Bridge vibration monitoring device

Abstract

The utility model relates to the technical field of bridge vibration monitoring, in particular to a bridge vibration monitoring device which comprises a monitoring assembly, the monitoring assembly comprises a shell, the shell is fixedly arranged on a bridge, a rotating shaft is horizontally arranged in the shell, and a vibration hammer is installed on the rotating shaft. The vibration hammer can drive the rotating shaft to rotate relative to the shell in the circumferential direction of the rotating shaft under the inertia effect, a termination column and a current change structure are arranged in the shell and located on the two opposite sides in the radial direction of the rotating shaft, and the termination column makes contact with the side, in the radial direction of the rotating shaft, of the vibration hammer. The current changing structure can generate changing current with the current value changing due to the fact that the vibration hammer applies force to the current changing structure, and the current value variation of the changing current is related to the magnitude of the force applied to the current changing structure by the vibration hammer. The device is simple in structure, is less affected by temperature and humidity, is higher in weather resistance and anti-interference capability, can stably and effectively monitor for a long time, and can continuously play a role under the influence of severe weather.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge vibration monitoring, in particular to a bridge vibration monitoring device. Background Art

[0002] As an integral part of the transportation system, bridges have played an important role in the development and evolution of human civilization. The safety of bridges is a major issue concerning people's livelihood. In the monitoring of bridge safety, the monitoring of bridge vibration is an important evaluation indicator. The vibration information of bridges can reflect the safety of bridge structures and the durability of bridges, and provide a basis and guidance for bridge maintenance and management decisions. With the development of the economy, more and more bridges are being built, so the safety monitoring of bridges becomes more important.

[0003] At present, when monitoring bridge vibration, vibration sensors are installed on the bottom surface of the bridge to detect bridge vibration, and the detected bridge vibration is transmitted to the central control platform in real time. Finally, the central control platform determines and completes the alarm operation when appropriate.

[0004] However, bridges often vibrate in extremely severe weather conditions. The bridge vibration monitoring devices in the prior art use a large number of electrical equipment and have a relatively complex structure, which results in the bridge vibration monitoring devices in the prior art having weak anti-interference capabilities when affected by severe weather and being unable to continuously and stably output vibration information, causing the monitoring data of the bridge vibration monitoring devices to be inaccurate and fail, hindering the subsequent safe maintenance of the bridge, and the cost of the bridge vibration monitoring devices in the prior art is relatively high. Utility Model Content

[0005] In order to solve the technical problem that the bridge vibration monitoring device in the prior art adopts a large number of electrical equipment and has a relatively complex structure, resulting in weak anti-interference ability and inability to continuously and stably output vibration information when affected by severe weather, the utility model provides a bridge vibration monitoring device.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A bridge vibration monitoring device includes a monitoring component, the monitoring component includes a shell, the shell is fixedly arranged on the bridge, a rotating shaft is arranged inside the shell, the rotating shaft is arranged horizontally, a vibrator is installed on the rotating shaft, the vibrator can drive the rotating shaft to rotate relative to the shell along the circumferential direction of the rotating shaft under the action of inertia, a termination column and a current change structure are arranged inside the shell, the termination column and the current change structure are located on opposite sides of the radial direction of the rotating shaft, the termination column is in contact with one side of the vibrator along the radial direction of the rotating shaft, the current change structure can generate a changing current whose current value changes due to the force applied by the vibrator to the current change structure, and the current value change of the changing current is related to the force applied by the vibrator to the current change structure. The structure of the present application is simple and stable, less affected by temperature and humidity, strong in weather resistance and anti-interference ability, can ensure stable, long-term and effective monitoring, and can continue to function stably under adverse conditions and the influence of adverse weather.

[0008] As a preferred implementation of a bridge vibration monitoring device, the current change structure includes a piezoelectric ceramic sheet, which is fixed in a housing, located on one side of the rotating shaft in the radial direction, and the axial surface of the piezoelectric ceramic sheet contacts one side of the vibrator along the radial direction of the rotating shaft, and the side of the pressed ceramic sheet away from the vibrator is electrically connected to two wires, which are connected to external electrical equipment after extending out of the housing. In the current change structure of the present application, a piezoelectric ceramic sheet is used, and the current change value of the circuit where the piezoelectric ceramic sheet is located is used to reflect the amplitude of the bridge vibration, which is sensitive and reliable, has a simple structure, and has strong anti-interference ability.

