A safety assessment system for hydropower station dam construction projects

Abstract

This invention discloses a safety assessment system for hydropower station dam construction projects, relating to the field of engineering safety systems. The system includes several monitoring modules, a fitting unit, a distance measurement unit, a calculation unit, a trajectory acquisition unit, an analysis unit, and a safety assessment unit. This system can predict the swing amplitude of the hoisting tank and then perform safety prediction and assessment based on the predicted swing amplitude. Compared with traditional real-time swing amplitude, it can predict the swing amplitude of the hoisting tank in advance, thereby enabling corresponding safety protection in advance, resulting in higher safety.

Description

Technical Field

[0001] This invention relates to the field of engineering safety systems, and more specifically, to a safety assessment system for hydropower station dam construction projects. Background Technology

[0002] One of the important engineering projects in the construction of large hydropower stations is dam pouring. Large hydropower station dam pouring projects are characterized by long construction periods and large quantities of work, requiring a large amount of concrete to be poured.

[0003] Hydropower stations are typically built in river valleys. When constructing a dam in a river valley, cable cranes are used to hoist buckets to transport concrete. The cable cranes are crucial equipment in the dam construction process, responsible for hoisting concrete and other materials. Wind protection is a critical safety measure during dam construction. Since hydropower stations are usually built in river valleys, which are prone to strong winds due to their narrow terrain, the buckets are typically hoisted using long cables. In strong winds, these buckets are susceptible to significant swaying, which can lead to accidents. Therefore, safety assessments of cable crane operations in windy conditions are necessary.

[0004] The existing safety assessment method involves calculating the swing amplitude of the load suspended by the cable crane and then determining safety based on the swing amplitude. For example, the published patent CN111606215A describes a technical solution that calculates the real-time swing amplitude of the load relative to the cable crane hook based on wind speed, wind direction, air density, the windward area of ​​the load, and the included angle. This technical solution can calculate the real-time swing amplitude, but it has the following drawbacks: the solution detects the real-time wind speed, specifically the real-time wind speed on the cable crane, and then calculates the real-time swing amplitude based on this wind speed. However, this technical solution has the following problems in actual implementation: since it monitors the real-time swing amplitude, when the real-time swing amplitude exceeds the safe swing amplitude, a safety accident may be imminent or has already occurred, leaving insufficient time for safety management departments or personnel to react, resulting in relatively delayed safety response measures and corresponding safety hazards. Summary of the Invention

[0005] The purpose of this invention is to predict the swing amplitude of the suspended tank and then perform a safety prediction assessment based on the predicted swing amplitude. Compared with the traditional real-time swing amplitude, this invention can predict the swing amplitude of the suspended tank in advance, thereby enabling corresponding safety protection in advance and resulting in higher safety.

[0006] To achieve the above-mentioned objectives, this invention provides a safety assessment system for hydropower station dam construction projects, the system comprising:

[0007] It includes several monitoring modules, fitting units, ranging units, calculation units, trajectory acquisition units, analysis units, and safety assessment units;

[0008] Several monitoring modules are evenly distributed in the upstream and downstream sections of the valley corresponding to the location of the hydropower station dam construction. Each monitoring module is used to obtain the wind speed, wind direction and valley width values ​​at the corresponding monitoring point.

[0009] The data transmission unit is used to transmit the data acquired by the monitoring module to the fitting unit;

[0010] The fitting unit is used to obtain fitting data based on the wind speed value and valley width value of each monitoring point, and to process the fitting data to obtain the fitting value between the wind speed and the valley width.

[0011] The ranging unit is used to measure the first width of the valley corresponding to the location of the hydropower station dam;

[0012] The calculation unit is used to predict a first predicted wind speed value blowing towards the location of the hydropower station dam based on the fitted value and the first width value; and to predict the predicted swing amplitude value of the canister in the cable crane under wind blowing based on the first predicted wind speed value.

