A construction safety protection system based on building slope

Abstract

The present invention relates to the field of slope safety monitoring, and provides a construction safety protection system based on building slopes, including: an oblique photography module generates a three-dimensional model and its corresponding digital orthophoto through a drone; an analysis module identifies the digital orthophoto, obtains the slope rupture angle and slope height, determines the slope collapse area, marks the slope collapse area on the three-dimensional model, and obtains the safety protection level in combination with the slope type and meteorological information of the geographic information system; a feedback module is used to obtain corresponding safety protection information according to the safety protection level, and marks the safety protection level and safety protection information on the slope collapse area of ​​the three-dimensional model. The present invention improves the inspection efficiency of the staff on the building slope during construction, and ensures the safety of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of slope safety monitoring, and in particular to a building construction safety protection system based on building slopes. Background Art

[0002] A building slope refers to a slope with a regular shape formed by artificial excavation at a certain slope and shape at or around the building site.

[0003] Regular inspections are particularly important in the safety protection of building slopes during construction. Regular inspections are an important basis for understanding the current status of slopes, determining whether to carry out slope management and adjusting construction plans.

[0004] For example, the Chinese invention patent with application number 202310157967.X only discloses slope monitoring by detecting coordinates through drone oblique photography technology, but the monitoring process does not include the marking and monitoring of the landslide area.

[0005] Therefore, currently, the inspection of building slopes during construction is still mainly carried out by manual inspection. Manual inspection is inefficient, and blind spots are easily formed in areas with complex terrain, and there are hidden dangers to operational safety during the inspection process.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] To this end, the present invention provides a construction safety protection system based on building slopes, which uses a drone to take oblique photographs of a three-dimensional model and a digital orthophoto of the building slope. Through accurate recognition of the digital orthophoto, the slope collapse area of ​​the corresponding three-dimensional model is determined, and the slope collapse area, safety protection level and safety protection information are marked on the three-dimensional model, which facilitates the staff's observation and confirmation of the slope collapse area, improves the staff's inspection efficiency of the building slope during construction, and ensures the safety of the staff.

[0008] To achieve the above-mentioned purpose, the present invention proposes a construction safety protection system based on building slopes, comprising an oblique photography module, an analysis module and a feedback module;

[0009] The oblique photography module is used to obtain image data of the oblique photography of the building slope by the drone to generate a three-dimensional model and its corresponding digital orthophoto;

[0010] The analysis module includes an identification unit, a determination unit, a labeling unit and a deriving unit. The identification unit is used to identify the digital orthophoto to determine the edge area of ​​the digital orthophoto, and correspond the edge area to the three-dimensional model corresponding to the digital orthophoto. The determination unit is used to obtain the slope rupture angle and slope height of the edge area of ​​the three-dimensional model, and determine the horizontal slope collapse area of ​​the digital orthophoto according to the slope rupture angle, slope height and slope type obtained through the geographic information system. The labeling unit is used to label the horizontal slope collapse area on the three-dimensional model corresponding to the digital orthophoto to form the slope collapse area of ​​the three-dimensional model. The deriving unit is used to obtain the slope type and meteorological information related to the slope collapse area through the geographic information system, and derive the safety protection level of the slope collapse area in combination with the slope height.

[0011] The feedback module is used to obtain corresponding safety protection information according to the safety protection level, and mark the safety protection level and the safety protection information in the slope collapse area of ​​the three-dimensional model.

[0012] Furthermore, the deriving unit includes a danger level determination subunit, a meteorological protection level determination subunit and a safety protection level determination subunit, wherein:

[0013] The hazard level determination subunit is used to compare the slope type and the slope height with the slope engineering safety level table to obtain the corresponding hazard level;

[0014] The meteorological protection level determination subunit is used to obtain the meteorological protection level of the slope collapse area according to the meteorological information;

[0015] The safety protection level determination subunit is used to combine the hazard level and the protection level to obtain the safety protection level.

[0016] Furthermore, the security protection level determination subunit is provided with a calculation formula for the security protection level, and the calculation formula for the security protection level is as follows:

[0017] L = kA + cF;

[0018] Among them, L is the safety protection level, k is the first weight, c is the second weight, A is the corresponding set value of the danger level, and F is the corresponding set value of the meteorological protection level.

[0019] Furthermore, in the calculation formula of the safety protection level:

[0020] The first weight k is greater than the second weight c;

[0021] The second weight c when the slope type is a rock slope is less than the second weight c when the slope type is a soil slope.

