Abstract:
A method for online testing of a signal path from a sensor cell to an evaluation point, including providing at least two mutually different test signals, changing the sensor cell output signal on the basis of the at least two mutually different test signals in accordance with a predetermined change specification to obtain the sensor signal, so that the sensor signal depends on the sensor cell output signal and the at least two test signals, outputting the sensor signal or a signal derived from the sensor signal onto the signal path, processing the sensor signal or the signal derived from the sensor signal while taking into account the predetermined change specification to obtain a processed signal, and examining the processed signal with regard to the presence of the at least two mutually different test signals to provide a signal path fault indication on the basis thereof.
Abstract:
A system for capacitive object recognition including a pair of electrodes, one of the electrodes having an adjustable parameter, and a controller modeling current pathways formed by interaction of an object with an electric field between the pair electrodes as a network of capacitors. The controller is configured to set the adjustable parameter to a first setting and to apply a set of alternating current voltages to the pair electrodes and measure a resulting first set of current values at each of the electrodes, configured to set the adjustable parameter to a second setting and apply the set of alternating current voltages to the pair of electrodes and measure a resulting second set of current values at each of the electrodes, and configured to determine values for up to all capacitors of the network of capacitors based on the first and second sets of current values.
Abstract:
The invention is related to capacitive sensing and detection systems and methods. In one embodiment, a capacitive sensor system comprises a first electrode arrangement having a first characteristic and related to a first capacitance, a second electrode arrangement having a second characteristic different from the first characteristic and related to a second capacitance, and a control unit coupled to the first and second electrode arrangements and configured to identify an object-dependent variable from at least one of the first and second characteristics and first and second capacitances.
Abstract:
A sensor has a suspended mechanical resonator being responsive to one of a linear acceleration and an angular velocity of the sensor such that a first area and a second area are subjected to opposite elongation movements and responsive to the other such that the first area and the second area are subjected to a common elongation movement, a first mechanical-electrical interface interacting with the first area, a second mechanical-electrical interface interacting with the second area, a common mode signal generator coupled to the mechanical-electrical interfaces with a common mode signal output, a differential mode signal generator coupled to the mechanical-electrical interfaces with a differential mode signal output, a first processing circuit coupled to the differential mode output, with an output for a first processed signal, and a second processing circuit coupled to the common mode output with an output for a second processed signal.
Abstract:
An ESD protective circuit having a contact terminal, a first supply voltage terminal for a first supply potential, a second supply voltage terminal for a second supply potential, a transistor chain having several transistors, wherein drain terminals of the transistors are connected to one of the supply voltage terminals, wherein the control terminal of a first transistor of the transistor chain is connected to the other supply voltage terminal, wherein the source terminal of the last transistor of the transistor chain is connected to the contact terminal, and a current source which is connected to a source terminal of at least one of the transistors of the transistor chain and is able to provide a current which compensates, up to a maximum tolerable voltage deviation from the first or second supply potential at the contact terminal, a current flowing into or from the source terminal.
Abstract:
A sensor device has a sensor assembly with at least one sensor element, an additional sensor assembly having at least one additional sensor element, and a switch-in element which couples the additional sensor assembly to the sensor assembly responsive to a switch-in signal to obtain an overall sensor assembly having a reduced power demand.
Abstract:
An apparatus for determining a state parameter of an object to be monitored comprises a means for providing a plurality of measurement values, wherein the measurement values comprise information relating to the state parameter of the object to be monitored, a comparison means for comparing the measurement value to a predeterminable comparison parameter, wherein the comparison means is formed to output a first comparison signal when a predeterminable number of measurement values falls below the comparison parameter within a measurement interval, or to output a second comparison signal when the predeterminable number of measurement values exceeds or reaches the comparison parameter, wherein the first comparison signal or the second comparison signal indicate the state parameter.
Abstract:
A power supply arrangement has a charge storage means, a charge means, a reference signal source and a processing means. The power supply arrangement is implemented to provide the output signal with the predetermined output signal level at the output terminal based on the supplementary supply signal or based on a combination of the supplementary supply signal and the input signal, if the actual input signal level is lower in amount to the set input signal level. The power supply arrangement can be used in a side airbag sensor system, wherein a power supply and communication protocol is used, which transmits an input signal in the form of a transmitted pulse to a sensor via the voltage supply, to store energy based on the transmitted pulse and to use the same to maintain an output level at the output of the voltage supply, when the input voltage falls below a critical threshold.
Abstract:
A method for determining the angular position of a rotating object and rotary encoder is disclosed. In one embodiment, the method includes a method for determining the angular position of an object rotating about a rotation axis in a rotation direction and having a coding pattern, using a sensor that senses the coding pattern, including ascertaining the coarse angular position of the rotating object with respect to the sensor whilst taking account of the coding pattern at a first instant. The exact angular position of the rotating object is ascertained with respect to the sensor whilst taking account of the coarsely ascertained angular position and also whilst taking account of at least one section of the coding pattern which extends counter to the rotation direction proceeding from that location of the coding pattern which is assigned to the coarse angular position. An output signal is provided containing items of information about the exact angular position of the rotating object with respect to the sensor.
Abstract:
In the system for monitoring tire pressure in a tire of a vehicle, temporally successive tire pressure measured values are sensed by a transmitting unit, and at least part of the tire pressure measured values is transmitted to a receiving unit with a variable frequency of occurrence, wherein the frequency of occurrence is derived from the sensed tire pressure measured values by means of a control unit.