Indoor decoration engineering management method based on BIM

Abstract

The invention belongs to the technical field of engineering supervision, and particularly relates to a BIM (Building Information Modeling)-based indoor decoration engineering management method, which comprises the following steps of: 1, periodically obtaining a live-action view corresponding to a model view and having the same visual angle; the model view is obtained from a BIM model with a fixed view angle; 2, respectively setting distance measuring points corresponding to the features in the model view and the live-action view, and calculating the distance between a view finding point and the distance measuring points to respectively obtain a design size corresponding to the model view and a reference size corresponding to the live-action view; by comparing the reference size with the design size and combining view comparison and size comparison, whether the construction site is subjected to standard construction according to the BIM model or not can be reflected more accurately, and when the difference value between the design size and the reference size is larger than the first threshold value, it is indicated that the construction mode has a problem, and the construction mode is not subjected to standard construction according to the BIM model. And the features in the real scene view are not consistent with the corresponding features in the simulation view, so that an alarm instruction is generated, and the construction party is forbidden to continue to construct.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering supervision, and specifically is a method for managing interior decoration engineering based on BIM. Background Art

[0002] BIM technology is a digital tool that integrates relevant information of various projects through parametric models, and shares and transmits it throughout the entire life cycle of project planning, operation and maintenance, enabling engineering and technical personnel to correctly understand and efficiently respond to various building information, playing an important role in improving production efficiency, saving costs and shortening construction periods. BIM is not only used in construction projects, but existing interior decoration projects are also beginning to be supervised through BIM modeling.

[0003] The process of BIM supervision is to use project information, build BIM models, and then use BIM models to check the completed contents at different stages of the project, or extract detailed information for the next stage through BIM models, so as to coordinate the work of each party. BIM supervision can ensure the stable and orderly progress of the entire project, improve the efficiency of project supervision, and ensure that the project is completed on schedule;

[0004] With the application of BIM supervision in interior decoration projects, the improvement of BIM supervision system is becoming more and more important. During the interior decoration construction process, owners, supervisors and on-site managers can only judge whether the construction workers are strictly following the requirements of BIM technology in order and accurately through photo comparison. This comparison method relying on human eye recognition is not only inaccurate but also inefficient. It is difficult to discover problems in construction in the first place, which leads to failure of supervision.

[0005] To this end, the present invention provides a method for managing interior decoration projects based on BIM. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a BIM-based interior decoration project management method described in the present invention comprises the following steps:

[0008] Step 1: periodically acquiring a real view corresponding to the same viewing angle as the model view; the model view is acquired from a BIM model with a fixed viewing angle;

[0009] Step 2: Set distance measurement points in the model view and the real view respectively corresponding to the features and calculate the distance between the viewing point and the distance measurement point, and obtain the design size corresponding to the model view and the reference size corresponding to the real view respectively;

[0010] Step 3: Based on the design size and the reference size, the difference between the two is calculated; if the difference is less than the first threshold, the construction is determined to be normal and the construction continues; if the difference is greater than the first threshold, the construction is determined to be abnormal; when the construction is determined to be abnormal, an alarm instruction is output to prohibit the next step of construction;

[0011] Step 4: Obtain a first contour line corresponding to the feature in the real view, and calculate a first area of ​​the first contour line;

[0012] Step 5: Based on the ratio of the first area and the time taken to obtain the real view, determine whether the construction can be completed within the preset construction period:

[0013] When the ratio is less than the second threshold, it is determined that the construction cannot be completed within the preset construction period; otherwise, it is determined that the construction can be completed within the preset construction period.

[0014] Preferably, the viewing points in step one include real viewing points and virtual viewing points, the real viewing points are set on the feature surface; the virtual viewing points are set in a simulated view corresponding to the real viewing points; and the ranging points include real ranging points and virtual ranging points.

[0015] Preferably, the step 1 of obtaining the real view further comprises the following steps:

[0016] Establish corresponding 3D coordinate systems between BIM models and construction sites;

[0017] Select a virtual viewing point in the BIM model and record its coordinate information, obtain periodic model views from the virtual viewing point and record the corresponding viewing direction information;

[0018] According to the coordinate information of the virtual viewing point, the corresponding real-view viewing point is selected at the construction site and a monitoring device is set. According to the viewing angle information, the monitoring device is adjusted to have the same viewing angle as the model view, and the real-view view is obtained periodically.

