An active fire source location system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- STATE GRID HUNAN ELECTRIC POWER COMPANY LIMITED
- Filing Date
- 2023-12-12
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies for fire detection in valve halls suffer from poor flexibility, susceptibility to arc interference, and slow response speed, making it impossible to locate the fire source accurately and in a timely manner.
The fire detection module is driven to slide on the top, bottom and side walls of the valve hall by a sliding rail network and sliding module. Combined with the TDLAS unit to detect CO content, the fire location is calculated by the computing device, and the approximate area of the fire area is calculated by the formula.
It has improved the flexibility and accuracy of fire detection, enhanced the response speed and precision of fire source location, and ensured timely control of fires in the valve hall.
Smart Images
Figure CN117612324B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fire monitoring technology, and more specifically to an active fire source location system. Background Technology
[0002] The valve hall, primarily housing converter valves and related equipment, is the core building within a DC converter station. On one hand, component failures and partial discharges within the converter valve towers can easily ignite fires. On the other hand, a fire originating from the converter transformer outside the valve hall can easily spread to its interior. If a fire within the valve hall is not promptly controlled and extinguished, it can lead to its spread and even the complete destruction of the valve hall, severely threatening the safe operation of the power grid and causing enormous economic losses and extremely negative social impacts. Since personnel cannot enter the valve hall once the equipment is energized, it is crucial to utilize reliable equipment and methods to detect the fire source and accurately locate it in its early stages.
[0003] Currently, the fire detection technologies used in valve halls are mainly ultraviolet flame detection and very early fire detection (also known as air sampling fire detection).
[0004] Ultraviolet (UV) detectors detect flames by monitoring the ultraviolet radiation emitted during the combustion or explosion of flammable materials. However, in valve hall applications, the converter valves suffer from drawbacks such as poor flexibility and susceptibility to interference from abnormal factors like electric arcs within the valve hall, due to potential interference from these factors.
[0005] Early-stage fire detection primarily relies on gas absorption cells to collect ambient air samples within the protected area. These samples are then sent back to the detector for analysis to determine the presence of fire-related materials. However, because the gas absorption cells are located in a fixed position, air sample collection depends on passive sampling via environmental movement, resulting in slow fire source detection.
[0006] In summary, there is an urgent need to develop a fire detection solution in the valve hall of the converter station that is proactive, has a fast response speed, and is stable and reliable. Summary of the Invention
[0007] The purpose of this invention is to provide an active fire source location system that can perform efficient fire monitoring.
[0008] To achieve the above objectives, embodiments of the present invention provide an active fire source location system, comprising:
[0009] Fire detection module, used to detect fire source signals at the scene;
[0010] A network of sliding rails is distributed across the top, bottom, and side walls of the site.
[0011] A sliding module is slidably disposed on the slide rail network and connected to the fire detection module, for driving the fire detection module to slide on the slide rail network;
[0012] A processing unit, connected to the fire detection module, is used to determine the fire location indicated by the fire detection module based on the position of the fire detection module on the slide rail network.
[0013] Optionally, the slide rail network includes multiple slide rails, each of which is perpendicular to each other and distributed on the walls and ceiling of the site;
[0014] The fire detection module is hinged to the sliding module;
[0015] The computing processing device is used for:
[0016] Obtain the first subjective fire location indicated by the fire detection module;
[0017] Control the fire detection module to move to the slide rail network of the adjacent surface;
[0018] Obtain the second subjective fire location indicated by the fire detection module;
[0019] The fire location is calculated based on the first subjective fire location and the second subjective fire location.
[0020] Optionally, the fire detection module comprises two modules.
[0021] Optionally, the computing processing device is used for:
[0022] The location of the first subjective fire is calculated according to formulas (1) to (3).
