CN105572611B - A kind of magnetostatic field nuclear-magnetism effect analysis system - Google Patents
A kind of magnetostatic field nuclear-magnetism effect analysis system Download PDFInfo
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- CN105572611B CN105572611B CN201610122063.3A CN201610122063A CN105572611B CN 105572611 B CN105572611 B CN 105572611B CN 201610122063 A CN201610122063 A CN 201610122063A CN 105572611 B CN105572611 B CN 105572611B
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- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
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Abstract
The invention discloses a kind of magnetostatic field nuclear-magnetism effect analysis systems, including：Minute sample container contains hydrogen solution for loading with predetermined longitudinal relaxation time.Radio-frequency pulse emitter, the command signal sent out for receiving CPU, and radio-frequency pulse is generated by spin-echo sequence according to the command signal and contains hydrogen solution generation nuclear magnetic resonance to encourage.Miniature coils are used for transmission and the nuclear magnetic signal generated after nuclear magnetic resonance occur containing hydrogen solution.Signal amplifier, the nuclear magnetic signal for acquiring miniature coils transmission, and the nuclear magnetic signal is amplified.CPU, the intensity for recording amplified nuclear magnetic signal, and draw the distribution map of the corresponding nuclear magnetic signal intensity of test space each point.Scheme through the invention, can carry out the nuclear-magnetism effect analysis of non-homogeneous magnetostatic field, and fill up the blank of 2MHz or less static magnetic field measurements.
Description
Technical field
The present invention relates to magnetostatic field nuclear-magnetism effect analysis field more particularly to a kind of magnetostatic field nuclear-magnetism effect analysis systems.
Background technology
Low-field nuclear magnetic resonance apparatus is in terms of oil and gas prospect exploitation, food quality detects, medical image analysis
Etc. have a wide range of applications.Magnetostatic field is that the most basic of nmr phenomena is wanted to the response of sample to be tested nuclear magnetic signal
It asks, but conventional Nuclear Magnetic Resonance Measurement instrument is very high to the uniformity requirement of magnetostatic field, that is, low field homogeneous static magnetic field can only be carried out
The analysis of nuclear-magnetism effect.With the continuous development of technology, the analysis of the non-homogeneous magnetostatic field nuclear-magnetism effect of the low field with gradient also obtains
To more and more applications.It is therefore desirable to be made further research to the non-homogeneous magnetostatic field nuclear-magnetism effect of low field.
Invention content
To solve the above-mentioned problems, the present invention proposes a kind of magnetostatic field nuclear-magnetism effect analysis system, can carry out non-equal
The nuclear-magnetism effect analysis of even magnetostatic field, and filled up the blank of 2MHz or less static magnetic field measurements.
In order to achieve the above object, the present invention proposes a kind of magnetostatic field nuclear-magnetism effect analysis system, which includes：It is micro-
Type sample container, radio-frequency pulse emitter, miniature coils, signal amplifier and central processor CPU.
Minute sample container contains hydrogen solution for loading with predetermined longitudinal relaxation time.
Radio-frequency pulse emitter, the command signal sent out for receiving CPU, and spin echo is pressed according to the command signal
Sequence generates radio-frequency pulse and contains hydrogen solution generation nuclear magnetic resonance to encourage.
Miniature coils are used for transmission and the nuclear magnetic signal generated after nuclear magnetic resonance occur containing hydrogen solution.
Signal amplifier, the nuclear magnetic signal for acquiring miniature coils transmission, and the nuclear magnetic signal is amplified.
CPU, the intensity for recording amplified nuclear magnetic signal, and it is strong to draw the corresponding nuclear magnetic signal of test space each point
The distribution map of degree.
Preferably, minute sample container is positioned in miniature coils during test, and the outer wall of minute sample container with
The inner wall of miniature coils is interference fit.
Wherein, the internal diameter of miniature coils is millimeter mm magnitudes；The outer diameter of minute sample container is less than or equal to 5mm.
Preferably, it is copper-bath to contain hydrogen solution.
