基于BP神經(jīng)網(wǎng)絡的超聲測流量系統(tǒng)精度提升
2020年電子技術應用第6期
劉 濤,王紅亮
中北大學 電子測試技術國家重點實驗室,山西 太原030051
摘要: 基于超聲波測流量的時差法測量原理,分析了換能器凹凸安裝和安裝位置偏差引起的測量誤差,建立了測流量的系統(tǒng)模型,提出了基于BP神經(jīng)網(wǎng)絡的流量計算方法以補償測量誤差。以Senscomp Tao2008超聲波探頭為例,在基于神經(jīng)網(wǎng)絡算法設計的系統(tǒng)軟硬件中測量流量。從探頭安裝位置偏差、凹凸安裝以及不同流速等方面進行分析,實驗結(jié)果表明,神經(jīng)網(wǎng)絡比傳統(tǒng)的權重系統(tǒng)擁有更強的非線性補償能力。
中圖分類號: TN911
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.190975
中文引用格式: 劉濤,王紅亮. 基于BP神經(jīng)網(wǎng)絡的超聲測流量系統(tǒng)精度提升[J].電子技術應用,2020,46(6):55-58.
英文引用格式: Liu Tao,Wang Hongliang. The accuracy upgrade of ultrasonic flow measurement system based on BP neural network[J]. Application of Electronic Technique,2020,46(6):55-58.
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.190975
中文引用格式: 劉濤,王紅亮. 基于BP神經(jīng)網(wǎng)絡的超聲測流量系統(tǒng)精度提升[J].電子技術應用,2020,46(6):55-58.
英文引用格式: Liu Tao,Wang Hongliang. The accuracy upgrade of ultrasonic flow measurement system based on BP neural network[J]. Application of Electronic Technique,2020,46(6):55-58.
The accuracy upgrade of ultrasonic flow measurement system based on BP neural network
Liu Tao,Wang Hongliang
National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan 030051,China
Abstract: Based on the principle of time difference method of ultrasonic flow measurement, the measurement errors caused by the convexity and convexity installation and installation position deviation of transducer are analyzed, the system model of flow measurement is established, and the flow calculation method based on BP neural network is put forward to compensate the measurement errors.Taking Senscomp Tao2008 ultrasonic probe as an example, the flow is measured in the software and hardware of the system designed based on the neural network algorithm.The experimental results show that the neural network has stronger nonlinear compensation ability than the traditional weight system.
Key words : neural network;ultrasonic;flow measurement;influencing factors;accuracy
0 引言
超聲波氣體流量計作為一種非接觸式的測量儀器,因其具有高精度、無內(nèi)置阻流、對管徑適應能力強等優(yōu)勢,在流量測量領域尤其是天然氣測量系統(tǒng)占據(jù)著重要位置[1]。其工作原理是當超聲波在介質(zhì)中傳播時會攜帶流體的流速信息,因此可以通過測量超聲波的傳播時間來計算流速,進而得知流量[2-5]。雖然超聲波流量計擁有各種優(yōu)勢,但在實際應用中,探頭的安裝方式、安裝位置偏差、安裝角度都會造成測量誤差,影響超聲流量計的測量精度[6-8]。因此,近年來針對硬件設計和信號處理過程的改進從而提高流量測量的精度已經(jīng)成為科研工作者的重點[9]。本文針對探頭安裝效應引起的誤差,采用神經(jīng)網(wǎng)絡的測量系統(tǒng)來提高測量精度。
論文詳細內(nèi)容請下載http://ihrv.cn/resource/share/2000002843
作者信息:
劉 濤,王紅亮
(中北大學 電子測試技術國家重點實驗室,山西 太原030051)
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