Visual Intelligent Fire Detection, Warning and Linkage System and Method

Abstract

The present invention provides a visual intelligent fire detection, warning and linkage system and method, which relates to the field of intelligent fire protection. Among them, the system includes: a detection subsystem, which sets detection devices in the area to be detected through a preset detection point positioning algorithm to conduct air leakage monitoring, temperature difference monitoring and fire location monitoring; a data processing subsystem, which processes the situation of gas leakage or abnormal temperature in the area to be detected through a preset emergency response strategy, generates fire protection equipment preparation parameters, locates the fire point, and generates fire protection equipment start parameters; a warning response subsystem, which conducts a secondary determination on the situation of gas leakage or abnormal temperature; is used to drive the fire protection equipment to be in a standby state according to the fire protection equipment preparation parameters, and start the fire protection equipment to be in a working state according to the fire protection equipment start parameters; through the present application, the fire protection equipment is put in a standby state in advance by alarming for abnormal situations, thereby improving the processing efficiency of emergency events.

Description

Technical Field

[0001] This document relates to the field of intelligent fire protection technology, and particularly to a visual intelligent fire detection, early warning and linkage system and method. Background Art

[0002] From the overall perspective of the development of flammable gases, there is a risk of leakage during the chemical production process, transportation and storage of flammable and explosive gases. Once these gases leak and accumulate in the surrounding environment, it may lead to malignant accidents such as fires, explosions and poisoning. For example, during operations at liquid bulk terminal storage areas, etc., leakage and abnormal temperature conditions are likely to occur at the connection parts of operating equipment. However, the current fire monitoring and early warning system cannot achieve fire emergency response linkage, and most fire-fighting equipment is only activated when a danger occurs. However, the time from when the gas concentration reaches a certain level to an explosion is extremely short, and it often takes 1 - 2 minutes for the fire pump to reach the working pressure. Therefore, it is very likely that the danger that occurs during the process of filling the fire pipeline with water cannot be handled, resulting in major potential safety hazards. Summary of the Invention

[0003] The present invention provides a visual intelligent fire detection, early warning and linkage system and method, aiming to solve the above problems.

[0004] An embodiment of the present invention provides a visual intelligent fire detection, early warning and linkage system, including:

[0005] A detection subsystem, a data processing subsystem, an early warning response subsystem, a fire-fighting drive processing subsystem, and fire-fighting equipment;

[0006] The detection subsystem is used to set the detection device in the area to be detected through a preset detection point positioning algorithm. The detection device obtains first monitoring data by monitoring air leakage in the area to be detected, obtains second monitoring data by monitoring temperature difference, and obtains third monitoring data by locating the fire in the area to be detected;

[0007] The data processing subsystem is used to detect and give early warning of gas leakage in the area to be detected according to the first monitoring data; detect and give early warning of abnormal temperature in the area to be detected according to the second monitoring data; obtain the ignition point in the area to be detected according to the third monitoring data for positioning, generate fire-fighting equipment start parameters, and send them to the fire-fighting drive processor. Among them, if gas leakage or abnormal temperature occurs in the area to be detected, it is processed through a preset emergency response strategy, and fire-fighting equipment preparation parameters are generated and sent to the fire-fighting drive processor;

[0008] The early warning response subsystem is used to make a secondary determination on the occurrence of gas leakage or abnormal temperature in the area to be detected;

[0009] A fire-fighting drive processor is used to drive a fire-fighting device to be in a standby state according to fire-fighting device standby parameters, and to start the fire-fighting device to be in a working state according to the fire-fighting device start parameters;

[0010] A fire-fighting device is used to be in a standby state or a working state under the drive of a fire-fighting drive processor.

[0011] An embodiment of the present invention provides a visual intelligent fire detection and early warning linkage method, including:

[0012] The detection subsystem sets detection devices in the area to be detected by using a preset detection point positioning algorithm. The detection devices obtain first monitoring data by monitoring air leakage in the area to be detected, obtain second monitoring data by monitoring temperature difference, and obtain third monitoring data by monitoring fire location;

[0013] The data processing subsystem detects and warns of gas leakage in the area to be detected according to the first monitoring data; detects and warns of temperature anomalies in the area to be detected according to the second monitoring data; locates the ignition point in the area to be detected according to the third monitoring data, generates fire-fighting device start parameters, and sends them to the fire-fighting drive processor. Among them, if gas leakage or temperature anomaly occurs in the area to be detected, it is processed through a preset emergency response strategy, generates fire-fighting device standby parameters, and sends them to the fire-fighting drive processor;

[0014] The early warning response subsystem makes a secondary determination on the occurrence of gas leakage or temperature anomaly in the area to be detected;

[0015] The fire-fighting drive processor drives the fire-fighting device to be in a standby state according to the fire-fighting device standby parameters, and starts the fire-fighting device to be in a working state according to the fire-fighting device start parameters;

[0016] The fire-fighting device is in a standby state or a working state under the drive of the fire-fighting drive processor. By adopting the embodiment of the present invention, the detection subsystem comprehensively monitors gas leakage, temperature anomaly and fire location by using a preset detection point positioning algorithm. The data processing subsystem generates fire-fighting device standby parameters for gas leakage and temperature anomaly situations. After a secondary determination by the early warning response subsystem, subsequent operations are carried out, the fire location is accurately located, fire-fighting device start parameters are generated, and the fire-fighting device is driven to aim at the fire location. This application adopts two different schemes when the gas leakage and temperature anomaly reach the warning value and the linkage value, and realizes the most accurate and rapid prevention of dangerous situations on the basis of the least calculation in the data processing subsystem. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments recorded in this specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the visual intelligent fire detection, warning and linkage system according to an embodiment of the present invention;

[0019] Figure 2 Steps of the preset detection point positioning algorithm according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the force on the jet microelement according to an embodiment of the present invention;

[0021] Figure 4 Flowchart of the visual intelligent fire detection, warning and linkage method according to an embodiment of the present invention. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the following will clearly and completely describe the technical solutions in one or more embodiments of this specification in conjunction with the accompanying drawings in one or more embodiments of this specification. Obviously, the described embodiments are only some embodiments of this specification, rather than all embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this document.

