Construction engineering construction site personnel positioning and monitoring information fusion system

Abstract

The invention discloses a building engineering construction site personnel positioning and monitoring information fusion system. The system comprises a labor management system, an information fusion system, a monitoring system and a management platform. The monitoring system is installed on a construction site of a building project, and the labor management system, the information fusion system and the management platform are installed in a background monitoring room. The labor management system transmits a labor management ledger to the management platform, the labor management system transmits labor information to the information fusion system and the monitoring system, and the monitoring system transmits position record information and monitoring association information of constructors to the labor management system; the monitoring system transmits signal intensity information, labor information of construction personnel and video frames to the information fusion system, and the information fusion system transmits position parameters of the construction personnel, alarm information, behavior record information of the construction personnel and rendering parameters to the monitoring system; and the monitoring system transmits the rendered video signal to the management platform, and the rendered video signal is displayed by the management platform in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering management, and in particular to a personnel positioning and monitoring information fusion system at a construction engineering construction site. Background Art

[0002] At construction sites, real-name management of labor has become the norm, and workers are tracked and managed. At the same time, video surveillance systems can be widely used in safety assurance and construction process monitoring at construction sites. At present, these two systems usually operate independently and cannot achieve effective information integration. When managers view the monitoring screen, they cannot directly obtain the real-name information of workers, which is not conducive to the efficient execution of construction site management and personnel scheduling. It is mainly manifested in the following aspects:

[0003] 1. Existing construction site monitoring technology mainly relies on video monitoring and manual recording to manage construction personnel, lacking real-time positioning information and high-precision data support.

[0004] 2. The monitoring systems in existing technologies usually operate independently, with a single data source, making it difficult to provide comprehensive and integrated construction site information.

[0005] 3. Although some video surveillance systems are integrated with security warning systems, most of these systems are based on manual triggering or simple rule-based judgments, with delayed responses and low accuracy.

[0006] 4. Existing labor management technologies mainly rely on paper records or simple spreadsheets, lacking identity authentication and visualization of real-time operations.

[0007] 5. The personnel scheduling of existing technologies usually relies on experience and lacks scientific data support, making it difficult to achieve optimal allocation of resources.

[0008] 6. The existing monitoring systems and labor management systems have low modularity and intelligence, making it difficult to cope with future changes in technology and demand.

[0009] Therefore, it is necessary to provide a construction site personnel positioning and monitoring information fusion system that can solve the problem in the prior art that the efficiency of construction site management and personnel scheduling management is affected by the independent operation of labor real-name management and camera monitoring systems. Summary of the invention

[0010] The purpose of the present invention is to provide a construction site personnel positioning and monitoring information fusion system, which can solve the problem in the prior art that the real-name management of labor and the independent operation of the camera monitoring system affect the efficiency of construction site management and personnel scheduling management.

[0011] The present invention is achieved in that:

[0012] A personnel positioning and monitoring information fusion system for a construction project construction site, comprising a labor management system, an information fusion system, a monitoring system and a management platform; the monitoring system is installed at the construction project construction site, and the labor management system, the information fusion system and the management platform are installed in a background monitoring room; the labor management system transmits a labor management ledger to the management platform, the labor management system transmits labor information to the information fusion system and the monitoring system, and the monitoring system transmits location record information and monitoring-related information of construction personnel to the labor management system; the monitoring system transmits signal strength information, labor information of construction personnel and video frames to the information fusion system, and the information fusion system transmits construction personnel location parameters, alarm information, construction personnel behavior record information and rendering parameters to the monitoring system; the monitoring system transmits rendered video signals to the management platform, and the management platform displays in real time a video screen fused with the real-time location and identity information of construction personnel.

[0013] The monitoring system includes a first camera, a second camera, a signal transmitter, a first signal receiver and a second signal receiver; the first camera and the second camera are respectively installed at two different positions of the construction site of the construction project, and the first camera and the second camera transmit video frames to the information fusion system; the first signal receiver is installed next to the first camera, and the second signal receiver is installed next to the second camera; the signal transmitter is embedded in the safety helmet of the construction worker, and the first signal receiver and the second signal receiver respectively collect the signal of the signal transmitter and transmit it to the information fusion system.

