CN103411991B - Portable low-field nuclear magnetic resonance frying oil analyser - Google Patents
Portable low-field nuclear magnetic resonance frying oil analyser Download PDFInfo
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- CN103411991B CN103411991B CN201310362056.7A CN201310362056A CN103411991B CN 103411991 B CN103411991 B CN 103411991B CN 201310362056 A CN201310362056 A CN 201310362056A CN 103411991 B CN103411991 B CN 103411991B
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Abstract
<b> the invention discloses a kind of Portable low-field nuclear magnetic resonance frying oil analyser, comprises carrying case and display, comprises magnet cabinet, radio frequency cabinet and spectrometer in carrying case; Sample holes put into by sample, first the radiofrequency signal that spectrometer produces is encouraged the sample be placed in magnetic field after radio-frequency (RF) power amplification power amplification in radio frequency cabinet by radio-frequency coil, after excitation-off, radio-frequency coil receives the NMR signal of sample again, this signal is after prime amplifier filter and amplification, receive process by spectrometer, the software for edible oil quality analytical applications installed in advance by spectrometer, obtains result by analysis; Detect a sample required time and be no more than two minutes.Principal feature of the present invention is easy to carry and detects fast, is beneficial to Site Detection, and the testing result correctness utilizing low-field nuclear magnetic resonance technology to draw and stability all very high.</b>
Description
Technical field
the present invention relates to a kind of low-field nuclear magnetic resonance oil quality analysis field, be specifically related to the analytical instrument that a kind of low-field nuclear magnetic resonance differentiates frying oil.
Background technology
in recent years, the life and health of consumers in general has been arrived in the scale serious threat that waste oil returns to dining table.By repeatedly repeating to fry the old oil used, it is waste oil the most common in daily life.Meanwhile, frying oil is also the most easily pretended to be edible oil by some catering trade shops seeking interests, uses.Lack effective detection technique and standard, the technology being particularly useful for fast, accurately detecting frying oil makes this phenomenon be difficult to control.
edible oil, as common consumer product, permeates each size industry in society, not only appears at each family and food and drink place, also show large small-sized selling market simultaneously.Publication number is a kind of method that the patent of invention of CN101975788.B discloses that low-field nuclear magnetic resonance differentiates edible oil quality, the method mainly differentiates foundation with certified products edible oil and being distinguished as of waste oil relaxation time spectrum data inferior, with the NMR signal of certified products edible oil and waste oil inferior for main detection object, with the T2 spectrum data comparative analysis of certified products edible oil and waste oil inferior for Main Means carries out the quick and precisely discriminating of certified products edible oil and waste oil.
low-field nuclear magnetic resonance technology, in testing process, to sample without destructive and invasive, without any pollution, and is measured rapidly, accurately.But said method needs to detect in laboratory, experimental apparatuss etc. are fixed position all, moves hardly, so just brings a lot of inconvenience, can not detect at the scene timely, need badly now a kind of convenient carrying, be beneficial to the low-field nuclear magnetic resonance frying oil analyser carried with.
Summary of the invention
the present invention seeks to: a kind of low-field nuclear magnetic resonance frying oil analyser easy to carry is provided.
technical scheme of the present invention is:
a kind of Portable low-field nuclear magnetic resonance frying oil analyser, comprise carrying case and display, described carrying case comprises magnet cabinet, radio frequency cabinet and spectrometer; Wherein, magnet cabinet comprises magnet and is in the radio-frequency coil in the magnetic field of magnet generation, and radio-frequency coil is provided with sample holes; Radio frequency cabinet is provided with radio-frequency (RF) power amplification, prime amplifier and power supply, and radio-frequency (RF) power amplification is all connected with radio-frequency coil with prime amplifier, and described radio-frequency (RF) power amplification carries out radiofrequency signal amplification, and prime amplifier carries out the filter and amplification of NMR signal; Spectrometer comprises industrial computer and spectrometer board, and described industrial computer carries out NMR signal analysis.
preferably, described spectrometer board comprises DDS, ADC and PSG; Wherein, DDS is connected with radio-frequency (RF) power amplification, produces the radiofrequency signal meeting resonant condition; ADC is connected with prime amplifier, and the NMR signal received by radio-frequency coil carries out analog to digital conversion; PSG, the work of control DDS, ADC; DDS, PSG and ADC are installed on the PCI slot of industrial computer.
