CN106153573B - A kind of high temperature and pressure optics cavity and its application method for absorption coefficient calibration - Google Patents
A kind of high temperature and pressure optics cavity and its application method for absorption coefficient calibration Download PDFInfo
- Publication number
- CN106153573B CN106153573B CN201610443242.7A CN201610443242A CN106153573B CN 106153573 B CN106153573 B CN 106153573B CN 201610443242 A CN201610443242 A CN 201610443242A CN 106153573 B CN106153573 B CN 106153573B
- Authority
- CN
- China
- Prior art keywords
- pressure
- high temperature
- gas
- gas chamber
- calibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 23
- 239000010980 sapphire Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000003595 spectral effect Effects 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229920006169 Perfluoroelastomer Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 35
- 239000012159 carrier gas Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 238000002329 infrared spectrum Methods 0.000 abstract description 8
- 238000001228 spectrum Methods 0.000 description 13
- 238000000862 absorption spectrum Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000003708 ampul Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N2021/3536—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis using modulation of pressure or density
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention discloses a kind of high temperature and pressure optics cavity for absorption coefficient calibration, it solves the problems, such as that near infrared spectrum calibration cannot be considered in terms of high temperature and high pressure, and the sealing leakage problem of middle infrared calibration, overcome existing calibration system that can not carry out the limitation that demarcate from the wide scope of low pressure, low temperature to high pressure, high temperature to close, middle infrared spectrum, develops, establishes a kind of broadband high temperature, low pressure to high pressure calibration system.The high temperature and pressure optics cavity includes fixed gas chamber, sapphire optical column, thin-wall steel tube, mountable cooling flange, supported flange, clamp nut, heating tape, sealing ring, pressure gauge, pressure vacuum gauge, gas supply/exhaust module.Additionally provide the application method of this high temperature and pressure optics cavity for absorption coefficient calibration.
Description
Technical field
The invention belongs to optical technical fields, more particularly to a kind of high temperature and pressure optics for absorption coefficient calibration
Chamber and its application method.
Background technique
Laser absorption spectrum measuring technique is built upon on the basis of accurate spectrum parameter.Most common molecular spectrum
Database HITRAN (high resolution transmission molecular absorption database) is base
In the spectrum parameter that quantum calculation obtains, by development in more than 40 years, which covered H2O,CO,CO2Deng 47 kinds points
Son.However, HITRAN database is there is also obvious deficiency, i.e. shortage high temperature spectrum parameter, L.S.Rothman et al. is organized thus
HITEMP spectra database is developed, but its molecular spectrum parameter still lacks enough experimental verifications, the accuracy of spectrum parameter
It is under suspicion, the complicated broadening mechanism especially under high temperature, high pressure influences, and actual measurement parameter has with HITRAN/HITEMP database
Difference.Therefore demarcating to spectrum parameter is needed, at the same time, the gas analyzer based on laser absorption spectrum is also required to
Measurement accuracy calibration under complex environment (high temperature and pressure).
According to wavelength band, the calibration of absorption spectrum can be divided near infrared absorption calibration and middle infrared absorption absorbs calibration,
Calibration system is more mature using quartz ampoule as calibration pond by near infrared band most, and the work of relevant spectrum calibration has big
The accumulation of amount.R.K.Hason group of Stanford University is to H2O carries out High temperature calibration in numerous spectral lines of near-infrared, including
X.Liu et al. is using silica cuvette and high temperature Muffle furnace to H near 1.4 μm2The a plurality of spectral line of O is demarcated, and with
2004 database of HITRAN is compared；C.S.Goldenstein et al. is to H near 2.4 μm2O Absorption Line is demarcated.
The greatest difficulty of these near-infrared calibration chambers based on quartz ampoule is can not to form hyperbaric environment, therefore be not used to high pressure absorption
Calibration.
