CN110276129B - Method, system and device for controlling equivalence ratio of fuel supplied to combustion furnace based on combustion control system - Google Patents

Method, system and device for controlling equivalence ratio of fuel supplied to combustion furnace based on combustion control system Download PDF

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CN110276129B
CN110276129B CN201910544203.XA CN201910544203A CN110276129B CN 110276129 B CN110276129 B CN 110276129B CN 201910544203 A CN201910544203 A CN 201910544203A CN 110276129 B CN110276129 B CN 110276129B
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杨健晟
龙凯
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Guizhou University
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Abstract

The invention discloses a method, a system and a device for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system, wherein the method comprises the following steps: s1, the combustion control system controls an image acquisition device to shoot and obtain RGB original images of flame colors in the combustion furnace; s2, the combustion control system converts the RGB original image into an RGB image only containing blue-green flame; s3, the combustion control system calculates the B/G value of the converted RGB image; s4, the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and the equivalence ratio of flame color is calculated
Figure DDA0002103488510000011
(ii) a S5, the combustion control system compares the equivalence ratio
Figure DDA0002103488510000012
The fuel to air supply ratio is adjusted according to the set strategy as compared to the set equivalence ratio alpha. The method analyzes the equivalence ratio of flame combustion according to the flame color, and then controls and optimizes the supply of fuel and air.

Description

Method, system and device for controlling equivalence ratio of fuel supplied to combustion furnace based on combustion control system
Technical Field
The invention relates to a method, a system and a device for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system, and belongs to the technical field of optical detection in combustion diagnosis.
Background
The energy supply in China mainly comes from fossil fuel combustion. In a series of industrial production such as thermal power generation, boiler heating, metallurgy and the like, effective supply of fossil fuel and air is controlled by detecting flame in a combustion furnace and judging combustion state, and the method is one of effective means for improving production efficiency and saving cost. Because complete combustion of the fuel directly affects the energy conversion efficiency and greenhouse gases produced by incomplete combustion can also cause damage to the ecological environment. Therefore, how to judge the combustion state of the flame in the furnace by using a detection technology is a key point in industrial production.
The traditional method based on probe sampling not only has hysteresis on detection results, but also is closely related to the position of the probe layout, and the fault rate is always higher because the probe needs to be in direct contact with the reactant. The detection technology based on the laser can avoid contacting with reactants, the detection result has high accuracy due to the high precision of the laser, but the industrial combustion detection technology based on the laser is not popularized in a large scale all the time due to a series of factors such as complex laser light path arrangement, complex operation, high cost, safety problems and the like.
Digital cameras also have a non-contact feature and are therefore also used for in-furnace flame detection. The current common method is to collect flame images through a digital camera, extract information such as flame brightness values and flame frequencies through an image processing technology, and further judge the combustion state. However, such judgment of the combustion state is limited only to the stability of combustion, and information such as the ratio of fuel and air to be mixed and the spatial distribution of the mixture is unknown, so that the supply amount of fuel and air cannot be controlled, and there is a limit to the help of optimizing the energy conversion efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method, the system and the device for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system are provided, so that the technical problems that the existing digital camera flame detection can only judge the combustion stability according to images, cannot analyze the equivalence ratio (the ratio of mixed fuel and air), and further cannot control and optimize the supply quantity of the fuel and the air are solved.
The technical scheme of the invention is as follows:
in a first aspect, the present invention provides a method of controlling a furnace feed fuel equivalence ratio based on a combustion control system, the method comprising:
s1, the combustion control system controls an image acquisition device to shoot and acquire RGB original images of flame colors in the combustion furnace;
s2, the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
s3, the combustion control system calculates the B/G value of the converted RGB image;
s4, the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and the equivalence ratio of flame color is calculated
Figure BDA0002103488490000021
S5, the combustion control system compares the equivalence ratio
Figure BDA0002103488490000022
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000023
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000024
The equivalent ratio alpha is the same.
In a second aspect, the present invention provides an apparatus for controlling the equivalence ratio of a furnace feed fuel based on a combustion control system, the apparatus comprising:
an acquisition module to: the combustion control system controls the image acquisition device to shoot and obtain RGB original images of flame colors in the combustion furnace;
a conversion module to: the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
a first computing module to: the combustion control system calculates the B/G value of the RGB image after conversion;
a second calculation module to: the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and calculates the equivalence ratio of flame color
Figure BDA0002103488490000025
A control module to: the combustion control system compares the equivalence ratio
Figure BDA0002103488490000026
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000027
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000028
The equivalent ratio alpha is the same.
