An engineering scheme generation system for precast composite slabs based on Web and BIM

Abstract

The present invention relates to the field of building digitalization, and in particular to a prefabricated composite slab engineering scheme generation system based on Web and BIM, comprising a first client, a data center, and a second client. The first client and the second client are both connected to the data center through web network communication. The first client is used to upload a composite slab layout drawing to obtain composite slab layout data and send the composite slab layout data to the data center. The data center is used to construct a composite slab BIM three-dimensional model based on the composite slab layout data, and determine the composite slab concrete demand data and steel demand data based on the composite slab BIM three-dimensional model. The data center is also used to send the composite slab BIM three-dimensional model, concrete demand data, and steel demand data to the second client. It can effectively improve the effectiveness and accuracy of information transmission between material purchasers and composite slab producers.

Description

Technical Field

[0001] The present invention relates to the field of building digitization, and more particularly, to a precast composite slab engineering solution generation system based on Web and BIM. Background Art

[0002] In the modern construction industry, digital technologies are becoming increasingly popular. Currently, in the customization of building materials (e.g., the customization of composite slabs), the purchaser still needs to send the designed drawings to the manufacturer first, and then the manufacturer proceeds with production. However, in this process, a large amount of time is often consumed in the preliminary communication. Sometimes, the purchaser also needs to dispatch special commissioners to the manufacturer for on-site communication and supervision to ensure the precise progress of building material production, which results in very high communication costs for both parties and is likely to affect the timeliness of product delivery.

[0003] In view of this, the present application is specifically proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a precast composite slab engineering solution generation system based on Web and BIM, which can effectively improve the effectiveness and accuracy of information transmission between the building material purchaser and the composite slab manufacturer, and can help the composite slab manufacturer shorten the production preparation time, thus effectively improving the timeliness of product delivery.

[0005] The embodiments of the present invention are implemented as follows:

[0006] A precast composite slab engineering solution generation system based on Web and BIM includes: a first client, a data center, and a second client. Both the first client and the second client are communicatively connected to the data center via a web network.

[0007] The first client is used to upload the composite slab layout drawing to obtain the composite slab layout data and send the composite slab layout data to the data center.

[0008] The data center is used to construct a composite slab BIM three-dimensional model based on the composite slab layout data, and determine the composite slab concrete demand data and steel bar demand data according to the composite slab BIM three-dimensional model. The data center is also used to send the composite slab BIM three-dimensional model, the concrete demand data, and the steel bar demand data to the second client.

[0009] Among them, the first client is used by the building material purchaser, and the second client is used by the composite slab manufacturer.

[0010] Further, the composite slab layout data includes: a feature code sequence.

[0011] When the first client obtains the feature code sequence, it executes an identification process. The identification process includes the following steps:

[0012] S1. Place the layout drawing of the composite slab into a reference plane and randomly generate a reference point within the reference plane.

[0013] S2. Determine the respective rectangular regions corresponding to the composite slabs in the layout drawing of the composite slab, and select one rectangular region as the recognition object.

[0014] S3. Set a moving point on the boundary of the recognition object and construct a connection line between the moving point and the reference point. During the process of the moving point moving unidirectionally along the boundary of the recognition object, every time the moving point moves a unit distance, and every time the moving point reaches each corner of the recognition object, record the length value and the angle value of the connection line. Until the moving point moves one full circle along the boundary of the recognition object.

[0015] S4. Take the other rectangular region closest to the recognition object as the new recognition object, and repeat the execution of S3 until all rectangular regions are traversed.

[0016] S5. Create a feature code sequence, and the feature code sequence includes several feature code units arranged in sequence. Save the length value and the angle value belonging to the same connection line in the same feature code unit, and sequentially save them to each feature code unit according to the generation order of the length value and the angle value.

[0017] Further, when the data center constructs a BIM three-dimensional model of the composite slab according to the composite slab layout data, it includes the following steps:

[0018] D1. Construct a sketch plane, randomly generate a reference point within the sketch plane, and take the reference point as the point corresponding to the reference point.

