CN214039874U - Bridge space displacement monitoring device and system - Google Patents
Bridge space displacement monitoring device and system Download PDFInfo
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- CN214039874U CN214039874U CN202023257205.8U CN202023257205U CN214039874U CN 214039874 U CN214039874 U CN 214039874U CN 202023257205 U CN202023257205 U CN 202023257205U CN 214039874 U CN214039874 U CN 214039874U
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Abstract
The utility model relates to a bridge building technical field especially relates to a bridge space monitoring devices and system that shifts. The system comprises at least one GNSS antenna, at least one GNSS receiver corresponding to the GNSS antenna, at least one inclinometer and at least one base station corresponding to the GNSS antenna. The bridge space deflection monitoring device reasonably arranges the inclinometers and GNSS measuring points on the bridge girder through a combined monitoring method combining the GNSS and the inclinometers, realizes dynamic monitoring of the space deflection of the long-span bridge girder under the load action through a core algorithm, and is also provided with an automatic alarm device, so that an alarm can be given if the monitoring data of the space deflection of the bridge exceeds a preset threshold value, and the dynamic monitoring and intelligent monitoring of the space deflection of the long-span bridge girder can be realized.
Description
Technical Field
The utility model relates to a bridge building technical field especially relates to a bridge space monitoring devices and system that shifts.
Background
In bridge engineering, deformation monitoring needs to be carried out on a bridge frequently in order to guarantee the safety of the bridge, including deformation monitoring in the construction period and the operation period of the bridge, so that the purpose of mastering the deformation condition of the bridge is achieved. The existing bridge deformation monitoring method comprises the following steps: displacement sensor method, laser total station method, acceleration sensor method, inclinometer method, hydrostatic level method, GNSS method, and the like.
The displacement sensor method is a monitoring method for measuring bridge deformation by using a displacement sensor. Because the displacement sensor is a contact type sensor, the displacement sensor can realize measurement only by directly contacting with a measuring point, the displacement sensor is difficult to install and even incapable of measuring the point which is difficult to access, and the displacement sensor has obvious defects in the measurement of a long-span bridge structure.
The laser total station method is that a reflector is fixed on a monitoring point during measurement, and a total station is erected at a base station. After the target is manually aimed, a total station is used for tracking the reflector and measuring the change of the distance between the monitoring point and the base station. The method has the advantages of higher precision, but is difficult to capture a monitoring point when the structure swings or vibrates too much, and is difficult to track a target by laser particularly under the condition of severe atmosphere (such as typhoon, heavy rain or heavy fog, and the like) and poor in real-time performance. Therefore, the deformation of the bridge structure when the vehicle passes through cannot be measured.
The acceleration sensor method is that an acceleration sensor is installed on a structure during measurement, the acceleration of the structure during vibration is tested, and displacement is obtained through acceleration integration. The method has large displacement measurement error, and the amplitude of the whole vibration of the structure cannot be measured when the structure slowly vibrates. This method does not allow the static deformation due to the loading to be measured.
The inclinometer method is a method for calculating the bridge deformation by measuring the slope on the deflection line, and because the slopes at all positions on the bridge deflection line are not consistent, a large number of sensors are required to be arranged for obtaining the bridge deflection line, and a large transmission error exists in the calculation process of calculating the bridge deformation by the slope.
The static leveling method is to measure the deflection of the bridge by utilizing the communicated pipe principle, and has the defects that the dynamic deformation under the load action cannot be measured, the leveling is needed when measuring points are arranged, and the construction of the large-span bridge is difficult due to the influence of longitudinal slopes.
The GNSS method is a rapid monitoring method in which a satellite positioning system adopts GPS/beidou and other satellite positioning + PTK technologies, but the method is high in cost.
In view of the above, it is necessary to provide a device and a system for monitoring spatial displacement of a bridge to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a bridge space monitoring devices and system that shifts unites the joint monitoring method of GNSS and inclinometer, rationally arranges inclinometer and GNSS measurement station on the bridge, through the core algorithm, realizes the dynamic monitoring that shifts in the space of long-span bridge girder under the load effect, solves to have among the current monitoring method with high costs, the precision is poor, unable dynamic measurement scheduling problem.
In order to achieve the above object, the utility model provides a bridge space monitoring devices that shifts, include:
at least one GNSS antenna disposed at a GNSS survey point of the bridge;
at least one GNSS receiver corresponding to the GNSS antenna;
the inclinometers are arranged in one-to-one correspondence with the GNSS antennas; the inclinometer and the GNSS antenna are oppositely arranged on two sides of a preset section of the bridge girder;
at least one base station corresponding to the GNSS antenna; wherein the base station is arranged at a fixed position near the GNSS measuring point.
