CN116090072B - Engineering construction model export system based on BIM technology - Google Patents
Engineering construction model export system based on BIM technology Download PDFInfo
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Abstract
The invention relates to the technical field of model export of BIM technology, in particular to an engineering construction model export system based on BIM technology, which comprises a model layer dividing unit for determining an elevation level and equally dividing a Revit model into a plurality of model layers at a second elevation level, a region dividing unit for determining a node level and determining a mode of dividing a region of the model layers at the second node level so as to determine a data export unit, a calculating module for calculating an export difficulty parameter and determining an export difficulty parameter level, an adjusting unit for determining a mode of reducing the data export rate at the first export difficulty parameter level and a mode of improving the data export rate at the third export difficulty parameter level, and a correcting unit for determining a complex node duty level and determining a correction mode of the adjusted export rate at the second complex node duty level.
Description
Technical Field
The invention relates to the technical field of model derivation of BIM technology, in particular to an engineering construction model derivation system based on BIM technology.
Background
BIM technology is increasingly used in engineering construction, and the name of BIM is building information model (Bu i ld ing I nformat ion Mo ld ing). Based on the physical information of the building project, it uses 3D digital technology and creates a digital model for simulating the actual conditions of the building. In the Chinese Standard GB/T51212-2016 building information model application unified Standard, BIM is defined as a digital representation of physical and functional features in the life and workplace of a building, and a full scale of design, construction and functional project results.
Chinese patent publication No.: CN108170989B discloses a method for deriving engineering construction model based on BIM technology, and the invention provides a method for deriving engineering construction model based on BIM technology, comprising the following steps: s1, selecting an engineering construction model export format and a version corresponding to the engineering construction model export format; s2, according to the selected engineering construction model, the classification mode is Product assembly, part parts and Body; s3, organizing a new required model organization structure according to the acquired engineering construction model data organization structure and the required new model data organization structure; s4, respectively filling the corresponding model attribute data and the model graphic entity B-Rep data obtained after the classification of the model data organization structure into the corresponding engineering construction model data organization structure; and S5, according to the export format of the selected engineering construction model and the version corresponding to the export format, exporting the obtained engineering construction model data organization structure, engineering construction model attribute data and graphic B-Rep data on each classification structure.
However, when the BIM technology is applied to derive the engineering construction model, data loss often occurs, the derived model is incomplete, the construction progress is seriously influenced, and the solution of the prior art is to reduce the derivation rate of the model, so that the problem of lower model derivation efficiency is also brought. The number of nodes in an engineering construction model, particularly the number of complex nodes, has great influence on the integrity of a derived model, and the problem of how to improve the model derivation efficiency while guaranteeing the integrity of the derived model is urgent to be solved.
Disclosure of Invention
Therefore, the invention provides an engineering construction model export system based on BIM technology, which is used for solving the problems of incomplete engineering construction model exported in the prior art and lower model export efficiency.
In order to achieve the above object, the present invention provides an engineering construction model derivation system based on a BIM technology, including:
a data export unit determining module for determining a data export unit when the construction model is exported, comprising a model layer dividing unit and a region dividing unit which are connected with each other,
the model layer dividing unit is used for obtaining the elevation of the Revit model to determine the elevation level, and equally dividing the Revit model into a plurality of model layers at the second elevation level;
the region dividing unit is used for calculating the number of nodes in the unit projection area of any model layer to determine the node level, determining the mode of dividing the region of the model layer at the second node level, and taking the divided region as a data export unit when the construction model is exported;
the calculation module is connected with the data export unit determination module and is used for acquiring the projection area of the data export unit and the number of nodes to calculate export difficulty parameters and determine the export difficulty parameter level;
a deriving rate adjusting module connected with the calculating module for determining the data deriving rate of the data deriving unit, comprising an adjusting unit and a correcting unit connected with each other,
the adjusting unit is used for determining a mode for reducing the data export rate under the first export difficulty parameter level and determining a mode for improving the data export rate under the third export difficulty parameter level;
the correction unit is used for counting the number of complex nodes in any data export unit to determine the duty ratio level of the complex nodes, and determining a correction mode of the regulated export rate at the second complex node duty ratio level.
Further, the model layer dividing unit acquires the elevation H of the Revit model, compares the elevation H with a preset elevation H0 to determine whether to layer the Revit model, wherein,
if the model layer dividing unit is at the first elevation level, the model layer dividing unit judges that layering of the Revit model is not needed;
if the model layer dividing unit is at the second elevation level, the model layer dividing unit judges that the Revit model needs to be layered, calculates the ratio N of the elevation H to the preset elevation H0, and sets n=H/H0, and the model layer dividing unit equally divides the Revit model into N model layers, wherein when N is a positive integer, N=n, and when N is not a positive integer, N=n+1;
the first elevation level satisfies H.ltoreq.H20, and the second elevation level satisfies H > H20.
