A GPS drift data filtering method, system and terminal

A filtering method and filtering system technology, applied in the field of GPS positioning, can solve problems such as inaccurate filtering and achieve accurate positioning data

Active Publication Date: 2021-12-07
XIAMEN YAXON NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This filtering method is highly subjective, resulting in imprecise filtering

Method used

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  • A GPS drift data filtering method, system and terminal
  • A GPS drift data filtering method, system and terminal

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Embodiment

[0038] Please refer to figure 1 and figure 2 , the embodiment of the present invention is: as figure 1 Shown, a kind of GPS drift data filtering method comprises the following content:

[0039] Obtain GPS positioning data, search for WIFI hotspots and save them. Acquire the GPS positioning data of the moving object at regular intervals. In order to make the positioning data more accurate, the GPS data can be acquired once every second. Similarly, search for WIFI hotspots near the mobile body at regular intervals. The time interval for searching WIFI hotspots is the same as the time interval for obtaining GPS positioning data. After searching for WIFI hotspots, store them accordingly.

[0040] Judgment is made on the distance between the two positioning data obtained at the current moment and at the last moment. If the distance between the two positioning data is less than a preset value A, the current positioning data is valid data; if the distance between the two positio...

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Abstract

The invention discloses a GPS drift data filtering method, system and terminal, comprising: acquiring GPS positioning data, searching for WIFI hotspots and saving them; and correcting the positioning data according to the changes of the acquired WIFI hotspots. Using WIFI hotspots to correct GPS data, when the user carries a GPS filter terminal and moves in an environment with WIFI signals, it can filter short-distance GPS drift data to make the positioning data more accurate.

Description

technical field [0001] The invention relates to the technical field of GPS positioning, in particular to a GPS drift data filtering method, system and terminal. Background technique [0002] GPS drift means that when the mobile body is positioned by GPS, there is a large gap with the actual position, and there is a continuous trajectory with a certain distance from the actual route during the movement. At present, the general method of GPS drift data filtering is: according to the principle of European geometry, the distance between two points of the moving object within a certain time interval is obtained, and then the possible distance range of an actual moving object within a certain period of time is used as the standard. If it exceeds this range, the data will be automatically filter. This filtering method is highly subjective, resulting in imprecise filtering. Contents of the invention [0003] The technical problem to be solved by the present invention is to provi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/40H04W24/08
CPCG01S19/40H04W24/08
Inventor 韩震华许水燕解玉芳张屿
Owner XIAMEN YAXON NETWORKS CO LTD
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