Abstract: A device comprising at least two controllable reactance elements (1) arranged to compensate a single phase-to-earth fault current in a power network with a power transformer (3). The at least two controllable reactance elements (1) are each connected with one side to two different voltages of a three phase voltage source which is synchronous with the power network, and that the reactance elements with their other side are jointly connected to the neutral (N) of the power network or its equivalent. The reactance elements are individually controllable by a control unit (2) designed to control the neutral voltage of the power transformer (3) or its equivalent with respect to amplitude and phase in relation to the power transformer's own voltage system. A method in relation to the device is also disclosed.

Abstract: In a multi-phase power grid fed by a power source, earth fault (460) is located by means of a power supply source synchronized with the power grid, which is connected between a zero point of the grid and earth. In a fault current compensation mode (420), a control unit controls the alternating voltage source to compensate for any ground fault current in the power grid to a value below a threshold level. In a fault detecting mode (430), the control unit gradually adjusts the output voltage of the alternating voltage source with respect to amplitude and/or phase angle (440). A change of zero-sequence current and zero-sequence admittance between the alternating voltage source and a fault location is measured (450) by means of at least one detector. The at least one detector is communicatively connected to the control unit and reports recorded measured values representing zero-sequence current and/or zero-sequence admittance to the control unit.

Abstract: A device comprising at least two controllable reactance elements (1) arranged to compensate a single phase-to-earth fault current in a power network with a power transformer (3). The at least two controllable reactance elements (1) are each connected with one side to two different voltages of a three phase voltage source which is synchronous with the power network, and that the reactance elements with their other side are jointly connected to the neutral (N) of the power network or its equivalent. The reactance elements are individually controllable by a control unit (2) designed to control the neutral voltage of the power transformer (3) or its equivalent with respect to amplitude and phase in relation to the power transformer's own voltage system. A method in relation to the device is also disclosed.

Abstract: In a multi-phase power grid fed by a power source, earth fault (460) is located by means of a power supply source synchronized with the power grid, which is connected between a zero point of the grid and earth. In a fault current compensation mode (420), a control unit controls the alternating voltage source to compensate for any ground fault current in the power grid to a value below a threshold level. In a fault detecting mode (430), the control unit gradually adjusts the output voltage of the alternating voltage source with respect to amplitude and/or phase angle (440). A change of zero-sequence current and zero-sequence admittance between the alternating voltage source and a fault location is measured (450) by means of at least one detector. The at least one detector is communicatively connected to the control unit and reports recorded measured values representing zero-sequence current and/or zero-sequence admittance to the control unit.

Abstract: An application-specific integrated circuit comprises: analog inputs having analog-digital converters; at least one digital signal processor, which has input registers and output registers. The analog-digital converters sample and digitize input signals Si with sampling frequencies fSi and forward the digitized signals SDi with output frequencies fSD-out-i to the input registers of the digital signal processor. The digital signal processor processes the digitized signals SDi to m processed signals SPj and forwards such to the output registers of the digital signal processor. The digital signal processor has a clock frequency, wherein, furthermore, the signals of the output registers can be output, respectively read-out, with an output frequency. One or more of the frequencies is, respectively, variable, wherein especially one or more of the frequencies, respectively, variable independently of the others of the frequencies.

Abstract: An application-specific integrated circuit comprises: analog inputs having analog-digital converters; at least one digital signal processor, which has input registers and output registers. The analog-digital converters sample and digitize input signals Si with sampling frequencies fSi and forward the digitized signals SDi with output frequencies fSD-out-i to the input registers of the digital signal processor. The digital signal processor processes the digitized signals SDi to m processed signals SPj and forwards such to the output registers of the digital signal processor. The digital signal processor has a clock frequency, wherein, furthermore, the signals of the output registers can be output, respectively read-out, with an output frequency. One or more of the frequencies is, respectively, variable, wherein especially one or more of the frequencies respectively, variable independently of the others of the frequencies.

Abstract: A method as well as a device for the lane allocation of consecutive vehicles, the lane allocation being carried out in a model-based manner via a frequency distribution of the lateral displacements of detected radar objects. The method is additionally used for detecting the misalignment of the sensor.

Abstract: Distance and velocity measuring at a plurality of objects using FMCW radar includes repeating measurements using different frequency ramps and including mixing transmitted and received signals, and recording the mixed signal's spectrum. A matching includes recording spectra peaks for ramps, if belonging to the same object, allocating them to each other, and calculating distances and velocities from peak frequencies. A tracking includes identifying with one another objects measured at various times based on distance and velocity consistency. Each measuring cycle includes less than four measurements with different frequency ramps. For each plausible two peak combination recorded, respectively, during first and second measurements of a cycle, distance and velocity of one possible object represented by these peaks are calculated. A measurement's anticipated result, is calculated from distance and velocity of the possible object, discarded if an anticipated result does not agree with the measured result.

Abstract: A device for a front-end component part of a motor vehicle, behind which a radar transmitter/receiver is fastened in such a way that the latter is not visible from in front. In winterish surroundings, ice and snow deposits may occur on the front component part, whereby the functionability of the radar sensor may be impaired. It is possible to remove and/or prevent these precipitation deposits on the front component part.

