CN106646294A - Nuclear magnetic resonance spectrometer probe - Google Patents
Nuclear magnetic resonance spectrometer probe Download PDFInfo
- Publication number
- CN106646294A CN106646294A CN201510735680.6A CN201510735680A CN106646294A CN 106646294 A CN106646294 A CN 106646294A CN 201510735680 A CN201510735680 A CN 201510735680A CN 106646294 A CN106646294 A CN 106646294A
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- China
- Prior art keywords
- microprocessor
- probe
- magnetic resonance
- nuclear magnetic
- radio
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
-
- 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
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
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- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention provides a nuclear magnetic resonance spectrometer probe, which has high-precise sensitive performance compared with other types of probes. The nuclear magnetic resonance spectrometer probe includes a power supply, a PC, a microprocessor, a detector, a pre-amplification circuit, an emitter, a receiver, a radio frequency power amplifier, a radio frequency oscillator, a Larmor frequency device, a switch and a probe. The structural features are that the output end of the microprocessor is connected with the Larmor frequency device, the emitter, the radio frequency power amplifier and the switch in sequence, the output end of the microprocessor is connected with the detector, the pre-amplification circuit, the receiver and the switch in sequence, the PC and the radio frequency oscillator are connected with the microprocessor, and the power supply provides electric energy for the microprocessor, the detector, the pre-amplification circuit, the emitter, the receiver, the radio frequency power amplifier, the radio frequency oscillator and the Larmor frequency device; and the switch is connected with the probe.
Description
Technical field
The invention belongs to atomic nucleus technical field of magnetism, more particularly to a kind of nuclear magnetic resonance instrument probe.
Background technology
Nuclear magnetic resonance is a subject for studying atom nuclear magnetism, just predicting some atomic nucleus from the hyperfine structure of extranuclear electron early in Pauli in 1924 should have spin angular momentaum and magnetic moment, and in the presence of external magnetic field, magnetic moment and magnetic field interaction, divide nuclear energy level, therefore in the presence of appropriate radiofrequency field there is RESONANCE ABSORPTION phenomenon in atomic energy.Radiofrequency field both can be applied continuously in, it is also possible to which the form of short pulse applies, and modern nuclear magnetic resonance technique all adopts pulse method.
Can be divided into High-Field, midfield, three kinds of low field by the different nuclear magnetic resonance techniques of magnetostatic field field intensity.High-Field, midfield nuclear magnetic resonance technique are relatively early due to application, theory and technology means all comparative maturities, are all widely used in many aspects such as chemistry, biomedicines.Low field pulse nuclear magnetic resonance technique is generally used for the exploration of the materials such as the underground water in terms of food chemistry industry, geology, natural gas, oil and the piping of dykes and dams detection etc., its applied environment is generally relatively more severe, the Signal-to-Noise of acquisition is extremely low, higher to the design requirement of Circuits and Systems.Especially to being related to the design of the critical component probe of the performance such as the degree of accuracy, sensitivity of whole system, it is proposed that more accurate requirement.
Comparatively, the probe of low field pulse NMR separates with the other parts of instrument, in order that instrument is operated on different applying frequencies, or in order that with the sample of different size and geometry, we generally require to make various probes, and carry out the experiment of different coils.
The content of the invention
The present invention is aiming at the problems referred to above, makes up the deficiencies in the prior art, there is provided a kind of nuclear magnetic resonance instrument probe；It is of the invention that there is the sensitive performance of high accuracy compared with other kinds of probe.
To realize the above-mentioned purpose of the present invention, the present invention is adopted the following technical scheme that.
A kind of nuclear magnetic resonance instrument probe of the present invention, including power supply, PC, microprocessor, wave detector, pre-amplification circuit, transmitter, receiver, radio-frequency power amplifier, radio-frequency oscillator, Larmor frequency device, switch, probe；Its structural feature is：The output end of the microprocessor is sequentially connected Larmor frequency device, transmitter, radio-frequency power amplifier, switch, the output end of the microprocessor is sequentially connected wave detector, pre-amplification circuit, receiver, switch, the PC, radio-frequency oscillator are connected with microprocessor, and the power supply provides electric energy to microprocessor, wave detector, pre-amplification circuit, transmitter, receiver, radio-frequency power amplifier, radio-frequency oscillator, Larmor frequency device respectively；The switch is connected with probe.
Used as a preferred embodiment of the present invention, the probe is made up of inductance L and electric capacity C1, tunable capacitor C2, and the electric capacity C1 and tunable capacitor C2 are connected in parallel, then in parallel with inductance L.
Used as another kind of preferred version of the present invention, the microprocessor adopts MSP430 series monolithics.
The invention has the beneficial effects as follows.
1st, a kind of nuclear magnetic resonance instrument probe that the present invention is provided, compared with other kinds of probe, using the probe of solenoid coil high Q (quality factor) values and good magnetic field homogeneity can be obtained；1. there can be good magnetic field homogeneity；2. higher sensitivity and larger size can be obtained, is spaced uniform between coil, thus have preferable magnetic field homogeneity；Simple structure, can be applicable to reduced size sample；With the sensitive performance of high accuracy.
Description of the drawings
Fig. 1 is a kind of circuit connection structure block diagram of nuclear magnetic resonance instrument probe of the invention.
Fig. 2 is a kind of probe circuit connection figure of nuclear magnetic resonance instrument probe of the invention.
