畢業(yè)設(shè)計(jì)論文-管道液體流速在線測(cè)量系統(tǒng)設(shè)計(jì)(已修改)
2025-06-18 01:27 本頁面
【正文】 提供全套畢業(yè)論文圖紙，歡迎咨詢 鹽 城 師 范 學(xué) 院 畢業(yè)論文 2021－ 2021 學(xué)年度 管道液體流速在線測(cè)量系統(tǒng)設(shè)計(jì) 學(xué)生姓名 學(xué) 院 物電學(xué)院 專 業(yè) 電子信息工程 班 級(jí) 09（ 3）班 學(xué) 號(hào) 092232306 指導(dǎo)教師 2021年 05 月 20日 鹽城師范學(xué)院畢業(yè)論文（設(shè)計(jì)） 1 管道液體流速在線測(cè)量系統(tǒng)設(shè)計(jì) 摘 要 在科技飛速發(fā)展的當(dāng)今社會(huì)，流速測(cè)量廣泛應(yīng)用于工農(nóng)業(yè)和醫(yī)學(xué)，管道液體流速的測(cè)量是液體流速測(cè)量的一個(gè)方面的應(yīng)用。管道流速測(cè)量主要利用超聲波多普勒效應(yīng)測(cè)量 ， 入射波和反射波的頻差來進(jìn)行流速的測(cè)定， 當(dāng)超聲波聲源和反射界面或者散射體之間存在相對(duì)運(yùn)動(dòng)時(shí)，被反射或被散射的超聲波信號(hào)的頻率將發(fā)生變化，該頻率與聲源超聲波頻率之間的差值與相對(duì)運(yùn)動(dòng)的速度成正比，這一現(xiàn)象稱之為多普勒效應(yīng)。接收信號(hào)的頻率 與聲源的頻率之差稱為多普勒頻移；相應(yīng)的頻差信號(hào)稱為多普勒信號(hào)。當(dāng)流體存在著可反射或散射超聲波的跟隨粒子時(shí)，便可以利用多普勒信號(hào)確定流體的速度。具有空間頻率高，能進(jìn)行非接觸的測(cè)量，不需要校正、響應(yīng)特性好，應(yīng)用范圍寬等特點(diǎn)。 【關(guān)鍵詞】 管道液體流速，超聲波多普勒，多普勒信號(hào) 鹽城師范學(xué)院畢業(yè)論文（設(shè)計(jì)） 2 Abstract In the rapid development of technology in today39。s society, the flow rate measurement is widely used in industry, agriculture and medicine, pipe liquid flow rate is measured liquid flow rate measuring one aspect of the application. Pipe flow measurement using ultrasound Doppler effect mainly measured incident and reflected waves of the frequency difference between the flow rate measurement for, when the ultrasonic sound source and the reflector or the relative motion between the scattering when the ultrasonic wave is reflected or scattered will change the frequency of the signal, the frequency of the sound source and the difference between the ultrasonic frequency proportional to the speed of relative motion, this phenomenon is called the Doppler effect. Frequency of the received signal of the difference between the sound source frequency is called the Doppler frequency shift。 corresponding difference signal is called the Doppler frequency signal. When the fluid there may be an ultrasonic wave is reflected or scattered particles to follow, can take advantage of the Doppler signal to determine the fluid velocity. Having a high spatial frequency can perform noncontact measurement, no correction, the response characteristics of a good, wide range of applications and so on. [Keywords] pipeline fluid velocity, Doppler ultrasound, Doppler signal 鹽城師范學(xué)院畢業(yè)論文（設(shè)計(jì)） 3 目 錄 緒論 ................................................................................................................................... 4 流速的概述 .......................................................................................................... 4 液體流速測(cè)量的概況 .......................................................................................... 4 管道液體流速測(cè)量的研究意義及發(fā)展 .....................................................
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