深孔分层抽水自动监测仪器的设计与应用

摘要

Aiming at the difficulties in independently obtaining hydrogeological parameters? that belongs to each aquifer of a deep drilling footage and the poor experimental environment, a new method of deep hole stratified pumping test is presented. The temperature and pressure sensors based on piezoresistive silicon core are designed, and the automatic control unit is configured;these are complementary used with aquifer packer, to solve the problem of independent study of the aquifer in deep hole. Considering the demands for high accuracy, high frequency sampling capability, and high efficient data processing, the intelligent compensation algorithm is developed; and the high speed sampling circuit and host computer data processing interface are designed to improve the overall performance of the instrument. In addition, in order to grasp the test status in real time and realize real time storage of the test data, the data display module based on LCD1602 and the data storage module based on SD card are designed . The automatic monitoring instrument is successfully applied in the investigation of Heihe basin;the test data of multiple aquifers in middle and lower region of Heihe are acquired. The test results prove the necessity, high efficiency, and reliability of the instrument. Such kind of instrument and method are helpful to improve the quality of hydrogeological survey in China, and theoretical innovation in hydrogeological field.%针对深进尺钻孔各个含水层水文地质参数难以独立获取、试验环境恶劣等问题,提出深孔分层抽水试验的新方法.设计了基于压阻硅芯体的温度、压力传感器并配置自动控制单元,与含水层封隔器配套使用,解决了深孔含水层独立研究的难题.考虑到自动监测仪器高精度指标、高频采样能力及高效数据处理的需求,开发了智能补偿算法,设计了高速采样电路及上位机数据处理界面,完善了仪器的整体性能.同时,设计了基于LCD1602显示屏的数据实时显示模块及基于SD卡的数据储存模块,使得监测设备能够实时掌握试验动态,并且实现了试验数据的实时存储.分层抽水自动监测仪器成功运用于黑河流域水文地质调查工作中,获取了黑河中下游地区多个含水层的抽水试验数据.应用结果表明了仪器的高效性和可靠性.此类仪器及方法有助于提高我国水文地质调查质量,以及水文地质领域的理论创新.