CN111561903A - Bridge deformation monitoring system and method - Google Patents
Bridge deformation monitoring system and method Download PDFInfo
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- CN111561903A CN111561903A CN202010672581.9A CN202010672581A CN111561903A CN 111561903 A CN111561903 A CN 111561903A CN 202010672581 A CN202010672581 A CN 202010672581A CN 111561903 A CN111561903 A CN 111561903A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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Abstract
The invention discloses a bridge deformation monitoring system and a method, wherein a bridge deformation limit value and a sampling frequency are set; acquiring deformation data of a plurality of bridge monitoring points, and calculating the deformation value of each bridge monitoring point; respectively comparing the deformation value of each bridge monitoring point with the set bridge deformation limit value; if the deformation value of the bridge monitoring point exceeds the set bridge deformation limit value, acquiring new deformation data of the over-limit bridge monitoring point measured at a set point by using a set sampling frequency, and acquiring angle change data of a plurality of tracks relative to the bridge by using the set sampling frequency; calculating a millimeter-scale deformation value of the bridge according to the new deformation data of the over-limit bridge monitoring points; and fusing the angle change data of the plurality of tracks relative to the bridge, and calculating the track inclination and distortion attitude data.
Description
Technical Field
The invention relates to the technical field of bridge monitoring, in particular to a bridge deformation monitoring system and method.
Background
The existing bridge, especially the railway bridge under the action of the moving load of a high-speed train has the characteristics of real-time vibration and instantaneous deformation. At present, the main methods applied to monitoring displacement or deformation of bridge structures are a GPS method, a level method, a close-range photogrammetry method, laser measurement and the like.
The GPS monitoring technology has the characteristics of high sampling rate (20 Hz), capability of performing static and dynamic monitoring and the like, has unique superiority in the aspect of large-scale structure monitoring, but has certain limitation, because satellite signals are shielded and the influence of multi-path base effect is caused, the monitoring precision and reliability are not high, and the elevation precision is far lower than that of the horizontal position; in the actual production, the level method has the disadvantages of large workload, complex process and certain limitation, and is difficult to meet the requirement of actual monitoring; the close-range photogrammetry method can simultaneously determine the spatial positions of multiple points at a certain moment, and the photographic data can be compared at any time, but the absolute accuracy of observation is not better than that of the traditional measurement method, and the accuracy of the close-range photogrammetry method mainly depends on the longitudinal distance and the focal length. The laser measurement method can monitor the deformation condition of the bridge structure in real time through sensor acquisition, wireless transmission and cloud platform related equipment.
However, the above methods cannot realize multi-point monitoring and fixed-point measurement of an over-limit point, and cannot realize millimeter-scale deformation monitoring of a bridge. In addition, the method does not consider the influence of track change on bridge deformation, and does not monitor the bridge deformation in combination with the track change.
Disclosure of Invention
In view of the above, the present invention provides a bridge deformation monitoring system and method, which monitor deformation data of a plurality of monitoring points of a bridge, perform fixed-point measurement on the monitoring points beyond limit, increase bridge deformation from centimeter level to millimeter level, and determine a change value of a track by combining absolute change of the track with fusion of relative changes.
