Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Method for Finding Indoor Trajectory Stay Area Based on Stability Value

A technology of staying area and discovery method, which is applied in the cross field of engineering application and information science, can solve the problem of not considering the problem of staying area, and achieve the effect of reducing the risk of track privacy leakage and protecting inviolability

Active Publication Date: 2020-11-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the existing research on trajectory staying, the problem of staying area is not considered

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method for Finding Indoor Trajectory Stay Area Based on Stability Value
  • A Method for Finding Indoor Trajectory Stay Area Based on Stability Value
  • A Method for Finding Indoor Trajectory Stay Area Based on Stability Value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The invention will be further described below in combination with the accompanying drawings.

[0026] The overall process of the invention is as follows: Figure 1 As shown in. Its sub module processes are as follows: Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown in the figure, the following will be described in detail in combination with each figure.

[0027] The invention records the position of sample points in the indoor track in the form of three-dimensional coordinates; According to the position of sample points in the track, calculate the length between them; Record the distance and time difference between the position points in the track, and calculate its stability value; The point whose stability value is less than the stability threshold is considered to be in a stable state and added to the candidate dwell point set; The remaining location points are discarded and continue to be identified in the next step; Expand each location point in the cand...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an indoor track stay area discovery method based on a stability value. The indoor track stay area discovery method comprises the following steps: recording the positions of sample points in an indoor track; Calculating the length of the position point distance; Calculating a stability value of the position point; Wherein the point with the stability value smaller than the stability threshold value is considered to be in a stable state, and adding the point into the candidate stay point set; Expanding each position point in the candidate set, giving a time threshold value, traversing all neighbor position points in the candidate set in the time threshold value range, and calculating a stability value between the neighbor position points; Repeating the above steps until the judgment of all neighbor position points is completed; Wherein the set formed by the stay points is the discovered stay area. The method has the advantages that the residence area is found based on the stability value, namely the distance and the time difference between the position points are comprehensively considered, and the influence of the two factors on the stability value is balanced. The method is suitable for discovering the residence area of the moving object track in the indoor environment, and has universality.

Description

technical field [0001] The invention relates to an indoor trajectory dwell area discovery method based on stability value, which is aimed at the dwell area discovery of moving object trajectory in indoor environment, and belongs to the cross field of engineering application and information science. Background technology [0002] With the popularity of a variety of mobile positioning devices, location-based services (LBS) have widely existed in daily life. According to the data provided by Nokia, people spend 87% to 90% of their time in indoor space. We all see the huge business opportunities brought by indoor positioning technology, and relevant companies all over the world are actively moving closer to the indoor location service industry. [0003] Dwell area is a set of significant position points in the trajectory of moving objects. It does not really mean that the moving object is at rest, but that the moving object moves in a small range at a low speed for a period of time. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/029H04W4/33
Inventor 皮德常陈怡
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com