Anti-icing method and device for bridge cable

Abstract

The invention relates to the technical field of equipment icing prevention, in particular to an icing prevention method and device for a bridge inhaul cable. The bridge inhaul cable comprises an inhaul cable steel wire, a steel wire sheath, a heat conduction coating and a plurality of resistance wires which are sequentially arranged from inside to outside, wherein the resistance wires are spirally laid on the heat conduction coating. The method comprises the steps of monitoring environment humidity, temperature of water drops in the environment, diameter of the water drops in the environment and surface temperature of the bridge cable; predicting the icing probability of the bridge inhaul cable according to the environment humidity and the surface temperature of the bridge inhaul cable, and predicting the icing form of the bridge inhaul cable according to the water drop temperature and the water drop diameter in the environment; the ice coating forms comprise glaze ice coating, rime ice coating, mixed rime ice coating and snow rime ice coating; under the condition that the predicted icing probability of the bridge inhaul cable exceeds a first preset value and the icing form of the bridge inhaul cable is glaze icing or mixed glaze icing, a resistance wire of the bridge inhaul cable is controlled to act according to a preset mode; the problem that the anti-icing effect is poor can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of equipment anti-icing, and in particular to an anti-icing method and device for bridge cables. Background Art

[0002] In cold seasons, ice and snow on bridge cables will increase their weight and change their stress state, which may cause structural damage or failure. The accumulation of ice on bridge cables will significantly change their original appearance geometry and increase surface roughness, resulting in changes in their aerodynamic characteristics, which may cause abnormal vibrations in the cables and pose a threat to the safety of the bridge structure.

[0003] At present, the anti-icing method for bridge cables is mostly achieved by coating the surface of the bridge cables with special materials. However, the causes of icing are complex. In addition to the surface adhesion ability, it is also related to many factors such as the temperature difference between the cable surface and water droplets in the air, and the roughness of the cable surface due to corrosion. Special coatings alone cannot effectively avoid the occurrence of icing, and the anti-icing effect is poor. Summary of the invention

[0004] Based on this, it is necessary to provide a method and device for preventing icing of bridge cables in response to the above technical problems.

[0005] In a first aspect, the present application provides an anti-icing method for a bridge cable, wherein the bridge cable comprises a cable steel wire, a steel wire sheath, a thermal conductive coating, and a plurality of resistance wires spirally laid on the thermal conductive coating, which are sequentially arranged from the inside to the outside; the method comprises:

[0006] Monitor the ambient humidity, water droplet temperature, water droplet diameter, and surface temperature of bridge cables;

[0007] The probability of icing on bridge cables is predicted based on the ambient humidity and the surface temperature of bridge cables, and the icing form of bridge cables is predicted based on the water drop temperature and water drop diameter in the environment; the icing forms include rime icing, fog icing, mixed rime icing and snow icing;

[0008] When it is predicted that the probability of icing of the bridge cable exceeds a first preset value, and the icing form of the bridge cable is rain rime icing or mixed rime icing, the resistance wire of the bridge cable is controlled to act in a preset manner.

[0009] In one embodiment, the step of controlling the resistance wire of the bridge cable to move in a preset manner includes:

[0010] Obtain the change in ice thickness at a preset point of the bridge cable per unit time;

[0011] Determine the change of ambient humidity per unit time according to the monitored ambient humidity, and predict the ice formation period according to the change of ambient humidity;

[0012] Based on the ice formation cycle and the change in ice thickness, predict the ice thickness at multiple time points within the ice formation cycle;

[0013] In response to the ice form of the bridge cable being rime ice, if it is predicted that the ice thickness exceeds a first preset thickness when the ice formation period ends, the resistance wire is controlled according to a first preset method; the first preset method includes: at a time point when the ice thickness is corresponding to a second preset thickness during the ice period, controlling the resistance wire to operate at a first power until the ice thickness is zero.

[0014] In one embodiment, the step of controlling the resistance wire of the bridge cable to move in a preset manner further includes:

[0015] In response to the fact that the ice coating form of the bridge cable is mixed rime ice coating, if it is predicted that the ice coating thickness exceeds the third preset thickness when the ice coating formation cycle ends, the resistance wire is controlled according to the second preset method; the third preset thickness is less than the second preset thickness; the second preset method includes: at the time point when the ice coating thickness corresponds to the second preset thickness during the ice coating cycle, the resistance wire is controlled to operate at the first power until the ice coating thickness is zero.

