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1. 发明公开

US20230159080A1 TDR-BASED SYSTEM FOR DETECTION OF HAND TOUCH POSITIONINGS ON AN OBJECT, PARTICULARLY ON A STEERING WHEEL FOR THE PURPOSE OF HAND GESTURE RECOGNITION 审中-公开
公开(公告)号：US20230159080A1
公开(公告)日：2023-05-25
申请号：US17915023
申请日：2021-03-25
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Baptiste Anti , Laurent LAMESCH , Thomas Faber , Thomas Stifter , Michael Puetz , Andreas Fox
IPC分类号： B62D1/04 , B60K37/06 , G06F3/01
CPC分类号： B62D1/046 , B60K37/06 , G06F3/017
摘要： A sensing system and method of recognizing a hand gesture established by a sequence of hand touch positionings on an object. The method includes at least steps of: providing to a signal line a time-dependent measurement signal; receiving the measurement signal after being at least partially reflected by at least one portion of the signal line; determining positions on the object of the portions of the signal line that have reflected the measurement signal; comparing an obtained plurality of stored successively determined positions on the object with at least one predefined pattern of successive positions to derive a measure of similarity; and providing an output signal that is indicative of the predefined pattern of successive positions if the derived measure of similarity is lower than a predefined threshold value.

2. 发明申请

US20210013882A1 DIAGNOSTICS FOR CAPACITIVE SENSOR 有权
公开(公告)号：US20210013882A1
公开(公告)日：2021-01-14
申请号：US16968577
申请日：2019-02-07
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Laurent LAMESCH
IPC分类号： H03K17/955 , G01D5/24
摘要： A capacitance measurement circuit for determining a complex electric current of at least one capacitive sense-guard sensor. The circuit includes an alternating signal voltage source, wherein each guard electrode is electrically connectable to the signal voltage source, a current measurement circuit having at least one measurement channel to determine a measurement current through a sense electrode, and at least one diagnostics channel to determine, with reference to an AC ground potential, a diagnostic current flowing through a guard electrode and a sense electrode of a capacitive sensor, and a remotely controllable switching unit, which in a measurement switching state is configured to electrically connect the sense electrode of the capacitive sensor to the measurement channel, and in a diagnostic switching state is configured to electrically connect the sense electrode to the diagnostics channel.

3. 发明申请

US20190047502A1 CAPACITIVE MEASUREMENT CIRCUIT WITH SENSOR WIRING DIAGNOSTICS 审中-公开
公开(公告)号：US20190047502A1
公开(公告)日：2019-02-14
申请号：US16073246
申请日：2017-01-24
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Laurent LAMESCH
IPC分类号： B60R21/015 , B60N2/00 , H03K17/955
摘要： A capacitance measurement circuit for determining a sense current of a capacitive sensor with a sense electrode and a guard electrode. The measurement circuit includes a periodic signal voltage source, a sense current measurement circuit configured for determining the sense current with reference to a reference voltage, and at least one remotely controllable switch member. In a first switching state, the at least one switch member electrically connects the sense current measurement circuit to the periodic signal voltage source for providing a first reference voltage, and in a second switching state, the at least one switch member electrically connects the sense current measurement circuit to a second reference voltage that is different from the first reference voltage.

