Ultrasensitive Multifunctional Magnetoresistive Strain Sensor Based on Hair-Like Magnetization-Induced Pillar Forests
Ultrasensitive Multifunctional Magnetoresistive Strain Sensor Based on Hair-Like Magnetization-Induced Pillar Forests
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基于毛发状磁化柱林的超灵敏多功能磁阻应变传感器
DOI：
10.1002/aelm.201900653
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发表时间：
2019-10-11
影响因子：
6.2
通讯作者：
Gong, Xinglong
中科院分区：
文献类型：
--
作者：
Ding, Li;Pei, Lei;Gong, Xinglong
提出了一种集触觉传感和磁传感于一体的超灵敏多功能传感器。该传感器被称为L-MPF，由两个联锁的头发状磁化诱导柱森林组成，它们在磁场和负载压力下自行形成。L-MPF赋予智能电子设备磁场接收能力，这是细菌，鸟类和鲸鱼的感觉，而不是人类。结果表明，L-MPF能够精确地检测动态载荷的大小和加载路径，包括压力、剪切和磁场，具有响应速度快、可逆性高、灵敏度高和稳定性好等特点。在50-60%压应变、0-3.4度剪应变和21-170 mT磁场下，灵敏度系数分别达到1965、1.6和240%T-1。此外，应变灵敏度系数可以通过外部磁场来设置，这提供了一种潜在的途径，以实现不同的传感要求，在不同的情况下。为了深入了解传感元件的行为，还通过简化的模型仿真和理论分析描述了磁-机-电耦合响应。此外，4 x 4 L-MPF阵列具有非接触式手势传感功能，为下一代人机接口设备和人工电子皮肤提供了新的途径。
An ultrasensitive multifunctional sensor which integrates tactile sensing and magnetism sensing together in one device is presented. The sensor, dubbed L-MPF, consists of two interlocking hair-like magnetization-induced pillar forests, which are self-formed under a magnetic field and a loading pressure. An L-MPF endows intelligent electronics with magnetic field reception, which is the sense of bacteria, birds, and whales, rather than human beings. It is found that the L-MPF precisely detects the magnitude and the loading path of the dynamic load, including pressure, shear, and magnetic field, with fast response, high reversibility, excellent sensitivity, and high stability. The sensitivity coefficient can reach 1965, 1.6, and 240% T-1 under 50-60% compressive strain, 0-3.4 degrees shear strain, and 21-170 mT magnetic field. Additionally, the strain sensitivity coefficient can be set by the external magnetic field, which affords a potential approach to realize different sensing requirements in various circumstances. For a detailed insight into the sensing element's behavior, the magnetic-mechanic-electric coupling response is also described by simplified model simulation and theoretical analysis. Furthermore, a 4 x 4 L-MPF array exhibits contactless gesture sensing, which provides a new way for next-generation human-electronics interface devices and artificial electronic skin.