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航空超导全张量磁梯度仪是使用飞行平台搭载的磁法测量设备,因其磁场灵敏度高、采集信息丰富、体积小等特点,被认为是第三代航磁探测的发展方向.本文构建了六棱锥构型的全张量梯度模块,由一个三轴超导量子干涉器(SQUID)磁强计和6个低温超导平面一阶SQUID梯度计组成.测试结果表明,在该多通道系统中,SQUID之间的串扰明显,对测量结果造成影响.本文对该超导全张量磁梯度仪的串扰进行了分析,并测量了串扰数据.分析了影响串扰的因素后,通过增加SQUID间的间距和改变接线方式等措施,对全张量模块结构进行了优化.实验结果表明,新构型模块对串扰改善在一个数量级以上,极大地提高了超导全张量磁梯度仪的精度和实用性.
Aeronautical superconducting total tensor magnetic gradiometer is a magnetic measurement device equipped with a flight platform, which is considered as the development direction of the third generation of magnetic exploration because of its high magnetic field sensitivity, abundant information collection and small volume. The hexagonal pyramidal total tensor gradient module consists of a triaxial superconducting quantum interference (SQUID) magnetometer and six low temperature superconducting planar first-order SQUID gradient meters.The results show that in the multi-channel system , The crosstalk between SQUIDs obviously affects the measurement results.This paper analyzes the crosstalk of this superconducting total tensor magnetic gradiometer and measures the crosstalk data.After analyzing the factors affecting crosstalk, Distance and changing the way of connection, the structure of full-tensor module is optimized.The experimental results show that the new configuration module improves the crosstalk by more than an order of magnitude, which greatly improves the accuracy of the superconducting total-tensor magnetic gradiometer and Practicality.