Preferably, the preset section is a cross section of the bridge girder.
Preferably, the number of the base stations is 1-8.
Preferably, the measuring direction of the inclinometer is the transverse torsion angle direction of the bridge girder.
Preferably, the data collected by the GNSS antenna and the base station includes one or more of beidou, GPS, GLONASS, GALILEO navigation system data.
Preferably, the data collected by the GNSS antenna and the base station is GPS navigation system data.
The utility model also provides a bridge space monitoring system that shifts, include as above-mentioned bridge space monitoring devices that shifts, still include with the GNSS antenna the GNSS receiver the inclinometer and base station communication connection's data gateway and with data gateway is through limited or wireless connection's backend server.
Compared with the prior art, the utility model provides a bridge space monitoring devices and system that shifts has following beneficial effect:
the utility model provides a bridge space monitoring devices and system that shifts, including at least one GNSS antenna that sets up in the GNSS survey point department of bridge, at least one with the GNSS receiver that the GNSS antenna corresponds, with the inclinometer of the setting of GNSS antenna one-to-one, at least one with the basic station that the GNSS antenna corresponds. The GNSS antenna is arranged at a GNSS measuring point, the inclinometer and the GNSS antenna are oppositely arranged on two sides of a preset section of the bridge girder, and the base station is arranged at a fixed position near the GNSS measuring point. The bridge space deflection monitoring device reasonably arranges the inclinometers and GNSS measuring points on the bridge girder through a combined monitoring method combining the GNSS and the inclinometers, realizes dynamic monitoring of the space deflection of the long-span bridge girder under the load action through a core algorithm, and is also provided with an automatic alarm device, so that an alarm can be given if the monitoring data of the bridge space deflection exceeds a preset threshold value, and the monitoring data can be analyzed and processed by corresponding technicians. The bridge space deflection monitoring device and the system have the advantages that multi-target measurement can be realized; the vertical deformation, the transverse deformation and the torsional deformation of the main beam of the long-span bridge can be measured; the monitoring cost is reduced; dynamic measurement under the load effect is realized, and the monitoring precision is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a top view of a bridge space displacement monitoring device according to an embodiment of the present invention;
fig. 2 is a schematic view of torsional deformation of a bridge girder of the device for monitoring spatial displacement of a bridge according to an embodiment of the present invention under load;
fig. 3 is a block diagram of an overall structure of a bridge space displacement monitoring system according to an embodiment of the present invention.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
The reference numbers illustrate:
a bridge girder 100;
a GNSS antenna 110;
a base station 120;
an inclinometer 130;
a data gateway 140;
a backend server 150;
a mobile terminal 160;
and a computer terminal 170.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1-2, an embodiment of a bridge space displacement monitoring device includes at least one GNSS antenna 110, at least one GNSS receiver corresponding to the GNSS antenna 110, an inclinometer 130 corresponding to the GNSS antenna 110, and at least one base station 120 corresponding to the GNSS antenna 110. The GNSS antenna 110 is disposed at a GNSS measurement point, the inclinometer 130 and the GNSS antenna 110 are disposed at two sides of a preset cross section of the bridge girder 100, and the base station 120 is disposed at a fixed position near the GNSS measurement point. Specifically, the GNSS antenna 110 and the base station 120 are configured to collect position coordinate data of a navigation system such as beidou, GPS, GLONASS, GALILEO, the GNSS receiver is configured to decode and convert monitoring data collected by the GNSS antenna 110, the inclinometer 130 is configured to collect an angle of lateral torsional deformation of the bridge girder 100, and the inclinometer 130 and the GNSS antenna 110 are disposed at left and right ends of a preset cross section of the bridge girder 100, and are generally disposed at upper surfaces of the bridge at the left and right ends of the cross section of the bridge girder 100. Meanwhile, the position of the GNSS antenna 110 is set at the position of the GNSS measurement point, that is, the position change data acquired by the GNSS antenna 110 is the position change data of the GNSS measurement point. In addition, the fixed department near the GNSS measurement point corresponds sets up one or more basic stations 120, and it should be noted that, the position of basic station 120 needs to be fixed, consequently can set up basic station 120 near the subaerial or pier position department such as bridge around, as long as guarantee that the position of basic station 120 keeps fixed and be close to the GNSS measurement point and all can regard as the utility model discloses a basic station 120, basic station 120's signal enhancement effect can increase substantially the accuracy of final bridge space monitoring data that shifts to satisfy the measuring needs.
