Method and apparatus of filtering GPS position drift points

A position point and drift point technology, applied in the field of GPS positioning monitoring, can solve problems such as difficulty, and achieve the effect of simple and reliable judgment basis and simple and efficient calculation method

Active Publication Date: 2017-01-11
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the difficulty in filtering GPS position drift points in the prior art

Method used

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  • Method and apparatus of filtering GPS position drift points
  • Method and apparatus of filtering GPS position drift points
  • Method and apparatus of filtering GPS position drift points

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Experimental program
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Embodiment 1

[0056] figure 1 It is a flowchart of the steps of the method for filtering GPS position drift points in this embodiment. exist figure 1 In this method, the position data and positioning time of the GPS terminal at the position point are first extracted (step S110), and then the driving speed of the GPS terminal is calculated according to the position data and positioning time of the adjacent position point (step S120), and then the GPS terminal is in the adjacent position. Acceleration is calculated based on the travel speed of the location point and the positioning time (step S130).

[0057] For the convenience of processing, in step S110, for the position points of a certain GPS terminal stored in the server, according to the order of the positioning time of the position points, the position data and positioning time of the GPS terminal position points are respectively sorted to obtain the position data sequence G 1 , G 2 , G 3 ...... G n and locate the time series T ...

Embodiment 2

[0079] Figure 4 A schematic structural diagram of a device for filtering GPS position drift points provided in this embodiment. The device mainly includes a data extraction module 410 , a speed calculation module 420 , an acceleration calculation module 430 , and a first judging module 440 and a second judging module 450 .

[0080] Wherein, the data extraction module 410 is configured to extract the position data and positioning time of the GPS terminal at the position point. Preferably, the data extraction module 410 sorts the position data and the positioning time of the GPS terminal position points respectively according to the order of the positioning time of the position points to obtain G 1 , G 2 , G 3 ...... G n and locate the time series T 1 , T 2 , T 3 ...T n .

[0081] The speed calculation module 420 is connected to the data extraction module 410, and the speed calculation module 420 is configured to calculate the driving speed of the GPS terminal accordin...

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Abstract

The invention discloses a method and an apparatus of filtering GPS position drift points. The method comprises steps of extracting position data and positioning time of a GPS terminal at a position point; calculating the moving speed of the GPS terminal according to position data and positioning time of adjacent position points; calculating acceleration according to the moving speed and the positioning time of the GPS terminal at the adjacent position points; and determining a GPS position drift point according to the numerical relationship between the moving speed of the GPS terminal and a preset speed threshold, or determining a GPS position drift point according to the numerical relationship between the acceleration of the GPS terminal and a preset acceleration threshold. The invention determines the position drift point according to position data uploaded by the GPS terminal, and filters position points where the moving speed exceeds the threshold and the positive acceleration exceeds the threshold. The calculation method is simple and effective.

Description

technical field [0001] The invention relates to the technical field of GPS positioning monitoring, in particular to a method and device for filtering GPS position drift points. Background technique [0002] The currently widely used GPS positioning monitoring system uses GPS terminals to collect real-time location information and upload it to the monitoring center, and the monitoring center processes the track data reported by the GPS terminals. [0003] Because GPS satellite signals are affected by complex factors such as changes in the atmospheric ionosphere, cloud cover, and multipath reflections from tall buildings, GPS positioning often occurs position drift, that is, the position information calculated by the GPS receiver is different from the actual situation. different degrees of deviation. When the deviation exceeds the allowable range of accuracy error, it is considered that GPS position drift has occurred. Some GPS locations even drift a large distance, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
Inventor 邝井国于立志
Owner HANGZHOU HIKVISION DIGITAL TECH
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