分布式无线数据采集实现-物理电子学专业论文.docxVIP

I IV Abstract and the test for wireless communication is done. The total time for wireless communication test is about 2000 minutes, and the wireless communication error rate is less than reliable. 9.5?10一10 . This is shown that the wireless communication is stable and Based on the initial completion of the prototype of distributed wireless data acquisition system, a method used for clock synchronization between distributed wireless data acquisition units is realized. Through wireless communication the timers of CPU record the time of sending and receiving data packets between the stations to achieve clock synchronization. Through wireless communication the DAC of CPU adjusts the voltage of VCXO to improve the accuracy of clock synchronization further. In the two cases that the clock of the master and slave is synchronized or not, the distributed data acquisition, analysis and comparison are done. In this test of clock synchronization, the accuracy of clock synchronization of signal in master and salve station when clock is synchronized is 0.061 ms, which is better than 1.27ms when clock is not synchronized. The results show that the clock synchronization is very important for improving the synchronization of distributed data acquisition. In summary, the prototype of distributed wireless data acquisition system for oil seismic exploration is initially realized in this paper. And all of these have done a certain amount of preparation work for adding a distributed wireless data acquisition network to large full digital seismograph system development project of the laboratory. Key Words：seismic exploration, wireless, distributed data acquisition 中国科学技术大学学位论文原创性声明 本人声明所呈交的学位论文,是本人在导师指导下进行研究工作所取得的成 果。除已特别加以标注和致谢的地方外，论文中不包含任何他人已经发表或撰写 过的研究成果。与我一同工作的同志对本研究所做的贡献均已在论文中作了明确 的说明。 作者签名： 签字日期： 中国科学技术大学学位论文授权使用声明 作为申请学位的条件之一，学位论文著作权拥有者授权中国科学技术大学拥 有学位论文的部分使用权，即：学校有权按有关规定向国家有关部门或机构送交 论文的复印件和电子版，允许论文被查阅和借阅，可以将学位论文编入《中国学 位论文全文数据库》等有关数据库进行检索，可以采用影印、缩印或扫描等复制 手段保存、汇编学位