本文關(guān)鍵詞：多聲道多普勒超聲波污水流量測(cè)量技術(shù)研究　出處：《東華理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 多普勒超聲波 多聲道 超聲波衰減 建模與仿真 污水流量測(cè)量

【摘要】：近年來(lái),隨著我國(guó)經(jīng)濟(jì)的飛速發(fā)展,環(huán)境污染問(wèn)題日漸突顯,特別是水資源污染問(wèn)題。為了改善這種現(xiàn)狀,實(shí)現(xiàn)水資源的可持續(xù)利用,需要通過(guò)對(duì)污水排放情況進(jìn)行更加精確的實(shí)時(shí)監(jiān)測(cè),來(lái)評(píng)估水資源利用的環(huán)保水平,因此對(duì)污水流量的計(jì)量技術(shù)提出了新的要求。本文基于超聲波多普勒效應(yīng)理論,建立了污水流量測(cè)量的數(shù)學(xué)模型。推導(dǎo)了超聲波發(fā)射、接收的傳導(dǎo)公式,得出由多普勒頻移值來(lái)獲得流量的數(shù)學(xué)公式;通過(guò)分析管道流場(chǎng)速度分布規(guī)律,進(jìn)行了管道橫截面平均流速加權(quán)修正,完善了多聲道多普勒超聲波污水流量測(cè)量數(shù)學(xué)模型。本文對(duì)多普勒超聲波流量測(cè)量中的相關(guān)理論進(jìn)行了分析研究。通過(guò)MATLAB軟件對(duì)超聲波傳播的散射衰減、熱傳導(dǎo)衰減、粘滯衰減特性進(jìn)行了仿真,得到介質(zhì)的密度、動(dòng)力粘度、超聲波的頻率及散射顆粒半徑等參數(shù)與超聲波總衰減系數(shù)之間的關(guān)系,得出超聲波散射衰減主要影響散射回波信號(hào)的幅值,驗(yàn)證了多普勒法測(cè)量的可行性。針對(duì)超聲波發(fā)射頻率和傳感器的安裝位置進(jìn)行了計(jì)算和分析,為了提高運(yùn)算速度采用了快速傅立葉算法與插值算法這兩種頻率估計(jì)算法。本文詳細(xì)設(shè)計(jì)了多聲道多普勒超聲波污水流量測(cè)量方案。硬件設(shè)計(jì)方面,完成了以DSP為核心的微處理器系統(tǒng)電路、信號(hào)反射與接收電路、通道切換與控制電路、系統(tǒng)電源供電等模塊設(shè)計(jì);軟件設(shè)計(jì)方面,完成了系統(tǒng)監(jiān)控軟件與功能程序設(shè)計(jì)。最后,針對(duì)DFT與FFT算法的運(yùn)算量進(jìn)行了比較,通過(guò)仿真對(duì)算法進(jìn)行了驗(yàn)證。通過(guò)使用插值算法來(lái)進(jìn)一步提高頻率的分辨率,基于DSP硬件加速運(yùn)用FFT算法與插值算法來(lái)分析、處理數(shù)據(jù),以此加快了數(shù)據(jù)的處理效率,提高測(cè)量結(jié)果實(shí)時(shí)性。本文對(duì)系統(tǒng)中信號(hào)的發(fā)射與接收、帶通濾波和混頻電路調(diào)試,驗(yàn)證了系統(tǒng)設(shè)計(jì)滿足多聲道多普勒污水流量測(cè)量的要求。
[Abstract]:In recent years, with the rapid development of China's economy, the problem of environmental pollution has become increasingly prominent, especially the problem of water pollution. In order to improve this situation, we can realize the sustainable use of water resources. More accurate real-time monitoring of sewage discharges is needed to assess the environmental level of water use. Based on the theory of ultrasonic Doppler effect, the mathematical model of sewage flow measurement is established, and the transmission formula of ultrasonic emission and receiving is derived. The mathematical formula for obtaining the flow rate from the Doppler frequency shift value is obtained. Based on the analysis of the velocity distribution of the pipeline flow field, the weighted average velocity of the pipeline cross section is modified. The mathematical model of multi-channel ultrasonic ultrasonic sewage flow measurement is improved. The related theory of Doppler ultrasonic flow measurement is analyzed in this paper. The scattering attenuation of ultrasonic wave propagation is analyzed by MATLAB software. Minus. The properties of heat conduction attenuation and viscosity attenuation are simulated, and the relationship between the density, the dynamic viscosity, the frequency of ultrasonic wave and the radius of scattering particles is obtained. It is concluded that the attenuation of ultrasonic scattering mainly affects the amplitude of scattering echo signal, which verifies the feasibility of Doppler measurement. The frequency of ultrasonic emission and the installation position of sensor are calculated and analyzed. In order to improve the operation speed, two frequency estimation algorithms, fast Fourier algorithm and interpolation algorithm, are adopted. In this paper, the multi-channel Doppler ultrasonic sewage flow measurement scheme is designed in detail. The circuit of microprocessor system based on DSP, the circuit of signal reflection and receiving, the circuit of channel switching and control, the power supply of the system and so on are designed. In software design, the system monitoring software and functional programming are completed. Finally, the computation of DFT and FFT algorithm is compared. The algorithm is verified by simulation. By using interpolation algorithm to further improve the frequency resolution, FFT algorithm and interpolation algorithm are used to analyze and process data based on DSP hardware acceleration. In order to speed up the efficiency of data processing, improve the real-time measurement results. The system signal transmission and reception, bandpass filtering and mixing circuit debugging. It is verified that the design of the system can meet the requirements of multi-channel Doppler sewage flow measurement.
【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X832;TB559

