Inertia type main beam transverse dynamic deflection measuring device based on liquid buoyancy and damping

Abstract

The utility model discloses an inertia type main beam transverse dynamic deflection measuring device based on liquid buoyancy and damping. The inertia type main beam transverse dynamic deflection measuring device comprises a hollow first shell, a spring, a mass block, a liquid medium and a displacement meter. The mass block is arranged in the middle in the first shell in a suspended mode, the centers of the two side faces, transversely perpendicular to the main beam, of the mass block are both connected with springs, the other ends of the springs are fixed to the inner wall of the first shell, a through hole is formed in the first shell, and the displacement meter is installed on the outer side of the first shell. The testing end of the displacement meter measures the relative displacement of the mass block and the first shell through the through hole, and the first shell is filled with a liquid medium. The device can be rapidly and conveniently installed in the transverse direction of a bridge, and can accurately measure the transverse dynamic deflection of the bridge.

Description

Technical Field

[0001] The utility model relates to the field of bridge lateral dynamic deflection measurement. More specifically, the utility model relates to an inertial main girder lateral dynamic deflection measurement device based on liquid buoyancy and damping. Background Technique

[0002] The lateral dynamic deflection of the beam body is the most intuitive parameter to characterize its lateral vibration characteristics. How to accurately and efficiently obtain this deflection value has important engineering significance. Existing measurement methods mainly include: (1) The Beidou system and GPS are mainly applicable to the measurement of the lateral displacement of the main girder of extra-large vehicle bridges; (2) For medium and small span bridges, especially pedestrian bridges, the acceleration method, the graphical method or the dial displacement meter method are generally used to measure the lateral displacement of the main girder. The measurement accuracy of existing technologies has nothing to do with the size of the main girder deflection value. Among them, (1) the accuracy of satellite-based measurement technology mainly depends on the number of satellites passing overhead at the same time and whether there is occlusion; (2) for the rest of the methods, after the equipment is produced, the accuracy is a fixed value; neither can adapt to the different accuracy requirements of large displacement values and small displacement values. In addition, in recent years, a variety of methods have emerged that can be extended to measure the lateral deflection of the main girder, but there are some deficiencies. For example, (1) the image acquisition equipment used in the graphical method is difficult to adapt to the adverse effects brought by environments such as rain, snow, fog, and foundation vibration, and it is difficult to effectively solve the stability of the equipment performance and the safety protection problem of the equipment itself during long-term monitoring; (2) The microwave radar method is still in the research stage, with limited practical value and expensive equipment, and it is difficult to determine the fixed reference points for the measurement of the lateral dynamic deflection of the main girder of bridges spanning rivers and valleys.

[0003] Therefore, providing a new method and device for measuring the lateral dynamic deflection of bridges to solve the problem of accurate and rapid measurement of the lateral dynamic deflection of the beam body and providing basic data support for the safe operation and maintenance of bridges has important engineering significance and economic and social value. Content of the Utility Model

[0004] The purpose of the utility model is to provide an inertial main girder lateral dynamic deflection measurement device based on liquid buoyancy and damping, which can be quickly and conveniently installed on the bridge laterally and accurately measure the lateral dynamic deflection of the bridge.

[0005] The technical solution adopted by the utility model to solve this technical problem is: an inertial main girder lateral dynamic deflection measurement device based on liquid buoyancy and damping, including a hollow first shell, a spring, a mass block, a liquid medium and a displacement meter;

[0006] The mass block is suspended in the middle of the first housing. Springs are connected to the centers of the two sides of the mass block that are horizontally perpendicular to the main beam. The other ends of the springs are fixed to the inner wall of the first housing. A through hole is provided on the first housing, and a displacement gauge is installed outside the first housing. The test end of the displacement gauge measures the relative displacement between the mass block and the first housing through the through hole. A transparent baffle is provided at the through hole. The first housing is filled with a liquid medium, and the buoyancy provided by the liquid medium is the same as the total gravity of the mass block.

[0007] As a further solution of the present invention: the mass block is a cubic hollow structure.

[0008] As a further solution of the present invention: it further includes a power supply component and a data transmission module; the power supply component is electrically connected to the displacement gauge and continuously supplies power to the displacement gauge, and the data transmission module is electrically connected to the displacement gauge and saves and transmits the measurement data;

[0009] The power supply component, the data transmission module, and the displacement gauge are located on the same side of the first housing, and a second housing is provided outside the first housing. The power supply component, the data transmission module, and the displacement gauge are located inside the second housing.

[0010] The present invention has at least the following beneficial effects: the present invention converts the lateral dynamic deflection of the bridge into the relative displacement between the mass block and the housing in the device, which is more convenient for direct and accurate measurement.

