Abstract: A method for wireless interrogation of data from a passive element. A first high frequency signal sent to the element excites the element to transmit a response signal which is received and mixed with a reference signal in a mixer, generating a data signal. The data signal is evaluated to extract data. A second high frequency signal generated from the same frequency reference as the first frequency signal is used as a reference signal. A control signal is generated by mixing the reference and first frequency signals. The data signal is bandpass-filtered in analog form and is converted, with the control signal, to a digital signal and digital control signal which are then each bandpass-filtered in digital form. The digital data and digital control signals are correlated to form a result signal so that a digital coherence is achieved. Raw data representing the data are obtained from the result signal.

Abstract: A method for setting or monitoring operating parameters of a workpiece processing machine having a tool holder and means for moving a workpiece and the holder relative to one another along a first axis. During milling of the holder fitted with a workpiece and during application of the tool to a workpiece, values for at least one measured variable are registered and recorded. The variables include an axial force acting in a direction parallel to the first axis, a torque relative to the first axis or to an axis oriented parallel to the first axis, and bending torques or bending torque components according to direction and amount. The values are used to set the operating parameters with respect to an extended service life of the tool in conjunction with a processing time falling below a maximum machining time, monitoring tool wear or a machine error.

Abstract: A method for ascertaining deformations of a geometric body or for measuring forces or torques acting thereon using force measuring sensors or deformation measuring sensors. A plurality of such sensors are arranged on the geometric body in at least two groups. A first group of sensors registers forces acting on the geometric body or deformations of the geometric body in a first spatial direction with reference to a coordinate system fixed relative to the geometric body. A second group of sensors registers forces acting on the geometric body or deformations thereof in a second spatial direction with reference to the coordinate system fixed relative to the geometric body, which is independent of the first spatial direction. Signal outputs of the sensors are compared to one another for the purpose of registering and evaluating signals and for determining or assessing force components or deformation components acting in different spatial directions.

Abstract: A stress measurement sensor provided with a sensor element that operates according to the SAW principle, comprising a base composed of a first material and the sensor element, which is fixed to the base with a joining material, is to be developed such that it can also be used at higher temperatures and has improved measurement properties. In addition, it is suggested that the joining material be a glass solder.

Abstract: The invention relates to a transponder system for the contactless inductive power transmission of a stationary part having at least one read coil (2) disposed on the stator (1) to a rotating part having at least one transponder coil (4) disposed on a spindle (3). The aim of the invention is to provide a transponder system of the aforementioned kind which can be used for self-sufficient sensor applications even in the vicinity of metal materials and noise fields caused by electric motors conventional in mechanical engineering. For this purpose, the surrounding (5) of the read coil (2), especially the stator is produced from a material having little magnetic permeability and good electrical conductivity, preferably aluminum. The transponder coil (4) and/or the read coil (2) are disposed as flat coil (6) on the inside and/or outside of a cylindrical periphery (9, 10) of the stator and/or rotor (11).

Abstract: A chuck-integrated force-measuring system for determining cutting forces at the cutting tool tip of a rotating tool, for example a drill or milling cutter having at least one measuring sensor, as well as a measured-value processing station. The at least one measuring sensor is designed as a strain sensor which is placeable on a tool holder of a machine tool. A measuring hub assembly is also provided which is insertable as an adapter piece into the chuck of the machine tool and is designed with its own chuck for receiving the tool, the at least one measuring sensor being integrated in the adapter piece.