CN102109465A - Laser induced breakdown spectroscopy device for molten metal - Google Patents
Laser induced breakdown spectroscopy device for molten metal Download PDFInfo
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- CN102109465A CN102109465A CN2009102486738A CN200910248673A CN102109465A CN 102109465 A CN102109465 A CN 102109465A CN 2009102486738 A CN2009102486738 A CN 2009102486738A CN 200910248673 A CN200910248673 A CN 200910248673A CN 102109465 A CN102109465 A CN 102109465A
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Abstract
The invention provides a laser induced breakdown spectroscopy device for molten metal, belonging to the technical field of laser diagnosis and measurement, comprising a light source system, a light path system and a signal acquisition analysis system, wherein the laser from the light source forms a 45 DEG incident angle with a dichroscope of the light path system, and the light path system transmits the collected light signals to the signal acquisition analysis system for analyzing via the optical fiber. The device uses the laser to directly irradiate the molten metal to generate plasma, acquires and analyzes the light radiated by the plasma, and real-time monitors the component content of the molten metal so as to real-time guide smelting production processes based on the obtained analysis result. The device provided by the invention improves quality of products, reduces defect, lowers energy consumption, increases smelting frequency and production capacity, and prolongs service life of a furnace body.
Description
Technical field
The invention belongs to laser diagnostics and field of measuring technique, be specifically related to a kind of Laser-induced Breakdown Spectroscopy device that motlten metal is carried out real-time, online its component concentration of express-analysis.
Background technology
Set of number in State Statistics Bureau's report shows that China's industrial energy consumption accounts for about 70% of national primary energy consumption, and highly energy-consuming industries such as Ferrous Metallurgy, petrochemical complex, non-ferrous metal account for 69% of industrial total energy consumption.Compare with international most advanced level, these industry major product unit consumption of energy will exceed 40%.Particularly as energy consumption rich and influential family's metallurgy industry, its outsourcing energy expenditure accounts for 25% of Iron and Steel Production cost.The excessive China's metallurgical industry market competitiveness that has a strong impact on of energy consumption has become the big bottleneck that the metallurgical industry of restriction China develops.
Metallurgy industry adopts laboratory off-line measurement content of sample component at present, the constituent analysis of matallurgical products need be from a spot of liquid sample of sampling in the smelting furnace, after processing procedures such as cooling, curing, polishing, polishing, be transported to the on-the-spot sample analysis laboratory again and analyze.Usually smelting one heat steel needs 25-30 minute, and about 3-5 of component analysis time of matallurgical products minute, account for about 1/10 of the duration of heat analysis time.This off-line, discrete metallurgical analysis mode and smelting process seriously disconnect, and cause the interior product component prediction of stove untimely, and prolong the duration of heat, thereby waste a large amount of energy and starting material.Apparatus of the present invention are exactly a kind of on-line analysis device, are used to shorten the component analysis time, all great influence will be arranged for the raising of the production efficiency of metallurgy industry, the lifting of product quality, saving of the energy etc.
Summary of the invention
At the technical matters of above-mentioned existence, the invention provides a kind of Laser-induced Breakdown Spectroscopy device that is used for motlten metal, the motlten metal component concentration is measured the problem of off-line analysis to solve present metallurgy industry.
The technical solution used in the present invention is:
A kind of Laser-induced Breakdown Spectroscopy device that is used for motlten metal, comprise light-source system, light path system and signal processing and analysis system, the dichroic mirror shape incident angle at 45 of laser that light source sends and light path system, light path system is connected with the signal processing and analysis system by optical fiber.
Described light path system comprises dichroic mirror, two condenser lenses, optical fiber and two electronic control translation stages, described two condenser lenses and dichroic mirror are coaxial fixing, second condenser lens and optical fiber are separately fixed on two electronic control translation stages, second condenser lens is arranged in induction furnace crucible motlten metal top, and make its focus be arranged in the motlten metal liquid level, optical fiber is positioned at the focus place of first condenser lens, and be connected with the spectroscope of signal processing and analysis system, dichroic mirror is arranged between two condenser lenses, the ray cast of light source shape on dichroic mirror incident angle at 45, two electronic control translation stages are connected with the computing machine of signal processing and analysis system respectively.
Described signal processing and analysis system comprises spectroscope, photomultiplier, Sampling Integral device, oscillograph, photodiode and computing machine, spectroscope is connected with Sampling Integral device, oscillograph respectively by photomultiplier, the Sampling Integral device is connected with photodiode respectively with oscillograph, and oscillograph is connected with computing machine by the Sampling Integral device; Be connected with high-voltage power supply on the photomultiplier.
