用弹簧振子受迫振动测量液体黏度  

Measurement of viscosity of liquid by using forced vibration of spring oscillator

作　　者：陈国杰[1] 周有平[1] 钟土基[1] 范儒福[1] 

机构地区：[1]佛山科学技术学院理学院,广东佛山528000

出　　处：《大学物理》2013年第10期30-34,共5页College Physics

基　　金：广东省高等教育教学改革项目(BKYB2011085);"大学物理实验"优质课程资助

摘　　要：利用弹簧振子受迫振动设计了一种液体黏度测量装置.用电机驱动钢球在待测液体中做受迫振动,用霍尔传感器测量钢球的振幅和共振频率,测量了不同温度下蓖麻油和甘油的黏度.结果表明,在23~29℃测量值与理论值的相对误差小于3%.该方法测量准确,无油污,物理原理清晰,教学效果好.An instrument for measuring the viscosity of a liquid is designed by using the forced vibration of a spring oscillator.A direct-current motor drives a steel ball to vibrate in the measured liquid.A Hall sensor is used to measure the vibration amplitudes and resonance frequencies of the steel ball.The viscosities of the castor oil and glycerol with the different temperatures are measured by the use of the instrument,respectively.The experimental results show that the relative errors between the measured values and theoretical values of the castor oil and glycerol under the temperatures from 23℃ to 29℃ are less than 3%.This measurement method has advantages of higher accuracy,no oil-pollution,obvious resonance,clear physical principle and good teaching effect.

关 键 词：黏度测量 弹簧振子 受迫振动 

分 类 号：O353.5[理学—流体力学]