Design And Research Of Plantar Hydraulic Control Device For Body Weight Support Treadmill Training

At present,the number of patients with lower limb movement disorders caused by aging,accidental injuries,diseases,and other factors is increasing in China.Lower limb movement disorders have brought great inconvenience and burden to patients’ lives,work,and psychology.With the continuous improvement of living standards,people attach more importance to high-quality rehabilitation.Therefore,how to improve walking ability and restore normal life as soon as possible is the first wish of patients with lower limb movement disorders,it is also an important aspect of rehabilitation medicine research.Early rehabilitation of patients with lower limb movement disorders mainly relies on human gait training under different load-bearing conditions,thus various weight reduction technologies targeting the field of rehabilitation medicine have emerged in front of people.This article proposes a plantar fluid controlled weight-loss walking training device,which can effectively protect patients’ feet,slow down the fluctuation range of pre weight reduction,and make rehabilitation training safer and more efficient while ensuring normal weight-loss walking training for patients.First of all,the weight reduction methods of weight-loss training at home and abroad are fully investigated and analyzed.According to the characteristics of human walking movement and clinical rehabilitation principles,the overall scheme and design requirements of the plantar hydraulic weight-loss walking training device are proposed.Based on the size of human feet and the principle of device weight reduction,the plantar hydraulic control device and weight reduction system are designed in detail and the strength of key components is checked.Establish and analyze the man-machine mathematical model and propose the system control scheme according to the characteristics of the device.Secondly,the hyperelastic finite element analysis of the flexible element,the core of the plantar hydraulic control device,is carried out.Based on the uniaxial tensile test data and the material evaluation results of ABAQUS software,the constitutive model of the thermoplastic polyurethane material is determined.Aiming at the complex nonlinear behavior of the flexible element,the mechanical analysis is carried out and the constant load and pressure filling experiment is proposed to linearize its mechanical characteristics.Thirdly,the hardware and software of the device are designed.Based on the modular idea,the system hardware is analyzed and selected in blocks,and the electrical system is designed according to the characteristics of each part of the hardware.The system software is layered according to the actual rehabilitation needs,and each function is introduced and designed in detail,and the human-computer interface is made.Finally,the experimental prototype of the plantar hydraulic weight-loss walking training device was built and the walking experiments of landing buffer and weight-loss gait were carried out to verify the buffering effect of the device on the ground reaction force and the alleviation effect on the pre-gravity reduction,and the weight-loss walking training method and evaluation index were proposed according to the walking characteristics of patients.