CN102890067A - Methanol gasoline quick detector based on near infrared rays - Google Patents
Methanol gasoline quick detector based on near infrared rays Download PDFInfo
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- CN102890067A CN102890067A CN201210341337XA CN201210341337A CN102890067A CN 102890067 A CN102890067 A CN 102890067A CN 201210341337X A CN201210341337X A CN 201210341337XA CN 201210341337 A CN201210341337 A CN 201210341337A CN 102890067 A CN102890067 A CN 102890067A
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Abstract
The invention discloses a methanol gasoline quick detector based on near infrared rays. The methanol gasoline quick detector comprises a light source, an incident optical fiber, a sample reservoir, an emergent optical fiber, a miniature spectrometer and a computer, wherein the light source is connected with the sample reservoir through the incident optical fiber; the sample reservoir is connected with the miniature spectrometer through the emergent optical fiber; the miniature spectrometer is connected with the computer through a universal serial bus (USB) connecting line and comprises an optical fiber collimating lens, a scanning and reflecting micro-lens, a blazed grating, a plurality of spherical reflectors, an exit slit and a detector; the optical fiber collimating lens is arranged on one side of a box body of the miniature spectrometer; the scanning and reflecting micro-lens is obliquely placed on a side opposite to the optical fiber collimating lens; an acute angle is formed between the blazed grating and the scanning and reflecting micro-lens; and the spherical reflectors are diagonally opposite to the blazed grating. The methanol gasoline quick detector is convenient to carry, high in detecting speed, high in repeatability, convenient to operate and maintain and low in measurement cost, and is suitable for analyzing various types of methanol gasoline in industrial fields in an on-line manner and detecting the methanol gasoline in fields in a mobile manner.
Description
Technical field
The present invention relates to a kind of device of fast detecting content of methanol in methanol gasoline, especially a kind of device for fast detecting of the content of methanol in methanol gasoline based near infrared spectrum belongs to technical field of nondestructive testing.
Background technology
Methanol content is the most important metric attribute of methanol gasoline, in country and the provincial standard methanol content in the Vehicular methanol petrol there is clear, can not surpass 15% such as methanol content in the M15 methanol gasoline, otherwise can cause fuel value not enough, automobile power descends; Simultaneously, if methanol content is too high, may cause the octane value of methanol gasoline too low, easily damage engine.Therefore, no matter the detection of the methanol content of methanol gasoline all is very important index for methanol gasoline manufacturing enterprise or user.At present, the main detection method of methanol content has vapor-phase chromatography, spectroscopic methodology etc. in the methanol gasoline.The vapor-phase chromatography Measuring Time is shorter, and precision is high, but the experimental apparatus that the method needs is complicated, and experimental situation is had relatively high expectations, and can produce the measurement waste liquid simultaneously, and contaminated environment is not suitable for industry spot on-line analysis and field environment measurement demand.Near infrared spectroscopy is a kind of indirect measurement method of maturation, has been widely used in the fast detecting of the fuel qualities such as octane number at present, has the advantages such as detection speed is fast, good reproducibility, operation and maintenance is easy, the measurement cost is low.
But the Fourier Transform Near Infrared instrument is expensive, and volume and weight is all larger, and is not portable, is only suitable for using in the laboratory environment analysis to measure.Be in harmonious proportion enterprise for the small-sized methanol gasoline of numerous domestic, or oil depot petrol station etc. needs to detect in real time fast the user of methanol gasoline quality and inapplicable.
Summary of the invention
The purpose of this invention is to provide a kind ofly be easy to carry, detection speed is fast, good reproducibility, operation and maintenance are convenient, measure cost low based near infrared methanol gasoline fast detector.
