Abstract: A method for operating a measuring system includes: carrying out impedance measurements with at least three property measurement electrodes on a medium in a first region of a measuring tube interior over an impedance measurement period and, at the same time, signaling the impedance measurement period by a measuring signal to a flow measurement controller; determining a property of the medium from the impedance measurements using impedance tomography; generating a magnetic field in the medium in a second region of the measuring tube interior by the flow measurement controller using a magnetic field generator; carrying out voltage measurements at a sampling rate using at least two flow measurement electrodes on the medium in the second region; taking an impedance measurement duration from the measuring signal; and discarding the voltage measurements carried out during the impedance measurements; and determining a flow rate of the medium from the remaining voltage measurements.

Abstract: A method for operating a magnetic-inductive flowmeter includes: detecting the noisy raw measurement signal having a first signal path by a signal sensor with high impedance by the pair of electrodes; passing the detected, noisy raw measurement signal on to a first signal processing device; processing the detected, noisy raw measurement signal by the signal processing device at least into a noise-removed flow measurement signal; outputting the noise-removed flow measurement signal via a working signal interface; detecting the detected, noisy raw measurement signal of the first signal path with a second signal path; and transmitting the detected, noisy raw measurement signal at least indirectly to the first signal processing device and/or a second signal processing device. The first signal processing device and/or the second signal processing device also carry out a frequency analysis of the detected, noisy raw measurement signal. A corresponding magnetic-inductive flowmeter is also disclosed.

Abstract: A method for operating a magnetic-inductive flowmeter includes: recording an electrode signal of an electrode voltage during a magnetic field alignment as measurement data; low-pass filtering the measurement data so that a first low-pass filtered evaluation signal is present; determining a first flow parameter from the low-pass filtered evaluation signal, which is compared with a first limit value; high-pass filtering the measurement data so that a high-pass filtered evaluation signal is present; determining a second flow parameter from the high-pass filtered evaluation signal, which is compared with a second limit value; separately subjecting the low-pass-filtered evaluation signal and the high-pass-filtered evaluation signal to a same evaluation; and assigning a two-phase flow to the flowing medium if at least one of: (i) the first flow parameter exceeds the first limit value; and (ii) the second flow parameter exceeds the second limit value. A related flowmeter is also disclosed.

Abstract: A method for operating a magnetic-inductive flowmeter includes: generating polarized measurement data dependent on a polarity of a magnetic field passing through a measuring tube; obtaining a frequency spectrum independent of the magnetic field by a discrete frequency analysis of the polarized measurement data; obtaining a magnetic field-dependent frequency spectrum by a discrete frequency analysis of depolarized measurement data derived from the polarized measurement data; examining amplitude values of the magnetic field-independent frequency spectrum for a magnetic field-independent event, and/or examining amplitude values of the magnetic field-dependent frequency spectrum for a magnetic field-dependent event; and identifying and signaling the presence of a magnetic field-independent event and/or a magnetic field-dependent event. A related magnetic-inductive flowmeter is also disclosed.

Abstract: A method for operating a magnetic-inductive flowmeter includes: passing a magnetic field through a measuring tube having a medium flowing therethrough; tapping a voltage induced in the medium as a measuring signal; determining a flow measurement value from the measuring signal; generating measuring signal samples in respective measuring windows that periodically repeat at a measuring window frequency; determining an averaged flow measurement value from the measuring signal samples; obtaining an amplitude spectrum of the measuring signal samples by a frequency analysis thereof; determining an interference peak in the amplitude spectrum and an associated interference peak frequency that is not a multiple of the measuring window frequency; identifying a critical measurement situation by checking whether the interference peak frequency falls below a critical frequency distance to a multiple of the measuring window frequency; and in the presence of a critical measurement situation, determining and setting a new me

Abstract: A method for manufacturing a leaf spring device (1) made from a fiber composite plastic, comprising the following steps: a) providing (S1) a construction kit (11) comprising a leaf spring unit (2) made from the fiber composite plastic and a plurality of stiffening elements (8, 8A, 8A?, 8A?, 8B, 8B?, 8B?, 8C, 8C?) for locally stiffening the leaf spring unit (2), b) designing (S2) the leaf spring device (1) according to a desired application, c) selecting (S3) stiffening elements (8, 8A, 8A?, 8A?, 8B, 8B?, 8B?, 8C, 8C?) from the construction kit (11) according to the design of the leaf spring device (1), and d) combining (S4) the selected stiffening elements (8, 8A, 8A?, 8A?, 8B, 8B?, 8B?, 8C, 8C?) and the leaf spring unit (2) to form the leaf spring device (1).

