Foam spreading and fire extinguishing performance testing device based on submerged image recognition technology

Abstract

The utility model discloses a foam spreading and fire extinguishing performance testing device based on a submerged image recognition technology, which comprises an oil tray, an image acquisition device, a magnetic fluorescent sticker and an image processing device, the image processing device is electrically connected with the image acquisition device through a network cable, and the oil tray comprises an oil tray main body, an anti-burning tank and supporting legs, the image acquisition equipment comprises a camera I arranged at the top of the oil pan main body and submerged camera equipment arranged on the inner side of the oil pan main body, the submerged camera equipment comprises a submerged camera II, a submerged camera III and a submerged camera IV, the submerged camera III is arranged in the center of the oil pan main body, and the submerged camera IV is arranged in the center of the oil pan main body; the magnetic fluorescent stickers are arranged at the bottoms of the two side tray walls of the oil tray body. Dynamic changes such as a foam flowing track, a foam fire extinguishing behavior and an ignited fuel area are captured and collected from an upper view angle and a lower view angle of a foam layer, interference of flames on observation or collection of the foam coverage area is avoided, the foam spreading speed in the fire extinguishing process is accurately calculated, and the 25% anti-burning time of a foam fire extinguishing agent is judged.

Description

Technical Field

[0001] The utility model belongs to the technical field of foam fire extinguishing agent performance testing, and relates to a foam spreading and fire extinguishing performance testing device based on underwater image recognition technology. Background Art

[0002] The spreading performance of fire extinguishing foam on the surface of liquid fuel is an important factor affecting the fire extinguishing performance of foam fire extinguishing agents, especially the fire control time. The faster the foam spreading speed, the shorter the foam fire control time, and the more conducive it is to quickly control the development of the fire. The foam spreading performance is closely related to the foam performance, fuel type and fuel temperature. Due to the differences in foam multiples, foam viscosity, etc. of water-forming film-forming, protein and anti-soluble foam fire extinguishing agents, when fighting fires of liquid fuels such as gasoline and alcohol, the spreading speed of different types of foam on the fuel surface, especially the flow trajectory, has obvious differences. At present, existing patent technical documents: CN115060627A, CN116699055A, etc. all observe and record the foam flow trajectory by arranging image acquisition equipment above the foam. Due to the interference of the flame above the fuel, such devices cannot clearly observe and record the flow trajectory and spreading speed of the foam.

[0003] In addition, during the inspection and testing of the fire extinguishing performance of foam fire extinguishing agents, the fire extinguishing time and 25% anti-burning time of the foam fire extinguishing agent are generally tested by visual inspection or radiation heat flux, which has problems such as cumbersome timing and observation errors. In particular, during the observation of the 25% anti-burning time, external environments such as flames and smoke interfere with the accuracy of measuring the ignited fuel area. Utility Model Content

[0004] In order to comprehensively solve the problems existing in the above-mentioned existing foam fire extinguishing agent performance test, the utility model provides a foam spreading and fire extinguishing performance test device based on underwater image recognition technology.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: a foam spreading and fire extinguishing performance testing device based on underwater image recognition technology, including an oil pan, an image acquisition device, a magnetic fluorescent sticker and an image processing device. The image processing device is electrically connected to the image acquisition device through a network cable. The oil pan includes an oil pan body, a burning tank and support legs. The image acquisition device includes a camera 1 arranged on the top of the oil pan body and an underwater camera device arranged on the inner side of the oil pan body. The underwater camera equipment includes underwater camera 2, underwater camera 3 and underwater camera 4 respectively. The underwater camera 3 is arranged at the center of the oil pan body, and the magnetic fluorescent sticker is arranged at the bottom of the pan wall on both sides of the oil pan body.

[0006] Preferably, the second, third and fourth underwater cameras are fixed at equal intervals on the center line of the bottom of the oil pan body by means of a bolt structure.

[0007] Preferably, the magnetic fluorescent sticker is arranged at the bottom of the oil pan wall below the fuel liquid level in the oil pan body by magnetic attraction.

[0008] Preferably, the magnetic fluorescent stickers are symmetrically distributed with respect to the center line of the underwater camera device.

[0009] Preferably, the anti-burning tank is arranged at the center position inside the oil pan body.

[0010] Preferably, the supporting legs are provided in no less than three groups and are uniformly welded to the bottom of the oil pan body.

[0011] Compared with the existing technology, the utility model uses image acquisition equipment to capture dynamic changes such as foam flow trajectory, foam fire extinguishing behavior and ignited fuel area from two perspectives above and below the foam layer, avoiding the interference of flames on the observation or collection of foam coverage area. It can be used to accurately calculate the foam spreading speed during the fire extinguishing process, and determine the 25% anti-burning time of the foam fire extinguishing agent, thereby improving the accuracy of the test.