Further, the area dividing unit obtains the projection area S of any model layer and the number M of nodes in the corresponding model layer, calculates the number M of nodes in the unit projection area according to the projection area S of the model layer and the number M of nodes in the corresponding model layer, sets m=M/S, is provided with the standard number M0 of the nodes in the unit projection area, compares the number M of the nodes in the unit projection area with the number M0 to judge whether to divide the model layer into areas,
if the first node is horizontal, the area dividing unit judges that the model layer does not need to be divided into areas;
if the model layer is the second node level, the area dividing unit judges that the model layer needs to be divided into areas;
the first node level satisfies m.ltoreq.m0, and the second node level satisfies m > m0.
Further, the area dividing unit calculates node difference value delta m between the number m of nodes in the unit projection area and the standard number m0 of nodes in the unit projection area at the second node level, and sets delta m=m-m 0, wherein the area dividing unit is provided with a first preset node difference value delta m1 and a second preset node difference value delta m2, delta m1 is smaller than delta m2, and the area dividing unit compares the node difference value delta m with delta m1 and delta m2 respectively to determine the mode of area dividing the model layer,
the first area division mode is that a first area division adjusting coefficient e1 is selected to determine the area division number of the model layer as C1, and C1=C0×e1 is set;
the second area division mode is that a second area division adjusting coefficient e2 is selected to determine the area division number of the model layer as C2, and C2=C0×e2 is set;
the third area division mode is that a third area division adjusting coefficient e3 is selected to determine the area division number of the model layer as C3, and C3=C0×e3 is set;
the region dividing unit takes the divided region as a data export unit when the construction model is exported;
the first area dividing mode meets Δm more than or equal to Δm2, the second area dividing mode meets Δm1 less than or equal to Δm2, the third area dividing mode meets Δm less than Δm1,1.1 less than e3 less than e2 less than e1 less than 1.3, and C0 is the preset area dividing number.
Further, the calculation module counts the projection area Sq of any one of the data export units and the number mq of nodes in the corresponding data export unit, calculates the export difficulty parameter F according to the projection area Sq of the data export unit and the number mq of nodes in the corresponding data export unit, and sets
Wherein Sq0 is the projected area of the preset data export unit, and mq0 is the number of nodes in the preset data export unit.
Further, a first derivation difficulty comparison parameter F1 and a second derivation difficulty comparison parameter F2 are arranged in the calculation module, F1 is smaller than F2, the calculation module respectively compares the derivation difficulty parameter F with F1 and F2 to determine whether to adjust the data derivation rate of the data derivation unit,
if the first export difficulty parameter level is the first export difficulty parameter level, the calculation module judges that the export difficulty parameter is too large, and the data export rate of the data export unit is required to be reduced;
if the second export difficulty parameter level is the second export difficulty parameter level, the calculation module judges that the export difficulty parameter meets the standard, and the data export rate of the data export unit is not required to be adjusted;
if the third derived difficulty parameter level is the third derived difficulty parameter level, the calculation module judges that the derived difficulty parameter is too small, and the data deriving rate of the data deriving unit is required to be improved for adjustment;
the first derived difficulty parameter level satisfies F more than or equal to F2, the second derived difficulty parameter level satisfies F1 more than or equal to F < F2, and the third derived difficulty parameter level satisfies F < F1.
Further, the regulating unit calculates an overhigh parameter difference delta Fg of the derived difficulty parameter F and the second derived difficulty parameter F2 at the first derived difficulty parameter level, setting delta Fg=F-F2, wherein the regulating unit is provided with a first preset overhigh parameter difference delta Fg1 and a second preset overhigh parameter difference delta Fg2, delta Fg1 is less than delta Fg2, the regulating unit respectively compares delta Fg with delta Fg1 and delta Fg2 to determine a mode of reducing the data deriving rate of the data deriving unit,
the first lead-out rate reducing mode is to adjust the lead-out rate to a first lead-out rate after reduction Vg1, and set Vg1=Vg0-V0×ΔFg/ΔFg2;
the second lead-out rate reducing mode is to adjust the lead-out rate to a second lead-out rate after reduction Vg2, and set v2=v0×2Δfg/(Δfg2+Δfg1);
the third reduced derived rate mode is to adjust the derived rate to a third reduced derived rate Vg3, and set v3=v0×Δfg/Δfg1;
the first lead-out rate reducing mode meets delta Fg more than or equal to delta Fg2, the second lead-out rate reducing mode meets delta Fg1 more than or equal to delta Fg less than delta Fg2, the third lead-out rate reducing mode meets delta Fg less than delta Fg1, V0 is a preset lead-out rate reducing adjustment quantity, and Vg0 is an initial lead-out rate.