[0014] The information fusion system calculates the position parameters of the construction personnel and fuses them with the video images, and the steps include:

[0015] Step 1: Define the origin of the coordinate system (0, 0, 0) at the construction site, then determine the coordinates of the first camera as (x1, y1, z1), and the coordinates of the second camera as (x2, y2, z2);

[0016] Step 2: The signal strength of the signal transmitter collected by the first signal receiver is a, and the signal strength of the signal transmitter collected by the second signal receiver is b;

[0017] Step 3: Based on the relationship between signal strength and distance, it is calculated that the distance between the construction worker and the first camera is A, and the distance between the construction worker and the second camera is B;

[0018] Step 4: According to the spherical equation in three-dimensional space, combined with the parameters (x1, y1, z1), (x2, y2, z2), A and B, the coordinates (x, y, z) of the construction personnel in the construction site coordinate system are calculated;

[0019] Step 5: Establish a first small coordinate system with the first camera as the origin, and calculate the first relative coordinates (△X1, △Y1, △Z1) of the construction personnel in the first small coordinate system through the first small coordinate system;

[0020] Step 6: According to the monitoring angle of the first camera, the plane coordinates (@△X1, @△Y1), i.e., the position parameters, of the construction worker in the video screen of the first camera are calculated;

[0021] Step 7: Establish a second small coordinate system with the second camera as the origin, and calculate the second relative coordinates (△X2, △Y2, △Z2) of the construction personnel in the second small coordinate system through the second small coordinate system;

[0022] Step 8: According to the monitoring angle of the second camera, the plane coordinates (@△X2, @△Y2), i.e., the position parameters, of the construction worker in the video screen of the second camera are calculated;

[0023] Step 9: The identity ID of the signal transmitter corresponds to the identity ID of the construction worker one by one, and steps 1 to 8 are repeated to calculate the location parameters of each construction worker;

[0024] Step 10: The information fusion system generates rendering parameters through time synchronization and space matching algorithms, and fuses the location parameters of the construction workers with the video images based on the rendering parameters.

[0025] Safety risk areas are delineated at the construction site of the construction project, and a dynamic early warning mechanism is provided for each safety risk area. When the location parameters of the construction personnel are within the safety risk area, the information fusion system generates an alarm message through the dynamic early warning mechanism, generates an abnormal event through the alarm message, and archives the record.

[0026] The rendered video signal contains the behavior record of each construction worker, that is, all the actions of the construction workers at the construction site of the construction project. The monitoring system sends the rendered video signal to the labor management system. The labor information of each construction worker is associated with his or her behavior record one by one and archived to form a labor management ledger, so that the labor management system serves as an archive of labor management.

[0027] The management platform includes a large monitoring screen, a computer terminal and a mobile terminal. The large monitoring screen is used to display the rendered video signal in real time, that is, the video screen with construction personnel information. The computer terminal and the mobile terminal access and view the rendered video signal.

[0028] The rendered video signal includes a plan view and a three-dimensional model view of the construction site of the building project, and both the plan view and the three-dimensional model view are marked with the real-time location parameters of the construction workers as well as their names, positions, and behavior records.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention integrates the location parameters, identity and other information of the construction workers with the video images to ensure that the identity of each construction worker is bound to his or her behavior. The information fusion system coordinates the labor management system and the monitoring system, and uses the management platform to display and render video images with information such as the location and identity of the construction workers in real time and intuitively. It can also automatically identify potential safety risks and issue alarm information in a timely manner, providing multi-dimensional and multi-faceted on-site information, which is beneficial for the unified management and scheduling of construction workers and construction conditions by back-end management personnel, improving the construction safety and management efficiency of the construction site, and providing more comprehensive and scientific data support for management decisions.

[0031] 2. The present invention can use Bluetooth / UWB technology to calculate the position parameters of construction workers in real time through the signal strength between the signal transmitter and the first signal receiver and the second signal receiver at the construction site of the construction project, so as to perform high-precision three-dimensional positioning of the construction workers and ensure the real-time and accuracy of the position parameters. At the same time, the first camera and the second camera collect the video images of the scene, so as to render the position parameters of the construction workers on the video images, and realize the dual functions of position positioning and behavior monitoring of the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the construction site personnel positioning and monitoring information fusion system of the present invention;

[0033] Figure 2 It is an architecture diagram of the monitoring system in the construction site personnel positioning and monitoring information fusion system of the present invention, and the direction of the arrow in the figure is the direction of data flow.

