CN211453346U - Portable Fourier transform infrared gas analyzer suitable for field complex environment - Google Patents
Portable Fourier transform infrared gas analyzer suitable for field complex environment Download PDFInfo
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- CN211453346U CN211453346U CN201922267770.3U CN201922267770U CN211453346U CN 211453346 U CN211453346 U CN 211453346U CN 201922267770 U CN201922267770 U CN 201922267770U CN 211453346 U CN211453346 U CN 211453346U
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Abstract
A portable fourier transform infrared gas analyzer adapted for field complex environments, comprising: light source subassembly, interface sealing washer subassembly one, cable assembly one, angle mirror type michelson interferometer and light path subassembly, power strip, cable assembly two, electric mainboard, interface sealing washer subassembly two, interface sealing washer subassembly three, gas chamber, battery, air pump, solenoid valve, wherein: the light source component comprises a collimating mirror, an infrared light source and a plane reflector III, the angle mirror type Michelson interferometer and the light path component comprise a light-transmitting window, a plane reflector I, a plane reflector II, a laser detector, a beam splitter, a plane reflector IV, a sealing window I, a sealing window II, an infrared detector, an ellipsoidal mirror, a parabolic mirror, a movable mirror, a fixed mirror and a laser, and the gas chamber comprises a sealing window III, a concave mirror I, a concave mirror II, a concave mirror III and a sealing window IV. The technical indexes and the environmental suitability of the utility model are superior to corresponding products abroad, and the utility model can be popularized and used in vast areas of China.
Description
Technical Field
The utility model relates to a gas analysis field particularly, relates to an infrared gas analysis appearance of portable Fourier transform who is fit for open-air complex environment.
Background
The Fourier Transform Infrared (FTIR) gas analyzer is one of the most ideal methods for detecting the concentration of gas at present, and has the advantages of high sensitivity, accurate wave number, good repeatability and wide application range. Compared with other detection technologies, the device has the advantages of simplicity and convenience in use, quickness in test, lightness, portability and the like, and is widely applied to environmental air pollution emergency monitoring.
At present, the Fourier transform infrared technology is utilized to carry out field gas detection, most of the Fourier transform infrared spectrometers in a vehicle laboratory are adopted, and a gas chamber sampling accessory is used for carrying out gas detection in a sample bin of the instrument.
The core of the Fourier transform infrared spectrometer is a Michelson interferometer which is influenced by external environments such as temperature, humidity and vibration, and the laboratory Fourier transform infrared spectrometer is designed based on a good laboratory environment, so that the laboratory Fourier transform infrared spectrometer cannot meet the complex working environment in the field.
At present, a commercialized portable fourier transform infrared gas analyzer is completely monopolized by a few foreign brands, optimizes a core michelson interferometer aiming at a field working environment, integrates and integrates an infrared light source, the interferometer, a gas chamber, a detector and a signal processing electronic component, and can be used in a portable mode without a vehicle.
The portable Fourier transform infrared gas analyzer has the advantages of wide territory, various landforms, complex climate and higher requirements on working conditions, and can not meet the application requirements under the complex field environment.
The absorption caused by water vapor and carbon dioxide in the light path environment of the gas analyzer results in a substantial reduction in the accuracy of the spectral data ultimately collected. The nitrogen purging and software post-processing can only overcome a part of adverse effects, but the problem is not solved fundamentally.
In addition, due to monopoly of foreign brands, the gas analyzer is very expensive and cannot be popularized and used in most areas of China. Therefore, the design and development of the commercialized portable Fourier infrared gas analyzer which has the independent intellectual property rights of China and is suitable for the field complex environment have important significance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a be fit for open-air complex environment's infrared gas analysis appearance of portable Fourier transform for overcome the not enough of above-mentioned prior art existence.
