A visual monitoring system for kerb construction sites

Abstract

The present application relates to construction monitoring technical field, especially relate to a kind of curbstone construction site visual monitoring system, comprising: image acquisition module, to obtain the image information of the curbstone of laying completion;Model construction and division module, to construct the ideal laying path of curbstone based on design drawing, and it is divided into several straight-line sections and several curved sections, and construct section model of curbstone and construct preset laying path;Fitting module, to determine the eligibility of straight-line section laying based on maximum offset distance, and under the condition that straight-line section laying is eligible, determine the position of the preset laying path laying unqualified;Determine the eligibility of curved section laying based on radius variance;Adjustment determination module, to determine the number of sections that need to be adjusted based on offset angle, or, determine the adjustment range of template spacing based on variance difference value.The present application improves the line smoothness of curbstone overall installation.

Description

Technical Field

[0001] The present invention relates to the technical field of construction monitoring, and in particular to a visual monitoring system for a curbstone construction site. Background Art

[0002] Traditional curb construction relies primarily on manual labor and on-site supervision. However, due to the complex construction environment and varying skill levels of workers, it's difficult to ensure the desired overall curb quality. For example, curb lines may be uneven, overall strength may be insufficient, and even construction errors may occur. These issues not only affect the aesthetics and durability of the highway but also pose a threat to driving safety.

[0003] In order to solve these problems, modern curb construction sites have begun to adopt visual monitoring systems. This system uses cameras and other equipment to collect images of the construction site in real time, and uses advanced image processing and recognition technology to conduct real-time monitoring and early warning analysis of the curb construction situation. By comparing the construction standards of the design drawings with the actual construction situation, the system can promptly identify problems in the construction and remind on-site workers and managers to take appropriate measures to correct them through screen warnings and other means.

[0004] Chinese patent application publication number CN113322757A discloses a construction method for ensuring the quality of curbstone installation. This invention involves pre-reserving a connection groove on the curbstone, connecting it with a connecting rod of a connecting assembly, and then installing and connecting it through a limit plate and a second prying ring on it. This method also ensures the consistency of the curbstone installation gap. Using a sliding groove on a bracket and a jacking mechanism, the curbstone is pushed backward along the sliding groove using the jacking mechanism. During this process, the curbstone is connected to form a whole unit through the connecting assembly to prevent loosening. This makes the entire process simpler and faster.

[0005] It can be seen that the construction method for ensuring the installation quality of curbstones has the following problems: this method installs and connects the curbstones through connecting components, connecting them into a whole to prevent looseness problems, but this method lacks monitoring of the overall installation process of the curbstones and cannot guarantee the overall installation effect of the curbstones. Summary of the Invention

[0006] To this end, the present invention provides a visual monitoring system for a curb construction site, which is used to overcome the problem in the prior art of lack of monitoring of the curb construction process resulting in poor smoothness of the overall installation lines of the curb.

[0007] To achieve the above-mentioned object, the present invention provides a visual monitoring system for a curbstone construction site, comprising:

[0008] An image acquisition module is used to obtain image information of the paved curbstones;

[0009] a model building and division module, connected to the image acquisition module, for building an ideal paving path for the curbstones based on the design drawings, dividing the paving route of the curbstones into a plurality of straight sections and a plurality of curved sections according to the ideal paving path, building a section model of the curbstones based on the image information, and building a preset paving path for the curbstones based on the section model;

[0010] A fitting module, connected to the model building and partitioning module, includes:

[0011] a straight line section fitting unit, configured to determine the eligibility of the straight line section paving based on the maximum offset distance between the section model and the corresponding position of the ideal paving path, and, if the straight line section paving is qualified, fit the preset paving path with the ideal paving path to determine the position where the preset paving path fails to be paved;

[0012] A curve section fitting unit, which is used to determine the eligibility of the curve section paving based on the radius variance of the section model;

[0013] A calling unit, configured to select and call the straight line section fitting unit or the curve section fitting unit based on the division result of the model building and division module;

[0014] An adjustment determination module is connected to the fitting module and is used to determine the number of sections that need to be adjusted based on the offset angle when it is determined that the paving of the straight section is unqualified, or to determine the adjustment range of the template spacing based on the variance difference when it is determined that the paving of the curved section is unqualified.

