摘要
设计一套基于STM32单片机的双极性脉冲磁场产生装置,通过STM32单片机产生电脉冲信号,通过电脉冲信号控制步进电机带动塑料圆盘上的永磁体组产生双极性脉冲磁场。通过控制变量法,设计多组实验组和空白对照组,运用双极性脉冲磁场处理人工硬水,并采用EDTA滴定法实时测量人工硬水中钙离子浓度,利用MATLAB软件将多组数据拟合成曲线。最后通过比较不同频率的双极性脉冲磁场下钙离子浓度变化趋势、拟合函数、阻垢系数来判断阻垢效果。将该实验方案引入教学,可以激发学生实际动手能力,更好地理解磁场在实际生活中的应用,培养学生的探索精神,让学生能够将所学知识运用至实际生活中。
A set of bipolar pulse magnetic field generation device based on STM32 single chip microcomputer is designed.The electric pulse signal is generated by STM32 single chip microcomputer,and the stepping motor is controlled by the electric pulse signal to drive the permanent magnet group on the plastic disc to generate bipolar pulse magnetic field.Through the control variable method,multiple groups of experimental groups and blank control groups are designed.The artificial hard water is treated with bipolar pulsed magnetic field,and the calcium ion concentration in the artificial hard water is measured in real time by EDTA titration.Multiple groups of data are fitted into a curve by MATLAB software.Finally,the scale inhibition effect is judged by comparing the variation trend of calcium ion concentration,fitting function and scale inhibition coefficient under bipolar pulsed magnetic field with different frequencies.Introducing the experimental scheme into teaching can stimulate students’practical ability,better understand the application of magnetic field in real life,cultivate students’exploration spirit,and enable students to apply their knowledge to real life.
作者
林振朗
陈庭杰
彭开泉
罗炜军
林宇钊
曾育锋
LIN Zhenlang;CHEN Tingjie;PENG Kaiquan;LUO Weijun;LIN Yuzhao;ZENG Yufeng(College of Physics and Telecommunications Engineering,South China Normal University,Guangzhou 510006,China;National Demonstration Center for Experimental Physics Education,South China Normal University,Guangzhou 510006,China)
出处
《大学物理实验》
2022年第5期81-86,共6页
Physical Experiment of College
关键词
脉冲磁场
阻垢系数
EDTA滴定法
pulsed magnetic field
scale inhibition coefficient
EDTA titration
作者简介
通讯联系人:曾育锋。