[0013] The trajectory acquisition unit is used to obtain the running trajectory data of the hoisting tank from the operating system of the cable crane;

[0014] The analysis unit is used to collect image data within a preset range of the area traversed by the running trajectory, analyze the shortest straight-line distance between the edge of each target in the image data and the running trajectory, obtain a set of shortest straight-line distances, and obtain a safe distance value by taking the minimum value from the elements of the set of shortest straight-line distances.

[0015] A safety assessment unit is used to compare the predicted swing amplitude value and the safety distance value to obtain a comparison result, and to obtain a safety assessment result based on the comparison result.

[0016] The traditional approach involves installing wind speed measuring equipment on the cable crane to obtain real-time wind speed, and then calculating the real-time sway amplitude based on the real-time wind speed. In contrast, this invention aims to obtain predicted wind speed, predict the sway amplitude based on the predicted wind speed, and then use the predicted sway amplitude in advance to buy time for safety measures, thus achieving higher safety.

[0017] The key feature of this invention is wind speed prediction. The applicant's research found that hydroelectric dams are built in river valleys, and the wind speed in a valley is related to the width of the valley. For example, in narrow valleys, the airflow speed is higher due to the smaller area through which the airflow passes, while in wide valleys, the airflow speed is lower due to the larger area. Therefore, this invention designs multiple monitoring modules, each used to obtain the wind speed, wind direction, and valley width at the corresponding monitoring point. The purpose of obtaining the wind direction is to perform the corresponding calculations only when the wind is blowing towards the dam area, avoiding unnecessary calculations when the wind blows in other directions and will not affect the safety of the dam.

[0018] To accurately describe the relationship between valley width and wind speed, this invention designs a fitting unit. The fitting unit obtains fitting data based on the wind speed and valley width values ​​at each monitoring point. Based on the fitting data, a fitting value between wind speed and valley width is obtained. A ranging unit measures the first width of the valley corresponding to the location of the hydropower station dam. A calculation unit predicts the first predicted wind speed blowing towards the dam location based on the fitting value and the first width value. Finally, based on the first predicted wind speed value, the predicted sway amplitude of the hoisting canister in the cable crane under wind force is predicted. Through these methods, the predicted sway amplitude can be obtained accurately and in advance, allowing for the implementation of corresponding safety measures based on the predicted sway amplitude.

[0019] Unlike existing technologies, which design a maximum swing amplitude limit and determine safety by comparing the real-time swing amplitude with the maximum swing amplitude limit (e.g., exceeding the limit is unsafe, while below it is safe), the applicant's research found that during dam construction, the equipment and facilities at the construction site change in real time with the progress of the project. For example, the erection of the steel reinforcement structure, the placement of equipment, and the locations of the machine room, power distribution room, and cables all change as the project progresses. The traditional approach of setting a fixed maximum swing amplitude limit for safety assessment is unreasonable. For instance, according to the traditional technical solution, if the real-time swing amplitude is determined to be less than the maximum swing amplitude limit, a safe state is considered, and the cable crane continues to operate. However, if obstacles appear around the operating route and their straight-line distance to the cable crane is less than the real-time swing amplitude, a collision accident will occur. There are many obstacles with uncertain locations at the construction site, as described above. The system includes steel bars, scaffolding, machine room, power distribution and supply equipment, etc. Therefore, to avoid the above situation, the present invention has made corresponding improvements: The system uses a trajectory acquisition unit to obtain the running trajectory data of the hoisting vessel from the operating system of the cable crane. The running trajectory of the hoisting vessel is easily obtained through the trajectory data. The analysis unit collects image data within a preset range of the area traversed by the running trajectory. The image data can be used to obtain possible obstacle targets in the relevant path of the hoisting vessel's running trajectory. The system analyzes the shortest straight-line distance between the edge of each target in the image data and the running trajectory. By analyzing the distance between the target and the trajectory in the image, the system judges whether it is safe. The system is safer and obtains a set of shortest straight-line distances. The minimum value is taken from the elements of the set of shortest straight-line distances to obtain the safe distance value. The safety assessment unit compares the predicted swing amplitude value and the safe distance value to obtain a comparison result. The safety assessment result is obtained based on the comparison result.