Predetermined longitudinal relaxation time is 100 milliseconds of ms.
Minute sample container uses polytetrafluoro material.
Miniature coils are internal loopback radio-frequency coil.
Signal magnitude handled by signal amplifier is V grades of microvolt μ.
Preferably, the both ends of miniature coils are connected with the input terminal of signal amplifier, the output end and CPU of signal amplifier
It is connected.
Preferably, which further includes：Three dimensional coordinate space positioning device；Three dimensional coordinate space positioning device is for adjusting
And position solid space coordinate of the miniature coils in the test space.
Preferably, three dimensional coordinate space positioning device includes：Stepper motor and three-dimensional coordinate control device.
Stepper motor, for driving miniature coils rotation to adjust the position of miniature coils in the form of stepping.
Three-dimensional coordinate control device, the stepping rate for controlling stepper motor and stepping accuracy, and determine miniature coils
Carry out the solid space coordinate after the adjustment of position.
Wherein, miniature coils are connected with the stepping axis of stepper motor；Stepper motor is connected with three-dimensional coordinate control device；Three
Dimension coordinate control device is connected with CPU.
Preferably, stepper motor is nonferromugnetic material；The stepping accuracy of stepper motor is mm grades.
Preferably, CPU, the position for being additionally operable to send out miniature coils to three-dimensional coordinate control device adjusts signal, and acquires
The solid space coordinate for the miniature coils that three-dimensional coordinate control device returns.
Preferably, which further includes：Magnet.
Magnet, for generating magnetostatic field；Miniature coils are placed in the magnetostatic field.
Preferably, which further includes：Three-dimensional fix workbench.
Three-dimensional fix workbench for fixed signal amplifier and places magnet.
Compared with prior art, the present invention includes：Minute sample container, for loading with predetermined longitudinal relaxation time
Containing hydrogen solution.Radio-frequency pulse emitter, the command signal sent out for receiving CPU, and pressed from cycle according to the command signal
Wave train generates radio-frequency pulse and contains hydrogen solution generation nuclear magnetic resonance to encourage.Miniature coils are used for transmission and core occur containing hydrogen solution
The nuclear magnetic signal generated after magnetic resonance.Signal amplifier, the nuclear magnetic signal for acquiring miniature coils transmission, and the nuclear-magnetism is believed
It number is amplified.CPU, the intensity for recording amplified nuclear magnetic signal, and draw the corresponding nuclear-magnetism letter of test space each point
The distribution map of number intensity.Scheme through the invention, can carry out the nuclear-magnetism effect analysis of non-homogeneous magnetostatic field, and fill up
The blank of 2MHz or less static magnetic field measurements.
Description of the drawings
The attached drawing in the embodiment of the present invention is illustrated below, the attached drawing in embodiment be for the present invention into one
Step understands, for explaining the present invention together with specification, does not constitute limiting the scope of the invention.
Fig. 1 is the magnetostatic field nuclear-magnetism effect analysis block diagram of system of the present invention；
Fig. 2 is operating diagram of the minute sample container miniature coils of the present invention in magnetostatic field；
Fig. 3 is the magnetostatic field nuclear-magnetism effect analysis simple system connection diagram of the present invention.
Specific implementation mode
For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings, not
It can be used for limiting the scope of the invention.
Low-field nuclear magnetic resonance apparatus is in terms of oil and gas prospect exploitation, food quality detects, medical image analysis
Etc. have a wide range of applications.Magnetostatic field is that the most basic of nmr phenomena is wanted to the response of sample to be tested nuclear magnetic signal
It asks, but conventional Nuclear Magnetic Resonance Measurement instrument is very high to the uniformity requirement of magnetostatic field, that is, low field homogeneous static magnetic field can only be carried out
The analysis of nuclear-magnetism effect.With the continuous development of technology, the analysis of the non-homogeneous magnetostatic field nuclear-magnetism effect of the low field with gradient also obtains
To more and more applications.
