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    • 4. 发明申请
    • METHODS AND SYSTEMS FOR MAKING A GPS SIGNAL VITAL
    • 制造GPS信号灯的方法和系统
    • WO2009020777A1
    • 2009-02-12
    • PCT/US2008/071125
    • 2008-07-25
    • Quantum Engineering, Inc.KANE, MarkHICKENLOOPER, Harrison Thomas
    • KANE, MarkHICKENLOOPER, Harrison Thomas
    • B61L29/00G01S1/00
    • B61L25/025B61L2205/04G01S19/41
    • Position reports from GPS receivers can be made vital through a variety of techniques including relative differential GPS corrections and a technique in which a train traveling on a fixed path is provided with a database that includes positions on fixed paths or data from which positions on fixed paths can be determined. Position reports from GPS receivers located on the vehicle are compared to the positions of the fixed paths in the database. If the distance from the position reported by the GPS receiver to the nearest point on the nearest fixed path is greater than the stated accuracy of the GPS receiver, the position report is discarded or other corrective action is taken. A second technique involves cross-checking position reports from two GPS receivers separated by a known distance, preferably mounted on a single vehicle. Still other techniques may be used.
    • 来自GPS接收机的定位报告可以通过各种技术,包括相对差分GPS校正以及在固定路径上行进的列车设置有包括固定路径上的位置或固定路径上的位置的数据的技术而变得至关重要 可以确定。 将位于车辆上的GPS接收机的定位报告与数据库中固定路径的位置进行比较。 如果从GPS接收机报告的位置到最近的固定路径上最近点的距离大于GPS接收机的规定精度,则丢弃位置报告或采取其他纠正措施。 第二种技术涉及交叉检查来自两个GPS接收器的位置报告,所述两个GPS接收器以已知距离分开,优选地安装在单个车辆上。 还可以使用其它技术。