Described light source is the Nd:YAG laser instrument.
The invention has the beneficial effects as follows: the present invention utilizes laser direct irradiation motlten metal to produce plasma, then the light of plasma institute radiation is carried out collection analysis, the component concentration of real-time monitoring motlten metal can instruct the smelting production run in real time according to resulting analysis result.
Adopt two electronic control translation stages to control second condenser lens and fiber port respectively among the present invention, can adjust second condenser lens in real time and make its optimization to the distance of motlten metal liquid level, and the position of adjusting fiber port in real time makes the signal hot spot after first condenser lens focuses on just in time incide in the fiber port, dichroic mirror between two condenser lenses and laser incident direction are at 45, make the laser after the reflection converge to molten metal surface, thereby induce the generation plasma by condenser lens.
Utilize the present invention to improve the quality of products, reduce defective; Reduce energy resource consumption; Increase the melting number of turnover, improve production capacity; Prolong converter life.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein: 1. induction furnace, 2. digital oscilloscope, 3. Sampling Integral device (BOXCAR), 4. computing machine, 5. photodiode, 6. light source, 7. spectroscope, 8. photomultiplier (PMT), 9. high-voltage power supply (HV), 10. optical fiber, 11. first electronic control translation stages, 12. first condenser lenses, 13. dichroic mirror, 14. second condenser lens, 15. second electronic control translation stages, 16. crucibles.
Embodiment
Embodiment: as shown in Figure 1, the present invention includes light source 6, light path system and signal processing and analysis system, laser that light source sends and the dichroic mirror of light path system 13 shapes incident angle at 45, light path system is connected with the signal processing and analysis system by optical fiber, with the light signal collected by analyzing in the optical fiber 10 input signal acquisition analysis systems.
Light path system described in this example comprises dichroic mirror 13, two condenser lenses, optical fiber 10 and two electronic control translation stages, described two condenser lenses and dichroic mirror 13 are coaxial fixing, second condenser lens 14 and optical fiber 10 are separately fixed on two electronic control translation stages, first condenser lens 11 wherein, dichroic mirror 13 and light source 6 are separately fixed on the experiment table, second condenser lens 14 is arranged in induction furnace 1 crucible 16 motlten metals top, and be fixed on second electronic control translation stage 15, thereby make its distance that can regulate with the motlten metal liquid level reach optimum, optical fiber 10 is fixed on first electronic control translation stage 12, be positioned at the focus place of first condenser lens 11, make it can two-dimensional adjustment, thereby the signal hot spot that satisfies after first condenser lens 11 is assembled incides in optical fiber 10 ports fully, optical fiber 10 is connected with the spectroscope 7 of signal processing and analysis system, dichroic mirror 13 is fixed between two condenser lenses, the ray cast of light source 6 is shape incident angle at 45 on dichroic mirror 13, and two electronic control translation stages are connected with the computing machine 4 of signal processing and analysis system respectively.Two electronic control translation stages are respectively applied for the position of control second condenser lens 14 and optical fiber 10 ports, according to the position that the power of spectral signal moves second condenser lens 14 and optical fiber 10, make them be in best position.Utilize optical fiber 10 transmission signals light, can reduce the loss of light as far as possible, and mobility spectrum acquisition system eaily, restriction reduced to the space.
Described signal processing and analysis system comprises spectroscope 7, photomultiplier 8, Sampling Integral device 3, digital oscilloscope 2, photodiode 5 and computing machine 4, spectroscope 7 is connected with digital oscilloscope 2 with Sampling Integral device 3 respectively by photomultiplier 8, Sampling Integral device 3 is connected with photodiode 5 respectively with digital oscilloscope 2, and digital oscilloscope 2 is connected with computing machine 4 by Sampling Integral device 3; Be connected with high-voltage power supply 9 on the photomultiplier 8.Photomultiplier 8 is a kind of vacuum electronic tubing light-detecting devices with high sensitivity and ultrafast time response, and high-voltage power supply 9 is connected with photomultiplier 8 and is used for providing high pressure for it.Sampling Integral device 3 is connected with photomultiplier 8 respectively with digital oscilloscope 2, is used for the electric signal that photomultiplier 8 is detected is gathered.Photodiode 5 is used for triggered digital oscillograph 2 and Sampling Integral device 3, triggers Sampling Integral device 3 and digital oscilloscope 2 beginning acquired signal when receiving the signal that laser sends.Utilize Sampling Integral device 3 to carry out Sampling Integral, and can utilize the time-delay of Sampling Integral device 3 control acquired signal and the gate-width of acquired signal, make it reach best signal to noise ratio (S/N ratio) according to the time-resolved spectrum that shows on the digital oscilloscope 2 to the signal that collects.