The progress of magnet simulation software still to be first passed through for the analysis of the non-homogeneous magnetostatic field nuclear-magnetism effect of low field limited at present
Meta analysis is processed after designing the magnet structure that can generate more uniform magnetostatic field, right after the processing is completed
Resonance zone to be measured carries out magnetic field detection using gaussmeter, and it is accurate to compare and analyze acquisition with FEM Numerical Simulation
Nuclear magnetic resonance magnetostatic field resonance zone.It can preferably obtain and verify with this method the magnet of low-field nuclear magnetic resonance apparatus
Distribution of static magnetic field, but the actually still analysis to low field homogeneous static magnetic field nuclear-magnetism effect, and nuclear magnetic resonance apparatus magnet
Magnetic field bump often has an impact nuclear magnetic signal response, and the size of this influence can not be directly obtained by gaussmeter
Analysis.Simultaneously because off-resonance effect, the influence to magnetic resonance signal of the orientation of magnetostatic field closes on resonant frequency and corresponds to magnetostatic field
Size can not all obtain contribution of magnetic resonance signal etc. by conventional static magnetic field measurements method.Nuclear magnetic resonance is utilized although having
The static magnetic analysis instrument of effect, but the magnetic field range analyzed be 2MHz or more, can not Accurate Analysis 0.5MHz-2MHz model
It encloses.The magnetostatic field measured simultaneously is homogeneous static magnetic field, can not be measured for non-homogeneous magnetostatic field.By above-mentioned analysis, have
Necessity invention is a to measure the non-homogeneous magnetostatic field of low-field nuclear magnetic resonance apparatus magnet to nuclear-magnetism using NMR response mechanism
The system of response intensity distributional analysis is to solve the above problems.
In order to achieve the above object, the present invention proposes a kind of magnetostatic field nuclear-magnetism effect analysis system 01, as shown in Figure 1,
System can directly obtain the nuclear magnetic signal intensive analysis of each position in instrument resonance zone through the invention, and be suitable for
Magnetic field range is the non-homogeneous magnetostatic field of 0.5MHz-2MHz.Specifically, which includes：Minute sample container 02, radio-frequency pulse
Emitter 03, miniature coils 04, signal amplifier 05 and central processor CPU 06.
Minute sample container 02 contains hydrogen solution for loading with predetermined longitudinal relaxation time.
Preferably, it is copper-bath to contain hydrogen solution.Predetermined longitudinal relaxation time is 100 milliseconds of ms.
In embodiments of the present invention, it in order to be analyzed distribution of static magnetic field using nuclear magnetic resonance principle, needs pre-
Miniature coils 04 are first designed, when wrapping up minute sample container 02 in the miniature coils 04, and placing short T1 relaxation in a reservoir
Between excitation sample.Since the sample in short T1 relaxation times can greatly reduce the time of measurement scheme of the present invention, therefore here
Use the T1 relaxation times for the copper-bath of 100ms or so.Also, minute sample container 02 in embodiments of the present invention is adopted
With polytetrafluoro material, in case hydrogenous material influences the nuclear magnetic signal of sample.To ensure the invariance of sample, in minute sample container
After being packed into sample in 02, the both ends of minute sample container 02 are blocked into fixation, it is ensured that minute sample container 02 is in seal shape
State.
Radio-frequency pulse emitter 03, the command signal sent out for receiving CPU, and pressed from cycle according to the command signal
Wave train generates radio-frequency pulse and contains hydrogen solution generation nuclear magnetic resonance to encourage.
In embodiments of the present invention, in order to encourage sample, radio-frequency pulse emitter 03 is needed to minute sample
Sample in container 02, i.e. copper-bath emit driving pulse, are placed in magnetostatic field with excitation and generate nuclear-magnetism containing hydrogen solution
Resonance.
In embodiments of the present invention, above-mentioned driving pulse is generated using spin echo mode, specifically, by from cycle
Before wave array generates driving pulse, the command signal that CPU is sent out is received, 90 ° of driving pulse is emitted according to the command signal,
Frequency can be induced after the driving pulse differentiates number FID signal, but FID signal is generally unable to measure, in the scheduled time
The complex phase driving pulse for emitting 180 ° behind interval again, to obtain spin echo array.