In terms of wavelength, quartz has good permeability near infrared band, but its long wave cut-off wavelength is about 2.5 μ
M, it is impossible to be used in penetrate mid-infrared laser, therefore middle infrared calibration system needs to change optical window.In view of the good of sapphire glass
Infrared breathability and excellent high temperature resistant, high pressure resistant property in good, middle infrared absorption experiment at present and calibration experiment are mostly selected
Sapphire window is as translucent material.Foreign countries have precedent that can follow, J.Rice, S.Hahn in terms of middle infrared heat calibration experiment
Et al. sapphire-copper of development seal calibration system, however there are high temperature leakage problems for the system.G.B.Rieker etc. is above-mentioned
On the basis of, using new sealing means, i.e. sapphire both ends sealing (sealing of front end wedge shape copper backing, then hold copper backing sealing level with both hands)
Mode, partially solve the problems, such as under high temperature (900K) demarcate chamber gas leakage, but and it is immature, it is difficult to the light of centering infrared-gas
It composes constant and carries out accurate, prolonged rating test.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide and a kind of demarcates for absorption coefficient
High temperature and pressure optics cavity solves the problems, such as that near infrared spectrum calibration cannot be considered in terms of high temperature and high pressure and middle infrared calibration
Leakage problem is sealed, overcomes existing calibration system that can not carry out to close, middle infrared spectrum from low pressure, low temperature to high pressure, high temperature
The limitation of wide scope calibration develops, establishes a kind of broadband high temperature, low pressure to high pressure calibration system.
The technical solution of the invention is as follows: this high temperature and pressure optics cavity for absorption coefficient calibration, the high temperature are high
Press optics cavity include fixed gas chamber, sapphire optical column, thin-wall steel tube, mountable cooling flange, supported flange, clamp nut,
Heating tape, sealing ring, pressure gauge, pressure vacuum gauge, gas supply/exhaust module；
Fixed gas chamber includes inflating port and gas vent, is connect respectively with gas supply/exhaust module, is one section of circle in fixed gas chamber
Post holes, both ends and thin-wall steel tube vacuum welding seal；
Thin-wall steel tube is internally embedded sapphire optical column, one end of thin-wall steel tube and fixed gas chamber welded seal, the other end
It is welded with mountable cooling flange；
Sapphire optical column is fixed and sealed to mountable cooling flange；
Sealing ring includes big line footpath sealing ring and small line footpath sealing ring, and supported flange compresses big line footpath sealing ring, compresses spiral shell
Mother compresses small line footpath sealing ring；
Heating tape surrounds fixed gas chamber setting；
Gas supply/exhaust module includes high pressure gas cylinder and several control valves, high pressure gas cylinder, pressure gauge, pressure vacuum gauge
The inflating port of fixed gas chamber is connected to by control valve respectively, to be filled with the gas to be measured that concentration determines into fixed gas chamber
Body, vacuum pump are connected to the gas vent of fixed gas chamber by valve.
Additionally provide the application method of this high temperature and pressure optics cavity for absorption coefficient calibration, comprising the following steps:
(1) air tightness test is carried out to high temperature and pressure optics cavity and gas supply/exhaust module, respectively to low pressure, hyperbaric environment
Airtight test is carried out, guarantees that calibration system has good air-tightness；
(2) set temperature being heated to by heating tape, set temperature value carries out temperature control by relay and thermocouple,
Stablize thermocouple temperature measurement in gas chamber in set temperature, keeps dozens of minutes；
(3) fixed gas chamber is vacuumized using vacuum pump, vacuum degree maintains to stablize close to 0.1Pa；
(4) by gas supply/exhaust module, the gas for being gradually put into certain pressure enters fixed gas chamber, the pressure of fixed gas chamber
Power is obtained by pressure vacuum gauge；Make temperature, the pressure remained steady of gas chamber internal standard gas；
(5) spectral measurement is carried out using calibration system: by laser by gas chamber, after signal is received by a detector, by showing
The acquisition of wave device, obtains the spectral signal under one group of pressure, stable condition；Later, change the air chamber pressure and temperature of setting, successively
Carry out the spectral measurement under different pressures, different temperatures.