[0020] Preferably, the monitoring module includes:

[0021] Anemometer, wind direction meter, distance meter, mounting base, extension support mechanism, mounting platform and power supply equipment;

[0022] The mounting base is fixed to the mountainside in the valley, facilitating the installation and fixation of the monitoring module. A distance measuring instrument is mounted on the mounting base and is used to measure the distance between the mountains on both sides of the valley to obtain the valley width value. One end of the extension support mechanism is connected to the mounting base, and the other end extends towards the center of the valley and connects to the installation platform. An anemometer and wind direction meter are mounted on the installation platform. The power supply equipment is used to power the electrical equipment in the monitoring module.

[0023] Preferably, the fitted data includes: N data pairs, each data pair including a wind speed value and a valley width value; the ratio of the wind speed value to the valley width value in each data pair is calculated to obtain N ratios, and the average of the N ratios is used to obtain the fitted value. The first predicted wind speed value is calculated as follows: V 预测 = First width value * Fitted value, where V 预测 This represents the first predicted wind speed value, and * is a multiplication sign.

[0024] Preferably, the analysis unit includes:

[0025] The first image acquisition module is used to acquire image data in the horizontal direction;

[0026] The second image acquisition module is used to acquire image data in the vertical direction;

[0027] The analysis module is used to identify targets in the image data, extract the contour information of the targets based on the identification results, obtain the shortest straight-line distance between the edge of the target and the running trajectory based on the contour information, obtain the shortest straight-line distance set based on the shortest straight-line distance corresponding to each target, and obtain the safe distance value by taking the minimum value from the elements of the shortest straight-line distance set.

[0028] The cable crane operates in two directions: horizontal and vertical. Horizontal movement is used, such as moving horizontally from the base of the cable crane to the top of the dam and transporting the hoisting container back to the base. Vertical movement is used, such as lowering the hoisting container from the top of the dam to the pouring position and retrieving the container. Therefore, in order to identify targets corresponding to obstacles in different directions along the operating trajectory, two image acquisition modules were designed: a first image acquisition module and a second image acquisition module, which are used to acquire image data in the horizontal and vertical directions, respectively.

[0029] Preferably, the analysis unit is further configured to record the location information of each target and send the target location information to the security assessment unit;

[0030] If the predicted swing amplitude is less than the safe distance value, the safety assessment result is safe, and the cable crane continues to operate. If the predicted swing amplitude is greater than or equal to the safe distance value, the safety assessment result is dangerous, and the target corresponding to the safe distance value is set as a dangerous target. Dangerous location information is obtained based on the location information of the dangerous target. Based on the dangerous location information, a control command to move away from the dangerous target is generated and sent to the cable crane's operating system. The cable crane's operating system controls the canister to move away from the dangerous target and retract the canister to the cable crane base based on the control command. Alternatively, the cable crane's operating system controls the canister to move away from the dangerous target and lower the canister to a safe area based on the control command.

[0031] Existing technologies either stop or retract the cable car without considering the location of obstacles or the cable car's direction and status. Collisions may occur during the cable car's retraction, posing a safety hazard. In contrast, when the safety assessment result is dangerous, this system can obtain the dangerous location information and generate control commands to move away from the dangerous target based on the dangerous location information. These commands are then sent to the cable car's operating system. That is, if the target is in the forward direction, the system will reverse; if the target is in the reverse direction, the system will move forward, thus avoiding collisions with the target and improving safety.

[0032] Preferably, both the first image acquisition module and the second image acquisition module are installed on the load-bearing trolley of the cable crane.

