CN105738348A - High-temperature-resistant immersion probe for laser-induced breakdown spectroscopy system - Google Patents
High-temperature-resistant immersion probe for laser-induced breakdown spectroscopy system Download PDFInfo
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- CN105738348A CN105738348A CN201610309397.1A CN201610309397A CN105738348A CN 105738348 A CN105738348 A CN 105738348A CN 201610309397 A CN201610309397 A CN 201610309397A CN 105738348 A CN105738348 A CN 105738348A
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- 239000000523 sample Substances 0.000 title claims abstract description 58
- 238000002536 laser-induced breakdown spectroscopy Methods 0.000 title claims abstract description 36
- 238000007654 immersion Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000000112 cooling gas Substances 0.000 claims description 32
- 239000007789 gas Substances 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N21/8507—Probe photometers, i.e. with optical measuring part dipped into fluid sample
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a high-temperature-resistant immersion probe for a laser-induced breakdown spectroscopy system. The high-temperature-resistant immersion probe comprises a high-temperature-resistant pipe (6), a high-temperature-resistant pipe sleeve (7), a high-temperature-resistant pipe heat insulation pad (8), an external heat insulation layer (9), a middle protection pipe (11), a sealing sheet, a lens barrel, a rear end box body (20), a temperature sensor (14), an air pressure sensor (16), an air inlet (23), an air outlet (12) and a lead screw drive system (21). The high-temperature-resistant immersion probe has a function of automatically and precisely controlling the temperature of a multilayer temperature control cavity in a high temperature environment and can guarantee stable parameters of an optical element in the probe. By the adoption of a coarse-fine combination two-stage servo control system consisting of a laser distance measurer, a laser-induced breakdown spectroscopy signal and a precision lead screw, quick and accurate positioning required by measurement is realized, the working time of the laser-induced breakdown spectroscopy system is shortened, and burdens on a laser device and a signal processing unit are relieved.
Description
Technical Field
The invention relates to the field of online component analysis of molten metal, in particular to a high-temperature resistant immersion probe with automatic temperature control and automatic positioning functions for a laser-induced breakdown spectroscopy component measuring system.
Background
For example, chinese patent CN101183074A describes a set of molten steel component detecting and analyzing device, in which a high temperature resistant immersion probe is automatically positioned by contacting electrodes with molten steel and electrifying, an optical element of the probe is cooled by air cooling, a signal box is thermostated by a thermostat, and is positioned by lifting a mechanical arm, a housing of the probe is a high temperature resistant metal cylinder, and the exterior of the probe is coated with a high reflection high temperature resistant material. The invention has the advantages of non-consumption, and the automatic positioning function can not be repeatedly carried out except for the first time because of the short circuit of the residual molten steel or steel slag after the electrode is actually contacted with the molten steel, and the mode of the residual molten steel or steel slag is not mentioned. The invention has cooling function for the probe optical element, but no temperature sensor is arranged at the position, so that the environment temperature of the optical element cannot be controlled, and the working characteristic of the optical element cannot be kept stable.
Chinese patent CN201266163Y also describes a set of online detector for molten steel quality based on laser spark spectroscopy, wherein the front end of the high temperature resistant probe is made of alumina ceramics, the cooling system is made of water cooling and air cooling, the cooling gas is argon, the probe is lifted by a pulley block, the probe is immersed from high to the lowest position to collect signals, the best signal position is judged and then returned to the best signal position to collect signals, the signal processing box body adopts a constant temperature device to keep constant temperature, the front end probe is only cooled, and no constant temperature measure is mentioned for the optical element. The invention is provided with a water cooling pipeline, so that the risk of polluting molten steel by water leakage and splashing of the molten steel exists, meanwhile, an automatic distance measuring system does not exist in a probe lifting system, whether the probe enters an optimal signal position is judged directly through a signal processing unit, the depth of the probe immersed in the molten steel cannot be automatically known, a safety interlocking mechanism cannot be formed to prevent the probe from working abnormally, a laser-induced breakdown spectrum composition measuring system can work for a long time, and a laser and the signal processing unit have large burden.
Disclosure of Invention
The invention overcomes the problem that the prior art lacks a high-temperature-resistant probe which is designed for matching a laser-induced breakdown spectroscopy device for an atmospheric metallurgical furnace, and realizes the automatic temperature control of a multilayer cavity in the probe and the automatic coarse-fine two-level positioning function combining rapid displacement and accurate positioning.
