CN111707638A - Laser analyzer based on semiconductor laser absorption spectrum DLAS technology - Google Patents
Laser analyzer based on semiconductor laser absorption spectrum DLAS technology Download PDFInfo
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- CN111707638A CN111707638A CN202010689778.3A CN202010689778A CN111707638A CN 111707638 A CN111707638 A CN 111707638A CN 202010689778 A CN202010689778 A CN 202010689778A CN 111707638 A CN111707638 A CN 111707638A
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- laser
- receiving plate
- dlas
- temperature regulating
- fan
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—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
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention relates to the technical field of laser gas analyzers, in particular to a laser analyzer based on semiconductor laser absorption spectrum DLAS technology, which comprises a laser analyzer, wherein the laser analyzer consists of a receiving plate, a laser tube and a control host, a nitrogen tank is arranged on the upper end surface of the receiving plate, a temperature regulating box is arranged on the left side of the receiving plate, a transit tube is inserted on the right side of the receiving plate, and the laser analyzer has the advantages that: the temperature regulating box is arranged at the front end of the analyzer, so that the gas is cooled by water flow, the temperature of the gas is adapted to the working temperature of the analyzer, and meanwhile, the real-time monitoring of the gas temperature is realized by the detection of the first electromagnetic valve and the thermometer; through set up the transfer pipe between laser pipe and dash receiver, utilize the transfer pipe to realize the replacement of inside gaseous and the convenient of laser rear side position and seal to realize inside anaerobic measurement, not only improved the precision that detects, greatly strengthen the security simultaneously, realize gaseous on-line measuring simultaneously, reduce the process of sample.
Description
Technical Field
The invention relates to the technical field of laser gas analyzers, in particular to a laser analyzer based on semiconductor laser absorption spectrum DLAS technology.
Background
A laser process gas analysis system based on a semiconductor laser absorption spectroscopy (DLAS) technology is a laser gas analysis system adopting an integrated design and high integration level. The system can rapidly, accurately and reliably measure process gases such as various industrial process gases, environment-friendly emission flue gas and the like In an In-Situ (In-Situ) measurement mode without sampling pretreatment, provides an optimal solution for online detection of gases In various industries, and is a laser gas analyzer, a domestic gas analyzer for realizing In-Situ online measurement, which is a great innovation of the traditional sampling type gas analyzer and is widely applied to the industries such as steel, petrifaction, environment protection and the like.
However, because the temperature of the industrial gas is high, the internal equipment is often damaged due to high temperature during detection, so that the precision of detection and analysis is influenced, the service life of the equipment is greatly reduced, meanwhile, the industrial gas is flammable, the air inside the industrial gas is mixed under the irradiation of laser, so that the explosion is easily caused, the detection danger of the equipment is further improved, and the detection error is easily increased due to the air inside the industrial gas.
Therefore, the laser analyzer based on the semiconductor laser absorption spectrum DLAS technology is provided to solve the problems of detection precision and temperature regulation.
Disclosure of Invention
The invention aims to provide a laser analyzer based on semiconductor laser absorption spectrum DLAS technology, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a laser analyzer based on semiconductor laser absorption spectrum DLAS technology comprises a laser analyzer, wherein the laser analyzer is composed of a receiving plate, a laser tube and a control host, a nitrogen tank is arranged on the upper end face of the receiving plate, a temperature regulating box is arranged on the left side of the receiving plate, a transit tube is inserted on the right side of the receiving plate, an air inlet tube is inserted on the upper end of the left side of the temperature regulating box, a folded tube extending downwards is arranged in the inner cavity of the temperature regulating box, an air outlet tube is arranged at the lower end of the right side of the temperature regulating box and communicated with the receiving plate, a first electromagnetic valve is arranged on the right side of the air outlet tube, a thermometer is inserted on the upper end of the middle section of the air outlet tube, the inner cavity of the transit tube is arranged to be an adjusting inner cavity, the right side of the transit tube is communicated with the laser tube, a driving motor is fixedly arranged on the left side of the inner cavity, the outer wall of lamp house passes through a plurality of fan-shaped connecting rods fixed welding that the circumference array distributes and adjusts the inner wall of inner chamber, and the circumference array distributes is adjacent leave fan-shaped inlet port between the fan-shaped connecting rod, the right side intercommunication control host computer of laser pipe, the vertical gas outlet that is provided with in lower extreme right side of laser pipe, the position that the left side of control host computer is located the laser pipe inner chamber is provided with the receiving terminal.
