Multi-stage misjudgment-preventing fire source positioning system and method for fire water monitor

Abstract

According to the multistage misjudgment prevention fire source positioning system and method for the fire water monitor, the system at least comprises a first-stage omnidirectional fire behavior detection and determination unit, a second-stage unidirectional fire behavior determination unit, a third-stage unidirectional fire behavior determination unit and a fourth-stage array type sensor fire behavior determination unit; according to the method disclosed by the invention, the step-by-step detection of the four stages of units is reasonably sorted and combined, and the mapping relationship between the preset flame induction parameters and the induction distance is sorted out in advance and stored in a system as a basis for the detection and comparison of the array type sensors, so that the accuracy of the detection and comparison of the array type sensors is improved. And determining whether the fire source is an ignition point. According to the scheme, an existing mode of judging the fire behavior through an infrared photosensitive area is changed, finally, the fire source is accurately determined in the mode that the flame characteristic parameters are detected through the array type sensor to point the ignition point, and due to the fact that the ignition point is greatly different from the surrounding environment or common interference factors, accurate distinguishing can be achieved, and the accuracy of the fire source is improved. The misjudgment rate of the water cannon can be further reduced, and misjudgment loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fire water monitors, and in particular to a multi-stage anti-misjudgment fire source positioning system and method for fire water monitors. Background Art

[0002] Fire monitors are highly efficient, high-flow, long-range firefighting devices. Consisting of a bracket, barrel, slewing mechanism, and control system, they extinguish fires by spraying high-pressure water streams. With a range of several hundred meters, high flow rates, and wide coverage, they are suitable for large spaces such as warehouses, gymnasiums, and plazas. Some intelligent models feature flame detection and automatic positioning, making them a crucial component of modern firefighting systems.

[0003] As a core equipment of modern firefighting systems, the accuracy of fire identification by fire monitors directly affects the effectiveness of firefighting and the normal production and operation activities of users. Once a false fire is misjudged as a real fire, water spraying will be activated, causing significant losses to the user. In existing technologies, fire identification and positioning of fire monitors generally rely on infrared sensors to sense and detect the location of the fire source. This is easily affected by environmental factors such as strong light areas and dust, resulting in misjudgment. How to further reduce the misjudgment rate is a technical problem facing various manufacturers and technicians in the firefighting field. Further improvement and optimization are needed to avoid the trouble caused by misjudgment as much as possible. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a fire water monitor multi-level anti-misjudgment fire source positioning system and method.

[0005] The technical solution of the present invention is: a fire monitor multi-stage anti-misjudgment fire source positioning system, which is characterized in that: the system at least includes First-level all-round detection fire determination unit It includes various types of fire detection alarm equipment or sensors, which are used to preliminarily determine the area of ​​the fire through daily coverage sensing and give a first-level signal; the sensor here is the water cannon's own sensor for daily all-round detection, generally a UV sensor; it can also be the alarm signal generated by other fire detection equipment other than the water cannon transmitted and borrowed.

[0006] Secondary one-way fire determination unit It includes a secondary flame sensor, a water cannon horizontal swing unit and its horizontal swing angle sensor; after the primary signal is generated, the water cannon is horizontally swung to make the secondary flame sensor scan horizontally and determine the horizontal angle of the fire source while giving a secondary signal; Level 3 one-way fire determination unit; It includes a three-stage flame sensor, a water monitor vertical swing unit and a vertical swing angle sensor; after the secondary signal is generated, the water monitor is vertically swung to make the secondary flame sensor vertically scan and determine the vertical angle of the fire source while giving a third-stage signal; Four-level array fire determination unit: It includes an array sensor, which rotates with the water monitor nozzle, and an array infrared temperature sensor. A 24*24 array can be used. The central axis of the field of view of the array sensor matches the water discharge direction of the water monitor. After the third-level signal is generated, the array sensor is used to sense the fire source to obtain flame sensing parameters, which are then compared with the preset flame sensing parameters to determine whether the fire source is the real ignition point.

[0007] Preferably, a distance calculation unit is also provided in the system.

[0008] It is used to calculate the distance between the array sensor and the fire source after the three-level signal is generated based on the initial installation height H of the water monitor and the vertical swing angle β measured after the three-level signal is generated. A corresponding unit for mapping the preset sensing parameters of the array sensor and the sensing distance is provided inside the system. The mapping relationship between the preset sensing parameters and the sensing distance is artificially established before the water cannon is used.

