摘要
针对室内一维空间定位存在的问题,提出一个基于LED光的一维定位新方案。该方案首先通过调制灯光信号以区别不同的LED,然后通过测量接收到的LED光信号强度,计算接收信号强度比RSSR并由此确定目标物体的位置。与单纯接收信号强度定位方案相比,该方案调制方法简便,降低了节点对硬件的要求,大大减少了数据的传输量和计算量,缩短了定位时间,降低了能耗,并且能够消除不同LED设备之间的参数差异,使室内定位的精度进一步提高。实验结果表明在1×1×1.25 m3的空间内,该方案定位的平均误差在3 cm以内。
A novel LED location solution based on RSSR for one-dimension space is proposed to solve the problems of electric spark and low measuring precision when traditional wireless location technology is used in mines or tunnels. Firstly, LED lamps are identified by modulated light, the object location is determined by the signal strength ratio which is calculated by the received signal strength. Comparing with the conventional method by using only detected powers, the proposed solution modulation method is simple and can reduce the requirements of nodes for hardware, it also greatly reduces the amount of data transmission and the amount of calculation, shortens the positioning time, reduces the energy consumption, and can eliminate the differences between different LED equipment parameters, and cancell out the noise due to the difference in optical device parameters. The indoor positioning accuracy is further improved by this solution. In the experiment, three LED lamps are identified by time-division multiplexing with room dimensions of 1.0 m × 1.0 m × 1.25 m, and the results show that the mean of the location error is only 3 cm.
出处
《实验室研究与探索》
CAS
北大核心
2015年第4期92-95,共4页
Research and Exploration In Laboratory
基金
国家自然科学基金(61170125)
江苏省高等职业院校国内高级访问学者计划资助项目(编号:2013-FX033)
江苏省教育技术研究所技术应用重点项目(2012-R-22370)
2013年院级课题<校园精确导航与定位系统的设计>(SGK201316)
