< p >我用几个气体传感器(MQ2、MQ3 MQ4, MQ5, MQ6, MQ7, MQ8, MQ9,和MQ135)来测量空气质量在我家里。这些传感器校准工作在特定浓度范围(即200 - 10000 ppm)。这里有一个例子模型从一个数据表:< a href = " https://i.stack.imgur.com/2tCP2.png " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/2tCP2.png " alt = " MQ2敏感性特征" / > < / > < / p > < p > Rs =电阻传感器的< / p > < p > Ro =电阻传感器的清洁空气< / p > < p > Arduino读取传感器的值。然后我将Rs / Ro值转换为PPM使用y = mx + b, y =日志(Rs / Ro)和x =日志(PPM)。 When concentrations are too low (<200ppm) or too high (>10000ppm), the Rs/Ro value falls outside the model. What should I do with the values that fall outside the model's range?