Design,Construction And Experiment Of SEMG-Detecting Circuit For EMG-Bridge

In China,there are about 85 million people suffering from all types of disabilities and among them more then 24 million are physically disabled.A great number of those physical disabilities are caused by spinal cord injury,stroke or peripheral nerve injury.Paraplegia is due to the damage of the neural signal pathway from brain to limbs,so that the motor and sensory neural signals can not be transmitted,thus the paraplegic is resulted.Hemiplegia is caused by the damage of cerebral nerve tissue,so that the brain is barely able or unable to produce movement controlling signals.Limb paralysis is due to peripheral nerve injury,so that the peripheral nerves of the limbs loss the motor sensory function.Therefore,studies on the therapies of paraplegia and hemiplegia have significant scientific significance and clinical application.In this case,based on the "Embedded microelectronics,neural channel bridging SOC" proposed by our research group,we further developed a EMG-Bridge(EMGB)to avoid the infection during the surgical implantation.As an movement control signal,the surface electromyography(sEMG)implying the force of the contracting muscle,can be used as a source or reference signal of surface FES(Functional Electrical Stimulation).This paper mainly completed the design of a sEMG-detection circuit,and applied the circuit to the design of the eight channel sEMG detection system and the "magic hand" glove.Finally,an eight-channel microelectronic neuromuscular bridge is desiged for realizing the multiple action real-time control between two different healthy people.First of all,this thesis analysed the physiological basis of electromyography signals and the characteristics of human sEMG signals.According to the principle,a sEMG detection circuit has been designed,after completion,hardware test and EMG signal measurement has been done.Then,based on the sEMG detection circuit,a eight channel sEMG detection system has been designed.The hardware of the system mainly consists of a power supply unit,a surface EMG signal detection circuit,and peripheral interface units and the software of the system includes the ADC data acquisition program,the serial data sending program,the serial data receiving program,the data display and storage program.In addition,the sEMG detection circuit was also used in the "magic hand" glove.After that,a multichannel sEMG detection system was studied for the development of miniaturization and wearable using the ADS 1299 chip combined with the STM32F407 microprocessor chip with DSP.In the end,the combination experiments of the eight channel microelectronic neuromuscular bridge system's multichannel bridge mode and "magic hand" mode and the detection system was conducted,achieving that a healthy person drove another healthy person to complete the real-time control of four types actions of grip,wrist extension,wrist flexion,finger extension,moreover expecting the functional reconstruction of the hand movement between the control and the controlled side.