[0034] In the figure, 1 is the first camera, 2 is the second camera, 3 is the signal transmitter, 4 is the first signal receiver, 5 is the second signal receiver, 6 is the labor management system, 7 is the information fusion system, 8 is the monitoring system, and 9 is the management platform. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Please see attached Figure 1A construction site personnel positioning and monitoring information fusion system, comprising a labor management system 6, an information fusion system 7, a monitoring system 8 and a management platform 9; the monitoring system 8 is installed at the construction site of the construction project, and the labor management system 6, the information fusion system 7 and the management platform 9 can be installed in the background monitoring room; the labor management system 6 transmits the labor management ledger to the management platform 9, the labor management system 6 transmits the labor information to the information fusion system 7 and the monitoring system 8, and the monitoring system 8 transmits the location record information and monitoring related information of the construction personnel to the labor management system 6; the monitoring system 8 transmits the signal strength information, the identity ID of the construction personnel and other labor information and video frames to the information fusion system 7, and the information fusion system 7 transmits the location parameters of the construction personnel, the alarm information, the behavior record information of the construction personnel and the rendering parameters to the monitoring system 8; the monitoring system 8 transmits the rendered video signal to the management platform 9, and the management platform 9 displays the video screen integrated with the real-time location and identity information of the construction personnel in real time.

[0037] Through the labor management system 6 based on the existing labor real-name management technology, by registering each construction worker with real name, it is convenient to manage and identify all construction workers, ensuring that the identity and information of each construction worker can be accurately tracked and recorded.

[0038] The labor management system 6, information fusion system 7, monitoring system 8 and management platform 9 use wireless networks, wired networks and other means to transmit data to ensure the integrity and security of data transmission. It can also adopt modular design, be easy to expand and upgrade, and be able to flexibly respond to future technology and market development needs.

[0039] The management platform 9 is used to receive the rendered video signal from the monitoring system 8 and the labor management ledger of the labor management system 6 to facilitate unified management.

[0040] Please see attached Figure 2 The monitoring system 8 includes a first camera 1, a second camera 2, a signal transmitter 3, a first signal receiver 4 and a second signal receiver 5; the first camera 1 and the second camera 2 are respectively installed at two different positions on the construction site of the construction project, and the first camera 1 and the second camera 2 transmit video frames to the information fusion system 7; the first signal receiver 4 is installed next to the first camera 1, and the second signal receiver 5 is installed next to the second camera 2; the signal transmitter 3 is embedded in the safety helmet of the construction worker, and the first signal receiver 4 and the second signal receiver 5 respectively collect the signal of the signal transmitter 3 and transmit it to the information fusion system 7.

[0041] Preferably, the first signal receiver 4 and the second signal receiver 5 can adopt the positioning base station (receiver) of the existing technology, and the signal transmitter 3 can adopt the transmitter based on Bluetooth / UWB (Ultra-WideBand) technology of the existing technology, which is used to periodically transmit signals to the first signal receiver 4 and the second signal receiver 5.

[0042] The base station and the transmitters of each construction worker form a positioning network through wireless communication. For short-distance wireless communication, the signal transmitter 3 can communicate with the first signal receiver 4 and the second signal receiver 5 based on Bluetooth technology, and track and record the location of the construction workers in real time through the real-time positioning system (RTLS) of the existing technology. UWB is a high-precision positioning technology that can accurately locate the location of construction workers in three-dimensional space with higher accuracy than Bluetooth technology. The corresponding communication method can be selected according to the actual application needs of the construction site of the construction project to ensure the high accuracy and immediacy of the data, so that managers can obtain the precise location and movement of workers in real time.

[0043] Since construction workers at construction sites must wear safety helmets, the signal transmitter 3 is integrated into the safety helmets to obtain and transmit the construction workers' location information in real time, ensuring the safety of the construction workers at the construction sites and improving the real-time acquisition of each construction worker's location parameters; it also facilitates the identification of construction workers who are not wearing safety helmets, thereby improving the safety of construction management.

[0044] The first camera 1 and the second camera 2 can adopt conventional monitoring camera systems at construction sites, which usually include functions such as high-definition camera, video storage and analysis, among which the high-definition camera is used to monitor the construction site of the construction project in all directions without blind spots, the video storage can be used to store high-definition camera videos, and the analysis can be based on existing technologies such as image processing and face recognition to identify construction personnel. The number of cameras can be adaptively adjusted according to actual needs.

