福彩3d跨度走势图带连线:乐彩网3d试机号分析预测

打賞

ZPW-2000A軌道電路移頻信號的檢測與去噪處理+程序

時間:2019-05-24 22:51來源:畢業論文
以電氣化區段軌道電路中較為常用的25Hz交流計數信號和ZPW-2000A無絕緣移頻軌道電路信號為例,對這兩種信號進行分析研究。由于現場環境下有各種干擾源的存在

摘要:城市軌道交通行車密度大、間隔短、速度快,軌道電路的移頻信號對保障行車安全發揮了重要作用。隨著我國列車速度的不斷提高,鐵路運輸能力逐年增強,鐵路在我國國民經濟生活中的作用越來越重要。為確保鐵路運輸的安全暢通,如何精確快速的檢測軌道電路移頻信號成為一個重要課題。35690
目前,我國電氣化區段的軌道電路有25Hz交流計數電碼軌道電路和75Hz交流計數電碼軌道電路以及移頻軌道電路多種制式共存。本文以電氣化區段軌道電路中較為常用的25Hz交流計數信號和ZPW-2000A無絕緣移頻軌道電路信號為例,對這兩種信號進行分析研究。由于現場環境下有各種干擾源的存在,本文首先對這兩種信號進行時域和頻域上的分析,并分析干擾信號的噪聲來源,利用小波分析方法對25Hz交流計數信號和ZPW-2000A無絕緣移頻軌道信號進行降噪處理和檢測。從仿真結果可以看出,小波分析檢測交流計數信號的誤差小、抗干擾能力強,利用這種方法可以有效地克服傳統方法0、1閾值很難選取的缺點,并能得到上下邊頻利用小波檢測分析這兩個信號的方法,這對提高鐵路信號的檢測準確性地具有重要的現實意義。
關鍵字: 軌道電路;移頻信號;小波變換 ;降噪;信號檢測

Track Circuit Frequency Shift Signal Detection and Processing
Abstract:Traffic density of city rail traffic, interval is short, fast, play an important role in frequency shift track circuit to ensure the safety. With the continuous improvement of train speed in our country, the railway transport capacity increase year by year, the railway in our country is becoming more and more important role in the lives of the national economy. In order to secure safety and smoothness of railway transport, how accurate, rapid detection of track circuit frequency shift signal has become an important subject.   源`自*六)維[論*文'網乐彩网3d试机号分析预测 www.tkscy.icu
At present, there are many formats of track circuit in the electrified section in China, such as 25Hz AC counting signal, 75Hz AC counting signal, frequency-shift keying track circuits. As the track circuit of 25Hz AC counting signal and ZPW-2000A non-insulated frequency-shift keying track circuit is used widely in electrified section, this paper take  them as example. As there are various sources of interference in the field environment, this paper firstly analyze these two signals both in time domain and frequency domain, secondly use the theory of wavelets transformation theory to de-noise the noise-signal, finally analyze the signal of 25Hz AC counting signal and frequency-shift keying track circuits. From the simulation results can be seen that the wavelet analysis of signal detection AC counting error is small, strong anti-jamming capability, using the method to overcome the shortcomings of traditional methods 0,1 threshold is difficult to select, and get below the frequency of using wavelet the analysis has important practical significance and practical value of these two signal detection methods to improve the accuracy of the railway signal detection.
Key words:  Track circuit, Wavelets transform, AC counting signal, De-noise, Signal detecting
 目  錄
1    緒論    1
1.1    鐵路信號系統發展概況    1
1.2    軌道電路的介紹    1
1.3    軌道移頻信號檢測技術的現狀    2
2    軌道電路移頻信號的建模    3
2.1    軌道電路    3
2.1.1    軌道電路工作原理    3
2.1.2    軌道電路作用和技術要求    4 源`自*六)維[論*文'網乐彩网3d试机号分析预测 www.tkscy.icu
2.2    軌道移頻信號    4
2.2.1    25Hz交流計數信號的時域分析    4 ZPW-2000A軌道電路移頻信號的檢測與去噪處理+程序://www.tkscy.icu/tongxin/20190524/33744.html
------分隔線----------------------------
推薦內容
天天乐百人炸金花棋牌 现在开什么实体店赚钱 时时彩平刷稳赚原理 福中心老时时 keno100技巧 查询时时彩历史数据 分分彩下载 广东时时11选五胆拖 11选5任3技巧 稳赚 2013大乐透全部走势图 现金龙虎平台 福彩快三技巧规律 篮球比分直播 双色球胆拖计算方法 北京pk赛车直播开奖视频 幸运飞艇买法