Device for installing GNSS antenna for bridge deformation monitoring

Abstract

The utility model discloses a device for bridge deformation monitoring and GNSS antenna installation, which relates to the field of GNSS antenna installation equipment and comprises a bridge fixing assembly, a GNSS connecting piece and a GNSS antenna connector connecting piece. A bridge fixing assembly is arranged at one end of the GNSS connecting piece, a GNSS antenna connector connecting piece is mounted at the other end of the GNSS connecting piece, the bridge fixing assembly comprises a plurality of fixing plates, mounting holes are formed in the fixing plates, the included angle formed by the joint of each fixing plate and the GNSS connecting piece is 90 degrees, the GNSS connecting piece and the GNSS antenna connector connecting piece are integrally formed, and the mounting holes are formed in the mounting holes. And the bridge fixing assembly is welded on the GNSS connecting piece. The problem that a traditional split type structure is complex in connection can be solved.

Description

A device for installing a GNSS antenna for bridge deformation monitoring Technical Field

[0001] This utility model relates to the field of GNSS (Global Navigation Satellite System) antenna installation equipment, specifically to a device for installing GNSS antennas for bridge deformation monitoring. Background Technology

[0002] As railway bridges age, environmental erosion, train loads, and geological changes cause structural deformation, threatening operational safety. High-precision deformation monitoring technology based on GNSS, by capturing millimeter-level displacement changes in real time, has become a core means of assessing the health of bridge structures. Currently, conventional GNSS monitoring devices are mostly installed on the top of bridge retaining walls or fixed bases around railway lines. Their structural design and installation methods have significant flaws. Traditional split-type structures are complex, consisting of multiple components such as antenna supports, base plates, and anchor bolts, requiring on-site leveling and tightening layer by layer. This results in low installation efficiency and is prone to axial misalignment due to human error, affecting phase center stability. Therefore, there is an urgent need for a highly integrated, rapidly installable, and environmentally robust GNSS antenna mounting device to improve the reliability and economy of bridge monitoring systems. Summary of the Invention

[0003] The purpose of this invention is to provide a device for installing GNSS antennas for bridge deformation monitoring, so as to solve the problem of complex connection of traditional split structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, a device for installing a GNSS antenna for bridge deformation monitoring includes: a bridge fixing assembly, a GNSS connector, and a GNSS antenna connector.

[0006] One end of the GNSS connector is equipped with a bridge fixing component, and the other end is equipped with a GNSS antenna connector. The bridge fixing component includes several fixing plates with mounting holes. The angle formed by the connection between each fixing plate and the GNSS connector is 90 degrees. The GNSS connector and the GNSS antenna connector are integrally formed. The bridge fixing component is welded onto the GNSS connector. The GNSS connector is an L-shaped tube.

[0007] In some embodiments, the fixing plate is provided with magnetic expansion bolts, and the head of the magnetic expansion bolts is provided with magnetic engagement grooves. In use, the magnetic expansion bolts are installed in the mounting holes and positioned on the bridge railing cover plate with the assistance of the magnetic engagement grooves.

[0008] In some embodiments, the end of the magnetic expansion bolt is tapered.

[0009] In some embodiments, the GNSS antenna connector includes a spring steel sheet layer and a silicone damping layer, wherein the silicone damping layer is disposed on the periphery of the spring steel sheet layer. In use, the GNSS antenna connector is used to install and match the GNSS antenna connector through the spring steel sheet layer and the silicone damping layer.

[0010] In some embodiments, three fixing plates are provided, with two fixing plates symmetrically arranged at the ends of the GNSS connector, and the installation direction of the remaining fixing plate is perpendicular to the installation direction of the other two fixing plates.

[0011] In some implementations, the bridge fixing components are made of aluminum alloy or stainless steel.

[0012] In some implementations, the GNSS connector is made of aluminum alloy or stainless steel.

[0013] In some implementations, the GNSS antenna connector is made of aluminum alloy or stainless steel.

[0014] In some embodiments, the mounting hole is located at the center of the fixing plate.

[0015] In some implementations, a bridge railing cover or a sound shield is also included, with one end of the GNSS connector mounted on the bridge railing cover or sound shield via a bridge fixing assembly.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model integrates the GNSS connector and the GNSS antenna connector into one piece, eliminating the bolt connection gaps of traditional split components, reducing installation steps and time, while improving overall bending stiffness. The 90° angle between the fixing plate and the GNSS connector ensures that the installation axis is perpendicular, avoiding manual leveling errors and improving phase center stability.

[0018] Furthermore, the magnetic expansion bolts adhere to the bridge railing cover surface via magnetic grooves on their heads, enabling rapid pre-positioning. The tapered ends of the magnetic expansion bolts enhance the consistency of anchorage depth, reducing the risk of cracking when installed on bridge railing covers or sound barrier covers.

[0019] Furthermore, two of the fixing plates are symmetrically arranged at the ends of the GNSS connector, and the installation direction of the remaining fixing plate is perpendicular to the installation direction of the other two fixing plates. The three fixing plates form a spatial triangular support, which enhances the anti-overturning moment and adapts to the complex vibration environment of railway bridges.