It includes inflating port and gas vent that the present invention, which passes through fixed gas chamber, is connect respectively with gas supply/exhaust module, fixed gas chamber
It is inside one section of cylindrical hole, both ends and thin-wall steel tube vacuum welding seal；Thin-wall steel tube is internally embedded sapphire optical column, Steel Thin-Wall
One end of pipe and fixed gas chamber welded seal, the other end and mountable cooling flange weld；Mountable cooling flange is fixed and close
Seal sapphire optical column；Sealing ring includes big line footpath sealing ring and small line footpath sealing ring, and supported flange compresses big line footpath sealing ring,
Clamp nut compresses small line footpath sealing ring；Heating tape surrounds fixed gas chamber setting；If gas supply/exhaust module include high pressure gas cylinder and
Dry control valve, high pressure gas cylinder, pressure gauge, pressure vacuum gauge pass through the inflation that control valve is connected to fixed gas chamber respectively
Mouthful, to be filled with the under test gas that concentration determines into fixed gas chamber, vacuum pump is connected to the deflation of fixed gas chamber by valve
Mouthful；To solve the problems, such as that near infrared spectrum calibration cannot be considered in terms of the sealing gas leakage of high temperature and high pressure and middle infrared calibration
Problem, overcome existing calibration system close, middle infrared spectrum can not be carried out from low pressure, low temperature to high pressure, high temperature wide scope mark
Fixed limitation develops, establishes a kind of broadband high temperature, low pressure to high pressure calibration system.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the high temperature and pressure optics cavity according to the present invention for absorption coefficient calibration.
Fig. 2 is the partial structural diagram of the high temperature and pressure optics cavity according to the present invention for absorption coefficient calibration.
Fig. 3 is the inflation/deflation schematic diagram of the high temperature and pressure optics cavity according to the present invention for absorption coefficient calibration.
Fig. 4 is the absorption spectrum constant calibration mistake of the high temperature and pressure optics cavity according to the present invention for absorption coefficient calibration
Journey schematic diagram.
Specific embodiment
As shown in Figure 1, 2, 3, this high temperature and pressure optics cavity for absorption coefficient calibration, the high temperature and pressure optics cavity packet
Include fixed gas chamber, sapphire optical column, thin-wall steel tube, mountable cooling flange, supported flange, clamp nut, heating tape, sealing
Circle, pressure gauge, pressure vacuum gauge, gas supply/exhaust module；
Fixed gas chamber includes inflating port and gas vent, is connect respectively with gas supply/exhaust module, is one section of circle in fixed gas chamber
Post holes, both ends and thin-wall steel tube vacuum welding seal；
Thin-wall steel tube is internally embedded sapphire optical column (for the laser through visible, near-infrared and middle infrared band),
One end of thin-wall steel tube and fixed gas chamber welded seal, the other end and mountable cooling flange weld；
Sapphire optical column is fixed and sealed to mountable cooling flange；In addition, the sealing ring due to use can be at high temperature
To melt, it is necessary to the temperature of the cooling flange of water makes it less than 200 DEG C, while protecting sealing ring, guarantees minimum thermal deformation,
Improve its sealing effect.
Supported flange: for compressing big line footpath (2.5mm) sealing ring, guarantee under low pressure, condition of high voltage, calibration system tool
There is good leakproofness；
Clamp nut: the sealing ring of small line footpath is compressed, while improving sealability, sapphire is compressed into gas chamber
Optical column resists the gas pressure under high pressure；
Sealing ring includes big line footpath sealing ring and small line footpath sealing ring, and supported flange compresses big line footpath sealing ring, compresses spiral shell
Mother compresses small line footpath sealing ring；
Heating tape surrounds fixed gas chamber setting；
Gas supply/exhaust module includes high pressure gas cylinder and several control valves, high pressure gas cylinder, pressure gauge, pressure vacuum gauge
(pressure measurement when for low pressure spectrum calibration) is connected to the inflating port of fixed gas chamber by control valve respectively, thus to solid
Determine to be filled with the under test gas that concentration determines in gas chamber, vacuum pump (vacuumizing calibration chamber, minimum pressure is smaller than 1Pa) passes through valve
Door is connected to the gas vent of fixed gas chamber.
