本文選題：太赫茲　切入點(diǎn)：熱釋電探測(cè)器　出處：《電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：太赫茲波是頻率在0.1~10THz范圍內(nèi)的電磁波,位于微波與紅外之間。正是由于處在電磁波譜的特殊頻段,太赫茲電磁波具有很多特殊的性質(zhì)如透射性、相干性、瞬態(tài)性和低能性等,因而太赫茲電磁波在基礎(chǔ)研究領(lǐng)域、生物醫(yī)學(xué)領(lǐng)域、通信領(lǐng)域、公共安全領(lǐng)域、無(wú)損檢測(cè)以及軍事領(lǐng)域方面都有著非常廣闊的應(yīng)用前景。隨著新技術(shù)、新材料的發(fā)展,太赫茲技術(shù)越來(lái)越受到人們的重視并在國(guó)際范圍內(nèi)掀起了一場(chǎng)太赫茲研究熱潮。盡管人類在太赫茲輻射的研究和認(rèn)識(shí)方面已經(jīng)取得了很大的進(jìn)展,但有關(guān)太赫茲探測(cè)的問(wèn)題仍未得到很好的解決。在以上背景下,本文以32通道熱釋電太赫茲探測(cè)器為主要對(duì)象,采用FPGA(現(xiàn)場(chǎng)可編程門(mén)陣列)作為邏輯控制單元,通過(guò)對(duì)模數(shù)轉(zhuǎn)換芯片AD7490和以太網(wǎng)傳輸芯片DM9000A底層程序的開(kāi)發(fā)設(shè)計(jì),實(shí)現(xiàn)了太赫茲信號(hào)的模數(shù)轉(zhuǎn)換以及高速數(shù)據(jù)傳輸。最后通過(guò)使用微軟MFC基礎(chǔ)類庫(kù)完成了與硬件相對(duì)應(yīng)的太赫茲探測(cè)系統(tǒng)軟件平臺(tái)的開(kāi)發(fā)。具體內(nèi)容如下:論文首先對(duì)熱釋電型太赫茲探測(cè)器的工作原理進(jìn)行了介紹,提出了一種采用機(jī)械減薄雙面拋光工藝和半導(dǎo)體工藝完成基于鉭酸鋰晶體薄膜的32通道線陣列熱釋電太赫茲探測(cè)器制備的方法。其次完成了包含前置放大電路、模數(shù)轉(zhuǎn)換電路、數(shù)據(jù)傳輸電路和FPGA控制電路的太赫茲探測(cè)硬件系統(tǒng)的構(gòu)建,然后通過(guò)對(duì)FPGA進(jìn)行程序開(kāi)發(fā)設(shè)計(jì)完成了相關(guān)芯片底層驅(qū)動(dòng)程序以及系統(tǒng)邏輯的控制。在數(shù)據(jù)傳輸方面通過(guò)對(duì)串口傳輸、PCI-E傳輸和以太網(wǎng)傳輸三種傳輸方案進(jìn)行比較,最終選擇了傳輸速度高、兼容性好、又成本低廉、攜帶方便的以太網(wǎng)傳輸方案作為本系統(tǒng)的數(shù)據(jù)傳輸方案。最后在Visual Studio 2005平臺(tái)下,通過(guò)使用微軟MFC基礎(chǔ)類庫(kù)完成了太赫茲探測(cè)系統(tǒng)軟件的開(kāi)發(fā),實(shí)現(xiàn)了基于以太網(wǎng)UDP協(xié)議下的太赫茲數(shù)據(jù)的接收、操作界面的設(shè)計(jì)、32路太赫茲信號(hào)數(shù)據(jù)的實(shí)時(shí)顯示,并利用雙緩沖繪圖技術(shù)完成了直方圖以及V-T圖像的繪制。在此之后又對(duì)軟件的操作方法和具體功能進(jìn)行了介紹。經(jīng)過(guò)調(diào)試驗(yàn)證,該熱釋電太赫茲探測(cè)系統(tǒng)可以滿足對(duì)太赫茲探測(cè)的要求,并且具有穩(wěn)定性好、成本低廉、可移植性強(qiáng)等特點(diǎn)。
[Abstract]:Terahertz wave is the electromagnetic wave with frequency in the range of 0.1~10THz, which lies between microwave and infrared. Because it is in the special frequency band of electromagnetic wave spectrum, terahertz electromagnetic wave has many special properties such as transmission, coherence, transient and low energy, etc. So terahertz electromagnetic wave has a very broad application prospect in the fields of basic research, biomedicine, communication, public safety, nondestructive testing and military. With the development of new technology and new materials, Terahertz technology has been paid more and more attention to, and a wave of terahertz research has been launched in the international scope. Although human beings have made great progress in the research and understanding of terahertz radiation, However, the problem of terahertz detection has not been solved well. Under the above background, the 32-channel pyroelectric terahertz detector is taken as the main object, and FPGA (Field Programmable Gate Array) is used as the logic control unit. Through the development and design of the bottom program of the ADC chip AD7490 and the Ethernet transmission chip DM9000A, Finally, the software platform of terahertz detection system corresponding to hardware is developed by using Microsoft MFC basic class library. The detailed contents are as follows:. The principle of pyroelectric terahertz detector is introduced. A method of fabricating 32 channel array pyroelectric terahertz detector based on lithium tantalate crystal thin film by mechanical thinning and double side polishing and semiconductor process is presented. The construction of terahertz detection hardware system for data transmission circuit and FPGA control circuit, Then, through the programming of FPGA, the bottom driver of the chip and the control of the system logic are completed. In the aspect of data transmission, the three transmission schemes of serial port transmission PCI-E transmission and Ethernet transmission are compared. Finally, the Ethernet transmission scheme with high transmission speed, good compatibility, low cost and convenient carrying is chosen as the data transmission scheme of this system. Finally, under the platform of Visual Studio 2005, The software of terahertz detection system is developed by using Microsoft MFC basic class library, and the receiving of terahertz data based on Ethernet UDP protocol is realized, and the design of operating interface is used to display 32 channels of terahertz signal data in real time. The histogram and V-T image are drawn by double buffer drawing technology. After that, the operation method and specific function of the software are introduced. The pyroelectric terahertz detection system can meet the requirements of terahertz detection and has the advantages of good stability, low cost and strong portability.
【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】：2015
【分類號(hào)】：O441.4

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相關(guān)期刊論文 前2條

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本文編號(hào)：1647729