Wind-induced vibration observation system for mountainous area bridge

Abstract

A wind-induced vibration observation system for a mountainous area bridge belongs to a bridge wind-induced vibration observation system and comprises a wind speed monitoring system, a vibration monitoring system and a monitoring computer which are integrated with a storage and transmission module, the vibration monitoring system comprises an acceleration sensor, a collector, a controller and an industrial personal computer, the acceleration sensor is connected with the collector through a line, the collector is connected with the controller through a line, the controller is connected with the industrial personal computer through a line, and the industrial personal computer is connected with a monitoring computer through a remote wireless transmission system; the wind speed monitoring system integrated with the storage and transmission module comprises a wind speed monitoring system support and an anemograph, the anemograph is installed on the wind speed monitoring system support, and the anemograph is connected with a monitoring computer through a remote wireless transmission system. According to the utility model, data such as wind speed, wind direction, bridge vibration response and the like in the mountain bridge construction process can be continuously monitored, and effective reference is provided for the safety of the construction period.

Description

Technical Field

[0001] This utility model relates to a bridge wind-induced vibration monitoring system, specifically a wind-induced vibration monitoring system for bridges in mountainous areas. Background Technology

[0002] Bridges are vital structures spanning mountainous valleys. Mountain valleys are characterized by high instantaneous wind speeds and rapid changes in wind velocity, which can cause bridge vibrations and pose safety hazards during construction and operation.

[0003] Due to the frequent occurrence of wind-induced disasters and safety accidents, monitoring of bridge wind environment and wind-induced vibration has become an urgent need. Many institutions have developed bridge wind environment and wind-induced vibration monitoring systems. For example, Dai Xihua et al. invented a vision-enhanced real-time bridge vibration monitoring method, system, and device; Liang Ningyi et al. invented a bridge wind-induced response monitoring system; and Gao Donglai et al. invented a wind vibration monitoring and intelligent vibration reduction protection device for long-span bridges with separated three-box girder structures. These wind environment and vibration monitoring systems make practical contributions to bridge wind-induced vibration and control, either through new technologies or through active vibration control. However, existing technical solutions are often not suitable for high-pier bridges in mountainous areas. For example, vibration monitoring methods based on visual analysis require industrial cameras to be placed in the center of the bridge to ensure a field of view. However, it is often difficult to find suitable locations to place professional cameras in mountainous areas. In addition, the mountainous environment is relatively chaotic, and if the bridge is under construction, the deployed cameras and other equipment may be damaged by the construction. Furthermore, systems based on traditional sensors often do not take into account the difficulties in power supply and wired network construction, making them difficult to function when power supply and wired network construction are difficult in mountainous areas.

[0004] In summary, current wind speed observation data at bridge sites in mountainous areas is very limited, and continuous monitoring of wind speed, wind direction, and bridge vibration response during bridge construction is lacking. Therefore, there is an urgent need to develop a wind-induced vibration monitoring system for bridges in mountainous areas. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a wind-induced vibration observation system for bridges in mountainous areas, which can continuously monitor data such as wind speed, wind direction and bridge vibration response during the construction of bridges in mountainous areas, and provide effective reference for safety during the construction period.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a wind-induced vibration observation system for bridges in mountainous areas, including a wind speed monitoring system with an integrated storage and transmission module, a vibration monitoring system, and a monitoring computer;

[0007] The vibration monitoring system includes an acceleration sensor, a data acquisition unit, a controller, and an industrial computer. The acceleration sensor is connected to the data acquisition unit via a line, the data acquisition unit is connected to the controller via a line, the controller is connected to the industrial computer via a line, and the industrial computer is connected to the monitoring computer via a remote wireless transmission system.

[0008] The wind speed monitoring system with integrated storage and transmission module includes a wind speed monitoring system bracket and an anemometer. The anemometer is mounted on the wind speed monitoring system bracket and is connected to the monitoring computer via a remote wireless transmission system.

[0009] Furthermore, the acceleration sensor is a unidirectional sensor. In order to accurately collect the vertical and torsional vibration response of the main beam, the acceleration sensor is arranged at the ends of the flanges on both sides of the main beam, with one vertical and one horizontal acceleration sensor at each position.

