畢業(yè)設(shè)計(jì)論文-管道液體流速在線測量系統(tǒng)設(shè)計(jì)-展示頁
2025-06-14 01:27本頁面
【正文】 間存在相對運(yùn)動(dòng)時(shí)，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(yùn)動(dòng)的速度成正比，這一現(xiàn)象稱之為多普勒效應(yīng)。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確定流體的速度。 【關(guān)鍵詞】 管道液體流速，超聲波多普勒，多普勒信號 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。 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 液體流速測量的概況 .......................................................................................... 4 管道液體流速測量的研究意義及發(fā)展 ............................................................. 5 超聲波多普勒測管道流速原理 ........................................................................................ 6 超聲波傳感器的基本原理 .................................................................................. 6 多普勒效應(yīng)測流速原理 ...................................................................................... 6 超聲波多普勒測管道流速設(shè)計(jì) ........................................................................................ 8 超聲波發(fā)射模塊設(shè)計(jì) .......................................................................................... 8 超聲波接收模塊 設(shè)計(jì) .......................................................................................... 8 選頻放大電路 ........................................................................................... 8 解調(diào)電路 ................................................................................................... 8 低通濾波器的設(shè)計(jì) ................................................................................... 9 放大電路的設(shè)計(jì) ....................................................................................... 9 超聲波多普勒測管道流速設(shè)計(jì)思想 .............................................................................. 10 5 總結(jié) ............................................................................................................................... 11 致謝 .................................................................................................................................. 11 參考文獻(xiàn) .............................
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