Hydropower station personnel safety management method, device and equipment and storage medium

Abstract

The invention relates to the technical field of intelligent hydropower, in particular to a hydropower station personnel safety management method, device and equipment based on a two-dimensional electronic fence and a computer storage medium. According to the hydropower station personnel safety management method, only a two-dimensional UWB positioning system needs to be installed, and a three-dimensional electronic fence function is realized in combination with base stations arranged in a layered manner; personnel positioning can be achieved only by arranging the base station on the two-dimensional plane, the number of base station points is small, the construction difficulty is low, special equipment floors which are not easy to construct can be avoided, and the total cost is low.

Description

Technical Field

[0001] The present invention relates to the field of smart hydropower technology, and in particular to a personnel safety management method, device, equipment and computer storage medium for a hydropower station based on a two-dimensional electronic fence. Background Art

[0002] As a special plant building, a hydropower plant building usually has a complex spatial structure, including the main plant, auxiliary plant, control room, transformer room and other parts. These areas are interconnected, with narrow space and numerous passages. Due to the dense equipment in the underground plant, the complex operating environment, and the presence of potential danger sources such as high voltage and high-speed rotating machinery, it poses a threat to personnel safety and has a high safety risk. For some hydropower plant buildings that are restricted by special terrain, the plant is usually located deep underground, with insufficient natural light and limited ventilation conditions. Once a safety accident occurs, escape and rescue are difficult, so the safety of the staff in the underground plant is of vital importance. The electronic fence system can set a safe area to prevent people from mistakenly entering dangerous areas, such as high-voltage equipment areas, mechanical operation areas, etc. In general, the electronic fence is in a two-dimensional form, and the electronic fence layout of the plane is realized by arranging base stations on a plane. For hydropower station buildings, since the operating equipment and operation and maintenance activities exist on multiple floors, the safety area range of each floor is different. Therefore, the two-dimensional electronic fence within a plane cannot meet the personnel safety management needs of the complex multi-story underground plant of the hydropower station. If UWB base stations are arranged in three-dimensional layers in space, the cost will be greatly increased, and it will also bring great difficulties to construction and on-site implementation. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the problem that the two-dimensional electronic fence in the prior art cannot meet the needs of personnel safety management in complex multi-layer underground powerhouses of hydropower stations and the high cost of three-dimensional electronic fences.

[0004] In order to solve the above technical problems, the present invention provides a method for personnel safety management of a hydropower station, comprising:

[0005] Construct a layered 3D model of a hydropower plant building;

[0006] Using multiple UWB base stations pre-arranged on designated floors of the factory building to measure the three-dimensional space distance between them and the person to be located wearing the UWB tag, wherein the number of the UWB base stations is at least three;

[0007] According to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, determine the j-th candidate projection angle of the person to be located on the i-th UWB base station installation plane, and determine the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle;

[0008] When the j-th candidate horizontal projection line corresponding to each three-dimensional space distance intersects within the preset space range, the j-th floor is determined to be the actual floor of the person to be located;

[0009] According to the electronic fence division of the actual floor of the person to be located, the person to be located is subjected to safety monitoring.

[0010] Preferably, the step of constructing a layered three-dimensional model of a hydropower plant building comprises:

[0011] Obtain the actual size and structure data of the plant, the original design drawing data and the actual image data, and construct the modeling data;

[0012] According to the modeling data, a three-dimensional model of the plant is constructed using three-dimensional modeling software.

[0013] Preferably, the method of using a plurality of UWB base stations pre-arranged on a specified number of floors of a factory building to respectively measure the three-dimensional space distance between the base stations and the personnel to be located wearing UWB tags comprises:

[0014] Use multiple UWB base stations pre-arranged on designated floors of the factory to send UWB signals to the personnel to be located wearing UWB tags;

[0015] According to the timestamps recorded by the UWB tags when different UWB signals are received and the propagation speed of the UWB signals, the three-dimensional spatial distance between each UWB base station and the person to be located wearing the UWB tag is calculated respectively.

