【作者】 廖明瑞；

【导师】 滕国库；

【作者基本信息】 大连海事大学 ， 计算机应用技术， 2008， 硕士

【摘要】 当前许多数据检测系统遇到了检测范围大,各数据采集点的分布分散以及不易布线的难题。本论文结合这些特点通过了几种常见的传输方式的比较,提出了一个方便、经济的无线解决方案。当前GSM/GPRS网络技术已经非常成熟,拥有范围广、成本少、费用低、效率高等特点,采用GSM/GPRS无线传输数据,使用移动运营商提供的服务成为了一种方便廉价的选择,同时也避免了复杂的布线以及对这些线路的维护。在无线传输过程中,论文采用了Q2406B无线通信模块,该模块支持TCP/IP、UDP、PPP等协议,方便实用。同时嵌入式产品的成本也越来越低,采用嵌入式技术的数据检测中心相对于PC机拥有更加低廉的成本和便于移动的优势。本文设计的基于嵌入式系统平台的无线数据检测系统采用ARM开发平台对各个数据点进行检测,该平台体积小,功耗低,功能强大,具有串口、VGA接口、LCD接口以及一个扩展槽,频率可达到200MHz。本系统在该平台上采用稳定,高效,易定制的linux操作系统。本文首先对几种数据传输方式进行了比较和选择,对系统进行了硬件设计并简要的介绍了硬件平台,之后研究了无线传输过程中使用到的AT指令集,以及讨论了在无线传输过程中需要的相关技术,并制订了数据传输过程中数据包的格式规范和数据传输协议,包括将数据采集终端和数据检测中心归入系统时的流程以及IP地址丢失时等情况下的流程。本文设计了软件的模块和部分流程,主要包括数据存储格式的规定和通信部分的软件流程。更多还原

【Abstract】 Now many data detecting system has the problem: the wide detecting range, the distribution of data point and the difficult arrangement of wire. The thesis gives a convenient and economical scheme through comparing several familiar transmission modes.The technology of GSM/GPRS network is very mature, which has the characteristics: wide range, little cost and high efficiency. Choosing wireless transmission through GSM/GPRS with using the services offered by mobile operator is the convenient and low-cost choice, it avoids complicated arrangement of wire and the maintenance of these wires. In the process of wireless transmission, the thesis adopts Q2406B wireless communication module, which supports TCP/IP、UDP、PPP etc, these protocols are convenient and practical.At the same time, the cost of embedded product is lower, the data detecting center with embedded technology has the advantages of little cost and easy moving comparing with PC. The wireless data detecting system based on the embedded system platform adopts ARM development platform to detect the data points. the ARM platform which has the serial port, VGA interface, LCD interface and a expansion slot is small and powerful. It also has the low power consumption and frequency of 200 MHZ. The system adopts the linux operation system which is stable, efficient, easy custom-made.The thesis makes a choice through comparing the several data transmission modes first. It designs the hardware of system and introduces the hardware platform briefly. Secondly, the thesis studies the AT commands and discusses the technology needed in the wireless transmission. Then it makes data transmission protocols and the flows of the data collecting terminal and data detecting center joining into the system and the solution of IP losing. Finally, the thesis designs the software module, which mainly includes the definition of the data memory form and the flow of communication module.更多还原