超声测流装置的实验室测试与优化  

Laboratory Test and Optimization of Ultrasonic Flow Measurement Device

作　　者：刘敦利 蔡勤 胡鹤鸣[2] LIU Dun-li;CAI Qin;HU He-ming(Xinjiang Uygur Autonomous Region Research Institute of Measurement&Testing,Urumqi,Xinjiang 830011,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]新疆维吾尔自治区计量测试研究院,新疆乌鲁木齐830011 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2021年第10期1282-1287,共6页Acta Metrologica Sinica

基　　金：国家质量基础的共性技术研究与应用专项(2017YFF0206303)。

摘　　要：为提高大口径管道流量在线校准的准确度,建立了一套多声道超声测流装置,对其现场探头定位安装及几何测量方法进行了优化,并在研究流量计算模型的基础上进行了不同探头插入状态的实验室测试。在DN400的管道上安装交叉4声道超声探头,测试了3种探头插入状态,通过分析流量测量误差来得到最优化方案。实验表明,探头插入状态显著影响装置流量测量误差,随着插入深度的增加流量测量结果逐渐增大,但即使全突状态流量依然偏小;3种状态中全缩线性较好,经过系数修正后,全缩状态下超声测流装置计量准确性最高,达到0.2级;超声测流装置经过实验室测试与优化,可以满足1.0级大口径管道流量在线校准的要求。In order to improve the accuracy of online flow calibration for large diameter pipeline,a set of ultrasonic flow measurement device is established. The probe installation technical process and geometric parameter measurement method are optimized for practical use. The flow rate model is studied and flow rate calibration under different probe protrusion state is done in the laboratory. The configuration of double-plane 4-path is installed for a DN400 pipe,and three probe protrusion states are tested to get a best solution based on flow error analysis. The experiments shows that the probe protrusion state has a significant impact on the flow measurement error of the device,and flow measurement results increases with the increase of probe insertion depth. The full contraction state is with the best linearity,and the practical installation with this state can get the best flow measurement accuracy with 0. 2 level after a coefficient correction. The ultrasonic flow measurement device can meet the accuracy requirements of online flow calibration for 1. 0 level large diameter pipeline after laboratory optimization.

关 键 词：计量学 流量计量 超声测流装置 在线校准 系数修正 探头状态 

分 类 号：TB937[一般工业技术—计量学]