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1. 发明申请

US20110154906A1 METHOD OF MEASURING A PHYSICAL PARAMETER AND ELECTRONIC INTERFACE CIRCUIT FOR A CAPACITIVE SENSOR FOR IMPLEMENTING THE SAME 有权
标题翻译：用于实现其电容式传感器的物理参数和电子接口电路的测量方法
公开(公告)号：US20110154906A1
公开(公告)日：2011-06-30
申请号：US12971403
申请日：2010-12-17
申请人： Sylvain Grosjean , Michel Willemin , Alexandre Deschildre , Beat Pfefferli
发明人： Sylvain Grosjean , Michel Willemin , Alexandre Deschildre , Beat Pfefferli
IPC分类号： G01L1/14
CPC分类号： G01P15/125 , G01D5/24
摘要： The measuring method is for measuring a physical parameter by means of an electronic interface circuit (1) for a capacitive sensor (2) with at least two capacitors (C1X, C2X) whose common electrode (CM) is mobile between the fixed electrodes. The electronic circuit includes an amplifier (4) connected to the common electrode (CM) by a switching unit (3), a logic unit (5) connected to the amplifier for supplying first and second digital measuring signals, and a digital-analogue converter (7) for supplying a measurement voltage (VDAC) to the electrodes on the basis of a conversion of one of the digital signals. The method consists in polarising firstly the electrodes of the capacitors by the measurement voltage (VDAC) on the basis of the first digital signals, then polarising the fixed electrode of the first capacitor (C1X) at a regulated voltage (VREG) and the fixed electrode of the second capacitor (C2X) at a low voltage (VSS), then polarising the electrodes of the capacitors (C1X, C2X, CM) by the measurement voltage (VDAC) on the basis of the second digital measuring signal, and finally polarising the fixed electrode of the first capacitor (C1X) at a low voltage (VSS) and the fixed electrode of the second capacitor (C2X) at a regulated voltage (VREG). At the end of the measuring cycles, the logic unit is able, on the basis of the first and second obtained digital measuring signals, to remove any voltage offset linked to the electronic components.
摘要翻译：该测量方法用于通过具有至少两个公共电极（CM）在固定电极之间移动的电容器（C1X，C2X）的电容式传感器（2）的电子接口电路（1）来测量物理参数。电子电路包括通过开关单元（3）连接到公共电极（CM）的放大器（4），连接到放大器的逻辑单元（5），用于提供第一和第二数字测量信号，以及数模转换器（7），用于基于数字信号之一的转换来向电极提供测量电压（VDAC）。该方法首先通过基于第一数字信号的测量电压（VDAC）首先偏置电容器的电极，然后以第一电容器（C1X）的固定电极以调节电压（VREG）和固定电极的第二电容器（C2X）的低电压（VSS），然后基于第二数字测量信号使电容器（C1X，C2X，CM）的电极偏移测量电压（VDAC），最后将低电压（VSS）的第一电容器（C1X）的固定电极和第二电容器（C2X）的固定电极处于调节电压（VREG）。在测量周期结束时，逻辑单元能够基于第一和第二获得的数字测量信号来去除与电子部件相关联的任何电压偏移。

2. 发明授权

US08429981B2 Method of measuring a physical parameter and electronic interface circuit for a capacitive sensor for implementing the same 有权
标题翻译：测量电容传感器的物理参数和电子接口电路的实现方法
公开(公告)号：US08429981B2
公开(公告)日：2013-04-30
申请号：US12971403
申请日：2010-12-17
申请人： Sylvain Grosjean , Michel Willemin , Alexandre Deschildre , Beat Pfefferli
发明人： Sylvain Grosjean , Michel Willemin , Alexandre Deschildre , Beat Pfefferli
IPC分类号： G01B7/16
CPC分类号： G01P15/125 , G01D5/24
摘要： The measuring method is for measuring a physical parameter using an electronic interface circuit (1) for a capacitive sensor (2) with at least two capacitors (C1X, C2X) whose common electrode (CM) is mobile between the fixed electrodes. The electronic circuit includes an amplifier (4) connected to the common electrode (CM) by a switching unit (3), a logic unit (5) connected to the amplifier for supplying first and second digital measuring signals, and a digital-analogue converter (7) for supplying a measurement voltage (VDAC) to the electrodes on the basis of a conversion of one of the digital signals. The method consists in polarizing firstly the electrodes of the capacitors by the measurement voltage (VDAC) on the basis of the first digital signals, then polarizing the fixed electrode of the first capacitor (C1X) at a regulated voltage (VREG) and the fixed electrode of the second capacitor (C2X) at a low voltage (VSS), then polarizing the electrodes of the capacitors (C1X, C2X, CM) by the measurement voltage (VDAC) on the basis of the second digital measuring signal, and finally polarizing the fixed electrode of the first capacitor (C1X) at a low voltage (VSS) and the fixed electrode of the second capacitor (C2X) at a regulated voltage (VREG). At the end of the measuring cycles, the logic unit is able, on the basis of the first and second obtained digital measuring signals, to remove any voltage offset linked to the electronic components.
摘要翻译：该测量方法用于使用具有至少两个公共电极（CM）在固定电极之间移动的电容器（C1X，C2X）的电容式传感器（2）的电子接口电路（1）来测量物理参数。电子电路包括通过开关单元（3）连接到公共电极（CM）的放大器（4），连接到放大器的逻辑单元（5），用于提供第一和第二数字测量信号，以及数模转换器（7），用于基于数字信号之一的转换来向电极提供测量电压（VDAC）。该方法首先通过基于第一数字信号的测量电压（VDAC）首先偏置电容器的电极，然后以第一电容器（C1X）的固定电极以调节电压（VREG）和固定电极的第二电容器（C2X）的低电压（VSS），然后基于第二数字测量信号使电容器（C1X，C2X，CM）的电极偏移测量电压（VDAC），最后将低电压（VSS）的第一电容器（C1X）的固定电极和第二电容器（C2X）的固定电极处于调节电压（VREG）。在测量周期结束时，逻辑单元能够基于第一和第二获得的数字测量信号来去除与电子部件相关联的任何电压偏移。

