A method and system for detecting wall radiation information through flame penetration

Abstract

This invention discloses a method and system for detecting wall radiation information through flame penetration. The method determines the radiation wavelength range, and within this range, establishes a wall radiation intensity detection model and a flame radiation intensity detection model, showing the distribution of wall radiation intensity and flame radiation intensity with radiation wavelength. It also obtains the radiation wavelength λ when the wall radiation intensity equals the flame radiation intensity. eq The peak wavelength λ when the wall radiation intensity is at its maximum. max When the radiation wavelength λ eq Less than the peak wavelength λ max At that time, the wavelength for detecting wall radiation information is the peak wavelength λ. max When the radiation wavelength λ eq Greater than the peak wavelength λ max At that time, the wavelength for detecting wall radiation information is the radiation wavelength λ. eq The wall radiation information is detected according to the detection wavelength determined above. The present invention finds a suitable band range for wall radiation detection by accurately quantifying wall radiation and flame radiation, and can obtain wall radiation information by penetrating the flame.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of combustion detection, and particularly relates to a method and system for detecting wall surface radiation information through a flame. BACKGROUND

[0002] Combustion refers to a process in which two components, fuel and oxidant, occur in space and intensely release heat. Combustion is closely related to industrial processes, is a main driving force for human technological progress, and is an important object of basic scientific research. Combustion is a complex process controlled by multiple physical and chemical factors, and combustion science is not a comprehensive and systematic quantitative science. Developing combustion measurement technology is an important foundation for carrying out basic research on combustion processes, developing advanced combustion technology, and effectively controlling industrial combustion processes.

[0003] Combustion can be divided into modes with and without flames, and a flame is an external manifestation of a combustion reaction. Flame radiation includes thermal radiation and chemiluminescence radiation, in which thermal radiation is from spectral bands of some combustion products with stable chemical properties in the flame, such as infrared spectral bands of CO2 and H2O, CH and OH free radicals, and soot (carbon particles continuous spectrum). Radiation is a phenomenon in which electromagnetic waves transfer energy. In theory, the electromagnetic wavelength of thermal radiation of an object can include the entire spectrum, i.e., the wavelength ranges from zero to infinity. However, in the temperature range encountered in industry, i.e., below 3000 K, the thermal radiation wavelength of practical significance is between 0.38 and 100 μm.

[0004] Combustion detection technologies based on flame thermal radiation are widely used, such as radiation image processing methods, infrared pyrometers, and spectrometers. The principle of these technologies is to use a detector to capture radiation intensity information at the boundary of a furnace, and then convert the information into charge information proportional to the light intensity through a photosensitive element. The current radiation detection method is mainly aimed at high-temperature flame objects, and generally ignores radiation from low-temperature walls. However, in some special application scenarios, such as steel billets in heating furnaces, furnace tubes in tube furnaces, and water-cooled walls in power station boilers, the surface temperature needs to be monitored in detail. However, the radiation energy information of such solid walls is much smaller than that of the flame and cannot be identified by the detector, which greatly restricts the observation, measurement, and temperature control of such solid walls.

[0005] For example, Figure 1As shown, according to Planck's law and Wien's displacement law, when the temperature of an object decreases, the maximum radiation wavelength thereof moves to the infrared region. When the wall surface temperature is lower than the flame temperature, in order to penetrate the flame to obtain the wall surface radiation information, it is necessary to avoid the wavelength range of the flame radiation and find a suitable detection wavelength range near the maximum radiation wavelength of the wall surface. However, in a detection object such as a boiler, the wall surface is covered by the flame, and the flame is a complex absorption-emission-scattering mixed medium. The non-continuous absorption-emission of water and carbon dioxide and the like, the continuous emission-scattering absorption of ash and carbon black and the like, and the continuous emission-reflection of the wall surface are coupled and interfered with each other. The existing method cannot accurately quantify the wall surface radiation and the flame radiation, and thus it is difficult to accurately define the wavelength range suitable for the wall surface radiation detection. SUMMARY

[0006] In order to solve the problems in the prior art, the present application provides a method and system for penetrating the flame to detect the wall surface radiation information, which can accurately quantify the wall surface radiation and the flame radiation, find the wavelength range suitable for the wall surface radiation detection, and obtain the wall surface radiation information by penetrating the flame.

