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 machine and the software to analysis NMR signal. The paper totally includes seven 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. At the end of the chapter advanced the content of the paper.
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