[0016] Preferably, determining the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, and determining the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle includes:

[0017] Determine the difference between the floor height of each floor of the factory building and the floor height where the UWB base station is located;

[0018] Determine the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the i-th three-dimensional space distance and the difference between the j-th floor height of the factory building and the floor height where the UWB base station is located;

[0019] According to the ith three-dimensional space distance and the jth candidate projection angle, a jth candidate horizontal projection line corresponding to the ith three-dimensional space distance is determined.

[0020] Preferably, when the j-th candidate horizontal projection line corresponding to each three-dimensional space distance intersects within a preset space range, determining the j-th floor as the actual floor of the person to be located comprises:

[0021] When the j-th candidate horizontal projection lines corresponding to each three-dimensional space distance intersect at a point, the j-th floor is determined to be the actual floor of the person to be located.

[0022] Preferably, the method further comprises:

[0023] Each floor of the factory building is divided by electronic fence;

[0024] Set up the core control area to only allow designated personnel to enter during designated operations and for a limited time;

[0025] Set up high-voltage equipment areas to allow access only to authorized personnel with professional training;

[0026] Set the mechanical operation area so that no one can enter;

[0027] Set the maintenance work area to allow only authorized personnel to enter during maintenance work;

[0028] Set up hazardous materials storage areas so that no one can enter;

[0029] The environmental monitoring area of ​​the hydropower station is set to not allow anyone to enter.

[0030] Preferably, the security monitoring of the person to be located according to the electronic fence division of the actual floor of the person to be located comprises:

[0031] Based on the electronic fence division of the actual floor of the person to be located, a personnel safety warning is issued according to the intersection space range position of the jth candidate horizontal projection line corresponding to each three-dimensional space distance.

[0032] The present invention also provides a hydropower station personnel safety management device, comprising:

[0033] 3D model building module, used to build a layered 3D model of a hydropower plant building;

[0034] A UWB distance measurement module is used to measure the three-dimensional space distance between the UWB base stations pre-arranged on the designated floors of the factory and the personnel to be located wearing the UWB tags, wherein the number of the UWB base stations is at least three;

[0035] A projection line determination module is used to determine the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, and determine the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle;

[0036] A personnel positioning module, used for determining the jth floor as the actual floor of the person to be positioned when the jth candidate horizontal projection line corresponding to each three-dimensional space distance intersects within a preset space range;

[0037] The safety monitoring module is used to perform safety monitoring on the person to be located according to the electronic fence division of the actual floor of the person to be located.

[0038] The present invention also provides a hydropower station personnel safety management device, comprising:

[0039] Memory for storing computer programs;

[0040] A processor is used to implement the steps of the above-mentioned method for safety management of hydropower station personnel when executing the computer program.

[0041] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned hydropower station personnel safety management method are implemented.

[0042] The above technical solution of the present invention has the following advantages compared with the prior art:

[0043] The personnel safety management method for a hydropower station described in the present invention only requires the installation of a two-dimensional UWB positioning system, combined with a layered arrangement of base stations, to realize the function of a three-dimensional electronic fence; the present invention only requires the arrangement of base stations in a two-dimensional plane to realize personnel positioning, with a small number of base station locations, low construction difficulty, and the ability to avoid special equipment floors that are difficult to construct, and the total cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0045] Figure 1 It is a flow chart for realizing a method for safety management of hydropower station personnel provided by the present invention;

[0046] Figure 2 It is a schematic diagram of the distance from the base station to the person to be located in the measurement space;

[0047] Figure 3 It is a schematic diagram of the projection of L1x~L3x on the horizontal plane. DETAILED DESCRIPTION

[0048] The core of the present invention is to provide a method, device, equipment and computer storage medium for personnel safety management in a hydropower station. Based on a two-dimensional UWB positioning system, the function of a three-dimensional electronic fence is effectively realized, thereby reducing the overall cost.

