A method and device for processing visual displacement measurement data of dam gallery

Abstract

This invention discloses a method and device for processing visual displacement measurement data of a dam gallery, relating to the field of dam shape monitoring technology for large hydropower projects. The visual displacement measurement and analysis unit of this invention calculates the displacement values ​​of multiple target devices based on a time axis using a visual measurement method. For each monitoring point, the displacement value is calculated separately, and each displacement value represents the displacement of the corresponding target device at the monitoring point. The displacement values ​​are displayed using the corresponding monitoring point. When a threshold is exceeded, an alarm should be triggered, allowing staff to conduct timely manual analysis and handling. The visual displacement measurement device for the dam gallery adopts a bottom-mounted visual displacement monitor mode with a tethered component to reduce interference with the measurement results. The visual displacement measurement and analysis unit calculates the displacement values ​​of multiple target devices based on a time axis using a visual measurement method, enabling continuous and high-precision displacement measurement of monitoring points within the target dam gallery.

Description

Technical Field

[0001] This invention relates to the field of dam shape monitoring technology for large-scale hydropower projects, and in particular to a method and device for processing visual displacement measurement data of dam body corridors. Background Technology

[0002] Displacement monitoring within the dam gallery is of paramount importance for ensuring the safe operation of the dam. The following are some aspects of the importance of displacement monitoring:

[0003] By monitoring displacement within the corridor, potential deformations or cracks in the dam structure can be detected in a timely manner, providing early warnings for possible safety accidents and enabling corresponding measures to be taken to prevent accidents from occurring.

[0004] Displacement monitoring data is an important indicator for assessing the structural health of a dam. By analyzing this data, we can understand the structural stability and long-term performance of the dam.

[0005] The monitored data can guide the daily operation and maintenance management of the dam, such as adjusting the reservoir water level and optimizing flood discharge measures, to ensure that the dam operates within a safe range.

[0006] Monitoring and analyzing displacement within the dam gallery can provide practical operational data support for future dam design and promote improvements in design methods.

[0007] According to relevant Chinese laws, regulations, and industry standards, dams, as important water conservancy facilities, require safety monitoring, and displacement monitoring is an important component of this monitoring.

[0008] Displacement anomalies may be caused by natural disasters such as earthquakes and geological changes. Timely monitoring and analysis of this data can help prevent or mitigate the damage caused by these disasters.

[0009] Long-term monitoring of displacement within the dam gallery can analyze the long-term stability of the dam, providing a basis for developing long-term dam maintenance and management plans.

[0010] Therefore, displacement monitoring within the dam gallery is a crucial measure to ensure dam safety, prevent accidents, protect the lives and property of the people, and maintain social stability. Due to its isolation from the external environment, traditional displacement monitoring methods, such as dam monitoring stations and GPS positioning, cannot measure displacement within the gallery. Summary of the Invention

[0011] To address the aforementioned technical problems in measuring the displacement of dam gallery channels, this invention provides a method and apparatus for processing visual displacement measurement data of dam gallery channels. The technical solution adopted is as follows:

[0012] A method for processing visual displacement measurement data of a dam gallery, which uses a visual displacement measurement device to measure the displacement of the target dam gallery, includes the following steps:

[0013] Step 1: At set time intervals, the visual camera captures visual images of the target paper of the seven target devices and transmits them to the visual displacement measurement and analysis unit through the monitoring and communication unit in the corridor.

[0014] Step 2: The visual displacement measurement and analysis unit performs image preprocessing on the visual image of the target paper;

[0015] Step 3: The visual displacement measurement and analysis unit uses a feature recognition algorithm to extract the target paper feature points and the target paper feature point positions, respectively.

[0016] Step 4: Calculate the displacement of the target paper feature points based on their coordinates in the image at time t and time t+1.

[0017] Calculate the total displacement of all target paper feature points and display the total displacement of all target paper feature points on the display.