[0022] Furthermore, the meteorological protection level determination subunit obtains multipliers of precipitation, lightning and hail and corresponding risk probabilities through the meteorological information, and obtains the corresponding set value of the meteorological protection level through the corresponding relationship between the multipliers and the protection level values.

[0023] Furthermore, the feedback module also marks the slope type, the meteorological information, the danger level and the meteorological protection level in the slope collapse area;

[0024] The feedback module determines whether to mark the alarm information based on the comparison result between the security protection level and the level threshold.

[0025] In particular, the safety protection level and safety protection information can more accurately reflect the safety situation of the slope collapse area, further improving the inspection efficiency of the building slopes by the staff during construction.

[0026] Furthermore, the marking unit is used to:

[0027] The slope type related to the building slope obtained by the geographic information system is used to determine whether the slope type of the edge area is a vertical soil slope, an inclined soil slope or a vertical rock slope, and the slope rupture angle and the slope height are substituted into different calculation formulas corresponding to the slope type to determine multiple horizontal projection distances of the impact range of the landslide area;

[0028] The multiple horizontal projection distances are marked on the digital orthophoto to form the horizontal slope collapse area.

[0029] In particular, by performing color and texture recognition on the two-dimensional digital orthophoto and the correspondence between the two-dimensional digital orthophoto and the three-dimensional model, accurate marking of the slope collapse area of ​​the three-dimensional model is achieved, thereby achieving an intuitive display of the slope collapse area.

[0030] Furthermore, the recognition unit includes a color recognition subunit, a texture recognition subunit and a determination subunit, wherein:

[0031] The color recognition subunit is used for analyzing the spectral color difference of the set area of ​​the digital orthophoto obtained by the module, and judging whether the colors are adjacent to each other by comparing the spectral color difference with the spectral empirical threshold;

[0032] The texture recognition subunit is used for analyzing the grayscale coefficient of the set area of ​​the digital orthophoto, and judging whether the texture is edge connected by comparing the grayscale coefficient with the grayscale empirical threshold;

[0033] The determination subunit is used to determine a set area where both color and texture are adjacent to each other as an adjacent area.

[0034] Furthermore, a calculation formula for the spectral color difference is provided in the color recognition subunit, and the calculation formula for the spectral color difference is as follows:

[0035]

[0036] Wherein, D is the spectral color difference, fa(i,j) is the pixel grayscale value of the i-th row and j-th column of the A image area of ​​the three-dimensional model, fb(i,j) is the pixel grayscale value of the i-th row and j-th column of the B image area of ​​the three-dimensional model, and M and N are the width and height of the set area of ​​the three-dimensional model, respectively.

[0037] Furthermore, a calculation formula for the spectral color difference is provided in the texture recognition subunit, and the calculation formula for the grayscale coefficient is as follows:

[0038]

[0039] Wherein, R is the grayscale coefficient, fa(i,j) is the grayscale value of the pixel in the i-th row and j-th column of the A image area of ​​the three-dimensional model, and fb(i,j) is the grayscale value of the pixel in the i-th row and j-th column of the B image area of ​​the three-dimensional model. is the grayscale mean of the A image area, is the grayscale mean of the B image area, and M and N are the width and height of the set area of ​​the three-dimensional model respectively.

[0040] In particular, through color recognition and texture recognition of digital orthophotos, the accurate and automatic generation of the slope collapse area of ​​the three-dimensional model is achieved.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The three-dimensional model and digital orthophoto of the building slope are taken by drone. Through the accurate recognition of the digital orthophoto, the corresponding slope collapse area of ​​the three-dimensional model is determined, and the slope collapse area, safety protection level and safety protection information are marked on the three-dimensional model, which facilitates the staff to observe and confirm the slope collapse area, improves the staff's inspection efficiency of the building slope during construction, and ensures the safety of the staff.

[0043] 2. Through color recognition and texture recognition of the two-dimensional digital orthophoto and the correspondence between the two-dimensional digital orthophoto and the three-dimensional model, the accurate marking of the slope collapse area of ​​the three-dimensional model is achieved, thereby achieving an intuitive display of the slope collapse area.

