WiFi Internet Of Things+Skin Resistance Detection And Its Application In Sympathetic Nerve Function Assessment

The stability of the autonomic nervous system is very important for human health.However,with the acceleration of social rhythm and the increase in work pressure,more and more patients have autonomic nervous system diseases.If these diseases are not treated,they will adversely affect the nervous system,exacerbate further disorders of the system,seriously cause diseases such as myocardial infarction and endanger life.Therefore,it is important to find a scientific and effective method to evaluate the autonomic nervous system.Skin resistance is only regulated by the sympathetic nervous system,which is one of the indicators that can objectively and effectively evaluate the function of the autonomic nervous system.We built a portable skin resistance detection system based on WiFi,which can not only increase the sampling frequency of data but also realize the wireless transmission of data.This system brings great convenience to the detection of the autonomic nervous system.We designed the system circuits,such as the power circuit,the signal amplification circuit,etc.,and completes the selection of key components of the system,such as the main control module,the WiFi module,and the amplification chip.The system also designed data collection and real-time drawing software.Users can monitor the changes of their skin resistance at any time,and save the data in time for subsequent analysis.In order to evaluate the autonomic nervous system more intuitively,we first filtered out the high-frequency interference in the original skin resistance signal and then used the wavelet decomposition and reconstruction method to separate the high-frequency and low-frequency components of the skin.The skin resistance signal is evaluated separately.We analyzed the variability of skin resistance from multiple dimensions of time domain,frequency domain,and time-frequency domain to obtain more reliable and valuable information,and provided intuitive assessment indicators for patients and doctors.We designed two sets of experiments based on the system:the closed-eye one-legged stand-up experiment and the in-situ high-leg-lifted run experiment,which monitored the skin resistance change trend during exercise and compared the skin resistance value of different subjects with the one-legged standing time The relationship between time and frequency characteristics of skin resistance variability under different physical conditions is analyzed.On the one hand,the feasibility of the system was verified,on the other hand,the relationship between skin resistance and sympathetic nervous system excitement was explored.According to the results of the experiments,we come to the following conclusion.The increase of sympathetic nervous system excitability will lead to the decrease of skin resistance and variability,simplify the spectrum components of skin resistance.Increased intensity of exercise will increase the excitability of the sympathetic nervous system.At last,long term closed-eye one-legged stand-up training can adjust the stability of the autonomic nervous system.