用于可穿戴式测量COP坐标的足底压力传感单元配置。
The configuration of plantar pressure sensing cells for wearable measurement of COP coordinates.
作者信息
Wang Dian, Cai Ping, Mao Zhiyong
机构信息
School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Shanghai Engineering Research Center for Intelligent Diagnosis and Treatment Instrument, Shanghai, 200240, China.
出版信息
Biomed Eng Online. 2016 Oct 26;15(1):116. doi: 10.1186/s12938-016-0237-3.
BACKGROUND
Wearable measurement of center of pressure (COP) coordinates is the key of obtaining the measurement of natural gait. Plantar pressure insole is the right sensing unit for plantar pressure monitoring for long-term outdoor measurements and the control of walking assisting exoskeleton robot. It's necessary to study the configuration of pressure sensing cells.
METHODS
This study explored the sensing cell configuration for the plantar pressure insole. The data of plantar pressure of walking is collected for layout variants. The RMSE of COP coordinates estimations are used as the evaluation criteria.
RESULTS
The RMSE of COP coordinates decreases from 8.00 to 3.20 mm as the amount of pressure sensing cells increases from 2 to 7. The size of pressure sensing cells contribute to reduce the RMSE of COP coordinates and 7 pressure sensing cells, with the size of 2.0-2.5 cm have the satisfying performance. Adding pressure sensing cell in the heel and hallux area increase the accuracy of estimating COP coordinates.
CONCLUSION
Comparison results indicate that the configuration of 7 pressure sensing cells has a satisfying measurement performance.
背景
可穿戴式压力中心（COP）坐标测量是获取自然步态测量结果的关键。足底压力鞋垫是用于长期户外测量和步行辅助外骨骼机器人控制的足底压力监测的合适传感单元。研究压力传感单元的配置很有必要。
方法
本研究探讨了足底压力鞋垫的传感单元配置。收集步行时的足底压力数据用于布局变体。COP坐标估计的均方根误差（RMSE）用作评估标准。
结果
随着压力传感单元数量从2个增加到7个，COP坐标的RMSE从8.00毫米降至3.20毫米。压力传感单元的尺寸有助于降低COP坐标的RMSE，7个尺寸为2.0 - 2.5厘米的压力传感单元具有令人满意的性能。在足跟和拇趾区域添加压力传感单元可提高COP坐标估计的准确性。
结论
比较结果表明，7个压力传感单元的配置具有令人满意的测量性能。
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