[0009] As a preferred implementation of a bridge vibration monitoring device, the current change structure includes a sliding rheostat, which includes a metal rod and a porcelain tube parallel to each other, a sliding piece is slidably mounted on the metal rod, a resistance wire is wound on the porcelain tube, the sliding piece contacts the resistance wire, the sliding piece is hinged to the vibrator, the hinge axis between the sliding piece and the vibrator is parallel to the rotating shaft, the vibrator is made of insulating material, and the sliding rheostat is connected to an external electrical device. The sliding rheostat is used in the current change structure of the present application, and the current change value of the circuit where the sliding rheostat is located reflects the amplitude of the bridge vibration. The structure is simple and the anti-interference ability is strong.

[0010] As a preferred implementation of a bridge vibration monitoring device, the side of the vibration hammer close to the end column is connected to one end of a return spring, and the other end of the return spring is connected to a spring seat, which is installed on the inner wall of the housing. The return spring can return the vibration hammer to its original position.

[0011] As a preferred implementation of a bridge vibration monitoring device, the housing is provided with a screw seat, the screw seat has a screw hole, the screw passes through the screw hole and is connected to the bridge, and the screw is threadedly connected to the screw hole, so that the housing can be fixed to the bridge, which is convenient, fast and reliable.

[0012] As a preferred implementation of a bridge vibration monitoring device, a mounting column is provided inside the housing, the mounting column has a shaft hole, the shaft passes through the shaft hole, and the shaft and the shaft hole are in clearance fit. When the vibrating hammer moves relative to other structures in the device under the action of inertia, the shaft connected to the vibrating hammer can rotate flexibly in the shaft hole.

[0013] As a preferred implementation of a bridge vibration monitoring device, the rotating shaft is connected to one end of a vibrating arm, the vibrating arm is a columnar structure, the vibrating arm is vertically arranged with the rotating shaft, and the other end of the vibrating arm is connected to a vibrating hammer. The vibrating arm can connect the rotating shaft and the vibrating hammer together.

[0014] As a preferred implementation of a bridge vibration monitoring device, the vibrator is a columnar structure, the vibrator is vertically arranged with the vibrator arm, and the length of the side of the vibrator close to the end column is shorter than the length of the side of the vibrator close to the current change structure, which can improve the space utilization of the housing.

[0015] As a preferred implementation of a bridge vibration monitoring device, it includes three monitoring components, namely, an X-axis monitoring component, a Y-axis monitoring component, and a Z-axis monitoring component. The rotating shaft in the X-axis monitoring component and the rotating shaft in the Y-axis monitoring component are arranged perpendicular to each other in the horizontal plane; the end columns in the X-axis monitoring component and the Y-axis monitoring component are both located on the left side of their respective vibrating hammers, and the end column in the Z-axis monitoring component is located below the vibrating hammer. In this way, the present application can monitor vibrations in the three directions of X, Y, and Z.

[0016] As a preferred implementation of a bridge vibration monitoring device, the vibrating hammer in the X-axis monitoring assembly and the vibrating hammer in the Y-axis monitoring assembly are both in a naturally suspended state.

[0017] The beneficial effects of the utility model include:

[0018] The present application has a simple and stable structure, is less affected by temperature and humidity, has strong weather resistance and anti-interference capabilities, can ensure stable, long-term and effective monitoring, and can continue to function stably under adverse conditions and severe weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the internal structure of a monitoring component in a bridge vibration monitoring device according to Embodiment 1 of the present utility model;

[0021] Figure 2This is a schematic diagram of the three-dimensional structure of a bridge vibration monitoring device according to Example 1 of the utility model.

[0022] List of parts and reference numerals:

[0023] 1. X-axis monitoring component; 2. Y-axis monitoring component; 3. Z-axis monitoring component;

[0024] 4. Housing; 41. Screw seat; 42. Screw hole; 43. Mounting column; 44. Rotating shaft hole; 45. Termination column; 46. Fixing bracket; 47. Spring seat;

[0025] 5. Rotating shaft; 6. Vibrating arm; 7. Vibrating hammer; 8. Return spring; 9. Piezoelectric ceramic piece. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Embodiment 1:

[0028] Reference Figure 1-2 The present embodiment proposes a bridge vibration monitoring device, including three monitoring components, namely an X-axis monitoring component 1, a Y-axis monitoring component 2 and a Z-axis monitoring component 3. Each monitoring component includes a shell 4. The outside of the shell 4 is connected to a screw seat 41. The screw seat 41 has a screw hole 42. The screw is threadedly connected to the screw hole 42. The screw passes through the screw hole 42 and is connected to the bridge, so that the shell 4 is fixedly set on the bridge; the inside of the shell 4 is provided with a mounting column 43. The mounting column 43 has a shaft hole 44. The shaft 5 passes through the shaft hole 44, and the shaft 5 and the shaft hole 44 are clearance-matched.

