CN111507595A - Engineering project intelligent dynamic safety supervision system based on BIM - Google Patents
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Abstract
The invention provides a BIM-based engineering project intelligent dynamic safety supervision system, which comprises: the model building module is used for building a BIM (building information modeling) model of the engineering project according to the basic information of the engineering project; the project management and control module is used for associating the construction progress of the project with the project BIM model to form a project 4D BIM model; the safety analysis module is used for analyzing dangerous and large projects in the engineering project 4D BIM model and marking corresponding dangerous and large project information in the engineering project 4D BIM model; and the safety supervision module is used for monitoring the field construction process of the dangerous and large engineering, acquiring field safety management information, and performing safety risk assessment and safety risk management according to the field safety management information. The intelligent dynamic safety management and control system is helpful for firstly acquiring basic project information, analyzing dangerous projects in the project information by combining with the support of the database, and meanwhile, performing key safety supervision, analysis and management and control on the dangerous projects, thereby improving the efficiency of engineering project safety supervision.
Description
Technical Field
The invention relates to the technical field of project safety management, in particular to an intelligent dynamic safety supervision system for an engineering project based on BIM.
Background
With the increasing complexity of construction projects and the gradual replacement of non-automation by the intellectualization of engineering management, the traditional engineering project safety personnel management mode suffers from serious impact. At present, the safety supervision of an engineering project is usually carried out on site supervision on a construction site through safety managers, and as the professional knowledge related to the engineering project is more and more extensive, the requirements on the safety supervision personnel of the engineering project are higher and higher. However, due to the fact that the comprehensive quality of safety supervision personnel is uneven, the phenomena of engineering project safety management project position shortage and the like are easily caused, so that in the construction process of the construction project, how to improve the level of engineering project safety management and reduce the probability of safety accidents, effective intelligent dynamic management measures are adopted to carry out engineering project multidimensional safety management, and the measures of strengthening prevention as a main measure and controlling as an auxiliary measure are important problems to be solved urgently in the engineering project safety management work.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a BIM-based engineering project intelligent dynamic safety supervision system.
The purpose of the invention is realized by adopting the following technical scheme:
the intelligent dynamic safety supervision system for engineering projects based on BIM is provided, which comprises:
the model building module is used for building a BIM (building information modeling) model of the engineering project according to the basic information of the engineering project;
the project management and control module is used for associating the construction progress of the project with the project BIM model to form a project 4D BIM model;
the safety analysis module is used for analyzing dangerous and large projects in the engineering project 4D BIM model and marking corresponding dangerous and large project information in the engineering project 4D BIM model;
and the safety supervision module is used for monitoring the field construction process of the dangerous and large engineering, acquiring field safety management information, and performing safety risk assessment and safety risk management according to the field safety management information.
In one embodiment, the model building module comprises a database building unit and a BIM model building unit; wherein:
the system comprises a database construction unit, a database management unit and a database management unit, wherein the database construction unit is used for constructing an engineering project database, and the engineering project database stores data required for constructing a BIM (building information modeling) model of an engineering project;
the BIM model building unit is used for building an engineering project BIM model according to basic information of an engineering project, wherein the basic information of the engineering project comprises engineering project drawing information, parameter information, construction process information, project classification information, construction department information, construction standard information, project management standard information and construction section information; the BIM model of the engineering project comprises a visual three-dimensional model and an engineering project construction progress plan which are established according to a design drawing.
In one embodiment, the engineering project database further comprises: a standardized project safety management model base, a standardized safety management scheme template base, a safety management technical standard and safety production management system base, an engineering project danger source database and a dangerous engineering standard base.
In one embodiment, the project management and control module comprises a construction plan management unit and a model association unit;
the construction plan management unit is used for establishing a construction progress plan of the engineering project;
and the model association unit is used for associating the construction progress plan with the engineering project BIM model to obtain the engineering project 4D BIM model, wherein the engineering project 4D BIM model comprises a three-dimensional model of the engineering project and a time shaft set according to the construction progress plan, and the three-dimensional model dynamically changes along with time.
In one embodiment, the project management and control module further comprises a progress updating unit;
the progress updating unit is used for acquiring the actual construction progress information of the engineering project;
and the model association unit is also used for updating the engineering project 4D BIM model according to the actual construction progress information of the engineering project.
In one embodiment, a security analysis module comprises: a critical engineering analysis unit and a formulation unit;
the safety evaluation analysis unit is used for carrying out safety evaluation analysis on the dangerous and large projects in the project by adopting an FTA (fiber to the array) accident tree analysis method and marking dangerous and large project information in the project according to an analysis result;
and the formulating unit is used for formulating a safety precaution path and measures for the critical engineering information in the engineering project.
