Method and system for evaluating crushing and atomizing effects of fire extinguishing agent in energy storage cabin

Abstract

The invention relates to the field of fire extinguishing agent atomization evaluation, in particular to a method and system for evaluating the crushing atomization effect of a fire extinguishing agent in an energy storage cabin, and the method comprises the steps: carrying out the particle size statistics of foam foaming images, obtaining the particle reference density, carrying out the equal size division of each foam foaming image, and obtaining the density uniform divergence; the method comprises the following steps: acquiring density uniform divergence, calculating particle uniform divergence, acquiring a plurality of atomization images to obtain an atomization coverage area, calculating foam fusion uniformity based on the density uniform divergence and the particle uniform divergence, and constructing an atomization evaluation index based on the fusion uniformity and the atomization coverage area to evaluate the crushing atomization effect of foam. According to the technical scheme, quantitative evaluation can be carried out on the fire extinguishing agent crushing and atomizing effect more accurately.

Description

Technical Field

[0001] The present invention generally relates to the technical field of fire extinguishing agent atomization evaluation, and in particular to a method and system for evaluating the fragmentation atomization effect of a fire extinguishing agent in an energy storage cabin. Background Art

[0002] According to the different fire extinguishing agents, fire protection systems can generally be divided into foam systems, dry powder systems, gas systems, aerosol systems, etc. Among them, for foam fire extinguishing systems, it is often necessary to mix and foam multiple components such as foaming agents, cross-linking agents, gelling agents, etc., and the uniformity of the foaming of multiple components plays a vital role in the atomization effect after the foam is formed.

[0003] At present, a patent document with publication number CN105758759A discloses a laboratory three-phase foam fire extinguishing agent foaming effect detection device and a detection method thereof, wherein a liquid supply system is arranged at the front part of the foaming system, the liquid supply system extends into the foaming system to provide foaming liquid, and a detection system is arranged at the lower part of the tail end of the foaming system for containing the foamed foam and performing detection; the liquid supply system includes a foaming slurry tank, a filter, a screw pump and an atomizing nozzle; a filter screen is arranged inside the filter, a drain valve is arranged below the front end of the filter screen, a water suction pipe is connected to the front end of the filter, the head of the water suction pipe extends into the foaming slurry tank to absorb the foaming slurry, the tail end of the filter is connected to the atomizing nozzle through a water spray pipe, and a screw pump is arranged between the atomizing nozzle and the filter for pumping the foaming slurry.

[0004] However, although the above method can detect the foaming parameters of the foam fire extinguishing agent, it needs to rely on a complex equipment structure, and the method can only evaluate the foaming effect of the fire extinguishing agent. It is impossible to evaluate the more intuitive fire extinguishing agent fragmentation and atomization effect during the fire extinguishing agent injection test, especially it is impossible to combine the fire extinguishing agent foaming effect and atomization effect for comprehensive linkage evaluation. Summary of the invention

[0005] In order to solve the above technical problems of the present invention, the present invention provides a method and system for evaluating the fragmentation and atomization effect of a fire extinguishing agent in an energy storage cabin, so as to accurately evaluate the fragmentation and atomization effect of the fire extinguishing agent during a fire extinguishing agent injection test.

[0006] In a first aspect, the present invention provides a method for evaluating the effect of fire extinguishing agent fragmentation atomization in an energy storage cabin, comprising: Perform particle size statistics on multiple foaming images collected to obtain particle reference density; Dividing each foaming image into equal sizes to obtain an average image set, and calculating a density uniformity divergence based on the average image set and the particle reference density; According to the particle size distribution diagram of the foam foaming image, the weight of the quantity proportion of each particle size is counted to calculate the particle uniform dispersion; The foamed foam is crushed and atomized, and multiple atomization images are collected to obtain the atomization coverage area; The foam fusion uniformity is calculated based on the density uniformity divergence and the particle uniformity divergence, and an atomization evaluation index is constructed based on the foam fusion uniformity and the atomization coverage area to evaluate the foam breaking atomization effect.

[0007] The present invention obtains a more accurate and effective reference density of particles after foaming by means of mean calculation, and calculates the density uniformity divergence in combination with the foam foaming image after equalization to detect whether the density of foam foaming at each position is uniform. At the same time, the particle uniformity divergence is obtained according to the weight of the quantity proportion of each particle size to detect whether the particle size of foam foaming is uniform, and on this basis, the foam fusion uniformity is calculated to be linked with the coverage area after the fire extinguishing agent is broken and atomized, so as to more accurately comprehensively evaluate the fire extinguishing agent's breakage and atomization effect.

