Flame direction determination method, flame direction determination device and electronic equipment

Abstract

The application discloses a flame direction determination method, a flame direction determination device and electronic equipment, and relates to the field of forest fire prevention. The flame direction determination method comprises the following steps: acquiring a current wind speed when a combustible is burning and attribute information of the combustible, wherein the attribute information comprises a combustible type and a combustible size; calculating a current heat release rate of the combustible according to the combustible type and the combustible size, and acquiring a flame height corresponding to the current heat release rate under a windless condition; determining a critical wind speed of the combustible based on the current heat release rate and the flame height; and calculating an actual flame height and a flame deflection angle of the combustible corresponding to the current wind speed based on the critical wind speed. The application can determine the direction of flame burning according to the current wind speed, and provides data support for forest fire prevention.

Description

Technical Field

[0001] The present application relates to the technical field of wildfire prevention and control, and in particular to a flame direction determination method, a flame direction determination device, and an electronic device. Background Art

[0002] With the increasing number of long-distance, high-capacity, and cross-regional power transmission lines, they inevitably pass through mountainous and hilly areas, crossing densely wooded areas with trees and vegetation. The high-temperature flames generated by vegetation burning in overhead line corridors can cause insulation failure in the line's air gap, resulting in a short-circuit failure, posing a significant safety hazard to the reliable operation of the power grid. Woodpile / vegetation piles, due to their simplicity, symmetry, non-enclosed nature, and repeatability, are often used as a stable fire source to study the development and spread of fire. Under the influence of ambient wind, the flames generated by vegetation piles will deflect, affecting the breakdown voltage and spread rate. Therefore, it is necessary to study the flame height and deflection angle under different wind speed conditions to predict the spread direction of vegetation pile flames under different vegetation types, ambient wind speeds, and vegetation surface areas, providing guidance and assistance for constructing vegetation pile flame gap discharge models. Summary of the Invention

[0003] The present application provides a flame direction determination method, a flame direction determination device and an electronic device, which can more accurately determine the relationship between wind speed, flame height and deflection angle, and improve the prediction accuracy of flame direction.

[0004] In a first aspect, the present application provides a flame direction determination method, comprising:

[0005] Obtaining the current wind speed of the combustible material during combustion and the attribute information of the combustible material, wherein the attribute information includes the type and size of the combustible material;

[0006] Calculating a current heat release rate of the combustible material according to the type and size of the combustible material, and obtaining a flame height corresponding to the current heat release rate under windless conditions;

[0007] determining a critical wind speed of the combustible material based on the current heat release rate and the flame height;

[0008] The actual flame height and the flame deflection angle of the combustible material corresponding to the current wind speed are calculated based on the critical wind speed.

[0009] According to the flame direction determination method of this embodiment, when an object burns, the heat release rate of the combustible material can be determined based on the type and size of the combustible material, and the relationship between the heat release rate, flame height and wind speed is determined based on the windless condition to obtain the critical wind speed. Based on the critical wind speed, the actual flame height and flame deflection angle corresponding to the actual wind speed are corrected, thereby improving the accuracy of determining the flame combustion direction.

[0010] In an example implementation, the acquiring the flame height corresponding to the current heat release rate in the windless condition comprises:

[0011] acquiring a first mapping relationship between the heat release rate and the flame height of the combustible in the windless condition;

[0012] calculating the flame height corresponding to the current heat release rate according to the mapping relationship.

[0013] In an example implementation, the determining the critical wind speed of the combustible based on the current heat release rate and the flame height comprises:

[0014] acquiring a second mapping relationship between the heat release rate, the flame height and the wind speed of the combustible in the windless condition;

[0015] calculating the wind speed corresponding to the current heat release rate and the flame height based on the second mapping relationship, to obtain the critical wind speed.

