Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 175-181.doi: 10.13475/j.fzxb.20181104507

• Management & Information • Previous Articles     Next Articles

Prediction model and analysis of foot-ground reaction force based on pressure insole

WANG Hongcheng1, LANG Runnan1, WANG Fangfang2(), XU Fengyu1, SHEN Jingjin1   

  1. 1. College of Automation & College of Artificial Intelligence, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China
    2. School of Textile and Clothing, Nantong University Nantong, Jiangsu 226019, China
  • Received:2018-11-15 Revised:2019-08-04 Online:2019-11-15 Published:2019-11-26
  • Contact: WANG Fangfang E-mail:wffsjj@ntu.edu.cn

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Abstract:

In order to facilitate the doctor to remotely monitor the foot-ground reaction of the patient in daily life, an insole type foot pressure measurement system was designed. In the dynamic measurement of the plantar pressure, the analog signal of the pressure sensor is amplified, filtered and digital-analog converted, sent to the SQL database through the Zigbee wireless module, and the remote reading of the plantar pressure is realized by using the LabVIEW post-processing program. Based on the plantar pressure data, a multivariate linear regression model was used to establish a multivariate linear regression model of the foot-to-ground reaction. It was found that the FSR402 sensor has a high precision when measuring the pressure below 10 N, and the accuracy is significantly reduced when the pressure reaches 10 N and above. The insole pressure measurement system uses 0.248 8% and 0.731 8% of the error between the measured and predicted values measured by two comparison experiments, which is within the acceptable error range for engineering applications, the resulting error and the cause of negative predictive power is the accuracy of the sensor and the viscoelasticity between the foot and the insole.

Key words: foot-ground reaction force, insole, plantar pressure, smart wearable device, viscoelasticity

CLC Number: 

  • TS943.3

Fig.1

Voltage-pressure curve"

Fig.2

Overall layout of pressure sensor"

Fig.3

Signal amplification circuit diagram"

Fig.4

Wireless transmission hardware picture"

Fig.5

Flow chart of coordinator creating a network"

Fig.6

Graphical display interface diagram"

Fig.7

Experimental diagram"

Fig.8

Verification experiment 1(a) and 2(b)"

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