Specific embodiment
Referring to shown in accompanying drawing 1, a kind of nuclear magnetic resonance instrument probe of the invention, including power supply, PC, microprocessor, wave detector, pre-amplification circuit, transmitter, receiver, radio-frequency power amplifier, radio-frequency oscillator, Larmor frequency device, switch, probe；Its structural feature is：The output end of the microprocessor is sequentially connected Larmor frequency device, transmitter, radio-frequency power amplifier, switch, the output end of the microprocessor is sequentially connected wave detector, pre-amplification circuit, receiver, switch, the PC, radio-frequency oscillator are connected with microprocessor, and the power supply provides electric energy to microprocessor, wave detector, pre-amplification circuit, transmitter, receiver, radio-frequency power amplifier, radio-frequency oscillator, Larmor frequency device respectively；The switch is connected with probe.
As shown in Fig. 2 for a kind of probe circuit connection figure of nuclear magnetic resonance instrument probe of the invention.The probe is made up of inductance L and electric capacity C1, tunable capacitor C2, and the electric capacity C1 and tunable capacitor C2 are connected in parallel, then in parallel with inductance L.Wherein, the inductance coil is present invention probe vitals, and the inductance coil also has the characteristic of resistance and electric capacity simultaneously in addition to inductance characteristic；The inductance coil adopts solenoid coil, its advantage：1. it is spaced between coil uniform so as to good magnetic field homogeneity and high q-factor；2. simple structure, easily makes；In sum, solenoid type simple structure and good magnetic field homogeneity and high q-factor can be obtained.Inductance element is constituted without magnetic sheet metal by 2 or 4 symmetrical I shapes, multigroup adjustable or fixed capacity device is connected between sheet metal.
The microprocessor adopts MSP430 series monolithics.
Operation principle and process are illustrated with reference to accompanying drawing and technical scheme：Radio-frequency oscillator produces strength, and by emitter pulse RF pulse signal is modulated into, and the amplification of Jing radio-frequency power amplifiers becomes strong and short RF power pulses and is added on probe coil.When there is nuclear magnetic resonance, a strength modulated will be induced in coil and is received by receiver.In order to avoid the Power leakage of transmitter is in receiver, when transmitter works, receiver disconnects；When receiver operation, transmitter disconnects.Here it is so-called timesharing is received, realize transmitting with the switching for receiving by probe switch.Receiver is received premenstrual the putting after amplifier amplifies of signal and is filtered by low pass filter, and detection is carried out by phase-sensitive detector, then computer is uploaded to Jing after analog-digital converter collection is for data signal,, to the solution analysis of spectrum of the echo-signal, the nature and characteristic parameter of sample is obtained by computer.
It is understandable that, above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to the technical scheme described by the embodiment of the present invention, it will be understood by those within the art that, still the present invention can be modified or equivalent, to reach identical technique effect；As long as satisfaction uses needs, all within protection scope of the present invention.
Claims (3)
1. a kind of nuclear magnetic resonance instrument probe, including power supply, PC, microprocessor, wave detector, pre-amplification circuit, transmitter, receiver, radio-frequency power amplifier, radio-frequency oscillator, Larmor frequency device, switch, probe；It is characterized in that：The output end of the microprocessor is sequentially connected Larmor frequency device, transmitter, radio-frequency power amplifier, switch, the output end of the microprocessor is sequentially connected wave detector, pre-amplification circuit, receiver, switch, the PC, radio-frequency oscillator are connected with microprocessor, and the power supply provides electric energy to microprocessor, wave detector, pre-amplification circuit, transmitter, receiver, radio-frequency power amplifier, radio-frequency oscillator, Larmor frequency device respectively；The switch is connected with probe.
2. a kind of nuclear magnetic resonance instrument probe according to claim 1, it is characterised in that：The probe is made up of inductance L and electric capacity C1, tunable capacitor C2, and the electric capacity C1 and tunable capacitor C2 are connected in parallel, then in parallel with inductance L.
3. a kind of nuclear magnetic resonance instrument probe according to claim 1, it is characterised in that：The microprocessor adopts MSP430 series monolithics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510735680.6A CN106646294A (en) | 2015-11-03 | 2015-11-03 | Nuclear magnetic resonance spectrometer probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510735680.6A CN106646294A (en) | 2015-11-03 | 2015-11-03 | Nuclear magnetic resonance spectrometer probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106646294A true CN106646294A (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510735680.6A Pending CN106646294A (en) | 2015-11-03 | 2015-11-03 | Nuclear magnetic resonance spectrometer probe |
Country Status (1)
| Country | Link |
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| CN (1) | CN106646294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190154773A1 (en) * | 2017-11-22 | 2019-05-23 | General Electric Company | Rf coil array for an mri system |
| CN110346398A (en) * | 2019-08-23 | 2019-10-18 | 武汉中科牛津波谱技术有限公司 | A kind of magnetic resonance probe vector tuning detection device and method |
-
2015
- 2015-11-03 CN CN201510735680.6A patent/CN106646294A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190154773A1 (en) * | 2017-11-22 | 2019-05-23 | General Electric Company | Rf coil array for an mri system |
| US10983185B2 (en) * | 2017-11-22 | 2021-04-20 | General Electric Company | RF coil array for an MRI system |
| CN110346398A (en) * | 2019-08-23 | 2019-10-18 | 武汉中科牛津波谱技术有限公司 | A kind of magnetic resonance probe vector tuning detection device and method |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |
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| WD01 | Invention patent application deemed withdrawn after publication |