温度干扰下电离式碳纳米管传感器阵列检测两组分混合气体敏感特性的研究

IAccurate detection of fault characteristics mixed gases in transformer insulating oil can reduce transformer accidents. Hydrogen (H2) and acetylene (C2H2) are the main characteristic gases of the transformer failures, but the performance of traditional sensors commonly used for the detection of H2/C2H2 is greatly affected by the temperature disturbance, and the existing temperature compensation methods have the disadvantage of increasing the system volume and increasing the cost and cannot meet the application requirements. Here we reported an array with three triple-electrode carbon nanotubes sensors. The three sensors in the array have different electrode separations. H2 and C2H2 are detected by two sensors in the array, and the other sensor detects the temperature. The experimental results show that collecting currents of sensors decreases with the increasing gas concentration and increases with the temperature. The three sensors with different separations have different sensitivity characteristics under different gas concentrations and temperatures. Therefore, the sensor array has potential for the direct detection of the H2/C2H2 mixture without separating the mixed gases and has an ability to resist temperature interference.