[0015] Furthermore, the model construction and division module divides the center line of the ideal paving path into several points and determines the slope of each point, determines the section where the difference between the slopes of two adjacent points is zero as a straight line section, and determines the point where the difference between the slopes of two adjacent points is not zero and belongs to the straight line section as the end point of the straight line section.

[0016] Furthermore, the model construction and division module determines the point where the slope difference between two adjacent points is not zero and does not belong to the straight line section as the starting point of the curve section, and determines the radius of subsequent points based on the starting point, and determines the section where the radius difference between two adjacent points is zero as the curve section, and determines the point where the radius difference between two adjacent points is not zero and belongs to the curve section as the end point of the curve section.

[0017] Furthermore, the straight section fitting unit overlaps the center line of the section model with the center line of the ideal paving path, determines the maximum distance between the non-overlapping positions of the two center lines as the maximum offset distance, and determines that the straight section paving is qualified based on the comparison result that the maximum offset distance is less than or equal to the preset distance, and determines that the straight section paving is unqualified based on the comparison result that the maximum offset distance is greater than the preset distance.

[0018] Furthermore, the straight section fitting unit fits the preset paving path with the ideal paving path under the condition that the straight section paving is qualified, and determines the position where the distance between the center line of the preset paving path and the center line of the ideal paving path is equal to the preset distance.

[0019] Furthermore, the curve section fitting unit determines that the paving of the curve section is unqualified based on the comparison result that the radius variance is greater than a preset variance.

[0020] Furthermore, under the condition that the paving of the straight section is determined to be unqualified, the adjustment determination module determines the angle between the center line of the straight section and the center line of the ideal paving path as the offset angle, and based on the comparison result that the offset angle is greater than or equal to the preset angle, determines that the section distance that needs to be adjusted is calculated using the first coefficient, and based on the comparison result that the offset angle is less than the preset angle, determines that the section distance that needs to be adjusted is calculated using the second coefficient.

[0021] Furthermore, the adjustment determination module determines the paving distances of subsequent sections in sequence and calculates the sum of the paving distances under the condition of determining the section distance that needs to be adjusted, until the sum of the paving distances is greater than or equal to the section distance that needs to be adjusted, and determines the number of sections corresponding to the sum of the paving distances as the number of sections that need to be adjusted.

[0022] Furthermore, the adjustment determination module determines to reduce the template spacing by a first amplitude based on a comparison result that the variance difference is greater than a preset difference, and determines to reduce the template spacing by a second amplitude based on a comparison result that the variance difference is less than or equal to a preset difference, under the condition that the paving of the curved section is unqualified, wherein the variance difference is the difference between the radius variance and the preset variance.

[0023] Furthermore, it also includes a display module for displaying the fitting result of the fitting module and the adjustment result of the adjustment determination module on a screen.

[0024] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention divides the construction of the curb into several straight sections and several curved sections by constructing an ideal paving path for the curb, determines the eligibility of the construction based on the section model of the completed curb, sets different standards for the straight sections and the curved sections for comparison, which can improve the accuracy of the judgment; under the condition of judging the construction as qualified, constructs an overall preset paving path based on the completed construction part, the deviation will be magnified as the construction distance increases, and determines the position corresponding to the preset distance to provide reference information for correction of the construction process of the unconstructed part; under the condition of judging the construction as unqualified, determines the degree of unqualified, and then determines the section distance that needs subsequent adjustment based on the degree of unqualified, thereby providing an accurate basis for reducing the deviation, thereby further improving the overall monitoring accuracy of the curb construction, and further improving the smoothness of the overall installation line of the curb.