[0016] In one embodiment, the method further comprises:

[0017] In response to the ice coating of the bridge cable being rain rime ice or mixed rime ice, if the ice coating thickness exceeds the second preset thickness when the ice formation period is predicted to end, and the temperature difference between the water droplet temperature in the environment and the surface temperature of the bridge cable exceeds the first preset temperature difference, the resistance wire is controlled to operate at the second power to raise the surface temperature of the bridge cable to zero degrees Celsius.

[0018] In one embodiment, the method further comprises:

[0019] When the ice formation period starts, obtain the ambient wind speed and ambient wind direction at the bridge cable location;

[0020] Create an association relationship model, and train the association relationship model based on historical data to obtain a trained association relationship model; the historical data includes the change in ice thickness corresponding to the actual ice formation cycle in multiple historical time periods, the ambient wind speed, the ambient wind direction, and the ice shape of the bridge cable at the end of the ice formation cycle;

[0021] Substitute the currently acquired change in ice thickness, ambient wind speed, and ambient wind direction into the trained association model to determine the predicted ice shape of the bridge cable when the ice cycle ends;

[0022] In response to the predicted ice-covered shape including features of a preset ice-covered shape, a warning prompt message is output; the features of the preset ice-covered shape include ice hanging features of a preset length and a preset distribution density.

[0023] In one embodiment, the method further comprises:

[0024] When the diameter of the water droplets in the environment includes water droplets in a first preset diameter range and the temperature of the water droplets in the environment is in a preset temperature range, it is determined that the icing state is rime icing;

[0025] When the diameter of water droplets in the environment includes water droplets in a first preset diameter range and a second preset diameter range, and the temperature of the water droplets in the environment is within the preset temperature range, it is determined that the icing state is mixed rime icing.

[0026] In a second aspect, the present application provides an anti-icing device for a bridge cable, wherein the bridge cable comprises a cable steel wire, a steel wire sheath, a thermal conductive coating, and a plurality of resistance wires spirally laid on the thermal conductive coating, which are sequentially arranged from the inside to the outside; the device comprises:

[0027] A monitoring module, used to monitor the ambient humidity, the temperature of water droplets in the environment, the diameter of water droplets in the environment, and the surface temperature of the bridge cables;

[0028] A prediction module is used to predict the probability of icing of the bridge cable according to the ambient humidity and the surface temperature of the bridge cable, and to predict the icing form of the bridge cable according to the water drop temperature and the water drop diameter in the environment; the icing forms include rime icing, fog icing, mixed rime icing and snow icing;

[0029] The control module is used to control the resistance wire of the bridge cable to act in a preset manner when it is predicted that the probability of icing of the bridge cable exceeds a first preset value and the icing form of the bridge cable is rain rime icing or mixed rime icing.

[0030] In a third aspect, the present application provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the steps of the method provided in the first aspect of the present application when executing the computer program.

[0031] In a fourth aspect, a computer program is stored thereon, and when the computer program is executed by a processor, the steps of the method provided in the first aspect of the present application are implemented.

[0032] The fifth aspect includes a computer program which, when executed by a processor, implements the steps of the method provided in the first aspect of the present application.

[0033] The above-mentioned anti-icing method and device for bridge cables can conduct heat through the thermally conductive coating coated on the outer surface of the steel wire sheath, and heat through the resistance wire spirally laid on the thermally conductive coating; when the surface temperature of the bridge cable is low, water droplets in the environment are easy to stick to the surface of the bridge cable and exchange heat, so the probability of icing is judged by monitoring the ambient humidity and the surface temperature of the bridge cable; and according to the temperature of water droplets in different environments, water droplets may condense into snowflakes or continue to adhere to the surface of the bridge cable in the form of water droplets, and when the diameter of the water droplets in the environment is large and in the form of snowflakes, rime icing is likely to occur, and when the diameter of the water droplets in the environment is large and in the form of water droplets, it is easy to produce icing. It is easy to produce rime icing when raindrops are small in diameter and are water droplets in the environment, and it is easy to produce fog rime icing when the diameter of the water droplets is different or the temperature of the water droplets changes rapidly, and mixed rime icing may also be produced. Therefore, the icing form can be directly predicted according to the temperature of the water droplets and the water droplets in the environment; when the predicted icing probability exceeds the first preset value, since rime icing and mixed rime icing have a greater impact on the cable, wind-induced vibration and ice hanging falling off are likely to occur, and thus the resistance wire is heated in a preset manner to remove the surface ice, and in other cases the resistance wire does not work for energy saving; this enables the present application to effectively solve the problem of poor anti-icing effect currently caused by the use of special material coatings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A flowchart of steps for controlling the action of a resistance wire based on ice coating morphology in one embodiment;

