公开(公告)号：US20120173142A1

公开(公告)日：2012-07-05

申请号：US13309520

申请日：2011-12-01

申请人： Joseph CZOMPO ,  Guttorm Ringstad OPSHAUG ,  Kumar Gaurav CHHOKRA ,  Zoltan Fenene BIACS ,  Wyatt T. RILEY

发明人： Joseph CZOMPO ,  Guttorm Ringstad OPSHAUG ,  Kumar Gaurav CHHOKRA ,  Zoltan Fenene BIACS ,  Wyatt T. RILEY

IPC分类号： G01C21/10

CPC分类号： G01C21/165 ,  G01C21/26 ,  G01C25/005

摘要： An apparatus and method for providing an improved heading estimate of a mobile device in a vehicle is presented. First, the mobile device determines if it is mounted in a cradle attached to the vehicle; if so, inertia sensor data may be valid. While in a mounted stated, the mobile device determines whether it has been rotated in the cradle; if so, inertia sensor data may no longer be reliable and a recalibration to determine a new relative orientation between the vehicle and the mobile device is needed. If the mobile device is mounted and not recently rotated, heading data from multiple sensors (e.g., GPS, gyroscope, accelerometer) may be computed and combined to form the improved heading estimate. This improved heading estimate may be used to form an improved velocity estimate. The improved heading estimate may also be used to compute a bias to correct a gyroscope.

摘要翻译： 提出了一种用于提供车辆中移动设备的改进的航向估计的装置和方法。 首先，移动设备确定其是否安装在连接到车辆的支架上; 如果是这样，惯性传感器数据可能是有效的。 在安装状态下，移动设备确定是否已经在摇篮中旋转; 如果是这样，惯性传感器数据可能不再可靠，并且需要重新校准以确定车辆和移动设备之间的新的相对定向。 如果移动设备被安装并且最近没有旋转，则可以计算并组合来自多个传感器（例如，GPS，陀螺仪，加速度计）的航向数据以形成改进的航向估计。 该改进的航向估计可用于形成改进的速度估计。 改进的航向估计也可用于计算偏差以校正陀螺仪。