Bus GPS correction method based on abnormal point elimination and trajectory compression algorithm

A compression algorithm and abnormal point technology, applied in the field of GPS deviation correction in buses, can solve the problems of low accuracy and low reliability, and achieve the effect of accurate positioning reference

Active Publication Date: 2018-11-13
SHENZHEN EMPEROR TECH
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AI Technical Summary

Problems solved by technology

However, the error in the direction of the GPS track along the road has been unable to overcome the existing map algorithm, and it requires a real-time traffic vector map
Therefore, it has the characteristics of low precision and low reliability.

Method used

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  • Bus GPS correction method based on abnormal point elimination and trajectory compression algorithm
  • Bus GPS correction method based on abnormal point elimination and trajectory compression algorithm
  • Bus GPS correction method based on abnormal point elimination and trajectory compression algorithm

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0016] A kind of bus GPS deviation correction method based on abnormal point elimination and trajectory compression algorithm designed by the present invention, such as figure 1 As shown, the method is applied to the real-time correction of the GPS on the bus. In order to correct the drifting coordinate data of the real-time GPS, a large amount of GPS data of a specific shift is used to eliminate drift points, and then the simulated trajectory data is compressed to form the trajectory data of a specific shift, and then the trajectory is corrected based on the real-time GPS data. The detailed steps are as follows:

[0017] Step 1: Obtain the historical GPS data of the designated bus route;

[0018] Step 2: Applying the local outlier factor algorithm (LOF, Local Outlier Factor) to the historical GPS data of the designated bus route extracted to ...

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Abstract

The invention discloses a bus GPS correction method based on abnormal point elimination and a trajectory compression algorithm. The method comprises the following steps: step 1, acquiring historical GPS data of a specified bus route; step 2, performing filtration treatment on the acquired historical GPS data of the specified bus route by applying a local abnormal factor algorithm; step 3, simulating GPS trajectory data of the specified bus route; and step 4, based on the GPS coordinate point information of the specified bus route, performing trajectory correction on the real-time GPS data acquired from message-oriented middleware by utilizing the GPS trajectory data of the specified bus route, and taking the coordinate value of the midpoint of two coordinate points closest to the real-timeGPS point on the GPS trajectory of the specified bus route as a correction point of a bus GPS location drift point. The method provided by the invention can improve the accuracy of the GPS route point of a specific vehicle shift on a map location.

Description

technical field [0001] The invention relates to the technical field of GPS (Global Positioning System, Global Positioning System) rectification on a bus, and specifically refers to a method for rectifying a GPS deviation of a bus based on an abnormal point elimination and a track compression algorithm. technical background [0002] At present, GPS technology is widely used in bus navigation, but due to certain errors in GPS system, its accuracy and stability have always been the focus of research. Due to the low price and easy deployment and installation of independent GPS navigation systems, independent vehicle navigation systems are currently the mainstream of civilian vehicle navigation systems, but there are certain errors in the positioning process. To meet the user's requirements for accuracy and real-time performance, the most basic step is to improve the positioning accuracy of the navigation and positioning system, which includes two aspects: the accuracy of the GPS...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/40G08G1/01
CPCG01S19/40G08G1/0112G08G1/0129G08G1/0137
Inventor 何利民吴鹏巴瑞花
Owner SHENZHEN EMPEROR TECH
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