摘要
针对超声波甲烷气体检测精度的问题,提出了一种超声波甲烷浓度检测系统的研究,建立了声速与气体浓度的数学模型,在超声波直接测量时间差法的基础上,采用超高精度的时间数字转换芯片TDC-GP21完成时间的精密测量。完成了超声波甲烷浓度系统设计,分析了测量精度的主要影响因素——时间测量并提出了解决方法。采用甲烷气体对系统进行测试和验证,实验结果表明该检测方法的相对误差小于2%,具有精度高、测量方便、成本低等优点,具有很好的应用前景。
For the problem of ultrasonic methane gas detection accuracy,a research on ultrasonic methane concentration detection system is proposed,established a mathematical model of sound velocity and gas concentration.Based on the ultrasonic direct measurement time difference method,the ultra-high precision time digital conversion chip TDC-GP21 is used to complete the precise measurement of time.The design of ultrasonic methane concentration system was completed,and the main influencing factors of measurement accuracy were analyzed.Time measurement and solution were proposed.The system was tested and verified by methane gas.The experimental results show that the relative error of the detection method is less than 2%.It has the advantages of high precision,convenient measurement and low cost,and has a good application prospect.
作者
侯广平
丁喜波
王如月
何鑫
HOU Guang-ping;DING Xi-bo;WANG Ru-yue;HE Xin(Higher Educational Key Laboratory for Measuring and Control Technology and Instrumentation of Province,Harbin University of Science and Technology,Harbin 150080,China)
出处
《哈尔滨理工大学学报》
CAS
北大核心
2020年第1期121-126,共6页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(61179023)。