[0045] Please see attached Figure 1 and attached Figure 2 The information fusion system 7 calculates the position parameters of the construction personnel and fuses them with the video images, and the steps include:

[0046] Step 1: Define the origin of the coordinate system (0, 0, 0) at the construction site of the building project, then the coordinates of the first camera 1 can be determined to be (x1, y1, z1), and the coordinates of the second camera 2 can be determined to be (x2, y2, z2).

[0047] Preferably, a certain point of the project (such as the location of the backstage monitoring room) can be used as the origin of the coordinate system.

[0048] Step 2: The signal strength of the signal transmitter 3 collected by the first signal receiver 4 is a, and the signal strength of the signal transmitter 3 collected by the second signal receiver 5 is b.

[0049] Through Bluetooth or UWB technology, the first signal receiver 4 and the second signal receiver 5 can obtain the strength of the signal of the signal transmitter 3 .

[0050] Step 3: Based on the relationship between signal strength and distance, it can be calculated that the distance between the construction worker and the first camera 1 is A, and the distance between the construction worker and the second camera 2 is B.

[0051] According to the specific specifications and models of the signal transmitter 3, the first signal receiver 4 and the second signal receiver 5, the relationship between the signal strength and the distance can be determined, that is, the stronger the signal strength, the closer the distance, and vice versa, the weaker the signal strength, the farther the distance. Calculating the distance by signal strength is a commonly used calculation method in the art, and its calculation process will not be repeated here.

[0052] Since the first signal receiver 4 is installed close to the first camera 1, the first signal receiver 4 and the first camera 1 can be regarded as being located at the same coordinate. Similarly, the second signal receiver 5 and the second camera 2 can be regarded as being located at the same coordinate, which facilitates the calculation of distance A and distance B.

[0053] Step 4: Based on the spherical equation in three-dimensional space, combined with the parameters (x1, y1, z1), (x2, y2, z2), A and B, the coordinates (x, y, z) of the construction workers in the coordinate system of the construction site can be calculated.

[0054] According to the actual use requirements, more than two signal receivers can be set. In order to facilitate the calculation of the three-dimensional coordinate positioning technology, at least two signal receivers should be set. The spherical equation of the three-dimensional coordinate positioning technology is a conventional calculation method in this field, and its calculation process is not repeated here.

[0055] Step 5: Establish a first small coordinate system with the first camera 1 as the origin, and the first relative coordinates (△X1, △Y1, △Z1) of the construction personnel in the first small coordinate system can be calculated through the first small coordinate system.

[0056] Step 6: According to the monitoring angle of the first camera 1, the plane coordinates (@△X1, @△Y1) of the construction worker in the video screen of the first camera 1, that is, the position parameters, can be calculated as the specific position of the construction worker under the monitoring angle of the first camera 1.

[0057] Step 7: Establish a second small coordinate system with the second camera 2 as the origin, and the second relative coordinates (△X2, △Y2, △Z2) of the construction personnel in the second small coordinate system can be calculated through the second small coordinate system.

[0058] Step 8: According to the monitoring angle of the second camera 2, the plane coordinates (@△X2, @△Y2) of the construction worker in the video screen of the second camera 2, that is, the position parameters, can be calculated as the specific position of the construction worker under the monitoring angle of the second camera 2.

[0059] When using UWB technology, the location parameters of construction workers can be calculated by combining the flight time (ToF) of the measured signal, and the calculation accuracy can reach the centimeter level. When using Bluetooth technology, the location parameters of construction workers are calculated by combining the received signal strength indication (RSSI), and the accuracy is slightly lower than that of UWB technology, but the cost is lower.

[0060] Step 9: The identity ID of the signal transmitter 3 corresponds to the identity ID of the construction worker one by one, and steps 1 to 8 are repeated to calculate the position parameters of each construction worker.

[0061] Step 10: The information fusion system 7 generates rendering parameters through time synchronization and space matching algorithms, and fuses the location parameters of the construction workers with the video images according to the rendering parameters.

[0062] Time synchronization and space matching algorithms are commonly used calculation methods in this field, and their calculation process will not be described here.