[0016] In an example implementation, the calculating the flame deflection angle of the combustible corresponding to the current wind speed based on the critical wind speed comprises:

[0017] acquiring a first angle mapping relationship between the wind speed in a first horizontal direction and the flame deflection angle of the combustible, and a second angle mapping relationship between the wind speed in a second horizontal direction and the flame deflection angle;

[0018] determining a first component of the current wind speed in the first horizontal direction, and a second component of the current wind speed in the second horizontal direction;

[0019] calculating a first deflection angle in the first horizontal direction corresponding to the critical wind speed and the first component based on the first angle mapping relationship;

[0020] calculating a second deflection angle in the second horizontal direction corresponding to the critical wind speed and the second component based on the second angle mapping relationship;

[0021] combining the first deflection angle and the second deflection angle to obtain the flame deflection angle of the combustible.

[0022] In an example implementation, the calculating the actual flame height of the combustible corresponding to the current wind speed based on the critical wind speed comprises:

[0023] determining a third component of the current wind speed in a vertical direction;

[0024] obtaining a third mapping relationship between a flame height of the combustible and a wind speed in the vertical direction;

[0025] determining a flame elongation under the third component at the critical wind speed based on the third mapping relationship;

[0026] calculating a flame actual height of the combustible under the current wind speed based on the flame deflection angle and the flame elongation.

[0027] In an example embodiment, the second mapping relationship is:

[0028]

[0029] wherein v L is a critical wind speed, Q is a current heat release rate, H f is a flame height, and k1 and n1 are fitting coefficients.

[0030] In an example embodiment, the first angle mapping relationship is:

[0031]

[0032] The second angle mapping relationship is:

[0033]

[0034] wherein θ x is a first deflection angle in a first horizontal direction, θ y is a second deflection angle in a second horizontal direction, k2, n2, and m are fitting coefficients, v x is a first component in the first horizontal direction, and v y is a second component in the second horizontal direction.

[0035] In an example embodiment, the third mapping relationship is:

[0036]

[0037] wherein H v is a flame elongation, H f is a flame height, v z is a third component of a current wind speed in a vertical direction, and C is a fitting coefficient.

[0038] In a second aspect, the application provides a flame direction determination device, comprising:

[0039] a combustible determination module configured to obtain a current wind speed when a combustible is burning and attribute information of the combustible, wherein the attribute information includes combustible type and combustible size;

[0040] a windless flame height determination module, configured to calculate a current heat release rate of the combustible material according to the type and size of the combustible material, and obtain a flame height corresponding to the current heat release rate under windless conditions;

[0041] a critical wind speed determination module, configured to determine a critical wind speed of the combustible material based on the current heat release rate and the flame height;

[0042] The windy flame angle determination module is used to calculate the actual flame height and flame deflection angle of the combustible material corresponding to the current wind speed based on the critical wind speed.

[0043] In a third aspect, the present application provides an electronic device comprising a memory and one or more processors. The memory stores one or more computer programs, each of which includes instructions that, when executed by the processor, cause the electronic device to perform the flame direction determination method described in the first aspect.

[0044] In a fourth aspect, the present application provides a computer-readable storage medium having instructions stored therein. When the instructions are executed on an electronic device, the electronic device executes the flame direction determination method in the first aspect.

[0045] In a fifth aspect, the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the flame direction determination method as described in the first aspect.

[0046] It can be understood that the beneficial effects that can be achieved by the flame direction determination device, electronic device, computer-readable storage medium, and computer program product provided above can refer to the beneficial effects in the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic flow chart of a flame direction determination method provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of combustible materials provided in an embodiment of the present application;

[0049] Figure 3 A schematic diagram of wind speed direction provided in an embodiment of the present application;

[0050] Figure 4 A schematic structural diagram of a flame direction determination device provided in an embodiment of the present application;

[0051] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] To facilitate a clear description of the technical solutions of the embodiments of this application, terms such as "first" and "second" are used in the embodiments of this application to distinguish between identical or similar items with substantially the same functions and effects. For example, the terms "first chip" and "second chip" are used solely to distinguish between different chips and do not limit their order of precedence. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and do not necessarily imply differences. It should be noted that in the embodiments of this application, terms such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner. In the embodiments of this application, "at least one" refers to one or more, and "more" refers to two or more.