Specifically, the bridge space displacement monitoring steps are as follows:
sampling first monitoring data acquired by GNSS measuring points according to a preset sampling frequency;
sampling the inclination data collected by the inclinometer 130 according to a preset sampling frequency;
sampling second monitoring data acquired by the base station 120 according to a preset sampling frequency;
resolving the first monitoring data and the second monitoring data to obtain position coordinate change data of the GNSS measuring point (X, Y, Z);
algorithmically modifying said position coordinate change data (X, Y, Z) and said tilt data;
calculating the position change data (X, Y, Z) and the inclination data of the GNSS measuring point according to a preset algorithm to obtain position coordinate change data (X ', Y ', Z ') of the inclinometer 130;
judging whether an automatic alarm triggering condition is met or not according to whether the position coordinate change data (X, Y, Z) of the GNSS measuring point and/or the position coordinate change data (X ', Y ', Z ') of the inclinometer 130 exceed a preset threshold or not;
when at least one of the position coordinate change data (X, Y, Z) of the GNSS measuring point and/or the position coordinate change data (X ', Y ', Z ') of the inclinometer 130 exceeds a preset threshold value, judging that the change data meets an automatic alarm triggering condition, and executing a preset automatic alarm instruction;
and when the position coordinate change data (X, Y, Z) of the GNSS measuring point and/or the position coordinate change data (X ', Y ', Z ') of the inclinometer 130 do not exceed a preset threshold, judging that the change data do not meet the automatic alarm triggering condition, and maintaining the current state.
The bridge space deflection monitoring device reasonably arranges the inclinometer 130 and GNSS measuring points on the bridge girder 100 through a combined monitoring method combining the GNSS and the inclinometer 130, realizes dynamic monitoring of the space deflection of the large-span bridge girder 100 under the load action through a corresponding core algorithm, and is also provided with an automatic alarm device, so that if the monitoring data of the bridge space deflection exceeds a preset threshold value, the alarm can be given for corresponding technicians to analyze and handle, and if the monitoring data does not exceed the preset threshold value, the normal monitoring state is maintained, and the bridge space deflection monitoring device and the system have the advantages that multi-target measurement can be realized; the vertical deformation, the transverse deformation and the torsional deformation of the main girder 100 of the long-span bridge can be measured; the monitoring cost is reduced; dynamic measurement under the load effect is realized, and the monitoring precision is improved.
As a specific embodiment of the present invention, the predetermined section is a cross section of the bridge girder 100. Specifically, the preset section of the bridge may be set according to actual conditions, that is, as long as the sections of the GNSS antenna 110 and the inclinometer 130 that are oppositely disposed at two ends of the section can be theoretically used as the preset section, preferably, in this embodiment, the preset section is a cross section of the bridge girder 100.
The inclinometer 130 is introduced to measure the torsional deformation of the bridge girder 100, and according to the bridge space displacement monitoring step, the change data (X ', Y ', Z ') of the position coordinates of the inclinometer 130 can be obtained through a preset algorithm according to the change data (X, Y, Z) of the position coordinates of the GNSS measurement points and the inclination data monitored by the inclinometer 130, so that the torsional deformation of the cross section of the bridge girder 100 can be obtained. Since the bridge girder 100 is mainly subjected to vertical load perpendicular to the upper surface of the bridge girder 100, there is mainly a vertical deformation difference between the GNSS measurement point and the inclinometer 130 on the same cross section, and the deformation amounts of the two directions are considered to be identical in space.
Specifically, the preset algorithm specifically includes: x ', Y', Z + L × sin β, where Z is the amount of change in the vertical direction of the GNSS measurement points, L is the horizontal distance between the GNSS measurement points and the inclinometer 130 measurement points, β is the measurement value of the inclinometer 130, and β is expressed in radians.
As a preferred embodiment of the present invention, the number of the base stations 120 is 1 to 8. The base station 120 is equivalent to a signal amplification device to some extent, and the accuracy of the position coordinate data of the final bridge space displacement monitoring can be greatly improved by arranging the base station 120 near the GNSS measurement point. It should be noted that the base station 120 needs to be located at a fixed position near the GNSS measurement point, and for example, the base station 120 may be located on the ground around the GNSS measurement point or on a pier near the GNSS measurement point.
