Abstract: In accordance with an embodiment, A micro electro mechanical system (MEMS) device includes a cavity configured to contain a fluid; a pump configured to generate a pressure to the fluid in the cavity, wherein the pressure is configured to cause the fluid to be emitted from the cavity; a sensor configured to sense an electrical parameter based on an electrical impedance of the pump, and configured to provide a sensor signal based on the electrical parameter; and a controller configured to control an operation of the pump; wherein the controller is configured to process the sensor signal to adapt an operation of the MEMS device or for failure detection.

Abstract: The invention relates to a burner with a refractory burner body 1, 2, 3 for burning liquid or aerosol fuels, in particular, gaseous fuels. With the aim of reducing NOx emissions, the burner body comprises a gas nozzle 7, 9, 10, 11 and a plurality of air nozzles 4, 6, which are at least partially formed as integral mouldings in the burner body and flow out on a front side 16 of the burner body. Here, the air nozzles are symmetrically arranged around the gas nozzle and diverge at an angle ? to the gas nozzle. Likewise, the invention relates to a method for burning liquid or aerosol fuels, in particular, gaseous fuels with reduced NOx emissions.

Abstract: A strand-guiding section arranged downstream of a continuous casting mould of a continuous casting line. The strand-guiding section has at least one strand-guiding roller supporting a metal strand cast with the continuous casting mould, is mounted in roller bearings in the strand-guiding section, and has at least one sensor device, which has at least one vibration sensor acoustically coupled to the strand-guiding roller or its roller bearings to detect the vibrations occurring with the rotation of the strand-guiding roller in the roller bearings. The strand-guiding roller is cooled internally by a cooling water. The vibration sensor is acoustically coupled to the strand-guiding roller and/or to the roller bearings via the cooling water. The evaluation device determines the status of the at least one roller bearing by evaluating the vibration data.

Abstract: In order to implement a secure monitoring function for a long-stator linear motor or planar motor, the invention proposes that at least one first measurement value of a first sensor is compared to a predefined plausibility threshold value, and in the event of said plausibility threshold value being exceeded by the first measurement value, an error is identified and an action is triggered.

Abstract: In order to ensure safe operation of a multi-phase system, even a system including a plurality of phases, a number of phase groups is provided, which comprises some of the phases, wherein phase currents of the number of phase groups are merged in a group node to form a group sum current and a group sum current measurement value of the group sum current is captured. The current measurement values belonging to the number of phase groups are summed up to form a group sum and the group sum is compared with the group sum current measurement value to validate the phase currents of the phases in order to ensure safe operation.

Abstract: In order to implement a secure monitoring function for a long-stator linear motor or planar motor, the invention proposes that at least one first measurement value of a first sensor is compared to a predefined plausibility threshold value, and in the event of said plausibility threshold value being exceeded by the first measurement value, an error is identified and an action is triggered.

Abstract: In order to ensure safe operation of a multi-phase system, even a system including a plurality of phases, a number of phase groups is provided, which comprises some of the phases, wherein phase currents of the number of phase groups are merged in a group node to form a group sum current and a group sum current measurement value of the group sum current is captured. The current measurement values belonging to the number of phase groups are summed up to form a group sum and the group sum is compared with the group sum current measurement value to validate the phase currents of the phases in order to ensure safe operation.

Abstract: To reliably determine a state variable (G) of a polyphase synchronous machine (1) that is supplied with electric current by a polyphase power network (2) with n phases (U, . . . , N), where n?3, the current values of at least n?1 phase currents (Iu, . . . , In-1) from at least n?1 phases (U, . . . , N-1) of the polyphase power network (2) are detected. The state variable (G) is determined by means of the at least n?1 instantaneous current values (Iu, . . . , In-1), the current values of all n phase currents (Iu, . . . , In) from the n-phase polyphase power network (2) being detected and the n phase currents (Iu, . . . , In) being correlated with one another. The result of the correlation of all n phase currents (Iu, . . . , In) is used for a plausibility check of the n?1 phase currents (Iu, . . . , In-1) used to determine the state variable (G).

Abstract: To reliably determine a state variable (G) of a polyphase synchronous machine (1) that is supplied with electric current by a polyphase power network (2) with n phases (U, . . . , N), where n?3, the current values of at least n?1 phase currents (Iu, . . . , In-1) from at least n?1 phases (U, . . . , N?1) of the polyphase power network (2) are detected. The state variable (G) is determined by means of the at least n?1 instantaneous current values (Iu, . . . , In-1), the current values of all n phase currents (Iu, . . . , In) from the n-phase polyphase power network (2) being detected and the n phase currents (Iu, . . . , In) being correlated with one another. The result of the correlation of all n phase currents (Iu, . . . , In) is used for a plausibility check of the n?1 phase currents (Iu, . . . , In-1) used to determine the state variable (G).

Abstract: A rolling stand for producing rolled strip, includes rolls which are axially displaceable with respect to one another, and have a curved contour running over the entire effective barrel length and complement one another exclusively in a specific relative axial position of the rolls in the unloaded state. To vary the thickness profile of the roll gap over the active roll barrel length there is axial displacement of the rolls which are provided with a roll barrel contour in relation to one another in such a way that a rolled strip that is planar and free from undulations. The profile of the barrel contour of the rolls of a pair of rolls is formed by a trigonometric function and the roll gap contour is also formed by a trigonometric function in dependence on the profile of the barrel contour and the position of the rolls within the axial displacement region.