[0025] Furthermore, the present invention divides the center line into countless points, divides the ideal paving path into sections according to the specific conditions of each point, and accurately distinguishes straight sections from curved sections, providing an accurate basis for subsequent monitoring, thereby improving the overall monitoring accuracy of curb construction and further improving the smoothness of the overall installation lines of the curb.

[0026] Furthermore, the present invention determines whether the paving of a straight section is qualified based on the maximum offset distance of the center line of the model. The offset distance will increase as the section extends. Determining the eligibility of the paving by the maximum offset distance can more accurately judge the paving condition of the straight section; for the curved section, the radius variance is used to determine whether the paving is qualified. The smaller the radius variance, the better the radius consistency, and the more the paving meets the design requirements. Different methods are used to make judgments for different situations, thereby improving the overall monitoring accuracy of the curb and further improving the smoothness of the overall installation lines of the curb.

[0027] Furthermore, when the present invention determines that the paving of a straight section or a curved section is unqualified, it makes precise adjustments according to different situations and displays the results on the screen to provide guidance for the construction process of the curb, thereby improving the overall monitoring accuracy of the curb and further improving the smoothness of the overall installation lines of the curb. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural block diagram of a visual monitoring system for a curb construction site according to an embodiment of the present invention;

[0029] Figure 2 A flow chart for determining the eligibility of a straight line section paving according to an embodiment of the present invention;

[0030] Figure 3A flow chart for determining the eligibility of a curved section paving according to an embodiment of the present invention;

[0031] Figure 4 A flow chart of determining a reduction range of template spacing according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0033] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] See also Figures 1-4 As shown, Figure 1 This is a structural block diagram of a visual monitoring system for a curb construction site according to an embodiment of the present invention; Figure 2 A flow chart for determining the eligibility of a straight line section paving according to an embodiment of the present invention; Figure 3 A flow chart for determining the eligibility of a curved section paving according to an embodiment of the present invention; Figure 4 A flow chart of determining a reduction range of template spacing according to an embodiment of the present invention.

[0037] An embodiment of the present invention provides a visual monitoring system for a curb construction site, comprising:

[0038] An image acquisition module is used to obtain image information of the paved curbstones;

[0039] a model building and division module, connected to the image acquisition module, for building an ideal paving path for the curbstones based on the design drawings, dividing the paving route of the curbstones into a plurality of straight sections and a plurality of curved sections according to the ideal paving path, building a section model of the curbstones based on the image information, and building a preset paving path for the curbstones based on the section model;

[0040] A fitting module, connected to the model building and partitioning module, includes:

[0041] a straight line section fitting unit, configured to determine the eligibility of the straight line section paving based on the maximum offset distance between the section model and the corresponding position of the ideal paving path, and, if the straight line section paving is qualified, fit the preset paving path with the ideal paving path to determine the position where the preset paving path fails to be paved;

[0042] A curve section fitting unit, which is used to determine the eligibility of the curve section paving based on the radius variance of the section model;

[0043] A calling unit, configured to select and call the straight line section fitting unit or the curve section fitting unit based on the division result of the model building and division module;

[0044] An adjustment determination module is connected to the fitting module and is used to determine the number of sections that need to be adjusted based on the offset angle when it is determined that the paving of the straight section is unqualified, or to determine the adjustment range of the template spacing based on the variance difference when it is determined that the paving of the curved section is unqualified.

[0045] Specifically, the image information of the curb obtained by the image acquisition module is captured by a high-definition camera. The specific model and parameters of the camera are not limited, and it only needs to meet the shooting requirements.

[0046] Specifically, the model construction and division model can be constructed by using software such as 3ds Max to construct an ideal paving path for the curb according to the design drawings.

[0047] Specifically, the preset paving path is a paving path in which all curbstones are paved, which is obtained with the help of an intelligent algorithm based on a completed work section model.

