用于超导磁梯度测量的误差补偿方法

Magnetic gradient measurement and compensation based on superconducting magnetometer

针对基于超导磁力仪的磁梯度测量模块结构,分析了磁梯度测量原理,并结合梯度计的安装误差,分析了超导磁梯度仪不平衡度干扰产生的原因,建立了干扰补偿模型并给出了模型求解方法。在此基础上,在不同环境下分别进行了无磁性目标和有磁性目标的磁梯度测量及补偿实验。实验结果表明:文中所建干扰补偿模型,在保留目标信号的基础上,能够有效消除环境磁梯度噪声,为实现磁场全张量测量提供了必要的技术支撑。

For measuring module structure based on superconducting magnetic gradient magnetometer,the magnetic gradient measurement principle is analyzed in detail.In terms of the gradientmeter installation error,the reasons for superconducting magnetic gradiometer imbalance interference are analyzed.The disturbance compensation model is established and its solution is given.The experiments of magnetic gradient measurement and compensation are carried out under different circumstances.The experimental results show that the disturbance compensation model can effectively eliminate ambient magnetic gradient noise with the target signal retained.It provides necessary technical support for the realization of the full tensor magnetic field measurements.