A Touch Sensing Technique Using the Effects of Extremely Low Frequency Fields on the Human Body.
A Touch Sensing Technique Using the Effects of Extremely Low Frequency Fields on the Human Body.
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DOI：
10.3390/s16122049
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发表时间：
2016-12-02
期刊：
影响因子：
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通讯作者：
Okamoto S
中科院分区：
文献类型：
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作者：
Elfekey H;Bastawrous HA;Okamoto S
触摸感测是人机接口中的基本方法，并且目前正在广泛使用。许多当前应用使用主动触摸感测技术。然而，无源触摸感测技术更适合于实现低功率或能量收集触摸感测接口。本文提出了一种被动式触摸传感技术的基础上，人体是由周围的极低频（ELF）电磁场，如那些交流电源线的影响。这些外部ELF场在人体上感应电势-因为人体组织在这些频率下表现出一定的导电性-导致所谓的交流嗡嗡声。因此，我们提出了一种被动触摸传感系统，检测这种嗡嗡声噪声时，人类触摸发生，从而区分触摸和非触摸事件。设计并实现了一个柔性触摸感应键盘，验证了该方法的有效性。
Touch sensing is a fundamental approach in human-to-machine interfaces, and is currently under widespread use. Many current applications use active touch sensing technologies. Passive touch sensing technologies are, however, more adequate to implement low power or energy harvesting touch sensing interfaces. This paper presents a passive touch sensing technique based on the fact that the human body is affected by the surrounding extremely low frequency (ELF) electromagnetic fields, such as those of AC power lines. These external ELF fields induce electric potentials on the human body—because human tissues exhibit some conductivity at these frequencies—resulting in what is called AC hum. We therefore propose a passive touch sensing system that detects this hum noise when a human touch occurs, thus distinguishing between touch and non-touch events. The effectiveness of the proposed technique is validated by designing and implementing a flexible touch sensing keyboard.