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首页> 外文期刊>Sensors Journal, IEEE >A Resettable, Wireless and Passive Fall-Down Recorder Using a Magnetic Droplet With an Circuit
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A Resettable, Wireless and Passive Fall-Down Recorder Using a Magnetic Droplet With an Circuit

机译：使用带有电路的磁滴的可复位，无线和无源跌落记录仪

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摘要

A fall-down recorder can record the happening of an object falling down during object delivery or transportation, even after the object is recovered to its initial state. Here, a resettable, wireless and passive fall-down recorder is proposed by integrating a droplet-based inertial force switch with the inductor–capacitor () circuit for wireless signal transmission. A magnetic droplet is used in the switch with a converging microchannel to control the desired threshold acceleration. When the inertial force exceeds the designed threshold acceleration, the magnetic droplet will pass through the converging microchannel to a deep cavity to become a different state. By connecting the switch with the sensing circuit, the state of the recorder can be wirelessly identified through the resonant frequency. After triggering, this switch can be remotely reset to its initial state by an external magnet. A proper hydrophobic surface treatment is employed to facilitate the movement of the magnetic droplet and reduce the variation on the threshold acceleration. The capabilities, including switching, recording, wireless reading, and resetting of the proposed fall-down recorder, are successfully designed, fabricated, and verified with ten recording-reset tests.
机译：跌倒记录器即使在将对象恢复到其初始状态后，也可以记录在对象传送或运输过程中对象掉落的情况。在这里，通过将基于墨滴的惯性力开关与用于无线信号传输的感应器-电容器（）电路集成在一起，提出了一种可复位的无线被动跌落记录仪。在开关中使用具有融合微通道的磁滴来控制所需的阈值加速度。当惯性力超过设计的阈值加速度时，磁滴将通过会聚的微通道到达深腔，从而变为不同的状态。通过将开关与传感电路连接，可以通过谐振频率无线识别记录器的状态。触发后，此开关可通过外部磁铁远程复位到其初始状态。采用适当的疏水性表面处理以促进磁滴的移动并减少阈值加速度的变化。所提议的跌倒记录仪的功能（包括切换，记录，无线读取和重置）已成功设计，制造并通过十次记录重置测试进行了验证。

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