[0048] It can be understood that the section model is a model of a section that has been completed, and the ideal paving path and the preset paving path are both models of a section where all curbstones have been completed.

[0049] Specifically, the model building and division module divides the center line of the ideal paving path into several points and determines the slope of each point, determines the section where the difference between the slopes of two adjacent points is zero as a straight line section, and determines the point where the difference between the slopes of two adjacent points is not zero and belongs to the straight line section as the end point of the straight line section.

[0050] Specifically, the model construction and division unit divides the center line of the ideal paving path into an infinite number of points, determines the slope of each point, and if the difference in slopes between two adjacent points is 0, it means that there is a straight line between the two points. For example: the center line is divided into 10 points, and the slopes of these 10 points are determined to be 0, 0, 0, 0, 0, 0, 1, 1.5, and 2, respectively. By calculating that the difference in slopes between the 1st and 2nd points is 0, the difference in slopes between the 2nd and 3rd points is 0, the difference in slopes between the 3rd and 4th points is 0, and so on, it can be concluded that the line segment from the 1st point to the 7th point is a straight line section, and the 7th point is the end point of the straight line section. Starting from the 8th point is a curved section, and the 8th point is also the starting point of the curved section.

[0051] Specifically, the model construction and division module determines the point where the slope difference between two adjacent points is not zero and does not belong to the straight line section as the starting point of the curve section, and determines the radius of subsequent points based on the starting point, and determines the section where the radius difference between two adjacent points is zero as the curve section, and determines the point where the radius difference between two adjacent points is not zero and belongs to the curve section as the end point of the curve section.

[0052] Specifically, starting from the starting point of the curve section, the radius of each point in the curve section is determined. For example, the radius of the 10 points are determined to be 5m, 5m, 5m, 5m, 5m, 5m, 6m, 6m, 6m, and 7m respectively. The difference between two adjacent points can be 0, 0, 0, 0, 0, -1, 0, 0, -1, indicating that the line segment between the 1st point to the 6th point is the first curve section, and the line segment between the 7th point to the 9th point is the second curve section.

[0053] Specifically, further subdividing the curved section according to radius can better facilitate construction.

[0054] Specifically, the straight section fitting unit overlaps the center line of the section model with the center line of the ideal paving path, determines the maximum distance between the positions where the two center lines do not overlap as the maximum offset distance, and determines that the straight section paving is qualified based on the comparison result that the maximum offset distance is less than or equal to the preset distance, and determines that the straight section paving is unqualified based on the comparison result that the maximum offset distance is greater than the preset distance.

[0055] Specifically, the preset distance is based on the maximum deviation distance allowed on the design drawing.

[0056] Specifically, the paving of the curb is carried out in sections, with a control point set every 10 meters on the straight section and a control point set every 5 meters on the curved section. For a single section, the double-line method is used to determine the straightness and top surface elevation of the curb construction. The possibility of causing offset during the construction of a single section is small, but the workers have a low degree of control over the entire curb, which can easily cause overall errors. In the embodiment of the present invention, monitoring is carried out every time a section is constructed starting from the beginning of the curb construction, and the unconstructed part is predicted according to the construction habits based on the constructed part, and necessary adjustments are made based on the prediction results to ensure the overall construction effect.

[0057] Specifically, the straight section fitting unit fits the preset paving path with the ideal paving path under the condition that the straight section paving is qualified, and determines the position where the distance between the center line of the preset paving path and the center line of the ideal paving path is equal to the preset distance.

[0058] It is understandable that the offset generated in the current construction section is within the allowable range. If the current construction method is not adjusted, this offset will be magnified as the construction section is extended. Therefore, the preset paving path is compared with the ideal paving path, and the position point at the preset distance is determined and presented on the display screen, so that workers and managers can adjust the construction process in time.

[0059] Specifically, the curve section fitting unit determines that the curve section paving is unqualified based on the comparison result that the radius variance is greater than the preset variance, and determines that the curve section paving is qualified based on the comparison result that the radius variance is less than or equal to the preset variance.

