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中文摘要：
为采用物理实验的方法,辅助研究心脏磁场理论及其应用算法和软件,我们研究和制作了一个9通道阵列磁信号同步测量系统。考虑HMC2003测量到的磁信号具有低通特性,在系统电路设计时,我们采用电路分层与磁噪声抑制的方法,有效地削弱了磁测量系统的自带磁噪声,尤其是低频成分。同时,我们在非屏蔽环境下的Helmholtz均匀静态场中对HMC2003的两类参数K与Δ做了同步标定。目前,该系统可实现X、Y、Z三轴磁信号测量,最大绝对误差小于240nT。
英文摘要：
A simultaneous measurement system for 9-channel array magnetic signals has been made with the aim of helping to experimentally investigate the theory and algorithms related to the cardiac magnetic field.Considering the low-pass characteristic of magnetic signals measured by HMC2003,we adopted two methods of circuit stratification and suppression for magnetic noise,efficiently impairing the system noise,especially the low-frequency magnetic noise.Also,to evaluate the measurement precision,we calibrated two kinds of parameters of HMC2003 in the unshielded environment with a Helmholtz uniform field.After calibration,the maximum error of 240nT can be achieved in the measurement of magnetic signal by this system.
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