[0033] Preferably, if the predicted swing amplitude value is less than the safe distance value, the safety assessment result is safe and the cable crane continues to operate; if the predicted swing amplitude value is greater than or equal to the safe distance value, the safety assessment result is dangerous. The safety assessment unit obtains the real-time position of the hoisting can from the cable crane's operating system, calculates the time T1 required to retrieve the hoisting can to the cable crane base and the time T2 required to lower the hoisting can to the safe area based on the real-time position, compares the values ​​of T1 and T2, and if T1 is greater than T2, the hoisting can is lowered to the safe area; if T1 is less than or equal to T2, the hoisting can is retrieved to the cable crane base.

[0034] In existing technologies, the cable crane is either stopped or retrieved. When the cable crane is near the pouring position, retrieval requires first lifting the canister, retrieving the cable, and then moving the load trolley to the base. This process is time-consuming and increases the exposure time in windy weather, posing a safety hazard. In contrast, this invention compares the time T1 required to retrieve the canister to the cable crane base and the time T2 required to lower the canister to a safe area, selecting the shorter time to perform the corresponding operation. This reduces the exposure time of the canister in windy weather and improves safety.

[0035] Preferably, the system further includes an alarm unit, which is used to issue an alarm when the first predicted wind speed value is greater than a threshold. In windy weather, safety accidents are prone to occur; the alarm unit can be used to issue warnings and provide appropriate safety alerts.

[0036] Preferably, the system further includes a statistical unit and a prediction unit; the statistical unit is used to collect wind speed values ​​and corresponding time data for each monitoring module to obtain statistical data, obtain training data based on the statistical data, and train a prediction model based on the training data to obtain a wind speed prediction model; the prediction unit is used to predict the wind speed value at a preset time based on the wind speed prediction model. This system, utilizing the statistical unit and prediction unit, can predict wind speed values ​​for future time periods using machine learning, enabling wind speed predictions to be made much earlier and providing more time for safe processing.

[0037] Preferably, the applicant's research found that wind speed in a river valley is related to the cross-sectional area that can pass through the valley. In addition to being related to the width of the valley, it is also related to the water level. For example, the water level can differ by several meters or even more than ten meters during the flood season and the drought season, which has a corresponding impact on the wind speed in the valley. Therefore, in order to make a more accurate judgment, the monitoring module in this system is also used to monitor the river surface water level to obtain water level data, and adjust the threshold based on the water level data. For example, the threshold is reduced when the water level is high and increased when the water level is low.

[0038] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0039] (1) This system can predict the swing amplitude of the hanging tank and then make a safety prediction assessment based on the predicted swing amplitude. Compared with the traditional real-time swing amplitude, it can predict the swing amplitude of the hanging tank in advance and thus carry out corresponding safety protection in advance, which is safer.

[0040] (2) This system can obtain dangerous location information, generate control commands to move away from dangerous targets based on dangerous location information and send them to the cable car's operating system to avoid collisions with targets and improve safety.

[0041] (3) By comparing the time T1 required to retrieve the hoisting tank to the cable machine base and the time T2 required to lower the hoisting tank to the safe area, the present invention selects the shorter time to perform the corresponding operation, thereby reducing the exposure time of the hoisting tank in windy weather and ensuring higher safety. Attached Figure Description

[0042] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention.

[0043] Figure 1 This is a schematic diagram of the composition of a safety assessment system for hydropower station dam construction projects according to the present invention. Detailed Implementation

[0044] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.

[0045] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0046] Example 1;

[0047] Please refer to Figure 1 , Figure 1 This invention provides a safety assessment system for hydropower station dam construction projects, comprising: (The diagram shows the system components.)

[0048] It includes several monitoring modules, fitting units, ranging units, calculation units, trajectory acquisition units, analysis units, and safety assessment units;

[0049] Several monitoring modules are evenly distributed in the upstream and downstream sections of the valley corresponding to the location of the hydropower station dam construction site. Each monitoring module is used to obtain the wind speed, wind direction and valley width at the corresponding monitoring point. The number of monitoring modules can be adjusted according to the length of the valley and actual needs. This embodiment of the invention does not impose any corresponding limitations.