In order to achieve the above object, the utility model provides a be fit for open-air complex environment's portable Fourier transform infrared gas analyzer, it includes: light source subassembly, interface sealing washer subassembly one, cable assembly one, angle mirror type michelson interferometer and light path subassembly, power strip, cable assembly two, electric mainboard, interface sealing washer subassembly two, interface sealing washer subassembly three, gas chamber, battery, air pump, solenoid valve, wherein:
the light source component comprises a collimating mirror, an infrared light source and a plane reflecting mirror III,
the angle mirror type Michelson interferometer and the optical path component comprise a light-transmitting window, a first plane reflector, a second plane reflector, a laser detector, a beam splitter, a fourth plane reflector, a first sealing window, a second sealing window, an infrared detector, an ellipsoidal mirror, a parabolic mirror, a movable mirror, a fixed mirror and a laser,
the gas chamber comprises a sealing window sheet III, a concave mirror I, a concave mirror II, a concave mirror III and a sealing window sheet IV;
the light source assembly is used for generating an infrared radiation light source, the collimating mirror is used for reflecting light emitted by the infrared light source to form infrared parallel light and emitting the infrared parallel light to the third plane reflector, and the third plane reflector is used for turning the infrared parallel light emitted to the third plane reflector by 90 degrees and then emitting the infrared parallel light to the beam splitter;
the laser is used for generating laser beams and transmitting the laser beams to the light-transmitting window, the light-transmitting window is used for transmitting the laser beams, the first plane reflector is used for receiving the laser beams transmitted through the light-transmitting window, turning the laser beams by 90 degrees and then reflecting the laser beams to the second plane reflector, and the second plane reflector is used for receiving the laser beams reflected by the first plane reflector, turning the laser beams by 90 degrees and then reflecting the laser beams to the beam splitter;
the beam splitter is used for splitting the infrared parallel light emitted to the beam splitter into two beams, one beam is infrared reflected light I, the other beam is infrared transmitted light, the infrared reflected light I is emitted to the fixed mirror, and the infrared transmitted light is emitted to the movable mirror;
the fixed mirror is used for reflecting the infrared reflected light emitted by the beam splitter back to the beam splitter again to form infrared reflected light II;
the movable mirror is used for reflecting the infrared transmission light emitted by the beam splitter back to the beam splitter while the movable mirror moves to form infrared reflection light III;
the beam splitter is also used for receiving the infrared reflected light II of the fixed mirror and the infrared reflected light III of the movable mirror to form interference light and transmitting the interference light to the plane reflecting mirror IV;
the fixed mirror is also used for reflecting the laser reflected light emitted by the beam splitter back to the beam splitter again to form laser reflected light II;
the movable mirror is also used for reflecting the laser transmission light emitted by the beam splitter back to the beam splitter while the movable mirror moves to form laser reflection light III;
the beam splitter is also used for receiving the second laser reflection light of the fixed mirror and the third laser reflection light of the movable mirror, reflecting the second laser reflection light of the fixed mirror to form a fourth laser reflection light, and then transmitting the fourth laser reflection light to the laser detector;
the laser detector is used for receiving laser reflected light IV reflected by the beam splitter and laser transmitted light II transmitted by the beam splitter;
the movable mirror is fixedly connected with a linear guide rail, and the linear guide rail is connected with a voice coil motor;
the voice coil motor is used for driving the linear guide rail to move;
the plane reflector is used for transmitting interference light parallel light emitted by the beam splitter to turn 90 degrees and then emit to the parabolic mirror;
the parabolic mirror is used for reflecting the interference light reflected to the parabolic mirror from the plane reflector IV and then transmitting the interference light through the first sealing window sheet;
the sealing window sheet I is used for transmitting interference light reflected by the parabolic mirror;
the second sealing window sheet is used for transmitting interference light passing through the gas chamber;
the ellipsoidal mirror is used for converging the interference light emitted to the ellipsoidal mirror to the focus of the infrared detector;
a strip-shaped infrared beam splitting film is arranged along the diameter direction of the center of the beam splitter, laser beam splitting films are arranged on two sides of the strip-shaped infrared beam splitting film, the infrared beam splitting film is used for reflecting or transmitting infrared beams, and the laser beam splitting film is used for reflecting or transmitting laser beams;
the sealing window sheet III is used for transmitting the interference light transmitted by the sealing window sheet I;
the concave mirror I is used for circularly and repeatedly reflecting the interference light transmitted by the sealed window sheet III to the concave mirror III;
the concave mirror III is used for circularly and repeatedly reflecting the interference light emitted to the concave mirror I back to the concave mirror I, and circularly and repeatedly reflecting the interference light emitted to the concave mirror I to the concave mirror II;
the concave mirror II is used for circularly reflecting the interference light emitted to the concave mirror III back to the concave mirror III for multiple times, and transmitting the interference light emitted to the concave mirror III through a sealing window IV after being circularly reflected for multiple times;
the sealing window sheet four is used for transmitting the interference light emitted to the concave mirror two.
In an embodiment of the present invention, the collimator is a collimating parabolic mirror.
In an embodiment of the present invention, the laser is a 850nm temperature-controlled semiconductor laser. The laser beam splitting film is matched with a 850nm temperature control semiconductor laser, the beam splitter is a zinc selenide beam splitter,
in an embodiment of the present invention, the optical reflection surfaces of the collimating mirror, the first plane mirror, the third plane mirror, the ellipsoidal mirror, the parabolic mirror, the movable mirror, the fixed mirror, the first concave mirror, the second concave mirror and the third concave mirror are gold-plated optical reflection surfaces
In an embodiment of the present invention, the angle mirror type michelson interferometer and optical path module further includes: the sealing cavity, the first bottom plate and the upper cover;
the laser, the laser detector, the beam splitter, the fixed mirror, the movable mirror, the linear guide rail, the voice coil motor, the light-transmitting window sheet, the first plane reflector, the second plane reflector, the fourth plane reflector, the ellipsoidal mirror, the parabolic mirror and the infrared detector are all located below the upper cover and are fixedly connected to the first bottom plate, and the gas chamber is fixedly connected to the first bottom plate.
In an embodiment of the present invention, the outer wall of the sealing cavity is provided with a first interface sealing ring assembly, a second interface sealing ring assembly and a third interface sealing ring assembly;
the first interface sealing ring component is used for: the light source assembly is connected with the angle mirror type Michelson interferometer and the light path assembly in a clamping and sealing manner, and the light source assembly is hung on the side edges of the angle mirror type Michelson interferometer and the light path assembly;
the interface sealing ring component II is used for: and the first sealing window sheet of the angle mirror type Michelson interferometer and the first sealing window sheet of the optical path assembly are connected with the third sealing window sheet of the gas chamber in a clamping and sealing manner.