[0007] To achieve the above object, the present application provides the following technical scheme: a method for penetrating the flame to detect the wall surface radiation information, and the specific steps are as follows:

[0008] S1 determining a radiation wavelength range, and establishing a wall surface radiation intensity detection model and a flame radiation intensity detection model of the wall surface radiation intensity and the flame radiation intensity distribution with the radiation wavelength in the radiation wavelength range;

[0009] S2 obtaining the radiation wavelength at which the wall surface radiation intensity is equal to the flame radiation intensity and the peak wavelength at which the wall surface radiation intensity value is maximum according to the wall surface radiation intensity detection model and the flame radiation intensity detection model λ eq λ max

[0010] S3 determining the detection wavelength when the wall surface radiation intensity is greater than or equal to the flame radiation intensity, and specifically: when the radiation wavelength λ eq is less than the peak wavelength λ max , the wavelength for detecting the wall surface radiation information is the peak wavelength λ max ; when the radiation wavelength λ eq is greater than the peak wavelength λ max , the wavelength for detecting the wall surface radiation information is the radiation wavelength λ eq

[0011] ​​​S4 detects the wall surface radiation information according to the detection wavelength determined in S3.

[0012] Further, in S1, the value range of the radiation wavelength is 0 μm ~ 10 μm.

[0013] Further, in S1, the specific steps for establishing the wall surface radiation intensity detection model are as follows:

[0014] S1.1 determines the position of the detection boundary point O, and obtains the energy share of the wall surface detected per unit area and unit angle at the detection boundary point O;

[0015] S1.2 establishes the wall surface radiation intensity detection model of the wall surface radiation intensity distribution along the radiation wavelength by using the energy share of the wall surface detected per unit area and unit angle at the detection boundary point O, the physical distance from the wall surface to the detection boundary point O, the flame extinction coefficient, the wall surface temperature, the wall surface emissivity, and the wall surface area, specifically as follows:

[0016] (2)

[0017] In the formula, λ represents the radiation wavelength, μm; I λ ( w , s ) represents the wall surface radiation intensity of the wall surface radiation reaching the detection boundary point O, W·m -3 ·sr -1 ; λ β l l w ε T w

[0018] Further, the wall surface radiation intensity includes the energy of the wall surface emission scattered by the flame, the energy of the wall surface emission reflected by the wall surface, and the radiation energy directly emitted by the wall surface, wherein the energy of the wall surface emission scattered by the flame is the energy share of the energy of the wall surface emission scattered by the flame detected per unit area and unit angle at the detection boundary point O R d ( w,v,s ) and the product of the flame extinction coefficient, the wall surface temperature, and the wall surface emissivity are integrated along the product of the physical distance from the wall surface to the detection boundary point O and the wall surface area, and the formula is as follows:

[0019]

[0020] ​​​​​​The energy emitted by the wall and reflected by the wall is the energy emitted by the wall and reflected by the wall detected at the detection boundary point O per unit area, per unit angle R d ( w,w,s ) and the integral of the product of the flame extinction coefficient, the wall temperature, and the wall emissivity along the wall area, as follows:

[0021]

[0022] The radiant energy directly emitted by the wall is the product of the flame extinction coefficient, the wall temperature, and the wall emissivity, as follows:

[0023] .

[0024] Further, in S1, the specific steps for establishing the flame radiation intensity detection model are as follows:

[0025] S1.3 Determine the position of the detection boundary point O to obtain the energy fraction of the flame detected at the detection boundary point O per unit area, per unit angle;

[0026] S1.4 Use the energy fraction of the flame detected at the detection boundary point O per unit area, per unit angle, the physical distance from the flame to the detection boundary point O, the flame extinction coefficient, the flame absorption coefficient, the flame temperature, and the flame volume to establish the flame radiation intensity detection model of the flame radiation intensity with respect to the radiation wavelength, specifically as follows:

[0027] (3)

[0028] In the formula, I λ ( v , s ) represents the flame radiation intensity of the flame radiation reaching the detection boundary point O, W·m -3 ·sr -1 ; λ represents the radiation wavelength, μm; β represents the extinction coefficient of the flame, k represents the absorption coefficient of the flame, m -1 ; l represents the physical distance from the detection boundary point O to the flame, m; T f represents the approximate temperature of the flame, K.

