CN102636262B - Multi-channel light splitter and mid-infrared analyzing system with same - Google Patents
Multi-channel light splitter and mid-infrared analyzing system with same Download PDFInfo
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- CN102636262B CN102636262B CN201210070657.6A CN201210070657A CN102636262B CN 102636262 B CN102636262 B CN 102636262B CN 201210070657 A CN201210070657 A CN 201210070657A CN 102636262 B CN102636262 B CN 102636262B
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- light
- sampling
- relay
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- raman
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- 238000005070 sampling Methods 0.000 claims abstract description 47
- 238000001237 Raman spectrum Methods 0.000 claims abstract description 20
- 239000000295 fuel oils Substances 0.000 claims abstract description 10
- 239000003502 gasoline Substances 0.000 claims abstract description 10
- 239000003350 kerosene Substances 0.000 claims abstract description 10
- 239000000126 substances Substances 0.000 claims abstract description 7
- 230000001276 controlling effects Effects 0.000 claims abstract description 6
- 230000000875 corresponding Effects 0.000 claims abstract description 4
- 230000003287 optical Effects 0.000 claims description 30
- 238000001069 Raman spectroscopy Methods 0.000 claims description 17
- 238000004458 analytical methods Methods 0.000 claims description 13
- 238000001228 spectrum Methods 0.000 claims description 13
- 239000000203 mixtures Substances 0.000 claims description 9
- 239000002283 diesel fuels Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 4
- 239000004065 semiconductors Substances 0.000 claims description 3
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- 238000005516 engineering processes Methods 0.000 description 7
- 238000000034 methods Methods 0.000 description 5
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- 238000002329 infrared spectrum Methods 0.000 description 4
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- 281000061198 Entergy companies 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
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Abstract
Description
Technical field
The present invention relates to a kind of spectral measurement apparatus, more particularly, the present invention relates to a kind of optical splitter with hyperchannel handoff functionality; There is this optical splitter and be applicable to the multi-component automatic analysis of fuel oil as the middle infrared analysis system of detecting device.
Background technology
Using spectrometry, minute spectroscopy technique and minute spectrum method is the technology that in a kind of definite sample, some compound exists.This technology is come existence and the concentration thereof of given element in working sample or compound by the energy interaction with sample.The equipment using is known as spectrometer or spectrograph.Spectroscopy is the main method while carrying out identification by the spectrum that material sent or absorbed by forming sample in physical chemistry or analytical chemistry.By the data of using spectroscopy to obtain, be called as spectrum.Spectrum is the drawing of the detected energy intensity of the wavelength (quality, momentum or frequency) with respect to energy.Can find relevant atom and molecular entergy level, molecular geometry configuration, chemical bond, the interaction of molecule and the information of correlated process with spectrum.Can identify with spectrum the composition in (qualitative analysis) sample.Also can be by carry out the content (quantitative test) of material in working sample with spectrum.
Wherein owing to having, analysis speed is fast, cost is low, green is analyzed and be applicable to the advantages such as online detection for near-infrared spectrum analysis, thereby is all widely used in all trades and professions.The index such as octane value, anti-knock index, benzene, aromatic hydrocarbons, alkene, oxygen content that can Accurate Determining goes out various motor petrol product oils and base oil such as near-infrared spectrum technique infrared detection technology.Traditionally, the most important application of infrared spectrum is the Structural Identification of compound, the relation by spectrogram and molecular structure and with the comparison of standard spectrogram, structure that can deterministic compound.In recent years, along with the development of instrument manufacturing technology, chemometrics method and computing machine, infrared spectrum was also more and more for fields such as on-the site analysis and online process analysis procedure analyses.For different oil products, generally adopt at present pipeline automatic cleaning technology, even like this, the mutual pollution of pipeline is also unavoidable, thus precision and repeatability that impact is measured.Not only volume is large for the multiple dispersion type light-splitting device using in above-mentioned technology in addition, cost is high, and light quantity minimizing, poor signal to noise.
Summary of the invention
In order to solve the above-mentioned technical matters existing in prior art, the object of the present invention is to provide in a kind of hyperchannel optical splitter and infrared analysis system, use device of the present invention can improve accuracy and the precision of testing result, device of the present invention is applicable to the mensuration of the physical and chemical index of the various samples such as various fuel oil such as gasoline, diesel oil, aviation kerosene.
To achieve these goals, a first aspect of the present invention relates to a kind of hyperchannel optical splitter, there is gasoline sampling passage, diesel oil sampling passage, aviation kerosene sampling passage and Raman spectrum light-dividing device, described sampling passage is all provided with sampling solenoid valve and sampling channel control device, it is characterized in that this sampling channel control device comprises power module, Programmable Logic Controller, for controlling the relay of the solenoid valve of sampling passage, the power end of described Programmable Logic Controller and the input end of described power module are all electrically connected to AC power, the corresponding connection of coil of a plurality of control signal output terminals of described Programmable Logic Controller and relay, between the solenoid valve that the switch of described relay connects one to one on described power module outlet and each sampling passage, described Programmable Logic Controller is controlled conducting or the shutoff of respective electrical magnet valve by the switch of pilot relay.