[0019] Preferably, the cycle in step one is manually set and is a continuous time period, and a combination of multiple cycles is a preset construction period corresponding to the feature.

[0020] Preferably, the distance between the viewing point and the ranging point in the model view in step 2 is used as the design dimension; the distance between the viewing point and the ranging point in the real view is used as the reference dimension, and the reference dimension is obtained by converting the proportion of an object of a known fixed size in the real view.

[0021] Preferably, the method for determining whether the construction can be completed within the preset construction period in step 5 is:

[0022] Obtaining the preset duration, the time of obtaining the real view, and the feature completion progress;

[0023] According to the formula, the time deviation of the construction progress is calculated:

[0024]

[0025] Among them, T i is the time deviation, α is the correction coefficient, t is the preset construction period, S t is the area of ​​the characteristic contour line corresponding to the real view acquisition, S is the area of ​​the characteristic contour line corresponding to the simulated view, is the characteristic construction progress, t i Get time for real-life view;

[0026] When the calculated time deviation is a negative value, the construction cannot be completed within the preset construction period. Conversely, when the calculated time deviation is zero or a positive value, the construction can be completed within the preset construction period.

[0027] Preferably, when it is determined that the construction cannot be completed within the preset construction period, the method further includes:

[0028] Step six: obtain the second contour line corresponding to the feature in the real scene view, merge the second contour line and the first contour line into a composite contour line, and then calculate the ratio based on the composite contour line. If the ratio is still less than the second threshold, it is determined that the construction cannot be completed within the preset construction period. Otherwise, it is determined that the construction can be completed within the preset construction period.

[0029] Preferably, in step 6, a second contour line corresponding to a feature of the real view is obtained, and the second contour line satisfies that a similarity difference with the first contour line is greater than a third threshold, and similarity calculation is performed based on the second contour line and the first contour line:

[0030] When the similarity difference between the second contour line and the first contour line is less than or equal to a third threshold, the real view is determined to be an invalid real view, and the real view is acquired again;

[0031] When the similarity difference between the second contour line and the first contour line is greater than a third threshold, the real scene view is determined to be a valid real scene view;

[0032] The second contour line corresponding to the feature in the effective real scene view is merged with the first contour line to obtain a composite contour line.

[0033] Preferably, based on the end of the preset construction period, the actual consumption of the decoration materials is counted, and the waste rate of the decoration materials is calculated based on the actual consumption and the expected consumption of the decoration materials;

[0034] Obtain the estimated consumption of decoration materials stored in the BIM model;

[0035] According to the formula:

[0036]

[0037]

[0038] Among them, f i is the waste rate of a single decoration material, F i is the comprehensive waste rate of various decoration materials, Q i is the actual consumption of a single decoration material, Q j is the estimated consumption of a single decoration material, w i Indicates the weight of the waste rate of a single decoration material in the comprehensive waste rate;

[0039] The waste rate and comprehensive waste rate of decoration materials are calculated based on the formula.

[0040] Preferably, it also includes:

[0041] Step 7: Evaluate construction quality based on the comprehensive waste rate of decoration materials and time deviation;

[0042] The methods for evaluating construction quality are:

[0043] Get the time deviation T of the preset duration end i and comprehensive waste rate F;

[0044] According to the formula:

[0045] A=[100-(F×K1)]×p1+[100-|T i ×K2|]×p2

[0046] Among them, A is the construction quality score, K1 is the comprehensive waste rate deduction ratio, p1 is the weight corresponding to the comprehensive waste rate score at the end of the preset construction period, K2 is the time deviation deduction ratio, and p2 is the weight corresponding to the time deviation score at the end of the preset construction period;

[0047] Based on the calculation, the construction quality score is obtained at the end of the preset construction period.

[0048] The beneficial effects of the present invention are as follows:

[0049] 1. The present invention discloses a method for managing interior decoration projects based on BIM. By obtaining the design dimensions of virtual distance measuring points and virtual viewing points in the BIM model, and comparing the reference dimensions of physical distance measuring points and real viewing points in the real view obtained at the construction site, the corresponding dimension relationship can be obtained. By combining view comparison and dimension comparison, the dimension relationship of the structures can be judged while the relative position relationship of each structure is monitored, so as to more accurately reflect whether the construction site is constructed in accordance with the BIM model. When the difference between the design dimension and the reference dimension is greater than a first threshold value, it indicates that there is a problem with the construction method, resulting in the inconsistency between the features in the real view and the corresponding features in the simulation view, thereby generating an alarm instruction to prohibit the construction party from continuing the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described below in conjunction with the accompanying drawings.