Abstract: A method for measuring distance and velocity at a plurality of objects using FMCW radar, in which measurements are repeated cyclically using at least two different frequency ramps, in each measurement, the transmitted signal is mixed with the received signal, and the spectrum of the mixed signal is recorded, in a matching procedure, the peaks that are in the spectra recorded for various ramps and that belong to the same object are allocated to each other, and the distances and velocities of the objects are calculated from the frequencies of the peaks, and in a tracking procedure, the objects measured at various times are identified with one another on the basis of the consistency of their distance and velocity data, wherein each measuring cycle includes not more than three measurements with different frequency ramps, for each plausible combination of two peaks, of which one was recorded during a first measurement and the other was recorded during a second measurement of the same cycle, the distance and the ve

Abstract: A device for a front-end component part of a motor vehicle, behind which a radar transmitter/receiver is fastened in such a way that the latter is not visible from in front. In winterish surroundings, ice and snow deposits may occur on the front component part, whereby the functionability of the radar sensor may be impaired. It is possible to remove and/or prevent these precipitation deposits on the front component part.

Abstract: A device for a radar system, the device being supplied with the received signals of at least two receiving antennas as input signals, and in which the output signals of this device are supplied to at least one unit for evaluating the received signals which includes at least two evaluation channels. Different input channels are allocated to the at least two evaluation channels as a function of supplied control signals.

Abstract: A support for an adjustable sensor housing, in particular for a radar sensor, in which the position of the sensor housing on the support is changeable using at least one adjusting screw. The at least one adjusting screw is able to be rotated using a regulatable adjusting drive, and for adjustment of the sensor housing there is an electronic control system present which conveys adjustment signals to the particular adjusting drive. A plug-in connection for a bus connection of the control unit electronics for communication with a higher-level bus system is present, and a compact support housing is constructed in which the electronic control system, the at least one adjusting drive and the plug-in connection are accommodated, and from which attachment points of the adjusting screws for the adjustable sensor housing protrude.

Abstract: A distance sensor having a sensor for a motor vehicle in which an arrangement is provided by which gnment angles and trajectory curvatures can be compensated for during travel not only on a straight road but also along curves. In a sensor mounted displaced from the center line of the vehicle, an angle (alpha_sensor) is measured which cuts the projected center line of the motor vehicle at the target object, a vehicle driving ahead. By the additional use of a yaw rate sensor, curve curvatures of the road are also compensated for, so that angle and distance measurement can also be made along curves.

Abstract: A method for correction of the detection range of a distance sensor, which is installed with an eccentricity laterally offset with respect to the central axis of a motor vehicle. In order to correct the detection range, a correction angle is used, with which the eccentricity of the distance sensor is corrected at the time of its installation. Thus the distance sensor is not aligned parallel to the longitudinal axis of the vehicle, but to its central axis. Thus, the detection range is advantageously covered approximately symmetrically to the longitudinal axis of the vehicle. The correction angle is determined either empirically, via appropriate test measurements, or mathematically.

Abstract: A device for a radar system, the device being supplied with the received signals of at least two receiving antennas as input signals, and in which the output signals of this device are supplied to at least one unit for evaluating the received signals which includes at least two evaluation channels. Different input channels are allocated to the at least two evaluation channels as a function of supplied control signals.

Abstract: A method for detecting and compensating for nonlinearities in a microwave radar system, in which a transmitted signal frequency-modulated according to a defined function is generated with a transmitting oscillator, and from the mixing of the transmitted signal with a received signal reflected from an object, a distance of the microwave radar system from the object is ascertained. In defined time windows, instead of a trigger voltage effecting frequency modulation, a defined constant test trigger voltage is switched to the transmitting oscillator; a reference signal ascertained in the context of the respective constant test trigger voltage, which signal corresponds to a frequency value of the transmitting oscillator, is employed to correct the characteristic for the frequency modulation and thus to compensate for nonlinearities.

Abstract: Method and device for state estimation in a system for automatic longitudinal and/or transverse regulation in a motor vehicle, operating according to the radar principle and/or the lidar principle, in particular for detecting soiling and/or blindness of a sensor is disclosed. The state estimation is dependent upon at least two indicators, which are formed from the signals received and/or transmitted by the sensor.

Abstract: A method is for operating a cruise control and/or adaptive cruise control system for a motor vehicle, and a cruise control and/or adaptive cruise control system includes a sensor unit alignable in relation to a radiation characteristic and includes a control unit. Furthermore, information, which prevents operation of the sensor unit as long for as the sensor unit is not aligned, is introduced into the control unit before a first startup of the system.

Abstract: A method for measuring the distance and speed of objects using electromagnetic waves with a motor vehicle radar system is described, electromagnetic waves being transmitted and simultaneously received, the transmitted electromagnetic waves being modulated in the shape of a ramp, at least the signals received during one rise and one drop of the frequency of the transmitted signal being mixed in each case with the transmitted signal, a number of intermediate frequency signals being formed, and the distance and speed of the object being calculated using the intermediate frequency, a weather condition in the vicinity of the motor vehicle and/or a disturbance in the motor vehicle radar system being identified on the basis of characteristic intermediate frequency signals.