Visual displacement measuring system and measuring method for gallery of large dam body

Abstract

The invention discloses a large dam body gallery visual displacement measuring system and measuring method, and relates to the technical field of large-scale hydropower engineering dam appearance monitoring, and the system comprises a plurality of visual displacement monitoring devices, a gallery internal monitoring communication unit and a visual displacement measurement analysis unit. The visual displacement monitoring device comprises a mooring piece, a visual displacement monitor, a swing restraining device and a plurality of sets of target devices. The mode that the visual displacement monitor is mounted at the bottom of the mooring piece is adopted, and interference on a measurement result is reduced; the visual displacement measurement and analysis unit calculates displacement values of the multiple target devices based on a time axis by adopting a visual measurement method, and the displacement values are displayed by adopting corresponding monitoring points; and continuous and high-precision displacement measurement can be carried out on the monitoring points in the target large dam body gallery.

Description

Technical Field

[0001] The invention relates to the technical field of large-scale hydropower engineering dam appearance monitoring, and in particular to a dam body gallery visual displacement measurement system and a measurement method. Background Art

[0002] Displacement monitoring within the dam corridor is extremely important to ensure the safe operation of the dam. The following are some aspects of the importance of displacement monitoring:

[0003] By monitoring the displacement within the corridor, problems such as deformation or cracks in the dam structure can be discovered in a timely manner, providing early warning for possible safety accidents, so that corresponding measures can be taken to prevent accidents from happening.

[0004] Displacement monitoring data is an important indicator for assessing the health of dam structures. 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 of the dam, such as adjusting the reservoir water level, optimizing flood discharge measures, etc., to ensure that the dam operates within a safe range.

[0006] By monitoring and analyzing the displacement within the dam corridor, actual operating data support can be provided for future dam design and promote the improvement of design methods.

[0007] According to relevant Chinese laws, regulations and industry standards, dams are important water conservancy facilities and their safety monitoring is necessary, of which displacement monitoring is an important part.

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

[0009] Through long-term monitoring of displacement within the dam corridor, the long-term stability of the dam can be analyzed, providing a basis for formulating long-term dam maintenance and management plans.

[0010] Therefore, displacement monitoring in the dam corridor is an important measure to ensure dam safety, prevent accidents, protect people's lives and property safety and social stability. Due to isolation from the external environment, traditional displacement monitoring methods such as dam monitoring stations and GPS positioning detection cannot achieve displacement measurement in the corridor. Summary of the invention

[0011] In order to solve the above-mentioned technical problem of dam corridor displacement measurement, the present invention provides a dam corridor visual displacement measurement system and measurement method. The following technical solutions are adopted:

[0012] A dam body gallery visual displacement measurement system includes multiple sets of visual displacement monitoring devices, a gallery monitoring communication unit and a visual displacement measurement and analysis unit. The visual displacement monitoring device includes a mooring, a visual displacement monitor, a swing suppression device and multiple sets of target devices. One end of the mooring is fixed to the middle of the top of the inner wall of the target dam body gallery, and the middle of the top surface of the visual displacement monitor is moored to the other end of the mooring. The swing suppression device includes a gyroscope, four injection ports and a chip-based injection controller. The gyroscope is installed at the center of the visual displacement monitor, and the four injection ports are installed on the four sides of the visual displacement monitor. The injection controller is connected to the gyroscope for communication. Based on the data of the gyroscope, it analyzes whether there is a single pendulum motion, calculates the swing direction and amplitude, and controls the linkage of the four injection ports to stop the single pendulum motion of the visual displacement monitor.

[0013] Multiple sets of target devices are installed around the side walls of the target dam corridor;

[0014] The visual displacement monitor and the swing suppression device are respectively connected to the visual displacement measurement and analysis unit through the corridor monitoring communication unit;

[0015] The visual displacement measurement and analysis unit calculates the displacement values ​​of the plurality of target devices respectively by using a visual measurement method based on a time axis.

