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文章介绍了霍尔元件测磁场的原理，并设计了单片机自动采集系统及与PC机进行通讯，实现了由单片机采集数据，PC机进行数据运算、存储和打印等功能。
This paper introduces the principle of measuring magnetic field of Hall element, designs the automatic acquisition system of single chip computer and communicates with PC, and realizes the functions of data acquisition, data processing, storage and printing by single chip microcomputer.