[0029] Further, the flame radiation intensity includes the energy emitted by the flame and scattered by the flame, the energy emitted by the flame and reflected by the wall, and the radiant energy directly emitted by the flame, wherein the energy emitted by the flame and scattered by the flame is the energy fraction of the energy emitted by the flame and scattered by the flame detected at the detection boundary point O per unit area, per unit angleR d v,v,s ) and the product of the flame extinction coefficient, the flame absorption coefficient and the flame temperature along the physical distance of the flame to the detection boundary point O and the integral of the flame volume, the formula is as follows:

[0030]

[0031] The energy fraction of the flame emission reflected by the wall surface detected at the detection boundary point O per unit area and per unit angle R d (v ,w,s ) and the product of the flame extinction coefficient, the flame absorption coefficient and the flame temperature along the physical distance of the flame to the detection boundary point O and the integral of the flame volume, the formula is as follows:

[0032]

[0033] The radiant energy directly emitted by the flame is the product of the flame extinction coefficient, the flame absorption coefficient and the flame temperature, the formula is as follows:

[0034] .

[0035] Further, in S2, the flame radiation intensity obtained by the flame radiation intensity detection model is equal to the wall surface radiation intensity obtained by the wall surface radiation intensity detection model, and the radiation wavelength λ eq is obtained; the derivative of the radiation wavelength λ is obtained on both sides of the wall surface radiation intensity detection model and is equal to zero, and the peak wavelength I λ ( w , s ) is obtained. λ max .

[0036] Further, the energy fraction is obtained by using the Monte Carlo method.

[0037] The present application also provides a detection system for penetrating flame to detect wall surface radiation information, which comprises a detector and a filter arranged in front of the detector, the detection objects are flame and wall surface, the detector is installed at the detection boundary point O, the center of the filter has a wavelength equal to the detection wavelength determined in the method for penetrating flame to detect wall surface radiation information, and the monochromatic deviation of the filter is less than ±1 μm.

[0038] Further, the photosensitive wavelength band of the detector contains the detection wavelength determined in the method for penetrating flame to detect wall surface radiation information.

[0039] Compared with the prior art, the present application has at least the following beneficial effects: ​

[0040] The present application provides a method for detecting wall surface radiation information through flame, by establishing a detection model of radiation wavelength and flame radiation intensity and wall surface radiation intensity, the model can be used to accurately obtain the best detection wavelength for avoiding flame radiation to obtain wall surface radiation information, so as to realize the detection of wall surface radiation information through flame, which greatly expands the application field of traditional radiation detection method, realizes the on-line monitoring of billets in heating furnace, furnace tube in tube furnace, water-cooled wall and slagging in power station boiler, and has good application prospect.

[0041] The traditional optical detector has complex structure and high price, especially the near-infrared wave band and the middle-infrared wave band detector, which are currently dependent on import and can only be used in laboratory environment. The present application determines the best wall surface radiation information detection wavelength through the detection model and uses the detection wavelength as the selection basis of the filter and the detector, which can break the dependence on the detector, reduce the equipment cost, and be applied to harsh industrial environment. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The schematic diagram of Planck's law and Wien's displacement law described in the present application;

[0043] Figure 2 The principle diagram of the method described in the present application.

[0044] Figure 3 The graph of the flame and wall surface radiation intensity received by the detector changing with wavelength when the flame temperature is 1200℃ and the wall surface temperature is 600℃.

[0045] Figure 4 The graph of the flame and wall surface radiation intensity received by the detector changing with wavelength when the flame temperature is 1000℃ and the wall surface temperature is 600℃.

[0046] Figure 5 The detection result graph of the detection method described in the present application, wherein Figure 5 a is the image taken by other detector and filter combination, Figure 5 b is the image taken by the detector and filter combination using the present application.