Preferably, the vertical input interface of left side lower extreme of receiving plate, the right side centre of receiving plate is provided with the output interface, and the input interface intercommunication outlet duct of receiving plate, the right side output interface intercommunication regulation inner chamber of receiving plate.
Preferably, the inner cavity of the temperature regulating box is filled with temperature regulating water, the upper end of the temperature regulating box is vertically provided with a water outlet, the middle of the lower end face of the temperature regulating box is provided with a water inlet, and the water inlet and the water outlet are both communicated with the inner cavity of the temperature regulating box.
Preferably, the outer wall of the upper end of the middle section of the transit pipe is provided with an external connector, the upper end of the external connector is spliced with an air guide pipe, the other end of the air guide pipe is communicated with a nitrogen tank, and the outer wall of the middle section of the air guide pipe is provided with a second electromagnetic valve.
Preferably, the left end and the right end of the transit pipe are fixedly welded with flange plates, the end face of each flange plate is provided with four screw holes distributed in a circumferential array mode, and the flange plates are fixedly, hermetically and fixedly connected with the receiving plate and the laser pipe through locking screws.
Preferably, a fan-shaped through groove is left between the fan blades of the closed fan blades, and the inner contour of the fan-shaped through groove is smaller than that of the fan-shaped through groove.
Preferably, driving motor's right side is rotated and is connected with motor shaft, seal the fixed outer wall that cup joints at motor shaft of flabellum, motor shaft's tip is provided with the bull stick, the bull stick extends to the left side inner chamber of lamp house, and rotates through the bearing between the inner wall of bull stick and lamp house and be connected.
Preferably, the right side of the lamp box is provided with a laser light source, the right side of the laser light source is right opposite to the inner cavity of the laser tube, the right side of the laser light source is right opposite to the receiving terminal, and the receiving terminal is a photodiode.
Preferably, a laser analysis module and a laser spectrum module are arranged in the control host, and the control host is electrically connected with the receiving terminal and the lamp box.
Compared with the prior art, the invention has the beneficial effects that:
1. the temperature regulating box is arranged at the front end of the analyzer, so that the gas is cooled by water flow, the temperature of the gas is adapted to the working temperature of the analyzer, and meanwhile, the real-time monitoring of the gas temperature is realized by the detection of the first electromagnetic valve and the thermometer;
2. according to the invention, the transfer pipe is arranged between the laser pipe and the receiving plate, and the internal gas replacement and the convenient sealing of the laser rear side position are realized by using the transfer pipe, so that the internal anaerobic measurement is realized, the detection precision is improved, the safety is greatly enhanced, the online measurement of the gas is realized, and the sampling process is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a transfer tube configuration of the present invention;
FIG. 3 is a side view of a transfer tube of the present invention;
fig. 4 is a schematic view of the three-dimensional structure of the sealing fan blade of the present invention.
In the figure: 1. receiving a plate; 2. a control host; 3. a laser tube; 4. a transit tube; 5. a nitrogen tank; 6. a temperature regulating box; 7. an air inlet pipe; 8. an air outlet pipe; 9. a first solenoid valve; 10. a thermometer; 11. folding the tube; 12. a water inlet; 13. a water outlet; 14. an air duct; 15. an external interface; 16. a second solenoid valve; 17. locking the screw; 18. a drive motor; 19. a motor shaft; 20. sealing the fan blades; 21. a light box; 22. a fan-shaped connecting rod; 23. an air outlet; 24. a receiving terminal; 25. screw holes; 26. a flange plate; 27. a fan-shaped air inlet; 28. a laser light source; 29. adjusting the inner cavity; 30. a rotating rod; 31. the sector penetrates through the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution:
a laser analyzer based on semiconductor laser absorption spectrum DLAS technology comprises a laser analyzer, wherein the laser analyzer is composed of a receiving plate 1, a laser tube 3 and a control host machine 2.
