CN101865983A - Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling - Google Patents
Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling Download PDFInfo
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- CN101865983A CN101865983A CN200910049534A CN200910049534A CN101865983A CN 101865983 A CN101865983 A CN 101865983A CN 200910049534 A CN200910049534 A CN 200910049534A CN 200910049534 A CN200910049534 A CN 200910049534A CN 101865983 A CN101865983 A CN 101865983A
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- down signal
- ring down
- magnetic resonance
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Abstract
The invention discloses a nuclear magnetic resonance assembly for releasing a Ring Down signal by inductive coupling, which is applied in a nuclear magnetic resonance device. The invention is characterized in that the magnetic field zone of a nuclear magnetic resonance primary coil 1 is arranged in a coil 2 specially used for releasing the Ring Down signal; one end of the coil is earthed, the other end thereof is connected with a switch 3, and the other end of the switch is earthed. When the Ring Down signal needs to be released, the switch is switched off, and the two ends of the coil 2 are simultaneously earthed, thereby quickly conducting coupled energy into the ground and realizing releasing the Ring Down signal.
Description
Affiliated technical field
Technical field of the present invention is nuclear magnetic resonance (NMR) device, especially for the probe of NMR spectrometer.
Technical background
At present, the probe of nuclear magnetic resonance device is made up of coil and electric capacity, but because the coil stored magnetic energy, but electric capacity storage of electrical energy, so nuclear magnetic resonance device after carrying out radio-frequency (RF) excited, can carry out the exchange of energy between coil and the electric capacity, in coil, produce Ring Down signal thus.This signal meeting last very long, and more a lot of greatly than the intensity of NMR signal, so in a very long time, receiver all can't receive NMR signal effectively.
In disclosed patent 200320124687.6, introduced a kind of method of using the Ring Down signal in the power consumption resistance release coil, though this design is simple in structure, be convenient to implement, but can reduce radio-frequency (RF) excited efficient, release rate is limited, and resistance can introduce noise, influences the noiseproof feature of nmr receiver.
Summary of the invention
In order to solve existing nmr probe Ring Down signal duration of long problem, the invention provides a kind of assembly.This assembly not only can not reduce radio-frequency (RF) excited efficient, but also can guarantee the noiseproof feature of nmr receiver when reaching snap-out release Ring Down signal purpose.
The technical scheme that the present invention addresses the above problem is:
A kind of nuclear magnetic resonance assembly that utilizes inductive coupling to discharge Ring Down signal, it is by coil, and switch and control circuit are formed.Coil is in the field region of nuclear magnetic resonance equipment main coil, an end ground connection of this coil, and the other end links to each other with switch, and the other end of switch is ground connection then.
When nuclear magnetic resonance equipment is in radio-frequency (RF) excited and signal and receives the stage, switch disconnects, though Ring Down signal receiving coil can receive electromagnetic field signal by inductive coupling, but because switch disconnects, nuclear magnetic resonance equipment can't discharge the energy that receives, so this moment, can normally be worked.When being between the reception of radio-frequency (RF) excited and signal, switch closure, the two ends of this coil are ground connection all, promptly is discharged into undergroundly so it can be received Ring Down signal, shortens the nuclear magnetic resonance equipment Ring Down signal purpose of action time thereby reach.
The most important advantage of the present invention is to use inductive coupling to discharge Ring Down signal apace, and need not nuclear magnetic resonance equipment is significantly revised.And can reach the purpose of adjusting Ring Down signal release rate by adjusting the degree of coupling between main coil and the Ring Down signal receiving coil.
Description of drawings
By accompanying drawing the present invention is described in detail below,
In the accompanying drawing
Fig. 1 shows system construction drawing of the present invention.Wherein 1 is the main coil of nuclear magnetic resonance equipment, and 2 is Ring Down signal receiving coil, and 3 is coupling capacitance, and 4 is radio-frequency (RF) switch, and 5 is decoupling capacitor, and 6 is control port.
Fig. 2 shows the embodiments of the invention schematic diagram.1 circle of serving as theme wherein, 2 is Ring Down signal receiving coil, and 3 is coupling capacitance, and 4 is radio-frequency (RF) switch, and 5 is decoupling capacitor, and 6 is control port, and 7 is that nuclear magnetic resonance transceiver, 8 is sample hose.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further described.
