EXPERIMENTAL STUDY OF IONIC POLYMER TRANSDUCERS: CHARACTERIZATION OF TRANSIENT RESPONSE IN SENSING
EXPERIMENTAL STUDY OF IONIC POLYMER TRANSDUCERS: CHARACTERIZATION OF TRANSIENT RESPONSE IN SENSING
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离子聚合物传感器的实验研究：传感中瞬态响应的表征
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发表时间：
2014
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通讯作者：
Bilge Kocer Yumer
中科院分区：
文献类型：
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作者：
Bilge Kocer Yumer
离子聚合物传感器（IPT）在变形时显示出传感行为，从而产生电流信号。当跨换能器的表面施加电压差时，IPT也表现出弯曲变形，从而显示致动。然而，负责驱动和传感的机制不同;迄今为止的研究主要集中在驱动上，而负责IPT传感的基本物理机制的识别仍然是一个开放的话题。然而，IPT在传感、可靠、灵活、轻便和成本效益方面是有前途的。即便如此，人们对它们的了解仍然很少，这限制了它们的优化和随后的广泛应用。作为传感器，它们通常在弯曲模式下进行研究;然而，可以在任何机械变形模式下产生可测量的信号。本论文提供了流动电位假说的机制模型解释IPT传感的基础上，它是唯一能够预测的任何模式的变形的瞬态传感信号的存在。到目前为止，已经提出了弯曲和剪切下IPT瞬态传感响应的流动电位模型。然而，这些模型缺乏适当的瞬态实验研究进行验证;此外，完全没有对最终压缩感知模式进行研究。这篇论文提供了一个适合压缩的建模方法，同时也提供了实验研究，使验证研究的所有IPT传感模式。实验研究介绍了新的测试装置，使阶跃偏转应用在弯曲，剪切，压缩模式和现场测量所产生的瞬态IPT电流。最后，由于定义主要负责感测的物理机制的最终目标是使这些换能器的广泛使用，电极结构研究提供了通过流动电位假设来优化IPT感测的潜力的说明。
Ionic Polymer Transducers (IPTs) display a sensing behavior, whereby a current signal is generated, when they are deformed. IPTs also exhibit bending deformation when a voltage difference is applied across the surfaces of the transducer, thus displaying actuation. However, the mechanisms responsible for actuation and sensing differ; research to date has focused predominantly on actuation, while identification of the fundamental physical mechanism responsible for IPT sensing remains an open topic. Nevertheless, IPTs are promising in sensing, reliable, flexible, light, and cost effective. Even so, they are poorly understood, which has limited their optimization and subsequently their widespread application. As sensors they are most often studied in bending mode; however a measurable signal can be generated in any mode of mechanical deformation. This thesis offers the streaming potential hypothesis as the mechanistic model explaining IPT sensing on the basis that it is uniquely able to predict the existence of a transient sensing signal in any mode of deformation. To date, streaming potential models of IPT transient sensing response under bending and shear have been presented. These models, however, have lacked access to appropriate transient experimental studies for validation; moreover, there has been a complete absence of study of the final compressive sensing mode. This thesis offers a modeling methodology appropriate to compression, while also offering experimental studies enabling validation studies for all IPT sensing modes. The experimental studies introduce novel test rigs enabling step-deflection application in bending, shear, compression modes and in situ measurement of the resulting transient IPT current. Finally, because the ultimate goal of defining the physical mechanism primarily responsible for sensing is to enable widespread use of these transducers, electrode architecture studies are offered as illustration of the potential to optimize IPT sensing via the streaming potential hypothesis.