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Indoor positioning method

An indoor positioning and point-to-be-located technology, applied in the field of positioning, can solve problems such as fingerprint database not being updated in time, fingerprint database positioning accuracy reduction, poor real-time positioning, etc., and achieve the effect of enhanced real-time performance, high real-time performance, and reduced positioning time

Active Publication Date: 2021-07-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the fingerprint library itself is not updated in time, and the impact of device software and hardware differences on the positioning results is not considered, resulting in poor real-time positioning and reduced positioning accuracy of the fingerprint database.

Method used

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Examples

Experimental program
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Embodiment

[0043] see figure 1 with figure 2 , this embodiment relates to an indoor positioning method, comprising the following steps:

[0044] Step 1. In the offline stage, according to the indoor structure and layout, divide the indoor area, establish the corresponding coordinate axes, and set the reference points in the area, and use different types of equipment at the reference points at multiple locations of each reference point. The RSSI of the wireless signal is collected multiple times in both directions to form a fingerprint vector to build a fingerprint database; the wireless signal includes Wi-Fi, RFID and Bluetooth. The reference point in the region is determined according to the size of the region and actual positioning accuracy requirements. The specific content of described construction fingerprint storehouse comprises:

[0045] 1) Select the target device, and use the collected fingerprint vectors to build a fingerprint library;

[0046] 2) Build a first-level finge...

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Abstract

The invention discloses an indoor positioning method, which comprises the following steps of: in an offline stage, according to an indoor structure and layout, performing indoor region division, establishing corresponding coordinate axes, setting reference points in the regions, acquiring RSSI (Received Signal Strength Indicator) of wireless signals by using different types of equipment at the reference points, and forming fingerprint vectors so as to construct a fingerprint database; fitting the RSSI of the wireless signal by the BP neural network; performing an electronic map, and storing information in a database; in the online positioning stage, firstly, performing region positioning, and determining a to-be-positioned point region; performing position positioning in the region, and determining the position coordinates of the to-be-positioned point; according to the target information, determining a reference point set required to reach the target position, and then combining the current position information to determine whether the current position advances towards the target position; and updating the fingerprint database in real time according to various feedback information. According to the invention, the fingerprint database can be updated in time, the real-time performance of the fingerprint database is enhanced, and the positioning precision is high.

Description

technical field [0001] The invention relates to a positioning method, in particular to an indoor positioning method. Background technique [0002] Due to the complex indoor environment and natural isolation reasons such as wall occlusion, satellite signals are severely attenuated indoors, which cannot meet the accuracy requirements of indoor positioning or even complete indoor positioning. [0003] The traditional ultrasonic and infrared positioning technology responds well to positioning within the line-of-sight range, but it cannot be positioned under non-line-of-sight conditions, and is more suitable for positioning in small-scale line-of-sight conditions; while visible light and UWB (ultra-wideband) can achieve non-line-of-sight conditions Positioning, but additional software and hardware need to be installed to assist positioning, which is costly and visible light is easily affected by other light sources; as for the indoor magnetic field, the magnetic field strength at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04B17/318G06N3/08G06N3/04G06K9/62G01S5/02
CPCH04W64/006H04B17/318G01S5/0252G06N3/084G06N3/044G06N3/045G06F18/23
Inventor 马建国谢恩德
Owner GUANGDONG UNIV OF TECH
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