Preferably, to have wavelength be that the near infrared semiconductor laser diode of 3000nm-6000nm is as the light source portion of light source to described Raman spectrum light-dividing device; Carry out the diffraction grating of light splitting with the Raman diffused light that irradiates the sample chamber of fuel oil sample with light source and fuel oil sample is occurred and for detection of the light accepting part of the multichannel light detector of the Raman diffused light by this diffraction grating light splitting.
Preferably, described multichannel light detector is the photodetector that Ge, InGaAs or Si form.
Preferably, described light source portion also comprises the spectroscope that the light beam of light source is divided into sample beam and reference beams.
Preferably, described light accepting part also comprises the filtering apparatus of removing the composition that wavelength is identical with exciting light from the light of sample.
Preferably, described filtering apparatus is to have the bandpass optical filter that makes incentive optical wavelength composition see through and be removed the characteristic that reflects wavelength components in addition.
Preferably, described hyperchannel optical splitter is applicable to the mensuration of the physical and chemical index of gasoline, diesel oil, aviation kerosene sample.
A second aspect of the present invention relates to a kind of middle infrared analysis system, it comprises hyperchannel optical splitter, described hyperchannel optical splitter has gasoline sampling passage, diesel oil sampling passage, aviation kerosene sampling passage and Raman spectrum light-dividing device, described sampling passage is all provided with sampling solenoid valve and sampling channel control device, it is characterized in that this sampling channel control device comprises power module, Programmable Logic Controller, for controlling the relay of the solenoid valve of sampling passage, the power end of described Programmable Logic Controller and the input end of described power module are all electrically connected to AC power, the corresponding connection of coil of a plurality of control signal output terminals of described Programmable Logic Controller and relay, between the solenoid valve that the switch of described relay connects one to one on described power module outlet and each sampling passage, described Programmable Logic Controller is controlled conducting or the shutoff of respective electrical magnet valve by the switch of pilot relay, it is that the near infrared semiconductor laser diode of 3000nm-6000nm is as the light source portion of light source that described Raman spectrum light-dividing device has wavelength, carry out the diffraction grating of light splitting with the Raman diffused light that irradiates the sample chamber of fuel oil sample with light source and fuel oil sample is occurred and for detection of the light accepting part of the multichannel light detector of the Raman diffused light by this diffraction grating light splitting, with and data handling machine, the function that the detected intensity of the exciting light composition in this spectrophotometric spectra of take when described data handling machine has Raman scattering light intensity that the spectrophotometric spectra detecting according to the photodetector of above-mentioned light accepting part obtains specified wavelength as measured value is this measured value of benchmark correction.
Preferably, described middle infrared analysis system is applicable to the mensuration of the physical and chemical index of gasoline, diesel oil, aviation kerosene sample.
Compared with prior art, the present invention has the following advantages:
1. hyperchannel optical splitter of the present invention arranges solenoid valve on the passage between each sample channel, by the on off state of the solenoid valve on a plurality of sampling passages of Controlled by Programmable Controller, carry out the sampling of sample, thereby can realize different analysis of oil, by separate sense channel, realized, improved precision and the repeatability measured.
2. other hyperchannel optical splitter of the present invention adopts Raman spectrum spectral measurement apparatus, thereby is particularly suitable for the material composition of trace in fuel oil component, can realize with low cost carry out at a high speed, the measurement of high sensitivity, high precision and entry.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of hyperchannel optical splitter of the present invention;
Fig. 2 is the structural representation of sampling channel control device of the present invention;
Fig. 3 is the arrangement plan of Raman spectrum light-dividing device of the present invention;
In figure, the represented implication of each Reference numeral is respectively: 10-light source, 12-light-resource fousing lens, 14-semi-transparent semi-reflecting lens, 16-condenser lens, 30-condenser lens, 32-condenser lens, 40-dim light light filter, 42-catoptron, 44-bandpass optical filter, 46-semi-transparent semi-reflecting lens, 50-sample, 52-entrance slit, the sample light that 60-comprises Raman scattering and Ruili scattering, 62-Raman diffused light, 64-Ruili scattered light, 70-sees through focusing catoptron, 72-bandpass optical filter, 74-beam cut-off device.
Embodiment
Below with reference to the drawings and specific embodiments, technical scheme of the present invention is described further.
In the hyperchannel optical splitter of the embodiment of the present invention, on the passage between a plurality of sampling passages and Raman spectrum light-dividing device, solenoid valve is set, by Controlled by Programmable Controller control on a plurality of passages and Raman spectrum light-dividing device measuring-signal output loop on the open and close state of solenoid valve, carry out sample sampling.