[0053] It should be noted that the “at…” in the embodiments of the present application can be the instant when a certain situation occurs, or it can be a period of time after the occurrence of a certain situation. The embodiments of the present application do not make specific limitations on this.

[0054] The implementation of this embodiment will be described in detail below with reference to the accompanying drawings.

[0055] This embodiment provides a flame direction determination method. By way of example, the flame direction determination method can be applied to various electronic devices such as computers (PCs), tablet computers, virtual reality / augmented reality devices, wearable devices, industrial computers, and vehicle computers; it can also be applied to servers, cloud computing, server clusters, etc., and this embodiment does not impose any special limitations on this.

[0056] Figure 1 A flow chart of a flame direction determination method provided in an embodiment of the present application is shown.

[0057] like Figure 1 As shown, the flame direction determination method may include the following steps:

[0058] Step 101: obtaining the current wind speed when the combustible material is burning and the attribute information of the combustible material, wherein the attribute information includes the type and size of the combustible material.

[0059] When combustibles catch fire in mountainous areas, hilly areas, or areas with dense trees and vegetation, the ambient wind speed at the time of the fire can be detected. This ambient wind speed is the current wind speed, which can include wind speed magnitude and direction. Combustibles can include various combustibles, such as straw, branches, and thatch. Wood piles and vegetation piles have relatively stable combustion characteristics, so wood piles and vegetation piles are preferably combustibles.

[0060] In this embodiment, the combustible material may specifically be wood piles, thatch, straw, fir branches, etc. The combustible material size may be the length, width, and height of the combustible material, which may be measured by infrared measurement, binocular camera detection, or the like.

[0061] Step 102: Calculate the current heat release rate of the combustible according to the type and size of the combustible, and obtain the flame height corresponding to the current heat release rate under windless conditions.

[0062] Specifically, the surface area of ​​the combustible material can be calculated from its size, and the heat release rate of the combustible material can be determined from the relationship between surface area and heat release rate. Taking a vegetation pile as an example, the surface area A of the vegetation pile can be calculated based on the size of the wood strips used in the vegetation pile and the overall size of the vegetation pile. Taking a square vegetation pile as an example, assuming that the wood strips are of uniform size, the surface area calculation formula is as follows:

[0063]

[0064] Among them, A1 is the surface area of ​​the bottom layer of vegetation pile, in m2; A2 is the surface area of ​​the top layer of vegetation pile, in m2; w is the surface area of ​​the middle layer of vegetation pile, in m2; A is the total surface area of ​​the vegetation pile, in m2, and the total surface area A represents the area of ​​vegetation in contact with the air; a, b, and c are the length, width, and height of the wood strips used, respectively. Figure 2 The unit is m; n is the number of wood strips in each layer of vegetation pile; z is the number of layers of vegetation pile.

[0065] The heat release rate Q corresponding to complete combustion is calculated based on the surface area of ​​the vegetation pile. The relationship between the surface area A and the heat release rate Q is as follows:

[0066]

[0067] Where Q is the heat release rate, in kW; α is an empirical coefficient that can be obtained through experiments; B is the calorific value of the combustible material, in kJ / kg; T is the load of vegetation combustible material, that is, the mass of combustible material per unit area, in kg / m2; h is the altitude, in meters.

[0068] Different types of combustibles have different calorific values. Through experiments, we obtain the heat data released when different combustibles and combustibles with different surface areas burn. Based on these data, we determine the value of the empirical coefficient α. Then, based on the value of the empirical coefficient α, the actual calorific value of the combustibles, the load, the surface area, and the altitude of the fire area, we substitute it into formula (2) to calculate the heat release rate and obtain the current heat release rate of the combustibles.

[0069] After calculating the current heat release rate, determining the flame height of the combustible material under windless conditions based on the current heat release rate specifically includes: obtaining a first mapping relationship between the heat release rate of the combustible material under windless conditions and the flame height; and calculating the flame height corresponding to the current heat release rate based on the mapping relationship.