[0020] Furthermore, the spring steel sheet layer and the silicone damping layer work together to reduce low-frequency and high-frequency vibrations, ensuring the integrity of the GNSS signal.

[0021] Furthermore, the bridge fixing components are made of aluminum alloy or stainless steel, the GNSS connectors are made of aluminum alloy or stainless steel, and the GNSS antenna connectors are made of aluminum alloy or stainless steel, which can prevent corrosion and deformation and improve the service life of the device.

[0022] Furthermore, one end of the GNSS connector is installed on the bridge railing or sound shield via a bridge fixing component. Its installation is less restricted, which can effectively reduce the time cost of bridge monitoring projects. It can also directly reflect bridge deformation through the bridge railing or sound shield, enabling more accurate analysis of the relationship between deformation values ​​and deformation factors. The installation location is not affected by railway operation, reducing the maintenance cost of bridge monitoring projects. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the overall structure of a device for installing a GNSS antenna for bridge deformation monitoring provided in the embodiment;

[0024] Figure 2 is a front view of a device for installing a GNSS antenna for bridge deformation monitoring provided in the embodiment;

[0025] Figure 3 is a top view of a device for installing a GNSS antenna for bridge deformation monitoring provided in the embodiment;

[0026] Figure 4 is a side view of a device for installing a GNSS antenna for bridge deformation monitoring provided in the embodiment;

[0027] Figure 5 is a statistical curve of the cumulative settlement of the bridge monitoring points after the installation of the GNSS antenna in a device for bridge deformation monitoring provided in the embodiment.

[0028] In the diagram, 1 is the bridge fixing component; 2 is the GNSS connector; and 3 is the GNSS antenna connector. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. The described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0034] Because railway bridges deform under environmental and other factors during operation, bridge structural deformation monitoring is a crucial component of structural monitoring and testing. It provides key information on the integrity and condition of the bridge structure, and GNSS-based bridge monitoring is an important high-precision deformation monitoring technology. Conventional GNSS monitoring devices are installed on top of the bridge retaining wall or other locations on the railway line. This method has several drawbacks: installation on the railway line is time-limited, only possible during railway operation "windows"; installation on the railway line significantly impacts measurement accuracy; the installation location is not at a key bridge point, resulting in inaccurate measurement results reflecting bridge deformation values; and equipment maintenance is inconvenient, also only possible during railway operation "windows."

[0035] Therefore, as shown in Figures 1 to 4, this embodiment provides a device for installing a GNSS antenna for bridge deformation monitoring. The antenna is installed at the position of the bridge railing shield or sound shield, which can effectively avoid the above-mentioned problems and improve the accuracy of GNSS data calculation through the optimized calculation method.

[0036] A device for installing a GNSS antenna for bridge deformation monitoring includes: a bridge fixing component 1, a GNSS connector 2, and a GNSS antenna connector 3;

[0037] One end of the GNSS connector 2 is provided with a bridge fixing component 1, and the other end is installed with a GNSS antenna connector 3. The bridge fixing component 1 includes several fixing plates, and the fixing plates are provided with mounting holes. The included angle formed by the connection between each fixing plate and the GNSS connector 2 is 90 degrees. The GNSS connector 2 and the GNSS antenna connector 3 are integrally formed. The bridge fixing component 1 is welded to the GNSS connector 2, and the mounting holes are located in the center of the fixing plates.

[0038] A magnetic expansion bolt is provided on the fixing plate. The head of the magnetic expansion bolt is provided with a magnetic engagement groove. In use, the magnetic expansion bolt is installed in the mounting hole and positioned on the bridge railing cover plate with the assistance of the magnetic engagement groove. The end of the magnetic expansion bolt is tapered. The magnetic expansion bolt is made of M12 stainless steel and integrates a magnetic auxiliary positioning device.

[0039] The GNSS antenna connector 3 includes a spring steel sheet layer and a silicone damping layer. The silicone damping layer is disposed on the periphery of the spring steel sheet layer. In use, the GNSS antenna connector 3 is used to install and match the GNSS antenna connector through the spring steel sheet layer and the silicone damping layer.

[0040] Three fixing plates are provided, two of which are symmetrically arranged at the ends of the GNSS connector 2, and the installation direction of the remaining fixing plate is perpendicular to the installation direction of the other two fixing plates.

[0041] The bridge fixing component 1, GNSS connector 2, and GNSS antenna connector 3 are all made of high-strength, corrosion-resistant, and deformation-resistant metal materials. The bridge fixing component 1 is made of aluminum alloy or stainless steel. The entire device is fixed to the bridge railing cover or sound shield cover by using magnetic expansion bolts.

[0042] The GNSS connector 2 is made of aluminum alloy or stainless steel and is an L-shaped tube, which makes the GNSS antenna face the vertical direction.

[0043] The GNSS antenna connector 3 is made of aluminum alloy or stainless steel and is mainly used to fix the GNSS antenna.

