CN104458700A - Portable chemical composition remote analysis device based on Raman spectrum - Google Patents
Portable chemical composition remote analysis device based on Raman spectrum Download PDFInfo
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- CN104458700A CN104458700A CN201410756412.8A CN201410756412A CN104458700A CN 104458700 A CN104458700 A CN 104458700A CN 201410756412 A CN201410756412 A CN 201410756412A CN 104458700 A CN104458700 A CN 104458700A
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- raman spectrum
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- chemical composition
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Abstract
The invention provides a portable chemical composition remote analysis device based on a Raman spectrum, and aims at providing a Raman spectrum chemical composition analysis device with a volume as small as possible. The portable chemical composition remote analysis device comprises an MCU, a Raman spectrometer, a coding switch, a communication unit and a remote processing unit. According to the portable chemical composition remote analysis device provided by the invention, the database capacity can be relatively large and can be updated in real time, a database for saving Raman spectra of multiple chemical elements is continuously upgraded and perfected, a part of defects that the built-in database or application software of the portable Raman spectrometer cannot meet the requirements on on-site data processing, analysis and management can be overcome, and the functions of the portable Raman spectrometer are extended, so that the portable Raman spectrometer is adapted to the practical demand on on-site rapid detection.
Description
Technical field
The present invention relates to raman spectroscopy measurement device, more specifically, relate to a kind of chemical composition portable remote analytical equipment based on Raman spectrum.
Background technology
The physics of material is measured with spectrum and analytical property is a kind of proven technique in assay laboratory.Raman spectrum is the one in this kind of technology, and it can provide the information about the composition of chemical substance or the quantitative and qualitative analysis aspect of molecular structure.When incident radiation and matter interaction can there is a kind of process being called scattering in it.Ray through scattering can be flexible, and at this moment the wavelength of incident ray does not change in scattered radiation, and also can be stiff, wherein the wavelength of scattered radiation be different from incident radiation.In inelastically scattered a kind of form, claim it to be Raman scattering, incident photon is when scattering or obtain energy, or degradedness.The difference of scattering and incident radiant energy is commonly referred to as Raman and moves.Obtain Raman migration spectrum provide various molecular vibration motion energy message and the message of the chemistry that conveyed about studied material and molecular structure aspect.By detecting the Raman spectrum of sample, the material composition in sample qualitatively even semi-quantitatively can be analyzed.The sense cycle of Raman spectrum wants much shorter relative to the method such as mass spectroscopy and chromatography, can also substantially reach real-time detection in some occasions.Traditional Raman spectrometer is bulky, complex structure and involving great expense, and also needs the personnel of specialty just can carry out operating and analyzing.Along with the development of the associated components such as laser instrument, photodetector and integrated circuit and technology, Raman spectrometer is thinking miniaturization low cost future development at present.
The capacity that Portable Raman spectrometer carries database is limited, also limitation is had from the function of band spectrum storehouse discriminant software, and as a desirable Portable Raman optical spectrum measurement mechanism, preferably there is very high spectra collection efficiency, the database of continuous dilatation, and the spectrum storehouse discriminant software that constantly upgrading is perfect.These factors determine on-site rapid detection device or whether system really has vitality.
Summary of the invention
In order to the Raman spectrum chemical composition analysis device providing a kind of volume little as far as possible, the present invention proposes following technical scheme.
Based on a portable remote analytical equipment for the chemical composition of Raman spectrum, comprising:
MCU, it controls the data acquisition of Raman spectrum and transmits with the data of this analytical equipment;
Raman spectrometer, it is the near-infrared laser of 785nm for selecting LASER Light Source emission wavelength, laser energy Selecting parameter 100 ~ 200mw, integral time Selecting parameter 5 ~ 20s, obtain best Raman peaks intensity by described two parameters, obtain average Raman spectrum by continuous sweep;
Code switch, it passes through by alternating binary coding interrupteur SW 1, monostalbe trigger 74LS123, and double D trigger 745LS74 and phase inverter composition coding switch circuit are connected described MCU, and described coding switch circuit sends different coded signals and delivers to described MCU;
Communication unit, it is for transmitting the data of the average Raman spectrum that above-mentioned Raman spectrometer collects to remote processing unit, and receives the result that remote processing unit returns;
Remote processing unit, it has the database of the Raman spectrogram preserving multiple chemical element, carries out the analysis of chemical composition according to the data of above-mentioned average Raman spectrum.
Further, described analytical equipment also comprises thermal printer, for printing numerical value and the graphic recording of described result; Described thermal printer connects MCU, and described logic controller controls the enable of described thermal printer.
Further, described analytical equipment is also provided with power light, is used to indicate power supply and whether connects; Described power light connects MCU, and described logic controller controls the enable of described power light.
