Foundation pit gas film environment monitoring system

Abstract

The invention is suitable for the technical field of foundation pit gas film monitoring, and provides a foundation pit gas film environment monitoring system which can monitor the normal use performance and the stress characteristic of a current gas film building, that is to say, the comprehensive performance monitoring of the performance of the gas film building can be realized by utilizing the characteristics of monitoring systems of all branches; according to the invention, the system is simple in structure, facilitates the mastering and control of the building performance, solves the problem that an air film building lacks an effective monitoring means at present, effectively prevents the film collapse accident caused when the large-space air-filled film building deals with the snowy weather, can give an early warning in advance to inform related personnel to remove the danger, and avoids the occurrence of safety accidents. The technical problem that an existing adopted constant-pressure control strategy cannot effectively prevent the film top from collapsing during heavy snow load is solved, long-term monitoring of data is facilitated, automatic collection and transmission of monitoring data are achieved through the field monitoring data collection subsystem, and early warning and real-time issuing of monitoring information are achieved through the early warning and information issuing subsystem.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit air film monitoring, and in particular relates to a foundation pit air film environment monitoring system. Background Art

[0002] Air-supported buildings use special building membrane materials as the outer shell, and steel cables are laid on the membrane surface, using the positive pressure of air (usually the pressure difference between the inside and outside is about 250Pa) to support the main body of the building. Due to its novel shape, low cost, short construction period, low energy consumption, and large span, it has been widely used in the industrial and civil construction markets. However, since air-supported buildings are supported by indoor gas, they are often affected by external factors such as wind and snow loads during operation. The building has large deformation and high deformation frequency. When the weather is abnormal, the internal and external pressure difference needs to be adjusted in time. In addition, the surface wind pressure, building dynamic characteristics, support internal force, and steel cable tension of air-supported buildings need to be effectively monitored during construction and operation to grasp the stress state of the building. Finally, real-time control and adjustment of relevant parameters of the membrane environment to provide a good environment for people living and working in the building is very necessary for the widespread application of air-supported buildings in the industrial and civil construction industries.

[0003] The prior art still has the following deficiencies:

[0004] Due to the lack of effective monitoring methods, the existing technology fails to timely grasp the stress parameters of the air membrane, resulting in the collapse of the air membrane building in abnormal weather. The existing method of adding wind speed and wind direction sensors can improve the impact of wind on the appearance of the membrane building; however, in the measures to deal with the impact of snow accumulation on the membrane top on the appearance of the membrane building, either the measures are too simple and unreliable, or the cost is too high and the cost performance is not high. The existing inflatable membrane building needs to control the internal pressure according to the actual feedback of the load and flexibly adjust the structural stiffness. At present, it mainly relies on experience and wind force level conditions, and manually controls the fan air intake according to a fixed mode to achieve internal pressure regulation. There is a lack of automated internal pressure control methods based on statistical data. Summary of the invention

[0005] The present invention provides a foundation pit air membrane environment monitoring system, aiming to solve the problem that the existing technology lacks effective monitoring means and fails to timely grasp the force parameters of the air membrane, resulting in the collapse of the air membrane building in abnormal weather. The existing method of adding wind speed and wind direction sensors can improve the influence of wind on the appearance of the membrane building; but in the measures to deal with the influence of snow accumulation on the membrane top on the appearance of the membrane building, either the measures are too simple and unreliable, or the cost is too high and the cost performance is not high. The existing inflatable membrane building needs to control the internal pressure according to the actual load feedback and flexibly adjust the structural stiffness. At present, it mainly relies on experience and wind force level conditions, and the internal pressure adjustment is realized by manually controlling the fan air intake according to a fixed mode, and there is a lack of an automated internal pressure control method based on statistical data.

[0006] The present invention is implemented as follows: a foundation pit air film environment monitoring system includes: a wind load effect monitoring system for obtaining wind speed around the air film building and wind speed on the surface of the air film building, a vibration monitoring system for obtaining vibration data of the air film building, a support reaction force monitoring system for obtaining the force on the support of the air film building, an anchor tension detection system for obtaining the anchor stress of the air film building, an air film internal environment detection system, a system for monitoring the deformation of the inflatable film building, and a data processing server.

[0007] Preferably, the wind load monitoring system, vibration monitoring system, support reaction force monitoring system, anchor cable tension detection system, and air film internal environment detection system are all connected to a data processing server.

[0008] Preferably, the system for monitoring deformation of an inflatable membrane building includes a collection unit, an operation processing unit, a power supply unit and a remote monitoring unit. The collection unit is composed of a displacement sensor for collecting membrane deformation signals and a signal conversion module. The signal output end of the displacement sensor is connected to the input end of the signal conversion module. The signal conversion module converts the current signal of the displacement sensor into a corresponding digital signal and sends it to the operation module of the operation processing unit.

