Maintenance method and maintenance canopy for prestressed large-span concrete simply supported box girder

Abstract

The application discloses a prestressed large-span concrete simply-supported box girder maintenance method and a maintenance rain shed, relates to the technical field of prestressed simply-supported box girder maintenance, and realizes comprehensive and dead-angle-free monitoring of the water content state of the surface of the box girder by arranging color-changing surface water content indication stickers in key areas and periodically collecting images by using multiple industrial cameras. Compared with a traditional sensor, the indication stickers are more flexible to arrange, and the industrial cameras can simultaneously monitor multiple indication stickers in combination with an image processing technology, so that the monitoring range is effectively expanded and the maintenance complexity is reduced.

Description

Technical Field

[0001] This invention relates to the field of prestressed simply supported box girder maintenance technology, and particularly to a method for maintaining prestressed large-span concrete simply supported box girders and a maintenance canopy. Background Technology

[0002] With the continuous development and improvement of modern bridge engineering technology, prestressed concrete simply supported box girders have been widely used in long-span bridge structures due to their excellent mechanical properties and economic advantages. In particular, driven by prestressing technology, the load-bearing capacity and durability of simply supported box girders have been continuously enhanced, and maintenance technology has also undergone a transformation from traditional experience-based maintenance to scientific and intelligent maintenance.

[0003] Currently, the maintenance technology for prestressed simply supported box girders mainly relies on manual inspections, combined with traditional humidity measurement tools and maintenance experience. This is achieved by setting up maintenance canopies and water spray systems to maintain the moisture level of the concrete surface. Some large-scale projects also utilize humidity sensors or environmental monitoring equipment to assist in assessing the effectiveness of maintenance. However, due to the large spans of bridges and the extensive maintenance areas, manual inspections suffer from incomplete monitoring and untimely responses. Traditional sensors, on the other hand, typically have limited coverage and are complex to install and maintain, making it difficult to achieve comprehensive, real-time, multi-area status monitoring. Summary of the Invention

[0004] The main objective of this invention is to propose a maintenance method and maintenance canopy for prestressed large-span concrete simply supported box girders. This aims to solve the technical problems of existing technologies, such as incomplete monitoring and untimely response due to the large span of bridges and the wide maintenance area, and the difficulty in achieving comprehensive and real-time multi-area status monitoring by manual inspection.

[0005] To achieve the above objectives, firstly, this invention proposes a method for curing prestressed long-span simply supported concrete box girders. Multiple color-changing surface moisture indicator stickers are arranged in the target detection area on the surface of the prestressed large-span concrete simply supported box girder; wherein, the moisture indicator stickers show the first color when the surface moisture content is normal, and undergo an irreversible or reversible color change to the second color when the surface tends to dry and reaches a preset risk state. Multiple industrial cameras are installed at fixed positions on the maintenance canopy so that the field of view of each industrial camera covers the corresponding color-changing surface moisture indicator sticker. The industrial camera is controlled to periodically acquire images containing the color-changing surface moisture indicator sticker at preset time intervals; The color state of the region of interest (ROI) of the water content indicator sticker in the acquired image is determined. When it is determined that the main color of the moisture content indicator sticker changes from the first color to the second color, or when most moisture content indicator stickers display the second color, the corresponding monitoring area is determined to enter a dryness warning state. When any monitoring area enters a dryness warning state, the corresponding area inside the maintenance canopy is activated to perform a shading action and block direct sunlight from hitting the corresponding monitoring area, thus carrying out maintenance work.

[0006] In one embodiment, the step of performing a simple color state determination on the region of interest of the moisture content indicator stickers in the acquired image, and determining that the main color of the moisture content indicator stickers changes from the first color to the second color, or that most moisture content indicator stickers display the second color, and then determining that the corresponding monitoring area enters a dryness warning state, further includes: When the surface moisture content of the prestressed large-span concrete simply supported box girder decreases to a point where the evaporation rate is significantly higher than the bleeding rate, the discoloration point of the moisture content indicator sticker is in a critically dry state.

[0007] In one embodiment, the step of determining the color state of the region of interest for the water content indicator sticker in the acquired image includes: The color status of the water content indicator patch in the acquired image is determined by comparing the RGB average value range or the HSV hue dominant value range.

[0008] In one embodiment, the monitoring area includes at least one of the upper surface of the flange plate, the edge of the lower surface of the flange plate, the upper middle part of the outer side of the web plate, and the part of the top plate that is easily exposed to light.

[0009] In one embodiment, after determining that the main color of the moisture content indicator sticker changes from the first color to the second color, or that most moisture content indicator stickers display the second color, the step of determining that the corresponding monitoring area has entered a dryness warning state further includes: It triggers an audible and visual alarm signal.

[0010] In one embodiment, after the step of driving the corresponding area inside the maintenance canopy to perform a shading action and block direct sunlight from hitting the corresponding monitoring area when any monitoring area enters a dryness warning state, and carrying out maintenance work, the method further includes: Once the color of the moisture indicator sticker returns to the first color and remains stable for a preset duration, the electric sunshade mechanism is allowed to gradually or fully open to allow diffused light.

[0011] In one embodiment, after the step of driving the corresponding area inside the maintenance canopy to perform a shading action and block direct sunlight from hitting the corresponding monitoring area when any monitoring area enters a dryness warning state, and carrying out maintenance work, the method further includes: It also includes the step of automatically saving the camera-captured images, trigger time, and shading action execution time to the storage unit each time a dryness warning is triggered, forming a digital archive of dryness warning-shading events for the box girder.

[0012] Based on the same technical concept, in a second aspect, the present invention also proposes a maintenance canopy for performing the prestressed large-span concrete simply supported box girder maintenance method described in the first aspect. The maintenance canopy includes: The main frame of the canopy has a maintenance space inside, and a spray maintenance system facing the maintenance space is installed on the main frame of the canopy. A sunshade mechanism is installed on the top of the main frame of the canopy. The sunshade mechanism can move along the top of the main frame of the canopy so that the maintenance space can switch between a shaded maintenance state and a lighted maintenance state. Multiple industrial cameras, all of which are circumferentially spaced on the main frame of the canopy and all of which are oriented towards the maintenance space; and, An edge controller is communicatively connected to the industrial camera and the sunshade mechanism. The edge controller has a built-in function for executing the prestressed large-span concrete simply supported box girder curing method described in the first aspect, for identifying whether the indicator sticker color has changed from the first color to the second color, and automatically sending a shading drive command to the sunshade mechanism when the dryness warning state is detected.

