恒温恒湿培养箱中温湿度自动控制器的总体方案设计

摘要

随着现代科技的发展，恒温恒湿箱的应用越来越广，对它的要求也越来越高。本设计对恒温恒湿培养箱温湿度自动控制器进行了总体方案设计。采用温湿度集成测量器件，设计温湿度控制器的硬件电路。硬件设计可以由温湿度控制以及数据采集等两大部分组成。数据采集以及信号调理主要通过数据采集来实现，其具体的实现方式为数据采集以及信号调理电路来进行控制板；温湿度调节控制可以根据相关的驱动执行机构来实现[1]。以此同时，设计了基于 BP 神经网络的温湿度控制算法，并使用 Matlab 对其进行了仿真。%With the development of modern sciences and technologies,constant temperature and humidity incubator had been applied more and more widely.Higher and more requirements have also been applied on it.In this thesis,a temperature and humidity controller had been designed for a constant temperature and humidity incubator.The scheme of the controller was designed.Using integrated measurement device of temperature and humidity,the hardware of the controller was designed,which consisted of two main parts :data acquisition and control of temperature and humidity.In data acquisition,signal conditioning and data acquisition were implemented by using a signal conditioning circuit and a data acquisition controlling board.The controlling of temperature and humidity was achieved with a driving circuit.At the same time,a temperature and humidity control algorithm was designed based on a BP neural network.The simulation was conducted with Matlab.