3. 发明授权

US08629684B2 Electronic circuit with a capacitive sensor for measuring a physical parameter and method of activating the electronic circuit 有权
标题翻译：具有用于测量物理参数的电容式传感器的电子电路和激活电子电路的方法
公开(公告)号：US08629684B2
公开(公告)日：2014-01-14
申请号：US12720764
申请日：2010-03-10
申请人： Alexandre Deschildre , Sylvain Grosjean , Michel Willemin
发明人： Alexandre Deschildre , Sylvain Grosjean , Michel Willemin
IPC分类号： G01R27/26
CPC分类号： G01D5/2417 , G01P15/125
摘要： The electronic circuit has a capacitive sensor that includes two capacitors mounted in differential, whose common electrode can move relative to each fixed electrode of the two capacitors to alter the capacitive value of each capacitor. The electronic circuit has an interface connected to the capacitive sensor, which includes a charge transfer amplifier unit connected to the common electrode, an integrator unit, and an excitation unit arranged between the output of the first integrator unit and the sensor to polarise each fixed electrode of the sensor capacitors at a determined voltage value. A compensation capacitor is connected to the input of the integrator unit. The electronic circuit interface includes comparison means for comparing the output voltage with a comparison voltage to control disconnection of the compensation capacitor at the integrator unit input, if the deviation between the output voltage and the comparison voltage exceeds a determined voltage threshold.
摘要翻译：电子电路具有电容传感器，其包括安装在差动器中的两个电容器，其公共电极可相对于两个电容器的每个固定电极移动，以改变每个电容器的电容值。电子电路具有连接到电容传感器的接口，其包括连接到公共电极的电荷传输放大器单元，积分器单元和布置在第一积分器单元的输出和传感器之间的激励单元，以使每个固定电极的传感器电容器以确定的电压值。补偿电容器连接到积分器单元的输入。如果输出电压和比较电压之间的偏差超过确定的电压阈值，则电子电路接口包括用于比较输出电压和比较电压以控制补偿电容器在积分器单元输入端的断开的比较装置。

4. 发明申请

US20100231237A1 ELECTRONIC CIRCUIT WITH A CAPACITIVE SENSOR FOR MEASURING A PHYSICAL PARAMETER AND METHOD OF ACTIVATING THE ELECTRONIC CIRCUIT 有权
标题翻译：具有用于测量物理参数的电容式传感器的电子电路和用于激活电子电路的方法
公开(公告)号：US20100231237A1
公开(公告)日：2010-09-16
申请号：US12720764
申请日：2010-03-10
申请人： Alexandre Deschildre , Sylvain Grosjean , Michel Willemin
发明人： Alexandre Deschildre , Sylvain Grosjean , Michel Willemin
IPC分类号： G01R27/26
CPC分类号： G01D5/2417 , G01P15/125
摘要： The electronic circuit (1) with a capacitive sensor (2) is used for measuring a physical parameter, such as an acceleration. The sensor includes two capacitors mounted in differential, whose common electrode (Cm) can move relative to each fixed electrode of the two capacitors to alter the capacitive value of each capacitor. The electronic circuit has an interface connected to the capacitive sensor, which includes a charge transfer amplifier unit (4) connected to the common electrode (Cm), an integrator unit (5) for integrating the charges supplied by the charge transfer amplifier unit, and an excitation unit (3) arranged between the output of the first integrator unit and the sensor to polarise each fixed electrode of the sensor capacitors at a determined voltage value. A compensation capacitor (Cc) is connected to the input of the integrator unit. The electronic circuit (1) interface includes comparison means (30) for comparing the output voltage (Vm) with a comparison voltage (Vc) so as to control disconnection of the compensation capacitor at the integrator unit (5) input, if the deviation between the output voltage (Vm) and the comparison voltage (Vc) is above a determined voltage threshold.
摘要翻译：具有电容传感器（2）的电子电路（1）用于测量诸如加速度的物理参数。该传感器包括两个安装在差分电容器中的电容器，其公共电极（Cm）可相对于两个电容器的每个固定电极移动，以改变每个电容器的电容值。电子电路具有连接到电容传感器的接口，其包括连接到公共电极（Cm）的电荷传输放大器单元（4），用于对由电荷传输放大器单元提供的电荷进行积分的积分器单元（5）和激励单元（3），布置在第一积分器单元的输出端与传感器之间，以确定的电压值使传感器电容器的每个固定电极偏振。补偿电容器（Cc）连接到积分器单元的输入端。电子电路（1）接口包括比较装置（30），用于将输出电压（Vm）与比较电压（Vc）进行比较，以便控制积分器单元（5）输入端的补偿电容器的断开，输出电压（Vm）和比较电压（Vc）高于确定的电压阈值。

