433MHz频段燃气表无线远程抄表系统的研究

发布时间：2018-03-11 17:48

本文选题：无线远程抄表系统　切入点：无线数传模块　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来,国民经济飞速增长,科学技术特别是电子技术迅速进步,这些客观因素催生出各种新型的抄表系统。相对于传统的抄表系统,新型的抄表系统更加节省时间、节约人力、而且效率又高,是现代智能化住宅的首选抄表方式。本文结合实际应用对其中一种新型的抄表系统——无线远程抄表系统的关键技术进行了研究。本文的主要研究内容如下:首先,介绍了各种自动抄表系统的开发过程以及发展状况,并介绍了燃气表无线远程抄表系统。针对不同的抄表环境,给出了两种不同结构形式的燃气表无线远程抄表系统方案——基于无线双向燃气表方案和基于无线采集器方案。并且,在单片机芯片STC89C52和无线数传芯片CC1101的基础上,设计了一款用于燃气表与手持机、燃气表与无线采集器、无线采集器与手持机之间相互通讯的无线数传模块,该模块能够满足本文所设计的抄表系统中各个数据终端之间通讯的需求。其次,本文介绍了天线、电小天线以及天线阻抗匹配方面的基础知识。在此基础上,设计出了两款能用于燃气表无线远程抄表系统的天线,分别是倒F螺旋天线和门型电小天线。这两款天线都具有小型化的特点,能够安装在燃气表表壳中比较狭小的空间内。同时,这两款天线都通过短路点连接到地,可以有效防止在天线辐射器上面产生静电,而静电对燃气表来说是一个很大的安全隐患。仿真与实测数据表明这两款天线能够满足燃气表无线远程抄表系统无线通讯的要求。本文提出的无线远程抄表系统具有容易通信组网、频点免申请以及资金需求量少等优点,能够在很大程度上满足人们对新型抄表系统的需求。
[Abstract]:In recent years, with the rapid growth of the national economy and the rapid progress of science and technology, especially electronic technology, these objective factors have given birth to various new meter reading systems. Compared with the traditional meter reading systems, the new type of meter reading systems save more time. Save manpower and be efficient, This paper studies the key technology of a new type of meter reading system-wireless remote meter reading system. The main contents of this paper are as follows: first, This paper introduces the development process and development status of various automatic meter reading systems, and introduces the gas meter wireless remote meter reading system. This paper presents two schemes of wireless remote meter reading system based on wireless bidirectional gas meter and wireless collector, which are based on single chip computer chip STC89C52 and wireless data transmission chip CC1101. A wireless data transmission module is designed for the communication between gas meter and handset, gas meter and wireless collector, wireless collector and handset. This module can meet the requirements of communication between different data terminals in the meter reading system designed in this paper. Secondly, this paper introduces the basic knowledge of antenna, small antenna and antenna impedance matching. Two antennas which can be used in gas meter wireless remote meter reading system are designed. They are inverted F helical antenna and gate type small antenna, both of which have the characteristics of miniaturization. Can be installed in a relatively small space in the gas meter case. At the same time, the two antennas are connected to the ground through short circuit points, which can effectively prevent static electricity generated on the antenna radiator. Static electricity is a great security hazard for gas meter. Simulation and measured data show that these two antennas can meet the requirements of wireless communication of gas meter wireless remote meter reading system. The wireless remote meter reading system proposed in this paper. Easy communication networking, The advantages of frequency exemption and less capital demand can meet the demand of the new meter reading system to a great extent.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU996

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