10 April 2008 Frequency response characteristics of IPMC sensors with current/voltage measurements
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This paper discusses a model of IPMC sensors and the characteristics of the frequency responses. There are two different methods of measurements, the current sensing and the voltage sensing, which exhibit completely different frequency responses each other. A simple model based on Onsager's equation is shown in order to explain the experimental results of the current sensing. The voltage sensing model is derived by the equivalent transform of the voltage and the current sources. In contrast to the constant gain of the charge response, the characteristics of the voltage response are directly related to the impedance dynamics. In the experiments, the frequency responses of the charge/current sensing and the voltage sensing for two species of counter ion are measured. The ratio of the obtained frequency responses and the measured impedance are also compared to validate the voltage sensing model. Though the theoretical prediction of the sensor coefficient does not match the experimental one, the structure of the model agrees with the experimental data.
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Kentaro Takagi, Kentaro Takagi, Norihiro Kamamichi, Norihiro Kamamichi, Boyko Stoimenov, Boyko Stoimenov, Kinji Asaka, Kinji Asaka, Toshiharu Mukai, Toshiharu Mukai, Zhi-Wei Luo, Zhi-Wei Luo, "Frequency response characteristics of IPMC sensors with current/voltage measurements", Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 692724 (10 April 2008); doi: 10.1117/12.776189; https://doi.org/10.1117/12.776189

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