In one embodiment, the analysis unit for dangerous and large engineering performs safety evaluation analysis on dangerous and large engineering in engineering projects by using an FTA fault tree analysis method, and includes:
1) selecting dangerous large projects in the project as object projects;
2) analyzing the possible danger and abnormal conditions of the object engineering, and determining the top event of the FTA accident tree danger engineering safety analysis system;
3) according to the top event, carrying out layer-by-layer decomposition on the reason event causing the object engineering safety accident, and determining the basic elements of the object engineering safety analysis system, wherein the basic elements are the basic events for triggering the top event;
4) constructing an accident tree of the object engineering safety analysis system according to the logical relationship of the basic events, wherein the lower-layer events in the accident tree represent the trigger events of the upper-layer events, and the lower-layer events are connected with the upper-layer events through an AND gate relationship or an OR gate relationship;
5) simplifying the object engineering accident tree, solving a minimum cut set and a minimum diameter set, carrying out qualitative analysis on the minimum cut set and the minimum diameter set, and determining the structural importance degree sequence of each basic event;
6) carrying out quantitative analysis according to the occurrence probability of each basic event causing the occurrence of the accident, and calculating the occurrence probability of the event on the top of the accident tree;
7) and according to the results of qualitative analysis and quantitative analysis, taking the basic event of which the top event occurrence probability is greater than a set threshold value as a key control factor for the occurrence of the safety accident of the critical engineering.
In one embodiment, the security administration module comprises: the system comprises a construction site information acquisition unit, a safety analysis and evaluation unit and a safety warning unit;
the construction site information acquisition unit is used for acquiring construction site information of dangerous and large projects, wherein the construction site information comprises target image information, environment information and site information recorded through side stations, inspection and safety inspection activities;
the safety analysis and evaluation unit is used for receiving and displaying construction site information, carrying out construction risk evaluation on dangerous projects according to the construction site information, proposing corresponding processing measures and sending a site rectification and modification notice;
the safety warning unit is used for carrying out safety warning in the construction process of the dangerous and large engineering and removing the safety warning after the construction of the dangerous and large engineering is finished; and the control project management and control module updates the 4D BIM model of the engineering project according to the actual engineering progress.
In one embodiment, the job site information acquisition unit includes an image acquisition unit;
the image acquisition unit is used for acquiring construction site image information of dangerous and large projects and sending the construction site images to the safety warning unit;
the safety analysis and evaluation unit also comprises an image processing unit and an image display unit;
the image processing unit is used for decompressing and enhancing the received construction site image and outputting the enhanced construction site image;
the image display unit is used for displaying the enhanced construction site image.
The invention has the beneficial effects that: firstly, establishing an engineering project BIM model as a foundation through a model construction module, and then associating a construction progress plan of an engineering project with the engineering project BIM model through a project management and control module to form an engineering project 4D BIM model which can change along with time; then, the engineering project 4D BIM model capable of dynamic change is used as the basis of dynamic safety supervision, the safety analysis module is used for analyzing dangerous projects in the construction process according to project parameters in the engineering project 4D BIM model, relevant information is marked in the engineering project 4D BIM model, when the actual engineering project advances along with the construction progress according to the engineering project 4D BIM model, when the marked dangerous projects need to be constructed, the safety supervision module is used for acquiring monitoring information of construction site for the dangerous projects in real time, and dynamically and real-timely evaluating the safety risks of the dangerous projects, so that the intelligent level of safety risk management of the engineering project is improved, and the management and accurate control of the dangerous projects can be realized simultaneously by multiple parties such as a supervisor, a manager, a site construction department and the like, by innovating the engineering project safety management mode, organically integrating the BIM technology and the engineering safety evaluation technology, and improving the efficiency of the safety management of the construction engineering project by the targeted hazard source control measures
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a block diagram of the frame of the present invention;
FIG. 2 is a block diagram of a framework of a model building module according to the present invention;
FIG. 3 is a block diagram of a project management module according to the present invention;
FIG. 4 is a block diagram of a security analysis module according to the present invention;
fig. 5 is a frame structure diagram of the security supervision module of the present invention.