Further, described analytical equipment is also provided with laser indicator lamp, whether the laser head be used to indicate on described Raman spectrometer works; Described laser indicator lamp connects MCU, and described logic controller controls the enable of described laser indicator lamp.
Further, described MCU selects C8051F020U1.
The present invention has following beneficial effect: the present invention can the larger and real-time update of database volume, the database preserving the Raman spectrogram of multiple chemical element is constantly upgraded perfect, the segmental defect that database that Portable Raman spectrometer carries or application software cannot meet on-site data processing, analysis, management can be solved, the function of expansion Portable Raman spectrometer, makes it the current demand more adapting to field quick detection.
Accompanying drawing explanation
Fig. 1 shows the structured flowchart of the portable remote analytical equipment of the chemical composition based on Raman spectrum according to a preferred embodiment of the invention.
Embodiment
See Fig. 1, it is the circuit block diagram of the portable remote analytical equipment of the chemical composition that the present invention is based on Raman spectrum, the present invention is based on the portable remote analytical equipment of the chemical composition of Raman spectrum, MCU, it controls the data acquisition of Raman spectrum and transmits with the data of this analytical equipment; Raman spectrometer, it is the near-infrared laser of 785nm for selecting LASER Light Source emission wavelength, laser energy Selecting parameter 100 ~ 200mw, integral time Selecting parameter 5 ~ 20s, obtain best Raman peaks intensity by described two parameters, obtain average Raman spectrum by continuous sweep; Code switch, it passes through by alternating binary coding interrupteur SW 1, monostalbe trigger 74LS123, and double D trigger 745LS74 and phase inverter composition coding switch circuit are connected described MCU, and described coding switch circuit sends different coded signals and delivers to described MCU; Communication unit, it is for transmitting the data of the average Raman spectrum that above-mentioned Raman spectrometer collects to remote processing unit, and receives the result that remote processing unit returns; Remote processing unit, it has the database of the Raman spectrogram preserving multiple chemical element, carries out the analysis of chemical composition according to the data of above-mentioned average Raman spectrum.
Described analytical equipment also comprises:
Thermal printer, for printing numerical value and the graphic recording of described result; Described thermal printer connects MCU, and described logic controller controls the enable of described thermal printer;
Whether power light, be used to indicate power supply and connect; Described power light connects MCU, and described logic controller controls the enable of described power light;
Laser indicator lamp, whether the laser head be used to indicate on described Raman spectrometer works; Described laser indicator lamp connects MCU, and described logic controller controls the enable of described laser indicator lamp.
Wherein, CPU selects the C8051F020U1 of 51 series, and this is a multi-functional MCU of 8-bit High-Speed, can online programming.
EEPROM24WC08U3 is provided with, data-carrier store 628128U5, real time clock circuit PCF8563U4, display interface device J5, thermal printer interface J6, coding switch circuit, pilot lamp and laser power control circuit around this MCU.
Due to interface and peripheral circuit numerous, also have a chip select circuit be made up of 3-8 line demoder SN74HC138N U2.
Chip select circuit U2 connects the P5.4-P5.7 pin of MCU U1.
EEPROM U3 connects P0.2, P0.3 pin of MCU U1, selects two wires serial mode to connect.
The address wire of data-carrier store U5 is 14, and connect the P6 mouth of MCU U1, P5 mouth and P2.0, P2.1 pin, data line is 8, and connect the data port P7 mouth of MCU U1, Read-write Catrol OE, WE are connected in P4.6, P4.7 pin of MCU U1.
Real time clock circuit U4 selects three line serial modes to connect P0.2, P0.3, P0.5 tripod of MCU U1.
Thermal printer interface J6 connects the data port P7 mouth of MCU, its choose end by one group of U14 with door MC74HC32AN respectively brace select the P4.7 pin of Y2 and the MCU U1 of circuit U 2, its BUZY holds the P4.3 pin connecting MCUU1.
Laser power control circuit is made up of operational amplifier LM358, and its positive input terminal connects the DAC0 pin of MCU U1, and its output terminal connects the laser control signal key of Raman spectrometer by plug J4.
Interface J7, J8 of power circuit master connect interchange input, export J10 and connect display, export J11 connection thermal printer, export the power supply input that J12 connects Raman spectrometer.
Pilot lamp D1, D2 connect P3.5, P3.6 pin of MCU U1 respectively by interface J13, indicate power supply to open and laser open respectively.
Above-mentioned communication unit adopts mobile communication technology, and such as 3G/4G technology, communicates with remote processing unit, and it sends spectrogram to be analyzed to remote processing unit, and receiving and analyzing result.
Store a large amount of standard Raman spectroscopy spectrograms in described database, as with reference to Raman spectrum, compare with the average Raman spectrum data received by remote processing unit, which kind of chemical composition what judge that described average Raman spectrum represents is.Method relatively comprises cluster analysis, artificial neural network, support vector machine etc.