[0008] In one embodiment, performing particle size statistics on the collected multiple foam foaming images to obtain a particle reference density includes: Perform particle size statistics on the collected multiple foam foaming images according to a preset image particle analysis system; The particle density corresponding to each foam foaming image was calculated, and the average value of all particle densities was taken as the particle reference density.

[0009] In one embodiment, the step of equally dividing each foam foaming image into two equal parts randomly, and the step of calculating the uniform density divergence based on the equally divided image set and the particle reference density comprises: Calculate the particle density corresponding to each equally divided image after random bisection; The particle reference density is taken as an average, and the variance between the particle density corresponding to each averaged image and the particle reference density is calculated as the density uniformity divergence.

[0010] In one embodiment, the step of calculating the uniform dispersion of particles by counting the weight of each particle size according to the particle size distribution diagram of the foam foaming image comprises: Counting the number of each particle size in each foam foaming image according to the particle size distribution diagram of the foam foaming image; Calculate the number average of each particle size on a single foam foaming image, as well as the sum of all number averages; The ratio of each quantity average to the sum of all quantity averages is taken as the quantity proportion weight of the corresponding particle size; The particle uniformity of the foam foaming image is calculated based on the proportion weight.

[0011] In this way, the number of particle size distributions in each category under different conditions can be counted, and the number proportion weight of each category of particle size distribution can be obtained accordingly. By combining the number proportion weight, the uniform dispersion of particles can be reflected more truly and accurately.

[0012] In one embodiment, the calculating the particle uniformity of the foam foaming image based on the proportion weight comprises: The foam particle size is obtained by multiplying each particle size by the corresponding quantity proportion weight; The variance of all foam particle sizes is calculated to obtain the particle uniform dispersion.

[0013] In one embodiment, collecting a plurality of fog images to obtain the fog coverage area includes: Collect multiple fog images and convert each fog image into a grayscale image; Calculate the frame difference images of two adjacent fogged grayscale images in sequence, and accumulate all the obtained frame difference images to obtain the fog coverage map; The sizes of connected domains of the atomization coverage graph are counted to obtain the atomization coverage area.

[0014] In this way, the coverage of the fire extinguishing agent after fragmentation and atomization can be obtained through simple image processing methods, so as to achieve real-time and accurate detection and improve the efficiency and accuracy of obtaining the atomization coverage area.

[0015] In one embodiment, when constructing the atomization evaluation index, it is also necessary to count the atomization particle size of the fire extinguishing agent when it is broken and atomized. The atomization evaluation index satisfies the relationship:

[0016] in, Indicates The atomization evaluation index value when evaluating the atomization effect of the fire extinguishing agent. For the The atomization coverage area when evaluating the atomization effect of the fire extinguishing agent is is an activation function, which is used to output a value in the interval [0,1]. For the The atomization particle size when evaluating the atomization effect of the fire extinguishing agent is For the The foam fusion uniformity is evaluated when the fire extinguishing agent is broken and atomized.

[0017] In one embodiment, the foam fusion uniformity satisfies the relationship:

[0018] in, Indicates The density uniformity when evaluating the extinguishing agent fragmentation atomization effect, Indicates The uniform dispersion of particles when evaluating the fragmentation and atomization effect of the fire extinguishing agent.

[0019] The present invention also provides a system for evaluating the fragmentation and atomization effect of a fire extinguishing agent in an energy storage cabin, comprising a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the method for evaluating the fragmentation and atomization effect of a fire extinguishing agent in an energy storage cabin according to the first aspect of the present invention is implemented.

[0020] The technical solution of the present invention has the following beneficial technical effects: Through the technical solution provided by the present invention, a more accurate and effective reference density of particles after foaming can be obtained, and the density uniformity divergence can be calculated in combination with the foam foaming image after averaging to detect whether the density of foam foaming at each position is uniform. At the same time, the particle uniformity divergence is obtained according to the weight of the quantity proportion of each particle size to detect whether the particle size of foam foaming is uniform, and on this basis, the foam fusion uniformity is calculated to be linked with the coverage area after the fire extinguishing agent is broken and atomized, so as to more accurately comprehensively evaluate the fire extinguishing agent's breakage and atomization effect.

