A Wireless, Passive Load Cell based on Magnetoelastic Resonance.
A Wireless, Passive Load Cell based on Magnetoelastic Resonance.
复制标题
基于磁弹性谐振的无线无源称重传感器。
DOI：
10.1088/0964-1726/21/7/075018
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发表时间：
2012
影响因子：
4.1
通讯作者：
Ong,KeatGhee
中科院分区：
文献类型：
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作者：
Pereles,BrandonD;Dienhart,Thomas;Sansom,Thadeus;Johnston,Kyle;Ong,KeatGhee
基于振动磁弹性条在交流磁场作用下的共振频移，制作了一种无线无电池称重传感器。由于磁弹性条的振动产生二次场，因此使用线圈远程检测共振。当通过圆棒施加器将载荷施加到磁弹性条表面的一小块区域时，由于其振动的衰减，共振频率和振幅降低。通过改变施力器的大小并将施力器放置在带材表面的不同位置来控制力传感器的力灵敏度。实验结果表明，较大的涂布器放置在带材边缘附近时，力敏感度增加。这种称重传感器的新颖之处不仅在于它的无线无源特性，而且还在于力灵敏度的可控性。
A wireless, battery-less load cell was fabricated based on the resonant frequency shift of a vibrating magnetoelastic strip when exposed to an AC magnetic field. Since the vibration of the magnetoelastic strip generated a secondary field, the resonance was remotely detected with a coil. When a load was applied to a small area on the surface of the magnetoelastic strip via a circular rod applicator, the resonant frequency and amplitude decreased due to the damping of its vibration. The force sensitivity of the load cell was controlled by changing the size of the force applicator and placing the applicator at different locations on the strip's surface. Experimental results showed that the force sensitivity increased when a larger applicator was placed near the edge of the strip. The novelty of this load cell is not only its wireless passive nature, but also the controllability of the force sensitivity.