[0023] System embodiment

[0024] According to an embodiment of the present invention, a visual intelligent fire detection, warning and linkage system is provided. Figure 1 Schematic diagram of the visual intelligent fire detection, warning and linkage system according to an embodiment of the present invention. According to Figure 1 As shown, the visual intelligent fire detection, warning and linkage system according to an embodiment of the present invention specifically includes:

[0025] Detection subsystem 10, data processing subsystem 11, warning response subsystem 12, fire driving and processing subsystem 13, and fire equipment 14;

[0026] The detection subsystem 10 is used to set the detection device in the detected area through a preset detection point positioning algorithm. The detection device obtains first monitoring data by monitoring air leakage in the detected area, obtains second monitoring data by monitoring temperature difference, and obtains third monitoring data by monitoring fire location. The detection subsystem 10 specifically includes: a detection device, a detection point positioning module, a coordinate sending module, and a visual module;

[0027] The detection device uses a sensor detection device or a visual detection device to monitor air leakage, temperature difference, and fire location in the detected area. The sensor detection device includes: a toxic and combustible gas monitoring device and a temperature sensor device. The toxic and combustible gas monitoring device monitors the leakage of toxic gases and issues an alarm. The temperature sensor device monitors the temperature difference and issues an alarm for abnormal temperature conditions. The toxic and combustible gas monitoring device and the temperature sensor device are installed at preset positions; The visual detection device includes: N hyperspectral Fourier gas telemetry devices and M dual-spectrum thermal imaging devices, etc.; The hyperspectral Fourier gas telemetry device is specifically used for: obtaining a hyperspectral image of the detected area and using Fourier transform infrared spectroscopy to obtain the gas types and gas concentrations in the detected area as the first monitoring data; The dual-spectrum thermal imaging device is used to obtain an infrared radiation characteristic image and obtain the temperature value through a thermal radiation algorithm as the second monitoring data; Obtaining the image collected by the detection device at the first observation position point as the first smoke image, the image collected by the detection device at the second observation position point as the second smoke image, and using the first smoke image and the second smoke image as the third monitoring data;

[0028] The detection device in the embodiments of the present invention can be selected according to the specific area to be detected. In the embodiments of the present invention, hyperspectral Fourier telemetry is preferably used for gas leakage monitoring. When performing gas leakage monitoring, the hyperspectral Fourier telemetry technology can be used to detect the change of gas concentration in the atmosphere, so as to realize the monitoring of gas leakage. The specific steps are as follows: First, use the hyperspectral imaging device to collect data in the monitoring area to obtain the spectral information of various gases in the atmosphere. These spectral data include the reflected spectral data in different wavelength ranges. Preprocess and correct the collected hyperspectral data, including atmospheric correction, radiation correction, etc. At the same time, according to the spectral characteristics of the target gas, extract the spectral data related to the target gas. Compare and analyze the extracted target gas spectral data with the known gas spectral database to determine the type and concentration of the target gas in the monitoring area. Use the spatial positioning function provided by the hyperspectral Fourier telemetry instrument to determine the location and scope of the target gas leakage in the monitoring area. Through the above steps, the hyperspectral Fourier telemetry technology can be used to realize the monitoring of gas leakage. This technology has high spatial resolution and spectral resolution, can accurately obtain the spectral information of various gases in the atmosphere, and realize the timely monitoring and rapid response to gas leakage.

[0029] In an embodiment of the present invention, gas leakage can also be detected by a TDLAS camera. The TDLAS camera can monitor methane gas within a range of 50 m and is suitable for applications in scenarios such as natural gas pipelines, receiving stations, wharves, and underground pipe galleries.

[0030] In an embodiment of the present invention, gas leakage can also be monitored by a gas cloud imaging camera. The imaging technology adopted by the gas cloud imaging camera can be divided into heat source imaging technology and spectral imaging technology. The heat source imaging technology refers to the thermal imaging technology that collects the radiation information of a certain infrared band of the gas target scene to realize gas leakage detection. Its detection system often has advantages such as relatively simple structure, lower complexity of the optical system, and lower maintenance cost. The spectral imaging technology refers to using the absorption difference of different components of gas in specific infrared wavelengths to identify different gases, making a more refined distinction of the characteristics of the gas, and being able to more accurately identify the type and concentration characteristics of the gas. The advantages in aspects such as gas identification, range marking, and identification accuracy in extreme weather are more prominent. The gas cloud imaging camera is suitable for VOCs emission monitoring and can realize intelligent patrol inspection of dangerous areas such as hazardous chemical ports, oil and gas fields, oil refining, chemical industry, and natural gas pipelines, as well as 7×24-hour online monitoring of gas leakage and early warning.

[0031] In the embodiments of the present invention, it is preferable to use a dual-spectrum thermal imaging device to monitor temperature anomalies and ignition points in the detected area. All objects in nature, as long as their temperature is higher than absolute zero (-273.15 °C), can continuously radiate electromagnetic waves to the outside world. Infrared radiation is one of the most widespread electromagnetic wave radiations existing in nature. It is based on the random motion of the molecules and atoms of any object in a conventional environment, and continuously radiates thermal infrared energy.

[0032] The dual-spectrum thermal imaging device mainly collects infrared light in the far-infrared band (8μm - 14μm), and uses the radiation difference between the target and the background or between different parts of the target to form an infrared radiation characteristic image. The dual-spectrum thermal imaging device obtains the amount of heat radiated externally between the target and the background or between different parts of the target, and converts the surface heat of the radiation source through a thermal radiation algorithm to output an image corresponding to the temperature value (gray value). As shown in the following figure: The infrared light in the external far-infrared band is amplified, shaped, and converted from analog to digital by a UFPA (Uncooled Infrared Focal Plane Arrays), and finally displayed as a two-dimensional digital image. In the FPGA module, the image is processed, such as non-uniformity correction, AGC, DDE, 3D noise reduction, etc., and then transmitted to the DSP application layer for output to generate a video stream with stable, smooth, and high signal-to-noise ratio.

