An early warning and monitoring system for the safety of highway overpass billboards

Abstract

The utility model provides a safety early warning monitoring system for highway billboards, which relates to the technical field of transportation engineering and includes an inclinometer, a displacement meter, a strain gauge and an accelerometer. The inclinometer is installed in the direction where the overall overturning angle of the billboard steel frame is the largest, and is used to detect whether the steel frame tilts transversely to the bridge. The displacement meter is installed at the position where the relative displacement between the steel frame and the billboard installation position is the largest. One end of the displacement meter is fixed to the concrete guardrail, and the other end is in contact with the steel frame, and is used to detect the relative deformation amount transversely to the bridge between the steel frame and the bridge. The strain gauge is installed near the trusses at both ends of the billboard and is fixed on the steel rod with the largest axial stress inside the steel frame, and is used to detect the stress condition of the steel frame. The accelerometer is installed on the steel rod of the steel frame and is used to detect the transverse vibration frequency of the steel frame. The above system helps to accurately early warn the risk state of highway billboards.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation engineering, and in particular to a safety early warning monitoring system for billboards on a highway overpass. Background Art

[0002] With the continuous growth and steady development of the expressway mileage in our province, the volume of expressways is increasing day by day. Due to the characteristics of expressways such as long lines, high speeds, and large traffic, the distribution of billboards along the lines is relatively scattered and difficult to centrally manage. This scattered distribution makes the safety maintenance and monitoring of billboards particularly complicated and difficult. Once a billboard has structural looseness, tilt or other safety hazards, it is very easy to cause serious traffic accidents, threatening driving safety and the safety of public life and property. Therefore, in order to effectively prevent various safety accidents caused by billboard failures and ensure the safety and smoothness of the public transportation environment, it is particularly necessary to establish a set of efficient billboard safety early warning monitoring devices.

[0003] In the existing technology, sensors and monitoring equipment are connected to achieve remote real-time monitoring and data transmission of billboards, so as to timely discover and deal with potential safety hazards. However, there are still some shortcomings, such as: the lack of comprehensive sensor types makes the monitoring system unable to cover all potential risk points; the inaccurate sensor installation position may lead to monitoring blind spots in key parts and fail to fully capture the true status of billboards. Therefore, how to improve the accuracy of billboard safety warning monitoring is imminent. Utility Model Content

[0004] The utility model provides a safety early warning monitoring system for billboards on highway overpasses. The system helps to accurately and efficiently early warning the risk status of billboards on highways.

[0005] The utility model provides a highway overpass billboard safety early warning monitoring system, including an inclinometer, a displacement meter, a strain gauge and an accelerometer;

[0006] The inclinometer is installed in the direction causing the maximum overturning angle of the overall billboard steel frame, and is used to detect whether the steel frame is tilted in the transverse direction of the bridge;

[0007] The displacement meter is installed at the position where the relative displacement between the steel frame and the billboard installation position is the largest, one end of which is fixed to the concrete guardrail and the other end is in contact with the steel frame, and is used to detect the relative deformation between the steel frame and the bridge in the transverse direction of the bridge;

[0008] The strain gauge is installed near the trusses at both ends of the billboard and fixed on the steel rod with the largest axial stress inside the steel frame to detect the stress condition of the steel frame;

[0009] The accelerometer is installed on the steel frame steel pole and is used to detect the transverse vibration frequency of the steel frame.

[0010] Preferably, it also includes a video monitoring module for monitoring the overall status of the billboard and human damage.

[0011] Preferably, the video surveillance module is 2 cameras, which are installed on the outside of the concrete guardrail at the bridge head and arranged along the diagonal of the bridge plane, and the cameras are higher than the billboards.

[0012] Preferably, it also includes:

[0013] The monitoring cloud network platform system is used to store the positioning information of billboards on each highway overpass.

[0014] Preferably, it also includes: a power supply module, which is composed of solar power supply and other power supply equipment.

