Appratus and method for judgment 3 dimension

Abstract

The invention discloses a 3-D positioning apparatus and a method. The 3-D positioning apparatus comprises the components as following: an electric map storage portion, which stores 2-D position information and height information with multiple interpolating points; a map matching portion, which chooses at least one alternate path; a height detection portion, which calculates vehicle heights relative to multiple interpolating points; an error correction portion, which calculates the height of at least one alternate path; and a 3-D matching portion, which determines whether the vehicle height difference is less than a critical error, and the alternate path is chosen from the at least one alternate path with error less than the critical error for map match to the present position. The map matching precision on viaducts, underground roads, car parks and other roads having height difference with a flat road, the road is more accurately introduced, and much convenience is provided for a driver.

Description

technical field [0001] The invention relates to three-dimensional map matching, in particular to a three-dimensional locator and method capable of improving the accuracy of three-dimensional terrain matching. Background technique [0002] Navigators generally use GPS, vehicle speed and gyroscope sensors to grasp the current position of the vehicle, and provide the driver with the current position of the vehicle and map data. [0003] GPS signals are generally divided into SPS (Standard Positioning System) for civil purposes and PPS (Precise Positioning System) for military purposes. However, the navigator uses SPS with an error range within 200m, and corrects the SPS error through "map matching". [0004] With conventional navigators, if the vehicle's position calculated from the GPS signal is not the road, the vehicle's position is corrected to the road by "map matching" that takes into account factors such as the vehicle's previous position or moving speed. [0005] Howe...

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, the traditional navigator cannot accurately derive the current position of the vehicle if the vehicle is near an elevated road, underground road, construction parking lot, or underground parking lot during "map matching"

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