【作者】 于洋；

【导师】 张献州；

【作者基本信息】 西南交通大学 ， 大地测量学与测量工程， 2007， 硕士

【摘要】 目前，以PDA为代表的移动设备日益普及，将PDA应用于工程测量，实现测量内外业一体化、数据采集及处理的实时、自动化，将是工程测量的一个重要发展趋势。而实现PDA与测量仪器的通信是其中关键的一环，本文对此进行了一些深入的研究工作。本论文主要研究内容如下：1．阐述了PDA和嵌入式系统的应用与发展现状，对几种流行的嵌入式操作系统做了分析和比较，指出了各自的优势和应用领域。2．在分析全站仪的结构、功能和应用的基础上，结合数据通信的相关理论，深入研究了全站仪与PDA通信的关键技术与方法。研究了多种类型全站仪的数据结构与解析方法，并对全站仪与PDA的通信接口进行了设计与实现，同时介绍了PDA对全站仪进行在线控制和实时通信的技术和方法。3．阐述了全球定位系统的基本理论和GPS数据通信的协议和标准-NMEA0183。深入研究和分析了GPS与PDA数据通信关键技术，包括接口设计、信号接收与处理、坐标转换等。对GPS与PDA的通信接口进行设计与实现，并对传统GPS编程和应用GPSID开发进行了深入探讨和分析。基于PDA的移动勘测办公通信接口的研究对于提高测绘外业的工作效率、改进传统的工作模式具有重要的意义。本文所介绍的技术方案和实现方法为测绘相关的PDA应用开发打下了一定的基础。更多还原

【Abstract】 As mobile devices gain their ground daily, they are more and more found in surveying engineering presently. And one of the most significant development directions in this field is, to apply PDA to engineering survey and make the job-both data acquiring and processing-done at one time. Make the ambition come true, communication barriers have to be bridged between PDA and surveying instruments. And some in-depth researches are carried out right on the subject in the thesis.The main contents of the thesis are summarized as follows:I. A survey of the current status of PDA and embedded system, including their manufacturers, operating characteristics and applications, is made.II. A study on communications between total station and PDA is presented. The study is based on the structure, functions and applications of total station. Also included in the study are data structures and analytic methods of some familiar total stations. We also designed a communication interface between PDA and total stations. The design can be used to control total station’s work on PDA.III. Essential theories of communication standard NMEA-0183 of GPS are expatiated. Key technologies of data communications between GPS and PDA are researched, including interface design, data receiving and processing, coordinate transformation. We have designed and developed a communication interface between GPS and PDA, discussed and analyzed traditional GPS programming and the new GPSID method.The research of mobile surveying communication interface based on PDA plays a significant role in improving work efficiency of field survey and bettering its work mode. The technologies, schemes and developing methods discussed in this thesis can provide a foundation for future surveying-related PDA development and application.更多还原