A method and system for intelligent flow control of forest fire pumps

Abstract

This invention relates to the field of pump control technology, specifically to an intelligent flow control method and system for forest fire pumps. The method includes: obtaining the fire hazard level of each fire pump based on the overall fire intensity of the affected forest and the differences in the infrared images of the forest fire; obtaining the water demand level of each fire pump based on the fire spread performance and fire hazard level; obtaining the water pressure urgency level of each fire pump based on the water demand level and the real-time upward tilt angle of the fire pump; obtaining the water flow shortage level of each fire pump based on the water pressure urgency level, the real-time travel distance and location coordinates of the fire pump; obtaining the water pressure requirement level of each fire pump based on the water flow shortage level and the positional distribution between the fire pump and the regional fire line; and adjusting the flow rate of the fire pump based on the water pressure requirement level. This invention improves the accuracy of pump flow control.

Description

Technical Field

[0001] This invention relates to the field of pump control technology, specifically to an intelligent flow regulation method and system for forest fire pumps. Background Technology

[0002] Forest fire pumps are crucial equipment for extinguishing forest fires, rapidly delivering water to control the fire, minimize damage, and protect the ecosystem. In the face of forest fires, multiple pumps often work in coordination, with intelligent algorithms controlling the pump flow to effectively manage the fire and maintain the ecological balance of forest resources. Traditionally, PID control algorithms are used to coordinate the water pressure of each fire pump in forest fires to achieve flow regulation. During regulation, a fixed design water pressure value is typically set, and then both the design and actual water pressure values ​​are input into the PID control module. The PID module uses closed-loop feedback to ensure the water pressure remains stable near the design value, thus guaranteeing accurate pump flow output.

[0003] In real-world scenarios, the complex airflow changes within forests lead to unpredictable dynamic changes in fire conditions. Traditional PID control algorithms only consider the steady-state parameters of the water pumps themselves, without taking into account the critical fire situation at each fire pump or the dynamic distribution of each fire pump's location. For example, if a single firefighter extinguishes a fire too quickly or too slowly, it will affect the overall fire-fighting coordination efficiency, resulting in insufficient control accuracy of traditional PID control algorithms and reduced precision in water pump flow control. Summary of the Invention

[0004] This invention provides an intelligent flow control method and system for forest fire pumps to solve existing problems: traditional PID control algorithms only consider the steady state of the pump's own parameters, without considering the critical situation of the fire at each fire pump or the dynamic distribution of the fire pump's location. For example, if a single firefighter extinguishes the fire too quickly or too slowly, it will affect the overall fire extinguishing coordination efficiency, resulting in insufficient control accuracy of traditional PID control algorithms and reduced precision of pump flow control.

[0005] The intelligent flow control method and system for a forest fire pump of the present invention adopts the following technical solution:

[0006] This invention proposes an intelligent flow control method for forest fire pumps, which includes the following steps:

[0007] Acquire infrared images of forest fires, as well as real-time wind direction, wind speed, uplift angle, travel distance, and location coordinates for each fire pump at each location in the forest;

[0008] Obtain the target fire area in the forest from the infrared image of the forest fire; based on the area and temperature of the target fire area, obtain the overall fire intensity of the affected forest;

[0009] Based on the overall fire intensity of the affected forest and the differences of fire pumps in the forest fire infrared image, the fire hazard level of each fire pump is obtained; based on the real-time wind direction, wind speed data and location coordinates of each fire pump at each location in the forest, the fire spread performance of each fire pump is obtained; based on the fire spread performance and fire hazard level, the fire water demand of each fire pump is obtained; based on the fire water demand and the real-time upward tilt angle of the fire pump, the water pressure urgency of each fire pump is obtained; based on the water pressure urgency, the real-time travel distance and location coordinates of the fire pump, the water flow deficit of each fire pump is obtained; the regional fire line of each fire pump is obtained; based on the water flow deficit and the positional distribution between the fire pump and the regional fire line, the water pressure demand of each fire pump is obtained.

[0010] The flow rate of the fire pump is adjusted and controlled based on the water pressure requirement.

[0011] Preferably, the specific method for obtaining the overall fire intensity of the affected forest based on the area and temperature characteristics of the target forest fire zone is as follows:

[0012] The area and temperature of the historical fire zone extracted from the previous forest fire by the fire station are read through the fire data storage system and recorded as the fire area and fire temperature of the historical fire zone, respectively.

