CN103411991B - Portable low-field NMR old frying oil analyzer - Google Patents

Portable low-field NMR old frying oil analyzer Download PDF

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CN103411991B
CN103411991B CN 201310362056 CN201310362056A CN103411991B CN 103411991 B CN103411991 B CN 103411991B CN 201310362056 CN201310362056 CN 201310362056 CN 201310362056 A CN201310362056 A CN 201310362056A CN 103411991 B CN103411991 B CN 103411991B
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CN 201310362056
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CN103411991A (en )
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杨培强
刘利荣
张英力
孙宝刚
石志东
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上海纽迈电子科技有限公司
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Abstract

<b>本发明公开了一种便携式低场核磁共振煎炸老油分析仪,包括便携箱和显示器,便携箱内包括磁体柜、射频柜和谱仪;样品放入进样孔内,首先谱仪产生的射频信号经射频柜内射频功放功率放大后由射频线圈激励放置在磁场中的样品,激励结束后,射频线圈再接收样品的核磁共振信号,该信号经过前置放大器滤波放大后,由谱仪接收处理,谱仪事先已经安装了针对食用油品质分析应用的软件,经过分析得到结果;检测一个样品所需时间不超过两分钟。 <B> The present invention discloses a portable low-field NMR aging frying oil analyzer, and a display comprising a portable case, the portable tank cabinet comprises a magnet, radio cabinets and spectrometer; sample into the injection hole, first spectrum radio frequency signal generating device after the sample is placed in a magnetic field after the RF power amplifier RFPA cabinet energized by the RF coil, after the end of the excitation, then the RF coil receives NMR signals of the sample, the signal is filtered and amplified through a preamplifier, the reception processing spectrometer, the spectrometer has been previously applied for oil quality analysis software installation, the results obtained after analysis; the time required for detecting a sample is less than two minutes. 本发明主要特点是便于携带和快速检测,利于现场检测,并且利用低场核磁共振技术得出的检测结果正确性和稳定性都很高。 The main feature of the present invention is easy to carry and rapid detection, field detection beneficial, and the detection result of the accuracy and stability of the low-field NMR techniques show high. </b> </ B>

Description

便携式低场核磁共振煎炸老油分析仪 Portable low-field NMR old frying oil analyzer

技术领域 FIELD

[0001]本发明涉及一种低场核磁共振油品质分析领域,具体涉及一种低场核磁共振鉴别煎炸老油的分析仪器。 [0001] The present invention relates to the field of NMR analysis of a low-quality oil-field, particularly relates to a low-field NMR analysis of differential aging frying oil instruments.

背景技术 Background technique

[0002]近年来,地沟油重返餐桌的规模已经严重威胁到了广大消费者的生命健康。 [0002] In recent years, waste oil to return to the table size has been a serious threat to the life and health of consumers. 通过多次重复煎炸使用的老油,是日常生活中最为常见的地沟油。 Through repeated use of old frying oil, it is the most common everyday cooking oil. 同时,煎炸老油也最容易被一些贪图利益的餐饮业店铺冒充食用油,进行使用。 At the same time, old frying oil is also likely to be some of the most covet the interests of the catering shop posing as cooking oil, for use. 缺乏有效的检测技术和标准,尤其是可用于快速、准确检测煎炸老油的技术使得这一现象难以扼制。 Lack of effective detection techniques and standards, in particular for rapid and accurate detection of old frying oil makes it difficult to curb this phenomenon.

[0003]食用油作为日常消费品,渗透于社会上的各个大小行业,不仅出现在每个家庭以及餐饮场所,同时也可见大小型销售市场。 [0003] edible oil as a daily consumer goods, permeates all sectors on the size of the community, not only in each family and dining options, as well as visible large and small markets. 公开号为CN101975788.B的发明专利公开了一种低场核磁共振鉴别食用油品质的方法,该方法以正品食用油和劣质地沟油弛豫时间图谱数据的区别为主要鉴别依据,以正品食用油和劣质地沟油的核磁共振信号为主要观察对象,以正品食用油与劣质地沟油的横向弛豫时间图谱数据对比分析为主要手段进行正品食用油与地沟油的快速准确鉴别。 Patent Publication No. CN101975788.B invention discloses a method of low-field NMR identify quality edible oil, the method to distinguish between genuine and inferior oil waste oil relaxation time map data as the main basis for identification, to genuine oil low-grade waste oil and the NMR signal as the main observation object to transverse relaxation time genuine oil waste oil with inferior comparative analysis of map data quickly and accurately identify genuine waste edible oil as the main means.

