to circularity error and/or eccentricity of the pair of scanning rollers is detected. The error value is stored in a position-related manner for one revolution of the scanning rollers and the stored error value is used in the operation of the scanning rollers within the cycles of rotation for the correction of the current, position-synchronous measuring signals.

Correction of a measuring signal obtained from a pair of scanning

In order to determine the contents of solids in a heated elongated slug of thixotropic metal having a longitudinal axis, there is an apparatus comprising an inductive heating coil with electrical winding. Moreover, a sensor includes at least one measuring coil arranged between the heating coil and the slug. This sensor provides an output signal which corresponds to the contents of solids demanded.

Growing community of inventors

Ortenburg, Germany

Karl Wisspeintner