[0063] The information fusion system 7 receives multi-source data such as video frames from the monitoring system 8 and labor information from the labor management system 6, and analyzes and processes the multi-source data to provide back-end managers with an intuitive display interface, i.e., rendered video signals, thereby providing scientific data support for the decision-making of back-end managers.

[0064] Safety risk areas are delineated at the construction site of the construction project, such as high-altitude work areas, equipment operation areas, etc., and a dynamic early warning mechanism is provided for each safety risk area; when the location parameters of the construction personnel are within the safety risk area, the information fusion system 7 generates an alarm message through the dynamic early warning mechanism, and abnormal events can be generated through the alarm information, and archived and recorded for easy query in the subsequent management process.

[0065] The alarm information can be directly sent to the management platform 9 via the wireless network, so that the backstage management personnel can manually intervene in the safety alarm information in time, thereby avoiding the existence of safety hazards or safety accidents at the construction site of the construction project and ensuring safe construction. Through the setting of the safety risk area and its dynamic early warning mechanism, the abnormal event of the construction personnel entering the safety risk area is identified by using the abnormal detection algorithm based on machine learning, and the video frame is input into the abnormal detection algorithm. When the construction personnel enter the safety risk area, the abnormal detection algorithm outputs the alarm information, which can foresee the potential safety risks and quickly trigger the early warning. The early warning is timely and accurate. The early warning greatly improves the response speed and accuracy of the safety management of the construction site of the construction project, and reduces the possibility of accidents.

[0066] The rendered video signal contains the behavior record of each construction worker, that is, all the actions of the construction workers at the construction site of the construction project, such as entering the safety risk area, gathering of people, etc., and behaviors such as not wearing safety equipment can also be defined according to the safety construction requirements to improve the monitoring safety; the monitoring system 8 sends the rendered video signal to the labor management system 6. Based on the identity ID, the labor information of each construction worker is associated with his or her behavior record one by one and archived and stored as monitoring related information to form a labor management ledger, so that the labor management system 6 serves as an archive of labor management.

[0067] The management platform 9 includes a large monitoring screen, a computer terminal and a mobile terminal. The large monitoring screen is used to display the rendered video signal in real time, that is, a video screen with labor information, location parameters and other information of the construction workers. The computer terminal and the mobile terminal can access and view the rendered video signal through a local area network or the like. The rendered video signal includes a plan view, a three-dimensional model view, etc. of the construction site of the construction project. The plan view and the three-dimensional model view are marked with the real-time location parameters of the construction workers as well as information such as their names, positions, and behavior records. The display is intuitive and real-time, and the acquisition of labor information is convenient, direct and accurate, which facilitates the efficient management and timely dispatch of construction workers by back-end management personnel, greatly improving the operational convenience and practicality of the entire system.

[0068] The computer and mobile terminals of the management platform 9 can be used to store all historical data, including the location parameters of construction personnel and the motion trajectories they form, video signals, abnormal event records, etc., and support multi-dimensional query and analysis by time, location, personnel, etc.

[0069] By binding the identity ID of the signal transmitter 3 to the identity ID of the construction worker one by one, when a construction worker appears in a specific area in the video screen, the labor information, historical behavior records, etc. of the construction worker can be displayed through the video screen, realizing the information fusion and interaction of the two major systems of the video monitoring system and the labor management system.

[0070] Preferably, the display screen of the monitoring large screen can adopt a user-friendly interface design, so that the back-end management personnel can easily and quickly obtain and use the information rendered in the video screen, and the management transparency and standardization are high.

[0071] Based on the location information of the construction personnel and in combination with the construction progress, the backstage management personnel can optimize the scheduling of the construction personnel and the allocation of equipment, which is conducive to improving construction efficiency and resource utilization and reducing management costs. Preferably, the deep self-learning model technology of the prior art can be used to carry a personnel scheduling optimization model in the management platform 9 to realize the automatic scheduling optimization of the construction personnel, which can ensure the efficient execution of key construction nodes and the rationality of personnel allocation, and improve the intelligence level of the entire system. At the same time, through the long-term accumulation of historical data of the construction site of the construction project, the personnel scheduling optimization model can analyze the behavioral habits of the construction personnel, the laws of accident occurrence on the site, etc., and provide more scientific data support for the backstage management personnel to optimize the construction process and safety management system.