Miniature coils 04 are used for transmission and the nuclear magnetic signal generated after nuclear magnetic resonance occur containing hydrogen solution.
The Main Analysis object of the magnetostatic field nuclear-magnetism effect analysis system of the present invention is exactly that nuclear magnetic resonance occurs containing hydrogen solution
The nuclear magnetic signal generated afterwards, therefore, it is necessary to us to transmit out so that CPU is further analyzed, in this hair by the nuclear magnetic signal
In bright embodiment, it is exactly to transmit out the nuclear magnetic signal of generation to be pre-designed dress miniature coils 04.
In embodiments of the present invention, which is the high q-factor nuclear-magnetism radio-frequency coil of internal loopback.Internal coil diameter exists
Millimeter mm magnitudes are conducive to the cloth points for increasing resonance zone, improve resolution ratio.
Preferably, minute sample container 02 is positioned in miniature coils 04 during test, and minute sample container 02
The inner wall of outer wall and miniature coils 04 is interference fit.Here, interference fit is generally used in Machine Design, of the invention real
It applies in example, is in order to which the outer wall of minute sample container 02 to be close to the inner wall of miniature coils 04, to improve using interference fit
Fill factor.Signal-to-noise ratio can be improved by improving fill factor, while can also greatly improve the resolution ratio to static magnetic field measurements.
In embodiments of the present invention, in order to improve fill factor also miniature coils are done as possible it is small, in the above
Illustrate, the internal diameter of miniature coils 04 of the invention can reach mm magnitudes.In addition, in order to which the test point in region to be measured is divided
Cloth it is more as possible, minute sample container 02 is done small as possible, here, the outer diameter of minute sample container is less than or equal to 5mm.
Preferably, which further includes：Magnet 08.
Magnet 08, for generating magnetostatic field；Miniature coils 04 are placed in the magnetostatic field.
As shown in Fig. 2, being minute sample container 02 and miniature coils 04 operating diagram in magnetostatic field of the present invention.Its
In, 08 is the magnet of the present invention that can generate magnetostatic field, and 10 be the non-homogeneous magnetostatic field B0 that magnet 08 generates, will be micro-
Type sample container 02 is positioned in miniature coils 04, and minute sample container 02 and miniature coils 04 are positioned over together by magnet
In 08 magnetostatic field 10 generated.
Signal amplifier 05, the nuclear magnetic signal for acquiring miniature coils transmission, and the nuclear magnetic signal is amplified.
In embodiments of the present invention, signal amplification circuit, i.e. signal amplifier 05 of the invention has also been devised, to hydrogeneous molten
Liquid sample occurs the faint nuclear magnetic signal that nuclear magnetic resonance generates and is acquired, amplifies.
Preferably, the signal magnitude handled by signal amplifier 05 of the invention is V grades of microvolt μ.
CPU 06, the intensity for recording amplified nuclear magnetic signal, and draw the corresponding nuclear-magnetism letter of test space each point
The distribution map of number intensity.
In embodiments of the present invention, by above-mentioned various operations, after obtaining amplified nuclear magnetic signal, need through
It crosses CPU and further collect and processing is done to the nuclear magnetic signal of acquisition.Specifically, it is obtained from the test space by CPU records
Each nuclear magnetic signal, record each distributed point, i.e. nuclear magnetic signal on each coordinate where miniature coils 04
Size, and the nuclear magnetic signal intensity corresponding to each coordinate is drawn, obtain point of the corresponding nuclear magnetic signal intensity of test space each point
Butut, to know that magnetostatic field each point is distributed the contribution to nuclear magnetic signal.
