Underground personnel positioning method based field intensity and step-mounting distance measurement

Abstract

The invention discloses an underground personnel positioning method based field intensity and step-mounting distance measurement. The positioning method is characterized by precisely positioning the underground personnel using a specialized positioning device by a system server and a little amount of wireless access devices, the positioning process is simple and effective, the resistance against electromagnetic interference is powerful, and the robustness is rather strong; a positioning system adopted by the positioning method is high in positioning precision, low in cost, simple in system device structure and easy to come into effect. And the positioning method is convenient for dispatching management of safety production management personnel, and provides rather precise personnel position information for rescue workers when a mine disaster occurs, so that the rescue efficiency and the rescued probability of trapped workers are improved.

Description

technical field [0001] The invention relates to a method for detecting the position of underground personnel, and the method relates to the fields of radio communication, distance measurement and positioning technology and the like. Background technique [0002] Downhole personnel positioning is an important measure for safe production. Over the years people have adopted various methods to detect the position of underground personnel. The commonly used positioning methods are: receiving signal strength indication (Received Signal Strength Indication, RSSI), measuring angle of arrival (Angle Of Arrival, AOA), measuring time of arrival (Time Of Arrival, TOA), measuring time difference of arrival (Time Difference Of Arrival, TDOA) and radio frequency identification technology (RFID, Radio Frequency Identification) and other methods. [0003] At present, the actual use is mainly based on radio frequency identification technology (RFID). RFID uses radio frequency to carry out n...

AI Technical Summary

Problems solved by technology

[0004] 1. The positioning accuracy is limited by the distribution density of the readers, and can only achieve regional positioning, and cannot achieve accurate positioning with an error of a few meters;

[0005] 2. Limited by the reading and writing speed of RFID, it cannot handle the situation that many people pass through the card reading system at the same time, and it is easy to miss reading

However, the transmission loss model of wireless signals is greatly affected by the environment, so the general RSSI positioning system often has to rely on increasing the density of anchor nodes and using a global optimization algorithm to control the positioning error in one direction, but the underground environment is mostly a linear environment composed of tunnels. Field strength data in other directions on the plane cannot be obtained, so when there are other factors affecting wireless signal transmission such as large metal obstructions in the tunnel, the positioning error is large, so a field strength data that does not depend on other directions is needed A positioning method that can accurately locate underground

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