研究了超导磁传感器的交流标定方法,并在此基础上研究了不同软件梯度计的实现方案及其对环境干扰磁场的抑制能力.采用多个频率、多个强度的参考磁场对传感器进行标定得到的结果一致性良好.合成的一阶软件梯度计经过实验验证具有很好的微弱磁信号检测能力,在城市实验室噪声环境下成功实现了约50pT微弱磁场信号的探测.还对标定精度以及实验中观察到的不同软件梯度计方案结果之间的差别进行了讨论.
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