[0060] Specifically, the value range of the preset variance is set to [0.1, 0.5], and 0.3 is preferably used in the embodiment of the present invention.

[0061] Specifically, the smaller the radius variance, the more the construction effect of the curve section conforms to the ideal situation of the design drawing.

[0062] Specifically, the adjustment determination module, under the condition that the straight section is determined to be unqualified for paving, determines the angle between the center line of the straight section and the center line of the ideal paving path as an offset angle, and determines, based on a comparison result that the offset angle is greater than or equal to a preset angle, to calculate the section distance that needs to be adjusted using a first coefficient;

[0063] Based on the comparison result that the offset angle is smaller than the preset angle, it is determined that the section distance that needs to be adjusted is calculated using the second coefficient.

[0064] Specifically, under the condition that the straight section that has been completed is unqualified, fine-tuning is performed in the subsequent construction process to correct the construction path. It can be understood that the larger the offset angle, the longer the section distance that needs to be adjusted.

[0065] Specifically, the value range of the preset angle is set to [3°, 5°], and 4° is preferred in the embodiment of the present invention; the value range of the first coefficient is set to [0.1, 0.12], and 0.1 is preferred in the embodiment of the present invention; the value range of the first coefficient is set to [0.13, 0.15], and 0.14 is preferred in the embodiment of the present invention.

[0066] It is understandable that the larger the offset angle, the longer the distance of the work section that needs to be adjusted. Only when the distance of the work section that needs to be adjusted is long enough can the installation path be fine-tuned without affecting the smoothness of the curb installation line.

[0067] Specifically, the calculation method for the section distance that needs to be adjusted is: the ratio of the offset angle to the corresponding coefficient is the section distance that needs to be adjusted. For example: the offset angle is 5°, and the corresponding coefficient is the first coefficient 0.05, then the offset distance is 5 / 0.1=50m.

[0068] Specifically, the adjustment determination module determines the paving distances of subsequent sections and calculates the sum of the paving distances under the condition of determining the section distance that needs to be adjusted, until the sum of the paving distances is greater than or equal to the section distance that needs to be adjusted, and determines the number of sections corresponding to the sum of the paving distances as the number of sections that need to be adjusted.

[0069] Specifically, the process of determining the number of sections that need to be adjusted is illustrated by taking an example. For example, the distance of the section that needs to be adjusted is 50m, and the laying distances of the subsequent sections are 10m, 20m, 15m, 6m, and 8m, respectively. 10m+20m+15m+6m=51m>50m, indicating that the number of sections that need to be adjusted is 4.

[0070] Specifically, the adjustment determination module determines to reduce the template spacing by a first amplitude based on a comparison result that the variance difference is greater than a preset difference under the condition that the paving of the curved section is unqualified;

[0071] Determining to reduce the template spacing by a second magnitude based on a comparison result that the variance difference is less than or equal to a preset difference;

[0072] The variance difference is the difference between the radius variance and a preset variance.

[0073] Specifically, the value range of the preset difference is set to [0.2, 0.4], and the embodiment of the present invention preferably is 0.3; the value range of the first amplitude is set to [2cm, 4cm], and the embodiment of the present invention preferably is 3cm; the value range of the second amplitude is set to [1cm, 2cm), and the embodiment of the present invention preferably is 1.5cm.

[0074] Specifically, it also includes a display module for displaying the fitting result of the fitting module and the adjustment result of the adjustment determination module on a screen for workers' reference.