[0072] Compared with the prior art, the present invention has the following advantages:

[0073] 1. In terms of improving management efficiency, by integrating the location information of construction workers in the real-name labor management with the video images of the monitoring system, the back-end management personnel can more conveniently, quickly and accurately understand the specific location of each construction worker at the construction site and their corresponding real-time work status, that is, behavior records. There is no need to obtain information from different systems separately and then integrate and analyze it, which greatly saves management time and energy, thereby improving the overall management efficiency of the construction site.

[0074] 2. In terms of enhanced security, once a safety accident or emergency occurs, the fused video information can be used to quickly locate the location of the construction personnel involved, and the surrounding situation can be viewed in conjunction with the monitoring system, so that emergency response measures such as rescue and evacuation can be carried out in a timely manner, effectively improving the ability to respond to emergencies and enhancing the safety of the construction site.

[0075] 3. In terms of optimizing resource allocation, the information fusion system 7 integrates the labor information, location parameters and video images of construction workers, so as to more accurately grasp the distribution and operation status of construction workers in different areas, and then reasonably allocate human, material and other resources. For example, according to the number of construction workers and work progress in each area, the allocation of construction equipment and materials can be adjusted in time to avoid idle resources or excessive concentration of resources in certain areas, so as to achieve optimal allocation of resources.

[0076] 4. In terms of standardized labor management, after the integration of construction workers' labor information, location parameters and video images, the attendance, on-the-job time, work trajectory, behavior, etc. of construction workers can be better monitored and recorded, ensuring the effective implementation of real-name labor management, preventing violations such as impersonation and false attendance, and further standardizing the labor management process at the construction site.

[0077] 5. To improve the accuracy of monitoring and management, by using Bluetooth / UWB technology to obtain the three-dimensional coordinates of construction workers and synchronizing them with the monitoring screen in real time, the back-end management personnel can accurately locate and identify the construction workers on the construction site, thereby improving the accuracy of monitoring and management.

[0078] 6. To enhance the real-time early warning of construction workers’ safety, the real-time video of the monitoring system is used to identify abnormal events of construction workers entering safety risk areas using an anomaly detection algorithm based on machine learning. At the same time, the real-name information and real-time location parameters of the construction workers are combined to achieve more accurate and rapid safety warnings, so that emergency measures can be taken early to reduce the possibility of accidents.

[0079] 7. Optimize personnel scheduling and construction process. Utilize the data analysis function of the information fusion system 7 to grasp the location distribution and work status of construction personnel in real time, optimize the scheduling of construction personnel and work process, and improve construction efficiency and on-site management level.

[0080] 8. In terms of improving data management and analysis capabilities, a unified data platform is used to accumulate and manage a large amount of data on the construction site, including the real-name information of construction workers, activity trajectories, surveillance videos, etc., to provide reliable support for subsequent big data analysis and decision-making, and promote the intelligent and scientific management model.

[0081] 9. To achieve information transparency and standardized operations, by integrating the real-name system for labor and the monitoring system 8, we can ensure that all operations and activities of construction personnel at the construction site can be traced, enhance transparency, and promote the standardization and regularization of construction management.

[0082] 10. In terms of promoting the construction of smart construction sites, the implementation of the present invention will help promote the development of construction site management of construction projects towards digitalization, informatization and intelligence, lay the foundation for the construction of "smart construction sites", and improve the level of modern management of the entire construction industry.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction site personnel positioning and monitoring information fusion system, characterized by: The system comprises a labor management system (6), an information fusion system (7), a monitoring system (8) and a management platform (9); the monitoring system (8) is installed at a construction site of a construction project, and the labor management system (6), the information fusion system (7) and the management platform (9) are installed in a back-end monitoring room; the labor management system (6) transmits a labor management ledger to the management platform (9), the labor management system (6) transmits labor information to the information fusion system (7) and the monitoring system (8), and the monitoring system (8) transmits location record information and monitoring related information of construction personnel to the labor management system (6); the monitoring system (8) transmits signal strength information, labor information of construction personnel and video frames to the information fusion system (7), and the information fusion system (7) transmits location parameters of construction personnel, alarm information, behavior record information of construction personnel and rendering parameters to the monitoring system (8); the monitoring system (8) transmits rendered video signals to the management platform (9), and the management platform (9) displays in real time a video screen fused with the real-time location and identity information of construction personnel.