The interface sealing ring component III is used for: and the angle mirror type Michelson interferometer and the sealing window II of the optical path assembly are connected with the sealing window IV of the gas chamber in a clamping and sealing manner.
In an embodiment of the present invention, the angle mirror type michelson interferometer and optical path module has the following settings:
a sealing ring is arranged on a fixed connecting surface between the bottom of the sealing cavity and the first bottom plate;
a sealing ring is arranged on a fixed connecting surface between the upper part of the sealing cavity and the upper cover;
sealing rings are arranged in the first interface sealing ring assembly, the second interface sealing ring assembly and the third interface sealing ring assembly;
the sealing ring is a cyanide rubber sealing ring.
In an embodiment of the present invention, a second bottom plate is arranged below the first bottom plate, and a first shock absorber, a second shock absorber and a third shock absorber are arranged between the first bottom plate and the second bottom plate;
the first damper and the second damper are positioned below the angle mirror type Michelson interferometer and the optical path component;
the shock absorber is positioned below the gas chamber;
the first shock absorber, the second shock absorber and the third shock absorber are used for reducing the influence of vibration and impact in the environment on the interference degree of the interferometer;
the first shock absorber, the second shock absorber and the third shock absorber are rubber flat plate type shock absorbers,
the power panel, the electric main board, the battery, the air pump and the electromagnetic valve are located on the second bottom plate.
The utility model provides a be fit for open-air complex environment's portable Fourier transform infrared gas analyzer has mainly carried out following design:
1. and (3) sealing design of the optical path component: the infrared light source component, the interferometer, the light path component and the gas chamber are all designed in a sealing way; the light source assembly, the interferometer and the light path assembly, and the interferometer and the light path assembly and the gas chamber are connected in a buckling mode through the interface sealing ring.
The whole gas analyzer light path is in 3 cavities with good sealing performance of a light source sealing cavity, an interferometer, the light path sealing cavity and a gas chamber, and the influence of water and carbon dioxide in the ambient air can be completely removed by carrying out nitrogen purging on a purging port of the gas analyzer and a zero gas inlet of the gas analyzer.
2. Designing a partitioned anti-seismic platform: to complicated open-air environment, carry out high stability modularization subregion design, the mode that the bumper shock absorber was put in bilayer structure is adopted to the interferometer bottom plate vibration, impact etc. reduce the influence to interferometer interference degree and then to gas analysis appearance overall stability in the environment to the at utmost. The interferometer, the light path sealing cavity and the gas chamber are arranged on the upper-layer bottom plate, so that the stability of the light path of the gas analyzer in the using process is ensured. Other components not related to the light path are directly arranged on the lower bottom plate.
The choice of materials and form of the damper is also important to function, with overly hard materials absorbing insufficient shock and not absorbing well, and overly soft materials displacing a significant amount of force to amplify the amplitude. Through comprehensive consideration on volume, weight, structural gravity center distribution, impact vibration conditions, design redundancy and the like, a rubber flat plate type shock absorber is optimized, and the interferometer is integrally more stable due to three-point layout. The gas analyzer has the characteristics of excellent environmental applicability, vibration resistance, stable mechanical property, stable long-term working performance, good maintenance performance and the like.
3. Designing the temperature stability: the main sources of heat generation that affect the temperature stability of a gas analyzer are lasers and infrared light sources. Due to the sealed design of the gas analyzer, there is little exchange of air between the outside and the inside of the gas analyzer. It is very critical to solve the heat dissipation problem.
Therefore, the temperature control semiconductor laser is adopted to replace the traditional helium-neon laser with large heating value, and the influence of the heating source of the helium-neon laser is eliminated. The infrared light source is designed into a relatively independent component by adopting an infrared light source suspension design, and the shell of the infrared light source is a large heat dissipation body, so that the influence of an infrared light source on the gas analyzer is reduced. The temperature stability of the gas analyzer in the long-term use process is ensured.
The utility model discloses possess complete independent intellectual property right, for the portable Fourier infrared gas analysis appearance of commercialization that is fit for open-air complex environment, broken the monopoly of foreign brand, technical indicator and environment suitability all are superior to corresponding product abroad, can use widely in the broad and broad area of the broad width of the country person.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic top view of a portable fourier transform infrared gas analyzer suitable for complex field environments according to an embodiment of the present invention;
fig. 2 is a schematic top view of a shock absorbing part according to an embodiment of the present invention;
fig. 3 is a schematic side view of an interferometer and a cavity of a light path module according to an embodiment of the present invention;
fig. 4 is an optical schematic diagram of a portable fourier transform infrared gas analyzer suitable for a complex field environment according to an embodiment of the present invention.