[0044] 3. Through color recognition and texture recognition of digital orthophotos, accurate automatic generation of slope collapse areas in the three-dimensional model is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of a construction safety protection system based on a building slope according to an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of a flow chart of a construction safety protection system based on a building slope according to an embodiment of the present invention;

[0047] Figure 3 This is a display diagram of the feedback module interface of an embodiment of the present invention;

[0048] Figure 4 This is the standard determination table for danger levels in the existing version of the Technical Specifications for Building Slope Engineering;

[0049] Figure 5 Application of the present invention Figure 4 Schematic representation of the slope engineering safety level in the standard judgment table. DETAILED DESCRIPTION

[0050] 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 only used to explain the present invention and are not used to limit the present invention.

[0051] 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 protection scope of the present invention.

[0052] 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 drawings. This is merely 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.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] like Figures 1 to 5As shown, the present invention provides a construction safety protection system based on building slopes, which uses a drone to take oblique photos of a three-dimensional model and a digital orthophoto of the building slope. Through accurate recognition of the digital orthophoto, the slope collapse area of ​​the corresponding three-dimensional model is determined, and the slope collapse area, safety protection level and safety protection information are marked on the three-dimensional model, which facilitates the staff to observe and confirm the slope collapse area, improves the staff's inspection efficiency of the building slope during construction, and ensures the safety of the staff.

[0055] The present invention also performs color recognition and texture recognition through two-dimensional digital orthophotos, and the correspondence between the two-dimensional digital orthophotos and the three-dimensional models, thereby achieving accurate marking of the collapse and landslide areas of the three-dimensional model slopes, and achieving intuitive display of the three-dimensional model of the collapse and landslide areas of the building slopes, thereby facilitating the staff to handle the collapse and landslide areas.

[0056] in, Figure 1 A schematic diagram of a construction safety protection system based on a building slope according to an embodiment of the present invention; Figure 2 A schematic diagram of a flow chart of a construction safety protection system based on a building slope according to an embodiment of the present invention;

[0057] Figure 3 This is a display diagram of the feedback module interface of an embodiment of the present invention; Figure 4 This is the standard determination table for danger levels in the existing version of the Technical Specifications for Building Slope Engineering; Figure 5 Application of the present invention Figure 4 Schematic representation of the slope engineering safety level in the standard judgment table.

[0058] Embodiment 1

[0059] like Figures 1 to 5 As shown, this embodiment proposes a construction safety protection system based on a building slope, including an oblique photography module, an analysis module and a feedback module; the oblique photography module is used to obtain image data of the building slope taken by an unmanned aerial vehicle through oblique photography, and generate a three-dimensional model and its corresponding digital orthophoto;

[0060] The analysis module is used to: identify the digital orthophoto to determine the edge area of ​​the digital orthophoto, and correspond the edge area to the three-dimensional model corresponding to the digital orthophoto; obtain the slope rupture angle and slope height of the edge area of ​​the three-dimensional model, and determine the horizontal slope collapse area of ​​the digital orthophoto according to the slope rupture angle, slope height and slope type obtained through the geographic information system; mark the horizontal slope collapse area on the three-dimensional model corresponding to the digital orthophoto to form the slope collapse area of ​​the three-dimensional model; obtain the slope type and meteorological information related to the slope collapse area through the geographic information system, and obtain the safety protection level of the slope collapse area in combination with the slope height;

[0061] The feedback module is used to obtain corresponding safety protection information according to the safety protection level, and mark the safety protection level and the safety protection information in the slope collapse area of ​​the three-dimensional model.

[0062] It should be noted that the geographic information system described in this embodiment is a GIS geographic information system.

[0063] It should be noted that the building slope described in this embodiment is preferably a slope of a mountain or hill beside a highway, that is, this embodiment is best applied to a slope of a mountain or hill beside a highway.

[0064] It should be noted that the drone is preferably a DJI drone, which can simultaneously output multiple data results such as digital orthophoto DOM, digital elevation model DEM, etc. The digital orthophoto DOM is a two-dimensional model, and the three-dimensional model is preferably a digital elevation model DEM.

[0065] Digital orthophoto (DOM) is an image data generated by correcting the projection difference of each pixel of the scanned digitized aerial photographs using the digital elevation model, and then mosaicking the images and cropping them according to the map range.

[0066] It is understandable that since the drone will obtain the coordinates of the target object in space during the process of three-dimensional modeling and generating digital orthophoto DOM, the three-dimensional model can be matched with the digital orthophoto DOM according to the coordinates, and then the two-dimensional model of the digital orthophoto DOM can be analyzed and annotated, that is, the corresponding annotation can be made on the three-dimensional model, and then the annotation of the three-dimensional model can be made more accurate through the accurate annotation of the two-dimensional model.

