JST  Vol.4 No.2 , June 2014
Flexible Impact Force Sensor
Abstract: When human body is punched by boxing glove, both body surface and boxing glove deform in a complex shape. The purpose of this study is to develop a flexible sensor that can be used in such interface. Firstly, several mechanical phenomena, which are the cause of the error signal of the sensor, are discussed. These are the influences of out-of-plane bending deformation, shear force caused by rubbing, shear force caused by the Poisson’s effect of contact material, and the lateral compressive force caused by the overhanging deformation of flexible material. Then, a prototype sensor that can eliminate the error factors of these is developed. The sensor is a distribution type impact sensor in which sixteen sensor elements are arranged in a 4 × 4 matrix. Punching experiments using a boxing glove are carried out by installing the sensor on the load cell, on the concrete wall and on the sandbag. From the experiment, it is found that the impact force can be measured with good accuracy by using the sensor. Despite the fact that the sensor has inadequate distribution number of sensor elements, the sensor structure meets mechanical requirements for the flexible impact sensor.
Cite this paper: Liu, C. , Fujimoto, Y. and Tanaka, Y. (2014) Flexible Impact Force Sensor. Journal of Sensor Technology, 4, 66-80. doi: 10.4236/jst.2014.42008.

[1]   Ishikawa, M. and Shimojo, M. (1982) A Method for Measuring the Center Position of a Two Dimensional Distributed Load Using Pressure-Conductive Rubber. Transactions of the Society of Instrument and Control Engineers, 18, 730-735.

[2]   Mei, T., Li, W.J., Ge, Y., Chen, Y., Ni, L. and Chan, M.H. (2000) An Integrated MEMS Three-Dimensional Tactile Sensor with Large Force Range. Sensors and Actuators, 80, 155-162.

[3]   Lee, H.K., Chang, S.I. and Yoon, E. (2006) A Flexible Polymer Tactile Sensor: Fabrication and Modular Expandability for Large Area Deployment. Journal of Micro Electromechanical Systems, 15, 1681-1686.

[4]   Donati, M., Vitiello, N., De Rossi, S.M.M., Lenzi, T., Crea, S., Persichetti, A., Giovacchini, F., Koopman, B., Porobnik, J., Munih, M. and Carrozza, M.C. (2013) A Flexible Technology for the Distributed Measurement of Interaction Pressure. Sensors, 13, 1021-1045.

[5]   Lee, M.H. and Nicholls, H.R. (1999) Review Article Tactile sensing for Mechatronics—A State of the Art Survey. Mechatronics, 9, 1-31.

[6]   Lumelsky, V.J., Shur, M.S. and Wagner, S. (2001) Sensitive Skin. IEEE Sensors Journal, 1, 41-51.

[7]   Walilko, T.J., Viano, D.C. and Bir, C.A. (2005) Biomechanics of the Head for Olympic Boxer Punches to the Face. British Journal of Sports Medicine, 39, 710-719.

[8]   Fujimoto, Y. and Setyanto, A.T. (2007) Sheet Type Impact Force Sensor by the Use of Piezoelectric Film. Transactions of the Japan Society of Mechanical Engineers, Series C, 73, 184-191. (in Japanese)

[9]   Fujimoto, Y., Shintaku, E., Tanaka, Y. and Fujiyoshi, J. (2012) Pad Type Compressive Force Sensor Suitable for High-Speed Impact Force Measurement. Transactions of the Japan Society of Mechanical Engineers, Series C, 78, 2438-2449. (in Japanese)

[10]   Fujimoto, Y., Liu, C., Uesugi, T., Tanaka, Y. and Shintaku, E. (2013) Pipe Surface Sensor for Impulsive Force Measurement. Transactions of the Japan Society of Mechanical Engineers, Series C, 79, 113-123. (in Japanese)

[11]   Shinkai, H., Nunome, H., Ikegami, Y. and Isokawa, M. (2008) Ball-Foot Interaction in Impact Phase of Instep Soccer Kick. In: Reilly, T. and Korkusuz, F., Eds., Science and Football VI, The Proceedings of the 6th World Congress on Science and Football, Routledge, Abingdon, 41-46.