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

[0037] Example 1

[0038] The computer 1 is connected to the transmitter 2 through the transmitter communication interface 27, the computer 1 is connected to 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 through the receiver output communication interface 37. Connected to the receiver input communication interface 38 of the second receiver 4, the second receiver 4 is connected to the receiver input communication interface 38 of the third receiver 5 through the receiver output communication interface 37, and the third receiver 5 is connected through the receiver The output communication interface 37 is connected to the receiver input communication interface 38 of the fourth receiver 6, the fourth receiver 6 is connected to the receiver input communication interface 38 of the fifth receiver 7 through the receiver output communication interface 37, and the fifth receiver 7 is connected to the receiver input communication interface 38 of the sixth receiver 8 through the receiver output communication interface 37, and the sixth receiver 8 is connected to the receiver input communication interface 38 of the seventh receiver 9 through the receiver output communication interface 37, The seventh receiver 9 is connected to the receiver input communication interface 38 of the eighth receiver 10 through the receiver output communication interface 37, and the transmitter 2 is synchronized with the receiver signal of the first receiver 3 through the transmitter signal synchronization acquisition interface 29. The input interface 40 is connected, the first receiver 3 is connected to the receiver signal synchronous acquisition input interface 40 of the second receiver 4 through the receiver signal synchronous acquisition output interface 43, and the second receiver 4 is connected through the receiver signal synchronous acquisition output interface 43 The third receiver 5 is connected to the receiver signal synchronization acquisition input interface 40 of the third receiver 5. The third receiver 5 is connected to the receiver signal synchronization acquisition input interface 40 of the fourth receiver 6 through the receiver signal synchronization acquisition output interface 43. The receiver 6 is connected to the receiver signal synchronous acquisition input interface 40 of the fifth receiver 7 through the receiver signal synchronous acquisition output interface 43, and the fifth receiver 7 is connected to the sixth receiver 8 through the receiver signal synchronous acquisition output interface 43. The receiver signal synchronization acquisition input interface 40 is connected, the sixth receiver 8 is connected to the receiver signal synchronization acquisition input interface 40 of the seventh receiver 9 through the receiver signal synchronization acquisition output interface 43, and the seventh receiver 9 passes the receiver signal The synchronous acquisition output interface 43 is connected to the receiver signal synchronous acquisition input interface 40 of the eighth receiver 10, the transmitter 2 is connected to the transmitting coil 44 through the nuclear magnetic resonance transmitting coil interface 33, and the first receiving coil 11 is connected through the nuclear magnetic resonance receiving coil interface 34 Connected to the first receiver 3, the second receiving coil 12 is connected to the second receiver 4 through the nuclear magnetic resonance receiving coil interface 34, the third receiving coil 13 is connected to the third receiver 5 through the nuclear magnetic resonance receiving coil interface 34, and the fourth The receiving coil 14 is connected to the fourth receiver 6 through the nuclear magnetic resonance receiving coil interface 34, the fifth receiving coil 15 is connected to the fifth receiver 7 through the nuclear magnetic resonance receiving coil interface 34, and the sixth receiving coil 16 is connected through the nuclear magnetic resonance receiving coil interface 34 Connected to the sixth receiver 8, the seventh receiving coil 17 is connected to the seventh receiver 9 through the nuclear magnetic resonance receiving coil interface 34, and the eighth receiving coil 18 is connected The NMR receiving coil interface 34 is connected to the eighth receiver 10, the first reference coil 19 is connected to the first receiver 3 through the reference coil interface 41, and the second reference coil 20 is connected to the second receiver 4 through the reference coil interface 41 , The third reference coil 21 is connected to the third receiver 5 through the reference coil interface 41, the fourth reference coil 22 is connected to the fourth receiver 6 through the reference coil interface 41, and the fifth reference coil 23 is connected to the fifth receiver through the reference coil interface 41. The receiver 7 is connected, the sixth reference coil 24 is connected to the sixth receiver 8 through the reference coil interface 41, the seventh reference coil 25 is connected to the seventh receiver 9 through the reference coil interface 41, and the eighth reference coil 26 is connected through the reference coil interface 41 is connected to the eighth receiver 10.

