摘要
利用超声波在水中的传播特性测得水密度,其相对误差为0.51%。与传统方法相比,该法具有原理简单,操作方便,精确度较高等优点。配制了45种不同浓度的食盐溶液,计算出每种溶液的密度、体积模量和超声波的传播速度,并分别给出声速与溶液浓度、密度、体积模量之间的线性定标公式。
The water＇ s density is measured by the spread property of ultrasonic wave in water, the relative error between the experimental result and the standard value is 0.51%. Compared with the traditional method, this method has many advantages：simple principle, simple operation process and higher degree of accuracy etc. To prepare 45 NaCl solutions, the density, the bulk modulus and the velocity of ultrasonic wave have been figured out for each solution, therefore, three linear scaling formulae have been given, they are respectively the relations between the velocity of ultrasonic wave and solution＇s concentration, density, bulk modulus.
出处
《大学物理实验》
2014年第3期7-10,共4页
Physical Experiment of College
基金
黑龙江省大学生创新训练指导项目(201310234009)
哈尔滨学院新世纪高等教育教学改革工程一般项目(2012)
关键词
超声波
食盐溶液
液体密度
体积模量
声速
ultrasonic wave
NaCl solution
liquid density
bulk modulus
velocity of sound
