畢業(yè)設計論文-管道液體流速在線測量系統(tǒng)設計(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 院 畢業(yè)論文 2021－ 2021 學年度 管道液體流速在線測量系統(tǒng)設計 學生姓名 學 院 物電學院 專 業(yè) 電子信息工程 班 級 09（ 3）班 學 號 092232306 指導教師 2021年 05 月 20日 鹽城師范學院畢業(yè)論文（設計） 1 管道液體流速在線測量系統(tǒng)設計 摘 要 在科技飛速發(fā)展的當今社會，流速測量廣泛應用于工農業(yè)和醫(yī)學，管道液體流速的測量是液體流速測量的一個方面的應用。管道流速測量主要利用超聲波多普勒效應測量 ， 入射波和反射波的頻差來進行流速的測定， 當超聲波聲源和反射界面或者散射體之間存在相對運動時，被反射或被散射的超聲波信號的頻率將發(fā)生變化，該頻率與聲源超聲波頻率之間的差值與相對運動的速度成正比，這一現(xiàn)象稱之為多普勒效應。接收信號的頻率 與聲源的頻率之差稱為多普勒頻移；相應的頻差信號稱為多普勒信號。當流體存在著可反射或散射超聲波的跟隨粒子時，便可以利用多普勒信號確定流體的速度。具有空間頻率高，能進行非接觸的測量，不需要校正、響應特性好，應用范圍寬等特點。 【關鍵詞】 管道液體流速，超聲波多普勒，多普勒信號 鹽城師范學院畢業(yè)論文（設計） 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 鹽城師范學院畢業(yè)論文（設計） 3 目 錄 緒論 ................................................................................................................................... 4 流速的概述 .......................................................................................................... 4 液體流速測量的概況 .......................................................................................... 4 管道液體流速測量的研究意義及發(fā)展 .....................................................
畢業(yè)設計相關推薦
鄂ICP備17016276號-1