[0015] Preferably, it also includes: a data acquisition module, which is used for collecting and transmitting monitoring data information.

[0016] Compared with the prior art, the utility model sets various sensors at preset positions to monitor multiple safety data of billboards in real time, obtains comprehensive and accurate real-time data on the safety status of billboards, and realizes efficient early warning of risk status of billboards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the sensor layout scheme.

[0018] Figure 2 This is a schematic diagram of the layout of the billboard safety early warning monitoring system. DETAILED DESCRIPTION

[0019] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific implementation disclosed below.

[0020] The utility model provides a safety early warning monitoring system for billboards on highway overpasses. Figure 1 - Figure 2 The system provided by the utility model is described in detail.

[0021] The safety status of existing billboards during operation and management includes: changes in the billboard's own structural state, changes in the billboard's overall state caused by environmental impacts (mainly wind loads), and changes in the billboard's safety state caused by human factors. Among them, the safety evaluation indicators are as follows:

[0022] Stress at the most unfavorable position of the steel frame: The stress at the most unfavorable position of the steel frame indicates the stress and strain generated by the billboard steel structure under its own weight, wind load or other environmental conditions. Large changes in values ​​indicate to a certain extent that the structure of the billboard itself is unstable and there is a risk of damage or falling.

[0023] Relative displacement between the billboard and the bridge side railing: The relative displacement between the corresponding position of the billboard and the bridge side railing indicates the displacement of the billboard relative to the bridge body under wind load or other environmental conditions. A large change in the value may to some extent foreshadow the falling of the billboard.

[0024] The inclination angle of the billboard itself relative to the bridge side railing: It indicates the relative inclination degree of the billboard steel structure itself and the bridge side railing under its own weight, wind load or other environmental conditions. Compared with the displacement, the change of this value can strongly indicate the stability problem of the steel structure itself and the risk of falling.

[0025] The vertical acceleration of the billboard steel structure itself: it can reflect the amplitude of the structure itself under wind load or other environmental conditions, and the change in value can foreshadow the change in the stiffness of the structure itself. When the stiffness is degraded, it will seriously affect the structural stability of the structure itself, and then create a risk of falling.

[0026] Other abnormal behaviors in video surveillance: Abnormalities observed in video surveillance are usually the result of the interaction of the above indicators. However, if abnormalities of the billboard can be captured through video surveillance, it usually indicates that the problem of the billboard is relatively serious and urgently needs manual inspection or even maintenance and replacement.

[0027] Wind speed: The monitoring indicators of Class I billboards include wind speed indicators. Because of its high importance, the most important condition affecting the stability of billboards in environmental conditions is the wind load generated by the wind. The load generated by a large wind speed is enough to make the billboard vibrate violently, which in turn leads to drastic changes in the above indicators (position, stress, inclination, acceleration value), causing the billboard to fall or be damaged.

[0028] Therefore, the utility model discloses a highway overpass billboard safety early warning monitoring system, including an inclinometer, a displacement meter, a strain gauge and an accelerometer;

[0029] The inclinometer is installed in the direction causing the maximum overturning angle of the overall billboard steel frame, and is used to detect whether the steel frame is tilted in the transverse direction of the bridge;

[0030] The displacement meter is installed at the position where the relative displacement between the steel frame and the billboard installation position is the largest, one end of which is fixed to the concrete guardrail and the other end is in contact with the steel frame, and is used to detect the relative deformation between the steel frame and the bridge in the transverse direction of the bridge;

[0031] The strain gauge is installed near the trusses at both ends of the billboard and fixed on the steel rod with the largest axial stress inside the steel frame to detect the stress condition of the steel frame;

[0032] The accelerometer is installed on the steel frame steel pole and is used to detect the transverse vibration frequency of the steel frame.