[0067] It should be noted that see Figure 1 The oblique photography module, analysis module and feedback module are preferably applied to a host computer that communicates with the drone, and the feedback module includes a software interface of the computer's display screen.

[0068] Furthermore, the analysis module is used to: compare the slope type and the slope height with the slope engineering safety level table to obtain the corresponding danger level; obtain the meteorological protection level of the slope collapse area based on the meteorological information; and obtain the safety protection level by combining the danger level and the meteorological protection level.

[0069] Furthermore, the analysis module is used to: compare the slope type and the slope height with the slope engineering safety level table to obtain the corresponding danger level; obtain the meteorological protection level of the slope collapse area based on the meteorological information; and obtain the safety protection level by combining the danger level and the meteorological protection level.

[0070] Furthermore, the calculation formula of the safety protection level is as follows:

[0071] L = kA + cF;

[0072] Among them, L is the safety protection level, k is the first weight, c is the second weight, A is the corresponding set value of the danger level, and F is the corresponding set value of the meteorological protection level.

[0073] It should be noted that the slope engineering safety level table described in this embodiment is based on the following Figure 4 The table of safety grade of slope engineering is shown in the existing technical specification for building slope engineering. Figure 5 It matches the technical specifications of the building slope engineering. Figure 5 It can be concluded that the greater the slope height, the lower the danger level, and the greater the corresponding setting value of the danger level. The corresponding setting value of the first danger level is 90, the corresponding setting value of the second danger level is 80, and so on.

[0074] Figure 4 In the standard judgment table shown, "very serious" refers to causing major casualties or property losses, "serious" refers to possible casualties or property losses, and "not serious" refers to possible property losses, which corresponds to the first weight k. The first weight k is an empirically set value that conforms to the actual situation of the building slope.

[0075] Furthermore, the first weight k is greater than the second weight c; and the second weight c when the slope type is a rock slope is less than the second weight c when the slope type is a soil slope.

[0076] Specifically, the first weight k is between 0.7 and 0.9, and 0.7 corresponds to Figure 4 In the standard judgment table shown in FIG. 1 , 0.8 corresponds to not serious, 0.9 corresponds to very serious, and therefore, the product of the first weight k and the hazard level A can correspond to Figure 4 The safety level required by the Technical Specifications for Building Slope Engineering.

[0077] Specifically, the second weight c is between 0.2 and 0.5. More specifically, the rock slope is not easily affected by precipitation, lightning and hail, so its second weight c is 0.2. The soil slope is easily affected by precipitation, lightning and hail, so its second weight c is 0.5.

[0078] Furthermore, the analysis module obtains multipliers of precipitation, lightning and hail and corresponding risk probabilities through the meteorological information, and obtains a corresponding set value of the meteorological protection level through the corresponding relationship between the multipliers and the meteorological protection level value.

[0079] Specifically, precipitation is scored between 0.7 and 0.9 according to the amount of precipitation, for example, light rain, moderate rain, heavy rain, rainstorm, heavy rainstorm, and extremely heavy rainstorm are 0.7, 0.72, 0.75, 0.8, 0.85, and 0.9 respectively. Lightning is scored between 0.8 and 0.9 according to its frequency of occurrence. Hail is scored between 0.7 and 0.9 according to its frequency of occurrence. The risk probability is preferably the number of occurrences within a month.

[0080] Furthermore, the feedback module also marks the slope type, the meteorological information, the danger level and the meteorological protection level in the slope collapse area; the feedback module determines whether to mark the alarm information based on the comparison result between the safety protection level and the level threshold. Figure 3 shown.

[0081] In particular, the safety protection level and safety protection information can more accurately reflect the safety situation of the slope collapse area, further improving the inspection efficiency of the building slopes by the staff during construction.

[0082] Furthermore, the analysis module is used to: determine whether the slope type of the edge area is a vertical soil slope, an inclined soil slope or a vertical rock slope based on the slope type related to the building slope obtained through the geographic information system, substitute the slope rupture angle and the slope height into different calculation formulas corresponding to the slope type, and determine multiple horizontal projection distances of the landslide area impact range; mark the multiple horizontal projection distances on the digital orthophoto to form the horizontal slope collapse area.

[0083] It should be noted that according to the Technical Specifications for Building Slope Engineering, the horizontal projection distance of the impact range of the landslide area can be obtained by dividing the slope height by tanθ, where θ is the slope rupture angle.