Abstract: A spring device (1A, 1B) for a motor vehicle (2), comprising a spring unit (3) and a stiffness adjusting unit (15) configured to stiffen the spring unit (3) so as to dynamically vary the spring constant (k, k?) of the spring device (1A, 1B).

Abstract: A method for operating a magnetic-inductive flowmeter includes several steps. In a calibration step, a plurality of noise-removed comparison flow measurement values are determined. A comparison frequency spectrum is determined from at least a part of a plurality of detected, noisy raw measurement signals, on which the calculation of the noise-removed comparison flow measurement values is based. In a measurement operation step, a current noise-removed flow measurement value is calculated from a plurality of detected, noisy raw measurement signals. A current measurement frequency spectrum is determined from at least some of the plurality of detected, noisy raw measurement signals. In a comparison step, the current measurement frequency spectrum is compared with one of the comparison frequency spectra and a deviation value is determined. Depending on the deviation value, the current noise-removed flow measurement value is signaled as unreliable and/or as reliable.

Abstract: A method is disclosed for evaluating the installation position of a measuring device in a system using an augmented reality device, wherein the augmented reality device has at least one capturing unit for capturing the system, at least one computing unit and at least one display unit, the method comprising the following steps: at least partially capturing the system using the at least one capturing unit; visually representing the system on the display unit on the basis of the at least partial capturing of the system; assigning at least one measuring device installed in the system in an installation position and/or placing at least one virtual measuring device in an installation position in the visual representation of the system; evaluating the installation position of the at least one recognized and/or virtual measuring device using the computing unit; and representing the evaluation on the display unit.

Abstract: A method for operating a measuring system includes: carrying out impedance measurements with at least three property measurement electrodes on a medium in a first region of a measuring tube interior over an impedance measurement period and, at the same time, signaling the impedance measurement period by a measuring signal to a flow measurement controller; determining a property of the medium from the impedance measurements using impedance tomography; generating a magnetic field in the medium in a second region of the measuring tube interior by the flow measurement controller using a magnetic field generator; carrying out voltage measurements at a sampling rate using at least two flow measurement electrodes on the medium in the second region; taking an impedance measurement duration from the measuring signal; and discarding the voltage measurements carried out during the impedance measurements; and determining a flow rate of the medium from the remaining voltage measurements.

Abstract: A device for purifying a product by crystallization includes: a feed unit having a solution in which the total product concentration is substantially completely dissolved or a suspension with the total product concentration; a crystallization unit in which the product crystallizes and forms a solids content; a separation unit in which the crystallized product is separated from the solution or suspension; a temperature control unit for controlling temperature at least in the feed unit and/or the crystallization unit; and a control and evaluation unit that determines the total product concentration and/or the concentration of the solids content and/or the concentration of the dissolved product content and/or the concentration of an impurity content, taking into account the measured values of connected temperature sensors and of connected impedance sensors.

Abstract: A method for operating a magnetic-inductive flowmeter includes: detecting the noisy raw measurement signal having a first signal path by a signal sensor with high impedance by the pair of electrodes; passing the detected, noisy raw measurement signal on to a first signal processing device; processing the detected, noisy raw measurement signal by the signal processing device at least into a noise-removed flow measurement signal; outputting the noise-removed flow measurement signal via a working signal interface; detecting the detected, noisy raw measurement signal of the first signal path with a second signal path; and transmitting the detected, noisy raw measurement signal at least indirectly to the first signal processing device and/or a second signal processing device. The first signal processing device and/or the second signal processing device also carry out a frequency analysis of the detected, noisy raw measurement signal. A corresponding magnetic-inductive flowmeter is also disclosed.