[0009] Preferably, the operation processing unit includes an operation module, a control module and a wireless data transceiver module. The operation module summarizes and processes the received digital signals to obtain the elongation of the inflatable membrane collected by the displacement sensor installed on the top of the air membrane at each collection time, and transmits the elongation to the control module. After receiving the elongation data, the control module performs comprehensive calculations on the received elongation data to obtain the horizontal displacement and vertical displacement of the inflatable membrane deformation at the top of the membrane, and sends the obtained horizontal displacement and vertical displacement of the inflatable membrane deformation to the remote monitoring unit through the wireless data transceiver module; after receiving the inflatable membrane deformation, the remote monitoring unit compares it with the inflatable membrane threshold pre-stored in the unit and stores it in the storage module at the same time; when the inflatable membrane deformation exceeds the set threshold, an early warning message is issued; the power supply unit is connected to the collection unit and the operation processing unit to provide power for them.

[0010] Preferably, the system for monitoring the deformation of an inflatable membrane building also includes a three-dimensional acceleration sensor on the membrane surface, a wind pressure sensor on the membrane surface, a high-precision GNSS displacement monitoring module on the membrane surface, and an inflatable membrane differential pressure gauge. The system for monitoring the deformation of an inflatable membrane building is connected to the data processing server. The three-dimensional acceleration sensor on the membrane surface, the wind pressure sensor on the membrane surface, and the high-precision GNSS displacement monitoring module on the membrane surface are respectively connected to the cable net connecting angle plate by means of hexagon socket bolts and through gasket-type, cover-type, and magnetic adsorption-type connectors. The cable net connecting angle plate is installed on the surface of the inflatable membrane building.

[0011] Preferably, the wind load effect monitoring system includes wind pressure, wind speed and wind direction.

[0012] Preferably, a cloud server is also included, the cloud server and the data processing server, the data processing server is also connected to a data analysis processor, the cloud server is also connected to a field monitoring data acquisition subsystem, the field monitoring data acquisition subsystem is used to monitor multiple monitoring points at the construction site in real time to obtain monitoring data, and upload the monitoring data to the cloud server, the monitoring points are respectively the wind load monitoring system, the vibration monitoring system, the support reaction monitoring system, the anchor tension detection system, the air membrane internal environment detection system and the inflatable membrane building deformation monitoring system, the data analysis processor is used to predict the monitoring data through an artificial neural network to generate the predicted data, generate an analysis data report, and store the data, while predicting possible data changes.

[0013] Preferably, the cloud server is also connected to an early warning and information release subsystem, and the early warning and information release subsystem is used to remind the staff according to the early warning information sent by the cloud server. The early warning and information release subsystem is also used to prompt the staff of the danger level.

[0014] Preferably, the air membrane internal environment detection system includes sensors for detecting the internal environment and working parameters of the air membrane building, and the anchor cable tension detection system includes at least one magnetic flux sensor for obtaining the stress of the anchor cable of the air membrane building.

[0015] Preferably, the warning and information release subsystem reminds the staff by one or more of text messages, emails, broadcasts and display screens.

[0016] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0017] The present invention can monitor the normal use performance and stress characteristics of the current air membrane building, that is, the present invention can utilize the characteristics of each branch monitoring system to realize the comprehensive performance monitoring of the air membrane building performance, which is conducive to the mastery and control of the building performance. The present invention can meet the current domestic and foreign demand for air membrane building monitoring, solve the problem of the lack of effective monitoring means for air membrane buildings, and effectively prevent the membrane collapse accidents caused by large-space inflatable membrane buildings in response to heavy snow weather. By monitoring the deformation, it can warn and notify relevant personnel in advance to eliminate the danger and avoid the occurrence of safety accidents. The technical problem that the existing constant pressure control strategy cannot effectively prevent the membrane top from collapsing under heavy snow load is solved, and it is convenient to monitor the data for a long time. The automatic collection and transmission of monitoring data is realized through the on-site monitoring data acquisition subsystem, and the early warning and real-time release of monitoring information is realized through the early warning and information release subsystem. The system provides a new way to establish an information platform for the management of large-scale urban foundation pit projects, greatly improving the automation and intelligence level of on-site information management, prediction and early warning, and thus also provides new reference and technical support for the safety monitoring and management during the construction of other similar large-scale projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a foundation pit air film environment monitoring system of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the system for monitoring deformation of an inflatable membrane building according to the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the cloud server of the present invention; DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] An embodiment of the present invention provides a foundation pit air film environment monitoring system, as shown in the figure, including: a wind load effect monitoring system for obtaining wind speed around the air film building and wind speed on the surface of the air film building, a vibration monitoring system for obtaining vibration data of the air film building, a support reaction force monitoring system for obtaining the force on the support of the air film building, an anchor tension detection system for obtaining the anchor stress of the air film building, an air film internal environment detection system, a system for monitoring the deformation of the inflatable film building, and a data processing server.

