摘要:
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.
摘要:
The invention is related to capacitive sensing and detection systems and methods. In one embodiment, a capacitive sensor system comprises a first electrode and a second electrode forming a first capacitive sensor mounted to a vehicle and configured to create a first electric field directed outward from the vehicle, and a control unit coupled to the first and second electrodes and configured to measure a change in the first electric field. In another embodiment, a method comprises capacitively sensing an object relative to a vehicle and communicating information related to the object. In yet another embodiment, a method comprises configuring a capacitive sensor to sense an object relative to a vehicle, and providing a path to communicate information from the capacitive sensor.
摘要:
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.
摘要:
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.
摘要:
In an embodiment, a method for sensing a body includes measuring an impedance of a body occupying a seat over a plurality of frequencies and comparing the measured impedance of the body with a predefined body model. The method also includes determining whether the predefined body model corresponds to the measured impedance of the body.
摘要:
In an embodiment of the present invention, a method for sensing a body is disclosed. The method includes measuring an impedance of a body occupying a seat over a plurality of frequencies and comparing the measured impedance of the body with a predefined body model. The method also includes determining whether the predefined body model corresponds to the measured impedance of the body.
摘要:
A phase locked loop (PLL) circuit includes a first signal detector having a first input terminal configured to receive a varying first input signal, a second input terminal configured to receive a feedback signal that corresponds to the center of the input frequency, and an output terminal configured to provide an output signal corresponding to a phase difference between the first input and feedback signals. A delay estimator has an input terminal configured to receive the output signal from the first phase detector and in response thereto, output a phase difference estimation signal. A variable delay circuit has an input terminal configured to receive the phase difference estimation signal and in response thereto, phase shift the second input signal.
摘要:
A system includes a first circuit configured to convert a first analog signal to a first digital signal. The system includes a second circuit configured to determine an area of the first digital signal above a set value and an area of the first digital signal below the set value to provide a second digital signal indicating an offset of the first analog signal.
摘要:
A method for evaluating a sensor signal provided by a magnetic field sensor which is arranged at a distance from an object which is rotatable about an axis of rotation is disclosed. The method includes defining an encoding pattern with a sequence of symbols, the sensor signal being dependent on the encoding pattern and at least one transmission parameter; regenerating the symbols of the encoding pattern from a corrected sensor signal using a threshold value detector to obtain an output signal; generating a filtered signal from the output signal using a filter having a plurality of filter coefficients; superposing the sensor signal and the filtered signal to obtain the corrected sensor signal; and wherein the corrected sensor signal and the output signal are used to estimate the at least one transmission parameter, and the filter coefficients are derived from the estimated transmission parameter.
摘要:
A system includes a capacitive sensor including a first electrode and a second electrode. The system includes a measurement system configured to sense a capacitance between the first electrode and the second electrode and apply a first offset to the sensed capacitance to provide an offset compensated capacitance.