Design of a low-cost force insoles to estimate ground reaction forces during human gait

IF 2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

HardwareX Pub Date : 2024-09-27 DOI:10.1016/j.ohx.2024.e00589

Nelson E. Guevara , Carlos F. Rengifo , Yamir H. Bolaños , Daniel A. Fernández , Wilson A. Sierra , Luis E. Rodríguez

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Abstract

This paper proposes a low-cost electronic system for estimating ground reaction forces (GRF) during human gait. The device consists of one master node and two slave nodes. The master node sends instructions to slave nodes that sample and store data from two force insoles located at the participant’s feet. These insoles are equipped with 14 piezo-resistive FlexiForce A301 sensors (FSR). The slave nodes are attached to the ankles and feet of each participant. Subsequently, the start command is transmitted through the master node, which is connected to the USB port of a personal computer (PC). Once the walking session is completed, the information obtained by the slave nodes can be downloaded by accessing the access point generated by these devices through Wi-Fi communication. The GRF estimation system was validated with force platforms (BTS Bioengineering P6000, Italy), giving on average a fit measure equal to

68.71 % \pm 4.80 %

in dynamic situations. Future versions of this device are expected to increase this fit by using machine learning models.

Abstract Image

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设计用于估算人体步态过程中地面反作用力的低成本力垫

本文提出了一种用于估算人体步态过程中地面反作用力（GRF）的低成本电子系统。该装置由一个主节点和两个从节点组成。主节点向从节点发送指令，而从节点则对位于受试者脚部的两个受力鞋垫进行数据采样和存储。这些鞋垫配备了 14 个压阻 FlexiForce A301 传感器（FSR）。从节点连接在每位参与者的脚踝和脚掌上。随后，通过连接到个人电脑（PC）USB 端口的主节点传输开始指令。行走过程结束后，可通过 Wi-Fi 通信访问这些设备生成的接入点，下载从节点获得的信息。GRF估算系统经力平台（意大利 BTS 生物工程公司 P6000）验证，在动态情况下的平均拟合度为 68.71%±4.80%。该设备的未来版本有望通过使用机器学习模型提高拟合度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

HardwareX Engineering-Industrial and Manufacturing Engineering

CiteScore

4.10

自引率

18.20%

发文量

124

审稿时长

24 weeks

期刊介绍： HardwareX is an open access journal established to promote free and open source designing, building and customizing of scientific infrastructure (hardware). HardwareX aims to recognize researchers for the time and effort in developing scientific infrastructure while providing end-users with sufficient information to replicate and validate the advances presented. HardwareX is open to input from all scientific, technological and medical disciplines. Scientific infrastructure will be interpreted in the broadest sense. Including hardware modifications to existing infrastructure, sensors and tools that perform measurements and other functions outside of the traditional lab setting (such as wearables, air/water quality sensors, and low cost alternatives to existing tools), and the creation of wholly new tools for either standard or novel laboratory tasks. Authors are encouraged to submit hardware developments that address all aspects of science, not only the final measurement, for example, enhancements in sample preparation and handling, user safety, and quality control. The use of distributed digital manufacturing strategies (e.g. 3-D printing) is encouraged. All designs must be submitted under an open hardware license.