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公开(公告)号：US08374817B2
公开(公告)日：2013-02-12
申请号：US12594244
申请日：2008-03-27
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： An electronic device has an orientation sensing system for determining an orientation of the device. The system includes a magnetometer and an accelerometer. The system further has a calibration device configured to calibrate the sensing system for operational use. The accelerometer supplies measurements used to constrain a range of possible directions of the external magnetic field to be determined. The calibration device numerically solves a set of equations and is equally usable for a 2D or 3D magnetometer in combination with a 2D or 3D accelerometer.
摘要翻译： 电子设备具有用于确定设备的取向的定向感测系统。 该系统包括磁力计和加速度计。 该系统还具有被配置为校准感测系统以用于操作使用的校准装置。 加速度计提供用于限制要确定的外部磁场的可能方向的范围的测量。 校准装置以数字方式解决一组方程式，并且可与2D或3D加速度计结合使用的二维或三维磁强计同样适用。
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公开(公告)号：US07818890B2
公开(公告)日：2010-10-26
申请号：US12516173
申请日：2007-11-20
IPC分类号： G01B17/30
CPC分类号： G01R33/093 , B82Y25/00 , G01R33/096
摘要： A magnetic field sensor circuit comprises a first magneto-resistive sensor (Rx) which senses a first magnetic field component in a first direction to supply a first sense signal (Vx). A first flipping coil (FC1) applies a first flipping magnetic field with a periodically changing polarity to the first magneto-resistive sensor (Rx) to cause the first sense signal (Vx) to have alternating different levels synchronized with the first flipping magnetic field. A second magneto -resistive sensor (Ry) senses a second magnetic field component in a second direction different than the first direction to supply a second sense signal (Vy). A second flipping coil (FC2) applies a second flipping magnetic field with a periodically changing polarity to the second magneto -resistive sensor (Ry) to cause the second sense signal (Vy) to have an alternating different levels synchronized with the second flipping magnetic field. The first flipping magnetic field and the second flipping magnetic field have a phase shift. A differential amplifier (AMP1) receives the first sense signal (Vx) and the second sense signal (Vy) to obtain a difference signal (Vd). A first synchronous demodulator (DEM1) receives the difference signal (Vd) and a first switching signal (Q1) being phase locked to the alternating different levels of the first sense signal (Vx) to supply a first output signal (Vox) indicating the first magnetic field component. A second synchronous demodulator (DEM2) receives the difference signal (Vd) and a second switching signal (Q2) being phase locked to the alternating different levels of the second sense signal (Vy) to supply a second output signal (Voy) indicating the second magnetic field component.
摘要翻译： 磁场传感器电路包括第一磁阻传感器（Rx），其感测第一方向上的第一磁场分量以提供第一感测信号（Vx）。 第一翻转线圈（FC1）将具有周期性变化的极性的第一翻转磁场施加到第一磁阻传感器（Rx），以使第一感测信号（Vx）具有与第一翻转磁场同步的交替的不同级别。 第二磁阻传感器（Ry）在与第一方向不同的第二方向上感测第二磁场分量以提供第二感测信号（Vy）。 第二翻转线圈（FC2）将具有周期性变化的极性的第二翻转磁场施加到第二磁阻传感器（Ry），以使第二感测信号（Vy）具有与第二翻转磁场同步的交替的不同级别 。 第一翻转磁场和第二翻转磁场具有相移。 差分放大器（AMP1）接收第一感测信号（Vx）和第二感测信号（Vy）以获得差分信号（Vd）。 第一同步解调器（DEM1）接收差分信号（Vd）和第一切换信号（Q1）被锁相到第一感测信号（Vx）的交替不同电平，以提供表示第一感测信号（Vox）的第一输出信号 磁场分量。 第二同步解调器（DEM2）接收差分信号（Vd）和相位锁定到第二感测信号（Vy）的交替不同电平的第二切换信号（Q2），以提供指示第二感测信号（Vy）的第二输出信号（Voy） 磁场分量。
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公开(公告)号：US20100121599A1
公开(公告)日：2010-05-13
申请号：US12594244
申请日：2008-03-27
CPC分类号： G01C17/38
摘要： An electronic device has an orientation sensing system for determining an orientation of the device. The system comprises a magnetometer and an accelero meter. The system further has calibration means to calibrate the sensing system for operational use. The accelerometer supplies measurements used to constrain a range of possible directions of the external magnetic field to be determined. The calibration means numerically solves a set of equations and is equally well useable for a 2D or 3D magnetometer in combination with a 2D or 3D accelerometer.
