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1. 发明授权

US07127823B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US07127823B2
公开(公告)日：2006-10-31
申请号：US11271358
申请日：2005-11-10
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当获得定义满足该标准的三角形的三个数据点时，处理电路通过求解方程式来计算所有三个数据点所在的圆的中心点，对于A，B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

2. 发明授权

US07458166B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US07458166B2
公开(公告)日：2008-12-02
申请号：US12022039
申请日：2008-01-29
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration route in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准路线，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准罗盘。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当三个数据点被定义为满足该标准的三角形时，处理电路通过求解A的等式x2 + y2 + Ax + By + C = 0来计算所有三个数据点所在的圆的中心点， B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

3. 发明授权

US07353614B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US07353614B2
公开(公告)日：2008-04-08
申请号：US11709602
申请日：2007-02-22
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当获得定义满足该标准的三角形的三个数据点时，处理电路通过求解方程式来计算所有三个数据点所在的圆的中心点，对于A，B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

4. 发明授权

US06964108B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US06964108B2
公开(公告)日：2005-11-15
申请号：US11001532
申请日：2004-12-01
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当获得定义满足该标准的三角形的三个数据点时，处理电路通过求解方程式来计算所有三个数据点所在的圆的中心点，对于A，B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

5. 发明授权

US06857194B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US06857194B2
公开(公告)日：2005-02-22
申请号：US10663954
申请日：2003-09-16
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当获得三个满足该标准的三角数据点时，处理电路通过求解方程x 2 + y 2 + Ax + By +计算所有三个数据点所在的圆的中心点，对于A，B和C，C = 0，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

6. 发明授权

US06643941B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US06643941B2
公开(公告)日：2003-11-11
申请号：US09912273
申请日：2001-07-24
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C1738
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation 2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当获得三个满足该标准的三角数据点时，处理电路通过求解方程式2 + + 2 + Ax + By + C计算所有三个数据点所在的圆的中心点对于A，B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2），为0。

7. 发明授权

US06301794B1 Vehicle compass system with continuous automatic calibration 失效
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US06301794B1
公开(公告)日：2001-10-16
申请号：US09320924
申请日：1999-05-27
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C1738
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当三个数据点被定义为满足该标准的三角形时，处理电路通过求解A的等式x2 + y2 + Ax + By + C = 0来计算所有三个数据点所在的圆的中心点， B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

8. 发明授权

US07191533B2 Vehicle compass system with continuous automatic calibration 有权
标题翻译：车载指南针系统，连续自动校准
公开(公告)号：US07191533B2
公开(公告)日：2007-03-20
申请号：US11511795
申请日：2006-08-29
申请人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
发明人： Jeffrey N. Parks , Thomas R. Olson , David J. Slater
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One such criterion is that the three data points define corners of a triangle that is substantially non-obtuse. When three data points have been obtained that define a triangle meeting this criterion, the processing circuit calculates a center point for a circle upon which all three data points lie by solving the equation x2+y2+Ax+By+C=0 for A, B, and C, using the coordinate values (x,y) for the three data points and defining the center point as (−A/2, −B/2).
摘要翻译：本发明的罗盘系统利用改进的校准程序，其中每当从满足预定标准的磁场传感器获得三个数据点时，罗盘的处理电路重新校准指南针。一个这样的标准是三个数据点定义基本上不钝的三角形的角。当获得定义满足该标准的三角形的三个数据点时，处理电路通过求解方程式来计算所有三个数据点所在的圆的中心点，对于A，B和C，使用三个数据点的坐标值（x，y）并将中心点定义为（-A / 2，-B / 2）。

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