The technical scheme adopted by the invention is as follows: a high temperature resistant immersion probe for a laser induced breakdown spectroscopy system comprising: the device comprises a high-temperature-resistant pipe, a high-temperature-resistant pipe sleeve, a high-temperature-resistant pipe heat-insulating gasket, an external heat-insulating layer, a middle protection pipe, a mouth-tying piece, a lens cone, a rear-end box body, a temperature sensor, an air pressure sensor, an air inlet, an air outlet and a lead screw transmission system; wherein,
the high temperature resistant pipe is responsible for penetrating through the slag layer and immersing into the high temperature melt, and the high temperature melt enters the high temperature resistant pipe to reach a certain height; the high-temperature resistant pipe is sleeved and used for clamping the high-temperature resistant pipe, and the upper part of the high-temperature resistant pipe is provided with a high-temperature resistant pipe heat insulation gasket for preventing the high-temperature resistant pipe from conducting and transferring heat to the middle protection pipe; the external heat insulation layer is used for reducing and slowing down the radiation heat transfer of the surface of the external high-temperature melt to the middle protection tube, and the middle protection tube is integrally isolated from the high-temperature melt by combining the external heat insulation layer and the high-temperature resistant tube heat insulation gasket; the middle protection tube is used for supporting the whole probe structure and is provided with a cooling gas outlet; the inner hole beam port of the double beam port sheets is used for reducing the radiation heat transfer of the surface of a melt inside the high-temperature resistant pipe to the lens cone, the inner cavity of the middle protective pipe is divided into three layers of temperature control chambers with air pressure and temperature by the two beam port sheets with different inner diameters, each layer of cavity is provided with a plurality of air outlets and air outlet electronic valves, and the air outlets can be controlled by the air outlet electronic valves so as to adjust the air pressure and the air outlet flow of each cavity; the lens barrel is used for clamping a lens of the laser-induced breakdown spectroscopy system, and a fine adjustment device is designed for fine adjustment during lens assembly, wherein a laser inlet of incident laser and an outlet of signal laser can be interchanged as required; the rear-end box body is used for loading pipeline circuits such as a sensor cable, a laser-induced breakdown spectroscopy system signal transmission part, a cooling gas access pipeline and the like, and a control panel for controlling the front-end probe; the sensor mounting seat is used for mounting a temperature sensor and an air pressure sensor, and the temperature sensor and the air pressure sensor are respectively used for detecting the temperature and the air pressure state at the probe lens barrel; the laser range finder is responsible for measuring the distance between the probe and the surface of the high-temperature melt, so that the probe can rapidly enter the working range of the laser-induced breakdown spectroscopy system, the laser-induced breakdown spectroscopy system can be closed in the period so as to reduce the data volume to be processed by the signal processing unit of the laser-induced breakdown spectroscopy system, and whether the probe is at a dangerous depth or not can be deduced according to the measured distance so as to ensure the working safety of the probe; the screw transmission system comprises a screw and a servo motor and is used for carrying out large-range rapid descending before entering a signal excitation range and carrying out position fine adjustment when the laser-induced breakdown spectroscopy system searches for an optimal signal.
The cooling gas is low-temperature argon, so that the components of the melt are protected from being oxidized by air, smoke generated on the surface of the high-temperature melt is taken away, the absorption rate of the argon to optical signals is lower than that of other cooling gases, the strength of the optical signals is improved, the whole pipe body structure forms a cooling gas loop, the cooling gas enters from a gas supply device through a pipe through a box body and then passes through a gas inlet arranged on the sensor mounting seat, and the cooling gas flows out from a gas outlet arranged on the middle protection pipe; the gas supply device is provided with a gas pressure valve and a mass flow control valve, and can monitor and control the pressure and the flow of the cooling gas according to a flow-temperature closed-loop automatic control model.
The invention has the advantages and positive effects that:
(1) the temperature control device has the function of automatically and accurately controlling the temperature of the multilayer temperature control cavity in a high-temperature environment, and can ensure the stable parameters of optical elements in the probe.