[0070] The flame height and heat release rate satisfy the power function relationship, that is, H f =kQ b , k and b are empirical coefficients that can be obtained through experimental fitting. The values ​​of the empirical coefficients corresponding to different combustibles may be different, that is, the first mapping relationship of different combustibles is different, for example:

[0071]

[0072] Among them, H f1 、H f2 、H f3 、H f4 They represent the flame heights of four different combustible materials, namely wood pile, thatch, straw and fir branches, in cm; Q1, Q2, Q3 and Q4 are the heat release rates corresponding to the above four different combustible materials.

[0073] The flame height at the current heat release rate is calculated according to the first mapping relationship corresponding to the combustible material type to obtain the corresponding flame height.

[0074] Step 103: Determine the critical wind speed of the combustible material based on the current heat release rate and the flame height.

[0075] Specifically, a second mapping relationship between the heat release rate of the combustible material under windless conditions, flame height and wind speed is obtained; based on the second mapping relationship, the current heat release rate and the wind speed corresponding to the flame height are calculated to obtain the critical wind speed.

[0076] The experiment found that the critical wind speed is proportional to the heat release rate of vegetation and inversely proportional to the flame height. According to the fitting formula of the experimental data, the corresponding critical wind speed v of different vegetation heat release rates and flame heights is obtained. L The relationship between , obtains the second mapping relationship. The second mapping relationship is as follows:

[0077]

[0078] Among them, v L is the critical wind speed, in m / s; Q is the current heat release rate, in kW; H f is the flame height; k1 and n1 are fitting coefficients, which can be obtained through experiments.

[0079] Step 104: Calculate the actual flame height and flame deflection angle of the combustible material corresponding to the current wind speed based on the critical wind speed.

[0080] The flame deflection angle refers to the vertical deviation angle of the line connecting the top of the flame and the center of the bottom of the flame. Figure 3 As shown, the angle θ is the flame deflection angle.

[0081] As wind speed increases, the flame deflection angle does not increase indefinitely. When the wind speed is below the critical wind speed, the flame deflection angle increases approximately linearly. When the wind speed exceeds the critical wind speed, the flame deflection angle reaches saturation. Based on the experimental data, a formula was fitted to construct a relationship between wind speed and flame deflection angle. This constructed relationship can be used to determine the actual flame height and deflection angle at the current wind speed, thereby achieving the effect of predicting flame direction based on wind speed, providing data support for fire prevention and control.

[0082] The process of calculating the flame deflection angle corresponding to the current wind speed based on the critical wind speed specifically includes the following: obtaining a first angle mapping relationship between the wind speed of the combustible material in the first horizontal direction and the flame deflection angle, and a second angle mapping relationship between the wind speed in the second horizontal direction and the flame deflection angle; determining the first component of the current wind speed in the first horizontal direction, and the second component of the current wind speed in the second horizontal direction; calculating the first deflection angle in the first horizontal direction corresponding to the critical wind speed and the first component based on the first angle mapping relationship; calculating the second deflection angle in the second horizontal direction corresponding to the critical wind speed and the second component based on the second angle mapping relationship; merging the first deflection angle and the second deflection angle to obtain the flame deflection angle of the combustible material.

[0083] The current wind speed v is obtained by measuring, and then the current wind speed is decomposed to obtain the wind speed components on the three-dimensional coordinate system x, y, and z, such as Figure 3 As shown. Wherein, the x direction is the first horizontal direction, the y direction is the second horizontal direction, and the y direction is the vertical direction. The first angle mapping relationship is:

[0084]

[0085] The second angle mapping relationship is:

[0086]

[0087] Among them, θ x is the first deflection angle in the first horizontal direction, θ y is the second deflection angle in the second horizontal direction, k2, n2, m are fitting coefficients, v x is the first component in the first horizontal direction, v y The values ​​of k2, n2, and m can be determined by fitting experimental data. For example, the values ​​of k2, n2, and m can be 1.0, 0.7, and 0.5, respectively.