[0049] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] Please refer to Figure 1 , Figure 1 This is a flow chart of the implementation of a hydropower station personnel safety management method provided by the present invention; the specific operation steps are as follows:

[0051] S101: constructing a layered three-dimensional model of a hydropower station building;

[0052] S102: using a plurality of UWB base stations pre-arranged on a specified number of floors of a factory building to respectively measure the three-dimensional space distance between the base stations and the personnel to be located wearing the UWB tag, wherein the number of the UWB base stations is at least three;

[0053] S103: determining the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, and determining the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle;

[0054] S104: When the j-th candidate horizontal projection line corresponding to each three-dimensional space distance intersects within the preset space range, determining the j-th floor as the actual floor of the person to be located;

[0055] S105: Performing safety monitoring on the person to be located according to the electronic fence division of the actual floor of the person to be located.

[0056] Based on the above embodiments, this embodiment describes step S101 in detail:

[0057] The present invention pre-arranges UWB base stations on the first floor of the factory building or on a middle floor that is easy to construct, and deploys UWB base stations around the monitoring area to ensure that the signal covers the entire monitoring area, and pre-confirms that personnel in the work area wear UWB tags, so that the UWB tags are attached to the corresponding targets to ensure that the tags move synchronously with the personnel.

[0058] The present invention obtains the actual size and structural data of the factory building through measuring equipment such as laser scanners and total stations, and obtains the original design drawing data, including plan views, elevation views, cross-section views, etc.; and obtains actual image data of the factory building at various angles through shooting; uses the above data as modeling data, applies three-dimensional modeling software, and constructs a layered three-dimensional model of the factory building.

[0059] The present invention pre-extracts the high-rise of each floor and the attached structure: for buildings such as hydropower plant buildings, which are generally structures with less than 6 floors, the floors are fixed in height, so the elevation of each floor is a discrete fixed quantity. The fixed high-rise of each floor is shown in Table 1 below:

[0060] Table 1 Extracted layer height data

[0061] Layer number Factory Name high 1 Turbine layer H1 2 xx Equipment layer H2 …… …… …… n xx Equipment layer H3

[0062] Based on the above embodiments, this embodiment describes step S102 in detail:

[0063] In a specific application, the present invention selects three UWB base stations for subsequent positioning calculations. The three UWB base stations selected here can be the three UWB base stations with the strongest signals, or the three UWB base stations closest to the person to be located, depending on the specific situation.

[0064] Use multiple UWB base stations pre-arranged on designated floors of the factory to send UWB signals to the personnel to be located wearing UWB tags;

[0065] According to the timestamp t recorded by the UWB tag when receiving different UWB signals and the propagation speed v of the UWB signal, the three-dimensional spatial distance L = (t-t0)v between each UWB base station and the person to be located wearing the UWB tag is calculated respectively, where t0 is the time when the UWB base station sends the signal.

[0066] Based on the above embodiments, this embodiment describes step S103 in detail:

[0067] Determine the floor height H of each floor of the factory building j The difference H from the floor height H where the UWB base station is located j ′=H j -H;

[0068] According to the i-th three-dimensional space distance L i and the difference between the height of the jth floor of the factory building and the height of the floor where the UWB base station is located, H j ′, determine the jth candidate projection angle α of the person to be located on the i-th UWB base station installation plane ik =arcsin(H j ′ / L i );

[0069] According to the i-th three-dimensional space distance L i and the jth candidate projection angle α ij , determine the jth candidate horizontal projection line L corresponding to the i-th three-dimensional space distance ij x=L i cosα ij .

[0070] Based on the above embodiments, this embodiment describes step S104 in detail:

[0071] When the j-th candidate horizontal projection lines corresponding to each three-dimensional space distance intersect at a point, the j-th floor is determined to be the actual floor of the person to be located.

