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1. 发明授权

US5390122A Method and apparatus for calibrating a vehicle compass system 失效
标题翻译：用于校准车辆指南针系统的方法和装置
公开(公告)号：US5390122A
公开(公告)日：1995-02-14
申请号：US058956
申请日：1993-05-07
申请人： Paul A. Michaels , Joseph F. Supinsky , Robert F. Spitz
发明人： Paul A. Michaels , Joseph F. Supinsky , Robert F. Spitz
IPC分类号： G01C17/30 , G01C17/38 , G01C25/00
CPC分类号： G01C17/38 , G01C17/30
摘要： A vehicle compass system that is adapted to be calibrated in the assembly plant during final assembly of the vehicle. In particular, two factory calibration modes are disclosed: an automatic factory calibration mode wherein the calibration sequence is automatically initiated upon the occurrence of a uniquely definable event on the assembly line, and a manual factor calibration mode wherein a calibration button sequence is actuated at a specified location on the assembly line. In addition, an automatic adaptive calibration process is disclosed which continuously updates the calibration constants each time valid new heading data is obtained. In particular, heading vectors for the four main N, S, E, and W heading directions are calculated and stored in memory when the system is initially calibrated. Thereafter, whenever new heading direction data is obtained, the value of the new heading vector is used to update the value of the closest of the four main heading vectors. A new center calculation is also performed using the updated values and if the result is outside a tolerance window, the calibration constants are changed accordingly.
摘要翻译：车辆罗盘系统，其适于在车辆的最终组装期间在组装工厂中校准。特别地，公开了两种工厂校准模式：自动工厂校准模式，其中校准序列在装配线上发生唯一可定义事件时自动启动，以及手动因子校准模式，其中校准按钮序列在装配线上的指定位置。此外，公开了一种自动自适应校准过程，其在每次获得有效的新航向数据时不断地更新校准常数。特别地，当系统初始校准时，计算四个主要N，S，E和W方向的航向向量并将其存储在存储器中。此后，当获得新的航向方向数据时，使用新的航向向量的值来更新四个主航向矢量中最接近的值。还使用更新的值执行新的中心计算，并且如果结果在公差窗口之外，则相应地改变校准常数。

2. 发明授权

US06356851B1 Accelerated calibration for electronic compass module 有权
标题翻译：电子罗盘模块加速校准
公开(公告)号：US06356851B1
公开(公告)日：2002-03-12
申请号：US09245260
申请日：1999-02-05
申请人： Kevin I. Young , Joseph F. Supinsky , Paul A. Michaels
发明人： Kevin I. Young , Joseph F. Supinsky , Paul A. Michaels
IPC分类号： G01C1738
CPC分类号： G01C17/38
摘要： A system for calibrating an electronic compass for a vehicle of the type employing a Forward and Lateral magnetoresistive magnetic field sensor. As the vehicle changes headings, the system periodically samples and digitally stores the peaks of the sensor outputs. When the stored peaks indicate a minimum change in the output of the sensors, the system microcomputer calculates a “box” surrounding the subscribed arc of heading changes and computes the center of the “box” as the center of the locus of anticipated peaks for all quadrants and shifts the locus (i.e., “box”) to be within the domain of the A/D converter to prevent saturation, which could otherwise occur in the presence of strong remnant magnetic fields in the vehicle. The “box” is updated with each sampling of sensor outputs until the vehicle is eventually headed through all four cardinal compass headings, and the compass is then considered to be fully modeled in the microcomputer.
摘要翻译：一种用于校准用于使用前向和横向磁阻磁场传感器的类型的车辆的电子罗盘的系统。当车辆改变航向时，系统周期性地采样和数字存储传感器输出的峰值。当存储的峰值表示传感器的输出的最小变化时，系统微计算机计算围绕订阅的标题变化弧的“盒”，并将“盒”的中心计算为所有的预期峰值的轨迹的中心象限，并将轨迹（即“盒”）移动到A / D转换器的域内以防止饱和，否则在车辆中存在强残余磁场的情况下可能会出现这种情况。传感器输出的每个采样的“盒”都被更新，直到车辆最终朝向所有四个基本的罗盘标题，然后认为罗盘在微型计算机中被完全建模。

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