CN1206525C - Portable type near infrared mineralogical analyser - Google Patents
Portable type near infrared mineralogical analyser Download PDFInfo
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- CN1206525C CN1206525C CN 03127633 CN03127633A CN1206525C CN 1206525 C CN1206525 C CN 1206525C CN 03127633 CN03127633 CN 03127633 CN 03127633 A CN03127633 A CN 03127633A CN 1206525 C CN1206525 C CN 1206525C
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- light
- integrating sphere
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- radome
- photomodulator
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Abstract
The present invention relates to a portable near infrared mineral analyzer suitable for field site measurement of ore components, which is composed of an optical system, a signal acquisition system and a computer, wherein the optical system of the analyzer adopts an integrating sphere design, under the control of the computer, the signal acquisition system converts incident light into alternately changing light by a light modulator, and the light irradiate on a sample to be tested after light splitting by a grating, near infrared rays reflected by the sample uniformly irradiate on a sensor by the integrating sphere, the strength of near infrared light reflected by the sample in a diffuse mode is measured, and through processing by the computer, components and the content of the components of the measured sample can be obtained. The analyzer has the advantages of little volume, light weight, convenient carrying, direct test without need of sampling, convenience and swiftness, and individual sample test only needs 70 seconds to obtain the required data; the analyzer is suitable for field site component analysis of block or powder ore samples.
Description
Technical field:
The present invention relates to a kind of raster scanning near-infrared diffuse reflection spectrum analytical instrument that the geologic examination field condition carries out mineralogical analysis that is mainly used in.
Background technology:
A vital task of mining industry and geologic examination industry is carried out the mineral composition analysis exactly.The mineral of occurring in nature all are to exist with certain complex form, by just can Accurate Analysis to the detection of these complex compounds going out the composition and the content of mineral.Analytical approach commonly used at present has chemical analysis, spectrographic method etc.And it is many with X-ray diffraction methods and microprobe analysis methods when further understanding minute differences between the mineral in depth.It is the making apparatus of the process and the costliness of the complicated making specimen of needs that the existing instrument that is used for this alanysis all has a common shortcoming, and it is long to have an analytical cycle, cost height, inefficient shortcoming.Along with the development of Chemical Measurement, make near infrared technology can realize the mineral composition analysis fully.The near-infrared spectrometers of some manufacturer production is mainly used in industries such as food, oil, pharmacy at present.As in homemade Spectrumlab 400 instruments, this instrument volume is big, is not suitable for field condition test; CN94101325.1 disclosed " electric chopping light water analysis instrument ", this instrument is a bifocal path structure, can only carry out the single wavelength analysis, can not realize the component analysis of field condition rock and ore; ZL 96218361.X disclosed " near infrared petroleum composition analyser ", this instrument can not open-air directly test solid minerals based on the transmission principle design.The PIMA (Portable Infrared Mineral Analyzer) that Australia Integrated Spectronics Pty Ltd company produces is though instrument can carry out the Field Mineral analysis; but this instrument internal adopts the crown design of hemisphere; the sample port design is in the side of instrument; regular meeting made sample distribution inhomogeneous when powdered sample side level was thrown in; test is inconvenient, needs sensor is carried out process of refrigerastion the testing cost height before the measurement; the equipment price costliness is difficult to safeguard.
Summary of the invention:
The present invention aims to provide a kind of low price, and is easy to carry, do not need sample preparation, is suitable for composition and content analysis thereof that field condition carries out bulk or powder mineral samplers, and near-infrared spectrometers conveniently.
The utility model is realized in the following manner, optical system 1 comprises integrating sphere 11, light source 4, condenser lens 5 and photomodulator 6 and radome 7, integrating sphere 11 tops are provided with sample port 15, gold-plated thin plate 12 is housed outside the sample port 15, integrating sphere 11 inwalls are gold-plated, and around integrating sphere 11 inwall sample ports 15, post optical glass 14 and this place's ball wall is thinner than other place, be provided with light-emitting window 13 at middle part, integrating sphere 11 sides, be provided with slit 17 below the integrating sphere 11, integrating sphere 11 fuses by bolt and radome 7, catoptron 9 is housed in radome 7,10 and grating 8, be provided with into optical slits 16 in the side of radome 7, outside going into optical slits 16, photomodulator 6 is housed by support 24.
The present invention can also realize in the following manner, catoptron 9,10 center symmetries, and with grating 8, go into optical slits 16, slit 17 and light source 4 center design on same plane, light source 4, condenser lens 5, photomodulator 6, go into the center design of optical slits 16 and catoptron 9 on same horizontal line; Photomodulator 6 has comprised one with glazing dispenser 18 and an above direct current generator, light dispenser 18 is that equal angles is left at least 12 trapezoidal light mouths 19 of crossing on circular metal plate, light dispenser 18 is fixed on the rotation axis of direct current generator by pin, direct current generator drives light dispenser 18, makes incident light become the light of strong and weak alternate.
