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本文根据电磁学中的比奥－－沙伐－－拉普拉斯定律，推倒出了圆片永磁磁源空间磁感强度的计算公式；并使用数值积分和计算机程序，建立了该公式的计算方法；最后通过实例计算，得出了圆片永磁磁源空间磁感强度的量值分布。为磁生物效应研究中磁源的使用提供了理论依据。
According to the law of Biot-Savar-Laplace in electromagnetics, the formula of magnetic induction intensity of the permanent magnet magnetic source in the wafer is deduced. Based on numerical integration and computer program, the formula of Finally, an example is given to calculate the magnitude distribution of the magnetic induction intensity of the permanent magnet source. It provides a theoretical basis for the use of magnetic source in the study of magnetism effect.