[0010] Furthermore, the data acquisition device and industrial control computer are DH5971N distributed online monitoring and analysis systems.

[0011] Furthermore, the wind speed monitoring system of the integrated storage and transmission module is fixed near the outer side of the main beam's crash barrier.

[0012] Furthermore, the anemometer is a three-dimensional ultrasonic anemometer, including a data acquisition unit, a data storage card, and a wireless transmission module. The anemometer is used to collect wind speed and direction, and the data acquisition unit and data storage card are used to collect and store data. Finally, the data is connected to a monitoring computer via the wireless transmission module.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The wind speed and direction data acquisition utilizes an integrated storage and transmission module at the acquisition points for wind speed monitoring. Wind-induced vibration monitoring employs a field-integrated sensor, data logger, controller, industrial computer, and data transmission module. The integrated storage and transmission module effectively protects the anemometer from environmental influences during construction. The integrated design, incorporating solar cells, data storage, and wireless data transmission, is particularly convenient in mountainous environments. The field integration of the data logger, controller, industrial computer, and data transmission module avoids the reliance on a clean environment for visual vibration analysis, while wireless data transmission allows for use when wired networks are insufficient. The combined use of these two data sources reveals the coupling relationship between wind-induced vibration and wind speed and direction at the corresponding acquisition points, providing a valuable reference for construction safety and contributing to academic research on wind-induced vibration of bridges. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of a wind-induced vibration monitoring system for bridges in mountainous areas according to the present invention;

[0016] Figure 2 This is a schematic diagram illustrating the application of the wind-induced vibration monitoring system for bridges in mountainous areas according to this utility model.

[0017] Figure 3 This is a partial side view of an application of the present invention for a wind-induced vibration monitoring system for bridges in mountainous areas;

[0018] Explanation of the reference numerals in the figure:

[0019] 1. Wind speed monitoring system with integrated storage and transmission module; 2. Accelerometer; 3. Data logger; 4. Controller; 5. Industrial computer; 6. Remote wireless transmission system; 7. Monitoring computer; 8. Construction segment. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Reference Figures 1 to 3 A wind-induced vibration monitoring system for bridges in mountainous areas includes a wind speed monitoring system 1 with an integrated storage and transmission module, a vibration monitoring system, and a monitoring computer 7.

[0022] The vibration monitoring system includes an acceleration sensor 2, a data acquisition unit 3, a controller 4, and an industrial computer 5. The acceleration sensor 2 is connected to the data acquisition unit 3 via a line, the data acquisition unit 3 is connected to the controller 4 via a line, the controller 4 is connected to the industrial computer 5 via a line, and the industrial computer 5 is connected to the monitoring computer 7 via a remote wireless transmission system 6.

[0023] The wind speed monitoring system 1 with integrated storage and transmission module includes a wind speed monitoring system bracket and an anemometer. The anemometer is installed on the wind speed monitoring system bracket and is connected to the monitoring computer 7 through a remote wireless transmission system 6.

[0024] In this embodiment, the accelerometer 2 is a unidirectional sensor from Jiangsu Donghua Testing Technology Co., Ltd. To accurately collect the vertical and torsional vibration responses of the main beam, the accelerometer 2 is arranged at the ends of the flanges on both sides of the main beam, with one vertical and one horizontal accelerometer at each location. The data acquisition unit 3 and the industrial control computer 4 both belong to the DH5971N distributed online monitoring and analysis system of Jiangsu Donghua Testing Technology Co., Ltd. The data acquisition unit 3 can connect to multiple accelerometers 2, aggregating and transmitting the data collected by the accelerometers 2 to the controller 4. The controller 4 can aggregate the data from multiple data acquisition units 3 and modulate it before connecting it to the industrial control computer 5. The industrial control computer 5 is equipped with software configured by Jiangsu Donghua Testing Technology Co., Ltd., capable of recording and analyzing the collected data, and transmitting it to the monitoring computer 7 via a remote wireless transmission system 6. The monitoring computer 7 can be the monitoring computer of XX University.