[0013] In one embodiment, the shading mechanism is at least one of an electric roller blind mechanism, an electric push rod driven flip-up shading panel, and an electric lifting high-reflective shading net.

[0014] In one embodiment, the device further includes an audible and visual alarm and / or a field display terminal connected to the edge controller. The field display terminal is used to display which monitoring areas are currently in a dryness warning state, the indicator sticker image at the time of the most recent trigger, and the current opening and closing degree of the shading mechanism.

[0015] The technical solution of this invention achieves comprehensive and seamless monitoring of the surface moisture content of box girder by deploying color-changing surface moisture indicator stickers in key areas and using multiple industrial cameras for periodic image acquisition. Compared with traditional sensors, the deployment of indicator stickers is more flexible, and the industrial cameras, combined with image processing technology, can monitor multiple indicator stickers simultaneously, effectively expanding the monitoring range and reducing maintenance complexity.

[0016] Furthermore, this embodiment automatically determines the color of the indicator sticker in the acquired image, enabling real-time and accurate identification of the dryness warning status of the concrete surface. In the example above, when the edge controller determines that the indicator sticker color changes from green to yellow, it immediately triggers a dryness warning. This automated judgment mechanism based on visual recognition avoids the subjectivity and lag of manual judgment and overcomes the limitation of traditional humidity sensors' point-based measurements in failing to reflect the overall state of the area. Ultimately, upon identifying the dryness warning status, it can immediately drive the corresponding area within the curing canopy to perform shading actions, blocking direct sunlight. In the example above, when the roof area enters the dryness warning state, the electric sunshade is quickly activated to block sunlight, effectively reducing the evaporation rate of that area. This proactive, localized shading intervention is not available in existing technologies such as manual watering or overall shading solutions. Manual watering may suffer from uneven water control or an inability to respond promptly to localized dryness, while overall shading may affect the normal curing needs of other areas. The solution in this embodiment can precisely intervene in localized dry areas, improving the level of precision in maintenance and the efficiency of resource utilization, thereby effectively preventing early cracking of concrete and ensuring the long-term durability of the box girder. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A flowchart of the prestressed large-span simply supported concrete box girder maintenance method provided by the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the maintenance canopy as an example of the present invention.

[0020] Figure label: 100. Main frame of the canopy; 200. Sunshade mechanism; 300. Industrial camera.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] Please see Figure 1 , Figure 2 This invention proposes a curing method for prestressed long-span simply supported concrete box girders. S100. Multiple color-changing surface moisture indicator stickers are arranged in the target detection area on the surface of the prestressed large-span concrete simply supported box girder; wherein, the moisture indicator stickers present a first color when the surface moisture content is normal, and undergo an irreversible or reversible color change to a second color when the surface tends to dry and reaches a preset risk state. S200. Install multiple industrial cameras at fixed positions on the maintenance canopy, so that the field of view of each industrial camera covers the corresponding color-changing surface moisture indicator sticker. S300: Control the industrial camera to periodically acquire images containing the color-changing surface moisture indicator sticker at preset time intervals; S400: Determine the color status of the region of interest for the water content indicator sticker in the acquired image; S500: When it is determined that the main color of the moisture content indicator sticker changes from the first color to the second color, or when most moisture content indicator stickers display the second color, the corresponding monitoring area is determined to enter the dryness warning state; wherein, the monitoring area is the region of interest of the moisture content indicator sticker.

[0026] S600: When any monitoring area enters a dryness warning state, drive the corresponding area inside the maintenance canopy to perform a shading action and block direct sunlight from hitting the corresponding monitoring area to carry out maintenance work.

[0027] Specifically, multiple color-changing surface moisture indicator patches are strategically placed in the target detection area on the surface of the prestressed long-span simply supported concrete box girder. These patches are designed to display a first color when the surface moisture content is normal, and to irreversibly or reversibly change to a second color when the surface dries and reaches a preset risk state. For example, the patches can be placed on critical areas of the box girder that are susceptible to sunlight or water loss, such as the top slab, web, and flanges. The patches can be applied manually to ensure close contact with the concrete surface. The color change can be based on moisture-sensitive dyes or water-absorbing and swelling materials; as moisture evaporates, the material's structure or chemical state changes, resulting in a visible color change.

[0028] Secondly, multiple industrial cameras are installed at fixed locations within the maintenance canopy, ensuring that the field of view of each camera covers the corresponding color-changing surface moisture indicator sticker. The industrial cameras can be fixedly mounted on the top or side walls of the canopy, and their angles and focal lengths are adjusted to ensure that each indicator sticker is clearly captured by at least one camera. For example, a wide-angle industrial camera can be used to cover a large area, or multiple standard industrial cameras can be used to target different monitoring zones. The industrial cameras are connected to the central processing unit via wired or wireless means to transmit the acquired image data.

[0029] Furthermore, the industrial camera is controlled to periodically acquire images of the color-changing surface moisture indicator sticker at preset time intervals. This preset time interval can be set according to maintenance needs and environmental conditions, for example, acquiring images every few minutes or hours. The acquisition frequency of the industrial camera can be configured via software to achieve automated, periodic image acquisition. The acquired image data is transmitted to the image processing unit for subsequent analysis.

[0030] Subsequently, the color state of the region of interest (ROI) for the water content indicator sticker in the acquired image is determined. This determination process can be implemented using image processing techniques. For example, the color of the indicator sticker in the image can be compared manually with preset first and second color samples. Alternatively, pixel value statistics can be performed on the indicator sticker area in the image, its average color value can be calculated, and compared with a preset color threshold to determine its current color state.

