CN109085521A - Three-dimensional NMR imager high voltage relief compensation method and device - Google Patents
Three-dimensional NMR imager high voltage relief compensation method and device Download PDFInfo
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- CN109085521A CN109085521A CN201810567578.3A CN201810567578A CN109085521A CN 109085521 A CN109085521 A CN 109085521A CN 201810567578 A CN201810567578 A CN 201810567578A CN 109085521 A CN109085521 A CN 109085521A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
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Abstract
Three-dimensional NMR imager high voltage relief compensation method provided by the invention and dress center at least two antenna transmitting modules；Each antenna transmitting module is connected with three-dimensional NMR imager main body respectively, and successively emits NMR signal under the control of the three-dimensional NMR imager main body；Wherein, the antenna transmitting module includes antenna element, tuning capacitance group, vent unit and duplexer；The antenna element is connect by the duplexer with the three-dimensional NMR imager main body, for emitting the NMR signal；The tuning capacitance group is connected in parallel with the antenna element, for tuning the frequency of the NMR signal；The vent unit is connected in parallel with the antenna element, for dump energy of the antenna transmitting module after completing transmitting of releasing, to effectively reduce the echo sounding time of nuclear magnetic signal.
Description
Technical field
The present invention relates to electronic circuit technology more particularly to a kind of three-dimensional NMR imager high voltage relief compensation methodes
With device.
Background technique
Nuclear magnetic resonance (NuclearMagneticResonance, NMR) phenomenon is found in nineteen forty-six, is applied quickly later
In fields such as physics, chemistry, material science, life science and medicine.In the 1950s, nuclear magnetic resonance start it is natural in petroleum
It is applied in gas industry, is initially applied to reservoir rocks physical field.NMR imaging instrument can use nuclear magnetic resonance principle pair
The formation information of wellbore detect, qualitative recognition and quantitative assessment ability with unique reservoir fluid.
Wherein, antenna module is one of important component of NMR imaging instrument, and structure determines the measurement side of instrument
The key performances such as formula, nuclear magnetic resonance area and NMR signal intensity.In the prior art, when being wrapped in NMR imaging instrument
When having included multiple groups antenna module, in order to meet measurement demand, these antenna component will be spaced to schedule successively emits core
Magnetic resonance signal.
But due to the physical characteristic of antenna module, antenna module after completing to the transmitting of NMR signal,
Inside also remaining has certain dump energy, and antenna module needs that signal next time could be started after waiting dump energy to discharge
Transmitting.The echo sounding time that this also results in the nuclear magnetic signal in existing NMR imaging instrument is longer, is unfavorable for improving
Accuracy of measurement.
Summary of the invention
For it is above-mentioned refer to it is existing in the prior art due to complete to the transmitting of NMR signal after, day
Also remaining has certain dump energy inside line so that antenna need to start after waiting dump energy to discharge it is next
The transmitting of secondary signal, and then cause the echo sounding time of nuclear magnetic signal in existing NMR imaging instrument longer, it is unfavorable for
The problem of improving accuracy of measurement and measurement efficiency, the present invention provides a kind of compensation of three-dimensional NMR imager high voltage relief
Method and apparatus.
On the one hand, the present invention provides a kind of three-dimensional NMR imager high voltage relief compensation devices, comprising: at least two
A antenna transmitting module；
Each antenna transmitting module is connected with three-dimensional NMR imager main body respectively, and in the three-dimensional nuclear-magnetism
Successively emit NMR signal under the control of resonance imager main body；
Wherein, the antenna transmitting module includes antenna element, tuning capacitance group, vent unit and duplexer；Institute
It states antenna element and is connect by the duplexer with the three-dimensional NMR imager main body, it is total for emitting the nuclear-magnetism
Shake signal；The tuning capacitance group is connected in parallel with the antenna element, for tuning the frequency of the NMR signal；Institute
It states vent unit to be connected in parallel with the antenna element, for residual energy of the antenna transmitting module after completing transmitting of releasing
Amount.
In a kind of wherein optional embodiment, at least two antennas transmitting module is arranged in same level
On, and each antenna transmitting module is circumferentially uniformly distributed.