4. 发明申请

US20160156366A1 CAPACITIVE SENSING SYSTEM AND METHOD 有权
标题翻译：电容式感应系统及方法
公开(公告)号：US20160156366A1
公开(公告)日：2016-06-02
申请号：US14897854
申请日：2014-06-11
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Laurent LAMESCH
IPC分类号： H03M1/20 , H03M1/12 , H03C3/02
CPC分类号： H03M1/20 , H03C3/02 , H03M1/124 , H03M1/201
摘要： A capacitive sensing system operates according to a method which uses an ADC with a low resolution r, to produce a digital signal with a higher resolution R. The analog signal to be digitized is modulated with a triangular or saw-tooth modulating signal, so that a modulated analog signal is obtained, which is sampled with the ADC. Thereby, digital samples are produced. An average is taken over N (>1) successive digital samples. The triangular or saw-tooth signal is chosen to have a peak-to-peak amplitude corresponding at least approximately to an integer multiple L, with L≧1, of the quantization step size of the ADC. The saw-tooth or triangular signal, furthermore, has a number M, of periods per each sequence of N samples. M and N are chosen such that M>1 and M≠N and such that R=r*N/(k*gcd(N, M)*L), where gcd(M, N) is the greatest common divisor of N and M and where k=2 if the modulating signal is a saw-tooth signal and k=4 if the modulating signal is a triangular signal.
摘要翻译：电容式感测系统根据使用具有低分辨率r的ADC的方法进行工作，以产生具有更高分辨率R的数字信号。要被数字化的模拟信号用三角形或锯齿调制信号调制，使得得到一个调制的模拟信号，用ADC进行采样。从而产生数字样本。 N（> 1）个连续数字样本的平均数。三角形或锯齿状信号被选择为具有至少近似于ADC的量化步长的L≥1的整数倍L的峰峰值幅度。此外，锯齿或三角形信号具有每个N个样本的每个序列的周期数M。 M和N被选择为使得M> 1且M≠N，并且使得R = r * N /（k * gcd（N，M）* L），其中gcd（M，N）是N的最大公约数如果调制信号是锯齿信号，则k = 2，如果调制信号是三角形信号，则k = 4。

5. 发明公开

US20240003947A1 LOW-COST, HIGH MEASUREMENT SPEED CAPACITIVE SENSING CIRCUIT FOR LOADING MODE OPERATION OF CAPACITIVE SENSORS 审中-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
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Laurent LAMESCH , Tobias JUSTINGER , Michael PÜTZ , Thomas FABER , Christoph WENDT , Johnny LORANG
IPC分类号： G01R27/02 , B60N2/00 , H03K17/955
CPC分类号： G01R27/02 , B60N2/0021 , H03K17/955 , B60N2210/12 , H03K2217/960735
摘要： 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.

6. 发明申请

US20210359682A1 SENSOR ARRANGEMENT FOR CAPACITIVE POSITION DETECTION OF A HAND ON A STEERING WHEEL 有权
公开(公告)号：US20210359682A1
公开(公告)日：2021-11-18
申请号：US17296918
申请日：2019-11-22
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Thomas FABER , Gianluca FAVALLI , Heinrich GIERENS , Laurent LAMESCH , Michael PÜTZ
IPC分类号： H03K17/96 , B62D1/04 , B62D1/06 , G01D5/241
摘要： A sensor arrangement for capacitive position detection of a hand on a steering wheel. The sensor arrangement includes: a plurality of capacitive sensors disposed along a detection surface, which is an outer surface of the steering wheel, each sensor having at least one sensor electrode; and a measurement device electrically connected to the sensors. In order to increase the reliability of capacitive hand detection on a steering wheel, the measurement device is adapted to perform a sequence of detection operations, and in each detection operation, to activate at least one sensor by applying a detection signal to its at least one sensor electrode in order to capacitively detect the hand while grounding at least one other sensor by connecting at least one of its sensor electrodes to ground, and to activate different sensors in consecutive detection operations.

7. 发明申请

US20190031130A1 CAPACITIVE SEAT OCCUPANCY DETECTION AND CLASSIFICATION SYSTEM 审中-公开
公开(公告)号：US20190031130A1
公开(公告)日：2019-01-31
申请号：US16073211
申请日：2017-01-24
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Laurent LAMESCH , Michael PÜTZ
IPC分类号： B60R21/015 , B60N2/00 , H03K17/955
摘要： A capacitive vehicle seat occupancy detection and classification system includes an impedance measurement circuit and a control and evaluation unit. The impedance measurement circuit is configured for providing periodic electrical measurement signals to a capacitive sensor of N different fundamental frequencies, wherein N is a natural number of at least 3, and to determine a complex impedance from each of determined sense currents in the capacitive sensor. The control and evaluation unit is configured to determine a seat occupancy class for each one of the complex impedances determined at the at least N different fundamental frequencies, and to determine a final seat occupancy class derived by a majority decision among the determined seat occupancy classes.

