Balluff Gmbh

Gebhard Balluff Fabrik Feinmechanischer Erzeugnisse Gmbh & Co.

Michael Friedrich

Sorin Fericean

Ernst Gass

Zoltán Kántor

Joachim Nagel

Ümit Koyuncu

Michael Grandl

Marc Bisch

Zoltán PÓLIK

An electronic module for an inductive sensor apparatus is provided which comprises at least one voltage-controlled current source, a current source port connected to the at least one voltage-controlled current source for providing a voltage-controlled current from the at least one voltage-controlled current source, an adder device, an adder input port connected to the adder device, and an adder output port which is connected to the adder device. The current source port is connectable to an electrical resonant circuit and/or to a coil element. The adder input port is connectable to the current source port or to at least one further coil element. By way of the adder device, an operation of addition and/or subtraction of a voltage applied to the adder input port and at least one offset voltage is performed. An evaluation signal for evaluation by an evaluation device is providable at the adder output port.

Electronic module, sensor apparatuses, set of sensor apparatuses and method for operating a sensor apparatus

A sensor apparatus for detecting a target object is provided, together with a corresponding method for operating the sensor apparatus. The sensor apparatus comprises a transmitter device which is operated by periodic excitation signals at a basic frequency, a receiver device which couples to the transmitter device, wherein the coupling is dependent on a relative position of the target object with respect to the receiver device, and the receiver device delivers signals at the basic frequency which are dependent on the relative position of the target object with respect to the receiver device. A threshold value checking device checks whether signals lie within or outside a threshold value range. A linking device acts on signals from the receiver device or signals derived therefrom in such a way that signals or signal combinations are shifted into the threshold value range insofar as they previously lay outside this range.

Sensor apparatus for detecting a target object and a method for operating a sensor apparatus for detecting a target object

In order to improve a sensor for detecting an electrically conductive or netizable object with an oscillator comprising a resonant circuit including an inductance and a capacitance, the resonant circuit impedance depending on a damping distance between the inductance and the object and rising steeply in the range of small damping distances, further rising less steeply in the range of medium damping distances and substantially having a constant value in the range of large damping distances, and a closed adaptive loop stage supplying a loop current for the resonant circuit and generating a course of an amplitude value dependent on the damping distance, and an evaluation circuit detecting an oscillator voltage applied to the resonant circuit, such that the oscillator also oscillates in the range of small damping distances and has a characteristic curve, with which the oscillator voltage varies with the damping distance also in the range of small damping distances, it is suggested that the course of the amplitude value of the loop current in the range of small damping distances has at least one oscillation-maintaining segment, the gradient of which is smaller than the gradient of the course of the amplitude value in the range of medium damping distances.

Inductive sensor responsive to the distance to a conductive or

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Wolfschlugen, Germany

Michael Friedrich