成都理工大学 硕士学位论文 直流激发极化接收机研制 姓名：谢兴红 申请学位级别：硕士 专业：固体地球物理 指导教师：王绪本;郭勇 20100601 摘 要 i 直流激发极化接收机研制直流激发极化接收机研制 作者简介：谢兴红，男，1981 年 1 月，师从成都理工大学王绪本教授、郭 勇教授，2010 年 6 月毕业于成都理工大学固体地球物理专业、获得理学硕士学 位。 摘摘 要要 电法勘测是根据地壳中各类岩石或矿体的电磁学性质（如导电性、导磁性、 介电性）和电化学特性的差异，通过对人工或天然电场、电磁场或电化学场的空 间分布规律和时间特性的观测和研究， 寻找不同类型有用矿床和查明地质构造及 解决地质问题的地球物理勘探方法。主要用于寻找金属、非金属矿床、勘查地下 水资源和能源、解决某些工程地质及深部地质问题。激发极化法是以不同岩石、 矿石激电效应的差异为物质基础， 通过研究观察大地激电效应来探查地下地质情 况的一种分支电法，在勘测中发挥着重要作用。激发极化法的应用范围已日益广 泛，除寻找铜矿床外，在找铁(山西式铁矿、沉积型锰铁矿，镜铁矽)、找煤(小 而浅的煤矿，煤矿外围的隐伏、半隐伏煤田)、找铅锌矿，在超基性岩区找镍铬 矿和找金矿等都取得了定的地质效果。在国外， 激发极化法在矿产普查勘探中 发挥了重要作用，找到了一些大型低品位的硫化矿体(其他物探方法是难以奏效 的)。在激发极化勘探中，大功率发射机和高灵敏度接收机，后端数据处理单元 构成激发极化的基本单元。 本论文主要的研究对象是高灵敏接收装置使得接受装 置向轻便、自动，记忆、多参数测量方向发展。 基于以上背景，论文通过研究、分析国内外激电法技术和激电法仪器的发展 及现状，提出了直流激发极化接收机研制这一课题。本课题的主要目标是以德州 仪器（TI）公司的基于 Cortex-M3 核的 ARM LM3S9B92 作为主控器件、采用 SD （Secure Digital）卡作为数据存储单元，可以按照文件方式长时间存储数据方 便管理；USB 作为数据传输单元，比传统的 RS232 通信更方便；抗干扰方面主要 采用 50HZ 陷波器、开关电容滤波器、数字滤波技术等相结合的方式，提高系统 抗干扰能力；数据采集采用 24 位高精度 AD 转换器，提高测量精度；信号条理单 元采用可编程放大器单元、自然电位补偿单元、边沿检测单元，这对增加测试范 围和设备对测量环境最大限度的适应提供了可靠保证。 通过测量发射机激发地质 导体所产生的电压信号计算出视极化率，为数据处理单元提供所需的数据。 本论文主要完成的工作有：第一、根据激发极化法的基本原理和特性，对接 收机系统进行设计。完成系统原理图、PCB 设计和焊接调试工作；第二、完成对 成都理工大学硕士学位论文 ii 各模块的调试工作和基本驱动程序编写；第三、完成极化率计算方法研究以及软 件编写。最后完成设备整体调试，达到预期设计目的。 关键词：关键词：电法勘探 激发极化法 视极化率 数字滤波 LM3S9B92 Summary iii Development of DC-induced polarization receiver Introduction the author: Xie Xinghong, male, January 1981, where he studied under Professor Wang Xuben and Professor Guo Yong Chengdu University of Technology,in June 2010 graduated from the Chengdu University of solid geophysics, received a Master of Science Abstract Electrical survey is based on various types of crustal rocks or ore bodies in the electromagnetic properties of (such as conductivity, permeability, dielectric) and electrochemical properties of the difference, by artificial or natural electric field, electromagnetic field or electrochemical field in space distribution and time characteristics of the observation and research to find different types of deposits and the identification of a useful geological and geophysical exploration to solve geological problems approach. Used to find metals, non-metallic deposits, exploration of groundwater resources and energy to solve some of the engineering geology and deep geological problems. Polarization method is different rocks, minerals IP effect of the difference of material, by means of observation of the earth to probe IP effect a branch of geology underground electrical, in playing an important role in the investigation. The application of induced polarization method has become increasingly widespread, in addition to looking for copper deposits outside, looking for iron (Shanxi-style iron ore, manganese ore deposit types, iron silicon mirror), looking for coal (coal mines small and shallow, buried coal mine outside , semi-concealed coal field), looking for lead-zinc in ultrabasic rocks to find nickel-chromium ore and gold are all looking to achieve - the set of geological effects. Overseas, the induced polarization survey in the mineral exploration and play an important role, and found some large low-grade sulfide ore body (other geophysical methods is difficult to work in). Exploration in the polarization, high power transmitters and high-sensitivity receiver, back-end data processing unit constitutes the basic unit of polarization. The study of this thesis is highly sensitive receiver made it possible for devices to portable, automatic, memory, multi-parameter measurement direction. Based on the above background, the paper, through research, analysis of domestic and international IP law and IP law instrument technology development and present situation of the development of DC polarization receiver this topic. The main objective of this subject is Texas Instruments (TI)s Cortex-M3 core-based ARM LM3S9B92 as a 成都理工大学硕士学位论文 iv master device, using SD (Secure Digital) card as a data storage unit that can store data in accordance with the papers a long time to facilitate management; USB as a data transmission unit, than the traditional RS232 communication easier; anti-disturbance mainly 50HZ notch filter, switched capacitor filters, digital filter technology combination to improve anti-jamming capability; data collection using 24-bit high accuracy AD converter, to improve the measurement accuracy; signal conditioning unit with a programmable amplifier unit, the natural potential compensation unit, edge detection unit, which increase the range and test equipment to meet the maximum measurement environment provides a reliable guarantee. Geological conductors by measuring the transmitter excitation signal generated by the voltage calculated as the polarizabilities for the data processing unit to provide the necessary data. In this thesis, the completion of the work: First, according to the basic principles of induced polarization method and the ch