Single infrared probe hearth section temperature field detection method and system

Abstract

The invention provides a single infrared probe hearth section temperature field detection method and system, and relates to the technical field of temperature detection, and the method comprises the steps: obtaining a preset simulation detection space and environment information around a hearth; a first detection temperature at the first preset point location is collected, and a first distance between the first preset position and the first preset point location is determined; acquiring a second detection temperature at the first preset point location; determining an error relation function according to the first distance, the first detection temperature, the second detection temperature and the environment information; collecting hearth section temperature data at a plurality of second preset point locations in the hearth section, and determining coordinate information of the second preset point locations in the hearth coordinate system; determining a hearth section temperature field detection score according to the hearth section temperature data and the coordinate information; and generating a hearth section temperature field detection report according to the hearth section temperature field detection score. According to the invention, the accuracy of the hearth section temperature field detection result can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of temperature detection, and in particular to a method and system for detecting a furnace cross-section temperature field using a single infrared probe. Background Art

[0002] In the related art, CN116086614B discloses a method for visualizing the temperature field and radiation characteristics of a boiler furnace cross section by combining radiation images and spectra. This method belongs to the field of thermal radiation temperature detection and can adapt to harsh measurement conditions. The image detector can be directly inserted into the boiler fire viewing hole to collect flame image data. When using this detection system, the power plant boiler does not need to make additional holes, and does not need to bear the risk of reducing the strength of the boiler wall due to drilling. The furnace cross-section temperature field measured by the detection system can accurately judge the combustion state in the furnace, and can accurately and effectively guide the boiler combustion regulation, reduce the temperature deviation of each combustion zone of the boiler, and keep the boiler running smoothly, thereby improving the boiler combustion efficiency and reducing pollutant emissions.

[0003] CN103808412B discloses a furnace workpiece temperature measurement device and method, which are mainly used for online measurement of the surface temperature field of industrial furnace workpieces in the field of thermal processing. The scheme device comprises an infrared endoscope lens group with a cooling protection sleeve, a high-temperature flue gas filter, an infrared thermal imaging probe, an automatic rotation advance and retreat mechanism of the lens group, an infrared thermal imaging temperature measurement host and a monitoring display device and a contact-type workpiece surface temperature thermometer and other components, which together constitute a furnace workpiece surface temperature field infrared thermal imaging temperature measurement system device and a temperature measurement method thereof. In the scheme, the infrared thermal imaging lens group is provided with a high-temperature flue gas filter, which can effectively filter out the shielding effect of high-temperature flue gas on the surface temperature of the workpiece in the furnace. Through the thermal pixel temperature system error correction algorithm, the system error is effectively eliminated and the temperature measurement accuracy is improved.

[0004] Based on the above related technologies, the system error can be effectively eliminated and the temperature measurement accuracy can be improved through the thermal pixel temperature system error correction algorithm. However, the related technologies do not consider the influence of other environmental factors (such as humidity, wind force and measurement distance) on the temperature measurement error. That is, the related technologies are difficult to consider the influence of real-time environmental factors on temperature measurement, and thus it is difficult to ensure the accuracy of the furnace section temperature field detection results.

[0005] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The present invention provides a single infrared probe furnace cross-section temperature field detection method and system, which can solve the technical problem that related technologies are difficult to consider the impact of real-time environmental factors on temperature measurement, thereby making it difficult to ensure the accuracy of furnace cross-section temperature field detection results.

[0007] According to a first aspect of the present invention, a method for detecting a furnace cross-section temperature field using a single infrared probe is provided, comprising:

[0008] By means of a sensor combination arranged around the furnace, environmental information of a preset simulated detection space and the surroundings of the furnace is obtained, wherein the environmental information includes: temperature information, humidity information and wind force information;

[0009] At multiple moments in the simulation detection cycle, a single infrared probe disposed at a first preset position is used to collect a first detection temperature at a first preset point, and a first distance between the first preset position and the first preset point is determined;

[0010] A second detected temperature at the first preset point is collected by a temperature sensor arranged at the first preset point;

[0011] determining an error relationship function according to the first distance, the first detected temperature, the second detected temperature, and the environmental information;

[0012] At multiple moments in the detection cycle, a second single infrared probe arranged at multiple second preset positions of the furnace is used to collect furnace cross-section temperature data at multiple second preset points in the furnace cross-section, and coordinate information of the second preset points in the furnace coordinate system is determined, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross-section;

[0013] Determine a furnace section temperature field detection score according to the furnace section temperature data and the coordinate information;

[0014] A furnace section temperature field detection report is generated based on the furnace section temperature field detection score.

