本文選題：超聲波 + 液位　； 參考：《科學(xué)技術(shù)與工程》2017年28期

【摘要】：基于容器中液位上下方氣液介質(zhì)的超聲阻抗的不同,會引起入射超聲波束在容器內(nèi)壁處的反射和透射特性產(chǎn)生差異,可以利用這個差異,從容器的外部來檢測液位。首先分析圓形活塞式探頭在金屬容器壁內(nèi)的聲場分布特征,在此基礎(chǔ)上建立了回波聲壓的計算模型,最后通過選取一系列不同壁厚的容器和不同直徑的探頭進行了實驗驗證,檢測結(jié)果能夠很好地符合理論分析,測量精度能滿足檢測要求。
[Abstract]:Based on the difference of ultrasonic impedance of the upper and lower gas-liquid medium in the container, the reflection and transmission characteristics of the incident ultrasonic beam on the inner wall of the vessel will be different, which can be used to detect the liquid level from the outside of the vessel. Firstly, the characteristics of sound field distribution of circular piston probe in metal vessel wall are analyzed. Based on this, a calculation model of echo sound pressure is established. Finally, a series of containers with different wall thickness and different diameters are selected for experimental verification. The test results are in good agreement with the theoretical analysis, and the accuracy of the measurement can meet the requirements of the detection.
【作者單位】： 中北大學(xué)電子測試技術(shù)重點實驗室;中北大學(xué)儀器科學(xué)與動態(tài)測試教育部重點實驗室;中北大學(xué)軟件學(xué)院;
【分類號】：TB559

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本文編號：2081425