Description of reference numerals: 1-a light source assembly; 2-an interface sealing ring assembly I; 3-cable group one; 4-angle mirror type Michelson interferometer and optical path assembly; 5, a power panel; 6-cable group two; 7-an electrical motherboard; 8-interface sealing ring component II; 9-interface sealing ring component III; 10-a gas chamber; 11-a battery; 12-gas chamber inlet; 13-gas chamber outlet; 14-electromagnetic valve air outlet; 15-air pump inlet; 16-air pump outlet; 17-an air pump; 18-a solenoid valve; 19-gas analyzer gas outlet; 20-a gas analyzer sample gas inlet; 21-zero gas inlet of gas analyzer; 22-gas analyzer purge port; 23-inlet of electromagnetic valve I; 24-electromagnetic valve air inlet II; 25-interferometer and optical path component purge port; 26-a first shock absorber; 27-a second shock absorber; 28-shock absorber three; 29-upper cover; 30-sealing the cavity; 31-a first bottom plate; 32-a second bottom plate; 33-a light-transmissive pane; 34-a first plane mirror; 35-a second plane mirror; 36-a collimating mirror; 37-an infrared light source; 38-plane mirror three; 39-laser detector; 40-a beam splitter; 41-plane mirror four; 42-sealing the first window sheet; 43-sealing the third window sheet; 44-concave mirror one; 45-concave mirror two; 46-concave mirror three; 47-sealing window sheet four; 48-sealing the second window sheet; 49-infrared detector; a 50-ellipsoidal mirror; 51-parabolic mirror; 52-moving mirror; 53-fixing the mirror; 54-laser.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Fig. 1 is the utility model relates to an embodiment's the overhead schematic view of the portable fourier transform infrared gas analyzer that is fit for open-air complex environment, fig. 2 is the utility model relates to an embodiment's the overhead schematic view of shock attenuation part, fig. 3 is the utility model discloses an interferometer and light path subassembly cavity look sideways at the schematic view, fig. 4 is the utility model relates to an embodiment's the optical principle schematic view of the portable fourier transform infrared gas analyzer that is fit for open-air complex environment. As shown in fig. 1-4, the utility model provides a portable fourier transform infrared gas analyzer suitable for field complex environment includes: light source subassembly 1, interface sealing washer subassembly one 2, cable assembly one 3, angle mirror type michelson interferometer and light path subassembly 4, power strip 5, two 6, electric mainboard 7, two 8, three 9, gas chamber 10, battery 11, air pump 17, solenoid valve 18 of interface sealing washer subassembly, wherein:
the light source assembly 1 comprises a collimating mirror 36, an infrared light source 37 and a plane mirror one 38,
the angle mirror type Michelson interferometer and light path component 4 comprises a light-transmitting window sheet 33, a first plane reflector 34, a second plane reflector 35, a laser detector 39, a beam splitter 40, a fourth plane reflector 41, a first sealing window sheet 42, a second sealing window sheet 48, an infrared detector 49, an ellipsoidal mirror 50, a parabolic mirror 51, a movable mirror 52, a fixed mirror 53 and a laser 54,
the gas chamber 10 comprises a sealing window sheet three 43, a concave mirror one 44, a concave mirror two 45, a concave mirror three 46 and a sealing window sheet four 47;
the light source assembly 1 is used for generating an infrared radiation light source, the collimating mirror 36 is used for reflecting light emitted by the infrared light source 37 to form infrared parallel light and emitting the infrared parallel light to the plane mirror three 38, and the plane mirror three 38 is used for turning the infrared parallel light emitted to the plane mirror three 38 by 90 degrees and then emitting the infrared parallel light to the beam splitter 40;
the laser 54 is configured to generate a laser beam and emit the laser beam to the light-transmitting window 33, the light-transmitting window 33 is configured to transmit the laser beam, the first plane mirror 34 is configured to receive the laser beam transmitted through the light-transmitting window 33, turn the laser beam by 90 ° and then reflect the laser beam to the second plane mirror 35, and the second plane mirror 35 is configured to receive the laser beam reflected by the first plane mirror 34, turn the laser beam by 90 ° and then reflect the laser beam to the beam splitter 40;
the beam splitter 40 is configured to split the infrared parallel light emitted to the beam splitter 40 into two beams, one beam is infrared reflected light one, the other beam is infrared transmitted light, and the infrared reflected light one is emitted to the fixed mirror 53 and the infrared transmitted light is emitted to the movable mirror 52;
the fixed mirror 53 is used for reflecting the infrared reflected light emitted by the beam splitter 40 back to the beam splitter 40 again to form infrared reflected light II;
the movable mirror 52 is used for reflecting the infrared transmission light emitted by the beam splitter 40 back to the beam splitter 40 while the movable mirror 52 moves to form infrared reflection light III;
the beam splitter 40 is further configured to receive a second infrared reflected light of the fixed mirror 53 and a third infrared reflected light of the movable mirror 52 to form an interference light, and transmit the interference light to the fourth plane mirror 41, the beam splitter 40 divides the laser beam transmitted to the beam splitter 40 into two beams, one beam is a first laser reflected light, the other beam is a first laser transmitted light, the first laser reflected light is transmitted to the fixed mirror 53, and the first laser transmitted light is transmitted to the movable mirror 52;
the fixed mirror 53 is further configured to re-reflect the laser reflection light emitted by the beam splitter 40 back to the beam splitter 40 again to form a laser reflection light two;