[0004]低场核磁共振技术在检测过程中,对样品无破坏性和侵入性,无任何污染,且测量迅速、准确。 [0004] Low field NMR technique in the detection process, the sample non-destructive and invasive, no pollution, and measured quickly and accurately. 但上述方法需要在实验室进行检测,实验仪器等均固定位置,几乎不移动,这样就带来很多不便,不能够及时的在现场进行检测,现在亟需一种方便搬运的、利于随身携带的低场核磁共振煎炸老油分析仪。 However, the above method requires testing, laboratory equipment etc. fixed position in the laboratory, hardly moving, so bring a lot of inconvenience, not able to timely detect in the field, is now a need for an easy handling, which will help carry low-field NMR old frying oil analyzer.

发明内容 SUMMARY

[0005]本发明目的是:提供一种携带方便的低场核磁共振煎炸老油分析仪。 Objective [0005] The present invention is: to provide a portable low-field NMR aging frying oil analyzer.

[0006]本发明的技术方案是: [0006] aspect of the present invention is:

[0007] —种便携式低场核磁共振煎炸老油分析仪,包括便携箱和显示器,所述便携箱包括磁体柜、射频柜和谱仪;其中,磁体柜包括磁体和处于磁体产生的磁场内的射频线圈,射频线圈上设有进样孔;射频柜设置有射频功放、前置放大器和电源,射频功放和前置放大器均与射频线圈连接,所述射频功放进行射频信号放大,前置放大器进行核磁共振信号的滤波放大;谱仪包括工控机和谱仪板卡,所述工控机进行核磁共振信号分析。 [0007] - low field NMR kind of portable analyzers old oil frying, and a display comprising a carrying case, the carrying case includes a magnet cabinets, radio cabinets and spectrometer; wherein the cabinet comprises a magnet and a magnet within the magnetic field generated by the magnet the RF coil, the RF coil is provided on the injection hole; cabinet is provided with a radio frequency RF power amplifier, a preamplifier and a power supply, RF power amplifier and preamplifier are connected to the RF coil, the RF power amplifier for amplifying a radio frequency signal, the preamplifier amplifying the filtered nuclear magnetic resonance signals; spectrometer comprising a spectrometer and IPC board, the IPC analysis of nuclear magnetic resonance signals.

[0008]优选的,所述谱仪板卡包括DDS、ADC和PSG;其中,DDS与射频功放连接,产生满足共振条件的射频信号;ADC与前置放大器连接,将射频线圈接收到的核磁共振信号进行模数转换;PSG,控制DDS、ADC的工作;DDS、PSG和ADC均安装在工控机的PCI插槽上。 [0008] Preferably, the spectrometer comprises a card DDS, ADC and the PSG; wherein, the DDS connection with the RF power amplifier, a radio frequency signal to generate a resonance condition is satisfied; and a preamplifier connected to the ADC, the RF coil receives NMR signal analog to digital conversion; PSG, control DDS, ADC work; DDS, PSG and ADC are installed on a PCI slot IPC.

[0009]优选的,进样孔的中心轴与磁体中心轴重合。 [0009] Preferably, the central axis of the injection hole axis coincides with the center of the magnet.

[0010]优选的,所述磁体的外侧紧贴磁体柜的内壁。 [0010] Preferably, the outer magnet in the magnet close to the inner wall of the cabinet.

[0011 ]优选的,磁体柜、射频柜和谱仪的高度相同,其正好装设在便携箱内。 [0011] Preferably the same height, the magnet cabinets, radio cabinets and spectrometer, which just installed in a portable tank.

[0012]优选的,进样孔有一端暴露在磁体柜外。 [0012] Preferably, the injection hole at one end exposed outside the cabinet magnet.

