Time-based bridge deformation monitoring method, device, equipment and storage medium

Abstract

This invention belongs to the field of bridge monitoring technology and discloses a time-based bridge deformation monitoring method, device, equipment, and storage medium. The method includes: acquiring monitoring time information of the bridge to be monitored; determining the BeiDou monitoring time and interferometric radar monitoring time based on the monitoring time information; monitoring via BeiDou satellites based on the BeiDou monitoring time to determine BeiDou-monitored deformation information; monitoring via ground-based synthetic aperture interferometric radar based on the interferometric radar monitoring time to determine interferometric radar-monitored deformation information; and determining the deformation monitoring information of the bridge to be monitored based on the BeiDou-monitored deformation information and the interferometric radar-monitored deformation information. Through the above method, different combined monitoring methods are determined based on different BeiDou monitoring times and interferometric radar monitoring times, thereby improving the temporal resolution of bridge deformation and settlement monitoring by using BeiDou and synthetic aperture interferometric radar technologies for time-based bridge deformation monitoring.

Description

Technical Field

[0001] This invention relates to the field of bridge monitoring technology, and in particular to a time-based bridge deformation monitoring method, device, equipment, and storage medium. Background Technology

[0002] Bridges, as crucial connections in land transportation, experience heavy vehicle and pedestrian traffic, especially railway bridges. The monitoring environment is complex, and satellite signals are susceptible to interference, reducing the number of observable satellites and causing dynamic multipath effects, resulting in low positioning accuracy in real-time positioning mode. Current bridge monitoring devices include GNSS monitoring systems, which monitor deformation in easily accessible locations; deflectometers, typically installed inside the middle span of the bridge to specifically monitor deformation perpendicular to the bridge's central axis; and displacement sensors, installed on the bridge tracks and at both ends to monitor the displacement of the track slabs and the longitudinal expansion and contraction of the bridge. However, these measurements also have inherent errors. These factors reduce the accuracy and reliability of bridge deformation sequences and result in low temporal resolution. While spaceborne InSAR is also used, it is difficult to achieve high-precision, high-frequency dynamic monitoring of bridges due to factors such as satellite angle, monitoring distance, atmospheric delay, and satellite revisit period, and the temporal resolution of the monitoring points remains low.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a time-based bridge deformation monitoring method, device, equipment, and storage medium, aiming to solve the technical problem of low time resolution in existing technologies for monitoring the deformation and settlement of bridge monitoring points.

[0005] To achieve the above objectives, the present invention provides a time-based bridge deformation monitoring method, the method comprising the following steps:

[0006] Obtain the monitoring time information of the bridge to be monitored;

[0007] The BeiDou monitoring time and the interferometric radar monitoring time are determined based on the aforementioned monitoring time information.

[0008] Based on the aforementioned BeiDou monitoring time, monitoring is conducted via BeiDou satellites to determine BeiDou monitoring deformation information;

[0009] Based on the interferometric radar monitoring time, ground-based synthetic aperture interferometric radar is used for monitoring to determine the deformation information monitored by the interferometric radar.

[0010] The deformation monitoring information of the bridge to be monitored is determined based on the deformation monitoring information from the BeiDou system and the deformation monitoring information from the interferometric radar.

[0011] Optionally, the step of monitoring via BeiDou satellites according to the BeiDou monitoring time to determine BeiDou monitoring deformation information includes:

[0012] The BeiDou monitoring mode is determined based on the aforementioned BeiDou monitoring time.

[0013] According to the BeiDou monitoring mode, the bridge to be monitored is monitored by BeiDou satellites to obtain the BeiDou monitoring deformation time series;

[0014] The deformation information monitored by BeiDou was determined based on the time series of deformation monitored by BeiDou.

[0015] Optionally, the step of monitoring the bridge to be monitored via BeiDou satellites according to the BeiDou monitoring mode to obtain a BeiDou monitoring deformation time series includes:

[0016] When the BeiDou monitoring mode is a short-time static post-processing positioning mode, the interval time information and multiple monitoring points are obtained.

[0017] The interval in minutes is determined based on the interval time information;

[0018] The monitoring point is monitored by BeiDou satellite, and the coordinate information of the monitoring point is calculated every minute of the specified interval.

[0019] Obtain the reference coordinate information corresponding to the base time;

[0020] The deformation information of the monitoring point is obtained by comparing the coordinate information with the reference coordinate information.

[0021] Based on the deformation information of the monitoring points, determine the curve of deformation at each monitoring point changing over time;

[0022] The deformation time series monitored by BeiDou was determined based on the curves showing the change in deformation over time at each monitoring point.

[0023] Optionally, the step of monitoring the bridge to be monitored via BeiDou satellites according to the BeiDou monitoring mode to obtain a BeiDou monitoring deformation time series includes:

[0024] When the BeiDou monitoring mode is a short-term dynamic positioning mode, it acquires monitoring time period information and multiple monitoring points;

[0025] The monitoring duration is determined based on the monitoring period information;

[0026] The BeiDou satellites are used to monitor each monitoring point within the specified monitoring period and to obtain information on the coordinate changes of each monitoring point.

[0027] The curves of deformation at each monitoring point over time are determined based on the coordinate change information.

[0028] The cumulative high-frequency deformation time series was obtained based on the curves of deformation at each monitoring point over time.

[0029] The deformation time series monitored by BeiDou was determined based on the cumulative high-frequency deformation time series.

