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Multichannel nuclear magnetic resonance underground water detecting instrument and field work method thereof

A nuclear magnetic resonance and detector technology, which is used in electronic magnetic resonance/nuclear magnetic resonance detection, water resource assessment, climate sustainability, etc. problems, to achieve the effect of improving anti-jamming capability, improving lateral resolution and accuracy, and reducing risks

Active Publication Date: 2013-04-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The nuclear magnetic resonance detection method is currently the only direct groundwater detection method. Its one-dimensional detection method has been relatively mature and has been widely used. However, when detecting disaster water sources such as dams and landslides, the one-dimensional nuclear magnetic resonance groundwater Detection instruments cannot accurately explain the distribution of groundwater, especially in areas with relatively high noise, such as near villages and cities, ordinary one-dimensional nuclear magnetic resonance groundwater detection instruments may not be used, and cannot accurately map the distribution of groundwater resources
[0003] CN102053280A discloses "nuclear magnetic resonance groundwater detection system and detection method with reference coil", which uses the same coil as the transmitting coil and receiving coil in time-sharing, and multiple reference coils collect the noise near the measuring point, and finally eliminate the noise through self-adaption This method improves the anti-interference ability of nuclear magnetic resonance instruments, but the one-dimensional detection method makes it difficult to explain the distribution of groundwater resources well under complex landform conditions.
This method can effectively improve the accuracy of water resources detection, but it cannot realize two-dimensional detection, nor can it be used in noisy areas

Method used

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  • Multichannel nuclear magnetic resonance underground water detecting instrument and field work method thereof
  • Multichannel nuclear magnetic resonance underground water detecting instrument and field work method thereof
  • Multichannel nuclear magnetic resonance underground water detecting instrument and field work method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] The computer 1 is connected with the transmitter 2 through the transmitter communication interface 27, the computer 1 is connected with the receiver input communication interface 38 of the first receiver 3 through the receiver input communication interface 38, and the first receiver 3 is connected with the receiver output communication interface 37 Connect with the receiver input communication interface 38 of the 2nd receiver 4, the 2nd receiver 4 is connected with the receiver input communication interface 38 of the 3rd receiver 5 through the receiver output communication interface 37, the 3rd receiver 5 passes the receiver The output communication interface 37 is connected with the receiver input communication interface 38 of the 4th receiver 6, the 4th receiver 6 is connected with the receiver input communication interface 38 of the 5th receiver 7 through the receiver output communication interface 37, the 5th receiver 7 is connected with the receiver input communicat...

Embodiment 2

[0046] The computer 1 is connected with the transmitter 2 through the transmitter communication interface 27, the computer 1 is connected with the receiver input communication interface 38 of the first receiver 3 through the receiver input communication interface 38, and the first receiver 3 is connected with the receiver output communication interface 37 Connect with the receiver input communication interface 38 of the 2nd receiver 4, the 2nd receiver 4 is connected with the receiver input communication interface 38 of the 3rd receiver 5 through the receiver output communication interface 37, the 3rd receiver 5 passes the receiver The output communication interface 37 is connected with the receiver input communication interface 38 of the 4th receiver 6, the 4th receiver 6 is connected with the receiver input communication interface 38 of the 5th receiver 7 through the receiver output communication interface 37, the 5th receiver 7 is connected with the receiver input communicat...

Embodiment 3

[0054] The computer 1 is connected with the transmitter 2 through the transmitter communication interface 27, the computer 1 is connected with the receiver input communication interface 38 of the first receiver 3 through the receiver input communication interface 38, and the first receiver 3 is connected with the receiver output communication interface 37 Connect with the receiver input communication interface 38 of the 2nd receiver 4, the 2nd receiver 4 is connected with the receiver input communication interface 38 of the 3rd receiver 5 through the receiver output communication interface 37, the 3rd receiver 5 passes the receiver The output communication interface 37 is connected with the receiver input communication interface 38 of the 4th receiver 6, the 4th receiver 6 is connected with the receiver input communication interface 38 of the 5th receiver 7 through the receiver output communication interface 37, the 5th receiver 7 is connected with the receiver input communicat...

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Abstract

The invention relates to a multichannel nuclear magnetic resonance underground water detecting instrument and a field work method thereof. Working parameters of a transmitter and all receivers are configured by a computer, and operating modes of all receivers can be switched between a nuclear magnetic resonance measurement mode and a reference nuclear magnetic resonance measurement mode. Each receiver can connect receiving coils and reference coils, selection of the number of the reference coils can be determined according to a local environmental noise level, and at most eight reference coils can be connected. When the multichannel nuclear magnetic resonance underground water detecting instrument with the reference coils is used, denoising processing is conducted on an obtained nuclear magnetic resonance signal by a self-adaption denoising algorithm, and two-dimension detection on an underground water body is achieved by a multichannel measurement mode. When a transverse resolution of detection is effectively improved, simultaneously signal to noise ratio of the nuclear magnetic resonance signal is improved. The multichannel nuclear magnetic resonance underground water detecting instrument and the field work method thereof are beneficial to conducting nuclear magnetic resonance detection on a detected area under a complex geomorphological condition and a large-noise environment.

Description

technical field [0001] The present invention relates to a geophysical prospecting equipment and method, in particular to realize the two-dimensional detection of groundwater resources through a multi-channel nuclear magnetic resonance groundwater detector with reference coils, and to realize reference denoising earth through one or more reference coils Physical prospecting equipment and methods. Background technique [0002] The nuclear magnetic resonance detection method is currently the only direct groundwater detection method. Its one-dimensional detection method has been relatively mature and has been widely used. However, when detecting disaster water sources such as dams and landslides, the one-dimensional nuclear magnetic resonance groundwater Detection instruments cannot accurately explain the distribution of groundwater, especially in areas with relatively high noise, such as near villages and cities, ordinary one-dimensional nuclear magnetic resonance groundwater d...

Claims

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Application Information

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IPC IPC(8): G01V3/14
CPCY02A90/30
Inventor 林婷婷林君史文龙蒋川东万玲齐心
Owner JILIN UNIV
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