[0018] The visual displacement measurement device for the dam gallery includes multiple sets of visual displacement monitoring devices, a monitoring and communication unit within the gallery, and a visual displacement measurement and analysis unit. The visual displacement monitoring device includes a tethering component, a visual displacement monitor, a sway suppression device, and multiple sets of target devices. One end of the tethering component is fixed to the middle of the top of the inner wall of the target dam gallery, and the top center of the visual displacement monitor is tethered to the other end of the tethering component. The sway suppression device includes a gyroscope, four nozzles, and a chip-based injection controller. The gyroscope is installed at the center of the visual displacement monitor, and the four nozzles are installed on the four sides of the monitor. The injection controller communicates with the gyroscope, analyzes the gyroscope data to determine if pendulum motion exists, calculates the direction and amplitude of the sway, and controls the four nozzles to stop the pendulum motion. Multiple sets of target devices are installed around the side walls of the target dam gallery. The visual displacement monitor and the sway suppression device communicate with the visual displacement measurement and analysis unit through the monitoring and communication unit within the gallery. The visual displacement measurement and analysis unit calculates the displacement values ​​of the multiple target devices based on a time axis using a visual measurement method.

[0019] By adopting the above technical solution, in order to perform visual displacement measurement on the monitoring points on the sidewall inside the target dam gallery, a mode of mounting the visual displacement monitor at the bottom of the tether is adopted instead of directly installing it on the top or using a rigid rod installation mode. This is because when the inner wall of the target dam gallery is displaced, the center of the arch of the target dam gallery is integrated with the dam body, so the displacement is smaller, while the displacement of the sidewall is larger. The tether mode is adopted to reduce the displacement of the visual displacement monitor when displacement occurs, thereby reducing interference with the measurement results.

[0020] The mooring element can be a steel wire rope, which must not twist during natural descent;

[0021] When a large displacement occurs, the visual displacement monitor may exhibit pendulum motion under the action of the tethering device. Without intervention, the pendulum motion will continue to affect the visual measurement results. The pendulum motion is actively stopped by using the spray nozzle of the swing suppression device. The control principle is based on the data analysis of the gyroscope to determine whether a pendulum motion occurs and its direction. The spray controller controls one or two corresponding spray nozzles to spray gas to impede the pendulum motion, thereby quickly stopping the visual displacement monitor from swinging. This allows the visual displacement monitor to more accurately capture visual images of multiple target devices deployed at the monitoring points when displacement occurs in large dam areas.

[0022] The nozzle can be a miniature nozzle that can eject compressed air, or a miniature propeller can be used to achieve the same purpose;

[0023] The visual displacement measurement and analysis unit calculates the displacement values ​​of multiple target devices based on the time axis using visual measurement methods. The displacement value is calculated separately for each monitoring point, and each displacement value represents the displacement of the corresponding target device at the monitoring point. The displacement values ​​are displayed using the corresponding monitoring point. Thresholds can also be set for the displacement data of the monitoring points. When the threshold is exceeded, an alarm should be triggered so that staff can perform timely manual analysis and handling.

[0024] Optionally, in step 4, the method for calculating the displacement of the target paper feature points is:

[0025] Let the coordinates of a target feature point on the target at time t be (x, y). t y t ), at time t+1, the coordinates of the target paper feature point in the image are (x t+1 y t+1 );

[0026] Then the displacement of the feature point on the x-axis is Δx = x t+1 -x t The displacement along the y-axis is: Δy = y t+1 -y t .

[0027] Total displacement of target paper feature points

[0028] By employing the above technical solution, the displacement of each target paper feature point at different times is calculated. To improve monitoring accuracy, multiple target paper feature points can be selected, and their average displacement can be calculated.

[0029] The displacement data is analyzed to determine the stability of the corridor within the dam. If the displacement exceeds a preset threshold, an early warning is issued.

[0030] Optionally, the visual displacement monitor includes a housing, a visual camera, and a visual monitoring end wireless communication module. The top of the housing is provided with a tethering seat, which is connected to the other end of the tethering component. The visual camera, the visual monitoring end wireless communication module, and the battery pack are installed inside the housing. The shooting focus of the visual camera is located on the central axis of multiple target devices. The data output end of the visual camera is communicatively connected to the data input end of the visual monitoring end wireless communication module. The visual monitoring end wireless communication module wirelessly interacts with the visual displacement measurement and analysis unit through the monitoring communication unit in the corridor to receive the target visual images captured by the visual camera.