[0015] According to a second aspect of the present invention, a single infrared probe furnace cross-section temperature field detection system is provided, comprising:

[0016] An environmental information module is used to obtain environmental information of a preset simulation detection space and the surroundings of the furnace through a combination of sensors arranged around the furnace, wherein the environmental information includes: temperature information, humidity information and wind force information;

[0017] A simulation detection module, used for collecting a first detection temperature at a first preset point through a single infrared probe arranged at a first preset position at multiple moments in a simulation detection cycle, and determining a first distance between the first preset position and the first preset point;

[0018] The simulation information module is used to collect a second detected temperature at the first preset point through a temperature sensor arranged at the first preset point;

[0019] A relationship function module, used to determine an error relationship function according to the first distance, the first detected temperature, the second detected temperature and the environmental information;

[0020] A detection information module, used for collecting furnace cross-section temperature data at multiple second preset points in the furnace cross section at multiple moments in the detection cycle through a second single infrared probe arranged at multiple second preset positions of the furnace, and determining the coordinate information of the second preset points in the furnace coordinate system, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross section;

[0021] A detection and scoring module, used to determine a furnace section temperature field detection score based on the furnace section temperature data and the coordinate information;

[0022] The detection report module is used to generate a furnace section temperature field detection report based on the furnace section temperature field detection score.

[0023] Technical effect: According to the present invention, the relationship between temperature information, humidity information, detection distance and wind information and temperature detection error can be accurately analyzed, and then the accuracy of furnace section temperature field detection can be improved based on the relationship. When detecting the furnace section temperature field, the furnace section temperature field is detected and analyzed based on the furnace section temperature data and coordinate information at each second preset point, thereby improving the accuracy of the furnace section temperature field detection result. When determining the error relationship function, the error relationship function can be determined according to the first emissivity, the first camera emissivity, the first distance, the first detection temperature, the second detection temperature and the environmental information, accurately expressing the relationship between the temperature detection error and the environmental factors, the camera emissivity and the detection distance, thereby improving the accuracy of the error relationship function. When determining the actual furnace section temperature data, the actual furnace section temperature data is determined according to the second camera emissivity, the second emissivity, the second distance, the environmental information, the furnace section temperature data and the error relationship function, thereby improving the accuracy and objectivity of the actual furnace section temperature data, thereby providing a data basis for subsequent furnace section temperature field detection. When determining the furnace section temperature field detection score, the furnace section temperature field detection score can be determined based on the first standard deviation, the second standard deviation, the temperature change rate distribution function and the temperature distribution function. During the calculation process, the furnace section temperature field can be detected and analyzed from multiple aspects, including the overall distribution of the furnace section temperature field determined according to the temperature, the overall distribution of the furnace section temperature field determined according to the temperature change rate, and whether there is a high temperature condition in the furnace section, thereby improving the comprehensiveness and accuracy of the furnace section temperature field detection score.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and do not limit the present invention. Other features and aspects of the present invention will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other embodiments can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of an unattended smart parking management system according to an embodiment of the present invention is exemplarily shown;

[0027] Figure 2 A flow chart of an unattended smart parking management method according to an embodiment of the present invention is exemplarily shown. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0030] Figure 1 The following is a schematic flow chart of a method for detecting a furnace cross-section temperature field using a single infrared probe according to an embodiment of the present invention. The method includes:

[0031] Step S101, obtaining environmental information of a preset simulation detection space and the surroundings of the furnace through a sensor combination arranged around the furnace, wherein the environmental information includes: temperature information, humidity information and wind force information;

[0032] Step S102, at multiple moments in the simulation detection cycle, a single infrared probe disposed at a first preset position is used to collect a first detection temperature at a first preset point, and a first distance between the first preset position and the first preset point is determined;

[0033] Step S103, collecting a second detected temperature at the first preset point by means of a temperature sensor disposed at the first preset point;

[0034] Step S104, determining an error relationship function according to the first distance, the first detected temperature, the second detected temperature and the environmental information;

[0035] Step S105, at multiple moments in the detection cycle, by using a second single infrared probe disposed at multiple second preset positions of the furnace, collecting furnace cross-section temperature data at multiple second preset points in the furnace cross-section, and determining coordinate information of the second preset points in a furnace coordinate system, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross-section;

[0036] Step S106, determining a furnace section temperature field detection score according to the furnace section temperature data and the coordinate information;

[0037] Step S107, generating a furnace section temperature field detection report according to the furnace section temperature field detection score.

[0038] According to the single infrared probe furnace section temperature field detection method of an embodiment of the present invention, the relationship between temperature information, humidity information, detection distance and wind information and temperature detection error can be accurately analyzed, and the accuracy of furnace section temperature field detection can be improved based on this relationship. When detecting the furnace section temperature field, the furnace section temperature field is detected and analyzed based on the furnace section temperature data and coordinate information at each second preset point, thereby improving the accuracy of the furnace section temperature field detection results.

[0039] According to an embodiment of the present invention, in step S101, environmental information of a preset simulation detection space and the surroundings of the furnace is obtained by a sensor combination arranged around the furnace, wherein the environmental information includes temperature information, humidity information and wind force information.

[0040] For example, the temperature, humidity and wind speed in the preset simulated detection space can be adjusted manually to simulate the temperature measurement of a single infrared probe under different environmental conditions, and the temperature, humidity and wind speed information around the furnace can be obtained through temperature sensors, humidity sensors and wind speed sensors installed around the furnace.

[0041] According to one embodiment of the present invention, in step S102, at multiple moments in the simulation detection cycle, a single infrared probe is set at a first preset position to collect a first detection temperature at a first preset point, and a first distance between the first preset position and the first preset point is determined.