In a kind of wherein optional embodiment, the tuning capacitance group includes main tuning capacitor and at least one sub- tune
Humorous capacitance group；
Wherein, the main tuning capacitor is connected in parallel at least one described sub- tuning capacitance group, wherein the sub- tuning
Include in capacitance group sub- tuning capacitance and with the sub- concatenated tuning switch of tuning capacitance；The tuning switch is for controlling
The working condition of sub- tuning capacitance connected to it.
In a kind of wherein optional embodiment, the capacitance of the main tuning capacitor is greater than each sub- tuning capacitance
Capacitance.
In a kind of wherein optional embodiment, when the quantity of the sub- tuning capacitance group is two and two or more
When, the capacitance of each sub- tuning capacitance is not identical.
In a kind of wherein optional embodiment, the quantity of the duplexer in each antenna transmitting module is two
It is a；The both ends of the antenna element pass through a duplexer respectively and connect with the three-dimensional NMR imager main body.
In a kind of wherein optional embodiment, which is also wrapped
It includes: electronic short piece；
The electronic short piece is connect with the both ends of each antenna transmitting module respectively, also with the three-dimensional NMR at
As instrument main body connects.
In a kind of wherein optional embodiment, the vent unit includes: to release switch and at least two to release
Resistance；
Wherein, described to release switch and each bleeder resistance is connected in series, at least two bleeder resistance
Any two bleeder resistance indirectly.
On the other hand, the present invention provides one kind is mended based on any one aforementioned three-dimensional NMR imager high voltage relief
Repay the three-dimensional NMR imager high voltage relief compensation method of device, comprising:
Control the NMR signal that each antenna transmitting module successively emits predeterminated frequency；
Wherein, when one of antenna transmitting module emits NMR signal, other described antenna transmitting modules pair
The frequency for the NMR signal answered is not the predeterminated frequency；
After one of antenna transmitting module emits NMR signal, next antenna transmitting module emits nuclear-magnetism
Before resonance signal, the vent unit in one of antenna transmitting module is connected, so that one of antenna hair
The dump energy penetrated in module is released.
In a kind of wherein optional embodiment, it is connected in the vent unit in one of antenna transmitting module
Afterwards, before next antenna transmitting module transmitting NMR signal, further includes:
The duplexer conducting of other antenna transmitting modules is controlled, so that other described antenna transmitting modules assist institute
The vent unit stated in one of antenna transmitting module releases to dump energy；Wherein, other described antenna transmitting modules
The frequency of corresponding NMR signal is the predeterminated frequency.
Three-dimensional NMR imager high voltage relief compensation method provided by the invention and dress center at least two days
Line transmitting module；Each antenna transmitting module is connected with three-dimensional NMR imager main body respectively, and in the three-dimensional
Successively emit NMR signal under the control of NMR imaging instrument main body；Wherein, the antenna transmitting module includes antenna
Unit, tuning capacitance group, vent unit and duplexer；The antenna element passes through the duplexer and the spatial nuclei
Magnetic resonance imager main body connection, for emitting the NMR signal；The tuning capacitance group and the antenna element are simultaneously
Connection connection, for tuning the frequency of the NMR signal；The vent unit is connected in parallel with the antenna element, is used for
Release the antenna transmitting module complete transmitting after dump energy.And by being provided in each antenna transmitting module
The vent unit being connected in parallel with antenna element, so that the vent unit can be to residue of the antenna transmitting module after completing transmitting
Energy is quickly released, and the echo sounding time of nuclear magnetic signal is effectively reduced.
Detailed description of the invention
Fig. 1 is a kind of circuit for three-dimensional NMR imager high voltage relief compensation device that the embodiment of the present invention one provides
Structural schematic diagram；
Fig. 2 is the electricity for another three-dimensional NMR imager high voltage relief compensation device that the embodiment of the present invention one provides
Line structure schematic diagram；
Fig. 3 is a kind of process of three-dimensional NMR imager high voltage relief compensation method provided by Embodiment 2 of the present invention
Schematic diagram.