[0047] In the figure: 1-detector, 2-filter, 3-flame, 4-wall surface, 5-physical distance of the detector to the flame, 6-physical distance of the detector to the wall surface, 7-radiation energy directly emitted by the flame, 8-energy emitted by the flame and scattered by the flame, 9-radiation energy directly emitted by the wall surface, 10-energy emitted by the wall surface and reflected by the wall surface. DETAILED DESCRIPTION

[0048] The present application will be further described in detail below in combination with the drawings and specific embodiments, which are the explanation of the present application rather than limitation.

[0049] As Figure 2 shown, the present application provides a method for detecting the radiation information of a wall surface through a flame, comprising the following steps:

[0050] 1. Determine the installation position of the detector 1 according to the application scene, i.e. the detection boundary point O, and the physical distance from the detection boundary point O to the flame 3 l , the physical distance from the detection boundary point O to the wall surface 4 l w ;

[0051] Determine the approximate temperature of the flame 3 according to the application scene T f , the approximate temperature of the wall surface 4 T w ;

[0052] Determine the wall surface emissivity ε according to the wall surface material and temperature, and determine the flame extinction coefficient β , the flame absorption coefficient k and the scattering coefficient σ of the flame according to the type of the flame.

[0053] 2. The radiation energy received by the detector 1 in any s line-of-sight direction I λ ( O , s ) is mainly composed of the flame radiation intensity I λ ( v , s ) of the flame radiation reaching the detector 1 and the wall surface radiation intensity I λ ( w , s ) of the wall surface radiation reaching the detector 1, as shown in formula (1), which respectively represents the radiation energy from the flame 3 and the wall surface 4 that can be detected at the detection boundary point O:

[0054] (1)

[0055] 2.1 The flame radiation will be absorbed and reflected by the wall surface 4, and at the same time, the wall surface radiation will be absorbed and scattered by the flame 3, and the two are coupled with each other. The Monte Carlo method is used to decouple and solve the intensity distribution of the wall surface radiation and the flame radiation at the boundary to establish a wall surface radiation intensity detection model and a flame radiation intensity detection model, as shown in formulas (2) and (3), and the specific process is as follows:

[0056] 2.1.1. Select the calculation radiation wavelength λ The radiation wavelength interval of industrial high-temperature processes is generally located at 0~10μm, so the radiation wavelength λThe calculation interval is 0-10 μm.

[0057] 2.1.2. The energy fraction of the energy emitted by the wall and scattered by the flame that is detected at the detection boundary point O per unit area and per unit angle R d w,v,s R d w,w,s R d v,v,s R d (v ,w,s ).

[0058] 2.1.3. A wall radiation intensity detection model for the distribution of wall radiation intensity with radiation wavelength is established using the energy fraction of the energy detected at the detection boundary point O per unit area and per unit angle, the physical distance from the wall 4 to the detection boundary point O, the flame extinction coefficient, the wall temperature, the wall emissivity, and the wall area, and specifically:

[0059] (2)

[0060] In the formula, I λ w s represents the wall radiation intensity of the wall radiation reaching the detection boundary point O, W·m -3 ·sr -1 ; λ represents the radiation wavelength, μm; β represents the extinction coefficient of the flame 3; l represents the physical distance from the detection boundary point O to the flame 3, m; l w represents the distance from the detection boundary point O to the wall 4, m; ε represents the wall emissivity; T w represents the approximate temperature of the wall 4, K.

[0061] In the above formula, the wall radiation intensity is obtained by adding the energy of the wall emission scattered by the flame, the energy of the wall emission reflected by the wall, and the energy of the direct emission of the wall, and specifically:

[0062] ​​​​​​​​The energy emitted by the flame and scattered by the wall is equal to R d ( w,v,s ) and the product of the flame extinction coefficient, the wall temperature, and the wall emissivity integrated along the path l w and the wall area.

[0063] The energy emitted by the wall and reflected by the wall is equal to R d ( w,w,s ) and the product of the flame extinction coefficient, the wall temperature, and the wall emissivity integrated along the path

[0064] The energy directly emitted by the wall is equal to the product of the flame extinction coefficient, the wall temperature, and the wall emissivity.

