摘要
分析并指出电磁波非视距传播时延造成的测距误差是影响矿井定位精度的主要原因,针对基于到达时间的矿井目标定位方法,提出了一种能量检测非视距误差抑制方法。该方法通过实测矿井巷道信道特征,统计分析得出直达路径的门限值和信号截取的时间长度,构造相应的鉴别参量,在截取的信号段中提取直达路径能量块的到达时间,以此鉴别出非视距信号。测试结果表明,该方法能够达到较高的测距和定位精度。
It was analyzed and pointed out that distance ranging error caused by non line-of-sight transmission delay of electromagnetic wave was the main reason of reducing mine location precision. For mine target location method based on time of arrival, a non line-of sight error suppression method based on energy detection was proposed. In the method, threshold of direct path and length of signal intercept time are analyzed and counted by testing channel characteristics of coal mine tunnel. In order to identify non line-of-sight signal, arrival time of direct path energy blocks is presented in extracted signal segment by constructing corresponding identification parameters. The experimental testing result shows the method achieves higher range and location precision.
出处
《工矿自动化》
北大核心
2015年第6期78-82,共5页
Journal Of Mine Automation
基金
国家自然科学基金重点资助项目(51134024)
国家自然科学基金资助项目(U1261125)
国家高技术研究发展计划(863计划)资助项目(2012AA062203)
关键词
矿井
目标定位
测距
基于到达时间
非视距误差
位置估算
能量检测
mine
target location
ranging
rime of arrival
non line-of-sight error
locationestimation
energy detection