[0042] For example, since it is impossible to directly use the temperature sensor to detect the temperature of each point on the furnace cross section during the operation of the furnace, and errors will occur when using a single infrared probe for temperature measurement, before detecting the temperature field of the furnace cross section, a simulation detection experiment is first carried out to determine the influence of various external factors on the temperature measurement results of the single infrared probe. In the simulation detection experiment, the preset point in the preset simulation detection space is determined to be the first preset point position, and the first preset point position can fully reflect the environmental changes of the preset simulation detection space, and a single infrared probe is set at the first preset position to detect the first detection temperature at the first preset point position. The first preset point position is a fixed point position, and the first preset position is a moving point position. The first distance between the first preset position and the first preset point position increases uniformly with the passage of time in the simulation detection cycle.

[0043] According to an embodiment of the present invention, in step S103, a second detected temperature at the first preset point is collected by a temperature sensor disposed at the first preset point.

[0044] For example, a temperature sensor is arranged at a first preset point to collect the actual temperature at the first preset point, that is, the second detected temperature.

[0045] According to an embodiment of the present invention, in step S104, an error relationship function is determined according to the first distance, the first detected temperature, the second detected temperature and the environmental information.

[0046] According to one embodiment of the present invention, step S104 includes:

[0047] Acquire a first emissivity of a material at a first preset point;

[0048] Obtaining a first camera emissivity of a single infrared probe at a first preset position;

[0049] An error relationship function is determined according to the first emissivity, the first camera emissivity, the first distance, the first detected temperature, the second detected temperature, and the environmental information.

[0050] For example, the emissivity of a material refers to the ratio of the energy radiated from the surface of the material to the energy radiated from a black body at the same temperature. It is an important parameter for measuring the thermal radiation performance of a material. Different materials of objects have different emissivities. A first emissivity of the material at a first preset point is obtained through a detection instrument (such as an infrared radiometer); the set first camera emissivity of a single infrared probe at the first preset position is obtained. The single infrared probe has a camera that can detect infrared radiation from an object. The first camera emissivity is a parameter that is manually pre-set based on the material of the target to be measured. There is a corresponding relationship between the first camera emissivity and the material of the target to be measured. If the emissivity is not set correctly, it will lead to errors in the measurement results. The first camera emissivity is stored in the memory of the camera; the error between the first detection temperature and the second detection temperature is related to the emissivity, detection distance and surrounding environment to a certain extent. Based on the correlation of the above data, the error relationship function between the first emissivity, the first camera emissivity, the first distance, environmental information and the first detection temperature and the second detection temperature can be determined.

[0051] According to an embodiment of the present invention, determining an error relationship function according to the first emissivity, the first camera emissivity, the first distance, the first detected temperature, the second detected temperature and the environmental information includes: determining an equation to be fitted of the error relationship function according to formula (1);

[0052]

[0053] Among them, if is a conditional function, DT 1，i is the first detection temperature of the first preset point at the i-th moment of the simulation detection cycle, DT 2，i is the second detection temperature of the first preset point at the i-th moment of the simulation detection cycle, Em1 is the first emissivity of the material at the first preset point, and Em c1 is the first camera emissivity of the single infrared probe at the first preset position, Di 1，i is the first distance between the first preset position and the first preset point at the i-th moment of the simulation detection cycle, ET i is the temperature information of the preset simulation detection space at the i-th moment of the simulation detection cycle, EH i is the humidity information of the preset simulation detection space at the i-th moment of the simulation detection cycle, EF i is the wind force information of the preset simulation detection space at the i-th moment of the simulation detection cycle, α1, α2, α3, α4, α5, α6, α7, α8, α9 and α 10 is the coefficient to be fitted;

[0054] Solving the coefficients to be fitted according to the first emissivity, the first camera emissivity, the first distance, the first detected temperature, the second detected temperature, and the environmental information to obtain solved values ​​of the coefficients to be fitted;

[0055] An error relationship function is determined according to the solved values ​​of the coefficients to be fitted and the equation to be fitted.

[0056] According to an embodiment of the present invention, a single infrared probe may generate measurement errors during temperature detection due to external factors. 1，i -DT 2，i is the difference between the first detected temperature and the second detected temperature at the i-th moment of the simulated detection cycle, indicating the error value of temperature detection.

[0057] According to an embodiment of the present invention, in formula (1), the following two situations can be expressed in the form of conditional functions: when Em1>Em c1 When the first emissivity is greater than the first camera emissivity, if the emissivity of the material at the first preset point is higher than the emissivity of the single infrared probe, the single infrared probe may underestimate the actual temperature at the first preset point, resulting in the first detection temperature DT 1，i The value of is too low, which leads to DT 1，i -DT 2，i The value of is small, and the value of the conditional function is is the relative difference between the first emissivity and the first camera emissivity. The larger the ratio is, the higher the first emissivity is, resulting in a higher first detection temperature DT 1，i The lower the value of , the greater the DT 1，i -DT 2，i The value of is small, It means that the relative difference between the first emissivity and the first camera emissivity has a negative correlation with the temperature detection error. When Em1>Em c1 When the condition is , the value of the condition function is the inner condition function The value of .