The left side of dash receiver 1 is provided with attemperator 6, and it has intake pipe 7 to peg graft in the left side upper end of attemperator 6, and the inner chamber of attemperator 6 is provided with downwardly extending's folding pipe 11, and the right side lower extreme of attemperator 6 is provided with outlet duct 8, utilizes folding pipe 11 increase gaseous circulation time in 6 inside of attemperator to realize the purpose of fully adjusting the temperature.
The vertical input interface of left side lower extreme of dash receiver 1, the right side centre of dash receiver 1 is provided with the output interface, and the input interface intercommunication outlet duct 8 of dash receiver 1, and the right side output interface intercommunication of dash receiver 1 adjusts inner chamber 29, utilizes outlet duct 8 to realize the intercommunication of temperature regulating box 6 and dash receiver 1.
8 intercommunication receiver boards 1 of outlet duct, and the right side of outlet duct 8 is provided with first solenoid valve 9, and the interlude upper end of outlet duct 8 is pegged graft and is had thermometer 10, utilizes the cooperation of first solenoid valve 9 and thermometer 10, realizes the control of the inside gas temperature of temperature regulating box 6 real time monitoring and air current motion.
The inner chamber packing of temperature regulating box 6 has the temperature regulation water, and the upper end of temperature regulating box 6 is vertical to be provided with delivery port 13, is provided with water inlet 12 in the middle of the lower terminal surface of temperature regulating box 6, and water inlet 12 all communicates the inner chamber of temperature regulating box 6 with delivery port 13, utilizes the cooperation of water inlet 12 and delivery port 13, realizes the replacement of the inside rivers that adjust the temperature of temperature regulating box 6 to increase the efficiency that adjusts the temperature.
The right side of the receiving plate 1 is inserted with the transfer tube 4, the left end and the right end of the transfer tube 4 are fixedly welded with the flange plates 26, the end faces of the flange plates 26 are provided with four screw holes 25 distributed in a circumferential array, the flange plates 26 are fixedly and hermetically connected with the receiving plate 1 and the laser tube 3 through the locking screws 17, and the fixed and sealed connection of the transfer tube 4 is realized by the matching of the flange plates 26 and the locking screws 17.
The inner cavity of the transit tube 4 is set as an adjusting inner cavity 29, a lamp box 21 is installed in the middle of the right side of the inner cavity of the adjusting inner cavity 29, the outer wall of the lamp box 21 is fixedly welded on the inner wall of the adjusting inner cavity 29 through a plurality of fan-shaped connecting rods 22 distributed in a circumferential array mode, and the fan-shaped connecting rods 22 are used for achieving fixed installation of the lamp box 21.
The right side of the transit tube 4 is communicated with the laser tube 3, a fan-shaped air inlet 27 is reserved between a pair of adjacent fan-shaped connecting rods 22 distributed in a circumferential array, and the fan-shaped air inlet 27 is utilized to realize the communication with the inner cavity of the laser tube 3.
Adjust inner chamber left side fixed mounting of inner chamber 29 with driving motor 18, driving motor 18's right side is rotated and is installed and is sealed flabellum 20, driving motor 18's right side is rotated and is connected with motor shaft 19, it cup joints the outer wall at motor shaft 19 to seal flabellum 20 fixed, motor shaft 19's tip is provided with bull stick 30, bull stick 30 extends to lamp house 21's left side inner chamber, and rotate through the bearing between 30 inner walls of bull stick and lamp house 21 and be connected, it is connected to utilize bull stick 30 to realize the rotation between motor shaft 19 and the lamp house 21, it rotates to utilize driving motor 18 to drive motor shaft 19, thereby it rotates to drive sealed flabellum 20.
The fan-shaped through groove 31 is reserved between the fan blades of the closed fan blade 20, the inner contour of the fan-shaped through groove 31 is smaller than that of the fan-shaped air inlet 27, air inlet communication is achieved by means of communication between the fan-shaped through groove 31 and the fan-shaped air inlet 27, staggered rotation of the fan-shaped through groove 31 and the fan-shaped air inlet 27 is utilized, accordingly, the air inlet channel is closed, airflow flowing in the inner cavity of the laser tube 3 is avoided, and detection and analysis accuracy is improved.