[0039] Detection method of multi-channel nuclear magnetic resonance groundwater detector with a reference coil:

[0040] a. Select a measuring point in the measuring area, lay the transmitting coil 44 with the measuring point as the center, and arrange the first receiving coil 11, the second receiving coil 12, ... and even the first receiving coil 11, the second receiving coil 12, ... 8 receiving coil 18;

[0041] b. Lay the first reference coil 19, the second reference coil 20, and even the eighth reference coil 26 in the measurement area, and use a reference coil to collect noise. The reference coil number is the first reference coil 19, and it is laid It is close to the noise source and the distance from the transmitting coil 2 should be at least the length of the side of the transmitting coil 2 to ensure that the reference coil receives noise instead of nuclear magnetic resonance signals;

[0042] c. Configure the operating parameters of the transmitter 2 and the first receiver 3, the second receiver 4... and even the eighth receiver 10, select the first receiver 3 to work in the reference NMR measurement mode, and select the second The receiver 4, the third receiver 5, ... and the eighth receiver 10 work in the nuclear magnetic resonance measurement mode;

[0043] d. Run the instrument system to perform a multi-channel nuclear magnetic resonance measurement with a reference coil in the measurement area, process the returned nuclear magnetic resonance signal data and noise signal data, and calculate the maximum between the nuclear magnetic resonance signal data and the noise signal data Correlation, if the maximum correlation is less than 0.7, it means that more reference coils should be used or the placement of the used reference coils should be reconsidered, repeat b and c; if the maximum correlation line is greater than 0.7, the number of reference coils or The position has met the requirements of reference noise cancellation, then proceed to step e;

[0044] e. Perform data processing on the acquired nuclear magnetic resonance signal data and noise signal data that meet the requirements, and draw a two-dimensional distribution map of the groundwater body through inversion interpretation.

[0045] Example 2

[0046] The computer 1 is connected to the transmitter 2 through the transmitter communication interface 27, the computer 1 is connected to 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 through the receiver output communication interface 37. Connected to the receiver input communication interface 38 of the second receiver 4, the second receiver 4 is connected to the receiver input communication interface 38 of the third receiver 5 through the receiver output communication interface 37, and the third receiver 5 is connected through the receiver The output communication interface 37 is connected to the receiver input communication interface 38 of the fourth receiver 6, the fourth receiver 6 is connected to the receiver input communication interface 38 of the fifth receiver 7 through the receiver output communication interface 37, and the fifth receiver 7 is connected to the receiver input communication interface 38 of the sixth receiver 8 through the receiver output communication interface 37, and the sixth receiver 8 is connected to the receiver input communication interface 38 of the seventh receiver 9 through the receiver output communication interface 37, The seventh receiver 9 is connected to the receiver input communication interface 38 of the eighth receiver 10 through the receiver output communication interface 37, and the transmitter 2 is synchronized with the receiver signal of the first receiver 3 through the transmitter signal synchronization acquisition interface 29. The input interface 40 is connected, the first receiver 3 is connected to the receiver signal synchronous acquisition input interface 40 of the second receiver 4 through the receiver signal synchronous acquisition output interface 43, and the second receiver 4 is connected through the receiver signal synchronous acquisition output interface 43 The third receiver 5 is connected to the receiver signal synchronization acquisition input interface 40 of the third receiver 5. The third receiver 5 is connected to the receiver signal synchronization acquisition input interface 40 of the fourth receiver 6 through the receiver signal synchronization acquisition output interface 43. The receiver 6 is connected to the receiver signal synchronous acquisition input interface 40 of the fifth receiver 7 through the receiver signal synchronous acquisition output interface 43, and the fifth receiver 7 is connected to the sixth receiver 8 through the receiver signal synchronous acquisition output interface 43. The receiver signal synchronization acquisition input interface 40 is connected, the sixth receiver 8 is connected to the receiver signal synchronization acquisition input interface 40 of the seventh receiver 9 through the receiver signal synchronization acquisition output interface 43, and the seventh receiver 9 passes the receiver signal The synchronous acquisition output interface 43 is connected to the receiver signal synchronous acquisition input interface 40 of the eighth receiver 10, the transmitter 2 is connected to the transmitting coil 44 through the nuclear magnetic resonance transmitting coil interface 33, and the first receiving coil 11 is connected through the nuclear magnetic resonance receiving coil interface 34 Connected to the first receiver 3, the second receiving coil 12 is connected to the second receiver 4 through the nuclear magnetic resonance receiving coil interface 34, the third receiving coil 13 is connected to the third receiver 5 through the nuclear magnetic resonance receiving coil interface 34, and the fourth The receiving coil 14 is connected to the fourth receiver 6 through the nuclear magnetic resonance receiving coil interface 34, the fifth receiving coil 15 is connected to the fifth receiver 7 through the nuclear magnetic resonance receiving coil interface 34, and the sixth receiving coil 16 is connected through the nuclear magnetic resonance receiving coil interface 34 Connected to the sixth receiver 8, the seventh receiving coil 17 is connected to the seventh receiver 9 through the nuclear magnetic resonance receiving coil interface 34, and the eighth receiving coil 18 is connected The NMR receiving coil interface 34 is connected to the eighth receiver 10, the first reference coil 19 is connected to the first receiver 3 through the reference coil interface 41, and the second reference coil 20 is connected to the second receiver 4 through the reference coil interface 41 , The third reference coil 21 is connected to the third receiver 5 through the reference coil interface 41, the fourth reference coil 22 is connected to the fourth receiver 6 through the reference coil interface 41, and the fifth reference coil 23 is connected to the fifth receiver through the reference coil interface 41. The receiver 7 is connected, the sixth reference coil 24 is connected to the sixth receiver 8 through the reference coil interface 41, the seventh reference coil 25 is connected to the seventh receiver 9 through the reference coil interface 41, and the eighth reference coil 26 is connected through the reference coil interface 41 is connected to the eighth receiver 10.

