發(fā)布時(shí)間：2018-08-08 20:50

【摘要】：質(zhì)譜儀是一種利用荷質(zhì)比分離檢測(cè)物質(zhì)的分析儀器,被廣泛應(yīng)用于能源、制藥、生命科學(xué)和空間探測(cè)等領(lǐng)域。它的工作原理是通過(guò)數(shù)據(jù)采集系統(tǒng)獲取檢測(cè)器的輸出信號(hào),再由計(jì)算機(jī)對(duì)數(shù)據(jù)進(jìn)行分析處理,最后得到完整的質(zhì)譜圖。依據(jù)課題要求,本文從便攜式離子阱質(zhì)譜儀工作原理出發(fā),通過(guò)對(duì)信號(hào)同步控制,數(shù)據(jù)存儲(chǔ)等數(shù)據(jù)采集技術(shù)關(guān)鍵技術(shù)的研究,研制了一套改進(jìn)型的數(shù)據(jù)采集系統(tǒng)。本文將質(zhì)譜數(shù)據(jù)采集系統(tǒng)主要分為控制模塊、信號(hào)處理模塊、數(shù)據(jù)采集模塊、通信模塊�？刂颇K實(shí)現(xiàn)整個(gè)系統(tǒng)的信號(hào)控制,重點(diǎn)研究了按照系統(tǒng)時(shí)序的多信號(hào)同步控制;信號(hào)處理模塊主要實(shí)現(xiàn)對(duì)檢測(cè)器輸出的微弱信號(hào)進(jìn)行電流-電壓轉(zhuǎn)換、放大、濾波等處理使其達(dá)到ADC芯片的采集要求;數(shù)據(jù)采集模塊實(shí)現(xiàn)原始信號(hào)的采集和存儲(chǔ),其中質(zhì)譜數(shù)據(jù)的存儲(chǔ)采用了直接內(nèi)存訪問(wèn)技術(shù)(Direct Memory Access,DMA),該技術(shù)提高了CPU的工作效率,解決了傳輸速率不匹配問(wèn)題;通信模塊采用以太網(wǎng)W5500實(shí)現(xiàn)上層軟件與下位機(jī)的數(shù)據(jù)通信和質(zhì)譜數(shù)據(jù)的傳輸,采用RS-485串口方式實(shí)現(xiàn)分子泵的開(kāi)關(guān)控制和數(shù)據(jù)讀取,W5500滿足了數(shù)據(jù)傳輸帶寬要求,保證了通信的穩(wěn)定性。本文針對(duì)不同模塊分別從硬件、軟件設(shè)計(jì)兩方面進(jìn)行了分析和探索。對(duì)射頻控制信號(hào)、射頻輔助信號(hào)(AC信號(hào))的產(chǎn)生進(jìn)行了實(shí)驗(yàn)驗(yàn)證。本文最后對(duì)各模塊進(jìn)行了硬件測(cè)試和代碼調(diào)試,包括同步時(shí)序控制、射頻信號(hào)控制、信號(hào)的采集和處理及以太網(wǎng)通信等功能。測(cè)試結(jié)果表明,各模塊的信號(hào)輸出穩(wěn)定且精確度高。此外,通過(guò)集成測(cè)試,系統(tǒng)在設(shè)定時(shí)間內(nèi)完成了信號(hào)控制和采集任務(wù),滿足本課題的設(shè)計(jì)要求。
[Abstract]:Mass spectrometer (MS) is a kind of analytical instrument which uses the ratio of charge to mass to separate and detect substances. It is widely used in the fields of energy, pharmacy, life science and space exploration. Its working principle is to obtain the output signal of the detector through the data acquisition system, then analyze and process the data by the computer, and finally obtain the complete mass spectrogram. According to the requirements of the project, a set of improved data acquisition system is developed based on the working principle of portable ion trap mass spectrometer and the research on the key technology of data acquisition such as signal synchronization control and data storage. In this paper, the mass spectrum data acquisition system is divided into control module, signal processing module, data acquisition module, communication module. The control module realizes the signal control of the whole system, focusing on the multi-signal synchronization control according to the time sequence of the system, the signal processing module mainly realizes the current-voltage conversion and amplification of the weak signal output by the detector. The data acquisition module realizes the acquisition and storage of the original signal, in which the direct memory access technology (Direct Memory) is used to store the mass spectrum data, which improves the efficiency of the CPU. The communication module uses Ethernet W5500 to realize the data communication between the upper software and the lower computer and the transmission of mass spectrum data. The switch control and data reading W5500 of molecular pump are realized by RS-485 serial port mode, which meet the requirement of data transmission bandwidth and ensure the stability of communication. In this paper, the hardware and software design of different modules are analyzed and explored. The generation of radio frequency control signal and radio frequency auxiliary signal (AC signal) is verified experimentally. Finally, the hardware test and code debugging of each module are carried out, including synchronous timing control, RF signal control, signal acquisition and processing, Ethernet communication and other functions. The test results show that the signal output of each module is stable and accurate. In addition, through the integrated test, the system completes the task of signal control and acquisition in the set time, which meets the design requirements of the subject.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP274.2;TH843

