Design And Implementation Of The Human Lower Limb Gait Analysis System

Walking requires the participation and close coordination of multiple muscles and joints in the brain,cerebellum,spinal nerves and lower extremities.Any part of the problem will lead to abnormal walking function,and all the forms of expression are different.For example,patients with impaired cerebellum or vestibular function often appear in a drunken gait with inconsistent body movements and unstable movements.By analyzing the gait of the human body,it can assist the doctor to accurately diagnose the degree of damage of the walking function and propose a personalized recovery plan.At this stage,doctors mainly observe the gait of the patients walking by the naked eye,and give the diagnosis results according to the patient's walking state and rough classification method.This traditional method relies on the doctor's experience very much and can not establish a unified standard.Three dimensional gait analyzer can be used in hospitals with advanced conditions.The advantage of the 3D gait analyzer is that it can obtain gait information and give full,accurate and reliable gait parameters,but it can not be extended in a large range because of its high price and the need for professional personnel to operate.In order to get the quantitative gait parameters and reduce the use threshold,this paper designs a human gait analysis system.The system consists of data acquisition equipment and gait analysis software,in which data acquisition devices include 7 data acquisition nodes and 1 data converging nodes.The functions of the data acquisition node mainly include collecting ADI inertial sensor data and packing data into data buffer,receiving the command of the converging node through the W5500 Ethernet communication module and sending data to the data gathering node through the W5500 Ethernet communication module to send data buffer.The functions of the data converging node mainly include response key events,the start and stop of the acquisition process based on the different keys,the BIN file is created in the Micro SD card and the data of the data acquisition node received through the W5500 Ethernet communication module is stored in the BIN file of the corresponding file name of the Micro SD card.After the data acquisition,the Micro SD card is inserted into the PC by the reader card reader.The gait analysis software in the PC machine reads the original data in the Micro SD card and calculates and processes the gait parameters.Finally,in order to verify the performance of the gait analysis system,8 volunteers were tested and 4 tests were taken for each volunteer.It was found that the gait parameters obtained by the gait analysis software were very small in the gait parameters measured by the tape measure,stopwatch and goniometer,and the gait of the human lower limb designed in this paper was verified.The effectiveness of the system is analyzed.