[0030] Optionally, the step of monitoring the bridge to be monitored via BeiDou satellites according to the BeiDou monitoring mode to obtain a BeiDou monitoring deformation time series includes:

[0031] When the BeiDou monitoring mode is a long-term dynamic monitoring mode, the cumulative monitoring duration and multiple monitoring points are obtained, and the cumulative monitoring duration is greater than 7 days;

[0032] The BeiDou satellites are used to monitor each monitoring point within the cumulative monitoring period, and the cumulative low-frequency deformation time series of each monitoring point is obtained.

[0033] The deformation time series monitored by BeiDou was determined based on the cumulative low-frequency deformation time series.

[0034] Optionally, the step of monitoring using ground-based synthetic aperture interferometry (SAR) based on the interferometric radar monitoring time to determine the interferometric radar-monitored deformation information includes:

[0035] The interferometric radar monitoring mode is determined based on the interferometric radar monitoring time.

[0036] When the interferometric radar monitoring mode is the radar short-term dynamic monitoring mode, radar monitoring time period information and multiple monitoring areas are acquired.

[0037] The radar monitoring duration is determined based on the radar monitoring period information;

[0038] The ground-based synthetic aperture interferometric radar monitors each monitoring area within the radar monitoring duration and obtains information on the changes in regional coordinates of each monitoring area.

[0039] The high-frequency deformation time series of the region is obtained based on the region coordinate change information;

[0040] Deformation information monitored by interferometric radar is determined based on the high-frequency deformation time series of the region.

[0041] Optionally, after determining the interferometric radar monitoring mode based on the interferometric radar monitoring time, the method further includes:

[0042] When the interferometric radar monitoring mode is the long-term dynamic radar monitoring mode, the cumulative radar monitoring duration and multiple monitoring areas are obtained, and the cumulative radar monitoring duration is greater than 7 days;

[0043] The ground-based synthetic aperture interferometer radar monitors each monitoring area within the cumulative radar monitoring time and obtains the regional low-frequency deformation time series of each monitoring area.

[0044] Deformation information monitored by interferometric radar is determined based on the low-frequency deformation time series of the region.

[0045] Furthermore, to achieve the above objectives, the present invention also proposes a time-based bridge deformation monitoring device, the time-based bridge deformation monitoring device comprising:

[0046] The information acquisition module is used to acquire the monitoring time information of the bridge to be monitored;

[0047] The time determination module is used to determine the BeiDou monitoring time and the interferometric radar monitoring time based on the monitoring time information.

[0048] The BeiDou monitoring module is used to monitor via BeiDou satellites according to the BeiDou monitoring time to determine BeiDou monitoring deformation information;

[0049] An interferometric radar monitoring module is used to monitor the ground-based synthetic aperture interferometric radar according to the interferometric radar monitoring time in order to determine the interferometric radar monitoring deformation information.

[0050] The data processing module is used to determine the deformation monitoring information of the bridge to be monitored based on the deformation monitoring information from the BeiDou system and the deformation monitoring information from the interferometric radar.

[0051] Furthermore, to achieve the above objectives, the present invention also proposes a time-based bridge deformation monitoring device, which includes: a memory, a processor, and a time-based bridge deformation monitoring program stored in the memory and executable on the processor. The time-based bridge deformation monitoring program is configured to implement the steps of the time-based bridge deformation monitoring method described above.

[0052] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium storing a time-based bridge deformation monitoring program, which, when executed by a processor, implements the steps of the time-based bridge deformation monitoring method described above.

[0053] This invention acquires monitoring time information of the bridge to be monitored; determines the BeiDou monitoring time and interferometric radar monitoring time based on the monitoring time information; monitors the bridge using BeiDou satellites based on the BeiDou monitoring time to determine BeiDou-monitored deformation information; monitors the bridge using ground-based synthetic aperture interferometric radar based on the interferometric radar monitoring time to determine interferometric radar-monitored deformation information; and determines the deformation monitoring information of the bridge based on the BeiDou-monitored deformation information and the interferometric radar-monitored deformation information. In this way, different combined monitoring methods are determined based on different BeiDou monitoring times and interferometric radar monitoring times, thereby improving the temporal resolution of bridge deformation and settlement monitoring through BeiDou and synthetic aperture interferometric radar technologies. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of a time-based bridge deformation monitoring device in the hardware operating environment involved in the embodiments of the present invention;

[0055] Figure 2 This is a flowchart illustrating the first embodiment of the time-based bridge deformation monitoring method of the present invention.

[0056] Figure 3 This is a schematic diagram of the execution main system architecture in one embodiment of the time-based bridge deformation monitoring method of the present invention;

[0057] Figure 4 This is a schematic diagram of the deformation monitoring information technology route in one embodiment of the time-based bridge deformation monitoring method of the present invention;

[0058] Figure 5 This is a flowchart illustrating the second embodiment of the time-based bridge deformation monitoring method of the present invention.

[0059] Figure 6 This is a structural block diagram of the first embodiment of the time-based bridge deformation monitoring device of the present invention.

[0060] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0061] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0062] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a time-based bridge deformation monitoring device in the hardware operating environment of an embodiment of the present invention.

[0063] like Figure 1As shown, the time-based bridge deformation monitoring device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0064] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on time-based bridge deformation monitoring equipment and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0065] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a time-based bridge deformation monitoring program.

[0066] exist Figure 1 In the time-based bridge deformation monitoring device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the time-based bridge deformation monitoring device of the present invention can be set in the time-based bridge deformation monitoring device, and the time-based bridge deformation monitoring device calls the time-based bridge deformation monitoring program stored in the memory 1005 through the processor 1001 and executes the time-based bridge deformation monitoring method provided in the embodiment of the present invention.