Reference numerals:
the system comprises a model building module 1, a project management and control module 2, a safety analysis module 3, a safety supervision module 4, a database building unit 11, a BIM model building unit 12, a construction plan management unit 21, a model association unit 22, a progress updating unit 23, a critical engineering analysis unit 31, a formulation unit 32, a construction site information acquisition unit 41, a safety analysis evaluation unit 42, a safety warning unit 43, an image acquisition unit 411, an image processing unit 421 and an image display unit 422
Detailed Description
The invention is further described in connection with the following application scenarios.
Referring to fig. 1, a BIM-based engineering project intelligent dynamic security supervision system is shown, including:
the model building module 1 is used for building a BIM (building information modeling) model of the engineering project according to the basic information of the engineering project;
the project management and control module 2 is used for associating the construction progress of the project with a project BIM model to form a project 4D BIM model;
the safety analysis module 3 is used for analyzing dangerous and large projects in the engineering project 4D BIM model and marking corresponding dangerous and large project information in the engineering project 4D BIM model;
and the safety supervision module 4 is used for monitoring the field construction process of the dangerous and large engineering, acquiring field safety management information, and performing safety risk assessment and safety risk management according to the field safety management information.
According to the embodiment of the invention, a complete intelligent dynamic safety supervision system is established, firstly, an engineering project BIM model is established through a model construction module as a basis, and then, a project management and control module is used for associating the construction progress plan of the engineering project with the engineering project BIM model to form an engineering project 4D BIM model which can change along with time; then, the engineering project 4D BIM model capable of dynamic change is used as the basis of dynamic safety supervision, the safety analysis module is used for analyzing dangerous projects in the construction process according to project parameters in the engineering project 4D BIM model, relevant information is marked in the engineering project 4D BIM model, when the actual engineering project advances along with the construction progress according to the engineering project 4D BIM model, when the marked dangerous projects need to be constructed, the safety supervision module is used for acquiring monitoring information of construction site for the dangerous projects in real time, and dynamically and real-timely evaluating the safety risks of the dangerous projects, so that the intelligent level of safety risk management of the engineering project is improved, and the management and accurate control of the dangerous projects can be realized simultaneously by multiple parties such as a supervisor, a manager, a site construction department and the like, the efficiency of engineering project safety supervision is improved.
Meanwhile, the intelligent dynamic safety management and control system is beneficial to firstly acquiring basic project information, analyzing the dangerous and large projects in the project information by combining the support of the database, and meanwhile, performing key safety supervision, analysis and management and control on the dangerous and large projects, so that the efficiency of engineering project safety supervision is improved.
In one embodiment, referring to fig. 2, the model building module 1 comprises a database building unit 11 and a BIM model building unit 12; wherein,
the database construction unit 11 is used for constructing an engineering project database, wherein the engineering project database stores data required for constructing a BIM (building information modeling) model of an engineering project;
a BIM model building unit 12, configured to build a BIM model of an engineering project according to basic information of the engineering project, where the basic information of the engineering project includes engineering project drawing information, parameter information, construction process information, project classification information, construction department information, construction standard information, project management standard information, and construction section information; the BIM model of the engineering project comprises a visual three-dimensional model and an engineering project construction progress plan which are established according to a design drawing.
In one embodiment, the engineering project database further comprises: a standardized project safety management model base, a standardized safety management scheme template base, a safety management technical standard and safety production management system base, an engineering project danger source database and a dangerous engineering standard base.
In one scenario, the database construction unit 11 enables a manager to enter relevant data into the database; meanwhile, the database construction unit 11 can also be connected to an external database or a data server, and directly receive corresponding data from the external database or the external data server. The project database stores data required for building a project BIM model, and the data is called when the BIM model building unit 12 builds the project BIM model.
The BIM model building unit 12 can build a BIM model of the engineering project according to the basic information of the engineering project according to the requirement of actual project management and control, and build a visual, simulative and optimizable BIM model of the engineering project through a BIM technology, so that the whole and detailed parts of the engineering project can be displayed, and a foundation is laid for subsequent safety analysis and safety management and control of the engineering project.
In one embodiment, referring to fig. 3, the project management and control module 2 includes a construction plan management unit 21, a model association unit 22;
the construction plan management unit 21 is used for establishing a construction progress plan of a project, and meanwhile, the project plan management unit can also be used for timely modifying and adjusting the existing construction plan or making construction plan records and the like;
and the model association unit 22 is used for associating the construction progress plan with the project BIM model to obtain the project 4D BIM model, wherein the project 4D BIM model comprises a three-dimensional model of the project and a time axis set according to the construction progress plan, and the three-dimensional model dynamically changes along with time.