In addition, in embodiments of the present invention, in order to all devices of Collaborative Control present system, on the CPU
Synchronization Design multiple interfaces, including：Step motor control interface, space coordinate locating interface, radiofrequency signal control interface, core
Magnetic signal acquisition interface, nuclear magnetic signal analysis result output interface and display output interface.Compared with conventional single host computer,
The present invention is added to various control interface, so as to the input and output with middle information.
Preferably, the both ends of miniature coils 04 are connected with the input terminal of signal amplifier 05, the output of signal amplifier 05
End is connected with CPU 06.As shown in Figure 3.
Preferably, which further includes：Three dimensional coordinate space positioning device 07；Three dimensional coordinate space positioning device 07 is used for
It adjusts and positions solid space coordinate of the miniature coils 04 in the test space.
Preferably, three dimensional coordinate space positioning device 07 includes：Stepper motor 071 and three-dimensional coordinate control device 072.
Stepper motor 071, for driving miniature coils rotation to adjust the position of miniature coils in the form of stepping.Its
In, miniature coils 04 are connected with the stepping axis of stepper motor 071.
In embodiments of the present invention, after miniature coils 04 being wrapped minute sample container 02, miniature coils 04 are consolidated
Due on the stepping axis of stepper motor 07, and miniature coils 04 and minute sample container 02 are placed in what magnet 08 generated together
On one location point of the electrostatic field test space.
Preferably, stepper motor 071 is nonferromugnetic material；The stepping accuracy of stepper motor 071 is mm grades, the precision
Rank can accurately control stepper motor and step to the location point for needing to carry out static magnetic field measurements.
Three-dimensional coordinate control device 072, the stepping rate for controlling stepper motor 071 and stepping accuracy, and determination is micro-
Type coil 04 carries out the solid space coordinate after the adjustment of position.
Stepper motor 071 is connected with three-dimensional coordinate control device 072；06 phases of three-dimensional coordinate control device 072 and CPU
Even.
In embodiments of the present invention, the control of stepper motor is completed by three-dimensional coordinate control device 072, and three-dimensional
The instruction that coordinate control device 072 starts to implement stepper motor 071 control is to be sent to three-dimensional coordinate control dress by CPU 06
Set to 0 72.
Preferably, 06 CPU, the position for being additionally operable to send out miniature coils 04 to three-dimensional coordinate control device 072 adjust letter
Number, and acquire the solid space coordinate of the miniature coils 04 of the return of three-dimensional coordinate control device 072.
In embodiments of the present invention, it is based on three-dimensional coordinate control device 072, CPU 06 is sending control instruction, i.e., micro-
After the position adjustment signal of type coil 04, the coordinate information of miniature coils 04, base can be also acquired from three-dimensional coordinate control device 072
In the coordinate information, in conjunction with each nuclear magnetic signal obtained in the slave test space that the above CPU 06 is recorded, just
The distribution map of the corresponding nuclear magnetic signal intensity of complete test space each point can be drawn out.
Preferably, which further includes：Three-dimensional fix workbench 09.
Three-dimensional fix workbench 09 for fixed signal amplifier and places magnet.
In embodiments of the present invention, for the ease of test operation, it has been also prepared for three-dimensional fix workbench 09, has been used for
Say that other various operating devices, such as signal amplifier, magnet are all fixed on the three-dimensional fix workbench 09.
The complete operation of the magnetostatic field nuclear-magnetism effect analysis system 01 of the present invention is described in detail below.
1), sample is installed, will be packed into the copper-bath of 100ms or so in minute sample container 02, blend compounds plug by its
Opening is blocked to reach sealing, ensures that sample solution will not flow out.
2), the minute sample container 02 for filling copper-bath sample is built in miniature coils 04, therefore, it is desirable to will
The inner wall of miniature coils 04 is close to the outer wall of minute sample container 02, to improve fill factor.
3) miniature coils 04 are connected with signal amplifier 05, and signal amplifier 05 is fixed on three-dimensional fix
On the holder of workbench 09.
4), the miniature coils 04 equipped with minute sample container 02 are fixed on the stepping axis of stepper motor 071.
