小型数控式相对湿度控制装置研制  

An NC-type relative humidity control device for in-situ experiments

作　　者：曾建荣[1] 王首智[2] 曹玲玲[3] 李燕[1] 

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800 [2]清华大学工程物理系,北京100084 [3]成都工业学院电子工程学院,成都611730

出　　处：《核技术》2017年第1期12-17,共6页Nuclear Techniques

基　　金：国家自然科学基金(No.11305242)资助~~

摘　　要：相对湿度(Relative humidity,RH)是很多实验过程的关键环境参数之一,RH控制对同步辐射在线实验尤为重要。基于单片机的动态控制,研制了一套便于加载至同步辐射实验线站在线使用的小型数控式RH控制装置。该装置使用微型气泵抽取潮湿空气和干燥空气分别构建了加湿和除湿两个通道对控湿腔体内RH进行动态平衡。采用模糊控制算法通过单片机实时控制RH的变化。该装置能将RH控制在20%-94%,误差为±1.0%;能以固定速度控制RH稳定上升(20%-90%)或稳定下降(90%-20%),误差为±1.5%;能在湿度上升、稳定和下降三个工作模式之间快速切换,可满足同步辐射在线实验对湿度控制的多种需求。Background： Relative humidity （RH） is one of the key environmental parameters in many experimental processes, and RH control is particularly important for in-situ synchrotron radiation experiments. However, there is no suitable commercial RH control equipment available for such experiments. Purpose： Based on the dynamic control of microcontroller, this study aims to develop an integrated set of numerically controlled （NC） RH control device, which can be conveniently loaded on the synchrotron radiation end-stations. Methods： A moisture channel and another dry air channel are connected to the sample chamber for humidification and dehumidification respectively The dynamic equilibrium of RH at various values is controlled by the microcontroller using a fuzzy algorithm. Results： This device can hold the RH with an error of ~1.0% at any set value from 20% to 94%. It also can increase the RH from 20% to 90% and decrease the RH from 90% to 20% with an error of ~1.5% at a constant speed. Conclusion： This device can provide RH controlling environment with three switchable operation modes including RH holding, increasing and decreasing. It can meet various requirements of humidity control in kinds of synchrotron radiation in-situ experiments.

关 键 词：同步辐射 相对湿度 数控 

分 类 号：TL99[核科学技术—核技术及应用]