[0019] D2. In the feature code sequence, sequentially extract the length value and the angle value according to the order of arrangement of the feature code units, and determine the respective position points corresponding to the movement positions of the moving point within the sketch plane according to the reference point, the length value, and the angle value, and construct a composite slab sketch corresponding to each rectangular region according to the position points.

[0020] D3. Construct a BIM three-dimensional model of the composite slab according to the composite slab sketch.

[0021] Further, the reference point is located outside the range of the layout drawing of the composite slab.

[0022] Further, when setting the moving point on the boundary of the recognition object, the starting position of the moving point is a corner of the boundary of the recognition object.

[0023] Further, the first client is also used to determine whether there is a situation where the boundary parts of the rectangular regions overlap according to the feature code sequence. If so, mark the corresponding two rectangular regions as a fitting relationship, otherwise mark them as a spaced relationship.

[0024] The first client is also used to verify the fitting relationship and spacing relationship between the rectangular areas with the material purchaser. If the verification is correct, the laminated slab layout data is sent to the data center.

[0025] Furthermore, the first client is also used to verify each identified rectangular area with the material purchaser. If the verification is correct, the laminated slab layout data is sent to the data center.

[0026] Furthermore, the first client is also used to save the feature code sequence. The data center is also used to send the feature code sequence to the second client for the laminated slab manufacturer to determine the matching relationship with the material purchaser through the feature code sequence.

[0027] Furthermore, the first client is also used to determine the hoisting workload of the laminated slab according to the specific value of the unit distance and the length of the feature code sequence.

[0028] The first client stores a reference threshold. When the hoisting workload of the laminated slab is greater than the reference threshold, a prompt is sent to the material purchaser.

[0029] Furthermore, in D2, when the data center determines each position point, if the distance between two adjacent position points is greater than the unit distance, a data error prompt is issued.

[0030] The beneficial effects of the technical solution of the embodiment of the present invention include:

[0031] The prefabricated laminated slab engineering solution generation system based on Web and BIM provided by the embodiment of the present invention transfers the confirmation work of the laminated slab BIM three-dimensional model, construction, concrete demand data, and steel bar demand data to the data center by setting up the data center, which can reduce the workload of the material purchaser and the laminated slab manufacturer, enabling the material purchaser to focus on the scheme design and the laminated slab manufacturer to focus on product production. The data center is maintained by a dedicated supplier, realizing specialized personnel for specialized matters, which can effectively improve the accuracy of procurement information transmission.

[0032] Generally speaking, the prefabricated laminated slab engineering solution generation system based on Web and BIM provided by the embodiment of the present invention can effectively improve the effectiveness and accuracy of information transmission between the material purchaser and the laminated slab manufacturer, and can help the laminated slab manufacturer shorten the production preparation time, effectively improving the timeliness of product delivery. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0034] Figure 1 Schematic diagram when obtaining the length value and angle value of the connection line.

[0035] Explanation of reference numerals:

[0036] 100 - Laminated board layout diagram; 200 - Reference plane; P - Reference point; y - Rectangular area; d - Moving point; L - Connection line. Specific embodiments

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] As shown in this specification and the claims, unless the context clearly presents an exceptional situation, words such as "a", "the", etc. do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only imply the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0042] The flowcharts used in this specification are used to illustrate the operations performed by the system according to the embodiments of this specification. It can be understood that the operations of each step do not necessarily need to be precisely executed in sequence. On the contrary, the steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several steps of operations can be removed from these processes.

[0043] The inventors of this application have studied and found that currently, in the customized production of laminated plates, for material purchasers and laminated plate producers, the reasons for high communication costs include, but are not limited to: the drawings sent by the material purchaser have defects, and the content of the drawings is incorrect after being opened by the laminated plate producer due to software reasons, etc. The occurrence of these situations easily leads to the need for continuous communication and confirmation between the relevant personnel of both parties. Coupled with the low effectiveness of remote communication, in actual work, it often occurs that the material purchaser needs to dispatch a special commissioner to the producer for on-site communication or on-site production guidance. This results in very high communication costs (including: time costs and labor costs) for both parties, and also directly affects the timeliness of product delivery.