Appended drawing reference:
10- antenna transmitting module；11- antenna element；
12- tuning capacitance group；121- main tuning capacitor；
The sub- tuning capacitance of 122-；123- tuning switch；
13- vent unit；131- releases switch；
132- bleeder resistance；14- duplexer；
20- three-dimensional NMR imager main body.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The term used in the embodiment of the present application is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.The "an" of used singular, " described " and "the" are also intended to including most shapes in the embodiment of the present application
Formula, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that commodity or system including a series of elements not only include those elements, but also including not arranging clearly
Other element out, or further include for this commodity or the intrinsic element of system.The case where not limiting more
Under, the element that is limited by sentence "including a ...", it is not excluded that also deposited in the commodity or system for including the element
In other identical element.
Before being illustrated to technical solution provided by the invention, the prior art according to the present invention is carried out first
It explains:
Nuclear magnetic resonance (NuclearMagneticResonance, NMR) phenomenon is found in nineteen forty-six, is applied quickly later
In fields such as physics, chemistry, material science, life science and medicine.In the 1950s, nuclear magnetic resonance start it is natural in petroleum
It is applied in gas industry, is initially applied to reservoir rocks physical field.NMR imaging instrument can use nuclear magnetic resonance principle pair
The formation information of wellbore detect, qualitative recognition and quantitative assessment ability with unique reservoir fluid.
Wherein, antenna module is one of important component of NMR imaging instrument, and structure determines the measurement side of instrument
The key performances such as formula, nuclear magnetic resonance area and NMR signal intensity.In the prior art, when being wrapped in NMR imaging instrument
When having included multiple groups antenna module, in order to meet measurement demand, these antenna component will be spaced to schedule successively emits core
Magnetic resonance signal.
But due to the physical characteristic of antenna module, antenna module after completing to the transmitting of NMR signal,
Inside also remaining has certain dump energy, and antenna module needs that signal next time could be started after waiting dump energy to discharge
Transmitting.The echo sounding time that this also results in the nuclear magnetic signal in existing NMR imaging instrument is longer, is unfavorable for improving
Accuracy of measurement.
Fig. 1 is a kind of circuit for three-dimensional NMR imager high voltage relief compensation device that the embodiment of the present invention one provides
Structural schematic diagram.
As shown in Figure 1, the three-dimensional NMR imager high voltage relief compensation device, may include:
At least two antenna transmitting modules 10；
Each antenna transmitting module 10 is connected with three-dimensional NMR imager main body 20 respectively, and in the three-dimensional
Successively emit NMR signal under the control of NMR imaging instrument main body 20；
Wherein, the antenna transmitting module 10 includes antenna element 11, tuning capacitance group 12, vent unit 13 and antenna
Switch 14；The antenna element 11 is connect by the duplexer 14 with the three-dimensional NMR imager main body 20, is used
In the transmitting NMR signal；The tuning capacitance group 12 is connected in parallel with the antenna element 11, described for tuning
The frequency of NMR signal；The vent unit 13 is connected in parallel with the antenna element 11, for the antenna hair of releasing
Penetrate dump energy of the module 10 after completing transmitting.
In the present embodiment one, antenna transmitting module 10 specifically can be by having the electronics core of NMR signal transmission-receiving function
The composition such as piece, microcircuit, integrated circuit, wherein the quantity of antenna transmitting module 10 is two and two or more, wherein antenna
Duplexer 14 in transmitting unit can be a plurality of types of switches, as diode switch, semiconductor field effect transistor switch
Deng；Tuning capacitance group 12 in antenna transmitting unit can be specifically made of the capacitor of multiple parallel connections, can also be by a variable capacitance
The capacitor of value forms；Vent unit 13 in antenna transmitting unit can be specifically made of a variety of components, such as capacitor, switch, electricity
Resistance etc., the vent unit 13 can be used for after antenna transmitting module 10 completes transmitting realizing letting out to the dump energy in it
It puts；Three-dimensional NMR imager main body 20 specifically can refer to remove the portion other than above structure in three-dimensional NMR imager
Point comprising but be not limited to controller, processor, imaging device etc..