[0016] By adopting the above technical solution, in order to perform visual displacement measurement of the monitoring points on the side wall in the target dam body gallery, a mode of mounting the visual displacement monitor at the bottom of the mooring is adopted, rather than directly installing it on the top or using a hard hanger installation mode. This is because when the inner wall of the target dam body gallery is displaced, the center of the arch of the target dam body gallery is integrated with the dam body and has a smaller displacement, while the displacement of the side wall is larger. The mode of adopting the mooring is to reduce the displacement of the visual displacement monitor when displacement occurs, thereby reducing interference with the measurement results.

[0017] The mooring device can be a steel wire rope, which cannot be twisted during the natural drooping process;

[0018] When a large displacement occurs, the visual displacement monitor may experience a single pendulum motion under the action of the mooring parts. If the single pendulum motion is not intervened at this time, it will continue to affect the visual measurement results. The jet port of the swing suppression device is used to actively stop the single pendulum motion. The control principle is based on the data analysis of the gyroscope to determine whether a single pendulum occurs and the direction of the single pendulum. The jet controller controls one or two corresponding jet ports to eject gas to hinder the single pendulum, so that the visual displacement monitor stops swinging quickly. In the case of displacement in a large dam area, the visual displacement monitor can more accurately capture visual images of multiple target devices arranged at the monitoring point.

[0019] The jet nozzle may be a micro nozzle capable of ejecting compressed air, or a micro propeller may be used to achieve the same purpose;

[0020] The visual displacement measurement and analysis unit calculates the displacement values ​​of multiple target devices respectively using a visual measurement method based on the time axis, and the displacement values ​​are displayed using corresponding monitoring points.

[0021] Optionally, the visual displacement monitor includes a shell, a visual camera and a visual monitoring end wireless communication module, a mooring seat is provided on the top of the shell, and the mooring seat is connected and installed on the other end of the mooring piece; the visual camera, the visual monitoring end wireless communication module and the battery pack are installed in the shell, the shooting focus of the visual camera is located on the central axis of multiple sets of target devices, the data output end of the visual camera is communicatively connected with the data input end of the visual monitoring end wireless communication module, and the visual monitoring end wireless communication module communicates with the visual displacement measurement and analysis unit through the in-corridor monitoring communication unit to exchange the target visual picture taken by the visual camera.

[0022] By adopting the above technical solution, the visual camera can continuously capture the visual images of multiple target devices, and wirelessly transmit the visual images to the visual displacement measurement and analysis unit through the visual monitoring end wireless communication module and the corridor monitoring communication unit.

[0023] Optionally, the visual displacement monitor also includes a battery pack, which is installed in the shell. After installation, the center of gravity of the visual displacement monitor is located on the geometric center line of the upper and lower parts of the shell. The battery pack supplies power to the visual camera and the wireless communication module of the visual monitoring end respectively.

[0024] By adopting the above technical solution, the battery pack can power the visual camera and the wireless communication module of the visual monitoring end. The center of gravity of the visual displacement monitor can also be located on the geometric center line of the upper and lower surfaces of the shell through the installation position of the battery pack, thereby further increasing the stability of the visual camera.

[0025] 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 collect the target visual image taken 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 respectively. The visual analysis chip calls the target visual image based on the time series 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.

[0026] By adopting the above technical solution, the role of the visual analysis chip is to perform visual feature analysis on the captured target visual image, and the role of the data analysis chip is to calculate the actual displacement value based on the visual analysis result.

[0027] Optionally, the visual displacement measurement and analysis unit further includes a display, which is communicatively connected to the memory and is used to display the displacement measurement result.

[0028] Optionally, the monitoring communication unit in the corridor includes multiple tunnel relay communication base stations, and the multiple tunnel relay communication base stations are arranged at equal intervals in the corridor of the target dam body. The multiple tunnel relay communication base stations form a wireless communication self-organizing network. The tunnel relay communication base station close to the visual displacement monitor is wirelessly connected to the visual monitoring end wireless communication module, and the tunnel relay communication base station close to the visual displacement measurement and analysis unit is wirelessly connected to the displacement measurement and analysis end wireless communication unit.