摘要翻译： 电子设备具有用于确定设备的取向的定向感测系统。 该系统包括磁力计和加速度计。 该系统还具有用于校准用于操作使用的感测系统的校准装置。 加速度计提供用于限制要确定的外部磁场的可能方向的范围的测量。 校准装置在数值上解决了一组方程，并且与2D或3D加速度计结合使用的二维或三维磁强计同样适用。
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公开(公告)号：US20100053789A1
公开(公告)日：2010-03-04
申请号：US12516173
申请日：2007-05-27
CPC分类号： G01R33/093 , B82Y25/00 , G01R33/096
摘要： A magnetic field sensor circuit comprises a first magneto-resistive sensor (Rx) which senses a first magnetic field component in a first direction to supply a first sense signal (Vx). A first flipping coil (FC1) applies a first flipping magnetic field with a periodically changing polarity to the first magneto-resistive sensor (Rx) to cause the first sense signal (Vx) to have alternating different levels synchronized with the first flipping magnetic field. A second magneto -resistive sensor (Ry) senses a second magnetic field component in a second direction different than the first direction to supply a second sense signal (Vy). A second flipping coil (FC2) applies a second flipping magnetic field with a periodically changing polarity to the second magneto -resistive sensor (Ry) to cause the second sense signal (Vy) to have an alternating different levels synchronized with the second flipping magnetic field. The first flipping magnetic field and the second flipping magnetic field have a phase shift. A differential amplifier (AMP1) receives the first sense signal (Vx) and the second sense signal (Vy) to obtain a difference signal (Vd). A first synchronous demodulator (DEM1) receives the difference signal (Vd) and a first switching signal (Q1) being phase locked to the alternating different levels of the first sense signal (Vx) to supply a first output signal (Vox) indicating the first magnetic field component. A second synchronous demodulator (DEM2) receives the difference signal (Vd) and a second switching signal (Q2) being phase locked to the alternating different levels of the second sense signal (Vy) to supply a second output signal (Voy) indicating the second magnetic field component.
摘要翻译： 磁场传感器电路包括第一磁阻传感器（Rx），其感测第一方向上的第一磁场分量以提供第一感测信号（Vx）。 第一翻转线圈（FC1）将具有周期性变化的极性的第一翻转磁场施加到第一磁阻传感器（Rx），以使第一感测信号（Vx）具有与第一翻转磁场同步的交替的不同级别。 第二磁阻传感器（Ry）在与第一方向不同的第二方向上感测第二磁场分量以提供第二感测信号（Vy）。 第二翻转线圈（FC2）将具有周期性变化的极性的第二翻转磁场施加到第二磁阻传感器（Ry），以使第二感测信号（Vy）具有与第二翻转磁场同步的交替的不同级别 。 第一翻转磁场和第二翻转磁场具有相移。 差分放大器（AMP1）接收第一感测信号（Vx）和第二感测信号（Vy）以获得差分信号（Vd）。 第一同步解调器（DEM1）接收差分信号（Vd）和第一切换信号（Q1）被锁相到第一感测信号（Vx）的交替不同电平，以提供表示第一感测信号（Vox）的第一输出信号 磁场分量。 第二同步解调器（DEM2）接收差分信号（Vd）和相位锁定到第二感测信号（Vy）的交替不同电平的第二切换信号（Q2），以提供指示第二感测信号（Vy）的第二输出信号（Voy） 磁场分量。
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公开(公告)号：US07937845B2
公开(公告)日：2011-05-10
申请号：US12594233
申请日：2008-03-27
摘要： An electronic compass has a 2D magnetometer for determining two of the three components of the earth-magnetic field vector. Values for the magnitude and inclination of the field at the location of the device are given. If at least one of the body axes of the device is held horizontally in operational use, an educated guess can be made about the actual orientation of the device (e.g., heading and tilt angles) with respect to the earth. Accordingly, this compass is a very-low cost device.
