煤矿井下精确定位系统研究

Research on precise positioning system of coal mine underground

针对现有基于RFID,ZigBee,WiFi等技术的煤矿井下人员定位系统定位精度较低的问题,提出了融合可见光通信和惯性导航系统的煤矿井下精确定位系统。该系统以煤矿井下LED照明灯作为LED可见光定位基站,利用智能信息矿灯内置CMOS摄像头接收可见光信号进行定位,利用智能信息矿灯内置加速度传感器和陀螺仪数据进行时间积分得到井下人员运动轨迹和方向,并通过智能信息矿灯识别LED可见光定位基站的ID编码信息重新定位来修正惯性导航数据,从而实现精确定位。在煤矿井下布置8个LED可见光定位基站,通过5台智能信息矿灯以正常速度移动来测试系统定位精度,结果表明系统定位误差小于1 m,满足煤矿井下人员定位精度要求。

For low position precision of existing personnel positioning system of coal mine underground based on RFID,ZigBee,WiFi and so on,a precise positioning system of coal mine underground was proposed which combined visible light communication with inertial navigation system.In the system,underground LED lighting lamp is taken as LED visible light positioning base-station.Visible light signal is received by CMOS camera in intelligent information mining-lamp for positioning.Data of acceleration sensor and gyro in intelligent information mining-lamp is timely integrated to get moving track and direction of underground personnel.Data of inertial navigation system could be corrected through intelligent information mining-lamp identifying ID coding information of LED visible light positioning base-station for anew positioning,so as to realize precise positioning.Eight LED visible light positioning base-stations are arranged in coal mine underground.Positioning precision of the system is tested through five intelligent information mining-lamps moving at normal speed.The results show that positioning error of the system is less than 1 m,which meets precision requirements of personnel positioning in coal mine underground.