5. 发明申请

US20130006559A1 METHOD FOR REDUCING NON-LINEARITY DURING MEASUREMENT OF A PHYSICAL PARAMETER AND ELECTRONIC CIRCUIT FOR IMPLEMENTING THE SAME 有权
标题翻译：用于在物理参数测量期间减少非线性的方法和用于实现其的电子电路
公开(公告)号：US20130006559A1
公开(公告)日：2013-01-03
申请号：US13534405
申请日：2012-06-27
申请人： Sylvain GROSJEAN , Alexandre Deschildre
发明人： Sylvain GROSJEAN , Alexandre Deschildre
IPC分类号： G01R35/00 , G06F19/00
CPC分类号： G01D3/032 , G01D5/241 , G01L1/144 , G01P15/125 , G01P15/18
摘要： A method for reducing the non-linearity effect of a digital-analogue converter. An electronic circuit includes an amplifier and a digital-analogue converter for supplying a measuring voltage. The method includes biasing the capacitor electrodes by the measuring voltage on the basis of the first digital signal, then biasing the fixed electrode of the first capacitor at a regulated voltage and the fixed electrode of the second capacitor at a low voltage, then biasing the capacitor electrodes by the measuring voltage on the basis of a second digital measuring signal, and finally biasing the fixed electrode of the first capacitor at a low voltage and the fixed electrode of the second capacitor at a regulated voltage. A defined offset voltage is introduced into the digital-analogue converter to modulate the first and second digital signals. A mean is taken of the two digital signals to reduce the non-linearity effect of the converter.
摘要翻译：一种用于降低数模转换器的非线性效应的方法。电子电路包括用于提供测量电压的放大器和数模转换器。该方法包括基于第一数字信号将电容器电极偏置测量电压，然后将第一电容器的固定电极以稳定电压和第二电容器的固定电极施加低电压，然后偏置电容器电极基于第二数字测量信号通过测量电压，并且最终以低电压偏置第一电容器的固定电极和第二电容器的固定电极处于调节电压。定义的偏移电压被引入到数模转换器中以调制第一和第二数字信号。采用两个数字信号的平均值来降低转换器的非线性效应。

6. 发明授权

US09097556B2 Method for reducing non-linearity during measurement of a physical parameter and electronic circuit for implementing the same 有权
标题翻译：减少用于物理参数和电子电路的测量期间的非线性的方法
公开(公告)号：US09097556B2
公开(公告)日：2015-08-04
申请号：US13534405
申请日：2012-06-27
申请人： Sylvain Grosjean , Alexandre Deschildre
发明人： Sylvain Grosjean , Alexandre Deschildre
IPC分类号： G01D3/032 , G01D5/241 , G01L1/14 , G01P15/125 , G01P15/18
CPC分类号： G01D3/032 , G01D5/241 , G01L1/144 , G01P15/125 , G01P15/18
摘要： A method for reducing the non-linearity effect of a digital-analog converter on an electronic interface circuit of a capacitive sensor. The electronic circuit includes an amplifier connected to the common electrode by a switching unit, a logic unit connected to the amplifier for supplying first and second digital measuring signals, and a digital-analog converter for supplying a measuring voltage to the electrodes. The method includes firstly biasing the capacitor electrodes by the measuring voltage, then biasing the fixed electrode of the first capacitor at a regulated voltage and the fixed electrode of the second capacitor at a low voltage, then biasing the capacitor electrodes by the measuring voltage, and finally biasing the fixed electrode of the first capacitor at a low voltage and the fixed electrode of the second capacitor at a regulated voltage.
摘要翻译：一种用于降低数模转换器对电容式传感器的电子接口电路的非线性效应的方法。电子电路包括通过开关单元连接到公共电极的放大器，连接到用于提供第一和第二数字测量信号的放大器的逻辑单元，以及用于向电极提供测量电压的数模转换器。该方法包括首先通过测量电压偏置电容器电极，然后将第一电容器的固定电极以调节电压和第二电容器的固定电极以低电压偏置，然后通过测量电压偏置电容器电极，以及最后将第一电容器的固定电极以低电压偏置，并将第二电容器的固定电极调节到稳定的电压。

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