[0088] The flame deflection angles θ in the two directions are synthesized to obtain the final flame deflection angle, which is specifically expressed as:

[0089]

[0090] Where θ is the flame deflection angle caused by the current wind speed, in degrees.

[0091] Next, the actual flame height of the combustible material is calculated based on the above-mentioned flame deflection angle, specifically including: determining the third component of the current wind speed in the vertical direction; obtaining a third mapping relationship between the flame height of the combustible material in the vertical direction and the wind speed; based on the third mapping relationship, determining the flame elongation at the critical wind speed and the third component; based on the flame deflection angle and the flame elongation, calculating the actual flame height of the combustible material at the current wind speed.

[0092] The flame height under different wind speeds is obtained through experiments, and the flame height and wind speed component v can be determined by fitting the experimental data. z It is an exponential function relationship, that is, the third mapping relationship, through which the component v of the current wind speed can be calculated z The flame extension under the action of the third mapping relationship is:

[0093]

[0094] Among them, G v is the flame extension, H f is the flame height, v z The third component of the current wind speed in the vertical direction, C, is the fitting coefficient, which can be obtained by fitting experimental data. The fitting coefficient C may vary depending on the combustible material. For example, the fitting coefficient C obtained for fir is 0.01.

[0095] According to the flame extension H after the flame is stretched v The actual flame height H under the current wind speed is calculated by the flame deflection angle θ, which is specifically:

[0096] H=H v ·cosθ (9)

[0097] In this embodiment, by analyzing the size of vegetation piles and parameters such as wind speed related to flames, a relationship between vegetation type, ambient wind speed, vegetation surface area, etc. and flame height and deflection angle is constructed, and the limiting relationship between the heat release rate of vegetation combustion and wind speed, as well as the saturation effect of vertical wind speed on flame elongation are taken into account, so that the inclination angle and length of the flame will not increase indefinitely, which is more in line with the morphology and characteristics of the actual vegetation pile flame. It can be used to predict flame height and deflection angle under different wind speeds, vegetation types and vegetation pile sizes, and provide data support for constructing flame spread direction prediction models, flame breakdown voltage models, etc. to prevent and control forest fire disasters in transmission corridors.

[0098] Furthermore, this embodiment also provides a flame direction determination device, which can be used to execute the above flame direction determination method. Figure 4 As shown, the flame direction determination device 400 specifically includes: a combustible material determination module 401, which is used to obtain the current wind speed when the combustible material is burning and the attribute information of the combustible material, wherein the attribute information includes the type of combustible material and the size of the combustible material; a windless flame height determination module 402, which is used to calculate the current heat release rate of the combustible material according to the type of combustible material and the combustible material size, and obtain the flame height corresponding to the current heat release rate under windless conditions; a critical wind speed determination module 403, which is used to determine the critical wind speed of the combustible material based on the current heat release rate and the flame height; and a windy flame angle determination module 404, which is used to calculate the actual flame height and flame deflection angle of the combustible material corresponding to the current wind speed based on the critical wind speed.

[0099] In an exemplary embodiment, the windless flame height determination module 402 may include a first mapping relationship module, which is specifically used to: obtain a first mapping relationship between the heat release rate of the combustible material under windless conditions and the flame height; and calculate the flame height corresponding to the current heat release rate based on the mapping relationship.

[0100] In an exemplary embodiment, the critical wind speed determination module 403 may include a second mapping relationship module, which is specifically used to obtain a second mapping relationship between the heat release rate, flame height and wind speed of the combustible material under windless conditions; based on the second mapping relationship, the current heat release rate and the wind speed corresponding to the flame height are calculated to obtain the critical wind speed.

[0101] In an exemplary embodiment, the windy flame angle determination module 404 may include an angle determination module, which is specifically used to: obtain a first angle mapping relationship between the wind speed of the combustible material in the first horizontal direction and the flame deflection angle, and a second angle mapping relationship between the wind speed in the second horizontal direction and the flame deflection angle; determine the first component of the current wind speed in the first horizontal direction, and the second component of the current wind speed in the second horizontal direction; calculate the first deflection angle in the first horizontal direction corresponding to the critical wind speed and the first component based on the first angle mapping relationship; calculate the second deflection angle in the second horizontal direction corresponding to the critical wind speed and the second component based on the second angle mapping relationship; merge the first deflection angle and the second deflection angle to obtain the flame deflection angle of the combustible material.