[0036] Figure 2 A flowchart of steps for controlling a resistance wire to act in a first preset manner in one embodiment;

[0037] Figure 3 A flowchart of the steps of predicting ice shape based on wind speed and wind direction in one embodiment;

[0038] Figure 4 A flowchart of steps for determining ice coverage status in one embodiment;

[0039] Figure 5 It is a structural block diagram of an anti-icing device for a bridge cable in one embodiment;

[0040] Figure 6 The figure is a schematic diagram of the structure of a bridge cable in one embodiment. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In an exemplary embodiment, the present application provides an anti-icing method for a bridge cable, wherein the bridge cable includes a cable wire, a wire sheath, a thermal conductive coating, and a plurality of resistance wires spirally laid on the thermal conductive coating, which are sequentially arranged from the inside to the outside; Figure 1 As shown, the method includes the following steps S12 to S16. Among them:

[0044] S12 monitors the ambient humidity, the temperature of water droplets in the environment, the diameter of water droplets in the environment, and the surface temperature of the bridge cables.

[0045] Specifically, the formation of rime, rime, mixed rime and snow rime is closely related to the ambient humidity, the temperature of water droplets in the environment, the diameter of water droplets in the environment and the surface temperature of bridge cables. Different ambient humidity indicates different distribution density of water droplets in the environment. Usually, the lowest ambient humidity for rainy and snowy days can be above 80%, and the ambient humidity also affects the icing on the surface of bridge cables. When the ambient humidity is low, the bridge cable surface will form rime or frost with a lower thickness as much as possible. The different temperatures of water droplets in the environment also determine whether water droplets in the environment will condense into snow before falling on the surface of bridge cables. For bridge cables, the rime, which has the greatest impact, often occurs when the temperature of water droplets in the environment is above zero, while the ambient temperature (resulting in the surface temperature of bridge cables) is below zero. The temperature of water droplets in mixed rime is even lower, and it is a mixture of rain and snow.

[0046] Furthermore, the diameter of water droplets in the environment also directly affects the ice morphology on the surface of the bridge cable. When the diameter of water droplets in the environment is small, it appears in the air in the form of fog, while when the diameter of water droplets in the environment is large, it appears in the form of rain and snow. In addition, the temperature of the bridge cable surface directly determines the ice coverage of the bridge cable. When the surface temperature of the bridge cable is too low (usually below zero degrees), as the temperature drops, water droplets in the environment fall on the surface of the bridge cable. It is easy to exchange heat with the surface of the bridge cable, thereby condensing and adhering, resulting in the generation of ice. Therefore, the ice morphology can be effectively judged by the environmental humidity, the temperature of water droplets in the environment, the diameter of water droplets in the environment, and the surface temperature of the bridge cable.

[0047] Specifically, the ambient humidity may be the average ambient humidity of the area where the bridge cables are located.

[0048] S14, predicting the probability of icing of the bridge cable according to the ambient humidity and the surface temperature of the bridge cable, and predicting the icing form of the bridge cable according to the water droplet temperature and the water droplet diameter in the environment; the icing forms include rain rime icing, fog rime icing, mixed rime icing and snow rime icing.

[0049] Specifically, the lower the surface temperature of the bridge cable is, the greater the possibility of heat exchange with water droplets in the environment. Due to the difference in specific heat capacity, the temperature of water droplets in the environment is usually higher than that of the bridge cable.

[0050] Furthermore, if the humidity in the environment is too low, it is difficult for enough water droplets to collide with the bridge cables. Therefore, icing is usually more obvious when the humidity is 80%. Therefore, the probability of icing is predicted by the surface temperature of the bridge cables and the ambient humidity.