[0047] Detection method of multi-channel nuclear magnetic resonance groundwater detector with four reference coils:

[0048] a. Select a measuring point in the measuring area, lay the transmitting coil 44 with the measuring point as the center, and arrange the first receiving coil 11, the second receiving coil 12, ... and even the first receiving coil 11, the second receiving coil 12, ... 8 receiving coil 18;

[0049] b. Lay the first reference coil 19, the second reference coil 20, and even the eighth reference coil 26 in the measurement area, and use four reference coils to collect noise. The reference coil numbers are the first reference coil 19 and the third reference coil. The reference coil 21, the fifth reference coil 23, and the seventh reference coil 25 should be laid close to the noise source and the distance from the transmitter coil 2 should be at least the side length of the transmitter coil 2 to ensure that the reference coil is receiving Noise instead of NMR signal;

[0050] c. Configure the operating parameters of the transmitter 2 and the first receiver 3, the second receiver 4... and even the eighth receiver 10, select the first receiver 3, the third receiver 5, and the fifth receiver 7 , The seventh receiver 9 works in the nuclear magnetic resonance measurement mode with reference, and the second receiver 4, the fourth receiver 6, the sixth receiver 8, and the eighth receiver 10 work in the nuclear magnetic resonance measurement mode;

[0051] d. Run the instrument system to perform a multi-channel nuclear magnetic resonance measurement with four reference coils in the measurement area, process the returned nuclear magnetic resonance signal data and noise signal data, and calculate the difference between the nuclear magnetic resonance signal data and the noise signal data Maximum correlation, if the maximum correlation is less than 0.7, it means that more reference coils should be used or the placement of the used reference coils should be reconsidered, repeat b and c; if the maximum correlation line is greater than 0.7, indicate the number of reference coils Or the position already meets the requirements of reference noise cancellation, proceed to step e;

[0052] e. Perform data processing on the acquired nuclear magnetic resonance signal data and noise signal data that meet the requirements, and draw a two-dimensional distribution map of the groundwater body through inversion interpretation.