[0009] Preferably, the system further comprises a parameter comparison unit, which compares the measured sensing parameter with a preset sensing parameter to determine whether the measured sensing parameter represents a fire at the ignition point.

[0010] Preferably, the system also includes a central processing unit, a storage unit, and a communication unit, which are also provided in existing fire water monitors. Combined with sensors, they form a microcomputer system for autonomous judgment and autonomous action of the water monitor on site, as well as network control.

[0011] The communication unit is used to collect signals from various sensors and send them to the central processor, while transmitting the action instructions issued by the central processor to each execution unit; The storage unit is used to store programs and input and output data, and the central processing unit is used to call programs to operate on input signals and output instructions or data.

[0012] A multi-stage fire source location method for fire monitors using the above system to prevent misjudgment includes at least the following steps: a. Level 1 fire signal When the fire detection alarms or sensors of the standby water cannon detect the fire, they will give a first-level fire signal. b. Secondary fire signal After the first-level fire signal is generated, the water monitor swings horizontally to make the second-level flame sensor scan horizontally and determine the horizontal angle of the fire source, then stops swinging and gives a second-level signal at the same time; c. Level 3 fire signal After the second-level fire signal is generated, the water monitor swings horizontally to make the third-level flame sensor scan vertically and determine the vertical angle of the fire source, then stops swinging and gives a third-level signal at the same time; d. Determine the fire point The array sensor detects the flame, obtains the sensing parameters, and then determines whether the fire source is the ignition point.

[0013] Preferably, the step a further includes a preset step a0 before the step a. First, multiple sets of mapping data of preset sensing parameters and sensing distances of water monitors are manually measured multiple times. Based on these multiple sets of mapping data, a mapping relationship between the preset sensing parameters and sensing distances is established through calculation, and then the mapping relationship is stored in the system for reference and comparison; Between steps c and d, a distance calculation step c1 is also included, in which the distance between the array sensor and the fire source is calculated based on the installation height H of the water monitor and the vertical swing angle β measured after the three-level signal is generated; In the step d, the preset sensing parameters are first obtained through a mapping relationship based on the distance in step c1, and then the measured sensing parameters are compared with the preset sensing parameters to determine whether it is an ignition point.

[0014] Preferably, the step a is preceded by the following step a01: When the water cannon is produced and tested, a fire source is set up according to the location of the water cannon's spray gun head. The location of the fire source in the array sensor is calibrated as the aiming reference position in the array. Step a01 is repeated multiple times to obtain multiple sets of mapping data of water head landing point position and aiming reference position, and the mapping relationship between the two is calculated based on the mapping data. After step d, there is also step e: the water head landing point is calculated according to the water cannon height H, vertical swing angle β, and water pressure, and then the aiming reference position is determined according to the mapping relationship. Step e is followed by step f: when the position of the fire point measured in the array sensor of step d is different from the preset aiming reference position, a supplementary deviation is calculated according to the deviation value, and the horizontal swing unit and / or the vertical swing unit of the water cannon are swung and adjusted, so that the position of the fire point in the array of the array sensor is close to the preset aiming reference position, and step f is repeatedly performed to adjust the two to coincide to complete the precise adjustment; step f is repeatedly performed here because through each micro-adjustment, the software set in the system calculates the relationship between the swing angle δ of the water cannon spray gun and the displacement of the fire point in the array of the array infrared temperature sensor, which is used to guide the next micro-adjustment. In this way, the intermediate steps of multiple adjustments can appropriately increase the adjustment swing angle, improve the adjustment efficiency, and facilitate the rapid completion of precise adjustment and rapid entry into the fire extinguishing state.

[0015] After step f, there is also a precise fire extinguishing step g: the spray gun is started to spray water to extinguish the fire.

[0016] Preferably, the step g is followed by a step h: tracking the ignition point, and the step g is performed After a period of time T1, execute steps e and f again to track the fire point. During the process, as the main fire point is extinguished, the secondary fire point will rise to the main fire point. The method mentioned above can adjust the posture of the water cannon for the second time, so as to achieve tracking and aiming fire extinguishing, and further Step by step to improve the efficiency of fire extinguishing.

[0017] Preferably, after step g is performed for a period of time T2, step d is performed again to obtain the sensing parameters of the ignition point again, and compared with the sensing parameters of the ignition point obtained last time to determine whether the fire is extinguished, and determine the fire extinguishing effect within the time period T2.

