KR101682112B1 - Combustion gas measurement system with automatic alignment function for beam - Google Patents
Combustion gas measurement system with automatic alignment function for beam Download PDFInfo
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- KR101682112B1 KR101682112B1 KR1020150066615A KR20150066615A KR101682112B1 KR 101682112 B1 KR101682112 B1 KR 101682112B1 KR 1020150066615 A KR1020150066615 A KR 1020150066615A KR 20150066615 A KR20150066615 A KR 20150066615A KR 101682112 B1 KR101682112 B1 KR 101682112B1
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- G—PHYSICS
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- 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
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J3/433—Modulation spectrometry; Derivative spectrometry
- G01J3/4338—Frequency modulated spectrometry
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- 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
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- 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
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- 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
- G01N2021/396—Type of laser source
- G01N2021/399—Diode laser
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Abstract
The embodiment of the present invention recognizes the progress direction of the laser on the basis of the vector value through the image information of the laser advancing direction in the combustion chamber, and then automatically aligns the laser emission direction of the laser emitting unit based on the recognition result The present invention relates to a combustion gas measuring system having an automatic light alignment function, comprising: a laser emitting unit installed so that a emitting laser passes through the inside of a combustion chamber; A laser advancing image sensing unit for acquiring an image for determining a traveling direction of the laser in the combustion chamber through a laser beam emitted from the laser emitting unit; Based on the acquired images, According to the may include a laser alignment unit for aligning the laser emitting portion lasing direction.
Description
An embodiment of the present invention relates to a combustion gas measuring system having an automatic light alignment function, for example, by recognizing a traveling direction of a laser on the basis of a vector value through image information about a laser traveling direction in a combustion chamber, To a combustion gas measurement system having an automatic photo-alignment function capable of automatically aligning the laser emission direction of the laser emission part.
Much of the electricity produced in the United States is produced by coal-fired power plants. Globally, much of the electricity production is similarly dependent on coal, which is the main energy source. Given the long-term environmental problems associated with waste generated by nuclear power generation and the inefficiency associated with solar power generation, it is likely that coal will remain a major energy source in the near future. Also, the enormous global coal reserves are enough to produce energy for at least 200 years, even at the current rate.
However, there has been and continues to be a strong need to reduce the emission of pollutants associated with coal-fired power generation and to improve the overall efficiency of coal-fired power generation processes. Traditionally, in power plants and other industrial combustion facilities, the efficiency of the combustion process and the degree of pollutant release are measured indirectly by measuring the collected gas sample with a technique such as NDIR photometry Respectively. The sampling system is not suitable for closed-loop control of the combustion process, as there may be a significant delay between the gas sampling time and the final analysis time. Also, since the sampling process is generally a one-point measurement, the results are very variable and may or may not represent the actual concentration of the measured material in the dynamic combustion chamber.
Laser based optical component sensors have recently attracted attention in connection with extraction measurement technology. Laser-based measurement techniques have the advantage of being able to perform immediate field measurements and provide high-speed feedback suitable for dynamic process control. Tunable diode laser absorption spectroscopy (hereinafter referred to as TDLAS) is a very promising technique for measuring the combustion parameters such as the composition of the combustion gas, the temperature, and the like. TDLAS typically uses diode lasers that operate in the near-infrared and mid-infrared spectral regions. Suitable lasers have been extensively developed for use in the telecommunications industry. The lasers can therefore be used immediately for TDLAS applications. Since the invention of wavelength tunable diode lasers, several TDLAS techniques have been developed to sense and control the combustion process.
For example, wavelength modulation spectroscopy techniques, frequency modulation spectroscopy techniques, and direct absorption spectroscopy techniques are generally known. These techniques are based on the fact that the intensity of the laser light received by the detector is inversely proportional to the concentration of the gas when the laser light with wavelengths that can be absorbed by the gases in the combustion chamber is absorbed in the specific spectral band as it passes through the combustion chamber . The absorption spectrum received by the detector is used to determine the amount of gas component being analyzed in addition to the associated combustion parameters such as temperature.
For example, U.S. patent application 2002 / 0031737A1 (Von Drasek et al.) Describes a method and apparatus using a tunable diode laser for monitoring and / or controlling high temperature processes. This patent is characterized by the use of direct absorption spectroscopy techniques to determine the relative concentration, temperature and other parameters of a large number of combustion components.