[0053] Example 3

[0054] The computer 1 is connected to the transmitter 2 through the transmitter communication interface 27, the computer 1 is connected to 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 through the receiver output communication interface 37. Connected to the receiver input communication interface 38 of the second receiver 4, the second receiver 4 is connected to the receiver input communication interface 38 of the third receiver 5 through the receiver output communication interface 37, and the third receiver 5 is connected through the receiver The output communication interface 37 is connected to the receiver input communication interface 38 of the fourth receiver 6, the fourth receiver 6 is connected to the receiver input communication interface 38 of the fifth receiver 7 through the receiver output communication interface 37, and the fifth receiver 7 is connected to the receiver input communication interface 38 of the sixth receiver 8 through the receiver output communication interface 37, and the sixth receiver 8 is connected to the receiver input communication interface 38 of the seventh receiver 9 through the receiver output communication interface 37, The seventh receiver 9 is connected to the receiver input communication interface 38 of the eighth receiver 10 through the receiver output communication interface 37, and the transmitter 2 is synchronized with the receiver signal of the first receiver 3 through the transmitter signal synchronization acquisition interface 29. The input interface 40 is connected, the first receiver 3 is connected to the receiver signal synchronous acquisition input interface 40 of the second receiver 4 through the receiver signal synchronous acquisition output interface 43, and the second receiver 4 is connected through the receiver signal synchronous acquisition output interface 43 The third receiver 5 is connected to the receiver signal synchronization acquisition input interface 40 of the third receiver 5. The third receiver 5 is connected to the receiver signal synchronization acquisition input interface 40 of the fourth receiver 6 through the receiver signal synchronization acquisition output interface 43. The receiver 6 is connected to the receiver signal synchronous acquisition input interface 40 of the fifth receiver 7 through the receiver signal synchronous acquisition output interface 43, and the fifth receiver 7 is connected to the sixth receiver 8 through the receiver signal synchronous acquisition output interface 43. The receiver signal synchronization acquisition input interface 40 is connected, the sixth receiver 8 is connected to the receiver signal synchronization acquisition input interface 40 of the seventh receiver 9 through the receiver signal synchronization acquisition output interface 43, and the seventh receiver 9 passes the receiver signal The synchronous acquisition output interface 43 is connected to the receiver signal synchronous acquisition input interface 40 of the eighth receiver 10, the transmitter 2 is connected to the transmitting coil 44 through the nuclear magnetic resonance transmitting coil interface 33, and the first receiving coil 11 is connected through the nuclear magnetic resonance receiving coil interface 34 Connected to the first receiver 3, the second receiving coil 12 is connected to the second receiver 4 through the nuclear magnetic resonance receiving coil interface 34, the third receiving coil 13 is connected to the third receiver 5 through the nuclear magnetic resonance receiving coil interface 34, and the fourth The receiving coil 14 is connected to the fourth receiver 6 through the nuclear magnetic resonance receiving coil interface 34, the fifth receiving coil 15 is connected to the fifth receiver 7 through the nuclear magnetic resonance receiving coil interface 34, and the sixth receiving coil 16 is connected through the nuclear magnetic resonance receiving coil interface 34 Connected to the sixth receiver 8, the seventh receiving coil 17 is connected to the seventh receiver 9 through the nuclear magnetic resonance receiving coil interface 34, and the eighth receiving coil 18 is connected The NMR receiving coil interface 34 is connected to the eighth receiver 10, the first reference coil 19 is connected to the first receiver 3 through the reference coil interface 41, and the second reference coil 20 is connected to the second receiver 4 through the reference coil interface 41 , The third reference coil 21 is connected to the third receiver 5 through the reference coil interface 41, the fourth reference coil 22 is connected to the fourth receiver 6 through the reference coil interface 41, and the fifth reference coil 23 is connected to the fifth receiver through the reference coil interface 41. The receiver 7 is connected, the sixth reference coil 24 is connected to the sixth receiver 8 through the reference coil interface 41, the seventh reference coil 25 is connected to the seventh receiver 9 through the reference coil interface 41, and the eighth reference coil 26 is connected through the reference coil interface 41 is connected to the eighth receiver 10.

[0055] Detection method of multi-channel nuclear magnetic resonance groundwater detector with eight reference coils:

[0056] a. Select a measuring point in the measuring area, lay the transmitting coil 44 with the measuring point as the center, and arrange the first receiving coil 11, the second receiving coil 12, ... and even the first receiving coil 11, the second receiving coil 12, ... 8 receiving coil 18;

[0057] b. Lay the first reference coil 19, the second reference coil 20,... and even the eighth reference coil 26 in the measurement area. Eight reference coils are used to collect noise. The reference coil numbers are the first reference coil 19 and the second reference coil. The reference coil 20,... and the eighth reference coil 26 are laid close to the noise source, and the distance from the transmitting coil 2 should be at least the side length of the transmitting coil 2 to ensure that the reference coil receives noise instead of NMR signal;

[0058] c. Configure the working parameters of the transmitter 2 and the first receiver 3, the second receiver 4... and even the eighth receiver 10, select the first receiver 3, the second receiver 4,... and even the eighth receiver The receiver 10 works in a reference nuclear magnetic resonance measurement mode;

[0059] d. Run the instrument system to perform a multi-channel nuclear magnetic resonance measurement with eight reference coils in the measurement area, process the returned nuclear magnetic resonance signal data and noise signal data, and calculate the difference between the nuclear magnetic resonance signal data and the noise signal data Maximum correlation, if the maximum correlation is less than 0.7, it means that more reference coils should be used or the placement of the used reference coils should be reconsidered, repeat b and c; if the maximum correlation line is greater than 0.7, indicate the number of reference coils Or the position already meets the requirements of reference noise cancellation, proceed to step e;

[0060] e. Perform data processing on the acquired nuclear magnetic resonance signal data and noise signal data that meet the requirements, and draw a two-dimensional distribution map of the groundwater body through inversion interpretation.