[0058] According to one embodiment of the present invention, the inner condition function The value of includes the following two cases: when Em1=Em c1 When the condition of Em1=Em is satisfied, the first emissivity is equal to the first camera emissivity, the error between the temperature detected by the single infrared probe and the actual temperature at the first preset point is small, and the value of the condition function is 1. c1When the first emissivity is less than the first camera emissivity, if the emissivity of the material at the first preset point is lower than the emissivity of the single infrared probe, the single infrared probe may overestimate the true temperature of the object, resulting in the first detection temperature DT 1，i The value of is too large, which leads to DT 1，i -DT 2，i The value of is large, and the value of the conditional function is is the relative difference between the first camera emissivity and the first emissivity. The larger the ratio, the higher the first detection temperature DT 1，i The larger the value of , the greater the DT 1，i -DT 2，i The larger the value of It means that the relative difference between the first camera emissivity and the first emissivity has a positive correlation with the temperature detection error. Conditional function It shows the relationship between the single infrared probe's own factors (emissivity) and the temperature detection error.

[0059] According to one embodiment of the present invention, In (α3ET i +α4) indicates that the temperature information at the i-th moment of the simulation detection cycle has a positive correlation with the error value of the temperature detection. The higher the temperature of the furnace surrounding environment, the higher the first detection temperature DT at the first preset point detected by the single infrared probe. 1，i The larger the value of , the greater the error value of temperature detection DT 1，i -DT 2，i The larger the size, It means that the error value of the first distance and temperature detection has a negative correlation. The larger the first distance, the stronger the attenuation effect of the atmosphere on infrared radiation, resulting in a decrease in the target radiation energy detected by a single infrared probe. The first detection temperature DT 1，i The smaller the value, the greater the error value DT of temperature detection. 1，i -DT 2，i The smaller the size, It indicates that the humidity information at the i-th moment of the simulation detection cycle has a negative correlation with the error value of the temperature detection. The greater the humidity information, the greater the moisture in the air. The moisture will absorb infrared radiation, resulting in a decrease in the target radiation energy detected by a single infrared probe. The first detection temperature DT 1，i The smaller the value, the greater the error value DT of temperature detection. 1，i -DT 2，i The smaller the size, It indicates that the wind force information at the i-th moment of the simulation detection cycle has a negative correlation with the error value of the temperature detection. The greater the wind force information, the faster the heat of the object being detected will be dissipated by the wind, making the first detection temperature DT detected by the single infrared probe1，i The smaller the value, the greater the error value DT of temperature detection. 1，i -DT 2，i The smaller the size. It shows the relationship between external environmental factors and temperature detection error.

[0060] According to one embodiment of the present invention, fitting can be performed based on multiple parameters involved in the above undetermined coefficient equation, that is, the first emissivity, the first camera emissivity, the first distance, the first detected temperature, the second detected temperature and the environmental information to solve the above multiple coefficients to be fitted. There are 10 coefficients to be fitted, namely, α1, α2, α3, α4, α5, α6, α7, α8, α9 and α10. 10 , solve the above 10 coefficients to be fitted, obtain the solution values ​​of the above 10 coefficients to be fitted, and substitute the solution values ​​of the above 10 coefficients to be fitted into the equation to be fitted to determine the error relationship function.

[0061] In this way, the error relationship function can be determined based on the first emissivity, the first camera emissivity, the first distance, the first detection temperature, the second detection temperature and the environmental information, which accurately expresses the relationship between the temperature detection error and the environmental factors, the camera emissivity and the detection distance, thereby improving the accuracy of the error relationship function.

[0062] According to one embodiment of the present invention, in step S105, at multiple moments in the detection cycle, furnace cross-section temperature data at multiple second preset points in the furnace cross-section are collected by a second single infrared probe arranged at multiple second preset positions of the furnace, and the coordinate information of the second preset points in the furnace coordinate system is determined, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross-section.

[0063] For example, multiple single infrared probes are installed at appropriate positions of the furnace, that is, at the second preset positions, so as to capture the temperature information of the furnace section. The second preset positions will not be directly washed by the flame inside the furnace to avoid damaging the probes or affecting the measurement accuracy. The second preset points are evenly distributed in the furnace section, and the single infrared probes set at the second preset positions corresponding to the second preset points are used to collect the furnace section temperature data at the second preset points.

[0064] According to an embodiment of the present invention, in step S106, a furnace cross-section temperature field detection score is determined based on the furnace cross-section temperature data and the coordinate information.

[0065] According to one embodiment of the present invention, step S106 includes:

[0066] Acquire camera coordinate information of a plurality of second preset positions in the furnace coordinate system;

[0067] Determining a second distance according to the camera coordinate information and the coordinate information;

[0068] Acquire a second camera emissivity of a second single infrared probe disposed at a plurality of second preset positions of the furnace;

[0069] Acquire a second emissivity of the material at a plurality of second preset points;

[0070] Determine actual furnace section temperature data according to the second camera emissivity, the second emissivity, the second distance, the environmental information, the furnace section temperature data and the error relationship function;

[0071] A furnace cross-section temperature field detection score is determined based on the actual furnace cross-section temperature data and the coordinate information.