[0031] When the primary color of the moisture content indicator sticker changes from the first color to the second color, or when most of the moisture content indicator stickers display the second color, the corresponding monitoring area is determined to enter a dryness warning state. This judgment logic can be based on the color change of a single indicator sticker, or it can be based on the combined judgment of multiple indicator stickers in the same monitoring area. For example, if multiple indicator stickers are deployed in a monitoring area, and more than half of the indicator stickers display the second color, then the monitoring area is considered to have entered a dryness warning state. This judgment result is used to trigger subsequent maintenance actions.

[0032] Finally, when any monitoring area enters a dryness warning state, the corresponding area within the curing canopy is activated to perform a shading action, blocking direct sunlight from reaching that monitoring area and facilitating curing operations. This shading action can be achieved in several ways. For example, a movable sunshade panel or curtain can be installed inside the curing canopy. Upon receiving a dryness warning signal, a motor drives the sunshade panel or curtain to move above the corresponding monitoring area, thereby blocking direct sunlight. This shading action aims to reduce the evaporation rate of the concrete surface, creating favorable conditions for subsequent water replenishment and curing.

[0033] In this embodiment, by deploying color-changing surface moisture indicator stickers in key areas and using multiple industrial cameras for periodic image acquisition, comprehensive and blind-spot-free monitoring of the moisture content of the box girder surface is achieved. Compared with traditional sensors, the deployment of indicator stickers is more flexible, and the industrial cameras, combined with image processing technology, can monitor multiple indicator stickers simultaneously, effectively expanding the monitoring range and reducing maintenance complexity.

[0034] Furthermore, this embodiment automatically determines the color of the indicator sticker in the acquired image, enabling real-time and accurate identification of the dryness warning status of the concrete surface. In the example above, when the edge controller determines that the indicator sticker color changes from green to yellow, it immediately triggers a dryness warning. This automated judgment mechanism based on visual recognition avoids the subjectivity and lag of manual judgment and overcomes the limitation of traditional humidity sensors' point-based measurements in failing to reflect the overall state of the area. Ultimately, upon identifying the dryness warning status, it can immediately drive the corresponding area within the curing canopy to perform shading actions, blocking direct sunlight. In the example above, when the roof area enters the dryness warning state, the electric sunshade is quickly activated to block sunlight, effectively reducing the evaporation rate of that area. This proactive, localized shading intervention is not available in existing technologies such as manual watering or overall shading solutions. Manual watering may suffer from uneven water control or an inability to respond promptly to localized dryness, while overall shading may affect the normal curing needs of other areas. The solution in this embodiment can precisely intervene in localized dry areas, improving the level of precision in maintenance and the efficiency of resource utilization, thereby effectively preventing early cracking of concrete and ensuring the long-term durability of the box girder.

[0035] In one embodiment, the step of performing a simple color state determination on the region of interest of the moisture content indicator stickers in the acquired image, and determining that the main color of the moisture content indicator stickers changes from the first color to the second color, or that most moisture content indicator stickers display the second color, and then determining that the corresponding monitoring area enters a dryness warning state, further includes: When the surface moisture content of the prestressed large-span concrete simply supported box girder decreases to a point where the evaporation rate is significantly higher than the bleeding rate, the discoloration point of the moisture content indicator sticker is in a critically dry state.

[0036] Specifically, in the initial stage of concrete pouring, internal moisture rises to the surface through bleeding. As time passes and moisture evaporates, when the rate of surface moisture evaporation exceeds the rate of internal moisture replenishment, the concrete surface begins to lose water rapidly, making it prone to plastic shrinkage cracks. Accurately identifying this critical state is crucial for preventing early cracking. This state can be determined by real-time monitoring of the dynamic balance between surface moisture evaporation and internal bleeding, for example, using weighing methods or humidity sensors. The phrase "the color change point of the moisture content indicator is at the critical dry state" refers to the specific color threshold or state at which the moisture content indicator changes from the first color (normal moisture content) to the second color (a preset risk state tending towards dryness). Setting this as the "critical dry state" means that this color change point is precisely calibrated to correspond to the critical moment when the concrete surface moisture content decreases to a point where the evaporation rate significantly exceeds the bleeding rate. Specific calibration methods can be achieved through experiments, such as attaching the moisture content indicator to the surface of a concrete test block under controlled conditions while simultaneously monitoring the water loss rate of the test block and the color change of the indicator, thereby determining the correspondence between the color change and the critical dry state. Another method is to use a combination of chemical materials with different humidity sensitivities, so that the indicator sticker changes color within a specific humidity range, which corresponds to the critical dryness state of the concrete.

[0037] In this embodiment, by precisely correlating the color change point of the moisture content indicator patch with the critical dry state where the surface moisture content of the prestressed large-span simply supported concrete box girder decreases to a level where the evaporation rate significantly exceeds the bleeding rate, the problem of accurately judging the early drying risk of concrete surfaces in traditional curing methods is solved. When the evaporation rate of surface moisture begins to significantly exceed the internal bleeding rate, the surface moisture rapidly decreases. At this point, the moisture content indicator patch will change color due to the interaction between its internal chemical substances and moisture. Since this color change point has been pre-calibrated as an indication of the critical dry state, once the industrial camera captures the color of the moisture content indicator patch changing from the first color to the second color, the system can immediately determine that the corresponding monitoring area has entered a dryness warning state. This precise correspondence ensures that the curing system can identify the risk of early drying of concrete in a timely and accurate manner, thereby driving the corresponding area in the curing canopy to perform shading action at the optimal time to block direct sunlight, effectively preventing plastic shrinkage cracks on the concrete surface due to rapid water loss, and significantly improving the accuracy and effectiveness of curing.

[0038] In one embodiment, the step of determining the color state of the region of interest for the water content indicator sticker in the acquired image includes: The color status of the water content indicator patch in the acquired image is determined by comparing the RGB average value range or the HSV hue dominant value range.