[0021] Furthermore, the uniformity of foam fusion can be intuitively and quantitatively evaluated through density uniformity divergence and particle uniformity divergence. On this basis, combined with the particle size statistics after the fire extinguishing agent is atomized and image processing technology, the efficiency of fire extinguishing agent atomization effect detection can be improved while achieving a more accurate evaluation of the fire extinguishing agent fragmentation atomization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 is a flow chart of a method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to an embodiment of the present invention; Figure 2 It is a block diagram of a system for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] It should be understood that when the terms "first", "second", etc. are used in the claims, descriptions, and drawings of the present invention, they are only used to distinguish different objects, rather than to describe a specific order. The terms "include" and "comprise" used in the description and claims of the present invention indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their collections.

[0025] According to a first aspect of the present invention, the present invention provides a method for evaluating the fragmentation atomization effect of a fire extinguishing agent in an energy storage cabin. Figure 1 1 is a flow chart of a method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage compartment according to an embodiment of the present invention. Figure 1 As shown, the testing method 100 includes steps S101 to S106, which are described in detail below.

[0026] S101, performing particle size statistics on the collected multiple foam foaming images to obtain a particle reference density.

[0027] In one embodiment, the particle size statistics of the multiple foam foaming images collected can be performed by using a preset static image particle analysis system, wherein the static image particle analysis system can be a BT-1600 static image particle analysis system, which includes an optical microscope, a digital CCD camera, image processing and analysis software, a computer, a printer, and other parts.

[0028] Furthermore, the basic working process of the static image particle analysis system is to capture the image from the microscope with a dedicated digital camera and transmit it to a computer, and then process and analyze the particle image with a dedicated particle image analysis software to obtain the particle size and shape information of each particle, and then perform statistics on the particle size and shape information of each particle to obtain information such as particle size distribution, average aspect ratio and aspect ratio distribution, average circularity and circularity distribution.

[0029] In this optional embodiment, the number of particles in each foam foaming image can be counted based on the static image particle analysis system, and the particle density can be calculated based on the corresponding foam foaming image size, and finally the average value of all particle densities can be used as the particle reference density.

[0030] In this way, the calculated particle reference density is more consistent with the actual situation and reduces the statistical error caused by the uneven particle size distribution in a single image.

[0031] S102, dividing each foaming image into equal sizes to obtain an average image set, and calculating the density uniformity divergence based on the average image set and the particle reference density.

[0032] In one embodiment, each foaming image can be randomly divided into two equal parts, because the image area after being divided into two equal parts can be retained to the maximum extent on the basis of randomly expanding the sample data, and the number of samples of each divided image can be retained to the maximum extent, thereby enhancing the robustness of the data. In the present invention, all images obtained after being divided into equal sizes are used as the equal-divided image set.

[0033] In this optional embodiment, the static image particle analysis system continues to perform statistics on all images in the average image set, thereby obtaining the particle density corresponding to each average image.

[0034] Furthermore, the obtained particle reference density is used as the average value in the variance calculation process, the variance of the particle density corresponding to each averaged image and the particle reference density is calculated, and the obtained variance is used as the density uniformity divergence to characterize the uniformity of the overall particle density of all foam foaming images.

[0035] S103, counting the quantity proportion weight of each particle size according to the particle size distribution diagram of the foam foaming image to calculate the particle uniform dispersion.

[0036] In one embodiment, a particle size distribution diagram of each foam foaming image may be obtained according to a static image particle analysis system. The particle size distribution diagram may display the statistical number of different types of particle sizes in the corresponding foam foaming image in the form of a histogram.

[0037] In one embodiment, the statistical quantity corresponding to each particle size in each foam foaming image can be counted according to the particle size distribution diagram, and on this basis, the quantitative average of each category of particle sizes appearing in all foam foaming images and the sum of the average values ​​composed of all quantitative average values ​​can be calculated.

[0038] Furthermore, the ratio of each number average to the sum of all number averages is taken as the number proportion weight of the corresponding category particle size, and the foam particle size is obtained by calculating the product of each particle size and the corresponding number proportion weight. Finally, the variance of all foam particle sizes is calculated as the particle uniformity divergence, which is used to characterize the overall particle size uniformity of all foam foaming images.

[0039] In this way, the number of particle size distributions in each category under different conditions can be counted, and the number proportion weight of each category of particle size distribution can be obtained accordingly. By combining the number proportion weight, the uniform dispersion of particles can be reflected more truly and accurately.

[0040] S104, breaking and atomizing the foam after foaming, and collecting a plurality of atomization images to obtain the atomization coverage area.

