摘要
针对现有信号强度测距法计算误差较大的问题,研究射频天线性能参数对电磁波传输的影响,提出将天线阻抗特性与能量接收相联系,将水平极化衰减率应用于求解天线回路上任意微分长度元的电磁波功率密度,从而建立了符合井下射频天线特性的信号能量与传输距离的关系式,推导出求解井下基站与目标之间距离的改进型信号强度测距法。选取相同的巷道环境验证了算法改进前后对目标的定位能力,结果表明经过改进后算法得出的目标位置与改进前相比更加准确,定位误差缩小6.9 m2,且改进后算法与改进前相比大幅减少全巷道内基站的布设数量,提高了基站的利用率,充分证明提出的改进型信号强度测距法更加适合井下巷道中的目标测距及定位,计算结果更加准确可靠。
Regarding to the problems of current signal strength ranging algorithm with big calculation error, the effect of radio frequency antenna performance parameters on the electromagnetic wave transmission was researched and pro- posed to connect the antenna impedance characteristic with the energy receiving. Applied the horizontal polarization decay rate to solve the electromagnetic wave power density for antenna loop length of any differential element, thereby established the relationship formula of the signal energy and the transmission distance in accordance with the charac- teristics of underground radio frequency antenna. Derived the improved signal strength ranging algorithm for solving the distance between underground base station and the target. Selected the same roadway environment to validate the target position capability of the algorithm before and after improvement. The results indicate that the target position obtained from which through the algorithm after improvement is more accurate than before. The position error reduces 6.9 m2, and substantial reduction occurs in the number of base station. The utilization rate of the base station has been im- proved, which fully evidencing the improved signal strength ranging algorithm proposed in this paper is more appropri- ate for target ranging and positioning in underground tunnels, and the position result is more accurate and reliable.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第11期2072-2076,共5页
Journal of China Coal Society
基金
国家自然科学基金重点资助项目(51134024)
国家高技术研究发展计划(863)资助项目(2012AA062203)
关键词
矿井
改进型信号强度测距法
天线阻抗特性
电磁衰减率
测距定位
mine
improved signal strength ranging algorithm
antenna impedance characteristic
electromagnetic decay rate
ranging and positioning
