用力传感器测量固液体的热膨胀系数  

Measurement of thermal expansion coefficient of solid and liquid using force sensor

作　　者：陈培杰[1] 汪志云[1] 周梅芝[1] 

机构地区：[1]襄樊学院物理与电子信息技术系,湖南襄樊441053

出　　处：《传感器与微系统》2008年第7期99-101,共3页Transducer and Microsystem Technologies

摘　　要：根据硅压阻式力传感器的工作原理,用传感器测量固液体热膨胀的微小长度变化量,进而测出了固液体的热膨胀系数,实验结果与公认值相比小于2%。这种方法实现了微小长度变化量的非电量电测,使实验操作简便,改进了传统的实验测量方法,拓展了传感器在普通物理实验中的应用。Based on the working principle of Si piezoresistive force sensor, and mini-changes of length of solid and liquid thermal expansion are measured by using force sensor, then the thermal expansion coefficients are measured,it is less than 2 % that the experimental results compared with recognized value. This method realizes electronic measurement of the mini-change of length, makes the measurement more simple, and improves the traditional measuring method, and extents the application of sensor in the physics experiments.

关 键 词：力传感器 热膨胀系数 非电量电测 

分 类 号：O321[理学—一般力学与力学基础]