[0084] The values ​​of the slope rupture angle θ are divided into the following four cases: 1. For vertical soil slopes, θ is 45°+φ / 2, where φ is the internal friction angle of the soil; 2. For inclined soil slopes, θ is (β+φ) / 2, where φ is the internal friction angle of the soil and β is the internal friction angle between the slope surface and the horizontal plane; 3. For vertical rock slopes; for permanent slopes without building loads on the top of the slope and temporary slopes and foundation pit slopes with building loads on the top of the slope, the rupture angle is determined as 45°+φ / 2, and the Class I rock slope can be about 75°; the rupture angle of temporary slopes without building loads on the top of the slope and foundation pit slopes, Class I rock slopes are 82°; Class II rock slopes are 72°; Class III rock slopes are 62°; Class IV rock slopes are 45°+φ / 2°. All the above information and data can be obtained through three-dimensional models or geographic information systems GIS.

[0085] In particular, by performing color and texture recognition on the two-dimensional digital orthophoto and the correspondence between the two-dimensional digital orthophoto and the three-dimensional model, accurate marking of the slope collapse area of ​​the three-dimensional model is achieved, thereby achieving an intuitive display of the slope collapse area.

[0086] Furthermore, the analysis module performs color recognition and texture recognition on the digital orthophoto to determine the edge region of the digital orthophoto; the color recognition includes: the analysis module obtains the spectral color difference of the set region of the digital orthophoto, and judges whether the colors are edged by comparing the spectral color difference with the spectral empirical threshold; the texture recognition includes: the analysis module obtains the grayscale coefficient of the set region of the digital orthophoto, and judges whether the textures are edged by comparing the grayscale coefficient with the grayscale empirical threshold;

[0087] If the color and the texture of the set area are both adjacent to each other, the set area is determined as an adjacent area.

[0088] Furthermore, the calculation formula of the spectral color difference is as follows:

[0089]

[0090] Wherein, D is the spectral color difference, fa(i,j) is the pixel grayscale value of the i-th row and j-th column of the A image area of ​​the three-dimensional model, fb(i,j) is the pixel grayscale value of the i-th row and j-th column of the B image area of ​​the three-dimensional model, and M and N are the width and height of the set area of ​​the three-dimensional model, respectively.

[0091] Furthermore, the grayscale coefficient is calculated as follows:

[0092]

[0093] Wherein, R is the grayscale coefficient, fa(i,j) is the grayscale value of the pixel in the i-th row and j-th column of the A image area of ​​the three-dimensional model, and fb(i,j) is the grayscale value of the pixel in the i-th row and j-th column of the B image area of ​​the three-dimensional model. is the grayscale mean of the A image area, is the grayscale mean of the B image area, and M and N are the width and height of the set area of ​​the three-dimensional model respectively.

[0094] In particular, through color recognition and texture recognition of digital orthophotos, the accurate and automatic generation of the slope collapse area of ​​the three-dimensional model is achieved.

[0095] Specifically, its application effects are as follows: Figure 3As shown in the figure, the oblique line is the road, the area circled by the white curve at the lower right side of the road is the edge area, the white curve is the edge line of the A image area and the connecting area of ​​the A image area where both color and texture are connected, and the large black area is a mountain or hill.

[0096] It can be understood that the closer the colors of the A image area and the B image area are, the smaller the value of the grayscale correlation coefficient R is. The grayscale correlation coefficient R is preferably 1.1, and can be set within the range of 1.1 to 1.4 according to different slope types, in line with the different degrees of texture connection of different slope types. Specifically, the spectral empirical threshold of the rock slope is 1.4, and the spectral empirical threshold of the soil slope is 1.1.

[0097] In particular, the automatic generation of the slope collapse area of ​​the three-dimensional model is achieved through color recognition and texture recognition of the digital orthophoto DOM.

