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公开(公告)号：US20210262838A1
公开(公告)日：2021-08-26
申请号：US17057934
申请日：2019-05-23
Inventor： Baptiste ANTI , Heinrich GIERENS , Christian URIG , Christoph WENDT , Lukas HILLAY , Dirk Johannes THOMAS , Jan LIPTAK
Abstract: A method of operating a capacitive measurement system for compensation of temperature influence is described. The capacitive measurement system includes at least one capacitive sensor member in an installed state and a capacitive measurement circuit for determining a complex impedance of an unknown capacitance from a complex sense current through the at least one capacitive sensor member. In the method, a calibration measurement is carried out to obtain temperature characteristics of both the real part and the imaginary part of determined impedances. In following impedance measurements of the unknown capacitance at a current temperature, the real part and the imaginary part of the measured impedance is determined, and based on the real part determined at the current temperature and the determined temperature characteristics of both the real part and the imaginary part, the imaginary part of the impedance determined at the current temperature is corrected.
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公开(公告)号：US20170373686A1
公开(公告)日：2017-12-28
申请号：US15538114
申请日：2015-12-30
Inventor： Christoph WENDT , Laurent LAMESCH
IPC: H03K17/955 , H03K17/96 , G01R27/26 , H01H13/70
Abstract: A capacitive sensor that includes: a sensing electrode having a capacitance to be measured; an alternating voltage source, configured to apply an alternating voltage to the sensing electrode; a capacitive first transfer device; a measurement circuit configured to measure the capacitance of the sensing electrode; and a switching arrangement. The switching arrangement is configured to alternately, in a first switching state, connect the first transfer device to the sensing electrode to enable a charge transfer from the sensing electrode to the first transfer device and, in a second switching state, connect the first transfer device to the measurement circuit to enable a charge transfer from the first transfer device to the measurement circuit.
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3.发明公开
公开(公告)号：US20240003947A1
公开(公告)日：2024-01-04
申请号：US18037011
申请日：2021-11-15
Inventor： Laurent LAMESCH , Tobias JUSTINGER , Michael PÜTZ , Thomas FABER , Christoph WENDT , Johnny LORANG
IPC: G01R27/02 , B60N2/00 , H03K17/955
CPC classification number: G01R27/02 , B60N2/0021 , H03K17/955 , B60N2210/12 , H03K2217/960735
Abstract: An impedance measurement circuit for determining a complex impedance of a capacitive sensor having at least one sense electrode operable in loading mode and at least one guard electrode. The measurement circuit includes: a pulse generator unit for providing a periodic electric measurement signal and a periodic electric guard signal; a signal sensing circuit for sensing a sense current flowing through the at least one sense electrode or the sense electrodes in response to the pulse generator unit measurement signal; and a control and evaluation unit. The control and evaluation unit is configured for determining a complex impedance from the determined sense currents with reference to a complex reference potential.
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公开(公告)号：US20160278162A1
公开(公告)日：2016-09-22
申请号：US15031171
申请日：2014-10-20
Inventor： Andreas PETEREIT , Christoph WENDT
CPC classification number: H05B1/0236 , B60H1/00271 , B60H1/00642 , H05B1/0202 , H05B1/0238
Abstract: A vehicle heating system that includes a heating element and a power source for providing an electrical power to the heating element. Furthermore, the vehicle heating system includes a control unit, which is operatively coupled to the power source and/or the heating element. The control unit is adapted to regulate the electrical power to be supplied to the heating element over time and the control unit is configured to regulate the electrical power by modifying a DC voltage supply Usupply supplied to the heating element over time. The heat provided by the heating element is preferably in linear relationship with the DC voltage supply Usupply supplied to the heater.
