以半导体气敏元件的内阻-浓度特性的经验关系为基础,通过选择电压采样电路和元件的参数,导出了一种能覆盖气敏元件可用区域的电压信号-浓度曲线的分段经验式拟合模型和相应的插值算法.这种方法分段少,对不同的元件个体具有普适性,适合于气敏方式的实时检测.文中并对测量中的相关问题进行了讨论. Based on the empirical relationship of internal resistance and concentration characteristics of semiconductor gas sensor, by choosing the parameters of voltage sampling circuit and components, a piecewise empirical formula of voltage-concentration curve covering the available area of ​​gas sensor is derived The model and the corresponding interpolation algorithm.This method has few sections and is universal for different component individuals and is suitable for the real-time detection of gas-sensing methods.In the paper, the related problems in the measurement are discussed.