preferably, the central shaft of sample holes overlaps with magnet center axle.
preferably, the inwall of magnet cabinet is close in the outside of described magnet.
preferably, magnet cabinet, radio frequency cabinet are identical with the height of spectrometer, and it is just in time installed in carrying case.
preferably, sample holes has one end to be exposed to outside magnet cabinet.
preferably, described radio-frequency (RF) power amplification, prime amplifier are all arranged on the inwall of radio frequency cabinet, and power supply is arranged on bottom radio frequency cabinet.
preferably, the side of carrying case is provided with handle.
preferably, the video interface of industrial computer connects external display
before using the present invention, database and the analysis software of the T2 collection of illustrative plates of certified products oil have been installed in industrial computer, then the glass tube that oil samples to be detected is housed is inserted sample holes, radiofrequency signal is launched excitation sample through transmitting coil and is produced nmr phenomena.Then sample, after radio-frequency coil receives NMR signal, then carry out contrasting, analyzing with the T2 collection of illustrative plates of certified products oil through process, result is shown by external display.
advantage of the present invention is:
1. installed magnet cabinet, radio frequency cabinet and spectrometer in carrying case, be convenient for carrying, the quick detection that oil quality is carried out in different places can have been rushed at any time, eliminate back and forth the time in laboratory, travelling expenses and labour cost etc.
. when oil product detects, analyser can detect fast, can complete detection in 2 minutes, and analytic process is consuming time short, and accuracy rate and stability high, improve work efficiency.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
fig. 1 is schematic diagram of the present invention;
fig. 2 is magnet cabinet schematic internal view in the present invention;
fig. 3 is the schematic internal view of radio frequency cabinet in the present invention;
fig. 4 is spectrometer back socket schematic diagram in the present invention;
fig. 5 is the principle of work of analyser of the present invention.
wherein: 1. carrying case, 11. handles, 2. magnet cabinet, 21. magnet cabinet walls, 22. magnets, 23. radio-frequency coils, 24. sample holes, 3. radio frequency cabinet, 31. radio-frequency (RF) power amplification, 32. prime amplifiers, 33. power supplys, 4. spectrometer, 41.DDS, 42.PSG, 43.ADC.
Embodiment
embodiment:
as shown in Figure 1, carrying case 1 internal fixtion is provided with magnet cabinet 2, radio frequency cabinet 3 and spectrometer 4, and the height of its three is identical, when carrying case 1 closes, they can just in time be in carrying case 1, and one end of carrying case 1 is also provided with handle 11, when wanting Mobile portable case 1, be easy to carry.
fig. 2 is the schematic internal view of magnet cabinet 2, magnet 22 is close to the inwall of magnet cabinet wall 21, is provided with radio-frequency coil 23, radio-frequency coil 23 offers sample holes 24 in the middle of magnet cabinet 2, the central shaft of sample holes 24 overlaps with the central shaft of magnet 22, and sample holes 24 one end is exposed to the outside of magnet cabinet 2.
fig. 3 is the schematic internal view of radio frequency cabinet 3, radio-frequency (RF) power amplification 31 and prime amplifier 32 are arranged on the inwall both sides of radio frequency cabinet 3, radio-frequency (RF) power amplification 31 is all connected with radio-frequency coil 23 with prime amplifier 32, power supply 33 is arranged on the bottom of radio frequency cabinet 3, and it provides electric power for radio-frequency (RF) power amplification 31 and prime amplifier 32.
fig. 4 is spectrometer 4 back socket schematic diagram, and spectrometer 4 comprises industrial computer, and has installed DDS41, PSG42 and ADC43 on the PCI slot of industrial computer; DDS41 receives the parameter sent of industrial computer and produces radiofrequency signal, is then sent to connected radio-frequency (RF) power amplification 31 and carries out power amplification; NMR signal after connected prime amplifier 32 amplifies by ADC43 converts digital signal to, and sends into industrial computer; The work of PSG42 control DDS41 and ADC43, carries out the control of pulse train, and spectrometer 4 can be connected to external display.
