特种车辆温控系统的温湿度测量网络设计

Design of Temperature-humidity Measuring Network for Temperature Control System of Certain Special Vehicle

某型特种车温控系统温湿度测量方式采用多个4~20mA电流型温湿度传感器,中央控制单元根据传感器数量设计多路专用测量电路完成信号的采集,该测量方式带来了系统成本高、通用性不强、扩展性差、维修性差及知识产权自主性不足等一系列问题,不利于武器装备的技术发展及实战化效能提升;针对上述问题,设计了一种基于XC164CS单片机和单总线技术相结合的温湿度测量网络,通过单路检测电路完成多个温湿度测点信号的同步测量,且温度和湿度精度分别满足±0.5℃和±3.5%RH的系统指标要求;实践表明:该方案在成本、可靠性、准确性、通用性及扩展性等各方面都较传统测量方案有较大的优势,且总体架构简单,极大地简化了特种车温控系统的总体设计,具有很重要的现实意义。

In temperature control system of certain special vehicle,many temperature-humidity transducers of 4~20 mA are adopted and special measurement circuits are designed for those transducers to complete signal acquisition in central processing unit.It brings such problems as high cost,low universality,low expansibility,low maintenance and low independent intellectual property rights.It is adverse to technique development of weapon equipment and efficiency progressing of warfare.So a temperature-humidity measuring network based on XC164 CS and 1-wire bus technology is designed and multi-channel temperature-humidity signals are measured isochronously by single detecting circuit.Besides,the performance meets system requirement that temperature error is less than ±0.5℃and humidity error is less than±3.5% RH.The practice indicates that this scheme is more advantageous than the traditional in many aspects,such as cost,reliability,measurement precision,universality and expansibility.Also the overall framework is more simple and the design of temperature control system of certain special vehicle is designed easily greatly,so it has significant senses in application.