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊金宙;徐東明;王艷;;基于FPGA的高速數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)[J];中國(guó)集成電路;2017年Z1期

2 羅燕萍;;質(zhì)譜技術(shù)在臨床微生物實(shí)驗(yàn)室中的應(yīng)用前景[J];檢驗(yàn)醫(yī)學(xué);2015年02期

3 馬雪佳;譚超;楊先衛(wèi);魯廣鐸;羅志會(huì);許云麗;潘禮慶;鄭勝;趙華;;基于離子阱原理的空間小型質(zhì)譜儀理論模擬研究[J];質(zhì)譜學(xué)報(bào);2015年02期

4 杜鵬;陶洪鑄;高保成;張勇;郭凌旭;晏亮;溫昭琦;陳清山;;面向多應(yīng)用的通用數(shù)據(jù)采集技術(shù)方案[J];電力系統(tǒng)自動(dòng)化;2015年01期

5 趙南;羅華;魏琦;楊華中;;A 14-bit 100-MS/s 85.2-dB SFDR pipelined ADC without calibration[J];Journal of Semiconductors;2014年07期

6 殷廣冬;王建立;孟浩然;萬(wàn)宏;;微弱信號(hào)的高精度數(shù)據(jù)采集系統(tǒng)[J];計(jì)算機(jī)系統(tǒng)應(yīng)用;2014年03期

7 ;Application of analytical instruments in pharmaceutical analysis[J];Journal of Pharmaceutical Analysis;2014年01期

8 YANG Lei;LIN Hu;ZHENG Liaomo;YUE Dongfeng;GAO Tianrong;WANG Feng;;Real-time Synchronization Method Based on Dual Ring Fieldbus in CNC System[J];Chinese Journal of Mechanical Engineering;2014年01期

9 李娟;任路靜;孫冠男;黃和;;氣相色譜-質(zhì)譜聯(lián)用技術(shù)及其在代謝組學(xué)中的應(yīng)用[J];生物工程學(xué)報(bào);2013年04期

10 錢(qián)科威;許永輝;劉勁松;;基于DSP/BIOS的數(shù)據(jù)采集系統(tǒng)研制[J];現(xiàn)代電子技術(shù);2012年20期

相關(guān)碩士學(xué)位論文 前3條

1 戴群雄;基于DSP的小型質(zhì)譜儀主控系統(tǒng)研究[D];哈爾濱工業(yè)大學(xué);2009年

2 趙星星;嵌入式實(shí)時(shí)操作系統(tǒng)移植技術(shù)研究與應(yīng)用[D];電子科技大學(xué);2007年

3 朱萍;四極質(zhì)譜計(jì)數(shù)據(jù)采集及處理系統(tǒng)的設(shè)計(jì)[D];東南大學(xué);2004年

，

本文編號(hào)：2173001