[0044] To overcome the deficiencies in the prior art, this embodiment provides an assembly-type laminated plate engineering solution generation system based on Web and BIM. The system includes: a first client, a data center, and a second client.

[0045] Both the first client and the second client are communicatively connected to the data center through a web network.

[0046] The first client is used by the material purchaser. The first client is used for the material purchaser to upload the laminated plate layout drawing 100 to obtain the laminated plate layout data and send the laminated plate layout data to the data center.

[0047] The data center is used to construct a laminated plate BIM three-dimensional model according to the laminated plate layout data, and determine the laminated plate concrete demand data and steel bar demand data according to the laminated plate BIM three-dimensional model.

[0048] The data center is also used to send the laminated plate BIM three-dimensional model, the concrete demand data, and the steel bar demand data to the second client. The second client is used by the laminated plate producer, so that the laminated plate producer can directly carry out the production work of the laminated plate according to the laminated plate BIM three-dimensional model, the concrete demand data, and the steel bar demand data sent by the data center, which is more intuitive and helps to shorten the preparation time before production of the laminated plate producer.

[0049] In this solution, by setting up a data center, the confirmation work of the BIM three-dimensional model of the composite slab, the construction, the concrete demand data, and the steel bar demand data is transferred to the data center, which can reduce the workload of the material purchaser and the composite slab manufacturer, enabling the material purchaser to focus on the scheme design and the composite slab manufacturer to focus on product production. The data center is maintained by a dedicated supplier, achieving specialized personnel for specialized tasks, which can effectively improve the accuracy of procurement information transmission.

[0050] Generally speaking, the prefabricated composite slab engineering scheme generation system based on Web and BIM provided in this embodiment can effectively improve the effectiveness and accuracy of information transmission between the material purchaser and the composite slab manufacturer, and can help the composite slab manufacturer shorten the production preparation time, effectively improving the timeliness of product delivery.

[0051] It should be noted that when the data center constructs the BIM three-dimensional model of the composite slab, the steel bar layout rules of the composite slab can be preset according to actual needs.

[0052] In order to further improve the accuracy of procurement information transmission, in this embodiment, the composite slab layout data includes: a feature code sequence.

[0053] Among them, when the first client obtains the feature code sequence, it executes an identification process. The identification process includes the following steps:

[0054] S1. Place the composite slab layout drawing 100 into a reference plane 200, that is, put a two-dimensional drawing such as the composite slab layout drawing 100 into a two-dimensional plane, and randomly generate a reference point P within the reference plane 200. As Figure 1 shown.

[0055] It can be understood that the composite slab layout drawing 100 needs to be accompanied by size information about the composite slab. The size information can be recorded separately in a computer-readable form or marked in the composite slab layout drawing 100 in a computer-readable form, and is not limited to this.

[0056] The composite slab layout drawing 100 can be a cad two-dimensional drawing or a two-dimensional picture, and is not limited to this. For the case of using a cad two-dimensional drawing, the first client can identify the composite slab layout drawing 100 by using a method that can read the cad two-dimensional drawing. For the case of using a two-dimensional picture, an image recognition method can be used to identify the composite slab area in the composite slab layout drawing 100.

[0057] S2. Determine each rectangular area y corresponding to the composite slab in the composite slab layout drawing 100, and select a rectangular area y as the recognition object.

[0058] S3. Set a moving point d on the boundary of the recognition object, and construct a connection line L between the moving point d and the reference point P. During the process of the moving point d moving unidirectionally along the boundary of the recognition object, every time the moving point d moves a unit distance, and every time the moving point d reaches each corner of the recognition object, record the length value and the angle value of the connection line L. This continues until the moving point d has moved one full circle along the boundary of the recognition object. Here, the specific value of the unit distance can be flexibly set according to actual needs. The smaller the value of the unit distance, the higher the recognition accuracy. It should be noted that the angle value of the connection line L can be determined based on the two-dimensional coordinate system with the reference point P as the origin, and is not limited to this.