In one embodiment, the project management and control module 2 further includes a progress updating unit 23;
the progress updating unit 23 is configured to obtain actual construction progress information of the engineering project;
and the model association unit 22 is further configured to update the engineering project 4D BIM model according to the actual construction progress information of the engineering project. The engineering project 4D BIM model comprises the actual construction progress historical information and the construction progress plan historical information which are displayed before the current time.
In one scenario, the project management and control module 2 provides visual display of a project 4D BIM model, the project 4D BIM model is firstly associated with construction progress plan information of a project, and the project comprises a project three-dimensional model which can evolve along with project nodes/time according to a construction plan; engineering project changes generated by the engineering project over time or engineering progress can be displayed through the engineering project 4D BIM model. Meanwhile, the engineering project 4D BIM model can also correlate the actual construction progress information into the engineering project 4D BIM model according to the actual engineering progress, and the current construction progress and the construction progress related information of the historical time/node can be displayed through the engineering project 4D BIM model; the method is beneficial for a manager to compare the planned construction progress with the actual construction progress (such as the difference between the actual construction progress and the planned construction progress in a time node or the time difference between the actual construction progress and the planned construction progress and the like) through the engineering project 4D BIM model along with the change of time, and is beneficial for the manager to manage the construction progress of the engineering project according to the time line, the change condition of the engineering project along with the time is displayed through the engineering project 4DBIM model, and when the actual project reaches a certain node, the corresponding information of the engineering node can be displayed; the 4D BIM model of the engineering project can be dynamically updated according to actual conditions, the efficiency of engineering supervision is improved, and a foundation is laid for the dynamic safety control of the engineering project by the system.
In one embodiment, referring to fig. 4, the security analysis module 3 comprises: a critical engineering analysis unit 31 and a formulation unit 32;
the dangerous and large engineering analysis unit 31 is used for performing safety evaluation analysis on dangerous and large engineering in the engineering project by adopting an FTA (fiber to the array) accident tree analysis method and marking dangerous and large engineering information in the engineering project according to an analysis result;
the formulating unit 32 is used for formulating a safety precaution path and measures for the critical engineering information in the engineering project.
In one scenario, the dangerous and large engineering analysis unit 31 performs safety evaluation analysis on different dangerous and large engineering in the engineering project according to the division of the engineering project by the engineering project 4D BIM model, and performs safety analysis on the dangerous and large engineering by using the FTA fault tree analysis method according to reference information such as the standardized project safety management model library, the standardized safety management scheme template library, the safety management technical standard and safety production management system library, the engineering project danger source database, and the dangerous and large engineering standard library in the engineering project database, in combination with actual construction and management information of the dangerous and large engineering, so as to analyze cause and event of dangerous and large engineering accidents requiring major safety control in the engineering project.
In an embodiment, the analysis unit 31 for dangerous and large engineering performs safety evaluation analysis on dangerous and large engineering in an engineering project by using an FTA fault tree analysis method, and includes:
1) selecting dangerous large projects in the project as object projects;
2) analyzing the possible danger and abnormal conditions of the object engineering, and determining the top event of the FTA accident tree danger engineering safety analysis system;
3) according to the top event, carrying out layer-by-layer decomposition on the reason event causing the object engineering safety accident, and determining the basic elements of the object engineering safety analysis system, wherein the basic elements are the basic events for triggering the top event;
4) constructing an accident tree of the object engineering safety analysis system according to the logical relationship of the basic events, wherein the lower-layer events in the accident tree represent the trigger events of the upper-layer events, and the lower-layer events are connected with the upper-layer events through an AND gate relationship or an OR gate relationship;
5) simplifying the object engineering accident tree, solving a minimum cut set and a minimum diameter set, carrying out qualitative analysis on the minimum cut set and the minimum diameter set, and determining the structural importance degree sequence of each basic event;
6) carrying out quantitative analysis according to the occurrence probability of each basic event causing the occurrence of the accident, and calculating the occurrence probability of the event on the top of the accident tree;
7) and according to the results of qualitative analysis and quantitative analysis, taking the basic event of which the top event occurrence probability is greater than a set threshold value as a key control factor for the occurrence of the safety accident of the critical engineering.
In one scenario, the top event in the FTA accident tree analysis of the critical engineering safety evaluation system is: collapse accidents of the high formwork support system; the basic factors causing casualty safety accidents caused by construction collapse of the high formwork supporting system can be classified as follows: technical and administrative factors; the basic events of the technical factors include: the method comprises the following steps that the load of a support system is over-limited, the materials of components of the support system are unqualified, the support system bears specific basic events which do not meet requirements, the support system is set up to be not in accordance with design requirements and the like; the management factors include: and specific basic events such as non-standard technical management, incapability of construction management, non-in-place supervision and management and the like.
