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An Anti-Continuous Collision Method for Downhole Instant Locating Tags

A technology for locating labels and labels, applied in the directions of instruments, inductive record carriers, electromagnetic radiation induction, etc., can solve problems such as practical implementation difficulties, and achieve the effect of low missed reading rate

Active Publication Date: 2021-02-09
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since many tag hardware structures do not have the conditions to generate random numbers, these methods of using random transmission intervals are very difficult to implement in practice

Method used

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  • An Anti-Continuous Collision Method for Downhole Instant Locating Tags
  • An Anti-Continuous Collision Method for Downhole Instant Locating Tags
  • An Anti-Continuous Collision Method for Downhole Instant Locating Tags

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Embodiment Construction

[0032] The present invention will be further described below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The tag and the card reader work in the same wireless channel, and the card reading cycle of the card reader is T r , the channel time occupied by the tag transmitting identification code is t s , there are any two tags A and B in the reading range of a certain card reader for a long time, and the transmission period is T ta , T tb , there is a time difference Δt in the first transmission of two tags in the identification area at the same time, satisfying Δt≤max(T ta , T tb );

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Abstract

The invention discloses a downhole instant positioning tag continuous-collision prevention algorithm, and the algorithm comprises the steps: building a tag signal continuous collision model, and carrying out the simulation and result analysis based on a recognition code transmitting interval generation algorithm. The algorithm is an IBBIGA (Identity Based Blink Interval Generating Algorithm) whichcan achieve the generation of a plurality of transmitting intervals for each tag without a random number. The algorithm effectively prevents the continuous collision, and guarantees that the mean transmitting intervals of all tags are the same. Compared with a pure ALOHA protocol and INCITS371.1 protocol transmitting interval generation method, the algorithm (IBBIGA) is lower in reading leakage rate through simulation analysis.

Description

technical field [0001] The invention relates to a method for preventing continuous collisions, in particular to a method for preventing continuous collisions of downhole real-time positioning tags. Background technique [0002] The real-time positioning system plays an important role in the production management of coal mines and the response to emergencies. Its main function is to obtain and display the specific location of underground moving targets in real time. The system is usually implemented using RFID technology, by fixing the tag on the moving target, and then using the card reader distributed underground to receive the identification code emitted by the tag to determine the location of the target. Usually the system will use active tags to increase the recognition distance, that is, the tag actively broadcasts the identification code periodically. In order to make the label work for a longer time and reduce costs, only issue labels are often used. [0003] When m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/10
CPCG06K7/10019
Inventor 田传耕黄为勇孙永卑露露陈奎
Owner XUZHOU UNIV OF TECH