Fig. 1 shows the structure principle chart of the hyperchannel optical splitter that the embodiment of the present invention provides.With reference to Fig. 1, gasoline sample, diesel samples and aviation kerosene sample are all with the sampling passage having between Raman spectrum light-dividing device separately, and Raman spectrum light-dividing device is for detection of the physical and chemical index of above-mentioned a plurality of samples.As shown in Figure 1 on the sampling passage between gasoline sample and Raman spectrum light-dividing device, be provided with the first solenoid valve 1, on the sampling passage between diesel samples and Raman spectrum light-dividing device, be provided with the second solenoid valve 2, on the sampling passage between aviation kerosene sample and Raman spectrum light-dividing device, be provided with the 3rd solenoid valve 3, sampling channel control device is connected with above-mentioned three solenoid valves, control conducting or the shutoff of the first solenoid valve 1, the second solenoid valve 2, the 3rd solenoid valve 3, and then control the sampling between three evaporators and Raman spectrum light-dividing device.
Fig. 2 shows the structural principle of sampling channel control device in Fig. 1, comprise power module, Programmable Logic Controller, a plurality of for controlling the relay of the solenoid valve on sampling passage, the power end of Programmable Logic Controller and the input end of power module are all electrically connected to AC power, a plurality of control signal output terminals of Programmable Logic Controller and the coil J1 of relay, J2, J3 connects one to one, the switch J1-1 of a plurality of relays, J2-1, J3-1 connects one to one at power module outlet and a plurality of solenoid valve E1, E2, between E3, Programmable Logic Controller is by the switch conduction of pilot relay or conducting or the shutoff of turn-offing control solenoid valve.
Power module is for being converted to the applicable alternating current of system size by alternating current, the first control signal output terminal of Programmable Logic Controller is connected with the coil J1 of the first relay, the switch J1-1 of the first relay is connected between power module 31 output terminals and the first solenoid valve E1, Programmable Logic Controller is controlled switch J1-1 conducting or the shutoff of the first relay by its first control signal output terminal, and then controls conducting or the shutoff of the first solenoid valve E1; The second control signal output terminal of Programmable Logic Controller is connected with the coil J2 of the second relay, the switch J2-1 of the second relay SG2 is connected between power module outlet and the second solenoid valve E2, Programmable Logic Controller is controlled switch J2-1 conducting or the shutoff of the second relay by its second control signal output terminal, and then controls conducting or the shutoff of the second solenoid valve E2; The 3rd control signal output terminal of Programmable Logic Controller is connected with the coil J3 of the 3rd relay, the switch J3-1 of the 3rd relay is connected between AC-AC power module 31 output terminals and the 3rd solenoid valve E3, Programmable Logic Controller is controlled switch J3-1 conducting or the shutoff of the 3rd relay by its 3rd control signal output terminal, and then controls conducting or the shutoff of the 3rd solenoid valve EV3.
Fig. 3 is the arrangement plan of Raman spectrum light-dividing device of the present invention, and described Raman spectrum light-dividing device has and sees through and remove incentive optical wavelength composition and reflect the bandpass optical filter of Raman scattering light component as the filtering apparatus of light accepting part; Bandpass optical filter is configured in minute surface one side that sees through focusing catoptron, at a side configuration beam cut-off device relative with seeing through focusing catoptron.After the light that comprises the sample of Raman diffused light and Ruili scattered light is focused on by condenser lens, from seeing through the back side of focusing catoptron, by it, enter perforation and incide bandpass optical filter.At bandpass optical filter, after the light transmission of Ruili, by beam cut-off device, absorbed, after Raman diffused light reflection, by the reflector focus that sees through focusing catoptron, through semi-transparent semi-reflecting lens, from entrance, sew up and be mapped to light-splitting device.
Middle infrared analysis system of the present invention comprises hyperchannel optical splitter and data handling machine, the function that the detected intensity of the exciting light composition in this spectrophotometric spectra of take when described data handling machine has Raman scattering light intensity that the spectrophotometric spectra detecting according to the photodetector of above-mentioned light accepting part obtains specified wavelength as measured value is this measured value of benchmark correction.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201181278Y (en) * | 2008-04-21 | 2009-01-14 | 北京航峰科伟装备技术有限公司 | Three-dimensional oil liquid dirtiness detection instrument |
| CN102004079A (en) * | 2010-09-16 | 2011-04-06 | 华南理工大学 | On-line oil particle pollution degree detection sensor based on optical sensing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4009999A (en) * | 1975-05-29 | 1977-03-01 | Technicon Instruments Corporation | Reagent supply control in automated fluid analysis |
| US5828450A (en) * | 1995-07-19 | 1998-10-27 | Kyoto Dai-Ichi Kagaku Co., Ltd. | Spectral measuring apparatus and automatic analyzer |
| JPH0954040A (en) * | 1995-08-09 | 1997-02-25 | Kdk Corp | Method for optically measuring component in exhalation |
| CN2244218Y (en) * | 1995-11-23 | 1997-01-01 | 淄博祥龙测控技术有限公司 | Intelligent beam tube chromatographic data treatment and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201181278Y (en) * | 2008-04-21 | 2009-01-14 | 北京航峰科伟装备技术有限公司 | Three-dimensional oil liquid dirtiness detection instrument |
| CN102004079A (en) * | 2010-09-16 | 2011-04-06 | 华南理工大学 | On-line oil particle pollution degree detection sensor based on optical sensing |
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