[0033] Thermal imaging is less affected by environmental factors and is detected in a non-contact manner, suitable for all-weather, long-distance, and wide-range real-time detection. The dual-spectrum thermal imaging device provides a real-time preview screen, observes and monitors the temperature distribution in the scene, and provides the temperature information of each pixel point in the screen. For key fire prevention targets, it provides various temperature measurement modes such as points, lines, and frames. By setting the temperature alarm threshold, it can measure the temperature gray value of the objects in the scene in real time, and alarm when the temperature of the target changes abnormally, so as to quickly and effectively discover potential fire hazards and prevent accidental fires.

[0034] In the embodiments of the present invention, multiple dual-spectrum thermal imaging devices are installed to cover and monitor the areas that may generate fire sources corresponding to the required monitoring. The relevant functions of the cameras are configured to ensure that an alarm is triggered when the temperature of the target changes abnormally, so as to quickly and effectively discover potential fire hazards and prevent problems before they occur. When an abnormal high-temperature alarm appears, it is detected and reported immediately, and then the administrator can manage the cameras through the platform and handle potential safety hazards through the alarm information.

[0035] When further using traditional thermal imaging devices for temperature measurement and fire prevention applications in some scenarios, false alarms may occur due to some on-site environmental factors. For example, in outdoor application scenarios, false alarms caused by high-temperature solar reflection are common; in indoor application scenarios, false alarms caused by high-temperature parts of engineering vehicles are common. The dual-spectrum thermal imaging device in the embodiments of the present invention is further equipped with an on-board intelligent false alarm filtering algorithm. By configuring and enabling the intelligent filtering algorithm, the generation of such false alarms can be effectively reduced.

[0036] A detection point positioning module, configured to set a detection device in a detected area according to a preset detection point positioning algorithm. The preset detection point positioning algorithm specifically includes: obtaining a point cloud image of the detected area, using a method combining Cartesian grid and snake algorithm for the deployment of the detection device, and obtaining the coordinates of the detection device. Among them, when the detection device uses a sensor detection device, the detection point positioning module sets the sensor detection device at a preset coordinate.

[0037] The Cartesian grid is a method of dividing a monitoring area into regular grids. The snake algorithm is a heuristic algorithm used to solve the coverage problem of detection devices, that is, how to effectively arrange detection device nodes to cover the entire detected area. The snake algorithm solves the coverage problem by simulating the movement of a snake within the detected area. Figure 2 is a flowchart of the preset detection point positioning algorithm in the embodiments of the present invention. According to Figure 2 it can be known that the steps of using the Cartesian grid and snake algorithm for the coverage of detection devices include:

[0038] S1. Randomly deploy a certain number of detection device nodes within the detected area;

[0039] S2. Divide the detected area into regular Cartesian grids, and the size of each grid is equal to or larger than the sensing radius of the detection device;

[0040] S3. For each grid, calculate the degree of coverage of the grid by the detection device, that is, the proportion of the covered area within the grid;

[0041] S4. According to the grid coverage rate, move the detection device along a snake-shaped path. The snake-shaped path can be a straight line, a curve, or any shape as long as it can effectively cover the uncovered grids;

[0042] S5. During the movement, continuously adjust the position of the detection device to improve the coverage rate of the entire monitoring area;

[0043] S6. When all grids within the monitoring area are covered or reach a certain coverage rate, the algorithm ends and outputs the positioning information of the detection device.

[0044] Through the above steps, the coverage of the detection device can be achieved using the Cartesian grid and the snake algorithm. The Cartesian grid divides the monitoring area into regular grids, which can more accurately calculate the grid coverage rate. The snake algorithm optimizes the coverage effect by moving the detection device nodes. This combination can improve the coverage rate and efficiency of the detection device network and achieve effective coverage of the detection device.

[0045] In the above detection device coverage using the Cartesian grid and the snake algorithm, S1 generates the nodes of the detection device randomly as the initial population of the snake algorithm. Such positions are relatively random, which may lead to poor convergence of the algorithm. Therefore, the embodiment of the present invention uses the method of chaotic mapping initialization to generate the initial positions. Using the chaotic sequence for operations such as population initialization, selection, crossover, and mutation will affect the entire process of the algorithm, and often can achieve better results than pseudo-random numbers.

[0046] The coordinate sending module is used to send the coordinates of the detected gas leakage points, temperature anomaly points, and ignition points to the data processing subsystem 11.

[0047] The visual module is used to display the images obtained by the visual detection device, and when gas leakage, temperature anomaly, and ignition points are detected, the images are magnified.

[0048] The data processing subsystem 11 is used to monitor the gas leakage in the detected area based on the first monitoring data according to the preset gas leakage monitoring method; monitor the temperature anomaly in the detected area based on the second monitoring data according to the preset temperature anomaly algorithm; locate the ignition points in the detected area according to the third monitoring data, generate the fire equipment start parameters, and send them to the fire drive processor. Among them, if gas leakage or temperature anomaly occurs in the detected area, it is processed through the preset emergency response strategy to generate the fire equipment preparation parameters and send them to the fire drive processor; the data processing subsystem 11 specifically includes:

[0049] The gas leakage processing module is used to analyze the first monitoring data to obtain the real-time gas concentration, compare the gas concentration with the preset gas concentration warning value and gas concentration linkage value, and process the comparison result through the preset emergency response strategy, where the gas concentration warning value is less than the gas concentration linkage value;

[0050] The temperature anomaly processing module is used to generate a temperature anomaly event tree report for the second monitoring data according to the temperature anomaly algorithm, compare the comparison results with the preset temperature anomaly warning value and temperature anomaly linkage value, and process the comparison results through the preset emergency response strategy, where the temperature anomaly warning value is greater than the temperature anomaly linkage value; because the gas releases heat after being compressed, and the compressed gas absorbs heat after being released. When the compressed gas is released, it absorbs a large amount of heat from its surroundings, causing the air temperature at the leakage point to drop rapidly below 0 degrees Celsius. Therefore, the temperature anomaly warning value is set to be greater than the temperature anomaly linkage value.