Specifically, in each antenna transmitting module 10 both ends of antenna element 11 respectively with three NMR imaging instruments
Main body connection, and it is also connected with duplexer 14 between each antenna element 11 and three-dimensional NMR imager main body 20, with
The working condition of each antenna transmitting module 10 is controlled by duplexer 14 for three-dimensional NMR imager main body 20.Meanwhile
Tuning capacitance group 12 is connected in the both ends of antenna element 11 in parallel, can be used for the NMR signal emitted antenna element 11
Tranmitting frequency be tuned.In general, each antenna transmitting module 10 is successively sent out according to preset order and time interval
Penetrate NMR signal.And after any antenna transmitting module 10 is completed to the transmitting of NMR signal, next antenna
Before transmitting module 10 starts to emit NMR signal, vent unit 13 is started to work and is sent out the current antenna for completing transmitting
Dump energy in module 10 is penetrated to release.
In the present embodiment, the hair to NMR signal is completed in order to solve antenna transmitting module 10 in the prior art
After penetrating, antenna transmitting module 10 could start signal transmitting next time after needing to wait the dump energy in it to discharge, from
And cause the echo sounding time of nuclear magnetic signal longer, it is unfavorable for the problem of improving accuracy of measurement, the antenna hair of the present embodiment
It penetrates in module 10 in such a way that tuning capacitance group 12, antenna element 11 and vent unit 13 three are in parallel so that using letting out
Unit 13 is put to release the dump energy of antenna transmitting module 10.
Preferably, in a kind of wherein optional embodiment, each day transmitting module is arranged in same level, so that
It can be measured in same bottom depth.In addition, circumferentially equally distributed set-up mode can be used in each antenna transmitting module 10,
For example, if the quantity of antenna transmitting module 10 is 3, the angle between every two antenna transmitting module 10 can be
120 degree；If the quantity of antenna transmitting module 10 is 6, the angle between every two antenna transmitting module 10 can be 60 degree；
If the quantity of antenna transmitting module 10 be it is N number of, the angle between every two antenna transmitting module 10 can be 360/N degree.
Preferably, in a kind of wherein optional embodiment, duplexer 14 in each antenna transmitting module 10
Quantity is two, and the both ends of antenna element 11 pass through a duplexer 14 and the three-dimensional NMR imager main body respectively
20 connections.
In other words, in the present embodiment, each antenna element 11 will be correspondingly connected with there are two duplexer 14, this two
The switch state needs of a duplexer 14 are consistent so that antenna element 11 can emission state and non-emitting states it
Between switch over.
Preferably, in a kind of wherein optional embodiment, three-dimensional NMR imager high voltage relief compensation dress
It sets further include: electronic short piece；The electronic short piece connects with the both ends of the antenna element 11 of each antenna transmitting module 10 respectively
It connects, is also connect with the three-dimensional NMR imager main body 20.
In other words, in the present embodiment, it is additionally provided with electronic short piece structure, to antenna transmitting module 10 and three-dimensional
NMR imaging instrument main body 20 is effectively connected and is fixed, and ensure that antenna transmitting module 10 and three-dimensional NMR are imaged
Transmission connectivity of the instrument main body 20 in data-signal level also ensures that antenna transmitting module 10 and three-dimensional NMR are imaged
Stability of the instrument main body 20 in connection structure.
Preferably, in a kind of wherein optional embodiment, the duplexer 14 is relay switch, using relay
Device switch can provide safeguard for the safety of entire antenna circuit and controllability.
On the basis of Fig. 1, the three-dimensional NMR imager high voltage relief provided in order to further illustrate the present invention is mended
Device is repaid, Fig. 2 is the electricity for another three-dimensional NMR imager high voltage relief compensation device that the embodiment of the present invention one provides
Line structure schematic diagram.
