Research On Precise Positioning Technology Of Mine Rescuers

In recent years,incidents of casualties of disaster relief personnel still occur from time to time in the process of mine rescue.In order to be able to carry out underground rescue work in a timely and effective manner after the disaster,this paper proposes an accurate personnel positioning system based on mine disaster relief communication system.The functions of the rescue positioning system mainly include real-time monitoring of the positioning personnel,track query and dangerous alarmsThis paper starts with the current wireless communication transmission mode of coal mine underground.By comparing the personnel positioning technology and the advantages and disadvantages of the positioning system,considering the danger,complexity and variability of the downhole disaster situation,the Mesh network is selected as the backbone network for the disaster communication.The disaster relief personnel positioning system is mounted on the platform to make the overall system flexible and portableWhile determining the system information transmission and positioning mode,the system platform is used to test its positioning accuracy.In order to reduce and control the positioning error generated by the system,according to the measured data in the simulation environment and the measurement environnment factors of the system,the causes of the error are analyzed in detail,and the corrected CAD map is modified by QGIS software and the adaptive Kalman is applied.This makes the system improve the positioning accuracy under the Mesh network Through the collection of on-site video and audio and its synchronous transmission,gas monitoring real-time transmission and personnel positioning information transmission,it will provide accurate and real-time on-site reference data for the rescue command center;the design of intrinsically safe circuit is the premise conditions of using electrical equipment underground.Through studying intrinsically safe circuit control methods and power supply overvoltage,undervoltage,short circuit protection,etc.,which means studying the intrinsically safe design of communication circuits and power supplies,it will provide necessary protection for the downhole use of the system.After determining the design and implementation plan of the disaster relief personnel's precise positioning system,the one-dimensional positioning measurement in the simulated roadway of the coal mine is carried out,and it is concluded that the system can achieve a positioning accuracy of 0.4m,which can meet the positioning requirements of the disaster relief personnel.The research results of this thesis will be of great significance to the effective implementation of underground disaster relief tasks,the safety of rescue workers and the application development of underground wireless positioning technology.