[0059] S4. Take another rectangular region y that is closest to the original recognition object as the new recognition object, and repeat S3 until all rectangular regions y are traversed. In this way, the length values and angle values of the connection line L when the moving point d moves on the boundaries of all rectangular regions y can be completely collected, and thus used as the representation of the rectangular region y (i.e., the layout area of the laminated plates).

[0060] S5. Create a feature code sequence, which contains several feature code units arranged in order. Save the length value and the angle value belonging to the same connection line L in the same feature code unit. It should be noted that the "same connection line L" in this application refers to the connection line L corresponding to the moving point d at the same position. When the moving point d moves along the boundary of the recognition object, the position of the moving point d changes, and the connection line L after the position change of the moving point d does not belong to the original connection line L, that is, after the position of the moving point d changes, it belongs to a different connection line L. In addition, for the moving points d on different rectangular regions y, they also do not belong to the same connection line L.

[0061] In addition, save them to each feature code unit in the order of the generation sequence of the length value and the angle value. Only one set of length value and angle value is saved in each feature code unit. That is to say, for the rectangular region y that is first used as the recognition object, the length value and the angle value of its corresponding connection line L are first saved into the feature code sequence, and for the same rectangular region y, the length value and the angle value that are first collected are first saved into the feature code sequence.

[0062] Through this design, the recognition of the laminated plate layout drawing 100 can be completed on the first client, and the graphic information of the laminated plate layout drawing 100 can be converted into feature code information. By sending the feature code sequence to the data center instead of sending the original laminated plate layout drawing 100 to the data center, the trouble caused by incorrect opening of the drawing can be avoided.

[0063] In addition, using the feature code sequence to replace the laminated plate layout drawing 100 as the information transmission carrier can effectively achieve information lightweight and reduce the transmission burden.

[0064] Correspondingly, when the data center constructs the BIM three-dimensional model of the composite slab according to the composite slab layout data, the following steps are included:

[0065] D1. Construct a sketch plane, randomly generate a reference point within the sketch plane, and use the reference point as the point corresponding to the reference point P.

[0066] D2. In the feature code sequence, extract the length value and the angle value in sequence according to the arrangement order of the feature code units, and determine the respective position points corresponding to the movement positions of the moving point d within the sketch plane based on the reference point, the length value, and the angle value. That is to say, when the data center constructs the BIM three-dimensional model of the composite slab, with the reference point as the benchmark, the length value and the angle value recorded in the feature code sequence are used to reverse the position points corresponding to the movement positions during the movement of the moving point d, so as to restore the movement situation of the moving point d in the data center. In this way, the data center can construct the composite slab sketches corresponding to the respective rectangular regions y based on these restored position points. The sizes and layouts of the composite slabs in the composite slab sketches constructed in this way are the same as those of the original composite slab layout diagram 100, thus realizing the restoration of the composite slab layout diagram 100 in the data center.

[0067] D3. Based on the composite slab sketches constructed above, the BIM three-dimensional model of the composite slab can be constructed according to the composite slab sketches.

[0068] Through this design, the data center can accurately restore the content in the composite slab layout diagram 100 according to the feature code sequence, ensuring the accuracy of modeling while realizing data lightweight.

[0069] Optionally, when generating the reference point P, the generation range of the reference point P can be restricted outside the range of the composite slab layout diagram 100.

[0070] Further optionally, when setting the moving point d on the boundary of the recognition object, the starting position of the moving point d is a corner of the boundary of the recognition object.

[0071] Furthermore, the first client is also used to determine whether there is a situation where the boundaries of the rectangular regions y partially overlap according to the feature code sequence. For example, if there is a fitting situation at the edges of two composite slabs, the boundary lines of the two rectangular regions y corresponding to the two composite slabs partially overlap. Then, during the movement of the moving point d on the boundaries of the two rectangular regions y, the moving point d will surely pass through the overlapping part of the boundary line repeatedly. In the feature code sequence, this will be reflected as some of the angle values and length values in the two rectangular regions y being exactly the same, or the positions of the moving point d corresponding to being on the same line segment.