[0029] By adopting the above technical solution, the lane relay communication base station can be a relay communication base station based on wireless communication technologies such as wireless WIFI technology, 4G / 5G wireless communication technology, Bluetooth communication technology, etc., which can realize wireless ad hoc network communication.

[0030] Optionally, the target device includes a support frame and a target plate, wherein the support frame is detachably mounted on the side wall of the target dam body gallery, and the target plate is mounted on the support frame, and a target paper is affixed to the surface of the target plate, with the target paper surface facing the lens of the visual camera.

[0031] By adopting the above technical solution, the target paper surface on the target board provides monitoring point features for the visual camera.

[0032] Optionally, a monitoring point is provided on the arch top of the inner wall of the target dam body corridor, two monitoring points are provided on the arch bottom, and four monitoring points are symmetrically provided on the arch waist. The number of target devices is seven, and the seven target devices are respectively installed at seven monitoring points on the inner wall of the target dam body corridor.

[0033] By adopting the above technical solution, for the target dam body corridor, multiple sets of visual displacement monitoring devices can be arranged at set intervals or according to the length of the straight section in the target dam body corridor, and each set of visual displacement monitoring devices uses seven target devices, and the seven target devices correspond to seven monitoring points, and the seven monitoring points are located on the same plane.

[0034] A dam body corridor visual displacement measurement method adopts a dam body corridor visual displacement measurement system to perform visual displacement measurement on a target dam body corridor, comprising the following steps:

[0035] Step 1: At set time intervals, the visual camera captures the 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 communication unit in the corridor;

[0036] Step 2, the visual displacement measurement and analysis unit performs image preprocessing on the visual picture of the target paper;

[0037] 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;

[0038] Step 4: Assume that the coordinates of a feature point of the target paper at the tth time in the image are (x t ,y t ), the coordinates of the feature point of the target paper in the image at time t+1 are (x t+1 ,y t+1 );

[0039] Then the displacement of the feature point on the x-axis is Δx=x t+1 -x t ; The displacement in the y-axis direction is: Δy = y t+1 -y t .

[0040] Total displacement of target paper feature points

[0041] The total displacement of all target paper feature points is calculated and displayed on a display.

[0042] By adopting the above technical solution, it is possible to achieve continuous and high-precision displacement measurement of monitoring points within the corridor of the target dam body.

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

[0044] The present invention can provide a dam body corridor visual displacement measurement system and measurement method, adopting a mode of mounting a visual displacement monitor on the bottom of a mooring component to reduce interference with measurement results; a visual displacement measurement and analysis unit adopts a visual measurement method based on a time axis to respectively calculate the displacement values ​​of a plurality of target devices, and the displacement values ​​are displayed using corresponding monitoring points; continuous and high-precision displacement measurement of monitoring points in a target dam body corridor can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the component connection principle of a dam body gallery visual displacement measurement system of the present invention;

[0046] Figure 2 The present invention is a schematic structural diagram of the positional relationship between a visual displacement monitor and a target device of a dam gallery visual displacement measurement system.

[0047] Figure 3 It is a schematic diagram of a method for measuring visual displacement of a dam corridor according to the present invention.

[0048] Explanation of the reference numerals: 11. mooring part; 12. visual displacement monitor; 121. housing; 122. visual camera; 123. wireless communication module of visual monitoring end; 124. battery pack; 13. swing suppression device; 131. gyroscope; 132. injection port; 133. injection controller; 14. target device; 141. support frame; 142. target plate; 2. tunnel relay communication base station; 31. wireless communication unit of displacement measurement and analysis end; 32. memory; 33. visual analysis chip; 34. data analysis chip; 35. display; 100. target dam corridor. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0050] The embodiment of the invention discloses a dam body corridor visual displacement measurement system and a measurement method.