[0067] This invention provides a time-based bridge deformation monitoring method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of a time-based bridge deformation monitoring method according to the present invention.

[0068] In this embodiment, the time-based bridge deformation monitoring method includes the following steps:

[0069] Step S10: Obtain the monitoring time information of the bridge to be monitored.

[0070] It should be noted that the executing entity in this embodiment is a system or server used to control a time-based bridge deformation monitoring method, and the system architecture is as follows: Figure 3 As shown, or other devices that can achieve this function, this embodiment does not limit them.

[0071] It should be understood that current bridge deformation and settlement monitoring is achieved by installing hardware detectors or by using spaceborne InSAR technology. However, this is difficult to achieve high-precision, high-frequency dynamic monitoring of bridges due to factors such as satellite angle, monitoring distance, atmospheric delay, and satellite revisit period. The time resolution of the monitoring points is also low. The solution in this embodiment determines different combined monitoring methods based on different BeiDou monitoring times and interferometric radar monitoring times. This allows for time-based bridge deformation monitoring using BeiDou and ground-based synthetic aperture interferometric radar technology, thereby improving the time resolution of bridge deformation and settlement monitoring.

[0072] It should be noted that the monitoring time information refers to the pre-set monitoring time period for the bridge to be monitored using BeiDou and ground-based synthetic aperture interferometry radar technologies, as well as the time settings for data collection.

[0073] Step S20: Determine the BeiDou monitoring time and the interferometric radar monitoring time based on the monitoring time information.

[0074] In practice, the BeiDou monitoring time and the interferometric radar monitoring time refer to the time set separately for the BeiDou satellite and the synthetic aperture interferometric radar technology in terms of monitoring time and the entire monitoring cycle.

[0075] Step S30: Monitor the BeiDou satellite according to the BeiDou monitoring time to determine the BeiDou monitoring deformation information.

[0076] It should be noted that monitoring via BeiDou satellites based on BeiDou monitoring time refers to first determining the BeiDou monitoring mode based on the BeiDou monitoring time, and then monitoring through different BeiDou monitoring modes to obtain BeiDou monitoring deformation information corresponding to different time modes.

[0077] Step S40: Based on the interferometric radar monitoring time, monitor using ground-based synthetic aperture interferometric radar to determine the deformation information monitored by the interferometric radar.

[0078] It should be understood that the monitoring modes of ground-based synthetic aperture interferometric radar are divided into short-term dynamic monitoring mode and long-term dynamic monitoring mode, which can monitor and calculate the interferometric radar monitoring deformation information of different time spans and types.

[0079] Furthermore, in order to accurately obtain the interferometric radar deformation information, step S40 includes: determining the interferometric radar monitoring mode based on the interferometric radar monitoring time; when the interferometric radar monitoring mode is the radar short-term dynamic monitoring mode, acquiring radar monitoring time period information and multiple monitoring areas; determining the radar monitoring duration based on the radar monitoring time period information; monitoring each monitoring area within the radar monitoring duration using a ground-based synthetic aperture interferometric radar, and acquiring regional coordinate change information for each monitoring area; obtaining a regional high-frequency deformation time series based on the regional coordinate change information; and determining the interferometric radar monitoring deformation information based on the regional high-frequency deformation time series.

[0080] In practical implementation, the interferometric radar monitoring mode is first determined based on the interferometric radar monitoring time. When the interferometric radar monitoring time is within 0 to 2 days of data, the interferometric radar monitoring mode is determined to be the short-term dynamic radar monitoring mode. At this time, the pre-set radar monitoring time period information and monitoring area are first determined. The radar monitoring time period information refers to the time period during which radar monitoring is used and the duration of the time period. The monitoring area refers to an area of ​​any size and shape on or near the bridge to be monitored; this embodiment does not impose any restrictions on this.

[0081] It should be noted that determining the radar monitoring duration based on the radar monitoring period information refers to the duration of continuous data collection determined based on the radar monitoring period information.

[0082] It should be understood that once the radar monitoring duration is determined, the short-term dynamic monitoring method based on the short-term high-frequency dynamic positioning method uses observation data over a short period of time (about one day) and uses real-time positioning to calculate the coordinates of most of the bridge's location within the monitoring range as regional coordinate change information to obtain the accumulated high-frequency deformation time series. This is used to capture the instantaneous deformation of the bridge monitoring area, thereby obtaining the deformation information monitored by the interferometric radar.

[0083] In this way, continuous data monitoring of deformation across most areas of the bridge is achieved throughout the entire time.

[0084] Furthermore, in order to monitor the daily periodic deformation of the area of ​​the bridge to be monitored, after determining the interferometric radar monitoring mode based on the interferometric radar monitoring time, the method further includes: when the interferometric radar monitoring mode is a long-term dynamic radar monitoring mode, acquiring the cumulative radar monitoring duration and multiple monitoring areas, wherein the cumulative radar monitoring duration is greater than 7 days; monitoring each monitoring area within the cumulative radar monitoring duration using a ground-based synthetic aperture interferometric radar, and acquiring the regional low-frequency deformation time series of each monitoring area; and determining the interferometric radar monitoring deformation information based on the regional low-frequency deformation time series.

[0085] In practice, the cumulative duration of radar monitoring can be any preset duration, but it must be greater than 7 days.

[0086] It should be noted that the long-term dynamic monitoring mode of radar based on the long-term low-frequency dynamic positioning method uses long-term (at least 7 days) observation data and real-time positioning to calculate the coordinates of a region as a low-frequency deformation time series of the region. This is used to analyze the amplitude of the daily periodic deformation of the bridge monitoring area, and then the deformation information monitored by interferometric radar is determined based on the amplitude of the daily periodic deformation of the bridge monitoring area.

