CBTC系統(tǒng)在隧道情景下無(wú)線通信干擾的研究
本文關(guān)鍵詞:CBTC系統(tǒng)在隧道情景下無(wú)線通信干擾的研究 出處:《華南理工大學(xué)》2014年碩士論文 論文類型:學(xué)位論文
更多相關(guān)文章: CBTC WLAN 便攜式WIFI 干擾測(cè)試
【摘要】:目前,我國(guó)北京、上海、廣州、深圳等一線城市在現(xiàn)有基礎(chǔ)上繼續(xù)加快城市軌道交通的建設(shè),一些二三線城市也積極籌備上馬城市軌道交通建設(shè);而CBTC系統(tǒng)由于具備技術(shù)先進(jìn)、兼容性強(qiáng)、運(yùn)輸能力強(qiáng)等特點(diǎn),成為各地城市軌道交通新建線路列車控制系統(tǒng)的首選。但是由于城市軌道交通隧道內(nèi)電磁環(huán)境的復(fù)雜性,一些外來(lái)信號(hào)易對(duì)CBTC系統(tǒng)造成干擾,對(duì)城市軌道交通的正常、安全運(yùn)營(yíng)造成影響。 本文結(jié)合廣州地鐵開(kāi)展的CBTC系統(tǒng)干擾測(cè)試,對(duì)CBTC系統(tǒng)的干擾測(cè)試進(jìn)行研究和總結(jié)。論文首選介紹了移動(dòng)閉塞原理、CBTC系統(tǒng)的組成及功能、闡述CBTC系統(tǒng)三種無(wú)線覆蓋方式、使用的無(wú)線局域網(wǎng)技術(shù)及其無(wú)線信道。 其次,針對(duì)無(wú)線電磁波在隧道中的傳播特點(diǎn)及隧道內(nèi)分布的無(wú)線頻段,分析CBTC系統(tǒng)無(wú)線干擾的原因,借助WLAN信道間干擾因子對(duì)PIDS系統(tǒng)及便攜式WIFI對(duì)CBTC系統(tǒng)干擾影響程度進(jìn)行分析。 最后,根據(jù)無(wú)線干擾理論分析,對(duì)隧道情景下便攜式WIFI設(shè)備對(duì)CBTC系統(tǒng)天線、波導(dǎo)管和漏纜等三種無(wú)線覆蓋方式的無(wú)線干擾進(jìn)行現(xiàn)場(chǎng)測(cè)試及分析,并對(duì)比分析干擾對(duì)上述三種無(wú)線覆蓋方式傳輸性能的影響。 本文僅集中于目前城市軌道交通隧道情景的無(wú)線電磁環(huán)境進(jìn)行分析研究,尚有不少挑戰(zhàn)性的課題有待研究,如商用WLAN引入及2.3GHz頻段TDD LTE信號(hào)引入后對(duì)CBTC系統(tǒng)的干擾等等,都值得今后繼續(xù)深入研究。
[Abstract]:At present , the first - tier cities such as Beijing , Shanghai , Guangzhou and Shenzhen continue to speed up the construction of urban rail transit on the existing basis , and some of the second - third - line cities are actively preparing for the construction of urban rail transit in the city . However , the CBTC system is the first choice for the construction of the new line train control system for urban rail transit in various places due to the advanced technology , strong compatibility and strong transport capacity . However , due to the complexity of the electromagnetic environment in the urban rail transit tunnel , some foreign signals can easily interfere with CBTC system , and have an impact on the normal and safe operation of urban rail transit . This paper studies and summarizes the interference test of CBTC system based on the interference test of CBTC system in Guangzhou Metro . The paper introduces the principle of moving block , the composition and function of CBTC system , expounds the three wireless coverage methods of CBTC system , the wireless local area network technology and its wireless channel . Secondly , aiming at the propagation characteristics of wireless electromagnetic waves in the tunnel and the wireless frequency bands distributed in the tunnel , the causes of the wireless interference of the CBTC system are analyzed , and the interference influence degree of the CBTC system is analyzed by means of the interference factors between the WLAN channels . Finally , according to the wireless interference theory analysis , the wireless interference of three kinds of wireless coverage modes , such as antenna , waveguide and leaky cable of CBTC system , is tested and analyzed in the tunnel scene , and the influence of interference on the transmission performance of the above three wireless coverage modes is compared . This paper focuses on the analysis and research on the radio magnetic environment of the current urban rail transit tunnel situation . There are still many challenging topics to be studied , such as the introduction of commercial WLAN and the interference of the CBTC system after the introduction of the 2.3 GHz frequency band TDD LTE signal , and so on .
【學(xué)位授予單位】:華南理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TN92;TN972
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