As shown in Fig. 2, similarly with Fig. 1 embodiment, the three-dimensional NMR imager high voltage relief compensation device
In include:
At least two antenna transmitting modules 10；
Each antenna transmitting module 10 is connected with three-dimensional NMR imager main body 20 respectively, and in the three-dimensional
Successively emit NMR signal under the control of NMR imaging instrument main body 20；
Wherein, the antenna transmitting module 10 includes antenna element 11, tuning capacitance group 12, vent unit 13 and antenna
Switch 14；The antenna element 11 is connect by the duplexer 14 with the three-dimensional NMR imager main body 20, is used
In the transmitting NMR signal；The tuning capacitance group 12 is connected in parallel with the antenna element 11, described for tuning
The frequency of NMR signal；The vent unit 13 is connected in parallel with the antenna element 11, for the antenna hair of releasing
Penetrate dump energy of the module 10 after completing transmitting.
Unlike Fig. 1 embodiment, in the present embodiment, the tuning capacitance group 12 includes main tuning capacitor
121 and 122 group 12 of at least one sub- tuning capacitance；Wherein, the main tuning capacitor 121 and at least one described sub- tuning capacitance
Be connected in parallel for 122 group 12, wherein include in 122 group 12 of the sub- tuning capacitance tuning capacitance 122 and with the sub- tuning
The concatenated tuning switch 123 of capacitor 122；The tuning switch 123 is used to control the work of sub- tuning capacitance 122 connected to it
State.
And vent unit 13 includes release switch 131 and at least two bleeder resistances 132；Wherein, the switch of releasing
131 and each bleeder resistance 132 be connected in series, any two bleeder resistance at least two bleeder resistance 132
132 indirectly.The quantity of switch 131 of wherein releasing can be for two, this two switches 131 of releasing are separately positioned on above-mentioned
The two sides for the grounding point anticipated between two bleeder resistances 132.
It should be noted that in the present embodiment, due to using the structure of mutiple antennas transmitting module 10, in order to keep away
Exempt from the nuclear magnetic resonance coupling phenomenon between each antenna transmitting module 10, when one of antenna transmitting module 10 is in emission state
When, the working condition of the sub- tuning capacitance 122 by adjusting other antenna transmitting modules 10 is needed, so as to reduce other antennas hair
Influence of the module 10 to the antenna transmitting module 10 of current transmitting NMR signal is penetrated, guarantees the nuclear magnetic resonance currently emitted
The stability and consistency of the tranmitting frequency of signal.In addition, in the present embodiment, due to can be to the switch of tuning switch 123
The control of state is, it can be achieved that change the corresponding tuning capacitance value of antenna element 11, and then change the core that antenna element 11 is emitted
Therefore the tranmitting frequency of magnetic resonance signal can also be achieved the transmitting of the NMR signal of multi-frequency using this characteristic.
It is, of course, preferable to, the capacitance of above-mentioned main tuning capacitor 121 is greater than the capacitor of each sub- tuning capacitance 122
Value, to guarantee the stability of the tranmitting frequency of entire NMR signal.Furthermore it is preferred that, when the sub- tuning capacitance 122
When the quantity of group 12 is two and is more than two, the capacitance of each sub- tuning capacitance 122 is not identical, so that transmitting frequency
Rate has more diverse selection.
Above-mentioned vent unit 13 is then in series by least two bleeder resistances 132 and switch 131 of releasing, therein
The resistance value of each bleeder resistance 132 can be selected according to the actual situation, and 100 ohm or more of resistance such as may be selected.In addition, letting out
Put unit 13 any two release switch 131 indirectly, and when the switch state for switch 131 of releasing be conducting when, antenna
The Q value of unit 11 reduces rapidly, at this point, the dump energy in antenna element 11 will quickly be released away by ground.
In order to which the work of three-dimensional NMR imager high voltage relief compensation device provided in this embodiment is explained further
Principle, by taking three-dimensional NMR imager high voltage relief compensation device shown in Fig. 2 as an example:
Firstly, the controllable duplexer 14 with first antenna transmitting module 10 is closed, control and second antenna
It duplexer 14 in transmitting module 10 and is disconnected with the duplexer 14 in third antenna transmitting module 10, and controls the
One antenna transmitting module 10 starts to emit NMR signal.At this point, in order to reduce the core between each antenna transmitting module 10
Magnetic resonance coupling effect guarantees the stability of NMR signal frequency that first antenna transmitting module 10 is emitted and accurate
Property, it can be by controlling the corresponding tuning capacitance value of each tuning capacitance group 12, so that second antenna transmitting module 10 and third
Tuning capacitance value corresponding to antenna transmitting module 10 and the tuning capacitance value of first antenna transmitting module 10 are unequal.
