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Vehicle location accuracy

A vehicle and satellite positioning technology, applied in vehicle position/route/altitude control, satellite radio beacon positioning system, position/direction control and other directions, which can solve the problem of lack of GPS signal, inability to accurately determine position, and insufficient navigation system. Problems such as locating the GPS signal of the vehicle

Active Publication Date: 2016-10-05
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In very dense urban areas or in buildings such as parking lots, vehicles equipped with GPS or Assisted GPS may not be able to accurately determine their position due to lack of GPS signal
For example, a driver may drive out of a parking space in a parking lot, but be unsure whether to turn left or right
However, when the driver looks at the vehicle's navigation system for directions, the navigation system may receive insufficient GPS signals to locate the vehicle

Method used

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  • Vehicle location accuracy
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Embodiment Construction

[0027] As required, detailed embodiments of the invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0028] Vehicle navigation systems may rely on GPS or GPS data to identify the vehicle's current location. However, when GPS data is unavailable or very inaccurate, the vehicle can use various types of non-GPS sensor input to track the vehicle.

[0029] For example, on-board compass signals can be used for vehicle localization and vehicle direction approximation. In this approach, the curren...

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Abstract

A controller may maintain a last-known vehicle location, and, when satellite-positioning data is unavailable from a satellite-based positioning-system module, utilize compass data and stability control data to estimate a current vehicle location from the last-known vehicle location. The controller may avoid use of the compass data to estimate the current vehicle location when the vehicle is accelerating or decelerating in East or West headings.

Description

technical field [0001] Aspects of the present disclosure relate to improving vehicle location accuracy in weak signal conditions for satellite-based positioning system (eg, GPS) / assisted GPS (as a type of GPS) reception. Background technique [0002] Motor vehicles are typically equipped with a plurality of sensing devices for sensing dynamic motion of the vehicle and generating output signals indicative of the sensed motion. The sensed vehicle dynamic output signals can generally be used by various on-board control systems to further enhance vehicle drivability. Advanced vehicle dynamic control systems (including active suspension control systems, traction control systems, and brake control systems) typically utilize sensed vehicle dynamic information such as roll angle, pitch angle, yaw rate, roll rate, pitch speed, lateral and longitudinal velocity, lateral and longitudinal acceleration, tire slip, tire slip rate, and other vehicle parameters sensed). Considering the va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/48
CPCG01S19/48G01S19/49B60W30/02G01S19/24G05D1/00G05D3/00
Inventor 克里斯托弗·詹姆斯·霍金肯尼思·詹姆士·米勒道格拉斯·雷蒙德·马丁威廉·保罗·伯金斯托马斯·G·里昂
Owner FORD GLOBAL TECH LLC