Further, the safety evaluation system FTA accident tree analysis and calculation result of the dangerous and large engineering is obtained: the minimum cut sets in the accident tree indicate the danger of the system, the more the minimum cut sets, the more paths indicating the accident, the more dangerous the system, and conversely, the less the minimum cut sets, the less paths indicating the safety accident, so that the danger of the dangerous engineering safety system can be intuitively reflected by judging the number of the minimum cut sets. Meanwhile, the minimum diameter set represents the safety of the system, the more the minimum diameter sets in the accident tree are, the safer the system is, the more the selectable safety control schemes are, and conversely, the less the minimum diameter sets are, the greater the risk of the system for safety accidents is, and the fewer the safety control paths of the system are. Through the analysis of the minimum diameter set quantity, various dangerous factors which endanger the engineering safety of the safety system of the large engineering can be visually judged, and the important control is carried out on the dangerous factors.
The probability of safety accidents (top events) of the dangerous and large projects can be determined through comprehensive analysis according to the minimum cut set and the minimum diameter set, and basic events of safety systems of the dangerous and large projects are screened by taking the probability as a standard, so that safety analysis can be comprehensively and objectively carried out on the project through FTA accident tree analysis, the dangerous and large projects needing to be subjected to safety control in the project can be accurately obtained, and the accuracy of safety control of the project is improved.
In one embodiment, referring to fig. 5, the security supervision module 4 comprises: a construction site information acquisition unit 41, a safety analysis and evaluation unit 42 and a safety warning unit 43;
the construction site information acquisition unit 41 is used for acquiring construction site information of dangerous and large projects, wherein the construction site information comprises target image information, environment information and site information recorded by side stations and patrol inspection activities;
the safety analysis and evaluation unit 42 is used for receiving and displaying construction site information, carrying out construction risk evaluation on dangerous projects according to the construction site information, proposing corresponding treatment measures and sending a site rectification and modification notice;
the safety warning unit 43 is used for carrying out safety warning in the construction process of the dangerous and large engineering, and removing the safety warning after the construction of the dangerous and large engineering is finished; and the control project management and control module 2 updates the project 4D BIM model according to the actual project progress.
In one scenario, for a dangerous large project in an engineering project analyzed and obtained by the safety analysis module 3, when the engineering progress needs to be constructed, the safety warning unit 43 sends safety warning information to related safety-controlled personnel, the safety supervision module 4 monitors the construction site of the dangerous large project in real time by collecting information of the construction site of the engineering project, and meanwhile, the related personnel can perform real-time analysis and construction risk assessment (for example, analysis is performed by combining safety construction standards in a database, specific construction parameters of a 4D BIM model of the engineering project and the like) according to the information of the construction site of the dangerous large project through the safety analysis and assessment unit 42, and timely provide corresponding safety rectification measures and send a site rectification notice when a potential safety hazard is found. The safety supervision module 4 is used for carrying out safety supervision on dangerous and large projects in the project, and can help safety supervision personnel to carry out unified, real-time and dynamic safety supervision work, so that the efficiency and accuracy of safety supervision on the project are improved, and the real-time performance and the intellectualization of safety supervision are improved.
In one embodiment, the job site information collection unit 41 includes an image collection unit 411;
the image acquisition unit 411 is used for acquiring construction site image information of dangerous and large projects and sending construction site images to the safety warning unit 43;
the security analysis and evaluation unit 42 further includes an image processing unit 421 and an image presentation unit 422;
the image processing unit 421 is configured to decompress and enhance the received construction site image, and output the enhanced construction site image;
the image display unit 422 is used for displaying the enhanced construction site image.
For the safety supervision of engineering projects, it is the most effective measure to provide safety supervision personnel to know the status of a construction site in real time by acquiring images of the construction site of the critical engineering, so the construction site information acquisition unit 41 acquires image pictures of various parts (such as site environment, construction structure and the like) of the critical engineering and sends the image pictures to the safety analysis and evaluation unit 42 for the safety supervision personnel to acquire the construction site information in real time and remotely and make safety analysis according to the construction site information, which is helpful for the safety supervision personnel to visually and integrally know the site construction condition of the critical engineering.