5), magnet 08 to be measured is positioned on the platform of three-dimensional fix workbench 09.
6), the miniature coils 04 equipped with minute sample container 02 are placed in the magnetostatic field B0 that magnet 08 generates, are made miniature
Copper-bath polarization in sample container 02.
7), CPU 06 sends out command signal to radio-frequency pulse emitter 03, and radio-frequency pulse emitter 03 is according to the life
Signal is enabled to generate radio-frequency pulse by spin-echo sequence to encourage copper-bath to generate nuclear magnetic resonance.
8), after copper-bath sample motivates nuclear magnetic signal, by signal amplifier 05 by miniature coils 04 to this
Nuclear magnetic signal is acquired and amplifies.
9), CPU 06 acquires amplified nuclear magnetic signal, is analyzed the nuclear magnetic signal, is handled, determines nuclear magnetic signal
Intensity and show；CPU 06 is obtained by three-dimensional coordinate control device 072 and is mounted on stepper motor 071 simultaneously
The solid space coordinate of miniature coils 04 is simultaneously shown.
10), CPU 06 sends the evolution information of miniature coils 04 to three-dimensional coordinate control device 072, and control is miniature
Adjustment position coordinates of the coil 04 in magnetostatic field B0, CPU 06 record the coordinate of the miniature coils 04 after the adjustment of position, and
Record the intensity of collected nuclear magnetic signal under changing coordinates.
11) step 7), is repeated to the nuclear magnetic signal intensity for 10), measuring each position point in space in magnetostatic field B0.
12), CPU 06 draws the test space according to the nuclear magnetic signal intensity of each position point in space in the magnetostatic field B0 of acquisition
The distribution map of the corresponding nuclear magnetic signal intensity of each point.
13) it, after secondary be measured, cuts off the power, radio-frequency pulse emitter 03 is closed, by miniature coils 04 and signal
Amplifier 05 disconnects, and the minute sample container 02 for filling copper-bath is made to be kept upright, and to prevent unexpected leakage current, simultaneously will
Three-dimensional fix workbench 09 restores to initial position, in case next time measures.
Through the above steps, the complete test process of magnetostatic field nuclear-magnetism effect analysis system 01 of the present invention is just completed.
Compared with prior art, the present invention includes：Minute sample container, for loading with predetermined longitudinal relaxation time
Containing hydrogen solution.Radio-frequency pulse emitter, the command signal sent out for receiving CPU, and pressed from cycle according to the command signal
Wave train generates radio-frequency pulse and contains hydrogen solution generation nuclear magnetic resonance to encourage.Miniature coils are used for transmission and core occur containing hydrogen solution
The nuclear magnetic signal generated after magnetic resonance.Signal amplifier, the nuclear magnetic signal for acquiring miniature coils transmission, and the nuclear-magnetism is believed
It number is amplified.CPU, the intensity for recording amplified nuclear magnetic signal, and draw the corresponding nuclear-magnetism letter of test space each point
The distribution map of number intensity.Scheme through the invention, the non-homogeneous magnetostatic field that can be generated to magnet are analyzed.Innovatively
It proposes directly to carry out nuclear-magnetism effect analysis to the non-homogeneous magnetostatic field of low field 0.5MHz-2MHz using nmr phenomena, it can
Remove gaussmeter mensuration from and is unable to measure influence for magnetostatic field inhomogeneities to nuclear magnetic resonance effects, it is directly existing by nuclear-magnetism
As measuring influence of each point magnetostatic field to nuclear magnetic signal in space.Nuclear magnetic resonance principle analysis magnetostatic field 2MHz or less is filled up simultaneously
Blank, and the nuclear magnetic resonance effects of non-homogeneous magnetostatic field can be analyzed.
It should be noted that embodiment described above be merely for convenience of it will be understood by those skilled in the art that, and
It is not used in and limits the scope of the invention, under the premise of not departing from the inventive concept of the present invention, those skilled in the art couple
Any obvious replacement and improvement that the present invention is made etc. are within protection scope of the present invention.