[0051] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0052] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0053] like Figure 1 As shown, a BIM-based interior decoration project management method according to an embodiment of the present invention comprises the following steps:

[0054] Step 1: periodically acquiring a real view corresponding to the same viewing angle as the model view; the model view is acquired from a BIM model with a fixed viewing angle;

[0055] Step 2: Set distance measurement points in the model view and the real view respectively corresponding to the features and calculate the distance between the viewing point and the distance measurement point, and obtain the design size corresponding to the model view and the reference size corresponding to the real view respectively;

[0056] Step 3: Based on the design size and the reference size, the difference between the two is calculated; if the difference is less than the first threshold, the construction is determined to be normal and the construction continues; if the difference is greater than the first threshold, the construction is determined to be abnormal; when the construction is determined to be abnormal, an alarm instruction is output to prohibit the next step of construction;

[0057] Step 4: Obtain a first contour line corresponding to the feature in the real view, and calculate a first area of ​​the first contour line;

[0058] Step 5: Based on the ratio of the first area and the time taken to obtain the real view, determine whether the construction can be completed within the preset construction period:

[0059] When the ratio is less than the second threshold, it is determined that the construction cannot be completed within the preset construction period; otherwise, it is determined that the construction can be completed within the preset construction period.

[0060] Existing interior decoration projects have also begun to be supervised through BIM modeling. The process of BIM supervision is to use project information, build BIM models, and then use BIM models to check the completed contents at different stages of the project, or extract detailed information for the next stage through BIM models to coordinate their respective responsibilities. BIM supervision can ensure the stable and orderly progress of the entire project, improve the efficiency of project supervision, and ensure that the project is completed on schedule. With the application of BIM supervision in interior decoration projects, the improvement of BIM supervision systems is becoming more and more important. During the interior decoration construction process, owners, supervisors and on-site managers can only judge whether the construction personnel are strictly following the requirements of BIM technology in order and accurately through photo comparison. This comparison method that relies on human eye recognition is not only inaccurate, but also inefficient. It is difficult to find problems in the construction at the first time, which leads to failure of supervision.

[0061] In one embodiment of the present invention, by setting virtual viewing points and real viewing points in the BIM model and the construction site accordingly, and obtaining the model view and the real view from the same perspective, in the subsequent supervision process, it is only necessary to compare the model view and the real view to find out the similarities and differences between the BIM model and the construction site, thereby helping to determine whether the construction site is constructed in accordance with the BIM model. The comparison between the design dimensions and reference dimensions corresponding to the features is to set virtual distance measuring points on the surface of the structure model in the model view, and by obtaining the design dimensions of the virtual distance measuring points and the virtual viewing points in the BIM model, and by comparing the reference dimensions of the physical distance measuring points and the real viewing points in the real view obtained at the construction site, the corresponding size relationship can be obtained. Combining view comparison and size comparison, the relative position relationship of each structure can be monitored. At the same time, the dimensional relationship of the structure is judged, so as to more accurately reflect whether the construction site is constructed in accordance with the BIM model. When the difference between the design size and the reference size is greater than the first threshold, it means that there is a problem with the construction method, specifically that the construction party has not controlled the size gap according to the requirements, such as the size gap, resulting in the feature in the real view being inconsistent with the corresponding feature in the simulation view, thereby generating an alarm instruction to prohibit the construction party from continuing construction. In addition, the above-mentioned calculation based on the difference between the design size and the reference size corresponds to whether there are defects in the construction method of the construction party. Specifically, it also includes the judgment of the construction progress of the construction party. Based on the acquisition of the first contour line of the feature in the real view and the acquisition of the construction time, it can be predicted whether the construction party can complete the project within the preset construction period, thereby improving the supervision of the construction party with the assistance of the BIM model; wherein the feature refers to decorative items, such as tiles.

[0062] In one embodiment, the viewing points in step one include real viewing points and virtual viewing points, wherein the real viewing points are arranged on a feature surface; the virtual viewing points are arranged in a simulated view corresponding to the real viewing points; and the ranging points include real ranging points and virtual ranging points.