[0024] The wind load monitoring system, vibration monitoring system, support reaction force monitoring system, anchor cable tension detection system, and air film internal environment detection system are all connected to the data processing server.

[0025] The system for monitoring the deformation of an inflatable membrane building includes a collection unit, an operation processing unit, a power supply unit and a remote monitoring unit. The collection unit is composed of a displacement sensor for collecting membrane deformation signals and a signal conversion module. The signal output end of the displacement sensor is connected to the input end of the signal conversion module. The signal conversion module converts the current signal of the displacement sensor into a corresponding digital signal and sends it to the operation module of the operation processing unit.

[0026] The operation processing unit includes an operation module, a control module and a wireless data transceiver module. The operation module summarizes and processes the received digital signals to obtain the elongation of the inflatable membrane collected by the displacement sensor installed on the top of the air membrane at each collection time, and transmits the elongation to the control module. After receiving the elongation data, the control module performs comprehensive calculations on the received elongation data to obtain the horizontal displacement and vertical displacement of the inflatable membrane deformation at the top of the membrane, and sends the obtained horizontal displacement and vertical displacement of the inflatable membrane deformation to the remote monitoring unit through the wireless data transceiver module; after receiving the inflatable membrane deformation, the remote monitoring unit compares it with the inflatable membrane threshold value pre-stored in the unit and stores it in the storage module at the same time. When the inflatable membrane deformation exceeds the set threshold, an early warning message is issued; the power supply unit is connected to the collection unit and the operation processing unit to provide power for them.

[0027] The system for monitoring the deformation of inflatable membrane buildings also includes a three-dimensional acceleration sensor on the membrane surface, a wind pressure sensor on the membrane surface, a high-precision GNSS displacement monitoring module on the membrane surface, and an inflatable membrane differential pressure gauge. The system for monitoring the deformation of inflatable membrane buildings is connected to a data processing server. The three-dimensional acceleration sensor on the membrane surface, the wind pressure sensor on the membrane surface, and the high-precision GNSS displacement monitoring module on the membrane surface are connected to the cable net connecting angle plate by means of hexagon socket bolts and through gasket-type, cover-type, and magnetic adsorption-type connectors, and the cable net connecting angle plate is installed on the surface of the inflatable membrane building.

[0028] The wind load effect monitoring system includes wind pressure, wind speed and wind direction.

[0029] It also includes a cloud server, a cloud server and a data processing server. The data processing server is also connected to a data analysis processor. The cloud server is also connected to a field monitoring data acquisition subsystem. The field monitoring data acquisition subsystem is used to monitor multiple monitoring points on the construction site in real time to obtain monitoring data, and upload the monitoring data to the cloud server. The monitoring points are respectively a wind load monitoring system, a vibration monitoring system, a support reaction monitoring system, an anchor tension detection system, an air membrane internal environment detection system, and a system for monitoring the deformation of an inflatable membrane building. The data analysis processor is used to predict the monitoring data through an artificial neural network to generate predicted data, generate analysis data reports, store the data, and predict possible data changes.

[0030] The cloud server is also connected to the early warning and information release subsystem, which is used to remind staff members based on the early warning information sent by the cloud server. The early warning and information release subsystem is also used to inform staff members of the danger level.

[0031] The air film internal environment detection system includes sensors for detecting the internal environment and working parameters of the air film building, and the anchor cable tension detection system includes at least one magnetic flux sensor for obtaining the stress of the anchor cable of the air film building.

[0032] The specific reminder methods of the early warning and information release subsystem are: one or more of text messages, emails, broadcasts and display screens to remind staff.

[0033] The present invention can monitor the normal use performance and stress characteristics of the current air membrane building, that is, the present invention can utilize the characteristics of each branch monitoring system to realize the comprehensive performance monitoring of the air membrane building performance, which is conducive to the mastery and control of the building performance. The present invention can meet the current domestic and foreign demand for air membrane building monitoring, solve the problem of the lack of effective monitoring means for air membrane buildings, and effectively prevent the membrane collapse accidents caused by large-space inflatable membrane buildings in response to heavy snow weather. By monitoring the deformation, it can warn and notify relevant personnel in advance to eliminate the danger and avoid the occurrence of safety accidents. The technical problem that the existing constant pressure control strategy cannot effectively prevent the membrane top from collapsing under heavy snow load is solved, and it is convenient to monitor the data for a long time. The automatic collection and transmission of monitoring data is realized through the on-site monitoring data acquisition subsystem, and the early warning and real-time release of monitoring information is realized through the early warning and information release subsystem. The system provides a new way to establish an information platform for the management of large-scale urban foundation pit projects, greatly improving the automation and intelligence level of on-site information management, prediction and early warning, and thus also provides new reference and technical support for the safety monitoring and management during the construction of other similar large-scale projects.