Further, the regulating unit calculates an excessively low parameter difference value delta Fd of the derived difficulty parameter F and the first derived difficulty parameter F1 at the third derived difficulty parameter level, and sets delta fd=f1-F, the regulating unit is provided with a first preset excessively low parameter difference value delta Fd1 and a second preset excessively low parameter difference value delta Fd2, delta Fd1 < delta Fd2, and the regulating unit compares delta Fd with delta Fd1 and delta Fd2 respectively to determine a mode of improving the data deriving rate of the data deriving unit,
the first increased derived rate mode is to adjust the derived rate to the first increased derived rate Vd1, and set vd1=v0+c0×Δfd/Δfd2;
the second increased derived rate mode is to adjust the derived rate to the second increased derived rate Vd2, and set vd2=v0+c0×2Δfd/(Δfd2+Δfd1);
the third enhanced derived rate mode is to adjust the derived rate to a third enhanced derived rate Vd3, and set vd3=v0+c0×Δfd/Δfd1;
the first lead-out rate increasing mode meets delta Fd not less than delta Fd2, the second lead-out rate increasing mode meets delta Fd not less than delta Fd2, the third lead-out rate increasing mode meets delta Fd less than delta Fd1, C0 is a preset lead-out rate increasing adjustment quantity, and Vg0 is an initial lead-out rate.
Further, the correction unit counts the number K of complex nodes in any data export unit, calculates the number proportion B of complex nodes in the data export unit, sets B=K/mq, compares the number proportion B of complex nodes with the preset number proportion B0 of complex nodes to determine whether to correct the export rate of the data export unit after adjustment, wherein,
if the first complex node is the first complex node duty ratio level, the correction unit judges that the adjusted derived rate is not required to be corrected;
if the second complex node is the second complex node duty ratio level, the correction unit judges that the adjusted derived rate needs to be corrected;
the first complex node duty ratio level satisfies B.ltoreq.B0, the second complex node duty ratio level satisfies B > B0, mq is the number of nodes in the corresponding data export unit, and the nodes comprise complex nodes.
Further, the correction unit calculates a duty ratio difference value Δb between the duty ratio B of the number of complex nodes and the duty ratio B0 of the number of preset complex nodes at the duty ratio level of the second complex nodes, and sets Δb=b-B0, the correction unit is provided with a first preset duty ratio difference value Δb1 and a second preset duty ratio difference value Δb2, and the correction unit compares the duty ratio difference value Δb with Δb1 and Δb2 respectively to determine a correction mode for the adjusted derived rate, wherein,
the first derived rate correction mode is to select a first derived rate correction coefficient g1 to correct the regulated derived rate to Vx1, and set vx1=vxxg1;
the second derived rate correction mode is to select a second derived rate correction coefficient g2 to correct the regulated derived rate to Vx2, and set vx2=vxxg2;
the third derived rate correction mode is that a third derived rate correction coefficient g3 is selected to correct the regulated derived rate to Vx3, and Vx3=Vxxg3 is set;
the first export rate correction mode meets delta B more than or equal to delta B2, the second export rate correction mode meets delta B1 less than or equal to delta B < delta B2, the third export rate correction mode meets delta B < delta B1,0.8 < g1 < g2 < g3 < 1, and Vx is the regulated export rate.
Compared with the prior art, the method has the beneficial effects that the complex part in the engineering construction model contains more nodes, the complex nodes are more, and the nodes, especially the complex nodes, contain larger information quantity, so that the integrity of the derived model and the efficiency of the derived model are influenced. The invention divides the Revit model into a plurality of model layers and further divides the model layers according to the node level so as to reduce the data transmission unit when the model is exported, thereby ensuring the integrity of the exported model.
Furthermore, the model layer dividing unit of the invention carries out layering on the Revit model according to the elevation H of the Revit model, the area dividing unit obtains the projection area S of any model layer and the number M of nodes in the corresponding model layer so as to calculate the number M of the nodes in the unit projection area, and the model layer is divided into a plurality of data export units according to the M selected corresponding area dividing adjustment coefficients so as to reduce the data transmission units during model export, thereby ensuring the integrity of the exported model.
Further, the invention introduces the deriving difficulty parameter F, which is a characteristic parameter of the data deriving unit when the model is derived, and is related to the projection area Sq of the data deriving unit and the number mq of nodes in the corresponding data deriving unit, when F is larger, the data deriving difficulty of the data deriving unit is indicated to be larger, at the moment, the data deriving rate of the data deriving unit is reduced, so as to avoid data loss in the model deriving process, ensure the integrity of the derived model, and when F is smaller, the data deriving difficulty of the data deriving unit is indicated to be smaller, at the moment, the data deriving rate of the data deriving unit is increased, so as to improve the efficiency of the derived model.
