基于声速追踪的超声波液体流量计量方法  

Method Based on Tracking Acoustic Speed for Ultrasonic Liquid Flow Metering

作　　者：赵楠楠 徐安察 胡亮[1] 付新[1] ZHAO Nan-nan;XU An-cha;HU Liang;FU Xin(State Key Laboratory of Fluid Power&Mechatronic Systems,Zhejiang University,Hangzhou 310027,China;Zhejiang CHEER Technology Co.,Ltd.,Hangzhou 311305,China)

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027 [2]浙江启尔机电技术有限公司,浙江杭州311305

出　　处：《仪表技术与传感器》2022年第9期41-46,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金(51575476);国家自然科学创新团队基金(51821093)。

摘　　要：针对环境因素、介质更换等造成液体介质声速变化引起的流量计量偏差,提出一种基于声速自适应的超声液体流量计算方法。在阈值法和求和互相关等方法的基础上,获取声波传播时间信息对流量进行修正。并通过实验,验证了该方法能够有效抑制声速变化对基于超声波方法计量液体流量的影响,提高了液体超声流量传感器流量计量的稳定性和可靠性。Aiming at flow measurement deviation due to change of acoustic speed in liquid,which caused by environmental factors and medium replacement,a method based on ultrasonic fluid flow calculation method based on adaptive acoustic speed was proposed.According to threshold method and sum correlation method,information of acoustic wave propagation time was obtained to correct flowrate.And through experiments,it is verified that this method can effectively suppress influence of acoustic velocity change on the measurement liquid flow based on ultrasonic method,and improve the measurement stability and reliability of ultrasonic flow sensor.

关 键 词：时差法超声波流量计 渡越时间差 声速 流量补偿 

分 类 号：TH814[机械工程—仪器科学与技术]