[0065] 2.1.4. A flame radiation intensity detection model is established using the proportion of the energy detected by the flame 3 at the detection boundary point O per unit area and per unit angle, the physical distance from the flame 3 to the detection boundary point O, the flame extinction coefficient, the flame absorption coefficient, the flame temperature, and the flame volume, specifically:

[0066] (3)

[0067] In the formula, I λ ( v , s ) represents the flame radiation intensity of the flame radiation reaching the detector 1, W·m -3 ·sr -1 ; λ represents the radiation wavelength, μm; β represents the extinction coefficient of the flame 3, k represents the absorption coefficient of the flame 3, m -1 ; l represents the physical distance from the detection boundary point O to the flame 3, m; T f represents the approximate temperature of the flame 3, K.

[0068] In the above formula, the flame radiation intensity is obtained by adding the energy emitted by the flame and scattered by the flame, the energy emitted by the flame and reflected by the wall, and the energy directly emitted by the flame, wherein:

[0069] The energy emitted by the flame and scattered by the flame is equal to R d ( v,v,s ) and the product of the flame extinction coefficient, the flame absorption coefficient, and the flame temperature integrated along the path l and the flame volume.

[0070] The energy reflected by the wall surface is equal to R d ( v,w,s ) and the integral of the product of the flame extinction coefficient, the flame absorption coefficient and the flame temperature along the flame volume;

[0071] The radiant energy directly emitted by the flame is equal to the product of the flame extinction coefficient, the flame absorption coefficient and the flame temperature;

[0072] 2.2 Update the wavelength parameter Repeat the above model calculation process to obtain the curves of the wall surface radiation intensity and the flame radiation intensity varying with the radiation wavelength.

[0073] 3. According to the formula (2) and the formula (3), the wall surface radiation intensity I λ ( w , s ) is equal to the radiation wavelength I λ ( v , s ) when the flame radiation intensity λ eq ;

[0074] Derive the radiation wavelength λ on both sides of the formula (2) and let it equal to zero, as the formula (4), to obtain the peak wavelength I λ ( w , s ) that makes the wall surface radiation intensity λ max .

[0075] (4)

[0076] 4. Determine the detection wavelength when the wall surface radiation intensity I λ ( w , s ) is greater than or equal to the flame radiation intensity I λ ( v , s ):

[0077] When the radiation wavelength λ eq is less than the peak wavelength λ max , the wavelength for detecting the wall surface radiation information is the peak wavelength λ max ;

[0078] When the radiation wavelength λ eq is greater than the peak wavelength λmax At that time, the wavelength for detecting wall radiation information is the radiation wavelength. λ eq , radiation wavelength λ eq With peak wavelength λ max The difference is ∆λ.

[0079] Peak wavelength is related to wall temperature: such as Figure 3 As shown, when the flame temperature is 1200℃ and the wall temperature is 600℃, the peak wavelength is... λ max Equal to 3.2μm, radiation wavelength λ eq The wavelength is 3.4 μm, and ∆λ is equal to 0.2 μm. λ eq At a wavelength of 3.4 μm, wall radiation begins to exceed flame radiation. At a wall temperature of 600℃, the peak wavelength... λ max It equals 3.2μm.

[0080] by Figure 4 As shown, when the flame temperature is 1000℃ and the wall temperature is 600℃, the peak wavelength is... λ max Equal to 3.2 μm, radiation wavelength λ eq The value is 2.1 μm, and ∆λ equals 0 μm. When the peak wavelength... λ max When the thickness is equal to 3.2 μm, the wall radiation is greater than the flame radiation.

[0081] 5. Select a filter whose center passes through a wavelength equal to the detection wavelength determined above. The monochromatic deviation of the filter should be less than ±1μm, and the detector's photosensitive band should include the detection wavelength determined above. Finally, combine the specially selected detector and filter to detect flames and walls. The actual results are as follows: Figure 5 As shown, Figure 5 Image a is an image captured by other detector and filter combinations. Figure 5 b is an image captured by the detector and filter using the aforementioned combination, which allows clear wall information to be observed through the flame.

