提高煤矿井下RSSI测距精度的方法研究

发布时间：2018-07-03 17:33

本文选题：煤矿井下 + 电磁波特性　；参考：《中国矿业大学》2015年硕士论文

【摘要】：我国煤炭资源丰富,由于矿井环境复杂、事故频发,提高人员定位精度,对于及时准确地掌握被困人员位置和情况,保证人员安全和煤矿企业管理非常重要。由于矿井巷道电磁波传播的特殊性与复杂性,矿井人员精确定位的实现依然是个难点,而测距是定位的基础,鉴于此,本文研究了一种提高测距精度的多天线RSSI测距的方法。介绍巷道中电磁波的传输环境,分析矩形巷道中电磁波波模模型,导出了电磁波衰减率,仿真出电磁波场强在巷道中的分布特性。通过分析,巷道内场强分布在近距离空间上出现快衰落现象,且具有明显的周期性波动。从削弱场强周期性波动着手,提出多天线测距方法,并做了理论仿真验证。设计了多天线测距系统,该系统主要包括软件和硬件两个方面。确定了RSSI测距模型,采用高斯滤波方法对测得的数据进行处理,运用曲线拟合的方法求出测距模型中的参数因子和衰减因子。最后对单天线和多天线的测距数据进行分析比较,得出多天线测距精度高于单天线,且多天线间间距为两倍波长时,测距精度最高,证明了多天线测距方法的有效性。
[Abstract]:Our country is rich in coal resources, because of the complex mine environment and frequent accidents, it is very important to improve the positioning accuracy of personnel in order to grasp the position and situation of trapped persons in time and accurately, and to ensure the safety of personnel and the management of coal mining enterprises. Because of the particularity and complexity of electromagnetic wave propagation in mine roadway, the realization of precise location of mine personnel is still a difficulty, and ranging is the basis of location. In view of this, a multi-antenna RSSI ranging method to improve the accuracy of ranging is studied in this paper. The transmission environment of electromagnetic wave in roadway is introduced, the model of electromagnetic wave mode in rectangular tunnel is analyzed, the attenuation rate of electromagnetic wave is derived, and the distribution characteristic of electromagnetic wave field intensity in roadway is simulated. Through analysis, it is found that the distribution of the field intensity in the roadway appears fast fading phenomenon in the short distance space, and has obvious periodic fluctuation. In order to weaken the periodic fluctuation of field intensity, a multi-antenna ranging method is proposed and verified by theoretical simulation. A multi-antenna ranging system is designed, which includes two aspects: software and hardware. The RSSI ranging model is determined and the Gao Si filtering method is used to process the measured data. The parameter factor and attenuation factor in the ranging model are obtained by curve fitting method. Finally, by analyzing and comparing the ranging data of single antenna and multi-antenna, it is concluded that the precision of multi-antenna ranging is higher than that of single antenna, and the range accuracy is the highest when the distance between multiple antennas is two times wavelength, which proves the effectiveness of multi-antenna ranging method.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD65

【参考文献】