U.S. Patent No. 5,813,767 describes a similar system for monitoring combustion and contaminants in a combustion chamber. This US patent uses an indirect spectroscopy technique that uses Doppler broadening in the shape of the observed absorption properties as the basis for temperature analysis.
Teichert, Fernholz, and Ebert extended the TDLAS as a laboratory analysis technique to a feasible field technology capable of measuring specific combustion parameters in boiler fuels of actual coal power plants. (Applied Optics, 42 (12): 2043, 20 April 2003), entitled " Simultaneous in situ Measurement of CO, H2O, Gas Temperature in a Full-Sized, Coal-Fire Power Plant, The authors demonstrate the successful implementation of direct absorption spectroscopy techniques in coal-fired power plants and discuss the technical challenges resulting from the very large and violent nature of the coal combustion process. In particular, the combustion chamber of a conventional coal-fired power plant has a diameter of 10 to 20 m. These thermal power plants are pulverized coal, so the combustion process is difficult to transfer laser light due to the large amount of dust, and emits light of very different wavelengths.
Also, under the combustion conditions of the power plant, various strong disturbances are found. The overall light transmission rate through the combustion chamber will vary dramatically over time as a result of broadband absorption, scattering by particles, or beam steering due to variations in reflectivity. There is also intense thermal radiation from burnt coal particles that can interfere with the detector signal. In addition, the external environment of the power plant boiler also poses a problem in the implementation of the TDLAS detection or control system. For example, electronic components, optical components, or other sensitive spectroscopic technology components should be located far from strong heat, or properly shielded or cooled. Although TDLAS systems are very difficult to run under these conditions, TDLAS is best suited for monitoring and controlling the coal combustion process.
Korean Patent No. 10-1072657 discloses a sensing device for solving problems of TDLAS implementation.
The sensing device is connected to the outgoing optics with one or more diode lasers having a constant oscillation frequency for use in simultaneous measurements of high temperature and gas concentration. The outgoing optics are operatively connected to a processor chamber, such as a combustion chamber or a boiler of a coal or gas-fired power plant, and the processor chamber is coupled to a receiving optics that is in optical communication with the outgoing optics and that receives the multiplexed laser output fired through the processor room do. Here, a sending side alignment mechanism for focusing the light by adjusting the output direction of light is connected to the sending optical unit, and a receiving side alignment mechanism for maximizing the light collecting efficiency is connected to the receiving optical unit so as to adjust the optical unit.
However, the conventional sensing apparatus is installed in a state in which the receiving portion of the laser is exposed to a high-temperature environment such as the inside of the combustion chamber, and accordingly, additional equipment for protecting the receiving portion is required, or when the lifetime of the receiving portion is shortened Lt; / RTI >
Also, since the output direction of the laser can be adjusted on the condition that the laser is received in the receiving part of the laser, the alignment function for the emitting part is performed when the emitting part is positioned in a state in which the laser is not received by the receiving part And a phenomenon such as not being able to be performed.
The embodiment of the present invention recognizes the progress direction of the laser on the basis of the vector value through the image information of the laser advancing direction in the combustion chamber, and then automatically aligns the laser emission direction of the laser emitting unit based on the recognition result The present invention also provides a flue gas measuring system having a function of a flue gas.
In addition, according to the embodiment of the present invention, the image information of the laser advancing direction in the combustion chamber is analyzed and the traveling direction of the laser is recognized. Accordingly, even when the emitted laser of the laser emitting portion is not received by the receiving portion such as the optical sensor, A combustion gas measuring system having an automatic light alignment function capable of recognizing a traveling direction and aligning a laser emitting direction based thereon is provided.
In addition, according to the embodiment of the present invention, the image information about the laser advancing direction in the combustion chamber is analyzed and the progress direction of the laser is recognized, and the receiver such as the optical sensor for laser reception is exposed to a high temperature environment such as the inside of the combustion chamber And the laser alignment of the laser emitting portion can be accurately performed without using the optical alignment function.
In addition, embodiments of the present invention provide a combustion gas measuring system having an automatic light alignment function that allows an operator to visually confirm image information about a laser advancing direction in a combustion chamber and to accurately align the laser emitting portion with the laser.
