針對目前流體測量儀測量參數(shù)單一的問題,提出了一種用超聲波技術(shù)測量流體多參數(shù)的方法。當(dāng)傳播距離不變時,利用超聲波在流體中的傳播速度間接得到流體的體積流量、密度、質(zhì)量流量。由于流體流量、密度等參數(shù)均受溫度影響,故設(shè)計過程中以溫度作為參考信號,為所求參數(shù)就行實時補償。同時,測量儀以FPGA為控制核心,實現(xiàn)高速信號采集與處理,以軟件插補算法實現(xiàn)超聲波傳播時間的精密計算,使測量結(jié)果更加穩(wěn)定可靠。

【文章頁數(shù)】：9 頁

【文章目錄】：
1 Working principle of fluid multi-parameter ultrasonic measuring instrument for fluid
    1.1 Measurement principle
        1.1.1 Volume flow measurement
        1.1.2 Fluid density measurement
        1.1.3 Mass flow measurement
    1.2 Multichannel structure design of measuring instrument
2 Scheme design
3 Circuit design
    3.1 Hardware circuit design
    3.2 Software design
    3.3 Calculation of ultrasonic propagation time
    3.4 Measurement accuracy analysis
        3.4.1 The revision of flow velocity distribution
        3.4.2 Temperature correction
        3.4.3 Resolution analysis
    3.5 Analysis of results
4 Conclusions



本文編號：3825428