In addition, the high temperature and pressure optics cavity is also connect with calibration system, the calibration system includes that signal generator (generates
Sawtooth signal carries out wavelength and intensity modulated to laser controller), laser controller is (for controlling the work of laser
Temperature and operating current carry out fast modulation to the output wavelength of laser according to the signal of signal generator in test), swash
Light device (the middle infrared absorption spectrum of output laser, the characteristic absorpting spectrum of the wave-length coverage coverage goal component of laser, such as CO2
Near 4.3um, the middle infrared absorption of CO is composed near 4.6um, and the output power of laser is generally in several mW magnitudes), it is quasi-
(laser (15) output laser has the biggish angle of divergence to straight lens mostly, needs to collimate it, remote to obtain preferable space
Range transmission properties, the hot spot after collimation are typically about 1~2mm diameter), photodetector (receives across optical calibrating chamber
Light intensity signal is converted to voltage signal by transmitted light), the oscillograph voltage signal of output (acquisition and recording detector (18))；
Current-modulation is carried out to laser controller (14) using signal generator, modulated current signal drives laser
(15), the laser in laser output particular range of wavelengths, collimated lens (17) collimation pass through high temperature and pressure optics cavity later
Sapphire optical column (2) enter fixed gas chamber, after being absorbed by the under test gas that concentration, temperature, pressure determine, light intensity attenuation,
Sapphire optical column (2) across right side is received by photodetector (18), is acquired and is obtained by oscillograph (19).
In addition, the laser (15) is equipped with cooling system (16).Laser internal element is cooled down, guarantees laser
Device (15) is normal, steady operation.
In addition, the fixed gas chamber is stainless steel gas chamber.
In addition, the thin-wall steel tube is the stainless-steel pipe (304 steel pipe) that wall thickness is 0.5mm.
In addition, the heating tape is additionally provided with relay and thermocouple, to carry out temperature control and holding.
In addition, the big line footpath sealing ring and small line footpath sealing ring are perfluoroelastomer sealing ring, line footpath is respectively 2.5mm
And 1.5mm.
In addition, the useful range of the pressure gauge: 0.1-2MPa, precision: ± 0.5%；The pressure vacuum gauge includes two
Group vacuum meter, useful range are respectively as follows: 0.1-100Torr, 1-1000Torr.
In addition, gas is O in the high pressure gas cylinder2, CO, CO2, one of NO, and utilize N2Or Ar gas is carried as balance
Gas.
As shown in figure 4, the application method of this high temperature and pressure optics cavity for absorption coefficient calibration is additionally provided, including
Following steps:
(1) air tightness test is carried out to high temperature and pressure optics cavity and gas supply/exhaust module, respectively to low pressure, hyperbaric environment
Airtight test is carried out, guarantees that calibration system has good air-tightness；
(2) set temperature being heated to by heating tape, set temperature value carries out temperature control by relay and thermocouple,
Stablize thermocouple temperature measurement in gas chamber in set temperature, keeps dozens of minutes；
(3) fixed gas chamber is vacuumized using vacuum pump, vacuum degree maintains to stablize close to 0.1Pa；
(4) by gas supply/exhaust module, the gas for being gradually put into certain pressure enters fixed gas chamber, the pressure of fixed gas chamber
Power is obtained by pressure vacuum gauge；Make temperature, the pressure remained steady of gas chamber internal standard gas；
(5) spectral measurement is carried out using calibration system: by laser by gas chamber, after signal is received by a detector, by showing
The acquisition of wave device, obtains the spectral signal under one group of pressure, stable condition；Later, change the air chamber pressure and temperature of setting, successively
Carry out the spectral measurement under different pressures, different temperatures.