The present invention is achieved by the following technical programs:
A kind of based near infrared methanol gasoline fast detector, comprise light source, incident optical, sample cell, outgoing optical fiber, micro spectrometer and computing machine, described light source links to each other with sample cell by incident optical, described sample cell links to each other with micro spectrometer by outgoing optical fiber, and micro spectrometer links to each other with computing machine by the USB connecting line; Described micro spectrometer comprises fiber optic collimator mirror, scanning reflection micro mirror, blazed grating, several piece spherical reflector, exit slit, detector, in the micro spectrometer casing, the fiber optic collimator mirror is arranged on micro spectrometer casing one side, and is corresponding with outgoing optical fiber output end position; The scanning reflection micro mirror is tilting at fiber optic collimator mirror offside, and blazed grating and scanning reflection micro mirror acutangulate setting, and the several piece spherical reflector is separately positioned on the oblique offside of blazed grating; Light signal outgoing to be measured is entered in the micro spectrometer casing by outgoing optical fiber, incide on the scanning reflection micro mirror via the fiber optic collimator mirror, scanning reflection micro mirror reflected light signal is to blazed grating, blazed grating resolves into the incident polychromatic light in the monochromatic light of different wave length, after the spherical reflector of correspondence is assembled, enter in the detector by slit successively, realize treating the scanning of the full spectral line of photometry signal.
Purpose of the present invention can also further realize by following technical measures.
Aforesaid based near infrared methanol gasoline fast detector, the light source of wherein said light signal to be measured adopts tungsten sodium lamp, and described tungsten sodium lamp light covers the wavelength band of 200 ~ 2500nm.
Aforesaid based near infrared methanol gasoline fast detector, wherein said sample cell both sides are respectively equipped with fibre-optical splice, and the sample cell upper end is provided with for the groove that inserts sampling receptacle.
Volume of the present invention is little, lightweight, be easy to carry, and is fit to the methanol content of industry spot on-line analysis and the various methanol gasolines of open-air flow detection; Detection speed is fast, good reproducibility, operation and maintenance are convenient, it is low to measure cost.
Advantage and disadvantage of the present invention will be for illustration and explanation by the non-limitative illustration of following preferred embodiment, and these embodiment only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of micro spectrometer of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, the present invention includes light source 1, incident optical 2, sample cell 3, outgoing optical fiber 4, micro spectrometer 5 and computing machine 6, light source 1 adopts wavelength band 200 ~ 2500nmd tungsten sodium lamp, and tungsten sodium lamp light source stable output satisfies the performance requirement of fast detector.Light source 1 links to each other with sample cell 3 by incident optical 2, and sample cell 3 links to each other with micro spectrometer 5 by outgoing optical fiber 4, and micro spectrometer 5 links to each other with computing machine 6 by USB connecting line 7.
Sample cell 3 both sides are respectively equipped with fibre-optical splice 31, and sample cell 3 upper ends are provided with groove 32, and the groove 32 of the present embodiment is the rectangular parallelepiped groove of 100mm * 100mm * 50mm, are used for inserting sampling receptacle 33.Sample cell 3 materials are selected quartz or glass cuvette usually.Inject sample cell 3 from the incident light that the light source 1 of tungsten sodium lamp sends through the incident optical 2 of sample cell 3 one sides, pass sample cell 3 and specimen after, transmitted light enters outgoing optical fiber 4 from sample cell 3 opposite sides.In order to improve signal to noise ratio (S/N ratio), in actual testing process, need to measure the half-light spectrum, the signal that micro spectrometer 5 measured when namely light source 1 extinguished, these signals are ground unrests, should deduct from optical signal transmissive.In order to measure half-light spectrum, one and the unidimensional aluminium block of sampling receptacle are put into the groove 32 of sample cell 3, because aluminium block has blocked whole incident lights, so the spectral signal that spectrometer collects is the half-light spectrum.
As shown in Figure 2, the micro spectrometer 5 of the present embodiment comprises fiber optic collimator mirror 51, scanning reflection micro mirror 52, blazed grating 53, three spherical reflectors 54, exit slit 55, detector 56, in micro spectrometer casing 57, fiber optic collimator mirror 51 is arranged on micro spectrometer casing 57 1 sides, and is corresponding with outgoing optical fiber 4 output end positions; Scanning reflection micro mirror 52 is tilting at fiber optic collimator mirror 51 offsides, and blazed grating 53 acutangulates setting with scanning reflection micro mirror 52, and three spherical reflectors 54 are separately positioned on the oblique offside of blazed grating 53.