In a third aspect, the present invention provides a system for controlling the equivalence ratio of fuel supplied to a furnace based on a combustion control system, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of:
the combustion control system controls the image acquisition device to shoot and acquire RGB original images of flame colors in the combustion furnace;
the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
the combustion control system calculating the B/G value of the converted RGB image;
the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and calculates the equivalence ratio of flame color
Figure BDA0002103488490000031
The combustion control system compares the equivalence ratio
Figure BDA0002103488490000032
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000033
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000034
The equivalent ratio alpha is the same.
In a fourth aspect, the present invention provides a computer readable storage medium having a computer program stored thereon, wherein the program when executed by a processor implements the steps of:
the combustion control system controls the image acquisition device to shoot and obtain RGB original images of flame colors in the combustion furnace;
the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
the combustion control system calculating the B/G value of the converted RGB image;
the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and calculates the equivalence ratio of flame color
Figure BDA0002103488490000035
The combustion control system compares the equivalence ratio
Figure BDA0002103488490000036
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000037
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000038
The equivalent ratio alpha is the same.
Free radicals are generated due to chemical bond breakage of compounds during combustion reaction of hydrocarbon fuel, and a large number of excited free radicals release photons with specific wavelengths when returning to a ground state, such as 430nm of CH and 516nm of C 2 * And the emitted photons are in direct proportion to the concentration of the free radicals. Research shows that the equivalence ratio can be indirectly measured through the ratio of the concentration of free radicals, and therefore equivalence ratio information can be indirectly obtained through detecting the chemiluminescence intensity of photons with specific wavelengths released by the free radicals. The color is a representation form of wavelength, so that the mixing condition (equivalence ratio) of fuel and air can be indirectly obtained by utilizing the relation of color-spectrum-free radical-equivalence ratio after flame color information is collected, and further the combustion state is judged.
The beneficial effects of the invention are: according to the method, the relation between the B/G value and the equivalence ratio of the RGB image of the flame color is built, the B/G value and the equivalence ratio model of the built image are utilized to measure the flame equivalence ratio, so that the real-time mixing condition of fuel and air is obtained, and the equivalence ratio can be used as a basis to judge the mixing state of the fuel and the air in combustion, so that the technical problems that the combustion stability can be judged only according to the image, the equivalence ratio (the mixing ratio of the fuel and the air) cannot be analyzed, and further the supply quantity of the fuel and the air cannot be controlled and optimized in the conventional digital camera flame detection are effectively solved.
Drawings
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
FIG. 2 is a structural framework diagram of an embodiment of the present invention;
FIG. 3 is a block diagram of yet another apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a computer-readable medium according to an embodiment of the invention.
Detailed Description
The technical scheme in the embodiment of the invention has the following general idea:
acquiring an RGB original image of the flame color to be identified;
converting the RGB original image into an RGB image only containing blue-green flame;
calculating the B/G value of the converted RGB image;
inputting the B/G value into a flame equivalence ratio judgment model, and calculating the equivalence ratio of flame color
Figure BDA0002103488490000041
The equivalent ratio is
Figure BDA0002103488490000042
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000043
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000044
The equivalent ratio alpha is the same.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Example one
The embodiment of the invention provides a method for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system, which comprises the following steps:
s1, the combustion control system controls an image acquisition device to shoot and acquire RGB original images of flame colors in the combustion furnace;
s2, the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
s3, the combustion control system calculates the B/G value of the converted RGB image;
s4, the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and the equivalence ratio of flame color is calculated
Figure BDA0002103488490000051
S5, the combustion control system compares the equivalence ratio
Figure BDA0002103488490000052
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000053
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000054
The equivalent ratio alpha is the same.
It should be noted that the method can be applied to a combustion control system (such as a combustion control system of a gas turbine or a pulse combustor), and can also be applied to a ground station with a computer operation control function (the ground station is a portable box body which is internally provided with an integrated notebook computer), or a remote control terminal (such as a control room and a monitoring room). In other words, the above steps of the embodiment of the present invention include the following steps, which will be described later, and the execution subject of the steps may be a combustion control system, or a ground station having a computer operation function and a portable function, so that the combustion state of the flame can be identified outside the combustion field; or a remote control terminal (such as an operation room, a monitoring room and the like) can be used, so that the combustion state of the combustion field can be identified remotely.
