Hydrocarbon-contaminated shallow groundwater magnetic resonance detection device and detection method
A technology of polluting water and magnetic resonance, which is applied in electron magnetic resonance/nuclear magnetic resonance detection, nuclear magnetic resonance analysis, etc., can solve the problems of time-consuming and laborious, need to drill wells, and can not distinguish whether the ground is water or oil, etc., to overcome Non-uniform magnetic field, the effect of improving the signal-to-noise ratio
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Embodiment 1
[0045] Computer 1 is connected to MCU3 through a USB to 485 cable, computer 1 is connected to signal acquisition card 4 through a network cable, MCU3 is connected to signal acquisition card 4 through a synchronous signal line, signal acquisition card 4 is connected to signal conditioning circuit 8 through a signal transmission line, and the signal conditioning The circuit 8 is connected to the receiving coil 11, the signal conditioning circuit 8 is connected to the MCU3 for configuration, the computer 1 is connected to the transmitting logic and control unit 2, the MCU3 is connected to the transmitting logic and control unit 2, and the transmitting logic and control unit 2 is connected to the DCDC module 5 , the transmitting logic and control unit 2 is connected to the energy storage transmitting unit 6, the energy storage transmitting unit 6 is connected to the voltage and current acquisition unit 7, the voltage and current acquisition unit 7 is connected to the MCU3, the energ...
Embodiment 2
[0058] The magnetic resonance detection method of hydrocarbon-polluted shallow groundwater works according to the following steps:
[0059]a. The permanent magnet 12 is placed in the area to be tested, and the magnetic field strength of the area to be tested is increased by about 10 times. According to the principle of nuclear magnetic resonance, the corresponding transmission frequency is also increased by about 10 times, and the frequency of the received signal is also increased by about 10 times. Spread the transmitting coil 10 and the receiving coil 11 respectively in the uniform range of the magnetic field within the range of the permanent magnet 12, the transmitting coil 10 and the receiving coil 11 are all laid into a 5-meter-long square and the receiving coil 11 is laid on the inner side of the transmitting coil 10 and basically overlaps place.
[0060] b. Connect the transmitting coil 10 to both ends of the bridge, connect the receiving coil 11 to the two ends of the ...
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