[0029] A rotating shaft 5 is provided inside the housing 4. The rotating shaft 5 is horizontally arranged. The rotating shaft 5 in the X-axis monitoring component 1 and the rotating shaft 5 in the Y-axis monitoring component 2 are perpendicularly arranged to each other in the horizontal plane. The rotating shaft 5 is connected to one end of a vibrating arm 6. The vibrating arm 6 is a columnar structure. The vibrating arm 6 is perpendicularly arranged to the rotating shaft 5. The other end of the vibrating arm 6 is connected to a vibrating hammer 7. The vibrating hammer 7 is a columnar structure. The vibrating hammer 7 is perpendicularly arranged to the vibrating arm 6. The vibrating hammer 7 in the X-axis monitoring component 1 and the vibrating hammer 7 in the Y-axis monitoring component 2 are both in a naturally suspended state. The vibrating hammer 7 can drive the rotating shaft 5 to rotate relative to the housing 4 along the circumferential direction of the rotating shaft 5 under the action of inertia. The housing 4 is provided with a termination column 45 and a current changing structure. The termination column 45 and the current changing structure are located on opposite sides of the rotating shaft 5 in the radial direction. The termination column 45 contacts one side of the vibrating hammer 7 along the radial direction of the rotating shaft 5. The length of the side of the vibrating hammer 7 close to the termination column 45 is shorter than the length of the side of the vibrating hammer 7 close to the current changing structure. The side of the vibrating hammer 7 close to the termination column 45 is connected to one end of the reset spring 8. The other end of the reset spring 8 is connected to the spring seat 47. The spring seat 47 is installed on the inner wall of the housing 4. The reset spring 8 plays the role of returning the vibrating hammer 7 to its original position. The termination columns 45 in the X-axis monitoring assembly 1 and the Y-axis monitoring assembly 2 are both located on the left side of their respective vibrating hammers 7, and the termination column 45 in the Z-axis monitoring assembly 3 is located below the vibrating hammer 7.

[0030] The current changing structure can generate a changing current whose current value changes due to the force applied by the vibrating hammer 7 to the current changing structure, and the amount of change in the current value of the changing current is related to the force applied by the vibrating hammer 7 to the current changing structure. The current changing structure in Example 1 includes a piezoelectric ceramic sheet 9, which is fixed in the housing 4. The piezoelectric ceramic sheet 9 is located on one side in the radial direction of the rotating shaft 5. The axial surface of the piezoelectric ceramic sheet 9 contacts one side of the vibrating hammer 7 along the radial direction of the rotating shaft 5. The side of the pressed ceramic away from the vibrating hammer 7 is electrically connected to two wires, and the two wires are connected to external electrical equipment after extending out of the housing 4. The external electrical equipment includes at least a power supply and a current signal analyzer. The current signal analyzer can record, transform and analyze the current change value of the changing current, thereby forming a vibration waveform signal to obtain vibration information of the bridge.

[0031] The working principle of embodiment 1 is:

[0032] When vibration occurs, the entire device will vibrate together with the bridge to which it is fixed. Since the solid metal hammer 7 has inertia, it will maintain its original position and move relative to other structures of the entire device, especially relative to the piezoelectric ceramic sheet 9. Since the end column 45 limits the movement of one side of the hammer 7, the hammer 7 can only apply pressure to the piezoelectric ceramic sheet 9. The force exerted by the hammer 7 on the piezoelectric ceramic sheet 9 due to inertia reflects the magnitude of the vibration amplitude of the bridge. The piezoelectric ceramic sheet 9 will generate a corresponding change in current due to the force of the hammer 7. Therefore, the magnitude of the change in the current generated on the piezoelectric ceramic sheet 9 can reflect the magnitude of the vibration amplitude of the bridge. The larger the change in the current, the larger the amplitude of the bridge vibration. The smaller the change in the current, the smaller the amplitude of the bridge vibration. Finally, the external electrical equipment will process the current signal on the piezoelectric ceramic sheet 9 into the required graphics or digital information and record it to form a vibration waveform signal to obtain the vibration information of the bridge.

