A multi-power collection pile and a dynamic landform monitoring system

Abstract

The present invention discloses a multi-power acquisition pile and a dynamic geomorphology monitoring system. The multi-power acquisition pile includes: a bearing rod, a first deformation block, a hydrodynamic rod, a second deformation block, and a wind power rod, which are connected in sequence from bottom to top. The bearing rod is used to be inserted into the soil body. The elastic moduli of the hydrodynamic rod and the wind power rod are both greater than the elastic modulus of the first deformation block, and the elastic modulus of the first deformation block is greater than the elastic modulus of the second deformation block. The outer wall of the hydrodynamic rod is engraved with scales; a first electronic inclinometer is arranged at the inner top end of the hydrodynamic rod; a second electronic inclinometer is arranged at the inner top end of the wind power rod; a control module is arranged inside the hydrodynamic rod and is used to receive the data collected by the first electronic inclinometer and the second electronic inclinometer. The dynamic geomorphology monitoring system includes a processing unit, a video monitoring system above the soil body to be monitored, and a plurality of the above multi-power acquisition piles arranged in the soil body.

Description

Technical Field

[0001] The present application relates to the technical field of estuarine and coastal dynamic geomorphology research, and particularly relates to a multi-dynamic acquisition pile and a dynamic geomorphology monitoring system, which are applicable to the convenient and synchronous observation of dynamic geomorphology during the interaction process of complex multi-dynamic geomorphology. Background Art

[0002] The interaction of tidal flat dynamic geomorphology is the focus of estuarine and coastal sediment research. In the sea areas around the Hangzhou Bay, for example, there are many dynamic elements and strong dynamics. How to conveniently, synchronously, and accurately measure these dynamic elements and geomorphological changes is a difficult problem in the current basic data collection process.

[0003] In the past, one or more measuring instruments were often arranged separately for specific dynamic elements. If multi-dynamic parameters are observed for a long time, the measurement system is cumbersome, there are many devices, the cost is huge, and the reliability is low. At present, video monitoring combined with image processing technology is mostly used for real-time observation of coastal geomorphology. It has many defects. For the corresponding dynamic parameters, it can only measure the parameters that can be obtained by visual technology within the calibrated range. The measurement elements and parameters are not comprehensive enough and the accuracy is low. For the terrain, the influence of waves on the still water level caused by wind and waves is not considered. In strong wave sea areas, the vertical fluctuation amplitude of the water surface caused by waves on the tidal flat is more than 1 m. In the past, only the average value was simply used, and the run-up caused by waves is greater than the run-down. Using the average value to obtain the still water level often exceeds the actual water level, so it is not accurate. The intensity of wave action is different at different times, and the difference in the still water level is different. Therefore, there are large errors in the obtained beach elevation information.

[0004] In view of the problems in the long-term observation of traditional dynamic geomorphology, it is necessary to adopt convenient, synchronous, and accurate measurement technologies to improve the range of measurement element parameters and measurement accuracy, and obtain comprehensive and reliable tidal flat dynamic geomorphology data. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a multi-dynamic acquisition pile and a dynamic geomorphology monitoring system to solve the technical problems such as many devices, low accuracy, and high cost in the monitoring of beach dynamic geomorphology.

[0006] According to the first aspect of the embodiments of the present application, a multi-dynamic acquisition pile is provided, including:

[0007] A bearing rod, a first deformation block, a hydrodynamic rod, a second deformation block, and a wind dynamic rod connected in sequence from bottom to top. The bearing rod is used to be inserted into the soil body. The elastic moduli of the hydrodynamic rod and the wind dynamic rod are both greater than the elastic modulus of the first deformation block. The elastic modulus of the first deformation block is greater than the elastic modulus of the second deformation block. The outer wall of the hydrodynamic rod is engraved with scales;

[0008] A first electronic inclination sensor arranged at the inner top end of the hydrodynamic rod;

[0009] A second electronic tilt sensor is arranged at the inner top end of the wind power rod;

[0010] A control module is arranged inside the hydrodynamic rod and is used for receiving data collected by the first electronic tilt sensor and the second electronic tilt sensor.

[0011] Optionally, it further includes:

[0012] A data transmission module is arranged inside the hydrodynamic rod and is connected to the control module for transmitting data collected by the control module.