Furthermore, when the number of complex nodes exceeds the preset standard, the correction unit corrects the regulated export rate, so that data loss caused by unmatched export rate and data export difficulty is avoided, and the integrity of the export model is further ensured.
Drawings
FIG. 1 is a block diagram of a construction model derivation system based on BIM technology in accordance with an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a block diagram of an engineering construction model export system based on a BIM technology according to an embodiment of the present invention, the engineering construction model export system based on the BIM technology includes:
a data export unit determining module for determining a data export unit when the construction model is exported, comprising a model layer dividing unit and a region dividing unit which are connected with each other,
the model layer dividing unit is used for obtaining the elevation of the Revit model to determine the elevation level, and equally dividing the Revit model into a plurality of model layers at the second elevation level;
the region dividing unit is used for calculating the number of nodes in the unit projection area of any model layer to determine the node level, determining the mode of dividing the region of the model layer at the second node level, and taking the divided region as a data export unit when the construction model is exported;
the calculation module is connected with the data export unit determination module and is used for acquiring the projection area of the data export unit and the number of nodes to calculate export difficulty parameters and determine the export difficulty parameter level;
a deriving rate adjusting module connected with the calculating module for determining the data deriving rate of the data deriving unit, comprising an adjusting unit and a correcting unit connected with each other,
the adjusting unit is used for determining a mode for reducing the data export rate under the first export difficulty parameter level and determining a mode for improving the data export rate under the third export difficulty parameter level;
the correction unit is used for counting the number of complex nodes in any data export unit to determine the duty ratio level of the complex nodes, and determining a correction mode of the regulated export rate at the second complex node duty ratio level.
The complex part in the engineering construction model contains more nodes, the complex nodes are more, and the nodes, especially the complex nodes, contain larger information quantity, so that the integrity of the derived model and the efficiency of the derived model are influenced. The invention divides the Revit model into a plurality of model layers and further divides the model layers according to the node level so as to reduce the data transmission unit when the model is exported, thereby ensuring the integrity of the exported model.
In this embodiment, the complex node is determined by displaying only the complex region in the integrated plan view by using the clipping region function, so as to obtain a plan view of one node, and taking the node of the complex region as the complex node.
Specifically, the model layer dividing unit acquires the elevation H of the Revit model, compares the elevation H with a preset elevation H0 to determine whether to layer the Revit model, wherein,
if the model layer dividing unit is at the first elevation level, the model layer dividing unit judges that layering of the Revit model is not needed;
if the model layer dividing unit is at the second elevation level, the model layer dividing unit judges that the Revit model needs to be layered, calculates the ratio N of the elevation H to the preset elevation H0, and sets n=H/H0, and the model layer dividing unit equally divides the Revit model into N model layers, wherein when N is a positive integer, N=n, and when N is not a positive integer, N=n+1;
the first elevation level satisfies H.ltoreq.H20, and the second elevation level satisfies H > H20.
In this embodiment, the elevation of the Revit model refers to the overall height of the engineering construction model, and when the elevation of the Revit model exceeds a preset elevation, the Revit model is layered, and in this embodiment, specific numerical values can be set according to actual needs.
Specifically, the area dividing unit obtains the projection area S of any model layer and the number M of nodes in the corresponding model layer, calculates the number M of nodes in the unit projection area according to the projection area S of the model layer and the number M of nodes in the corresponding model layer, sets m=M/S, sets the standard number M0 of the nodes in the unit projection area in the area dividing unit, compares the number M of the nodes in the unit projection area with the number M0 to judge whether to divide the model layer into areas,
if the first node is horizontal, the area dividing unit judges that the model layer does not need to be divided into areas;
if the model layer is the second node level, the area dividing unit judges that the model layer needs to be divided into areas;
the first node level satisfies m.ltoreq.m0, and the second node level satisfies m > m0.
Specifically, the area dividing unit calculates node difference value delta m between the number m of nodes in the unit projection area and the standard number m0 of nodes in the unit projection area at the second node level, and sets delta m=m-m 0, wherein the area dividing unit is provided with a first preset node difference value delta m1 and a second preset node difference value delta m2, delta m1 is smaller than delta m2, and the area dividing unit compares the node difference value delta m with delta m1 and delta m2 respectively to determine the mode of area dividing the model layer,
the first area division mode is that a first area division adjusting coefficient e1 is selected to determine the area division number of the model layer as C1, and C1=C0×e1 is set;
the second area division mode is that a second area division adjusting coefficient e2 is selected to determine the area division number of the model layer as C2, and C2=C0×e2 is set;
the third area division mode is that a third area division adjusting coefficient e3 is selected to determine the area division number of the model layer as C3, and C3=C0×e3 is set;
the region dividing unit takes the divided region as a data export unit when the construction model is exported;
the first area dividing mode meets Δm more than or equal to Δm2, the second area dividing mode meets Δm1 less than or equal to Δm2, the third area dividing mode meets Δm less than Δm1,1.1 less than e3 less than e2 less than e1 less than 1.3, and C0 is the preset area dividing number.
