【摘要】：隨著Internet技術(shù)和計(jì)算機(jī)技術(shù)的快速發(fā)展，網(wǎng)絡(luò)化儀表日益顯示出有別于傳統(tǒng)儀表的優(yōu)越性和便易性，成為現(xiàn)代智能儀表的發(fā)展趨勢(shì)。為提高TMSR的安全性，該技術(shù)逐步應(yīng)用于現(xiàn)在反應(yīng)堆中的數(shù)字化分布式儀控系統(tǒng)（DCS）中。 在TMSR的熔鹽回路流量測(cè)量時(shí)，數(shù)字化的超聲流量計(jì)獲得的流量數(shù)據(jù)需要先經(jīng)數(shù)模轉(zhuǎn)換（DAC）成4-20mA模擬量，再經(jīng)PLC的模數(shù)轉(zhuǎn)換（ADC）后才能上傳至DCS網(wǎng)絡(luò)。本文在研制的數(shù)字化時(shí)差法超聲流量計(jì)樣機(jī)的基礎(chǔ)上擴(kuò)展了以太網(wǎng)接口，將超聲流量計(jì)通過(guò)該以太網(wǎng)接口直接接入DCS系統(tǒng)網(wǎng)絡(luò)中。由于到TMSR的回路控制系統(tǒng)采用EPICS（Experimental Physics and IndustrialControl System）開發(fā)，，在系統(tǒng)的上位機(jī)中設(shè)計(jì)采用了相應(yīng)的EPICS數(shù)據(jù)接口，確保數(shù)字超聲流量計(jì)與上位機(jī)之間按照服務(wù)器/客戶端（Client/Server）結(jié)構(gòu)模式進(jìn)行有效通信。 在超聲流量計(jì)網(wǎng)絡(luò)接口設(shè)計(jì)中，采用了DM9000網(wǎng)卡芯片搭建網(wǎng)絡(luò)通信模塊，并使用超聲流量計(jì)本身的數(shù)字信號(hào)控制器（DSC）TMS320F28335作為網(wǎng)絡(luò)通信的控制器。在DSC上開發(fā)了DM9000的驅(qū)動(dòng)程序，并移植了用于嵌入式通信的uIP協(xié)議棧，開發(fā)了實(shí)現(xiàn)數(shù)據(jù)發(fā)送功能的客戶端程序。在上位機(jī)EPICS端，開發(fā)了用于數(shù)據(jù)接收的服務(wù)器程序，并在OPI層設(shè)計(jì)了實(shí)時(shí)流量顯示的界面窗口。另外，在超聲流量計(jì)的超聲信號(hào)處理時(shí)，增加了“Hamming”窗技術(shù)，有效地濾除了超聲信號(hào)中的干擾信號(hào)。 本文設(shè)計(jì)的網(wǎng)絡(luò)通信接口為熔鹽實(shí)驗(yàn)回路中的流量監(jiān)控提供了一個(gè)可靠的解決方案，在精簡(jiǎn)系統(tǒng)結(jié)構(gòu)的同時(shí)實(shí)現(xiàn)了穩(wěn)定可靠的測(cè)量數(shù)據(jù)傳輸，達(dá)到了預(yù)期的設(shè)計(jì)目標(biāo)。
[Abstract]:With the rapid development of Internet technology and computer technology, networked instruments are increasingly showing the superiority and convenience, which is different from the traditional instruments, and has become the development trend of modern intelligent instruments. In order to improve the safety of TMSR, the technology is gradually applied to the digital distributed instrument control system (DCS) in the reactor. In the flux measurement of molten salt loop of TMSR, the flow data obtained by digital ultrasonic Flowmeter need to be converted into 4-20mA analog quantity by digital-analog conversion (DAC), and then transferred to DCS network by PLC analog-to-digital conversion (ADC). In this paper, the Ethernet interface is extended on the basis of the digital moveout ultrasonic Flowmeter prototype, and the ultrasonic Flowmeter is directly connected to the DCS system network through the Ethernet interface. Because the loop control system to TMSR is developed by EPICS (Experimental Physics and IndustrialControl System), the corresponding EPICS data interface is designed in the upper computer of the system. Ensure effective communication between digital ultrasonic Flowmeter and host computer according to server / client (Client/Server) structure. In the design of the network interface of ultrasonic Flowmeter, the DM9000 network card chip is used to build the network communication module, and the digital signal controller (DSC) TMS320F28335 of the ultrasonic Flowmeter itself is used as the controller of network communication. The driver of DM9000 is developed on DSC, the uIP protocol stack for embedded communication is transplanted, and the client program is developed to realize the function of data transmission. The server program for data receiving is developed in the upper computer EPICS, and the interface window for real-time flow display is designed in the OPI layer. In addition, the "Hamming" window technique is added to the ultrasonic signal processing of ultrasonic Flowmeter, which can effectively filter the interference signal from the ultrasonic signal. The network communication interface designed in this paper provides a reliable solution for flux monitoring in molten salt experimental circuit. It can realize stable and reliable measurement data transmission while simplifying the system structure and achieve the expected design goal.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院（上海應(yīng)用物理研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TH814

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