本文選題：漏泄波導(dǎo) + 輻射特性　； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：在處于地層深處的礦井巷道內(nèi),通信空間狹窄受限,依靠漏泄電纜的通信系統(tǒng)得到了廣泛應(yīng)用。利用漏泄電纜縱向?qū)б姶挪?同時通過表面的縫隙結(jié)構(gòu)向外輻射電磁波,使巷道內(nèi)部有足夠的無線電磁場,實現(xiàn)移動臺之間或移動臺與基站間的可逆耦合。由于漏泄電纜的一般工作頻率不超過1GHz,無線通信系統(tǒng)數(shù)據(jù)傳輸速率要求越來越高,需要尋求其他傳輸媒介來滿足通信系統(tǒng)的高頻段工作范圍。論文基于漏泄波導(dǎo)工作頻率高、縱向衰減小以及傳輸速率高等優(yōu)點,提出由漏泄波導(dǎo)代替漏泄電纜來構(gòu)建礦井通信系統(tǒng),主要完成了以下幾方面的工作:(1)在漏泄波導(dǎo)縫隙結(jié)構(gòu)的基礎(chǔ)上,提出將漏泄波導(dǎo)應(yīng)用于礦井漏泄通信系統(tǒng)中。根據(jù)礦井巷道內(nèi)部復(fù)雜環(huán)境特點,建立了漏泄波導(dǎo)HFSS仿真分析模型。研究了在復(fù)雜巷道環(huán)境中漏泄波導(dǎo)的輻射特性,通過仿真得出在煤塵層覆蓋、雜質(zhì)結(jié)塊堵塞和內(nèi)部積水影響下,均會對漏泄波導(dǎo)的輻射信號造成不同程度地減小。證明了漏泄波導(dǎo)在礦井通信系統(tǒng)中的應(yīng)用可行性,也為實際安裝提供了建議。(2)為提高由漏泄波導(dǎo)構(gòu)建的通信系統(tǒng)生存性,采用了在主通信線路上配置冗余線路的方法。給出并分析了四種不同冗余方式下的網(wǎng)絡(luò)結(jié)構(gòu),通過仿真對比不同網(wǎng)絡(luò)結(jié)構(gòu)的生存性,將四種冗余結(jié)構(gòu)的優(yōu)缺點進行了對比,發(fā)現(xiàn)采用雙豎井環(huán)形冗余結(jié)構(gòu)或者全冗余備份結(jié)構(gòu)時的系統(tǒng)生存性較高,為實際礦井通信系統(tǒng)的構(gòu)建提供了參考數(shù)據(jù)。(3)研究了漏泄波導(dǎo)通信系統(tǒng)的信道容量。在鏈路預(yù)算的基礎(chǔ)上,將漏泄波導(dǎo)作為有線信道進行分析的方法。使用香農(nóng)信道容量和多種調(diào)制方式下的信道容量來分析通信系統(tǒng)的信道特性,通過漏泄波導(dǎo)和漏泄電纜通信系統(tǒng)傳輸距離以及信噪比與信道容量的關(guān)系進行對比,驗證了漏泄波導(dǎo)在通信系統(tǒng)中的可行性,在傳輸距離以及提供數(shù)據(jù)傳輸率等方面具有優(yōu)越性。論文的上述工作對開發(fā)基于漏泄波導(dǎo)的新型礦井無線通信系統(tǒng)具有實際價值。
[Abstract]:In the mine roadway deep in the stratum, the communication space is limited and the communication system relies on leakage cable is widely used. The leakage cable is used to guide the electromagnetic wave longitudinally and radiate the electromagnetic wave outward through the slot structure of the surface at the same time, so that there is enough wireless electromagnetic field in the tunnel to realize the reversible coupling between mobile stations or between mobile stations and base stations. Since the general operating frequency of leakage cable is not more than 1 GHz, the data transmission rate of wireless communication system is more and more high, so it is necessary to seek other transmission media to meet the high frequency range of communication system. Based on the advantages of high frequency of leakage waveguide, low longitudinal attenuation and high transmission rate, this paper proposes a mine communication system based on leakage waveguide instead of leakage cable. Based on the crevice structure of the leakage waveguide, it is proposed that the leakage waveguide should be applied to the mine leakage communication system. According to the complex environment characteristics of mine roadway, the HFSS simulation analysis model of leakage waveguide is established. The radiation characteristics of leaky waveguide in complex tunnel environment are studied. The simulation results show that under the influence of coal dust cover, impurity clogging and internal water accumulation, the radiation signal of leakage waveguide will be reduced in varying degrees. It is proved that the application of leakage waveguide in mine communication system is feasible, and the advice for practical installation is provided. In order to improve the survivability of the communication system constructed by leakage waveguide, the method of configuring redundant lines on the main communication line is adopted. The network structure under four different redundancy modes is given and analyzed. The advantages and disadvantages of the four redundant structures are compared by simulation and comparison of the survivability of different network structures. It is found that the system with double shaft annular redundancy structure or full redundancy backup structure has higher survivability, which provides reference data for the construction of actual mine communication system. (3) the channel capacity of the leaky waveguide communication system is studied. Based on the link budget, the leaky waveguide is used as the cable channel analysis method. The Shannon channel capacity and the channel capacity under various modulation modes are used to analyze the channel characteristics of the communication system. The transmission distance and the relationship between the SNR and the channel capacity of the leaky waveguide and leaky cable communication system are compared. The feasibility of the leaky waveguide in the communication system is verified, and it has advantages in the transmission distance and the data transmission rate. The above work is of practical value for the development of a new mine wireless communication system based on leaky waveguide.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD655.3;TN92

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