[0041] In an optional embodiment, a resonant atomization foam generating device can be developed through the mechanical structure design of the self-excited resonant chamber inside the foam generating device and OpenFoam simulation, so as to achieve resonance between the high-speed jet and the resonant cavity, further tear the atomization to form an ultra-fine fog field, thereby improving the atomization effect of the fire extinguishing agent.

[0042] In an optional embodiment, images after foam crushing and atomization can be collected by image acquisition equipment such as a high-speed camera, and the collected atomized images can be converted into grayscale images by image preprocessing.

[0043] In this optional embodiment, the frame difference of each adjacent fogged grayscale image can be calculated in turn, and the fog coverage map can be obtained by accumulating all the obtained frame difference images. Then, the number of pixels in the fog coverage image can be obtained through connected domain analysis to obtain the fog coverage area.

[0044] In this way, the coverage of the fire extinguishing agent after fragmentation and atomization can be obtained through simple image processing methods, so as to achieve real-time and accurate detection and improve the efficiency and accuracy of obtaining the atomization coverage area.

[0045] S105, calculating the foam fusion uniformity based on the density uniformity divergence and the particle uniformity divergence.

[0046] In one embodiment, the foam fusion uniformity satisfies the relationship:

[0047] in, Indicates The density uniformity when evaluating the extinguishing agent fragmentation atomization effect, Indicates The uniform dispersion of particles when evaluating the atomization effect of fire extinguishing agent. For the The foam fusion uniformity is evaluated when the fire extinguishing agent is broken and atomized.

[0048] S106, constructing an atomization evaluation index based on the foam fusion uniformity and the atomization coverage area to evaluate the foam breakage atomization effect.

[0049] In one embodiment, when constructing the atomization evaluation index, it is also necessary to use a static image particle analysis system to count the atomization particle size of the fire extinguishing agent during fragmentation and atomization. The reason is that during the fragmentation and atomization process of the fire extinguishing agent, the fineness of the foam particles after atomization is an important factor in evaluating the atomization effect.

[0050] In an optional embodiment, the atomization evaluation index satisfies the relationship:

[0051] in, Indicates The atomization evaluation index value when evaluating the atomization effect of the fire extinguishing agent. For the The atomization coverage area when evaluating the atomization effect of the fire extinguishing agent is is an activation function, which is used to output a value in the interval [0,1]. For the The atomization particle size is used to evaluate the atomization effect of the fire extinguishing agent.

[0052] In this way, by constructing atomization evaluation indicators, various important factors involved in the atomization process of the fire extinguishing agent can be comprehensively considered to intuitively reflect the atomization effect, thereby improving the efficiency of the fire extinguishing agent atomization effect detection and achieving a more accurate evaluation of the fire extinguishing agent fragmentation atomization effect.

[0053] In one embodiment, after evaluating the fire extinguishing agent fragmentation atomization effect using the atomization evaluation index, the experimenter can further optimize the foam atomization effect by adjusting the resonant frequency in the fire extinguishing injection test, thereby achieving a better fire extinguishing effect.

[0054] The above describes the technical principle and implementation details of the method for evaluating the effect of fire extinguishing agent fragmentation and atomization in the energy storage compartment of the present invention through specific embodiments. Through the technical solution provided by the present invention, a more accurate and effective reference density of particles after foaming can be obtained, and the density uniformity divergence is calculated in combination with the foaming image after equalization to detect whether the density of foaming at each position is uniform. At the same time, the particle uniformity divergence is obtained according to the weight of the number of each particle size to detect whether the particle size of foaming is uniform, and on this basis, the foam fusion uniformity is calculated to be linked with the coverage area after the fire extinguishing agent is fragmented and atomized, so as to more accurately comprehensively evaluate the effect of fire extinguishing agent fragmentation and atomization.

[0055] According to the second aspect of the present invention, the present invention also provides a system for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin. Figure 2 is a block diagram of a system for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage compartment according to an embodiment of the present invention. Figure 2As shown, the device 50 includes a processor and a memory, and the memory stores computer program instructions. When the computer program instructions are executed by the processor, a method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to the first aspect of the present invention is implemented. The device also includes other components well known to those skilled in the art, such as a communication bus and a communication interface, whose settings and functions are known in the art, so they are not described here.