[0072] like Figure 2 As shown, in a specific application, the base station layer is the first floor of a factory building, and the floor height H=H1;

[0073] After measuring L1~L3, since the distance is a three-dimensional space distance, the next step is to convert L1~L3 into a projection distance on the horizontal plane:

[0074] Assuming that the person to be located is on the jth floor, generate the projection lines of L1 to L3 on the horizontal plane of the base station layer on the layered 3D model of the factory building:

[0075] Calculate α ij , and then get L 1j x~L 3j When the person to be located is on the jth floor, the projection diagrams of L1 to L3 on the horizontal plane of the base station floor are L1x to L3x, as shown in Figure 3 As shown in Figure 2, when the three lines intersect at one point or approximately intersect at one point, it means that the H corresponding to the jth layer j It is the actual floor height where the person to be located is located.

[0076] The present invention first measures the three-dimensional space distance between the UWB base station and the person to be located, and then uses trigonometric functions (such as sine and cosine) to convert these three-dimensional distances into projection distances on the horizontal plane. This conversion involves calculating the projection angle α, which is determined by the floor height H and the distance L from the base station to the person; on the two-dimensional plane, the horizontal projection distances L1x, L2x, and L3x from each base station to the person can be regarded as the radius of a circle with the base station as the center. The intersection or approximate intersection of these circles on the plane is the estimated position of the person on the horizontal plane. For each possible floor height H, the corresponding projection angle α can be calculated, and then the horizontal projection distance of each base station can be calculated. If these projection distances intersect at one point or approximately intersect at one point on the two-dimensional plane, it means that these distances match the actual measured distances, so the floor height H can be considered to be correct. Geometrically, if three circles (representing the measurement ranges of the three base stations) have a common intersection, then this intersection is the only point that meets the radius conditions of all three circles. This point is geometrically unique unless there are no intersections or multiple intersections between the circles, which usually does not happen in practical applications because the placement of base stations and measurement errors limit this. In practical applications, due to measurement errors and environmental factors, the three circles may not intersect perfectly at one point, but they may intersect approximately at one point. In this case, the optimal floor height can be determined by minimizing the difference between the distance from each base station to the estimated position and the actual measured distance.

[0077] Based on the above embodiments, this embodiment describes step S105 in detail:

[0078] Each floor of the powerhouse is divided by an electronic fence. The electronic fence division of the underground powerhouse of a hydropower station is usually based on the needs of safety areas, operation permissions and equipment protection. The specific division method of the electronic fence of the underground powerhouse of a hydropower station is given below:

[0079] The core control area is set to allow only designated personnel to enter for a limited time when performing designated operations; the core control area includes the main control room, relay protection room, etc. These areas are critical to the operation of the power plant and require the highest level of security protection. Electronic fences are used to prevent any unauthorized access, and permissions are only temporarily opened to specific operators during special and important operations.

[0080] The high-voltage equipment area is set to allow only authorized personnel with professional training to enter; the high-voltage equipment area includes switch stations, transformer rooms, etc. These areas are subject to high-voltage electrical hazards, and electronic fences prohibit unauthorized personnel from entering on a daily basis to ensure that only professionally trained personnel can enter.

[0081] The mechanical operation area is set to not allow anyone to enter; the mechanical operation area includes the pump room, generator room, etc. These areas contain high-speed rotating mechanical equipment. The electronic fence does not allow anyone to enter on a daily basis to protect the safety of operators and other personnel.

[0082] The maintenance work area is set to allow only authorized maintenance personnel to enter during maintenance operations; the maintenance work area includes specific maintenance areas, such as repair workshops, tool rooms, etc., where electronic fences are not set up at ordinary times. The work area is only isolated during maintenance operations to prevent other people from entering by mistake.

[0083] The hazardous material storage area is set to not allow anyone to enter; the hazardous material storage area includes the area where dangerous items such as oil and chemicals are stored. Electronic fences generally do not allow anyone to enter to prevent the leakage or theft of hazardous materials.

[0084] The hydropower station environmental monitoring area is set to not allow anyone to enter. The hydropower station environmental monitoring area includes the groundwater level monitoring station, ventilation control room, etc. The electronic fence is usually closed to the access permission to protect the monitoring equipment and ensure the accuracy of the data and the normal operation of the equipment.