As can see from Figure 1, include a Ring Down signal receiving coil 2 in the action of a magnetic field zone of the main coil on the nuclear magnetic resonance equipment 1.Coil 2 links to each other with radio-frequency switch circuit, comprises radio-frequency (RF) switch 4, decoupling capacitor 5 and control port 6 in the on-off circuit.When needs discharged Ring Down signal, control port received order, the radio-frequency (RF) switch closure, and at this moment, coil 2 receives the Ring Down signal in the malcoils, and discharges by on-off circuit by inductive coupling.And other the time, switch is in off-state.
Fig. 2 is one embodiment of the present of invention.As shown in the figure, main coil 1 and Ring Down signal receiving coil 2 are wrapped on the sample hose 8 in the same way, form certain degree of coupling thus between two coils.Main coil 1 links to each other with nuclear magnetic resonance transceiver 7, constitutes a complete NMR system.Coil 2 links to each other with radio-frequency switch circuit, is used to discharge Ring Down signal.
In the radio-frequency transmissions stage, nuclear magnetic resonance equipment is launched the radio-frequency pulse that meets Larmor frequency to main coil, and make radio-frequency (RF) switch be in off-state by control port this moment.Though this moment, Ring Down signal receiving coil can receive the energy of radio-frequency pulse by inductive coupling, because switch disconnects, can't the radio-frequency pulse energy importing of being coupled to is underground, thus do not influence the radio-frequency (RF) excited efficient of nuclear magnetic resonance equipment.Equally, receive the stage at signal, control port still makes switch disconnect, and the reception of NMR signal is also unaffected.And between radio-frequency (RF) excited and signal received, for the Ring Down signal in the release coil as early as possible, control port made switch closure, and this moment, coil 2 equivalences were two-terminal-grounding.Its Ring Down signal that receives by inductive coupling is directed to underground apace, shortens the probe Ring Down signal purpose of action time thereby played.
Claims (3)
1. nuclear magnetic resonance assembly that utilizes inductive coupling to discharge Ring Down signal.It is characterized in that: in the action of a magnetic field zone of the main coil [1] of nuclear magnetic resonance equipment, put to one and be specifically designed to the coil [2] that receives Ring Down signal.One end ground connection of this coil, the other end links to each other with switch [3], the other end ground connection of switch.
2. according to claims 1 described nuclear magnetic resonance assembly that utilizes inductive coupling to discharge Ring Down signal.It is characterized in that: produce coupling between nuclear magnetic resonance main coil and the Ring Down signal receiving coil, can reach the purpose of adjusting Ring Down signal release rate by adjusting the degree of coupling.
3. according to claims 1 described nuclear magnetic resonance assembly that utilizes inductive coupling to discharge Ring Down signal.It is characterized in that: receive the stage in radio-frequency transmissions stage and signal, switch disconnects, and the work of nuclear magnetic resonance equipment is unaffected; Discharge Ring Down signal phase, switch closure, Ring Down signal is imported into underground by switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910049534A CN101865983A (en) | 2009-04-17 | 2009-04-17 | Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910049534A CN101865983A (en) | 2009-04-17 | 2009-04-17 | Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101865983A true CN101865983A (en) | 2010-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910049534A Pending CN101865983A (en) | 2009-04-17 | 2009-04-17 | Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling |
Country Status (1)
| Country | Link |
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| CN (1) | CN101865983A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2662262Y (en) * | 2003-12-01 | 2004-12-08 | 中国科学院电工研究所 | Coil energy release circuit for single coil pulsed nuclear magnetic resonance system |
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2009
- 2009-04-17 CN CN200910049534A patent/CN101865983A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2662262Y (en) * | 2003-12-01 | 2004-12-08 | 中国科学院电工研究所 | Coil energy release circuit for single coil pulsed nuclear magnetic resonance system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Ren Chaohui Document name: Notification of Publication of the Application for Invention |
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| DD01 | Delivery of document by public notice |
Addressee: Ren Chaohui Document name: Notification of before Expiration of Request of Examination as to Substance |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101020 |