[0072] For example, based on the camera coordinate information at the second preset position and the coordinate information at the corresponding second preset point, determine the second distance between the second preset position and the second preset point; determine the second camera emissivity set by the second single infrared probe at multiple second preset positions; detect the second emissivity of the material in the cross-section of the furnace through a detection instrument; calculate the actual furnace cross-section temperature data at each second preset point in the furnace cross-section based on the second camera emissivity, the second emissivity, the second distance, environmental information, the furnace cross-section temperature data and the error relationship function; detect and analyze the furnace cross-section temperature field based on the actual furnace cross-section temperature data and the coordinate information of each second preset point, and determine the furnace cross-section temperature field detection score.

[0073] According to one embodiment of the present invention, the actual furnace section temperature data is determined according to the second camera emissivity, the second emissivity, the second distance, the environmental information, the furnace section temperature data and the error relationship function, including: determining the actual furnace section temperature data FFT at the kth second preset point at the jth moment of the detection period according to formula (2): k，j ,

[0074]

[0075] Among them, if is the conditional function, FT k，j is the furnace cross-section temperature data of the kth second preset point at the jth moment of the detection cycle, Em 2，k is the second emissivity at the kth second preset point, Em c2,k is the second camera emissivity of the single infrared probe at the kth second preset position, ST j is the temperature information around the furnace at the jth moment of the detection cycle, SH jis the humidity information around the furnace at the jth moment of the detection cycle, SF j is the wind force information around the furnace at the jth moment of the detection cycle, Di k is the second distance between the kth second preset position and the kth second preset point, α 1,F is the solution value of α1, α 2，F is the solution value of α2, α 3，F is the solution value of α3, α 4，F is the solution value of α4, α 5,F is the solution value of α5, α 6,F is the solution value of α6, α 7，F is the solution value of α7, α 8，F is the solution value of α8, α 9,F is the solution value of α9, α 10,F is α 10 The solution value of .

[0076] According to one embodiment of the present invention, the second camera emissivity, the second emissivity, the second distance, the environmental information, and the furnace cross-sectional temperature data can be substituted into the error relationship function to obtain formula (2), thereby obtaining the actual furnace cross-sectional temperature data at the jth moment of the detection cycle, and then determining the actual furnace cross-sectional temperature data at each moment in the detection cycle.

[0077] In this way, the actual furnace cross-section temperature data can be determined based on the second camera emissivity, the second emissivity, the second distance, environmental information, furnace cross-section temperature data and the error relationship function, which can improve the accuracy and objectivity of the actual furnace cross-section temperature data and provide a data basis for subsequent furnace cross-section temperature field detection.

[0078] According to an embodiment of the present invention, determining a furnace section temperature field detection score according to the actual furnace section temperature data and the coordinate information includes:

[0079] Determining a temperature distribution function according to the actual furnace cross-section temperature data and the coordinate information;

[0080] Fitting the actual furnace cross-sectional temperature data at the kth second preset point and the time in the detection cycle to obtain an actual temperature function of the actual furnace cross-sectional temperature at the kth second preset point in the detection cycle;

[0081] According to the actual temperature function, obtaining an actual temperature derivative function;

[0082] Determine the actual temperature change rate of the kth second preset point at multiple moments in the detection period according to the actual temperature derivative function;

[0083] Determining a temperature change rate distribution function according to the actual temperature change rate and the coordinate information;

[0084] Determining a first standard deviation according to the actual furnace cross-section temperature data;

[0085] Determining a second standard deviation according to the actual temperature change rate;

[0086] A furnace cross-section temperature field detection score is determined based on the first standard deviation, the second standard deviation, the temperature change rate distribution function, and the temperature distribution function.

[0087] For example, according to the actual furnace cross-section temperature data and coordinate information at each second preset point, a temperature distribution function is determined to represent the temperature distribution status of each second preset point in the furnace cross-section; the actual furnace cross-section temperature data at the kth second preset point and the time in the detection cycle are fitted to obtain an actual temperature function for describing the law of the actual furnace cross-section temperature data at the kth second preset point in the detection cycle changing over time; the actual temperature function is derived to determine the actual temperature derivative function; the time in the detection cycle is substituted into the actual temperature derivative function to determine the kth second preset point. The actual temperature change rates of k second preset points at multiple moments in the detection period; determining the temperature change rate distribution function based on the actual temperature change rates and coordinate information at the multiple second preset points; calculating the first standard deviation of the actual furnace cross-section temperature data of the multiple second preset points at each moment in the detection period; calculating the second standard deviation of the actual temperature change rates of the multiple second preset points at each moment in the detection period; detecting and analyzing the furnace cross-section temperature field according to the first standard deviation, the second standard deviation, the temperature change rate distribution function and the temperature distribution function, and determining the furnace cross-section temperature field detection score.

