压电式步态分析系统在足底压力监测中的应用

The application of piezoelectric gait analysis system in plantar pressure monitoring

目的通过研究压电式步态分析系统在足底压力监测中的实际应用,为人体步态分析及其在临床医学及康复治疗作用提供参考。方法设计压电式步态分析系统,采集鞋垫中6个采集点的压力信号,通过蓝牙模块传输足底压力信号,并采用所设计手机APP和MATLAB软件分析和处理压力信号。结果利用MATLAB软件插值、颜色映射等功能绘制足底压力云图、压力中心蝴蝶图,通过测量双脚摆动相计算步行周期,手机APP实时监测足底压力以实现意外摔倒报警。结论该系统可实现站立姿态、平衡状态、步行周期及意外摔倒的监测,所得实验结果与临床研究结论基本保持一致,同时可穿戴式结构更适合于真实步行场景。

Objective To provide references for human gait analysis and its application in clinical medicine and re- habilitation through research on practical application of piezoelectric gait analysis system in plantar pressure moni- toring. Methods Piezoelectric gait analysis system was designed to collect pressure signals of six acquisition points in insole. The signals were transferred by bluetooth, and then analyzed and handled by APP and MAT- LAB. Results The plantar pressure cloud chart, center of pressure （COP） butterfly diagram were obtained by interpolation and color mapping in MATLAB, the walk cycle was calculated by measuring swing phase of both feet, and real time pressure monitoring was realized by mobile APP to give an accidental fall alarm. Conclusions The system can achieve monitoring of standing posture, state of equilibrium, walk cycle and accidental fall, and the experimental results are coincident with clinical research conclusions. Meanwhile, the wearable structure is more suitable in real walking scene.