Optical signals outgoing optical fiber 4 to be measured enters micro spectrometer 5 inside, light signal incides on the scanning reflection micro mirror 52 via fiber optic collimator mirror 51, scanning reflection micro mirror 52 reflected light signals are to blazed grating 53, and blazed grating 53 resolves into the incident polychromatic light in the monochromatic light of different wave length.Scanning reflection micro mirror 52 can be finished the scanning of full spectrum within a hunting period, blazed grating 53 can be selected by measured wavelength coverage.Testing requirement near infrared-infrared band spectrum, the monochromatic light of a certain wavelength can arrive on the detector 56 by entrance slit 55 via spherical reflector 54 reflections, detector 56 is placed on the convergence direction of scanning reflection micro mirror 52 catoptrons, and detector 56 is measured the monochromatic light intensity that receives.When scanning reflection micro mirror 52 keeps a certain mirror angle, only have the monochromatic light of specific wavelength just can enter in the detector 56; The minute surface periodic wobble of scanning reflection micro mirror 52, so that the incident angle of incident polychromatic light on blazed grating 53 and each monochromatic space arrangement position are cyclical variation, and the monochromatic light that makes different wave length is after spherical reflector 54 is assembled, enter in the detector 56 by exit slit 55 successively, realize treating the scanning of the full spectral line of photometry signal.In the present embodiment, when scanning reflection micro mirror 52 swings on three different positions, the monochromatic light of 900nm, 1500nm and three kinds of different wave lengths of 2500nm is arranged respectively after each self-corresponding spherical reflector 54 is assembled, enter in the detector 56 by exit slit 55 successively.
The different near infrared light signal that detector 56 will carry sample message is sent into micro spectrometer 5 and is changed electric signal into by pre-amplification circuit, by USB connecting line 7 model of setting up is passed in the respective memory of computing machine 6, after being convenient to it is directly called.Electric signal converts digital signal to through the A/D conversion equipment, and chooses the model of having set up test volume is calculated, with calculate the result show at the display of computing machine 6.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (3)
1. one kind based near infrared methanol gasoline fast detector, it is characterized in that, comprise light source, incident optical, sample cell, outgoing optical fiber, micro spectrometer and computing machine, described light source links to each other with sample cell by incident optical, described sample cell links to each other with micro spectrometer by outgoing optical fiber, and micro spectrometer links to each other with computing machine by the USB connecting line; Described micro spectrometer comprises fiber optic collimator mirror, scanning reflection micro mirror, blazed grating, several piece spherical reflector, exit slit and detector, in the micro spectrometer casing, the fiber optic collimator mirror is arranged on micro spectrometer casing one side, and is corresponding with outgoing optical fiber output end position; The scanning reflection micro mirror is tilting at fiber optic collimator mirror offside, and blazed grating and scanning reflection micro mirror acutangulate setting, and the several piece spherical reflector is separately positioned on the oblique offside of blazed grating; Light signal outgoing to be measured is entered in the micro spectrometer casing by outgoing optical fiber, incide on the scanning reflection micro mirror via the fiber optic collimator mirror, scanning reflection micro mirror reflected light signal is to blazed grating, blazed grating resolves into the incident polychromatic light in the monochromatic light of different wave length, after the spherical reflector of correspondence is assembled, enter in the detector by slit successively, realize treating the scanning of the full spectral line of photometry signal.
2. as claimed in claim 1ly it is characterized in that based near infrared methanol gasoline fast detector, the light source of light signal to be measured adopts tungsten sodium lamp, and described tungsten sodium lamp light covers the wavelength band of 200 ~ 2500nm.
3. as claimed in claim 1ly it is characterized in that based near infrared methanol gasoline fast detector, described sample cell both sides are respectively equipped with fibre-optical splice, and the sample cell upper end is provided with for the groove that inserts sampling receptacle.
