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Positioning method and system based on rfid and wi-fi fusion

A positioning method and positioning system technology, applied in the field of positioning methods and systems based on RFID and Wi-Fi integration, can solve the problem of high-precision indoor positioning technology, expensive manual processing support, difficulty in balancing accuracy and cost, and restrictions on popularization of technology, etc. problem, to achieve the effect of low networking cost, low cost, and strong anti-interference ability

Active Publication Date: 2022-06-07
XIAMEN UNIV TAN KAH KEE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Second, it is difficult to balance accuracy and cost. High-precision indoor positioning technology requires relatively expensive additional auxiliary equipment or a large amount of manual processing support in the early stage, which greatly restricts the popularization of the technology.

Method used

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  • Positioning method and system based on rfid and wi-fi fusion
  • Positioning method and system based on rfid and wi-fi fusion
  • Positioning method and system based on rfid and wi-fi fusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Please refer to figure 2 , this embodiment provides an indoor positioning method based on the fusion of RFID and Wi-Fi.

[0057] First, it is necessary to construct a network environment covered by Wi-Fi signals and RFID signals overlapping. The network environment is obtained by the arrangement of the Wi-Fi signal access point AP and the RFID reader. There is no fixed position for the placement of the AP and the RFID reader in the network environment. They can be arranged according to the actual needs of the network environment. Any place in the network environment must cover at least one AP's Wi-Fi signal and one RFID reader's RFID signal. Preferably, the placement point of the AP can be arranged first, and then the RFID reader is prevented from being within the coverage of the AP signal according to its effective coverage.

[0058] Then, when any positioning target carrying the RFID tag to be tested enters the above network environment, at least one AP and one RFI...

Embodiment 2

[0078] This embodiment is further expanded on the basis of Embodiment 1, and provides a specific application example:

[0079] 1. Build as image 3 The positioning network shown.

[0080] For the specific arrangement of APs and RFID readers in the positioning network, N APs, M RFID readers and K tags to be tested can be set according to different requirements. like image 3 The positioning network shown contains 4 APs, 25 RFID readers and 10 tags to be tested. The 4 APs are distributed at four vertices and are separated by 50 meters; 25 RFID readers are evenly distributed in these 4 Within the coverage area of ​​the AP signal, the distance between the RFID readers is 5 meters; the tags to be tested are distributed arbitrarily, and each tag to be tested contains a wireless network card and an RFID tag.

[0081] 2. Obtain Wi-Fi access point AP and RFID reader.

[0082] Specifically, when the tag to be tested enters the coverage of the positioning network, the AP and the RFID...

Embodiment 3

[0114] This embodiment corresponds to the "3.3" point in the second embodiment, that is, for the positioning method when the number of APs and the number of RFID readers in "2)" are both one, a specific application scenario is provided:

[0115] see Figure 4 , the label to be tested 7 in the figure is used as the positioning target. because Figure 4 The positioning network coverage of the Figure 5 ,for Figure 4 The partial layout diagram corresponding to the tag to be tested 7 in , to show the positional relationship between the tag to be tested 7 and the AP and the RFID reader in more detail.

[0116] from Figure 5 It can be concluded that the coordinates of the tag 7 to be tested are (6, 35); the AP that currently reads the tag 7 to be tested is AP2, and the coordinates are (0, 50); the RFID reading of the tag 7 to be tested is currently read. Device 4, the coordinates are (5, 35).

[0117] Assuming that the RFID reader 4 reads the RSSItag=5 of the tag 7 to be tes...

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Abstract

The present invention provides a positioning method based on RFID and Wi-Fi fusion and a system thereof. The method includes: constructing a network environment in which Wi-Fi signals and RFID signals overlap; after triggering a positioning command corresponding to an RFID tag to be tested, determine the latest There are at most two APs and an RFID reader of the RFID tag to be tested; a straight line is determined according to the coordinates of one of the APs and one of the RFID readers, and at most two straight lines are obtained; according to the coordinates of the RFID reader and The RSSI value of the RFID reader determines a circle; obtains the intersection coordinates of the at most two straight lines and the circle; determines the current coordinates of the RFID tag to be tested according to the intersection coordinates. The invention also has the characteristics of strong anti-interference, low cost, high positioning accuracy, simple calculation, simple and practical implementation, etc., and is very suitable for real-time positioning.

Description

technical field [0001] The invention relates to the field of positioning, in particular to a positioning method and system based on the fusion of RFID and Wi-Fi. Background technique [0002] With the popularization of smartphones and mobile Internet, emerging industries such as Location Based Service (LBS) are emerging, and people's demand for positioning and navigation is getting higher and higher. In complex indoor environments, such as airports, exhibition halls, warehouses, supermarkets, hospitals, libraries, underground parking lots, etc., it is often necessary to determine the indoor location of mobile terminals or their holders, facilities and items. The research of positioning technology can provide good solutions for application scenarios such as asset management, smart home, underground rescue, and item exhibition, so it has attracted extensive attention from academia and industry at home and abroad. [0003] At present, indoor positioning technologies mainly inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/021H04W4/33H04W4/80
CPCH04W4/021H04W4/023H04W4/33H04W4/80Y02D30/70
Inventor 曾党泉
Owner XIAMEN UNIV TAN KAH KEE COLLEGE