The technical scheme adopted by the bridge deformation monitoring system provided by the first aspect of the invention is as follows:
a bridge deformation monitoring system, the system comprising:
the data monitoring device is used for monitoring deformation data of a plurality of bridge monitoring points distributed on the bridge and transmitting the deformation data to the data processing device; receiving a measurement instruction and a set sampling frequency value sent by a data processing device, carrying out fixed-point tracking measurement on the over-limited bridge monitoring point at the set sampling frequency to obtain new deformation data of the over-limited bridge monitoring point, acquiring angle change data of a plurality of tracks relative to the bridge at the set sampling frequency, and respectively sending the new deformation data of the over-limited bridge monitoring point and the angle change data of the plurality of tracks relative to the bridge to the data processing device;
the data processing device is used for setting a bridge deformation limit value and a sampling frequency; acquiring deformation data of a plurality of bridge monitoring points distributed on a bridge monitored by a data monitoring device, and calculating the deformation value of each bridge monitoring point; respectively comparing the deformation value of each bridge monitoring point with the set bridge deformation limit value; if the deformation value of the bridge monitoring point exceeds the set bridge deformation limit value, sending a measurement instruction and a set sampling frequency value to a data monitoring device; acquiring new deformation data of the over-limit bridge monitoring point, which is measured by a data monitoring device at a set sampling frequency fixed point, and angle change data of a plurality of tracks relative to the bridge, which is acquired at the set sampling frequency; and calculating millimeter-scale deformation values of the bridge according to the new deformation data of the over-limit bridge monitoring points, fusing the angle change data of the plurality of tracks relative to the bridge, and calculating track inclination and distortion attitude data.
The bridge deformation monitoring method provided by the second aspect of the invention adopts the technical scheme that:
a bridge deformation monitoring method comprises the following steps:
setting a bridge deformation limit value and a sampling frequency;
acquiring deformation data of a plurality of bridge monitoring points distributed on a bridge, and calculating the deformation value of each bridge monitoring point;
respectively comparing the deformation value of each bridge monitoring point with the set bridge deformation limit value;
if the deformation value of the bridge monitoring point exceeds the set bridge deformation limit value, acquiring new deformation data of the over-limit bridge monitoring point measured at a set point by using a set sampling frequency, and acquiring angle change data of a plurality of tracks relative to the bridge by using the set sampling frequency;
calculating a millimeter-scale deformation value of the bridge according to the new deformation data of the over-limit bridge monitoring points;
and (3) fusing the angle change data of the plurality of tracks relative to the bridge, and calculating the lateral displacement, inclination, distortion and settlement values of the tracks.
The method comprises the steps of firstly monitoring deformation data of a plurality of bridge monitoring points, comparing set deformation limit values, finding out an out-of-limit bridge monitoring point, carrying out fixed-point measurement on the out-of-limit monitoring point, calculating a millimeter-scale deformation value of the bridge according to the deformation data of the out-of-limit bridge monitoring point measured at fixed points, increasing the deformation of the bridge from centimeter to millimeter, simultaneously collecting position change data of a plurality of tracks relative to the bridge at a certain frequency, fusing the position change data of the plurality of tracks relative to the bridge, and calculating attitude conditions such as inclination and distortion of the tracks, thereby realizing accurate monitoring of the deformation of the bridge.
Drawings
For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:
fig. 1 is a block diagram of a bridge deformation monitoring system according to the present embodiment;
fig. 2 is a block diagram of a data monitoring apparatus according to the present embodiment;
fig. 3 is a block diagram of the structure of the data processing apparatus proposed in the present embodiment;
fig. 4 is a first flowchart of a bridge deformation monitoring method provided in this embodiment;
fig. 5 is a second flowchart of the bridge deformation monitoring method provided in this embodiment;
Detailed Description
In order to realize the real-time deformation monitoring of the bridge, the application provides a bridge deformation monitoring system, and the system carries out bridge monitoring point deformation data and track change data relative to the bridge through the linkage of GNSS positioning equipment, a measuring robot, laser and a tilt sensor to acquire, and the bridge monitoring point deformation data calculates the millimeter-scale deformation value of the bridge, fuses the track change data relative to the bridge, and calculates the inclination and distortion conditions of the track.
Referring to fig. 1, the bridge deformation monitoring system 100 includes a data monitoring device 101 and a data processing device 102, wherein:
the data monitoring device 101 is used for monitoring deformation data of a plurality of bridge monitoring points and sending the deformation data to the data processing device; the method comprises the steps of receiving a measurement instruction sent by a data processing device and a set sampling frequency value, carrying out fixed-point tracking measurement on an overrun monitoring point with deformation data larger than a deformation limit value at the set sampling frequency to obtain new overrun bridge monitoring point deformation data, collecting a plurality of track deformation data at the set sampling frequency, and sending the new overrun bridge monitoring point deformation data and the plurality of track deformation data to the data processing device respectively.
