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

Indoor positioning environment feature point extraction method

A technology of environmental characteristics and indoor positioning, which can be used in services based on specific environments, services based on location information, and re-radiation of electromagnetic waves. It can solve problems such as inability to accurately locate indoor spaces, interference, and satellite signal blocking.

Active Publication Date: 2019-06-21
SUN YAT SEN UNIV
View PDF11 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the satellite signal is blocked and interfered in the indoor area, the indoor space cannot be accurately positioned, the present invention provides an indoor positioning environment A feature point extraction method, which is related to the internal environment of the building by using the energy loss of the wireless signal transmitted by the wireless communication device. The energy loss is usually used in indoor positioning. Received Signal Strength Indicator, RSSI) The distribution of signal strength in the indoor space shows a strong correlation with the indoor space structure

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 environment feature point extraction method
  • Indoor positioning environment feature point extraction method
  • Indoor positioning environment feature point extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] In this embodiment, a smart phone is used as a smart terminal to obtain the collector's track and RSSI information, a Bluetooth module is used as a wireless communication device, and a gyroscope and an accelerometer are used as sensors to describe the present invention in detail.

[0073] Such as figure 1 Shown, a kind of indoor positioning environment feature extraction method, described this method comprises the following steps:

[0074] Step S1: Raw data collection and preprocessing

[0075] In this embodiment, a smart phone and a two-dimensional LiDAR collection device are used to collect data in an indoor space, and the collected data is used to extract indoor positioning environment feature points. Before collecting data, first determine the relationship between the smartphone coordinate system and the world coordinate system at the initial moment, and obtain the coordinate transformation matrix, as follows:

[0076] Both the world coordinate system and the smar...

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 positioning environment feature point extraction method, and the method comprises the steps: obtaining the two-dimensional LiDAR point cloud data of an indoor space through a two-dimensional LiDAR collection device and obtaining the RSSI (Received Signal Strength Indicator) of signals of opportunity of a wireless communication device disposed indoors through an intelligent terminal; acquiring indoor environment characteristics when the RSSI is acquired from the two-dimensional LiDAR point cloud data, extracting indoor space structure characteristics with highpotential in combination with a collector track, further calibrating a signals of opportunity RSSI sequence peak value, and constructing indoor positioning environment characteristic points. Comparedwith a traditional method, the method has the advantages that the requirement on an indoor map is avoided when the indoor positioning environment feature points are extracted, the indoor space environment with high potential is obtained by utilizing the two-dimensional LiDAR point cloud and the collector track data, the feature points are automatically extracted, and the indoor positioning and navigation are enhanced. The method is suitable for the technical field of indoor positioning.

Description

technical field [0001] The present invention relates to the technical field of indoor positioning, and more specifically, to a method for extracting feature points of an indoor positioning environment. Background technique [0002] The Beidou satellite navigation system is widely used in many fields of national economy and social development, but because the satellite signal is blocked and interfered in the indoor area, the positioning problem in the indoor space has not been solved. Therefore, many indoor spaces do not have indoor map data, and even if there are indoor maps, there may be problems such as old map data. With the popularity of smart phone terminals, the industry has realized that smart phones are used as smart terminals to integrate ubiquitous wireless signals (including cellular signals, WiFi signals, Bluetooth signals, etc.), multi-source data (indoor maps, location fingerprint databases, images, etc.) to solve the indoor positioning problem. Before using ...

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
IPC IPC(8): G01S17/08H04W4/021H04W4/029H04W4/33H04W64/00
Inventor 吴东金夏林元耿继军彭清漪
Owner SUN YAT SEN UNIV
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