[0056] In the present invention, the aforementioned memory may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, apparatus or device. For example, a computer-readable storage medium may be any appropriate magnetic storage medium or magneto-optical storage medium, such as a resistive random access memory RRAM (Resistive Random Access Memory), a dynamic random access memory DRAM (Dynamic Random Access Memory), a static random access memory SRAM (Static Random-Access Memory), an enhanced dynamic random access memory EDRAM (Enhanced Dynamic Random Access Memory), a high-bandwidth memory HBM (High-Bandwidth Memory), a hybrid memory cube HMC (Hybrid Memory Cube), etc., or any other medium that can be used to store the required information and can be accessed by an application, a module, or both. Any such computer storage medium may be part of a device or accessible or connectable to a device. Any application or module described in the present invention may be implemented using computer-readable / executable instructions that may be stored or otherwise maintained by such a computer-readable medium.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin, characterized in that: include: Perform particle size statistics on multiple foaming images collected to obtain particle reference density; Dividing each foaming image into equal sizes to obtain an average image set, and calculating a density uniformity divergence based on the average image set and the particle reference density; According to the particle size distribution diagram of the foam foaming image, the weight of the quantity proportion of each particle size is counted to calculate the particle uniform dispersion; The foamed foam is crushed and atomized, and multiple atomization images are collected to obtain the atomization coverage area; The foam fusion uniformity is calculated based on the density uniformity divergence and the particle uniformity divergence, and an atomization evaluation index is constructed based on the foam fusion uniformity and the atomization coverage area to evaluate the foam breaking atomization effect.

2. A method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 1, characterized in that: The method of performing particle size statistics on the collected multiple foam foaming images to obtain the particle reference density comprises: Perform particle size statistics on the collected multiple foam foaming images according to a preset image particle analysis system; The particle density corresponding to each foam foaming image was calculated, and the average value of all particle densities was taken as the particle reference density.

3. The method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 1, characterized in that: The dividing each foam foaming image into equal sizes is to randomly divide each foam foaming image into two equal parts, and the calculating of the density uniformity divergence based on the equal-divided image set and the particle reference density includes: Calculate the particle density corresponding to each equally divided image after random bisection; The particle reference density is taken as an average, and the variance between the particle density corresponding to each averaged image and the particle reference density is calculated as the density uniformity divergence.

4. The method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 1, characterized in that: The calculating of the weight of the quantity proportion of each particle size according to the particle size distribution diagram of the foam foaming image to calculate the particle uniform dispersion includes: Counting the number of each particle size in each foam foaming image according to the particle size distribution diagram of the foam foaming image; Calculate the number average of each particle size on a single foam foaming image, as well as the sum of all number averages; The ratio of each quantity average to the sum of all quantity averages is taken as the quantity proportion weight of the corresponding particle size; The particle uniformity of the foam foaming image is calculated based on the proportion weight.

5. A method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 4, characterized in that: The calculating the particle uniformity of the foam foaming image based on the proportion weight comprises: The foam particle size is obtained by multiplying each particle size by the corresponding quantity proportion weight; The variance of all foam particle sizes is calculated to obtain the particle uniform dispersion.

6. A method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 1, characterized in that: The collecting of multiple fog images to obtain the fog coverage area comprises: Collect multiple fog images and convert each fog image into a grayscale image; Calculate the frame difference images of two adjacent fogged grayscale images in sequence, and accumulate all the obtained frame difference images to obtain the fog coverage map; The sizes of connected domains of the atomization coverage graph are counted to obtain the atomization coverage area.

7. A method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 1, characterized in that: When constructing the atomization evaluation index, it is also necessary to count the atomization particle size of the fire extinguishing agent when it is broken and atomized. The atomization evaluation index satisfies the relationship:

8. Among them, Indicates The atomization evaluation index value when evaluating the atomization effect of the fire extinguishing agent. For the The atomization coverage area when evaluating the atomization effect of the fire extinguishing agent is is an activation function, which is used to output a value in the interval [0,1]. For the The atomization particle size when evaluating the atomization effect of the fire extinguishing agent is For the The foam fusion uniformity is evaluated when the fire extinguishing agent is broken and atomized.

9. A method for evaluating the effect of fire extinguishing agent fragmentation and atomization in an energy storage cabin according to claim 7, characterized in that: The foam fusion uniformity satisfies the relationship:

10. Among them, Indicates The density uniformity when evaluating the extinguishing agent fragmentation atomization effect, Indicates The uniform dispersion of particles when evaluating the fragmentation and atomization effect of the fire extinguishing agent.

11. A fire extinguishing agent fragmentation atomization effect evaluation system in an energy storage cabin, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, a method for evaluating the fragmentation and atomization effect of a fire extinguishing agent in an energy storage cabin according to any one of claims 1 to 8 is implemented.

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