[0063] As an embodiment of the present invention, based on the above, the reference size of the feature in the real view is compared with the design size of the feature in the simulation view, specifically including controlling the viewpoints in the real view and the simulation view to be consistent, that is, the real view viewpoint and the virtual viewpoint are both based on the feature surface, and then controlling the distance measurement point to be based on the feature surface. Correspondingly, a physical distance measurement point is set corresponding to the feature surface in the construction site, and the position of the virtual distance measurement point is selected with reference to the structure model itself, and the physical distance measurement point is also determined on the feature based on this reference, that is, the position of the virtual distance measurement point and the position of the physical distance measurement point are only related to the structure, but not to the coordinates, which can intuitively reflect the construction progress and construction details of the feature, so as to judge whether the construction method of the construction party is normal based on the design size and the reference size;

[0064] For example, for indoor tiling decoration, assuming that the existing area A needs to be tiled, the simulation view in the BIM model includes the number of tiles in area A and the specific distribution of the tiles. In the actual construction site and the real-life view obtained by the monitoring instrument, the simulation view can be used for comparison. In order to avoid the problem of poor recognition accuracy of the human eye, the viewing angle and the distance measuring point are set. For example, the viewing angle is set at any corner point of the first tile attached in area A, and the distance measuring point is set at any corner point of the last tile attached in area A. Correspondingly, the corresponding viewing angle and distance measuring point are obtained in both the real-life view and the simulation view. Take the real-life connection lines and virtual connection lines, convert the virtual connection lines into design dimensions, and convert the real-life connection lines into reference dimensions. By comparing the design dimensions and the reference dimensions, you can know the time node for obtaining the real-life image and whether there are any problems with the details of the tile decoration, including the control of the gaps between tiles. If the gaps between tiles are uneven, too large or too small, they may be different from the tile distribution designed in the simulation view, resulting in reduced construction quality. Therefore, based on the above, timely discovery of problems in the details can help supervise the construction party's handling of construction quality, thereby improving construction quality.

[0065] In one embodiment, the step 1 of obtaining the real view further includes the following steps:

[0066] Establish corresponding 3D coordinate systems between BIM models and construction sites;

[0067] Select a virtual viewing point in the BIM model and record its coordinate information, obtain periodic model views from the virtual viewing point and record the corresponding viewing direction information;

[0068] According to the coordinate information of the virtual viewing point, the corresponding real-view viewing point is selected at the construction site and a monitoring device is set. According to the viewing angle information, the monitoring device is adjusted to have the same viewing angle as the model view, and the real-view view is obtained periodically.

[0069] Based on the set viewing angles, monitoring devices are installed at the construction site to obtain the viewing angle corresponding to the simulation view in the BIM model, so that the real view of the construction site can be obtained remotely. The reference dimensions corresponding to the features in the real view are then obtained based on the viewing angles and ranging points, and compared with the design dimensions corresponding to the features in the simulation view.

[0070] In one embodiment, the cycle in step 1 is manually set and is a continuous time period, and a combination of multiple cycles is a preset duration corresponding to the feature.

[0071] In one embodiment of the present invention, based on the preset construction period corresponding to the construction, multiple cycles can be set in advance according to the preset construction period. For example, if the preset construction period is M days, the cycle can be based on days, that is, within the preset construction period of 0-M days, a real-life view is obtained every day, and multiple cycles can be defined as the 1st cycle, the 2nd cycle, and up to the Mth cycle.

[0072] In one embodiment, the distance between the viewing point and the ranging point in the model view in step 2 is used as the design size; the distance between the viewing point and the ranging point in the real view is used as the reference size, and the reference size is obtained by converting the proportion of an object of a known fixed size in the real view.

[0073] Since the real-life view obtained is an image proportionally reduced in size, after obtaining the real-life view, it is also necessary to use the objects of fixed size known in the real-life view, and according to the size of the object in the real-life view, convert the actual size corresponding to the feature as the reference size, and then compare it with the design size corresponding to the feature in the simulation view; it is worth noting that, assuming that the connection between the viewing point and the distance measuring point in the obtained simulation view is not marked with specific dimensions in the BIM model, it is also necessary to convert based on the known dimensions in the simulation view.

