Reader-writer

A technology of reader-writer and radio-frequency channel, applied in the field of reader-writer, can solve the problems that the positioning effect and accuracy are difficult to meet the technical requirements, reduce the label capacity of the positioning system, and the shortage of radio frequency communication resources, etc., so as to improve data exchange capability and accurate signal Intensity information, the effect of reducing the influence of fading

Inactive Publication Date: 2011-11-09
北京烽火联拓科技有限公司
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  • Abstract
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Problems solved by technology

[0014] 1. For a real-time positioning system that requires security certification, the above structure will cause a shortage of radio frequency communication resources due

Method used

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  • Reader-writer
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Examples

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Example Embodiment

[0025] The technical solutions of the present invention will be further described below in conjunction with the drawings and specific implementations.

[0026] figure 1 It is a schematic diagram of the structure of the reader in the specific embodiment of the present invention. Such as figure 1 As shown, the reader includes a control unit 1 and a radio frequency unit 2. The radio frequency unit further includes three radio frequency channels. Each radio frequency channel includes a radio frequency module 201 and an antenna 202. The control unit and the radio frequency unit are connected by wire.

[0027] The three radio frequency channels work at different frequencies and are set to three different channels, which are responsible for the data interaction work of the corresponding authentication layer in the three-layer authentication without mutual interference. The first radio frequency channel is set to the receiving state for receiving positioning ID information sent by the ta...

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Abstract

The invention discloses a reader-writer which is applicable to a wireless real-time positioning system. The reader-writer comprises a control unit and a radio frequency unit, wherein the control unit is connected with the radio frequency unit through a wire; the radio frequency unit comprises three radio frequency channels; and each radio frequency channel comprises a radio frequency module and an antenna. Due to the adoption of the technical scheme, one reader-writer comprises the three radio frequency channels, so data exchange capability is enhanced and tag capacity supported by the real-time positioning system is expanded; meanwhile, by a diversity receiving method, the reader-writer acquires a plurality of fading signals which are counted independently and carry the same information and combines the plurality of received independently counted fading signals so as to reduce the influence of fading and acquire more accurate signal intensity information.

Description

technical field [0001] The invention relates to the technical field of wireless real-time positioning, in particular to a reader-writer. Background technique [0002] Real Time Location System (RTLS) refers to a system that locates targets in real time or near real time in a designated space (office building, venue, urban area, the world) through wireless communication technology. The location information of the target is obtained by measuring the physical characteristics of radio waves. [0003] The real-time positioning system is a positioning system based on ranging technology, which can be divided into positioning by received signal strength indicator (RSSI), positioning by time of arrival (TOA) or time difference on arrival (TDOA) ) positioning, and several technical solutions such as angle of arrival (AOA) positioning. [0004] The working principle of the real-time positioning system based on received signal strength is: the wireless signal strength will attenuate a...

Claims

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Application Information

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IPC IPC(8): G06K17/00
Inventor 张革军吕丰训
Owner 北京烽火联拓科技有限公司
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