[0075] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0076] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A visual monitoring system for curb construction sites, characterized in that: include: An image acquisition module is used to obtain image information of the paved curbstones; a model building and division module, connected to the image acquisition module, for building an ideal paving path for the curbstones based on the design drawings, dividing the paving route of the curbstones into a plurality of straight sections and a plurality of curved sections according to the ideal paving path, building a section model of the curbstones based on the image information, and building a preset paving path for the curbstones based on the section model; A fitting module, connected to the model building and partitioning module, includes: a straight line section fitting unit, configured to determine the eligibility of the straight line section paving based on the maximum offset distance between the section model and the corresponding position of the ideal paving path, and, if the straight line section paving is qualified, fit the preset paving path with the ideal paving path to determine the position where the preset paving path fails to be paved; A curve section fitting unit, which is used to determine the eligibility of the curve section paving based on the radius variance of the section model; A calling unit, configured to select and call the straight line section fitting unit or the curve section fitting unit based on the division result of the model building and division module; an adjustment determination module connected to the fitting module, configured to determine the number of sections that need to be adjusted based on the offset angle if the straight section is determined to be unqualified, or to determine the adjustment range of the template spacing based on the variance difference if the curved section is determined to be unqualified; The model building and division module divides the center line of the ideal paving path into a plurality of points and determines the slope of each point, determines the section where the difference between the slopes of two adjacent points is zero as a straight line section, and determines the point where the difference between the slopes of two adjacent points is not zero and belongs to the straight line section as the end point of the straight line section; The model building and division module determines a point where the difference in slope between two adjacent points is not zero and does not belong to the straight line section as the starting point of the curve section, and determines the radius of each subsequent point based on the starting point, determines the section where each point where the difference in radius between two adjacent points is zero is located as the curve section, and determines the point where the difference in radius between two adjacent points is not zero and belongs to the curve section as the end point of the curve section; The straight section fitting unit overlaps the center line of the section model with the center line of the ideal paving path, determines the maximum distance between the positions where the two center lines do not overlap as the maximum offset distance, and determines that the straight section paving is qualified based on a comparison result that the maximum offset distance is less than or equal to a preset distance, and determines that the straight section paving is unqualified based on a comparison result that the maximum offset distance is greater than the preset distance.

2. The visual monitoring system for curb construction site according to claim 1, characterized in that: The straight section fitting unit fits the preset paving path with the ideal paving path under the condition that the straight section paving is qualified, and determines the position where the distance between the center line of the preset paving path and the center line of the ideal paving path is equal to the preset distance.

3. The visual monitoring system for curb construction site according to claim 2, characterized in that: The curve section fitting unit determines that the paving of the curve section is unqualified based on the comparison result that the radius variance is greater than the preset variance.

4. The visual monitoring system for curb construction site according to claim 3, characterized in that: When determining that the paving of a straight section is unqualified, the adjustment determination module determines the angle between the center line of the straight section and the center line of the ideal paving path as the offset angle, determines the section distance that needs to be adjusted to be calculated using a first coefficient based on a comparison result that the offset angle is greater than or equal to a preset angle, and determines the section distance that needs to be adjusted to be calculated using a second coefficient based on a comparison result that the offset angle is less than the preset angle.

5. The visual monitoring system for curb construction site according to claim 4, characterized in that: The adjustment determination module determines the paving distances of subsequent sections in sequence and calculates the sum of the paving distances under the condition that the section distance that needs to be adjusted is determined, until the sum of the paving distances is greater than or equal to the section distance that needs to be adjusted, and determines the number of sections corresponding to the sum of the paving distances as the number of sections that need to be adjusted.

6. The visual monitoring system for curbstone construction site according to claim 5, characterized in that: The adjustment determination module determines, under the condition that the paving of the curved section is unqualified, to reduce the template spacing by a first amplitude based on a comparison result that the variance difference is greater than a preset difference, and determines to reduce the template spacing by a second amplitude based on a comparison result that the variance difference is less than or equal to a preset difference, wherein the variance difference is the difference between the radius variance and the preset variance.

7. The visual monitoring system for curb construction site according to claim 6, characterized in that: The system further comprises a display module for displaying the fitting result of the fitting module and the adjustment result of the adjustment determination module on a screen.

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