[0102] In an exemplary embodiment, the windy flame angle determination module 404 may also include a height determination module for determining the third component of the current wind speed in the vertical direction; obtaining a third mapping relationship between the flame height of the combustible material in the vertical direction and the wind speed; based on the third mapping relationship, determining the flame extension at the critical wind speed and the third component; and calculating the actual flame height of the combustible material at the current wind speed based on the flame deflection angle and the flame extension.

[0103] In an exemplary embodiment, the second mapping relationship is:

[0104]

[0105] Among them, v L is the critical wind speed, Q is the current heat release rate, H f is the flame height, k1 and n1 are fitting coefficients.

[0106] In an exemplary embodiment, the first angle mapping relationship is:

[0107]

[0108] The second angle mapping relationship is:

[0109]

[0110] Among them, θ x is the first deflection angle in the first horizontal direction, θ y is the second deflection angle in the second horizontal direction, k2, n2, m are fitting coefficients, v x is the first component in the first horizontal direction, v y is the second component in the second horizontal direction.

[0111] In an exemplary embodiment, the third mapping relationship is:

[0112]

[0113] Among them, H v is the flame extension, H f is the flame height, v z The third component of the current wind speed in the vertical direction, C is the fitting coefficient.

[0114] The specific details of each module or unit in the above-mentioned flame direction determination device have been described in detail in the corresponding flame direction determination method, and therefore will not be repeated here.

[0115] The embodiment of the present application also provides an electronic device, Figure 5 A schematic structural diagram of an electronic device suitable for implementing the embodiments of the present disclosure is shown. Figure 5 The electronic device 600 shown is only an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0116] like Figure 5 As shown, electronic device 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to the program stored in read-only memory (ROM) 602 or the program loaded from storage portion 608 into random access memory (RAM) 603. Various programs and data required for system operation are also stored in RAM 603. CPU 601, ROM 602 and RAM 603 are connected to each other via bus 604. Input / output (I / O) interface 605 is also connected to bus 604.

[0117] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, and the like; an output section 607 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 608 including a hard disk; and a communication section 609 including a network interface card such as a LAN card or a modem. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 610 as needed, so that computer programs read therefrom can be installed into the storage section 608 as needed.

[0118] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 609, and / or installed from the removable medium 611. When the computer program is executed by the central processing unit (CPU) 601, the above-mentioned functions defined in the embodiments of the present application are performed.

[0119] For example, when the computer program is executed by the central processing unit (CPU) 601, it can perform the following: obtain the current wind speed when the combustible material is burning and the attribute information of the combustible material, the attribute information including the type of combustible material and the size of the combustible material; calculate the current heat release rate of the combustible material based on the type of combustible material and the size of the combustible material, and obtain the flame height corresponding to the current heat release rate under windless conditions; determine the critical wind speed of the combustible material based on the current heat release rate and the flame height; calculate the actual flame height and flame deflection angle of the combustible material corresponding to the current wind speed based on the critical wind speed.

[0120] It should be noted that the computer-readable medium described in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device, or component. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical fiber cable, RF, or any suitable combination thereof.

[0121] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0122] The units described in the embodiments of the present disclosure can be implemented by software, or by hardware, or by a combination of software and hardware. The units described can also be located in a single processor. In some cases, the names of the units do not constitute a limitation on the units themselves.

[0123] As another aspect, the present application also provides a computer readable medium, which can be included in the electronic device described in the above embodiments, or can exist independently without being assembled into the electronic device. The computer readable medium carries one or more programs, which include instructions that, when executed by the electronic device, cause the electronic device to implement the method described in the above embodiments.

[0124] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, such division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units.