[0039] Specifically, RGB (Red, Green, Blue) is a common color model that represents colors through different intensities of the three primary colors: red, green, and blue. In image processing, for the region of interest (ROI) of a water-containing indicator sticker, the average value of the R, G, and B components of all pixels within that region can be calculated. The calculated average value forms a three-dimensional vector representing the average color of that region. By pre-setting the numerical ranges of the first and second colors in the RGB color space, the calculated average RGB value is compared with these preset ranges to determine the current color state of the water-containing indicator sticker. For example, a cube or ellipsoidal region can be defined to represent a certain color; when the average RGB value falls within this region, it is considered a match. HSV (Hue, Saturation, Value) is another color model, where hue describes the type of color (e.g., red, yellow, blue), saturation describes the purity of the color, and value describes the brightness of the color. The dominant hue value refers to the hue value that appears most frequently or dominates within the ROI of the water-containing indicator sticker. By performing a hue histogram analysis on the pixels in the region, the hue value corresponding to the peak can be identified as the dominant hue. Then, this dominant hue value is compared with the preset hue value ranges of a first and second color. This method can, to some extent, reduce the impact of changes in light intensity and saturation on color judgment because hue is relatively stable.

[0040] In this embodiment, by introducing RGB average value interval comparison or HSV dominant hue value interval comparison, the color state of the region of interest (ROI) of the water content indicator sticker in the acquired image is determined, thereby overcoming the limitations of simple color judgment. When the industrial camera periodically acquires images containing the water content indicator sticker, the edge controller or image processing unit performs refined color analysis on the preset ROI of the water content indicator sticker in the image. By calculating the average RGB value or dominant HSV hue value of this region and accurately comparing it with the pre-calibrated numerical intervals of the first and second colors, the color change of the water content indicator sticker can be objectively and quantitatively identified. This judgment method based on numerical interval comparison avoids errors from subjective judgment and effectively addresses color deviations that may be caused by factors such as ambient light and camera white balance, ensuring the accuracy and robustness of color state judgment. When the judgment result shows that the color of the water content indicator sticker changes from the first color to the second color, the system can reliably determine that the corresponding monitoring area has entered a dryness warning state, and then promptly drive the corresponding area in the maintenance canopy to perform shading actions and block direct sunlight for maintenance operations. The color judgment mechanism exemplified in this embodiment enables the entire curing method to respond more sensitively and accurately to the drying trend of the concrete surface, thereby ensuring the curing quality of prestressed large-span simply supported concrete box girders.

[0041] In one embodiment, the monitoring area includes at least one of the upper surface of the flange plate, the edge of the lower surface of the flange plate, the upper middle part of the outer side of the web plate, and the part of the top plate that is easily exposed to light.

[0042] Specifically, the monitoring zone refers to a specific area on the surface of a prestressed, long-span, simply supported concrete box girder, used for placing color-changing surface moisture indicator stickers and conducting focused monitoring. These areas are typically determined based on factors such as structural characteristics, environmental exposure conditions, and concrete drying sensitivity, aiming to accurately reflect the moisture content of different parts of the box girder. For example, the monitoring zone can be a rectangular area or an irregular area divided according to the geometry of the box girder. The upper surface of the flange plate is the horizontal surface of the box girder structure directly exposed to the atmospheric environment, characterized by its susceptibility to direct sunlight, wind, and changes in ambient temperature. The rate of concrete moisture evaporation in this area is usually high, making it one of the sensitive areas for early drying cracking of concrete. For example, in high temperatures or strong winds during summer, the rate of moisture loss from the upper surface of the flange plate will significantly accelerate. The lower edge of the flange plate refers to the area where the flange plate connects to the web plate or its free edge. Although this area is not directly exposed to direct sunlight, it may be subject to lateral wind blowing, creating local airflow that accelerates moisture evaporation. Furthermore, due to its geometric characteristics, moisture may not easily accumulate here, resulting in a higher risk of drying than other shaded areas. The upper-middle part of the outer side of the web is the vertical side of the box girder, which is usually large and exposed to sunlight at different times of the day. The concrete in this area heats up when exposed to sunlight, accelerating moisture evaporation; at the same time, the vertical surface is also susceptible to wind, leading to rapid moisture loss. For example, in the afternoon, the upper-middle part of the outer side of the western web may be exposed to sunlight for extended periods, facing a higher risk of drying. Sun-prone areas on the top slab specifically refer to areas on the top of the box girder that are more likely to be exposed to direct sunlight for extended periods or at high intensity due to their orientation, slope, or surrounding environmental shading. The concrete surface temperature in these areas rises rapidly, resulting in a much higher rate of moisture evaporation than other areas, making them high-risk drying zones that require special attention during the early curing of concrete. Examples include the middle of the top slab or the south-facing (Northern Hemisphere) sloping portion.

[0043] In this embodiment, by precisely defining the monitoring area as at least one of the following: the upper surface of the flange plate, the lower edge of the flange plate, the upper-middle part of the outer side of the web plate, and the sun-exposed part of the top plate of the prestressed large-span simply supported concrete box girder, the entire curing method can more specifically identify and respond to drying risks. In the above method, color-changing surface moisture indicator stickers are placed in these specific areas identified as high-risk. When the moisture indicator stickers in these key areas change color due to surface moisture evaporation, industrial cameras can capture these changes in a timely manner. Subsequently, by judging the color state of the image, the system can accurately determine whether the corresponding monitoring area has entered a drying warning state. This precise monitoring of high-risk areas ensures that the shading action in the corresponding area within the curing canopy can be triggered in a timely and accurate manner, thereby blocking direct sunlight, effectively supplementing curing, avoiding misjudgments or delayed responses caused by drying in non-critical areas, and significantly improving the accuracy and efficiency of curing. By focusing on these areas susceptible to drying, this solution can more effectively protect concrete structures, ensuring they receive sufficient moisture during the early curing stages, thereby guaranteeing the strength and durability of the concrete.

[0044] In one embodiment, after determining that the main color of the moisture content indicator sticker changes from the first color to the second color, or that most moisture content indicator stickers display the second color, the step of determining that the corresponding monitoring area has entered a dryness warning state further includes: It triggers an audible and visual alarm signal.

[0045] Specifically, audible alarm signals can be implemented by playing preset alarm tones or voice prompts through buzzers or speakers to alert on-site personnel. Visual alarm signals can be implemented through flashing warning lights, text or graphic prompts on LED displays, or by changing the color of ambient lighting to provide a direct visual warning. The purpose of these alarm signals is to promptly inform on-site management personnel or relevant operators so that they can respond quickly and take necessary follow-up actions.

