Abstract: A method for operating a radar apparatus having transmitting antennas and at least one receiving antenna, including: generating transmission spectra by complex modulation of mutually equidistant orthogonal OFDM subcarriers; transforming the transmitted spectra into the time domain; digital/analog conversion, high-frequency modulation of the transmitted spectra, and simultaneous emission of the modulated transmitted spectra via the transmitting antennas; demodulating and digitizing a received signal; generating one received spectrum per transmitted spectrum, a division of the OFDM subcarriers corresponding to their division in the transmitted spectra being carried out; eliminating the transmitted signal forms of the transmitted spectra from the received spectra; generating one radar image per received spectrum; evaluating the radar images in a distance dimension and in a speed dimension; and carrying out a signal evaluation for the received signal.

Abstract: A sensor system for furnishing a D-dimensional measured signal encompasses at least N sensors (where D<N) sensors that have measurement directions linearly independent of one another; a stimulus source for furnishing a periodic stimulus signal for each of the sensors, the stimulus signals having mutually orthogonal frequencies; and a processing device for removing the stimulus signals from the sensor signals and for furnishing the D-dimensional measured signal.

Abstract: A method is described for monitoring a battery, and a battery and a system for carrying out the method in connection with such a battery. A number of sensors are assigned to the battery, the sensors being connected serially to one another and to a control unit via a data line; at least one of the sensors putting in each case at least one data word on the data line.

Abstract: The disclosure relates to a sensor arrangement for a vehicle having at least one rotation-speed detection apparatus, which continuously detects a state variable and outputs said state variable to an evaluation and control unit which receives and evaluates signals which are output by a rotation-speed detection apparatus, wherein the evaluation and control unit carries out a first evaluation process with the detected state variable and ascertains a rotation speed of at least one vehicle wheel, the rim of said vehicle wheel being fastened to a corresponding wheel hub by means of wheel fastening means. According to the disclosure, the evaluation and control unit carries out a second evaluation process and identifies and monitors, on the basis of the continuously detected state variable, mechanical play between the vehicle wheel and the corresponding wheel hub in order to detect detached wheel fastening means.

Abstract: A method for operating a radar apparatus having transmitting antennas and at least one receiving antenna, including: generating transmission spectra by complex modulation of mutually equidistant orthogonal OFDM subcarriers; transforming the transmitted spectra into the time domain; digital/analog conversion, high-frequency modulation of the transmitted spectra, and simultaneous emission of the modulated transmitted spectra via the transmitting antennas; demodulating and digitizing a received signal; generating one received spectrum per transmitted spectrum, a division of the OFDM subcarriers corresponding to their division in the transmitted spectra being carried out; eliminating the transmitted signal forms of the transmitted spectra from the received spectra; generating one radar image per received spectrum; evaluating the radar images in a distance dimension and in a speed dimension; and carrying out a signal evaluation for the received signal.

Abstract: The disclosure relates to a sensor arrangement for a vehicle having at least one rotation-speed detection apparatus, which continuously detects a state variable and outputs said state variable to an evaluation and control unit which receives and evaluates signals which are output by a rotation-speed detection apparatus, wherein the evaluation and control unit carries out a first evaluation process with the detected state variable and ascertains a rotation speed of at least one vehicle wheel, the rim of said vehicle wheel being fastened to a corresponding wheel hub by means of wheel fastening means. According to the disclosure, the evaluation and control unit carries out a second evaluation process and identifies and monitors, on the basis of the continuously detected state variable, mechanical play between the vehicle wheel and the corresponding wheel hub in order to detect detached wheel fastening means.

Abstract: A method for ascertaining a misalignment of a radar sensor of a vehicle ascertains a misalignment angle of the misalignment using a weighted averaging of calculated differences between first and second angles of radar reflectors relative to various axes. Also described is a device for ascertaining this misalignment.

Abstract: A sensor system for furnishing an N-dimensional measured signal encompasses at least N+1 sensors that have measurement directions linearly independent of one another; a stimulus source for furnishing a periodic stimulus signal for each of the sensors, the stimulus signals having mutually orthogonal frequencies; and a processing device for removing the stimulus signals from the sensor signals and for furnishing the N-dimensional measured signal.

Abstract: An intrinsically safe digital circuit has at least two output signals and at least four input signals for detecting a potential error in the circuit and/or in one of its input signals, the at least four input signals forming two input signal pairs inverted in a double-track manner, and the at least two output signals forming an output signal pair inverted in a double-track manner. The output signal pair transmits a piece of information which is identical to the one of an input signal pair, when the error is not present.

Abstract: A method is described for monitoring a battery, and a battery and a system for carrying out the method in connection with such a battery. A number of sensors are assigned to the battery, the sensors being connected serially to one another and to a control unit via a data line; at least one of the sensors putting in each case at least one data word on the data line.

