摘要
搭建了室内可见光定位系统,实验上探索了接收信号强度比定位算法的可行性。通过控制多个LED光源在不同时隙的亮暗,分别传输直流与正弦信号,使用照度计及光电探测器测试接收信号强度,对接收机位置进行了估计。其中使用直流信号时,在与光源所在平面相距59cm的接收平面内,得到最大误差为2.05cm、平均误差为8.64mm的定位精度;使用正弦信号时,在与光源平面相距30cm的接收平面内,得到最大误差为1.09cm、平均误差为5.6mm的定位精度,并且使用交流信号时实验结果不受环境杂散光的干扰。
An indoor visible light localization system was set up, and the algorithm of received signal strength ratio was explored by experiments. With multiple LED light sources in different time intervals, the DC or sine waves were transmitted. Positions of receivers, including illuminometer or photodetector, are estimated using the received signals. In the receiver plane which is 59 cm away from the LED plane, an accuracy with a maximum error of 2.05 cm and an average error of 8. 64 mm is achieved by utilizing DC signals, and in a distance of 30 cm, an accuracy with a maximum error of 1.09 cm and an average error of 5. 6 mm were obtained by using sine wave signals. When using sine wave signals, the results are independent of ambient light.
出处
《半导体光电》
CAS
北大核心
2015年第1期141-144,149,共5页
Semiconductor Optoelectronics
基金
国家“973”计划项目(2013CB329205)
国家自然科学基金项目(61375083)
关键词
室内定位
可见光
接收信号强度比算法
定位精度
indoor localization
visible light
LED
received signal strength ratio algorithm
location accuracy