[0051] The ignition point positioning module is used to analyze the third monitoring data, obtain the ignition point positioning according to the preset ignition point positioning algorithm, and generate fire-fighting equipment startup parameters according to the ignition point positioning.

[0052] In the embodiment of the present invention, the emergency response strategy preset by the data processing subsystem specifically includes:

[0053] If the gas concentration is greater than the gas concentration warning value and less than or equal to the gas concentration linkage value, a gas leakage warning is issued. The gas leakage point is obtained according to the first monitoring data to generate fire-fighting equipment preparation parameters, and after driving the fire-fighting equipment to be in a preparation state, a secondary determination is performed through the warning response subsystem; if the gas concentration is greater than the gas concentration linkage value, the gas leakage point is obtained according to the first monitoring data, the fire-fighting equipment startup parameters are generated according to the gas leakage point, and the fire-fighting equipment startup parameters are sent to the fire-fighting drive processor.

[0054] If the temperature anomaly value is less than the temperature anomaly warning value and greater than or equal to the temperature anomaly linkage value, a temperature anomaly warning is issued. The temperature anomaly point is obtained according to the second monitoring data to generate fire-fighting equipment preparation parameters, and after driving the fire-fighting equipment to be in a preparation state, a secondary determination is performed through the warning response subsystem; if the temperature anomaly value is less than the temperature anomaly linkage value, the temperature anomaly point is obtained according to the second monitoring data, the fire-fighting equipment startup parameters are generated according to the temperature anomaly point, and the fire-fighting equipment startup parameters are sent to the fire-fighting drive processor.

[0055] The ignition point positioning module is specifically used for:

[0056] Determine the first highest smoke point and the first lowest smoke point in the first smoke image, and determine the second highest smoke point and the second lowest smoke point in the second smoke image;

[0057] According to the first highest smoke point, with the position of the infrared detection device at the first observation position point as the ray endpoint, determine the first pitch angle and the first horizontal angle of the infrared detection device at the first observation position point. With the acquisition direction of the infrared detection device at the first observation position point at the first pitch angle and the first horizontal angle as the ray direction, determine the first ray;

[0058] Based on the highest point of the first smoke, with the infrared detection device at the second observation position point as the ray endpoint, determine the second pitch angle and the second horizontal angle of the infrared detection device at the second observation position point. With the acquisition direction of the infrared detection device at the second observation position point at the second pitch angle and the second horizontal angle as the ray direction, determine the second ray;

[0059] Based on the lowest point of the first smoke, with the position point of the infrared detection device at the first observation position point as the ray endpoint, determine the third pitch angle and the third horizontal angle of the infrared detection device at the first observation position point. With the acquisition direction of the infrared detection device at the first observation position point at the third pitch angle and the third horizontal angle as the ray direction, determine the third ray;

[0060] Based on the lowest point of the second smoke, with the position point of the infrared detection device at the first observation position point as the ray endpoint, determine the fourth pitch angle and the fourth horizontal angle of the infrared detection device at the first observation position point. With the acquisition direction of the infrared detection device at the first observation position point at the fourth pitch angle and the fourth horizontal angle as the ray direction, determine the third ray;

[0061] Determine the intersection point of the first ray and the second ray as the first intersection point, and determine the intersection point of the third ray and the fourth ray as the second intersection point;

[0062] Based on the first intersection point and the second intersection point, determine the target line, and based on the target line and the digital elevation model, determine the location of the ignition point.

[0063] The data processing subsystem 11 in the embodiment of the present invention generates fire-fighting equipment preparation parameters, specifically including:

[0064] Generate the fire-fighting pipeline pressure value, which is the pressure value when the fire-fighting pipeline can normally spray the fire-fighting medium through the fire-fighting cannon;

[0065] Generate fire-fighting cannon preparation parameters, specifically including:

[0066] Obtain the detection device that detects gas leakage or temperature abnormality, and obtain the monitoring range of the detection device;

[0067] Perform coordinate conversion on the monitoring range of the detection device, convert the monitoring range and the fire-fighting cannon muzzle to the same coordinate system, and obtain the preparation coordinate range;

[0068] Obtain the rotation range of the fire-fighting cannon muzzle according to the preparation coordinate range.

[0069] According to the above emergency response strategy, when the gas concentration is greater than the gas concentration warning value and less than or equal to the gas concentration linkage value, or when the abnormal temperature value is greater than the abnormal temperature warning value and less than or equal to the abnormal temperature linkage value, the fire monitor preparation parameters are generated. The fire-fighting equipment reaches the pressure of the normal working state of the fire pipeline through the fire pump according to the fire monitor preparation parameters, and rotates the fire monitor nozzle to aim at a certain range of the detection device that detects gas leakage or abnormal temperature. This range can be preset in advance because it is an approximate range rather than a specific point. That is to say, when the gas concentration and the abnormal temperature point reach the warning value but do not reach the linkage value, only the fire-fighting equipment is put into the preparation state, and the next operation is carried out after the secondary confirmation on the site, ensuring that the pressure in the fire pipeline can drive the fire monitor to spray the medium at any time, thus saving the time for the fire pump to reach the normal working pressure from the fire pipeline to the fire monitor nozzle. The existing technology stipulates that this time is less than 1-2 minutes. However, for various scenarios of flammable and explosive gases, if the leakage is not handled in time after leakage, the losses are immeasurable and the risks are uncontrollable. Therefore, through the emergency response strategy, the fire-fighting equipment is put into the preparation state in advance, thus avoiding such situations and winning 3-5 minutes of golden time for fire rescue. Moreover, since the gas leakage or abnormal temperature has not reached the linkage value, in this case, only the fire monitor nozzle needs to be aimed at the approximate range of the gas leakage point or the abnormal temperature point, because the rotation of the fire monitor nozzle is extremely fast, which can be calculated in seconds. However, aiming the fire monitor nozzle at a specific point requires precise calculation. Therefore, after the secondary confirmation and evaluating the necessity of starting the fire-fighting equipment, we then carry out precise calculation to aim the fire monitor nozzle at the precise leakage point or abnormal point.