[0051] Furthermore, the above fully describes the influence of the water droplet temperature and the water droplet diameter on the ice morphology. In combination with the ice morphology probability, different ice morphology treatments can be performed for different ice morphologies.

[0052] S16, when it is predicted that the probability of icing of the bridge cable exceeds a first preset value, and the icing form of the bridge cable is rain rime icing or mixed rime icing, controlling the resistance wire of the bridge cable to operate in a preset manner.

[0053] Specifically, the ice form of bridge cables is crucial to the structural strength of the bridge cables and the safety of pedestrians and vehicles below. Mixed rime icing has a greater impact on the wind-induced vibration of bridge cables, easily changes their wind load, and is heavy, which can easily cause a huge impact on pedestrians and vehicles below when it falls off. Rain rime icing is the second most common icing type, while fog rime and snow rime icing are lighter in weight, have less adhesion, and are easy to fall off, so they have less impact on the bridge.

[0054] Based on the above, when the ice is judged to be rain rime ice or mixed rime ice, the resistance wire can be heated in a preset manner to produce a de-icing effect. For rime and snow rime, no treatment is performed for the purpose of energy saving.

[0055] An anti-icing method for bridge cables provided in an embodiment of the present application can conduct heat through a thermally conductive coating applied to the outer surface of a steel wire sheath, and heat through a resistance wire spirally laid on the thermally conductive coating; when the surface temperature of the bridge cable is low, water droplets in the environment are likely to stick to the surface of the bridge cable and exchange heat, so the probability of icing is determined by monitoring the ambient humidity and the surface temperature of the bridge cable; and according to the temperature of water droplets in different environments, water droplets may condense into snowflakes or continue to adhere to the surface of the bridge cable in the form of water droplets, and when the diameter of the water droplets in the environment is large and they are snowflakes, icing is likely to occur; and when the diameter of the water droplets in the environment is large and they are water droplets, rime icing is likely to occur. Rime icing is easily generated in rainy weather, and fog rime icing is easily generated in an environment where the diameter of water droplets is small and they are water droplets. As the diameters of water droplets vary or the temperature of water droplets changes rapidly, mixed rime icing may also be generated. Therefore, the icing form can be directly predicted based on the temperature of water droplets and water droplets in the environment. When the predicted icing probability exceeds the first preset value, since rain rime icing and mixed rime icing have a greater impact on the cable, wind-induced vibration and ice falling off are easily generated. Therefore, the resistance wire is heated in a preset manner to remove surface ice. In other cases, the resistance wire does not work to save energy. This allows the present application to effectively solve the problem of poor anti-icing effect caused by the current use of special material coatings.

[0056] In an exemplary embodiment, Figure 2 As shown, the steps of controlling the resistance wire of the bridge cable to act in a preset manner include the following steps S162 to S168:

[0057] S162, obtaining the change in ice thickness at a preset point of the bridge cable per unit time.

[0058] Specifically, the change in ice thickness can be used to predict the development speed of ice thickness.

[0059] Furthermore, the preset point may be the upper half of the bridge cable and close to one end of the bridge deck.

[0060] S164, determining the change of the ambient humidity per unit time according to the monitored ambient humidity, and predicting the ice formation period according to the change of the ambient humidity.

[0061] Specifically, the icing cycle is used to indicate the entire time period from the start to the end of the icing process.

[0062] S166: Based on the ice formation cycle and the change in ice thickness, predict the ice thickness at multiple time points within the ice formation cycle.

[0063] S168, in response to the ice coating of the bridge cable being rime ice coating, if it is predicted that the ice coating thickness exceeds a first preset thickness when the ice coating formation cycle ends, the resistance wire is controlled according to a first preset method; the first preset method includes: at a time point corresponding to a second preset thickness during the ice coating cycle, the resistance wire is controlled to operate at a first power until the ice coating thickness is zero.

[0064] Specifically, the first preset thickness can be used to indicate the thickness of ice that poses a threat to pedestrians below, or can be the thickness of ice that produces wind-induced vibrations. It is set according to needs during the specific implementation process and is not specifically limited here.

[0065] Furthermore, when it is predicted that the ice will eventually develop to the first preset thickness, heating and de-icing are performed in advance to cause the ice to fall off.