摘要翻译： 电子罗盘具有用于确定地磁场矢量的三个分量中的两个的2D磁力计。 给出了设备位置的场的幅度和倾角值。 如果设备的至少一个身体轴线水平地保持在操作使用中，则可以对设备的实际取向（例如，航向和倾斜角度）相对于地球做出有根据的猜测。 因此，该罗盘是非常低成本的装置。
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公开(公告)号：US20100323337A1
公开(公告)日：2010-12-23
申请号：US12866381
申请日：2009-02-19
IPC分类号： A46B15/00
CPC分类号： A61C17/221 , A46B15/0002 , A46B15/0006 , A46B15/0038 , A46B15/004 , A46B2200/1066 , A61C17/22
摘要： The dental position tracking system includes a toothbrush (30) which has a system (20) for determining the orientation of the toothbrush in the mouth of a user relative to the earth, based on measured stored information. Information is stored in the toothbrush concerning target ranges of expected measured toothbrush orientations for each of a plurality of dental zones (22). A processor (24) compares the measured toothbrush orientation information with the target orientation ranges, following conversion of both the target orientation information and the measured toothbrush orientation information to the same coordinate system. The processor then determines which if any of the target ranges matches, within a selected tolerance thereof, with the toothbrush orientation information. Any difference between the target range and the measured toothbrush orientation information is then used to partially adjust the target information range, in order to compensate for a change of position of the user's head.
摘要翻译： 牙科位置跟踪系统包括牙刷（30），其具有系统（20），用于基于测量的存储信息来确定使用者口中相对于地球的牙刷的取向。 信息存储在牙刷中，用于针对多个牙齿区域（22）中的每一个的预期测量的牙刷取向的目标范围。 在将目标方向信息和所测量的牙刷取向信息两者转换到同一坐标系之后，处理器（24）将所测量的牙刷取向信息与目标取向范围进行比较。 然后，处理器确定在其所选公差内是否有任何目标范围与牙刷取向信息相匹配。 然后使用目标范围和测量的牙刷定位信息之间的任何差异来部分地调整目标信息范围，以便补偿用户头部的位置的改变。
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公开(公告)号：US20100114517A1
公开(公告)日：2010-05-06
申请号：US12594223
申请日：2008-03-27
CPC分类号： G01C21/165 , G01C17/28
摘要： An orientation sensing system uses an algorithm that iteratively improves an estimate of the body attitude. In each iteration, an error vector is generated that represents the difference between the actually measured sensor signals on the one hand, and a model-based prediction of these sensor signals, given the attitude estimate of the previous iteration, on the other hand. From the compound sensor data error vector, an attitude estimation error (a 3 degrees-of-freedom rotation) is calculated by multiplying the compound error vector by the pseudo-inverse of a sensitivity matrix. An improved attitude estimate is then obtained by applying the inverse of the attitude estimation error to the old attitude estimate.
