基于单片机的低频弱磁场发生仪的设计

Design of low-frequency weak magnetic field generator based on single chip microcomputer

目的：为研究低频弱磁场的生物效应,设计一种能产生矩形、三角和正弦磁场的低频多波形电磁场发生仪。方法：以单片机为控制核心,设计相关软件产生多种类型和不同频率的信号,系统总体由单片机控制模块控制键盘控制模块、显示模块、波形产生模块3个部分。结果：设计的仪器可产生1-100 Hz不同频率的多种波形弱磁场。结论：该仪器具有操作方便、可精确产生各种不同类型波形、能量易控制的特点,可用于多种低频弱磁场的生物效应研究与临床治疗。

Objective To design a low-frequency multi-waveform electromagnetic field generator to study the biological effect of the low-frequency weak magnetic field, which can form rectangular, triangular and sinusoidal magnetic fields. Methods A single chip microprocessor was used as the control core, and corresponding software was designed to generate types and frequencies of signals. The magnetic field generator was composed of the SCM and its periphery circuit, keyboard circuit, DA converter module, amplifier circuit, LCD display circuit, etc. Results The generator generated multi-waveform weak magnetic fields with frequencies from 1 to 100 Hz. Conclusion The generator behaves well in operation, multi-waveform generation and energy control, and thus can be used to study the biological effect and clinical application of multi weak magnetic fields.