[0023] x1=|x-ρ 2，1 Sinθ 2，1 |, (1)
[0024] y1=|y-ρ 1，1 sinθ 1，1 |, (2)
[0025] z1=ρ 2，1 cosθ 2，1 (3)
[0026] Where, (ρ 1，1 θ 1，1 ), (ρ 2，1 θ 2，1(x1, y1, z1) are the original polar coordinates of the abnormal signals detected by the two fire detection modules at the first subjective fire location, (x1, y1, z1) are the rectangular coordinates of the first subjective fire location, y is the Y-axis distance of the slide rail where the fire detector is located, and x is the X-axis distance of the slide rail where the fire detection module is located.
[0027] Optionally, the computing processing device is used for:
[0028] The second subjective fire location is calculated according to formulas (4) to (6).
[0029] x2=|x-ρ 2，2 sinθ2, 2|, (4)
[0030] y2=|y-ρ 1，2 sinθ 1，2 |, (5)
[0031] z2=ρ 2，1 cosθ 2，2 (6)
[0032] Where, (ρ 1，2 θ 1，2 ), ( ρ2，2 θ 2，2 (x2, y2, z2) are the original polar coordinates of the abnormal signals detected by the two fire detection modules at the second subjective fire location, and (x2, y2, z2) are the rectangular coordinates of the second subjective fire location.
[0033] Optionally, the computing processing device is used for:
[0034] The location of the fire is determined according to formulas (7) and (8).
[0035]
[0036] S=α·πD 2 / 4, (8)
[0037] Where D is the straight-line distance between the first subjective fire location and the second subjective fire location, α is the margin coefficient, which ranges from 1 to 2, and S is the approximate area of the fire-occurring region.
[0038] Optionally, the fire detection module includes a TDLAS unit for detecting the CO content in ambient gas.
[0039] Optionally, the distance between the sliding rail network and the wall is less than or equal to 10cm.
[0040] Through the above technical solution, the active fire source location system provided by the embodiments of the present invention uses a drive system composed of a sliding rail network and sliding modules to drive the fire detection module to slide on the top, bottom, and side walls of the site, thereby achieving comprehensive detection of the fire status at the scene. Compared with the single or fixed-point sensor detection methods in the prior art, the location system provided by the present invention is more flexible, comprehensive, and accurate.
[0041] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description
[0042] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:
[0043] Figure 1 This is a structural block diagram of an active fire source locating system according to an embodiment of the present invention;
[0044] Figure 2 This is a schematic diagram of a TDLAS unit according to an embodiment of the present invention;
[0045] Figure 3 This is a schematic diagram of the detection path and signal interaction method of a fire detection module according to an embodiment of the present invention in a field (e.g., a ring valve hall);
[0046] Figure 4 This is a flowchart of a method for determining the location of a fire using a computational processing apparatus according to an embodiment of the present invention.
[0047] Explanation of reference numerals in the attached figures
[0048] 1. Fire detection module; 2. Slide rail network
[0049] 3. Sliding module; 4. Computation and processing device Detailed Implementation
[0050] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.
[0051] like Figure 1 The diagram shown is a structural block diagram of an active fire source locating system according to an embodiment of the present invention. Figure 1The positioning system may include a fire detection module 1, a sliding rail network 2, a sliding module 3, and a processing unit 4. The fire detection module 1 is used to detect fire sources at the scene. The sliding rail network 2 can be distributed at the top, bottom, and side walls of the scene. The sliding module 3 is slidably mounted on the sliding rail network 2 and can be connected to the fire detection module 1 to move the fire detection module 1 along the sliding rail network 2. The processing unit 4 is connected to the fire detection module 1 and is used to determine the fire location indicated by the fire detection module 1 based on its position on the sliding rail network 2.
[0052] In such Figure 1 In the positioning system shown, the fire detection module 1 can be used to detect fire source signals at the scene. The specific structure of the fire detection module 1 can take many forms known to those skilled in the art. In one example of the present invention, the fire detection module 1 may include a TDLAS unit for detecting the CO content in the ambient gas. Specifically, as... Figure 2 As shown, the TDLAS unit may include a signal generator for transmitting probe and reference signals, a laser controller for emitting probe laser, an optoelectronic amplifier for gaining laser signal, a lock-in amplifier for extracting signal amplitude and phase information, an off-axis parabolic mirror for focusing the beam, and a right-angle prism for changing the direction of the emitted laser beam.