[0085] Emergency evacuation routes: Electronic fences do not have barriers in these areas, but are equipped with sensors to guide people to evacuate quickly in an emergency.

[0086] Visitor areas: For areas open to visitors, electronic fences do not set up obstacles and prevent visitors from entering dangerous areas.

[0087] Through these divisions, the electronic fence system can form a multi-level, all-round security protection network in each underground powerhouse of the hydropower station, effectively improving the safety management level of the power station.

[0088] Based on the electronic fence division of the actual floor of the person to be located, according to the intersection space range position of the jth candidate horizontal projection line corresponding to each three-dimensional space distance, personnel safety warning is carried out; the floor is determined by collecting signals through the UWB base station, and the method of implementing safety management in combination with the electronic fence is implemented. When a person breaks into a restricted area or an unauthorized area, an alarm prompt is automatically popped up at the corresponding position of the layered three-dimensional model of the hydropower plant building.

[0089] The present invention arranges UWB base stations on the first floor of the factory building or the middle floor that is easy to construct, and establishes a layered three-dimensional factory building model. Then, according to the UWB signal transmission time combined with the three-dimensional positioning algorithm, the accurate positioning of the floor where the personnel are located is realized. On this basis, the area can be demarcated on each floor of the factory building to realize the safety management of multi-layer factories. This makes up for the shortcomings of the two-dimensional electronic fence in the prior art and avoids the problem of high cost of the three-dimensional electronic fence.

[0090] The embodiment of the present invention also provides a hydropower station personnel safety management device; the specific device may include:

[0091] 3D model building module, used to build a layered 3D model of a hydropower plant building;

[0092] A UWB distance measurement module is used to measure the three-dimensional space distance between the UWB base stations pre-arranged on the designated floors of the factory and the personnel to be located wearing the UWB tags, wherein the number of the UWB base stations is at least three;

[0093] A projection line determination module is used to determine the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, and determine the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle;

[0094] A personnel positioning module, used for determining the jth floor as the actual floor of the person to be positioned when the jth candidate horizontal projection line corresponding to each three-dimensional space distance intersects within a preset space range;

[0095] The safety monitoring module is used to perform safety monitoring on the person to be located according to the electronic fence division of the actual floor of the person to be located.

[0096] The hydropower station personnel safety management device of this embodiment is used to implement the aforementioned hydropower station personnel safety management method. Therefore, the specific implementation method of the hydropower station personnel safety management device can be seen in the implementation method part of the hydropower station personnel safety management method above. For example, the three-dimensional model construction module, the UWB distance measurement module, the projection line determination module, the personnel positioning module, and the safety monitoring module are respectively used to implement steps S101, S102, S103, S104 and S105 in the above-mentioned hydropower station personnel safety management method. Therefore, its specific implementation method can refer to the description of the corresponding each part of the implementation method, which will not be repeated here.

[0097] A specific embodiment of the present invention also provides a hydropower station personnel safety management device, including: a memory for storing a computer program; a processor for implementing the steps of the above-mentioned hydropower station personnel safety management method when executing the computer program.

[0098] A specific embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned method for safety management of hydropower station personnel are implemented.

[0099] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0100] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0101] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0102] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0103] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A method for safety management of hydropower station personnel, characterized in that: include: Construct a layered 3D model of a hydropower plant building; Using multiple UWB base stations pre-arranged on designated floors of the factory building to measure the three-dimensional space distance between them and the person to be located wearing the UWB tag, wherein the number of the UWB base stations is at least three; According to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, determine the j-th candidate projection angle of the person to be located on the i-th UWB base station installation plane, and determine the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle; When the j-th candidate horizontal projection line corresponding to each three-dimensional space distance intersects within the preset space range, the j-th floor is determined to be the actual floor of the person to be located; According to the electronic fence division of the actual floor of the person to be located, the person to be located is subjected to safety monitoring.

