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Method and system for ultra wide band positioning in coal mine

A positioning method and ultra-wideband technology, applied in positioning, transmission systems, radio wave measurement systems, etc., can solve problems such as low positioning accuracy, poor anti-interference ability, and limited volume of mine positioning equipment

Inactive Publication Date: 2012-09-19
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0006] In order to overcome the above deficiencies, especially in order to overcome the poor anti-interference ability of the mine positioning system, low positioning accuracy, limited volume of mine positioning equipment, and NLOS propagation of ultra-wideband signals in the mine, the present invention provides an accurate mine positioning system. Ultra-wideband positioning method and system

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  • Method and system for ultra wide band positioning in coal mine
  • Method and system for ultra wide band positioning in coal mine
  • Method and system for ultra wide band positioning in coal mine

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Embodiment Construction

[0057] In order to make the technical solutions, features and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0058] figure 1 It is the schematic diagram of TOA-based positioning in the case of NLOS according to the present invention.

[0059] Such as figure 1 As shown, in the TOA-based UWB positioning system, each arrival time τ determines a circle center as the reference node radius r i A circle of =c×τ(i=1, 2, 3), where c is the propagation speed of the UWB signal in the tunnel. If there is no NLOS error and measurement noise error, the three circles determined by TOA can completely intersect at one point in two-dimensional space, which is the position of the target node; if there is NLOS error and measurement noise error, the measurement distance is The sum of the real distance s, NLOS error and measurement noise error. Usually, the NLOS error wil...

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Abstract

The invention discloses a method and a system for ultra wide band positioning in a coal mine. The method is based on a nonparametric non line of sight (NLOS) identification and ultra wide band (UWB) positioning technology of a weighted least square method, a nonparametric NLOS identification method is used for performing NLOS identification, corresponding weighting factors are distributed according to NLOS identification results, a novel weighted least square method positioning algorithm is constructed, and the algorithm is used for estimating the position of a goal node. The system comprises a browser server of a remote monitoring layer, a data server, a ground monitoring terminal, a switch, a goal node of an on-site monitoring layer, a reference node, a gateway and a base station, wherein devices applied in the mine are all safe in nature. The method and the system for the ultra wide band positioning in the coal mine has the advantages of being strong in anti-interference capacity, high in positioning accuracy, low in cost, simple in system device structure, low in energy consumption and suitable for roadway working environment.

Description

technical field [0001] The invention relates to the field of underground safety monitoring in coal mines, in particular to an ultra-broadband precise positioning method and system in underground coal mines. Background technique [0002] Coal is the main energy source in our country, but the working environment of coal mines is harsh, the geological environment is complex, the mining technology is relatively backward, and the quality of underground production personnel is low, which leads to various vicious accidents in mines. Accurately grasp the distribution and operating conditions of underground personnel, and the efficiency of rescue and disaster relief is low. The lives of underground workers are seriously threatened. With the continuous advancement of science and technology, people have deployed a variety of detection systems and monitoring systems underground in order to know the location of underground workers, facilitate timely rescue work and management scheduling...

Claims

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Application Information

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IPC IPC(8): G01S5/00H04W4/02H04W4/06H04W64/00H04B1/7163
CPCY02B60/50Y02D30/70
Inventor 田子建王宝宝
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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