The data processing device 102 is configured to set a bridge deformation limit, obtain deformation data of the plurality of monitoring points monitored by the data monitoring device, calculate a centimeter-level deformation value of each bridge monitoring point, compare the deformation value of each bridge monitoring point with the set deformation limit, and determine whether the deformation value of each bridge monitoring point exceeds the deformation limit; if the deformation value of the bridge monitoring point exceeds the set deformation limit value, sending a measurement instruction and a set sampling frequency to a data monitoring device; and receiving the deformation data of the new over-limit bridge monitoring point and the deformation data of the plurality of tracks, which are monitored by the data monitoring device in a fixed-point tracking manner, calculating the millimeter-scale deformation value of the bridge in real time according to the new over-limit deformation data of the bridge monitoring point, fusing the deformation data of the plurality of tracks, and calculating the attitude data such as track inclination and distortion.
This bridge deformation monitoring system passes through the deformation data of a plurality of monitoring points of data monitoring device real-time supervision bridge, deformation value of centimetre level of every bridge monitoring point is calculated according to the deformation data of a plurality of bridge monitoring points through data processing apparatus, and judge whether the deformation value of a plurality of bridge monitoring points exceeds preset deformation limit value, if exceed, then control data monitoring device monitors the deformation data of the bridge monitoring point of transfiniting again with the frequency of setting for, calculate the millimeter level deformation data of bridge in real time, and gather a plurality of orbital deformation data with the sampling frequency of setting for, calculate orbital slope and distortion condition in real time.
The system that this embodiment provided monitors the deformation data of a plurality of bridge monitoring points through data processing device to carry out fixed point measurement to the bridge monitoring point that transfinites, simultaneously, still gather the change data of the relative bridge of track, calculate millimeter level bridge deformation volume through data processing device, and combine the fusion of relative change data with a plurality of track absolute change to confirm orbital change value.
Referring to fig. 2, the data monitoring apparatus includes a GNSS positioning device, a measurement robot, and a plurality of triaxial inclinometers and laser ranging integrated sensor devices, which are disposed at each monitoring point.
In this embodiment, in order to realize the comprehensive monitoring of the bridge deformation data, a plurality of monitoring points are arranged on the bridge. The arrangement mode of the monitoring points is as follows: at two side span beam ends of the main bridge, 1/2 spans and 1/4 spans, 1/2 spans and 3/4 spans respectively form 7 sections, and each section is provided with a measuring point at two sides and the middle, so that the total number of monitoring points is 21; 2 monitoring points are respectively arranged above the two main bridge towers, and the total number of the monitoring points is 4.
And respectively arranging high-precision GNSS positioning equipment at each monitoring point, wherein the sampling frequency of the GNSS positioning equipment is 20 Hz. The GNSS positioning equipment is used for dynamically monitoring the deformation data of each monitoring point in real time and wirelessly transmitting the monitored data to the data processing device. The data processing device can utilize each GNSS positioning device to dynamically monitor deformation data of each bridge monitoring point in real time, the deformation data comprises position coordinate data of the bridge monitoring points, and centimeter-level deformation values of each bridge monitoring point can be calculated by utilizing the position coordinate data of the bridge monitoring points.
Two 0.5 second high-precision measuring robots are arranged at the middle gap between the main bridge tower and the main bridge, the measuring robot is linked with the GNSS positioning equipment, when the GNSS positioning equipment monitors that the deformation value of a certain monitoring point exceeds a set deformation limit value, the monitoring point is shown to be changed remarkably, the data processing device sends a measuring instruction to the measuring robot, the measuring robot continuously tracks and observes a prism at the section, fixed-point tracking measurement is carried out on the ultralimit monitoring point, data are collected for 5 times per second, and the deformation value of the monitoring point is improved to a millimeter level from a centimeter level. In the embodiment, the sampling frequency of the measuring robot can reach 5Hz per second, and the precision can reach millimeter level. The measuring robot adopts the prior art, and is not described in detail in the application.