Specifically, the flame combustion state is mainly determined by acquiring a flame image through a digital camera, and then extracting information such as a flame brightness value and a flame frequency by using an image processing technology. However, such judgment of the combustion state is limited only to the stability of combustion, and information on the mixing ratio of fuel and air and the spatial distribution of the mixture is unknown, so that the supply amount of fuel and air cannot be controlled, and there is a limit to the help of optimizing the energy conversion efficiency.
Based on this, the first embodiment of the present invention provides a method for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system, so as to solve the above technical problem.
The method for controlling the equivalence ratio of the fuel supplied to the combustion furnace based on the combustion control system according to the first embodiment of the present invention is described in detail with reference to fig. 1:
s1, the combustion control system controls an image acquisition device to shoot and acquire RGB original images of flame colors in the combustion furnace;
specifically, the image capturing device is used to capture RGB images of flame colors, for example, the image capturing device may be a CCD image sensor or a CMOS image sensor, and in other embodiments, the image capturing device may be any known capturing device capable of capturing RGB images. The image acquisition device is used as a detection element, and can meet the requirements of non-contact, low cost and simple and convenient installation and operation.
S2, the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
for the RGB original images shot by the image acquisition device, due to different spectral response functions, the obtained RGB images may have result deviation, thereby affecting the judgment of subsequent B/G values. Therefore, after the RGB original image is obtained, the RGB original image is corrected to obtain an RGB correction map.
Specifically, the RGB original image is subjected to chromatic aberration correction by utilizing an RGB correction coefficient, and the RGB correction coefficient is obtained by comparing a spectral response curve of an image acquisition device for acquiring the RGB original image with a standard color tristimulus value curve. The specific method comprises the following steps:
1. obtaining a spectral response curve of an image acquisition device
1) The light is stably emitted by a standard light source, such as a tungsten halogen lamp light source.
2) The light emitted by the standard light source passes through the monochromator, and the angle of the prism in the monochromator is adjusted through rotating operation to realize the emission of the light with single specific wavelength.
3) And acquiring the light data emitted by the monochromator through an image acquisition device to obtain an RGB image with the wavelength.
4) And recording and storing the brightness values of the layers of the images R, G and B.
5) And (d) repeating the steps (B), (c) and (d) (by adjusting the monochromator, the brightness value collection of the R, G and B layers corresponding to each wavelength in the visible light spectrum range (380 nm-750 nm, the wavelength interval is 5 nm-10 nm) is realized).
6) And calculating a spectral response curve of the output image acquisition device according to the stored brightness of each layer of R, G and B corresponding to different wavelengths.
2. Determination of RGB correction coefficients
In this embodiment, the color tristimulus value of the CIE1931 standard is used as a standard, and the spectral response curve of the image capturing device used in the calculation is compared with the color tristimulus value curve of the CIE1931 standard to obtain the conversion coefficient of the corrected color. The method comprises the following specific steps:
the conversion rule for converting the RGB mode of the image into the XYZ mode under the CIE standard is as follows:
Figure BDA0002103488490000071
wherein E (λ) represents a spectral power distribution function of the light source;
Figure BDA0002103488490000072
the spectral responsivity of each wave band of R, G and B of the color camera;
Figure BDA0002103488490000073
k is a normalization coefficient;
Figure BDA0002103488490000074
respectively as CIE1931 standard chromaticity system color matching functions;
therefore, the color correction coefficients K of R, G and B r 、K g 、K b Is composed of
Figure BDA0002103488490000075
After the formulas (1) and (2) are combined, the XYZ type of the RGB spectrogram of the image acquisition device under the CIE standard through calibration can be obtained. Namely, the comparison of the R, G and B spectrograms with XYZ under the CIE standard can be realized through the steps, so that whether the camera is calibrated to meet the requirements or not is distinguished, namely the set correction coefficients are all 1; if the error between the two is too large, the color of the color camera needs to be corrected by the correction coefficient of formula (3).
The method for converting the RGB original image into the RGB image only containing the blue-green flame specifically comprises the following steps:
1. and converting the RGB original image into an HSV image.
