MSP430F149论文：基于MSP430单片机的粮库温度无线监控终端的设计与实现.doc

MSP430F149论文：基于MSP430单片机的粮库温度无线监控终端的设计与实现【中文摘要】粮食的安全存储是关系到国计民生的战略大事,国家每年都为此投入大量的人力和物力。由于粮库通常占地面积一般都较大,且位置相对分散,仓内测试点较多,所以采用人工检测工作量极大,效率低下,并且监测时容易漏检,检测周期较长。随着科学技术的发展特别是现代电子技术的进步,近些年来有关储粮管理方面的智能化仪表大量涌现。但是这些传统的监测仪表通常采用RS-485等有线的数据通信方式同监控中心进行数据交换。需要繁杂的布线过程、扩展困难、而且通常是一个节点出现问题会影响整个系统,不利于粮仓的监控与管理。本文给出了一种基于当代移动通信技术的无线监控终端的设计方案。该项整个系统包括数据中心的数据库管理系统和各监测点的监控终端两个部分。本论文主要讨论监测终端的开发过程。监控终端主要由电源模块、数据采集模块、无线通信模块、显示模块及主控制模块五个部分组成。主控制模块主要由高性能、超低功耗的16位MCU-MSP430F149完成,具有较高的性价比和很强的处理能力；数据采集模块采用单总线结构的DS18B20,节约MCU的I0资源,检测点可扩充性很强。并且DS18B20内部集成了AD,可直接向MCU提供AD转换后的数据(数字信号),从而大大提高了传感器传输的距离和抗干扰能力。无线通信系统采用化为的一款两频段GSM/GPRS无线模块收发数据,具有高达115kbit/s的传输速率(最高值为171.2kbit/s,不包括FEC)。用户只需开通”手机上网”业务,数据按流量收费,通信成本十分低廉,而且不受距离限制。现场的数据进过传感器阵列采集之后交由MSP430F149进行处理,处理后的数据由各监测点的显示系统实时的显示出来。并定时联网同数据中心进行交互,对所采集的数据进行集中上传。系统还设置有温度的上下限控制,当温度超限时自动发出报警提示。本无线监控终端经现场实地测试,运行良好。并具有通信可靠、投资少利于扩展等优点；检测精度较高,能很好的满足了产品设计的要求；并且具有很好的适应性,稍加改造也可应用于其他无线监控的场合。【英文摘要】The safety of food storage is a strategic priority which related to the peoples livelihood, that cost the states a lot of manpower and material resources every year. With result of the grain depots generally covers an large area, and the relative position between depots is scattered, so that there are a great amount of work by manual inspection, that is inefficient, and easily missed when monitoring, inspecting by manual require a long cycle. As science and technology development, especially the progress of modern electronic technology in recent years, there are a large numbers of intelligent instruments on the management of grain storage. But these traditional monitoring instruments commonly used RS-485 and other wired data communication method for data exchange with the monitoring center. Which require complicated wiring process, difficulties to expand and problems in a node will affect the entire system, this will not conducive to the granary of the monitoring and management. This paper presents a wireless surveillance terminal design based on modern mobile communication technology.The project including two parts, one of them is morning data center database management system and the other is monitoring points to monitor the terminal. This paper focuses on the development process of monitoring the terminal.Monitoring terminal is constitute of five parts,which is the power module, data acquisition module, wireless communication module, display module and main control module. The main control module include a high-performance, ultra low power 16-bit MCU-MSP430F149, which has strong processing capabilities in low price; Data acquisition module using a single bus architecture DS 18B20, Using few MCUs 10 resources, and easily to expand. DS18B20 internal integration AD circuit, and is able to directly provide the digital to MCU, thus greatly improving the sensor transmission distance and noise immunity. The wireless communication module uses a two-band GSM/GPRS wireless modules send and receive data, which has up to 115kbit/s transfer rate (maximum value 171.2kbit/s, dont including FEC). with the “mobile Internet” service, user could communicate with inspecting center. Communication costs are low, and without distance limitations. The field data processed by the MSP430F149 after collection with sensor array, and shown by display module in the monitoring points. And regularly interact with data centers. The system set upper and lower limits of temperature control, when the temperature gauge automatically send alarm.The wireless surveillance terminal has been to checked and accepted, and running well, and have reliable communication, the advantages of low investment and easile to expand; The system has high precision, and could meet the design requirements well; The system has good adaptability, with a little transformation can also be applied to other wireless monitoring and control applications.【关键词】MSP430F149 粮库 DS18B20 无线监控终端 GPRS GTM900-C【英文关键词】MSP430F149 Grain depot DS18B20 wireless surveillance terminal GPRS GTM900-C【目录】基于MSP430单片机的粮库温度无线监控终端的设计与实现摘要4-5Abstract5-6目录7-8图和附表清单8-101 引言10-121.1 现场现状与课题研究的意义101.2 本课题研究的主要内容10-122 总体设计12-152.1 系统设计的基本思想12-132.2 系统总体架构13-153 硬件设计15-393.1 电源部分设计15-173.2 单片机选型介绍17-203.3 温度传感器20-263.3.1 DS18B20的电路接法22-243.3.2 DS18B20的时序24-263.4 无线模块应用26-343.5 数码管显示电路的设计34-373.5.1 LED数码管简介343.5.2 LED的工作原理34-353.5.3 LED显示方式35-373.6 电磁兼容性设计37-394 软件设计39-554.1 I