In addition, it is known from the bridge space displacement monitoring step that the base station 120 needs to sample according to a preset sampling frequency, because the data collected by the base station 120 may be affected by cloud layer changes, atmospheric changes, and the like, and the collected monitoring data may also change correspondingly, the sampling frequency of the base station 120 needs to be kept synchronous with the sampling frequency of the GNSS antenna 110 and the inclinometer 130, so as to ensure that the data used in the subsequent calculation is data at the same time. Referring to fig. 1 again, preferably, in the present embodiment, the number of the base stations 120 is set to 4.
Further, the measurement direction of the inclinometer 130 is the transverse torsion angle direction of the bridge girder 100. Specifically, the inclinometer 130 may measure the inclination angle of the bridge in a preset direction. Because the utility model discloses need realize the change data of the horizontal torsional deformation volume of bridge girder 100, consequently the measuring direction of inclinometer 130 is the direction of the horizontal torsional angle of bridge girder 100, and the angle value that its was gathered is the angle value that the horizontal torsional deformation took place for bridge girder 100, and the change of this angle value is the change that bridge girder 100 took place to twist reverse promptly. Specifically, the unit of angle is in radians.
As a preferred embodiment of the present invention, the data collected by the GNSS antenna 110 and the base station 120 includes one or more of data of beidou, GPS, GLONASS, and GALILEO navigation systems. The GNSS antenna 110 and the base station 120 continuously acquire data of a satellite navigation system, which includes but is not limited to beidou, GPS, GLONASS, GALILEO system, and preferably, the data acquired by the GNSS antenna 110 and the base station 120 in this embodiment is data of the GPS navigation system.
Referring to fig. 3, the present invention provides a bridge space deflection monitoring system, which includes the above-mentioned bridge space deflection monitoring device, and further includes a data gateway 140 in communication connection with the GNSS antenna 110, the GNSS receiver, the inclinometer 130 and the base station 120, and a background server 150 in limited or wireless connection with the data gateway 140. The background server 150 processes and stores the monitored data correspondingly, and sends the result to the internet, so that the user can view the result through the mobile terminal 160 or the computer terminal 170 and perform corresponding treatment. If the monitoring data exceeds the preset threshold value, the background server 150 can automatically alarm in a sound-light or information sending mode, so that intelligent monitoring of the bridge space displacement is realized.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a bridge space monitoring devices that shifts which characterized in that includes:
at least one GNSS antenna disposed at a GNSS survey point of the bridge;
at least one GNSS receiver corresponding to the GNSS antenna;
the inclinometers are arranged in one-to-one correspondence with the GNSS antennas; the inclinometer and the GNSS antenna are oppositely arranged on two sides of a preset section of the bridge girder;
at least one base station corresponding to the GNSS antenna; wherein the base station is arranged at a fixed position near the GNSS measuring point.
2. The device for monitoring the spatial displacement of the bridge according to claim 1, wherein the preset section is a cross section of the main beam of the bridge.
3. The bridge space displacement monitoring device according to claim 1, wherein the number of the base stations is 1-8.
4. The device according to claim 1, wherein the measurement direction of the inclinometer is a transverse torsion angle direction of the main beam of the bridge.
5. The bridge spatial shift monitoring device of claim 1, wherein the data collected by the GNSS antenna and the base station comprises one or more of beidou, GPS, GLONASS, GALILEO navigation system data.
6. The bridge space displacement monitoring device according to claim 5, wherein the data collected by the GNSS antenna and the base station is GPS data.
7. A bridge space deflection monitoring system, which is characterized by comprising the bridge space deflection monitoring device as claimed in any one of claims 1 to 6, further comprising a data gateway in communication connection with the GNSS antenna, the GNSS receiver, the inclinometer and the base station, and a background server in wired or wireless connection with the data gateway.
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| CN202023257205.8U CN214039874U (en) | 2020-12-29 | 2020-12-29 | Bridge space displacement monitoring device and system |
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| CN202023257205.8U CN214039874U (en) | 2020-12-29 | 2020-12-29 | Bridge space displacement monitoring device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777727A (en) * | 2022-06-17 | 2022-07-22 | 长安大学 | Steel truss chord member three-dimensional deformation monitoring and early warning device and installation method thereof |
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- 2020-12-29 CN CN202023257205.8U patent/CN214039874U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777727A (en) * | 2022-06-17 | 2022-07-22 | 长安大学 | Steel truss chord member three-dimensional deformation monitoring and early warning device and installation method thereof |
| CN114777727B (en) * | 2022-06-17 | 2022-09-23 | 长安大学 | Steel truss chord member three-dimensional deformation monitoring and early warning device and installation method thereof |
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