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单声道超声流量传感器在选定的流速剖面,采用声脉冲传播路径上流速获取流体线平均速度,从而积算体积流量。为提高超声流量传感器测量精度,对单声道超声流量传感器的测量误差和不确定性进行了深入分析,提出能够精确反映声程线速度的多声道测量方式。根据Gauss积分准则给出一种18声道超声流量传感器换能器结构布局,建立时差式双传感器超声流量测量理论模型。讨论安装角度、轴向位置、轴向角等对传感器性能的影响。该模型应用于某大流量水轮机效率模拟测量工程,测试试验结果与理论模型分析计算结果一致,测量精度显著提高。
Mono Ultrasonic Flow Sensor At selected flow velocity profiles, the average velocity of the fluid line is obtained using the velocity of the acoustic pulse propagation path, and the volume flow is then integrated. In order to improve the measurement accuracy of the ultrasonic flow sensor, the measurement error and uncertainty of the ultrasonic flow sensor are analyzed in depth, and the multi-channel measurement method that can accurately reflect the linear velocity of the sound path is proposed. According to Gauss integral criterion, a 18-channel ultrasonic flow sensor transducer structure layout is given, and a time-difference dual-sensor ultrasonic flow measurement theoretical model is established. Discuss the installation angle, axial position, axial angle, etc. on the sensor performance. The model is applied to a large-flow turbine efficiency simulation measurement project. The test results are consistent with the theoretical model analysis and calculation results, and the measurement accuracy is significantly improved.