[0018] The beneficial effects of the present invention are: a multi-level fire source positioning system and method for fire-fighting water cannons to prevent misjudgment, the system includes at least a first-level all-round detection fire determination unit, a second-level unidirectional fire determination unit, a third-level unidirectional fire determination unit, and a fourth-level array sensor fire determination unit, from fire awareness to gradually narrowing the fire area, until the accurate fire point is locked in the fire area through the four-level detection capability. The method of the present application rationally arranges and combines the detection of the above-mentioned four-level units step by step, and sorts out the mapping relationship between the preset sensing parameters and the sensing distance in advance, and stores it in the system as a basis for comparing the array sensor detection parameters, and thereby determines whether the fire source is the ignition point. The present application scheme changes the existing infrared photosensitive area judgment method of fire, and finally accurately determines the fire source by using the temperature to locate the ignition point. Since there is a huge gap between the ignition point and the surrounding environment or ordinary interference factors, accurate distinction can be achieved, which can further reduce the water cannon misjudgment rate and reduce misjudgment losses.

[0019] After further improvement of the positioning method of the present application, the posture of the water cannon can be further adjusted, and the water spray point of the water cannon can be precisely adjusted to correspond to the measured fire point. This is achieved by presetting the mapping relationship between the two in advance. In this way, targeted water spraying can be achieved, thereby improving the accuracy and efficiency of fire extinguishing and reducing losses.

[0020] During the fire extinguishing process, as the main fire point is extinguished, the secondary fire point will rise to the main fire point. The method of the present application can make a secondary adjustment to the posture of the water cannon to achieve tracking and aiming fire extinguishing, further improving the efficiency of fire extinguishing.

[0021] In addition, the four-stage array sensor can also judge the fire extinguishing situation. If the fire is not extinguished after the water cannon starts spraying water for a period of time, a water cannon abnormality signal will be issued to notify relevant personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the basic structure of fire water monitor Figure 2 This is the basic structure diagram of the multi-level fire source positioning system for fire monitors to prevent misjudgment; Figure 3 This is the process of the multi-level fire source location method to prevent misjudgment of fire water monitors Figure 1 ; Figure 4 This is the process of the multi-level fire source location method to prevent misjudgment of fire water monitors Figure 2 ; Figure 5 This is the process of the multi-level fire source location method to prevent misjudgment of fire water monitors Figure 3 ; Figure 6This is a schematic diagram of the relationship between the installation height H of the water monitor, the vertical swing angle β, and the distance between the array sensor and the fire source. Figure 7 It is a schematic diagram of the position deviation between the preset aiming reference position of the array sensor fire and the measured fire point. DETAILED DESCRIPTION Example

[0023] See also Figure 1-2 The figure shows a multi-level fire source positioning system for fire monitors to prevent misjudgment, which is characterized in that the system at least includes First-level all-round detection fire determination unit It includes various types of fire detection alarm equipment or sensors, which are used to preliminarily determine the area of ​​the fire through daily coverage sensing and give a first-level signal; the sensor here is the water cannon's own sensor for daily all-round detection, generally a UV sensor; it can also be the alarm signal generated by other fire detection equipment other than the water cannon transmitted and borrowed.

[0024] Secondary one-way fire determination unit It includes a secondary flame sensor, a water cannon horizontal swing unit and its horizontal swing angle sensor; after the primary signal is generated, the water cannon is swung horizontally to make the secondary infrared fire sensor scan horizontally and determine the horizontal angle of the fire source while giving a secondary signal; the secondary flame sensor refers to a sensor that realizes horizontal scanning to detect fire, including but not limited to infrared sensors, infrared thermal imaging sensors, and image sensors.

[0025] Level 3 one-way fire determination unit; It includes a three-stage flame sensor, a water cannon vertical swing unit and its vertical swing angle sensor; after the secondary signal is generated, the vertical swing water cannon makes the secondary infrared fire sensor scan vertically and determine the vertical angle of the fire source while giving a three-stage signal; the three-stage flame sensor refers to a sensor that realizes vertical scanning to detect fire, including but not limited to infrared sensors, infrared thermal imaging sensors, and image sensors.