[0087] In this way, the daily periodic deformation amplitude of the monitoring area of ​​the bridge under test can be continuously monitored over a long period of time, making it possible to analyze the deformation of the bridge under test within the daily period.

[0088] Step S50: Determine the deformation monitoring information of the bridge to be monitored based on the deformation monitoring information from Beidou and the deformation monitoring information from interferometric radar.

[0089] It should be understood that, as Figure 4 The technical roadmap shown illustrates that the calculated deformation monitoring information is processed by the deformation information processing subsystem. The BDS processing module calculates the deformation at the bridge's BDS monitoring points. Furthermore, based on short-term raw observation data from the monitoring points, it calculates short-term precise deformation time series for key monitoring points. This is used to detect the deformation of the BDS monitoring points and their natural frequencies at the instant a train passes over the bridge within a short period. Based on long-term raw observation data from key monitoring points, it calculates long-term precise deformation time series for calculating the periodic motion amplitude of the monitoring points. Detailed functions of the BDS processing module are described below:

[0090] ① Calculate the deformation of the bridge's BDS monitoring points. The BDS processing module pre-stores the initial coordinates of the monitoring points. When receiving the BDS monitoring point coordinate information from the communication module, the BDS processing module finds the corresponding initial coordinates of the monitoring point based on the monitoring point name in the coordinate information. Then, it calculates the difference between the initial coordinates and the coordinates in the coordinate information to obtain the deformation of the monitoring point. Finally, the deformation of the BDS monitoring point, along with the corresponding time and the monitoring point name, is input into the deformation information storage module.

[0091] ② Calculate long-term and short-term precise deformation time series for key monitoring points. This function utilizes BDS precise satellite ephemeris files, satellite clock bias files, and raw observation data to calculate short-term high-frequency and long-term deformation time series. Specific functions include:

[0092] A. According to the preset time interval, the raw observation data request information of the monitoring point is periodically input into the communication module. The request information includes the preset key monitoring point name, the start time of the raw observation data and the data duration, of which the data duration is at least one week.

[0093] B. Receive data input from the communication module. This includes raw observation data from monitoring points and reference stations, precise ephemeris and satellite clock bias, and reference station coordinates. Convert the raw observation data to a format compatible with Rinex 3.2 or later as long-term raw observation data, and then extract the data for the first day from the long-term raw observation data as short-term raw observation data.

[0094] C. The BDS processing module uses long-term raw observation data, precise ephemeris and satellite clock bias, and reference station coordinates to calculate the coordinates of monitoring points in a real-time dynamic positioning mode, with an interval of at least 1 minute between calculations of two adjacent coordinates. The coordinates of the monitoring points are arranged in chronological order of calculation to obtain the long-term precise BDS coordinate time series of the monitoring points. The difference between the long-term precise BDS coordinate time series and the initial coordinates of the monitoring points is calculated to obtain the long-term precise deformation time series of the monitoring points. Finally, the BDS processing module inputs the long-term precise deformation time series of the monitoring points into a deformation information noise filter.

[0095] The BDS processing module uses short-term raw observation data, precise ephemeris and satellite clock bias, and reference station coordinates to calculate the coordinates of the monitoring points in a real-time dynamic positioning mode. The sampling frequency is the same as that of the raw observation data. The coordinates of the monitoring points are arranged in chronological order of calculation to obtain the BDS short-term precise coordinate time series of the monitoring points. The difference between the BDS short-term precise coordinate time series of the monitoring points and the initial coordinates of the monitoring points is calculated to obtain the short-term precise deformation time series of the monitoring points. Finally, the BDS processing module inputs the short-term precise deformation time series of the monitoring points into the deformation information noise filter.

[0096] The deformation information noise filter is used to reduce noise in the input deformation time series of monitoring points. For the input long-term precise deformation time series of BDS and long-term deformation time series of GBInSAR, the noise in the deformation time series includes white noise and colored noise. The power of colored noise is concentrated in the low frequency, while the power of white noise is concentrated in the high frequency. Based on the power difference between white noise and colored noise, the deformation information noise filter uses different techniques to process white noise and colored noise. For the input long-term deformation time series, the deformation information noise filter first uses the three-fold mean square error method to detect gross errors in the deformation time series, and then uses linear interpolation to interpolate the deformation data at the corresponding time after removing gross errors, maintaining the integrity of the deformation time series. Then, curve fitting is performed on the deformation time series to obtain the curve fitting residuals of the corresponding deformation time series. On this basis, wavelet threshold denoising is used to reduce white noise in the curve fitting residuals, while the remaining curve fitting residuals still contain colored noise. Then, for the BDS curve fitting residuals of the monitoring points after reducing white noise, power spectrum principal component analysis is used to reduce the colored noise. For the GBInSAR curve fitting residuals after reducing white noise, the wavelet information entropy method is used to reduce the colored noise. Finally, the curve fitting residual sequences after reducing white and colored noise are added to the curve to obtain the filtered long-term precise deformation time series of BDS monitoring points and the long-term deformation time series of GBInSAR, which are then input into the deformation information estimation module.

[0097] The input BDS short-term precise deformation time series and GBInSAR short-term deformation time series are used to capture the instantaneous deformation of the bridge monitoring points, but not to estimate the periodic deformation of the monitoring points. Therefore, the deformation information noise filter only performs wavelet threshold denoising on these two types of deformation time series, and then inputs the filtered deformation time series into the deformation information storage module.