The model layer dividing unit is used for layering the Revit model according to the elevation H of the Revit model, the area dividing unit is used for obtaining the projection area S of any model layer and the number M of nodes in the corresponding model layer so as to calculate the number M of the nodes in the unit projection area, and the corresponding area dividing adjustment coefficient is selected according to the M to divide the model layer into a plurality of data export units so as to reduce the data transmission units during model export, thereby ensuring the integrity of the exported model.
Specifically, the calculation module counts the projection area Sq of any one of the data derivation units and the number mq of nodes in the corresponding data derivation unit, calculates the derivation difficulty parameter F according to the projection area Sq of the data derivation unit and the number mq of nodes in the corresponding data derivation unit, and sets
Wherein Sq0 is the projected area of the preset data export unit, and mq0 is the number of nodes in the preset data export unit.
Specifically, a first derivation difficulty comparison parameter F1 and a second derivation difficulty comparison parameter F2 are arranged in the calculation module, F1 is smaller than F2, the calculation module respectively compares the derivation difficulty parameter F with F1 and F2 to determine whether to adjust the data derivation rate of the data derivation unit,
if the first export difficulty parameter level is the first export difficulty parameter level, the calculation module judges that the export difficulty parameter is too large, and the data export rate of the data export unit is required to be reduced;
if the second export difficulty parameter level is the second export difficulty parameter level, the calculation module judges that the export difficulty parameter meets the standard, and the data export rate of the data export unit is not required to be adjusted;
if the third derived difficulty parameter level is the third derived difficulty parameter level, the calculation module judges that the derived difficulty parameter is too small, and the data deriving rate of the data deriving unit is required to be improved for adjustment;
the first derived difficulty parameter level satisfies F more than or equal to F2, the second derived difficulty parameter level satisfies F1 more than or equal to F < F2, and the third derived difficulty parameter level satisfies F < F1.
In particular, the regulating unit calculates an excessively high parameter difference value delta Fg of the derived difficulty parameter F and the second derived difficulty parameter F2 at the first derived difficulty parameter level, deltaFg=F-F2 is set, a first preset excessively high parameter difference value delta Fg1 and a second preset excessively high parameter difference value delta Fg2 are arranged in the regulating unit, delta Fg1 is smaller than delta Fg2, the regulating unit respectively compares delta Fg with delta Fg1 and delta Fg2 to determine a mode of reducing the data derived rate of the data derived unit,
the first lead-out rate reducing mode is to adjust the lead-out rate to a first lead-out rate after reduction Vg1, and set Vg1=Vg0-V0×ΔFg/ΔFg2;
the second lead-out rate reducing mode is to adjust the lead-out rate to a second lead-out rate after reduction Vg2, and set v2=v0×2Δfg/(Δfg2+Δfg1);
the third reduced derived rate mode is to adjust the derived rate to a third reduced derived rate Vg3, and set v3=v0×Δfg/Δfg1;
the first lead-out rate reducing mode meets delta Fg more than or equal to delta Fg2, the second lead-out rate reducing mode meets delta Fg1 more than or equal to delta Fg less than delta Fg2, the third lead-out rate reducing mode meets delta Fg less than delta Fg1, V0 is a preset lead-out rate reducing adjustment quantity, and Vg0 is an initial lead-out rate.
In particular, the regulating unit calculates an excessively low parameter difference value Δfd of the derived difficulty parameter F and the first derived difficulty parameter F1 at the third derived difficulty parameter level, Δfd=f1-F is set, a first preset excessively low parameter difference value Δfd1 and a second preset excessively low parameter difference value Δfd2 are provided in the regulating unit, Δfd1 < Δfd2, the regulating unit compares Δfd with Δfd1 and Δfd2 respectively to determine a way of increasing the data derivation rate of the data derivation unit,
the first increased derived rate mode is to adjust the derived rate to the first increased derived rate Vd1, and set vd1=v0+c0×Δfd/Δfd2;
the second increased derived rate mode is to adjust the derived rate to the second increased derived rate Vd2, and set vd2=v0+c0×2Δfd/(Δfd2+Δfd1);
the third enhanced derived rate mode is to adjust the derived rate to a third enhanced derived rate Vd3, and set vd3=v0+c0×Δfd/Δfd1;
the first lead-out rate increasing mode meets delta Fd not less than delta Fd2, the second lead-out rate increasing mode meets delta Fd not less than delta Fd2, the third lead-out rate increasing mode meets delta Fd less than delta Fd1, C0 is a preset lead-out rate increasing adjustment quantity, and Vg0 is an initial lead-out rate.