[0013] According to the second aspect of the embodiments of the present application, a dynamic geomorphic monitoring system is provided, including a processing unit, a video monitoring system above the soil to be monitored, and a plurality of multi-dynamic acquisition piles described in the first aspect of the present application arranged on the soil. The video monitoring system is used for monitoring the water-land interface and the water level scale of the hydrodynamic rod. Both the video monitoring system and the multi-dynamic acquisition piles are electrically connected to the processing unit. The processing unit is used to perform the following steps:

[0014] S1: Calculate wave dynamic parameters according to the instantaneous value of the data collected by the first electronic tilt sensor;

[0015] S2: Calculate tidal current dynamic parameters according to the average value of the data collected by the first electronic tilt sensor;

[0016] S3: Calculate the surging tide dynamic parameters according to the sudden change of the scale on the outer wall of the hydrodynamic rod and by using the sudden change value of the data collected by the first electronic tilt sensor;

[0017] S4: Calculate wind dynamic parameters according to the data collected by the second electronic tilt sensor in combination with the data collected by the first electronic tilt sensor;

[0018] S5: According to the images collected by the video monitoring system, in combination with the wave dynamic parameters and the wind dynamic parameters, adopt the edge detection technology and the method of combining to eliminate the fluctuation of the water-land interface to obtain the position of the beach contour line.

[0019] Optionally, calculating the wave dynamic parameters by using the instantaneous value of the data collected by the first electronic tilt sensor includes:

[0020] S11: Calculate the motion posture of the hydrodynamic rod through the instantaneous value of the data collected by the first electronic tilt sensor, and calculate the wave propagation direction, period, wave number and wave height according to the motion posture;

[0021] S12: Perform cross-spectrum analysis on the instantaneous values of the data of the first electronic tilt sensors of multiple multi-dynamic acquisition piles to calculate the wave direction spectrum;

[0022] Among them, the wave dynamic parameters include wave propagation direction, period, wave number, wave height, and wave direction spectrum.

[0023] Optionally, using the average value of the data collected by the first electronic inclination sensor, calculate the tidal current dynamic parameters, including:

[0024] S21: Take the average value of the data collected by the first electronic inclination sensor to eliminate the influence of waves;

[0025] S22: Calculate the average swing direction and average swing amplitude of the hydrodynamic rod through the average value;

[0026] S23: Calculate the tidal current direction according to the average swing direction;

[0027] S24: Calculate the tidal current velocity according to the average swing amplitude;

[0028] Among them, the tidal current dynamic parameters include tidal current direction and tidal current velocity.

[0029] Optionally, according to the sudden change of the outer wall scale of the hydrodynamic rod and the sudden change value of the data collected by the first electronic inclination sensor, calculate the tidal bore dynamic parameters, including:

[0030] S31: Calculate the tidal bore height through the change of the outer wall scale of the hydrodynamic rod before and after the tidal bore arrives;

[0031] S32: Calculate the attitude difference of the hydrodynamic rod before and after the tidal bore through the sudden change value of the data collected by the first electronic inclination sensor, and obtain the internal flow velocity intensity of the tidal bore according to the attitude difference before and after;

[0032] S33: Obtain the time difference of the tidal bore arriving at different multi-dynamic acquisition piles through the sudden change value of the data collected by the first electronic inclination sensor, and calculate the propagation speed and propagation direction of the tidal bore according to the time difference;

[0033] Among them, the tidal bore dynamic parameters include tidal bore height, internal flow velocity intensity of the tidal bore, propagation speed and direction of the tidal bore.

[0034] Optionally, according to the data collected by the second electronic inclination sensor combined with the data collected by the first electronic inclination sensor, calculate the wind dynamic parameters, including:

[0035] S41: According to the data of the second electronic inclination sensor, combined with the data of the first electronic inclination sensor, eliminate the influence of waves, tidal currents, and tidal bores, and calculate the motion attitude of the wind dynamic rod;

[0036] S42: Calculate the wind speed and wind direction according to the motion attitude of the wind dynamic rod;

[0037] Among them, the wind power parameters include wind speed and wind direction.