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| CN201210341337XA CN102890067A (en) | 2012-09-17 | 2012-09-17 | Methanol gasoline quick detector based on near infrared rays |
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| CN201210341337XA CN102890067A (en) | 2012-09-17 | 2012-09-17 | Methanol gasoline quick detector based on near infrared rays |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245634A (en) * | 2013-05-16 | 2013-08-14 | 江苏物联网研究发展中心 | Miniature single-chip integrated infrared gas sensor |
| CN103257117A (en) * | 2013-02-25 | 2013-08-21 | 中国科学院安徽光学精密机械研究所 | Rapid gasoline component measurement system |
| CN106030263A (en) * | 2013-12-17 | 2016-10-12 | 斯凯孚公司 | Optical fiber sensor used for oil conditioning monitoring |
| CN106153102A (en) * | 2015-04-09 | 2016-11-23 | 北京中联电科技术有限公司 | A kind of multiparameter integration fluid sensor based on iraser technology |
| CN106525767A (en) * | 2016-12-07 | 2017-03-22 | 重庆大学 | Micro near-infrared spectrum analysis system for online oil gas detection |
| CN106770126A (en) * | 2017-01-06 | 2017-05-31 | 中国科学院上海技术物理研究所 | A kind of device and method suitable for quick detection olive oil |
| CN107764766A (en) * | 2017-12-08 | 2018-03-06 | 山东商业职业技术学院 | A kind of chilled aquatic products escaping gas analyzer |
| CN109520944A (en) * | 2017-09-19 | 2019-03-26 | 高利通科技（深圳）有限公司 | A kind of universal spectroscopic analysis system |
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| CN102590132A (en) * | 2012-02-14 | 2012-07-18 | 浙江大学 | Method for measuring methanol content in methanol gasoline |
| CN202956337U (en) * | 2012-09-17 | 2013-05-29 | 江苏惠通集团有限责任公司 | Near-infrared methanol gasoline rapid detector |
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| CN201697714U (en) * | 2009-11-20 | 2011-01-05 | 江苏惠通集团有限责任公司 | Micro-spectrometer |
| CN201594070U (en) * | 2009-12-25 | 2010-09-29 | 江苏惠通集团有限责任公司 | Sample containing groove of spectrograph sample cell |
| CN102590132A (en) * | 2012-02-14 | 2012-07-18 | 浙江大学 | Method for measuring methanol content in methanol gasoline |
| CN202956337U (en) * | 2012-09-17 | 2013-05-29 | 江苏惠通集团有限责任公司 | Near-infrared methanol gasoline rapid detector |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257117A (en) * | 2013-02-25 | 2013-08-21 | 中国科学院安徽光学精密机械研究所 | Rapid gasoline component measurement system |
| CN103245634A (en) * | 2013-05-16 | 2013-08-14 | 江苏物联网研究发展中心 | Miniature single-chip integrated infrared gas sensor |
| CN106030263A (en) * | 2013-12-17 | 2016-10-12 | 斯凯孚公司 | Optical fiber sensor used for oil conditioning monitoring |
| CN106153102A (en) * | 2015-04-09 | 2016-11-23 | 北京中联电科技术有限公司 | A kind of multiparameter integration fluid sensor based on iraser technology |
| CN106525767A (en) * | 2016-12-07 | 2017-03-22 | 重庆大学 | Micro near-infrared spectrum analysis system for online oil gas detection |
| CN106770126A (en) * | 2017-01-06 | 2017-05-31 | 中国科学院上海技术物理研究所 | A kind of device and method suitable for quick detection olive oil |
| CN106770126B (en) * | 2017-01-06 | 2023-05-05 | 中国科学院上海技术物理研究所 | Device and method suitable for rapidly detecting olive oil |
| CN109520944A (en) * | 2017-09-19 | 2019-03-26 | 高利通科技（深圳）有限公司 | A kind of universal spectroscopic analysis system |
| CN107764766A (en) * | 2017-12-08 | 2018-03-06 | 山东商业职业技术学院 | A kind of chilled aquatic products escaping gas analyzer |
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Application publication date: 20130123 |