(2) The invention adopts a coarse-fine combined two-stage servo control system consisting of laser ranging, laser induced breakdown spectroscopy signals and a precise lead screw, realizes the quick and accurate positioning of the measurement requirement, reduces the working time of the laser induced breakdown spectroscopy system, and lightens the burden of a laser and a signal processing unit.
(3) The front end of the invention has simple and reliable structure, the temperature control purpose is achieved by adopting gas cooling and a heat insulation layer, the problem of liquid leakage in liquid cooling is avoided, the size of a high-temperature resistant immersion probe is also reduced, and the invention is convenient for field use and maintenance of the metallurgical industry.
Drawings
FIG. 1 is a schematic diagram of the operation of a high temperature resistant immersion probe for a laser induced breakdown spectroscopy system according to the present disclosure. The broken line with the break-angle tip represents the advancing direction of the optical path; the arrow cluster is the direction of cooling airflow, and the arrow direction is the front; the solid line with the break angle point is the light path of the laser range finder, and the break angle point represents the advancing direction of the light path.
FIG. 2 is a schematic diagram of the operation of the high temperature resistant immersion probe for laser induced breakdown spectroscopy system in cooperation with the cooling system gas supply device and the laser induced breakdown spectroscopy system.
FIG. 3 is a schematic diagram of a possible structure of a high temperature resistant immersion probe for a laser induced breakdown spectroscopy system according to the present disclosure.
Fig. 1 and 2 share numbering, wherein: 1. an intermediate frequency furnace body, 2, a high-temperature melt, 3, a slag layer, 4, a laser ranging target position, 5, an incident laser focusing point, 6, a high-temperature resistant pipe, 7, a high-temperature resistant pipe sleeve, 8, a high-temperature resistant pipe heat insulation gasket, 9, an external heat insulation layer, 10, a lower beam port sheet, 11, an intermediate protection pipe, 12, an air outlet, 13, an upper beam port sheet, 14, a temperature sensor, 15, a focusing lens, 16, an air pressure sensor, 17, a dichroic mirror, 18, a vertical lens barrel, 19, a lens barrel mounting seat, 20, a rear end box body, 21, a lead screw transmission system, 22, a laser range finder, 23, an air inlet, 24, a laser inlet, 25, a sensor mounting seat, 26, a transverse lens barrel, 27, a collecting lens, 28, an optical fiber connecting seat, 29, an air outlet electronic valve, 30, a probe bracket, 31, a cooling gas supply source, 32, an air pressure valve, 34. the laser induced breakdown spectroscopy system comprises an integrated box body of a laser induced breakdown spectroscopy system, 35 incident laser light guide arms, 36 and signal light emergent optical fibers.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention provides a high-temperature resistant immersion probe for a laser-induced breakdown spectroscopy system, which is shown in a schematic diagram in fig. 1 and 2. The high temperature resistant pipe 6 is responsible for penetrating through the slag layer 3 and immersing into the high temperature melt 2; the high-temperature-resistant pipe sleeve 7 is used for clamping the high-temperature-resistant pipe 6; the heat insulation sheet 8 is used for preventing the high temperature resistant pipe 6 from conducting and transferring heat to the middle protection pipe 11; the external heat insulation layer 9 is responsible for blocking the radiation heat transfer of the surface of the external melt 2 to the protection tube 11; the protection tube 11 is used for supporting the whole probe structure and is provided with a plurality of cooling gas outlets 12; the lower beam opening sheet 10 and the upper beam opening sheet 13 are used for reducing the radiation heat transfer of the surface of the high-temperature melt 2 to the vertical lens barrel 18; the vertical lens barrel 18 is used for clamping the dichroic mirror 17 and the focusing lens 15 of the laser-induced breakdown spectroscopy system; the rear-end box body 20 is used for loading a laser range finder 22 and a cooling gas input optical path and is connected with a lead screw transmission system 21; the sensor mount 25 is used to provide a sensor mounting location and has a cooling gas inlet 23 and a reserved laser inlet 24. The cooling gas is generated by a cooling gas supply source 31, and is introduced into the probe through a pipe after the gas pressure and flow rate are adjusted by a gas pressure valve 32 and a mass flow controller 33. The whole tube structure forms a cooling gas loop, which flows in from a cooling gas inlet 23 and flows out from a cooling gas outlet 12, so that the temperature of the whole immersion probe, especially the temperature of the vertical lens barrel 18, is reduced. The cooling gas is low-temperature argon gas, protects the components of the melt 2 from being influenced by air oxidation, takes away smoke generated on the surface of the high-temperature melt 2, and protects optical elements in the vertical lens barrel 18 and the transverse lens barrel 26, namely the dichroic mirror 17, the focusing lens 15 and the collecting lens 27; the laser distance measuring instrument 22 is used for measuring the distance from the laser distance measuring instrument 22 to the surface of the high-temperature melt 2 or the slag layer 3; the lead screw transmission system 21 is responsible for lifting the whole probe. The laser induced breakdown spectroscopy system integration box 34 is responsible for excitation and collection of signal light, wherein incident laser for excitation is connected to the laser inlet 24 reserved for the probe through the incident laser light guide arm 35, and emergent signal light is introduced into the integration box 34 through the probe optical fiber seat 28 and the signal light emergent optical fiber 36.