[0033] The preset installation position of the inclinometer is the direction that causes the maximum overturning angle of the entire billboard steel frame. Figure 1 , which is a schematic diagram of the sensor arrangement scheme. When the entire steel frame overturns along the x direction and reaches the alarm threshold, it is considered that the inclinometer 1 has a risk of falling.

[0034] The preset position of the displacement meter is the point where the relative displacement between the steel frame and the billboard installation position is the largest. Figure 1 , displacement meter 2 is installed at the point where the relative displacement between the structure and the bridge body is the largest after the load is applied. When the steel frame structure is damaged and causes displacement, when the relative displacement reaches the alarm threshold, it is considered to have a risk of falling.

[0035] The preset position for installing the strain gauge is on the steel rod with the largest axial stress inside the steel frame structure. Figure 1 ,When the internal axial force reaches the maximum value, the strain reaches the peak value at the same time, and it is considered that the strain gauge 3 is at risk of damage.

[0036] The highway overpass billboard safety early warning monitoring system provided by the utility model further comprises: video monitoring for monitoring the overall state of the billboard and the situation of human damage.

[0037] The preset position for the video surveillance installation is to arrange two video surveillance cameras outside the concrete guardrail at the bridge head, arranged along the diagonal of the bridge plane, and the cameras are higher than the top of the billboard.

[0038] The highway overpass billboard safety early warning monitoring system provided by the utility model further comprises: a video monitoring module for monitoring the overall state of the billboard and human damage.

[0039] The video monitoring module is composed of two cameras, which are installed on the outside of the concrete guardrail at the bridge head and arranged along the diagonal of the bridge plane. The cameras are higher than the billboards.

[0040] The highway overpass billboard safety early warning monitoring system provided by the utility model also includes: a monitoring cloud network platform system, which is used to store the positioning information of each highway overpass billboard.

[0041] The highway overpass billboard safety early warning monitoring system provided by the utility model further comprises: a power supply module, which is composed of solar power supply and other power supply equipment.

[0042] The highway overpass billboard safety early warning monitoring system provided by the utility model further comprises: a data acquisition module, which is used for the acquisition and transmission of monitoring data information.

[0043] Please see Figure 2 ,This figure is a schematic diagram of the layout of the billboard safety early warning monitoring system.

[0044] In order to effectively monitor the safety status of the billboard structure and on-site conditions, various sensors, power modules, and data acquisition modules are planned to be arranged according to the following plan. The billboard steel frame 5 is connected to the concrete guardrail 6. The video monitoring module consists of two cameras installed on the outside of the concrete guardrail 6 at the bridge head and arranged along the diagonal of the bridge plane. The camera 8 is about 1m higher than the top of the billboard to ensure that the billboard support structure and the advertising curtain can be monitored at the same time. The data acquisition module 7 is installed in a corner of the billboard steel frame. Figure 1 , strain gauge 3 monitors the stress of the steel frame supporting the billboard. Select the trusses close to the two ends of the billboard, and fix the strain gauges on the rods with greater stress according to the force analysis results. Displacement meter 2 monitors the relative deformation between the billboard steel structure support and the bridge in the transverse direction (y direction) to prevent the bolts fixing the billboard from loosening or pulling out. One end of the displacement meter is fixed to the concrete guardrail, and the other end is in contact with the steel support. Inclinometer 1 monitors whether the billboard steel frame is tilted in the transverse direction (along the yz plane). The accelerometer monitors the vibration frequency of the billboard support in the transverse direction (y direction). If the support is structurally damaged, the vibration frequency will change. The structural status can be judged by monitoring the frequency.