8. 发明申请

US20180358941A1 CAPACITIVE LOADING MODE MEASUREMENT CIRCUIT WITH COMPENSATION OF MEASUREMENT ERRORS DUE TO PARASITIC SENSOR IMPEDANCES 审中-公开
公开(公告)号：US20180358941A1
公开(公告)日：2018-12-13
申请号：US16062473
申请日：2016-12-09
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Laurent LAMESCH
IPC分类号： H03F3/45 , G01D5/24 , H03F3/387
摘要： An impedance measurement circuit for determining a sense current of a guard-sense capacitive sensor operated in loading mode. The circuit includes a periodic signal voltage source for providing a periodic measurement voltage, a sense current measurement circuit, a differential amplifier that is configured to sense a complex voltage difference between the sense electrode and the guard electrode, a demodulator for obtaining, with reference to the periodic measurement voltage, an in-phase component and a quadrature component of the sensed complex voltage difference, and control loops for receiving the in-phase component and the quadrature component, respectively. An output signal of the first control loop and an output signal of the second control loop are usable to form a complex voltage that serves as a complex reference voltage for the sense current measurement circuit.

9. 发明申请

US20180241394A1 METHOD OF OPERATING A CAPACITIVE SENSOR SYSTEM FOR VEHICLE TRUNK OPENER AND ROBUST CAPACITIVE SENSOR SYSTEM 审中-公开
公开(公告)号：US20180241394A1
公开(公告)日：2018-08-23
申请号：US15752179
申请日：2016-08-12
申请人： IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
发明人： Michael VIRNICH , Laurent LAMESCH
IPC分类号： H03K17/955 , G07C9/00 , E05F15/70
摘要： A method of operating a capacitive loading-mode sensor system with regard to generating a trigger signal indicative of an occurrence of an event. The capacitive loading-mode sensor system includes at least one capacitive sensor and a sensor control unit configured for operating the at least one capacitive sensor in loading mode and including a signal generating unit and a signal evaluation unit. Based on acquired real part and imaginary part of the momentary sensor output signal, an absolute value of change of at least one out of a complex impedance or a complex admittance sensed by the at least one capacitive sensor is determined, and a trigger signal is generated by the signal evaluation unit if at least one predetermined condition concerning the determined absolute value of change of the complex impedance or the complex admittance is fulfilled.

10. 发明申请

US20180035106A1 CAMERA HEAD WITH INTEGRATED CALIBRATION TABLES 审中-公开
公开(公告)号：US20180035106A1
公开(公告)日：2018-02-01
申请号：US15127222
申请日：2015-03-19
申请人： IEE International Electronics & Engineering S.A.
发明人： Laurent LAMESCH , Laurent THIRY
IPC分类号： H04N17/00 , H04N5/225 , G06K9/00 , H04N5/217
摘要： A camera based driver assistance system or vehicle safety system comprises a camera head including at least one imager unit for recording image data and converting said image data into a digital image signal and a serializing unit for providing said digital image signal at an output of said camera head. The camera system further includes a main processor unit connected to the output of said camera head by means of a data link connection for receiving and processing said digital image signal from said camera head. According to the invention, the camera head comprises at least one bloc containing calibration data for said imager and a digital control circuit, said bloc and/or said digital control circuit being operatively coupled to said serializing unit and configured in such a way that said calibration data are transferable to said serializing unit and subsequently transmittable to said main processor unit to be used in the processing of said digital signal from said camera head.

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