[0088] According to one embodiment of the present invention, determining the furnace section temperature field detection score according to the first standard deviation, the second standard deviation, the temperature change rate distribution function and the temperature distribution function includes: determining the furnace section temperature field detection score T according to formula (3) fd ,

[0089]

[0090] Among them, max is the maximum value function, β p is the preset multiple, θ1, θ2 and θ3 are the preset weights, if is the conditional function, (x k ,y k ) is the coordinate information of the kth second preset point, Td j (x k ,y k) is the function value of the temperature distribution function at the kth second preset point at the jth moment of the detection period, Sd 1，j is the first standard deviation of the jth moment of the detection period, Tr j (x k ,y k ) is the function value of the temperature change rate distribution function at the kth second preset point at the jth moment of the detection period, Sd 2，j is the second standard deviation of the jth moment of the detection cycle, Tg T is the preset temperature threshold, K is the number of second preset points, k≤K, m is the number of moments in the detection cycle, j≤m, k, K, j and m are all positive integers.

[0091] According to one embodiment of the present invention, in formula (3), the following two situations can be expressed in the form of conditional functions: When the condition is met, it means that the actual furnace section temperature data of the kth second preset point in the furnace section at the jth moment is in an interval with the average actual furnace section temperature data as the interval center and the first standard deviation of twice the preset multiple as the interval length. The value of the condition function is 1. When it is not met When the condition is met, the value of the condition function is 0. If the actual furnace section temperature data at the kth second preset point at the jth moment meets the above condition, it means that the deviation between the actual furnace section temperature data and the average value of the actual furnace section temperature data at the K second preset points at the jth moment is small; otherwise, it can be considered that the deviation between the actual furnace section temperature data and the average value is large.

[0092] It is the ratio between the number of second preset points where the actual furnace section temperature data has a smaller deviation from the average value and the total number of second preset points. The larger the ratio is, the more uniform the distribution of the furnace section temperature field determined according to the temperature is.

[0093] The average value is calculated based on the number of moments in the detection cycle. The larger the ratio is, the more uniform the overall distribution of the furnace cross-section temperature field determined by the temperature during the detection cycle is.

[0094] According to one embodiment of the present invention, in formula (3), the following two situations can be expressed in the form of conditional functions: When the condition is met, it means that the actual temperature change rate of the kth second preset point in the furnace section at the jth moment is within the interval with the average actual temperature change rate as the center of the interval and the second standard deviation of twice the preset multiple as the interval length. The value of the condition function is 1. When it is not met When the condition is met, the value of the condition function is 0. If the actual temperature change rate of the kth second preset point at the jth moment meets the above condition, it means that the deviation between the actual temperature change rate and the average value of the actual temperature change rates at the K second preset points at the jth moment is small. Otherwise, it can be considered that the deviation between the actual furnace section temperature data and the average value is large.

[0095] It is the ratio between the number of second preset points where the deviation between the actual temperature change rate and the average value is smaller and the total number of second preset points. The larger the ratio is, the more uniform the distribution of the furnace cross-section temperature field determined according to the temperature change rate is.

[0096] The average value is calculated based on the number of moments in the detection cycle. The larger the ratio is, the more uniform the overall distribution of the furnace cross-section temperature field determined by the temperature change rate during the detection cycle is.

[0097] According to one embodiment of the present invention, max k∈[1，K] Td j (x k ,y k ) is the maximum value of the actual furnace section temperature data at the K second preset points at the jth moment of the detection cycle. The above maximum value can be used to determine the highest temperature in the furnace section. Too high a temperature may cause slagging at the furnace water-cooled wall and other places, affecting the safe operation of the boiler. The average value is calculated based on the number of moments in the detection cycle, indicating the highest average temperature in the detection cycle. It is the relative difference between the average value of the maximum value of the actual furnace section temperature data at the K second preset points during the detection cycle and the preset temperature threshold. The larger the ratio is, the greater the possibility that the furnace section has an over-high temperature during the detection cycle, and the greater the possibility of a safety risk.

[0098] In this way, the furnace section temperature field detection score can be determined based on the first standard deviation, the second standard deviation, the temperature change rate distribution function and the temperature distribution function. During the calculation process, the furnace section temperature field can be detected and analyzed from multiple aspects, including the overall distribution of the furnace section temperature field determined according to the temperature, the overall distribution of the furnace section temperature field determined according to the temperature change rate, and whether there is a high temperature condition in the furnace section, thereby improving the comprehensiveness and accuracy of the furnace section temperature field detection score.

[0099] According to an embodiment of the present invention, in step S107, a furnace section temperature field detection report is generated according to the furnace section temperature field detection score.

[0100] For example, if the furnace section temperature field detection score is less than the set furnace section temperature field detection score threshold, it means that there is uneven combustion or excessive local temperature in the furnace.

[0101] According to the single infrared probe furnace section temperature field detection method of the embodiment of the present invention, the relationship between temperature information, humidity information, detection distance and wind force information and temperature detection error can be accurately analyzed, and then the accuracy of furnace section temperature field detection can be improved based on the relationship. When detecting the furnace section temperature field, the furnace section temperature field is detected and analyzed based on the furnace section temperature data and coordinate information at each second preset point, thereby improving the accuracy of the furnace section temperature field detection result. When determining the error relationship function, the error relationship function can be determined according to the first emissivity, the first camera emissivity, the first distance, the first detection temperature, the second detection temperature and the environmental information, accurately expressing the relationship between the temperature detection error and the environmental factors, the camera emissivity and the detection distance, thereby improving the accuracy of the error relationship function. When determining the actual furnace section temperature data, the actual furnace section temperature data is determined according to the second camera emissivity, the second emissivity, the second distance, the environmental information, the furnace section temperature data and the error relationship function, thereby improving the accuracy and objectivity of the actual furnace section temperature data, thereby providing a data basis for subsequent furnace section temperature field detection. When determining the furnace section temperature field detection score, the furnace section temperature field detection score can be determined based on the first standard deviation, the second standard deviation, the temperature change rate distribution function and the temperature distribution function. During the calculation process, the furnace section temperature field can be detected and analyzed from multiple aspects, including the overall distribution of the furnace section temperature field determined according to the temperature, the overall distribution of the furnace section temperature field determined according to the temperature change rate, and whether there is a high temperature condition in the furnace section, thereby improving the comprehensiveness and accuracy of the furnace section temperature field detection score.

