基于控温系统的超声光栅测量透明液体浓度  

Concentration measurement of transparent liquid based on ultrasonic grating and temperature control system

作　　者：李一彤 陈杭 李承乾 段雪松[2] 孔祥明[2] 叶文江[2] LI Yi-tong;CHEN Hang;LI Cheng-qian;DUAN Xue-song;KONG Xiang-ming;YE Wen-jiang(Arizona College of Technology,Hebei University of Technology,Tianjin 300401,China;School of Sciences,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学亚利桑那工业学院,天津300401 [2]河北工业大学理学院,天津300401

出　　处：《大学物理》2024年第3期74-78,共5页College Physics

基　　金：中国高等教育学会专项课题(21LKYB05);河北省高等教育教学改革研究与实践项目(2017GJJG018);河北工业大学教育教学改革研究项目(201802003)资助

摘　　要：浓度是描述溶液特性的重要物理量,随温度的改变而发生变化.基于超声光栅测量透明液体中声速的方法,以透明溶液氯化钠溶液为例,通过控制变量法研究了声速、浓度、温度三者之间的关系,最终定量得出三者所满足的方程,实现了不同温度下浓度的测量.结果表明,该方法测量液体浓度置信度高,相对误差小,且广泛适用于透明液体浓度的测量,具有时效性高、反映时间短、精度高等优点。Concentration is an important physical quantity to describe the properties of a solution.It changes with the change of temperature.Based on the method of ultrasonic grating measurement of sound velocity in transparent liquid,taking transparent sodium chloride solution as an example,the relationship among sound velocity,concentration and temperature is studied through the control variable method.Finally,the equations of these three parameters is obtained quantitatively,and the concentration is measured at different temperatures.The results show that the method has high confidence and small relative error,and is widely applicable to the measurement of transparent liquid concentration.It has the advantages of high timeliness,short response time and high precision.

关 键 词：超声光栅 声速 温度 透明液体浓度 

分 类 号：O4-34[理学—物理]