[0031] By adopting the above technical solution, the visual camera can continuously capture visual images of multiple target devices, and wirelessly transmit the visual images to the visual displacement measurement and analysis unit through the visual monitoring terminal wireless communication module and the corridor monitoring communication unit.

[0032] Optionally, the visual displacement monitor also includes a battery pack, which is installed inside the housing. After installation, the center of gravity of the visual displacement monitor is located on the line connecting the geometric centers of the upper and lower parts of the housing. The battery pack powers the visual camera and the wireless communication module of the visual monitoring end.

[0033] By adopting the above technical solution, the battery pack can power the visual camera and the wireless communication module of the visual monitoring end. Furthermore, by adjusting the installation position of the battery pack, the center of gravity of the visual displacement monitor can be located on the line connecting the geometric centers of the upper and lower parts of the housing, thereby further increasing the stability of the visual camera.

[0034] Optionally, the visual displacement measurement and analysis unit includes a displacement measurement and analysis end wireless communication unit, a memory, a visual analysis chip, and a data analysis chip. The displacement measurement and analysis end wireless communication unit is wirelessly connected to the visual monitoring end wireless communication module through the corridor monitoring communication unit to acquire the target visual images captured by the visual camera. The memory is communicatively connected to the data output end of the displacement measurement and analysis end wireless communication unit. The visual analysis chip and the data analysis chip are communicatively connected to the memory. The visual analysis chip calls the target visual images based on the time sequence to analyze the target displacement. The data analysis chip calculates the displacement measurement result based on the target displacement visual analysis result and stores the displacement measurement result in the memory for future reference.

[0035] By adopting the above technical solution, the visual analysis chip performs visual feature analysis on the captured target visual image, and the data analysis chip calculates the actual displacement value based on the visual analysis results.

[0036] Optionally, the visual displacement measurement and analysis unit also includes a display, which is communicatively connected to a memory for displaying displacement measurement results.

[0037] Optionally, the monitoring and communication unit within the corridor includes multiple roadway relay communication base stations. These multiple roadway relay communication base stations are arranged at equal intervals within the corridor of the target dam body. The multiple roadway relay communication base stations form a wireless communication self-organizing network. The roadway relay communication base station closer to the visual displacement monitor is wirelessly connected to the wireless communication module of the visual monitoring end, and the roadway relay communication base station closer to the visual displacement measurement and analysis unit is wirelessly connected to the wireless communication unit of the displacement measurement and analysis end.

[0038] By adopting the above technical solutions, the tunnel relay communication base station can be a relay communication base station based on wireless WIFI technology, 4G / 5G wireless communication technology, Bluetooth communication technology and other wireless communication technologies, and can realize wireless self-organizing network communication.

[0039] Optionally, the target device includes a support frame and a target plate. The support frame is detachably installed on the side wall of the target dam gallery, and the target plate is installed on the support frame. Target paper is affixed to the surface of the target plate, with the target paper facing the lens of the vision camera.

[0040] By adopting the above technical solution, the target paper on the target plate provides monitoring point features for the visual camera.

[0041] Optionally, a monitoring point is set at the arch top of the inner wall of the target dam gallery, two monitoring points are set at the arch bottom, and four monitoring points are symmetrically set at the arch waist. The number of target devices is seven, and the seven target devices are installed at the seven monitoring points on the inner wall of the target dam gallery.

[0042] By adopting the above technical solution, multiple sets of visual displacement monitoring devices can be deployed at set intervals or according to the length of straight sections within the target dam corridor. Each set of visual displacement monitoring devices uses seven target devices, which correspond to seven monitoring points, and the seven monitoring points are located on the same plane.

[0043] In summary, the present invention has at least one of the following beneficial technical effects:

[0044] This invention provides a method and device for processing visual displacement measurement data of a dam corridor. The visual displacement measurement and analysis unit calculates the displacement values ​​of multiple target devices based on a time axis using a visual measurement method. The displacement value is calculated separately for each monitoring point. Each displacement value represents the displacement of the monitoring point where the corresponding target device is located. The displacement value is displayed using the corresponding monitoring point. The displacement data of the monitoring point can also be set with a threshold. When the threshold is exceeded, an alarm should be triggered so that staff can perform timely manual analysis and handling.