A combustion gas measuring system having an automatic photo-alignment function according to an embodiment of the present invention includes a laser emitting unit installed so that a laser emitting through the inside of a combustion chamber passes through the laser emitting unit, And a controller for analyzing a traveling direction of the laser emitted from the laser emitting unit in the combustion chamber on the basis of an image obtained through the laser advancing image pickup unit, And a laser alignment unit aligning the laser emission direction of the laser emission unit according to the laser emission direction.
The laser progressive image pickup unit may include an image pickup device including a plurality of regularly arranged photodiodes, or a CMOS or CCD.
The laser alignment unit may determine the progress direction of the laser emitted from the laser emission unit in the combustion chamber through an image processing algorithm that recognizes the vector value or the direction of the laser trajectory from the image obtained from the laser progressive image pickup unit have.
The laser aligning unit may determine a traveling direction of the laser beam transmitted to the laser advancing image pickup unit on the basis of regularly arranged laser intensity detection values of the image pickup device, the CMOS, and the CCD.
The laser aligning unit may derive a vector value from the laser intensity sensing values and determine a traveling direction of the laser transmitted through the laser advancing image sensing unit through the vector value.
Further, the laser emitting portion may emit a laser having a wavelength in a range of 350 to 3,000 (nm).
The laser-progressive image sensing unit may be disposed in a state of being perpendicular to the traveling direction of the transmitted laser.
And a display unit for displaying an image obtained through the laser progressive image pickup unit.
The apparatus may further include a laser receiving unit for receiving the laser emitted from the laser emitting unit and a gas information calculating unit for receiving the signal according to the laser reception of the laser receiving unit and calculating the concentration and temperature of the gas in the combustion chamber.
The laser receiving unit may be an optical sensor for converting an electric signal according to a wavelength conversion of a received laser into a digital signal.
The gas information calculation unit may include an algorithm for assigning a digital signal input from the laser receiver to a Fourier transform equation and defining each absorption peak as a function form of a specific frequency and separating it, A Voigt function may be substituted to calculate the concentration and temperature of the gas in the combustion chamber by correcting the line width variation of the absorption signal according to the temperature and integrating the correction.
In addition, when a function of a specific frequency is not generated due to the noise of the digital signal input from the laser receiving unit, a certain period of the digital signal may be designated and the magnitude of the absorption signal appearing in the designated period may be measured as an absolute value of the voltage.
According to the embodiment of the present invention, the laser emission direction of the laser emitting unit can be automatically aligned based on the recognition result based on the vector value based on the traveling direction of the laser through the image information about the laser traveling direction in the combustion chamber, The laser alignment of the laser emitting portion can be accurately performed without exposing the receiving portion such as the optical sensor for receiving the laser to the high temperature environment such as the inside of the combustion chamber.
In addition, since the image information of the laser advancing direction in the combustion chamber is analyzed to recognize the traveling direction of the laser, even if the emitted laser of the laser emitting portion is not received by the receiving portion such as the optical sensor, It becomes possible to align one laser emission direction.
In addition, the operator can visually confirm the image information of the laser advancing direction in the combustion chamber, so that laser alignment of the laser emitting portion can be accurately performed. Therefore, if the apparatus for acquiring the laser image in the combustion chamber even when the laser automatic alignment system is abnormal and the display device are operated normally, the laser emission direction can be accurately aligned.
1 is a conceptual illustration of a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention.
2 is a view showing a recess structure in a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention;
3 is a view showing another arrangement of recesses in a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention;
FIGS. 4 and 6 are views showing an example of obtaining a laser image in a combustion chamber in a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention
7 is a conceptual illustration of a basic principle for measuring the gas concentration in the combustion chamber
8 is a graphical representation of the basic principle for measuring the gas concentration in the combustion chamber
9 is a graphical representation of a basic principle for measuring the temperature of a gas in a combustion chamber
10 is a graph showing the first experiment data in which the temperature of the gas in the combustion chamber is measured
11 is a view illustrating a wavelength region according to the first experimental data of Fig. 10
12 is a graph showing the second experimental data in which the temperature of the gas in the combustion chamber is measured
13 is a view illustrating a wavelength region according to the second experimental data of Fig. 12
14 is a graph showing the third experiment data in which the temperature of the gas in the combustion chamber is measured
Fig. 15 is a view illustrating a wavelength region according to the third experimental data of Fig. 14
16 is a view illustrating a linewidth variation mechanism for measuring the temperature and concentration of gas in the combustion chamber
17 is a diagram illustrating an equation algorithm for correcting a line width variation of a signal according to temperature;
FIG. 18 is a diagram illustrating the result of application of the mathematical algorithm according to FIG. 17; FIG.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the position or arrangement of the individual components within each described embodiment may be varied without departing from the spirit and scope of the present invention.
