Martínez-Martí Fernando, Martínez-García María Sofía, García-Díaz Santiago G, García-Jiménez Javier, Palma Alberto J, Carvajal Miguel A
ECsens, Departamento de Electrónica y Tecnología de Computadores, ETSIIT, Universidad de Granada, 18071, Granada, Spain,
Australas Phys Eng Sci Med. 2014 Mar;37(1):25-35. doi: 10.1007/s13246-013-0236-7. Epub 2013 Dec 31.
This work presents the development of a portable, wireless activity monitoring system for the estimation of biomechanical gait parameters. The system uses a pair of instrumented insoles able to measure pressure from different points of the foot including four commercial piezoresistive pressure sensors and a three-axis accelerometer, all together integrated in the insole to determine foot forces during stance and swing phases. The system includes two kinds of analysis data, one on line with a RF communications to a computer, and another off line reading the data from SD memory card. Our system has been validated and tested in different trials, extracting several features during walking for ten participants by means of the combined information from the two kinds of sensors. With the combined data from the complete set of sensors, we can obtain highly valuable information on foot movement during the non-contact period, such as supination or pronation characteristics or anomalous movement during flight time. From our preliminary results, the variation of the lateral acceleration of the foot seems to be correlated with the amount of supination.
这项工作展示了一种用于估计生物力学步态参数的便携式无线活动监测系统的开发。该系统使用一对装有仪器的鞋垫，能够测量来自足部不同点的压力，包括四个商用压阻式压力传感器和一个三轴加速度计，所有这些都集成在鞋垫中，以确定站立和摆动阶段的足部力量。该系统包括两种分析数据，一种通过射频通信在线传输到计算机，另一种离线从SD存储卡读取数据。我们的系统已经在不同的试验中得到验证和测试，通过两种传感器的组合信息，为十名参与者在行走过程中提取了几个特征。利用整套传感器的组合数据，我们可以获得关于非接触期足部运动的非常有价值的信息，例如旋后或旋前特征或飞行时间内的异常运动。从我们的初步结果来看，足部横向加速度的变化似乎与旋后量相关。