This routine light source 6 adopts the Nd:YAG laser instrument, and the laser that laser instrument sends is used to excite motlten metal to produce plasma spectrometry, and selected wavelength is 1064nm, and pulsewidth is 8ns, and repetition frequency is 10Hz, and the maximum impulse energy is 200mJ.It is that the laser of 1064nm becomes 90 degree to reflex to the motlten metal liquid level that dichroic mirror 13 is used for wavelength, and the transmittance of other wave band that sends from laser plasma is gone out, and is fixed in the position at 45 with the laser incident direction.
The course of work of the present invention: the wavelength that laser instrument sends is after the laser of 1064nm reflects through dichroic mirror 13, converge to molten metal surface by second condenser lens 14, make the laser energy of sample surfaces reach breakdown threshold, thereby induce the generation plasma.The light of plasma institute radiation is by second condenser lens 14, and dichroic mirror 13 is crossed in transmission then, is focused in the port of optical fiber 10 by first condenser lens 11, according to the intensity of signal first condenser lens 11 is just in time converged to flashlight in optical fiber 10 ports.The light of plasma institute radiation passes in the spectroscope 7 through optical fiber 10, spectroscope 7 separates the light of incident by wavelength, by the photomultiplier 8 that is connected with spectroscope 7 light signal conversion place is become electric signal then, by Sampling Integral device 3 and the digital oscilloscope 2 that is connected respectively with photomultiplier 8, the electric signal that photomultiplier 8 is detected is gathered, the data transmission that Sampling Integral device 3 and digital oscilloscope 2 are collected is to computing machine 4, carry out Treatment Analysis by computing machine 4, obtain spectrum of laser plasma, according to the knowledge base that we had real-time element that demonstrates each spectral line representative and intensity, monitoring motlten metal component concentration that promptly can be real-time, starting material are increased and decreased during according to resulting fructufy reaches necessary requirement.
The present invention can regulate and control the position of second condenser lens 14 and optical fiber 10 ports according to the power of signal and the quality of signal to noise ratio (S/N ratio) according to concrete enforcement environment.
The present invention can be applicable to industries such as iron and steel smelting, aluminium, glass.
Claims (4)
1. Laser-induced Breakdown Spectroscopy device that is used for motlten metal, it is characterized in that: comprise light-source system, light path system and signal processing and analysis system, the dichroic mirror shape incident angle at 45 of laser that light source sends and light path system, light path system is connected with the signal processing and analysis system by optical fiber.
2. according to the described Laser-induced Breakdown Spectroscopy device that is used for motlten metal of claim 1, it is characterized in that: described light path system comprises dichroic mirror, two condenser lenses, optical fiber and two electronic control translation stages, described two condenser lenses and dichroic mirror are coaxial fixing, second condenser lens and optical fiber are separately fixed on two electronic control translation stages, second condenser lens is arranged in induction furnace crucible motlten metal top, and make its focus be arranged in the motlten metal liquid level, optical fiber is positioned at the focus place of first condenser lens, and be connected with the spectroscope of signal processing and analysis system, dichroic mirror is arranged between two condenser lenses, the ray cast of light source shape on dichroic mirror incident angle at 45, two electronic control translation stages are connected with the computing machine of signal processing and analysis system respectively.
3. according to the described Laser-induced Breakdown Spectroscopy device that is used for motlten metal of claim 1, it is characterized in that: described signal processing and analysis system comprises spectroscope, photomultiplier, Sampling Integral device, oscillograph, photodiode and computing machine, spectroscope is connected with Sampling Integral device, oscillograph respectively by photomultiplier, the Sampling Integral device is connected with photodiode respectively with oscillograph, and oscillograph is connected with computing machine by the Sampling Integral device; Be connected with high-voltage power supply on the photomultiplier.
4. according to the described Laser-induced Breakdown Spectroscopy device that is used for motlten metal of claim 1, it is characterized in that: described light source is the Nd:YAG laser instrument.