The working process of the invention is as follows: the probe carriage 30 is pushed to the measuring position as required. The cooling gas supply 31 is first opened and the inlet valve 32, mass flow controller 33 and outlet electrovalve 29 are opened and cooling gas is introduced and all air is evacuated. Because the slag layer 3 in the intermediate frequency furnace is a 3-5 cm hard shell, an opening slightly larger than the high-temperature-resistant pipe 6 is opened on the slag layer 3 by using a slag breaking tool, and the laser of the laser range finder 22 can reach the surface of a melt, namely the laser ranging target position 4. Collecting data of a laser range finder 22, controlling a lead screw transmission system 21 to quickly reduce the height of the probe, penetrating a high-temperature resistant pipe 6 at the front end of the probe through a slag layer 3, immersing a high-temperature melt 2 and enabling the high-temperature melt 2 to enter an inner cavity of the high-temperature resistant pipe 6. At this time, the cooling gas is adjusted to keep the inner cavity at least at a certain pressure, and the lead screw transmission system 21 is controlled to slowly enter the working range of the laser-induced breakdown spectroscopy system. After the working range is entered, according to the feedback of the temperature sensor 14 and the air pressure sensor 16, the cooling gas inlet air pressure valve 32 and the mass flow controller 33 are controlled according to the preset flow-temperature control curve, the flow and the pressure of the input cooling gas are adjusted, the air pressure in the cavity is adjusted by controlling the air outlet electronic valve 29, and the temperature stability at the temperature sensor 14 is ensured. And obtaining the optimal optical signal intensity position in the working range according to the optical signal intensity fed back by the laser-induced breakdown spectroscopy system 34. And controlling the lead screw transmission system 21 to enable the probe to be finely adjusted to the position with the optimal optical signal intensity, namely, the position of the incident laser focusing point 5, so as to obtain the required optical signal. And finally, keeping the supply of cooling gas, controlling a lead screw transmission system 21 to quickly lift the probe to leave the high-temperature melt 2, and standing the whole probe in a room-temperature environment for natural cooling or air cooling.
The invention does not comprise the design of a laser-induced breakdown spectroscopy system signal generation and signal acquisition system and a box body. The invention does not include the manufacturing process of the flow-temperature control model, and the flow-temperature control model can be completed according to the simulation result of a computer or the data of a sensor which is debugged and stabilized for many times on site as well as is known.