2. And extracting H layers in the HSV map, and constructing an H-layer filter screen layer by using the blue-green range value. Because the three layers H, S and V in the HSV diagram are independent, the H layer extraction can be directly carried out, and the H layer filter layer is constructed by taking the blue-green range value as a selection threshold, wherein the blue-green range value can be set to be 0.5-0.7, for example.
3. And respectively multiplying the H-layer filter screen layer with the R layer, the G layer and the B layer in the RGB original image, so that the obtained R layer, the G layer and the B layer are all layers only containing blue-green flame.
4. And synthesizing the dot-multiplied R layer, G layer and B layer to obtain an RGB image only containing blue-green flame.
S3, the combustion control system calculates the B/G value of the converted RGB image;
because image background and noise may interfere with the accuracy of the B/G value calculation in the RGB image, for this reason, filtering and denoising may be performed on the RGB image before the B/G value is calculated.
The B/G value is calculated by extracting a ratio of a B layer and a G layer in the image as a B/G value, where the B/G value may be a B/G value in the B layer and the G layer at a certain point in the image, or may be an average B/G value of the B layer and the G layer in the entire image, and for example, a ratio of a sum of all points in the B layer and a sum of all points in the G layer in the image may be used as the average B/G value.
S4, the combustion control system inputs the B/G value into a flame equivalence ratio judgment model, and the equivalence ratio of flame color is calculated
Figure BDA0002103488490000081
According to known equivalence ratio under flame of fuel combustion state
Figure BDA0002103488490000082
And the corresponding B/G value of the flame color to establish the flame equivalence ratio judgment model, comprising the following steps:
1. collecting different equivalence ratios of flames in a fuel combustion state
Figure BDA0002103488490000083
And its corresponding B/G value for the flame color. Specifically, the ratio of fuel to air is adjusted using gas flow meter control to achieve a particular equivalence ratio
Figure BDA0002103488490000084
Stabilizing flame, shooting RGB original image of flame color by image acquisition device, and calculating the specific equivalence ratio according to the method
Figure BDA0002103488490000085
B/G value under the condition. The steps are repeated, and B/G values of flame images under different equivalence ratios are obtained. For example, by regulating fuel and airThe gas proportion changes the flame equivalence ratio to 0.85-1.2, the interval is 0.05, and the B/G value corresponding to each specific point in the equivalence ratio range is obtained.
2. Taking the B/G value as the input sample characteristic, and taking the corresponding equivalence ratio
Figure BDA0002103488490000086
And establishing the flame equivalence ratio judgment model through data fitting for outputting a sample label.
Specifically, the collected and extracted B/G characteristic value is used as an input sample characteristic, the corresponding equivalence ratio is used as an output sample label, and a y (phi) = f (B/G) model of the flame image B/G characteristic value and the corresponding flame equivalence ratio phi is established through data fitting.
Inputting the B/G value into a flame equivalence ratio judgment model, and calculating the equivalence ratio of the flame color
Figure BDA0002103488490000087
Specifically, the B/G value may be a specific set point in the image, or the B/G value for all points, or the average B/G value for all points in the image, or for points within a set range, where the equivalence ratio is
Figure BDA0002103488490000088
Is the equivalence ratio of the corresponding specific set point, or all points
Figure BDA0002103488490000091
Or all points in the image, or setting the average equivalence ratio of points within the range
Figure BDA0002103488490000093
In this example, the resulting equivalence ratio was calculated
Figure BDA0002103488490000094
For all points in the image or for the average equivalence ratio of points within a set range
Figure BDA0002103488490000092
Wherein the setting range is as requiredA certain area in the image to be known may be pre-defined by the operator, e.g. a square block, a circle, etc. of a certain area.
S5, the combustion control system compares the equivalence ratio
Figure BDA0002103488490000095
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA0002103488490000096
The combustion control system controls the fuel supply amount of the fuel supply line or the air supply amount of the air supply line of the combustion furnace so that the equivalence ratio is different from the equivalence ratio alpha
Figure BDA0002103488490000097
The equivalent ratio alpha is the same.