[0046] In this embodiment, when it is determined that the main color of the moisture content indicator sticker changes from the first color to the second color, or that most moisture content indicator stickers display the second color, thus indicating that the corresponding monitoring area has entered a dryness warning state, in addition to driving the corresponding area within the maintenance canopy to perform shading action and block direct sunlight for maintenance work, an audible and visual alarm signal will also be issued simultaneously. This linkage mechanism ensures that on-site operators can immediately receive the warning information when automated maintenance measures are initiated. Through dual warnings of sound and vision, the limitations of purely automated systems in information transmission can be effectively compensated for, enabling operators to intervene in a timely manner to conduct on-site verification, supplementary maintenance, or recording, thereby forming a human-machine collaborative maintenance management model and further improving the reliability and safety of the maintenance process.

[0047] In one embodiment, after the step of driving the corresponding area inside the maintenance canopy to perform a shading action and block direct sunlight from hitting the corresponding monitoring area when any monitoring area enters a dryness warning state, and carrying out maintenance work, the method further includes: Once the color of the moisture indicator sticker returns to the first color and remains stable for a preset duration, the electric sunshade mechanism is allowed to gradually or fully open to allow diffused light.

[0048] Specifically, the color of the moisture content indicator sticker returning to the first color means that after sufficient moisture has been regained on the surface of the prestressed long-span simply supported concrete box girder, the sticker changes from the second color (dryness warning state) back to the first color (normal moisture content state). This indicates that the concrete surface is no longer in a critically dry state, and the moisture conditions have improved. This color change can be reversible, for example, by absorbing moisture from the environment or by spraying moisture during curing. The preset stabilization time refers to the requirement that the moisture content indicator sticker maintain this state for a preset period of time after returning to the first color. This aims to avoid misjudging that the curing state has been fully restored due to short-term moisture fluctuations, ensuring the true stability of the concrete surface moisture content, and thus preventing the risk of secondary drying caused by premature removal of the shading. This time can be set according to the concrete type, environmental conditions, and curing requirements; for example, it can be set from several minutes to several hours. Allowing the electric shading mechanism to open gradually or fully means that after confirming that the concrete surface moisture content has been stably restored, the control system sends a command to the electric shading mechanism to remove the shading. Gradual opening can refer to increasing the light-transmitting area in stages, such as by controlling the degree of roll-up of the blinds or rotating the angle of the sunshade; full opening means completely restoring the environment to allow diffused light to enter. This operating method provides flexibility, allowing for fine-tuning according to actual needs and ambient lighting conditions. Allowing diffused light means that the curing space is no longer exposed to direct sunlight, but still receives diffused light from the sky or surrounding environment. This state helps maintain suitable temperature and humidity within the curing space, while avoiding localized overheating and rapid moisture evaporation that can occur with direct sunlight, providing a gentle curing environment for the concrete.

[0049] In this embodiment, the automation problem of automating the removal of shading is solved by establishing a closed-loop curing environment control mechanism. When the surface moisture indicator of the prestressed large-span simply supported concrete box girder turns a second color due to dryness, triggering the shading action, the curing operation continues. As curing progresses, the surface moisture conditions of the concrete improve, and the color of the moisture indicator returns from the second color to the first color. To ensure this return is stable and reliable, the system further monitors and requires the moisture indicator to maintain the first color for a preset stable duration. Once this condition is met, it indicates that the concrete surface has stably moved away from the dryness warning state. At this point, the system automatically sends a command to the electric shading mechanism, allowing it to gradually or fully open, transitioning the curing space from a completely shaded state to a state that allows diffused light. This mechanism ensures the timely removal of shading measures, avoids unnecessary excessive shading, optimizes the curing environment, allows the concrete to hydrate under suitable light and humidity conditions, and improves the intelligence and efficiency of curing.

[0050] In one embodiment, after the step of driving the corresponding area inside the maintenance canopy to perform a shading action and block direct sunlight from hitting the corresponding monitoring area when any monitoring area enters a dryness warning state, and carrying out maintenance work, the method further includes: It also includes the step of automatically saving the camera-captured images, trigger time, and shading action execution time to the storage unit each time a dryness warning is triggered, forming a digital archive of dryness warning-shading events for the box girder.

[0051] Specifically, camera image acquisition refers to the image data automatically captured and recorded by industrial cameras when the system determines that a monitored area has entered a dryness warning state. These images can intuitively reflect the color status of the moisture content indicator stickers and the actual condition of the surrounding concrete surface, providing visual evidence for subsequent analysis. This can be achieved by storing the images in a standard format (e.g., JPEG or PNG) and embedding metadata such as timestamps, camera IDs, and monitoring area information; or by storing the raw pixel data stream after compression to save storage space and facilitate transmission. The trigger time refers to the precise point in time when the system determines that any monitored area has entered a dryness warning state. This time point is the core time marker of the event and is crucial for event tracing and analysis. This can be achieved by recording a timestamp accurate to the second or millisecond using the system clock and saving it along with date information; or by using structured time data containing detailed information such as date, hour, minute, and second, which can be associated with geographical location information or monitoring point numbers. The shading action execution time refers to the start time, duration, or end time of the shading action performed in the corresponding area within the maintenance canopy. This time record documents the system's response to dryness warnings and is crucial data for assessing the timeliness and effectiveness of maintenance measures. It can be implemented by recording the start and end times of the shading mechanism's action, as well as the time of subsequent shading removal; alternatively, it can record the duration of the shading action or the start and end times of each stage in a phased shading process. The storage unit refers to the hardware device or system used to persistently store data such as camera-captured images, trigger times, and shading action execution times. This unit ensures data integrity and accessibility. It can be implemented as a local industrial-grade hard disk drive, solid-state drive, or embedded memory directly connected to the edge controller; or it can be a network-connected storage device (such as Network Attached Storage, NAS) or a remote cloud storage service for centralized data management and backup. The dryness warning-shading event digital archive refers to the structured organization and storage of relevant data from each dryness warning trigger and subsequent shading actions, forming a collection of electronic records that can be queried, analyzed, and traced. This archive is key to the systematic management of the maintenance process. The implementation can be a relational database (such as MySQL or PostgreSQL) or a non-relational database (such as MongoDB), with each record containing fields such as event ID, timestamp, image storage path, shading status, and duration; or it can be a folder structure organized by date, box girder ID, or monitoring area, with each folder containing event log files and corresponding image files.

