本文選題：冗余 + 時(shí)間同步�。� 參考：《中國(guó)科學(xué)院研究生院（國(guó)家授時(shí)中心）》2013年碩士論文

【摘要】：時(shí)間是物理學(xué)的基本參量之一，隨著科學(xué)技術(shù)的發(fā)展，高精度的時(shí)間和頻率在國(guó)民經(jīng)濟(jì)發(fā)展中的地位日趨重要，諸如通信、電力、交通、高速數(shù)字網(wǎng)同步等高新技術(shù)領(lǐng)域有著廣泛的應(yīng)用，特別是在我國(guó)國(guó)防建設(shè)和空間技術(shù)領(lǐng)域[1]，如我國(guó)第二代戰(zhàn)略武器試驗(yàn)、載人航天工程、深空探測(cè)和正在建設(shè)中的我國(guó)二代衛(wèi)星導(dǎo)航系統(tǒng)對(duì)時(shí)間和頻率的精度提出了更高的需求。 要解決國(guó)民經(jīng)濟(jì)建設(shè)和國(guó)防建設(shè)對(duì)精密時(shí)間服務(wù)的需求，首先，我們必須有統(tǒng)一的時(shí)間標(biāo)準(zhǔn)。其次，我們需要有精確的授時(shí)技術(shù)。 隨著授時(shí)技術(shù)的發(fā)展和擴(kuò)展，定時(shí)手段也越來(lái)越多，傳統(tǒng)系統(tǒng)中定時(shí)方式較為單一，不能滿足客戶對(duì)可靠性的需求。因此，多冗余時(shí)間源的研究和應(yīng)用日趨廣泛。 本文提出了一種多冗余時(shí)間服務(wù)終端的設(shè)計(jì)方案，它能夠接收多種定時(shí)信號(hào)，從而實(shí)現(xiàn)了利用多冗余時(shí)間源實(shí)現(xiàn)時(shí)間同步，并通過(guò)串口、秒脈沖、無(wú)線網(wǎng)絡(luò)等多種接口實(shí)現(xiàn)用戶時(shí)間服務(wù)，并具有靈活的人機(jī)交互界面。 在論文章節(jié)安排上，本文首先分析了各種授時(shí)方式的優(yōu)缺點(diǎn)，選擇了衛(wèi)星、CDMA及NTP這三種授時(shí)方式作為外部時(shí)間源，并通過(guò)自動(dòng)和手動(dòng)兩種方式來(lái)實(shí)現(xiàn)時(shí)間源的冗余，分析了各種定時(shí)手段和時(shí)間服務(wù)方式，規(guī)劃了時(shí)間服務(wù)終端的各種功能，，明確了多冗余時(shí)間服務(wù)終端的設(shè)計(jì)方案和研究思路。 其次，根據(jù)系統(tǒng)設(shè)計(jì)目標(biāo)和硬件需求，確定采用功能模塊化的設(shè)計(jì)理念，設(shè)計(jì)完成了多冗余時(shí)間服務(wù)終端的硬件部分，包括系統(tǒng)硬件設(shè)計(jì)分析，器件選型，電路原理圖的相關(guān)介紹，為下一步嵌入式軟件的開(kāi)發(fā)奠定了良好的基礎(chǔ)。 再次，對(duì)多冗余時(shí)間服務(wù)終端的軟件需求和功能進(jìn)行了介紹和分析；設(shè)計(jì)完成了終端相關(guān)的軟件；使用C語(yǔ)言和Keil uVision4開(kāi)發(fā)軟件進(jìn)行軟件的編寫、編譯、仿真和實(shí)現(xiàn)；完成了各功能模塊的程序設(shè)計(jì)、功能仿真和調(diào)試，軟硬件聯(lián)調(diào)測(cè)試的工作。 實(shí)驗(yàn)結(jié)果表明，本系統(tǒng)能夠接收多種時(shí)間源(如GPS、北斗、CDMA網(wǎng)絡(luò)及NTP授時(shí)服務(wù)器)的時(shí)間信息，可為用戶終端提供準(zhǔn)確實(shí)時(shí)的時(shí)間同步服務(wù)，具有一定的工程應(yīng)用價(jià)值，也具有一定的理論研究意義。
[Abstract]:Time is one of the basic parameters of physics. With the development of science and technology, high precision time and frequency are becoming more and more important in the development of national economy, such as communication, electricity, transportation, High-tech fields such as synchronization of high-speed digital networks have been widely used, especially in the fields of national defense construction and space technology in China [1], such as the second-generation strategic weapons test in China, the manned space project, The time and frequency accuracy of the second generation satellite navigation system in deep space exploration and in the process of being built in China has put forward a higher demand. In order to meet the demand of national economy construction and national defense construction for precision time service, first of all, we must have a unified time standard. Second, we need precise timing techniques. With the development and expansion of timing technology, timing methods are more and more, the traditional system timing mode is relatively single, can not meet the needs of customers for reliability. Therefore, the research and application of multiple redundant time sources are becoming more and more extensive. In this paper, a design scheme of multi-redundant time service terminal is proposed, which can receive multiple timing signals, thus realizing time synchronization by using multiple redundant time sources, and using serial port and second pulse. Wireless network and other interfaces realize user time service, and have flexible man-machine interface. In the chapter arrangement, this paper first analyzes the advantages and disadvantages of various timing methods, selects satellite CDMA and NTP as external time sources, and realizes the redundancy of time sources by automatic and manual methods. All kinds of timing methods and time service methods are analyzed, various functions of time service terminal are planned, and the design scheme and research idea of multiple redundant time service terminal are clarified. Secondly, according to the system design objectives and hardware requirements, the design concept of functional modularization is adopted, and the hardware part of the multi-redundancy time service terminal is designed and completed, including system hardware design analysis, device selection. The related introduction of circuit schematic chart lays a good foundation for the next embedded software development. Thirdly, the software requirement and function of multi-redundancy time service terminal are introduced and analyzed, the terminal related software is designed and completed, the software is compiled, simulated and implemented by C language and Keil uVision4. The program design, function simulation and debugging of each function module and the test of hardware and software are completed. The experimental results show that the system can receive time information from many kinds of time sources (such as GPS, BeiDou CDMA network and NTP time server), and can provide accurate and real-time synchronization service for user terminals, and has certain engineering application value. Also has certain theory research significance.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院（國(guó)家授時(shí)中心）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P127.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 鄒紅艷,鄭建勇;基于GPS同步時(shí)鐘的統(tǒng)一校時(shí)方案[J];電力自動(dòng)化設(shè)備;2004年12期

2 宋妍,朱爽;基于NTP的網(wǎng)絡(luò)時(shí)間服務(wù)系統(tǒng)的研究[J];計(jì)算機(jī)工程與應(yīng)用;2003年36期

3 呂超軍;劉幺和;;基于物聯(lián)網(wǎng)Online售票支付系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)[J];計(jì)算機(jī)與數(shù)字工程;2011年03期

4 李明;;網(wǎng)絡(luò)時(shí)間同步系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)[J];價(jià)值工程;2011年19期

5 劉波;;基于嵌入式ARM系統(tǒng)的應(yīng)用分析[J];商場(chǎng)現(xiàn)代化;2010年11期

6 彭珂;GPS和網(wǎng)絡(luò)時(shí)間服務(wù)器技術(shù)[J];有線電視技術(shù);2004年06期

本文編號(hào)：2015253