The invention has the beneficial effects as follows: low price, easy to carry, do not need sample preparation, do not need the sensor cooling is suitable for the component analysis that field condition carries out block or Powdered mineral samplers.
Description of drawings
Accompanying drawing 1 is the infrared mineralogical analysis instrument of a portable near side cutaway view
Accompanying drawing 2 is light dispenser structural representations
Accompanying drawing 3 is that the infrared mineralogical analysis instrument of portable near constitutes block diagram
Accompanying drawing 4 is that block diagram is gathered, handled to the infrared mineralogical analysis instrument of portable near
1. optical system, 2. signal acquiring system, 3. computer, 4. light source, 5. condenser lens, 6. photomodulator, 7. radome, 8. grating, 9,10. catoptron, 11. integrating spheres, 12. gold-plated thin plates, 13. light-emitting windows, 14. optical glass, 15. sample ports, 16. go into optical slits, 17. slits, 18. the light dispenser, 19. cross light mouth, 20. signal condition modules, 21. data acquisition modules, 22. centralized control unit, 23. sensors, 24,25 supports, 26 negatives.
Embodiment
The present invention is described in more detail below in conjunction with accompanying drawing.
Light source 4 is a tungsten halogen lamp, condenser lens 5 is made up of 3 convex lens, light source 4, photomodulator 6 are fixed on the support 25,24 by screw respectively, support 24,25 is welded on respectively on the negative 26, photomodulator 6 is near the outside of radome 7 side incident slits 16, and the center that guarantees the center of light source 4 and condenser lens 5 and photomodulator 6, radome 7 side incident slits 16, catoptron 9 is on same horizontal line; Catoptron 9 and 10 center symmetries, grating 8, catoptron 9,10 are fixed on the madial wall and inner bottom surface of radome 7 by screw, grating 8 is blazed gratings of 300 lines, it and catoptron 9,10, go into optical slits 16, slit 17 and light source 4 the center design on same surface level, make natural light be decomposed into the spectrum of arranging according to the order of sequence at different levels.Radome 7 can block extraneous parasitic light and dust enters optical system, should guarantee that the centre of sphere of integrating sphere 11 faces slit 17 when assembling.Photomodulator 6 is made up of light dispenser 18 and direct current generator, light dispenser 18 is that equal angles is left 12 trapezoidal light mouths 19 of crossing on circular metal plate, light dispenser 18 is fixed on the rotation axis of direct current generator by pin, direct current generator provides the instruction that drives photomodulator 6 according to centralized control unit 22, photomodulator 6 is the direct current generator driving light dispenser 18 of 12V by voltage, make 19 checkers of light mouth excessively on the light dispenser 18, make incident light be modulated to the light of the strong and weak alternate of 480Hz.Integrating sphere 11 is connected with radome 7 by bolt, and slit and radome 7 top slits are same slit 17 below the integrating sphere 11, and integrating sphere 11 tops are provided with sample port 15, and gold-plated thin plate 12 is housed outside the sample port 15, be used for system compensation, again it removed during specimen.Integrating sphere 11 inwalls are gold-plated, and within it wall sample port 15 around post optical glass 14, fall in the integrating sphere 11 to prevent dust, and thinner than other place at the ball wall that posts optical glass 14 places.Middle part, side at integrating sphere 11 is provided with light-emitting window 13, and sensor 23 is arranged in the light-emitting window 13, and two pins of sensor 23 are welded on the circuit board, and circuit board is fixed on integrating sphere 11 shells with screw.Sensor (18) is the PbS sensor, and sensor 23 links to each other with signal condition module 20 usefulness twisted-pair feeders, utilizes 20 pairs of signals of signal condition module to carry out Filtering Processing, obtains the higher dc signal of signal to noise ratio (S/N ratio).Dc signal is delivered to data acquisition module 21 by twisted-pair feeder, and data acquisition module 21 and centralized control unit 22 designs link to each other with computer 3 by connection on a circuit board.Centralized control unit 22 is to be the microcontroller of core with 89C2051, and it is responsible for the realization of instrument basic function.
