Exynos4412-based Multi-Channel Limb Movement And Functional Rehabilitation Embedded Control System Design

Since there is a large number of patients with paralysis in current society,the research of paralytic limb movement function rehabilitation has become a hot research topic in the field of rehabilitation medicine.At present,the neuromuscular electrical stimulation(NMES)is widely used in many medical rehabilitation instruments,in which electrical stimulation is applied on peripheral nervous system,producing artificial action potential in the surrounding muscles,and then accomplishing the set action.Our research group developed a movement function reconstruction system based on communication principle and the electromyographic(EMG)signal control,research and development of motor function reconstruction system based on communication theory and EMG control,in order to overcome the traditional neuromuscular electrical stimulation to stimulate a single model,the lack of active participation of the shortcomings of the patient.However,However,the functions of the previous R&D system were not comprehensive enough,with a single main control function,unfriendly human-machine interaction,and the lack of a single functional stimulation pulse.In this paper,based on the early research in EMGB system,a new type of multi-channel limb rehabilitation control system has been designed.The control system is controlled by an Exynos4412 chip as a master processor.,wiith STM32F103 circuit,MF RC522 RF circuit,OTG download circuit and other peripheral circuits to achieve the control system.This paper needs to customize the Linux kernel that is applicable to this hardware system and transplant the Linux kernel and Android system into the hardware environment.This article will divide the multi-channel limb tester control system into detailed descriptions from the following four subsystems:Based on the RFID-based patient registration and login system,Exynos 4412 and MF RC522 communicate with each other through SPI communication to read and write RF cards,to identify the patient's RF card,and to realize the patient's login to the system,to call the patient's customized treatment program for patient recovery treatment.Based on the SQLite-based patient information management system,SQLite database is created in the Android-side application,and an appropriate table is created to record basic information such as the patient's name,gender,and age,as well as myoelectric signals,general functional electrical stimulation patterns,and other patterns.Stimulation parameter information,and additions,deletions,and alterations of patient information,are used to manage basic patient information and treatment parameters.Any parameter stimulation pulse generation system,this part is realized on the STM32 side,through the precise control of the timer and the driving of the DAC,the stimulation pulse width,the stimulation frequency,the stimulation duration,the on-off time ratio,and the stimulation pulse with the adjustable treatment duration can be realized.,improve the shortcomings of the previous ordinary FES can only generate a specific parameter pulse.The main part of the Android main control interface design,including the choice of the stimulation mode,the general FES mode parameter settings,patient information,etc.,and through the UART to achieve STM32F103 communication mode selection and specific stimulation pulse generation and other operations.This system has a very strong expansion,and it can expand more application directions based on each module.In addition,the Exynos4412 platform also helps the system to expand into the Internet medical field,greatly accelerating the optimization and innovation process of the system.