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A method for judging vehicle navigation position offset

A determination method and vehicle navigation technology, applied in the field of car navigation, can solve the problems of detour, not very accurate, extending the total mileage and so on

Active Publication Date: 2019-05-17
浙江大仓信息科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current situation is that due to the algorithm, the judgment of the deviation of the vehicle from the preset route is not very accurate. Sometimes the navigation system can only find the deviation after the vehicle has been on the wrong road for a long time. At this time, re-presetting the route is likely to happen. Detour or greatly extend the total mileage

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0012] Embodiment: a method for judging vehicle navigation position offset mainly includes three steps.

[0013] Step A): Partition the map, and then set the GeoHash value for each partition. The partitioning rules follow the cross equal division method until the actual area mapped by the smallest block is not greater than 15M*15M. As for the actual area of ​​the actual minimum block, it needs to be determined according to the specific situation. Generally speaking, the smaller the actual area mapped by the minimum block, the more accurate the judgment of the whole system is, but the higher the performance requirements for the positioning data processing server. The GeoHash assignment is performed on the equally divided blocks while performing the cross equalization. The value is assigned every time the cross is equally divided. The assignment rule is that the new block first inherits the GeoHash value of the superior block, and then the new block is from left to right. In or...

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PUM

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Abstract

The invention discloses a method for judging vehicle navigation location deviation, and relates to the field of vehicle navigation. The method mainly includes three steps of creating map GeoHash value databases and GeoHash Hash indexes; judging matching between the ranges of location points and GeoHash values in the ranges of segments of traveled distances; judging the distances from the location points to matched segments so as to determine whether vehicles are deviated from preset routes or not. Compared with the prior art, the method has the advantages that a large quantity of positioning information of the vehicles during driving can be acquired in real time, and whether the vehicles are deviated from the preset routes or not can be quickly accurately and timely judged according to the positioning information.

Description

technical field [0001] The invention relates to the field of car navigation, in particular to a method for judging whether the vehicle deviates from a preset path by using a GPS system to acquire position information of a vehicle. Background technique [0002] Satellite navigation is a very common technology that is now used. It can provide navigation information such as longitude, latitude, altitude, speed, heading, and time on a global scale. Satellite navigation can easily guide drivers to their destinations. The core technology of navigation is positioning technology, and now the data is mainly obtained through the GPS system or the Beidou system. When navigating, the navigation system will automatically plan the route and monitor the movement of the vehicle at all times. Once the vehicle deviates from the route, most navigation systems will re-plan the route and start re-navigation. The current situation is that due to the algorithm, the judgment of the deviation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/34G01S19/33
CPCG01C21/3415G01S19/33
Inventor 曹超峰
Owner 浙江大仓信息科技股份有限公司
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