In this embodiment, the track and the sleeper are firmly connected through a rigid body, a plurality of triaxial inclinometers and laser ranging integrated sensor devices are arranged on one side of the sleeper, three-dimensional angle change data of the track are collected in real time through the triaxial inclinometer and laser ranging integrated sensor devices, and the height change value of the track surface can be calculated. The working process of the triaxial inclinometer and the laser ranging integrated sensor equipment is as follows: the three-axis inclinometer and laser ranging integrated sensor equipment is aligned to the ballast retaining wall, and the relative position change relation between the track and the bridge is analyzed by combining the three-dimensional angle change of the track and the monitoring of the bridge main body.
The three-axis inclinometer and laser ranging integrated sensor equipment acquires three-dimensional angle change data of a plurality of tracks at a set sampling frequency, wherein the three-dimensional angle change data comprises track displacement, and an X-axis angle and a Y-axis angle of each track node; the three-dimensional angle change data of a plurality of orbits that can gather transmit for data processing device, data processing device fuses the three-dimensional angle change data of the orbit that a plurality of triaxial inclinometers and laser rangefinder integrated sensor equipment gathered, calculates attitude data such as orbit slope and distortion.
In this embodiment, the parameters of the three-axis inclinometer and the laser ranging integrated sensor device are as follows: angle resolution: 0.0001 degree, and the repetition precision is +/-0.0005 degree; ranging resolution: 0.1mm, repetition degree +/-0.15 mm and sampling frequency of 1Hz per second.
When the deformation value of a certain monitoring point monitored by the GNSS equipment exceeds a set deformation limit value, the sampling frequency of a plurality of triaxial inclinometers and laser ranging integrated sensors is set on line in real time, the data sampling frequency is improved, and the maximum data sampling frequency can reach 5 Hz.
The system provided by the embodiment can reduce the loss of the equipment, prolong the service life of the equipment and save the cost. For example, if the measuring robot monitors the high frequency for 24 hours, the service life is reduced; when the sensor is used for 24-hour high-frequency monitoring, the battery consumption is large, and the service life is also reduced. Because the GNSS device judges that the risk is increased, the high-frequency monitoring is triggered in a linkage mode, the energy consumption is saved, and the cost is saved.
Referring to fig. 3, the data processing apparatus 102 includes a bridge deformation determining unit, a bridge deformation calculating unit, and an orbit deformation calculating unit; wherein:
the bridge deformation judging unit is used for setting a bridge deformation limit value, acquiring deformation data of a plurality of bridge monitoring points monitored by the GNSS positioning equipment, calculating centimeter-level deformation values of each bridge monitoring point, comparing the deformation values of the bridge monitoring points with the set deformation limit value respectively, and judging whether the deformation values of the bridge monitoring points exceed the deformation limit value or not; and if the deformation value of the over-limit monitoring point exceeds the set deformation limit value, sending a measurement instruction to the measurement robot, and sending the set sampling frequency to the triaxial inclinometer and the laser ranging integrated sensor.
The bridge deformation calculation unit is used for receiving deformation data of a new overrun monitoring point monitored by the measuring robot and deformation data of a plurality of tracks, calculating millimeter-scale deformation values of the bridge in real time according to the new deformation data of the overrun monitoring point, fusing the deformation data of the plurality of tracks, and calculating attitude data such as track inclination and distortion.
The system that this embodiment provided is through monitoring the deformation data to a plurality of bridge monitoring points to carry out fixed point to the bridge monitoring point that transfinites and measure, improve bridge deformation from centimetre level to millimeter level, and combine the orbital change value of fusion of relative change with the track absolute change.