[0044] As shown in Figure 5, in a long-term automated settlement monitoring project for a high-speed railway bridge in China, the device of this invention was used to install a GNSS antenna on the side of the bridge's shielding plate, and an optimized solution method was employed to meet the project's requirements. Furthermore, compared to traditional installation and maintenance methods, the device of this embodiment significantly reduces equipment installation and maintenance costs, and the collected data is stable and reliable, meeting the project's requirements.

[0045] This embodiment allows for less time constraint when installing the device on bridge railing or sound barrier panels, effectively reducing the "time cost" of bridge monitoring projects. The installation location is less affected by trains, and the improved algorithm effectively enhances the accuracy of GNSS data processing and significantly improves the stability of monitored variables. The installation location directly reflects bridge deformation, making the analysis of the relationship between deformation values ​​and deformation factors more accurate. Furthermore, the installation location minimizes the impact of railway operation on the maintenance of the GNSS antenna, greatly reducing the "maintenance cost" of bridge monitoring projects.

[0046] Therefore, the device provided in this embodiment also has the following advantages:

[0047] (1) The GNSS connector 2 and the GNSS antenna connector 3 are integrally formed, and the bridge fixing component 1 is welded on the GNSS connector 2. Compared with the traditional split structure, 17 connection nodes are reduced, the overall rigidity is increased by 42%, and the assembly error of multiple parts can be effectively eliminated.

[0048] (2) The GNSS connector 2 is an L-shaped tube, which reduces the weight by 35% while maintaining vertical orientation accuracy;

[0049] (3) The bridge fixing component 1 includes several fixing plates, on which magnetic expansion bolts are provided. The heads of the magnetic expansion bolts are provided with magnetic engagement grooves. In use, the magnetic expansion bolts are installed in the mounting holes and positioned on the bridge railing cover plate with the assistance of the magnetic engagement grooves. It can achieve rapid installation and positioning on the surface of the cover plate with a thickness of 0~300mm, shortening the installation time by 68% compared with the traditional method, and meeting the stability requirements under wind pressure of 300km / h when the train passes.

[0050] (4) The GNSS antenna connector 3 includes a spring steel sheet layer and a silicone damping layer. The silicone damping layer is located on the periphery of the spring steel sheet layer. In use, the GNSS antenna connector 3 is used to install and match the GNSS antenna connector through the spring steel sheet layer and the silicone damping layer. It is compatible with 23 GNSS antenna models from 8 major brands such as Trimble and Leica. Through the double-layer buffer design of spring steel sheet + silicone damping, the coaxiality error of antenna installation is reduced to <0.05°, and the data packet loss rate is reduced to 0.3% under vibration environment.

[0051] (5) The geometric parameters of the device provided in this embodiment are deeply embedded in the GNSS calculation model. The baseline error caused by non-standard installation is eliminated by the three-dimensional coordinate compensation algorithm of the installation position. The measured data shows that the accuracy of the elevation direction calculation can be improved to ±0.8mm and the plane accuracy to ±0.5mm (3σ), which is more than 60% higher than the accuracy of the traditional installation method.

[0052] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All changes within the scope of this utility model or equivalent to this utility model are included in this utility model.

Claims

1. A device for installing a GNSS antenna for bridge deformation monitoring, characterized in that, include: Bridge fixing component (1), GNSS connector (2) and GNSS antenna connector (3); one end of the GNSS connector (2) is provided with the bridge fixing component (1), and the other end is installed with the GNSS antenna connector (3). The bridge fixing component (1) includes several fixing plates, and the fixing plates are provided with mounting holes. The angle formed by the connection between each fixing plate and the GNSS connector (2) is 90 degrees. The GNSS connector (2) and the GNSS antenna connector (3) are integrally formed. The bridge fixing component (1) is welded to the GNSS connector (2). The GNSS connector (2) is an L-shaped tube.

2. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, The fixing plate is provided with magnetic expansion bolts, and the head of the magnetic expansion bolts is provided with magnetic engagement grooves. In use, the magnetic expansion bolts are installed in the mounting holes and positioned on the bridge railing cover plate with the assistance of the magnetic engagement grooves.

3. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 2, characterized in that, The end of the magnetic expansion bolt is tapered.

4. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, The GNSS antenna connector (3) includes a spring steel sheet layer and a silicone damping layer. The silicone damping layer is disposed on the periphery of the spring steel sheet layer. In use, the GNSS antenna connector (3) is used to install and match the GNSS antenna connector through the spring steel sheet layer and the silicone damping layer.

5. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, Three fixing plates are provided, two of which are symmetrically arranged at the ends of the GNSS connector (2), and the installation direction of the remaining fixing plate is perpendicular to the installation direction of the other two fixing plates.

6. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 4, characterized in that, The bridge fixing component (1) is made of aluminum alloy or stainless steel.

7. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, The GNSS connector (2) is made of aluminum alloy or stainless steel.

8. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, The material of the GNSS antenna connector (3) is aluminum alloy or stainless steel.

9. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, The mounting hole is located at the center of the fixing plate.

10. The device for installing a GNSS antenna for bridge deformation monitoring according to claim 1, characterized in that, It also includes bridge railing shields or sound shields, with one end of the GNSS connector (2) mounted on the bridge railing shield or sound shield via the bridge fixing assembly (1).

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