The invention introduces the derivation difficulty parameter F, which is a characteristic parameter of a data derivation unit when the model is derived, and is related to the projection area Sq of the data derivation unit and the number mq of nodes in the corresponding data derivation unit, when F is larger, the data derivation difficulty of the data derivation unit is indicated to be larger, at the moment, the data derivation rate of the data derivation unit is reduced, so that the data loss in the model derivation process is avoided, the integrity of the derived model is ensured, when F is smaller, the data derivation difficulty of the data derivation unit is indicated to be smaller, at the moment, the data derivation rate of the data derivation unit is increased, and the efficiency of the derived model is improved.
Specifically, the correction unit counts the number K of complex nodes in any one of the data export units, calculates the number proportion B of complex nodes in the data export unit, sets b=k/mq, compares the number proportion B of complex nodes with the preset number proportion B0 of complex nodes to determine whether to correct the export rate of the data export unit after adjustment, wherein,
if the first complex node is the first complex node duty ratio level, the correction unit judges that the adjusted derived rate is not required to be corrected;
if the second complex node is the second complex node duty ratio level, the correction unit judges that the adjusted derived rate needs to be corrected;
the first complex node duty ratio level satisfies B.ltoreq.B0, the second complex node duty ratio level satisfies B > B0, mq is the number of nodes in the corresponding data export unit, and the nodes comprise complex nodes.
Specifically, the correction unit calculates a duty ratio difference Δb between a duty ratio B of the number of complex nodes and a duty ratio B0 of the number of preset complex nodes at the second duty ratio level of complex nodes, and sets Δb=b-B0, the correction unit is provided with a first preset duty ratio difference Δb1 and a second preset duty ratio difference Δb2, and the correction unit compares the duty ratio difference Δb with Δb1 and Δb2 respectively to determine a correction manner for the adjusted derived rate, wherein,
the first derived rate correction mode is to select a first derived rate correction coefficient g1 to correct the regulated derived rate to Vx1, and set vx1=vxxg1;
the second derived rate correction mode is to select a second derived rate correction coefficient g2 to correct the regulated derived rate to Vx2, and set vx2=vxxg2;
the third derived rate correction mode is that a third derived rate correction coefficient g3 is selected to correct the regulated derived rate to Vx3, and Vx3=Vxxg3 is set;
the first export rate correction mode meets delta B more than or equal to delta B2, the second export rate correction mode meets delta B1 less than or equal to delta B < delta B2, the third export rate correction mode meets delta B < delta B1,0.8 < g1 < g2 < g3 < 1, and Vx is the regulated export rate.
The adjusted derived rate includes a reduced derived rate and an increased derived rate.
The correction unit corrects the regulated export rate when the complex node quantity ratio exceeds a preset standard, and avoids data loss caused by unmatched export rate and data export difficulty, thereby further ensuring the integrity of an export model.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An engineering construction model export system based on BIM technique, which is characterized by comprising:
a data export unit determining module for determining a data export unit when the construction model is exported, comprising a model layer dividing unit and a region dividing unit which are connected with each other,
the model layer dividing unit is used for obtaining the elevation H of the Revit model to determine a first elevation level and a second elevation level, and equally dividing the Revit model into a plurality of model layers at the second elevation level, wherein the first elevation level meets H & ltoreq H0, the second elevation level meets H & gtH 0, and H0 is a preset elevation;
the area dividing unit is used for calculating the number m of nodes in the unit projection area of any model layer to determine a first node level and a second node level, determining a mode of dividing the area of the model layer at the second node level, and taking the divided area as a data export unit when a construction model is exported, wherein the first node level meets m < m0, the second node level meets m < m0, and m0 is the unit projection area node standard number;
the calculation module is connected with the data export unit determination module and used for obtaining the projection area of the data export unit and the number of nodes to calculate an export difficulty parameter F and determine a first export difficulty parameter level, a second export difficulty parameter level and a third export difficulty parameter level, wherein the calculation module is provided with a first export difficulty comparison parameter F1 and a second export difficulty comparison parameter F2, F1 is smaller than F2, the first export difficulty parameter level meets F not smaller than F2, the second export difficulty parameter level meets F1 not smaller than F2, and the third export difficulty parameter level meets F < F1;
a deriving rate adjusting module connected with the calculating module for determining the data deriving rate of the data deriving unit, comprising an adjusting unit and a correcting unit connected with each other,
the adjusting unit is used for determining a mode for reducing the data export rate under the first export difficulty parameter level and determining a mode for improving the data export rate under the third export difficulty parameter level;
the correction unit is used for counting the number K of complex nodes in any data export unit to determine a first complex node duty ratio level and a second complex node duty ratio level, and determining a correction mode of the regulated export rate at the second complex node duty ratio level, wherein the complex node number duty ratio is marked as B, the first complex node duty ratio level meets B less than or equal to B0, the second complex node duty ratio level meets B & gtB 0, and B0 is a preset complex node number duty ratio.
