Brown P, Whiteside B J, Beek T J, Fox P, Horbury T S, Oddy T M, Archer M O, Eastwood J P, Sanz-Hernández D, Sample J G, Cupido E, O'Brien H, Carr C M
Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom.
EMM-NANO Consortium, K.U. Leuven, 3000 Leuven, Belgium.
Rev Sci Instrum. 2014 Dec;85(12):125117. doi: 10.1063/1.4904702.
We report on the design and development of a low resource, dual sensor vector magnetometer for space science applications on very small spacecraft. It is based on a hybrid device combining an orthogonal triad of commercial anisotropic magnetoresistive (AMR) sensors with a totem pole H-Bridge drive on a ceramic substrate. The drive enables AMR operation in the more sensitive flipped mode and this is achieved without the need for current spike transmission down a sensor harness. The magnetometer has sensitivity of better than 3 nT in a 0-10 Hz band and a total mass of 104 g. Three instruments have been launched as part of the TRIO-CINEMA space weather mission, inter-calibration against the International Geomagnetic Reference Field model makes it possible to extract physical signals such as field-aligned current deflections of 20-60 nT within an approximately 45,000 nT ambient field.
我们报告了一种用于非常小型航天器的空间科学应用的低资源双传感器矢量磁力计的设计与开发。它基于一种混合装置，该装置将商用各向异性磁阻（AMR）传感器的正交三元组与陶瓷基板上的图腾柱H桥驱动器相结合。该驱动器可使AMR在更灵敏的翻转模式下运行，并且无需通过传感器线束传输电流尖峰即可实现这一点。该磁力计在0 - 10 Hz频段内的灵敏度优于3 nT，总质量为104 g。作为TRIO - CINEMA空间天气任务的一部分，已发射了三台仪器，通过与国际地磁参考场模型进行相互校准，可以在约45,000 nT的环境场中提取诸如20 - 60 nT的场向电流偏转等物理信号。
