A BIM-based interior decoration project management method

Abstract

The present invention belongs to the technical field of project supervision, and specifically is a BIM-based interior decoration project management method, comprising: step one: periodically obtaining a real view corresponding to the same perspective of a model view; the model view is obtained from a BIM model with a fixed perspective; step two: respectively setting distance measurement points corresponding to features in the model view and the real view and calculating the distance between the view point and the distance measurement point, thereby obtaining the design size corresponding to the model view and the reference size of the real view; by comparing the reference size with the design size, combining view comparison and size comparison, it is possible 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 a first threshold, it indicates that there is a problem with the construction method, resulting in the feature in the real view not matching the corresponding feature in the simulation view, thereby generating an alarm instruction and prohibiting the construction party from continuing construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering supervision, and specifically is a method for managing interior decoration projects 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 have also begun to be supervised through BIM modeling.

[0003] The process of BIM supervision is to use project information to build a BIM model. Then, at different stages of the project, the BIM model is used to verify the completed content, or to extract detailed information for the next stage through the BIM model, 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 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 sequence 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 time, which leads to failure of supervision.

[0005] To this end, the present invention provides a BIM-based interior decoration project management method. 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 includes the following steps:

[0008] Step 1: Periodically obtain a real-life view corresponding to the same perspective as the model view; the model view is obtained from a BIM model with a fixed perspective;

[0009] Step 2: Set distance measurement points corresponding to features in the model view and the real view respectively and calculate the distance between the view point and the distance measurement points to 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 dimensions and the reference dimensions, the difference between the two is calculated. If the difference is less than a first threshold, the construction is determined to be normal and construction continues. If the difference is greater than the first threshold, the construction is determined to be abnormal. If 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 scene 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 from 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, and 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 includes the following steps:

[0016] Establish corresponding 3D coordinate systems between the BIM model and the construction site;

[0017] Select a virtual viewing point in the BIM model and record its coordinate information. Then, 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 1 is manually set and is a continuous time period, and a combination of the beginning and the end of multiple cycles constitutes 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 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.

[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 progress of feature completion;

[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 feature contour line corresponding to the real view acquisition, S is the area of ​​the feature contour line corresponding to the simulated view, is the characteristic construction progress, t i Get time for real 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 6: Obtain a second contour line corresponding to the feature in the real-life view, merge the second contour line with the first contour line into a composite contour line, and then calculate a 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 in 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 decoration materials is counted, and the waste rate of decoration materials is calculated based on the actual consumption and expected consumption of 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 type of 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 at the end of the preset duration 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] Obtain a construction quality score at the end of the preset construction period based on calculations.

[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 measurement points and virtual viewing points in the BIM model, and comparing the reference dimensions of the physical distance measurement points and the real viewing points in the real view obtained at the construction site, the corresponding dimension relationships can be obtained. By combining view comparison and dimension comparison, the dimension relationships of the structures can be judged while monitoring the relative positional relationships of the structures. This can 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, it indicates that there is a problem with the construction method, resulting in a discrepancy 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 construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described below with reference to 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 easier to understand, the present invention is further described 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 includes the following steps:

[0054] Step 1: Periodically obtain a real-life view corresponding to the same perspective as the model view; the model view is obtained from a BIM model with a fixed perspective;