[0038] Optionally, an edge detection technology combination is used to eliminate the method of water-land interface boundary fluctuation to obtain the position of the beach contour line, including:

[0039] S51: Calculate the estimated slopes of different cross-sections by using the initial water-land boundary and the water-land interface boundary at the previous moment.

[0040] S52: According to the horizontal movement amplitude of the water surface line recorded by the video monitoring system on the cross-section, and using the zero-crossing method, count the characteristic value of the horizontal movement amplitude.

[0041] S53: Calculate the horizontal correction distance of the still water level on the cross-section line for each cross-section according to the estimated slopes of different cross-sections and the characteristic value of the horizontal movement amplitude.

[0042] S54: Use the horizontal correction distance to correct the still water level. Connect the corrected still water levels of each cross-section line to obtain a new contour line. Take the new contour line as the initial water-land boundary and repeat steps S51 - S53 to obtain a new contour line. Iteratively calculate in this way until the iteration converges, so as to obtain the final contour line position.

[0043] The technical solutions provided in the embodiments of the present application may include the following beneficial effects:

[0044] As can be seen from the above embodiments, the embodiments of the present invention overcome the problems of single and asynchronous monitoring of traditional beach dynamics and geomorphology through the technical solution of combining dynamic acquisition piles and video monitoring. Through the combination of image recognition technology and dynamic feedback technology, it is possible to conveniently and synchronously measure various dynamic parameters such as waves, tides, surges and wind, and the geomorphological changes, providing rich research materials for the interaction between beach dynamics and geomorphology.

[0045] In the embodiments of the present application, an electronic inclination sensor is used to measure the structural deformation to obtain the dynamic parameters of the forces of tides, waves and surges, overcoming the problem that traditional force measuring instruments are easily corroded and damaged when arranged in contact with seawater. By arranging the electronic inclination sensor inside the top of the rod, it is in a relatively dry and sealed space, improving the reliability and service life of the electronic instrument and facilitating maintenance and replacement.

[0046] The embodiments of the present invention adopt a method to eliminate the influence of wave-induced fluctuations at the water-land interface on the contour line, solving the problem of difficult determination of the still water level in traditional strong wave sea areas and eliminating the problem of the overestimated contour line calculated by the previous average method. The technical solution provided by the present invention obtains the still water level under wave action according to wave dynamics and beach slope, improving the elevation accuracy of the water-land interface boundary.

[0047] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Brief Description of the Drawings

[0048] The drawings herein are incorporated into and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0049] Figure 1 It is a schematic diagram of a multi - power acquisition pile shown according to an exemplary embodiment.

[0050] Figure 2 It is an internal sectional view of the hydrodynamic rod of a multi - power acquisition pile shown according to an exemplary embodiment.

[0051] Figure 3 It is an internal sectional view of the wind - driven rod of a multi - power acquisition pile shown according to an exemplary embodiment.

[0052] Figure 4 It is a schematic diagram of a dynamic geomorphic monitoring system according to an embodiment.

[0053] Figure 5 It is a graph of wave data measured by the first electronic inclinometer according to an embodiment.

[0054] Figure 6 It is a graph for calculating the dynamic wave propagation direction according to an embodiment.

[0055] Figure 7 It is a graph of tidal current data measured by the first electronic inclinometer according to an embodiment.

[0056] Figure 8 It is a graph for calculating the dynamic tidal current direction according to an embodiment.

[0057] Figure 9 It is a graph of tidal bore data measured by the first electronic inclinometer according to an embodiment.

[0058] Figure 10 It is a contour map measured by using the present invention according to an embodiment.

[0059] The reference numerals in the drawings are as follows:

[0060] 10. Multi - power acquisition pile;

[0061] 11. Bearing rod; 12. First deformation block; 13. Hydrodynamic rod; 14. Second deformation block; 15. Wind - driven rod; 16. First electronic inclinometer; 17. Second electronic inclinometer; 18. Control module;

[0062] 19. Data transmission module;

