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公开(公告)号：US5737226A
公开(公告)日：1998-04-07
申请号：US462468
申请日：1995-06-05
CPC分类号： G01C17/38
摘要： An electrical system providing automatic calibration of a vehicle compass for abrupt and significant changes in vehicle magnetism. The system includes a magnetic field sensor providing signal information representing the magnetic field sensed within the vehicle. Coupled to the sensor is an electrical circuit for processing the signal information from the sensor to determine if a shift in vehicle magnetism has occurred and for calculating compensation signal information to provide a corrected heading display.
摘要翻译： 一种提供车辆罗盘的自动校准的电气系统，用于车辆磁性的突然和显着变化。 该系统包括提供表示在车辆内感测的磁场的信号信息的磁场传感器。 耦合到传感器的是用于处理来自传感器的信号信息以确定车辆磁性是否发生变化并用于计算补偿信号信息以提供校正行程显示的电路。
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公开(公告)号：US07191533B2
公开(公告)日：2007-03-20
申请号：US11511795
申请日：2006-08-29
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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公开(公告)号：US07458166B2
公开(公告)日：2008-12-02
申请号：US12022039
申请日：2008-01-29
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）。
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公开(公告)号：US07127823B2
公开(公告)日：2006-10-31
申请号：US11271358
申请日：2005-11-10
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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公开(公告)号：US07353614B2
公开(公告)日：2008-04-08
申请号：US11709602
申请日：2007-02-22
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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公开(公告)号：US06964108B2
公开(公告)日：2005-11-15
申请号：US11001532
申请日：2004-12-01
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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公开(公告)号：US06857194B2
公开(公告)日：2005-02-22
申请号：US10663954
申请日：2003-09-16
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）。
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公开(公告)号：US06643941B2
公开(公告)日：2003-11-11
申请号：US09912273
申请日：2001-07-24
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。
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公开(公告)号：US06301794B1
公开(公告)日：2001-10-16
申请号：US09320924
申请日：1999-05-27
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）。
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