[0074] In one embodiment, the method for determining whether the construction can be completed within the preset construction period in step 5 is:

[0075] Obtaining the preset duration, the time of obtaining the real view, and the feature completion progress;

[0076] According to the formula, the time deviation of the construction progress is calculated:

[0077]

[0078] Among them, Ti is the time deviation, α is the correction coefficient, t is the preset construction period, S t is the area of ​​the characteristic contour line corresponding to the real view acquisition, S is the area of ​​the characteristic contour line corresponding to the simulated view, is the characteristic construction progress, t i Get time for real-life view;

[0079] When the calculated time deviation is a negative value, the construction cannot be completed within the preset construction period. Conversely, when the calculated time deviation is zero or a positive value, the construction can be completed within the preset construction period.

[0080] In one embodiment of the present invention, according to the first contour line corresponding to the feature in the real view, the actual first area of ​​the first contour line can be converted, and then based on the first area and the time of obtaining the real view, it can be predicted whether the decoration project can be completed at the end of the preset construction period. By calculating the time deviation, that is, according to the first area of ​​the first contour line obtained and the acquisition time of the real view, the engineering quantity reflected by the real view and the theoretical time of completion can be calculated. Then, by calculating the difference between the acquisition time of the real view and the theoretical time, it can be judged whether the engineering quantity corresponding to the acquired real view is normal. If there is a difference, and the difference is a negative value, it means that the acquisition time of the real view is larger than the theoretical time, that is, the time consumed by the engineering quantity corresponding to the real view is larger than the theoretical time, so the decoration project cannot be completed within the preset construction period. In addition, the above-mentioned time deviation formula can also be transformed as follows:

[0081]

[0082]

[0083]

[0084] Finally, the ratio of the area of ​​the first contour line in the real view to the time of acquiring the real view is obtained. , it means that the engineering progress reflected by the real view is less than the theoretical engineering progress, that is, the time consumed by the engineering quantity corresponding to the real view is larger than the theoretical time. The ratio of the time taken to obtain the first area and the real view, is the threshold value;

[0085] It is worth noting that, assuming that the current tile decoration in area A has a total area of ​​20m 2 The preset construction period is 10 days, and the area of ​​tiles attached corresponding to the Mth cycle of obtaining the real view is 10m 2 , where the Mth cycle is assumed to be the 8th day, then the above formula is used for calculation:

[0086]

[0087] Based on the above calculation, the time deviation is -3 days, which means that the current construction progress cannot be completed by the end of the preset construction period. Necessarily, since the time deviation obtained by the current calculation is already a negative value, if the construction is to be completed by the end of the preset construction period, the labor force can be increased to speed up the construction progress while ensuring the construction quality.

[0088] In one embodiment, when it is determined that the construction cannot be completed within the preset construction period, the method further includes:

[0089] Step six: obtain the second contour line corresponding to the feature in the real scene view, merge the second contour line and the first contour line into a composite contour line, and then calculate the ratio based on the composite contour line. If the ratio is still less than the second threshold, it is determined that the construction cannot be completed within the preset construction period. Otherwise, it is determined that the construction can be completed within the preset construction period.

[0090] Based on the above, when the ratio of the area of ​​the first contour line in the real view to the time of acquiring the real view is less than the threshold, it means that the construction cannot be completed within the preset construction period. However, in the stage of acquiring the real view, there may be obstacles blocking the way, resulting in gaps in the acquisition of the first contour line. For example, when acquiring the real view, the construction personnel are in the picture and block some features, or there are some equipment blocking the way, resulting in gaps in the acquisition of the first contour line. Based on the above, in one embodiment of the present invention, when it is determined that the construction cannot be completed within the preset construction period, it is necessary to re-acquire the second contour line. The second contour line is extracted from the real view acquired at an interval of unit time. For example, the first contour line is acquired at n in the Mth cycle, and the second contour line is acquired at n+1 in the Mth cycle. The second contour line is merged with the first contour line to eliminate the problem of gaps in the first contour line caused by obstacles blocking the way when acquiring the real view. Based on the synthesized contour line, the ratio and the second threshold are judged again. If the ratio is still less than the second threshold, it is determined that the construction cannot be completed within the preset construction period.

