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PDF(919 KB)
PDF(919 KB)
基于静水拖曳法的超声测流装置时间差测量能力评价方法研究
Research on the Evaluation Method of Time Difference Measurement Capability of Ultrasonic Flow Measuring Devices Based on the Hydrostatic Towing Method
针对大口径超声测流装置时间差难以实现溯源的问题,提出了一套基于静水拖曳法的测量能力评价方案。从超声测流的原理出发,建立了超声传播时间差与流速量值之间的转换模型,并研制了基于静水拖曳法的实验测试装置和溯源路径,对转换模型进行了验证。通过6组传感器的实验测试结果,表明该测量能力评价方案具有可行性,由时间差测量引入的标准不确定度为0.26~0.49 ns。
A measurement capability evaluation method based on the hydrostatic towing method was proposed to address the issue of difficulty in achieving traceability of the time difference of large-diameter ultrasonic flow measurement devices. Starting from the principle of ultrasonic flow measurement, a conversion model between ultrasonic transit time difference and flow velocity value was established. and an experimental testing device and traceability path based on the hydrostatic towing method were developed to verify the conversion model. The experimental test results of 6 sets of sensors indicated that the measurement capability evaluation method is feasible, and the standard uncertainty introduced by time difference measurement is 0.26~0.49 ns.
流量计量 / 超声测流装置 / 时间差 / 溯源 / 静水拖曳法 / 不确定度
flow measurement / ultrasonic flow measurement device / time difference / traceability / hydrostatic towing method / uncertainty
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