基于虚拟仪器技术的磁场的测量

The Measurement of the Magnetic Field Based on Virtual Instrument Technology

以螺线管磁场测试仪为硬件基础,LabVIEW为软件支持,通过数据采集卡将两者结合,直接测得通电长直螺线管轴线上的磁场分布,实现了磁场的自动化测量。测试结果表明,不同励磁电流下,通电长直螺线管中部轴线上均为匀强磁场,且大小是端口处磁场的两倍。该方法原理直观明了,操作简单,可作为创新和研究型项目。

With the magnetic field of solenoid tester as hardware,LabVIEW as software and the data acquisition card as connecting device,the distribution of magnetic field of solenoid axis are automatically meas-ured under different exciting current.Results show that the magnetic field of the central solenoid is uniform,and which is two times of the end field of the solenoid. The method in this experiment is with intuitive principle, simple operation,and can enrich the existing content of the college physics experiment and update the innova-tion research projects.