[0053] Considering the relatively small detection area covered by fire detection module 1, a combination of slide rail network 2 and sliding module 3 is needed to move fire detection module 1 on-site. The specific structure of slide rail network 2 can be of various forms known to those skilled in the art. In one example of the invention, slide rail network 2 may include multiple slide rails, each perpendicular to each other, distributed on the walls and ceiling on-site. Fire detection module 1 can be hinged to sliding module 3, so that fire detection module 1 can also rotate when sliding module 3 slides, thereby achieving wider coverage. Under the coverage of slide rail network 2, the detection path and signal interaction method of fire detection module 1 on-site (e.g., in a valve room) can be as follows: Figure 3 As shown. Furthermore, to ensure complete scanning and detection of the site, the distance between the slide rail network 2 and the wall can be less than or equal to 10cm. To facilitate the installation of the slide rail network 2, grooves for embedding sliding rollers can be provided on the walls, floors, and ceilings of the site.
[0054] Regarding the sliding module 3, provided it can ensure that the fire detection module 1 slides on the slide rail network 2, the sliding module 3 can be of various structures known to those skilled in the art. In one example of the present invention, the sliding module 3 may include a rolling pulley, a connecting mechanism, and a driving mechanism. The sliding pulley of the sliding module can be installed in the track of the slide rail network located on site. The connecting mechanism of the sliding module may include bolts, a connecting base, and a fixed shaft. The sliding pulley of the sliding module can be fixed to the fixed shaft and fixedly connected to the connecting base by bolts. The driving mechanism of the sliding module is a motor, and the sliding pulley is mounted on the motor.
[0055] The processing unit 4 can be used to determine the fire location indicated by the fire detection module 1 based on the position of the fire detection module 1 on the slide rail network 2. The specific method for determining the fire location can be of various forms known to those skilled in the art. In one example of the invention, the processing unit 4 can be used to perform actions such as... Figure 4 The method shown in the diagram. Figure 4 In this process, the processing unit 4 can be used to perform the following steps:
[0056] In step S10, the first subjective fire location indicated by the fire detection module 1 is obtained;
[0057] In step S11, the fire detection module 1 is moved to the slide rail network of the adjacent surface;
[0058] In step S12, the second subjective fire location indicated by the fire detection module 1 is obtained;
[0059] In step S13, the fire location is calculated based on the first subjective fire location and the second subjective fire location.
[0060] In such Figure 4 In the method shown, steps S10 and S12 are used to obtain the first subjective fire position and the second subjective fire position from two mutually perpendicular angles, respectively, while step S13 can calculate the fire position based on the first subjective fire position and the second subjective fire position, thereby avoiding the error caused by detection from a single angle.
[0061] The method for determining the first fire location can take many forms known to those skilled in the art. In one example of the present invention, to avoid the problem of a single fire detection module 1 having a single perspective, the fire detection module 1 can be two. Accordingly, the method by which the processing device 4 calculates the first subjective fire location can be using the following formulas (1) to (3).
[0062] x1=|x-ρ 2，1 sinθ 2，1 |, (1)
[0063] y1=|y-ρ 1，1 sinθ 1，1 |, (2)
[0064] z1=ρ 2，1 cosθ 2，1 (3)
[0065] Where, (ρ 1，1 θ 1，1 ), (ρ 2，1 θ 2，1 (x1, y1, z1) are the original polar coordinates of the abnormal signals detected by the two fire detection modules at the first subjective fire location, (x1, y1, z1) are the rectangular coordinates of the first subjective fire location, y is the Y-axis distance of the slide rail where the fire detector is located, and x is the X-axis distance of the slide rail where the fire detection module is located.