[0025] In this embodiment, the wind speed monitoring system 1 with integrated storage and transmission module is fixed near the outer side of the main beam's crash barrier. The wind speed monitoring system bracket is used to keep the anemometer's data collection point slightly away from the beam and to protect it from construction interference. The cantilever support height of the wind speed monitoring system bracket is L=2.4m, the anemometer height is 0.6m, and the measuring point height is 3.0m. The anemometer is a three-dimensional ultrasonic anemometer, purchased from Beijing Huayun Xintong Technology Development Co., Ltd., and includes a data acquisition unit, a data storage card, and a wireless transmission module. The anemometer is used to collect wind speed and direction data, and the data acquisition unit and data storage card are used to collect and store data, which is finally connected to the monitoring computer 7 via the wireless transmission module.

[0026] In this embodiment, the sampling frequency of the three-dimensional ultrasonic anemometer is set to 10Hz, the data acquisition and transmission system is powered by a "solar panel + battery" method, and remote data download is performed through wireless transmission.

[0027] Working principle:

[0028] The wind speed monitoring system 1 with integrated storage and transmission modules consists of: a wind speed monitoring system support frame and an anemometer. The anemometer includes a data acquisition unit, a data storage card, and a wireless transmission module. The wind speed monitoring system support frame is used to position the anemometer's data acquisition points slightly away from the beam structure, protecting them from construction interference. The anemometer is used to collect wind speed and direction data. The data acquisition unit and data storage card are used to collect and store the data, which is finally connected to the monitoring computer at XX University via the wireless transmission module, i.e., the remote wireless transmission system 6.

[0029] To date, the wind speed monitoring system with integrated storage and transmission modules is operating well and can effectively collect local wind speed and direction data from locations slightly away from the beam that are not affected by construction.

[0030] After the data is transmitted to the monitoring computer at XX University, the wind speed and direction data will be comprehensively analyzed using MATLAB software. This software can quickly obtain the 30-second moving average wind speed distribution, wind rose diagram, and wind speed and direction before and after the maximum moving average wind speed within the required time range for the local wind environment. It can also obtain the time, magnitude, and direction of the daily maximum 30-second moving average wind speed, thus enabling a comprehensive understanding and analysis of changes in the local wind environment. For vibration monitoring data, the DHDAS dynamic signal acquisition and analysis system will be used for analysis. This software can obtain the velocity monitoring values ​​at any time within the acquisition time interval and analyze their frequency and amplitude. The data can then be exported as a TXT file for further processing. The combined use of these two types of data can reveal the coupling relationship between wind-induced vibration and wind speed and direction at corresponding bridge locations, providing a valuable reference for construction safety and contributing to academic research on wind-induced vibration of bridges.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wind-induced vibration observation system for mountainous bridges, characterized by: The wind speed monitoring system, the vibration monitoring system and the monitoring computer are integrated with a storage transmission module; The vibration monitoring system comprises an acceleration sensor, a collector, a controller and an industrial computer, the acceleration sensor is connected with the collector through a line, the collector is connected with the controller through a line, the controller is connected with the industrial computer through a line, and the industrial computer is connected with the monitoring computer through a remote wireless transmission system. The wind speed monitoring system integrated with the storage transmission module comprises a wind speed monitoring system support and a wind speed meter, the wind speed meter is installed on the wind speed monitoring system support, and the wind speed meter is connected with the monitoring computer through a remote wireless transmission system.

2. The system for mountainous bridge wind-induced vibration observation according to claim 1, characterized in that: The acceleration sensor is a one-way sensor, which is used to accurately collect the vertical and torsional vibration responses of the main beam, and is arranged at the end of the wing plate on both sides of the main beam, and one vertical and horizontal acceleration sensor is arranged at each position.

3. The system for mountainous bridge wind-induced vibration observation according to claim 1 or 2, characterized in that: The collector and the industrial computer are DH5971N distributed online monitoring and analysis systems.

4. The system for mountainous bridge wind-induced vibration observation according to claim 1 or 2, characterized in that: The wind speed monitoring system integrated with the storage transmission module is fixed near the anti-collision guardrail outside the main beam.

5. The system for mountain bridge wind-induced vibration observation according to claim 1 or 2, characterized in that: The wind speed meter is a three-dimensional ultrasonic wind speed meter, which comprises a data collector, a data storage card and a wireless transmission module.

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