[0045] The visual displacement measurement device for the dam gallery adopts a mode of mounting the visual displacement monitor at the bottom of the tethered component to reduce interference with the measurement results; the visual displacement measurement and analysis unit calculates the displacement values ​​of multiple target devices based on the time axis using visual measurement methods, and the displacement values ​​are displayed using the corresponding monitoring points; it can achieve continuous and high-precision displacement measurement of monitoring points within the target dam gallery. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the process for processing visual displacement measurement data of a dam corridor according to the present invention;

[0047] Figure 2 This is a schematic diagram of the component connection principle of the visual displacement measurement device for the dam corridor of the present invention;

[0048] Figure 3 This is a schematic diagram showing the positional relationship between the visual displacement monitor and the target device in the visual displacement measurement device for the dam corridor of the present invention.

[0049] Figure 4 This is a schematic diagram of the displacement of the target feature point from time t to time t+1 in step 4 of the present invention.

[0050] Explanation of reference numerals in the attached drawings: 11. Mooring device; 12. Visual displacement monitor; 121. Housing; 122. Visual camera; 123. Visual monitoring end wireless communication module; 124. Battery pack; 13. Swing suppression device; 131. Gyroscope; 132. Injection nozzle; 133. Injection controller; 14. Target device; 141. Support frame; 142. Target plate; 2. Tunnel relay communication base station; 31. Displacement measurement and analysis end wireless communication unit; 32. Memory; 33. Visual analysis chip; 34. Data analysis chip; 35. Display; 100. Target dam gallery. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings.

[0052] This invention discloses a method and apparatus for processing visual displacement measurement data of a dam gallery.

[0053] Reference Figure 1 - Figure 4 A method for processing visual displacement measurement data of a dam gallery, comprising the following steps: A visual displacement measurement device for a dam gallery is used to measure the displacement of the target dam gallery 100.

[0054] Step 1: At set time intervals, the visual camera 122 captures visual images of the target paper of the seven target devices 14 and transmits them to the visual displacement measurement and analysis unit 3 through the monitoring and communication unit in the corridor.

[0055] Step 2: The visual displacement measurement and analysis unit 3 performs image preprocessing on the visual image of the target paper;

[0056] Step 3: The visual displacement measurement and analysis unit 3 uses a feature recognition algorithm to extract the target paper feature points and the target paper feature point positions, respectively.

[0057] Step 4: Calculate the displacement of the target paper feature points based on their coordinates in the image at time t and time t+1.

[0058] Calculate the total displacement of all target paper feature points and display the total displacement of all target paper feature points on display 35;

[0059] The visual displacement measurement device for the dam gallery includes multiple sets of visual displacement monitoring devices, a monitoring and communication unit within the gallery, and a visual displacement measurement and analysis unit 3. The visual displacement monitoring device includes a tethering component 11, a visual displacement monitor 12, a sway suppression device 13, and multiple sets of target devices 14. One end of the tethering component 11 is fixed to the middle of the top of the inner wall of the target dam gallery 100, and the top center of the visual displacement monitor 12 is tethered to the other end of the tethering component 11. The sway suppression device 13 includes a gyroscope 131, four nozzles 132, and a chip-based injection controller 133. The gyroscope 131 is installed at the center of the visual displacement monitor 12, and the four nozzles 132... Installed on the four sides of the visual displacement monitor 12, the jet controller 133 is communicatively connected to the gyroscope 131. Based on the data from the gyroscope 131, it analyzes whether pendulum motion exists and calculates the direction and amplitude of the swing. It then controls the four jet nozzles 132 to work together to stop the visual displacement monitor 12 from swinging. Multiple target devices 14 are installed around the side walls of the target dam corridor 100. The visual displacement monitor 12 and the swing suppression device 13 are communicatively connected to the visual displacement measurement and analysis unit 3 through the monitoring and communication unit in the corridor. The visual displacement measurement and analysis unit 3 calculates the displacement values ​​of the multiple target devices 14 based on the time axis using a visual measurement method.