In order to realize real-time deformation monitoring of a bridge, the method comprises the steps of monitoring deformation data of a plurality of monitoring points of the bridge in real time through CNSS positioning equipment, calculating centimeter-level deformation values of the monitoring points in real time, judging whether the deformation values exceed preset deformation limit values, monitoring the deformation data of the bridge monitoring points which are out of limit again at set frequency if the deformation values exceed the preset deformation limit values, calculating millimeter-level deformation data of the bridge in real time, collecting deformation data of a plurality of tracks at set sampling frequency, and calculating inclination and distortion conditions of the tracks in real time.
Referring to fig. 4 and 5, the method includes the following steps:
s201, setting a bridge deformation limit value, and laying a plurality of bridge monitoring points.
At the two side span beam ends of the main bridge, 1/2 spans and 1/4 spans, 1/2 spans and 3/4 spans respectively form 7 sections, and each section is provided with a measuring point at two sides and the middle, so that the total number of the bridge monitoring points is 21; 2 bridge monitoring points are respectively arranged above the two main bridge towers, and the total number of the bridge monitoring points is 4.
S202, deformation data of the bridge and the track monitored by the GNSS positioning equipment at the plurality of bridge monitoring points under the influence of environmental factors such as temperature, wind and load are obtained, and centimeter-level deformation values of the bridge monitoring points are calculated.
In this embodiment, 2 GNSS reference stations are respectively erected on two sides of a river bank where the bridge is located, and the 2 GNSS reference stations on the two sides of the river bank and GNSS positioning equipment form two classical triangular GNSS monitoring networks for integral adjustment and control, so that high-precision differential data are provided for the GNSS positioning equipment, and the accuracy of the monitoring data after calculation is ensured.
And high-precision GNSS positioning equipment is arranged in each bridge monitoring point distributed, deformation data of each monitoring point is dynamically monitored in real time through the GNSS positioning equipment, the deformation data of each monitoring point is dynamically monitored in real time through each GNSS positioning equipment, and the centimeter-level deformation value of each monitoring point is calculated. In this embodiment, to ensure centimeter-level accuracy of dynamic measurement, the GNSS positioning apparatus samples 20 Hz.
S203, comparing the deformation value of each monitoring point with a set deformation limit value respectively, and judging whether the deformation value of each monitoring point exceeds the deformation limit value or not.
And S204, if the deformation value of the monitoring point exceeds the set deformation limit value, sending a measurement instruction to a measurement robot, carrying out fixed-point tracking measurement on the over-limit monitoring point through the measurement robot, and simultaneously setting the sampling frequency of a plurality of triaxial inclinometers and laser ranging integrated sensor equipment.
Prism and CP III point are arranged on the same section, two 0.5 second high-precision measuring robots are arranged at the middle gap between the main bridge tower and the main bridge, and the measuring robots are linked with the GNSS positioning equipment, when the GNSS positioning equipment monitors that the deformation value of a certain monitoring point exceeds a set deformation limit value, the monitoring point is shown to be changed remarkably, a measuring instruction is sent to the measuring robots, the measuring robots continuously track and observe the prism at the section, and perform fixed-point tracking measurement on the monitoring point, 5 times of data acquisition are performed every second, and the deformation value of the monitoring point is improved from centimeter level to millimeter level. In the embodiment, the sampling frequency of the measuring robot can reach 5Hz per second, and the precision can reach millimeter level. The measuring robot adopts the prior art, and is not described in detail in the application.
In the embodiment, the track and the sleeper are firmly connected through a rigid body, a plurality of triaxial inclinometers and laser ranging integrated sensor devices are arranged on one side of the sleeper, three-dimensional angle change data of the sleeper are collected in real time, and a track surface height change value is calculated. The working process of the triaxial inclinometer and the laser ranging integrated sensor equipment is as follows: the three-axis inclinometer and laser ranging integrated sensor equipment is aligned to the ballast retaining wall, and the relative position change relation between the track and the bridge is analyzed by combining the three-dimensional angle change of the track and the monitoring of the bridge main body.