[0013] The ratio between the area of ​​the target forest fire zone and the fire area of ​​the historical fire zone is denoted as the fire range ratio; the ratio between the average temperature value of all pixels in the target forest fire zone and the fire temperature of the historical fire zone is denoted as the temperature performance ratio; the product of the fire range ratio and the temperature performance ratio is taken as the overall fire intensity of the affected forest.

[0014] Preferably, the specific method for obtaining the fire hazard level of each fire pump based on the overall fire intensity of the affected forest and the differences of the fire pumps in the forest fire infrared image is as follows:

[0015] In infrared images of forest fires, the first The difference between the temperature value at the location corresponding to each fire pump and the minimum temperature value at all locations corresponding to all fire pumps is recorded as the first difference; the difference between the maximum and minimum temperature values ​​at all locations corresponding to all fire pumps is recorded as the second difference; the ratio of the first difference to the second difference is recorded as the third difference. The fire hazard factors of the first fire pump; The product of the fire hazard factor of each fire pump and the overall fire intensity of the affected forest is used as the first... The fire hazard level of each fire pump.

[0016] Preferably, the specific method for obtaining the fire spread performance of each fire pump based on real-time wind direction, wind speed data, and location coordinates at each location in the forest is as follows:

[0017] In infrared images of forest fires, the center location of the target fire area is compared with the... The straight-line direction between the corresponding locations of the fire pumps is denoted as the first. The direction of the fire beam from the first fire pump; The acute angle between the real-time wind direction of a fire pump and the direction of the fire beam is denoted as the first angle. The wind influence angle of the first fire pump; The normalized value of the cosine of the wind influence angle of the fire pump is used as the first... The wind influence trend of each fire pump;

[0018] The first The normalized value of the difference between the real-time wind speed data of the first fire pump and the minimum real-time wind speed data of all fire pumps is denoted as the wind speed influence factor; the value of the difference between the first fire pump and the minimum real-time wind speed data of all fire pumps is denoted as the wind speed influence factor. The product of the wind influence trend degree and the wind speed influence factor of the fire pump is used as the first... The fire spread performance of each fire pump.

[0019] Preferably, the specific method for obtaining the fire water demand of each fire pump based on the fire spread performance and fire hazard level is as follows:

[0020] The first The normalized value of the product of the fire spread performance and the fire hazard level of each fire pump is used as the first... The fire pump's water demand during a fire.

[0021] Preferably, the specific method for obtaining the water pressure urgency of each fire pump based on the fire's water demand and the real-time upward tilt angle of the fire pump is as follows:

[0022] The first The ratio between the real-time upward tilt angle of the first fire pump and the maximum real-time upward tilt angle of all fire pumps is denoted as the water pressure urgency factor; the water pressure urgency factor is then compared with the first... The product of the fire water demand of each fire pump is used as the first... The urgency of water pressure from each fire pump.

[0023] Preferably, the specific method for obtaining the water flow deficit of each fire pump based on the urgency of water pressure, as well as the real-time travel distance and location coordinates of the fire pump is as follows:

[0024] The geometric center of the forest fire target area is compared with the first The Euclidean distance between the real-time location coordinates of the fire pumps is denoted as the nth. Fire distance values ​​for each fire pump;

[0025] The first The normalized value of the product of the fire distance value, water pressure urgency, and the reciprocal of the real-time travel distance value of each fire pump is used as the first normalized value. Water flow rate deficiency of each fire pump.

[0026] Preferably, the specific method for obtaining the area fire intensity line for each fire pump is as follows:

[0027] Preset a neighborhood parameter In infrared images of forest fires, the first The location corresponding to each fire pump is used as the center of a circular window to obtain the radius. A circular window, and denoted as the first circular window. The fire perimeter of each fire pump; Within the fire neighborhood of each fire pump, curves are formed from all edge pixels of the target forest fire area, serving as the first... The fire line in the area of ​​each fire pump.