[0051] Reference Figure 1 - Figure 3 A dam body corridor visual displacement measurement system includes multiple sets of visual displacement monitoring devices, a corridor monitoring communication unit and a visual displacement measurement and analysis unit 3. The visual displacement monitoring device includes a mooring 11, a visual displacement monitor 12, a swing suppression device 13 and multiple sets of target devices 14. One end of the mooring 11 is fixed to the middle of the top of the inner wall of the target dam body corridor 100, and the middle of the top surface of the visual displacement monitor 12 is moored to the other end of the mooring 11. The swing suppression device 13 includes a gyroscope 131, four injection ports 132 and a chip-based injection controller 133. The gyroscope 131 is installed at the center position of the visual displacement monitor 12, and the four injection ports 132 are installed on the four sides of the visual displacement monitor 12. The injection controller 133 is connected to the gyroscope 131 for communication. Based on the data of the gyroscope 131, it analyzes whether there is a simple pendulum motion, calculates the swing direction and amplitude, and controls the linkage of the four injection ports 132 to stop the simple pendulum motion of the visual displacement monitor 12.

[0052] A plurality of target devices 14 are respectively installed around the side walls of the target dam body gallery 100;

[0053] The visual displacement monitor 12 and the swing suppression device 13 are respectively connected to the visual displacement measurement and analysis unit 3 through the corridor monitoring communication unit;

[0054] The visual displacement measurement and analysis unit 3 calculates the displacement values ​​of the plurality of target devices 14 respectively by using a visual measurement method based on a time axis.

[0055] In order to be able to perform visual displacement measurement of the monitoring points on the side wall in the target dam body gallery 100, a mode of mounting the visual displacement monitor 12 at the bottom of the mooring 11 is adopted, rather than directly installing it on the top or using a hard hanger installation mode. This is because when the inner wall of the target dam body gallery 100 is displaced, the center of the arch of the target dam body gallery 100 is integrated with the dam body and has a smaller displacement, while the displacement of the side wall is larger. The mode of using the mooring 11 is to reduce the displacement of the visual displacement monitor 12 when displacement occurs, thereby reducing interference with the measurement results.

[0056] The mooring member 11 may be a steel wire rope, which cannot be twisted during the natural drooping process;

[0057] When a large displacement occurs, the visual displacement monitor 12 may have a single pendulum motion under the action of the mooring member 11. If the single pendulum motion is not intervened at this time, it will continue to affect the visual measurement results. The jet port 132 of the swing suppression device 13 is used to actively stop the single pendulum motion. The control principle is to analyze whether a single pendulum occurs and the direction of the single pendulum based on the data of the gyroscope 131. The jet controller 133 controls the corresponding one or two jet ports 132 to spray gas to hinder the single pendulum, so that the visual displacement monitor 12 stops swinging quickly. In the case of displacement in a large dam area, the visual displacement monitor 12 can more accurately capture visual images of multiple target devices 14 arranged at the monitoring point.

[0058] The injection port 132 may be a micro nozzle capable of injecting compressed air, or a micro propeller may be used to achieve the same purpose;

[0059] The visual displacement measurement and analysis unit 3 calculates the displacement values ​​of the plurality of target devices 14 respectively by using a visual measurement method based on the time axis, and the displacement values ​​are displayed by using corresponding monitoring points.

[0060] The visual displacement monitor 12 includes a shell 121, a visual camera 122 and a visual monitoring end wireless communication module 123. A mooring seat is provided on the top of the shell 121, and the mooring seat is connected and installed at the other end of the mooring member 11; the visual camera 122, the visual monitoring end wireless communication module 123 and the battery pack 124 are installed in the shell 121, and the shooting focus of the visual camera 122 is located on the central axis of the multiple sets of target devices 14. The data output end of the visual camera 122 is communicatively connected with the data input end of the visual monitoring end wireless communication module 123. The visual monitoring end wireless communication module 123 communicates with the visual displacement measurement and analysis unit 3 through the in-corridor monitoring communication unit to exchange the target visual picture taken by the visual camera 122.

[0061] The visual camera 122 can continuously capture the 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 end wireless communication module 123 and the corridor monitoring communication unit.

[0062] The visual displacement monitor 12 also includes a battery pack 124, which is installed in the shell 121. After installation, the center of gravity of the visual displacement monitor 12 is located on the geometric center line connecting the upper and lower sides of the shell 121. The battery pack 124 supplies power to the visual camera 122 and the visual monitoring end wireless communication module 123 respectively.