[0125] The above is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for determining flame direction, characterized in that: include: Obtaining the current wind speed of the combustible material during combustion and the attribute information of the combustible material, wherein the attribute information includes the type and size of the combustible material; Calculating a current heat release rate of the combustible material according to the type and size of the combustible material, and obtaining a flame height corresponding to the current heat release rate under windless conditions; determining a critical wind speed of the combustible material based on the current heat release rate and the flame height; The actual flame height and the flame deflection angle of the combustible material corresponding to the current wind speed are calculated based on the critical wind speed.

2. The flame direction determination method according to claim 1, characterized in that: The obtaining of the flame height corresponding to the current heat release rate under no wind conditions includes: Obtaining a first mapping relationship between a heat release rate of the combustible material and a flame height under windless conditions; The flame height corresponding to the current heat release rate is calculated according to the mapping relationship.

3. The flame direction determination method according to claim 1, characterized in that: The determining the critical wind speed of the combustible material based on the current heat release rate and the flame height includes: Obtaining a second mapping relationship between the heat release rate, flame height, and wind speed of the combustible under windless conditions; The current heat release rate and the wind speed corresponding to the flame height are calculated based on the second mapping relationship to obtain a critical wind speed.

4. The flame direction determination method according to claim 1, characterized in that: Calculating the flame deflection angle of the combustible material corresponding to the current wind speed based on the critical wind speed includes: Acquire a first angle mapping relationship between a wind speed of the combustible material in a first horizontal direction and a flame deflection angle, and a second angle mapping relationship between a wind speed in a second horizontal direction and a flame deflection angle; determining a first component of the current wind speed in the first horizontal direction and a second component of the current wind speed in the second horizontal direction; Calculate the critical wind speed and the first deflection angle in the first horizontal direction corresponding to the first component based on the first angle mapping relationship; Calculate the critical wind speed and the second deflection angle in the second horizontal direction corresponding to the second component based on the second angle mapping relationship; The first deflection angle and the second deflection angle are combined to obtain a flame deflection angle of the combustible material.

5. The flame direction determination method according to claim 4, characterized in that: Calculating the actual flame height of the combustible material corresponding to the current wind speed based on the critical wind speed includes: determining a third component of the current wind speed in the vertical direction; Obtaining a third mapping relationship between the flame height of the combustible material in the vertical direction and the wind speed; determining, based on the third mapping relationship, an amount of flame extension at the critical wind speed and the third component; Based on the flame deflection angle and the flame extension, an actual flame height of the combustible material at the current wind speed is calculated.

6. The flame direction determination method according to claim 3, characterized in that: The second mapping relationship is: Among them, v L is the critical wind speed, Q is the current heat release rate, H f is the flame height, k1 and n1 are fitting coefficients.

7. The flame direction determination method according to claim 4, characterized in that: The first angle mapping relationship is: The second angle mapping relationship is: Among them, θ x is the first deflection angle in the first horizontal direction, θ y is the second deflection angle in the second horizontal direction, k2, n2, m are fitting coefficients, v x is the first component in the first horizontal direction, v y is the second component in the second horizontal direction.

8. The flame direction determination method according to claim 5, characterized in that: The third mapping relationship is: Among them, H v is the flame extension, H f is the flame height, v z The third component of the current wind speed in the vertical direction, C is the fitting coefficient.

9. A flame direction determination device, characterized in that: include: A combustible material determination module is used to obtain the current wind speed when the combustible material is burning and the attribute information of the combustible material, wherein the attribute information includes the type and size of the combustible material; a windless flame height determination module, configured to calculate a current heat release rate of the combustible material according to the type and size of the combustible material, and obtain a flame height corresponding to the current heat release rate under windless conditions; a critical wind speed determination module, configured to determine a critical wind speed of the combustible material based on the current heat release rate and the flame height; The windy flame angle determination module is used to calculate the actual flame height and flame deflection angle of the combustible material corresponding to the current wind speed based on the critical wind speed.

10. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein one or more computer programs are stored in the memory, and the one or more computer programs include instructions. When the instructions are executed by the electronic device, the electronic device executes the flame direction determination method according to any one of claims 1 to 8.

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