[0066] Furthermore, the time point corresponding to the second preset thickness includes a thickness at which the detached broken ice will not cause any impact when heating and deicing is performed. It can be set according to specific circumstances and is not specifically limited here.

[0067] In an exemplary embodiment, the step of controlling the resistance wire of the bridge cable to act in a preset manner further includes:

[0068] In response to the fact that the ice coating form of the bridge cable is mixed rime ice coating, if it is predicted that the ice coating thickness exceeds the third preset thickness when the ice coating formation cycle ends, the resistance wire is controlled according to the second preset method; the third preset thickness is less than the second preset thickness; the second preset method includes: at the time point when the ice coating thickness corresponds to the second preset thickness during the ice coating cycle, the resistance wire is controlled to operate at the first power until the ice coating thickness is zero.

[0069] Specifically, since the development trend, weight and density of mixed rime icing are higher than those of rain rime icing, the thickness of mixed rime icing needs to be controlled lower than that of rain rime icing, so that the impact of mixed rime icing on bridge cables is reduced.

[0070] Specifically, the first power may be a maximum power that controls the heating of the resistance wire and does not burn the thermal conductive coating.

[0071] In one embodiment, the method further comprises:

[0072] In response to the ice coating of the bridge cable being rain rime ice or mixed rime ice, if the ice coating thickness exceeds the second preset thickness when the ice formation period is predicted to end, and the temperature difference between the water droplet temperature in the environment and the surface temperature of the bridge cable exceeds the first preset temperature difference, the resistance wire is controlled to operate at the second power to raise the surface temperature of the bridge cable to zero degrees Celsius.

[0073] Specifically, when the temperature difference between the water droplet temperature in the environment and the surface temperature of the bridge cable exceeds the first preset temperature difference, the rate of heat exchange between the water droplets in the air and the bridge cable is accelerated. Therefore, in order to prevent the resistance wire from heating up too slowly and causing the heating time to actually be later than the time point corresponding to the second preset thickness, the second power is used to insulate the bridge cable to avoid uncontrolled ice thickness.

[0074] In an exemplary embodiment, Figure 3 As shown, the method further includes the following steps S22 to S28.

[0075] in:

[0076] S22, when the ice formation period starts, obtaining the ambient wind speed and ambient wind direction of the bridge cable location environment.

[0077] Specifically, the ambient wind speed and the ambient wind direction will directly affect the shape of ice covering the bridge cables. When the ambient wind speed is greater than the preset value and the ambient wind direction has a vertical component with the bridge cables, the ice covering the bridge cables will be formed against the wind (at this time, the direction of the ice hanging will form a certain angle with the ground), and when the ambient wind speed is greater than the preset value and the ambient wind direction has a parallel component with the bridge cables, the ice covering the bridge cables will be formed along the extension direction of the bridge cables (at this time, the length of the ice hanging will be reduced, and the ice covering the bridge cables will be closer to a circle). Therefore, the ambient wind speed and the ambient wind direction will have a significant change on the shape of ice covering the bridge cables, which will in turn affect the wind attack angle, and will also affect the actual state of ice hanging falling off (the actual state includes thickness and shape), causing the original prediction of the impact of ice covering the bridge cables to change.

[0078] S24, creating an association relationship model, and training the association relationship model based on historical data to obtain a trained association relationship model; the historical data includes the change in ice thickness corresponding to the start of the ice formation cycle in multiple historical time periods, the ambient wind speed, the ambient wind direction, and the ice shape of the bridge cable at the end of the ice formation cycle.

[0079] Specifically, the historical data may also include historical data of other bridges having the same structure as the target bridge.

[0080] S26, substituting the currently acquired change in ice thickness, ambient wind speed, and ambient wind direction into the trained association model to determine the predicted ice shape of the bridge cable when the ice cycle ends.

[0081] S28, in response to the predicted ice-covering shape including features of a preset ice-covering shape, outputting warning prompt information; the features of the preset ice-covering shape include ice hanging features of a preset length and a preset distribution density.