[0098] The formula for observing deformed time series is:

[0099] ;in, Indicates in The amount of deformation observed at any given time. The unit is day. , where n represents the number of data points in the deformed time series. This indicates the initial deformation amount within the time range covered by the deformation time series. Indicates linear deformation rate, and The coefficients of the trigonometric function representing the daily periodic deformation of the monitoring point are... express Noise at any given moment. In the above formula, ( ) represents the linear deformation term of the deformation time series, ( ) represents the daily periodic deformation term in the deformed time series.

[0100] It should be understood that, since this invention only focuses on the diurnal periodic deformation of the bridge's BDS monitoring points, and the linear motion of the monitoring points is relatively weak, the deformation information estimation module removes the linear deformation term from the deformation time series before calculating the diurnal periodic deformation amplitude. The remaining deformation time series contains the diurnal periodic deformation information of the monitoring points. At this point, the observation equation for the deformation time series is:

[0101]

[0102]

[0103] Parameter to be estimated: X=[ , Since the colored noise has been significantly reduced in the deformed information noise filter, it can be assumed that only white noise remains in the noise of the deformed time series, and the least squares formula can be directly applied. Y, calculated and And then according to The amplitude of the daily periodic deformation at the monitoring points is calculated, and then the deformation monitoring information is summarized. Finally, the deformation information estimation module inputs the results, along with the corresponding monitoring points and monitoring directions, into the deformation information storage module.

[0104] In practical implementation, the deformation information storage module stores all deformation monitoring information generated by the system for user retrieval. The deformation monitoring information is stored in three categories, as detailed below: ① Deformation Time Series: The deformation information storage module receives and stores the monitoring point names, deformation amounts, and corresponding times continuously input by the data processing module. Through long-term accumulation, a deformation time series of the monitoring points is formed. Furthermore, the deformation information storage module receives and stores the filtered deformation time series input by the deformation information noise filter, including the filtered short-term precise deformation time series of the monitoring points and the short-term deformation time series of the GBInSAR monitoring points. ② Periodic Deformation Amplitude: The deformation information storage module receives and stores the daily periodic deformation amplitude of the bridge's BDS and GBInSA monitoring points input by the deformation prediction module. ③ Settlement Information Around the Bridge: The deformation information storage module receives and stores graphics representing large-scale settlement information around the bridge input by the communication module.

[0105] This embodiment acquires the monitoring time information of the bridge to be monitored; determines the BeiDou monitoring time and interferometric radar monitoring time based on the monitoring time information; monitors the bridge using BeiDou satellites based on the BeiDou monitoring time to determine BeiDou-monitored deformation information; monitors the bridge using ground-based synthetic aperture interferometric radar based on the interferometric radar monitoring time to determine interferometric radar-monitored deformation information; and determines the deformation monitoring information of the bridge based on the BeiDou-monitored deformation information and the interferometric radar-monitored deformation information. In this way, different combined monitoring methods are determined based on different BeiDou monitoring times and interferometric radar monitoring times, thereby improving the temporal resolution of bridge deformation and settlement monitoring through BeiDou and synthetic aperture interferometric radar technologies.

[0106] refer to Figure 5 , Figure 5 This is a flowchart illustrating a second embodiment of a time-based bridge deformation monitoring method according to the present invention.

[0107] Based on the first embodiment described above, the time-based bridge deformation monitoring method of this embodiment includes the following in step S30:

[0108] Step S301: Determine the BeiDou monitoring mode based on the BeiDou monitoring time.

[0109] It should be noted that the BeiDou monitoring mode includes three types: short-term static post-processing positioning mode, short-term dynamic positioning mode, and long-term dynamic monitoring mode. These correspond to the monitoring time period of BeiDou. When the period is several minutes, it is the short-term static post-processing positioning mode; when the period is within one week, it is the short-term dynamic positioning mode; and when the period exceeds 7 days, it is the long-term dynamic monitoring mode.

[0110] Step S302: According to the BeiDou monitoring mode, the bridge to be monitored is monitored by BeiDou satellites to obtain the BeiDou monitoring deformation time series.

[0111] It should be understood that when different BeiDou monitoring modes are determined, the bridges to be monitored are monitored in different ways.

[0112] Furthermore, in order to monitor in minutes, step S302 includes: when the BeiDou monitoring mode is a short-time static post-processing positioning mode, acquiring interval time information and multiple monitoring points; determining the interval in minutes based on the interval time information; monitoring the monitoring points via BeiDou satellites and calculating the coordinate information of the monitoring points at each interval in minutes; acquiring reference coordinate information corresponding to the reference time; comparing the coordinate information with the reference coordinate information to obtain the deformation information of the monitoring points; determining the curve of deformation of each monitoring point changing with time based on the deformation information of the monitoring points; and determining the BeiDou monitoring deformation time sequence based on the curve of deformation of each monitoring point changing with time.

[0113] In practical implementation, when the BeiDou monitoring mode is determined to be the static post-processing positioning mode, the pre-set interval time information is first obtained, and multiple monitoring points corresponding to different parts of the bridge to be monitored are identified. The interval time information refers to the interval time for calculating the coordinates.

[0114] It should be noted that the interval in minutes refers to the cumulative calculation of the coordinates of the clearing monitoring points, in minutes.

[0115] It should be noted that monitoring the monitoring points via BeiDou satellites and calculating the coordinate information of the monitoring points at intervals of minutes means: continuously monitoring the deformation and displacement of the monitoring points via BeiDou satellites, and then calculating and recording the coordinates of the monitoring points at intervals of minutes. For example, when the interval is 10 minutes, the coordinates of each monitoring point are calculated every 10 minutes.