[0063] The battery pack 124 can provide power for the visual camera 122 and the visual monitoring end wireless communication module 123. The center of gravity of the visual displacement monitor 12 can also be located on the geometric center line of the upper and lower surfaces of the shell 121 through the installation position of the battery pack 124, thereby further increasing the stability of the visual camera 122.

[0064] 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 to collect the target visual image taken 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 image based on the time series 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 reference.

[0065] The function of the visual analysis chip 33 is to perform visual feature analysis on the captured target visual image, and the function of the data analysis chip 34 is to calculate the actual displacement value based on the visual analysis result.

[0066] The visual displacement measurement and analysis unit 3 further includes a display 35 , which is communicatively connected to the memory 32 and is used to display the displacement measurement result.

[0067] The monitoring communication unit in the corridor includes multiple tunnel relay communication base stations 2, and the multiple tunnel relay communication base stations 2 are arranged at equal intervals in the target dam body corridor 100. The multiple tunnel relay communication base stations 2 wirelessly communicate in an ad hoc network. The tunnel relay communication base station 2 close 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 close to the visual displacement measurement and analysis unit 3 is wirelessly connected to the displacement measurement and analysis end wireless communication unit 31.

[0068] The lane relay communication base station 2 can be a relay communication base station based on wireless communication technologies such as wireless WIFI technology, 4G / 5G wireless communication technology, Bluetooth communication technology, etc., and can realize wireless ad hoc network communication.

[0069] The target device 14 includes a support frame 141 and a target plate 142 . The support frame 141 is detachably mounted on the side wall of the target dam body gallery 100 . The target plate 142 is mounted on the support frame 141 . A target paper is attached to the surface of the target plate 142 , and the target paper surface faces the lens of the visual camera 122 .

[0070] The target paper surface on the target plate 142 provides monitoring point features for the visual camera 122 .

[0071] The inner wall arch top of the target dam body corridor 100 is provided with a monitoring point, the arch bottom is provided with two monitoring points, and the arch waist is symmetrically provided with four monitoring points. 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 body corridor 100.

[0072] For the target dam body corridor 100, multiple sets of visual displacement monitoring devices can be arranged at set intervals or according to the length of the straight section in the target dam body corridor 100. Each set of visual displacement monitoring devices uses seven target devices 14. The seven target devices 14 correspond to seven monitoring points, and the seven monitoring points are located on the same plane.

[0073] A dam body corridor visual displacement measurement method, using a dam body corridor visual displacement measurement system to perform visual displacement measurement on a target dam body corridor 100, comprises the following steps:

[0074] Step 1, at every set time interval, the visual camera 122 captures the target paper visual images of the seven target devices 14, and transmits them to the visual displacement measurement and analysis unit 3 through the corridor monitoring communication unit;

[0075] Step 2, the visual displacement measurement and analysis unit 3 performs image preprocessing on the visual picture of the target paper;

[0076] Step 3, the visual displacement measurement and analysis unit 3 uses a feature recognition algorithm to extract target paper feature points and target paper feature point positions respectively;

[0077] Step 4: Assume that the coordinates of a feature point of the target paper at the tth time in the image are (x t ,y t ), the coordinates of the feature point of the target paper in the image at time t+1 are (x t+1 ,y t+1 );

[0078] Then the displacement of the feature point on the x-axis is Δx=x t+1 -xt ; The displacement in the y-axis direction is: Δy = y t+1 -y t ;

[0079] Total displacement of target paper feature points

[0080] The total displacement of all target paper feature points is calculated and displayed on the display 35 .

[0081] The displacement measurement of the monitoring points in the target dam body corridor 100 can be carried out continuously and with high precision.