[0028] Preferably, the specific method for obtaining the water pressure requirement of each fire pump based on the water flow deficit and the location distribution between the fire pump and the area fire line is as follows:

[0029] In infrared images of forest fires, the first The Euclidean distance between the location of each fire pump and the center point of the fire line in its area is denoted as the i-th. The distance between the fire pump and the midpoint of the fire line in the area; the first The two intersections between the fire line of the fire pump area and the adjacent fire zone are both recorded as boundary points; the first... The average Euclidean distance between the location of each fire pump and the two boundary points is denoted as the nth fire pump. The distance between the two boundaries of each fire pump;

[0030] The first The distance between the fire pump and the midpoint of the fire line in the area is related to the first The ratio between the two boundary distances of the first fire pump and the second fire pump is denoted as the water pressure demand factor; the water pressure demand factor is then compared with the first fire pump. The normalized value of the product of the water flow deficit of each fire pump is used as the first... The water pressure requirements of each fire pump.

[0031] The present invention also proposes an intelligent flow control system for a forest fire pump, comprising a memory and a processor, wherein the processor executes a computer program stored in the memory to implement the steps of the above-described intelligent flow control method for a forest fire pump.

[0032] The beneficial effects of the technical solution of this invention are as follows: This invention obtains the fire hazard level of each fire pump based on the overall fire intensity of the affected forest and the differences in the infrared images of the forest fire; it obtains the water demand level of each fire pump based on the fire spread performance and fire hazard level; it obtains the water pressure urgency level of each fire pump based on the fire water demand level and the real-time upward tilt angle of the fire pump; it obtains the water flow deficit level of each fire pump based on the water pressure urgency level, the real-time travel distance and location coordinates of the fire pump; it obtains the water pressure requirement level of each fire pump based on the water flow deficit level and the positional distribution between the fire pump and the regional fire line; it performs flow regulation control of the fire pump based on the water pressure requirement level; and it optimizes the PID control output results by combining the characteristics of actual forest fire fighting scenarios, achieving adaptive and precise flow regulation based on multi-pump collaborative operation; thereby improving the accuracy of water pump flow control. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating the steps of an intelligent flow control method for a forest fire pump according to the present invention.

[0035] Figure 2 This is a flowchart illustrating the characteristic relationship of an intelligent flow control method for a forest fire pump according to the present invention. Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of an intelligent flow control method and system for a forest fire pump proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0038] The following description, in conjunction with the accompanying drawings, details the specific scheme of the intelligent flow control method and system for forest fire pumps provided by this invention.

[0039] Please see Figure 1 The diagram illustrates a flowchart of a method for intelligent flow control of a forest fire pump according to an embodiment of the present invention. The method includes the following steps:

[0040] Step S001: Acquire infrared images of the forest fire, as well as real-time wind direction, wind speed, uplift angle, path distance, and location coordinates of each fire pump at each location in the forest.

[0041] It should be noted that forest fire pumps are portable and powerful water pumps used for forest fire fighting, exhibiting excellent performance in handling forest fires. Given the inherent danger of forest fires, multiple fire pumps are often used in coordinated operations to manage the situation. Each fire pump is equipped with a PID control module. Traditionally, a fixed water pressure design value is set, and the actual water pressure is stabilized near this design value through closed-loop feedback in the PID control module to control the pump flow rate. However, this traditional control algorithm does not consider the varying fire conditions at different pump locations during forest fire fighting, resulting in low accuracy in pump flow control. Therefore, this embodiment combines the characteristics of actual fire fighting scenarios, adaptively optimizes the water pressure design value parameter in the PID control algorithm, and optimizes the PID water pressure control output, thereby obtaining a more efficient multi-pump flow regulation result for forest fire fighting.

[0042] In one specific implementation of this invention, the method for acquiring infrared images of forest fires, as well as real-time wind direction, wind speed, uplift angle, travel distance, and location coordinates of each fire pump at each location in the forest, is as follows:

[0043] In response to the forest fire, 35 fire pumps were deployed, carried and operated by firefighters. Drones equipped with thermal imaging systems carried by firefighters collected infrared images of the forest fire from above the affected areas. The fire pumps' internal wind sensors recorded real-time wind direction and speed data at each location within the forest. Their attitude sensing modules also recorded real-time tilt angles at each location. The positioning modules within the fire pumps recorded their real-time coordinates. Finally, the positioning modules recorded the distance traveled by the fire pumps from the start of firefighting operations to the current real-time distance traveled.