[0082] The present application also provides a detection system for detecting the radiation information of a wall surface through a flame, comprising a detector 1 and a filter 2 selected according to the detection wavelength determined by the above method, the filter 2 being installed in front of the detector 1, the objects to be detected being a flame 3 and a wall surface 4, wherein the flame 3 is located between the filter 2 and the wall surface 4 and completely covers the wall surface 4. The shape of the wall surface 4 includes a plane, a cylinder or other shapes. The detector 1 is arranged at the boundary of a furnace, the physical distance 5 from the detector to the flame and the physical distance 6 from the detector to the wall surface are related to the installation position of the detector 1. The image captured by the detector is essentially the photoelectric effect of the flame radiation and the wall surface radiation on the imaging target surface, wherein the flame radiation includes the energy 8 scattered by the flame, the energy reflected by the wall surface and the radiation energy 7 directly emitted by the flame, and the wall surface radiation includes the energy scattered by the flame, the energy 10 reflected by the wall surface and the radiation energy 9 directly emitted by the wall surface.

Claims

1. A method of detecting information radiated from a wall surface through a flame, characterized by, The specific steps are as follows: S1 determines a radiation wavelength range, and establishes a wall surface radiation intensity detection model and a flame radiation intensity detection model of wall surface radiation intensity and flame radiation intensity distribution with respect to the radiation wavelength in the radiation wavelength range; S2 obtains the radiation wavelength when the wall surface radiation intensity is equal to the flame radiation intensity according to the wall surface radiation intensity detection model and the flame radiation intensity detection model λ eq , and the peak wavelength when the wall surface radiation intensity value is maximum λ max ; S3 when the radiation wavelength λ eq is less than the peak wavelength λ max , the wavelength for detecting the wall surface radiation information is the peak wavelength λ max ; when the radiation wavelength λ eq is greater than the peak wavelength λ max , the wavelength for detecting the wall surface radiation information is the radiation wavelength λ eq ; S4 detects the wall surface radiation information according to the detection wavelength determined in S3.

2. A method of detecting information radiated from a wall surface through a flame according to claim 1, wherein In S1, the value range of the radiation wavelength is 0 μm to 10 μm.

3. A method of detecting information radiated from a wall surface through a flame according to claim 1, wherein In S1, the specific steps for establishing the wall surface radiation intensity detection model are as follows: S1.1 determines the position of the detection boundary point O to obtain the energy share of the wall surface (4) detected in unit area and unit angle at the detection boundary point O; S1.2 establishes the wall surface radiation intensity detection model of the wall surface radiation intensity distribution with respect to the radiation wavelength by using the energy share of the wall surface (4) detected in unit area and unit angle at the detection boundary point O, the physical distance from the wall surface (4) to the detection boundary point O, the flame extinction coefficient, the wall surface temperature, the wall surface emissivity and the wall surface area, and the specific steps are as follows: wherein I λ w s represents the wall surface radiation intensity at which the wall surface radiation reaches the detection boundary point O; λ represents the radiation wavelength; β represents the extinction coefficient of the flame (3); l represents the physical distance from the detection boundary point O to the flame (3); l w represents the distance from the detection boundary point O to the wall surface (4); ε represents the wall surface emissivity; T w represents the approximate temperature of the wall surface (4); R d w,v,s represents the energy fraction of the wall surface emission scattered by the flame that is detected at the detection boundary point O per unit area and per unit angle.​​​ R d ( w,w,s ) is the fraction of the energy emitted by the wall and reflected by the wall that is detected at the detection boundary point O per unit area and per unit angle.

