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  本文選題：煤礦井下 + 電磁波特性�。� 參考：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：我國煤炭資源豐富,由于礦井環(huán)境復(fù)雜、事故頻發(fā),提高人員定位精度,對于及時準確地掌握被困人員位置和情況,保證人員安全和煤礦企業(yè)管理非常重要。由于礦井巷道電磁波傳播的特殊性與復(fù)雜性,礦井人員精確定位的實現(xiàn)依然是個難點,而測距是定位的基礎(chǔ),鑒于此,本文研究了一種提高測距精度的多天線RSSI測距的方法。介紹巷道中電磁波的傳輸環(huán)境,分析矩形巷道中電磁波波模模型,導(dǎo)出了電磁波衰減率,仿真出電磁波場強在巷道中的分布特性。通過分析,巷道內(nèi)場強分布在近距離空間上出現(xiàn)快衰落現(xiàn)象,且具有明顯的周期性波動。從削弱場強周期性波動著手,提出多天線測距方法,并做了理論仿真驗證。設(shè)計了多天線測距系統(tǒng),該系統(tǒng)主要包括軟件和硬件兩個方面。確定了RSSI測距模型,采用高斯濾波方法對測得的數(shù)據(jù)進行處理,運用曲線擬合的方法求出測距模型中的參數(shù)因子和衰減因子。最后對單天線和多天線的測距數(shù)據(jù)進行分析比較,得出多天線測距精度高于單天線,且多天線間間距為兩倍波長時,測距精度最高,證明了多天線測距方法的有效性。
[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.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD65

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