the movable mirror 52 is further configured to reflect the laser transmission light emitted by the beam splitter 40 back to the beam splitter 40 while the movable mirror 52 moves, so as to form a laser reflection light three;
the beam splitter 40 is further configured to receive the second laser reflection light of the fixed mirror 53 and the third laser reflection light of the movable mirror 52, reflect the second laser reflection light of the fixed mirror 53 to form a fourth laser reflection light, and then emit the fourth laser reflection light to the laser detector 39, and the beam splitter 40 transmits the third laser reflection light of the movable mirror 52 to form a second laser transmission light, and then emits the second laser transmission light to the laser detector 39;
the laser detector 39 is used for receiving the reflected laser light IV reflected by the beam splitter 40 and the transmitted laser light II transmitted by the beam splitter 40;
the moving mirror 52 is fixedly connected to a linear guide (not shown in the figure), and the linear guide is connected to a voice coil motor (not shown in the figure), although the present invention does not show the specific form of the linear guide and the voice coil motor, it belongs to the common technical means for those skilled in the art, and therefore, the details are not repeated;
the voice coil motor is used for driving the linear guide rail to move;
the plane mirror four 41 is used for transmitting the interference light emitted by the beam splitter 40, turning the parallel light by 90 degrees and then emitting the parallel light to the parabolic mirror 51;
the parabolic mirror 51 is used for reflecting the interference light reflected to the parabolic mirror 51 by the plane mirror four 41 and then transmitting the interference light through the sealing window sheet one 42;
the sealing window sheet I42 is used for transmitting interference light reflected by the parabolic mirror 51;
the second sealing window sheet 48 is used for transmitting interference light passing through the gas chamber 10;
the ellipsoidal mirror 50 is used for converging the interference light emitted to the ellipsoidal mirror 50 to the focus of the infrared detector 49;
a strip-shaped infrared beam splitting film is arranged along the diameter direction of the center of the beam splitter 40, laser beam splitting films are arranged on two sides of the strip-shaped infrared beam splitting film, the infrared beam splitting film is used for reflecting or transmitting infrared beams, and the laser beam splitting film is used for reflecting or transmitting laser beams;
the sealing window sheet three 43 is used for transmitting the interference light transmitted by the sealing window sheet one 42;
the concave mirror I44 is used for circularly reflecting the interference light transmitted by the sealed window sheet III 43 to the concave mirror III 46 for multiple times;
the third concave mirror 46 is used for circularly reflecting the interference light emitted to the first concave mirror 44 back to the first concave mirror 44 for multiple times, and circularly reflecting the interference light emitted to the first concave mirror 44 to the second concave mirror 45 for multiple times;
the second concave mirror 45 is used for circularly reflecting the interference light emitted to the third concave mirror 46 back to the third concave mirror 46 for multiple times, and transmitting the interference light emitted to the third concave mirror 46 through a fourth sealing window sheet 47 after being circularly reflected for multiple times;
the sealing louver four 47 serves to transmit the interference light emitted to the concave mirror two 45.
As shown in fig. 1, a gas analyzer gas outlet 19, a gas analyzer sample gas inlet 20, a gas analyzer zero gas inlet 21, a gas analyzer purge port 22, a solenoid valve gas inlet one 23, a solenoid valve gas inlet two 24, and an interferometer and optical path assembly purge port 25 are provided for gas flow therethrough.
In this embodiment, the collimator lens 36 is a collimating parabolic lens.
In this embodiment, the laser 54 is a 850nm temperature-controlled semiconductor laser. The laser beam splitting film is matched with a 850nm temperature control semiconductor laser, the beam splitter 40 is a zinc selenide beam splitter,
in this embodiment, the optical reflection surfaces of the collimator 36, the first plane mirror 34, the fourth plane mirror 41, the ellipsoidal mirror 50, the parabolic mirror 51, the movable mirror 52, the fixed mirror 53, the first concave mirror 44, the second concave mirror 45, and the third concave mirror 46 are gold-plated optical reflection surfaces
In this embodiment, the angle mirror type michelson interferometer and optical path component 4 further includes: a sealed cavity 30, a first bottom plate 31 and an upper cover 29;
the laser 54, the laser detector 39, the beam splitter 40, the fixed mirror 53, the movable mirror 52, the linear guide rail, the voice coil motor, the light-transmitting window sheet 33, the first plane mirror 34, the second plane mirror 35, the fourth plane mirror 41, the ellipsoidal mirror 50, the parabolic mirror 51 and the infrared detector 49 are all located below the upper cover and fixedly connected to the first bottom plate 31, and the gas chamber 10 is fixedly connected to the first bottom plate 31.
In this embodiment, the outer wall of the seal cavity is provided with a first interface seal ring assembly 2, a second interface seal ring assembly 8 and a third interface seal ring assembly 9;
the interface seal ring assembly one 2 is used for: the light source assembly 1 is connected with the angle mirror type Michelson interferometer and the light path assembly 4 in a clamping and sealing mode, and the light source assembly 1 is hung on the side edge of the angle mirror type Michelson interferometer and the light path assembly 4;
the second interface sealing ring component 8 is used for: the first sealing window 42 of the angle mirror type michelson interferometer and optical path assembly 4 and the third sealing window 43 of the gas chamber 10 are connected by snap-in sealing.