Abstract: A method for operating a magnetic-inductive flowmeter includes several steps. In a calibration step, a plurality of noise-removed comparison flow measurement values are determined. A comparison frequency spectrum is determined from at least a part of a plurality of detected, noisy raw measurement signals, on which the calculation of the noise-removed comparison flow measurement values is based. In a measurement operation step, a current noise-removed flow measurement value is calculated from a plurality of detected, noisy raw measurement signals. A current measurement frequency spectrum is determined from at least some of the plurality of detected, noisy raw measurement signals. In a comparison step, the current measurement frequency spectrum is compared with one of the comparison frequency spectra and a deviation value is determined. Depending on the deviation value, the current noise-removed flow measurement value is signaled as unreliable and/or as reliable.

Abstract: A measuring device for time-resolved measurement of a measurement signal and for temporal separation of at least a first portion of the measurement signal, having a light source for emitting a pulsed excitation signal, at least one detector for receiving the measurement signal, the detector generating a detector signal from the measurement signal, at least one first forming unit for generating a first comparison signal, and at least one evaluation unit, the first comparison signal correlating with the excitation signal. At least one first logic function is provided which links at least the first comparison signal with a signal dependent on the detector signal so that the output of the logic function provides a measure of the intensity of the first portion of the measurement signal or of the detector signal. The output of the first logic function is connected to the at least one evaluation unit.

Abstract: A cable core for a cable, in particular, for an induction cable that includes multiple such cable cores which have a conductor that is interrupted in the longitudinal direction at specified longitudinal positions at multiple separation points, thereby forming two conductor ends. An insulating intermediate piece is provided for connecting the conductor ends, and the conductor ends are arranged on both sides of the intermediate piece. The conductor and the intermediate piece are surrounded together by a continuous insulating jacket in order to form the cable core. In a preferred concept, a respective intermediate piece is arranged between the two conductor ends by two adapter elements. In another preferred concept, a respective intermediate piece, in particular, a ceramic intermediate piece, is connected directly to two conductor ends. A cable is formed from a plurality of such cable cores.

Abstract: A method is disclosed for evaluating the installation position of a measuring device in a system using an augmented reality device, wherein the augmented reality device has at least one capturing unit for capturing the system, at least one computing unit and at least one display unit, the method comprising the following steps: at least partially capturing the system using the at least one capturing unit; visually representing the system on the display unit on the basis of the at least partial capturing of the system; assigning at least one measuring device installed in the system in an installation position and/or placing at least one virtual measuring device in an installation position in the visual representation of the system; evaluating the installation position of the at least one recognized and/or virtual measuring device using the computing unit; and representing the evaluation on the display unit.

Abstract: A cable, in particular an induction cable, extends in a longitudinal direction along a longitudinal axis and is provided for laying in a pipe. A laying aid is mounted on the cable. The laying aid is formed so that the cable can be rotated about the longitudinal axis during laying. The cable is laid by a method for laying the cable which extends in a longitudinal direction, in which the laying aid is provided and the cable is laid in the longitudinal direction. The cable is rotated about a longitudinal axis extending in the longitudinal direction during laying.

Abstract: An induction cable contains a plurality of cable conductors each having a conductor strand surrounded by insulation. The conductor strand contains a plurality of conductor sections which are spaced apart in the longitudinal cable direction at resonance dividing points by insulating intermediate pieces. The induction cable furthermore has a coupling device on which a plurality of the conductor strands are separated forming coupling ends at coupling positions. The coupling ends are connected to each other via the coupling device. A simple providing and installing of the induction cable and a simple replacement of damaged cable parts is thus enabled.

Abstract: A measuring device for time-resolved measurement of a measurement signal and for temporal separation of at least a first portion of the measurement signal, having a light source for emitting a pulsed excitation signal, at least one detector for receiving the measurement signal, the detector generating a detector signal from the measurement signal, at least one first forming unit for generating a first comparison signal, and at least one evaluation unit, the first comparison signal correlating with the excitation signal. At least one first logic function is provided which links at least the first comparison signal with a signal dependent on the detector signal so that the output of the logic function provides a measure of the intensity of the first portion of the measurement signal or of the detector signal. The output of the first logic function is connected to the at least one evaluation unit.

Abstract: A composite material selectively applied to at least surface areas of a piston of an internal combustion engine. The composite material contains at least high temperature polymers and/or liquid crystalline polymers (LCP).