[0050] The data transmission unit is used to transmit the data collected by the monitoring module to the fitting unit; the data transmission unit can use wired transmission or wireless transmission, and the embodiments of the present invention do not impose any restrictions on it;

[0051] The fitting unit is used to obtain fitting data based on the wind speed value and valley width value of each monitoring point, and to process the fitting data to obtain the fitting value between the wind speed and the valley width.

[0052] The ranging unit is used to measure the first width of the valley corresponding to the location of the hydropower station dam; the ranging unit can be a rangefinder or a distance measuring device, and the embodiments of the present invention do not impose any corresponding limitations.

[0053] The calculation unit is used to predict a first predicted wind speed value blowing towards the location of the hydropower station dam based on the fitted value and the first width value; and to predict the predicted swing amplitude value of the canister in the cable crane under wind blowing based on the first predicted wind speed value.

[0054] The trajectory acquisition unit is used to obtain the running trajectory data of the hoisting tank from the operating system of the cable crane. In practical applications, the trajectory acquisition unit first interfaces with the operating system of the cable crane to realize data transmission and obtain the running trajectory data of the hoisting tank in real time.

[0055] The analysis unit is used to collect image data within a preset range of the area traversed by the running trajectory, analyze the shortest straight-line distance between the edge of each target in the image data and the running trajectory, obtain a set of shortest straight-line distances, and obtain a safe distance value by taking the minimum value from the elements of the set of shortest straight-line distances. The analysis unit can use existing image analysis methods, including target recognition and target contour extraction. Target recognition and target contour extraction are common methods in image processing, and will not be described in detail in this invention.

[0056] A safety assessment unit is used to compare the predicted swing amplitude value and the safety distance value to obtain a comparison result, and to obtain a safety assessment result based on the comparison result.

[0057] In this embodiment of the invention, the monitoring module includes:

[0058] Anemometer, wind direction meter, distance meter, mounting base, extension support mechanism, mounting platform and power supply equipment;

[0059] The mounting base is fixed to the mountainside in the valley; the rangefinder is mounted on the mounting base and is used to measure the distance between the mountains on both sides of the valley to obtain the valley width value; one end of the extension support mechanism is connected to the mounting base, and the other end of the extension support mechanism extends towards the center of the valley and is connected to the installation platform; the wind speed meter and wind direction meter are mounted on the installation platform; the power supply equipment is used to supply power to the electrical equipment in the monitoring module.

[0060] The installation base can be pre-embedded in the mountain or fixed to the mountain using appropriate fixing ropes or nails.

[0061] The extension support mechanism can be a long pole, an electric telescopic pole, or a wooden board, and the power supply equipment can be a battery or a solar power supply.

[0062] In this embodiment of the invention, the fitted data includes: N data pairs, each data pair including a wind speed value and a valley width value; the ratio of the wind speed value to the valley width value in each data pair is calculated to obtain N ratios, and the average of the N ratios is used to obtain the fitted value. The first predicted wind speed value is calculated as follows: V 预测 = First width value * Fitted value, where V 预测 This represents the first predicted wind speed value, and * is a multiplication sign.

[0063] In this embodiment of the invention, the analysis unit includes:

[0064] The first image acquisition module is used to acquire image data in the horizontal direction;

[0065] The second image acquisition module is used to acquire image data in the vertical direction; wherein, the first image acquisition module and the second image acquisition module can be a camera or a video camera, and the present invention does not impose specific limitations;

[0066] The analysis module is used to identify targets in the image data, such as steel bars, scaffolding, cables, machine rooms, and equipment. Based on the identification results, the module extracts the contour information of the targets, such as the outer frame contour of a power distribution room. Based on the contour information, the module obtains the shortest straight-line distance between the edge of the target and the running trajectory. For example, the shortest distance between the edge of the outer frame and the running trajectory is 5m. Based on the shortest straight-line distance corresponding to each target, the module obtains a set of shortest straight-line distances, such as (5m, 6.5m, 7m, 7.3m, 6.2m, 10m). The module takes the minimum value from the elements of the shortest straight-line distance set to obtain the safe distance value of 5m.

