基于电话的远程湿度控制系统及其非线性修正

Study on long-distance humidity control system based on telephone and non-linear correction

介绍了一种基于电信网络和MODEM技术的远程湿度控制系统,阐述了该系统的功能,并给出了系统的硬件组成和软件设计.分析了湿度传感器的特性,表明测量范围较宽时,传感器的输出易受环境的影响,并且成非线性的关系.提出一种神经网络共轭梯度算法对湿度传感器非线性特性进行修正的方法,结果表明,修正后的湿度传感器能在较宽的测量范围内输出高线性度的信号.

This paper puts forward a long-distance humidity control system based on public telephone and modem technology.The function of the system are described and the hardware composition and software design of the system are given. The characteristics of humidity sensor was analyzed and found that the sensor output is linear and easy to be effected by ambient over a wide measuring range. A non-linear correction method for humidity sensor non-linearity based on the conjugate gradient algorithm for neural network is presented . The results showed that the humidity sensor with a proper neural network correction can provide a high linear over a wide range.