Research On The Human Body Tactile Sensing Device System Based On The Theory Of Oscillation Resonance

Older adults,patients with diabetic neuropathy,and patients with stroke exhibit a marked deficit in the perception of cutaneous and component of the balance control system.Such changes to the somatosensory system,which have been associated with increases in mechanoreceptor detection thresholds,may predispose individuals to falls and bring a lot of trouble.Accordingly,in this paper,a set of human tactile transducer devices is designed,which based on the research results and mechanism of the vibrational resonance theory in the somatosensory system.Firstly,this paper introduces the physiological basis of the human nervous system,and has analyzed the mechanism of the mechanoreceptor detecting proprioceptive stimuli in detail.According to the theoretical model of the vibrational resonance in the detection and transmission of weak signals in certain nonlinear systems,results has proved that the optimal amplitude of the high frequency noise may make the maximum output of SNR,which provides a theoretical basis for the device.Secondly,this paper has completed the hardware design of the device,according to the system solution.This device adopts an embedded platform of STM32F103ZET6 as the main micro-controller.This device processes the attitude features of elderly people's activities based on MPU6050 acceleration transducer.The computer can monitor the sampled data through CP2012,and display and record the sampled data by software miniMN in real time.According to the acceleration values,the main micro-controller 's timer generate PWM signals,which drive the micro motor to generate vibration stimulation of different high frequencies that improve sensorimotor function in older adults and patients with sensory deficits.Then,the system program development is completed based on the embedded development environment KEIL-MDK V5.0.The design of software has adopt module design method,including the main console program,the user's posture information detection program,the tactile displaying program,the key control program,and the human-machine interaction program,which is compiled correctly.Finally,the device online debugging of hardware and software is done,and the test results are analyzed.The experimental results show that the device can measure the user's gesture in real-time,and can elicit vibrational stimulation rapidly.This research provides the experimental foundation of vibrational resonance in human sense perception system,and has the potential application value.