4. A method of detecting information radiated from a wall surface through a flame according to claim 3, wherein The wall surface radiation intensity includes energy scattered by the flame from the wall surface emission, energy reflected by the wall surface from the wall surface emission, and radiation energy directly emitted by the wall surface, wherein the energy scattered by the flame from the wall surface emission is the proportion of energy detected at the detection boundary point O per unit area and per unit angle from the energy scattered by the flame from the wall surface emission R d ( w,v,s )and the product of the flame extinction coefficient, the wall surface temperature, and the wall surface emissivity, the integral of the physical distance from the wall surface (4) to the detection boundary point O and the wall surface area, and the formula is as follows: Wall surface emitted energy reflected by wall surface Wall surface emitted energy reflected by wall surface Energy fraction detected per unit area, per unit angle at detection boundary point O R d ( w,w,s ) and the product of the flame extinction coefficient, wall surface temperature, and wall surface emissivity integrated along the wall surface area, as follows: The radiation energy directly emitted by the wall surface is the product of the flame extinction coefficient, the wall surface temperature and the wall surface emissivity, and the formula is as follows: 。 5. The method of penetrating flame-detecting wall radiation information according to claim 1, characterized in that, In S1, the specific steps for establishing the flame radiation intensity detection model are as follows: S1.3 determines the position of the detection boundary point O to obtain the energy share of the flame (3) detected in unit area and unit angle at the detection boundary point O; S1.4 establishes the flame radiation intensity detection model of the flame radiation intensity with respect to the radiation wavelength by using the energy share of the flame (3) detected in unit area and unit angle at the detection boundary point O, the physical distance from the flame (3) to the detection boundary point O, the flame extinction coefficient, the flame absorption coefficient, the flame temperature and the flame volume, and the specific steps are as follows: wherein I λ v s represents the intensity of the flame radiation reaching the detection boundary point O; λ represents the wavelength of the radiation; β represents the extinction coefficient of the flame (3), k represents the absorption coefficient of the flame (3); l represents the physical distance from the detection boundary point O to the flame (3); T f represents the approximate temperature of the flame (3), R d w,v,s represents the proportion of the energy emitted by the wall surface and scattered by the flame which is detected at the detection boundary point O per unit area and per unit angle;​​​ R d ( w,w,s ) is the fraction of the energy emitted by the wall and reflected by the wall that is detected at the detection boundary point O per unit area and per unit angle.

6. A method of detecting information radiated from a wall surface through a flame according to claim 5, wherein The flame radiation intensity includes energy emitted by the flame and scattered by the flame, energy emitted by the flame and reflected by the wall, and radiation energy directly emitted by the flame, wherein the energy emitted by the flame and scattered by the flame is the proportion of energy detected by the unit area and unit angle at the detection boundary point O R d ( v,v,s )and the product of the flame extinction coefficient, the flame absorption coefficient, and the flame temperature, the integral of the physical distance from the flame (3) to the detection boundary point O and the volume of the flame, and the formula is as follows: flame emission reflected by the wall energy detected at the detection boundary point O per unit area, per unit angle R d (v ,w,s ) and the product of the flame extinction coefficient, the flame absorption coefficient, the flame temperature integrated along the flame volume, as follows: The radiation energy directly emitted by the flame is the product of the flame extinction coefficient, the flame absorption coefficient and the flame temperature, and the formula is as follows: 。 7. A method of penetrating flame detecting wall radiation information according to claim 1, wherein In S2, the flame radiation intensity detection model is used to obtain the flame radiation intensity, and the wall surface radiation intensity detection model is used to obtain the wall surface radiation intensity, and the radiation wavelength is obtained by equating the flame radiation intensity and the wall surface radiation intensity λ eq ; In The model of wall surface radiation intensity detection is derived with respect to the radiation wavelength λ on both sides and set to zero to obtain the peak wavelength of the maximum wall surface radiation intensity I λ ( w , s ) maximum peak wavelength λ max .

8. A method of penetrating a flame detection wall surface radiation information according to any one of claims 3-6, characterized in that, The energy share is obtained by using the Monte Carlo method.

9. A detection system for detecting information radiated from a wall surface through a flame, characterized by The detector (1) and the filter (2) arranged in front of the detector are included, the objects for detection are the flame (3) and the wall surface (4), the installation position of the detector (1) is the detection boundary point O, the center of the filter (2) passes through the detection wavelength equal to the detection wavelength determined in the method for penetrating the flame to detect the wall surface radiation information according to claim 1, and the monochromatic deviation of the filter (2) is less than ±1 μm.

10. A system for detecting information radiated from a wall surface through a flame according to claim 9, wherein The photosensitive wavelength band of the detector (1) includes the detection wavelength determined in the method for penetrating the flame to detect the wall surface radiation information according to claim 1.

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