[0082] Specifically, in the process of analyzing the predicted ice-covered shape, the ice-covered features are extracted and compared with the features of the preset ice-covered shape, so as to analyze the impact of the predicted ice-covered shape on pedestrians. Since icicles of a certain distribution density and length will have an impact on pedestrians, the comparative analysis can effectively avoid the harm caused by ice-covered shapes under the influence of the current wind speed and wind direction.

[0083] Furthermore, the early warning prompt information is used to instruct the resistance wire to operate at a second power to increase the surface temperature of the bridge cable to zero degrees Celsius.

[0084] In an exemplary embodiment, Figure 4 As shown, the method further includes the following steps S32 to S34. Among them:

[0085] S32: When the diameter of water droplets in the environment includes water droplets within a first preset diameter range and the temperature of water droplets in the environment is within a preset temperature range, determine that the icing state is rime icing.

[0086] Exemplarily, the first preset diameter range may be 0.5 to 6 mm.

[0087] S34, when the diameter of water droplets in the environment includes water droplets in a first preset diameter range and a second preset diameter range, and the temperature of the water droplets in the environment is in a preset temperature range, determining that the icing state is mixed rime icing.

[0088] Exemplarily, the second preset diameter range may be 1 to 100 micrometers.

[0089] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indications of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0090] Based on the same inventive concept, the embodiment of the present application also provides an anti-icing device for a bridge cable for implementing the anti-icing method for a bridge cable involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the anti-icing device for a bridge cable provided below can refer to the limitations of the anti-icing method for a bridge cable above, and will not be repeated here.

[0091] Second, as Figure 5 As shown, the present application also provides an anti-icing device 500 for a bridge cable, the bridge cable comprising a cable steel wire, a steel wire sheath, a thermal conductive coating, and a plurality of resistance wires spirally laid on the thermal conductive coating arranged in sequence from the inside to the outside; the device comprises:

[0092] Monitoring module 501, used to monitor the ambient humidity, the temperature of water droplets in the environment, the diameter of water droplets in the environment, and the surface temperature of the bridge cables;

[0093] Prediction module 502, used to predict the probability of ice covering the bridge cable according to the ambient humidity and the surface temperature of the bridge cable, and predict the ice covering form of the bridge cable according to the water drop temperature and the water drop diameter in the environment; the ice covering form includes rain rime icing, fog rime icing, mixed rime icing and snow rime icing;

[0094] The control module 503 is used to control the resistance wire of the bridge cable to act in a preset manner when it is predicted that the probability of icing of the bridge cable exceeds a first preset value and the icing form of the bridge cable is rain rime icing or mixed rime icing.

[0095] Thirdly, Figure 6 As shown, the present application provides a bridge cable, comprising a cable steel wire 1 (bridge cable steel wire), a steel wire sheath 2, a thermal conductive coating 3 (a high-efficiency heat transfer material spray coating), and a plurality of resistance wires 4 (resistance heating spiral wires) spirally laid on the thermal conductive coating, which are arranged in sequence from the inside to the outside.

[0096] Wherein, the steel wire sheath 1 can be made of high-density polyethylene (HDPE) sheath;

[0097] Specifically, the plurality of resistance wires 4 may include two resistance wires that are double-helix-wound (not shown in the figure), three resistance wires that are helically-wound (not shown in the figure), or four resistance wires that are helically-wound.

[0098] Specifically, the thickness of the thermal conductive coating may be 50 to 100 micrometers.

[0099] In a fourth aspect, the present application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the anti-icing method for bridge cables as described above are implemented.

[0100] In a fifth aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the anti-icing method for bridge cables as described above.

[0101] In a sixth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the anti-icing method for bridge cables as described above.

[0102] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0103] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for preventing ice coating on bridge cables, characterized in that: The bridge cable comprises a cable steel wire, a steel wire sheath, a thermal conductive coating and a plurality of resistance wires spirally laid on the thermal conductive coating arranged in sequence from the inside to the outside; the method comprises: Monitoring ambient humidity, ambient water drop temperature, ambient water drop diameter, and surface temperature of the bridge cable; Predicting the probability of icing of the bridge cable according to the environmental humidity and the surface temperature of the bridge cable, and predicting the icing form of the bridge cable according to the water drop temperature and the water drop diameter in the environment; the icing form includes rime icing, fog icing, mixed rime icing and snow icing; When it is predicted that the probability of icing of the bridge cable exceeds a first preset value, and the icing form of the bridge cable is the rain-rime icing or the mixed rime icing, the resistance wire of the bridge cable is controlled to operate in a preset manner.

