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1. 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。

2. 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。

3. 发明授权

US08051711B2 Electronic circuit for measuring a physical parameter supplying an analogue measurement signal dependent upon the supply voltage 有权
标题翻译：用于测量根据电源电压提供模拟测量信号的物理参数的电子电路
公开(公告)号：US08051711B2
公开(公告)日：2011-11-08
申请号：US12207689
申请日：2008-09-10
申请人： Sylvain Grosjean , Michel Willemin , Beat Pfefferli
发明人： Sylvain Grosjean , Michel Willemin , Beat Pfefferli
IPC分类号： G01P15/00
CPC分类号： G01C19/00
摘要： The electronic circuit for measuring at least one physical parameter supplies an analogue output measurement signal (SA) dependent upon the value of a supply voltage. The circuit includes a sensor interface, connected to a sensor for supplying an analogue measurement signal (Vm) which is then filtered, an analogue-digital converter for digitally converting the filtered signal (Sm), and a digital signal control and processing unit for receiving a converted signal from the converter and supplying a digital measurement signal (SD). The sensor interface, the analogue-digital converter, and the processing unit are powered by a voltage regulator. The analogue and digital measurement signals are thus independent of any variation in the supply voltage (VCC) of the electronic circuit. A ratiometric unit, which may be an analogue multiplier or an analogue-digital converter, is powered by the supply voltage source (Bat) to recreate ratiometry on SA on the basis of Sm or SD.
摘要翻译：用于测量至少一个物理参数的电子电路根据电源电压的值提供模拟输出测量信号（SA）。电路包括传感器接口，连接到用于提供模拟测量信号（Vm）的传感器，然后被滤波，模数转换器用于对滤波信号（Sm）进行数字转换;以及数字信号控制和处理单元，用于接收来自转换器的转换信号并提供数字测量信号（SD）。传感器接口，模拟数字转换器和处理单元由电压调节器供电。因此，模拟和数字测量信号与电子电路的电源电压（VCC）的任何变化无关。可以是模拟乘法器或模拟数字转换器的比例单元由电源电压源（Bat）供电，以基于Sm或SD在SA上重建比率测量。

4. 发明申请

US20090066392A1 ELECTRONIC CIRCUIT FOR MEASURING A PHYSICAL PARAMETER SUPPLYING AN ANALOGUE MEASUREMENT SIGNAL DEPENDENT UPON THE SUPPLY VOLTAGE 有权
标题翻译：电子电路，用于测量根据供电电压提供模拟测量信号的物理参数
公开(公告)号：US20090066392A1
公开(公告)日：2009-03-12
申请号：US12207689
申请日：2008-09-10
申请人： Sylvain Grosjean , Michel Willemin , Beat Pfefferli
发明人： Sylvain Grosjean , Michel Willemin , Beat Pfefferli
IPC分类号： H03G99/00
CPC分类号： G01C19/00
摘要： The electronic circuit (1) for measuring at least one physical parameter supplies an analogue output measurement signal (SA) dependent upon the value of a supply voltage. The circuit includes a sensor interface (2) connected to a sensor (C) for supplying an analogue measurement signal (Vm) which is then filtered. The circuit further includes an analogue-digital converter (8) for digitally converting the filtered signal (Sm), a digital signal control and processing unit (9) for receiving a converted signal from the converter, and supplying a digital measurement signal (SD). The sensor interface, the analogue-digital converter and the processing unit (9) are powered by a regulated voltage supplied by a voltage regulator (4). The analogue and digital measurement signals are thus independent of any variation in the supply voltage (VCC) of the electronic unit. A ratiometric unit, which may be an analogue multiplier (5) or a digital-analogue converter, is powered for example by the supply voltage source (Bat) in order to recreate the ratiometry on an analogue output measurement signal (SA) on the basis of the analogue (Sm) or digital (SD) measurement signal.
摘要翻译：用于测量至少一个物理参数的电子电路（1）根据电源电压的值提供模拟输出测量信号（SA）。电路包括连接到传感器（C）的传感器接口（2），用于提供模拟测量信号（Vm），然后将其过滤。电路还包括用于数字转换滤波信号（Sm）的模数转换器（8），用于从转换器接收转换信号的数字信号控制和处理单元（9），并提供数字测量信号（SD）。传感器接口，模拟数字转换器和处理单元（9）由电压调节器（4）提供的调节电压供电。因此，模拟和数字测量信号与电子单元的电源电压（VCC）的任何变化无关。可以是模拟乘法器（5）或数模转换器的比例单元例如由电源电压源（Bat）供电，以便在模拟输出测量信号（SA）上重建比率测量的模拟（Sm）或数字（SD）测量信号。

5. 发明申请

US20060179943A1 ELECTRONIC CIRCUIT INCLUDING A LOW NOISE LEVEL CAPACITIVE SENSOR AND ACCELEROMETER FITTED WITH THE SAME 审中-公开
标题翻译：包含低噪声电容式传感器和加速度计的电子电路
公开(公告)号：US20060179943A1
公开(公告)日：2006-08-17
申请号：US11276303
申请日：2006-02-23
申请人： Michel WILLEMIN , Beat Pfefferli
发明人： Michel WILLEMIN , Beat Pfefferli
IPC分类号： G01P15/125
CPC分类号： G01P15/125 , G01P15/18
摘要： The invention concerns an electronic circuit (10) for measuring a force, including a capacitive sensor (12) connected to a capacitive bridge (14), of the type wherein the capacitive sensor (12) includes a moving electrode (16) suspended elastically between a first (18) and a second (20) fixed electrode so as to form respectively a first (C1) and a second (C2) capacitor whose capacitance is variable, of the type wherein the capacitive bridge (14) generates an electric output signal (Vs), which is a function of the capacitance variations of the capacitors (C1, C2), of the type wherein the capacitance value of each capacitor (C1, C2) is substantially lower than one picofarad, when the moving electrode (16) occupies a rest position, and of the type wherein the excitation frequency of the circuit (10) is comprised overall within the low frequency range, characterised in that a series impedance element (26, 28, 30) is interposed between each of the three electrodes (16, 18, 20) and the capacitive bridge (14) so as to form a low-pass filter. The invention also proposes an accelerometer fitted with this circuit (10).
摘要翻译：本发明涉及一种用于测量力的电子电路（10），其包括连接到电容电桥（14）的电容传感器（12），其中电容传感器（12）包括在第一（18）和第二（20）固定电极，以分别形成电容可变的第一（C 1）和第二（C 2）电容器，其中电容电桥（14）产生电输出信号（Vs），其是电容器（C 1，C 2）的电容变化的函数，其中每个电容器（C 1，C 2）的电容值大大低于一个皮法，当移动电极（16）处于静止位置，并且其中电路（10）的激励频率整体地包括在低频范围内的类型，其特征在于，插入串联阻抗元件（26,28,30）三者之间的每一个（16,18,20）和电容桥（14），以形成低通滤波器。本发明还提出了一种装有该电路（10）的加速度计。

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