2. The system for deriving a construction model for engineering based on BIM technique according to claim 1, wherein the model layer dividing unit acquires an elevation H of a Revit model, compares the elevation H with a preset elevation H0 to determine whether to layer the Revit model, wherein,
if the model layer dividing unit is at the first elevation level, the model layer dividing unit judges that layering of the Revit model is not needed;
and if the model layer dividing unit is at the second elevation level, the model layer dividing unit judges that the Revit model needs to be layered, calculates the ratio N of the elevation H to the preset elevation H0, sets n=H/H0, and equally divides the Revit model into N model layers, wherein when N is a positive integer, N=n, and when N is not a positive integer, N=n+1.
3. The engineering construction model derivation system based on the BIM technology according to claim 2, wherein the area dividing unit obtains a projection area S of any one of the model layers and a number M of nodes in the corresponding model layer, calculates a number M of nodes in a unit projection area according to the projection area S of the model layer and the number M of nodes in the corresponding model layer, sets m=m/S, sets a standard number M0 of nodes in the unit projection area in the area dividing unit, compares the number M of nodes in the unit projection area with M0 to determine whether to perform area division on the model layer,
if the first node is horizontal, the area dividing unit judges that the model layer does not need to be divided into areas;
and if the model layer is at the second node level, the region dividing unit judges that the model layer needs to be divided into regions.
4. The Building Information Modeling (BIM) technology-based engineering construction model derivation system according to claim 3, wherein the region dividing unit calculates a node difference value Δm between the number m of nodes in a unit projected area and the standard number m0 of nodes in the unit projected area at a second node level, and sets Δm=m-m 0, wherein a first preset node difference value Δm1 and a second preset node difference value Δm2 are provided in the region dividing unit, Δm1 < Δm2, and the region dividing unit compares the node difference value Δm with Δm1 and Δm2, respectively, to determine a manner of region dividing the model layer,
the first area division mode is that a first area division adjusting coefficient e1 is selected to determine the area division number of the model layer as C1, and C1=C0×e1 is set;
the second area division mode is that a second area division adjusting coefficient e2 is selected to determine the area division number of the model layer as C2, and C2=C0×e2 is set;
the third area division mode is that a third area division adjusting coefficient e3 is selected to determine the area division number of the model layer as C3, and C3=C0×e3 is set;
the region dividing unit takes the divided region as a data export unit when the construction model is exported;
the first area dividing mode meets Δm more than or equal to Δm2, the second area dividing mode meets Δm1 less than or equal to Δm2, the third area dividing mode meets Δm less than Δm1,1.1 less than e3 less than e2 less than e1 less than 1.3, and C0 is the preset area dividing number.
5. The BIM technology-based engineering construction model derivation system according to claim 4, wherein the calculation module counts the projection area Sq of any one of the data derivation units and the number mq of nodes in the corresponding data derivation unit, calculates the derivation difficulty parameter F according to the projection area Sq of the data derivation unit and the number mq of nodes in the corresponding data derivation unit, and sets
Wherein Sq0 is the projected area of the preset data export unit, and mq0 is the number of nodes in the preset data export unit.
6. The BIM technique-based engineering construction model derivation system of claim 4, wherein the calculation module compares the derivation difficulty parameter F with F1 and F2, respectively, to determine whether to adjust the data derivation rate of the data derivation unit, wherein,
if the first export difficulty parameter level is the first export difficulty parameter level, the calculation module judges that the export difficulty parameter is too large, and the data export rate of the data export unit is required to be reduced;
if the second export difficulty parameter level is the second export difficulty parameter level, the calculation module judges that the export difficulty parameter meets the standard, and the data export rate of the data export unit is not required to be adjusted;
and if the third derived difficulty parameter level is the third derived difficulty parameter level, the calculation module judges that the derived difficulty parameter is too small, and the data deriving rate of the data deriving unit is required to be improved for adjustment.