[0082] The following specific embodiments are used to illustrate the implementation principle of a dam corridor visual displacement measurement system and measurement method of the present invention:

[0083] A visual displacement monitoring device, a monitoring communication unit in the corridor and a visual displacement measurement and analysis unit 3 are arranged in a certain target dam body corridor 100. One end of the mooring 11 is fixed to the middle of the top of the inner wall of the target dam body corridor 100. The middle of the top surface of the visual displacement monitor 12 is moored to the other end of the mooring 11. The swing suppression device 13 includes a gyroscope 131, four injection ports 132 and a chip-based injection controller 133. The gyroscope 131 is installed at the center of the visual displacement monitor 12. The four injection ports 132 are installed on the four sides of the visual displacement monitor 12. The injection controller 133 is connected to the gyroscope 131 for communication. Based on the data of the gyroscope 131, it analyzes whether there is a simple pendulum motion, calculates the swing direction and amplitude, controls the linkage of the four injection ports 132, and stops the simple pendulum motion of the visual displacement monitor 12.

[0084] A plurality of target devices 14 are respectively installed around the side walls of the target dam body gallery 100;

[0085] The visual displacement monitor 12 and the swing suppression device 13 are respectively connected to the visual displacement measurement and analysis unit 3 through the corridor monitoring communication unit;

[0086] The visual displacement measurement and analysis unit 3 calculates the displacement values ​​of the plurality of target devices 14 respectively by using a visual measurement method based on a time axis.

[0087] Every hour, 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 corridor monitoring communication unit;

[0088] The visual displacement measurement and analysis unit 3 performs image preprocessing on the visual picture of the target paper, including grayscale, binarization, denoising, etc., to improve the image quality and facilitate subsequent processing;

[0089] 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;

[0090] Suppose the coordinates of a certain feature point of the target paper at the tth time in the image are (x t ,y t ), the coordinates of the feature point of the target paper in the image at time t+1 are (x t+1 ,y t+1 );

[0091] Then the displacement of the feature point on the x-axis is Δx=x t+1 -x t ; The displacement in the y-axis direction is: Δy = y t+1 -y t ;

[0092] Total displacement of target paper feature points

[0093] The total displacement of all target paper feature points is calculated and displayed on the display 35 .

[0094] The displacement alarm threshold Dmax is set to 2 mm. At the t+1 moment, the total displacements of the two monitoring points on the left side of the arch are both ΔD=4.5 mm, both of which are greater than the displacement alarm threshold Dmax. The sound and light alarm set in the monitoring center turns on the alarm, and the original visual image of the target device 14 corresponding to the specific target paper feature point is displayed on the display 35. After receiving the above alarm, the staff quickly conducts on-site inspection.

[0095] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dam corridor visual displacement measurement system, characterized by: The invention comprises a plurality of visual displacement monitoring devices, a corridor monitoring communication unit and a visual displacement measurement and analysis unit (3), wherein the visual displacement monitoring device comprises a mooring member (11), a visual displacement monitor (12), a swing suppression device (13) and a plurality of target devices (14), wherein one end of the mooring member (11) is fixed to the middle of the top of the inner wall of the corridor (100) of the target dam body, the middle of the top surface of the visual displacement monitor (12) is moored to the other end of the mooring member (11), and the swing suppression device (13) comprises a gyroscope (131), four spray nozzles, and a plurality of target devices (14). The jet nozzle (132) and the jet controller (133) based on the chip, the gyroscope (131) is installed at the center position 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 connected to the gyroscope (131) for communication, and analyzes whether there is a simple pendulum motion based on the data of the gyroscope (131), calculates the swing direction and amplitude, and controls the four jet nozzles (132) to be linked, so that the visual displacement monitor (12) stops the simple pendulum motion; A plurality of target devices (14) are respectively installed around the side walls of the target dam body gallery (100); The visual displacement monitor (12) and the swing suppression device (13) are respectively connected to the visual displacement measurement and analysis unit (3) through the corridor monitoring communication unit; The visual displacement measurement analysis unit (3) respectively calculates the displacement values ​​of a plurality of target devices (14) using a visual measurement method based on a time axis.