The up end of dash receiver 1 is provided with nitrogen gas jar 5, and the interlude upper end outer wall of transfer pipe 4 is provided with external interface 15, and the upper end of external interface 15 is pegged graft and is had air duct 14, and the other end intercommunication nitrogen gas jar 5 of air duct 14, the interlude outer wall of air duct 14 are provided with second solenoid valve 16, utilize external interface 15 to realize the intercommunication of transfer pipe 4 and nitrogen gas jar 5, utilize the break-make of second solenoid valve 16 control connection position.
The right side of the laser tube 3 is communicated with the control host 2, a laser analysis module and a laser spectrum module are arranged in the control host 2, the laser analysis is based on a semiconductor laser absorption spectrum DLAS technology, and the process gases such as various industrial process gases and environment-friendly emission flue gas can be quickly, accurately and reliably measured in a measurement mode without sampling pretreatment, so that an optimal solution is provided for online monitoring of the gases in various industries.
The laser spectrum technology is that the wavelength of a laser diode is tuned to the absorption spectrum line of a measured gas, a laser beam reaches a photoelectric sensor of a receiving end from a transmitting end through the measured gas, the photoelectric sensor converts an optical signal into an electric signal by the photodiode, the electric signal is processed by a circuit and a software algorithm, and finally the gas concentration is calculated according to the LAMBER-BEER law.
The working principle is as follows: at first utilize intake pipe 7 to get into high-temperature gas, then utilize the cooperation of water inlet 12 and delivery port 13, realize the inside replacement that adjusts the temperature rivers of temperature box 6, thereby increase the efficiency of adjusting the temperature, utilize folding pipe 11 increase gaseous circulation time inside the temperature box 6, thereby realize the purpose that fully adjusts the temperature, utilize the cooperation of first solenoid valve 9 and thermometer 10, realize the real time monitoring and the control of air current motion of the inside gas temperature of temperature box 6, utilize outlet duct 8 to realize the intercommunication of temperature box 6 and dash receiver 1.
Utilize ring flange 26 and locking screw 17's cooperation, realize the fixed sealing connection of transfer tube 4, utilize fan-shaped connecting rod 22 to realize the fixed mounting of lamp house 21, utilize bull stick 30 to realize that the rotation between motor shaft 19 and the lamp house 21 is connected, utilize driving motor 18 to drive motor shaft 19 and rotate, thereby drive closed flabellum 20 and rotate, utilize the fan-shaped intercommunication that runs through groove 31 and fan-shaped inlet port 27, the intercommunication that admits air is realized, utilize the fan-shaped dislocation rotation that runs through groove 31 and fan-shaped inlet port 27, thereby realize inlet channel's closure, avoid the 3 inner chamber air currents of laser pipe to flow, thereby improve the detection and analysis precision.
Before the detection, utilize external interface 15 to realize the intercommunication of transfer tube 4 and nitrogen gas jar 5, utilize the break-make of second solenoid valve 16 control connection position to utilize the air of nitrogen gas replacement laser tube 3 inner chamber, then utilize the gas replacement laser tube 3 interior nitrogen gas after the thermoregulation, thereby ensure that the gas of being surveyed is in anaerobic environment, avoid causing the explosion.
When the laser beam passes from the laser source 28 through the measurement gas inside the laser tube 3 to the photosensor on the receiving terminal 24, the photodiode converts the optical signal into an electrical signal, which is processed by the circuitry and software algorithms, and finally the gas concentration is calculated according to the law of lamb-BEER.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology comprises a laser analyzer and is characterized in that: the laser analyzer is composed of a receiving plate (1), a laser tube (3) and a control host (2), wherein a nitrogen tank (5) is arranged on the upper end face of the receiving plate (1), a temperature regulating box (6) is arranged on the left side of the receiving plate (1), a transit tube (4) is inserted in the right side of the receiving plate (1), an air inlet pipe (7) is inserted in the upper end of the left side of the temperature regulating box (6), a folding pipe (11) extending downwards is arranged in the inner cavity of the temperature regulating box (6), an air outlet pipe (8) is arranged at the lower end of the right side of the temperature regulating box (6), the air outlet pipe (8) is communicated with the receiving plate (1), a first electromagnetic valve (9) is arranged on the right side of the air outlet pipe (8), a thermometer (10) is inserted in the upper end of the middle section of the air outlet pipe (8), an inner cavity of the transit tube (4) is arranged to be an adjusting, adjust the inner chamber left side fixed mounting of inner chamber (29) have driving motor (18), install lamp house (21) in the middle of the inner chamber right side of adjusting inner chamber (29), the right side of driving motor (18) is rotated and is installed and seal flabellum (20), the outer wall of lamp house (21) is through a plurality of fan-shaped connecting rod (22) fixed welding that the circumference array distributes at the inner wall of adjusting inner chamber (29), and the circumference array distributes a pair of adjacent leave fan-shaped inlet port (27) between fan-shaped connecting rod (22), the right side intercommunication control host computer (2) of laser pipe (3), the vertical gas outlet (23) that is provided with in lower extreme right side of laser pipe (3), the position that the left side of control host computer (2) is located laser pipe (3) inner chamber is provided with.
2. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the vertical input interface of left side lower extreme of receiving plate (1), the right side centre of receiving plate (1) is provided with the output interface, and the input interface intercommunication outlet duct (8) of receiving plate (1), and the right side output interface intercommunication regulation inner chamber (29) of receiving plate (1).
3. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the inner cavity of the temperature regulating box (6) is filled with temperature regulating water, a water outlet (13) is vertically formed in the upper end of the temperature regulating box (6), a water inlet (12) is formed in the middle of the lower end face of the temperature regulating box (6), and the water inlet (12) and the water outlet (13) are communicated with the inner cavity of the temperature regulating box (6).
4. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the middle section upper end outer wall of transfer pipe (4) is provided with external interface (15), the upper end of external interface (15) is pegged graft and is had air duct (14), the other end intercommunication nitrogen gas jar (5) of air duct (14), the middle section outer wall of air duct (14) is provided with second solenoid valve (16).
5. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the laser tube is characterized in that the left end and the right end of the transit tube (4) are fixedly welded with flange plates (26), the end faces of the flange plates (26) are provided with four screw holes (25) distributed in a circumferential array mode, and the flange plates (26) are fixedly, hermetically and fixedly connected with the receiving plate (1) and the laser tube (3) through locking screws (17).
6. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: a fan-shaped through groove (31) is reserved between the fan blades of the closed fan blades (20), and the inner contour of the fan-shaped through groove (31) is smaller than that of the fan-shaped through groove (31).
7. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the right side of driving motor (18) is rotated and is connected with motor shaft (19), seal the fixed outer wall that cup joints in motor shaft (19) of flabellum (20), the tip of motor shaft (19) is provided with bull stick (30), bull stick (30) extend to the left side inner chamber of lamp house (21), and rotate through the bearing between the inner wall of bull stick (30) and lamp house (21) and be connected.
8. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the right side of lamp house (21) is provided with laser light source (28), the right side of laser light source (28) is just to the inner chamber of laser tube (3), and the right side of laser light source (28) is just to receiving terminal (24), receiving terminal (24) are photodiode.
9. The laser analyzer based on semiconductor laser absorption spectroscopy (DLAS) technology as claimed in claim 1, wherein: the laser spectrum monitoring device is characterized in that a laser analysis module and a laser spectrum module are arranged in the control host (2), and the control host (2) is electrically connected with the receiving terminal (24) and the lamp box (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010689778.3A CN111707638A (en) | 2020-07-17 | 2020-07-17 | Laser analyzer based on semiconductor laser absorption spectrum DLAS technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010689778.3A CN111707638A (en) | 2020-07-17 | 2020-07-17 | Laser analyzer based on semiconductor laser absorption spectrum DLAS technology |
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| CN111707638A true CN111707638A (en) | 2020-09-25 |
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| CN202010689778.3A Pending CN111707638A (en) | 2020-07-17 | 2020-07-17 | Laser analyzer based on semiconductor laser absorption spectrum DLAS technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114517458A (en) * | 2022-02-23 | 2022-05-20 | 绿友集团新能源车辆有限公司 | Multi-functional electronic watering lorry |
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2020
- 2020-07-17 CN CN202010689778.3A patent/CN111707638A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114517458A (en) * | 2022-02-23 | 2022-05-20 | 绿友集团新能源车辆有限公司 | Multi-functional electronic watering lorry |
| CN114517458B (en) * | 2022-02-23 | 2022-12-16 | 绿友集团新能源车辆有限公司 | Multi-functional electronic watering lorry |
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