[0072] Through the above judgment, if there is a fitting situation, the corresponding two rectangular regions y are marked as a fitting relationship; otherwise, they are marked as a spaced relationship.

[0073] The first client is also used to display and verify the fitting relationship and the spaced relationship between the rectangular regions y to the material purchaser. If the verification is correct, the laminated slab layout data is sent to the data center.

[0074] In this way, local verification of the laminated slab layout drawing 100 can be performed first on the first client. Especially in the form of uploading the laminated slab layout drawing 100 as a two-dimensional picture, local verification can effectively eliminate the errors of image recognition, thereby ensuring the accuracy of the data transmitted outward.

[0075] Furthermore, the first client is also used to display and verify each identified rectangular region y to the purchaser. If the verification is correct, the laminated slab layout data is sent to the data center. By verifying each identified rectangular region y, it can effectively avoid the omission of the rectangular region y during the recognition process and the misrecognition of the position of the rectangular region y during the recognition. When the quantity and position of the rectangular region y are both correct, the recognition of the quantity and position of the laminated slabs is correspondingly correct. The rectangular region y is verified and confirmed together with the fitting relationship and the spaced relationship, which can effectively improve the accuracy of data transmission.

[0076] Furthermore, the first client is also used to save the feature code sequence. The data center is also used to send the feature code sequence to the second client for the laminated slab manufacturer to determine the matching relationship with the purchaser through the feature code sequence.

[0077] Through this design, the feature code sequence can not only be used as the carrier for transmitting the laminated slab purchase data, but also be used as the basis for order matching between the purchaser and the laminated slab manufacturer. Since the reference point P is randomly generated, the feature code sequence has a high uniqueness. Using the feature code sequence as the basis for order matching between the purchaser and the laminated slab manufacturer can effectively reduce the probability of errors in order management.

[0078] Furthermore, the first client is also used to determine the lifting workload of the laminated slabs according to the specific value of the unit distance and the length of the feature code sequence.

[0079] When the specific value of the unit distance is fixed, the longer the length of the feature code sequence, the more laminated slabs there are and / or the larger the total area is, and the greater the subsequent lifting workload of the laminated slabs will be.

[0080] When the length of the feature code sequence is fixed, the larger the specific value of the unit distance is, the more laminated slabs there are and / or the larger the total area is, and the greater the subsequent lifting workload of the laminated slabs will be.

[0081] The first client stores a reference threshold. When the hoisting workload of the laminated slab is greater than the reference threshold, a prompt is sent to the purchaser.

[0082] For some special construction environments or situations, the resources for building material hoisting may be relatively scarce. This facilitates giving an auxiliary prompt to the purchaser to avoid the problem that the design plan does not match the actual construction capacity.

[0083] Further, in D2, when the data center determines each position point, if the distance between two adjacent position points is greater than the unit distance, it means that there may be other position points missing between these two adjacent position points. This may be caused by the omission of the length value and angle value of some connecting lines L when the first client generates the feature code sequence, or may be caused by the omission when the data center extracts the length value and angle value from the feature code sequence, or may be caused by data transmission errors when the first client sends the feature code sequence to the data center. All of these will affect the accuracy of the BIM three-dimensional model of the laminated slab, the concrete demand data, and the steel bar demand data.

[0084] If the above situation occurs, the data center will send a data error prompt to the management personnel to facilitate problem troubleshooting.

[0085] In summary, the prefabricated laminated slab engineering solution generation system based on Web and BIM provided by the embodiments of the present invention can effectively improve the effectiveness and accuracy of information transmission between the purchaser and the laminated slab manufacturer, and can help the laminated slab manufacturer shorten the production preparation time, effectively improving the timeliness of product delivery. By using the feature code sequence as the information carrier, the system simultaneously performs functions such as data lightweighting, accurate transmission of procurement information, local self-check of the purchaser's drawings, evaluation of the hoisting workload of the laminated slab, and accurate management of the orders of the laminated slab manufacturer.

