Nuclear magnetic resonance ground water detection system with reference coils and detection method

A reference coil and nuclear magnetic resonance technology, applied in electron magnetic resonance/nuclear magnetic resonance detection, water resources assessment, climate sustainability, etc., to improve the anti-interference performance of the instrument

Inactive Publication Date: 2011-05-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art, to provide a nuclear magnetic resonance groundwater detection system and detection method ...

Method used

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  • Nuclear magnetic resonance ground water detection system with reference coils and detection method
  • Nuclear magnetic resonance ground water detection system with reference coils and detection method
  • Nuclear magnetic resonance ground water detection system with reference coils and detection method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The nuclear magnetic resonance groundwater detection system with a reference coil is connected to the control system 2 by the computer 1 through the serial port line, the computer 1 is connected to the transmission power supply 3 through the control line, the control system 2 is connected to the transmission control drive 4 through the signal line, and the transmission control drive 4. Connect the transmitting / receiving coil 9 through the high-power H bridge circuit 7 through the signal line, the control system 2 is connected with the receiving control unit 5 through the control line, and the receiving control unit 5 is connected with the multi-channel A / D acquisition unit 16 through the control line, The multi-channel A / D acquisition unit 16 is connected to the computer 1 through the data line, the control system 2 is connected to the transceiver switch 6 and the first switch 13 through the control line, and the transmitting power supply 3 is connected to the high-power ...

Embodiment 2

[0052] The computer 1 is connected with the control system 2 through the serial port line, the computer 1 is connected with the transmission power supply 3 through the control line, the control system 2 is connected with the transmission control drive 4 through the signal line, and the transmission control drive 4 is connected with the high-power H-bridge circuit 7 through the signal line. The transmitting / receiving coil 9 is connected, the control system 2 is connected with the receiving control unit 5 through the control line, the receiving control unit 5 is connected with the multi-channel A / D acquisition unit 16 through the control line, and the multi-channel A / D acquisition unit 16 is connected with the multi-channel A / D acquisition unit through the data line. The computer 1 is connected, the control system 2 is connected with the transceiver switch 6, the first switch 13, and the second switch 18 through the control line, the transmission power supply 3 is connected with t...

Embodiment 3

[0062] The computer 1 is connected with the control system 2 through the serial port line, the computer 1 is connected with the transmission power supply 3 through the control line, the control system 2 is connected with the transmission control drive 4 through the signal line, and the transmission control drive 4 is connected with the high-power H-bridge circuit 7 through the signal line. The transmitting / receiving coil 9 is connected, the control system 2 is connected with the receiving control unit 5 through the control line, the receiving control unit 5 is connected with the multi-channel A / D acquisition unit 16 through the control line, and the multi-channel A / D acquisition unit 16 is connected with the multi-channel A / D acquisition unit through the data line. The computer 1 is connected, the control system 2 is connected with the transceiver switch 6, the first switch 13, the second switch 18 ... and even the eighth switch 22 through the control line, and the transmitting ...

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PUM

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Abstract

The invention relates to a nuclear magnetic resonance ground water detection system with reference coils and a detection method. All-waveform data of nuclear magnetic resonance signals in a transmitting/receiving coil and noise signals in the reference coils are synchronously acquired through a plurality of paths of A/D acquiring units; the distribution of optimal positions and quantity of the reference coils is realized through calculating the maximum correlation of the noise signals and the nuclear magnetic resonance signals, which are acquired by the reference coils; and under the condition of unknown signal and noise statistical properties, noise in the nuclear magnetic resonance signals obtained by the transmitting/receiving coil is maximally offset by adopting a variable step adaptive algorithm, the nuclear magnetic resonance signals are extracted under the interference of multi-field source complex strong noise, thus the problems of multiple interferences of nuclear magnetic resonance detection near villages and in neighboring regions of cities and difficulty of separating multiple kinds of interference noise data are effectively solved, the interference resistance of instruments is improved, and a reliable detection device and method are provided for searching underground water near villages and in neighboring regions of cities.

Description

technical field [0001] The invention relates to a nuclear magnetic resonance detection system for searching groundwater, in particular to a nuclear magnetic resonance groundwater detection system and a detection method with a reference coil. Background technique [0002] The nuclear magnetic resonance (Nuclear Magnetic Resonance, referred to as NMR) groundwater detection method is a geophysical method for directly exploring groundwater. Compared with traditional geophysical groundwater exploration methods, it has high resolution, high efficiency, rich information and unique solution Advantages: the depth, thickness, water content, and average porosity of the aquifer can be determined without drilling, and the cost of completing a nuclear magnetic resonance sounding point is only 1 / 10 of the cost of a hydrogeological exploration drilling. [0003] However, in the NMR groundwater detection method, the detection object is the spin magnetic moment of the underground atomic nucle...

Claims

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Application Information

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IPC IPC(8): G01V3/14
CPCY02A90/30
Inventor 田宝凤段清明林君蒋川东易晓峰郝荟萃李鹏飞万琦
Owner JILIN UNIV
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