本文關(guān)鍵詞： 數(shù)據(jù)采集 信號調(diào)理 高精度 可靠性 回收效率　出處：《中北大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：遙測數(shù)據(jù)采集存儲裝置用來采集并存儲彈上的各類信號,如飛行狀態(tài)數(shù)據(jù)、攝像壓縮數(shù)據(jù)、各種傳感器信號等。隨著科技水平的發(fā)展,科研試驗(yàn)對采集存儲系統(tǒng)的功能多樣性及性能優(yōu)化提出了更高的要求。本文結(jié)合遙測數(shù)據(jù)高精度采集存儲裝置的各項(xiàng)技術(shù)指標(biāo),按照模塊化的思想提出了設(shè)計方案,對設(shè)計中的技術(shù)難點(diǎn)進(jìn)行了分析。首先對運(yùn)算放大器的不穩(wěn)定性分析與優(yōu)化進(jìn)行了研究,設(shè)計了信號調(diào)理濾波電路、高速模擬開關(guān)切換及ADC轉(zhuǎn)換電路;依據(jù)技術(shù)指標(biāo)完成了數(shù)字量傳輸電路和控制開關(guān)轉(zhuǎn)發(fā)電路的設(shè)計;分析了系統(tǒng)中二次電源的功率需求,對二次電源電路進(jìn)行了可靠性研究與設(shè)計。其次,針對設(shè)計中采用的提高采集精度、數(shù)�；旌暇帋�、無線備份數(shù)據(jù)的動態(tài)平衡編幀、實(shí)時數(shù)據(jù)快速數(shù)據(jù)回收等關(guān)鍵技術(shù)了進(jìn)行了詳盡的論述。為了提高采集精度,提出通過FPGA控制ADC對輸入信號進(jìn)行過采樣,然后在FPGA內(nèi)部實(shí)現(xiàn)抽取濾波和求平均值算法,提高了ADC轉(zhuǎn)換分辨率;采用數(shù)模混合及動態(tài)平衡編幀技術(shù)來提高采集存儲的效率和可靠性;分析不同的數(shù)據(jù)回收方式,提出實(shí)時數(shù)據(jù)快速回收的方法,以提高數(shù)據(jù)回收效率。文章最后對過采樣情況下所獲取的樣本數(shù)據(jù)繪制的直方圖和高斯曲線,由MATLAB對樣本的均值、標(biāo)準(zhǔn)差進(jìn)行了計算,驗(yàn)證了采集精度滿足設(shè)計指標(biāo)要求;通過上位機(jī)對回收數(shù)據(jù)的幀結(jié)構(gòu)進(jìn)行了分析驗(yàn)證,證明了數(shù)據(jù)傳輸?shù)目煽啃院屯暾?最后對實(shí)時數(shù)據(jù)兩種不同的回收方式進(jìn)行了分析比較,體現(xiàn)出新方法對回收效率的提高。
[Abstract]:Telemetry data acquisition and storage device is used to collect and store all kinds of signals on the bomb, such as flight state data, video compression data, various sensor signals, etc. With the development of science and technology level. Scientific research experiments put forward higher requirements for the functional diversity and performance optimization of the acquisition and storage system. This paper combines the various technical indicators of the high-precision acquisition and storage device of telemetry data. According to the idea of modularization, the design scheme is put forward, and the technical difficulties in the design are analyzed. Firstly, the instability analysis and optimization of the operational amplifier are studied, and the signal conditioning filter circuit is designed. High speed analog switch switching and ADC conversion circuit; According to the technical specifications, the design of digital transmission circuit and control switch forwarding circuit is completed. The power requirement of secondary power supply in the system is analyzed, and the reliability of the secondary power supply circuit is studied and designed. Secondly, aiming at improving the acquisition accuracy, digital-analog mixed framing is adopted in the design. The key technologies such as dynamic balance framing of wireless backup data and fast data recovery of real-time data are discussed in detail in order to improve the acquisition accuracy. It is proposed that the input signal is oversampled by ADC controlled by FPGA, and then decimated filter and average value algorithm are implemented in FPGA, which improves the resolution of ADC conversion. The efficiency and reliability of acquisition and storage are improved by using digital-analog mixing and dynamic balance framing technology. Different data recovery methods are analyzed, and real-time data recovery methods are proposed to improve the efficiency of data recovery. Finally, the histogram and Gao Si curve of the sample data drawn under the over-sampling situation are analyzed. The mean value and standard deviation of the sample are calculated by MATLAB, and the accuracy of the collection is verified to meet the requirements of the design index. The frame structure of the recovered data is analyzed and verified by the upper computer, and the reliability and integrity of the data transmission are proved. Finally, two different methods of real-time data recovery are analyzed and compared, which shows that the new method can improve the recovery efficiency.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP873

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