[0063] 20. Video monitoring system. Detailed Description of the Invention

[0064] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0065] As Figures 1 - 4 shown, an embodiment of the present invention provides a multi-power collection pile 10, which may include: a bearing rod 11, a first deformation block 12, a hydrodynamic rod 13, a second deformation block 14, a wind power rod 15, a first electronic inclination sensor 16, a second electronic inclination sensor 17, and a control module 18. The bearing rod 11, the first deformation block 12, the hydrodynamic rod 13, the second deformation block 14, and the wind power rod 15 are connected in sequence from bottom to top. The bearing rod 11 is used for inserting into the soil. The elastic moduli of the hydrodynamic rod 13 and the wind power rod 15 are both greater than the elastic modulus of the first deformation block 12. The elastic modulus of the first deformation block 12 is greater than the elastic modulus of the second deformation block 14. The outer wall of the hydrodynamic rod 13 is engraved with scales. The first electronic inclination sensor 16 is arranged at the inner top end of the hydrodynamic rod 13. The second electronic inclination sensor 17 is arranged at the inner top end of the wind power rod 15. The control module 18 is arranged inside the hydrodynamic rod 13 and is used for receiving the data collected by the first electronic inclination sensor 16 and the second electronic inclination sensor 17.

[0066] As can be seen from the above embodiments, the present application realizes different functions in different structural segments of a single pile, which facilitates the fabrication and installation of the structure. By setting the hydrodynamic rod 13 and the wind power rod 15 to respectively feedback the strengths of hydrodynamic and wind power actions, and using the changes of the electronic inclination sensors at the top ends of the power rods to obtain the motion conditions of the power rods under hydrodynamic and wind power actions, the electronic inclination sensors can be used to obtain both the strength and the direction of the motion of the power rods, reducing the arrangement of electronic instruments and improving the measurement efficiency.

[0067] In order to timely obtain and analyze power parameters, the multi-power collection pile 10 may further include a data transmission module 19. The data transmission module 19 may be arranged inside the hydrodynamic rod 13 and is connected to the control module 18 for transmitting the data received by the control module 18.

[0068] An embodiment of the present invention further provides a dynamic geomorphology monitoring system, including a processing unit, a video monitoring system 20 above the soil to be monitored, and a plurality of multi-dynamic acquisition piles 10 arranged on the soil. The video monitoring system 20 is used to monitor the water-land boundary and the water level scale of the water dynamic rod 13. Both the video monitoring system 20 and the multi-dynamic acquisition piles 10 are electrically connected to the processing unit. The processing unit is used to perform the following steps:

[0069] S1: Calculate wave dynamic parameters according to the instantaneous value of the data collected by the first electronic inclinometer 16;

[0070] S2: Calculate tidal current dynamic parameters according to the average value of the data collected by the first electronic inclinometer 16;

[0071] S3: Calculate the dynamic parameters of the tidal bore according to the sudden change of the scale on the outer wall of the water dynamic rod 13 and by using the sudden change value of the data collected by the first electronic inclinometer 16;

[0072] S4: Calculate wind dynamic parameters according to the data collected by the second electronic inclinometer 17 and in combination with the data collected by the first electronic inclinometer 16;

[0073] S5: According to the images collected by the video monitoring system 20, in combination with the wave dynamic parameters and the wind dynamic parameters, adopt the edge detection technology to combine the method of eliminating the fluctuation of the water-land boundary to obtain the position of the beach contour line.

[0074] As can be seen from the above embodiments, according to the characteristics of waves, tidal currents, tidal bores and wind power, the corresponding dynamic data is stripped from the data of the electronic inclinometer, and the corresponding dynamic parameters are inversely calculated by using the dynamic structure response principle after the dynamic action on the dynamic rod, so as to achieve the purpose of measuring multiple dynamics with a set of instruments.

[0075] Specifically, the processing unit is used to calculate and analyze the data collected by the two electronic inclinometers and the video monitoring system 20 to obtain dynamic parameters and geomorphological data. The processing unit can be a single-chip microcomputer or a PC computer, etc.

[0076] The video monitoring system 20 is used to monitor the water-land boundary and the water level scale of the water dynamic rod 13. It mainly consists of more than 2 cameras, which are arranged in the land area and shoot the observation area at different angles. A local three-dimensional coordinate system is established in the observation area. Through the three-dimensional coordinate information of different position markers, the projection and transmission of the markers in the camera, and the geometric relationship between the cameras, the three-dimensional space positioning parameters in the video monitoring system 20 are calibrated. The video monitoring system 20 calculates the three-dimensional space information of the object according to the images of the object in different cameras.

