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速差法超声波气体流量计的原理和校准
引用本文:钱梦騄,梁军汀,朱士明,卢杰.速差法超声波气体流量计的原理和校准[J].应用声学,1995,14(6):21-25.
作者姓名:钱梦騄  梁军汀  朱士明  卢杰
作者单位:同济大学声学研究所!上海200092;同济大学声学研究所!上海200092;同济大学声学研究所!上海200092;同济大学声学研究所!上海200092
摘    要:本简要地介绍一种利用超声脉冲沿顺、逆流方向上传播速度之差来测定气体流速及流量的新的微机化超声波气体流量的工作原理,以及它在内径为700mm,流速在3-13m/s范围内的校准结果,实验结果表明该微机化超声气体流量计的测速精度优于±2%。

关 键 词:超声  气体流量计  校准  速差法

Principle and calibration of ultrasonic gas flowmeter using velocity-difference method
Qian Menglu,Liang Junting,Zhu Shiming and Lu jie.Principle and calibration of ultrasonic gas flowmeter using velocity-difference method[J].Applied Acoustics,1995,14(6):21-25.
Authors:Qian Menglu  Liang Junting  Zhu Shiming and Lu jie
Institution:Institute of Acoustics, Tongji University, Shanghai 200092;Institute of Acoustics, Tongji University, Shanghai 200092;Institute of Acoustics, Tongji University, Shanghai 200092;Institute of Acoustics, Tongji University, Shanghai 200092
Abstract:The gas flow in a closed tube can be determined by measuring the difference between the downstream and upstream propagating velocity of ultrasound.In this paper the principle of this kind of ultrasonic flowmeter is discussed in detail and the experimental results of calibration about the gas flowmeter in a 700mm tube system are presented.It is shown that its relative accuracy of measuring the velocity of flow is better than ±2% in the range of 3-13 ms.
Keywords:Ultrasound  Gas flowmeter  Calibration
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