[0013]优选的,所述射频功放、前置放大器均设置在射频柜的内壁上,电源设置在射频柜底部。 [0013] Preferably, the RF power amplifier, preamplifier are provided on the inner wall of the cabinet RF, RF power is provided at the bottom cabinet.

[0014]优选的,便携箱的一侧设置有拉手。 [0014] Preferably, the carrying case is provided with a side handle.

[0015]优选的,工控机的视频接口连接外部显示器 [0015] Preferably, the IPC video interface to connect an external monitor

[0016]使用本发明之前,工控机内已经安装正品油的横向弛豫时间图谱的数据库和分析软件,然后将装有待检测的油样品的玻璃管插入进样孔,射频信号经过发射线圈发射激励样品产生核磁共振现象。 [0016] Before the present invention, the IPC database and analysis software has been installed transverse relaxation time map genuine oil, then the oil sample loading the glass tube to be detected is inserted into the injection hole, through the transmit coil transmitting a radio frequency signal excitation samples nuclear magnetic resonance phenomenon. 然后进行采样,射频线圈接收到核磁共振信号后,经过处理然后与正品油的横向弛豫时间图谱进行对比、分析,结果由外部显示器显示。 Then sampled RF coil to the NMR signals received, processed and compared with the transverse relaxation time spectra genuine oil, analysis showed that an external monitor.

[0017]本发明的优点是: [0017] The advantage of the present invention are:

[0018] 1.便携箱内装设了磁体柜、射频柜和谱仪,方便携带,能够随时赶往不同的地点进行油品质的快速检测,省去了来回实验室的时间、路费和人工费等。 [0018] 1. The magnet is mounted inside the mobile cabinets, radio cabinets and spectrometer, easy to carry, at any time can be rushed to the different locations of oil quality rapid detection, eliminating the round-trip time of the laboratory, and labor charges tolls .

[0019].在油品检测时,分析仪能够进行快速检测,2分钟内即可完成检测,分析过程耗时短,并且准确率和稳定性高,提高了工作效率。 [0019] Upon detection of oil, the analyzer can be quickly detected, the detection can be completed within 2 minutes, the analysis process less time consuming, and the high accuracy and stability, improve the work efficiency.

附图说明 BRIEF DESCRIPTION

[0020]下面结合附图及实施例对本发明作进一步描述: [0020] Example embodiments of the present invention will be further described in conjunction with the accompanying drawings and the following:

[0021]图1为本发明的不意图; [0021] FIG. 1 is not intended that the present invention;

[0022]图2为本发明中磁体柜内部示意图; [0022] Fig 2 a schematic view of the interior of the cabinet of the present invention, the magnet;

[0023]图3为本发明中射频柜的内部示意图; [0023] Fig 3 a schematic view of the interior of the cabinet of the present invention a radio frequency;

[0024]图4为本发明中谱仪背部插口示意图; [0024] FIG. 4 is a schematic view of the socket back spectrometer invention;

[0025]图5为本发明分析仪的工作原理。 [0025] FIG. 5 meter operation principle of the present invention.

[0026]其中:I.便携箱,11.拉手,2.磁体柜,21.磁体柜壁,22.磁体,23.射频线圈,24.进样孔,3.射频柜,31.射频功放,32.前置放大器,33.电源,4.谱仪,41.DDS,42.PSG,43.ADC0 [0026] wherein:.. I carrying case, 11 handle, two magnets cabinets, 21 magnet cabinet wall, 22 a magnet, 23 a radio frequency coil, 24 injection holes 3 radio cabinets, 31 RF amplifier,....... 32. The preamplifier 33 power supply, 4. spectrometer, 41.DDS, 42.PSG, 43.ADC0

具体实施方式 detailed description

[0027] 实施例: [0027] Example:

[0028]如图1所示,便携箱I内固定设置有磁体柜2、射频柜3和谱仪4,其三者的高度相同,当便携箱I闭合时,它们能够正好处于便携箱I内,便携箱I的一端还设置有拉手U,当要移动便携箱I时,便于携带。 [0028] 1, the carrying case provided with a magnet fixed to the cabinet I 2, RF 3 and counter spectrometer 4, the height of three identical, when closed carrying case I, which can be well within the portable case I one end of the carrying case provided with a handle I U, when I want to move the carrying case, easy to carry.