[0077] In a specific implementation of S1, calculating the wave dynamic parameters according to the instantaneous value of the data collected by the first electronic tilt sensor 16 may include the following sub-steps:

[0078] S11: Calculate the motion posture of the hydrodynamic rod 13 through the instantaneous value of the data collected by the first electronic tilt sensor 16, and calculate the wave propagation direction, period, wave number and wave height according to the motion posture;

[0079] Specifically, the video monitoring system 20 calculates the water depth D and the length D of the hydrodynamic rod 13 in the water body according to the hydrodynamic outer wall scale. 水 ;

[0080] The first electronic inclination sensor 16 has x, y, and z axis rotation angles α respectively. 1 , β 1 and γ 1 , α 1 0. β 1 0 are the initial angle values ​​when there is no power, γ 1 0 is the angle between the initial moment and the true north, then at a certain moment, the rotation angle change value of the first electronic inclination sensor 16 x, y, z axis is α 1 -α 1 0. β 1 -β 1 0 and γ 1 -γ 1 0. Then the instantaneous position of the top of the hydrodynamic rod 13 under the action of the power in the plane rectangular coordinate system centered on the initial position is: (D1sin(β 1 -β 1 0), D1sin(α 1 -α 1 0)), D1 is the length of the hydrodynamic rod.

[0081] According to the scattered points of the center point at each moment in the plane rectangular coordinate system, the least squares method is used to fit a straight line through the center of the circle. The slope of the straight line is K 1 , then the swing direction is artan(K 1 )+γ 1 0 is the direction of wave propagation.

[0082] The absolute value of the swing amplitude at the top of the hydrodynamic rod 13 at each moment is D1(sin(α 1 -α 1 0) 2 +sin(β 1 -β 1 0) 2 ) 0.5 , according to the quadrant position of the top position in the plane rectangular coordinate system, the swing amplitude is given, and the top hourly swing amplitude l is obtained1 , the swing eigenvalue l is obtained by using the method of crossing zero upwards. 1 w .

[0083] Using the hourly swing amplitude l 1 , the average swing period T of the hydrodynamic rod 13 is statistically calculated by using the method of crossing zero upwards, which is the average wave period T.

[0084] Using the wave dispersion relationship (2π / T) 2 / = 9.8k tanh(kD), the wave number k is obtained.

[0085] The wave height eigenvalue H w is:

[0086]

[0087] In the formula: i = 1, 2, 3... n, n is the number of vertical discretizations of the hydrodynamic rod 13; w is the cumulative frequency, generally 1%, 2%, 4%, 5%, 13%; ρ is the water density; R is the diameter of the hydrodynamic rod 13; t is the time; z is the height of the calculation point above the mud surface; EI1 is the stiffness of the first deformation block 12.

[0088] S12: By performing cross-spectrum analysis on the instantaneous values of the data of the first electronic inclinometers 16 of multiple said multi-power acquisition piles 10, the wave direction spectrum is calculated;

[0089] Specifically, the wave surface data is calculated from the data of the first electronic inclinometers 16 of multiple said multi-power acquisition piles 10 according to the principle of dynamic structure response, the cross-spectrum is obtained by Fourier transforming different wave surface data, and the wave direction spectrum is obtained by using the maximum likelihood method for the cross-spectrum.

[0090] Wherein the wave dynamic parameters include the wave propagation direction, period, wave number, wave height and wave direction spectrum.

[0091] In the specific implementation of S2, according to the average value of the data collected by the first electronic inclinometer 16, the tidal current dynamic parameters can be calculated, which may include the following sub-steps:

[0092] S21: Take the average value of the data collected by the first electronic inclinometer 16 to eliminate the influence of waves;

[0093] Specifically, the short-time average values of the rotation angles of the x, y, and z axes of the first electronic inclinometer 16 are α 1 m , β 1 m and γ 1 m, then the short - term average position of the top of the hydrodynamic rod 13 under the action of power in the plane rectangular coordinate system with the initial position as the center is: (D1sin(β 1 m -β 1 0), D1sin(α 1 m -α 1 0)).