In one embodiment, the image processing unit 421 performs enhancement processing on the construction site image, which specifically includes:
1) adopting guide filtering based on a guide map to decompose the construction site image to obtain a low-frequency component C of the construction site imagev(x, y), wherein the expression function of the low frequency component is:
Cv(x,y)＝u(a,b)D(x,y)+v(a,b)
in the formula, Cv(x, y) represents the gray value of a pixel (x, y) in the low-frequency component, D (x, y) represents the guiding image of the multi-scale guiding filter, wherein the pixel (x, y) belongs to a window w with the size of (2n +1) × (2n +1), (a, b) represents the central pixel of the window, and u (a, b) and v (a, b) represent the linear coefficients in the window, wherein the linear coefficients are obtained by the following solving function:
wherein C (x, y) represents the gray value of the pixel point (x, y) in the construction site image,
indicating a set normalization parameter;
2) for obtaining low frequency component Cv(x, y) is subjected to log removal processing, andobtaining high frequency components
Wherein the logarithmic function is:
in the formula,
representing the logarithmically processed low frequency components,
representing the high-frequency component after logarithmic processing, and C (x, y) representing a construction site image;
3) for logarithm-processed high-frequency component
Performing exponential transformation to obtain high-frequency component image Cd(x, y), and subjecting the image to noise removal processing, and subjecting the noise-removed high-frequency component image C 'to noise removal processing'd(x, y) re-logarithm processing to obtain high-frequency component after noise-removing processing
4) Based on logarithmic low-frequency component
And high frequency components after noise removal processing
Performing enhancement processing to obtain enhanced construction site image in logarithmic domain
5) Enhanced construction site image in the log domain
Performing index reduction processing, and outputting the enhanced construction site image
Wherein the exponential reduction function is:
in the formula,
an enhanced construction site image is represented.
For the reason that the acquisition of the construction site image information is easily affected by various noises and interferences existing in the construction site, the image processing unit 421 disposed in the safety analysis and evaluation unit 42 needs to perform enhancement processing on the received construction site image information, so as to improve the display quality of the construction site image. In the embodiment, a method for enhancing a targeted image is provided in combination with the condition that a construction site has a large amount of noise influence, and the method firstly decomposes an image based on a guided filtering mode, divides the image into a low-frequency part containing a large amount of background information and a high-frequency part containing a large amount of noise and detail information, wherein a conditional solution mode is adopted, so that the acquisition of a low-frequency component can be optimized, the accuracy of the low-frequency component in separating the background information from the construction site image is higher, and the noise influence of the low-frequency part is reduced to the greatest extent; when the corresponding high-frequency part is subjected to denoising treatment, the noise can be treated to the maximum extent, and the denoising effect is indirectly improved; and finally, the low-frequency part and the denoised high-frequency part are fused to obtain a construction site image again, and the original useful information in the image can be retained to the maximum extent while the noise is removed by a mode of separating the high-frequency part and the low-frequency part, so that the enhancement effect is good, and a foundation is laid for safety management and control personnel to accurately judge and evaluate the safety of dangerous and large projects through the construction site image information.
In one embodiment, the low frequency component is logarithmized based on
And high frequency components after noise removal processing
Performing enhancement processing to obtain enhanced construction site image in logarithmic domain
The improvement enhancement function employed therein is:
in the formula,
represents an enhanced construction site image in the logarithmic domain, W represents a set contrast enhancement parameter, σGGlobal gray variance, σ, representing the original construction site imageL(x, y) represents the variance of the gray values of the pixel points in the region with the pixel point as the center (x, y) and the window size of (2n +1) × (2n +1), C (p, q) represents the gray value of the pixel point (p, q) in the construction site image, M (p, q) represents the gray value of the pixel point (p, q) in the construction site imageL(x, y) represents the gray average of the pixel points in the window with the pixel point (x, y) as the center coordinate in the construction site image, wherein,
c (p ', q') represents the gray value of the pixel point (p ', q') in the construction site image.
According to the embodiment of the invention, when the low-frequency component and the high-frequency component are fused to obtain the final enhanced construction site image, the construction site image is further processed in the fusion process, wherein the information according to the original construction site image is creatively added as an adjusting factor in the fusion process, and the fusion proportion of the high-frequency component and the low-frequency component can be adaptively adjusted in the fusion process, so that the visualization degree of the enhanced construction site image is higher, the distortion problem caused in the traditional fusion process is avoided, and the enhancement effect of the construction site image is further improved.