[0067] In this embodiment of the invention, the analysis unit is further configured to record the location information of each target and send the target's location information to the security assessment unit;

[0068] If the predicted swing amplitude is less than the safe distance value, the safety assessment result is safe, and the cable crane continues to operate. If the predicted swing amplitude is greater than or equal to the safe distance value, the safety assessment result is dangerous, and the target corresponding to the safe distance value is set as a dangerous target. Dangerous location information is obtained based on the location information of the dangerous target. A control command to move away from the dangerous target is generated based on the dangerous location information and sent to the cable crane's operating system. The cable crane's operating system, based on the control command, controls the canister to move away from the dangerous target and retract it to the cable crane base. Alternatively, the cable crane's operating system, based on the control command, controls the canister to move away from the dangerous target and lower it to a safe area. For example, if a dangerous target is detected in the forward or downward movement while the cable crane is lifting the canister to the dam, the canister will be lifted back to the cable crane base. Similarly, if a dangerous target is detected in the forward or upward movement while the cable crane is lifting the canister back to the cable crane base, the canister will be lowered to a safe area, such as the ground.

[0069] The calculation method for the swing amplitude can refer to CN111606215A, or other existing calculation methods can be used. This embodiment of the invention does not impose specific limitations.

[0070] In this embodiment of the invention, both the first image acquisition module and the second image acquisition module are mounted on the load-bearing trolley of the cable car. They can be fixedly installed or flexibly installed; for example, the first and second image acquisition modules can be cameras, mounted on corresponding shooting gimbals, and then the shooting gimbals or brackets are fixed to the load-bearing trolley, allowing for convenient adjustment of the shooting angle.

[0071] In this embodiment of the invention, if the predicted swing amplitude is less than the safe distance value, the safety assessment result is safe, and the cable car continues to operate; if the predicted swing amplitude is greater than or equal to the safe distance value, the safety assessment result is dangerous. The safety assessment unit obtains the real-time position of the hoisting can from the cable car's operating system, such as the coordinates of the hoisting can in the preset operating trajectory. Based on the real-time position, it calculates the time T1 required to retrieve the hoisting can to the cable car base and the time T2 required to lower the hoisting can to the safe area. The calculation method can obtain the distance information based on the trajectory, obtain the remaining distance information based on the distance information and the current coordinate information, and then calculate the required time based on the moving speed and the remaining distance information. The value between T1 and T2 is compared. If T1 is greater than T2, the hoisting can be lowered to the safe area; if T1 is less than or equal to T2, the hoisting can be retrieved to the cable car base. By selecting the operation with the shorter time, the exposure time in strong winds can be reduced, thus reducing safety hazards.

[0072] In this embodiment of the invention, the system further includes an alarm unit, which is used to issue an alarm when the first predicted wind speed value is greater than a threshold. The alarm can be issued by sending alarm information to a preset terminal via a communication module, or by using an audible and visual alarm.

[0073] In this embodiment of the invention, the system further includes a statistical unit and a prediction unit. The statistical unit is used to collect wind speed values ​​and corresponding time data from each monitoring module to obtain statistical data, obtain training data based on the statistical data, and train a prediction model based on the training data to obtain a wind speed prediction model. The prediction unit is used to predict the wind speed value at a preset time based on the wind speed prediction model. The prediction model can adopt a prediction model commonly used in machine learning. This embodiment of the invention does not impose specific limitations, and the model parameters and type can be selected and adjusted according to actual needs.