[0044] Thus, the above methods have yielded infrared images of forest fires, as well as real-time wind direction, wind speed, uplift angle, travel distance, and location coordinates for each fire pump at each location in the forest.

[0045] Step S002: Obtain the target fire area in the forest fire infrared image; based on the area and temperature of the target fire area, obtain the overall fire intensity of the affected forest.

[0046] It should be noted that, considering that the intensity of the fire directly affects the affected area of ​​the forest, the intensity of the fire needs to be analyzed before firefighting to make a rough judgment on the water flow of the fire pumps, so as to facilitate the formulation of corresponding firefighting and water source mobilization strategies. Therefore, in order to make accurate judgments on the water flow of the fire pumps, this step assesses the overall fire intensity of the affected forest in real time based on the infrared image characteristics of the forest fire.

[0047] Preferably, in some implementations of the present invention, temperature values ​​at various locations can be directly read from forest fire infrared images collected by drones above the affected forest; the specific method for obtaining the target fire area of ​​the forest based on the forest fire infrared images is as follows:

[0048] Preset a temperature parameter In this embodiment, This example is used for illustration; no specific limitations are set in this embodiment. It depends on the specific implementation situation;

[0049] For any pixel in an infrared image of a forest fire, if the temperature value of that pixel is greater than or equal to the temperature parameter... Any one of the aforementioned pixels is designated as the target fire pixel.

[0050] In infrared images of forest fires, the largest closed area formed by all target fire pixels is taken as the target fire area.

[0051] Preferably, in some implementations of the present invention, if the real-time fire area is larger than the historical fire area and the temperature is higher, it indicates that the real-time fire intensity of the current forest disaster is greater. The specific method for obtaining the overall fire intensity of the affected forest based on the area and temperature of the target fire area is as follows:

[0052] The area and temperature of the historical fire zone extracted from the previous forest fire by the fire station are read through the fire data storage system and recorded as the fire area and fire temperature of the historical fire zone, respectively.

[0053] The ratio between the area of ​​the target forest fire zone and the fire area of ​​the historical fire zone is denoted as the fire range ratio; the ratio between the average temperature value of all pixels in the target forest fire zone and the fire temperature of the historical fire zone is denoted as the temperature performance ratio; the product of the fire range ratio and the temperature performance ratio is taken as the overall fire intensity of the affected forest.

[0054] The specific formula is as follows:

[0055]

[0056] In the formula, This indicates the overall intensity of the fire in the affected forest; Indicates the area of ​​the forest fire target; The fire area representing the historical fire zone; This represents the average temperature value of all pixels within the forest fire area. This indicates the fire temperature in the area of ​​historical fire.

[0057] Thus, the overall fire intensity of the affected forest was obtained through the above methods.

[0058] Step S003: Based on the overall fire intensity of the affected forest and the differences of the fire pumps in the forest fire infrared image, obtain the fire hazard level of each fire pump; based on the real-time wind direction, wind speed data and location coordinates of each fire pump at each location in the forest, obtain the fire spread performance of each fire pump; based on the fire spread performance and fire hazard level, obtain the fire water demand of each fire pump; based on the fire water demand and the real-time upward tilt angle of the fire pump, obtain the water pressure urgency of each fire pump; based on the water pressure urgency, the real-time travel distance and location coordinates of the fire pump, obtain the water flow shortage of each fire pump; obtain the regional fire line for each fire pump; based on the water flow shortage and the positional distribution between the fire pump and the regional fire line, obtain the water pressure demand of each fire pump.

[0059] It should be noted that, considering the differences in fire situation changes at each fire pump location during firefighting, higher water pressure should be applied to fire pumps with more urgent water needs. Therefore, based on the overall fire intensity, the fire danger level at each fire pump location is obtained by combining the temperature differences at each fire pump location. Then, the fire water demand is obtained by combining the fire spread at each fire pump location as reflected by wind data. Furthermore, the water flow deficiency of each fire pump is obtained by combining the dynamic changes in the distribution of each location during firefighting. At the same time, to prevent firefighters from being trapped in a high-risk situation surrounded by local fires, the water pressure demand of each fire pump is finally obtained by combining the degree of fire encirclement hazard at each fire pump location.