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| CN2009102486738A CN102109465A (en) | 2009-12-23 | 2009-12-23 | Laser induced breakdown spectroscopy device for molten metal |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901717A (en) * | 2012-06-12 | 2013-01-30 | 中国科学院安徽光学精密机械研究所 | Laser-induced breakdown spectroscopy-based portable handheld soil heavy mental detection device |
| CN103616351A (en) * | 2013-11-26 | 2014-03-05 | 中国科学院广州地球化学研究所 | Laser-induced breakdown spectroscopy analyzer and laser-induced breakdown spectroscopy analysis method |
| CN103969226A (en) * | 2014-05-14 | 2014-08-06 | 中国科学技术大学 | Laser-induced breakdown spectroscopy measurement system used in dusty and high-temperature environments and application |
| CN104374695A (en) * | 2013-08-14 | 2015-02-25 | 中国科学院沈阳自动化研究所 | Telescoping focusing collection system and method for LIBS remote detection |
| CN105510243A (en) * | 2015-12-31 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Spectral analysis device |
| CN105784682A (en) * | 2016-05-10 | 2016-07-20 | 中国科学院光电研究院 | Detection device and detection method by laser induced breakdown spectroscopy |
| CN106461560A (en) * | 2014-05-23 | 2017-02-22 | 原子能和替代能源委员会 | Device for analysing an oxidisable molten metal using a libs technique |
| CN108088813A (en) * | 2017-12-08 | 2018-05-29 | 中国科学院上海应用物理研究所 | The on-line measuring device of metallic element in a kind of fuse salt |
| CN109239056A (en) * | 2017-07-11 | 2019-01-18 | 中国科学院沈阳自动化研究所 | A kind of high-temp liquid ingredient on-line detection device and method |
| CN111266551A (en) * | 2020-02-04 | 2020-06-12 | 西安交通大学 | Semi-solid short-process intelligent manufacturing system and method for steel flat flange |
| CN113083799A (en) * | 2019-12-23 | 2021-07-09 | 中国科学院沈阳自动化研究所 | Laser cleaning system and method for detecting laser cleaning state and quality in real time |
| CN115615979A (en) * | 2022-11-03 | 2023-01-17 | 中国科学院沈阳自动化研究所 | Optical system and method for laser focusing and plasma emission light collection |
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2009
- 2009-12-23 CN CN2009102486738A patent/CN102109465A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901717B (en) * | 2012-06-12 | 2014-10-29 | 中国科学院安徽光学精密机械研究所 | Laser-induced breakdown spectroscopy-based portable handheld soil heavy mental detection device |
| CN102901717A (en) * | 2012-06-12 | 2013-01-30 | 中国科学院安徽光学精密机械研究所 | Laser-induced breakdown spectroscopy-based portable handheld soil heavy mental detection device |
| CN104374695A (en) * | 2013-08-14 | 2015-02-25 | 中国科学院沈阳自动化研究所 | Telescoping focusing collection system and method for LIBS remote detection |
| CN103616351A (en) * | 2013-11-26 | 2014-03-05 | 中国科学院广州地球化学研究所 | Laser-induced breakdown spectroscopy analyzer and laser-induced breakdown spectroscopy analysis method |
| CN103969226A (en) * | 2014-05-14 | 2014-08-06 | 中国科学技术大学 | Laser-induced breakdown spectroscopy measurement system used in dusty and high-temperature environments and application |
| CN106461560B (en) * | 2014-05-23 | 2019-05-10 | 原子能和替代能源委员会 | Equipment for using LIBS technology to analyze oxidable molten metal |
| CN106461560A (en) * | 2014-05-23 | 2017-02-22 | 原子能和替代能源委员会 | Device for analysing an oxidisable molten metal using a libs technique |
| CN105510243A (en) * | 2015-12-31 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Spectral analysis device |
| CN105784682A (en) * | 2016-05-10 | 2016-07-20 | 中国科学院光电研究院 | Detection device and detection method by laser induced breakdown spectroscopy |
| CN105784682B (en) * | 2016-05-10 | 2019-02-15 | 中国科学院光电研究院 | A kind of laser induced breakdown spectroscopy detection device and detection method |
| CN109239056A (en) * | 2017-07-11 | 2019-01-18 | 中国科学院沈阳自动化研究所 | A kind of high-temp liquid ingredient on-line detection device and method |
| CN108088813A (en) * | 2017-12-08 | 2018-05-29 | 中国科学院上海应用物理研究所 | The on-line measuring device of metallic element in a kind of fuse salt |
| CN108088813B (en) * | 2017-12-08 | 2021-06-18 | 中国科学院上海应用物理研究所 | On-line detection device for metal elements in molten salt |
| CN113083799A (en) * | 2019-12-23 | 2021-07-09 | 中国科学院沈阳自动化研究所 | Laser cleaning system and method for detecting laser cleaning state and quality in real time |
| CN111266551A (en) * | 2020-02-04 | 2020-06-12 | 西安交通大学 | Semi-solid short-process intelligent manufacturing system and method for steel flat flange |
| CN115615979A (en) * | 2022-11-03 | 2023-01-17 | 中国科学院沈阳自动化研究所 | Optical system and method for laser focusing and plasma emission light collection |
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Application publication date: 20110629 |