The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which the claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.
While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.
Whenever an element is referred to as " including " an element throughout the description, it is to be understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. In addition, "... "... Module " or the like means a unit for processing at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.
1 to 18, a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention will be described.
1 is a conceptual illustration of a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention.
As shown in the figure, a combustion
The
The laser advancing
2 shows an example of a laser progressive
1, the laser advancing
In this embodiment, the laser advancing
1, the
Here, the
The
Referring to FIGS. 4 to 6, FIGS. 4 to 6 are views showing an example of obtaining a laser image in a combustion chamber in a combustion gas measurement system having an automatic photo-alignment function according to an embodiment of the present invention.
1, carbon particles that are not completely combusted, inorganic ash, and various other particles are mixed in the
That is, the laser image captured through the laser
That is, in order to observe the light, the light must reach the observer (the human eye, the photodetector, etc.), and therefore, in the case where the laser is irradiated in a certain direction in the closed space, Thus, the laser advances along the traveling path, so that the trajectory of the laser can not be observed at a position deviated from the traveling path of the traveling laser.
4 and FIG. 6, FIG. 4 confirms that the laser is emitted in the 1 o'clock direction in the
More specifically, referring to FIG. 5, the light intensity detection value for each
In FIG. 5, it is illustrated that the magnitude (scalar amount) of the vector value is 9 and the direction is 1 o'clock.
According to the above-described configuration, the combustion
In addition, it provides an advantage that laser alignment of the
1, the
The
The gas
Here, the gas
When the function of the specific frequency is not generated due to the noise of the digital signal input from the
The absorption wavelength of light for calculating the temperature through the algorithm of the gas
Wavelength region 1 = λ 1 = 7079.17629㎝ -1, λ 2 = 7079.85512㎝ -1;
Wavelength range 2 = λ 1 = 6799.37218㎝ -1, λ 1-1 = 6799.64883㎝ -1,
? 2 = 6800.98291 cm -1 ;
Wavelength range 3 = λ 1 = 6890.45256cm -1, λ 2 = 6890.94662cm -1,
FIGS. 7 to 18 illustrate a process of calculating the concentration and temperature of a gas in a combustion chamber through a combustion gas measuring system having an automatic photo-alignment function according to an embodiment of the present invention. .
FIG. 7 is a diagram conceptually illustrating the basic principle for measuring the gas concentration in the combustion chamber, FIG. 8 is a diagram illustrating by numerical expression a basic principle for measuring the gas concentration in the combustion chamber, and FIG. 9 is a graph showing the temperature measurement of the gas in the combustion chamber As a formula. ≪ / RTI >
FIGS. 10 to 15 are diagrams illustrating the first experiment data to the third experiment data, in which the temperature of the gas in the combustion chamber is measured, and the wavelength ranges corresponding to the first experiment data to the third experiment data, respectively.
16 is a diagram illustrating a linewidth variation mechanism for measuring the temperature and concentration of gas in the combustion chamber.
17 is a diagram illustrating an equation algorithm for correcting a line width variation of a signal according to a temperature, and FIG. 18 is a diagram illustrating an application result of the equation algorithm according to FIG.
1 to 18, the combustion gas measuring system having the automatic photo-aligning function according to the embodiment of the present invention can measure the laser light intensity of the corresponding laser through the image information about the laser advancing direction in the combustion chamber. It is possible to automatically align the laser emitting direction of the laser emitting portion based on the recognition result based on the vector value of the traveling direction. Therefore, the receiving portion such as the optical sensor for laser receiving can be exposed to the high temperature environment such as the inside of the combustion chamber So that the laser alignment of the laser emitting portion can be accurately performed.
In addition, since the image information of the laser advancing direction in the combustion chamber is analyzed to recognize the traveling direction of the laser, even if the emitted laser of the laser emitting portion is not received by the receiving portion such as the optical sensor, Thereby enabling alignment of one laser emission direction.