[0052] In this embodiment, based on the above-mentioned curing method for prestressed large-span simply supported concrete box girders, a systematic data recording mechanism is further used to improve the intelligence and traceability of the curing process. When the industrial camera periodically acquires images and determines that the main color of the moisture content indicator sticker changes from the first color to the second color, thus indicating that the corresponding monitoring area has entered a dryness warning state, the system will not only drive the corresponding area in the curing canopy to perform a shading action, but also simultaneously trigger the data recording process.

[0053] The system immediately saves the camera images captured when the dryness warning is triggered, accurately records the trigger time, and records the execution time of subsequent shading actions. All this key data is automatically saved to a preset storage unit and forms a digital archive of dryness warning-shading events for the box girder according to a predetermined structure. In this way, every dryness warning event and its corresponding system response are completely recorded, making the maintenance process no longer an isolated, instantaneous operation, but forming a traceable and analyzable historical data chain. This allows maintenance managers to evaluate the maintenance effect based on real data, identify areas and time patterns prone to dryness, and provide a scientific basis for adjusting and optimizing subsequent maintenance strategies.

[0054] Based on the same technical concept, in a second aspect, the present invention also proposes a maintenance canopy for performing the prestressed large-span concrete simply supported box girder maintenance method described in the first aspect. The maintenance canopy includes: The main frame 100 of the canopy has a maintenance space inside, and a spray maintenance system facing the maintenance space is installed on the main frame 100 of the canopy. A sunshade mechanism 200 is installed on the top of the main frame 100 of the canopy. The sunshade mechanism 200 can move along the top of the main frame 100 of the canopy so that the maintenance space can switch between a shaded maintenance state and a lighted maintenance state. Multiple industrial cameras 300 are distributed circumferentially on the main frame 100 of the canopy, and all industrial cameras 300 are positioned facing the maintenance space; and, An edge controller is communicatively connected to the industrial camera 300 and the sunshade mechanism 200. The edge controller has a built-in function for executing the prestressed large-span concrete simply supported box girder curing method described in the first aspect, for identifying whether the indicator sticker color has changed from the first color to the second color, and automatically sending a shading drive command to the sunshade mechanism 200 when the dryness warning state is detected.

[0055] Specifically, by integrating color-changing surface moisture indicator stickers with the 300 vision monitoring system of industrial cameras and introducing edge controllers to achieve automated decision-making, the problems of incomplete manual inspection and monitoring, untimely response, limited coverage of traditional sensors, and complex installation and maintenance are solved. This achieves the effect of comprehensive and real-time monitoring of the status of multiple areas and precise triggering of local shading intervention.

[0056] The main frame 100 of the canopy adopts a modular steel structure design, forming a closed curing space. Its integrated spray curing system periodically sprays atomized water onto the concrete surface to maintain a suitable humidity environment. The shading mechanism 200 is preferably an electrically operated roller shutter mechanism or an electrically driven flip-up shading panel, installed along the guide rail system at the top of the main frame 100. It can move along the guide rail to the designated monitoring area according to instructions, realizing dynamic switching between shading and illumination curing states. Multiple industrial cameras 300, employing high resolution and wide dynamic range industrial-grade equipment, are evenly distributed circumferentially along the main frame 100 of the canopy, ensuring complete coverage of key areas on the box girder surface, including the upper surface of the flange plate, the lower edge of the flange plate, the upper and middle parts of the outer side of the web plate, and the light-sensitive parts of the top plate. The edge controller, as the core processing unit, establishes a stable connection with the industrial camera 300 and the sunshade mechanism 200 through a wired or wireless communication interface. Its built-in image processing algorithm compares the RGB average value range or HSV hue dominant value range of the acquired indicator patch area to determine the color status change in real time.

[0057] During actual operation, when the industrial camera 300 periodically captures images showing the indicator sticker's main color changing from the first color to the second color, or when most indicator stickers display the second color, the edge controller immediately recognizes that the monitored area has entered a dryness warning state and issues a precise shading drive command to the shading mechanism 200. The shading mechanism 200 then executes the shading action, blocking direct sunlight from reaching the monitored area and effectively reducing the evaporation rate of the concrete surface. Simultaneously, the edge controller can trigger an audible and visual alarm to issue a warning signal, and display the current dryness warning area, the most recently triggered indicator sticker image, and the opening / closing degree of the shading mechanism 200 in real time on the on-site display terminal. When the indicator sticker color returns to the first color and remains stable for a preset duration, the shading mechanism 200 gradually opens to allow diffused light, ensuring the continuity and accuracy of the curing process. Furthermore, the edge controller automatically saves the camera-captured images, trigger time, and shading action execution time for each dryness warning to the storage unit, forming a digital archive of the box girder's dryness warning-shading events.

[0058] In this embodiment, comprehensive monitoring and rapid response to the surface moisture content of a large-span simply supported concrete box girder are achieved. Compared to traditional manual inspections or point-based sensor solutions, the circumferential distribution design of the industrial camera 300 significantly expands the monitoring coverage, avoiding blind spots caused by the large span of the bridge. The localized movement function of the shading mechanism 200 enables precise intervention in dryness warning areas, avoiding resource waste caused by overall shading. The real-time image processing capability of the edge controller eliminates the lag in manual judgment, ensuring timely triggering of the protection mechanism when the surface moisture content drops to a critical dry state where the evaporation rate is significantly higher than the bleeding rate. Overall, this maintenance canopy, through structural integration and intelligent control, effectively prevents the risk of early concrete cracking and significantly improves the automation level and reliability of maintenance operations.

[0059] In one embodiment, the sunshade mechanism 200 is at least one of an electric roller blind mechanism, an electric push rod driven flip sunshade, and an electric lifting high reflective sunshade net.