fig. 5 is principle of work schematic diagram of the present invention, before use analyser of the present invention, database and the analysis software of the T2 collection of illustrative plates having installed certified products oil in industrial computer have been installed in industrial computer, then the glass tube that oil samples to be detected is housed is inserted sample holes, open analyser, existing industrial computer calculates waveform parameter, transfer to DDS41, and under the control of PSG42, be modulated into required square wave, be sent to radio-frequency (RF) power amplification 31 and signal is carried out power amplification, and be sent to radio-frequency coil 23, excitation sample produces nmr phenomena; After radio-frequency coil 23 receives NMR signal, sent to prime amplifier 32 and carry out power amplification, and send ADC43 to, ADC43 converts NMR signal to digital signal via the control of PSG42 pulse train; Then convert the T2 collection of illustrative plates of the certified products oil in T2 collection of illustrative plates and database to through industrial computer, be analyzed, result is shown by external display, detects and completes in 2 minutes.
analyser of the present invention, easy to carry, be beneficial to Site Detection, and the testing result correctness utilizing low-field nuclear magnetic resonance technology to draw and stability all very high.
those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a Portable low-field nuclear magnetic resonance frying oil analyser, is characterized in that, comprises carrying case and display, and described carrying case comprises:
Magnet cabinet, comprise magnet and be in the radio-frequency coil in the magnetic field of magnet generation, radio-frequency coil is provided with sample holes;
Radio frequency cabinet, be provided with radio-frequency (RF) power amplification, prime amplifier and power supply, radio-frequency (RF) power amplification is all connected with radio-frequency coil with prime amplifier, and described radio-frequency (RF) power amplification carries out radiofrequency signal amplification, and prime amplifier carries out the filter and amplification of NMR signal;
Spectrometer, comprise industrial computer and spectrometer board, described industrial computer carries out NMR signal analysis;
Described spectrometer board comprises:
DDS, is connected with radio-frequency (RF) power amplification, produces the radiofrequency signal meeting resonant condition;
ADC, is connected with prime amplifier, and the NMR signal received by radio-frequency coil carries out analog to digital conversion;
PSG, the work of control DDS, ADC;
DDS, PSG and ADC are installed on the PCI slot of industrial computer;
Magnet cabinet, radio frequency cabinet are identical with the height of spectrometer, and it is just in time installed in carrying case;
Described radio-frequency (RF) power amplification, prime amplifier are all arranged on the inwall of radio frequency cabinet, and power supply is arranged on bottom radio frequency cabinet;
The side of carrying case is provided with handle;
The video interface of industrial computer connects external display.
2. Portable low-field nuclear magnetic resonance frying oil analyser according to claim 1, is characterized in that, the central shaft of sample holes overlaps with magnet center axle.
3. Portable low-field nuclear magnetic resonance frying oil analyser according to claim 1, is characterized in that, the inwall of magnet cabinet is close in the outside of described magnet.
4. Portable low-field nuclear magnetic resonance frying oil analyser according to claim 1, is characterized in that, sample holes has one end to be exposed to outside magnet cabinet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310362056.7A CN103411991B (en) | 2013-08-19 | 2013-08-19 | Portable low-field nuclear magnetic resonance frying oil analyser |
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| CN201310362056.7A CN103411991B (en) | 2013-08-19 | 2013-08-19 | Portable low-field nuclear magnetic resonance frying oil analyser |
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| CN103411991A CN103411991A (en) | 2013-11-27 |
| CN103411991B true CN103411991B (en) | 2016-04-20 |
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| CN104407315B (en) * | 2014-12-08 | 2017-05-17 | 东南大学 | Portable low-field nuclear magnetic resonance integrated device |
| CN106053299B (en) | 2015-04-12 | 2020-10-30 | 艾斯拜克特Ai有限公司 | NMR imaging of fluids in non-circular cross-section conduits |
| WO2016189536A1 (en) * | 2015-05-26 | 2016-12-01 | Aspect Ai Ltd. | Apparatus and method for quality detection of a processed product |
| CN106353356A (en) * | 2015-07-17 | 2017-01-25 | 阿斯派克人工智能有限公司 | Device and method used for quantitative detection on processed material |
| US10345251B2 (en) | 2017-02-23 | 2019-07-09 | Aspect Imaging Ltd. | Portable NMR device for detecting an oil concentration in water |
| CN107219482B (en) * | 2017-04-07 | 2021-04-09 | 深圳市明致集成股份有限公司 | Portable MR imaging equipment |
| CN111189868B (en) * | 2020-02-18 | 2021-06-15 | 南京农业大学 | Method for rapidly screening adulterated illegal cooking oil in edible oil by using low-field nuclear magnetic resonance |
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