摘要
针对煤矿井下工作面非常规型光通信空间,使用空间均匀分割法,设计了两种具体的分布式光源布局方案.在使用LED数目和功率相等的条件下,对同一等高平面无线光信号覆盖均匀性进行了定量分析,并分析了可见光接收平面高度变化时光信号均匀性变化规律,提出边缘功率修正法增加边缘LED功率改进光接收平面光信号均匀性的方法.结果表明:该方法可显著提高光信号均匀效果,接收面光信号标准差降低到原来的43%.这一理论在实际应用中无须变化LED光源位置,仅改变光源功率即可实现高均匀性光信号覆盖.
As for the unconventional communication space of the working face underground coal mine, this study used the space uniform segmentation method to design two specific distributed light source layout schemes. Under the same condition of equal number of LEDs and the pow- er, the study quantitatively analyzed the wireless light coverage uniformity on the same height, and discussed the light signal variation regularity with the changing of receiving surface alti- tude. Based on above analysis, this paper proposes the edge power correction method in order to increase the LED edge power and improve the uniformity of receiving light signal. The re- suits show that the light uniformity obviously increased in simulation experiment, and the light signal SD of receiving surface reduced to 43%. In practical application, this method could heighten light coverage uniformity only needing the change of LED light power distribution without needing the change of light source positions.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2014年第2期333-338,共6页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(51204177)
江苏省高校自然基金项目(12KJB120002)
江苏高校优势学科建设工程项目
关键词
可见光通信
光源设计
照度分布
信噪比
边缘功率修正法
visible light communication
light source design
illumination distribution
signal- to-noise ratio
edge power correction method