[0060] Specifically, an electric roller blind mechanism is a device that uses a motor to drive a roller to rotate, thereby unfolding or retracting flexible shading materials (such as shading fabric or netting). Its working principle typically involves a motor driving one or more rollers via a reduction gear mechanism. The rotation of the rollers causes the shading material to move smoothly along guide rails or a support structure. The advantages of this mechanism are its relatively compact structure, controllable unfolding and retraction speeds, and minimal light obstruction when retracted. Implementation methods can include: using a tubular motor built into the roller to directly drive it; or using an external motor to drive the roller via a chain, belt, or gear transmission mechanism.

[0061] An electrically driven, flip-up sunshade is a mechanism that changes the angle or position of the sunshade through the extension and retraction of an electric actuator. The electric actuator typically consists of a motor, reduction gears, and a lead screw and nut mechanism, converting the motor's rotary motion into linear reciprocating motion. When the electric actuator extends or retracts, it acts on the sunshade via a linkage mechanism or directly, causing the sunshade to flip, tilt, or translate, thereby adjusting the shading area and angle. The advantages of this mechanism include a robust structure, strong wind resistance, and precise control of the sunshade's flip angle, effectively blocking direct sunlight and introducing diffused light. Implementation methods can include: the electric actuator directly connecting to the sunshade's pivot shaft, with the actuator's extension and retraction driving the sunshade to flip; or the electric actuator driving multiple sunshades to flip synchronously via a linkage system.

[0062] An electrically operated, lifting, high-reflective shade net is a device that uses a motor-driven lifting mechanism to move a highly reflective shade net vertically, achieving either shading or light transmission. High-reflective shade nets effectively reflect solar radiation, reducing temperature within the maintenance space. Its working principle typically involves a motor-driven winch system or pulley system, using wire ropes or chains to raise and lower the edges or frame of the shade net. The advantages of this mechanism include its ability to cover a large area, and the high-reflective material helps reduce heat absorption, making it particularly suitable for maintenance environments requiring strict temperature control. Implementation methods can include: using a winch system driven by multiple synchronous motors to control the raising and lowering of the four corners or edges of the shade net; or using a scissor-lift mechanism, where an electric push rod drives the scissor structure to raise and lower the entire shade net.

[0063] In this embodiment, a shading mechanism 200 is installed on the main frame 100 of the canopy, and the edge controller automatically sends a shading drive command to the shading mechanism 200 based on the color status of the moisture indicator sticker, thereby achieving intelligent maintenance of the prestressed large-span simply supported concrete box girder. When the shading mechanism 200 specifically adopts at least one of the following: an electric roller shutter mechanism, an electric push rod driven flip-up shading panel, or an electric lifting high-reflective shading net, it works in conjunction with the edge controller and the industrial camera 300 to form a shading system with rapid response and precise control.

[0064] An industrial camera 300 periodically acquires images of surface moisture indicators that change color, and transmits the image data to an edge controller. The edge controller processes the images and determines the color state of the moisture indicator. Once it determines that the main color of the moisture indicator has changed from the first color to the second color, indicating that the corresponding monitoring area has entered a dryness warning state, the edge controller immediately sends a corresponding drive command to the shading mechanism 200. If an electric roller shutter mechanism is used, the edge controller commands its motor to drive the roller to rotate, causing the shading fabric to quickly unfold and cover the target monitoring area, thereby blocking direct sunlight. If an electric push rod-driven flip-up shading panel is used, the edge controller commands the electric push rod to extend and retract, causing the shading panel to flip to the shading angle, precisely controlling the sunlight incidence. If an electric lifting high-reflective shading net is used, the edge controller commands the lifting mechanism to lower the high-reflective shading net to a preset position, forming a large area of ​​shading while reflecting most of the solar radiation. These specific types of shading mechanisms 200, compared to general or manual shading methods, can achieve automated and regionalized precise control. These devices can quickly and accurately execute shading actions based on instructions from edge controllers, effectively blocking direct sunlight and preventing cracks from forming on the concrete surface due to excessively rapid local drying. At the same time, the design of these electric mechanisms also considers durability and reliability in outdoor environments, ensuring stable operation over long periods, thereby significantly improving the intelligence level of the curing process and the stability of the curing effect.

[0065] In one embodiment, the device further includes an audible and visual alarm and / or a field display terminal connected to the edge controller. The field display terminal is used to display which monitoring areas are currently in a dryness warning state, the indicator sticker image at the time of the most recent trigger, and the current opening and closing degree of the shading mechanism.

[0066] Specifically, an audible and visual alarm is a device used to emit auditory and / or visual warning signals. Its function is to provide immediate and significant alerts to on-site operators or managers through sound (such as buzzers or alarm sounds) and / or light (such as flashing lights or warning lights) when the system detects a specific event (e.g., a dryness warning state), thereby attracting their attention and prompting appropriate measures. An audible and visual alarm can be a standalone alarm unit or an indicator light and buzzer integrated into a control box. A field display terminal is a device installed on-site to display the system's operating status and related information in real time. This terminal can be an LCD screen, LED display, industrial touchscreen, or tablet computer, etc., providing on-site personnel with an intuitive human-machine interface for viewing system data, monitoring maintenance processes, troubleshooting, or manual operation. The field display terminal can clearly present the specific monitoring area currently under a dryness warning state. This can be achieved by highlighting on a beam diagram, listing area names, or using color coding, aiming to allow operators to easily identify areas requiring attention. Furthermore, the on-site display terminal can show the image of the moisture indicator sticker that triggered the most recent dryness warning. This helps operators visually understand the specific evidence of the warning's occurrence, such as the visual change in the indicator sticker from the first color to the second color, thereby verifying the accuracy of the warning and providing a basis for subsequent analysis. Simultaneously, the on-site display terminal can display the current operating status of the shading mechanism in real time, such as its opening / closing percentage and whether it is fully open or fully closed. This allows operators to monitor the implementation of shading maintenance measures, ensure the effectiveness of shading actions, and make manual adjustments or interventions when necessary.