Abstract translation: 一种车辆加热系统，包括加热元件和用于向加热元件提供电力的电源。 此外，车辆加热系统包括可操作地耦合到电源和/或加热元件的控制单元。 控制单元适于随时间调节供给到加热元件的电力，并且控制单元被配置为通过修改随时间提供给加热元件的直流电压供给来调节电功率。 由加热元件提供的热量优选与供给加热器的直流电压供给线圈关系。
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5.发明公开
公开(公告)号：US20240275383A1
公开(公告)日：2024-08-15
申请号：US18286283
申请日：2022-04-08
Inventor： Laurent LAMESCH , Tobias JUSTINGER , Michael PUETZ , Thomas FABER , Christoph WENDT , Johnny LORANG
IPC: H03K17/955 , B60N2/56 , B60R21/015 , H03K17/0812
CPC classification number: H03K17/955 , B60N2/5678 , B60R21/01532 , H03K17/08122
Abstract: An impedance measurement circuit for determining a complex impedance of a capacitive sensor that is configured for employing at least one electric heater member as an electrode to be operated in loading mode. The measurement circuit includes: a signal generating unit for providing an electric measurement signal; a signal sensing circuit measuring current through the at least one electric heater member; an electric heater member connection circuit comprising a plurality of MOSFETs for selectively electrically connecting the electric heater member either to the signal sensing circuit for complex impedance measurement or to a DC electric power unit for heating purposes; and a control and evaluation unit that is configured for controlling a switching status of the plurality of MOSFETs according to a predefined sequence, and for determining a complex impedance from the determined currents with reference to a complex reference potential during predefined stages of the predefined sequence.
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6.发明申请
公开(公告)号：US20180080802A1
公开(公告)日：2018-03-22
申请号：US15560915
申请日：2016-01-28
Inventor： Christian URIG , Christoph WENDT
CPC classification number: G01D5/24 , B60N2/002 , G01D18/00 , H03K17/955 , H03K2217/960705 , H03K2217/960765
Abstract: A capacitance measurement circuit for determining a sense current of a capacitive sensor which includes at least one electrically conductive sense electrode and at least one electrically conductive guard electrode. The measurement circuit includes at least one switch member that is remotely controllable by a switch remote control unit, wherein the at least one switch member in at least one closed state is configured to provide an additional electrical path between the at least one guard electrode and a reference potential.
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公开(公告)号：US20220155355A1
公开(公告)日：2022-05-19
申请号：US17602773
申请日：2020-04-07
Inventor： Bernd FARSCH , Attila KONFAR , Christian URIG , Christoph WENDT , Laurent LAMESCH
Abstract: A capacitance measurement circuit for determining complex electric currents in a multi-channel capacitive sensing device includes a first sensing circuit for selectively connecting one of a plurality of sense electrodes to a common sense node and for connecting a corresponding guard electrode of the sense electrode to a common guard node, and at least a second sensing circuit. A measurement signal voltage source provides an alternating measurement voltage to the common guard node in a remotely controllable manner. A diagnostic signal voltage source provides an alternating diagnostic voltage to the common guard node in a remotely controllable manner. A current measurement circuit is connected with a signal input port to the common sense node and with a reference input port to the output port of the measurement signal voltage source.
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公开(公告)号：US20200341041A1
公开(公告)日：2020-10-29
申请号：US16757413
申请日：2018-10-12
Inventor： Laurent LAMESCH , Michael PUETZ , Christoph WENDT , Gianluca FAVALLI
Abstract: A capacitive sensor system that includes: a sensor arrangement with a plurality of capacitive electrodes, each being connected to a corresponding detector line; and a detector device connected to each detector line and configured to detect the capacitance of each electrode by applying a detector signal. The sensor arrangement includes: at least one electrode group having at least two electrodes, each electrode of an electrode group being connected to another electrode via a resistive element so that all electrodes of this electrode group are connected in series; and a diagnose device that is connected, for each electrode group, at least to a first detector line of a first electrode and to a second detector line of a second detector electrode and is configured to apply a diagnose signal via the first and second detector lines and to detect a conductor break based on a response to the diagnose signal.