[0098] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction safety protection system based on building slopes, characterized in that: It includes oblique photography module, analysis module and feedback module; The oblique photography module is used to obtain image data of the oblique photography of the building slope by the drone to generate a three-dimensional model and its corresponding digital orthophoto; The analysis module includes an identification unit, a determination unit, a labeling unit and a deriving unit; The identification unit is used to identify the digital orthophoto to determine the edge area of ​​the digital orthophoto, and correspond the edge area to the three-dimensional model corresponding to the digital orthophoto. The determination unit is used to obtain the slope rupture angle and slope height of the edge area of ​​the three-dimensional model, and determine the horizontal slope collapse area of ​​the digital orthophoto according to the slope rupture angle, slope height and slope type obtained through the geographic information system. The annotation unit is used to annotate the horizontal slope collapse area on the three-dimensional model corresponding to the digital orthophoto to form the slope collapse area of ​​the three-dimensional model. The derivation unit is used to obtain the slope type and meteorological information of the slope collapse area through the geographic information system, and derive the safety protection level of the slope collapse area in combination with the slope height; The feedback module is used to obtain corresponding safety protection information according to the safety protection level, and mark the safety protection level and the safety protection information on the slope collapse area of ​​the three-dimensional model; Wherein, the three-dimensional model is a digital elevation model; The marking unit is used to: determine the slope type of the edge area as a vertical soil slope, an inclined soil slope or a vertical rock slope through the slope type related to the building slope obtained by the geographic information system, substitute the slope rupture angle and the slope height into different calculation formulas corresponding to the slope type, determine multiple horizontal projection distances of the landslide area, mark the multiple horizontal projection distances on the digital orthophoto, and form the horizontal slope collapse area; The derivation unit includes a danger level determination subunit, a meteorological protection level determination subunit and a safety protection level determination subunit, wherein: The hazard level determination subunit is used to compare the slope type and the slope height with the slope engineering safety level table to obtain the corresponding hazard level, wherein the slope engineering safety level table is obtained according to the technical specifications for building slope engineering; The meteorological protection level determination subunit is used to obtain the meteorological protection level of the slope collapse area according to the meteorological information; The safety protection level determination subunit is used to combine the hazard level and the protection level to obtain the safety protection level; The security protection level determination subunit is provided with a calculation formula for the security protection level, and the calculation formula for the security protection level is as follows: L = kA + cF; In the formula, L is the safety protection level, k is the first weight, c is the second weight, A is the corresponding set value of the danger level, and F is the corresponding set value of the meteorological protection level. The first weight k is greater than the second weight c, and the second weight c when the slope type is a rock slope is less than the second weight c when the slope type is a soil slope. The value of the first weight k corresponds to the safety level of the technical specification for building slope engineering.

2. The construction safety protection system based on building slope according to claim 1 is characterized in that: The meteorological protection level determination subunit obtains multipliers of precipitation, lightning and hail and corresponding risk probabilities through the meteorological information, and obtains the corresponding set value of the meteorological protection level through the corresponding relationship between the multipliers and the protection level value.

3. The construction safety protection system based on building slope according to claim 1 is characterized in that: The feedback module also marks the slope type, the meteorological information, the danger level and the meteorological protection level in the slope collapse area; The feedback module determines whether to mark the alarm information based on the comparison result between the security protection level and the level threshold.

4. The construction safety protection system based on building slope according to any one of claims 1 to 3, characterized in that: The recognition unit includes a color recognition subunit, a texture recognition subunit and a determination subunit, wherein: The color recognition subunit is used for analyzing the spectral color difference of the set area of ​​the digital orthophoto obtained by the module, and judging whether the colors are adjacent to each other by comparing the spectral color difference with the spectral empirical threshold; The texture recognition subunit is used for analyzing the grayscale coefficient of the set area of ​​the digital orthophoto, and judging whether the texture is edge connected by comparing the grayscale coefficient with the grayscale empirical threshold; The determination subunit is used to determine a set area where both color and texture are adjacent to each other as an adjacent area.

5. The construction safety protection system based on building slope according to claim 4 is characterized in that: The color recognition subunit is provided with a calculation formula for the spectral color difference, and the calculation formula for the spectral color difference is as follows: Wherein, D is the spectral color difference, fa(i,j) is the pixel grayscale value of the i-th row and j-th column of the A image area of ​​the three-dimensional model, fb(i,j) is the pixel grayscale value of the i-th row and j-th column of the B image area of ​​the three-dimensional model, and M and N are the width and height of the set area of ​​the three-dimensional model, respectively.

6. The construction safety protection system based on building slope according to claim 4 is characterized in that: The calculation formula of the spectral color difference is set in the texture recognition subunit, and the calculation formula of the grayscale coefficient is as follows: Wherein, R is the grayscale coefficient, fa(i,j) is the grayscale value of the pixel in the i-th row and j-th column of the A image area of ​​the three-dimensional model, and fb(i,j) is the grayscale value of the pixel in the i-th row and j-th column of the B image area of ​​the three-dimensional model. is the grayscale mean of the A image area, is the grayscale mean of the B image area, and M and N are the width and height of the set area of ​​the three-dimensional model respectively.

Images