In this embodiment, the parameters of the three-axis inclinometer and the laser ranging integrated sensor device are as follows: angle resolution: 0.0001 degree, and the repetition precision is +/-0.0005 degree; ranging resolution: 0.1mm, repetition degree +/-0.15 mm and sampling frequency of 1Hz per second.
When the deformation value of a certain monitoring point monitored by the robot exceeds a set deformation limit value, the sampling frequency of a plurality of triaxial inclinometers and the laser ranging integrated sensor is set on line in real time, the data sampling frequency is improved, and the maximum data sampling frequency can reach 5 Hz.
S205, deformation data of the robot for fixed-point tracking measurement of the overrun monitoring point at a set frequency is obtained, and a millimeter-scale deformation value of the bridge is calculated in real time.
In this embodiment, the specific calculation method of the millimeter-scale deformation value of the bridge "includes:
and comparing the real-time measured coordinate data of the over-limit bridge monitoring point with the reference coordinate data of the bridge monitoring point to obtain a plane deformation value { [ delta ] x, [ delta ] y } and an elevation deformation value { [ delta ] z } of the bridge monitoring point.
The calculation formulas of the plane deformation value { [ delta ] x, [ delta ] y } and the elevation deformation value { [ delta ] z } of the bridge monitoring points are as follows:
△x=xn-xo；
△y=yn-yo；
△z=zn-zo。
s206, acquiring track deformation data acquired by the plurality of triaxial inclinometers and laser ranging integrated sensor devices, wherein the track deformation data comprises track three-dimensional angle change data, fusing the track three-dimensional angle change data acquired by the plurality of triaxial inclinometers and laser ranging integrated sensor devices, and calculating attitude data such as inclination and distortion of a track.
In this embodiment, the attitude data such as the inclination and the distortion of the track includes, but is not limited to, the lateral movement, the inclination, the distortion and the settlement of the track.
(1) The calculation method of the track lateral displacement comprises the following steps:
Slew=s-s0
wherein the Slew is the lateral displacement of the track and has the unit of mm; s is the track displacement acquired by laser ranging in the three-axis inclinometer and laser ranging integrated sensor equipment, and the unit is mm; s0 is a reference value of the track displacement, and the average of the s values over a period of time is taken as s 0.
(2) The calculation method of the inclination amount of the track comprises the following steps:
Cant=sin(y-y0)*L
wherein, Cant is the inclination of the track, and the unit is mm; y is the orbit Y axle angle that three-axis inclinometer and laser rangefinder integrated sensor equipment gathered, the unit: degree; y0 is a reference value of the angle of the Y axis of the track, and the average value of the Y values in a period of time is taken as Y0; l is the set gauge, unit: mm.
(3) The method for calculating the track twist comprises the following steps:
Twist=Cant(n+1)-Cant(n)
twist is the Twist of the track, and is the inclination difference of adjacent nodes, and the unit is mm; is as follows; cant (n +1) is the amount of tilt of node (n +1), and Cant (n) is the amount of tilt of node n.
(4) The calculation method of the settlement amount of the track comprises the following steps:
Settlement=sin(x-x0)*L
wherein, setting is the Settlement of the track, and the unit is: mm; x is the orbit X-axis angle that triaxial inclinometer and laser range finding integrated sensor equipment gathered, unit: degree; x0 is a reference value of the X-axis angle of the track, and the average value of X in a period of time is taken as X0; l is the set gauge, unit: mm.