[0012] The oil pan holds liquid fuel for fire extinguishing tests. The burn canister is placed in the center of the pan after extinguishing the fire to test the 25% burnout time of the foam fire extinguishing agent. Camera 1 captures the changes in the oil pan's combustion behavior from above the foam layer after fire control to measure the foam extinguishing time. Submersible camera 3 captures the foam flow trajectory from below the foam layer in real time to measure the foam spreading speed. Submersible cameras 2 and 4 observe and record the changes in foam coverage in their respective areas from below the foam layer in real time, preventing camera 3 from being obscured by the burn canister placed in the center of the oil pan. This allows them to measure the changes in the ignited fuel area and thus determine the 25% burnout time of the foam fire extinguishing agent. Magnetic fluorescent stickers are used to distinguish the acquisition ranges of cameras 2 and 4. Camera 2 captures the left half of the line connecting the two magnetic fluorescent stickers, while camera 4 captures the right half of the line connecting the two magnetic fluorescent stickers. Image processing equipment displays the acquired images over time in real time and binarizes the captured images to calculate the foam area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of the foam spreading and fire extinguishing performance testing device based on underwater image recognition technology of the utility model;

[0015] Figure 2 This is a schematic diagram of the position structure of the underwater camera equipment of the foam spreading and fire extinguishing performance test device based on the underwater image recognition technology of the utility model;

[0016] In the figure: 1 oil pan body, 2 anti-burning tank, 3 support legs, 4 image processing equipment, 5 underwater camera equipment, 6 camera 1, 7 underwater camera 2, 8 underwater camera 3, 9 underwater camera 4, 10 magnetic fluorescent sticker. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1 and Figure 2As shown, this embodiment provides a foam spreading and fire extinguishing performance testing device based on underwater image recognition technology, including an oil pan, an image acquisition device, a magnetic fluorescent sticker 10 and an image processing device 4, the image processing device 4 is electrically connected to the image acquisition device through a network cable, the oil pan includes an oil pan body 1, a burn-resistant tank 2 and a support leg 2, the image acquisition device includes a camera 1 6 arranged on the top of the oil pan body 1 and an underwater camera device 5 arranged on the inner side of the oil pan body 1, the underwater camera device 5 respectively includes an underwater camera 2 7, an underwater camera 3 8 and an underwater camera 4 9, the underwater camera 3 8 is arranged at the center of the oil pan body 1, and the magnetic fluorescent sticker 10 is arranged at the bottom of the disk wall on both sides of the oil pan body 1.

[0021] In this embodiment, the oil pan body 1 is used to hold liquid fuel for fire extinguishing tests, and the anti-burn tank 2 is used to be placed in the center of the oil pan after fire extinguishing to test the 25% anti-burn time of the foam fire extinguishing agent; the camera 1 6 collects the burning behavior change process of the oil pan after fire control from above the foam layer to measure the foam fire extinguishing time; the underwater camera 3 8 captures the foam flow trajectory in real time from below the foam layer to measure the foam spreading speed; the underwater camera 2 7 and the underwater camera 4 9 observe and record the changes in the foam coverage area in their respective areas in real time from below the foam layer to avoid the underwater camera 3 8 being blocked by the anti-burn tank 2 placed in the center of the oil pan, so as to measure the changes in the area of ​​the ignited fuel and then determine the 25% anti-burn time of the foam fire extinguishing agent. The magnetic fluorescent sticker 10 is used to distinguish the acquisition range of the underwater camera 2 7 and the underwater camera 4 9, wherein the underwater camera 2 7 is responsible for acquiring the left half of the center of the line connecting the two magnetic fluorescent stickers 10, and the underwater camera 4 9 is responsible for acquiring the right half of the center of the line connecting the two magnetic fluorescent stickers 10; the image processing device 4 is used to display the changes of the acquired image over time in real time, and at the same time binarize the acquired image and calculate the foam area.

[0022] As a preferred embodiment, the underwater camera 2 7 , the underwater camera 3 8 and the underwater camera 4 9 are fixed at equal intervals on the bottom center line of the oil pan body 1 by a bolt structure to ensure the stability of the installation of the camera equipment.

[0023] As a preferred embodiment, the magnetic fluorescent sticker 10 is arranged on the bottom of the oil pan wall below the fuel liquid level in the oil pan body 1 by magnetic attraction.

[0024] As a preferred embodiment, the magnetic fluorescent sticker 10 is symmetrically distributed with respect to the center line of the underwater camera device 5 .