[0060] Preferably, in some implementations of the present invention, if the temperature of a single fire pump tends to be higher in the infrared image of a forest fire, and the overall fire intensity is greater, then the fire danger level at that fire pump location is greater. A specific method for obtaining the fire danger level of each fire pump based on the overall fire intensity of the affected forest and the differences in the infrared images of the fire pumps in the forest fire is as follows:

[0061] In infrared images of forest fires, the first The difference between the temperature value at the location corresponding to each fire pump and the minimum temperature value at all locations corresponding to all fire pumps is recorded as the first difference; the difference between the maximum and minimum temperature values ​​at all locations corresponding to all fire pumps is recorded as the second difference; the ratio of the first difference to the second difference is recorded as the third difference. The fire hazard factors of the first fire pump; The product of the fire hazard factor of each fire pump and the overall fire intensity of the affected forest is used as the first... The fire hazard level of each fire pump;

[0062] The specific formula is as follows:

[0063]

[0064] In the formula, Indicates the first The fire hazard level of each fire pump; The first image in the infrared image of a forest fire Temperature values ​​at the corresponding locations of each fire pump; This represents the minimum temperature value corresponding to the location of all fire pumps in the infrared image of a forest fire. This represents the maximum temperature value corresponding to the location of all fire pumps in the infrared image of a forest fire. This indicates the overall intensity of the fire in the affected forest.

[0065] Preferably, in some implementations of the present invention, wind increases oxygen supply, thereby accelerating the spread of fire. Different wind speeds and directions have varying effects on fire spread; therefore, the degree of fire spread performance is determined based on the influence of wind on fire spread. If the angle between the wind direction of the fire pump and the direction of the fire beam is smaller, it indicates a greater tendency for the wind to blow the fire towards the fire pump. If the wind speed at the fire pump is greater, and the wind direction is more consistent with the fire beam, i.e., the greater the wind influence, the greater the potential for fire spread at the fire pump location. The specific method for obtaining the degree of fire spread performance for each fire pump based on real-time wind direction, wind speed data, and location coordinates at each location in the forest is as follows:

[0066] In infrared images of forest fires, the center location of the target fire area is compared with the... The straight-line direction between the corresponding locations of the fire pumps is denoted as the first. The direction of the fire beam from the first fire pump; The acute angle between the real-time wind direction of a fire pump and the direction of the fire beam is denoted as the first angle. The wind influence angle of the first fire pump; The normalized value of the cosine of the wind influence angle of the fire pump is used as the first... The wind influence trend of each fire pump;

[0067] The first The normalized value of the difference between the real-time wind speed data of the first fire pump and the minimum real-time wind speed data of all fire pumps is denoted as the wind speed influence factor; the value of the difference between the first fire pump and the minimum real-time wind speed data of all fire pumps is denoted as the wind speed influence factor. The product of the wind influence trend degree and the wind speed influence factor of the fire pump is used as the first... The fire spread performance of each fire pump;

[0068] The specific formula is as follows:

[0069]

[0070] In the formula, Indicates the first The fire spread performance of each fire pump; Indicates the first Real-time wind speed data for each fire pump; This represents the minimum real-time wind speed data for all fire pumps; Indicates the first The wind influence trend of each fire pump; This represents the linear normalization function.

[0071] Preferably, in some implementations of the present invention, if the fire pump's fire hazard level reflected by temperature is higher, and the fire pump's fire spread performance reflected by wind influence is also higher, then the real-time fire demand at the fire pump location is higher. The specific method for obtaining the fire water demand level for each fire pump based on the fire spread performance and fire hazard level is as follows:

[0072] The first The normalized value of the product of the fire spread performance and the fire hazard level of each fire pump is used as the first... The fire water demand of each fire pump;

[0073] The specific formula is as follows:

[0074]

[0075] In the formula, Indicates the first The fire water demand of each fire pump; Indicates the first The fire spread performance of each fire pump; Indicates the first The fire hazard level of each fire pump; This represents the linear normalization function.