2. The construction site personnel positioning and monitoring information fusion system according to claim 1 is characterized by: The monitoring system (8) comprises a first camera (1), a second camera (2), a signal transmitter (3), a first signal receiver (4) and a second signal receiver (5); the first camera (1) and the second camera (2) are respectively installed at two different locations on the construction site of the building project, and the first camera (1) and the second camera (2) transmit video frames to the information fusion system (7); the first signal receiver (4) is installed beside the first camera (1), and the second signal receiver (5) is installed beside the second camera (2); the signal transmitter (3) is embedded in the safety helmet of the construction worker, and the first signal receiver (4) and the second signal receiver (5) respectively collect the signal of the signal transmitter (3) and transmit it to the information fusion system (7).

3. The construction site personnel positioning and monitoring information fusion system according to claim 2 is characterized by: The information fusion system (7) calculates the position parameters of the construction personnel and fuses them with the video images, and the steps include: Step 1: Define the origin of the coordinate system (0, 0, 0) at the construction site of the building project, then determine the coordinates of the first camera (1) to be (x1, y1, z1), and the coordinates of the second camera (2) to be (x2, y2, z2); Step 2: The signal strength of the signal transmitter (3) collected by the first signal receiver (4) is a, and the signal strength of the signal transmitter (3) collected by the second signal receiver (5) is b; Step 3: Based on the relationship between signal strength and distance, calculate that the distance between the construction worker and the first camera (1) is A, and the distance between the construction worker and the second camera (2) is B; Step 4: According to the spherical equation in three-dimensional space, combined with the parameters (x1, y1, z1), (x2, y2, z2), A and B, the coordinates (x, y, z) of the construction personnel in the construction site coordinate system are calculated; Step 5: Establish a first small coordinate system with the first camera (1) as the origin, and calculate the first relative coordinates (△X1, △Y1, △Z1) of the construction personnel in the first small coordinate system through the first small coordinate system; Step 6: According to the monitoring angle of the first camera (1), the plane coordinates (@△X1, @△Y1), i.e., the position parameters, of the construction worker in the video image of the first camera (1) are calculated; Step 7: Establish a second small coordinate system with the second camera (2) as the origin, and calculate the second relative coordinates (△X2, △Y2, △Z2) of the construction worker in the second small coordinate system through the second small coordinate system; Step 8: According to the monitoring angle of the second camera (2), the plane coordinates (@△X2, @△Y2), i.e., the position parameters, of the construction worker in the video image of the second camera (2) are calculated; Step 9: The identity ID of the signal transmitter (3) corresponds to the identity ID of the construction worker one by one, and steps 1 to 8 are repeated to calculate the location parameters of each construction worker; Step 10: The information fusion system (7) generates rendering parameters through time synchronization and space matching algorithms, and fuses the location parameters of the construction workers with the video images based on the rendering parameters.

4. The construction site personnel positioning and monitoring information fusion system according to claim 3 is characterized by: Safety risk areas are delineated at the construction site of the construction project, and a dynamic early warning mechanism is provided for each safety risk area; when the location parameters of the construction personnel are within the safety risk area, the information fusion system (7) generates alarm information through the dynamic early warning mechanism, generates abnormal events through the alarm information, and archives and records them.

5. The construction site personnel positioning and monitoring information fusion system of claim 3 is characterized by: The rendered video signal contains the behavior record of each construction worker, that is, all the actions of the construction worker at the construction site of the building project. The monitoring system (8) sends the rendered video signal to the labor management system (6). The labor information of each construction worker is associated with his / her behavior record in a one-to-one correspondence and archived to form a labor management ledger, so that the labor management system (6) serves as a labor management archive.

6. The construction site personnel positioning and monitoring information fusion system according to claim 3 is characterized by: The management platform (9) includes a large monitoring screen, a computer terminal and a mobile terminal. The large monitoring screen is used to display the rendered video signal in real time, that is, the video screen with construction personnel information. The computer terminal and the mobile terminal access and view the rendered video signal.

7. The construction site personnel positioning and monitoring information fusion system of claim 6 is characterized by: The rendered video signal includes a plan view and a three-dimensional model view of the construction site of the building project, and both the plan view and the three-dimensional model view are marked with the real-time location parameters of the construction workers as well as their names, positions, and behavior records.

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