7. The Building Information Modeling (BIM) technology-based engineering construction model derivation system according to claim 6, wherein the adjustment unit calculates an excessively high parameter difference value ΔFg between the derivation difficulty parameter F and the second derivation difficulty comparison parameter F2 at the first derivation difficulty parameter level, and sets ΔFg=F-F2, a first preset excessively high parameter difference value ΔFg1 and a second preset excessively high parameter difference value ΔFg2 are provided in the adjustment unit, ΔFg1 < ΔFg2, and the adjustment unit compares ΔFg with ΔFg1 and ΔFg2 respectively to determine a manner of reducing the data derivation rate of the data derivation unit,
the first lead-out rate reducing mode is to adjust the lead-out rate to a first lead-out rate after reduction Vg1, and set Vg1=Vg0-V0×ΔFg/ΔFg2;
the second lead-out rate reducing mode is to adjust the lead-out rate to a second lead-out rate after reduction Vg2, and set v2=v0×2Δfg/(Δfg2+Δfg1);
the third reduced derived rate mode is to adjust the derived rate to a third reduced derived rate Vg3, and set v3=v0×Δfg/Δfg1;
the first lead-out rate reducing mode meets delta Fg more than or equal to delta Fg2, the second lead-out rate reducing mode meets delta Fg1 more than or equal to delta Fg less than delta Fg2, the third lead-out rate reducing mode meets delta Fg less than delta Fg1, V0 is a preset lead-out rate reducing adjustment quantity, and Vg0 is an initial lead-out rate.
8. The Building Information Modeling (BIM) technology-based engineering construction model derivation system according to claim 7, wherein the adjustment unit calculates an excessively low parameter difference value ΔFd between the derivation difficulty parameter F and the first derivation difficulty comparison parameter F1 at the third derivation difficulty parameter level, ΔFd=F1-F is set, a first preset excessively low parameter difference value ΔFd1 and a second preset excessively low parameter difference value ΔFd2 are set in the adjustment unit, ΔFd1 < ΔFd2, and the adjustment unit compares ΔFd with ΔFd1 and ΔFd2 respectively to determine a manner of increasing the data derivation rate of the data derivation unit,
the first increased derived rate mode is to adjust the derived rate to the first increased derived rate Vd1, and set vd1=v0+c0×Δfd/Δfd2;
the second increased derived rate mode is to adjust the derived rate to the second increased derived rate Vd2, and set vd2=v0+c0×2Δfd/(Δfd2+Δfd1);
the third enhanced derived rate mode is to adjust the derived rate to a third enhanced derived rate Vd3, and set vd3=v0+c0×Δfd/Δfd1;
the first lead-out rate increasing mode meets delta Fd not less than delta Fd2, the second lead-out rate increasing mode meets delta Fd not less than delta Fd2, the third lead-out rate increasing mode meets delta Fd less than delta Fd1, C0 is a preset lead-out rate increasing adjustment quantity, and Vg0 is an initial lead-out rate.
9. The system according to claim 8, wherein the correction unit counts a number K of complex nodes in any one of the data derivation units, calculates a complex node number ratio B in the data derivation unit, sets b=k/mq, compares the complex node number ratio B with a preset complex node number ratio B0 to determine whether to correct the adjusted derivation rate of the data derivation unit, wherein,
if the first complex node is the first complex node duty ratio level, the correction unit judges that the adjusted derived rate is not required to be corrected;
if the second complex node is the second complex node duty ratio level, the correction unit judges that the adjusted derived rate needs to be corrected;
the first complex node duty ratio level satisfies B.ltoreq.B0, the second complex node duty ratio level satisfies B > B0, mq is the number of nodes in the corresponding data export unit, and the nodes comprise complex nodes.
10. The Building Information Modeling (BIM) technology-based engineering construction model derivation system according to claim 9, wherein the correction unit calculates a duty ratio difference ΔB between a complex node number duty ratio B and a preset complex node number duty ratio B0 at the second complex node duty ratio level, and sets ΔB=B-B0, the correction unit is provided with a first preset duty ratio difference ΔB1 and a second preset duty ratio difference ΔB2, and the correction unit compares the duty ratio difference ΔB with ΔB1 and ΔB2 respectively to determine a correction manner for the adjusted derivation rate,
the first derived rate correction mode is to select a first derived rate correction coefficient g1 to correct the regulated derived rate to Vx1, and set vx1=vxxg1;
the second derived rate correction mode is to select a second derived rate correction coefficient g2 to correct the regulated derived rate to Vx2, and set vx2=vxxg2;
the third derived rate correction mode is that a third derived rate correction coefficient g3 is selected to correct the regulated derived rate to Vx3, and Vx3=Vxxg3 is set;
the first export rate correction mode meets delta B more than or equal to delta B2, the second export rate correction mode meets delta B1 less than or equal to delta B < delta B2, the third export rate correction mode meets delta B < delta B1,0.8 < g1 < g2 < g3 < 1, and Vx is the regulated export rate.
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