[0116] It should be understood that obtaining the reference coordinate information corresponding to the benchmark time means: first, selecting a benchmark time, using the coordinates of each monitoring point at the benchmark time as reference coordinates, and summarizing them to obtain the reference coordinate information.

[0117] In practical implementation, comparing the coordinate information with the reference coordinate information to obtain the deformation information of the monitoring point means: comparing the coordinate information of each monitoring point with the reference coordinate information to determine the offset value of the monitoring point's coordinates relative to the reference coordinates at each time point. Then, based on the offset value, a curve showing the deformation amount changing over time can be obtained, and finally, a BeiDou monitoring deformation time series is obtained based on the curves showing the deformation amount changing over time at each monitoring point.

[0118] In this way, continuous long-term deformation monitoring of the bridge under monitoring can be achieved on a minute-by-minute basis.

[0119] Furthermore, in order to achieve short-term continuous monitoring of bridge deformation, step S302 includes: when the BeiDou monitoring mode is a short-term dynamic positioning mode, acquiring monitoring period information and multiple monitoring points; determining the monitoring duration based on the monitoring period information; monitoring each monitoring point within the monitoring duration using BeiDou satellites and acquiring coordinate change information for each monitoring point; determining the deformation amount of each monitoring point over time based on the coordinate change information; obtaining a cumulative high-frequency deformation time series based on the deformation amount of each monitoring point over time; and determining the BeiDou monitoring deformation time series based on the cumulative high-frequency deformation time series.

[0120] It should be noted that the monitoring period information refers to the length of time for continuous monitoring of the bridge to be monitored, which is the monitoring duration, and can be a time range of 0 to 2 days.

[0121] It should be understood that once the monitoring duration is determined, deformation monitoring of the bridge to be monitored is continuously carried out, thereby detecting the coordinate change values ​​of each monitoring point and recording them as coordinate change information. Then, based on the coordinate change information, the curve of the deformation of each monitoring point over time is plotted, thereby obtaining a continuous cumulative high-frequency deformation time series. Finally, the cumulative high-frequency deformation time series is stored as a BeiDou monitoring deformation time series.

[0122] In this way, high-frequency monitoring of the deformation of the bridge under monitoring can be achieved in a short period of time.

[0123] Furthermore, in order to achieve long-term deformation and settlement monitoring, step S302 includes: when the BeiDou monitoring mode is a long-term dynamic monitoring mode, acquiring the cumulative monitoring duration and multiple monitoring points, wherein the cumulative monitoring duration is greater than 7 days; monitoring each monitoring point within the cumulative monitoring duration using BeiDou satellites, and acquiring the cumulative low-frequency deformation time series of each monitoring point; and determining the BeiDou monitoring deformation time series based on the cumulative low-frequency deformation time series.

[0124] In specific implementation, when the BeiDou monitoring mode is determined to be a long-term dynamic monitoring mode, the user-set cumulative monitoring duration is first obtained. Here, the cumulative monitoring duration is greater than seven days (it can be any duration greater than seven days). Then, monitoring is continuously carried out within the cumulative monitoring duration, so that the coordinates of all monitoring points within the cumulative monitoring duration are calculated, thereby determining the value of deformation change over time, thus forming a cumulative low-frequency deformation time series. The cumulative low-frequency deformation time series is then stored as the BeiDou monitoring deformation time series.

[0125] In this way, the amplitude of the daily periodic deformation of the bridge monitoring points can be analyzed.

[0126] Step S303: Determine the BeiDou monitoring deformation information based on the BeiDou monitoring deformation time series.

[0127] It should be noted that the deformation information monitored by BeiDou is obtained based on the deformation time series monitored by BeiDou, including but not limited to the deformation amount of each monitoring point over time, as well as the data and distance information of the overall deformation and settlement of the bridge and the surrounding area.

[0128] This embodiment determines the BeiDou monitoring mode based on the BeiDou monitoring time; monitors the bridge under test using BeiDou satellites according to the BeiDou monitoring mode to obtain a BeiDou monitoring deformation time series; and determines the BeiDou monitoring deformation information based on the BeiDou monitoring deformation time series. In this way, different detection modes are set according to different BeiDou monitoring times, enabling deformation monitoring in various ways, from short-term to long-term, from static to dynamic, and from low-frequency to high-frequency, thus improving the temporal resolution of bridge deformation monitoring.

[0129] Furthermore, this embodiment of the invention also proposes a storage medium storing a time-based bridge deformation monitoring program, which, when executed by a processor, implements the steps of the time-based bridge deformation monitoring method described above.

[0130] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0131] Reference Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the time-based bridge deformation monitoring device of the present invention.

[0132] like Figure 6 As shown, the time-based bridge deformation monitoring device proposed in this embodiment of the invention includes:

[0133] The information acquisition module 10 is used to acquire the monitoring time information of the bridge to be monitored.

[0134] The time determination module 20 is used to determine the BeiDou monitoring time and the interferometric radar monitoring time based on the monitoring time information.

[0135] The BeiDou monitoring module 30 is used to monitor via BeiDou satellites according to the BeiDou monitoring time to determine BeiDou monitoring deformation information.

[0136] Interferometric radar monitoring module 40 is used to monitor the ground-based synthetic aperture interferometric radar according to the interferometric radar monitoring time in order to determine the interferometric radar monitoring deformation information.

[0137] The data processing module 50 is used to determine the deformation monitoring information of the bridge to be monitored based on the deformation monitoring information from the BeiDou system and the deformation monitoring information from the interferometric radar.

