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1. 发明授权

US06192315B1 Dual-calibrated compass 失效
标题翻译：双重校准罗盘
公开(公告)号：US06192315B1
公开(公告)日：2001-02-20
申请号：US08884454
申请日：1997-06-27
申请人： James R. Geschke , Thomas R. Olson , Mark Michmerhuizen , Gregory B. Colon
发明人： James R. Geschke , Thomas R. Olson , Mark Michmerhuizen , Gregory B. Colon
IPC分类号： G05D100
CPC分类号： G01C17/38
摘要： An electronic compass system of the present invention includes a sensor for detecting the earth's magnetic field and for providing electrical signals representing the direction of the vehicle, a heading indicator for indicating vehicle headings in response to received vehicle heading signals, and a processor coupled to the sensor for receiving the electrical signals and coupled to the heading indicator for supplying the vehicle heading signals to the heading indicator. The processor preferably includes a first compass controller for calculating vehicle headings in response to the received electrical signals using precalibration data to compensate for expected vehicular magnetism, a second compass controller for calculating vehicle headings in response to the received electrical signals using an automatic calibration routine to compensate for actual vehicular magnetism, and a control transferring mechanism for initially selecting the vehicle headings calculated by the first compass controller to be represented by the vehicle heading signal supplied to the heading indicator, and for selecting the vehicle headings calculated by the second compass controller after the automatic calibration routine has acquired sufficient data from the magnetic field sensor to calibrate the compass system. The heading indicator may include a display and/or an audio messaging device for generating audible vehicle heading messages. If such an audible messaging device is employed, the device may also be used to record and playback dictated memos.
摘要翻译：本发明的电子罗盘系统包括用于检测地球磁场并提供表示车辆方向的电信号的传感器，用于响应于接收的车辆航向信号指示车辆航向的航向指示器，以及耦合到传感器，用于接收电信号并耦合到航向指示器，以将车辆航向信号提供给航向指示器。处理器优选地包括第一罗盘控制器，用于响应于所接收的电信号，使用预校准数据来计算车辆航向，以补偿预期的车辆磁性;第二罗盘控制器，用于响应于所接收的电信号使用自动校准程序来计算车辆航向，补偿实际的车辆磁性，以及控制转移机构，用于最初选择由第一罗盘控制器计算的车辆标题，以由提供给航向指示符的车辆航向信号表示，并且用于选择由第二罗盘控制器计算的车辆航向，之后自动校准程序从磁场传感器获取了足够的数据来校准罗盘系统。航向指示器可以包括用于生成可听见车辆航向消息的显示器和/或音频消息收发设备。如果采用这样的可听消息传送设备，则该设备也可用于记录和播放指定的备忘录。

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