Automobile navigation system height information identification detection method

Abstract

The invention discloses an automobile navigation system height information identification detection method which includes the steps: firstly, acquiring contour map data, viaduct position and height information data and mobile communication base station position and height information data, and storing the acquired data into a mobile phone database; secondly, transmitting current position coordinates and transmitting moment data to a mobile communication base station after the current position coordinates of an automobile are acquired by a mobile phone satellite navigation system through a GPS(global position system); thirdly, returning horizontal position coordinates and height coordinates of the mobile communication base station and returning moment to a mobile phone when the position coordinates and the transmitting moment data are received by the mobile communication base station; fourthly, calculating height of a mobile communication base station signal receiving point and horizontal distance between the automobile and the mobile communication base station signal receiving point by a mobile phone data processing unit; fifthly, comparing mobile phone processor time data and a preset threshold value, judging whether the mobile phone processor time data are right or not, repeating the second step to the fourth step if not, and rightly planning route navigation. The method hasthe advantages of rapidness and accuracy in navigation.

Description

technical field [0001] The invention relates to a vehicle-mounted satellite navigation system, in particular to a method for identifying and detecting height information of a vehicle navigation system. Background technique [0002] At present, the car navigation system generally includes the following modules: car position detection module, path planning module, error compensation module and intelligent voice reminder module. The car position detection module is the basic module of the car navigation system. During the driving process of the car, whether the accurate navigation of the driving route can be realized directly affects whether the car can reach the destination accurately. [0003] Existing vehicle location detection technology is mainly based on vehicle GPS to locate and obtain vehicle location information, but the disadvantage is that the obtained vehicle location information has a large deviation in height positioning, and it is impossible to identify whether t...

AI Technical Summary

Problems solved by technology

[0003] Existing vehicle location detection technology is mainly based on vehicle GPS to locate and obtain vehicle location information, but the disadvantage is that the obtained vehicle location information has a large deviation in height positioning, and it is impossible to identify whether the vehicle is on the viaduct, making navigation Route planning error, unable to navigate accurately

The reason is: when the car is driving on two intersecting viaducts, or driving on the road below the viaduct, because the height difference between the intersecting viaducts or the viaduct and the road below is ≥ 3m, the car navigation system cannot recognize it at this time. If the car is driving on the viaduct, or cannot identify whether it is driving on the viaduct or the road below the viaduct, this will cause misjudgment by the car navigation system, resulting in errors in the given navigation route and inaccurate navigation

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