摘要
本文提出了新型均速管涡街流量传感器,实现差压与频率信号的双参数测量,并根据涡街信号的不同采集方式分为压电式和差压式两种类型。对两种一体化流量传感器的结构、原理以及信号采集方式进行了设计和阐述,并对其测量特性进行对比分析。结果表明,采用差压式流量传感器与经验小波变换(EWT)相结合,能将量程比由10:1拓宽至140:1。单相气最大测量误差绝对值由1.46%减小至0.49%,重复性由0.17%降至0.05%,水流量最大测量误差绝对值也实现了从1.00%下降至0.49%,重复性低于0.07%。与压电式流量传感器相比,差压式均速管涡街流量传感器在测量精度及测量范围中具有一定的应用优势,为湿蒸汽测量提供了一种新思路。
A new type of flow sensor integrated with uniform velocity tube and vortex is proposed in this paper,which can simultaneously measure the dual-parameter measurement of the differential pressure signal and frequency signal.According to the different extraction methods of the vortex signal,they are divided into piezoelectric type and differential pressure type.The structure,theory,signal acquisition methods of the two flow sensors are mainly designed and expounded in this paper,and the measurement characteristics of them are compared through gas and water.The experimental results show that the combination of the differential pressure flow sensor and the empirical wavelet transform(EWT)can widen the range ratio from 10:1 to 140:1.The absolute value of the maximum measurement error of single-phase gas is reduced from 1.46%to 0.49%,and the repeatability is reduced from 0.17%to 0.05%.The absolute value of the maximum measurement error of water is also reduced from 1.00%to 0.49%,and the repeatability is lower than 0.07%.Compared with the piezoelectric flow sensor,the differential pressure uniform velocity tube vortex flow sensor has certain application advantages in measurement accuracy and measurement range,and provides a new idea for wet steam measurement.
作者
刘月圆
梁玉娇
郑盟
方立德
Liu Yueyuan;Liang Yujiao;Zheng Meng;Fang Lide(School of Quality and Technical Supervision,Hebei University,Baoding 071002,China;National&Local Joint Engineering Research Center of Metrology Instrument and System,Baoding 071000,China;Hebei Key Laboratory of Energy Measurement and Safety Testing Technology,Baoding 071000,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2022年第12期10-18,共9页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(62173122)
河北省自然科学基金重点项目(F2021201031)
京津冀协同创新共同体建设专项(20540301D)项目资助
关键词
均速管
涡街流量计
压电式
差压式
测量特性
uniform velocity tube
vortex flowmeter
piezoelectric type
differential pressure type
measurement characteristic