[0086] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A Web-based and BIM-based prefabricated composite slab engineering scheme generation system, characterized in that: include: A first client, a data center, and a second client; The first client and the second client are both connected to the data center via web network communication; The first client is used to upload a superimposed plate layout diagram to obtain superimposed plate layout data and send the superimposed plate layout data to the data center; The data center is used to construct a superimposed slab BIM three-dimensional model according to the superimposed slab layout data, and determine the superimposed slab concrete demand data and steel demand data according to the superimposed slab BIM three-dimensional model; the data center is also used to send the superimposed slab BIM three-dimensional model, the concrete demand data and the steel demand data to the second client; Wherein, the first client is used by the purchaser, and the second client is used by the composite board manufacturer; The stacked plate arrangement data includes: a feature code sequence; When the first client obtains the feature code sequence, the first client performs an identification process; the identification process includes the following steps: S1, placing the stacked plate layout drawing into a reference plane, and randomly generating a reference point in the reference plane; S2, determining each rectangular area corresponding to the laminated plate in the laminated plate layout diagram, and selecting one of the rectangular areas as an identification object; S3, setting a moving point on the boundary of the identified object, and constructing a line between the moving point and the reference point; when the moving point moves unidirectionally along the boundary of the identified object, the length value and the angle value of the line are recorded every time the moving point moves a unit distance, and when the moving point reaches each corner of the identified object; until the moving point completes a circle along the boundary of the identified object; S4, taking another rectangular area closest to the recognition object as the new recognition object, and repeatedly executing S3 until all the rectangular areas are traversed; S5. Create the feature code sequence, which includes a plurality of feature code units arranged in sequence; save the length value and the angle value belonging to the same connecting line in the same feature code unit, and save them in sequence in each feature code unit according to the generation order of the length value and the angle value.

2. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1 is characterized in that: When the data center constructs the BIM three-dimensional model of the superimposed slab according to the superimposed slab layout data, the following steps are included: D1. construct a sketch plane, randomly generate a reference point in the sketch plane, and use the reference point as a point corresponding to the reference point; D2. In the feature code sequence, the length value and the angle value are sequentially extracted according to the order in which the feature code units are arranged, and each position point corresponding to the moving position of the moving point is determined in the sketch plane according to the reference point, the length value and the angle value, and a sketch of the superimposed plate corresponding to each of the rectangular areas is constructed according to the position points; D3. Construct the BIM three-dimensional model of the composite slab according to the composite slab sketch.

3. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1 is characterized in that: The reference point is located outside the range of the laminated plate layout diagram.

4. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1, characterized in that: When the moving point is set on the boundary of the recognition object, the starting position of the moving point is a corner of the boundary of the recognition object.

5. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1 is characterized in that: The first client is further used to determine whether there is a situation where the boundary parts of the rectangular areas overlap according to the feature code sequence; if so, the corresponding two rectangular areas are marked as being in a fitting relationship, otherwise they are marked as being in a spacing relationship; The first client is also used to verify the fitting relationship and the spacing relationship between the rectangular areas with the purchaser, and if the verification is correct, the composite board layout data is sent to the data center.

6. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1, characterized in that: The first client is also used to verify each of the identified rectangular areas with the purchaser, and if the verification is correct, the composite board layout data is sent to the data center.

7. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1 is characterized in that: The first client is further used to store the feature code sequence; the data center is further used to send the feature code sequence to the second client, so that the composite board manufacturer can determine the matching relationship with the purchaser through the feature code sequence.

8. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 1 is characterized in that: The first client is also used to determine the workload of hoisting the composite board according to the specific value of the unit distance and the length of the characteristic code sequence; The first client stores a reference threshold value, and when the workload of hoisting the composite plate is greater than the reference threshold value, a prompt is sent to the purchaser.

9. The Web-based and BIM-based prefabricated composite slab engineering scheme generation system according to claim 2, characterized in that: In D2, when the data center determines each of the location points, if the distance between two adjacent location points is greater than the unit distance, a data error prompt is issued.

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