[0138] This embodiment acquires the monitoring time information of the bridge to be monitored; determines the BeiDou monitoring time and interferometric radar monitoring time based on the monitoring time information; monitors the bridge using BeiDou satellites based on the BeiDou monitoring time to determine BeiDou-monitored deformation information; monitors the bridge using ground-based synthetic aperture interferometric radar based on the interferometric radar monitoring time to determine interferometric radar-monitored deformation information; and determines the deformation monitoring information of the bridge based on the BeiDou-monitored deformation information and the interferometric radar-monitored deformation information. In this way, different combined monitoring methods are determined based on different BeiDou monitoring times and interferometric radar monitoring times, thereby improving the temporal resolution of bridge deformation and settlement monitoring through BeiDou and synthetic aperture interferometric radar technologies.

[0139] In one embodiment, the BeiDou monitoring module 30 is further configured to determine the BeiDou monitoring mode based on the BeiDou monitoring time; monitor the bridge to be monitored via BeiDou satellites according to the BeiDou monitoring mode to obtain a BeiDou monitoring deformation time series; and determine BeiDou monitoring deformation information based on the BeiDou monitoring deformation time series.

[0140] In one embodiment, the BeiDou monitoring module 30 is further configured to: acquire interval time information and multiple monitoring points when the BeiDou monitoring mode is a short-time static post-processing positioning mode; determine the interval in minutes based on the interval time information; monitor the monitoring points via BeiDou satellites and calculate the coordinate information of the monitoring points at each interval in minutes; acquire reference coordinate information corresponding to the reference time; compare the coordinate information with the reference coordinate information to obtain the deformation information of the monitoring points; determine the curve of deformation of each monitoring point changing with time based on the deformation information of the monitoring points; and determine the BeiDou monitoring deformation time sequence based on the curve of deformation of each monitoring point changing with time.

[0141] In one embodiment, the BeiDou monitoring module 30 is further configured to: acquire monitoring period information and multiple monitoring points when the BeiDou monitoring mode is a short-term dynamic positioning mode; determine the monitoring duration based on the monitoring period information; monitor each monitoring point within the monitoring duration using BeiDou satellites and acquire coordinate change information of each monitoring point; determine the curve of deformation of each monitoring point over time based on the coordinate change information; obtain a cumulative high-frequency deformation time series based on the curve of deformation of each monitoring point over time; and determine the BeiDou monitoring deformation time series based on the cumulative high-frequency deformation time series.

[0142] In one embodiment, the BeiDou monitoring module 30 is further configured to, when the BeiDou monitoring mode is a long-term dynamic monitoring mode, acquire the cumulative monitoring duration and multiple monitoring points, wherein the cumulative monitoring duration is greater than 7 days; monitor each monitoring point within the cumulative monitoring duration using BeiDou satellites, and acquire the cumulative low-frequency deformation time series of each monitoring point; and determine the BeiDou monitoring deformation time series based on the cumulative low-frequency deformation time series.

[0143] In one embodiment, the interferometric radar monitoring module 40 is further configured to determine the interferometric radar monitoring mode based on the interferometric radar monitoring time; when the interferometric radar monitoring mode is a short-term dynamic radar monitoring mode, acquire radar monitoring time period information and multiple monitoring areas; determine the radar monitoring duration based on the radar monitoring time period information; monitor each monitoring area within the radar monitoring duration using a ground-based synthetic aperture interferometric radar, and acquire regional coordinate change information for each monitoring area; obtain a regional high-frequency deformation time series based on the regional coordinate change information; and determine the interferometric radar monitoring deformation information based on the regional high-frequency deformation time series.

[0144] In one embodiment, the interferometric radar monitoring module 40 is further configured to, when the interferometric radar monitoring mode is a long-term dynamic radar monitoring mode, acquire the cumulative radar monitoring duration and multiple monitoring areas, wherein the cumulative radar monitoring duration is greater than 7 days; monitor each monitoring area within the cumulative radar monitoring duration using a ground-based synthetic aperture interferometric radar, and acquire the regional low-frequency deformation time series of each monitoring area; and determine the interferometric radar monitoring deformation information based on the regional low-frequency deformation time series.

[0145] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solution of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0146] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0147] In addition, for technical details not described in detail in this embodiment, please refer to the time-based bridge deformation monitoring method provided in any embodiment of the present invention, which will not be repeated here.

[0148] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0149] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0150] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0151] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A time-based bridge deformation monitoring method, characterized in that, The time-based bridge deformation monitoring method includes: Obtain the monitoring time information of the bridge to be monitored; The BeiDou monitoring time and the interferometric radar monitoring time are determined based on the aforementioned monitoring time information. The BeiDou monitoring mode is determined based on the BeiDou monitoring time. The BeiDou monitoring modes include: short-time static post-processing positioning mode, short-term dynamic positioning mode, and long-term dynamic monitoring mode. According to the BeiDou monitoring mode, the bridge to be monitored is monitored by BeiDou satellites to obtain the BeiDou monitoring deformation time series; The deformation information monitored by BeiDou was determined based on the aforementioned deformation monitoring time series. Based on the interferometric radar monitoring time, ground-based synthetic aperture interferometric radar is used for monitoring to determine the deformation information monitored by the interferometric radar. The deformation monitoring information of the bridge to be monitored is determined based on the deformation monitoring information from the BeiDou system and the deformation monitoring information from the interferometric radar. The step of monitoring using ground-based synthetic aperture interferometry (SAR) based on the interferometric radar monitoring time to determine the deformation information monitored by the interferometric radar includes: The interferometric radar monitoring mode is determined based on the interferometric radar monitoring time. When the interferometric radar monitoring mode is the radar short-term dynamic monitoring mode, radar monitoring time period information and multiple monitoring areas are acquired. The radar monitoring duration is determined based on the radar monitoring period information; The ground-based synthetic aperture interferometric radar monitors each monitoring area within the radar monitoring duration and obtains information on the changes in regional coordinates of each monitoring area. The high-frequency deformation time series of the region is obtained based on the region coordinate change information; Deformation information monitored by interferometric radar is determined based on the high-frequency deformation time series of the region.