[0034] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0035] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0036] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A foundation pit air film environment monitoring system, characterized in that: include: It includes a wind load effect monitoring system for obtaining wind speed around the air-membrane building and wind speed on the surface of the air-membrane building, a vibration monitoring system for obtaining vibration data of the air-membrane building, a support reaction force monitoring system for obtaining the force on the support of the air-membrane building, an anchor tension detection system for obtaining the anchor stress of the air-membrane building, an air membrane internal environment detection system, a system for monitoring the deformation of the inflatable membrane building, and a data processing server.

2. A foundation pit air film environment monitoring system as claimed in claim 1, characterized in that: The wind load monitoring system, vibration monitoring system, support reaction force monitoring system, anchor cable tension detection system, and air film internal environment detection system are all connected to the data processing server.

3. A foundation pit air film environment monitoring system as claimed in claim 2, characterized in that: The system for monitoring deformation of an inflatable membrane building includes a collection unit, an operation processing unit, a power supply unit and a remote monitoring unit. The collection unit is composed of a displacement sensor for collecting membrane deformation signals and a signal conversion module. The signal output end of the displacement sensor is connected to the input end of the signal conversion module. The signal conversion module converts the current signal of the displacement sensor into a corresponding digital signal and sends it to the operation module of the operation processing unit.

4. A foundation pit air film environment monitoring system as claimed in claim 2, characterized in that: The operation processing unit includes an operation module, a control module and a wireless data transceiver module. The operation module summarizes and processes the received digital signals to obtain the elongation of the inflatable membrane collected by the displacement sensor installed on the top of the air membrane at each collection time, and transmits the elongation to the control module. After receiving the elongation data, the control module performs a comprehensive operation on the received elongation data to obtain the horizontal displacement and vertical displacement of the inflatable membrane deformation at the top of the membrane, and sends the obtained horizontal displacement and vertical displacement of the inflatable membrane deformation to the remote monitoring unit through the wireless data transceiver module; after receiving the inflatable membrane deformation, the remote monitoring unit compares it with the inflatable membrane threshold pre-stored in the unit and stores it in the storage module at the same time. When the inflatable membrane deformation exceeds the set threshold, an early warning message is issued; the power supply unit is connected to the collection unit and the operation processing unit to provide power for them.

5. The foundation pit air film environment monitoring system according to claim 1, characterized in that: The system for monitoring the deformation of an inflatable membrane building also includes a three-dimensional acceleration sensor on the membrane surface, a wind pressure sensor on the membrane surface, a high-precision GNSS displacement monitoring module on the membrane surface, and an inflatable membrane differential pressure gauge. The system for monitoring the deformation of an inflatable membrane building is connected to the data processing server. The three-dimensional acceleration sensor on the membrane surface, the wind pressure sensor on the membrane surface, and the high-precision GNSS displacement monitoring module on the membrane surface are respectively connected to the cable net connection angle plate by means of hexagon socket bolts and through gasket-type, cover-type, and magnetic adsorption-type connectors. The cable net connection angle plate is installed on the surface of the inflatable membrane building.

6. A foundation pit air film environment monitoring system as claimed in claim 1, characterized in that: The wind load effect monitoring system includes wind pressure, wind speed and wind direction.

7. A foundation pit air film environment monitoring system as claimed in claim 1, characterized in that: It also includes a cloud server, the cloud server and the data processing server, the data processing server is also connected to a data analysis processor, the cloud server is also connected to a field monitoring data acquisition subsystem, the field monitoring data acquisition subsystem is used to monitor multiple monitoring points on the construction site in real time to obtain monitoring data, and upload the monitoring data to the cloud server, the monitoring points are respectively the wind load monitoring system, the vibration monitoring system, the support reaction monitoring system, the anchor tension detection system, the air membrane internal environment detection system and the inflatable membrane building deformation monitoring system, the data analysis processor is used to predict the monitoring data through an artificial neural network to generate the predicted data, generate an analysis data report, and store the data, while predicting possible data changes.

8. A foundation pit air film environment monitoring system as claimed in claim 7, characterized in that: The cloud server is also connected to an early warning and information release subsystem, which is used to remind staff members according to the early warning information sent by the cloud server. The early warning and information release subsystem is also used to prompt the staff members of the danger level.

9. The foundation pit air film environment monitoring system according to claim 1, characterized in that: The air membrane internal environment detection system includes sensors for detecting the internal environment and working parameters of the air membrane building, and the anchor cable tension detection system includes at least one magnetic flux sensor for obtaining the stress of the anchor cable of the air membrane building.

10. A foundation pit air film environment monitoring system as claimed in claim 8, characterized in that: The warning and information release subsystem reminder method is specifically: one or more of text messages, emails, broadcasts and display screens to remind the staff.

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