本文選題：數(shù)字存儲(chǔ)示波器(DSO) + 模數(shù)轉(zhuǎn)換器(ADC)　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：示波器是電子工程師的眼睛,是使用最廣泛的測(cè)量?jī)x器。選擇示波器作實(shí)踐教學(xué)系統(tǒng),幫助儀器專業(yè)的學(xué)生了解儀器系統(tǒng)的構(gòu)成,硬件設(shè)計(jì)的關(guān)鍵模塊,儀器互連的接口技術(shù),有很強(qiáng)的現(xiàn)實(shí)意義。本課題圍繞“示波器實(shí)踐教學(xué)系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)”主題,基于典型數(shù)字存儲(chǔ)示波器結(jié)構(gòu),提供了一套可聯(lián)機(jī)調(diào)試的示波器實(shí)踐教學(xué)實(shí)驗(yàn)板,該實(shí)驗(yàn)板具有:信號(hào)通道調(diào)理電路,觸發(fā)電路,數(shù)據(jù)采集電路,DSP處理器,網(wǎng)絡(luò)接口。通過(guò)該實(shí)踐教學(xué)系統(tǒng)不僅可以幫助學(xué)生學(xué)習(xí)綜合應(yīng)用本科所學(xué)的數(shù)字電路,模擬電路,微機(jī)原理相關(guān)知識(shí),更重要的可以幫助學(xué)生建立現(xiàn)代測(cè)量?jī)x器系統(tǒng)的概念,建立網(wǎng)絡(luò)化自動(dòng)測(cè)試系統(tǒng)的概念。在設(shè)計(jì)該實(shí)踐教學(xué)系統(tǒng)時(shí),系統(tǒng)原型參照當(dāng)前典型示波器指標(biāo),適當(dāng)降低其實(shí)現(xiàn)難度。系統(tǒng)的信號(hào)調(diào)理通道由無(wú)源衰減網(wǎng)絡(luò)、阻抗變換、可控運(yùn)算放大和帶寬限制等電路組成,通過(guò)系統(tǒng)中該電路模塊,學(xué)生可進(jìn)行信號(hào)調(diào)理通道特性相關(guān)實(shí)驗(yàn);觸發(fā)電路包括衰減網(wǎng)絡(luò)、耦合方式選擇、邊沿觸發(fā)、視頻觸發(fā)等,通過(guò)該電路可進(jìn)行觸發(fā)通道特性相關(guān)實(shí)驗(yàn);該系統(tǒng)使用可控采樣芯片進(jìn)行數(shù)據(jù)采集,可根據(jù)需要實(shí)時(shí)切換采樣芯片工作模式,通過(guò)該電路可進(jìn)行采樣數(shù)據(jù)校準(zhǔn)實(shí)驗(yàn)和多種數(shù)據(jù)采集模式的實(shí)驗(yàn);系統(tǒng)采用可編程邏輯芯片實(shí)現(xiàn)示波器采集系統(tǒng),通過(guò)該部件可進(jìn)行數(shù)字邏輯系統(tǒng)設(shè)計(jì)試驗(yàn);使用以DSP為處理器的嵌入式系統(tǒng)來(lái)進(jìn)行采樣數(shù)據(jù)分析處理,通過(guò)對(duì)該處理器編程試驗(yàn),可培養(yǎng)學(xué)生嵌入式軟件系統(tǒng)設(shè)計(jì)能力;該系統(tǒng)引入基于網(wǎng)口的儀器擴(kuò)展功能,提供可操作的遠(yuǎn)程控制命令接口,學(xué)生可在該接口硬件平臺(tái)下,設(shè)計(jì)并驗(yàn)證儀器程控功能;更進(jìn)一步,可在實(shí)驗(yàn)板上實(shí)現(xiàn)自動(dòng)測(cè)試系統(tǒng)中LXI-C類儀器所需的Web服務(wù)器,幫助學(xué)生掌握B-S網(wǎng)絡(luò)程序設(shè)計(jì)。系統(tǒng)提供了各實(shí)驗(yàn)的參考設(shè)計(jì),并全部驗(yàn)證通過(guò)。
[Abstract]:Oscilloscopes are the eyes of electronic engineers and are the most widely used measuring instruments. It is of great practical significance to choose oscilloscope as the practical teaching system to help the students of instrument major to understand the composition of instrument system, the key module of hardware design and the interface technology of instrument interconnection. Based on the typical digital storage oscilloscope structure, a set of on-line debugging oscilloscope practical teaching experimental board is provided in this paper. The experimental board has the following functions: signal channel conditioning circuit. Trigger circuit, data acquisition circuit DSP processor, network interface. The practical teaching system can not only help students learn the related knowledge of digital circuit, analog circuit and microcomputer principle, but also help students to establish the concept of modern measuring instrument system. The concept of networked automatic test system is established. When designing the practical teaching system, the prototype of the system can be reduced by referring to the typical oscilloscope index. The signal conditioning channel of the system is composed of passive attenuation network, impedance transformation, controllable operation amplification and bandwidth limitation. Through this circuit module, students can carry out experiments on the characteristics of signal conditioning channel. The trigger circuit includes attenuation network, coupling mode selection, edge trigger, video trigger and so on. The working mode of the sampling chip can be switched in real time according to the need, the calibration experiment of sampling data and the experiment of various data acquisition modes can be carried out by this circuit, and the system uses programmable logic chip to realize the acquisition system of oscilloscope. The digital logic system design experiment can be carried out through this part, the embedded system with DSP as the processor can be used to analyze and process the sampling data, and the students' embedded software system design ability can be cultivated through the programming experiment of the processor. The system introduces the extended function of the instrument based on the network port and provides an operable remote control command interface. Students can design and verify the program control function of the instrument under the hardware platform of the interface. The Web server needed for LXI-C type instruments in the automatic test system can be realized on the experimental board, which can help students master B-S network programming. The system provides the reference design of each experiment, and verifies it all.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM935.3-4;G642

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