Design The Transmitter Of Array MRS For Water Detection

MRS（magnetic resonance sounding）is a method of directly detectingunderground water. At present, the methods are widely applied to evaluateunderground water. Through inversion calculation, we can know thehydro-geological information by water content, depth of the water, permeability.But, for mined-out area of groundwater, southwest hills and karst fissure waterand other complex water detection, the method also has some flaws, such aspoor imaging accuracy, limiting resolution, ineffective. So, developing the newtype of efficient high resolution ground MRS detection system is the urgentneed. According to the above requirements, we use multiple sets of coilsynchronous measurement way. Only one measurement can be instead of asingle coil more measurement and improve the efficiency of detection andresolution.This article is design the transmitter of array MRS for water detection. The mainwork is as follows: The design of high-power power supply, launch control signalgeneration circuit and the H bridge circuit consisting of IGBT. The power designconsists of Constant current source module, energy storage unit and intelligentmonitoring unit. Through comparing the charging mode, the energy storage unitscheme and the design of intelligent monitoring unit boards, to complete the design ofhigh-power power supply. Launch control part is mainly composed of control board,IGBT drive unit and H bridge circuit composed of IGBT. Through the launch controlboard to produce control signal to control H bridge circuit on and off, converts DCvoltage to high voltage square wave, using series resonance circuit, high voltagesquare wave can be converted to high voltage sinusoidal current signal, excitationmagnetic field to stimulate hydrogen protons in groundwater. At the same time, thelaunch control board will provide array receiver acquisition synchronization signal.Through the research of the above content, this paper finished on the whole aswell as the compatibility analysis, design, and formed an independent transmitter. Itsimplementation, Promoting nuclear magnetic resonance2D/3D imaging and its arrayof groundwater surface detection system research has certain significance.