超声波气体计量系统算法设计与流量实验  

Design of ultrasonic gas metering algorithm and flow experiments

作　　者：彭大江 赵勇 朱炼 张彬[2] 周钰宏 Peng Dajiang;Zhao Yong;Zhu Lian;Zhang Bin;Zhou Yuhong(Research Institute of IoT Technology,Chengdu Qianjia Technology Co.,Ltd.;School of Electronics and Information Engineering,Sichuan University)

机构地区：[1]成都千嘉科技股份有限公司物联网技术研究院 [2]四川大学电子信息学院

出　　处：《上海计量测试》2024年第6期19-23,29,共6页Shanghai Measurement and Testing

基　　金：四川省博士后创新人才支持计划项目(BX202215)。

摘　　要：随着天然气的逐渐普及,超声波计量技术成为燃气计量领域的研究重点。为实现高准确度的气体计量,首先基于双阈值过零检测法的时间测量芯片搭建硬件方案;然后设计信号自适应算法用于匹配不同气体环境和流场;其次通过流量滤波算法提升计量系统稳定性;最后基于流量校准方法保证量程范围内的计量准确度。按照超声波燃气表型式评价大纲开展流量实验,结果显示计量准确度可达1.5级标准,且在40℃高温和-10℃低温环境下表现出良好的温度适应性。With the gradual popularization of natural gas,ultrasonic metering technology has become a research focus in the field of gas metering.To realize high-precision gas metering,firstly,a hardware scheme is constructed based on the time measurement chip with dualthreshold zero crossing detection method;secondly,a signal adaption algorithm is designed for matching different gas environments and flow fields;then the stability of the metering system is improved by the flow filtering algorithm;finally,the metering accuracy within the range is ensured based on the flow calibration method.The flow experiment is carried out according to the Program of Pattern Evaluation of Ultrasonic Gas Meters,and the result shows that the metering accuracy can reach the standard of 1.5 grade.In addition,the system shows good temperature adaptability under the environment of high temperature of 40℃and low temperature of-10℃.

关 键 词：超声波气体计量 双阈值过零检测 信号自适应 温度适应性 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]