Claims (10)
1. a kind of magnetostatic field nuclear-magnetism effect analysis system, which is characterized in that the system device includes：Minute sample container, radio frequency
Impulse starter, miniature coils, signal amplifier and central processor CPU；
The minute sample container contains hydrogen solution for loading with predetermined longitudinal relaxation time；
The radio-frequency pulse emitter, the command signal sent out for receiving the CPU, and pressed certainly according to the command signal
It is described containing hydrogen solution generation nuclear magnetic resonance to encourage that cycle wave train generates radio-frequency pulse；
The miniature coils are used for transmission the nuclear magnetic signal for occurring to generate after nuclear magnetic resonance containing hydrogen solution；
The signal amplifier, the nuclear magnetic signal for acquiring the miniature coils transmission, and the nuclear magnetic signal is put
Greatly；
The CPU, the intensity for recording amplified nuclear magnetic signal, and it is strong to draw the corresponding nuclear magnetic signal of test space each point
The distribution map of degree；
The system also includes：Three dimensional coordinate space positioning device；The three dimensional coordinate space positioning device includes：Stepper motor
With three-dimensional coordinate control device；
The stepper motor, for driving the miniature coils rotation to adjust the position of the miniature coils in the form of stepping
It sets；
The three-dimensional coordinate control device, the stepping rate for controlling the stepper motor and stepping accuracy, and described in determination
Miniature coils carry out the solid space coordinate after the adjustment of position.
2. magnetostatic field nuclear-magnetism effect analysis system as described in claim 1, which is characterized in that during test, the miniature sample
Product container is positioned in the miniature coils, and the outer wall of the minute sample container and the inner wall of the miniature coils were
It is full of cooperation；
Wherein, the internal diameter of the miniature coils is millimeter mm magnitudes；The outer diameter of the minute sample container is less than or equal to 5mm.
3. magnetostatic field nuclear-magnetism effect analysis system as described in claim 1, which is characterized in that
The hydrogen solution that contains is copper-bath；
The predetermined longitudinal relaxation time is 100 milliseconds of ms；
The minute sample container uses polytetrafluoro material；
The miniature coils are internal loopback radio-frequency coil；
Signal magnitude handled by the signal amplifier is V grades of microvolt μ.
4. magnetostatic field nuclear-magnetism effect analysis system as described in claim 1, which is characterized in that the both ends of the miniature coils with
The input terminal of the signal amplifier is connected, and the output end of the signal amplifier is connected with the CPU.
5. magnetostatic field nuclear-magnetism effect analysis system as described in claim 1, which is characterized in that the three dimensional coordinate space positioning
Device is for adjusting and positioning solid space coordinate of the miniature coils in the test space.
6. magnetostatic field nuclear-magnetism effect analysis system as claimed in claim 5, which is characterized in that
The miniature coils are connected with the stepping axis of the stepper motor；The stepper motor and the three-dimensional coordinate control device
It is connected；The three-dimensional coordinate control device is connected with the CPU.
7. magnetostatic field nuclear-magnetism effect analysis system as claimed in claim 6, which is characterized in that the stepper motor is non-ferromagnetic
Property material；The stepping accuracy of the stepper motor is mm grades.
8. magnetostatic field nuclear-magnetism effect analysis system as claimed in claim 6, which is characterized in that
The CPU, the position for being additionally operable to send out the miniature coils to the three-dimensional coordinate control device adjusts signal, and acquires
The solid space coordinate for the miniature coils that the three-dimensional coordinate control device returns.
9. magnetostatic field nuclear-magnetism effect analysis system as claimed in claim 5, which is characterized in that the system also includes：Magnet；
The magnet, for generating magnetostatic field；The miniature coils are placed in the magnetostatic field.
10. magnetostatic field nuclear-magnetism effect analysis system as claimed in claim 9, which is characterized in that the system also includes：It is three-dimensional
Space orientation workbench；
The three-dimensional fix workbench, for fixing the signal amplifier and placing the magnet.
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