[0091] In one embodiment, in step 6, a second contour line corresponding to a feature of the real view is obtained, and the second contour line satisfies that a similarity difference with the first contour line is greater than a third threshold, and similarity calculation is performed based on the second contour line and the first contour line:

[0092] When the similarity difference between the second contour line and the first contour line is less than or equal to a third threshold, the real view is determined to be an invalid real view, and the real view is acquired again;

[0093] When the similarity difference between the second contour line and the first contour line is greater than a third threshold, the real scene view is determined to be a valid real scene view;

[0094] The second contour line corresponding to the feature in the effective real scene view is merged with the first contour line to obtain a composite contour line.

[0095] Based on the above, if the similarity difference between the second contour line obtained at n+1 of the Mth cycle and the first contour line is too small, that is, less than the third threshold, it means that the second contour line obtained at n+1 of the Mth cycle is too different from the first contour line obtained at n of the Mth cycle, that is, the obstacle may still exist. The real scene view corresponding to the second contour line obtained at this time is an invalid real scene view. Therefore, it is necessary to obtain the real scene view at n+2 of the Mth cycle, and extract the second contour line in the real scene view until the similarity difference between the second contour line and the first contour line is greater than the third threshold. At this time, it means that the real scene view corresponding to the second contour line is a valid real scene view, that is, the obstacle in the real scene view has been removed. The second contour line and the first contour line in the valid real scene view are merged into a synthetic contour line, which is conducive to eliminating the judgment error problem caused by the gap in the first contour line; it is worth noting that the similarity calculation is calculated using the correlation or consistency between the curves.

[0096] In one embodiment, based on the end of the preset construction period, the actual consumption of the decoration materials is counted, and the waste rate of the decoration materials is calculated based on the actual consumption and the expected consumption of the decoration materials;

[0097] Obtain the estimated consumption of decoration materials stored in the BIM model;

[0098] According to the formula:

[0099]

[0100]

[0101] Among them, f i is the waste rate of a single decoration material, F i is the comprehensive waste rate of various decoration materials, Q i is the actual consumption of a single decoration material, Q j is the estimated consumption of a single decoration material, w i Indicates the weight of the waste rate of a single decoration material in the comprehensive waste rate;

[0102] The waste rate and comprehensive waste rate of decoration materials are calculated based on the formula.

[0103] By using the simulation view in the BIM model and the real view obtained by the monitoring instrument, the dynamics of the construction can be reflected remotely. Based on the simulation view in the BIM model, the estimated consumption of decoration materials is pre-stored. At the end of the preset construction period, the waste rate of decoration materials can be calculated based on the estimated consumption and the actual consumption. If the waste rate is too high, it reflects that there is waste or material theft in the construction process, resulting in increased decoration costs. In one embodiment of the present invention, the material waste rate of the decoration project is obtained based on the estimated consumption and the actual consumption of the decoration materials stored in the BIM model. Based on the size of the waste rate, the expenditure of decoration materials can be reflected, and the construction cost can be calculated based on the expenditure of decoration materials. It is worth noting that the actual consumption of the decoration materials is obtained by recording the amount of materials received by the construction party in the background and summarizing them at the end of the preset construction period. In addition, during the construction of the decoration project, the estimated consumption of decoration materials Q can also be used. j Evaluate whether the project can be completed within the preset construction period. For example, when the preset construction period is approaching, but the actual consumption of decoration materials Q i Much lower than expected consumption Q j , there are two possibilities: first, the decoration project has the possibility of lowering the construction standards during the construction process; second, the decoration project fails to be constructed according to the preset construction period, that is, the decoration project cannot be completed at the end of the preset construction period;

[0104] Based on the above, when the preset construction period is approaching, the actual consumption of decoration materials Q i Much lower than expected consumption Q j , and the decoration project can be completed within the preset construction period, then there is a possibility of lowering the construction standards of the project. Based on this, the supervision ability of the construction party should be improved.

[0105] In one embodiment, it further includes:

[0106] Step 7: Evaluate construction quality based on the comprehensive waste rate of decoration materials and time deviation;

[0107] The methods for evaluating construction quality are:

[0108] Get the time deviation T of the preset duration end i and comprehensive waste rate F;

[0109] According to the formula:

[0110] A=[100-(F×K1)]×p1+[100-|T i ×K2|]×p2

[0111] Among them, A is the construction quality score, K1 is the comprehensive waste rate deduction ratio, p1 is the weight corresponding to the comprehensive waste rate score at the end of the preset construction period, K2 is the time deviation deduction ratio, and p2 is the weight corresponding to the time deviation score at the end of the preset construction period;

[0112] Based on the calculation, the construction quality score is obtained at the end of the preset construction period.