[0060] In order to perform visual displacement measurement on the monitoring points on the sidewall within the target dam gallery 100, a visual displacement monitor 12 is mounted on the bottom of the tie-down piece 11 instead of being directly installed on the top or using a rigid rod. This is because when displacement occurs on the inner wall of the target dam gallery 100, the center of the arch of the target dam gallery 100, being integrated with the dam body, experiences smaller displacement, while the sidewalls experience larger displacement. The tie-down piece 11 is used to reduce the displacement of the visual displacement monitor 12 when displacement occurs, thereby reducing interference with the measurement results.

[0061] The mooring element 11 can be a steel wire rope, which must not twist during natural descent;

[0062] When a large displacement occurs, the visual displacement monitor 12 may experience pendulum motion under the action of the tether 11. If no intervention is taken, the pendulum motion will continue to affect the visual measurement results. The pendulum motion is actively stopped by the nozzle 132 of the swing suppression device 13. The control principle is based on the data analysis of the gyroscope 131 to determine whether a pendulum motion occurs and its direction. The jet controller 133 controls one or two corresponding nozzles 132 to spray gas to obstruct the pendulum motion, thereby quickly stopping the swing of the visual displacement monitor 12. This allows the visual displacement monitor 12 to more accurately capture visual images of the multiple target devices 14 deployed at the monitoring points when displacement occurs in a large dam area.

[0063] The nozzle 132 can be a miniature nozzle that can eject compressed air, or it can be a miniature propeller to achieve the same purpose.

[0064] The visual displacement measurement and analysis unit 3 calculates the displacement values ​​of multiple target devices 14 based on the time axis using a visual measurement method. The displacement value is calculated separately for each monitoring point. Each displacement value represents the displacement of the monitoring point where the corresponding target device 14 is located. The displacement value is displayed using the corresponding monitoring point. The displacement data of the monitoring point can also be set with a threshold. When the threshold is exceeded, an alarm should be triggered so that staff can perform timely manual analysis and handling.

[0065] In step 4, the method for calculating the displacement of the target paper feature points is as follows:

[0066] Let the coordinates of a target feature point on the target at time t be (x, y). t y t ), at time t+1, the coordinates of the target paper feature point in the image are (x t+1 y t+1 );

[0067] Then the displacement of the feature point on the x-axis is Δx = x t+1 -x t The displacement along the y-axis is: Δy = y t+1 -y t .

[0068] Total displacement of target paper feature points

[0069] Calculate the displacement of each target paper feature point at different times. To improve monitoring accuracy, multiple target paper feature points can be selected, and their average displacement can be calculated.

[0070] The displacement data is analyzed to determine the stability of the corridor within the dam. If the displacement exceeds a preset threshold, an early warning is issued.

[0071] The visual displacement monitor 12 includes a housing 121, a visual camera 122, and a visual monitoring end wireless communication module 123. The top of the housing 121 is provided with a tethering seat, which is connected to the other end of the tethering member 11. The visual camera 122, the visual monitoring end wireless communication module 123, and the battery pack 124 are installed inside the housing 121. The shooting focus of the visual camera 122 is located on the central axis of the multiple target devices 14. The data output end of the visual camera 122 is communicatively connected to the data input end of the visual monitoring end wireless communication module 123. The visual monitoring end wireless communication module 123 wirelessly interacts with the visual displacement measurement and analysis unit 3 through the monitoring and communication unit in the corridor to receive the target visual images captured by the visual camera 122.

[0072] The visual camera 122 can continuously capture visual images of multiple target devices 14 and wirelessly transmit the visual images to the visual displacement measurement and analysis unit 3 through the visual monitoring terminal wireless communication module 123 and the corridor monitoring communication unit.

[0073] The visual displacement monitor 12 also includes a battery pack 124, which is installed inside the housing 121. After installation, the center of gravity of the visual displacement monitor 12 is located on the line connecting the upper and lower geometric centers of the housing 121. The battery pack 124 provides power to the visual camera 122 and the visual monitoring terminal wireless communication module 123.

[0074] The battery pack 124 can power the visual camera 122 and the visual monitoring terminal wireless communication module 123. The battery pack 124 can also be installed in a position that allows the center of gravity of the visual displacement monitor 12 to be located on the line connecting the geometric centers of the upper and lower parts of the housing 121, thereby further increasing the stability of the visual camera 122.

