摘要
测量重力加速度的方法有自由落体法,气垫导轨法,单摆法和平衡法等,但装置存在体积较大,精度不高等不足。由传统平衡法进行改进并根据牛顿第二、三定律和力的平衡定理,提出新的计算方法,设计得到重力加速度测量装置。装置由6个压阻式传感器构成正六面体,测量质量已知的无磁性铁球平衡时所受的合力,计算当地重力加速度值。设计的重力加速度装置精度达到±0.002 m/s2,相对误差小于0.043%,可有效地应用于教学与科研领域。
The gravitational acceleration measurement accuracy was increased by improving the existing method. Devices based on tradional methods, such as free-fall method, balance method, etc, were large and imprecise. The method improved from traditional balance method and the arithmetic was based on Newton＇s second and third laws. The device figured out the local gravitational ac- celeration using a regular hexahedron made up of 6 piezoresistive transducers when the mass of nonmagnetic iron ball and the force on it were known. The precision reached ±0. 002 m/s2 and the relative error was lower than 0. 043% ,which applied to teaching and scientific research.
出处
《仪表技术与传感器》
CSCD
北大核心
2014年第10期19-21,27,共4页
Instrument Technique and Sensor
基金
2012年大学生创新创业训练计划优秀项目(2012B65208)
关键词
重力加速度
平衡法
压阻式传感器
无磁性铁球
正六面体
gravitational acceleration
balance method
piezoresistive transducer
nonmagnetic iron ball
regular hexahedron