The third interface seal ring component 9 is used for: the second sealing window 48 of the angle mirror type michelson interferometer and optical path assembly 4 and the fourth sealing window 47 of the gas chamber 10 are connected by a snap-in seal.
In this embodiment, the angle mirror type michelson interferometer and optical path component 4 has the following settings:
a sealing ring is arranged on a fixed connecting surface between the bottom of the sealing cavity 30 and the first bottom plate 31;
a sealing ring is arranged on a fixed connecting surface between the upper part of the sealing cavity 30 and the upper cover;
sealing rings are arranged in the first interface sealing ring component 2, the second interface sealing ring component 8 and the third interface sealing ring component 9;
the sealing ring is a cyanide rubber sealing ring.
In this embodiment, a second bottom plate 32 is arranged below the first bottom plate 31, and a first shock absorber 26, a second shock absorber 27 and a third shock absorber 28 are arranged between the first bottom plate 31 and the second bottom plate 32;
the first shock absorber 26 and the second shock absorber 27 are positioned below the angle mirror type Michelson interferometer and the optical path component 4;
a third damper 28 is located below the gas chamber 10;
the first shock absorber 26, the second shock absorber 27 and the third shock absorber 28 are used for reducing the influence of vibration and impact in the environment on the interference degree of the interferometer;
the first shock absorber 26, the second shock absorber 27 and the third shock absorber 28 are rubber flat plate type shock absorbers,
the power panel 5, the electric main board 7, the battery 11, the air pump 17 and the electromagnetic valve 18 are positioned on the second bottom plate 32.
The utility model provides a be fit for open-air complex environment's portable Fourier transform infrared gas analyzer has mainly carried out following design:
1. and (3) sealing design of the optical path component: the infrared light source component, the interferometer, the light path component and the gas chamber are all designed in a sealing way; the light source assembly, the interferometer and the light path assembly, and the interferometer and the light path assembly and the gas chamber are connected in a buckling mode through the interface sealing ring.
The whole gas analyzer light path is in 3 cavities with good sealing performance of a light source sealing cavity, an interferometer, the light path sealing cavity and a gas chamber, and the influence of water and carbon dioxide in the ambient air can be completely removed by carrying out nitrogen purging on a purging port of the gas analyzer and a zero gas inlet of the gas analyzer.
2. Designing a partitioned anti-seismic platform: to complicated open-air environment, carry out high stability modularization subregion design, the mode that the bumper shock absorber was put in bilayer structure is adopted to the interferometer bottom plate vibration, impact etc. reduce the influence to interferometer interference degree and then to gas analysis appearance overall stability in the environment to the at utmost. The interferometer, the light path sealing cavity and the gas chamber are arranged on the upper-layer bottom plate, so that the stability of the light path of the gas analyzer in the using process is ensured. Other components not related to the light path are directly arranged on the lower bottom plate.
The choice of materials and form of the damper is also important to function, with overly hard materials absorbing insufficient shock and not absorbing well, and overly soft materials displacing a significant amount of force to amplify the amplitude. Through comprehensive consideration on volume, weight, structural gravity center distribution, impact vibration conditions, design redundancy and the like, a rubber flat plate type shock absorber is optimized, and the interferometer is integrally more stable due to three-point layout. The gas analyzer has the characteristics of excellent environmental applicability, vibration resistance, stable mechanical property, stable long-term working performance, good maintenance performance and the like.
3. Designing the temperature stability: the main sources of heat generation that affect the temperature stability of a gas analyzer are lasers and infrared light sources. Due to the sealed design of the gas analyzer, there is little exchange of air between the outside and the inside of the gas analyzer. It is very critical to solve the heat dissipation problem.
Therefore, the temperature control semiconductor laser is adopted to replace the traditional helium-neon laser with large heating value, and the influence of the heating source of the helium-neon laser is eliminated. The infrared light source is designed into a relatively independent component by adopting an infrared light source suspension design, and the shell of the infrared light source is a large heat dissipation body, so that the influence of an infrared light source on the gas analyzer is reduced. The temperature stability of the gas analyzer in the long-term use process is ensured.