[0075] The visual displacement measurement and analysis unit 3 includes a displacement measurement and analysis end wireless communication unit 31, a memory 32, a visual analysis chip 33, and a data analysis chip 34. The displacement measurement and analysis end wireless communication unit 31 is wirelessly connected to the visual monitoring end wireless communication module 123 through the corridor monitoring communication unit, and acquires the target visual images captured by the visual camera 122. The memory 32 is communicatively connected to the data output end of the displacement measurement and analysis end wireless communication unit 31. The visual analysis chip 33 and the data analysis chip 34 are communicatively connected to the memory 32 respectively. The visual analysis chip 33 calls the target visual images based on the time sequence to analyze the target displacement. The data analysis chip 34 calculates the displacement measurement result based on the target displacement visual analysis result and stores the displacement measurement result in the memory 32 for future reference.

[0076] The visual analysis chip 33 performs visual feature analysis on the captured target visual image, while the data analysis chip 34 calculates the actual displacement value based on the visual analysis results.

[0077] The visual displacement measurement and analysis unit 3 also includes a display 35, which is communicatively connected to the memory 32 and is used to display displacement measurement results.

[0078] The monitoring and communication unit in the corridor includes multiple tunnel relay communication base stations 2, which are arranged at equal intervals within the target dam corridor 100. The multiple tunnel relay communication base stations 2 form a wireless self-organizing network. The tunnel relay communication base station 2 closest to the visual displacement monitor 12 is wirelessly connected to the visual monitoring end wireless communication module 123, and the tunnel relay communication base station 2 closest to the visual displacement measurement and analysis unit 3 is wirelessly connected to the displacement measurement and analysis end wireless communication unit 31.

[0079] The tunnel relay communication base station 2 can be a relay communication base station based on wireless WIFI technology, 4G / 5G wireless communication technology, Bluetooth communication technology and other wireless communication technologies, and can realize wireless self-organizing network communication.

[0080] The target device 14 includes a support frame 141 and a target plate 142. The support frame 141 is detachably installed on the side wall of the target dam gallery 100. The target plate 142 is installed on the support frame 141. Target paper is attached to the surface of the target plate 142, and the target paper faces the lens of the visual camera 122.

[0081] The target paper on the target plate 142 provides monitoring point features for the visual camera 122.

[0082] The inner wall of the target dam gallery 100 has one monitoring point at the arch top, two monitoring points at the arch bottom, and four monitoring points symmetrically arranged at the arch waist. There are seven target devices 14, which are installed at the seven monitoring points on the inner wall of the target dam gallery 100.

[0083] For the target dam corridor 100, multiple sets of visual displacement monitoring devices can be arranged at set intervals or according to the length of the straight section within the target dam corridor 100. Each set of visual displacement monitoring devices uses seven target devices 14, with the seven target devices 14 corresponding to seven monitoring points, and the seven monitoring points located on the same plane.

[0084] The following specific embodiments illustrate the implementation principle of the visual displacement measurement data processing method and device for dam gallery according to the present invention:

[0085] A visual displacement monitoring device, a monitoring and communication unit within the corridor 100 of a target dam body, and a visual displacement measurement and analysis unit 3 are arranged inside the corridor. One end of the tethering member 11 is fixed to the middle of the top of the inner wall of the corridor 100 of the target dam body, and the top center of the visual displacement monitor 12 is tied to the other end of the tethering member 11. The swing suppression device 13 includes a gyroscope 131, four jet nozzles 132, and a chip-based jet controller 133. The gyroscope 131 is installed at the center of the visual displacement monitor 12, and the four jet nozzles 132 are installed on the four sides of the visual displacement monitor 12. The jet controller 133 is communicatively connected to the gyroscope 131. Based on the data analysis of the gyroscope 131, it analyzes whether there is pendulum motion, calculates the swing direction and amplitude, and controls the four jet nozzles 132 to work together to stop the visual displacement monitor 12 from swinging.

