应用于消防的可燃气体探测器检验系统的研究

发布时间：2018-02-06 00:23

本文关键词： 可燃气体探测器可拆分式结构动态配气模糊PID控制器可视化编程　出处：《河北科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：可燃气体探测器是一种应用于易燃易爆区域对单一或者多种可燃气体进行探测报警的安全仪器。当环境中有可燃有毒气体泄露,其浓度达到爆炸上、下限的临界点时,可燃气体探测器就会报警,提醒工作人员采取安全措施,防止火灾爆炸事故的发生。因而可燃气体探测器质量的好坏,能否准确的探测出可燃气体的浓度显得尤其重要,这就迫使我们需要研究出一套尽可能的模拟现场真实环境对其进行检定的系统。本课题首先介绍了各类可燃气体探测器的使用现状及发展趋势,随着工业化进程的逐步加深,人们对火灾探测报警技术的重视不断提高,对消防意义的认识也不断加深。通过对国家标准GB15322进行深度剖析,合理的设计出了由螺栓连接的可拆分式箱体结构,方便运输安装。并且在钢板之间填充聚四氟乙烯,保证了箱体的气密性、隔热性,能够针对不同试验条件下可燃探测器的响应阈值进行检验。在静态气体配比法和动态气体配比法的基础上,采用了“动态配气,实时监测”的新型方法。本装置采用工控机对整个检验过程进行控制,大大提高了自动化及抗干扰能力。系统采用模糊PID控制器来控制温、湿度等环境试验,减小超调量。搭建了SIMULINK模型进行仿真,验证了其正确性。采用离线查询的方式载入PLC进行工业控制,使系统的温、湿度控制指标达到国家标准。采用Visual Basic可视化编程语言进行软件开发,具备简洁实用的界面、能够自动记录和打印,较好完成国家标准规定的各项试验。最后,本文给出了系统对可燃气体探测器的几项报警测试结果,表明了本系统各项方案的设计达到了预期目的。
[Abstract]:The combustible gas detector is a kind of safety instrument which is used to detect and alarm a single or multiple combustible gases in flammable and explosive areas. When there is a leakage of flammable toxic gas in the environment, its concentration reaches to explosion. At the critical point of the lower limit, the combustible gas detector will alarm, remind the staff to take safety measures to prevent the fire and explosion accident, so the quality of the combustible gas detector is good or bad. It is very important to detect the concentration of combustible gas accurately. This forces us to study a system that can simulate the real environment as much as possible. Firstly, this paper introduces the current situation and development trend of various kinds of combustible gas detectors. With the gradual deepening of industrialization, people pay more attention to the fire detection and alarm technology, and the understanding of the significance of fire protection is also deepening. Through the in-depth analysis of the national standard GB15322. The detachable box structure connected by bolts is designed reasonably, which is convenient for transportation and installation, and the PTFE is filled between the steel plates to ensure the air tightness and heat insulation of the box. It can test the response threshold of combustible detector under different test conditions. On the basis of static gas proportion method and dynamic gas proportion method, the dynamic gas distribution method is adopted. A new method of real-time monitoring. The system uses industrial control computer to control the whole inspection process, which greatly improves the automation and anti-interference ability. The system adopts fuzzy PID controller to control the temperature. Humidity and other environmental tests to reduce the overshoot. SIMULINK model simulation, verify its correctness, using off-line query loading PLC for industrial control, so that the system temperature. The humidity control index reaches the national standard. The Visual Basic visual programming language is used to develop the software. It has a simple and practical interface and can record and print automatically. Finally, several alarm test results of the system for combustible gas detectors are given, which show that the design of the system has achieved the desired purpose.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU892

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