超声水表声道布置与权重系数设置方法的讨论

Discussion on the Method of Sound Channel Arrangement and Weight Coefficient Setting for the Ultrasonic Water Meter

多声道超声水表可以削弱由管道内流场畸变和管壁粗糙度变化给测量结果带来的影响。合理设置超声换能器在管道内的位置以及选择相应声道的权重系数,是保证多声道超声水表进行准确测量的重要设计工作。对多参数超声水表工作原理、计算公式、线-面平均流速之间关系以及校准方法等进行分析与梳理,以期为设计、制造、使用多参数超声水表的相关人员提供参考和帮助。

Multi-sound-channel ultrasonic water meter can reduce the influence of flow field distortion and wall roughness change on the measurement results. It is an important design work to ensure the accurate measurement of multi-sound-channel ultrasonic water meter to properly set the position of ultrasonic transducer in the pipeline and select the weight coefficient of corresponding sound channel. The working principle, calculation formula, the relationship of the average velocity between the line and surface, and calibration method of the multi-parameter ultrasonic water meter are analyzed and sorted, in order to provide reference and help for the design, manufacture and use of the multi-parameter ultrasonic water meter.