The utility model discloses possess complete independent intellectual property right, for the portable Fourier infrared gas analysis appearance of commercialization that is fit for open-air complex environment, broken the monopoly of foreign brand, technical indicator and environment suitability all are superior to corresponding product abroad, can use widely in the broad and broad area of the broad width of the country person.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (8)
1. A portable fourier transform infrared gas analyzer adapted for field complex environments, comprising: light source subassembly (1), interface sealing washer subassembly one (2), cable assembly one (3), angle mirror type michelson interferometer and light path subassembly (4), power strip (5), cable assembly two (6), electric mainboard (7), interface sealing washer subassembly two (8), interface sealing washer subassembly three (9), gas chamber (10), battery (11), air pump (17), solenoid valve (18), wherein:
the light source component (1) comprises a collimating mirror (36), an infrared light source (37) and a plane reflecting mirror III (38),
the angle mirror type Michelson interferometer and the optical path component (4) comprises a light-transmitting window sheet (33), a first plane reflector (34), a second plane reflector (35), a laser detector (39), a beam splitter (40), a fourth plane reflector (41), a first sealing window sheet (42), a second sealing window sheet (48), an infrared detector (49), an ellipsoidal mirror (50), a parabolic mirror (51), a movable mirror (52), a fixed mirror (53) and a laser (54),
the gas chamber (10) comprises a sealing window sheet III (43), a concave mirror I (44), a concave mirror II (45), a concave mirror III (46) and a sealing window sheet IV (47);
the light source component (1) is used for generating an infrared radiation light source, the collimating mirror (36) is used for reflecting light emitted by the infrared light source (37) to form infrared parallel light and emitting the infrared parallel light to the plane mirror III (38), and the plane mirror III (38) is used for turning the infrared parallel light emitted to the plane mirror III (38) by 90 degrees and then emitting the infrared parallel light to the beam splitter (40);
the laser device (54) is used for generating a laser beam and emitting the laser beam to the light-transmitting window sheet (33), the light-transmitting window sheet (33) is used for transmitting the laser beam, the first plane mirror (34) is used for receiving the laser beam transmitted through the light-transmitting window sheet (33) and reflecting the laser beam to the second plane mirror (35) after turning 90 degrees, and the second plane mirror (35) is used for receiving the laser beam reflected by the first plane mirror (34) and reflecting the laser beam to the beam splitter (40) after turning 90 degrees;
the beam splitter (40) is used for splitting the infrared parallel light emitted to the beam splitter (40) into two beams, one beam is infrared reflection light I, the other beam is infrared transmission light, the infrared reflection light I is emitted to the fixed mirror (53), and the infrared transmission light is emitted to the movable mirror (52);
the fixed mirror (53) is used for reflecting the infrared reflected light emitted by the beam splitter (40) back to the beam splitter (40) again to form infrared reflected light II;
the movable mirror (52) is used for reflecting the infrared transmission light emitted by the beam splitter (40) back to the beam splitter (40) when the movable mirror (52) moves to form infrared reflection light III;
the beam splitter (40) is further used for receiving the infrared reflected light II of the fixed mirror (53) and the infrared reflected light III of the movable mirror (52) to form interference light and transmitting the interference light to the plane reflecting mirror IV (41), the beam splitter (40) divides the laser beam transmitted to the beam splitter (40) into two beams, one beam is the laser reflected light I, the other beam is the laser transmitted light I, the laser reflected light I is transmitted to the fixed mirror (53), and the laser transmitted light I is transmitted to the movable mirror (52);
the fixed mirror (53) is also used for reflecting the laser reflected light emitted by the beam splitter (40) back to the beam splitter (40) again to form laser reflected light II;
the movable mirror (52) is also used for reflecting the laser transmission light emitted by the beam splitter (40) back to the beam splitter (40) to form a laser reflection light III while the movable mirror (52) moves;
the beam splitter (40) is further used for receiving the second laser reflection light of the fixed mirror (53) and the third laser reflection light of the movable mirror (52), reflecting the second laser reflection light of the fixed mirror (53) to form a fourth laser reflection light, and then emitting the fourth laser reflection light to the laser detector (39), and the beam splitter (40) transmits the third laser reflection light of the movable mirror (52) to form a second laser transmission light and then emits the second laser transmission light to the laser detector (39);
the laser detector (39) is used for receiving laser reflected light IV reflected by the beam splitter (40) and laser transmitted light II transmitted by the beam splitter (40);
the movable mirror (52) is fixedly connected with a linear guide rail, and the linear guide rail is connected with a voice coil motor;
the voice coil motor is used for driving the linear guide rail to move;
the plane mirror four (41) is used for transmitting the interference light emitted by the beam splitter (40), turning the parallel light by 90 degrees and then emitting the parallel light to the parabolic mirror (51);
the parabolic mirror (51) is used for reflecting the interference light reflected to the parabolic mirror (51) by the plane mirror four (41) and then transmitting the interference light through the sealing window sheet one (42);
the sealing window sheet I (42) is used for transmitting interference light reflected by the parabolic lens (51);
the second sealing window sheet (48) is used for transmitting interference light passing through the gas chamber (10);
the ellipsoidal mirror (50) is used for converging the interference light emitted to the ellipsoidal mirror (50) to the focus of the infrared detector (49);
a strip-shaped infrared beam splitting film is arranged along the diameter direction of the center of the beam splitter (40), laser beam splitting films are arranged on two sides of the strip-shaped infrared beam splitting film, the infrared beam splitting film is used for reflecting or transmitting infrared beams, and the laser beam splitting film is used for reflecting or transmitting laser beams;
the sealing window sheet three (43) is used for transmitting the interference light transmitted by the sealing window sheet one (42);
the concave mirror I (44) is used for circularly reflecting the interference light transmitted by the sealed window sheet III (43) to the concave mirror III (46) for multiple times;
the concave mirror III (46) is used for circularly reflecting the interference light emitted to the concave mirror I (44) back to the concave mirror I (44) for multiple times, and circularly reflecting the interference light emitted to the concave mirror I (44) to the concave mirror II (45) for multiple times after being circularly reflected for multiple times;
the concave mirror II (45) is used for circularly reflecting the interference light emitted to the concave mirror III (46) back to the concave mirror III (46) for multiple times, and transmitting the interference light emitted to the concave mirror III (46) through a sealing window sheet IV (47) after being circularly reflected for multiple times;
the sealing window sheet four (47) is used for transmitting the interference light emitted to the concave mirror two (45).
