通过快速傅里叶变换提取特征参数,建立气体传感器动态响应的雷达图,并在此基础上研究了6种周期、4种温度幅值的正弦波、三角波、锯齿波以及矩形波等共96种温度调制模式下的微热板式气体传感器对3种易燃易爆气体的响应,分析温度幅值、周期和波形对3种气体的辨识情况影响,确立了一种基于FFT雷达图的温度调制模式优化选择的方法.%The features were extracted through fast Fourier transform and the FFT radar plots of gas sensor dynamic responses were built. Founded by the FFT radar plots, the dynamic responses of microhotplate gas sensors to three kinds of flammable and ex-plosive gases were studied modulated by total 96 modes including sine wave, triangular wave, sawtooth wave and rectangular waves, each with 6 periods ,4 temperature amplitudes. The effects of temperature amplitudes, period and wave types on discrimination re-sults were analyzed and a FFT radar plot based temperature modulation mode selection approach was proposed.
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