[0074] In this embodiment of the invention, the monitoring module is further used to monitor the river surface water level to obtain water level data, and adjust the threshold based on the water level data. The water level data can be obtained through a water level sensor or a water level gauge. The adjustment method and magnitude of the threshold can be selected and adjusted according to actual needs, and this embodiment of the invention does not impose specific limitations.

[0075] In this embodiment of the invention, the system further includes a windproof and flow-guiding unit, which is used to provide windproof and flow-guiding protection for the hanging tank when the safety assessment result is dangerous.

[0076] The windproof and flow-guiding protection for the suspended tank is specifically implemented by: activating the backup cable crane, which hoists the windproof and flow-guiding unit to both sides of the suspended tank and controls the windproof and flow-guiding unit to run synchronously with the suspended tank until the suspended tank returns to the cable crane base or is lowered to a safe area.

[0077] The windproof and flow-guiding protection for the hanging tank specifically includes:

[0078] Check if the cable crane is currently hoisting a canister. If not, shut down the cable crane to avoid operation in windy weather. Resume operation after the windy weather subsides. If a canister is present, activate the backup cable crane. The backup cable crane will hoist the wind deflector unit to both sides of the canister and control the wind deflector unit to move synchronously with the canister until it returns to the cable crane's hoisting base. The wind deflector unit, hoisted to both sides of the canister, blocks and guides the airflow blowing towards the canister from both sides, reducing the speed and changing the direction of the airflow. This reduces the swaying amplitude of the canister and enhances its safety. The synchronous operation of the wind deflector unit with the canister provides wind protection and ensures the canister can operate normally to complete the hoisting task until it returns to the cable crane's hoisting unit base. Then, retrieve the canister and resume the hoisting task after the windy weather subsides.

[0079] The canister is equipped with windproof and airflow guiding units on both sides to block and protect the airflow blowing towards it from both sides of the valley.

[0080] The windproof and flow-guiding unit can be composed of existing windproof and flow-guiding plates by splicing or other connection methods. The specific splicing method and number can be adjusted according to the size of the tank. This embodiment of the invention does not impose specific limitations. Windproof and flow-guiding is prior art and will not be described in detail in this invention. In practical applications, corresponding windproof and flow-guiding components can be used directly.

[0081] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0082] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A safety assessment system for hydropower station dam construction projects, characterized in that, The system includes: It includes several monitoring modules, fitting units, ranging units, calculation units, trajectory acquisition units, analysis units, and safety assessment units; Several monitoring modules are evenly distributed in the upstream and downstream sections of the valley corresponding to the location of the hydropower station dam construction. Each monitoring module is used to obtain the wind speed, wind direction and valley width values ​​at the corresponding monitoring point. The data transmission unit is used to transmit the data acquired by the monitoring module to the fitting unit; The fitting unit is used to obtain fitting data based on the wind speed value and valley width value of each monitoring point, and to process the fitting data to obtain the fitting value between the wind speed and the valley width. The ranging unit is used to measure the first width of the valley corresponding to the location of the hydropower station dam; The calculation unit is used to predict a first predicted wind speed value blowing towards the location of the hydropower station dam based on the fitted value and the first width value; and to predict the predicted swing amplitude value of the canister in the cable crane under wind blowing based on the first predicted wind speed value. The trajectory acquisition unit is used to obtain the running trajectory data of the hoisting tank from the operating system of the cable crane; The analysis unit is used to collect image data within a preset range of the area traversed by the running trajectory, analyze the shortest straight-line distance between the edge of each target in the image data and the running trajectory, obtain a set of shortest straight-line distances, and obtain a safe distance value by taking the minimum value from the elements of the set of shortest straight-line distances. A safety assessment unit is used to compare the predicted swing amplitude value and the safety distance value to obtain a comparison result, and to obtain a safety assessment result based on the comparison result. The monitoring module includes: Anemometer, wind direction meter, distance meter, mounting base, extension support mechanism, mounting platform and power supply equipment; The mounting base is fixed to the mountainside of the valley; the rangefinder is mounted on the mounting base and is used to measure the distance between the mountains on both sides of the valley to obtain the width of the valley; one end of the extension support mechanism is connected to the mounting base, and the other end of the extension support mechanism extends towards the center of the valley and is connected to the installation platform; the wind speed meter and wind direction meter are mounted on the installation platform; the power supply equipment is used to power the electrical equipment in the monitoring module. The analysis unit includes: The first image acquisition module is used to acquire image data in the horizontal direction; The second image acquisition module is used to acquire image data in the vertical direction; The analysis module is used to identify targets in the image data, extract the contour information of the targets based on the identification results, obtain the shortest straight-line distance between the edge of the target and the running trajectory based on the contour information, obtain the shortest straight-line distance set based on the shortest straight-line distance corresponding to each target, and obtain the safe distance value by taking the minimum value from the elements of the shortest straight-line distance set.