2. A dam corridor visual displacement measurement system according to claim 1, characterized in that: The visual displacement monitor (12) comprises a housing (121), a visual camera (122) and a visual monitoring end wireless communication module (123); a mooring seat is provided on the top of the housing (121), and the mooring seat is connected and installed on the other end of the mooring member (11); the visual camera (122), the visual monitoring end wireless communication module (123) and a battery pack (124) are installed in the housing (121); the shooting focus of the visual camera (122) is located on the central axis of the plurality of target devices (14); the data output end of the visual camera (122) is communicatively connected with the data input end of the visual monitoring end wireless communication module (123); the visual monitoring end wireless communication module (123) communicates with the visual displacement measurement and analysis unit (3) via the corridor monitoring communication unit to exchange the target visual images shot by the visual camera (122).

3. A dam corridor visual displacement measurement system according to claim 2, characterized in that: The visual displacement monitor (12) further comprises a battery pack (124), wherein the battery pack (124) is installed in the housing (121), and after installation, the center of gravity of the visual displacement monitor (12) is located on a line connecting the geometric centers of the upper and lower sides of the housing (121), and the battery pack (124) supplies power to the visual camera (122) and the visual monitoring end wireless communication module (123).

4. A dam corridor visual displacement measurement system according to claim 3, characterized in that: The visual displacement measurement and analysis unit (3) comprises 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 a visual monitoring end wireless communication module (123) via an in-corridor monitoring communication unit to collect a target visual image captured by a visual camera (122); the memory (32) is communicatively connected to a 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 respectively communicatively connected to the memory (32); the visual analysis chip (33) calls a time-series-based target visual image to analyze target displacement; the data analysis chip (34) calculates a displacement measurement result based on a target displacement visual analysis result, and stores the displacement measurement result in the memory (32) for future reference.

5. A dam corridor visual displacement measurement system according to claim 4, characterized in that: 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 the displacement measurement result.

6. A dam corridor visual displacement measurement system according to claim 5, characterized in that: The corridor monitoring communication unit comprises a plurality of lane relay communication base stations (2), the plurality of lane relay communication base stations (2) being arranged at equal intervals in the target dam corridor (100), the plurality of lane relay communication base stations (2) being wirelessly connected in a self-organizing network, the lane relay communication base station (2) close to the visual displacement monitor (12) being wirelessly connected to the visual monitoring end wireless communication module (123), and the lane relay communication base station (2) close to the visual displacement measurement and analysis unit (3) being wirelessly connected to the displacement measurement and analysis end wireless communication unit (31).

7. A dam corridor visual displacement measurement system according to claim 6, characterized in that: The target device (14) comprises a support frame (141) and a target plate (142), wherein the support frame (141) is detachably mounted on the side wall of the target dam body gallery (100), and the target plate (142) is mounted on the support frame (141), and a target paper is pasted on the surface of the target plate (142), and the target paper surface faces the lens of the visual camera (122).

8. The dam corridor visual displacement measurement system according to claim 7, characterized in that: The inner wall arch top of the target dam body gallery (100) is provided with a monitoring point, the arch bottom is provided with two monitoring points, and the arch waist is symmetrically provided with four monitoring points. 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 body gallery (100).

9. A method for measuring visual displacement of a dam corridor, characterized in that: Using the dam corridor visual displacement measurement system as claimed in claim 8 to perform visual displacement measurement on a target dam corridor (100) comprises the following steps: Step 1, at set time intervals, the visual camera (122) captures the visual images of the target paper of the seven target devices (14), and transmits the images to the visual displacement measurement and analysis unit (3) through the corridor monitoring communication unit; Step 2, the visual displacement measurement and analysis unit (3) performs image preprocessing on the visual picture of the target paper; Step 3, the visual displacement measurement and analysis unit (3) uses a feature recognition algorithm to respectively extract the target paper feature points and the target paper feature point positions; Step 4: Assume that the coordinates of a feature point of the target paper at the tth time in the image are (x t ,y t ), the coordinates of the feature point of the target paper in the image at time t+1 are (x t+1 ,y t+1 ); Then the displacement of the target paper feature point on the x-axis is Δx=x t+1 -x t ; The displacement in the y-axis direction is: Δy = y t+1 -y t ; Total displacement of target paper feature points The total displacement of all target paper feature points is calculated, and the total displacement of all target paper feature points is displayed via a display (35).

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