[0026] Four-level array fire determination unit: The system includes a 24x24 array sensor. This array sensor rotates with the water monitor nozzle, with the center axis of the array sensor's field of view aligned with the water monitor's water discharge direction. After a three-level signal is generated, the array sensor detects the fire source, obtains flame parameters, and compares them with preset flame parameters to determine if the fire source is a true ignition point. The fire source is determined by comparing the measured sensing parameters with the surrounding parameters of the fire point and the environmental parameters of the water monitor. This method replaces the existing bidirectional scanning method of a single horizontal sensor and a vertical sensor, and finally adds a method for accurately locating the fire point using the sensing parameters measured by the array sensor. This allows for accurate identification of the fire source, as the fire point differs significantly from the surrounding environment or common interference factors. This allows for accurate differentiation, further reducing the water monitor's misjudgment rate and minimizing losses from misjudgment.

[0027] The system is also provided with a distance calculation unit.

[0028] It is used to calculate the distance between the array sensor and the fire source after the three-level signal is generated based on the initial installation height H of the water monitor and the vertical swing angle β measured after the three-level signal is generated. The system includes a mapping unit for the array sensor's preset sensing parameters and sensing distances. This mapping is manually established before the monitor is used. This mapping can be a table or a function, pre-programmed into the system for use by the four-level unit during judgment, enabling informed decisions and improving accuracy.

[0029] The system further includes a parameter comparison unit, which compares the measured sensing parameter with a preset sensing parameter to determine whether the measured sensing parameter represents a fire at the ignition point.

[0030] The measured sensing parameters and the preset sensing parameters in this solution include the temperature parameters of the ignition point and the image parameters of the ignition flame outline, both of which are related to the distance.

[0031] The system also includes a central processing unit, a storage unit, and a communication unit, all of which are also found in existing fire monitors. Combined with sensors, they form a microcomputer system that enables autonomous on-site judgment and action, as well as networked control. The communication unit collects signals from various sensors and sends them to the central processing unit, while also transmitting action commands from the central processing unit to the various execution units. The storage unit is used to store programs and input and output data, and the central processing unit is used to call programs to operate on input signals and output instructions or data. Example

[0032] See also Figure 3 The figure shows a multi-stage fire source location method for preventing misjudgment of a fire cannon using the system in Example 1, which includes at least the following steps: a. Level 1 fire signal When the fire detection alarms or sensors of the standby water cannon detect the fire, they will give a first-level fire signal. b. Secondary fire signal After the first-level fire signal is generated, the water monitor swings horizontally to make the second-level flame sensor scan horizontally and determine the horizontal angle of the fire source, then stops swinging and gives a second-level signal at the same time; c. Level 3 fire signal After the second-level fire signal is generated, the water monitor swings horizontally to make the third-level flame sensor scan vertically and determine the vertical angle of the fire source, then stops swinging and gives a third-level signal at the same time; d. Determine the fire point The array sensor detects the flame, obtains the sensing parameters, and then determines whether the fire source is the ignition point. Example

[0033] See also Figure 4 、 Figure 6 The third embodiment is basically the same as the second embodiment, and the similarities are not repeated. The difference is that: the step a is preceded by a preset step a0. First, multiple sets of mapping data of preset sensing parameters and sensing distances of water monitors are manually measured multiple times. Based on these multiple sets of mapping data, a mapping relationship between the preset sensing parameters and sensing distances is established through calculation, and then the mapping relationship is stored in the system for reference and comparison; Between steps c and d, there is also a distance calculation step c1, which calculates the distance between the array sensor and the fire source based on the installation height H of the water monitor and the vertical swing angle β measured after the three-level signal is generated. The calculation process is performed according to the mathematical laws of triangles.

[0034] In step d, a mapping relationship is first used to obtain preset sensing parameters based on the distance obtained in step c1. The measured sensing parameters are then compared with the preset sensing parameters to determine whether the fire point is present. Because the deviation between the sensing parameters measured by the array sensor and the actual fire parameters gradually increases with increasing sensing distance, it is necessary to first identify this variation pattern and program it into the system. This will enable the array sensor to perform long-distance detection, adapting to the operating environment of water monitors. Example

[0035] See also Figure 5 、 Figure 6 、 Figure 7The fourth embodiment is basically the same as the third embodiment, and the similarities are not repeated. The difference is that the following step a01 is included before step a in the fourth embodiment: When the water cannon is produced and tested, the relative position of the array sensor and the water cannon gun has been determined. The fire source is set corresponding to the position of the water head landing point of the water cannon gun for testing. At this time, the position of the fire source in the array sensor is calibrated as the aiming reference position in its array. The aiming reference position is preferably at the center point of the array. Of course, the position deviating from the center point can also be used.

