A Preliminary Study on Detection of Muscle Activity using a Flexible AlN Piezoelectric Thin Film Sensor
Muscle activity can be used to generate control signals for prosthetic devices and human-assisting manipulators. Recently, a novel method has been developed to measure muscle movement using a flexible piezoelectric thin film sensor, which is made of oriented aluminum nitride (AIN) film. However, rigorous relationship between muscle activity and the sensors output has not been clarified. As a preliminary study, this paper proposes a simple model to illustrate the sensor output according to limbs cross-sectional dimensional change. Then, experiments have been carried out for comparison between muscle movement measurement methods using the AlN film sensor and ultrasound imaging. In the experiments, simultaneous measurement of signals of the AIN film sensor and ultrasonography was conducted during muscle actions. Both isokinetic and isometric muscle contractions were considered in the experiments. Since Youngs modulus of the AIN film sensor is significantly larger than those of skin, panniculus adiposus, and muscle layer, precise dimensional changes in muscles cannot be obtained from the proposed AIN film sensor based on a direct sensor attachment method. From the experimental results, however, it is found that times of contraction and relaxation indicated by the AIN film sensor agree well with the results obtained from ultrasonography. It is considered that the timing information of muscle activity can be detected with the AlN film sensor.
Nan Bu Osamu Fukuda Naohiro Ueno Masahiro Inoue
Measurement Solution Research Center,National Institute of Advanced Industrial Science and Technolog Institute of Intelligent Machines,Chinese Academy of Sciences
国际会议
2009 IEEE International Conference on Robotics and Biomimetics(2009 IEEE 机器人与仿生技术国际会议 ROBIO 2009)
桂林
英文
944-948
2009-12-19（万方平台首次上网日期，不代表论文的发表时间）