Then, after the transmitting that first antenna transmitting module 10 completes NMR signal, first antenna is sent out
The closure of switch 131 of releasing in module 10 is penetrated, it is surplus in first antenna transmitting module 10 so that vent unit 13 starts to release
Complementary energy.Preferably, can also while vent unit 13 starts to release the dump energy in first antenna transmitting module 10,
It is closed duplexer 14 in second antenna transmitting module 10 and third antenna transmitting module 10, and tunes its tuning capacitance
Group 12 is so that second antenna transmitting module 10 and the corresponding tuning capacitance value of third antenna transmitting module 10 and first
The corresponding tuning capacitance value of antenna transmitting module 10 is equal；In other words, in the residue of first antenna transmitting module 10 of releasing
During energy, in order to complete the process of releasing faster, in the vent unit using first antenna transmitting module 10 itself
On the basis of 13, also using the coupling phenomenon of the NMR signal between each antenna transmitting module 10, first day is assisted
Line transmitting module 10 is quickly released energy, and the speed for energy of releasing is effectively increased.
After again, similar step can be used, the signal transmitting and energy for successively controlling second antenna transmitting module 10 are let out
It puts and the transmitting of the signal of third antenna transmitting module 10 is released with energy.That is, adopting can have in manner just described
The echo sounding time of the reduction nuclear magnetic signal of effect.
In addition, on the basis of aforesaid way, when the signal transmitting and energy for being sequentially completed first antenna transmitting module 10
Amount is released, and the signal transmitting of second antenna transmitting module 10 is released with energy and the signal of third antenna transmitting module 10
Transmitting and after energy releases, can adjust the tuning capacitance group 12 in first antenna transmitting module 10 again so that this first
A antenna transmitting module 10 can emit the NMR signal of other tranmitting frequencies.That is, the three of present embodiment offer
Dimension NMR imaging instrument high voltage relief compensation device can be realized the transmitting of the NMR signal under multiple frequencies, further
The measurement efficiency in measurement process is improved, user's use is also convenient for.
It is arranged at least two in the three-dimensional NMR imager high voltage relief compensation device that the embodiment of the present invention one provides
Antenna transmitting module；Each antenna transmitting module is connected with three-dimensional NMR imager main body respectively, and described three
It ties up and successively emits NMR signal under the control of NMR imaging instrument main body；Wherein, the antenna transmitting module includes day
Line unit, tuning capacitance group, vent unit and duplexer；The antenna element passes through the duplexer and the three-dimensional
NMR imaging instrument main body connection, for emitting the NMR signal；The tuning capacitance group and the antenna element
It is connected in parallel, for tuning the frequency of the NMR signal；The vent unit is connected in parallel with the antenna element, is used
In dump energy of the antenna transmitting module after completing transmitting of releasing.And by being respectively provided in each antenna transmitting module
There is the vent unit being connected in parallel with antenna element, so that the vent unit can be surplus after completing transmitting to antenna transmitting module
Complementary energy is quickly released, and the echo sounding time of nuclear magnetic signal is effectively reduced.
Second embodiment of the present invention provides a kind of three-dimensional NMR imager high voltage relief compensation methodes, need to illustrate
It is that three-dimensional NMR imager high voltage relief compensation method provided by Embodiment 2 of the present invention can be used in above-mentioned Fig. 1 or Fig. 2
The three-dimensional NMR imager high voltage relief compensation device.
