Abstract: A system composed of a servicing device and a field device having at least one sensor unit for determining and/or monitoring at least one process variable. At least one electronics unit, which has an evaluation unit, wherein the evaluation unit receives measurement signals from the sensor unit and evaluates such with reference to the process variable, and at least one switch element actuatable contactlessly from outside of the field device. The servicing device is embodied to modulate the switch state of the switch element for transmission of field device specific data to the electronics unit. Furthermore, a field device, a servicing device and a method for communication between field device and servicing device are claimed.

Abstract: A pressure sensor comprises an operating circuit and a pressure-measuring cell comprising a counter body, a measurement membrane, which is arranged on the counter body and can be deformed by a pressure to be measured, and a capacitive transducer, which has at least one membrane electrode arranged on the measurement membrane and at least one counter-body electrode arranged on the counter body. The capacitance between the membrane electrode and the counter-body electrode depends on a pressure-dependent deformation of the measurement membrane, wherein at least the membrane electrode has a temperature-dependent impedance. The operating circuit is designed to sense at least one capacitance between the at least one counter-body electrode and the at least one membrane electrode and to provide a pressure measurement value on the basis of at least one capacitance and to determine the impedance of the membrane electrode—particularly, the ohmic portion of the impedance of the membrane electrode.

Abstract: A method for determining and or monitoring at least one process- and/or system specific parameter in automation technology. An oscillatable system is provided, which interacts with a medium located in a container, wherein the oscillatable system is excited to oscillate via a real input signal, wherein the real output signal of the oscillatable system is ascertained, wherein the real output signal is digitized and a real output sequence yu(k) is produced. The real input signal is digitized and a digital input sequence (u(k)) is produced, wherein the digital input sequence (u(k)) is fed to a function block (model), which provides at least one mathematical model of the oscillatable system in interaction with the medium. The mathematical model is defined by a number of process- and/or system specific parameters, wherein via the mathematical model a virtual output sequence (ym(k)) is produced, wherein the virtual output sequence ym(k) is compared with the real output sequence yu(k).

Abstract: A field device for determining or monitoring a physical or chemical process variable in automation technology, comprising at least one transmitting/receiving element, wherein an FPGA component is provided, the transmitting/receiving element is configured in the form of a spiral from existing internal connecting lines of the FPGA component, and the spiral of the transmitting/receiving element transmits data inductively to a second transmitting/receiving element in the form of a spiral.

Abstract: A method for determining frequency components of a discrete time signal, comprising steps as follows: transforming the discrete time signal into the frequency domain by means of a fast Fourier transformation, wherein a frequency spectrum is obtained as a sequence of frequency sample values, detecting peaks in the frequency spectrum, introducing at least one additional frequency support point in the vicinity of a detected peak, determining a frequency amplitude at the at least one additional frequency support point by means of the Goertzel algorithm, and determining the position of the peak maximum of the detected peak by applying both the frequency sample values delivered by the fast Fourier transformation as well as also the frequency amplitude at the at least one additional frequency support point.

Abstract: A pressure-measuring cell having a ceramic measuring membrane and a ceramic counter body, wherein the measuring membrane is joined to the counter body in such a way that a pressure chamber is formed between the measuring membrane and the counter body. The pressure-measuring cell also has a capacitive transducer for detecting a pressure-dependent deformation of the measuring membrane, which capacitive transducer has at least one membrane electrode arranged on the measuring membrane and at least one electrode on the counter body side, wherein according to the invention at least one membrane electrode comprises a titanium oxide.

Abstract: An assembly comprising: two ceramic bodies, which are joined by means of a joint of an active hard solder, or braze, wherein the active hard solder, or braze, has a continuous core volume, which is spaced, in each case, from the ceramic bodies by at least 1 ?m, and an average composition CK with a liquidus temperature Tl(CK), wherein the composition CK has a coefficient of thermal expansion ?(CK), wherein ?(CK)=m·?(K), wherein m?1.5, especially m?1.3 and preferably m?1.2, wherein ?(K) is the average coefficient of thermal expansion of the ceramic material of the ceramic bodies, wherein the joint has boundary layers, which border on the ceramic body, wherein at least one of the boundary layers, which lies outside of the core volume, has an average composition CB with a liquidus temperature Tl(CB), which lies not less than 50 K, preferably not less than 100 K, and especially preferably not less than 200 K, under the liquidus temperature Tl(CK) of the average composition CK of the core volume.

Abstract: An electronic device including electronics arranged in an electronics compartment and having electronic and/or electromechanical components. The device automatically detects and/or monitors wear of its electronic and/or electromechanical components and includes an apparatus for detecting and/or monitoring wear of the electronic and/or electromechanical components. Included is at least one element arranged in the electronics compartment. This element is independent of the electronics and has at least one physical property, which changes irreversibly as a function of wear of the element. The apparatus further includes a circuit for measuring the physical property, and an evaluating unit, which, based on the measured physical property, detects and/or monitors wear of the element and makes available a wear-dependent output signal.

Abstract: A pressure transducer comprising a resistive pressure sensor element with a measurement membrane which has at least four resistor elements. The resistor elements are arranged in a full-bridge circuit, having a longitudinal direction in which the full bridge circuit is to be supplied with a constant current. When being supplied with the constant current, a longitudinal voltage has a first pressure dependency and a first temperature dependency, and a diagonal voltage has a second pressure dependency and a second temperature dependency, the second pressure dependency being greater than the first pressure dependency at a given temperature. The pressure transducer has a processing circuit which is designed to determine a measured pressure value at least using the diagonal voltage and optionally the longitudinal voltage.