[0070] The data processing subsystem 11 generates the fire-fighting equipment startup parameters, specifically including:

[0071] Generating the fire pipeline pressure value and the fire monitor startup parameters. Generating the fire monitor startup parameters specifically includes:

[0072] Obtaining the inlet pressure value of the fire monitor according to the fire pipeline pressure value, and obtaining the outlet velocity of the fire monitor nozzle according to the inlet pressure value;

[0073] Generating the fire monitor startup pitch angle and the fire monitor startup horizontal angle according to the outlet velocity and the jet trajectory model, where the fire monitor startup pitch angle and the fire monitor startup horizontal angle make the fire monitor nozzle aim at the target point, and the target point includes: the gas leakage point, the abnormal temperature point, and the ignition point.

[0074] The difference between the start parameters and standby parameters of fire-fighting equipment is that the start parameters of fire-fighting equipment are generated when the gas leakage value or temperature anomaly value is greater than the linkage value. Here, the linkage value is greater than the above warning value. That is, the warning value is a critical value of possible dangerous situations set according to the characteristics of various gases, while the linkage value is a value of dangerous situations that have occurred set according to the characteristics of various gases. Therefore, the setting of the warning value is relatively loose compared to the setting of the linkage value. That is, the gas concentration warning value is less than the gas concentration linkage value, and the temperature anomaly warning value is greater than the temperature anomaly linkage value. When the gas concentration value is greater than the gas concentration linkage value or the temperature anomaly value is less than the temperature anomaly linkage value, in more serious cases, such as when a fire point is detected, it indicates that a dangerous situation has occurred, and the fire-fighting equipment must be driven to work immediately. Therefore, at this time, the muzzle of the fire cannon needs to be accurately calculated and aimed at the dangerous point, rather than just a range. For example: during low-temperature changes, the detected ambient value of the manifold flange is 38°C, the operating medium is ethylene liquid phase at -103°C, the surface working temperature of the operating low-temperature medium is 24°C, and the temperature within the temperature scanning period is -2°C... -17°C, etc. The first-level warning value for the summer operating condition is set to 0°C, the second-level linkage value is set to -13°C, etc. Because the ambient temperature around the complete leakage of the medium can theoretically reach -100°C, by setting the linkage program of the fire-fighting facilities, the fire-fighting medium in the long-distance fire pipeline can quickly reach the working pressure in advance, saving the golden rescue time.

[0075] When the nozzle of the fire cannon sprays water into the air, it performs a projectile motion, and its trajectory is generally parabolic. Usually, the jet microelement is taken as the analysis object. The microelement is a unit mass of liquid droplets or water micro-masses, which follows Newton's second law during air movement, considering the influence of gravity and air resistance, and ignoring the droplet buoyancy and Coriolis force. Min et al. analyzed the influence of two air resistance models on the trajectory and range, and pointed out that different resistance modes have little influence on the range, but will change the jet trajectory. This application analyzes the jet equation under the condition of only considering air resistance, and the air resistance model is as follows:

[0076] F t =-kv;

[0077] From the perspective of particle kinematics, the force situation of the jet microelement is analyzed in the embodiments of the present invention. Figure 3 This is the schematic diagram of the force on the jet microelement in the embodiments of the present invention. It simulates the jet of the fire cannon ejected from the nozzle. Suppose the height of the fire cannon outlet from the ground is h, the elevation angle of the fire cannon is α, the outlet velocity of the fire cannon nozzle is v0, the velocity of the jet microelement is v, the horizontal component of the velocity is v x , the included angle is θ, the vertical component is v y , the influence of the gravity is mg, and the influence of the air resistance is F t, in the direction opposite to the jet movement direction, establish the differential equations of force in the x-direction and y-direction, as shown in the following formula:

[0078]

[0079] where k is the air resistance coefficient, v x = vcosθ, v y = vsinθ,

[0080] Let After simplification, integrate the above formula. According to the initial conditions v x0 = v0cosα, v y0 = v0sinα, and then convert the velocity into the derivative with respect to distance, and then integrate in combination with the initial conditions x0 = 0, y0 = h to obtain:

[0081]

[0082] Eliminate the above time t, and substitute v x0 = v0cosα, v y0 = v0sinα, and the jet trajectory model can be obtained as follows:

[0083]

[0084] According to the above jet model trajectory, combined with the known outlet velocity v0 of the fire cannon nozzle, and the known coordinates of the gas leakage point, temperature anomaly point and ignition point, that is, (x, y) is known, the elevation angle α of the fire cannon can be obtained; the calculation of the horizontal angle β of the fire cannon is relatively simple, just make the muzzle coordinates and the gas leakage point, temperature anomaly point and ignition point in a two-dimensional plane, specifically: take the gas leakage point, temperature anomaly point and ignition point as the origin, take the horizontal direction in the direction of the fire cannon as the x-axis, and take the direction perpendicular to the x-axis upward as the y-axis to establish a two-dimensional coordinate system, and the angle rotated by the muzzle direction to be in the same two-dimensional coordinate system as the gas leakage point, temperature anomaly point and ignition point is the horizontal angle β of the fire cannon.

[0085] The early warning response subsystem 12 is used to make a secondary determination of the occurrence of gas leakage or temperature anomaly in the detected area; the early warning response subsystem 12 is specifically used for:

[0086] When the gas concentration is greater than the gas concentration warning value and less than or equal to the gas concentration linkage value, a secondary determination is made on the gas leakage point. When the temperature anomaly value is greater than the temperature anomaly warning value and less than or equal to the temperature anomaly linkage value, a secondary determination is made on the temperature anomaly point. If the danger can be handled by technicians after the determination, it will be handled by technicians. If it cannot be handled by technicians, the fire-fighting equipment start parameters will be generated through the data processing subsystem, and the fire-fighting equipment will be driven to handle through the fire-fighting drive processor.

