Underground coal mine personnel positioning system and positioning method

Abstract

The invention discloses an underground coal mine personnel positioning system and an underground coal mine personnel positioning method. The underground coal mine personnel positioning system comprises a ground control center which is arranged aboveground, and a transmitting base station, multiple gateway nodes, an optical fiber, a bus, multiple beacon nodes and multiple mobile nodes which are arranged underground, wherein all the underground equipment is intrinsically safe. The underground coal mine personnel positioning method is a BP (Back Propagation) neural network-based and non-ranging APIT (Approximate Point-in-triangulation Test) underground personnel positioning method. The underground coal mine personnel positioning method comprises the following steps: according to the structure of an underground laneway, deploying the beacon nodes; in a training state, generating coordinates of intersection points of every two circumcircles of three intersected triangles which are formed by the beacon nodes through training, and storing the coordinates in a database; in a positioning stage, testing according to a PIT (Power Interruption Test) test system to obtain rough positions of unknown nodes; comparing the rough positions with information in the database, and deploying mobile nodes at corresponding coordinate positions; and testing by using the PIT test system for precise positioning. The underground coal mine personnel positioning method has the advantages of high positioning accuracy, small calculating amount and small influence from the density of the beacon nodes.

Description

technical field [0001] The invention relates to the field of coal mine safety monitoring and communication, in particular to a BP neural network-based non-ranging APIT coal mine underground personnel positioning system and method. Background technique [0002] Coal is the main energy source in China. Coal mines are widely distributed in my country. As the mining range of underground coal seams in coal mines becomes larger and larger, the difficulty becomes more and more difficult. Coal mining technology is relatively backward, so mine accidents often occur. Safety issues pose a great threat. It is important to popularize safety awareness and establish and improve work rules and regulations, but the hazards caused by many irresistible factors are still emerging. When mine disasters occur, the most important thing is to rescue the staff. However, due to mine This special environment adds a certain degree of difficulty to the rescue workers, so a complete coal mine underground pe...

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Problems solved by technology

[0004] In view of the deficiencies of the prior art, especially the problems of low positioning accuracy, large amount of calculation, high communication overhead, large number of nodes, and low calculation accuracy of the coal mine underground personnel positioning system, the present invention discloses a positioning system with high positioning accuracy and simple algorithm. Positioning method with small number of nodes

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