[0036] Step a01 is repeated multiple times to obtain multiple sets of mapping data of the water head landing point position and the aiming reference position, and the mapping relationship between the two is calculated based on the mapping data. The mapping relationship here can be a mapping table or a function, which is preset in the software in advance and can be called during runtime.

[0037] After step d, there is also step e: the water head landing point is calculated according to the water monitor height H, vertical swing angle β, and water pressure, and then the aiming reference position is determined according to the mapping relationship. Here, the water head landing point is calculated by combining several key factors. If there are other factors affecting it, they can also be considered to be included in the calculation process to make it closer to the actual situation. Figure 7 shown.

[0038] Step e is followed by step f: when the position of the fire point measured in the array sensor of step d is different from the preset aiming reference position, a supplementary deviation is calculated according to the deviation value, and the horizontal swing unit and / or the vertical swing unit of the water cannon are swung and adjusted, so that the position of the fire point measured in the array of the array sensor is close to the preset aiming reference position, and step f is repeatedly performed to adjust the two to coincide to complete the precise adjustment; step f is repeatedly performed here because through each micro-adjustment, the software set in the system calculates the relationship between the swing angle δ of the water cannon spray gun and the displacement of the fire point in the array of the array sensor, which is used to guide the next micro-adjustment. In this way, the intermediate steps of multiple adjustments can appropriately increase the adjusted swing angle, improve the adjustment efficiency, and facilitate the rapid completion of precise adjustment and rapid entry into the fire extinguishing state.

[0039] After step f, there is also a precise fire extinguishing step g: the spray gun is started to spray water to extinguish the fire. Example

[0040] Example 5 is essentially the same as Example 4, and the similarities are not repeated. The difference is that, after step g in Example 5, step h is further provided: tracking the fire point. After step g is performed for a period of time T1, steps e and f are repeated to track the fire point. During the firefighting process, as the primary fire point is extinguished, the secondary fire point may rise to the primary fire point. The method of this application allows for secondary adjustment of the water monitor's posture, achieving tracking and targeting firefighting, further improving firefighting efficiency. Example

[0041] Example 6 is essentially the same as Example 4, and the similarities are not repeated here. The difference is that after step g in Example 6 is performed for a period of time T2, step d is repeated to obtain the sensing parameters of the fire point again. These are compared with the previously obtained sensing parameters of the fire point to determine whether the fire has been extinguished, thereby determining the fire extinguishing effectiveness within time period T2. Furthermore, the four-stage array sensor can also determine the fire extinguishing status. If the fire point is not extinguished after the water monitor has been activated and sprayed for a period of time, a water monitor abnormality signal is issued to notify relevant personnel.

Claims

1. A multi-stage fire source location system for fire monitors to prevent misjudgment, characterized by: The system includes at least First-level all-round detection fire determination unit It includes various types of fire detection and alarm equipment or sensors, which are used to preliminarily determine the area of ​​fire through daily coverage sensing and give a first-level signal; Secondary one-way fire determination unit It includes a secondary flame sensor, a water cannon horizontal swing unit and its horizontal swing angle sensor; After the primary signal is generated, the water monitor is swung horizontally to make the secondary flame sensor scan horizontally and determine the horizontal angle of the fire source while giving the secondary signal; Level 3 one-way fire determination unit; It includes a three-stage flame sensor, a water cannon vertical swing unit and its vertical swing angle sensor; After the secondary signal is generated, the water monitor is swung vertically to make the secondary flame sensor scan vertically and determine the vertical angle of the fire source while giving the tertiary signal; Four-level array fire determination unit: It includes an array sensor, which rotates with the water monitor nozzle, and the central axis of the field of view of the array sensor matches the water discharge direction of the water monitor. After the third-level signal is generated, the array sensor is used to sense the fire source to obtain flame sensing parameters, which are then compared with the preset flame sensing parameters to determine whether the fire source is the real ignition point.

2. The multi-stage fire location system for preventing misjudgment of fire by fire monitors according to claim 1 is characterized in that: The system is also provided with a distance calculation unit.