[0087] The fire-fighting drive processor 13 is used to drive the fire-fighting equipment to be in a standby state according to the fire-fighting equipment preparation parameters and start the fire-fighting equipment to be in a working state according to the fire-fighting equipment start parameters;

[0088] The fire-fighting equipment 14 is used to be in a standby state or a working state under the drive of the fire-fighting drive processor. The fire-fighting equipment 14 specifically includes: a fire pump house, a fire pipeline, and a fire cannon. The fire pump house is connected to the fire pipeline and is used to drive the fire pipeline to work; the fire pipeline is connected to the fire cannon and is used to provide fire-fighting medium for the fire cannon. The fire cannon is used to align the gas leakage point, the temperature anomaly point, and the ignition point by adjusting the horizontal angle and elevation angle of the muzzle.

[0089] Lianyungang No. 6 liquid bulk cargo berth is a newly built liquefied petroleum gas (LPG) terminal. The production status is as follows: it is set that when the electric start of the fire alarm water cannon to control the action response time of the fire cannon is not greater than 3 seconds, and the electric start of the dry powder cannon to control the action response time of the fire cannon is not greater than 5 seconds. Usually, the pipeline pressure is maintained: when the pipeline pressure is lower than 0.8 MPa, the fire-fighting pressure stabilizing pump A (or stabilizing pump B) is started, and the two stabilizing pumps are used as backups for each other and operate alternately. When the fire pipeline pressure is higher than 1.0 MPa, the pressure stabilizing fire pump group stops automatically. In the fire-fighting response stage, the design pressure is 1.72 MPa. When the fire pipeline pressure continues to drop: when the pipeline pressure is lower than 1.3 MPa, an alarm signal is sent, and a diesel engine-driven fire pump group A is started first. If the pipeline pressure continues to decrease and the pressure is lower than 1.2 MPa, the second diesel engine fire pump group B or C is started. The start interval between the two fire pump groups shall not be greater than 10 seconds.

[0090] In the embodiment of the present invention, the detection device issues a warning to the abnormal signal source. After the on-site personnel make a secondary confirmation, the fire cannon control system is driven to automatically adjust the horizontal and elevation angles so that the muzzle is aligned with the potential hazard point. While detecting the alarm of the abnormal signal source, the rear fire-fighting device is linked to make the medium in the fire pipeline reach the working pressure, thereby reducing the emergency response time of the equipment. Further, the embodiment of the present invention can be divided into manual, semi-linkage, and automatic modes according to the abnormal signal setting, and finally, it is launched through personnel confirmation.

[0091] By adopting the embodiments of the present invention, the detection subsystem comprehensively monitors gas leakage, temperature anomalies, and ignition points by using a preset detection point positioning algorithm. The data processing subsystem generates fire-fighting equipment preparation parameters for gas leakage and temperature anomalies. After secondary determination by the early warning response subsystem, subsequent operations are carried out. The ignition point is accurately located, fire-fighting equipment start parameters are generated, and the fire-fighting equipment is driven to aim at the ignition point. This application adopts two different schemes when the gas leakage and temperature anomalies reach the warning value and the linkage value, and realizes the most accurate and rapid prevention of dangerous situations on the basis of the least calculation by the data processing subsystem. The embodiments of the present invention provide a platform for intelligent development on the basis of the traditional fire-fighting system; shorten the emergency response time, dispose of fires early, reduce the expansion of fires, maximize the protection of property safety; improve the efficiency of fire-fighting emergency disposal; realize the intelligence of fire-fighting scene disposal; realize unmanned disposal at the fire-fighting site, ensure personnel safety; intelligent and accurate positioning saves fire extinguishing agents and reduces operating costs.

[0092] Method Embodiment

[0093] The embodiments of the present invention provide a visible intelligent fire detection, early warning and linkage method. Figure 4 It is a flowchart of the visible intelligent fire detection, early warning and linkage method of the embodiments of the present invention. According to Figure 4 As shown, the visible intelligent fire detection, early warning and linkage method of the embodiments of the present invention specifically includes:

[0094] S41. The detection subsystem sets the detection device in the detected area by using a preset detection point positioning algorithm. The detection device obtains the first monitoring data by monitoring air leakage in the detected area, obtains the second monitoring data by monitoring the temperature difference, and obtains the third monitoring data by monitoring the fire location.

[0095] S42. The data processing subsystem detects and warns of gas leakage in the detected area according to the first monitoring data; detects and warns of temperature anomalies in the detected area according to the second monitoring data; locates the ignition point in the detected area according to the third monitoring data, generates fire-fighting equipment start parameters, and sends them to the fire-fighting drive processor. Among them, if gas leakage or temperature anomaly occurs in the detected area, it is processed through a preset emergency response strategy, fire-fighting equipment preparation parameters are generated, and sent to the fire-fighting drive processor.

[0096] S43. The early warning response subsystem makes a secondary determination on the occurrence of gas leakage or temperature anomaly in the detected area.

[0097] S44. The fire-fighting drive processor drives the fire-fighting equipment to be in a standby state according to the fire-fighting equipment preparation parameters, and starts the fire-fighting equipment to be in a working state according to the fire-fighting equipment start parameters.

[0098] S45 is in a standby state or a working state under the drive of a fire-fighting device by a fire-fighting drive processor.