[0086] Multiple target devices 14 are respectively installed around the side wall of the target dam gallery 100;

[0087] The visual displacement monitor 12 and the sway suppression device 13 are respectively connected to the visual displacement measurement and analysis unit 3 through the monitoring and communication unit in the corridor.

[0088] The visual displacement measurement and analysis unit 3 calculates the displacement values ​​of multiple target devices 14 based on the time axis using a visual measurement method.

[0089] Every hour, the visual camera 122 captures visual images of the target paper of the seven target devices 14 and transmits them to the visual displacement measurement and analysis unit 3 through the monitoring and communication unit in the corridor.

[0090] The visual displacement measurement and analysis unit 3 performs image preprocessing on the visual image of the target paper, including grayscale conversion, binarization, and noise reduction, to improve image quality and facilitate subsequent processing.

[0091] Visual displacement measurement and analysis unit 3 uses a feature recognition algorithm to extract the target paper feature points and the target paper feature point positions respectively;

[0092] Let the coordinates of a target feature point on the target at time t be (x, y). t y t ), at time t+1, the coordinates of the target paper feature point in the image are (x t+1 y t+1 );

[0093] Then the displacement of the feature point on the x-axis is Δx = x t+1 -x t The displacement along the y-axis is: Δy = y t+1 -y t .

[0094] Total displacement of target paper feature points

[0095] Calculate the total displacement of all target paper feature points and display the total displacement of all target paper feature points on display 35.

[0096] The displacement alarm threshold Dmax is set to 2mm. At time t+1, the total displacement of the two monitoring points on the left arch is ΔD = 4.5mm, which is greater than the displacement alarm threshold Dmax. The audible and visual alarm set in the monitoring center is activated, and the original visual image of the target device 14 corresponding to the specific target paper feature point is displayed on the monitor 35. After receiving the above alarm, the staff quickly conducts on-site investigation.

[0097] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for processing visual displacement measurement data of a dam gallery, characterized in that: The displacement of the target dam gallery (100) is measured using a visual displacement measurement device for the dam gallery, including the following steps: Step (1): Every set time interval, the visual camera (122) captures the visual images of the target paper of the seven target devices (14) and transmits them to the visual displacement measurement and analysis unit (3) through the monitoring and communication unit in the corridor. Step 2, the visual displacement measurement and analysis unit (3) performs image preprocessing on the visual image of the target paper; Step 3, the visual displacement measurement and analysis unit (3) uses a feature recognition algorithm to extract the target paper feature points and the target paper feature point positions respectively; Step 4: Calculate the displacement of the target paper feature points based on their coordinates in the image at time t and time t+1. Calculate the total displacement of all target paper feature points and display the total displacement of all target paper feature points on the display (35); The visual displacement measurement device for the dam gallery includes multiple sets of visual displacement monitoring devices, a monitoring and communication unit within the gallery, and a visual displacement measurement and analysis unit (3). The visual displacement monitoring device includes a mooring device (11), a visual displacement monitor (12), a sway suppression device (13), and multiple sets of target devices (14). One end of the mooring device (11) is fixed to the middle of the top of the inner wall of the target dam gallery (100), and the top surface of the visual displacement monitor (12) is moored to the other end of the mooring device (11). The sway suppression device (13) includes a gyroscope (131), four jet nozzles (132), and a chip-based jet controller (133). The gyroscope (131) is installed in the center of the visual displacement monitor (12), and the four jet nozzles... (132) Installed on the four sides of the visual displacement monitor (12), the jet controller (133) is connected to the gyroscope (131) for communication. Based on the data analysis of the gyroscope (131), it analyzes whether there is pendulum motion and calculates the swing direction and amplitude. It controls the four jet nozzles (132) to work together to stop the visual displacement monitor (12) from pendulum motion. Multiple target devices (14) are installed around the side wall of the target dam corridor (100). The visual displacement monitor (12) and the swing suppression device (13) are connected to the visual displacement measurement and analysis unit (3) through the monitoring and communication unit in the corridor. The visual displacement measurement and analysis unit (3) calculates the displacement values ​​of multiple target devices (14) based on the time axis using the visual measurement method.