[0067] In this embodiment, by connecting an audible and visual alarm and / or a field display terminal to the edge controller of the curing canopy, real-time and intuitive monitoring and early warning feedback of the curing process of prestressed large-span simply supported concrete box girders are achieved. When the edge controller determines, based on images captured by the industrial camera 300, that the main color of the moisture content indicator sticker has changed from the first color to the second color, or that most moisture content indicator stickers display the second color, thus determining that the corresponding monitoring area has entered a dryness warning state, the edge controller will not only drive the corresponding area within the curing canopy to perform a shading action, but will also immediately send a signal to the audible and visual alarm to emit a warning sound and / or flash to alert on-site personnel. Simultaneously, the edge controller transmits data such as the current warning information, the monitoring area that triggered the warning, the image of the indicator sticker at the time of the most recent trigger, and the real-time opening and closing degree of the shading mechanism to the field display terminal. The field display terminal then presents this information to the operators in a visual manner. In this way, on-site personnel can receive warning information instantly and understand the warning area, cause, and system response in detail through the display terminal, thereby enabling them to quickly assess the situation and take necessary interventions or records, ensuring the continuity and effectiveness of the curing process. This integrated information feedback mechanism enables automated maintenance systems to provide efficient maintenance while also maintaining the convenience and accuracy of manual monitoring and management.

[0068] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. A method for curing prestressed large-span simply supported concrete box girders, characterized in that, Multiple color-changing surface moisture indicator stickers are arranged in the target detection area on the surface of the prestressed large-span concrete simply supported box girder; wherein, the moisture indicator stickers show the first color when the surface moisture content is normal, and undergo an irreversible or reversible color change to the second color when the surface tends to dry and reaches a preset risk state. Multiple industrial cameras are installed at fixed positions on the maintenance canopy so that the field of view of each industrial camera covers the corresponding color-changing surface moisture indicator sticker. The industrial camera is controlled to periodically acquire images containing the color-changing surface moisture indicator sticker at preset time intervals; The color state of the region of interest (ROI) of the water content indicator sticker in the acquired image is determined. When it is determined that the main color of the moisture content indicator sticker changes from the first color to the second color, or when most moisture content indicator stickers display the second color, the corresponding monitoring area is determined to enter a dryness warning state. When any monitoring area enters a dryness warning state, the corresponding area inside the maintenance canopy is activated to perform a shading action and block direct sunlight from hitting the corresponding monitoring area, thus carrying out maintenance work.

2. The curing method for prestressed large-span simply supported concrete box girders as described in claim 1, characterized in that, The step of performing a simple color state determination on the region of interest of the moisture content indicator stickers in the acquired image, and determining that the main color of the moisture content indicator stickers changes from the first color to the second color, or that most moisture content indicator stickers display the second color, and determining that the corresponding monitoring area enters a dryness warning state, further includes: When the surface moisture content of the prestressed large-span concrete simply supported box girder decreases to a point where the evaporation rate is significantly higher than the bleeding rate, the discoloration point of the moisture content indicator sticker is in a critically dry state.

3. The curing method for prestressed large-span simply supported concrete box girders as described in claim 2, characterized in that, The step of determining the color state of the region of interest for the water content indicator sticker in the acquired image includes: The color status of the water content indicator patch in the acquired image is determined by comparing the RGB average value range or the HSV hue dominant value range.

4. The curing method for prestressed large-span simply supported concrete box girders as described in claim 3, characterized in that, The monitoring area includes at least one of the following: the upper surface of the flange plate, the edge of the lower surface of the flange plate, the upper middle part of the outer side of the web plate, and the part of the top plate that is easily exposed to light.

5. The curing method for prestressed large-span simply supported concrete box girders as described in claim 1, characterized in that, After determining that the main color of the moisture content indicator sticker changes from the first color to the second color, or that most moisture content indicator stickers display the second color, the step of determining that the corresponding monitoring area has entered a dryness warning state further includes: It triggers an audible and visual alarm signal.

6. The curing method for prestressed large-span simply supported concrete box girders as described in claim 5, characterized in that, After the step of driving the corresponding area inside the maintenance canopy to perform shading action and block direct sunlight from hitting the corresponding monitoring area when any monitoring area enters a dry warning state, and carrying out maintenance work, the method further includes: Once the color of the moisture indicator sticker returns to the first color and remains stable for a preset duration, the electric sunshade mechanism is allowed to gradually or fully open to allow diffused light.

7. The curing method for prestressed large-span simply supported concrete box girders as described in claim 6, characterized in that, After the step of driving the corresponding area inside the maintenance canopy to perform shading action and block direct sunlight from hitting the corresponding monitoring area when any monitoring area enters a dry warning state, and carrying out maintenance work, the method further includes: It also includes the step of automatically saving the camera-captured images, trigger time, and shading action execution time to the storage unit each time a dryness warning is triggered, forming a digital archive of dryness warning-shading events for the box girder.

8. A maintenance awning, characterized in that, Used for performing the curing method for prestressed large-span simply supported concrete box girders as described in any one of claims 1 to 7; The maintenance canopy includes: The main frame of the canopy has a maintenance space inside, and a spray maintenance system facing the maintenance space is installed on the main frame of the canopy. A sunshade mechanism is installed on the top of the main frame of the canopy. The sunshade mechanism can move along the top of the main frame of the canopy so that the maintenance space can switch between a shaded maintenance state and a lighted maintenance state. Multiple industrial cameras, all of which are circumferentially spaced on the main frame of the canopy and all of which are oriented towards the maintenance space; and, An edge controller is communicatively connected to the industrial camera and the sunshade mechanism. The edge controller is equipped with a function for executing the prestressed large-span concrete simply supported box girder curing method as described in any one of claims 1 to 7, for identifying whether the indicator patch color changes from the first color to the second color, and automatically sending a shading drive command to the sunshade mechanism when the dryness warning state is detected.

9. The maintenance awning as described in claim 8, characterized in that, The shading mechanism is at least one of an electric roller blind mechanism, an electric push rod driven flip-up shading panel, or an electric lifting high-reflective shading net.

10. The maintenance canopy as described in claim 8, characterized in that, It also includes an audible and visual alarm and / or a field display terminal connected to the edge controller. The field display terminal is used to display which monitoring areas are currently in a dryness warning state, the indicator sticker image at the time of the most recent trigger, and the current opening and closing degree of the shading mechanism.

Images