[0094] S22: Calculate the average swing direction and average swing amplitude of the hydrodynamic rod 13 through the average value;

[0095] Specifically, according to the position of the short - term average center point in the plane rectangular coordinate system, connect it with the center of the circle, and the slope of this straight line is K 1 m , then the average swing direction is arctan(K 1 m ) + γ 1 0. The average swing amplitude is l 1 m = D1(sin(α 1 m -α 1 0) 2 +sin(β 1 m -β 1 0) 2 ) 0.5 .

[0096] S23: Calculate the tidal current direction according to the average swing direction;

[0097] Specifically, the tidal current method is the average swing direction.

[0098] S24: Calculate the tidal current velocity according to the average swing amplitude;

[0099] Specifically, use 0.183ρV 2 潮 R1D 水 2 / EI1 = l 1 m / D1, where ρ is the density of the water body, R1 is the radius of the hydrodynamic rod 13, and calculate the tidal current velocity Vtide. The tidal current dynamic parameters include the tidal current direction and the tidal current velocity.

[0100] In the specific implementation of S3, according to the sudden change of the scale on the outer wall of the hydrodynamic rod 13 and the sudden change value of the data collected by the first electronic inclinometer 16, calculate the tidal bore dynamic parameters, which may include the following sub - steps:

[0101] S31: Calculate the height of the tidal bore by the change in the scale on the outer wall of the hydrodynamic rod 13 before and after the arrival of the tidal bore.

[0102] Specifically, the scale on the outer wall of the hydrodynamic rod 13 before the tidal bore is D 前 , and the scale on the outer wall of the hydrodynamic rod 13 after the tidal bore is D 后 , and the height of the tidal bore H b = D 后 - D 前 .

[0103] S32: Calculate the attitude difference of the hydrodynamic rod 13 before and after the tidal bore from the mutation value of the data collected by the first electronic inclinometer 16, and obtain the internal flow velocity intensity of the tidal bore based on the attitude difference before and after.

[0104] Specifically, the mutation values of the rotation angles of the x, y, and z axes of the first electronic inclinometer 16 are α 1 v , β 1 v and γ 1 v , then the position of the top of the hydrodynamic rod 13 at the mutation position under the action of the force in the plane rectangular coordinate system with the initial position as the center is: (D1sin(β 1 v - β 1 m ), D1sin(α 1 v - α 1 m ), then the mutation swing amplitude is l 1 v = D1(sin(α 1 v - α 1 m ) 2 + sin(β 1 v - β 1 m ) 2 ) 0.5 . Using 0.183ρV 2 涌内 R1D 水 2 / EI1 = l 1 v / D1, calculate the internal flow velocity intensity V 涌内 .

[0105] S33: Obtain the time difference of the arrival of the tidal bore at different multi - power acquisition piles 10 from the mutation value of the data collected by the first electronic inclinometer 16, and calculate the propagation speed and propagation direction of the tidal bore based on the time difference.

[0106] Specifically, the tidal bore propagation speed and direction: from at least 3 or more of the multi-power acquisition piles 10, select 3 that are not on the same straight line to form 2 groups. The distances between the 2 multi-power acquisition piles 10 in the 2 groups are S1 and S2 respectively. The angles between the connections of the 2 multi-power acquisition piles 10 and the coordinate system are θ1 and θ2 respectively. The time intervals when the tidal bore reaches the 2 multi-power acquisition piles 10 in each group are dt1 and dt2 respectively. Then the tidal bore propagation speed V 涌 and the propagation direction μ are obtained through the following equations.

[0107] S1sin(θ1 - μ) = V 涌 dt1

[0108] S2sin(θ2 - μ) = V 涌 dt2

[0109] Wherein the tidal bore dynamic parameters include the tidal bore height, the internal flow velocity intensity of the tidal bore, the tidal bore propagation speed and direction.