[0025] As a preferred embodiment, the anti-burning tank 2 is arranged at the center of the inner side of the oil pan body 1 to ensure the accuracy of the experiment.

[0026] As a preferred embodiment, the support legs 3 are provided in no less than three groups and are uniformly welded to the bottom of the oil pan body 1 to ensure the stability of the entire device.

[0027] The test device of the utility model is used to test the foam spreading performance and fire extinguishing performance, and the steps are as follows:

[0028] Step 1: Turn on the image processing device 4 and all image acquisition devices, adjust the angle and focal length of the image acquisition devices, ensure that the camera 1 6 and the underwater camera 8 set on the top of the oil pan body 1 observe the entire oil pan area S1, and ensure that the underwater camera 2 7 and the underwater camera 4 9 respectively cover their respective detection areas;

[0029] Step 2: Add fuel to the oil pan body 1 until the fuel level is higher than the magnetic fluorescent sticker 10, ignite it, and start timing t0; adjust the image processing device to the real-time display interface of camera 1 6 and underwater camera 3 8, and start applying foam to the oil pan body 1 after a certain pre-burning time;

[0030] Step 3: Binarize the foam flow trajectory and coverage area captured by the underwater camera 38 to obtain the foam area S at different time points. Derivative the foam area S with respect to time to obtain the foam spreading speed.

[0031] Step 4: When the foam image captured by camera 6 shows that the fire is extinguished, the time is recorded as t1, and the fire extinguishing time t=t1-t0;

[0032] Step 5: Place the burn-resistant tank 2 (area S2) filled with liquid fuel in the center of the oil pan and set the time t2, turn off camera 1 6 and underwater camera 3 8, and adjust the image processing device to the real-time display interface of underwater camera 2 7 and underwater camera 4 9;

[0033] Step 6: Binarize the images captured by the underwater camera 2 7 and the underwater camera 4 9 to obtain the foam area S at different times. When 25% of the fuel area, that is, the foam layer (S1-S2) / 4 disappears, it is recorded as time t3. The 25% anti-burning time of the foam fire extinguishing agent is t=t3-t2.

[0034] The utility model uses image acquisition equipment to capture dynamic changes such as foam flow trajectory, foam fire extinguishing behavior, and ignited fuel area from two perspectives above and below the foam layer, avoiding the interference of flames on the observation or collection of foam coverage area. It can be used to accurately calculate the foam spreading speed during the fire extinguishing process and determine the 25% anti-burn time of the foam fire extinguishing agent.

[0035] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A foam spreading and fire extinguishing performance testing device based on underwater image recognition technology, characterized in that: The invention comprises an oil pan, an image acquisition device, a magnetic fluorescent sticker (10) and an image processing device (4), wherein the image processing device (4) is electrically connected to the image acquisition device via a network cable, the oil pan comprises an oil pan body (1), an anti-burning tank (2) and a support leg (3), the image acquisition device comprises a camera 1 (6) arranged on the top of the oil pan body (1) and an underwater camera device (5) arranged on the inner side of the oil pan body (1), the underwater camera device (5) comprises an underwater camera 2 (7), an underwater camera 3 (8) and an underwater camera 4 (9), respectively, the underwater camera 3 (8) is arranged at the center of the oil pan body (1), and the magnetic fluorescent sticker (10) is arranged at the bottom of the pan wall on both sides of the oil pan body (1).

2. The foam spreading and fire extinguishing performance testing device based on underwater image recognition technology according to claim 1, characterized in that: The underwater camera 2 (7), the underwater camera 3 (8) and the underwater camera 4 (9) are fixed at equal intervals on the bottom center line of the oil pan body (1) through a bolt structure.

3. The foam spreading and fire extinguishing performance testing device based on underwater image recognition technology according to claim 2, characterized in that: The magnetic fluorescent sticker (10) is arranged on the bottom of the oil pan wall below the fuel liquid level in the oil pan body (1) by magnetic attraction.

4. The foam spreading and fire extinguishing performance testing device based on underwater image recognition technology according to claim 3, characterized in that: The magnetic fluorescent sticker (10) is symmetrically distributed with respect to the center line of the underwater imaging device (5).

5. The foam spreading and fire extinguishing performance testing device based on underwater image recognition technology according to claim 1, characterized in that: The anti-burning tank (2) is arranged at the center position inside the oil pan body (1).

6. The foam spreading and fire extinguishing performance testing device based on underwater image recognition technology according to claim 1, characterized in that: The supporting legs (3) are provided in no less than three groups and are uniformly welded to the bottom of the oil pan body (1).

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