[0029]图2为磁体柜2的内部示意图,磁体22紧贴磁体柜壁21的内壁,磁体柜2中间设置有射频线圈23,射频线圈23上开设有进样孔24,进样孔24的中心轴与磁体22的中心轴重合,进样孔24—端暴露在磁体柜2的外部。 [0029] FIG. 2 is a schematic view of an internal magnet of the cabinet 2, a magnet 22 close to the inner wall of the cabinet wall 21 of the magnet, the magnet is provided with a cabinet 2 intermediate RF coil 23, 23 defines a 24, the injection hole injection holes 24 of the RF coil central axis coincides with the central axis of the magnet 22, the injection well of a 24 exposed to the exterior end of the cabinet 2 of the magnet.

[0030]图3为射频柜3的内部示意图,射频功放31和前置放大器32设置在射频柜3的内壁两侧,射频功放31和前置放大器32均与射频线圈23连接,电源33设置在射频柜3的底部,其为射频功放31和前置放大器32提供电力。 [0030] FIG. 3 is a schematic view of an internal cabinet RF 3, RF power amplifier 31 and the preamplifier 32 provided on both sides of the inner wall 3 of the cabinet RF, RF power amplifier 31 and the preamplifier 32 are connected to the RF coil 23, power supply 33 is provided the bottom of the cabinet 3 radio, which provides power to the RF power amplifier 31 and the preamplifier 32.

[0031 ]图4为谱仪4背部插口示意图,谱仪4包括工控机,并在工控机的PCI插槽上安装了DDS4UPSG42和ADC43;DDS41接收工控机发来的参数并且产生射频信号,然后传送到与其连接的射频功放31进行功率放大;ADC43将与其连接的前置放大器32放大后的核磁共振信号转换成数字信号,并送入工控机;PSG42控制DDS41和ADC43的工作,进行脉冲序列的控制,谱仪4可以连接至外部显示器。 [0031] FIG. 4 is a schematic diagram of the spectrometer jack back 4, 4 spectrometer comprising IPC, and the DDS4UPSG42 ADC43 and mounted on the PCI slot IPC; DDS41 IPC receiving incoming radio frequency signal and generating a parameter, and then transmitted RF power amplifier 31 connected thereto to the power amplification; NMR signal into digital signal preamplifier 32 attached thereto to ADC43 amplified and fed to the IPC; PSG42 control DDS41 ADC43 and the work, controlling the pulse sequence , spectrometer 4 may be connected to an external monitor.

[0032]图5为本发明的工作原理示意图,在使用本发明的分析仪前,工控机内已经安装了工控机内已经安装正品油的横向弛豫时间图谱的数据库和分析软件,然后将装有待检测的油样品的玻璃管插入进样孔,打开分析仪,现有工控机计算出波形参数,传输至DDS41,并且在PSG42的控制下,调制成所需的方波,传送至射频功放31将信号进行功率放大,并传送至射频线圈23,激励样品产生核磁共振现象;射频线圈23接收到核磁共振信号后,将其传送给前置放大器32进行功率放大,并传送给ADC43,ADC43经由PSG42脉冲序列的控制将核磁共振信号转换成数字信号;然后经过工控机转换成横向弛豫时间图谱与数据库内的正品油的横向弛豫时间图谱,进行对比分析,结果由外部显示器显示,检测在2分钟内完成。 [0032] Operation Figure 5 is a schematic diagram of the present invention, before using the analyzer of the present invention, the IPC has a transverse relaxation time maps has been installed in the IPC genuine oil database and analysis software installation, and then loaded glass oil sample to be detected is inserted into the injection hole, open the analyzer, prior calculated IPC waveform parameters, transmitted to DDS41, PSG42 and under the control of a desired square wave modulation, is transmitted to the RF power amplifier 31 the signal power-amplified and sent to the RF coil 23, the excitation phenomenon of nuclear magnetic resonance samples; the RF coil 23 receives NMR signals, transmits it to the head amplifier 32 amplifies the power, and transmitted to ADC43, ADC43 via PSG42 the NMR pulse sequence control signal into a digital signal; IPC then converted through transverse relaxation time spectra and transverse relaxation time spectra genuine oil in the database, comparative analysis result is displayed on an external monitor, detect 2 completed within minutes.