The three-dimensional NMR imager high voltage relief compensation method, comprising:
Control the NMR signal that each antenna transmitting module successively emits predeterminated frequency；Wherein, when one of them
When antenna transmitting module emits NMR signal, the frequency of the corresponding NMR signal of other described antenna transmitting modules is not
For the predeterminated frequency；After one of antenna transmitting module emits NMR signal, next antenna transmitting module
Before emitting NMR signal, vent unit in one of antenna transmitting module conducting, so that described wherein one
Dump energy in a antenna transmitting module is released.
In a kind of wherein optional embodiment, it is connected in the vent unit in one of antenna transmitting module
Afterwards, before next antenna transmitting module transmitting NMR signal, further includes: control the day of other antenna transmitting modules
Wiretap conducting.
Fig. 3 is a kind of process of three-dimensional NMR imager high voltage relief compensation method provided by Embodiment 2 of the present invention
Schematic diagram, shown in Fig. 3, this method comprises:
Step 101 chooses any antenna transmitting module as current antenna transmitting module；
Step 102, the control corresponding duplexer of current antenna transmitting module are so that the current antenna transmitting module emits
The NMR signal of predeterminated frequency；Wherein, other corresponding nuclear-magnetisms of antenna transmitting module other than the antenna transmitting module are total
The frequency and predeterminated frequency of vibration signal are unequal；
It is surplus in step 103, the vent unit for controlling the current antenna transmitting module and current antenna transmitting module of releasing
Complementary energy.
Step 104, the NMR signal for judging whether to complete to whole antenna transmitting modules under the predeterminated frequency are sent out
It penetrates；
If so, terminating；If it is not, thening follow the steps 105.
Step 105 chooses next antenna transmitting module as current antenna transmitting module, and return step 102.
In addition, may also include that other antennas transmitting mould other than tuning current antenna transmitting module after step 103
The tuning capacitance value of block is simultaneously closed corresponding duplexer, so that other corresponding NMR signals of antenna transmitting module
Frequency is equal with predeterminated frequency.At this point, other described antenna transmitting modules will be above-mentioned wherein using resonance coupling effect auxiliary
Vent unit in one antenna transmitting module releases to dump energy.That is, in the present invention, when any antenna is sent out
When penetrating module and being in launching phase, the frequency of other corresponding NMR signals of antenna transmitting module with should be in launching phase
Antenna transmitting module have differences, this makes launching phase that the coupling effect between mutiple antennas transmitting module will not occur；
And after any antenna transmitting module battery has fired, before the transmitting of next antenna transmitting module, need to any day
Remaining dump energy is released in line transmitting module, at this point, while being released using vent unit, it is also available
The generation that coupling effect between each antenna transmitting module accelerates dump energy to release, can control other antennas in this stage
The duplexer of transmitting module is connected, so that the frequency of the NMR signal of other antenna transmitting modules and any day
The predeterminated frequency of line transmitting module is consistent, and carries out the effect that auxiliary is released using coupling effect to realize.In addition, complete
Whole antenna transmitting module can also adjust each tuning electricity after the NMR signal transmitting under the predeterminated frequency again in pairs
The tuning capacitance value of appearance group, so that the predeterminated frequency of the corresponding NMR signal of each tuning capacitance group changes；Return to step
Rapid 101.
It should be noted that the principle of above-mentioned three-dimensional NMR imager high voltage relief compensation method and based on structure
Reference can be made to corresponding portion the present embodiment two of embodiment one no longer repeats this.
