Underground coal mine accurate positioning method without clock synchronization

A technology of precise positioning and clock synchronization, which is applied in the fields of ranging and positioning, and radio communication, and can solve problems such as regional positioning, high cost, and difficult system synchronization

Active Publication Date: 2017-04-26
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Time of Arrival positioning TOA requires strict synchronization between the positioning card and substations, and between substations
Time difference of arrival (TDOA) positioning does not require synchronization between the positioning card and substations, but strict synchronization between substations is required. System synchronization is difficult, crystal oscillator stability is high, and the cost is high, especially for identification cards.
At present, the number of positioning systems based on radio frequency identification technology (RFID) is the largest in actual use in mines. The use of RFID has the following problems: the positioning accuracy is limited by the distribution density of readers, and only regional positioning can be achieved, and accurate positioning with an error of severa

Method used

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  • Underground coal mine accurate positioning method without clock synchronization
  • Underground coal mine accurate positioning method without clock synchronization
  • Underground coal mine accurate positioning method without clock synchronization

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Experimental program
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Effect test

Embodiment Construction

[0022] The positioning method is realized by an underground positioning system, and the underground positioning system is composed as follows figure 1 Shown:

[0023] 1. Monitoring terminal (101), production management personnel access the positioning server through the monitoring terminal to realize real-time monitoring of underground staff and related equipment. The monitoring terminal has map display, staff location and data display query, staff location statistics, historical location Tracking query and other functions. The geographic information platform can use the MapX mapping component, the mine map is a vector map of the two-dimensional profile of the roadway, and the map file is in the MapInfo format.

[0024] 2. The positioning storage server (102), responsible for receiving and storing the positioning card position data sent by the substations, and providing retrieval and query services for the GIS server and the monitoring terminal.

[0025] 3. The GIS server (1...

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Abstract

The invention provides an underground coal mine accurate positioning method without clock synchronization. An underground mine tunnel serves as a one-dimensional channel for analysis; a system structure of positioning substations+ positioning cards is adopted; by utilizing known distance between substations, adjacent substations carry out ranging communication with each positioning card respectively, and the positioning initiating substation finishes ranging and positioning calculation without any timing and data operation of the positioning cards; and distance between each personnel positioning card and the substations can be accurately obtained by utilizing the known distance between substations, and thus accurate positioning is realized. When the accurate positioning method is implemented, clock synchronization is not needed between the substations and between the substations and the positioning cards, and clock and crystal oscillator offset errors of a positioning device can be eliminated. The accurate positioning method is simple in realization process, fast in positioning speed and high in real-time performance, and has a wide popularization value.

Description

technical field [0001] The invention relates to a coal mine underground accurate positioning method without clock synchronization, and the method relates to the fields of radio communication, distance measurement and positioning technology and the like. Background technique [0002] The "Notice of the State Administration of Work Safety and the National Coal Mine Safety Supervision Bureau on the Construction and Improvement of the "Six Major Systems" for Underground Coal Mine Safety and Avoidance" (An Jian Zong Meizhuang [2010] No. 146) requires the construction and improvement of the coal mine underground personnel positioning system. Give full play to the role of the underground personnel positioning system in personnel management and emergency rescue work. "Priority should be given to products with advanced technology, stable performance, and high positioning accuracy to ensure that the dynamic distribution of underground personnel and the number of personnel in the minin...

Claims

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Application Information

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IPC IPC(8): G01S11/02
CPCG01S11/02
Inventor 孙继平
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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