Claims (2)
1. A high temperature resistant immersion probe for laser induced breakdown spectroscopy system which characterized in that: the device comprises a high-temperature-resistant pipe (6), a high-temperature-resistant pipe sleeve (7), a high-temperature-resistant pipe heat-insulating gasket (8), an external heat-insulating layer (9), a middle protection pipe (11), a mouth-tying sheet, a lens barrel, a rear-end box body (20), a temperature sensor (14), an air pressure sensor (16), an air inlet (23), an air outlet (12) and a screw transmission system (21); wherein,
the high-temperature resistant pipe (6) is responsible for penetrating through the slag layer (3) and immersing into the high-temperature melt (2), and the high-temperature melt (2) enters the high-temperature resistant pipe (6) to reach a certain height; the high-temperature-resistant pipe sleeve (7) is used for clamping the high-temperature-resistant pipe (6), and the upper part of the high-temperature-resistant pipe sleeve is provided with a high-temperature-resistant pipe heat-insulating gasket (8) for preventing the high-temperature-resistant pipe (6) from conducting and transferring heat to the middle protection pipe (11); the external heat insulation layer (9) is responsible for reducing and slowing down the radiation heat transfer of the external high-temperature melt surface to the middle protection pipe (11), and the middle protection pipe (11) is integrally isolated from the high-temperature melt by combining the external heat insulation layer (9) and the high-temperature resistant pipe heat insulation gasket (8); the middle protection tube (11) is used for supporting the whole probe structure and is provided with a cooling gas outlet (12); the inner hole beam port of the double beam port sheets is used for reducing the radiation heat transfer of the melt surface inside the high-temperature resistant tube to the lens cone, the inner cavity of the middle protective tube is divided into three layers of temperature control chambers with air pressure and temperature by the two beam port sheets with different inner diameters, each layer of cavity is provided with a plurality of air outlets (12) and air outlet electronic valves (29), and the air outlet electronic valves (29) can control the sizes of the air outlets (12) so as to adjust the air pressure and the air outlet flow of each cavity; the lens cone is used for clamping a lens of the laser-induced breakdown spectroscopy system, and a fine adjustment device is designed for fine adjustment during lens assembly, wherein a laser inlet (24) of incident laser and an outlet of signal laser can be interchanged as required; the rear-end box body (20) is used for loading pipeline circuits such as a sensor cable, a laser-induced breakdown spectroscopy system signal transmission part, a cooling gas access pipeline and the like, and a control panel for controlling the front-end probe; the sensor mounting seat (25) is used for mounting a temperature sensor (14) and an air pressure sensor (16), and the temperature sensor (14) and the air pressure sensor (16) are used for detecting the temperature and the air pressure state at the probe lens barrel; the laser distance measuring instrument (22) is responsible for measuring the distance between the probe and the surface of the high-temperature melt (2), so that the probe can quickly enter the working range of the laser-induced breakdown spectroscopy system, the laser-induced breakdown spectroscopy system does not need to be started in the working range, the data volume to be processed by a signal processing unit of the laser-induced breakdown spectroscopy system is reduced, and whether the probe is at a dangerous depth or not can be inferred according to the measured distance so as to ensure the working safety of the probe; the screw transmission system (21) comprises a screw and a servo motor and is used for carrying out large-range rapid descending before entering a signal excitation range and carrying out position fine adjustment when the laser-induced breakdown spectroscopy system searches for an optimal signal.
2. A high temperature tolerant immersion probe for laser induced breakdown spectroscopy system as claimed in claim 1 wherein: the cooling gas is low-temperature argon, the components of the melt are protected from being oxidized by air, smoke generated on the surface of the high-temperature melt (2) is taken away, meanwhile, the absorption rate of the argon to optical signals is lower than that of other cooling gases, the optical signal intensity is improved, the whole pipe body structure forms a cooling gas loop, the cooling gas enters from a gas supply device through a box body through a pipeline and then passes through a gas inlet (23) arranged on the sensor mounting seat, and flows out from a gas outlet (12) arranged on the middle protection pipe; the gas supply device is provided with a gas pressure valve (32) and a mass flow control valve (33), and can monitor and control the pressure and the flow of the cooling gas according to a flow-temperature closed-loop automatic control model.
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| CN201610309397.1A CN105738348B (en) | 2016-05-10 | 2016-05-10 | High temperature resistant immersion cell for LIBS system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610309397.1A CN105738348B (en) | 2016-05-10 | 2016-05-10 | High temperature resistant immersion cell for LIBS system |
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| CN105738348B CN105738348B (en) | 2018-04-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110763308A (en) * | 2019-12-02 | 2020-02-07 | 中信戴卡股份有限公司 | Liquid level measuring device, standing furnace and measuring and controlling method |
| CN111504469A (en) * | 2020-04-30 | 2020-08-07 | 衢州学院 | Black body cavity sensor supporting device |
| CN112557713A (en) * | 2020-12-08 | 2021-03-26 | 中国工程物理研究院激光聚变研究中心 | Laser-induced strong pulse current injection device |
| CN115468914A (en) * | 2022-11-11 | 2022-12-13 | 中国科学院沈阳自动化研究所 | Signal excitation and sampling probe for high-temperature melt composition analysis |
| EP4025900A4 (en) * | 2019-09-05 | 2023-12-27 | Schenck Process LLC | Laser-induced spectroscopy system and process |
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