摘要
基于单片机技术对第一代磁力平衡悬梁式液体界面张力测量仪进行了改进,通过引入无超调变积分系数PI(比例-积分)控制器以及窗口算法,不仅实现了单摆式悬梁水平的自动控制,而且实现了液膜破裂的自动判断.通过上述改进,有效地减小了仪器的操作难度,提高了测量效率和准确度.
Based on the single-chip microcomputer technique,the first-generation magnetic balance cantilever-type liquid interfacial tensiometer was improved.By introducing an overshoot-free proportional-integral（PI）controller with variable integral coefficient and a window algorithm,the automatic balance of single-pendulum cantilever was achieved,and the burst of liquid membrane was correctly judged.As a result,the experimental difficulty was reduced,and the measuring efficiency and accuracy were improved.
作者
韩亚宁
陈志艳
王军
HAN Ya ning;CHEN Zhi yan;WANG Jun(College of Information and Control Engineering;College of Science China University of Petroleum,Qingdao 2GG580,China)
出处
《物理实验》
2018年第5期44-47,51,共5页
Physics Experimentation
基金
国家级大学生创新创业训练项目(No.201610425062)
关键词
界面张力
单片机
PI控制器
窗口算法
interracial tension
single chip microcomputer
PI controller
window algorithm
