Preparation And Research Of Wearable Fabric Electrode Based On Biological Signal Collection

With the development of the society and the aging of the population increase,cardiovascular disease such as respiratory disorder,chronic diseases and so on have been grave threats to old people.A wearable fabric system for long-term biological signal monitoring and physiological statement feedback has been researched.In this paper,the research mainly contents the following respects: the produce and principle of biological signals,the preparation and process optimization of fabric electrode,the appearance design of fabric electrode,biological compatibility test,electrical performance analysis,SPSS correlation analysis,signal filtering and feature wave processing.The cell membrane has different ion permeability and different ion concentration inside and outside when people at different statement.The weak bio-signal collected by fabric electrode is the potential difference caused by different ion concentration.。Fabric electrode is a smart sensor produced by fabric structure material to collect biological signal with a harmless way and keep the original characteristics like comfort,affinity,and many other advantages.In this paper,many kinds of fabric electrode like woven fabric electrode,embroidery fabric electrode,knitting fabric electrode and other different magnetron sputtering fabric electrode have been prepared.Wavelet transform is signal wave after filtering that ECG Signal passes respectively high pass and low pass filter to get signal,then new ECG signal can be recombined after several divisions.Through SPSS analysis,this research found that the fabric electrode could explain 95.5% otherness of the original ECG signal.In a word,the new fabric electrode can be used to collect ECG signal accurately.Some artifact and power noise carried by the ECG signal collected by fabric electrode can be denoised by wavelet transform and the feature waves(R wave location and QRS wave group)can also be found by self-developed algorithm and extraction principles and accomplish the real-time monitoring.To optimize the usage of fabric electrode,this paper analyzed the influence of electrode shape and size,skin electrode impedance and so on to measure the impedance and bias voltage and further analyze the effects of size and shape on usage result of embroidery fabric electrode.Considering the unique performance of nano Ag,this paper studied the MTT test.L929 cells has been chosen to feedback the biocompatibility by the cell growth and morphology.After the biocompatibility test by analyzing the multiplication and the cell morphology in fabric electrode leaching solution.The results are as follows.Through biocompatibility test,the cell-proliferation rate of L929 cells reduced slowly and the cell maintain good in fabric electrode leaching solution.However,the increasing concentration of nano silver can cause the damage of cytoskeleton change and cell cycle arrest.The cytotoxicity of signal fabric electrode reaching grade 2 which is conformed to the standard of medical material testing.The appearance of nucleus and cytolemma keep health statement in the fabric electrode leaching solution and the cell shape keep fusiformis to cycle shape.In conclusion,the fabric electrode produced in this paper is no toxic which can meet the requirements of medical materials in vitro.