[0113] As mentioned above, when the project is completed, the actual consumption of decoration materials is Q i Much lower than expected consumption Q j , it indicates that there is a possibility of lowering the construction standards of the decoration project, that is, the calculated waste rate is a negative value. Based on this, when the waste rate is a negative value, the construction quality will also be reduced. Therefore, based on the calculation of the comprehensive waste rate of the construction party's decoration materials and the time deviation of the construction party's construction progress, the construction quality of the construction party can be reflected. As an embodiment of the present invention, the construction quality score of the construction party corresponding to this decoration project is obtained based on the calculation formula, which serves as the basis for evaluating the construction quality of different construction parties, which is conducive to managing the construction parties.

[0114] Working principle: By setting up virtual and real-life viewpoints in the BIM model and the construction site, and obtaining the model view and the real-life view from the same perspective, in the subsequent supervision process, you only need to compare the model view and the real-life view to find out the similarities and differences between the BIM model and the construction site, so as to help determine whether the construction site is constructed in accordance with the BIM model. The comparison between the design dimensions and reference dimensions corresponding to the features is to set virtual distance measuring points on the surface of the structure model in the model view, obtain the design dimensions of the virtual distance measuring points and the virtual viewpoints in the BIM model, and compare the reference dimensions of the physical distance measuring points and the real-life viewpoints in the real-life view obtained at the construction site, so as to obtain the corresponding size relationship. By combining view comparison and size comparison, you can monitor the relative size of each structure. The dimensional relationship of the structure is judged at the same time as the position relationship, so as to more accurately reflect whether the construction site is constructed in accordance with the BIM model. When the difference between the design dimension and the reference dimension is greater than the first threshold, it means that there is a problem with the construction method, specifically, the construction party has not controlled the size gap according to the requirements, such as the size gap, resulting in the feature in the real view being inconsistent with the corresponding feature in the simulation view, thereby generating an alarm instruction to prohibit the construction party from continuing construction. In addition, the above-mentioned calculation based on the difference between the design dimension and the reference dimension corresponds to whether there are defects in the construction method of the construction party. Specifically, it also includes the judgment of the construction progress of the construction party. Based on the acquisition of the first contour line of the feature in the real view and the acquisition of the construction time, it can be predicted whether the construction party can complete the project within the preset construction period, thereby improving the supervision of the construction party with the assistance of the BIM model.

[0115] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for monitoring interior decoration projects based on BIM, characterized by: The following steps are involved: Step 1: periodically acquiring a real view corresponding to the same viewing angle as the model view; the model view is acquired from a BIM model with a fixed viewing angle; Step 2: Set distance measurement points in the model view and the real view respectively corresponding to the features and calculate the distance between the viewing point and the distance measurement point, and obtain the design size corresponding to the model view and the reference size corresponding to the real view respectively; Step 3: Based on the design size and the reference size, the difference between the two is calculated; if the difference is less than the first threshold, the construction is determined to be normal and the construction continues; if the difference is greater than the first threshold, the construction is determined to be abnormal; when the construction is determined to be abnormal, an alarm instruction is output to prohibit the next step of construction; Step 4: Obtain a first contour line corresponding to the feature in the real view, and calculate a first area of ​​the first contour line; Step 5: Based on the ratio of the first area and the time taken to obtain the real view, determine whether the construction can be completed within the preset construction period: When the ratio is less than the second threshold, it is determined that the construction cannot be completed within the preset construction period; otherwise, it is determined that the construction can be completed within the preset construction period.

2. A method for monitoring interior decoration projects based on BIM according to claim 1, characterized in that: The viewing points in step 1 include real viewing points and virtual viewing points, wherein the real viewing points are arranged on the feature surface; the virtual viewing points are arranged in a simulated view corresponding to the real viewing points; and the distance measuring points include real distance measuring points and virtual distance measuring points.