Abstract: A measuring device of process automation technology for measuring at least one process variable of a medium. A control unit is provided, which measures the process variable at least with a predeterminable clock rate and provides the result of such measurement as a measured value. Associated with the clock rate is an energy requirement of the measuring device, wherein a display/service unit is provided, which shows the measured value and/or enables servicing of, respectively parameter input to, the measuring device.

Abstract: Method for soldering a connection element to a connection point on an electrically conductive coating that is suitable for soft-soldering on an insulating surface of a base body using a soft-soldering method; as well as sensors manufactured using this method for which a spatial limitation of the wetting of the coating with soft-solder material, during the process of soft-soldering, is effected by providing a groove in the base body which at least partly surrounds the connection point on the outside. At least a part of the area of the external insulating surface of the base body including the connection point is coated with the coating, and soft-solder material is locally applied to the connection point and the connection element is soldered onto the connection point using the applied soft-solder material in a soft-soldering process.

Abstract: A method for manufacture of at least one component of a field device for determining or monitoring a process variable, wherein the field device is applied in automation technology and is manufactured from at least one material.

Abstract: A method for optimizing impedance of a connecting element between a first component and a second component of a high-frequency apparatus. The first component and the second component have at least two level states, wherein the connecting element has an input impedance and an output impedance. The first component has respective impedances in each of the at least two level states, wherein the second component has respective impedances in each of the at least two level states.

Abstract: A sintered body comprises a first region which comprises a first material having a first effective coefficient of thermal expansion ?1, a second region which comprises a second material having a second effective coefficient of thermal expansion ?2, a transition region between the first region and the second region in which the effective coefficient of thermal expansion changes from the first effective coefficient of thermal expansion to the second effective coefficient of thermal expansion. The transition region has a sequence of layers with a mixture of at least the first material and the second material, with the mixing ratio of the layers varying in order to achieve a stepwise, in particular monotonic, change in the coefficient of thermal expansion.

Abstract: A pressure sensor, including a platform of ceramic, a measuring membrane arranged on the platform, a pressure measuring chamber enclosed in the platform under the measuring membrane, and at least one metal body connected with the platform via a pressure-tight, preferably elastomer free, mechanical connection. Thermomechanical stresses arising from the connection are reduced by features including that the pressure-tight, mechanical connection occurs via an adapting body arranged between the platform and the metal body. The adapting body has a thermal expansion coefficient, which rises in direction (z) extending from the platform to the metal body from a coefficient of expansion corresponding to a thermal coefficient of expansion of the ceramic of the platform to a coefficient of expansion corresponding to the thermal coefficient of expansion of the metal body, and the adapting body is connected by a first joint with the platform and by a second joint with the metal body.

Abstract: An apparatus for determining and/or monitoring at least one process variable of a medium in a container or pipeline, including a resonator, which is in contact with an interior of the container or the pipeline, an active element for producing a high-frequency signal in the resonator and an electronics unit, which is embodied to receive from a unit formed of the resonator and the active element an electrical output signal. The electrical output signal is evaluated with reference to frequency.

Abstract: A ceramic pressure sensor is described which is produced using an alternative production method and has a ceramic base body, a ceramic measuring membrane which is disposed on the base body and is to be charged with a pressure to be measured, and a pressure measuring chamber enclosed in the base body below the measuring membrane. A method to produce the pressure sensor by means of which, in particular, more complex shapes of the measuring membrane and/or the base body are producible with minimal pores wherein the base body and/or the measuring membrane have layers applied on each other in a 3-D printing method and produced by the selective laser melting of nanopowder layers.

Abstract: A system for use in automation technology comprising: an Ethernet-enabled field device configured to measure a physical variable, and to generate data representative of the measured physical variable; an Ethernet cable connectable/connected to said field device, wherein said Ethernet cable having PoE (Power over Ethernet) capability so as to both transmit the data from the field device as well as supply power to the field device over the Ethernet cable; and a power sourcing equipment with at least a first output port to which the Ethernet cable is connectable/connected, wherein the power sourcing equipment is arranged so that an input alternating voltage is transformed to a first alternating output voltage, which is provided at the first output port to supply power to the field device over the Ethernet cable.

Abstract: A probe unit having a coaxial structure and including a probe electrode, a guard electrode and a contacting module arranged on a section of the probe electrode, which contacting module including an insulating sleeve, a flexible circuit board with a first conduction path for the electrical contacting of the probe electrode and a second conduction path for the electrical contacting of the guard electrode, and a module housing, wherein a first contact plate is provided that electrically contacts the first conduction path, the module housing including a second contact plate that electrically contacts the second conduction path, wherein the module housing has a pot-shaped geometry with a cylindrical wall, which wall substantially surrounds, protects and/or electromagnetically shields at least the probe electrode in the region in which the contacting module is arranged, at least a part of the insulating sleeve, and at least sections of the circuit board.

Abstract: A vibronic sensor for determining and/or monitoring at least one process variable of a medium in a container. The sensor at least comprising: a unit which can oscillate mechanically; a driving/receiving unit; and an electronic unit. The driving/receiving unit is designed to excite, by means of an electrical excitation signal, mechanical oscillations in the unit which can oscillate mechanically and is designed to receive the mechanical oscillations of the unit which can oscillate mechanically, and to convert them into an electrical receiving signal. The electronic unit is designed to generate the excitation signal on the basis of the receiving signal and to determine the at least one process variable from the receiving signal; The electronic unit comprises at least one adaptive filter; and the electronic unit is designed to set the filter characteristic of the adaptive filter in such a way that there is a target phase shift between the excitation signal and the receiving signal.