Anti-collision algorithm for wireless communication of mine mobile object

An anti-collision algorithm and wireless communication technology, which is applied in the anti-collision field of the underground personnel positioning system, can solve problems such as missing cards, low reliability, and errors in the actual situation of the ground control center.

Inactive Publication Date: 2014-09-10
SHANXI DATONG UNIV
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AI Technical Summary

Problems solved by technology

The concurrent missed reading rate of some positioning system tags is even above 30%, which is far from meeting the needs of the industry
[0005] (2) The function of the system is not perfect, the reliability is not high, and the positioning of the complete personnel identification area cannot be realized, and it is prone to "multiple cards",
[0006] "Missing card" or "one card with multiple locations at the same time" and other phenomena, the information received by the ground control center is inconsistent with the actual situation

Method used

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  • Anti-collision algorithm for wireless communication of mine mobile object
  • Anti-collision algorithm for wireless communication of mine mobile object
  • Anti-collision algorithm for wireless communication of mine mobile object

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Experimental program
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Embodiment Construction

[0020] 1. Tag collision model analysis

[0021] Mine moving target positioning system is based on the back-off algorithm of active RFID technology, and the tag collision phenomenon is analyzed below. Let the effective listening time of the tag be t L , the sending time is t S , sleep time is t W . The tag enters the sleep state after sending data each time, after t W Wake up after the time and send data again, and go to sleep again after sending. Therefore, the workflow of the tag is a periodic job. Let the tag listen, send, and sleep once as the working cycle, and the duration is T, then:

[0022] T=t L +t S +t W +Δt

[0023] Where Δt is the time it takes for the tag to switch from the wireless transmission state to the dormant state, that is, the time interval between working state transitions. due to t L , t S and Δt are millisecond level, t W It is at the second level, so the duty cycle is approximately equal to the sleep time.

[0024] The CSMA / CA judgment o...

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Abstract

In a coal mine underground mobile object positioning system, a reliable wireless communication algorithm with a good concurrent identification capability is designed, such that the reading leakage rate of the positioning system can be effectively reduced, and through control of a wireless bump probability, the system reliability is improved, thus the goals of improving the performance of the mine mobile object positioning system and providing a safety guarantee for coal mine production are realized. On the basis that several wireless communication technologies of the mine positioning system and influences on the reading leakage rate are analyzed, the invention discloses a "multi-concurrent leakage screening" algorithm and introduces a "time slice scheduling" algorithm on the multi-concurrent leakage screening algorithm, such that the algorithm effectively reduces the reading leakage rate on the basis that bidirectional communication between a card reader and a label is realized, thus two purposes are achieved through one move.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an anti-collision method for underground moving target communication in coal mines, that is, an anti-collision method for an underground personnel positioning system. Background technique [0002] With the development of communication technology and computer technology in our country, underground positioning systems based on passive radio frequency identification, active radio frequency identification, Zigbee network and other technologies have been developed successively through imitation and independent research and development. [0003] After analyzing and investigating the underground wireless communication technology of many positioning systems, it is found that the following two aspects are the "common problems" of many positioning systems: [0004] (1) Concurrent recognition ability is not strong. The so-called concurrent identification capabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
CPCY02B60/50
Inventor 张楠
Owner SHANXI DATONG UNIV
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