[0011] Other advantages, objectives, and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the inertial type main beam lateral dynamic deflection measuring device based on liquid buoyancy and damping of the present invention.

[0013] Wherein, 1 - first housing, 2 - spring, 3 - mass block, 4 - displacement gauge, 5 - power supply component, 6 - data transmission module, 7 - liquid medium, 8 - second housing. Detailed Embodiment

[0014] The present invention will be described in detail and completely below with reference to the drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the drawings, it should be particularly noted that: the technical solutions and technical features provided in each part including the following description of the present invention can be combined with each other without conflict.

[0015] In addition, the embodiments of the present utility model involved in the following description are generally only a part of the embodiments of the present utility model, rather than all embodiments. Therefore, all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] The following further elaborates on the present utility model in detail in conjunction with the accompanying drawings and embodiments, and the specific implementation process is as follows:

[0017] As Figure 1 shown, the present utility model provides an inertial main beam lateral dynamic deflection measurement device based on liquid buoyancy and damping, including a hollow first housing 1, a spring 2, a mass block 3, a liquid medium 7, and a displacement meter 4;

[0018] The mass block 3 is suspended in the middle of the first housing 1. Springs 2 are connected to the centers of the two sides of the mass block 3 perpendicular to the main beam laterally. The other ends of the springs 2 are fixed to the inner wall of the first housing 1. A through hole is provided on the first housing 1. The displacement meter 4 is installed outside the first housing 1. The test end of the displacement meter 4 measures the relative displacement amount between the mass block 3 and the first housing 1 through the through hole. A transparent baffle is provided at the through hole, and the transparent baffle can be a thin acrylic plate. The first housing 1 is filled with a liquid medium 7. The buoyancy provided by the liquid medium 7 is the same as the total gravity of the mass block 3. The liquid medium 7 mainly provides damping to improve the accuracy of the measurement device.

[0019] The technical solution of the present utility model can also include the following technical details to better achieve the technical effect: The mass block 3 is a cubic hollow structure, thereby reducing the weight of the mass block 3 and reducing the influence of the gravity of the mass block 3 on the spring 2.

[0020] The technical solution of the present utility model can also include the following technical details to better achieve the technical effect: It further includes a power supply component 5 and a data transmission module 6; the power supply component 5 is electrically connected to the displacement meter 4 and continuously supplies power to the displacement meter 4, and the data transmission module 6 is electrically connected to the displacement meter 4 and saves and transmits the measurement data;

[0021] The power supply component 5, the data transmission module 6, and the displacement meter 4 are located on the same side of the first housing 1, and a second housing 8 is provided on the outside of the first housing 1. The power supply component 5, the data transmission module 6, and the displacement meter 4 are located in the second housing 8 to protect the power supply component 5, the data transmission module 6, and the displacement meter 4.

[0022] The usage method of the measurement device is: Fix the measurement device on the beam to be measured of the bridge, making the axis direction of the spring 2 parallel to the lateral direction of the beam; record the lateral displacement of the mass block 3 measured by the displacement meter 4, which is the lateral dynamic deflection of the bridge.

[0023] Although the embodiments of the present utility model have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present utility model. For those skilled in the art, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the embodiments shown and described herein.

Claims

1. An inertial transverse dynamic deflection measuring device for a main beam based on liquid buoyancy and damping, characterized in that It includes a hollow first housing, a spring, a mass block, a liquid medium, and a displacement gauge; The mass block is suspended in the middle of the first housing. Springs are connected to the centers of the two sides of the mass block that are perpendicular to the main beam transversely. The other ends of the springs are fixed to the inner wall of the first housing. There is a through hole on the first housing, and the displacement gauge is installed outside the first housing. The test end of the displacement gauge measures the relative displacement between the mass block and the first housing through the through hole. A transparent baffle is provided at the through hole. The first housing is filled with a liquid medium, and the buoyancy provided by the liquid medium is the same as the total gravity of the mass block.

2. The inertial type main beam lateral dynamic deflection measuring device based on liquid buoyancy and damping according to claim 1, characterized in that The mass block is a cubic hollow structure.

3. The inertial main girder lateral dynamic deflection measuring device based on liquid buoyancy and damping according to claim 1, characterized in that It further includes a power supply component and a data transmission module; the power supply component is electrically connected to the displacement gauge and continuously powers the displacement gauge, and the data transmission module is electrically connected to the displacement gauge and saves and transmits the measurement data; The power supply component, the data transmission module, and the displacement gauge are located on the same side of the first housing, and a second housing is provided outside the first housing. The power supply component, the data transmission module, and the displacement gauge are located in the second housing.

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