Abstract
In this study, based on the characteristics of magnetic steel, we developed a somatosensory tactile actuator which could generate constant low-frequency vibration stimulation. Moreover, based on the relationship between input stresses and output voltages of polyvinylidene fluoride (PVDF) membrane working as a piezoelectric film sensor, a dynamic calibration system for stimulator’s output frequencies was designed later. We could get the actual excitation frequency of actuator based on spectral analysis of the output voltage of PVDF membrane. And so the output frequency of controller could be collected according to the frequency calibration curves ultimately. Experimental results showed that the errors between the expected output frequencies of controller and the actual measured frequencies of the actuator were quite small. The calibration table was given according to the fitting curve in the end. It can be looked forward that the developed actuator would lay a good hardware foundation for carrying out BCI experimental study based on steady-state somatosensory evoked potentials (SSSEPs) next.
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Acknowledgments
The authors would like to thank the financial support of the National Natural Science Foundation of China (Grant no. 61104206) and the Natural Science Foundation of Anhui Province (Grant no. 1208085QF121). We are very grateful to the unknown referees for their valuable remarks.
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Wang, H., Li, B., Song, A., Song, Q. (2015). The Design and Implementation of a Somatosensory Tactile Actuator and the Dynamic Calibration System for Its Output Frequencies. In: Deng, Z., Li, H. (eds) Proceedings of the 2015 Chinese Intelligent Automation Conference. Lecture Notes in Electrical Engineering, vol 337. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46463-2_5
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DOI: https://doi.org/10.1007/978-3-662-46463-2_5
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