利用超声光栅测量液体声速的影响研究  

Influence Study on Measurement of Sound Velocity in Liquids by Ultrasonic Grating

作　　者：廖子莹 向文丽[1] LIAO Zi-ying;XIANG Wen-li(ChuXiong Nonnal University,Yunnan Chuxiong 67500)

机构地区：[1]楚雄师范学院,云南楚雄675000

出　　处：《大学物理实验》2018年第3期15-19,共5页Physical Experiment of College

摘　　要：根据声光效应原理,利用分光计和超声光栅对生活中几种常见液体(蒸馏水、75%乙醇、食用油、5%Na Cl溶液、30%葡萄糖溶液)中的声速进行了测量,同时测量了不同浓度葡萄糖溶液中的超声波声速,并利用Origin软件对其进行数据拟合分析,结果显示:不同液体介质和同种液体不同浓度对超声波声速的测量均有一定程度的影响。在几种常见的液体中,葡萄糖溶液中测量的声速误差最小;超声波在葡萄糖溶液中传播的速度在一定浓度范围内线性增大,而在浓度为32%葡萄糖溶液中的声速的拟合残差最小,该浓度下测量的超声波声速精确度最高,可作为测量超声波在葡萄糖溶液中传播速度的有效浓度。According to the principle of acousto-optic effect,the velocities of ultrasonic waves in the several common liquids（ distilled water,75% ethanol,edible oil,5% Na Cl solution and 30% glucose solution） were measured by spectrometer and ultrasonic grating. The concentrations of different qualities of glucose solution were measured too,and the data were analyzed by origin software fitting.The results show that the different liquid medium and the different concentrations of the same liquid medium had a certain degree influence on the measurement of ultrasonic velocity.The error of glucose solution is the smallest of the several common liquids.The velocity of ultrasonic wave propagation in glucose solution increases linearly in a certain concentration range.The fitting residual error of the sound velocity in the concentration of 32% glucose solution is the smallest and the highest accuracy,and this concentration can be used as an effective one for measuring the velocity of ultrasonic wave propagation in glucose solution.

关 键 词：超声光栅 声速 液体介质 浓度 葡萄糖溶液 

分 类 号：O4-34[理学—物理]