速度差法超声波流量计硬件延时误差分析及对策  

Error Analysis and Countermeasure of Hardware Delay of Ultrasonic Flowmeter in Speed Difference Method

作　　者：李蕊[1] 刘冰[1] 杨佳[1] 周莹[1] 

机构地区：[1]天津商业大学机械工程学院,天津300134

出　　处：《仪表技术与传感器》2017年第3期45-48,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(11272223);国家自然科学基金青年基金项目(71401123);天津商业大学青年基金项目(160112)

摘　　要：基于速度差法超声波流量计的测量原理,分析了硬件延时对测量精度造成的误差。提出可采用二次回波法和声速法来提高测量精度,利用数学模型分析2种方法的可行性,最后通过实验验证这2种方法,实验结果表明二次回波法和声速法对提高了超声波流量计测量精度的可行性和有效性。Based on the measurement principle of ultrasonic flowmeter in differential velocity method,the error of the measurement accuracy caused by the hardware delay was analyzed.It is presented the second echo method and the sound method can improve the measurement accuracy.It applied mathematical model to analyze the feasibility of the two methods.Finally the two methods were verified through the experiment,and the experimental results show that the feasibility and effectiveness of the secondary echo method and the sound velocity method to improve the measurement accuracy of the ultrasonic flowmeter.

关 键 词：超声波流量计 速度差法 硬件延时 二次回波 声速 误差分析 

分 类 号：TH814[机械工程—仪器科学与技术]