Abstract: A method for ascertaining a misalignment of a radar sensor of a vehicle ascertains a misalignment angle of the misalignment using a weighted averaging of calculated differences between first and second angles of radar reflectors relative to various axes. Also described is a device for ascertaining this misalignment.

Abstract: A method facilitates sensor image detection of a work line that is provided on a workpiece and is to be followed with a working tool of a working device that is equipped with an image detection apparatus. The method includes detecting an image section that is adjacent to the working tool as a halftone image in relation to the working tool applied to the workpiece in a region of the working line, aligning a position of the working device approximately to the working line, and evaluating the halftone image in terms of image pixels describing the working line and lying in contact with and/or overlapping the working line in order to detect the working line.

Abstract: An intrinsically safe digital circuit has at least two output signals and at least four input signals for detecting a potential error in the circuit and/or in one of its input signals, the at least four input signals forming two input signal pairs inverted in a double-track manner, and the at least two output signals forming an output signal pair inverted in a double-track manner. The output signal pair transmits a piece of information which is identical to the one of an input signal pair, when the error is not present.

Abstract: An electroactive polymer generator is configured to convert mechanical energy into electrical energy during expansion and compression of the polymer generator. The polymer generator comprises a device for detecting expansion and compression states. The device comprises at least one acceleration sensor.

Abstract: The invention relates to an electronically commutated electric motor comprising a stator and an especially permanent-magnetic rotor. The electric motor also comprises a control unit which is effectively connected to the stator and is designed to generate control signals for commutating the stator in such a way that the stator can generate a rotating magnetic field in order to rotate the rotor. The electric motor further comprises at least one rotor position sensor which is designed to detect a position, especially an angular position, of the rotor and generate a rotor position signal representing the position of the rotor. The control unit is designed to generate the control signals in accordance with the rotor position signal. According to the invention, the control unit is designed to sample and quantize the rotor position signal and generate a digital rotor position signal.

Abstract: The invention relates to a method for unambiguously determining a physical parameter ? using m phase-measured values ?i with 1?i?m, whereby the phase-measured values ?i have different, integer periodicity values ni and an integer periodicity difference (a) with ?n>1 within an unambiguous range E of the physical parameter ?. A value T with (b) and (c) is calculated based on the phase-measured values ?i and the periodicity values ni thereof, and, within a reduced unambiguous range Ered with (d), a value V is allocated to the value T by allocation according to (e), wherein TUk stands for a respective lower limit and TOk for a respective upper limit of T. The allocation intervals between the upper (TOk) and the lower limits (TUk) for T, as wells as the distances (f) correspond at least to the periodicity difference ?n. In order to determine the physical parameter ?, value V is added up with the phase-measured values ?i in a weighted manner.

Abstract: For operational control of a start-up of a rate-of-turn sensor including at least one oscillator element that is excitable to perform a mechanical oscillating motion, a signal proportional to the instantaneous speed or deflection of the oscillator element is amplified and used as the operating signal to operate the oscillator element, during the start-up process for the rate-of-turn sensor, the amplitude of the operating signal is set to a constant specifiable value, the stimulation frequency of the operating signal is increased essentially continuously from a starting value below the main driving frequency of the oscillating motion to a final value above the main driving frequency and below a spurious driving frequency while, simultaneously, the deflection and/or the speed of the oscillator element are monitored in order to determine the main driving frequency of the oscillating motion, once the final value is reached and the main driving frequency is determined, the stimulation frequency of the operating si

Abstract: A method for operation of and simultaneous analysis of a rate-of-turn sensor, comprising an oscillator element and a Coriolis element arranged on the oscillation element is disclosed, comprising the following method steps: generation of a digital operating signal with an excitation frequency corresponding to the resonant frequency of the oscillator element, digital to analogue conversion of the digital operating signal and operation of the oscillator element with the analogue operating signal, recording a Coriolis speed of the Coriolis element occurring about a normal to both oscillation axes due to the rotation of the rate-of-turn sensor with generation of an analogue Coriolis' signal proportional to the Coriolis speed, analogue-to-digital conversion of the analogue Coriolis signal, phase-sensitive multiplication of the digital Coriolis signal with the digital operating signal to form an intermediate signal, generation of a control signal proportional to the rate of turn of the rate-of-turn sensor from the i

Abstract: For driving and simultaneously evaluating a deflection and/or a rate of motion of an electrostatically excited oscillator element, excitation currents flowing during electrostatic excitation are determined, and deflection and/or the rate of motion of the oscillator element are determined based on the determined excitation currents.

Abstract: The invention relates to a circuit assembly for operating a sensor array, in particular, a gas sensor array for detecting gases, which comprises at least one signal line. According to said invention, a signal line is divided into two parallel line branches with a sensor and a diode, preferably a Schottky diode, arranged in each of said two parallel line branches, whereby the two diodes have opposite electrical polarity. The use of different polarity diodes permits actuation of both sensors through only one signal line. It can be determined if the current flows through one or the other of both sensors by merely polarizing the electrical potential applied to the signal line appropriately.