3. Used to calculate the distance between the array sensor and the fire source after the three-level signal is generated based on the initial installation height H of the water monitor and the vertical swing angle β measured after the three-level signal is generated. A corresponding unit for mapping the preset sensing parameters of the array sensor and the sensing distance is provided inside the system. The mapping relationship between the preset sensing parameters and the sensing distance is artificially established before the water cannon is used.

4. The multi-stage fire location system for preventing misjudgment of fire by fire monitors according to claim 2 is characterized in that: The system further includes a parameter comparison unit, which compares the measured sensing parameter with a preset sensing parameter to determine whether the measured sensing parameter represents a fire at the ignition point.

5. The fire monitor multi-stage anti-misjudgment fire location system according to claim 1 is characterized in that: The system also includes a central processing unit, a storage unit, and a communication unit. The communication unit is used to collect signals from various sensors and send them to the central processor, while transmitting the action instructions issued by the central processor to each execution unit; The storage unit is used to store programs and input and output data, and the central processing unit is used to call programs to operate on input signals and output instructions or data.

6. A method for locating a fire source using a fire monitor with multi-stage anti-misjudgment function using the system of claim 1, comprising at least the following steps: a. Level 1 fire signal When the fire detection alarms or sensors of the standby water cannon detect the fire, they will give a first-level fire signal. b. Secondary fire signal After the first-level fire signal is generated, the water monitor swings horizontally to make the second-level flame sensor scan horizontally and determine the horizontal angle of the fire source, then stops swinging and gives a second-level signal at the same time; c. Level 3 fire signal After the second-level fire signal is generated, the water monitor swings horizontally to make the third-level flame sensor scan vertically and determine the vertical angle of the fire source, then stops swinging and gives a third-level signal at the same time; d. Determine the fire point The array sensor detects the flame, obtains the sensing parameters, and then determines whether the fire source is the ignition point.

7. The multi-stage fire source location method for preventing misjudgment of a fire monitor according to claim 5 is characterized by: The step a also includes a preset step a0 before the step a. First, multiple sets of mapping data of preset sensing parameters and sensing distances of water monitors are manually measured multiple times. Based on these multiple sets of mapping data, a mapping relationship between the preset sensing parameters and sensing distances is established through calculation, and then the mapping relationship is stored in the system for reference and comparison; Between steps c and d, a distance calculation step c1 is also included, in which the distance between the array sensor and the fire source is calculated based on the installation height H of the water monitor and the vertical swing angle β measured after the three-level signal is generated; In the step d, the preset sensing parameters are first obtained through a mapping relationship based on the distance in step c1, and then the measured sensing parameters are compared with the preset sensing parameters to determine whether it is an ignition point.

8. The multi-stage fire source location method for preventing misjudgment of fire by fire monitors according to claim 5 is characterized by: The step a is preceded by the following step a01: When the water cannon is produced and tested, a fire source is set up according to the location of the water cannon's spray gun head. The location of the fire source in the array sensor is calibrated as the aiming reference position in the array. Step a01 is repeated multiple times to obtain multiple sets of mapping data of water head landing point position and aiming reference position, and the mapping relationship between the two is calculated based on the mapping data. Step e is also provided after step d: the water head landing point is calculated according to the water cannon height H, vertical swing angle β, and water pressure, and then the aiming reference position is determined according to the mapping relationship. Step e is followed by step f: when the position of the ignition point measured in the array sensor in step d differs from the preset aiming reference position, a supplementary deviation is calculated based on the deviation value, and the horizontal swing unit and / or the vertical swing unit of the water monitor are swung and adjusted so that the position of the ignition point in the array sensor array approaches the preset aiming reference position, and step f is repeatedly performed until the two coincide to complete the precise adjustment; After step f, there is also a precise fire extinguishing step g: the spray gun is started to spray water to extinguish the fire.

9. The multi-stage fire source location method for preventing misjudgment of fire by fire monitors according to claim 7 is characterized by: After step g, step h is further provided: tracking the ignition point, and step g is performed for a period of time. After time T1, steps e and f are executed again to track the ignition point.

10. The multi-stage fire source location method for preventing misjudgment of fire by fire monitors according to claim 7 is characterized by: After step g is performed for a period of time T2, step d is performed again to obtain the sensing parameters of the ignition point again and compare them with the sensing parameters of the ignition point obtained last time to determine whether the fire is extinguished and determine the fire extinguishing effect within the time period T2.

Images