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A method and device for updating fingerprint database based on historical data and increments

A technology of historical data and fingerprint database, applied in the field of indoor pedestrian positioning, can solve the problems of time-consuming and labor-intensive

Active Publication Date: 2020-09-22
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for updating a fingerprint library based on historical data and increments, to solve or at least partially solve the technical problem of time-consuming and labor-intensive updating methods of the fingerprint library in the prior art

Method used

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  • A method and device for updating fingerprint database based on historical data and increments
  • A method and device for updating fingerprint database based on historical data and increments
  • A method and device for updating fingerprint database based on historical data and increments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077]This embodiment provides an update method based on historical data and incremental fingerprint library, please refer to figure 1 , the method includes:

[0078] Step S1: Obtain historical WiFi fingerprint data, synthesize the historical WiFi fingerprint data into a first WiFi fingerprint sequence, and extract temporal features, spatial features and RSS features in the first WiFi fingerprint sequence.

[0079] Specifically, historical WiFi fingerprint data can be obtained in an active or passive manner.

[0080] Among them, see figure 2 , is a flowchart for extracting fingerprint sequence features, mainly including step S1 specifically including the acquisition of historical WiFi fingerprint data, connecting historical WiFi fingerprint data into fingerprint sequences, division of fingerprint sequences, and fingerprint sequence feature extraction, which specifically includes the following steps:

[0081] Step S1.1: collect the WiFi fingerprint data collected by crowdsou...

Embodiment 2

[0139] This embodiment provides a device for updating fingerprint database based on historical data and increments, please refer to Figure 7 , the device consists of:

[0140] The feature extraction module 701 is used to obtain historical WiFi fingerprint data, synthesize the historical WiFi fingerprint data into a first WiFi fingerprint sequence, and extract time features, spatial features and RSS features in the first WiFi fingerprint sequence;

[0141] The clustering module 702 is used to cluster historical WiFi fingerprint data based on a preset clustering algorithm in sequence according to time features, spatial features, and RSS features to obtain clustering results, wherein the historical WiFi fingerprint data is fingerprint data in the same closed area ;

[0142] The data matching module 703 is used to obtain the current WiFi fingerprint data, and to the current WiFi fingerprint data, based on the clustering result, the historical WiFi fingerprint data is matched to ...

Embodiment 3

[0174] Based on the same inventive concept, the present application also provides a computer-readable storage medium 800, please refer to Figure 8 , on which a computer program 811 is stored, and the method in Embodiment 1 is implemented when the program is executed.

[0175] Since the computer-readable storage medium introduced in the third embodiment of the present invention is the computer-readable storage medium used to implement the method for updating the fingerprint library based on historical data and increments in the first embodiment of the present invention, it is based on the embodiment of the present invention For the method described, those skilled in the art can understand the specific structure and deformation of the computer-readable storage medium, so details are not repeated here. All computer-readable storage media used in the method of Embodiment 1 of the present invention belong to the scope of protection of the present invention.

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Abstract

The invention provides a method and a device for updating a fingerprint database based on historical data and increments, wherein the method comprises the following steps: extracting temporal features, spatial features and RSS features from historical WiFi fingerprint data; after feature extraction, adopting DBSCAN to cluster the data collected in the same enclosed area three times according to the above features; after clustering, searching the historical WiFi fingerprint data with high enough matching degree with the current WiFi fingerprint data; for the probe data, the current WiFi fingerprint data and the historical WiFi fingerprint data, setting a confidence matrix; collecting the first complete fingerprint library of the current map in an unmanned environment, and setting an OS-ELMmodel for each AP, and carrying out the initial training to this model; after each data arrival, incrementally updating the model, and then obtaining the second complete fingerprint database by usingthe updated network model. The invention realizes the technical effects of improving the renewal efficiency and the positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of indoor pedestrian positioning, in particular to a method and device for updating a fingerprint library based on historical data and increments. Background technique [0002] Indoor positioning based on WIFI (Wireless-Fidelity Wireless Fidelity) fingerprints is divided into two parts in the indoor environment: the first is the offline stage, collecting the WIFI received signal strength (Received SignalStrengthRSS) of different indoor locations and building a fingerprint database; then the online location In the query phase, pedestrians give their current RSS value through their mobile phones, and based on the pre-established fingerprint database, the current indoor position of pedestrians is calculated. [0003] However, in the prior art indoor positioning based on WIFI fingerprints, the main problem is the lack of stability of WIFI signals. Many environmental factors, such as temperature, humidity, light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/23G06F16/2458
Inventor 牛晓光王安康张淳王嘉伟王震杨青虎
Owner WUHAN UNIV