在线式VOC检测仪的研制

发布时间：2018-04-05 10:29

本文选题：VOC　切入点：检测仪　出处：《哈尔滨工业大学》2016年硕士论文

【摘要】：改革开放将近四十年来,我国的国民生活水平日益提高,越来越多的楼房如同是雨后春笋一般拔地而起,而伴随着这些建筑物的大量出现,一大批相关产业也进入了一个“产业春天”,像是建筑材料,装修装饰等等。而目前市面上大部分的这些行业,他们使用的材料里都含有或多或少的有机化合物。这些有机化合物在空气中长时间的存留,给人们生活带来了很多健康的威胁,甚至是危及生命。在这种情况之下,如何能够对这种有机化合物,VOC气体进行高效率、高准确率的检测,成为了业界内频繁提起和关注的话题之一。针对上述现象,本文所设计的系统目的是实现对于VOC气体的检测。采用从上世纪末开始逐渐兴起的一种新兴技术——PID光离子化技术为核心技术。同时可以实现在线式的连续不断的检测,数据实时更新,DS1302电子时钟,TFTLCD液晶显示,声光双重报警和SD卡数据存储功能。PID传感器选用的是英国阿尔法公司生产的PID-A1传感器,该传感器具有精度高,低浓度检测灵敏度高,检测范围广,响应速度快,寿命长等特点。基本可以分辨出ppb量级的浓度信息,检测范围可以从0一直到6000ppm,响应时间可以达到20ms以内,该传感器内部的紫外灯的平均寿命基本都可以达到5000小时。本文以PID传感器和STM32大容量处理芯片为核心构架,提出了整体系统的概况和组成,设计了相应的信号处理、电子时钟、声光报警等硬件功能模块,完成硬件电路设计工作的同时,编写了相应的软件处理程序,介绍了数字滤波的算法知识。并通过实验进行了相关的数据验证,并结合实际的测试结果,对整个系统的设计进行了总结以及对未来提出了一些展望和想法。
[Abstract]:In the past 40 years of reform and opening up, the standard of living of the people in our country has been improving day by day. More and more buildings are springing up like bamboo shoots, and accompanied by the emergence of a large number of these buildings.A large number of related industries have also entered a "industrial spring", such as building materials, decoration and so on.And most of these industries today, they use materials that contain more or less organic compounds.The existence of these organic compounds in the air for a long time has brought many health threats, even life-threatening, to people's lives.In this case, how to detect the organic compound VOC gas efficiently and accurately has become one of the frequently raised and concerned topics in the industry.In view of the above phenomenon, the system designed in this paper is to realize the detection of VOC gas.A new technology, pid photoionization technology, which has been rising since the end of last century, is used as the core technology.At the same time, the on-line continuous detection can be realized. The electronic clock of DS1302 can be updated in real time. TFT LCD LCD display, acousto-optic dual alarm and SD card data storage function. Pid sensor is the PID-A1 sensor produced by Alpha Company of England.The sensor has the advantages of high precision, high sensitivity, wide detection range, fast response speed and long life.The concentration information of ppb can be distinguished basically, the detection range can be from 0 to 6 000 ppm, the response time can reach within 20ms, and the average life of the UV lamp inside the sensor can reach 5000 hours.At the same time, the corresponding software processing program is written, and the arithmetic knowledge of digital filter is introduced.Based on the experimental results, this paper summarizes the design of the whole system and puts forward some prospects and ideas for the future.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH83

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