[0099] The embodiment of the present invention is a method embodiment corresponding to the above-mentioned visual intelligent fire detection and early warning linkage system, and reference can be specifically made to the above-mentioned visual intelligent fire detection and early warning linkage system, which will not be elaborated here.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A visual intelligent fire detection, early warning and linkage system, characterized in that, Including: A detection subsystem, a data processing subsystem, an early warning response subsystem, a fire fighting drive processing subsystem, and fire fighting equipment; The detection subsystem is configured to set a detection device in a detected area through a preset detection point positioning algorithm. The detection device obtains first monitoring data by monitoring air leakage in the detected area, obtains second monitoring data by monitoring temperature difference, and obtains third monitoring data by positioning a fire; The data processing subsystem is configured to detect and give an early warning of gas leakage in the detected area according to the first monitoring data; Detect and give an early warning of abnormal temperature in the detected area according to the second monitoring data; Locate the ignition point in the detected area according to the third monitoring data, generate fire fighting equipment start parameters, and send them to a fire fighting drive processor. Wherein, if gas leakage or abnormal temperature occurs in the detected area, it is processed through a preset emergency response strategy to generate fire fighting equipment preparation parameters and send them to the fire fighting drive processor; The early warning response subsystem is configured to make a secondary determination on gas leakage or abnormal temperature in the detected area; The fire fighting drive processor is configured to drive the fire fighting equipment to be in a standby state according to the fire fighting equipment preparation parameters, and start the fire fighting equipment to be in a working state according to the fire fighting equipment start parameters; The fire fighting equipment is configured to be in a standby state or a working state under the drive of the fire fighting drive processor; The data processing subsystem generates fire fighting equipment preparation parameters, specifically including: Generating a fire fighting pipeline pressure value, which is the pressure value when the fire fighting pipeline can normally spray fire fighting medium through a fire fighting cannon; Generating fire fighting cannon preparation parameters, specifically including: Obtaining a detection device that detects gas leakage or abnormal temperature, and obtaining the monitoring range of the detection device; Performing coordinate conversion on the monitoring range of the detection device, converting the monitoring range and the fire fighting cannon muzzle to the same coordinate system, and obtaining a standby coordinate range; Obtaining the rotation range of the fire fighting cannon muzzle according to the standby coordinate range; The data processing subsystem generates fire fighting equipment start parameters, specifically including: Generating a fire fighting pipeline pressure value and fire fighting cannon start parameters. The generating of the fire fighting cannon start parameters specifically includes: Obtaining the inlet pressure value of the fire fighting cannon according to the fire fighting pipeline pressure value, and obtaining the outlet speed of the nozzle of the fire fighting cannon according to the inlet pressure value; Generating a fire fighting cannon start pitch angle and a fire fighting cannon start horizontal angle according to the outlet speed and a jet trajectory model. The fire fighting cannon start pitch angle and the fire fighting cannon start horizontal angle are such that the fire fighting cannon muzzle is aimed at a target point, and the target point includes: a gas leakage point, an abnormal temperature point, and a fire point.

2. The system according to claim 1, characterized in that The detection subsystem specifically includes: a detection device, a detection point positioning module, a coordinate sending module, and a visual module; The detection device uses a sensor detection device or a visual detection device to monitor air leakage, temperature difference, and fire location in the detection area. The sensor detection device includes: a toxic and combustible gas monitoring device and a temperature sensor device. The toxic and combustible gas monitoring device monitors the leakage of toxic gases and issues an alarm. The temperature sensor device monitors the temperature difference and issues an alarm in case of abnormal temperature. The toxic and combustible gas monitoring device and the temperature sensor device are installed at preset positions. The visual detection device includes: N hyperspectral Fourier gas telemetry devices and M dual-spectrum thermal imaging devices. The hyperspectral Fourier gas telemetry device is specifically used for: obtaining a hyperspectral image of the detection area and using Fourier transform infrared spectroscopy to obtain the gas types and gas concentrations in the detection area as the first monitoring data. The dual-spectrum thermal imaging device is used to obtain an infrared radiation characteristic image and obtain the temperature value through a thermal radiation algorithm as the second monitoring data. Obtaining the image collected by the detection device at the first observation position point as the first smoke image, the image collected by the detection device at the second observation position point as the second smoke image, and using the first smoke image and the second smoke image as the third monitoring data. The detection point positioning module is used to set the detection device in the detection area according to a preset detection point positioning algorithm. The preset detection point positioning algorithm specifically includes: obtaining a point cloud image of the detection area, using a method combining Cartesian grid and snake algorithm for the deployment of the detection device, and obtaining the coordinates of the detection device. Among them, when the detection device uses a sensor detection device, the detection point positioning module sets the sensor detection device at the preset coordinates. The coordinate sending module is used to send the coordinates of the detected gas leakage point, temperature anomaly point, and ignition point to the data processing module. The visual module is used to display the images obtained by the visual detection device and magnify the images in case of detected gas leakage, temperature anomaly, and ignition point.

3. The system according to claim 1, wherein The data processing subsystem specifically includes: The gas leakage processing module is used to analyze the first monitoring data to obtain the real-time gas concentration, compare the gas concentration with a preset gas concentration warning value and a gas concentration linkage value, and process the comparison result through the preset emergency response strategy. Among them, the gas concentration warning value is less than the gas concentration linkage value. The temperature anomaly processing module is used to form a temperature anomaly event tree report for the second monitoring data according to the temperature anomaly algorithm, compare the comparison result with a preset temperature anomaly warning value and a temperature anomaly linkage value, and process the comparison result through the preset emergency response strategy. Among them, the temperature anomaly warning value is greater than the gas concentration linkage value. The ignition point positioning module is used to analyze the third monitoring data, obtain the ignition point positioning according to a preset ignition point positioning algorithm, and generate fire-fighting equipment startup parameters according to the ignition point positioning.

4. The system according to claim 3, wherein The preset emergency response strategy of the data processing subsystem specifically includes: If the gas concentration is greater than the gas concentration warning value and less than or equal to the gas concentration linkage value, a gas leakage warning is issued. The gas leakage point is obtained according to the first monitoring data to generate fire-fighting equipment preparation parameters, driving the fire-fighting equipment to be in a preparation state, and then a secondary determination is made through the warning response subsystem. If the gas concentration is greater than the gas concentration linkage value, the gas leakage point is obtained according to the first monitoring data, the fire-fighting equipment start parameters are generated according to the gas leakage point, and the fire-fighting equipment start parameters are sent to the fire drive processor. If the temperature anomaly value is less than the temperature anomaly warning value and greater than or equal to the temperature anomaly linkage value, a temperature anomaly warning is issued. The temperature anomaly point is obtained according to the second monitoring data to generate fire-fighting equipment preparation parameters, driving the fire-fighting equipment to be in a preparation state, and then a secondary determination is made through the warning response subsystem. If the temperature anomaly value is less than the temperature anomaly linkage value, the temperature anomaly point is obtained according to the second monitoring data, the fire-fighting equipment start parameters are generated according to the temperature anomaly point, and the fire-fighting equipment start parameters are sent to the fire drive processor.