In the actual combustion control, in order to achieve effective control, the fuel-to-air supply amount ratio is made appropriate. Specifically, the calculated equivalence ratio is calculated
Figure BDA0002103488490000098
Comparing with the set equivalence ratio alpha if the equivalence ratio is lower than the set equivalence ratio alpha
Figure BDA0002103488490000099
The same as the equivalence ratio alpha, in particular, when the equivalence ratio alpha is a specific value, the same means the equivalence ratio
Figure BDA00021034884900000910
The specific value of (b) is the same as the value of the equivalence ratio alpha, and the same means the equivalence ratio if the equivalence ratio alpha is a range of values
Figure BDA00021034884900000911
Is located in the range of values of the equivalence ratio alpha. If the equivalence ratio
Figure BDA00021034884900000912
In contrast to the set equivalence ratio alpha,the combustion control system controls the fuel supply amount of the fuel supply line of the combustion furnace or the air supply amount of the air supply line so that the equivalence ratio is equal to
Figure BDA00021034884900000913
The equivalent ratio alpha is the same as the equivalent ratio alpha, so that the control of the fuel equivalent ratio is realized, the fuel equivalent ratio is more reasonable, and the combustion efficiency and the quality are improved.
For example, the fuel equivalence ratio may be adjusted by adjusting the air supply amount while keeping the fuel supply amount constant, or the fuel equivalence ratio may be adjusted by adjusting the fuel supply amount while keeping the air supply amount constant, although in other embodiments, the adjustment of the fuel equivalence ratio may be accomplished by adjusting both the fuel supply amount and the air supply amount.
Example two
The second embodiment of the present invention provides an apparatus for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system, referring to fig. 2, the apparatus includes: an acquisition module to: the combustion control system controls the image acquisition device to shoot and acquire RGB original images of flame colors in the combustion furnace; a conversion module to: the combustion control system converts the RGB original image into an RGB image only containing blue-green flame; a first computing module to: the combustion control system calculating the B/G value of the converted RGB image; a second calculation module to: the combustion control system inputs the B/G value into a flame equivalence ratio judgment model and calculates the equivalence ratio of flame color
Figure BDA00021034884900000914
A control module to: the combustion control system compares the equivalence ratio
Figure BDA00021034884900000915
If the equivalence ratio is compared with the set equivalence ratio alpha
Figure BDA00021034884900000916
Different from the equivalence ratio alpha, the combustion control system controls theThe fuel supply amount of the fuel supply line of the combustion furnace or the air supply amount of the air supply line is set to the equivalence ratio
Figure BDA0002103488490000101
The equivalent ratio alpha is the same.
Further, the apparatus further comprises:
a correction module to: carrying out chromatic aberration correction on the RGB original image by utilizing the RGB correction coefficient to obtain an RGB correction image; the RGB correction coefficient is obtained by comparing a spectral response curve of an image acquisition device for acquiring the RGB original image with a standard color tristimulus value curve.
Further, the apparatus further comprises:
a filtering module to: before the first calculation module calculates, filtering the RGB image;
a denoising module to: and denoising the RGB image after filtering.
Since the apparatus described in the second embodiment of the present invention is an apparatus used for implementing the method of the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the apparatus, and thus the details are not described herein. All the devices adopted by the method of the first embodiment of the invention belong to the protection scope of the invention.
EXAMPLE III
Referring to fig. 3, it should be noted that, based on the same inventive technique as in the first embodiment and the second embodiment, a third embodiment of the present invention provides a system, including: radio frequency circuit 310, memory 320, input unit 330, display unit 340, audio circuit 350, wiFi module 360, processor 370, and power supply 380. The storage 320 stores a computer program that can be executed on the processor 370, and the processor 370 implements the steps S1, S2, S3, S4, and S5 according to one embodiment when executing the computer program.
In the implementation process, when the processor executes the computer program, the first embodiment or the second embodiment can be implemented.
Those skilled in the art will appreciate that the device configuration shown in fig. 3 is not intended to be limiting of the device itself and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes the components of the computer device in detail with reference to fig. 3:
the rf circuit 310 may be used for receiving and transmitting signals, and in particular, receives downlink information of a base station and then processes the downlink information to the processor. In general, the radio frequency circuitry 310 includes, but is not limited to, at least one amplifier, transceiver, coupler, low noise amplifier, duplexer, and the like.