[0066] The method for determining the second subjective fire location can take many forms known to those skilled in the art. In one example of the present invention, to avoid the problem of a single fire detection module 1 having a single perspective, the fire detection module 1 can be two. Accordingly, the method by which the processing device 4 calculates the second subjective fire location can be using the following formulas (4) to (6).
[0067] x2=|x-ρ 2，2 sinθ 2，2 |, (4)
[0068] y2=|y-ρ 1，2 sin0 1，2 |, (5)
[0069] z2=ρ 2，1 cosθ 2，2 (6)
[0070] Where, (ρ 1，2 θ 1，2 ), (ρ 2，2 θ 2，2 (x1, y2, z2) are the original polar coordinates of the abnormal signals detected by the two fire detection modules at the second subjective fire location, and (x2, y2, z2) are the rectangular coordinates of the second subjective fire location.
[0071] Based on the first subjective fire location and the second subjective fire location calculated by formulas (1) to (6) above, the calculation processing device 4 can further determine the final fire location according to formulas (7) and (8).
[0072]
[0073] S=α·πD 2 / 4, (8)
[0074] Where D is the straight-line distance between the first subjective fire location and the second subjective fire location, α is the margin coefficient, which ranges from 1 to 2, and S is the approximate area of the fire-occurring region.
[0075] Through the above technical solution, the active fire source location method and system provided by the embodiments of the present invention achieves comprehensive detection of the on-site fire status by setting up a drive system composed of a sliding rail network and sliding modules to drive the fire detection module to slide on the top, bottom, and side walls of the site. Compared with the single or fixed-point sensor detection methods in the prior art, the location method and system provided by the present invention are more flexible, comprehensive, and accurate.
[0076] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0077] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0078] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0079] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0080] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.
[0081] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.
[0082] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.
[0083] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0084] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. An active fire source location system, characterized in that, The positioning system includes: Fire detection module, used to detect fire source signals at the scene; A network of sliding rails is distributed across the top, bottom, and side walls of the site. A sliding module is slidably disposed on the slide rail network and connected to the fire detection module, for driving the fire detection module to slide on the slide rail network; A processing unit, connected to the fire detection module, is used to determine the fire location indicated by the fire detection module based on the position of the fire detection module on the slide rail network. The slide rail network includes multiple slide rails, each of which is perpendicular to each other and distributed on the walls and ceiling of the site; The fire detection module is hinged to the sliding module; The computing processing device is further used for: Obtain the first subjective fire location indicated by the fire detection module; Control the fire detection module to move to the slide rail network of the adjacent surface; Obtain the second subjective fire location indicated by the fire detection module; The fire location is calculated based on the first subjective fire location and the second subjective fire location. The location of the first subjective fire is calculated according to formulas (1) to (3). ，（1） ，（2） ，（3） in,( , (), , ) are the original polar coordinates of the abnormal signals detected by the two fire detection modules at the first subjective fire location, respectively. , , () represents the rectangular coordinates of the first subjective fire location. This is the Y-axis distance of the slide rail where the fire detector is located. The X-axis distance of the slide rail where the fire detection module is located; The second subjective fire location is calculated according to formulas (4) to (6). ，（4） ，（5） ，（6） in,( , (), , These are the original polar coordinates of the abnormal signals detected by the two fire detection modules at the second subjective fire location. , , () represents the rectangular coordinates of the second subjective fire location; The location of the fire is determined according to formulas (7) and (8). ，（7） ，（8） in, The straight-line distance between the first subjective fire location and the second subjective fire location is given. This is the margin coefficient, with a value ranging from 1 to 2. This represents the approximate area of the region where the fire occurred.
2. The positioning system according to claim 1, characterized in that, There are two fire detection modules.
3. The positioning system according to claim 1, characterized in that, The fire detection module includes a TDLAS unit for detecting the CO content in ambient gas.
4. The positioning system according to claim 1, characterized in that, The distance between the sliding rail network and the wall is less than or equal to 10cm.