5. The system according to claim 2, wherein The ignition point positioning module is specifically used for: Determine the highest point of the first smoke and the lowest point of the first smoke in the first smoke image, and determine the highest point of the second smoke and the lowest point of the second smoke in the second smoke image; Based on the highest point of the first smoke, with the position of the infrared detection device at the first observation position point as the ray endpoint, determine the first pitch angle and the first horizontal angle of the infrared detection device at the first observation position point. With the acquisition direction of the infrared detection device at the first observation position point at the first pitch angle and the first horizontal angle as the ray direction, determine the first ray; Based on the highest point of the first smoke, with the position of the infrared detection device at the second observation position point as the ray endpoint, determine the second pitch angle and the second horizontal angle of the infrared detection device at the second observation position point. With the acquisition direction of the infrared detection device at the second observation position point at the second pitch angle and the second horizontal angle as the ray direction, determine the second ray; Based on the lowest point of the first smoke, with the position point of the infrared detection device at the first observation position point as the ray endpoint, determine the third pitch angle and the third horizontal angle of the infrared detection device at the first observation position point. With the acquisition direction of the infrared detection device at the first observation position point at the third pitch angle and the third horizontal angle as the ray direction, determine the third ray; Based on the lowest point of the second smoke, with the position point of the infrared detection device at the first observation position point as the ray endpoint, determine the fourth pitch angle and the fourth horizontal angle of the infrared detection device at the first observation position point. With the acquisition direction of the infrared detection device at the first observation position point at the fourth pitch angle and the fourth horizontal angle as the ray direction, determine the fourth ray; Determine the intersection point of the first ray and the second ray as the first intersection point, and determine the intersection point of the third ray and the fourth ray as the second intersection point; Determine the target line based on the first intersection point and the second intersection point, and determine the location of the ignition point based on the target line and the digital elevation model.

6. The system according to claim 1, wherein The fire-fighting equipment includes: a fire pump house, fire pipes, and a fire cannon. The pump house is connected to the fire pipes and is used to drive the fire pipes to work; the fire pipes are connected to the fire cannon and are used to provide fire-fighting medium for the fire cannon, and the fire cannon is used to align the gas leakage point, temperature anomaly point, and ignition point by adjusting the horizontal angle and elevation angle of the muzzle.

7. The system according to claim 3, wherein, The early warning response subsystem is specifically used for: When the gas concentration is greater than the gas concentration warning value and less than or equal to the gas concentration linkage value, conduct a secondary determination of the gas leakage point. When the temperature anomaly value is less than the temperature anomaly warning value and greater than or equal to the temperature anomaly linkage value, conduct a secondary determination of the temperature anomaly point. If the danger can be handled by technicians after the determination, the technicians will handle it. If it cannot be handled by technicians, the data processing subsystem will generate the start-up parameters of the fire-fighting equipment.

8. A visual intelligent fire detection, early warning and linkage method, characterized in that Including: Set the detection device in the detected area through the detection subsystem using the preset detection point positioning algorithm. The detection device obtains the first monitoring data by monitoring air leakage in the detected area, obtains the second monitoring data by monitoring the temperature difference, and obtains the third monitoring data by monitoring the fire location; The data processing subsystem detects and warns of gas leakage in the detected area according to the first monitoring data; Detect and warn of temperature anomalies in the detected area according to the second monitoring data; Locate the ignition point in the detected area according to the third monitoring data, generate the start-up parameters of the fire-fighting equipment, and send them to the fire-fighting drive processor. Among them, if gas leakage or temperature anomaly occurs in the detected area, handle it through the preset emergency response strategy, generate the standby parameters of the fire-fighting equipment, and send them to the fire-fighting drive processor; The early warning response subsystem conducts a secondary determination of gas leakage or temperature anomaly in the detected area; The fire-fighting drive processor drives the fire-fighting equipment to be in a standby state according to the standby parameters of the fire-fighting equipment, and starts the fire-fighting equipment to be in a working state according to the start-up parameters of the fire-fighting equipment; The fire-fighting equipment is in a standby state or a working state under the drive of the fire-fighting drive processor; The data processing subsystem generates the standby parameters of the fire-fighting equipment, specifically including: Generate the fire pipe pressure value, which is the pressure value that enables the fire pipe to spray the fire-fighting medium normally through the fire cannon; Generate the standby parameters of the fire cannon, specifically including: Obtain the detection device that detects gas leakage or temperature anomaly, and obtain the monitoring range of the detection device; Convert the monitoring range of the detection device, convert the monitoring range and the fire cannon muzzle to the same coordinate system, and obtain the standby coordinate range; Obtain the rotation range of the fire cannon muzzle according to the standby coordinate range; The data processing subsystem generates the start-up parameters of the fire-fighting equipment, specifically including: Generate the fire pipe pressure value and the start-up parameters of the fire cannon. The generation of the start-up parameters of the fire cannon specifically includes: Obtain the inlet pressure value of the fire monitor according to the pressure value of the fire pipeline, and obtain the outlet velocity of the fire monitor nozzle according to the inlet pressure value; Generate the starting pitch angle of the fire monitor and the starting horizontal angle of the fire monitor according to the outlet velocity and the jet trajectory model, wherein the starting pitch angle of the fire monitor and the starting horizontal angle of the fire monitor make the fire monitor muzzle aim at the target point, and the target point includes: gas leakage point, temperature anomaly point and ignition point.

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