[0102] Figure 2 A schematic diagram of a furnace cross-section temperature field detection system with a single infrared probe according to an embodiment of the present invention is exemplarily shown, the system comprising:

[0103] An environmental information module is used to obtain environmental information of a preset simulation detection space and the surroundings of the furnace through a combination of sensors arranged around the furnace, wherein the environmental information includes: temperature information, humidity information and wind force information;

[0104] A simulation detection module, used for collecting a first detection temperature at a first preset point through a single infrared probe arranged at a first preset position at multiple moments in a simulation detection cycle, and determining a first distance between the first preset position and the first preset point;

[0105] The simulation information module is used to collect a second detected temperature at the first preset point through a temperature sensor arranged at the first preset point;

[0106] A relationship function module, used to determine an error relationship function according to the first distance, the first detected temperature, the second detected temperature and the environmental information;

[0107] A detection information module, used for collecting furnace cross-section temperature data at multiple second preset points in the furnace cross section at multiple moments in the detection cycle through a second single infrared probe arranged at multiple second preset positions of the furnace, and determining the coordinate information of the second preset points in the furnace coordinate system, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross section;

[0108] A detection and scoring module, used to determine a furnace section temperature field detection score based on the furnace section temperature data and the coordinate information;

[0109] The detection report module is used to generate a furnace section temperature field detection report based on the furnace section temperature field detection score.

[0110] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A method for detecting the temperature field of a furnace section using a single infrared probe, characterized in that: include: By means of a sensor combination arranged around the furnace, environmental information of a preset simulated detection space and the surroundings of the furnace is obtained, wherein the environmental information includes: temperature information, humidity information and wind force information; At multiple moments in the simulation detection cycle, a single infrared probe disposed at a first preset position is used to collect a first detection temperature at a first preset point, and a first distance between the first preset position and the first preset point is determined; A second detected temperature at the first preset point is collected by a temperature sensor arranged at the first preset point; determining an error relationship function according to the first distance, the first detected temperature, the second detected temperature, and the environmental information; At multiple moments in the detection cycle, a second single infrared probe arranged at multiple second preset positions of the furnace is used to collect furnace cross-section temperature data at multiple second preset points in the furnace cross-section, and coordinate information of the second preset points in the furnace coordinate system is determined, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross-section; Determine a furnace section temperature field detection score according to the furnace section temperature data and the coordinate information; A furnace section temperature field detection report is generated based on the furnace section temperature field detection score.

2. The method for detecting the temperature field of a furnace cross section using a single infrared probe according to claim 1, determining an error relationship function according to the first distance, the first detected temperature, the second detected temperature and the environmental information, comprising: Acquire a first emissivity of a material at a first preset point; Obtaining a first camera emissivity of a single infrared probe at a first preset position; An error relationship function is determined according to the first emissivity, the first camera emissivity, the first distance, the first detected temperature, the second detected temperature, and the environmental information.

3. The single infrared probe furnace cross-section temperature field detection method according to claim 2, determining an error relationship function according to the first emissivity, the first camera emissivity, the first distance, the first detection temperature, the second detection temperature and the environmental information, comprising: According to the formula Determine the equation to be fitted for the error relationship function, where if is the conditional function, DT 1，i is the first detection temperature of the first preset point at the i-th moment of the simulation detection cycle, DT 2，i is the second detection temperature of the first preset point at the i-th moment of the simulation detection cycle, Em1 is the first emissivity of the material at the first preset point, and Em c1 is the first camera emissivity of the single infrared probe at the first preset position, Di 1，i is the first distance between the first preset position and the first preset point at the i-th moment of the simulation detection cycle, ET i is the temperature information of the preset simulation detection space at the i-th moment of the simulation detection cycle, EH i is the humidity information of the preset simulation detection space at the i-th moment of the simulation detection cycle, EF i is the wind force information of the preset simulation detection space at the i-th moment of the simulation detection cycle, α1, α2, α3, α4, α5, α6, α7, α8, α9 and α 10 is the coefficient to be fitted; Solving the coefficients to be fitted according to the first emissivity, the first camera emissivity, the first distance, the first detected temperature, the second detected temperature, and the environmental information to obtain solved values ​​of the coefficients to be fitted; An error relationship function is determined according to the solved values ​​of the coefficients to be fitted and the equation to be fitted.