3. A method for monitoring interior decoration projects based on BIM according to claim 1, characterized in that: The step 1 of obtaining the real view also includes the following steps: Establish corresponding 3D coordinate systems between BIM models and construction sites; Select a virtual viewing point in the BIM model and record its coordinate information, obtain periodic model views from the virtual viewing point and record the corresponding viewing direction information; According to the coordinate information of the virtual viewing point, the corresponding real-view viewing point is selected at the construction site and a monitoring device is set. According to the viewing angle information, the monitoring device is adjusted to have the same viewing angle as the model view, and the real-view view is obtained periodically.

4. A method for monitoring interior decoration projects based on BIM according to claim 1, characterized in that: The cycle in step 1 is manually set and is a continuous time period. The combination of the beginning and the end of multiple cycles is a preset duration corresponding to the feature.

5. The method for monitoring interior decoration projects based on BIM according to claim 1 is characterized by: The distance between the viewing point and the distance measuring point in the model view in step 2 is used as the design size; the distance between the viewing point and the distance measuring point in the real view is used as the reference size, and the reference size is obtained by converting the proportion of an object of a known fixed size in the real view.

6. The method for monitoring interior decoration projects based on BIM according to claim 1 is characterized by: The method for determining whether the construction can be completed within the preset construction period in step 5 is: Obtaining the preset duration, the time of obtaining the real view, and the feature completion progress; According to the formula, the time deviation of the construction progress is calculated: Among them, T i is the time deviation, α is the correction coefficient, t is the preset construction period, S t is the area of ​​the characteristic contour line corresponding to the real view acquisition, S is the area of ​​the characteristic contour line corresponding to the simulated view, is the characteristic construction progress, t i Get time for real-life view; When the calculated time deviation is a negative value, the construction cannot be completed within the preset construction period. Conversely, when the calculated time deviation is zero or a positive value, the construction can be completed within the preset construction period.

7. The method for monitoring interior decoration projects based on BIM according to claim 1 is characterized by: When it is determined that the construction cannot be completed within the preset construction period, it also includes: Step six: obtain the second contour line corresponding to the feature in the real scene view, merge the second contour line and the first contour line into a composite contour line, and then calculate the ratio based on the composite contour line. If the ratio is still less than the second threshold, it is determined that the construction cannot be completed within the preset construction period. Otherwise, it is determined that the construction can be completed within the preset construction period.

8. A method for monitoring interior decoration projects based on BIM according to claim 7, characterized in that: In step 6, a second contour line corresponding to the feature of the real view is obtained, and the second contour line satisfies that the similarity difference with the first contour line is greater than a third threshold, and similarity calculation is performed based on the second contour line and the first contour line: When the similarity difference between the second contour line and the first contour line is less than or equal to a third threshold, the real view is determined to be an invalid real view, and the real view is acquired again; When the similarity difference between the second contour line and the first contour line is greater than a third threshold, the real scene view is determined to be a valid real scene view; The second contour line corresponding to the feature in the effective real scene view is merged with the first contour line to obtain a composite contour line.

9. The method for monitoring interior decoration projects based on BIM according to claim 1 is characterized by: Upon completion of the preset construction period, the actual consumption of decoration materials is counted, and the waste rate of decoration materials is calculated based on the actual consumption and estimated consumption of decoration materials; Obtain the estimated consumption of decoration materials stored in the BIM model; According to the formula: Among them, f i is the waste rate of a single decoration material, F i is the comprehensive waste rate of various decoration materials, Q i is the actual consumption of a single decoration material, Q j is the estimated consumption of a single decoration material, w i Indicates the weight of the waste rate of a single decoration material in the comprehensive waste rate; The waste rate and comprehensive waste rate of decoration materials are calculated based on the formula.

10. The method for monitoring interior decoration projects based on BIM according to claim 1 is characterized by: Also includes: Step 7: Evaluate construction quality based on the comprehensive waste rate of decoration materials and time deviation; The methods for evaluating construction quality are: Get the time deviation T of the preset duration end i and comprehensive waste rate F; According to the formula: A=[100-(F×K1)]×p1+[100-|T i ×K2|]×p2 Among them, A is the construction quality score, K1 is the comprehensive waste rate deduction ratio, p1 is the weight corresponding to the comprehensive waste rate score at the end of the preset construction period, K2 is the time deviation deduction ratio, and p2 is the weight corresponding to the time deviation score at the end of the preset construction period; Based on the calculation, the construction quality score is obtained at the end of the preset construction period.

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