Abstract：Aiming at the problems of low positioning accuracy and vulnerability to interference in underground environment, an improved personnel positioning algorithm based on ultra-wideband technology in coal mine is proposed. When the arrival time ranging algorithm is used in traditional ultra-wideband positioning, the non-line-of-sight propagation process will lead to large ranging error and poor robustness. The accuracy of the positioning system is improved by the extended Kalman filter algorithm. The experimental results show that the extended Kalman filter method can effectively improve the positioning accuracy of ultra-wideband positioning system in line-of-sight and non-line-of-sight conditions, reduce the accidental error of the system and meet the positioning requirements of coal mine personnel.
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