4. The single infrared probe furnace section temperature field detection method according to claim 3, determining the furnace section temperature field detection score according to the furnace section temperature data and the coordinate information, comprising: Acquire camera coordinate information of a plurality of second preset positions in the furnace coordinate system; Determining a second distance according to the camera coordinate information and the coordinate information; Acquire a second camera emissivity of a second single infrared probe disposed at a plurality of second preset positions of the furnace; Acquire a second emissivity of the material at a plurality of second preset points; Determine actual furnace section temperature data according to the second camera emissivity, the second emissivity, the second distance, the environmental information, the furnace section temperature data and the error relationship function; A furnace cross-section temperature field detection score is determined based on the actual furnace cross-section temperature data and the coordinate information.

5. The single infrared probe furnace section temperature field detection method according to claim 4, determining the actual furnace section temperature data according to the second camera emissivity, the second emissivity, the second distance, the environmental information, the furnace section temperature data and the error relationship function, comprising: According to the formula Determine the actual furnace cross-sectional temperature data FFT of the kth second preset point at the jth moment of the detection cycle k，j , Among them, if is the conditional function, FT k，j is the furnace cross-section temperature data of the kth second preset point at the jth moment of the detection cycle, Em 2，k is the second emissivity at the kth second preset point, Em c2,k is the second camera emissivity of the single infrared probe at the kth second preset position, ST j is the temperature information around the furnace at the jth moment of the detection cycle, SH j is the humidity information around the furnace at the jth moment of the detection cycle, SF j is the wind force information around the furnace at the jth moment of the detection cycle, Di k is the second distance between the kth second preset position and the kth second preset point, α 1,F is the solution value of α1, α 2，F is the solution value of α2, α 3，F is the solution value of α3, α 4,F is the solution value of α4, α 5,F is the solution value of α5, α 6,F is the solution value of α6, α 7，F is the solution value of α7, α 8,F is the solution value of α8, α 9,F is the solution value of α9, α 10,F is α 10 The solution value of .

6. The single infrared probe furnace section temperature field detection method according to claim 4, determining the furnace section temperature field detection score according to the actual furnace section temperature data and the coordinate information, comprising: Determining a temperature distribution function according to the actual furnace cross-section temperature data and the coordinate information; Fitting the actual furnace cross-sectional temperature data at the kth second preset point and the time in the detection cycle to obtain an actual temperature function of the actual furnace cross-sectional temperature at the kth second preset point in the detection cycle; According to the actual temperature function, obtaining an actual temperature derivative function; Determine the actual temperature change rate of the kth second preset point at multiple moments in the detection period according to the actual temperature derivative function; Determining a temperature change rate distribution function according to the actual temperature change rate and the coordinate information; Determining a first standard deviation according to the actual furnace cross-section temperature data; Determining a second standard deviation according to the actual temperature change rate; A furnace cross-section temperature field detection score is determined based on the first standard deviation, the second standard deviation, the temperature change rate distribution function, and the temperature distribution function.

7. The method for detecting the temperature field of a furnace section using a single infrared probe according to claim 6, wherein the furnace section temperature field detection score is determined according to the first standard deviation, the second standard deviation, the temperature change rate distribution function and the temperature distribution function, comprising: According to the formula Determine the furnace section temperature field detection score Tfd, where max is the maximum value function, β p is the preset multiple, α1, θ2 and θ3 are the preset weights, if is the conditional function, (x k ,y k ) is the coordinate information of the kth second preset point, Td j (x k ,y k ) is the function value of the temperature distribution function at the kth second preset point at the jth moment of the detection period, Sd 1，j is the first standard deviation of the jth moment of the detection period, Tr j (x k ,y k ) is the function value of the temperature change rate distribution function at the kth second preset point at the jth moment of the detection period, Sd 2，j is the second standard deviation of the jth moment of the detection cycle, Tg T is the preset temperature threshold, K is the number of second preset points, k≤K, m is the number of moments in the detection cycle, j≤m, k, K, j and m are all positive integers.

8. A single infrared probe furnace cross-section temperature field detection system, characterized in that: include: An environmental information module is used to obtain environmental information of a preset simulation detection space and the surroundings of the furnace through a combination of sensors arranged around the furnace, wherein the environmental information includes: temperature information, humidity information and wind force information; A simulation detection module, used for collecting a first detection temperature at a first preset point through a single infrared probe arranged at a first preset position at multiple moments in a simulation detection cycle, and determining a first distance between the first preset position and the first preset point; The simulation information module is used to collect a second detected temperature at the first preset point through a temperature sensor arranged at the first preset point; A relationship function module, used to determine an error relationship function according to the first distance, the first detected temperature, the second detected temperature and the environmental information; A detection information module, used for collecting furnace cross-section temperature data at multiple second preset points in the furnace cross section at multiple moments in the detection cycle through a second single infrared probe arranged at multiple second preset positions of the furnace, and determining the coordinate information of the second preset points in the furnace coordinate system, wherein the furnace coordinate system is a coordinate system established based on the centroid of the furnace cross section; A detection and scoring module, used to determine a furnace section temperature field detection score based on the furnace section temperature data and the coordinate information; The detection report module is used to generate a furnace section temperature field detection report based on the furnace section temperature field detection score.

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