基于WiFi和计时误差抑制的TOA煤矿井下目标定位方法

针对现有煤矿井下目标定位方法精度不能满足应急救援、井下人员作业管理以及煤矿物联网建设对精确定位的需要，提出基于TOA（Time of Arrival）的煤矿井下目标精确定位方法。针对TOA方法用于目标定位受设备计时误差影响较大，井下巷道呈一维条状分布，无法采用地面常用的二维、三维抑制误差算法，提出基于计时误差抑制的TOA煤矿井下目标定位方法，建立双路WiFi（Wireless Fidelity）信道+单路光纤信道的一维定位方法和信号收发计时方式，在此基础上提出计时误差抑制算法。测试结果证明计时误差抑制算法在采用此定位方法基础上，有效地抑制了设备计时误差造成的测距误差，实测误差不影响定位精度，验证了此方法的定位性能。

TOA underground coal mine target positioning method based on WiFi and timing error suppression

As the precision of the existing target positioning methods for underground coal mine can not meet the requirements of emergency rescue and operation management of underground personnel as well as the requirements for accurate positioning of the construction of coal mine-related internet of things，a precise positioning method based on TOA(Time of Arrival)was proposed.As for the impact from equipment timing errors upon the target positioning by TOA method and the failure of two-dimensional or three-dimensional error suppression algorithms commonly used on the ground due to the one-dimensional strip distribution in the tunnel，the TOA target positioning method for underground coal mine based on timing error suppression was proposed，to establish the one-dimensional positioning method and signal transceiving timing method with two-way WiFi(Wireless Fidelity)channel+one-way fiber channel，and on such basis，the timing error suppression algorithm was put forward.The test results prove that such algorithm based on the positioning method in this paper effectively suppresses the ranging error caused by the equipment timing error，and the actually-measured error does not affect the positioning accuracy，which verifies the positioning performance of this method.