[0055] Step 2: Set distance measurement points corresponding to features in the model view and the real view respectively and calculate the distance between the view point and the distance measurement points to 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 dimensions and the reference dimensions, the difference between the two is calculated. If the difference is less than a first threshold, the construction is determined to be normal and construction continues. If the difference is greater than the first threshold, the construction is determined to be abnormal. If 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 scene 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 from 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 are also beginning to be supervised through BIM modeling. The BIM supervision process involves using project information to build a BIM model. At different stages of the project, the BIM model is used to verify completed content or extract detailed information for the next stage through the BIM model, allowing for collaborative work within their respective responsibilities. BIM supervision can ensure the stable and orderly progress of the entire project, improve project supervision efficiency, and ensure timely completion. With the application of BIM supervision in interior decoration projects, the improvement of BIM supervision systems is becoming increasingly important. During interior decoration construction, owners, supervisors, and on-site managers can only determine whether construction workers are strictly following BIM technology requirements, performing construction in an orderly and accurate manner, through photo comparison. This comparison method, which relies on human visual recognition, is not only inaccurate and inefficient, but also difficult to detect construction problems immediately, resulting in ineffective 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 respectively, 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 obtain the design dimensions of the virtual distance measuring points and the virtual viewing points in the BIM model, and compare the physical distance measuring points and the reference dimensions of the real viewing points in the real view obtained at the construction site to obtain the corresponding size relationship. By 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 followed the requirements, such as controlling the size gap, resulting in the features in the real view and the corresponding features in the simulation view not matching, thereby generating an alarm instruction to prohibit the construction party from continuing construction. In addition, the above calculation based on the difference between the design size and the reference size corresponds to whether there are flaws 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 point in step 1 includes a real viewing point and a virtual viewing point, wherein the real viewing point is set on the feature surface; the virtual viewing point is set in a simulated view corresponding to the real viewing point; and the ranging point includes a real ranging point and a virtual ranging point.

[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 as a reference, and then controlling the distance measurement points to be based on the feature surface as a reference. Correspondingly, physical distance measurement points are set corresponding to the feature surface in the construction site. The position of the virtual distance measurement point is selected based on the structure model itself as a reference, 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 and have nothing to do with the coordinates. This can intuitively reflect the construction progress and construction details of the feature, and thus judge whether the construction method of the builder is normal based on the design size and the reference size.

[0064] For example, for indoor tile 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 device, 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 point when the real-life image was obtained 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 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 the BIM model and the construction site;

[0067] Select a virtual viewing point in the BIM model and record its coordinate information. Then, 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 up. 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, monitors are installed at the construction site to obtain the viewing angle corresponding to the simulated view in the BIM model, so that the real view of the construction site can be obtained remotely. Then, based on the viewing angles and ranging points, the reference dimensions corresponding to the features in the real view are obtained and compared with the design dimensions corresponding to the features in the simulated view.

[0070] In one embodiment, the cycle in step 1 is manually set and is a continuous time period, and a combination of the beginning and the end of multiple cycles constitutes 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 first cycle, the second 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 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 objects 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 if the line between the view point and the distance measurement point in the obtained simulation view is not marked with specific size in the BIM model, it also needs to be converted based on the known size 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 progress of feature completion;

[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 feature contour line corresponding to the real view acquisition, S is the area of ​​the feature contour line corresponding to the simulated view, is the characteristic construction progress, t i Get time for real 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, the actual first area of ​​the first contour line can be converted based on the first contour line corresponding to the feature in the real view. Then, based on the first area and the time when the real view was acquired, 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, based on the first area of ​​the acquired first contour line and the acquisition time of the real view, the theoretical amount of work 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 determined whether the amount of work 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 longer than the theoretical time, that is, the time consumed for the amount of work corresponding to the real view is longer than the theoretical time, and therefore the decoration project cannot be completed within the preset construction period. In addition, the above-mentioned time deviation formula can also be modified 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 obtaining the real view is obtained. When , 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 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 the 8th day, then the calculation is based on the above formula:

[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 6: Obtain a second contour line corresponding to the feature in the real-life view, merge the second contour line with the first contour line into a composite contour line, and then calculate a 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 indicates that the construction cannot be completed within the preset construction period. However, during the real view acquisition stage, there may be obstacles blocking the construction, resulting in gaps in the acquisition of the first contour line. For example, when acquiring the real view, the construction workers are in the picture and block some features, or there are some equipment blocking the construction, 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 intervals of unit time. For example, the first contour line is acquired at time n of the Mth cycle, and the second contour line is acquired at time n+1 of 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 construction when acquiring the real view. Based on the synthesized contour line, the ratio is judged against the second threshold. 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 in 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 indicates 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, upon completion of the preset construction period, actual consumption of decoration materials is counted, and a waste rate of decoration materials is calculated based on the actual consumption and estimated consumption of 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 type of 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 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 actual consumption. If the waste rate is too high, it reflects that there is waste or material theft during 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 actual consumption of 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 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, it can also be based on the estimated consumption Q of decoration materials. 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 Far lower than the expected consumption Q j , there are two possibilities: first, the construction standards of the decoration project may be lowered 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 analysis of the preset construction period is approaching, the actual consumption of decoration materials Q i Far lower than the 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 at the end of the preset duration 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] Obtain a construction quality score at the end of the preset construction period based on calculations.