In one embodiment, the logarithmically processed high-frequency components are subjected to a second processing
Performing exponential transformation to obtain high-frequency component image Cd(x, y), and subjecting the image to noise removal processing, and subjecting the noise-removed high-frequency component image C 'to noise removal processing'd(x, y) re-logarithm processing to obtain high-frequency component after noise-removing processing
For the high frequency component image Cd(x, y) performing denoising processing, including:
1) setting a set S of sizes of noise removal processing windowse2e +1, where e ═ {1,2, …, emax}，SeRepresenting the size of the edge of the e-th denoising window as 2e +1, emaxRepresents a set maximum window size;
2) for high frequency component image CdAnd (3) carrying out noise removal processing on the pixel points (x, y) in the (x, y):
21) setting the size parameter e of the initial denoising processing window to be 1;
22) taking the pixel point (x, y) as the central pixel point of the denoising processing window to obtain the maximum gray value h of the pixel point in the denoising processing windowmaxMinimum gray value hminMedian value of gray scale hmedMean value of gray scale hmean；
23) Judgment hmin＜hmed＜hmaxIf true, go to step 24); if not, adjusting the de-noising processing window size parameter e ═ e +1, and executing the step 22 again); if e > emaxThen go directly to step 24)；
24) The pixel point (x, y) is denoised using the following denoising function:
in the formula, H '(x, y) represents the gray value of the pixel point (x, y) in the high-frequency component image after the noise removal processing, H' represents the set edge judgment threshold, and H (x, y) represents the gray value of the pixel point (x, y) in the high-frequency component image;
3) sequentially traversing all pixel points in the high-frequency component image and performing enhancement processing on all pixel points by adopting the step 2) to obtain the high-frequency component image C 'subjected to noise removal processing'd(x,y)。
Aiming at the problem that the electric pulse noise interference condition existing in the construction site environment is serious due to the continuous operation of large-scale construction equipment in the construction site, the embodiment of the invention provides a denoising method aiming at high-frequency components.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be analyzed by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides an engineering project intelligence dynamic security supervisory systems based on BIM which characterized in that includes:
the model building module is used for building a BIM (building information modeling) model of the engineering project according to the basic information of the engineering project;
the project management and control module is used for associating the construction progress of the engineering project with the engineering project BIM model to form an engineering project 4D BIM model;
the safety analysis module is used for analyzing dangerous and large projects in the engineering project 4D BIM model and marking corresponding dangerous and large project information in the engineering project 4D BIM model;
and the safety supervision module is used for monitoring the field construction process of the dangerous and large engineering, acquiring field safety management information, and performing safety risk assessment and safety risk management according to the field safety management information.
2. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 1, wherein the model construction module comprises a database construction unit and a BIM model construction unit; wherein,
the database construction unit is used for constructing an engineering project database, wherein the engineering project database stores data required for constructing a BIM (building information modeling) model of an engineering project;
the BIM model building unit is used for building an engineering project BIM model according to basic information of an engineering project, wherein the basic information of the engineering project comprises engineering project drawing information, parameter information, construction process information, project classification information, construction department information, construction standard information, project management standard information and construction section information; the BIM model of the engineering project comprises a visual three-dimensional model and an engineering project construction progress plan which are established according to a design drawing.
3. The BIM-based engineering project intelligent dynamic security supervision system according to claim 1, wherein the engineering project database further comprises: a standardized project safety management model base, a standardized safety management scheme template base, a safety management technical standard and safety production management system base, an engineering project danger source database and a dangerous engineering standard base.
4. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 1, wherein the project management and control module comprises a construction plan management unit, a model association unit;
the construction plan management unit is used for establishing a construction progress plan of the engineering project;
and the model association unit is used for associating the construction progress plan with the engineering project BIM model to obtain an engineering project 4D BIM model, wherein the engineering project 4D BIM model comprises a three-dimensional model of an engineering project and a time shaft set according to the construction progress plan, and the three-dimensional model dynamically changes along with time.
5. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 4, wherein the project management and control module further comprises a progress updating unit;
the progress updating unit is used for acquiring the actual construction progress information of the engineering project;
and the model association unit is also used for updating the engineering project 4DBIM model according to the actual construction progress information of the engineering project.
6. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 3, wherein the safety analysis module comprises: a critical engineering analysis unit and a formulation unit;
the dangerous and large engineering analysis unit is used for carrying out safety evaluation analysis on dangerous and large engineering in the engineering project by adopting an FTA (fiber to the array) accident tree analysis method and marking dangerous and large engineering information in the engineering project according to an analysis result;
and the formulating unit is used for formulating a safety precaution path and measures for the critical engineering information in the engineering project.
7. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 6, wherein the critical engineering analysis unit adopts FTA accident tree analysis method to perform safety evaluation analysis on critical engineering in engineering projects, comprising:
1) selecting dangerous large projects in the project as object projects;
2) analyzing the possible danger and abnormal conditions of the object project, and determining the top event of the FTA accident tree danger engineering safety analysis system;
3) according to the overhead event, carrying out layer-by-layer decomposition on a reason event causing the object engineering safety accident, and determining a basic element of an object engineering safety analysis system, wherein the basic element is a basic event triggering the overhead event;
4) constructing an accident tree of the object engineering safety analysis system according to the logical relationship of the basic events, wherein the lower layer events in the accident tree represent the trigger events of the upper layer events, and the lower layer events are connected with the upper layer events through an AND gate relationship or an OR gate relationship;
5) simplifying the object engineering accident tree, solving a minimum cut set and a minimum diameter set, carrying out qualitative analysis on the minimum cut set and the minimum diameter set, and determining the structural importance degree sequence of each basic event;
6) carrying out quantitative analysis according to the occurrence probability of each basic event causing the occurrence of the accident, and calculating the occurrence probability of the event on the top of the accident tree;
7) and according to the results of qualitative analysis and quantitative analysis, taking the basic event of which the top event occurrence probability is greater than a set threshold value as a key control factor for the occurrence of the safety accident of the critical engineering.
8. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 1, wherein the safety supervision module comprises: the system comprises a construction site information acquisition unit, a safety analysis and evaluation unit and a safety warning unit;
the construction site information acquisition unit is used for acquiring construction site information of the dangerous and large projects, wherein the construction site information comprises target image information, environment information and site information recorded through side stations, inspection and safety inspection activities;
the safety analysis and evaluation unit is used for receiving and displaying the construction site information, carrying out construction risk evaluation on dangerous projects according to the construction site information, proposing corresponding treatment measures and sending out site rectification and modification notice;
the safety warning unit is used for carrying out safety warning in the construction process of the dangerous and large engineering, and removing the safety warning after the construction of the dangerous and large engineering is finished; and controlling the project management and control module to update the project 4D BIM model according to the actual project progress.
9. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 8, wherein the construction site information acquisition unit comprises an image acquisition unit;
the image acquisition unit is used for acquiring construction site image information of dangerous and large projects and sending the construction site images to the safety warning unit;
the safety analysis and evaluation unit also comprises an image processing unit and an image display unit;
the image processing unit is used for decompressing and enhancing the received construction site image and outputting the enhanced construction site image;
the image display unit is used for displaying the enhanced construction site image.
10. The BIM-based engineering project intelligent dynamic safety supervision system according to claim 9, wherein the image processing unit performs enhancement processing on the construction site image, and specifically comprises:
1) adopting guide filtering based on a guide map to decompose the construction site image to obtain a low-frequency component C of the construction site imagev(x, y), wherein the expression function of the low frequency component is:
Cv(x，y)＝u(a，b)D(x，y)+v(a，b)
in the formula, Cv(x, y) represents the gray value of a pixel (x, y) in the low-frequency component, D (x, y) represents the guiding image of the multi-scale guiding filter, wherein the pixel (x, y) belongs to a window w with the size of (2n +1) × (2n +1), (a, b) represents the central pixel of the window, and u (a, b) and v (a, b) represent the linear coefficients in the window, wherein the linear coefficients are obtained by the following solving function:
wherein C (x, y) represents the gray value of the pixel point (x, y) in the construction site image,
indicating a set normalization parameter;
2) the obtained low-frequency component Cv (x, y) is subjected to log removal processing, and a high-frequency component is obtained
Wherein the logarithmic function is:
in the formula,
representing the logarithmically processed low frequency components,
representing the high-frequency component after logarithmic processing, and C (x, y) representing a construction site image;
3) for logarithm-processed high-frequency component
Performing exponential transformation to obtain high-frequency component image Cd(x, y), and subjecting the image to noise removal processing, and subjecting the noise-removed high-frequency component image C 'to noise removal processing'd(x, y) re-logarithm processing to obtain high-frequency component after noise-removing processing
4) Based on logarithmic low-frequency component
And high frequency components after noise removal processing
Performing enhancement processing to obtain enhanced construction site image in logarithmic domain
5) Enhanced construction site image in the log domain
Performing index reduction processing, and outputting the enhanced construction site image
Wherein the exponential reduction function is:
in the formula,
an enhanced construction site image is represented.
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