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Reader optimization deployment method based on passive ultrahigh-frequency RFID positioning system

A positioning system and reader technology, applied in the field of radio frequency communication, can solve problems such as reducing positioning efficiency

Active Publication Date: 2016-01-13
西安富立叶微电子有限责任公司
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AI Technical Summary

Problems solved by technology

At present, typical passive UHF RFID readers can only reduce the power transmission energy level step by step to obtain the minimum energy level of each tag. When the position of the reader and the reference tag is close, unnecessary energy level switching will Cause unnecessary time-consuming positioning and reduce positioning efficiency

Method used

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  • Reader optimization deployment method based on passive ultrahigh-frequency RFID positioning system
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  • Reader optimization deployment method based on passive ultrahigh-frequency RFID positioning system

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Embodiment Construction

[0023] The gist of the present invention is to propose a reader optimization deployment method based on a passive UHF RFID positioning system. The reader deployment method obtained by the method can effectively improve the positioning efficiency of the system.

[0024] Attached below figure 1 , attached figure 2 , attached image 3 , attached Figure 4 , attached Figure 5 , attached Image 6 Embodiments of the present invention are further described in detail.

[0025] 1. The establishment of the mapping relationship between the power emission level of the reader and the radiation radius

[0026] Based on the Friss power loss model, the transmit power P of the reader can be obtained t The corresponding maximum radiation radius R

[0027] R = ( G r G t λ 2 ...

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Abstract

The invention belongs to the technical field of radio-frequency communication, and relates to a reader optimization deployment method based on a passive ultrahigh-frequency RFID positioning system. The method comprises the steps: analyzing a relationship between a reader emission energy level and a radiation radius, constructing a target adaptive value function based on positioning time consumption according to the LANDMARC algorithm principle, taking positions of various readers in a system as optimization searching variables, taking the fact that the target adaptive value function is minimum as a optimization searching target, building an optimization searching particle model through adoption of the typical particle swarm algorithm, improving the local searching capability and the global searching capability through introducing the simulation annealing algorithm, and then determining an optimal deployment mode of the readers. The method is advantageous in that the LANDMARC algorithm principle and a passive RFID identification mechanism are integrated, the system time-consuming particle optimization searching model suitable for passive ultrahigh-frequency RFID positioning is built, and positioning efficiency of the system can be effectively improved through the obtained reader deployment mode.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, and relates to a reader optimization deployment method based on a passive ultra-high frequency RFID positioning system. Background technique [0002] In recent years, passive UHF RFID systems have been widely used in indoor positioning due to their advantages of non-contact, non-line-of-sight, high precision and low cost. As the main solution based on RFID indoor positioning, the LANDMARC system introduces reference tags with known positions for auxiliary positioning, compares the Euclidean distance of the field strength information of the reference tags and the positioning tags, finds the nearest neighbor reference tags, and realizes the positioning of the positioning tags according to the empirical weight formula. location estimate. Compared with other positioning algorithms, the LANDMARC algorithm has the characteristics of low cost and high precision. [0003] Position...

Claims

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Application Information

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IPC IPC(8): G06K7/00G06K7/10
Inventor 史伟光韩晓迪祁晓丽李建雄
Owner 西安富立叶微电子有限责任公司
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