【摘要】： 光子晶體光纖(PCF)是二十世紀(jì)最新的科技成果之一,PCF的研究與應(yīng)用已經(jīng)成為當(dāng)今世界熱門(mén)的研究領(lǐng)域。尤其是最近十年,世界上對(duì)PCF的研究十分廣泛,已經(jīng)被廣泛地應(yīng)用于光纖通信、光學(xué)器件、醫(yī)學(xué)檢查等各個(gè)方面。但是,PCF的制備方法和它的理論發(fā)展相比,進(jìn)展卻十分緩慢。本文主要是針對(duì)PCF的制備工藝進(jìn)行分析和設(shè)計(jì)。 首先,介紹了PCF的概念、分類(lèi)、特性和制備技術(shù)的發(fā)展等,分別闡述了PCF的各種制備技術(shù)和它們的優(yōu)缺點(diǎn),重點(diǎn)介紹了利用堆積法制備PCF的工藝過(guò)程和生產(chǎn)設(shè)備。 其次,指出了在利用堆積法制備PCF的過(guò)程中存在的問(wèn)題和不足,根據(jù)這些存在的問(wèn)題,對(duì)拉制過(guò)程中的參數(shù)的影響進(jìn)行了分析,并設(shè)計(jì)了一些簡(jiǎn)易的物理裝置安裝在光纖拉制塔上。分析了預(yù)制棒對(duì)PCF的影響,探索了制作預(yù)制棒的幾種方法,設(shè)計(jì)了2種預(yù)制棒排布的輔助裝置,利用這些裝置可以有效地提高預(yù)制棒的排布速率和成功率。 最后,設(shè)計(jì)了一種數(shù)字化的控制系統(tǒng),實(shí)現(xiàn)定長(zhǎng)剪切和自動(dòng)纏繞兩種功能。該系統(tǒng)是一種以西門(mén)子S7-200可編程序控制器作為主控制器,使用霍爾傳感器、電壓變送器進(jìn)行信號(hào)采集,使用CO2激光器進(jìn)行切割,使用電動(dòng)機(jī)進(jìn)行驅(qū)動(dòng)的自動(dòng)控制系統(tǒng)。軟件編程采用梯形圖(LAD)作為編程語(yǔ)言,充分利用了梯形圖中的計(jì)數(shù)器、比較、跳轉(zhuǎn)與標(biāo)號(hào)等功能指令,實(shí)現(xiàn)其控制功能。其中,纏繞部分采用了PID閉環(huán)模擬控制。文章中給出了設(shè)計(jì)方法和系統(tǒng)框圖,包括系統(tǒng)硬件的組態(tài)和軟件的設(shè)計(jì)。對(duì)數(shù)字部分進(jìn)行了實(shí)驗(yàn)仿真,對(duì)PID控制進(jìn)行理論仿真。仿真結(jié)果表明該系統(tǒng)能夠穩(wěn)定運(yùn)行,提高了光纖拉制塔的自動(dòng)化水平。
[Abstract]:Photonic crystal fiber (PCF) is one of the latest scientific and technological achievements in the 20th century. The research and application of PCF has become a hot research field in the world. Especially in the last ten years, PCF has been widely studied in the world and has been widely used in optical fiber communication, optical devices, medical examination and so on. However, the preparation method of PCF and its theoretical development, progress is very slow. In this paper, the preparation process of PCF is analyzed and designed. Firstly, the concept, classification, characteristics and development of PCF are introduced. The preparation techniques of PCF and their advantages and disadvantages are described respectively, and the process and equipment of preparing PCF by stacking are emphasized. Secondly, the problems and shortcomings in the process of preparing PCF by stacking method are pointed out. According to these problems, the influence of the parameters in the drawing process is analyzed. Some simple physical devices are designed and installed on the optical fiber drawing tower. In this paper, the influence of preform rod on PCF is analyzed, several methods of making preform rod are explored, two kinds of auxiliary devices for arranging preform rod are designed, the arrangement rate and success rate of preform rod can be improved effectively by using these devices. Finally, a digital control system is designed to realize the functions of constant length shearing and automatic winding. The system is an automatic control system which uses Siemens S7-200 programmable controller as main controller, uses Hall sensor, voltage transmitter for signal acquisition, CO2 laser for cutting, and motor for driving. In software programming, ladder diagram (LAD) is used as programming language, and its control function is realized by fully utilizing the counter, comparison, jump and label of the counter in trapezoid diagram. Among them, the winding part adopts PID closed loop simulation control. The design method and system block diagram are given, including hardware configuration and software design. The digital part is simulated and the PID control is simulated theoretically. The simulation results show that the system can run stably and improve the automation level of optical fiber drawing tower.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2010
【分類(lèi)號(hào)】：TN253

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