【摘要】：利用聲表面波來傳播和處理信號(hào)的技術(shù),稱作聲表面波技術(shù)。聲表面波技術(shù)是將聲學(xué)、電子學(xué)和材料學(xué)有機(jī)結(jié)合的一種新興技術(shù),已被廣泛應(yīng)用于電子通信、雷達(dá)通信、移動(dòng)通信、射頻識(shí)別以及各類傳感系統(tǒng),涉及航空、航天、軍事和民用等多個(gè)領(lǐng)域。本文基于聲表面波氣體傳感器系統(tǒng)的檢測(cè)原理,設(shè)計(jì)并仿真出雙通道聲表面波氣體傳感器系統(tǒng),并分別對(duì)系統(tǒng)中的各功能模塊電路進(jìn)行了詳細(xì)的設(shè)計(jì)與仿真,主要包括模擬電路部分和數(shù)字電路部分。其中,模擬部分主要設(shè)計(jì)特定頻率為318MHz的諧振式振蕩電路和自行制備頻率為300MHz的延遲線型振蕩電路,以及模擬部分信號(hào)處理電路中的帶通濾波電路、低通濾波電路、混頻電路。數(shù)字部分主要進(jìn)行整形電路的設(shè)計(jì)與仿真,基于FPGA的數(shù)字計(jì)頻模塊的設(shè)計(jì)與綜合。本文對(duì)系統(tǒng)各個(gè)功能模塊都做了詳細(xì)的介紹與設(shè)計(jì)仿真,且從仿真結(jié)果看,都達(dá)到了系統(tǒng)的設(shè)計(jì)要求。最后對(duì)兩種形式的系統(tǒng)模擬功能模塊進(jìn)行了集成設(shè)計(jì)與仿真,并對(duì)自激諧振式聲表面波氣體傳感系統(tǒng)的模擬電路部分進(jìn)行了分立元件的集成設(shè)計(jì),得到了聲表面波氣體傳感系統(tǒng)模擬電路部分的集成電路原理圖,為后續(xù)自激聲表面波氣體傳感集成系統(tǒng)制備奠定了基礎(chǔ)。聲表面波器件具有靈敏度高、穩(wěn)定性好、易于微型化和集成化等特點(diǎn),被廣泛應(yīng)用于多類傳感系統(tǒng)中。隨著物聯(lián)網(wǎng)技術(shù)的不斷發(fā)展與應(yīng)用,聲表面波傳感器以其獨(dú)特優(yōu)點(diǎn)發(fā)展前景愈加廣闊,因此本文針對(duì)聲表面波氣體傳感器系統(tǒng)集成設(shè)計(jì)與仿真的研究對(duì)于該類傳感器的實(shí)際應(yīng)用具有重要意義。
[Abstract]:The technique of using saw to propagate and process signals is called saw technology. Surface acoustic wave (saw) technology is an emerging technology that combines acoustics, electronics and materials. It has been widely used in electronic communication, radar communication, mobile communication, radio frequency identification and various sensing systems, including aviation and aerospace. Military and civilian areas and other areas. Based on the detection principle of saw gas sensor system, a dual channel saw gas sensor system is designed and simulated in this paper. It mainly includes analog circuit and digital circuit. Among them, the analog part mainly designs the resonant oscillation circuit with specific frequency 318MHz, the delay linear oscillation circuit with 300MHz frequency, and the bandpass filter circuit, low pass filter circuit and mixing circuit in the analog part of the signal processing circuit. The digital part mainly carries on the design and the simulation of the shaping circuit, and the design and synthesis of the digital frequency module based on FPGA. In this paper, all the function modules of the system are introduced and simulated in detail, and the simulation results show that the design requirements of the system are met. Finally, the integrated design and simulation of two kinds of system simulation function modules are carried out, and the integrated design of discrete components in the analog circuit of the self-excited resonant saw gas sensing system is given. The integrated circuit schematic diagram of the analog circuit of saw gas sensing system is obtained, which lays a foundation for the preparation of self-excited saw gas sensing integrated system. Saw devices are widely used in multi-sensor systems because of their high sensitivity, good stability, easy miniaturization and integration. With the continuous development and application of the Internet of things technology, saw sensors have more and more broad development prospects with their unique advantages. Therefore, the research on the integrated design and simulation of saw gas sensor system in this paper is of great significance for the practical application of this kind of sensor.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP212

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