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1. 发明授权

US5297063A Method for selecting calibration data for an auto-calibrating compass 失效
标题翻译：选择自动校准罗盘的校准数据的方法
公开(公告)号：US5297063A
公开(公告)日：1994-03-22
申请号：US815264
申请日：1991-12-27
申请人： Russell E. Cage
发明人： Russell E. Cage
IPC分类号： G01C17/38 , G01D3/02 , G01D18/00 , G01C25/00
CPC分类号： G01D3/02 , G01C17/38 , G01D18/004
摘要： A method for selecting calibration data which uses mean square error to minimize variations in the calculated origins of the earth's magnetic field vector. A microcomputer having a memory calculates and stores the origin of the earth's magnetic field vector from the last three headings or data points. The x and y coordinates of the origins are summed with all the previous x and y coordinates and the mean square errors of the x and y coordinates are calculated. A figure of merit for the mean square errors is calculated. An adjusted origin is determined and stored by weighing the newly calculated origin by a figure of merit and adding it to the previous origin. Provision is made for reinitializing all quantities to zero when the sum of the mean square errors exceeds a predetermined maximum.
摘要翻译：一种选择校正数据的方法，该校正数据使用均方误差来最小化地球磁场矢量的计算起源的变化。具有存储器的微计算机计算并存储来自最后三个标题或数据点的地球磁场矢量的原点。原点的x和y坐标与所有先前的x和y坐标相加，并计算x和y坐标的均方误差。计算均方误差的品质因数。通过将新计算的来源称量一个品质因数并将其添加到以前的来源来确定和存储调整的来源。当均方误差的总和超过预定的最大值时，将所有数量重新初始化为零。

2. 发明授权

US5828984A Data processing method for an electronic compass system 失效
标题翻译：电子罗盘系统的数据处理方法
公开(公告)号：US5828984A
公开(公告)日：1998-10-27
申请号：US131014
申请日：1993-10-01
申请人： Russell E. Cage , Rafi A. Al-Attar
发明人： Russell E. Cage , Rafi A. Al-Attar
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： A method for converting distorted compass data values into corrected data values which employs linear transforms. A linear transform is formulated and programmed into the read only memory of the microcomputer of the electronic compass system. The microcomputer uses the linear transform to transform compass data readings distorted by ferrous metals in the environment of the vehicle into corrected data readings and then uses the corrected data readings to compute headings.
摘要翻译：将失真的罗盘数据值转换为采用线性变换的校正数据值的方法。线性变换被制定并编程到电子罗盘系统的微型计算机的只读存储器中。微型计算机使用线性变换将在车辆环境中的黑色金属扭曲的罗盘数据读数转换为校正数据读数，然后使用校正的数据读数来计算标题。

3. 发明授权

US5323336A Noise removal method for an electronic compass 失效
标题翻译：电子罗盘的噪声去除方法
公开(公告)号：US5323336A
公开(公告)日：1994-06-21
申请号：US815269
申请日：1991-12-27
申请人： Russell E. Cage
发明人： Russell E. Cage
IPC分类号： G01C17/30 , G01C17/38 , G01B7/00
CPC分类号： G01C17/38 , G01C17/30
摘要： A method for removing noise from data in an electronic compass system which discounts noise values or outliers (extreme headings far from average) by displaying median headings in the absence of a clear trend in the direction of change of sampled headings. If a clear trend is detected, extreme headings are displayed. Compass jitter is reduced by requiring two consecutive differences be on the same side of the displayed heading before the displayed heading is changed.
摘要翻译：通过在采样标题的变化方向上没有清晰趋势的情况下显示中值标题，从电子罗盘系统中的数据中消除噪声的方法，该数字折扣噪声值或异常值（极端标题远离平均值）。如果检测到清晰的趋势，则显示极端标题。在显示的标题更改之前，需要在显示标题的同一侧要求两个连续的差异来减少指南针抖动。

4. 发明授权

US5297065A Magnetic transient detection and calibration technique for an auto-calibrating compass 失效
标题翻译：用于自动校准罗盘的磁性瞬态检测和校准技术
公开(公告)号：US5297065A
公开(公告)日：1994-03-22
申请号：US815268
申请日：1991-12-27
申请人： Russell E. Cage , John A. Wilke , Rafi A. Al-Attar
发明人： Russell E. Cage , John A. Wilke , Rafi A. Al-Attar
IPC分类号： G01C17/38 , G01D3/02 , G01D18/00 , G01C25/00
CPC分类号： G01D3/02 , G01C17/38 , G01D18/004
摘要： A magnetic transient detection technique which alerts a microcomputer of an auto-calibrating compass when electrical transients which produce magnetic transients have occurred. The technique employs an electronic compass control circuit having a sampling rate high enough to isolate electrical transients from transients produced by normal motion of the vehicle. Accelerations in data values defined as the difference between two changes in the coordinates for the center of the earth's magnetic field circle, are calculated and compared to predetermined threshold accelerations. Previous acceleration values and their associated vehicle magnetic field vectors can be stored in the microcomputer. After a magnetic transient is detected, its associated vehicle magnetic field vector is subtracted from the resultant magnetic field to yield vehicle heading. Once detected, magnetic transients are also used to initiate auto-calibration.
摘要翻译：一种磁瞬变检测技术，当发生产生磁瞬变的瞬变时，可以向微型计算机通知自动校准罗盘。该技术采用电子罗盘控制电路，该电子罗盘控制电路具有足够高的采样率，以将电瞬态与车辆正常运动产生的瞬变隔离开来。计算定义为地球磁场中心坐标的两个变化之间差异的数据值的加速度，并将其与预定阈值加速度进行比较。先前的加速度值及其相关联的车辆磁场矢量可以存储在微型计算机中。在检测到磁暂态后，从所得磁场中减去其相关联的车辆磁场矢量，以产生车辆行驶。一旦检测到，磁瞬变也用于启动自动校准。

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