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An RFID indoor positioning system based on depth perception and its working method

An indoor positioning and working method technology, applied in radio wave measurement systems, memory record carrier reading problems, reflection/re-radiation of radio waves, etc., can solve problems such as the inability of sensing channels to effectively shield the system, and improve positioning accuracy. , optimize system parameters, improve the effect of positioning accuracy

Active Publication Date: 2017-02-08
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing positioning technologies, including WiFi, iBeacon and other indoor technologies, are based on the signal strength (RSSI) for positioning. This single, simple perception channel cannot effectively shield various uncertainties within the system and the environment. , to improve the performance of positioning

Method used

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  • An RFID indoor positioning system based on depth perception and its working method
  • An RFID indoor positioning system based on depth perception and its working method
  • An RFID indoor positioning system based on depth perception and its working method

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Embodiment Construction

[0022] The present invention is mainly made up of the following parts in the hardware part, as figure 1 :

[0023] Radio Frequency Identification Reader: Its functions include: 1) Collect the information of tags within the reading range in real time, including tag identification codes, energy strength values ​​of tag reflected signals, etc.; 2) The reader uses an external antenna, and a single reader can be connected to an external Multiple antennas form an antenna array; 3) The parameters of the antenna's transmitted signal, including the transmitted energy, can be modulated to a certain extent, and an interface is provided to facilitate the algorithm design and call.

[0024] Radio frequency identification antenna array: The external antennas of the above-mentioned readers form an antenna array in a specific way. Its functions include: 1) The composition of the antenna array is complementary, and the tags within the reading range can be scanned from different angles; 2) Eac...

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Abstract

The invention discloses a RFID indoor positioning system based on the depth perception and an operating method thereof. The system comprises a RFID reader, RFID external antennas and passive RFID tags. RFID external antenna arrays and reference tag arrays are arranged in the space properly, the reference tags carried by a target object are positioned through a power hopping and feedback correction mechanism, and the position of the target object can be estimated. The method is characterized in that on the basis of the depth perception, aiming to the features of the passive RFID tags, deep data are sensed through two varieties of multi-dimensional and deep systems, and an accurate and real-time indoor positioning mechanism is provided. In the spatial dimension, the system performance is improved through layer-crossed perception and parameter optimization; in the time dimension, the system corrects the accuracy of next positioning by collecting feedback data in an adaptive manner.

Description

technical field [0001] The invention relates to an indoor precise positioning system, specifically based on passive radio frequency identification technology, and performs in-depth perception information according to the characteristics of passive radio frequency identification technology, obtains multi-dimensional and deep-level information, and comprehensively applies it in the positioning process . Background technique [0002] With the rapid development of the "Internet of Things", a series of core technologies of the Internet of Things represented by radio frequency identification technology have been developed rapidly. The non-contact, fast and efficient identification technology based on radio frequency identification technology has attracted widespread attention. At the same time, due to the key position of location-based services in future smart life, indoor positioning systems are becoming more and more important. Existing positioning technologies, including WiFi,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/75
CPCG01S13/75G06K7/0008
Inventor 谢磊王楚豫陈曦陆桑璐
Owner NANJING UNIV
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