Also, it is possible to precisely align the laser emission part with the naked eye while confirming the visual information of the laser advancing direction in the combustion chamber, thereby obtaining the laser image in the combustion chamber even when the laser automatic alignment system is abnormal. When the display device is normally operated, the emission direction of the laser can be accurately aligned.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments or constructions. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described above, and all of the equivalents or equivalents of the claims, as well as the claims, will be included in the scope of the present invention.
100: Combustion gas measurement system with automatic optical alignment
110: laser emitting portion
120: laser progressive image pickup unit
121: Image pickup device
122: photodiode
123: reflector
130: laser alignment unit
140:
150: laser receiver
160: Gas information calculation unit
200: Combustion chamber
Claims (12)
A laser progress image capturing unit configured to be positioned in a straight direction of the laser emitted from the laser emitting unit and to acquire an image for determining the traveling direction of the laser in the combustion chamber through the emitted laser of the laser emitting unit;
Even if the malfunction occurs in the combustion gas measurement system with the automatic optical alignment function or the function of recognizing the vector value of the laser does not operate normally due to an abnormality in the laser alignment unit, A display unit for displaying an image obtained through the laser progressive image pickup unit so as to be able to confirm the image;
An optical sensor for receiving the laser emitted from the laser emitting unit and converting the electrical signal according to the wavelength conversion of the received laser beam into a digital signal, A receiving unit;
A gas information calculation unit that receives a signal according to laser reception by the laser receiver and calculates a concentration and a temperature of the gas in the combustion chamber; And
And a laser alignment unit for analyzing the traveling direction of the laser emitted from the laser emitting unit in the combustion chamber on the basis of an image obtained through the laser advancing image pickup unit and aligning the laser emitting direction of the laser emitting unit according to the analysis result,
Wherein the laser progressive image sensing unit includes an image sensing device including a plurality of regularly arranged photodiodes or a CMOS or a CCD,
Wherein the laser alignment unit determines an advance direction of the laser emitted from the laser emission unit in the combustion chamber through an image processing algorithm that recognizes a vector value or direction of the laser trajectory from the image obtained from the laser progress image pickup unit, A vector value is derived from regularly arranged laser intensity detection values of any one of an image pickup device, a CMOS, and a CCD to determine the traveling direction of the laser transmitted through the vector image,
Wherein the gas information calculation unit includes an algorithm for substituting a digital signal input from the laser receiving unit into a Fourier transform equation and defining each absorption peak as a function form of a specific frequency and separating it, And an algorithm for calculating a concentration and a temperature of the gas in the combustion chamber by integrating a line width variation of an absorption signal according to a temperature by integrating a Voigt function, And an algorithm for calculating a concentration and a temperature of the gas in the combustion chamber by using a size of an absorption signal appearing in a designated section by designating a predetermined section of the digital signal when a function of a specific frequency is not generated, Flue gas measurement system with alignment function.
Wherein the laser emitting unit emits a laser having a wavelength in a range of 350 to 3,000 (nm).
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| WO2019045138A1 (en) * | 2017-08-30 | 2019-03-07 | 한국생산기술연구원 | Alignment system for tdlas for simultaneously measuring multicomponent gas |
| CN109030363A (en) * | 2018-08-17 | 2018-12-18 | 杭州因诺维新科技有限公司 | A kind of laser gas analyzer |
| KR102118280B1 (en) * | 2019-02-15 | 2020-06-02 | 동아대학교 산학협력단 | Method and apparatus for determining optimized parameters for simultaneously 2 dimensional measurment of temperature and concentration distribution of gas based on tomography |
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| JP2002054989A (en) * | 2000-08-14 | 2002-02-20 | Kawasaki Heavy Ind Ltd | Laser beam measuring device and control device |
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| JP3414318B2 (en) | 1999-04-28 | 2003-06-09 | トヨタ自動車株式会社 | Combustion control device for internal combustion engine |
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| KR101507416B1 (en) * | 2012-12-07 | 2015-04-07 | (주)희스테크 | Apparatus and method for measuring gas |
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| JP2001523818A (en) * | 1997-11-14 | 2001-11-27 | アメリカン アイアン アンド スティール インスティチュート | Method and apparatus for sensing off-gas composition |
| JP2002054989A (en) * | 2000-08-14 | 2002-02-20 | Kawasaki Heavy Ind Ltd | Laser beam measuring device and control device |
| KR101493198B1 (en) * | 2014-06-20 | 2015-02-13 | 주식회사 아이스기술 | Automatic optical alignment device for laser absorption spectroscopy gas analyser |
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