The method that this embodiment provided at first monitors the deformation data of a plurality of monitoring points of bridge, and compare the deformation limit value of setting for, find out transfinite monitoring point, and measure the transfinite monitoring point fixed point, calculate bridge millimeter level deformation value according to the deformation data of the transfinite monitoring point of fixed point measurement, make bridge deformation improve to the millimeter level from the centimeter level, the position change data of the relative bridge of a plurality of tracks of collection simultaneously with certain frequency, and fuse the position change data of the relative bridge of a plurality of tracks, calculate gesture circumstances such as track slope and distortion, thereby realize the accurate monitoring to bridge deformation.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bridge deformation monitoring system, characterized by includes:
the data monitoring device is used for monitoring deformation data of a plurality of bridge monitoring points distributed on the bridge and transmitting the deformation data to the data processing device; receiving a measurement instruction and a set sampling frequency value sent by a data processing device, carrying out fixed-point tracking measurement on the over-limited bridge monitoring point at the set sampling frequency to obtain new deformation data of the over-limited bridge monitoring point, acquiring angle change data of a plurality of tracks relative to the bridge at the set sampling frequency, and respectively sending the new deformation data of the over-limited bridge monitoring point and the angle change data of the plurality of tracks relative to the bridge to the data processing device;
the data processing device is used for setting a bridge deformation limit value and a sampling frequency; acquiring deformation data of a plurality of bridge monitoring points distributed on a bridge monitored by a data monitoring device, and calculating the deformation value of each bridge monitoring point; respectively comparing the deformation value of each bridge monitoring point with the set bridge deformation limit value; if the deformation value of the bridge monitoring point exceeds the set bridge deformation limit value, sending a measurement instruction and a set sampling frequency value to a data monitoring device; acquiring new deformation data of the over-limit bridge monitoring point, which is measured by a data monitoring device at a set sampling frequency fixed point, and angle change data of a plurality of tracks relative to the bridge, which is acquired at the set sampling frequency; and calculating millimeter-scale deformation values of the bridge according to the new deformation data of the over-limit bridge monitoring points, fusing the angle change data of the plurality of tracks relative to the bridge, and calculating track inclination and distortion attitude data.
2. The bridge deformation monitoring system according to claim 1, wherein the data monitoring device comprises a plurality of GNSS positioning devices, the GNSS positioning devices are respectively arranged at monitoring points at two sides and the middle of a section at 1/2 bridge span positions at two side bridge span ends of the main bridge and a section at 1/4 bridge span, 1/2 bridge span and 3/4 bridge span positions, and at 2 monitoring points above two main bridge towers, and are used for monitoring position coordinate data of each monitoring point under the influence of atmospheric environmental factors and transmitting the position coordinate data to the data processing device.
3. The bridge deformation monitoring system according to claim 1, wherein the data monitoring device further comprises a measuring robot, and the measuring robot is used for measuring the position coordinate data of the over-limit monitoring point at a set sampling frequency and fixed point when the deformation value of the monitoring point exceeds a set deformation limit value, and transmitting the position coordinate data to the data processing device.
4. The bridge deformation monitoring system according to claim 1, wherein the data monitoring device further comprises a plurality of sensor devices arranged on one side of the sleeper, and the sensor devices are used for collecting angle change data of a plurality of tracks relative to the bridge, including track displacement, X-axis angle and Y-axis angle of each track node, at a set sampling frequency when the deformation value of the monitoring point exceeds a set deformation limit value, and transmitting the angle change data to the data processing device.
5. The bridge deformation monitoring system of claim 1, wherein the data processing device comprises:
the bridge deformation judging unit is used for acquiring position coordinate data of a plurality of monitoring points distributed on the bridge monitored by the GNSS positioning equipment, calculating the deformation value of each monitoring point, and respectively comparing the deformation value of each monitoring point with the set bridge deformation limit value;
the bridge deformation calculation unit is used for acquiring new position coordinate data of the overrun monitoring point, which is measured by the measuring robot at a set sampling frequency at a fixed point, when the deformation value of the monitoring point exceeds a set bridge deformation limit value, and calculating a millimeter-scale deformation value of the bridge according to the new position coordinate data of the overrun monitoring point;
and the track deformation calculation unit is used for acquiring angle change data of the plurality of tracks relative to the bridge, which are acquired by the plurality of sensor devices at a set sampling frequency, when the deformation value of the monitoring point exceeds a set bridge deformation limit value, fusing the angle change data of the plurality of tracks relative to the bridge, and calculating lateral shift, inclination, distortion and settlement values of the tracks.