The memory 320 may be used to store software programs and modules, and the processor 370 may execute various functional applications of the computer device and data processing by operating the software programs and modules stored in the memory 320. The memory 320 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to use of the computer device, and the like. Further, the memory 320 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The input unit 330 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the computer apparatus. Specifically, the input unit 330 may include a keyboard 331 and other input devices 332. The keyboard 331 can collect input operations of a user thereon and drive a corresponding connection device according to a preset program. The output information is collected by the keyboard and then fed to the processor 370. The input unit may include other input devices 332 in addition to the keyboard 331. In particular, other input devices 332 may include, but are not limited to, one or more of a touch panel, function keys (such as volume control keys, switch button lights), a trackball, a mouse, a joystick, and the like.
The display unit 340 may be used to display information input by a user or information provided to the user and various menus of the computer device. The display unit 340 may include a display panel 341, and optionally, the display panel 341 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. Further, the keyboard 331 may cover the display panel 341, and when the keyboard 331 detects a touch operation on or near the keyboard 331, the keyboard 331 transmits the touch event to the processor 370 to determine the type of the touch event, and then the processor 370 provides a corresponding visual output on the display panel 341 according to the type of the input event. Although the keyboard 331 and the display panel 341 are shown in fig. 3 as two separate components to implement input and output functions of the computer device, in some embodiments, the keyboard 331 and the display panel 341 may be integrated to implement input and output functions of the computer device.
Audio circuitry 350, speaker 351, microphone 352 may provide an audio interface between a user and a computer device. The audio circuit 350 may transmit the electrical signal converted from the received audio data to the speaker 351, and the audio signal is converted into a sound signal by the speaker 351 and output.
WiFi belongs to short-distance wireless transmission technology, and computer equipment can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 360, and provides wireless broadband internet access for the user. Although the WiFi module 360 is shown in fig. 3, it is understood that it does not belong to the essential constitution of the computer device, and may be omitted entirely as needed within a scope not changing the essence of the invention.
The processor 370 is a control center of the computer device, connects various parts of the entire computer device using various interfaces and lines, performs various functions of the computer device and processes data by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory 320, thereby monitoring the computer device as a whole. Alternatively, processor 320 may report one or more processing units; preferably, the processor 320 may be integrated with an application processor, wherein the application processor mainly processes an operating system, a user interface, an application program, and the like.
The computer device also includes a power supply 380 (such as a power adapter) for powering the various components, which may preferably be logically connected to the processor 370 through a power management system.
Example four
Based on the same inventive concept, as shown in fig. 4, the fourth embodiment provides a computer-readable storage medium 400, on which a computer program 411 is stored, and when executed by a processor, the computer program 411 implements the steps S1, S2, S3, S4, S5 of one of the embodiments.
In a specific implementation process, when the computer program 411 is executed by a processor, the implementation of any one of the first and second embodiments may be implemented.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, hard disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (6)

1. A method of controlling a furnace feed fuel equivalence ratio based on a combustion control system, the method comprising:
s1, the combustion control system controls an image acquisition device to shoot and acquire RGB original images of flame colors in the combustion furnace;
s2, the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
s3, the combustion control system calculates the B/G value of the converted RGB image;
s4, the combustion control system inputs the B/G value into a flame equivalence ratio judgment model and calculates the equivalence ratio phi of the flame color;
s5, the combustion control system compares the equivalence ratio phi with a set equivalence ratio alpha, and if the equivalence ratio phi is different from the equivalence ratio alpha, the combustion control system controls the fuel supply amount of a fuel supply pipeline of the combustion furnace or the air supply amount of an air supply pipeline to enable the equivalence ratio phi to be the same as the equivalence ratio alpha;
before the step S2, carrying out chromatic aberration correction on the RGB original image by using an RGB correction coefficient; the RGB correction coefficient is obtained by comparing a spectral response curve of an image acquisition device for acquiring the RGB original image with a standard color tristimulus value curve, and the specific method comprises the following steps:
the conversion rule for converting the RGB mode of the image into the XYZ mode under the CIE standard is as follows:
Figure FDA0003884883340000011
wherein E (λ) represents a spectral power distribution function of the light source;
Figure FDA0003884883340000012
the spectral responsivity of each wave band of R, G and B of the color camera;
Figure FDA0003884883340000013
k is a normalization coefficient;
Figure FDA0003884883340000014
respectively as CIE1931 standard chromaticity system color matching functions;
therefore, the color correction coefficient K of each band of R, G, B r 、K g 、K b Is composed of
Figure FDA0003884883340000021
After the formulas (1) and (2) are combined, the RGB spectrogram of the image acquisition device after calibration corresponds to an XYZ type under the CIE standard, namely, the comparison of the R, G and B spectrograms with the XYZ under the CIE standard can be realized through the steps, so that whether the camera is calibrated to meet the requirements or not can be distinguished, namely, the set correction coefficient is 1 at the moment; if the error between the two is too large, the color of the color camera needs to be corrected by the correction coefficient of formula (3).