[0110] In the specific implementation of S4, according to the data collected by the second electronic inclinometer 17 combined with the data collected by the first electronic inclinometer 16, calculating the wind dynamic parameters may include the following sub-steps:

[0111] S41: According to the data of the second electronic inclinometer 17, combined with the data of the first electronic inclinometer 16, eliminate the influence of waves, tides and tidal bores, and calculate the motion attitude of the wind power rod 15;

[0112] Specifically, the short-term average values of the rotation angles of the x, y, and z axes of the second electronic inclinometer 17 are α 2 , β 2 and γ 2 , and their initial values are α 2 0, β 2 0 and γ 2 0. Then, to remove the influence of the hydrodynamic rod 13 on α 2 -α 2 0 - α 1 +α 1 0, β 2 -β 2 0 - β 1 +β 1 0 and γ 2 -γ 2 0 - γ 1 +γ 1 0. Then the short-term average position of the top of the wind power rod 15 under the action of power in the plane rectangular coordinate system with the initial position as the center is: (D2sin(β 2 -β 20-β 1 +β 1 0), D2sin(α 2 -α 2 0-α 1 +α 1 0)), D2 is the length of the wind power rod 15, then the average swing amplitude is l 2 m = D2(sin(α 2 -α 2 0-α 1 +α 1 0) 2 + sin(β 2 -β 2 0-β 1 +β 1 0) 2 ) 0.5 。

[0113] S42: Calculate the wind speed and wind direction according to the motion posture of the wind power rod 15;

[0114] Specifically, according to the position of the short-term average center point in the plane rectangular coordinate system, connect it with the center of the circle, and the slope of this line is K 2 m , then the short-term average motion direction of the wind power rod 15 is arctan(K 2 m ) + γ 2 0, which is the wind direction.

[0115] Using 0.25ρ0V 2 风 R2D2 2 / EI2 = l 2 m / D2, ρ0 is the air density, R2 is the radius of the wind power rod 15, and the wind speed V can be calculated 风 。

[0116] Wherein the wind power parameter contains the wind speed and the wind direction.

[0117] In the specific implementation of S5, the method of using the edge detection technology combination to eliminate the fluctuation of the water-land surface boundary line to obtain the position of the beach contour line may include the following sub-steps:

[0118] S51: Calculate the estimated slope of different sections by using the initial water-land boundary line and the water-land surface boundary line at the previous moment;

[0119] Specifically, according to the initial intersection point (X0, Y0) of the water-land surface boundary line at the initial moment and the section line, and the intersection point of the contour line at the previous moment and this section line, the estimated slope M of the section is calculated in combination with the horizontal distance.

[0120] S52: Record the horizontal movement amplitude of the water surface line on the cross-section according to the video monitoring system 20, and use the zero-crossing method to statistically obtain the characteristic value of the horizontal movement amplitude;

[0121] Specifically, for each cross-section, obtain the intersection points of the water-land boundary line and the cross-section line at each moment within a finite time period. The horizontal position of the intersection points is recorded as (X, Y). According to the changes of the intersection points on the cross-section line, use the zero-crossing method to obtain the farthest L on both sides of each cross-section line from the initial intersection point u and the nearest L d , calculate the average value of the farthest L u average value and the nearest L d average value Obtain the horizontal amplitude of wave run-up and run-down for each cross-section

[0122] S53: Calculate the horizontal correction distance of the still water level on each cross-section line according to the estimated slope and the characteristic value of the horizontal movement amplitude of the different cross-sections;

[0123] Specifically, the calculation formula for the horizontal correction distance is:

[0124]

[0125] In the formula,

[0126] ; K’ is the wind speed influence coefficient.

[0127] S54: Use the horizontal correction distance to correct the still water level. Connect the corrected still water levels of each cross-section line to obtain a new contour line. Use the new contour line as the initial water-land boundary line and repeat steps S51 - S53 to obtain a new contour line, and perform iterative calculation in this way until the iteration converges, so as to obtain the final contour line position.

[0128] Specifically, repeat steps S51 - S53 until L s is less than 0.05 times R xy ud , then the contour line position can be obtained.

[0129] Example 1:

[0130] Place multiple dynamic acquisition piles 10 at the sea dyke front for dynamic acquisition to obtain the data of the first electronic inclination sensor 16 under the action of waves, tides and surges.

[0131] As Figure 5 shown, for the data of the first electronic inclination sensor 16 under the action of waves, using the wave dynamic parameter calculation method, the wave approaching direction is SE - SSE, see Figure 6, the average wave period is obtained as 2.2 s, and the significant wave height H 13％ is 0.35 m.