It includes inflating port and gas vent that the present invention, which passes through fixed gas chamber, is connect respectively with gas supply/exhaust module, fixed gas chamber
It is inside one section of cylindrical hole, both ends and thin-wall steel tube vacuum welding seal；Thin-wall steel tube is internally embedded sapphire optical column, Steel Thin-Wall
One end of pipe and fixed gas chamber welded seal, the other end and mountable cooling flange weld；Mountable cooling flange is fixed and close
Seal sapphire optical column；Sealing ring includes big line footpath sealing ring and small line footpath sealing ring, and supported flange compresses big line footpath sealing ring,
Clamp nut compresses small line footpath sealing ring；Heating tape surrounds fixed gas chamber setting；If gas supply/exhaust module include high pressure gas cylinder and
Dry control valve, high pressure gas cylinder, pressure gauge, pressure vacuum gauge pass through the inflation that control valve is connected to fixed gas chamber respectively
Mouthful, to be filled with the under test gas that concentration determines into fixed gas chamber, vacuum pump is connected to the deflation of fixed gas chamber by valve
Mouthful；To solve the problems, such as that near infrared spectrum calibration cannot be considered in terms of the sealing gas leakage of high temperature and high pressure and middle infrared calibration
Problem, overcome existing calibration system close, middle infrared spectrum can not be carried out from low pressure, low temperature to high pressure, high temperature wide scope mark
Fixed limitation develops, establishes a kind of broadband high temperature, low pressure to high pressure calibration system.In temperature range: room temperature-
1000K, pressure limit: under the conditions of 1Torr-1MPa, which has good sealing effect.It can be simultaneously suitable for low pressure
Spectral line line style under spectrum parameter calibration and high pressure widens parameter calibration, can get accurate spectrum parameter, while can simulate
A variety of high temperature, high-pressure combustion environment carry out spectral absorption simulation, the measurement accuracy for validated measurement systems
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, it is all according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, still belong to the present invention
The protection scope of technical solution.
Claims (10)
1. a kind of high temperature and pressure optics cavity for absorption coefficient calibration, it is characterised in that: the high temperature and pressure optics cavity includes solid
Determine gas chamber (1), sapphire optical column (2), thin-wall steel tube (3), mountable cooling flange (4), supported flange (5), clamp nut
(6), heating tape (7), sealing ring (8), pressure gauge (9), pressure vacuum gauge (10), gas supply/exhaust module；
Fixed gas chamber includes inflating port and gas vent, is connect respectively with gas supply/exhaust module, is one section of cylinder in fixed gas chamber
Hole, both ends and thin-wall steel tube vacuum welding seal；
Thin-wall steel tube is internally embedded sapphire optical column, one end of thin-wall steel tube and fixed gas chamber welded seal, the other end with can
Cooling flange welding is installed；
Sapphire optical column is fixed and sealed to mountable cooling flange；
Sealing ring includes big line footpath sealing ring and small line footpath sealing ring, and supported flange compresses big line footpath sealing ring, for mountable
Sapphire optical column is fixed and sealed to cooling flange, and clamp nut compresses small line footpath sealing ring, blue precious for compressing into gas chamber
Stone optical column resists the gas pressure under high pressure；
Heating tape surrounds fixed gas chamber setting；
Gas supply/exhaust module includes high pressure gas cylinder (12) and several control valves, high pressure gas cylinder, pressure gauge, pressure vacuum gauge
The inflating port of fixed gas chamber is connected to by control valve respectively, to be filled with the gas to be measured that concentration determines into fixed gas chamber
Body, vacuum pump (11) are connected to the gas vent of fixed gas chamber by valve.
2. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the high temperature is high
Pressure optics cavity is also connect with calibration system, and the calibration system includes signal generator (13), laser controller (14), laser
(15), collimation lens (17), photodetector (18), oscillograph (19)；
Current-modulation is carried out to laser controller (14) using signal generator (13), modulated current signal drives laser
(15), the laser in laser output particular range of wavelengths, collimated lens (17) collimation pass through high temperature and pressure optics cavity later
Sapphire optical column (2) enter fixed gas chamber, after being absorbed by the under test gas that concentration, temperature, pressure determine, light intensity attenuation,
Sapphire optical column (2) across right side is received by photodetector (18), is acquired and is obtained by oscillograph (19).
3. the high temperature and pressure optics cavity according to claim 2 for absorption coefficient calibration, it is characterised in that: the laser
Device (15) is equipped with cooling system (16).
4. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the fixation
Gas chamber is stainless steel gas chamber.
5. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the thin-walled
Steel pipe is the stainless-steel pipe that wall thickness is 0.5mm.
6. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the heating
Band is additionally provided with relay and thermocouple, to carry out temperature control and holding.
7. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the big line
Diameter sealing ring and small line footpath sealing ring are perfluoroelastomer sealing ring, and line footpath is respectively 2.5mm and 1.5mm.
8. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the pressure
The useful range of table: 0.1-2MPa, precision: ± 0.5%；The pressure vacuum gauge includes two groups of vacuum meters, useful range point
Not are as follows: 0.1-100Torr, 1-1000Torr.
9. the high temperature and pressure optics cavity according to claim 1 for absorption coefficient calibration, it is characterised in that: the high pressure
Gas is O in gas cylinder2, CO, CO2, one of NO, and utilize N2Or Ar gas is as balance carrier gas.
10. a kind of application method of the high temperature and pressure optics cavity according to claim 2 for absorption coefficient calibration, special
Sign is: the following steps are included:
(1) air tightness test is carried out to high temperature and pressure optics cavity and gas supply/exhaust module, low pressure, hyperbaric environment is carried out respectively
Airtight test guarantees that calibration system has good air-tightness；
(2) set temperature is heated to by heating tape, set temperature value carries out temperature control by relay and thermocouple, makes gas
Indoor Thermal galvanic couple thermometric is stablized in set temperature, and dozens of minutes is kept；
(3) fixed gas chamber is vacuumized using vacuum pump, vacuum degree maintains to stablize close to 0.1Pa；
(4) by gas supply/exhaust module, the gas for being gradually put into certain pressure enters fixed gas chamber, and the pressure of fixed gas chamber is logical
Cross pressure vacuum gauge acquisition；Make temperature, the pressure remained steady of gas chamber internal standard gas；
(5) spectral measurement is carried out using calibration system: by laser by gas chamber, after signal is received by a detector, passing through oscillograph
Acquisition obtains the spectral signal under one group of pressure, stable condition；Later, the air chamber pressure and temperature for changing setting, successively carry out
Spectral measurement under different pressures, different temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610443242.7A CN106153573B (en) | 2016-06-20 | 2016-06-20 | A kind of high temperature and pressure optics cavity and its application method for absorption coefficient calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610443242.7A CN106153573B (en) | 2016-06-20 | 2016-06-20 | A kind of high temperature and pressure optics cavity and its application method for absorption coefficient calibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106153573A CN106153573A (en) | 2016-11-23 |
| CN106153573B true CN106153573B (en) | 2018-12-21 |
Family
ID=57353090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610443242.7A Expired - Fee Related CN106153573B (en) | 2016-06-20 | 2016-06-20 | A kind of high temperature and pressure optics cavity and its application method for absorption coefficient calibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106153573B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271049A (en) * | 2017-07-07 | 2017-10-20 | 中国科学院工程热物理研究所 | A kind of apparatus and method for measuring HTHP mixed gas radiation characteristic |
| CN107941751A (en) * | 2017-12-28 | 2018-04-20 | 南京科远自动化集团股份有限公司 | The laser sensing method and laser sensor arrangements of a kind of high temperature process furnances |
| CN108169235A (en) * | 2018-03-27 | 2018-06-15 | 合肥科晶材料技术有限公司 | A kind of original position optic test high temperature and pressure stove |
| CN108535216B (en) * | 2018-04-17 | 2019-11-26 | 中国计量科学研究院 | The instrument and method of a kind of gas concentration lwevel in measurement flue gas |
| CN111220294B (en) * | 2020-01-21 | 2021-07-16 | 中国科学院力学研究所 | TDLAS temperature calibration system and method based on three-section type tube furnace |
| CN111366263B (en) * | 2020-01-21 | 2021-03-02 | 中国科学院力学研究所 | High-temperature calibration equipment and method for TDLAS temperature measurement based on shock tube |
| CN114076638B (en) * | 2020-08-20 | 2023-10-13 | 北京振兴计量测试研究所 | High-temperature calibration method and equipment for threshold material |
| CN113154167A (en) * | 2021-05-13 | 2021-07-23 | 南京大学 | Closed air chamber, air pressure adjusting system and air pressure adjusting method thereof |
| CN113267468B (en) * | 2021-07-20 | 2021-09-24 | 中红外激光研究院(江苏)有限公司 | High-temperature high-pressure absorption cell device for molecular near-infrared absorption spectrum analysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5046854A (en) * | 1990-02-01 | 1991-09-10 | The Dow Chemical Company | Photometric cell and probe having windows fusion sealed to a metallic body |