2. The method as described in claim 1, characterized in that, The step of monitoring the bridge under test using BeiDou satellites according to the BeiDou monitoring mode to obtain the BeiDou monitoring deformation time series includes: When the BeiDou monitoring mode is a short-time static post-processing positioning mode, the interval time information and multiple monitoring points are obtained. The interval in minutes is determined based on the interval time information; The monitoring point is monitored by BeiDou satellite, and the coordinate information of the monitoring point is calculated every minute of the specified interval. Obtain the reference coordinate information corresponding to the base time; The deformation information of the monitoring point is obtained by comparing the coordinate information with the reference coordinate information. Based on the deformation information of the monitoring points, determine the curve of deformation at each monitoring point changing over time; The deformation time series monitored by BeiDou was determined based on the curves showing the change in deformation over time at each monitoring point.

3. The method as described in claim 1, characterized in that, The step of monitoring the bridge under test using BeiDou satellites according to the BeiDou monitoring mode to obtain the BeiDou monitoring deformation time series includes: When the BeiDou monitoring mode is a short-term dynamic positioning mode, it acquires monitoring time period information and multiple monitoring points; The monitoring duration is determined based on the monitoring period information; The BeiDou satellites are used to monitor each monitoring point within the specified monitoring period and to obtain information on the coordinate changes of each monitoring point. The curves of deformation at each monitoring point over time are determined based on the coordinate change information. The cumulative high-frequency deformation time series was obtained based on the curves of deformation at each monitoring point over time. The deformation time series monitored by BeiDou was determined based on the cumulative high-frequency deformation time series.

4. The method as described in claim 1, characterized in that, The step of monitoring the bridge under test using BeiDou satellites according to the BeiDou monitoring mode to obtain the BeiDou monitoring deformation time series includes: When the BeiDou monitoring mode is a long-term dynamic monitoring mode, the cumulative monitoring duration and multiple monitoring points are obtained, and the cumulative monitoring duration is greater than 7 days; The BeiDou satellites are used to monitor each monitoring point within the cumulative monitoring period, and the cumulative low-frequency deformation time series of each monitoring point is obtained. The deformation time series monitored by BeiDou was determined based on the cumulative low-frequency deformation time series.

5. The method as described in claim 1, characterized in that, After determining the interferometric radar monitoring mode based on the interferometric radar monitoring time, the method further includes: When the interferometric radar monitoring mode is the long-term dynamic radar monitoring mode, the cumulative radar monitoring duration and multiple monitoring areas are obtained, and the cumulative radar monitoring duration is greater than 7 days; The ground-based synthetic aperture interferometer radar monitors each monitoring area within the cumulative radar monitoring time and obtains the regional low-frequency deformation time series of each monitoring area. Deformation information monitored by interferometric radar is determined based on the low-frequency deformation time series of the region.

6. A time-based bridge deformation monitoring device, characterized in that, The time-based bridge deformation monitoring device includes: The information acquisition module is used to acquire the monitoring time information of the bridge to be monitored; The time determination module is used to determine the BeiDou monitoring time and the interferometric radar monitoring time based on the monitoring time information. The BeiDou monitoring module is used to determine the BeiDou monitoring mode based on the BeiDou monitoring time. The BeiDou monitoring modes include: short-time static post-processing positioning mode, short-term dynamic positioning mode, and long-term dynamic monitoring mode. Based on the BeiDou monitoring mode, the module monitors the bridge to be monitored via BeiDou satellites to obtain a BeiDou monitoring deformation time series. Based on the BeiDou monitoring deformation time series, the module determines the BeiDou monitoring deformation information. An interferometric radar monitoring module is used to monitor the ground-based synthetic aperture interferometric radar according to the interferometric radar monitoring time in order to determine the interferometric radar monitoring deformation information. The data processing module is used to determine the deformation monitoring information of the bridge to be monitored based on the deformation monitoring information from the BeiDou system and the deformation monitoring information from the interferometric radar. The interferometric radar monitoring module is further configured to determine the interferometric radar monitoring mode based on the interferometric radar monitoring time; when the interferometric radar monitoring mode is a short-term dynamic radar monitoring mode, acquire radar monitoring time period information and multiple monitoring areas; determine the radar monitoring duration based on the radar monitoring time period information; monitor each monitoring area within the radar monitoring duration using a ground-based synthetic aperture interferometric radar, and acquire regional coordinate change information for each monitoring area; obtain a regional high-frequency deformation time series based on the regional coordinate change information; and determine the interferometric radar monitoring deformation information based on the regional high-frequency deformation time series.

7. A time-based bridge deformation monitoring device, characterized in that, The device includes: a memory, a processor, and a time-based bridge deformation monitoring program stored in the memory and executable on the processor, the time-based bridge deformation monitoring program being configured to implement the time-based bridge deformation monitoring method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium stores a time-based bridge deformation monitoring program, which, when executed by a processor, implements the time-based bridge deformation monitoring method as described in any one of claims 1 to 5.

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