2. The method for processing visual displacement measurement data of a dam gallery according to claim 1, characterized in that: In step 4, the method for calculating the displacement of the target paper feature points is as follows: Let the coordinates of a target feature point on the target at time t be (x, y). t y t ), at time t+1, the coordinates of the target paper feature point in the image are (x t+1 y t+1 ); Then the displacement of the feature point on the x-axis is Δx = x t+1 -x t The displacement along the y-axis is: Δy = y t+1 -y t; Total displacement of target paper feature points 3. The method for processing visual displacement measurement data of a dam gallery according to claim 1, characterized in that: The visual displacement monitor (12) includes a housing (121), a visual camera (122), and a visual monitoring end wireless communication module (123). The top of the housing (121) is provided with a tethering seat, which is connected to the other end of the tethering component (11). The visual camera (122), the visual monitoring end wireless communication module (123), and the battery pack (124) are installed inside the housing (121). The shooting focus of the visual camera (122) is located on the central axis of the multiple target devices (14). The data output end of the visual camera (122) is connected to the data input end of the visual monitoring end wireless communication module (123). The visual monitoring end wireless communication module (123) wirelessly interacts with the visual displacement measurement and analysis unit (3) through the monitoring and communication unit in the corridor to view the target visual images captured by the visual camera (122).

4. The method for processing visual displacement measurement data of a dam gallery according to claim 3, characterized in that: The visual displacement monitor (12) also includes a battery pack (124), which is installed inside the housing (121). After installation, the center of gravity of the visual displacement monitor (12) is located on the line connecting the geometric centers above and below the housing (121). The battery pack (124) supplies power to the visual camera (122) and the visual monitoring terminal wireless communication module (123).

5. The method for processing visual displacement measurement data of a dam gallery according to claim 4, characterized in that: The visual displacement measurement and analysis unit (3) includes a displacement measurement and analysis end wireless communication unit (31), a memory (32), a visual analysis chip (33), and a data analysis chip (34). The displacement measurement and analysis end wireless communication unit (31) is wirelessly connected to the visual monitoring end wireless communication module (123) through the corridor monitoring communication unit, and collects the target visual images captured by the visual camera (122). The memory (32) is connected to the data output end of the displacement measurement and analysis end wireless communication unit (31). The visual analysis chip (33) and the data analysis chip (34) are connected to the memory (32) respectively. The visual analysis chip (33) calls the target visual images based on the time sequence to analyze the target displacement. The data analysis chip (34) calculates the displacement measurement result based on the target displacement visual analysis result and stores the displacement measurement result in the memory (32) for future reference.

6. The method for processing visual displacement measurement data of a dam gallery according to claim 5, characterized in that: The visual displacement measurement and analysis unit (3) also includes a display (35), which is communicatively connected to the memory (32) for displaying displacement measurement results.

7. The method for processing visual displacement measurement data of a dam gallery according to claim 6, characterized in that: The monitoring and communication unit in the corridor includes multiple roadway relay communication base stations (2). The multiple roadway relay communication base stations (2) are arranged at equal intervals in the corridor (100) of the target dam body. The multiple roadway relay communication base stations (2) form a wireless communication self-organizing network. The roadway relay communication base station (2) close to the visual displacement monitor (12) is wirelessly connected to the visual monitoring end wireless communication module (123). The roadway relay communication base station (2) close to the visual displacement measurement and analysis unit (3) is wirelessly connected to the displacement measurement and analysis end wireless communication unit (31).

8. The method for processing visual displacement measurement data of a dam gallery according to claim 7, characterized in that: The target device (14) includes a support frame (141) and a target plate (142). The support frame (141) is detachably installed on the side wall of the target dam gallery (100). The target plate (142) is installed on the support frame (141). Target paper is attached to the surface of the target plate (142), and the target paper faces the lens of the visual camera (122).

9. The method for processing visual displacement measurement data of a dam gallery according to claim 8, characterized in that: The inner wall of the target dam gallery (100) has one monitoring point at the top of the arch, two monitoring points at the bottom of the arch, and four monitoring points symmetrically arranged at the waist of the arch. The number of target devices (14) is seven, and the seven target devices (14) are respectively installed at the seven monitoring points on the inner wall of the target dam gallery (100).

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