【作者】 刘畅；

【导师】 谢磊；

【作者基本信息】 南京大学 ， 计算机技术（专业学位）， 2016， 硕士

【摘要】 目前,传统的室内定位方案主要是利用以WiFi或蓝牙为基础的定位方案。这些方案需要提前部署额外的辅助定位设施,例如WiFi AP和蓝牙Beacon。这就意味着这些室内定位方案在不具有这些定位设施辅助的环境中具有一定的不可扩展性。在本文中,我们提出FootStep-Tracker,一种室内无锚节点的定位方案。完全依靠嵌入在用户鞋子中的传感器芯片感知的传感器数据,包括加速度数据和陀螺仪数据,FootStep-Tracker就可以精确的感知用户的行走轨迹,包括行走距离和行走方向。更近一步,通过感知用户的行为,例如上下楼梯和乘坐电梯,FootStep-Tracker可以有效地将用户当前的位置与室内地图中参考地点,例如楼梯、电梯的位置建立关联。进而再通过室内地图中固有的拓扑限制,将相对的用户行为轨迹确定为在室内地图中绝对的用户位置。真实环境下的实验表明,在没有任何定位设施的辅助下,FootStep-Tracker在室内环境中平均情况下可以达到lm左右的定位准确性。更多还原

【Abstract】 Currently,conventional indoor localization schemes mainly leverage WiFi-based or Bluetooth-based schemes to locate the users in the indoor environment.These schemes require to deployment the infrastructures such as the WiFi APs and Blue-tooth beacons in advance to assist indoor localization.This property hinders the indoor localization schemes in that they are not scalable to any other situations without these infrastructures.In this paper,we propose Footstep-Tracker,an anchor-free indoor localization scheme purely based on sensing the user’s footsteps.By embedding the tiny SensorTag into the user’s shoes,Footstep-Tracker is able to accurately perceive the user’s mov-ing trace,including the moving direction and distance,by leveraging the accelerom-eters and gyroscopes.Furthermore,by detecting the user’s activities such as ascend-ing/descending the stairs and taking an elevator,FootStep-Tracker can effectively cor-relate with the specified positions such as stairs and elevators,and further determine the exacted moving traces in the indoor map by leveraging the space constraints in the map.Realistic experiment results show that,FootStep-Tracker is able to achieve an average localization accuracy of 1m for indoor localization,without any infrastructures having been deployed in advance.更多还原