Development of sensing/actuating ionic polymer-metal composite (IPMC) for active guide-wire system
Development of sensing/actuating ionic polymer-metal composite (IPMC) for active guide-wire system
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DOI：
10.1016/j.sna.2009.12.001
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发表时间：
2010-03-01
影响因子：
4.6
通讯作者：
Ju, Ming-Shaung
中科院分区：
文献类型：
--
作者：
Fang, Bo-Kai;Lin, Chou-Ching K.;Ju, Ming-Shaung
离子聚合物-金属复合材料（IPMC）的大变形潜力在生物医学器件和微型机器人的发展中具有重要意义。本研究的目的是探讨开发一种传感/驱动IPMC传感器作为心导管主动导丝头部的可行性。该方法采用幅度调制解调技术，以获得从IPMC电极中的电阻的变化转换的变形传感信号。根据溶剂和吸附条件，制备了三种类型的IPMC，并测试了其传感和驱动功能。此外，用IPMC导丝模拟了导管插入过程。从估计和实验结果，传感信号和代表的IPMC的变形的尖端位移之间的关系进行了验证。在小变形时，传感信号与尖端位移成正比。三种IPMC的变形敏感性试验表明，IPMC的变形敏感性与材料加工条件和溶剂有关。此外，IPMC的传感和致动功能之间存在折衷。在传感/执行IPMC的设计中。施加在IPMC上用于致动的电功率可能由于IPMC中溶剂的迁移而中断感测信号。区分变形的IPMC和未变形的IPMC之间的变形感测信号可以减轻干扰。模拟导管插入术的演示展示了在检查血管分叉时感测/致动IPMC的潜力，而无需集成庞大的传感器或调整基于IPMC的主动导丝的曲率。(C)2009 Elsevier B. V.保留所有权利。
The potential for large deformation of the ionic polymer-metal composite (IPMC) is useful in the developments of biomedical device and miniature robot. The goal of this study is to investigate the feasibility of developing a sensing/actuating IPMC transducer as the head of an active guide-wire for cardiac catheterization. The approach employs an amplitude modulation-demodulation technique to obtain a deformation-sensing signal converted from the variation of electrical resistances in the IPMC electrodes. According to solvents and uptake conditions, three types of IPMC were produced and tested for the sensing and the actuating functions. Besides, a simulation of catheterization procedure was demonstrated with an IPMC guide-wire. From the estimated and the experimental results, the relationship between the sensing signal and the tip-displacement representing the deformation of the IPMC was verified. The sensing signal was proportional to the tip-displacement in the small deformation. The tests of the three types of IPMC showed that the sensitivity of deformation depended on the condition of material processing and solvent in IPMC. In addition, there was a trade-off between the sensing and the actuating functions of the IPMC. In the design of sensing/actuating IPMC. the electric power applied on the IPMC for actuation may interrupt the sensing signal with the migration of solvent in the IPMC. Differentiating the deformation-sensing signals between the deformed IPMC and an undeformed IPMC may alleviate the interference. The demonstration of a simulated catheterization exhibited the potential for sensing/actuating IPMC in checking the bifurcation of blood vessels without integrating a bulky sensor or adjusting the curvature of an IPMC-based active guide wire. (C) 2009 Elsevier B.V. All rights reserved.