2. The method for controlling the equivalence ratio of fuel supplied to a combustion furnace based on a combustion control system according to claim 1, wherein the establishing of the flame equivalence ratio determination model according to the known equivalence ratio Φ and the corresponding B/G value of the flame color under the combustion state of the fuel specifically comprises:
collecting different equivalence ratios phi of flames in a fuel combustion state and corresponding B/G values of the flame colors;
and establishing the flame equivalence ratio judgment model by data fitting by taking the B/G value as the input sample characteristic and the corresponding equivalence ratio phi as an output sample label.
3. The method of claim 1, wherein converting the RGB artwork into RGB images containing only blue-green flames comprises:
converting the RGB original image into an HSV image;
extracting a layer H in the HSV image, and constructing a layer H filter screen layer by using a blue-green range value;
respectively multiplying the H-layer filter screen layer with an R layer, a G layer and a B layer in the RGB original image by dot multiplication;
and synthesizing the dot-multiplied R layer, G layer and B layer to obtain an RGB image only containing blue-green flame.
4. The method for controlling a furnace-supplied fuel equivalence ratio based on a combustion control system of claim 1, wherein filtering and de-noising is performed on the RGB image prior to calculating the B/G value.
5. An apparatus for controlling a furnace feed fuel equivalence ratio based on a combustion control system, the apparatus comprising:
an acquisition module to: the combustion control system controls the image acquisition device to shoot and obtain RGB original images of flame colors in the combustion furnace;
a conversion module to: the combustion control system converts the RGB original image into an RGB image only containing blue-green flame;
a correction module to: carrying out chromatic aberration correction on the RGB original image by utilizing the RGB correction coefficient to obtain an RGB correction image;
a first computing module to: the combustion control system calculating the B/G value of the converted RGB image;
a second calculation module to: the combustion control system inputs the B/G value into a flame equivalence ratio judgment model and calculates the equivalence ratio phi of the flame color;
a control module to: the combustion control system compares the equivalence ratio phi with a set equivalence ratio alpha, and if the equivalence ratio phi is different from the equivalence ratio alpha, the combustion control system controls the fuel supply amount of a fuel supply pipe of the combustion furnace or the air supply amount of an air supply pipe so that the equivalence ratio phi is the same as the equivalence ratio alpha;
the RGB correction coefficient is obtained by comparing a spectral response curve of an image acquisition device for acquiring the RGB original image with a standard color tristimulus value curve, and the specific method comprises the following steps:
the conversion rule for converting the RGB mode of the image into the XYZ mode under the CIE standard is as follows:
Figure FDA0003884883340000031
wherein E (λ) represents a spectral power distribution function of the light source;
Figure FDA0003884883340000032
the spectral responsivity of each wave band of R, G and B of the color camera;
Figure FDA0003884883340000033
k is a normalization coefficient;
Figure FDA0003884883340000034
respectively as CIE1931 standard chromaticity system color matching functions;
therefore, the color correction coefficients K of R, G and B r 、K g 、K b Is composed of
Figure FDA0003884883340000041
After the formulas (1) and (2) are combined, the RGB spectrogram of the image acquisition device after calibration corresponds to an XYZ type under the CIE standard, namely, the R, G and B spectrograms can be compared with XYZ under the CIE standard through the steps, so that whether the camera is calibrated to meet the requirements or not is judged, namely, the set correction coefficients are all 1; if the error between the two is too large, the color of the color camera needs to be corrected by the correction coefficient of formula (3).
6. The apparatus for controlling a furnace feed fuel equivalence ratio based on a combustion control system of claim 5, further comprising:
a filtering module to: before the first calculation module calculates, filtering the RGB image;
a denoising module to: and denoising the RGB image after filtering.
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