| US6686594B2 (en) * | 2001-10-29 | 2004-02-03 | Air Products And Chemicals, Inc. | On-line UV-Visible light halogen gas analyzer for semiconductor processing effluent monitoring |
| EP1788378A1 (en) * | 2005-11-22 | 2007-05-23 | BP Chemicals Limited | Method & apparatus for spectroscopic analysis |
| CN101797634A (en) * | 2010-03-25 | 2010-08-11 | 清华大学 | Die-casting mold multi-point precise temperature control system and method |
-
2016
- 2016-06-20 CN CN201610443242.7A patent/CN106153573B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5046854A (en) * | 1990-02-01 | 1991-09-10 | The Dow Chemical Company | Photometric cell and probe having windows fusion sealed to a metallic body |
| US6686594B2 (en) * | 2001-10-29 | 2004-02-03 | Air Products And Chemicals, Inc. | On-line UV-Visible light halogen gas analyzer for semiconductor processing effluent monitoring |
| EP1788378A1 (en) * | 2005-11-22 | 2007-05-23 | BP Chemicals Limited | Method & apparatus for spectroscopic analysis |
| WO2007060398A1 (en) * | 2005-11-22 | 2007-05-31 | Bp Chemicals Limited | Method and apparatus for spectroscopic analysis |
| CN101797634A (en) * | 2010-03-25 | 2010-08-11 | 清华大学 | Die-casting mold multi-point precise temperature control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106153573A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106153573B (en) | A kind of high temperature and pressure optics cavity and its application method for absorption coefficient calibration | |
| CN105424631B (en) | A kind of hypersensitivity nitrogen oxides measuring system based on UV, visible light wave band absorption spectrum | |
| CN101290289B (en) | Ultraviolet differential flue gas concentration measuring systems calibration method | |
| CN206710305U (en) | A kind of in-situ type laser gas analyzer based on TDLAS technologies | |
| CN104280362A (en) | Online high-temperature water vapor laser spectrum detection system | |
| CN107167428A (en) | A kind of absorption cell detected for gas | |
| CN110146460A (en) | A kind of highly sensitive more gas concentration detection systems and control method with thermostatic control function | |
| CN104655601A (en) | OH free radical measurement calibration system by adopting fluorescence assay by gas expansion | |
| US9121793B2 (en) | Semi-open-path gas analysis systems and methods | |
| CN109444074B (en) | Laser spectrum absorption probe device with self-calibration function and measurement method thereof | |
| Ventrillard-Courtillot et al. | Incoherent broad-band cavity-enhanced absorption spectroscopy for simultaneous trace measurements of NO 2 and NO 3 with a LED source | |
| CN109655423A (en) | A kind of gas concentration analytical equipment and its measuring device and analysis method | |
| CN103411918B (en) | A kind of device of accurate measurement high-temperature gas spectrum parameter | |
| CN104316480B (en) | The laser in-situ detection system of oxygen concentration in a kind of arsenic-containing gold concentrate roaster | |
| CN107044958B (en) | A kind of measured oxygen concentration method of the measured oxygen concentration system based on ultraviolet broadband second level absorption spectrum | |
| CN108562550B (en) | Frequency-stabilized optical cavity ring-down spectrometer for absolute measurement of carbon isotope content in atmosphere | |
| CN115096840A (en) | Automatic zero calibration multi-gas sensor and automatic zero calibration method | |
| CN106124407A (en) | A kind of optical cavity, the aerosol extinction instrument with this optical cavity and the measuring method of Aerosol Extinction | |
| CN206479449U (en) | Optical gas absorbance pond and optical gas sensor | |
| CN207147951U (en) | A kind of absorption cell for gas detection | |
| CN101718695A (en) | Device for measuring temperature characteristics of fluorescent powder | |
| Vattulainen et al. | Experimental determination of SO2, C2H2, and O2 UV absorption cross sections at elevated temperatures and pressures | |
| CN210487587U (en) | Calibration device for gas laser absorption spectrum measurement | |
| CN201917519U (en) | On-site absorption spectrum gas analysis system | |
| CN108827906A (en) | A kind of near infrared spectrum multicomponent gas on-line detecting system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181221 Termination date: 20210620 |