The Power Module Development Of NMR Instrument For Groundwater Investigation

NMR technology is advancing all over the world nowadays. Using NMR technology can explore underground water directly. It realized searching groundwater directly by means of geophysics method. With the instruments based on NMR method, we can investigate regional hydro-geology condition; ascertain the 3-D distribution of groundwater. Then provides dependable information to help us searching for groundwater used for industry and for living, it also provides information about the location of best place to dig a well. By analyzing the initial amplitude and relaxation time of the signal received by the NMR instrument, we can calculate the content of underground water, and know about the mean pore size. The paper designed the measure and control software for NMR prototype machineThe paper totally includes six chapters. The contents of the paper are as follows:The first chapter states the current circumstance of worldwide and domestic water resource; brings forward to the possibility and imminency of developing NMR instrument independently to find water, introduces the production and application of NMR instrument domestic and foreign.The second chapter expounds the NMR water-power modules for the overall design. Detailed summary of the functional power modulesThe power modules to the design plan and proposed design specifications which should pay attention to the problemThe third chapter described the NMR water-power modules hardware design, including the DC-DC converter in the selection, show circuit, control and acquisition system design, voltage conversion circuit design, the use of isolation amplifier and capacitor quality The detection system in the construction of the power modules of the hardware design.The fourth chapter introduced the equipment control system software used in the work process and the agreement format, the final details on the realization of software modules.The fifth chapter demodulated the system of testing and the results of the analysis, testing a module of the performance indicators and in the field to verify the experiment, the experimental data were analyzed to determine the reliability of the module.The sixth chapter summarizes all this paper, and puts up some questions which should be researched continuously in the future.