2. The method according to claim 1, characterized in that The step of controlling the resistance wire of the bridge cable to act in a preset manner comprises: Obtaining a change in ice thickness at a preset point of the bridge cable per unit time; Determine the change of the ambient humidity per unit time according to the monitored ambient humidity, and predict the ice formation period according to the change of the ambient humidity; Based on the ice formation cycle and the change in ice thickness, predicting the ice thickness at multiple time points within the ice formation cycle; In response to the ice coating form of the bridge cable being the rime ice coating, if it is predicted that the ice coating thickness exceeds a first preset thickness when the ice coating formation cycle ends, the resistance wire is controlled according to a first preset method; the first preset method includes: at a time point in the ice coating cycle when the ice coating thickness is corresponding to a second preset thickness, controlling the resistance wire to operate at a first power until the ice coating thickness is zero.

3. The method according to claim 2, characterized in that The step of controlling the resistance wire of the bridge cable to act in a preset manner also includes: In response to the ice coating form of the bridge cable being the mixed rime ice coating, if it is predicted that the ice coating thickness exceeds a third preset thickness when the ice coating formation cycle ends, the resistance wire is controlled according to a second preset method; the third preset thickness is less than the second preset thickness; the second preset method includes: at a time point during the ice coating cycle when the ice coating thickness is corresponding to the second preset thickness, controlling the resistance wire to operate at a first power until the ice coating thickness is zero.

4. The method according to claim 3, characterized in that The method further comprises: In response to the ice coating form of the bridge cable being the rain rime ice coating or the mixed rime ice coating, if it is predicted that the ice coating thickness exceeds the second preset thickness when the ice coating formation cycle ends, and the temperature difference between the water droplet temperature in the environment and the surface temperature of the bridge cable exceeds the first preset temperature difference, the resistance wire is controlled to operate at the second power to raise the surface temperature of the bridge cable to zero degrees Celsius.

5. The method according to claim 3, characterized in that: The method further comprises: When the ice formation period starts, obtaining the ambient wind speed and ambient wind direction of the bridge cable location environment; Creating an association relationship model, and training the association relationship model based on historical data to obtain a trained association relationship model; the historical data includes the change in ice thickness corresponding to the start of an ice formation cycle in multiple historical time periods, the ambient wind speed, the ambient wind direction, and the ice shape of the bridge cable at the end of an ice formation cycle; Substituting the currently acquired change in ice thickness, the ambient wind speed, and the ambient wind direction into the trained association model to determine the predicted ice shape of the bridge cable when the ice cycle ends; In response to the predicted ice-covering shape including features of a preset ice-covering shape, a warning prompt message is output; the features of the preset ice-covering shape include ice hanging features of a preset length and a preset distribution density.

6. The method according to claim 3, characterized in that: The method further comprises: When the diameter of the water droplets in the environment includes water droplets within a first preset diameter range, and the temperature of the water droplets in the environment is within a preset temperature range, determining that the icing state is rime icing; When the diameter of the water droplets in the environment includes water droplets in the first preset diameter range and the second preset diameter range, and the temperature of the water droplets in the environment is within the preset temperature range, it is determined that the icing state is mixed rime icing.

7. An anti-icing device for bridge cables, characterized in that: The bridge cable comprises a cable steel wire, a steel wire sheath, a thermal conductive coating and a plurality of resistance wires spirally laid on the thermal conductive coating, which are sequentially arranged from the inside to the outside; the device comprises: A monitoring module, used to monitor the ambient humidity, the temperature of water droplets in the environment, the diameter of water droplets in the environment, and the surface temperature of the bridge cable; A prediction module, used for predicting the probability of icing of the bridge cable according to the environmental humidity and the surface temperature of the bridge cable, and predicting the icing form of the bridge cable according to the water drop temperature and the water drop diameter in the environment; the icing form includes rime icing, fog icing, mixed rime icing and snow icing; The control module is used to control the resistance wire of the bridge cable to act in a preset manner when it is predicted that the probability of icing of the bridge cable exceeds a first preset value and the icing form of the bridge cable is the rain rime icing or the mixed rime icing.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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