The course of work of the present invention is to give light source 4 power supplies when power supply and make it luminous, after light sees through condenser lens 5 focusing, through photomodulator 6 modulation.Making incident light be modulated to hot spot behind the 480Hz sees through radome 7 side incident slits 16 and is radiated on the catoptron 9.Catoptron 9 has changed the direction of light, it is impinged upon on the grating 8,8 pairs of light of grating carry out beam split, at the light refraction that makes required wave band under the control of centralized control unit 22 to catoptron 10, after the light of the reflective mirror 10 reflection slit 17 by radome 7 tops enters integrating sphere 11, through optical glass 14, sample port 15 impinges upon on the sample, the near infrared light that sample completely reflects impinges upon on the sensor 23 through light-emitting window 13 through a part of light in integrating sphere 11 even backs, measure the near infrared ray light intensity of returning, change light intensity signal into electric signal by sensor 23 by the measured object surface diffuse reflectance.This electric signal has filtered noise after being handled by signal condition module 20, obtains the very high dc signal of signal to noise ratio (S/N ratio), and this electric signal changes digital signal into through data acquisition module 21, is sent to computer 3 by the PORT COM of centralized control unit 22.Can analyze the composition of sample and the content of each composition through computer 3 mathematics manipulation.When test powders or fluid sample, be placed on the sample port 15 and can test after can installing to sample in the sample cell, solid sample can be placed directly on the sample port.
Claims (3)
1. infrared mineralogical analysis instrument of portable near that is used for the mineralogical analysis of geologic examination field condition, be by optical system (1), signal acquiring system (2) and computer (3) are formed, it is characterized in that, optical system (1) comprises integrating sphere (11), light source (4), condenser lens (5) and photomodulator (6) and radome (7), integrating sphere (11) top is provided with sample port (15), the outer gold-plated thin plate (12) that is equipped with of sample port (15), integrating sphere (11) inwall is gold-plated, and post optical glass (14) on every side and this place's ball wall is thinner than other place at integrating sphere (11) inwall sample port (15), be provided with light-emitting window (13) at middle part, integrating sphere (11) side, be provided with slit (17) below the integrating sphere (11), integrating sphere (11) fuses by bolt and radome (7), in radome (7), catoptron (9 is housed, 10) and grating (8), be provided with into optical slits (16) in the side of radome (7), outside going into optical slits (16), photomodulator (6) be housed by support (24).
2. according to the infrared mineralogical analysis instrument of the said portable near of claim 1, it is characterized in that, catoptron (9), (10) center symmetry, and with grating (8), go into optical slits (16), slit (17) and light source (4) center design at grade, light source (4), condenser lens (5), photomodulator (6) are gone into the center of optical slits (16) and catoptron (9) and are designed on same horizontal line.
3. according to the infrared mineralogical analysis instrument of the said portable near of claim 1, it is characterized in that, photomodulator (6) has comprised one with glazing dispenser (18) and an above direct current generator, light dispenser (18) is that equal angles is left at least 12 trapezoidal light mouths (19) of crossing on circular metal plate, by pin light dispenser (18) is fixed on the rotation axis of direct current generator, direct current generator drives light dispenser (18), makes incident light become the light of strong and weak alternate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03127633 CN1206525C (en) | 2003-07-16 | 2003-07-16 | Portable type near infrared mineralogical analyser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03127633 CN1206525C (en) | 2003-07-16 | 2003-07-16 | Portable type near infrared mineralogical analyser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1480721A CN1480721A (en) | 2004-03-10 |
| CN1206525C true CN1206525C (en) | 2005-06-15 |
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ID=34153204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03127633 Expired - Fee Related CN1206525C (en) | 2003-07-16 | 2003-07-16 | Portable type near infrared mineralogical analyser |
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| Country | Link |
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| CN (1) | CN1206525C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008512672A (en) * | 2004-09-07 | 2008-04-24 | ペトロモデル・イーエイチエフ | Apparatus and method for analysis of size, shape, angularity of mineral and rock pieces, and composition analysis |
| WO2014080322A1 (en) * | 2012-11-20 | 2014-05-30 | Teknologian Tutkimuskeskus Vtt | An optical sampling apparatus and method for utilizing the sampling apparatus |
| CN103439266A (en) * | 2013-08-26 | 2013-12-11 | 广东省珠宝玉石及贵金属检测中心 | Identification and analysis system for jewelry jade and rock minerals |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN104374734A (en) * | 2014-09-30 | 2015-02-25 | 中国电子科技集团公司第四十一研究所 | PC104 bus-based high-performance near-infrared spectroscopy analysis device and method |
| CN104931455A (en) * | 2015-07-03 | 2015-09-23 | 北京凯元盛世科技发展有限责任公司 | On-line near-infrared spectrum analyzer |
| CN109738379A (en) * | 2019-01-22 | 2019-05-10 | 四川长虹电器股份有限公司 | A kind of miniature molecular spectrum identification device |
| CN109781622B (en) * | 2019-03-11 | 2024-02-02 | 南京信息工程大学 | Portable intelligent metal ore type quick distinguishing instrument |
-
2003
- 2003-07-16 CN CN 03127633 patent/CN1206525C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1480721A (en) | 2004-03-10 |
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