[0113] As mentioned above, when the project is completed, the actual consumption of decoration materials Q i Far lower than the 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 negative, 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 the management of 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, it is only necessary 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, and 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 to obtain the corresponding size relationship. By combining view comparison and size comparison, the relative size of each structure can be monitored. 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 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 followed the requirements, such as controlling the size gap, resulting in the features in the real view and the corresponding features in the simulation view not matching, 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 flaws 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 basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A BIM-based interior decoration project supervision method, characterized by: The following steps are involved: Step 1: Periodically obtain a real-life view corresponding to the same perspective as the model view; the model view is obtained from a BIM model with a fixed perspective; Step 2: Set distance measurement points corresponding to features in the model view and the real view respectively and calculate the distance between the view point and the distance measurement points to 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 dimensions and the reference dimensions, the difference between the two is calculated. If the difference is less than a first threshold, the construction is determined to be normal and construction continues. If the difference is greater than the first threshold, the construction is determined to be abnormal. If 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 scene 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 from 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; 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 progress of feature completion; According to the formula, the time deviation of the construction progress is calculated: ； in, is the time deviation, is the correction coefficient, For the preset duration, is the area of ​​the feature contour line corresponding to the real view acquisition, is the area of ​​the corresponding feature contour line in the model view, Characteristic construction progress, Get time for real 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. The above time deviation formula is transformed as follows: ； ； ； Finally, the ratio of the area of ​​the first contour line in the real view to the time of obtaining the real view is obtained. When , it means that the project progress reflected by the real view is less than the theoretical project progress, where The ratio of the time to obtain the first area and the real view, is the second threshold.

2. A BIM-based interior decoration project supervision method 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 set on the feature surface; the virtual viewing points are set in the model view corresponding to the real viewing points; and the ranging points include real ranging points and virtual ranging points.

3. The BIM-based interior decoration project supervision method according to claim 1 is characterized by: The step 1 of obtaining the real view further includes the following steps: Establish corresponding 3D coordinate systems between the BIM model and the construction site; Select a virtual viewing point in the BIM model and record its coordinate information. Then, 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. The BIM-based interior decoration project supervision method according to claim 1 is characterized by: 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 constitutes the preset duration corresponding to the feature.

5. The BIM-based interior decoration project supervision method according to claim 1 is characterized by: 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 known fixed size in the real view.

6. The BIM-based interior decoration project supervision method according to claim 1 is characterized by: When it is determined that the construction cannot be completed within the preset construction period, the following steps are also included: Step 6: Obtain a second contour line corresponding to the feature in the real-life view, merge the second contour line with the first contour line into a composite contour line, and then calculate a 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.

7. The BIM-based interior decoration project supervision method according to claim 6 is characterized by: 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: 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.

8. The BIM-based interior decoration project supervision method according to claim 1 is characterized by: Upon completion of the preset construction period, actual consumption of decoration materials is counted, and a waste rate of decoration materials is calculated based on the actual consumption and expected consumption of decoration materials; Obtain the estimated consumption of decoration materials stored in the BIM model; According to the formula: ； ； in, is the waste rate of a single decoration material, is the comprehensive waste rate of various decoration materials, is the actual consumption of a single type of decoration material, is the estimated consumption of a single type of decoration material, 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.

9. The BIM-based interior decoration project supervision method according to claim 8 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 of the preset duration and comprehensive waste rate ; According to the formula: ； in, Score the construction quality. The deduction ratio for the comprehensive waste rate is: The weight corresponding to the comprehensive waste rate score at the end of the preset construction period, The time deviation deduction ratio, The weight corresponding to the time deviation score at the end of the preset construction period; Obtain a construction quality score at the end of the preset construction period based on calculations.

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