摘要翻译： 方向检测系统使用迭代地改善身体姿态估计的算法。 在每次迭代中，产生一个误差矢量，代表了一方面实际测量的传感器信号与另一方面给出了前一次迭代的姿态估计的这些传感器信号的基于模型的预测之间的差异。 从复合传感器数据误差向量，通过将复合误差向量乘以灵敏度矩阵的伪反相来计算姿态估计误差（3自由度旋转）。 然后通过将姿态估计误差的倒数应用于旧的姿态估计值来获得改进的姿态估计。
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公开(公告)号：US08690579B2
公开(公告)日：2014-04-08
申请号：US12866381
申请日：2009-02-19
CPC分类号： A61C17/221 , A46B15/0002 , A46B15/0006 , A46B15/0038 , A46B15/004 , A46B2200/1066 , A61C17/22
摘要： The dental position tracking system includes a toothbrush (30) which has a system (20) for determining the orientation of the toothbrush in the mouth of a user relative to the earth, based on measured stored information. Information is stored in the toothbrush concerning target ranges of expected measured toothbrush orientations for each of a plurality of dental zones (22). A processor (24) compares the measured toothbrush orientation information with the target orientation ranges, following conversion of both the target orientation information and the measured toothbrush orientation information to the same coordinate system. The processor then determines which if any of the target ranges matches, within a selected tolerance thereof, with the toothbrush orientation information. Any difference between the target range and the measured toothbrush orientation information is then used to partially adjust the target information range, in order to compensate for a change of position of the user's head.
摘要翻译： 牙科位置跟踪系统包括牙刷（30），其具有系统（20），用于基于测量的存储信息来确定使用者口中相对于地球的牙刷的取向。 信息存储在牙刷中，用于针对多个牙齿区域（22）中的每一个的预期测量的牙刷取向的目标范围。 在将目标方向信息和所测量的牙刷取向信息两者转换到同一坐标系之后，处理器（24）将所测量的牙刷取向信息与目标取向范围进行比较。 然后，处理器确定在其所选公差内是否有任何目标范围与牙刷取向信息相匹配。 然后使用目标范围和测量的牙刷定位信息之间的任何差异来部分地调整目标信息范围，以便补偿用户头部的位置的改变。
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公开(公告)号：US20100115779A1
公开(公告)日：2010-05-13
申请号：US12594233
申请日：2008-03-27
摘要： An electronic compass has a 2D magnetometer for determining two of the three components of the earth-magnetic field vector. Values for the magnitude and inclination of the field at the location of the device are given. If at least one of the body axes of the device is held horizontally in operational use, an educated guess can be made about the actual orientation of the device (e.g., heading and tilt angles) with respect to the earth. Accordingly, this compass is a very-low cost device.
摘要翻译： 电子罗盘具有用于确定地磁场矢量的三个分量中的两个的2D磁力计。 给出了设备位置的场的幅度和倾角值。 如果设备的至少一个身体轴线水平地保持在操作使用中，则可以对设备的实际取向（例如，航向和倾斜角度）相对于地球做出有根据的猜测。 因此，该罗盘是非常低成本的装置。
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公开(公告)号：US20080294581A1
公开(公告)日：2008-11-27
申请号：US11913590
申请日：2006-04-27
IPC分类号： G06N5/02
CPC分类号： G01C17/38
摘要： Devices (1) comprising sensor arrangements (2) for providing first field information defining at least parts of first fields and for providing second field information defining first parts of second fields are provided with estimators (4) for estimating second parts of the second fields as functions of mixtures of the first and second field information, to become more reliable and user friendly. The fields may be earth gravitational fields and/or earth magnetic fields and/or further fields. The mixtures comprise dot products of the first and second fields and/or first products of first components of the first and second fields in first directions and/or second products of second components of the first and second fields in second directions. The second parts of the second field comprise third components of the second field in third directions. The estimators (4) can further estimate third components of the first field in third directions as further functions of the first field information.
摘要翻译： 设置有用于提供定义第一场的至少一部分的第一场信息和用于提供定义第二场的第一部分的第二场信息的传感器装置（2），用于将第二场的第二部分估计为 第一和第二场信息的混合功能变得更加可靠和用户友好。 场可以是地球引力场和/或地球磁场和/或其它场。 混合物包括第一和第二场中的第一和第二场的第一和第二场的第一组分和/或第二方向上的第一和第二场的第二组分的第二组分的第一产物和/或第一组分的第一产物的第一产物。 第二场的第二部分包括在第三方向上的第二场的第三分量。 估计器（4）可以进一步估计第三方向的第一场的第三分量作为第一场信息的另外的功能。
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