[0076] It should be noted that during the firefighting process, the upward tilt angle of the fire pump adapts to changes in terrain. For example, when firefighters are spraying water from a low-lying area to a higher-lying area, the upward tilt angle of the fire pump is higher. In this case, part of the kinetic energy of the water after it is sprayed out is used for the conversion of longitudinal potential energy. If the same water pressure is applied as in the case of horizontal tilt angle, the actual water flow rate will be lower. Therefore, the urgency of water pressure can be determined by analyzing the difference in the upward tilt angle between fire pumps based on the water demand of the fire.

[0077] Preferably, in some implementations of the present invention, for a single fire pump location, when facing a high fire water demand, the greater the upward tilt angle, the more urgent the need for higher water pressure; the specific method for obtaining the water pressure urgency of each fire pump based on the fire water demand and the real-time upward tilt angle of the fire pump is as follows:

[0078] The first The ratio between the real-time upward tilt angle of the first fire pump and the maximum real-time upward tilt angle of all fire pumps is denoted as the water pressure urgency factor; the water pressure urgency factor is then compared with the first... The product of the fire water demand of each fire pump is used as the first... The urgency of water pressure from each fire pump;

[0079] The specific formula is as follows:

[0080]

[0081] In the formula, Indicates the first The urgency of water pressure from each fire pump; Indicates the first The real-time upward tilt angle of each fire pump; This represents the maximum real-time upward tilt angle of all fire pumps; Indicates the first The fire pump's water demand during a fire.

[0082] Preferably, in some implementations of the present invention, during forest fire fighting, the target fire area should gradually approach a circle for better control. Therefore, the dynamic changes in the location of each fire pump are analyzed to obtain the water flow deficit of each fire pump. If the real-time travel distance of a certain fire pump is smaller than that of other fire pumps, it indicates that the fire pump location is slower in reaching the center of the fire. At the same time, if the distance between the fire pump and the target fire area is larger, combined with the greater urgency of water pressure, it indicates that the water flow of that fire pump needs to be replenished more. The specific method for obtaining the water flow deficit of each fire pump based on the urgency of water pressure, the real-time travel distance, and the location coordinates of the fire pump is as follows:

[0083] The geometric center of the forest fire target area is compared with the first The Euclidean distance between the real-time location coordinates of the fire pumps is denoted as the nth. Fire distance values ​​for each fire pump;

[0084] The first The normalized value of the product of the fire distance value, water pressure urgency, and the reciprocal of the real-time travel distance value of each fire pump is used as the first normalized value. Water flow rate deficiency of each fire pump;

[0085] The specific formula is as follows:

[0086]

[0087] In the formula, Indicates the first Water flow rate deficiency of each fire pump; Indicates the first The urgency of water pressure from each fire pump; Indicates the first Fire distance values ​​for each fire pump; Indicates the first Real-time travel distance of each fire pump; This represents the linear normalization function.

[0088] Preferably, the specific method for obtaining the area fire intensity line for each fire pump is as follows:

[0089] Preset a neighborhood parameter In this embodiment, This example is used for illustration; no specific limitations are set in this embodiment. It depends on the specific implementation situation;

[0090] In infrared images of forest fires, the first The location corresponding to each fire pump is used as the center of a circular window to obtain the radius. A circular window, and denoted as the first circular window. The fire perimeter of each fire pump; Within the fire neighborhood of each fire pump, curves are formed from all edge pixels of the target forest fire area, serving as the first... The fire line in the area of ​​each fire pump.

[0091] Preferably, in some implementations of the present invention, due to the complexity of fire conditions, some firefighters face different fire lines. If firefighters do not deal with the fire in time and only extinguish the fire directly in front of them, without having time to deal with the fires on both sides, the fire line may gradually engulf the firefighters, greatly reducing the safety risks to the firefighters. Therefore, based on the water flow deficit, the fire encirclement hazard situation is analyzed to obtain the water pressure demand of the fire pumps. The specific method for obtaining the water pressure demand of each fire pump based on the water flow deficit and the positional distribution between the fire pumps and the area fire line is as follows:

[0092] In infrared images of forest fires, the first The Euclidean distance between the location of each fire pump and the center point of the fire line in its area is denoted as the i-th. The distance between the fire pump and the midpoint of the fire line in the area; the first The two intersections between the fire line of the fire pump area and the adjacent fire zone are both recorded as boundary points; the first... The average Euclidean distance between the location of each fire pump and the two boundary points is denoted as the nth fire pump. The distance between the two boundaries of each fire pump;