6. A bridge deformation monitoring method is characterized by comprising the following steps:
setting a bridge deformation limit value and a sampling frequency;
acquiring deformation data of a plurality of bridge monitoring points distributed on a bridge, and calculating the deformation value of each bridge monitoring point;
respectively comparing the deformation value of each bridge monitoring point with the set bridge deformation limit value;
if the deformation value of the bridge monitoring point exceeds the set bridge deformation limit value, acquiring new deformation data of the bridge monitoring point which is measured at a set point by using the set sampling frequency and is out of limit, and acquiring angle change data of a plurality of tracks relative to the bridge by using the set sampling frequency;
calculating a millimeter-scale deformation value of the bridge according to the new deformation data of the over-limit bridge monitoring points;
and (3) fusing the angle change data of the plurality of tracks relative to the bridge, and calculating the lateral displacement, inclination, distortion and settlement values of the tracks.
7. The bridge deformation monitoring method according to claim 6, wherein the set sampling frequency is 5 Hz.
8. The bridge deformation monitoring method according to claim 6, wherein the arrangement method of the plurality of bridge monitoring points comprises the following steps:
respectively arranging a measuring point at the 1/2 span and the two sides and the middle of the cross section of the main span 1/4 span, 1/2 span and 3/4 span at the two side span beam ends of the main bridge;
and 2 monitoring points are respectively arranged above the two main bridge towers.
9. The bridge deformation monitoring method according to claim 6, wherein the deformation value of the bridge monitoring point is calculated by the following method:
and comparing the position coordinate data of the bridge monitoring points measured in real time with the set reference position coordinates of the bridge monitoring points, and calculating to obtain the plane deformation value and the elevation deformation value of the bridge monitoring points.
10. The bridge deformation monitoring method of claim 6, wherein the lateral shift, tilt, twist and settlement values of the rails are calculated by:
extracting a track displacement from the collected angle change data of the track relative to the bridge, and comparing the collected track displacement with a set track displacement reference value to calculate the displacement of the track;
extracting a Y-axis angle of each track node from the collected angle change data of the track relative to the bridge, calculating a cosine value of the Y-axis angle of each track node and a set track Y-axis angle reference value, and multiplying the obtained cosine value by a set track gauge to obtain the inclination of each track node;
comparing the inclination amounts of any two adjacent track nodes, and calculating to obtain the twist amount of the track;
extracting the x-axis angle of each track node from the collected angle change data of the track relative to the bridge, calculating the cosine value of the x-axis angle of each track node and the set reference value of the x-axis angle of the track, and multiplying the obtained cosine value by the set track gauge to obtain the settlement of the track.
Priority Applications (1)
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| CN113483810A (en) * | 2021-06-10 | 2021-10-08 | 上海铁路北斗测量工程技术有限公司 | Deformation monitoring method and system for rail on bridge |
| CN113916179A (en) * | 2021-12-15 | 2022-01-11 | 北京讯腾智慧科技股份有限公司 | Highway and railway dual-purpose bridge line shape automatic measurement system and method |
| CN114674287A (en) * | 2022-04-07 | 2022-06-28 | 重庆科技学院 | Method for monitoring vertical deformation difference of two steel rails on same cross section line of beam body |
| CN114757238A (en) * | 2022-06-15 | 2022-07-15 | 武汉地铁集团有限公司 | Method and system for monitoring deformation of subway protection area, electronic equipment and storage medium |
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| CN113916179B (en) * | 2021-12-15 | 2022-04-12 | 北京讯腾智慧科技股份有限公司 | Highway and railway dual-purpose bridge line shape automatic measurement system and method |
| CN114674287A (en) * | 2022-04-07 | 2022-06-28 | 重庆科技学院 | Method for monitoring vertical deformation difference of two steel rails on same cross section line of beam body |
| CN114757238A (en) * | 2022-06-15 | 2022-07-15 | 武汉地铁集团有限公司 | Method and system for monitoring deformation of subway protection area, electronic equipment and storage medium |
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