Above embodiment only instrument is described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that the common engineering technical personnel in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (5)
1., based on a portable remote analytical equipment for the chemical composition of Raman spectrum, comprise
MCU, it controls the data acquisition of Raman spectrum and transmits with the data of this analytical equipment;
Raman spectrometer, it is the near-infrared laser of 785nm for selecting LASER Light Source emission wavelength, laser energy Selecting parameter 100 ~ 200mw, integral time Selecting parameter 5 ~ 20s, obtain best Raman peaks intensity by described two parameters, obtain average Raman spectrum by continuous sweep;
Code switch, it passes through by alternating binary coding interrupteur SW 1, monostalbe trigger 74LS123, and double D trigger 745LS74 and phase inverter composition coding switch circuit are connected described MCU, and described coding switch circuit sends different coded signals and delivers to described MCU;
Communication unit, it is for transmitting the data of the average Raman spectrum that above-mentioned Raman spectrometer collects to remote processing unit, and receives the result that remote processing unit returns;
Remote processing unit, it has the database of the Raman spectrogram preserving multiple chemical element, carries out the analysis of chemical composition according to the data of above-mentioned average Raman spectrum.
2. the portable remote analytical equipment of the chemical composition based on Raman spectrum according to claim 1, is characterized in that: described analytical equipment also comprises thermal printer, for printing numerical value and the graphic recording of described result; Described thermal printer connects MCU, and described logic controller controls the enable of described thermal printer.
3. whether the portable remote analytical equipment of the chemical composition based on Raman spectrum according to claim 2, is characterized in that: described analytical equipment is also provided with power light, be used to indicate power supply and connect; Described power light connects MCU, and described logic controller controls the enable of described power light.
4. the portable remote analytical equipment of the chemical composition based on Raman spectrum according to claim 3, is characterized in that: described analytical equipment is also provided with laser indicator lamp, and whether the laser head be used to indicate on described Raman spectrometer works; Described laser indicator lamp connects MCU, and described logic controller controls the enable of described laser indicator lamp.
5. the portable remote analytical equipment of the chemical composition based on Raman spectrum according to claim 5, is characterized in that: described MCU selects C8051F020.
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| CN201410756412.8A CN104458700A (en) | 2014-12-11 | 2014-12-11 | Portable chemical composition remote analysis device based on Raman spectrum |
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| CN201410756412.8A CN104458700A (en) | 2014-12-11 | 2014-12-11 | Portable chemical composition remote analysis device based on Raman spectrum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770170A (en) * | 2016-12-29 | 2017-05-31 | 天津大学 | Can modularization apolegamy assembling Raman microscratch fast detector |
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| JPS55112549A (en) * | 1979-02-22 | 1980-08-30 | Nippon Steel Corp | Laser raman remote analysis method and unit thereof |
| CN101303305A (en) * | 2008-07-04 | 2008-11-12 | 中国检验检疫科学研究院 | Portable Raman optical spectrum olive oil discrimination data processing system |
| CN101614667A (en) * | 2008-06-27 | 2009-12-30 | 同方威视技术股份有限公司 | Raman spectrum system and method for measuring Raman spectrum |
| CN202661171U (en) * | 2012-06-21 | 2013-01-09 | 必达泰克光电设备(上海)有限公司 | Handheld raman spectrometer |
| CN202837188U (en) * | 2012-06-08 | 2013-03-27 | 中物院成都科学技术发展中心 | Portable optical fiber surface enhanced Raman scattering spectrometer |
| CN103837518A (en) * | 2012-11-20 | 2014-06-04 | 福州高意通讯有限公司 | Raman substance recognition platform based on cloud computing |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55112549A (en) * | 1979-02-22 | 1980-08-30 | Nippon Steel Corp | Laser raman remote analysis method and unit thereof |
| CN101614667A (en) * | 2008-06-27 | 2009-12-30 | 同方威视技术股份有限公司 | Raman spectrum system and method for measuring Raman spectrum |
| CN101303305A (en) * | 2008-07-04 | 2008-11-12 | 中国检验检疫科学研究院 | Portable Raman optical spectrum olive oil discrimination data processing system |
| CN202837188U (en) * | 2012-06-08 | 2013-03-27 | 中物院成都科学技术发展中心 | Portable optical fiber surface enhanced Raman scattering spectrometer |
| CN202661171U (en) * | 2012-06-21 | 2013-01-09 | 必达泰克光电设备(上海)有限公司 | Handheld raman spectrometer |
| CN103837518A (en) * | 2012-11-20 | 2014-06-04 | 福州高意通讯有限公司 | Raman substance recognition platform based on cloud computing |
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| CN106770170A (en) * | 2016-12-29 | 2017-05-31 | 天津大学 | Can modularization apolegamy assembling Raman microscratch fast detector |
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Application publication date: 20150325 |