[0093] The first The distance between the fire pump and the midpoint of the fire line in the area is related to the first The ratio between the two boundary distances of the first fire pump and the second fire pump is denoted as the water pressure demand factor; the water pressure demand factor is then compared with the first fire pump. The normalized value of the product of the water flow deficit of each fire pump is used as the first... The water pressure requirement of each fire pump;

[0094] The specific formula is as follows:

[0095]

[0096] In the formula, Indicates the first The water pressure requirement of each fire pump; Indicates the first Distance between each fire pump and the midpoint of the fire line in the area; Indicates the first The distance between the two boundaries of each fire pump; Indicates the first Water flow rate deficiency of each fire pump; Indicates the first The urgency of water pressure from each fire pump; This represents the linear normalization function.

[0097] It should be noted that the greater the distance between the fire pump and the midpoint of the fire line in the area compared to the distances to the two sides, the greater the potential danger of the fire pump location being surrounded by fire in real time, and the higher the degree of fire hazard. At the same time, the greater the water flow deficiency of the fire pump, the higher the water pressure demand of the fire pump location.

[0098] Thus, the water pressure requirement of each fire pump is obtained through the above method.

[0099] Step S004: Adjust and control the flow rate of the fire pump based on the water pressure requirement.

[0100] Preferably, in some implementations of the present invention, the specific method for regulating and controlling the flow rate of the fire pump based on the water pressure demand is as follows:

[0101] The first The water pressure requirement of each fire pump is related to the first The product of the rated water pressure values ​​of each fire pump is used as the first... The water pressure design value of each fire pump is obtained; then the water pressure design value of each fire pump is input into the PID control algorithm to coordinate the water pressure of each fire pump in forest fires in order to achieve flow regulation.

[0102] The PID control algorithm is existing technology and will not be described in detail here.

[0103] Please see Figure 2 It shows a flowchart illustrating the characteristic relationship of an intelligent flow control method for forest fire pumps;

[0104] Through the above steps, a method for intelligent flow control of forest fire pumps is completed.

[0105] Another embodiment of the present invention provides an intelligent flow control system for a forest fire pump. The system includes a memory and a processor. When the processor executes the computer program stored in the memory, it performs the above-described method steps S001 to S004.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for intelligent flow control of a forest fire pump, characterized in that, The method includes the following steps: Acquire infrared images of forest fires, as well as real-time wind direction, wind speed, uplift angle, travel distance, and location coordinates for each fire pump at each location in the forest; Obtain the target fire area in the forest from the infrared image of the forest fire; based on the area and temperature of the target fire area, obtain the overall fire intensity of the affected forest; Based on the overall fire intensity of the affected forest and the differences of fire pumps in the forest fire infrared image, the fire hazard level of each fire pump is obtained; based on the real-time wind direction, wind speed data and location coordinates of each fire pump at each location in the forest, the fire spread performance of each fire pump is obtained; based on the fire spread performance and fire hazard level, the fire water demand of each fire pump is obtained; based on the fire water demand and the real-time upward tilt angle of the fire pump, the water pressure urgency of each fire pump is obtained; based on the water pressure urgency, the real-time travel distance and location coordinates of the fire pump, the water flow deficit of each fire pump is obtained; the regional fire line of each fire pump is obtained; based on the water flow deficit and the positional distribution between the fire pump and the regional fire line, the water pressure demand of each fire pump is obtained. The flow rate of the fire pump is adjusted and controlled based on the water pressure requirement.

2. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the overall fire intensity of the affected forest based on the area and temperature characteristics of the target fire zone is as follows: The area and temperature of the historical fire zone extracted from the previous forest fire by the fire station are read through the fire data storage system and recorded as the fire area and fire temperature of the historical fire zone, respectively. The ratio between the area of ​​the target forest fire zone and the fire area of ​​the historical fire zone is denoted as the fire range ratio; the ratio between the average temperature value of all pixels in the target forest fire zone and the fire temperature of the historical fire zone is denoted as the temperature performance ratio; the product of the fire range ratio and the temperature performance ratio is taken as the overall fire intensity of the affected forest.

3. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the fire hazard level of each fire pump based on the overall fire intensity of the affected forest and the differences of the fire pumps in the infrared images of the forest fire is as follows: In infrared images of forest fires, the first The difference between the temperature value at the location corresponding to each fire pump and the minimum temperature value at all locations corresponding to all fire pumps is recorded as the first difference; the difference between the maximum and minimum temperature values ​​at all locations corresponding to all fire pumps is recorded as the second difference; the ratio of the first difference to the second difference is recorded as the third difference. The fire hazard factors of the first fire pump; The product of the fire hazard factor of each fire pump and the overall fire intensity of the affected forest is used as the first... The fire hazard level of each fire pump.

4. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the fire spread performance of each fire pump based on real-time wind direction, wind speed data, and location coordinates at each location in the forest is as follows: In infrared images of forest fires, the center location of the target fire area is compared with the first... The straight-line direction between the corresponding locations of the fire pumps is denoted as the first. The direction of the fire beam from the first fire pump; The acute angle between the real-time wind direction of a fire pump and the direction of the fire beam is denoted as the first angle. The wind influence angle of the first fire pump; The normalized value of the cosine of the wind influence angle of the fire pump is used as the first... The wind influence trend of each fire pump; The first The normalized value of the difference between the real-time wind speed data of the first fire pump and the minimum real-time wind speed data of all fire pumps is denoted as the wind speed influence factor; the value of the difference between the first fire pump and the minimum real-time wind speed data of all fire pumps is denoted as the wind speed influence factor. The product of the wind influence trend degree and the wind speed influence factor of the fire pump is used as the first... The fire spread performance of each fire pump.

5. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the fire water demand of each fire pump based on the fire spread rate and fire hazard level is as follows: The first The normalized value of the product of the fire spread performance and the fire hazard level of each fire pump is used as the first... The fire pump's water demand during a fire.

6. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the water pressure urgency of each fire pump based on the fire's water demand and the real-time upward tilt angle of the fire pump is as follows: The first The ratio between the real-time upward tilt angle of the first fire pump and the maximum real-time upward tilt angle of all fire pumps is denoted as the water pressure urgency factor; the water pressure urgency factor is then compared with the first... The product of the fire water demand of each fire pump is used as the first... The urgency of water pressure on each fire pump.

7. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the water flow deficit of each fire pump based on the urgency of water pressure, as well as the real-time travel distance and location coordinates of the fire pump is as follows: The geometric center of the forest fire target area is compared with the first The Euclidean distance between the real-time location coordinates of the fire pumps is denoted as the nth. Fire distance values ​​for each fire pump; The first The normalized value of the product of the fire distance value, water pressure urgency, and the reciprocal of the real-time travel distance value of each fire pump is used as the first normalized value. Water flow rate deficiency of each fire pump.

8. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the area fire intensity line for each fire pump is as follows: Preset a neighborhood parameter In infrared images of forest fires, the first The location corresponding to each fire pump is used as the center of a circular window to obtain the radius. A circular window, and denoted as the first circular window. The fire perimeter of each fire pump; Within the fire neighborhood of each fire pump, curves are formed from all edge pixels of the target forest fire area, serving as the first... The fire line in the area of ​​each fire pump.

9. The intelligent flow control method for a forest fire pump according to claim 1, characterized in that, The specific method for obtaining the water pressure requirement of each fire pump based on the water flow deficit and the location distribution between the fire pump and the area fire line is as follows: In infrared images of forest fires, the first The Euclidean distance between the location of each fire pump and the center point of the fire line in its area is denoted as the i-th. The distance between the fire pump and the midpoint of the fire line in the area; the first The two intersections between the fire line of the fire pump area and the adjacent fire zone are both recorded as boundary points; the first... The average Euclidean distance between the location of each fire pump and the two boundary points is denoted as the nth fire pump. The distance between the two boundaries of each fire pump; The first The distance between the fire pump and the midpoint of the fire line in the area is related to the first The ratio between the two boundary distances of the first fire pump and the second fire pump is denoted as the water pressure demand factor; the water pressure demand factor is then compared with the first fire pump. The normalized value of the product of the water flow deficit of each fire pump is used as the first... The water pressure requirements of each fire pump.

10. An intelligent flow control system for a forest fire pump, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the computer program is executed by the processor, it implements the steps of the intelligent flow control method for a forest fire pump as described in any one of claims 1-9.

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