2. The portable fourier transform infrared gas analyzer adapted for field complex environments as set forth in claim 1, wherein the collimator lens (36) is a collimating parabolic lens.
3. The portable fourier transform infrared gas analyzer adapted for field complex environments as set forth in claim 1, wherein the laser (54) is a 850nm temperature controlled semiconductor laser; the laser beam splitting film is matched with the 850nm temperature control semiconductor laser, and the beam splitter (40) is a zinc selenide beam splitter.
4. The portable fourier transform infrared gas analyzer suitable for field complex environment as claimed in claim 1, wherein the optical reflecting surfaces of the collimator mirror (36), the first plane mirror (34), the second plane mirror (35), the third plane mirror (38), the fourth plane mirror (41), the ellipsoidal mirror (50), the parabolic mirror (51), the movable mirror (52), the fixed mirror (53), the first concave mirror (44), the second concave mirror (45) and the third concave mirror (46) are gold-plated optical reflecting surfaces.
5. The portable fourier transform infrared gas analyzer adapted for field complex environment as claimed in claim 1, wherein the angle mirror type michelson interferometer and optical path assembly (4) further comprises: the sealing cavity (30), the first bottom plate (31) and the upper cover (29);
the laser device (54), the laser detector (39), the beam splitter (40), the fixed mirror (53), the movable mirror (52), the linear guide rail, the voice coil motor, the light-transmitting window sheet (33), the first plane reflector (34), the second plane reflector (35), the fourth plane reflector (41), the ellipsoidal mirror (50), the parabolic mirror (51) and the infrared detector (49) are all located below the upper cover and are fixedly connected to the first bottom plate (31), and the gas chamber (10) is fixedly connected to the first bottom plate (31).
6. The portable fourier transform infrared gas analyzer suitable for field complex environments as claimed in claim 5, wherein the outer wall of the sealed cavity is provided with a first interface sealing ring assembly (2), a second interface sealing ring assembly (8) and a third interface sealing ring assembly (9);
the first interface sealing ring component (2) is used for: the light source assembly (1) is connected with the angle mirror type Michelson interferometer and the light path assembly (4) in a clamping and sealing mode, and the light source assembly (1) is hung on the side edge of the angle mirror type Michelson interferometer and the light path assembly (4);
the second interface seal ring assembly (8) is used for: a first sealing window sheet (42) of the angle mirror type Michelson interferometer and the optical path assembly (4) is connected with a third sealing window sheet (43) of the gas chamber (10) in a clamping and sealing mode;
the interface seal ring assembly three (9) is used for: and a second sealing window sheet (48) of the angle mirror type Michelson interferometer and the optical path assembly (4) is connected with a fourth sealing window sheet (47) of the gas chamber (10) in a clamping and sealing manner.
7. The portable fourier transform infrared gas analyzer adapted to field complex environment as claimed in claim 5, wherein the angle mirror type michelson interferometer and optical path assembly (4) has the following arrangement:
a sealing ring is arranged on a fixed connecting surface between the bottom of the sealing cavity (30) and the first bottom plate (31);
a sealing ring is arranged on a fixed connecting surface between the upper part of the sealing cavity (30) and the upper cover (29);
sealing rings are arranged in the first interface sealing ring component (2), the second interface sealing ring component (8) and the third interface sealing ring component (9);
the sealing ring is a cyanide rubber sealing ring.
8. The portable Fourier transform infrared gas analyzer suitable for field complex environment as claimed in claim 5, wherein a second bottom plate (32) is arranged under the first bottom plate (31), and a first shock absorber (26), a second shock absorber (27) and a third shock absorber (28) are arranged between the first bottom plate (31) and the second bottom plate (32);
the first shock absorber (26) and the second shock absorber (27) are positioned below the angle mirror type Michelson interferometer and the optical path component (4);
the third damper (28) is positioned below the gas chamber (10);
the first shock absorber (26), the second shock absorber (27) and the third shock absorber (28) are used for reducing the influence of vibration and impact in the environment on the interferometer interference degree;
the first shock absorber (26), the second shock absorber (27) and the third shock absorber (28) are rubber flat-plate type shock absorbers,
the power panel (5), the electric main board (7), the battery (11), the air pump (17) and the electromagnetic valve (18) are positioned on the second bottom plate (32).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044474A (en) * | 2019-12-17 | 2020-04-21 | 北京北分瑞利分析仪器(集团)有限责任公司 | Portable Fourier transform infrared gas analyzer suitable for field complex environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044474A (en) * | 2019-12-17 | 2020-04-21 | 北京北分瑞利分析仪器(集团)有限责任公司 | Portable Fourier transform infrared gas analyzer suitable for field complex environment |
| CN111044474B (en) * | 2019-12-17 | 2024-05-17 | 北京北分瑞利分析仪器(集团)有限责任公司 | Portable Fourier transform infrared gas analyzer suitable for field complex environment |
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