[0033] Reference Figure 2 Each monitoring component can only monitor the linear vibration of the bridge in a certain direction. Figure 2 According to the placement and viewing direction, the X-axis monitoring component 1 can monitor the vibration of the bridge in the left-right direction, the Y-axis monitoring component 2 can monitor the vibration of the bridge in the front-back direction, and the Z-axis monitoring component 3 can monitor the vibration of the bridge in the up-down direction. In this way, the vibration of the bridge in all directions, such as up-down, left-right, and front-back directions, can be monitored. Those skilled in the art should understand that when a bridge vibrates, it vibrates back and forth in a certain direction.

[0034] As described above, the present embodiment has a simple and stable structure, is less affected by temperature and humidity, has strong weather resistance, can ensure stable, long-term and effective monitoring, and can continue to function stably under adverse conditions and weather. The present embodiment mainly responds to the supply of important vibration data under extreme conditions. In practical applications, other automatic monitoring devices can be used together with the monitoring device in the present embodiment to respond to adverse and uncertain natural environments and continuously and stably monitor the vibration information of the bridge.

[0035] The housing 4 in this embodiment is an L-shaped housing, and the piezoelectric ceramic sheet 9 is connected to the housing 4 via a fixing frame 46 .

[0036] In this embodiment, under the natural state, there is no acting force between the vibrator 7 and the end column 45, the vibrator 7 and the reset spring 8, and the vibrator 7 and the piezoelectric ceramic piece 9 in the X-axis monitoring component 1 and the Y-axis monitoring component 2; there is no acting force between the vibrator 7 and the reset spring 8, and the vibrator 7 and the piezoelectric ceramic piece 9 in the Z-axis monitoring component 3; and the end column 45 has a supporting force on the vibrator 7.

[0037] Embodiment 2:

[0038] The difference between Example 2 and Example 1 lies in the current changing structure. The current changing structure in Example 2 includes a sliding rheostat. The sliding rheostat includes a metal rod and a porcelain tube parallel to each other. A sliding piece is slidably mounted on the metal rod. A resistance wire is wound on the porcelain tube. The sliding piece contacts the resistance wire. The sliding piece is hinged to the vibrator 7. The hinge axis between the sliding piece and the vibrator 7 is arranged parallel to the rotating shaft 5. The vibrator 7 is made of insulating material. The sliding rheostat is connected to an external electrical device. The external electrical device includes at least a power supply and a current signal analyzer. The current signal analyzer can record, convert and analyze the current change value of the changing current, thereby forming a vibration waveform signal and obtaining the vibration information of the bridge.

[0039] The working principle of embodiment 2 is:

[0040] When vibration occurs, the whole device will vibrate together with the bridge it is fixed on, and because the solid metal vibrator 7 has inertia, it will maintain its original position. The vibrator 7 will drive the slider to move relative to other structures of the whole device, so that the slider can slide on the metal rod, change the resistance of the sliding rheostat, and thus change the current on the circuit where the sliding rheostat is located. The displacement of the slider driven by the vibrator 7 due to inertia reflects the magnitude of the vibration amplitude of the bridge. The greater the displacement of the slider, the greater the change value of the current on the circuit where the sliding rheostat is located. Therefore, the change value of the current on the circuit where the sliding rheostat is located can reflect the magnitude of the vibration amplitude of the bridge. The greater the change value of the current, the greater the amplitude of the bridge vibration. The smaller the change value of the current, the smaller the amplitude of the bridge vibration. Finally, the external electrical equipment will process the current signal on the sliding rheostat into the required graphics or digital information and record it to form a vibration waveform signal to obtain the vibration information of the bridge.

