Composite materials were formed by adding carbon nanotubes(CNT)to magnetorheological gel(MRG),com-bined with the excellent magnetic response characteristics of MRG and the conductivity characteristics of CNT,the composite ma-terial was used as a filling material to design experimental sensitive component.A characterization system was established to con-duct experimental research on the static and dynamic characteristics of the magneto-resistance effect of the composite material,and the mechanism of the magnetoresistance effect was analyzed at the micro level,the key factors of the effect of excitation mag-netic field on the resistance of composite materials were revealed.The results show that the resistance value of the sensitive ele-ment decreases with the increase of the magnetic field within the magnetic working area,and the relative change reached 62.2%.At the same time,it also exhibits good time stability.The dynamic response output of the experiment is highly consistent with the variation trend of the excitation magnetic field,and proving that the composite material also has good dynamic magnetoresistance response characteristics.
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