2. The safety assessment system for hydropower station dam construction projects according to claim 1, characterized in that, The fitted data includes: N data pairs, each pair including wind speed and valley width; the ratio of wind speed to valley width in each data pair is calculated, resulting in N ratios; the average of these N ratios is then used to obtain the fitted value. The first predicted wind speed value is calculated as follows: V 预测 = First width value * Fitted value, where V 预测 This represents the first predicted wind speed value, and * is a multiplication sign.

3. The safety assessment system for hydropower station dam construction projects according to claim 1, characterized in that, The analysis unit is also used to record the location information of each target and send the target's location information to the security assessment unit; If the predicted swing amplitude is less than the safe distance value, the safety assessment result is safe, and the cable crane continues to operate. If the predicted swing amplitude is greater than or equal to the safe distance value, the safety assessment result is dangerous, and the target corresponding to the safe distance value is set as a dangerous target. Dangerous location information is obtained based on the location information of the dangerous target. Based on the dangerous location information, a control command to move away from the dangerous target is generated and sent to the cable crane's operating system. The cable crane's operating system controls the canister to move away from the dangerous target and retract the canister to the cable crane base based on the control command. Alternatively, the cable crane's operating system controls the canister to move away from the dangerous target and lower the canister to a safe area based on the control command.

4. The safety assessment system for hydropower station dam construction projects according to claim 1, characterized in that, Both the first image acquisition module and the second image acquisition module are installed on the load-bearing trolley of the cable crane.

5. The safety assessment system for hydropower station dam construction projects according to claim 1, characterized in that, If the predicted swing amplitude is less than the safe distance value, the safety assessment result is safe, and the cable crane continues to operate; if the predicted swing amplitude is greater than or equal to the safe distance value, the safety assessment result is dangerous. The safety assessment unit obtains the real-time position of the hoisting can from the cable crane's operating system, and calculates the time T1 required to retrieve the hoisting can to the cable crane base and the time T2 required to lower the hoisting can to the safe area based on the real-time position. The unit compares the values ​​of T1 and T2. If T1 is greater than T2, the hoisting can is lowered to the safe area; if T1 is less than or equal to T2, the hoisting can is retrieved to the cable crane base.

6. The safety assessment system for hydropower station dam construction projects according to claim 1, characterized in that, The system further includes an alarm unit, which is used to issue an alarm when the first predicted wind speed value is greater than a threshold.

7. The safety assessment system for hydropower station dam construction projects according to claim 1, characterized in that, The system further includes a statistics unit and a prediction unit; the statistics unit is used to collect the wind speed value and corresponding time data of each monitoring module, obtain statistical data, obtain training data based on the statistical data, and train a prediction model based on the training data to obtain a wind speed prediction model; the prediction unit is used to predict the wind speed value at a preset time based on the wind speed prediction model.

8. A safety assessment system for hydropower station dam construction projects according to claim 6, characterized in that, The monitoring module is also used to monitor the river surface water level to obtain water level data, and adjust the threshold based on the water level data.

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