[0041] The sliding resistor in this embodiment is a sliding resistor in the prior art.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bridge vibration monitoring device, comprising a monitoring component, the monitoring component comprising a housing (4), the housing (4) being fixedly arranged on the bridge, characterized in that: A rotating shaft (5) is provided inside the housing (4), the rotating shaft (5) is arranged horizontally, a vibrating hammer (7) is mounted on the rotating shaft (5), and the vibrating hammer (7) can drive the rotating shaft (5) to rotate relative to the housing (4) along the circumferential direction of the rotating shaft (5) under the action of inertia. A termination column (45) and a current changing structure are provided inside the housing (4), the termination column (45) and the current changing structure are located on two opposite sides of the rotating shaft (5) in the radial direction, the termination column (45) is in contact with one side of the vibrating hammer (7) in the radial direction of the rotating shaft (5), and the current changing structure can generate a changing current whose current value changes due to the force applied by the vibrating hammer (7) to the current changing structure, and the amount of change in the current value of the changing current is related to the magnitude of the force applied by the vibrating hammer (7) to the current changing structure.

2. A bridge vibration monitoring device according to claim 1, characterized in that: The current changing structure comprises a piezoelectric ceramic sheet (9), the piezoelectric ceramic sheet (9) being fixed in a housing (4), the piezoelectric ceramic sheet (9) being located on one side of a rotating shaft (5) in a radial direction, the axial surface of the piezoelectric ceramic sheet (9) being in contact with one side of a vibrating hammer (7) in a radial direction of the rotating shaft (5), the side of the piezoelectric ceramic sheet away from the vibrating hammer (7) being electrically connected to two wires, and the two wires being connected to external electrical equipment after extending out of the housing (4).

3. A bridge vibration monitoring device according to claim 1, characterized in that: The current changing structure comprises a sliding rheostat, which comprises a metal rod and a porcelain tube parallel to each other, a sliding piece is slidably mounted on the metal rod, a resistance wire is wound on the porcelain tube, the sliding piece contacts the resistance wire, the sliding piece is hinged to a vibrating hammer (7), a hinge axis between the sliding piece and the vibrating hammer (7) is arranged parallel to the rotating shaft (5), the vibrating hammer (7) is made of insulating material, and the sliding rheostat is connected to an external electrical device.

4. A bridge vibration monitoring device according to claim 1, characterized in that: One side of the vibrating hammer (7) close to the end column (45) is connected to one end of the return spring (8), and the other end of the return spring (8) is connected to the spring seat (47), and the spring seat (47) is installed on the inner wall of the housing (4).

5. A bridge vibration monitoring device according to claim 1, characterized in that: The housing (4) is provided with a screw seat (41), the screw seat (41) is provided with a screw hole (42), the screw passes through the screw hole (42) and is connected to the bridge, and the screw is threadedly connected to the screw hole (42).

6. A bridge vibration monitoring device according to claim 1, characterized in that: A mounting column (43) is provided inside the housing (4), the mounting column (43) is provided with a rotating shaft hole (44), the rotating shaft (5) passes through the rotating shaft hole (44), and the rotating shaft (5) and the rotating shaft hole (44) are clearance-matched.

7. A bridge vibration monitoring device according to claim 1, characterized in that: The rotating shaft (5) is connected to one end of a vibration arm (6); the vibration arm (6) is a columnar structure; the vibration arm (6) and the rotating shaft (5) are arranged vertically; and the other end of the vibration arm (6) is connected to a vibration hammer (7).

8. A bridge vibration monitoring device according to claim 7, characterized in that: The vibrating hammer (7) is a columnar structure. The vibrating hammer (7) is arranged vertically to the vibrating arm (6). The length of a side of the vibrating hammer (7) close to the termination column (45) is shorter than the length of a side of the vibrating hammer (7) close to the current changing structure.

9. A bridge vibration monitoring device according to any one of claims 1 to 8, characterized in that: The invention comprises three monitoring components, namely an X-axis monitoring component (1), a Y-axis monitoring component (2) and a Z-axis monitoring component (3); the rotating shaft (5) in the X-axis monitoring component (1) and the rotating shaft (5) in the Y-axis monitoring component (2) are arranged perpendicular to each other in a horizontal plane; the terminating columns (45) in the X-axis monitoring component (1) and the Y-axis monitoring component (2) are both located on the left side of their respective vibrating hammers (7), and the terminating column (45) in the Z-axis monitoring component (3) is located below the vibrating hammer (7).

10. A bridge vibration monitoring device according to claim 9, characterized in that: The vibrating hammer (7) in the X-axis monitoring component (1) and the vibrating hammer (7) in the Y-axis monitoring component (2) are both in a naturally suspended state.

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