2. The method for safety management of hydropower station personnel according to claim 1, characterized in that: The construction of the layered three-dimensional model of the hydropower station building includes: Obtain the actual size and structure data of the factory, the original design drawing data and the actual image data, Constructing modeling data; According to the modeling data, a three-dimensional model of the plant is constructed using three-dimensional modeling software.

3. The method for safety management of hydropower station personnel according to claim 1, characterized in that: The method of using a plurality of UWB base stations pre-arranged on designated floors of a factory building to respectively measure the three-dimensional space distance between the base stations and the personnel to be located wearing UWB tags includes: Use multiple UWB base stations pre-arranged on designated floors of the factory to send UWB signals to the personnel to be located wearing UWB tags; According to the timestamps recorded by the UWB tags when different UWB signals are received and the propagation speed of the UWB signals, the three-dimensional spatial distance between each UWB base station and the person to be located wearing the UWB tag is calculated respectively.

4. The method for safety management of hydropower station personnel according to claim 1, characterized in that: Determining the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, and determining the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle includes: Determine the difference between the floor height of each floor of the factory building and the floor height where the UWB base station is located; According to the ith three-dimensional space distance and the difference between the jth floor height of the factory building and the floor height where the UWB base station is located, Determine the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane; According to the ith three-dimensional space distance and the jth candidate projection angle, a jth candidate horizontal projection line corresponding to the ith three-dimensional space distance is determined.

5. The method for safety management of hydropower station personnel according to claim 1, characterized in that: When the j-th candidate horizontal projection line corresponding to each three-dimensional space distance intersects within the preset space range, determining the j-th floor as the actual floor of the person to be located comprises: When the j-th candidate horizontal projection lines corresponding to each three-dimensional space distance intersect at a point, the j-th floor is determined to be the actual floor of the person to be located.

6. The method for safety management of hydropower station personnel according to claim 1, characterized in that: The method further comprises: before performing safety monitoring on the person to be located according to the electronic fence division of the actual floor of the person to be located: Each floor of the factory building is divided by electronic fence; Set up the core control area to only allow designated personnel to enter during designated operations and for a limited time; Set up high-voltage equipment areas to allow access only to authorized personnel with professional training; Set the mechanical operation area so that no one can enter; Set the maintenance work area to allow only authorized personnel to enter during maintenance work; Set up hazardous materials storage areas so that no one can enter; The environmental monitoring area of ​​the hydropower station is set to not allow anyone to enter.

7. The method for safety management of hydropower station personnel according to claim 1, characterized in that: The security monitoring of the person to be located according to the electronic fence division of the actual floor of the person to be located includes: Based on the electronic fence division of the actual floor of the person to be located, a personnel safety warning is issued according to the intersection space range position of the jth candidate horizontal projection line corresponding to each three-dimensional space distance.

8. A hydropower station personnel safety management device, characterized in that: include: 3D model building module, used to build a layered 3D model of a hydropower plant building; A UWB distance measurement module is used to measure the three-dimensional space distance between the UWB base stations pre-arranged on the designated floors of the factory and the personnel to be located wearing the UWB tags, wherein the number of the UWB base stations is at least three; A projection line determination module is used to determine the jth candidate projection angle of the person to be located on the i-th UWB base station installation plane according to the measured i-th three-dimensional space distance and the height of the j-th floor of the factory building, and determine the j-th candidate horizontal projection line corresponding to the i-th three-dimensional space distance according to the j-th candidate projection angle; A personnel positioning module, used for determining the jth floor as the actual floor of the person to be positioned when the jth candidate horizontal projection line corresponding to each three-dimensional space distance intersects within a preset space range; The safety monitoring module is used to perform safety monitoring on the person to be located according to the electronic fence division of the actual floor of the person to be located.

9. A hydropower station personnel safety management device, characterized in that: include: Memory for storing computer programs; A processor, used to implement the steps of a hydropower station personnel safety management method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method for safety management of hydropower station personnel as described in any one of claims 1 to 7.

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