融合表面肌电和姿势信息的轮椅绩效评价方法  

Wheelchair Performance Evaluation Method Integrating Surface Electromyography and Posture Information

作　　者：王振宇[1] 向泽锐[1,2] 吕思龙 龙思雨 支锦亦[1,2] WANG Zhenyu;XIANG Zerui;LYU Silong;LONG Siyu;ZHI Jinyi(School of Design,Southwest Jiaotong University,Chengdu 611730,China;Institute of Design and Research for Man-Machine-Environment Engineering System,Southwest Jiaotong University,Chengdu 611730,China)

机构地区：[1]西南交通大学设计艺术学院,成都611730 [2]西南交通大学人机环境系统设计研究所,成都611730

出　　处：《包装工程》2024年第4期141-151,共11页Packaging Engineering

基　　金：国家重点研发计划项目(2022YFB4301203);教育部2022年第二批产学合作协同育人项目(220705329291641)。

摘　　要：目的为客观评价轮椅的使用效益,使用表面肌电设备测试轮椅使用过程中的肌电信号,并融合姿势信号IMU来构建人机评价模型。方法分别对轮椅的折叠、刹车方式及行驶坡度进行试验来评估轮椅的使用绩效,通过对比用力肌群间的疲劳状况来判定较为舒适的轮椅折叠及刹车方式。实验要求被试者在执行轮椅任务时,分别使用两种折叠方式和三种刹车方式不同的轮椅进行实验,并在操作动作任务过程中采集sEMG和IMU信号,在实验任务结束后填写NASA-TLX量表。结果根据模型的评价指标对实验数据进行了比较与分析,横向收折式折叠和凹口式刹车(手刹位于前方)的轮椅疲劳度低,在3~4°坡度范围下轮椅使用者的受力最小,较为舒适,从而验证了模型在轮椅人机评价上的可行性,为优化轮椅设计提供参考。结论人机评价模型适用于评估产品绩效,同时提出的融合表面肌电和姿势信息的轮椅绩效评价方法具有较高的精度和准确性,能够有效地评估轮椅使用者的绩效水平。The work aims to objectively evaluate the use effectiveness of wheelchair by using surface electromyog-raphic equipment to test the electromyographic signals during wheelchair use,and to construct a human-machine evalua-tion model by integrating posture signals from an inertial measurement unit(IMU).Folding,braking,and slope of the wheelchair were tested to evaluate its performance,and the fatigue condition between muscle groups was compared to determine the folding and braking methods that were beneficial to the wheelchair.The experimental subjects were re-quired to use two folding methods and three braking methods of different wheelchairs to perform the wheelchair tasks and to collect sEMG and IMU signals during the operational task process.After the experimental task,the NASA-TLX scale was filled out.Based on the evaluation indicators of the model,the experimental data were compared and analyzed.The wheelchair subject to horizontally folded folding and concave brake(hand brake in front)had less fatigue,and the user's force was minimal at a 3~4°slope range,which was more comfortable.This verified the feasibility of the model in wheelchair human-machine evaluation and provided a reference for optimizing wheelchair design.The human-machine evaluation model is suitable for evaluating product performance.Meanwhile,the wheelchair performance evaluation method proposed in this study,which integrates surface electromyography and posture information,has higher accuracy and can effectively evaluate the performance level of wheelchair users.

关 键 词：表面肌电 姿势信号 轮椅绩效 评价模型 惯性测量单元 

分 类 号：TP-391.4[自动化与计算机技术] TB472[一般工业技术—工业设计]