Unlock instant, AI-driven research and patent intelligence for your innovation.

Indoor positioning method based on wsn

An indoor positioning and inner area technology, applied in the directions of nan, electrical components, network topology, etc., can solve the problems of random fluctuation of received RSSI, reduced positioning accuracy, inability to communicate RSSI, etc., to avoid environmental uncertainty and jitter phenomenon, improve The effect of positioning accuracy

Active Publication Date: 2016-12-21
SHANGHAI AVCON INFORMATION TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a WSN-based indoor positioning method, which is used to solve the problem of receiving RSSI random fluctuations caused by node hardware and related environmental factors and node data link in the prior art. The lack of communication or the abnormality of the measured RSSI due to reasons such as roads and obstacles, resulting in a serious reduction in positioning accuracy

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
  • Indoor positioning method based on wsn
  • Indoor positioning method based on wsn
  • Indoor positioning method based on wsn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a WSN-based indoor positioning method, such as figure 1 As shown, the WSN-based indoor positioning method includes offline fingerprint collection and online positioning.

[0027] The off-line fingerprint collection includes:

[0028]Firstly, anchor nodes that meet the communication requirements of WSN are arranged in the indoor area to be located, so that the signal of the anchor node can be received at any position in the indoor area, and the indoor WSN network topology and route construction are completed. Specifically, arrange n WSN anchor nodes for the environment to be positioned (that is, the indoor area to be positioned), to ensure that the environment to be positioned is covered by WSN signals, and to ensure that any test point in the environment to be positioned can receive the anchor The number of nodes is at least 3. The WSN communication requirement is: the anchor node self-organizes to form a wireless sensor network in the indoor ...

Embodiment 2

[0077] This embodiment provides a WSN-based indoor positioning method, such as image 3 As shown, the difference between it and Embodiment 1 is that in step 2, after Kalman filtering is performed on the fingerprint, the similarity detection process is performed first, then the boundary detection process is performed, and finally the dimensionality reduction process is performed, that is, this embodiment and the implementation The difference of Example 1 is only that the sequence of processing methods adopted in the filtering process is different, and the principle is the same.

[0078] Wherein, the similarity detection processing described in this embodiment is: performing similarity detection processing on the optimal estimate of the n-dimensional RSSI observation vector after the Kalman filter processing, and the specific process is: for the similarity degree greater than or equal to the fixed threshold δ The RSSI observation component is discarded. Then perform boundary de...

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 present invention provides a WSN-based indoor positioning method, including: offline fingerprint collection: arranging anchor nodes that meet the WSN communication requirements in the indoor area to be positioned to complete the construction of the indoor WSN network; dividing the indoor area into multiple sub-areas. Set test points in the sub-area and collect the fingerprints of the test points, and store the fingerprints in the database; online positioning: when the mobile node to be located enters the indoor area and walks, obtain the fingerprint of the mobile node at any time in the indoor area; The fingerprint of the mobile node at any time in the indoor area is filtered and dimensionally reduced and compared with the fingerprint in the database to obtain the specific location of the mobile node in the indoor area. The invention solves the problem that the RSSI received by the mobile node fluctuates irregularly due to node hardware factors and related environmental factors, and the problem that the RSSI cannot be measured or the measured RSSI has a great deviation due to obstacles, and improves Positioning accuracy and positioning anti-interference ability.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a positioning method, in particular to a WSN-based indoor positioning method. Background technique [0002] As a new generation of sensor network, wireless sensor network (WSN) has a wide range of applications in medical care, military fields, and environmental monitoring and protection, and has brought a profound impact on various fields of human production and life. All applications are completed through information collection, and the collected data is meaningful only when the location of the perceived object can be determined. For example, in the application of disaster monitoring in the wild, rescuers can only carry out their work if they know the exact location of the disaster. For some sensor network protocols, location information is also one of the necessary factors, such as routing protocols based on geographical location, it is necessary to select the rou...

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): H04W4/04H04W64/00H04W84/18
Inventor 陈宇斌冯利爽胡红林徐海平熊文黄宇段志亮
Owner SHANGHAI AVCON INFORMATION TECH