[0045] The configuration of each sensor used in this utility model meets high standards. The technical indicators and corresponding scores below are specifically scored according to the range of variation of their parameter values. The specific parameters are as follows:

[0046]

[0047]

[0048] The billboard monitoring indicators are set as follows:

[0049]

[0050] According to the above monitoring indicators, corresponding technical indicators are set, specifically, the deduction rules are set: for structural status monitoring, the displacement meter is divided into red and yellow grades according to the degree of abnormality. If a yellow displacement warning occurs, 5 points will be deducted, and a red warning will be deducted 10 points. If a yellow displacement warning occurs, 5 points will be deducted, and a red warning will be deducted 10 points. The strain gauge is divided into red and yellow grades according to the strain size. If a yellow strain warning occurs, 5 points will be deducted, and a red warning will be deducted 10 points. The inclinometer is divided into red and yellow grades according to the strain size. If a yellow inclination warning occurs, 5 points will be deducted, and a red warning will be deducted 10 points. According to the amplitude frequency, the overall stiffness state of the structure is evaluated and divided into two grades, with a deduction of 10 points for the first grade and 15 points for the second grade. Among human factors, according to the state of human damage based on video surveillance, the site is immediately protected.

[0051] Compare the monitoring data with the technical indicators and obtain the total score of billboard safety according to the deduction rules. The total score evaluation system is as follows:

[0052]

[0053]

[0054] Among them, highway billboards with different total scores correspond to different warning contents and handling measures.

[0055] Of course, the technical indicators correspond to the corresponding monitoring sensors, and the deduction rules and warning contents only provide a possible implementation method. Of course, the monitoring and detection data of the billboard can also be deformed in other forms - as long as the deformation is predetermined. The specific possible method will not affect the evaluation of the creativity of the utility model.

[0056] It is worth noting that the billboard safety warning monitoring system provided by the utility model can be used not only on overpasses, but also can be installed and used in the following locations: on the side of highways, near overpasses and viaducts, toll station areas, service areas and rest areas, tunnel entrances and exits, transportation hubs and main road intersections, next to bridges, etc.

[0057] The specific location of highway billboards is saved in the traffic media intelligent monitoring cloud network platform system. The specific location of the billboards monitored by the system has been saved during the geological survey period. After the sensors and on-site terminals are installed, they are linked to the media early warning monitoring system and GPS is used to specifically locate the billboards.

[0058] Although the utility model is disclosed as above in the preferred embodiment, it is not intended to limit the utility model. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be based on the scope defined by the claims of the utility model.

Claims

1. A highway overpass billboard safety early warning monitoring system, characterized in that: Includes inclinometers, displacement meters, strain gauges and accelerometers; The inclinometer is installed in the direction causing the maximum overturning angle of the overall billboard steel frame, and is used to detect whether the steel frame is tilted in the transverse direction of the bridge; The displacement meter is installed at the position where the relative displacement between the steel frame and the billboard installation position is the largest, one end of which is fixed to the concrete guardrail and the other end is in contact with the steel frame, and is used to detect the relative deformation between the steel frame and the bridge in the transverse direction of the bridge; The strain gauge is installed near the trusses at both ends of the billboard and fixed on the steel rod with the largest axial stress inside the steel frame to detect the stress condition of the steel frame; The accelerometer is installed on the steel frame steel pole and is used to detect the transverse vibration frequency of the steel frame.

2. The highway overpass billboard safety early warning monitoring system according to claim 1 is characterized in that: It also includes a video surveillance module for monitoring the overall status of the billboard and any human damage.

3. The highway overpass billboard safety early warning monitoring system according to claim 2 is characterized in that: The video monitoring module is composed of two cameras, which are installed on the outside of the concrete guardrail at the bridge head and arranged along the diagonal of the bridge plane. The cameras are higher than the billboards.

4. The highway overpass billboard safety early warning monitoring system according to claim 1 is characterized in that: Also includes: The monitoring cloud network platform system is used to store the positioning information of billboards on each highway overpass.

5. The highway overpass billboard safety early warning monitoring system according to claim 1 is characterized in that: Also includes: A power module, wherein the power module includes a solar power supply device.

6. The highway overpass billboard safety early warning monitoring system according to claim 1 is characterized in that: Also includes: Data acquisition module, used for collecting and transmitting monitoring data information.

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