基于Analog Discovery 2的巨磁阻效应实验系统

Giant magnetoresistance effect experiment system based on Analog Discovery 2

将口袋式仪表Analog Discovery 2及其配套控制软件WaveForms引入巨磁阻效应实验,替代直流电源、信号发生器、示波器、数字信号控制器等传统仪表,完成信号的激发、采集以及处理.由Analog Discovery 2驱动螺线管、巨磁阻传感器、直流电机和步进电机等部件,可以实现巨磁阻传感器R-B基本特征曲线和高速转动转速的快速测量,还可以结合齿轮状铁磁体,实现低速转动的准确测量及微小角位移的定标和测量.各主要部件采用三维调整架固定,偏置永磁铁也配备了不同形状的导磁头,方便学生观察不同条件下的实验现象,完成更具有开放性和创新性的实验内容.

Analog Discovery 2 and its supporting software WaveForms were introduced into the giant magnetoresistance effect experimental system to replace the traditional instruments such as DC power supply,signal generator,oscilloscope and digital signal controller to complete the generation,acquisition,processing and analysis of various signals.By using Analog Discovery 2 to drive solenoid,giant magnetoresistance sensor,DC motor and stepping motor,the fast measurements of R-B curve of giant magnetoresistance sensor and high rotation speed could be realized.Accurate measurement of low speed rotation and the calibration and measurement of small angular displacement could also be realized by combining with gear-shaped ferromagnet.The main components were fixed on three-dimensional adjusting holders,and the biased permanent magnet was equipped with different shapes of magnetic head,which was convenient for students to observe the experimental phenomena under different conditions,and to complete more open and innovative experimental content.