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Underground moving target accurate positioning method

A technology for precise positioning and moving targets, applied in ranging, positioning, and radio communication fields, which can solve the problems of high crystal oscillator stability requirements, difficult system synchronization, and high cost.

Pending Publication Date: 2019-07-12
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transmission loss model of the wireless signal is greatly affected by the environment, and the positioning error is large
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 positioning cards to be synchronized with substations, but strict synchronization between substations is required, system synchronization is difficult, crystal oscillator stability is high, and the cost is high
The improved TOA ranging method bilateral double-range SDS-TWR method can suppress the error caused by system clock synchronization, but the positioning error increases with the distance between the positioning card and the positioning substation, so a new system-free method is needed Clock-synchronized, positioning error and distance-independent precise positioning method for moving targets in downhole

Method used

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  • Underground moving target accurate positioning method
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Examples

Experimental program
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Effect test

Embodiment Construction

[0038] The positioning method is realized by the downhole moving target precise positioning system, and the system composition is as follows: figure 1 Shown:

[0039] 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.

[0040] 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.

[0041] 3. The GIS server (103) is responsible for providing geographic information services for the monitoring terminal, uses the ArcGIS platform, and stores the relevant geographic information data of the mine, the loc...

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Abstract

The invention provides an accurate positioning method for an underground moving target. The roadway under the mine is used as a one-dimensional channel for analysis; the distance between the known positioning substations is utilized, the positioning cards respectively carry out distance measurement communication with the adjacent positioning substations, distance measurement and positioning calculation are completed by one of the positioning substations, the distance between the personnel positioning card and the positioning substations can be accurately obtained by utilizing the known distance between the substations, and accurate positioning is realized. When the accurate positioning method is used and implemented, clock synchronization is not needed between substations, and the positioning error is not increased along with increase of the distance between the positioning card and the positioning substation. The accurate positioning method is simple in implementation process, high inpositioning speed, high in real-time performance and high in popularization value.

Description

technical field [0001] The invention relates to a method for accurately locating an underground moving target, and the method relates to the fields of radio communication, ranging and positioning technology and the like. Background technique [0002] The mine personnel positioning system is one of the six safety and risk avoidance systems required by the State Council (Guo Fa [2010] No. 23) for coal mines and non-coal mines. The RFID technology widely used by mine personnel cannot be accurately positioned, and it is difficult to meet the needs of accident prevention and emergency rescue such as searching for people in distress and vehicle injuries in mines. Mine radio signal transmission attenuation is serious, radio transmission attenuation models are complex and changeable, satellite positioning signals cannot penetrate coal seams and rock formations to reach underground, and mine positioning needs to cover 10km roadways, etc., restricting the application of ground positio...

Claims

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Application Information

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IPC IPC(8): G01S5/06G01S5/02H04W64/00H04B17/318
CPCG01S5/0257G01S5/06H04B17/318H04W64/006
Inventor 孙继平
Owner CHINA UNIV OF MINING & TECH (BEIJING)