[0033]本发明所述的分析仪,携带方便,利于现场检测,并且利用低场核磁共振技术得出的检测结果正确性和稳定性都很高。 [0033] The analyzer according to the present invention, portable, on-site facilitates the detection, and low field NMR technique using a detection result obtained high accuracy and stability.

[0034]本领域的技术人员容易理解,以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 [0034] Those skilled in the art will readily appreciate, the above-described preferred embodiment of the present invention only but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, equivalent substitutions, and improvements, etc., should be included within the scope of the present invention.

Claims (4)

  1. 1.一种便携式低场核磁共振煎炸老油分析仪,其特征在于,包括便携箱和显示器,所述便携箱包括: 磁体柜,包括磁体和处于磁体产生的磁场内的射频线圈,射频线圈上设有进样孔;射频柜,设置有射频功放、前置放大器和电源,射频功放和前置放大器均与射频线圈连接,所述射频功放进行射频信号放大,前置放大器进行核磁共振信号的滤波放大; 谱仪,包括工控机和谱仪板卡,所述工控机进行核磁共振信号分析; 所述谱仪板卡包括: DDS,与射频功放连接,产生满足共振条件的射频信号; ADC,与前置放大器连接,将射频线圈接收到的核磁共振信号进行模数转换; PSG,控制DDS、ADC的工作; DDS、PSG和ADC均安装在工控机的PCI插槽上; 磁体柜、射频柜和谱仪的高度相同,其正好装设在便携箱内; 所述射频功放、前置放大器均设置在射频柜的内壁上,电源 A portable low-field NMR analyzer old oil frying, characterized in that the carrying case and including a display, said carrying case comprising: a magnetic panel including a magnet and RF coil is in the magnetic field generated by a magnet, RF coil provided with injection holes; radio cabinets, provided with a radio frequency power amplifier, a preamplifier and a power supply, RF power amplifier and preamplifier are connected to the RF coil, the RF power amplifier for amplifying RF signals, nuclear magnetic resonance signal preamplifier filter amplifier; spectrometer, comprising a spectrometer and IPC board, the IPC analysis of nuclear magnetic resonance signal; said spectrometer comprising card: DDS, and connected to the RF power amplifier, a radio frequency signal to generate a resonance condition is satisfied; the ADC, a preamplifier connected to the RF coil receives NMR signals to analog to digital conversion; the PSG, the DDS control, operation of the ADC; DDS, PSG and ADC are installed on a PCI slot IPC; magnet cabinet, radio cabinet spectrometer and the same height, which is just mounted in a portable tank; the RF power amplifier, preamplifier are provided on the inner wall of the radio cabinet, power supply 设置在射频柜底部; 便携箱的一侧设置有拉手; 工控机的视频接口连接外部显示器。 At the bottom of the cabinet is provided a radio frequency; side tank is provided with a portable handle; IPC video interface to connect an external monitor.
  2. 2.根据权利要求1所述的便携式低场核磁共振煎炸老油分析仪,其特征在于,进样孔的中心轴与磁体中心轴重合。 2. The portable low field according to claim 1 NMR analyzer old oil frying, characterized in that the central axis of the injection hole axis coincides with the center of the magnet.
  3. 3.根据权利要求1所述的便携式低场核磁共振煎炸老油分析仪,其特征在于,所述磁体的外侧紧贴磁体柜的内壁。 The portable claim 1 low field nuclear magnetic resonance analyzer aging frying oil as claimed in claim, wherein said outer magnet against an inner wall of the magnet cabinet.
  4. 4.根据权利要求1所述的便携式低场核磁共振煎炸老油分析仪,其特征在于,进样孔有一端暴露在磁体柜外。 The portable according to claim 1, wherein the low-field nuclear magnetic resonance analyzer old oil frying, characterized in that the end of the injection hole is exposed outside of the cabinet magnet.
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CN104407315B (en) * 2014-12-08 2017-05-17 东南大学 A portable integrated low-field NMR apparatus
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