Three-dimensional NMR imager high voltage relief compensation method provided by Embodiment 2 of the present invention is arranged at least two days
Line transmitting module；Each antenna transmitting module is connected with three-dimensional NMR imager main body respectively, and in the three-dimensional
Successively emit NMR signal under the control of NMR imaging instrument main body；Wherein, the antenna transmitting module includes antenna
Unit, tuning capacitance group, vent unit and duplexer；The antenna element passes through the duplexer and the spatial nuclei
Magnetic resonance imager main body connection, for emitting the NMR signal；The tuning capacitance group and the antenna element are simultaneously
Connection connection, for tuning the frequency of the NMR signal；The vent unit is connected in parallel with the antenna element, is used for
Release the antenna transmitting module complete transmitting after dump energy.And by being provided in each antenna transmitting module
The vent unit being connected in parallel with antenna element, so that the vent unit can be to residue of the antenna transmitting module after completing transmitting
Energy is quickly released, and the echo sounding time of nuclear magnetic signal is effectively reduced.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of three-dimensional NMR imager high voltage relief compensation device characterized by comprising the transmitting of at least two antennas
Module；
Each antenna transmitting module is connected with three-dimensional NMR imager main body respectively, and in the three-dimensional NMR
Successively emit NMR signal under the control of imager main body；
Wherein, the antenna transmitting module includes antenna element, tuning capacitance group, vent unit and duplexer；The day
Line unit is connect by the duplexer with the three-dimensional NMR imager main body, for emitting the nuclear magnetic resonance letter
Number；The tuning capacitance group is connected in parallel with the antenna element, for tuning the frequency of the NMR signal；It is described to let out
It puts unit to be connected in parallel with the antenna element, for dump energy of the antenna transmitting module after completing transmitting of releasing.
2. three-dimensional NMR imager high voltage relief compensation device according to claim 1, which is characterized in that it is described extremely
Few two antenna transmitting modules are arranged in same level, and each antenna transmitting module is circumferentially uniformly distributed.
3. three-dimensional NMR imager high voltage relief compensation device according to claim 1, which is characterized in that the tune
Humorous capacitance group includes main tuning capacitor and at least one sub- tuning capacitance group；
Wherein, the main tuning capacitor is connected in parallel at least one described sub- tuning capacitance group, wherein the sub- tuning capacitance
Include in group sub- tuning capacitance and with the sub- concatenated tuning switch of tuning capacitance；The tuning switch is for control and its
The working condition of the sub- tuning capacitance of connection.
4. three-dimensional NMR imager high voltage relief compensation device according to claim 3, which is characterized in that the master
The capacitance of tuning capacitance is greater than the capacitance of each sub- tuning capacitance.
5. three-dimensional NMR imager high voltage relief compensation device according to claim 4, which is characterized in that
When the quantity of the sub- tuning capacitance group is two and is more than two, the capacitance of each sub- tuning capacitance not phase
Together.
6. three-dimensional NMR imager high voltage relief compensation device according to claim 1, which is characterized in that Mei Gesuo
The quantity for stating the duplexer in antenna transmitting module is two；The both ends of the antenna element pass through a duplexer respectively
It is connect with the three-dimensional NMR imager main body.
7. described in any item three-dimensional NMR imager high voltage relief compensation devices according to claim 1, which is characterized in that
Further include: electronic short piece；
The electronic short piece is connect with the both ends of each antenna transmitting module respectively, also with the three-dimensional NMR imager
Main body connection.
8. three-dimensional NMR imager high voltage relief compensation device according to claim 1, which is characterized in that described to let out
Putting unit includes: release switch and at least two bleeder resistances；
Wherein, release switch and each bleeder resistance series connection, it is any at least two bleeder resistance
Two bleeder resistances indirectly.
9. a kind of spatial nuclei based on any one of the claim 1-8 three-dimensional NMR imager high voltage relief compensation device
Magnetic resonance imager high voltage relief compensation method characterized by comprising
Control the NMR signal that each antenna transmitting module successively emits predeterminated frequency；
Wherein, when one of antenna transmitting module emits NMR signal, other described antenna transmitting modules are corresponding
The frequency of NMR signal is not the predeterminated frequency；
After one of antenna transmitting module emits NMR signal, next antenna transmitting module emits nuclear magnetic resonance
Before signal, the vent unit in one of antenna transmitting module is connected, so that one of antenna emits mould
Dump energy in block is released.
10. three-dimensional NMR imager high voltage relief compensation method according to claim 9, which is characterized in that described
After vent unit conducting in one of antenna transmitting module, next antenna transmitting module transmitting NMR signal it
Before, further includes:
Control the duplexer conducting of other antenna transmitting modules so that other described antenna transmitting modules auxiliary it is described its
In vent unit in an antenna transmitting module release to dump energy；Wherein, other described antenna transmitting modules are corresponding
NMR signal frequency be the predeterminated frequency.
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