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 任增強(qiáng);李躍忠;錢永安;;超聲污水流量測(cè)量的數(shù)學(xué)建模及影響因素分析[J];山西大同大學(xué)學(xué)報(bào)(自然科學(xué)版);2017年02期

2 李明川;姚軍;葛家理;;滲流力學(xué)進(jìn)展與前沿[J];力學(xué)季刊;2012年01期

3 周利華;修吉平;;時(shí)差式超聲波氣體流量計(jì)的研制[J];儀表技術(shù)與傳感器;2007年06期

4 毛大恒;張?jiān)品?聶朝輝;劉巧紅;鐘掘;;Effects of ultrasonic treatment on structure of roll casting aluminum strip[J];Journal of Central South University of Technology;2007年03期

5 YOSHIOKA Hiroshi,TAKAYAMA Tomotsuka,SERIZAWA Shigeatsu;ADCP application for long-term monitoring of coastal water[J];Acta Oceanologica Sinica;2005年01期

6 李克讓,麻偉巍,陳明;Testing and Analysis of the Speed of Water Jet in Water Jet Looms[J];Journal of DongHua University;2003年01期

7 鄭永剛,謝翠麗;非牛頓流體在圓管中分層流動(dòng)及減阻規(guī)律[J];水動(dòng)力學(xué)研究與進(jìn)展(A輯);2000年03期

8 鄭永剛,謝翠麗,姚澤西;非牛頓流體在圓管中層流-紊流分層流動(dòng)規(guī)律[J];四川大學(xué)學(xué)報(bào)(工程科學(xué)版);2000年03期

9 王子延,吳海波,李昕;超聲多普勒流量計(jì)實(shí)現(xiàn)分區(qū)流速測(cè)量的方法研究[J];西安交通大學(xué)學(xué)報(bào);2000年03期

10 張衛(wèi)東,張圣訓(xùn);超聲換能器驅(qū)動(dòng)電路的設(shè)計(jì)[J];儀表技術(shù)與傳感器;1993年04期

相關(guān)博士學(xué)位論文 前1條

1 羅守南;基于超聲多普勒方法的管道流量測(cè)量研究[D];清華大學(xué);2004年

相關(guān)碩士學(xué)位論文 前10條

1 歐莉;能源在線監(jiān)測(cè)系統(tǒng)中電力信息采集器的設(shè)計(jì)與實(shí)現(xiàn)[D];東華理工大學(xué);2016年

2 吳寧;煤泥綜合利用發(fā)電技術(shù)在黃陵礦區(qū)的應(yīng)用研究[D];西安科技大學(xué);2015年

3 曹譯恒;多聲道超聲波流量計(jì)的設(shè)計(jì)與實(shí)驗(yàn)研究[D];河南工業(yè)大學(xué);2015年

4 張全興;超聲波非均勻介質(zhì)傳播衰減特性研究[D];沈陽(yáng)工業(yè)大學(xué);2015年

5 時(shí)文娟;超聲波流量信號(hào)采集與處理技術(shù)研究[D];西安石油大學(xué);2014年

6 馮宇;基于超聲波的混合介質(zhì)中套管探測(cè)研究[D];哈爾濱工業(yè)大學(xué);2013年

7 胡長(zhǎng)江;基于FPGA的超聲波液體流量計(jì)的設(shè)計(jì)[D];哈爾濱理工大學(xué);2013年

8 陳賢志;超聲波傳播及水處理性能的實(shí)驗(yàn)研究[D];北京工業(yè)大學(xué);2012年

9 高慶;超聲多普勒流量計(jì)信號(hào)處理模塊設(shè)計(jì)[D];電子科技大學(xué);2012年

10 王群;基于ARM與GPRS的污水在線監(jiān)測(cè)系統(tǒng)研究[D];蘭州理工大學(xué);2011年

，

本文編號(hào)：1375978