High-precision positioning method for wireless mobile terminal at mine tunnel

Abstract

The invention being title as ''High-precision positioning method for a wireless mobile terminal at a mine tunnel'' provides a high-precision positioning method and system for a wireless mobile terminal in a mine tunnel environment, thereby solving a problem that high-precision positioning of a wireless mobile terminal at a mine tunnel can be not be realized by using the existing wireless positioning method and method. According to key points in the technical scheme, an on-site surveying is carried out to realize tunnel wireless signal sampling and a tunnel signal transmission distance correction model; a positioning base station receives a positioning request signal of a mobile terminal and a positioning response signal is returned; a mobile terminal transmits positioning interaction data to a positioning base station; the positioning base station calculates a theoretical distance of the mobile terminal; the theoretical distance is calculated by using the tunnel signal transmission distance correction model to obtain a maximum likehood position; and a final position of the mobile terminal is obtained by using a heuristic position correction algorithm in the method. The provided method can be widely applied to wireless high-precision positioning of the personnel and mobile equipment at the mine tunnel.

Description

technical field [0001] The invention relates to a method for detecting a wireless mobile terminal in a mine roadway and accurately calculating its position, especially based on the time of flight (Time Of Flight, TOF) of a positioning signal measured between a positioning base station and a wireless mobile terminal and field surveys. The roadway signal transmission distance correction model and the heuristic position correction algorithm are used for high-precision positioning. Background technique [0002] There are mainly RSSI-based methods and TOA methods for the precise positioning of mine roadways. In the RSSI method, it is assumed that the strength of the positioning signal is constant when it is transmitted, and the loss of the signal in the propagation process is calculated according to the strength value of the positioning signal received by the base station, and the propagation loss is converted into a distance according to the theoretical or empirical signal propa...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect that the current wireless positioning method cannot realize high-precision positioning in mine roadways, the present invention researches and develops a method for detecting wireless mobile terminals in mine roadways and accurately calculating its position, and comprehensively utilizes positioning signals measured between positioning base stations and wireless mobile terminals Time Of Flight (TOF), roadway signal transmission distance correction model established by field survey and heuristic position correction algorithm to realize wireless high-precision positioning of mine roadway personnel and equipment

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