毕业设计（论文）-工程地震仪数据采集与传输系统的研制.doc

成都理工大学毕业设计（论文）I工程地震仪数据采集与传输系统的研制作 者 姓 名 专 业 :信 息 工 程 (电 子 方 向 ) 指 导 教 师 : 摘 要地震勘探仪器是集传感技术、电子技术、计算机技术、数据传输技术、通讯技术等为一体的综合系统工程地震勘探主要用于解决矿山、铁路、建筑等各种工程地质问题随着工程勘探的不断深入，勘探环境日益复杂，由此带来数据采集、数据传输等问题论文针对数据采集和传输环节相关技术进行研究，其主要内容包括：(1) 分析目前工程地震仪存在的问题和不足，提出研究方向和思路；(2) 数据采集部分采用24位Δ－ΣA/D转换器，设计了其外围接口电路；(3) 采用nRF无线收发集成芯片设计数据传输单元，实现工程地震数据的无线传输；(4) 完成了工程地震数据采集和数据传输的系统调试上述研究成果，对于便携式工程地震仪的研制打下坚实基础一些技术还可应用于其他信号采集和信号处理领域关键词：工程地震仪，数据采集，数据传输，便携式成都理工大学毕业设计（论文）IIDevelopment of the Data Acquisition & Transmission System of the Engineering SeismographAbstract：The seismic exploration instrument is a system including sensor technology, electronic technology, computer technology, data transmission, communication technology. The engineering seismic survey is mainly aimed to solve the engineering geological problem such as mine, railway and architecture. As the advance of engineering seismic survey, the circumstance of the exploration is more and more complex. The problem is that there is a great amount of data which needs to be acquired and transferred. The research is on the interrelated technology concerned with data acquisition and transmission. The main contents are as followings.(1) The problem and lack of the engineering seismic instrument at present are analyzed and research ways are put forward;(2) The signal sampling element adopts the 24bits Δ－Σ analog to digital converter and the peripheral interface circuit is designed;(3) The data transmission element adopts the nRF single chip transceiver and realizes the wireless transmission of the engineering seismic data;(4) The debugging of the engineering seismic data gathering and transfer system has completed.The above research achievements have established the basis of the portable engineering seismic instrument and some of the above research could be applied not only in engineering seismic exploration but also in related signal exploration and communication area. Keywords: Engineering seismic instrument，Signal acquisition, Signal transmission, Portable.成都理工大学毕业设计（论文）1目 录第 1章 引 言 .......................................................11.1 课题研究意义 .................................................11.2 国内外发展现状 ...............................................21.3 仪器功能特点 .................................................31.4 研究内容及方法 ...............................................41.4.1 目前工程地震仪存在的问题 ..................................41.4.2 本论文研究内容及方法 ......................................41.5 论文结构安排 .................................................4第 2章 系统方案设计 ................................................62.1 系统总体方案 .................................................62.2 地震检波器简介 ...............................................72.2.1 动圈式地震检波器 ..........................................72.2.2 压电式检波器 ..............................................72.2.3 涡流地震检波器 ............................................72.3 数据采集方案 .................................................82.4 数据传输方案 .................................................9第 3章 数据采集单元设计 ...........................................103.1 Δ-Σ 模数转换技术 .............................................103.1.1 过采样技术 ...............................................103.1.2 数字滤波及采样抽取技术 ...................................123.1.3 Δ－Σ 转换器结构特点概述 ..................................123.2 Δ－ΣA/D 转换器 ADS1271 简介 .................................143.2.1 ADS1271 特点与工作方式 ..................................143.2.2 ADS1271 数据输出模式 ....................................163.3 A/D 采集硬件电路设计 ........................................183.3.1 单元硬件方框图 ...........................................183.3.2 参考基准电压设计 .........................................19成都理工大学毕业设计（论文）23.3.3 输入信号调理电路设计 .....................................193.3.4 系统时钟设计 .............................................20第 4章 无线数据传输单元设计 .......................................214.1 传输方式比较 ................................................214.1.1 现有传输方式概述 .........................................214.1.2 无线数据传输的提出 .......................................224.2 nRF 系列芯片简介 ............................................224.2.1 nRF 芯片技术特点 .........................................224.2.2 基于 nRF 系列芯片的实验性能比较 ..........................234.2.3 nRF905 电路结构与工作原理 ................................234.3 无线数据传输硬件电路设计 ....................................25第 5章 软件设计实现 ...............................................265.1 软件开发环境－AVR Studio ....................................265.2 AVR Studio 开发流程 ..........................................265.3 ADS1271 数据采集软件设计 ....................................305.4 nRF905 无线传输软件设计 .....................................31第 6章 实际测试 ...................................................366.1 ADS1271 数据采集测试 ........................................366.2 nRF905 数据传输测 试 .........................................376.3 时钟同步测试 ................................................40结 论 ...........................................................41致 谢 ...................。