[0132] As Figure 7 shown, for the data of the first electronic tilt sensor 16 under the action of tidal current, by using the calculation method of tidal current dynamic parameters, the average tidal current direction is obtained as 278°, see Figure 8 , and the short-term average value of the tidal current velocity is obtained as 0.78 m / s.

[0133] As Figure 9 shown, for the data of the first electronic tilt sensor 16 under the action of tidal bore, by using the calculation method of tidal bore dynamic parameters, the internal velocity of the tidal bore is obtained as 1.37 m / s.

[0134] Embodiment 2:

[0135] Figure 10 For the horizontal positions of the 0 m isobath obtained by using the method of eliminating the fluctuation of the water-land interface line and without using this method in the foreshore of Qibao Seawall in Hangzhou, it can be seen from the figure that the influence of the water surface rise and fall caused by waves will cause the equal elevation to move towards the side with higher elevation. It is necessary to eliminate the wave influence to obtain relatively accurate beach contour lines.

[0136] It should be understood that the present application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A dynamic geomorphic monitoring system, characterized in that, It includes a processing unit, a video monitoring system above the soil to be monitored, and multiple multi-dynamic acquisition piles arranged in the soil. The video monitoring system is used to monitor the water-land surface boundary and the water level scale of the water dynamic rod. Both the video monitoring system and the multi-dynamic acquisition piles are electrically connected to the processing unit. The multi-dynamic acquisition piles include: A bearing rod, a first deformation block, a water dynamic rod, a second deformation block, and a wind dynamic rod connected in sequence from bottom to top. The bearing rod is used to insert into the soil. The elastic moduli of both the water dynamic rod and the wind dynamic rod are greater than the elastic modulus of the first deformation block, and the elastic modulus of the first deformation block is greater than the elastic modulus of the second deformation block. The outer wall of the water dynamic rod is engraved with scales; A first electronic inclinometer sensor arranged at the inner top of the water dynamic rod; A second electronic inclinometer sensor arranged at the inner top of the wind dynamic rod; A control module arranged inside the water dynamic rod for receiving data collected by the first electronic inclinometer sensor and the second electronic inclinometer sensor; A data transmission module arranged inside the water dynamic rod and connected to the control module for transmitting the data collected by the control module; The processing unit is used to perform the following steps: S1: Calculate the wave dynamic parameters according to the instantaneous value of the data collected by the first electronic inclinometer sensor; S2: Calculate the tidal current dynamic parameters according to the average value of the data collected by the first electronic inclinometer sensor; S3: Calculate the tidal bore dynamic parameters according to the sudden change of the scale on the outer wall of the water dynamic rod and using the sudden change value of the data collected by the first electronic inclinometer sensor; S4: Calculate the wind dynamic parameters according to the data collected by the second electronic inclinometer sensor and in combination with the data collected by the first electronic inclinometer sensor; S5: According to the images collected by the video monitoring system, in combination with the wave dynamic parameters and the wind dynamic parameters, adopt the edge detection technology combined with the method of eliminating the fluctuation of the water-land surface boundary to obtain the position of the beach contour line, including: S51: Calculate the estimated slopes of different sections using the initial water-land boundary and the water-land surface boundary at the previous moment; S52: Record the horizontal movement amplitude of the water surface line in the section according to the video monitoring system, and use the zero-crossing method to statistically calculate the characteristic value of the horizontal movement amplitude; S53: Calculate the horizontal correction distance of the still water level on the section line for each section according to the estimated slopes of different sections and the characteristic value of the horizontal movement amplitude; S54: Use the horizontal correction distance to correct the still water level. Connect the corrected still water levels of each section line to obtain a new contour line. Take the new contour line as the initial water-land boundary and repeat steps S51 - S53 to obtain a new contour line. Iteratively calculate in this way until the iteration converges, so as to obtain the final contour line position.

2. The dynamic geomorphic monitoring system according to claim 1, wherein Calculate the wave dynamic parameters using the instantaneous value of the data collected by the first electronic inclinometer sensor, including: S11: Calculate the motion posture of the water dynamic rod through the instantaneous value of the data collected by the first electronic inclinometer sensor, and calculate the wave propagation direction, period, wave number, and wave height according to the motion posture; S12: Conduct cross-spectrum analysis on the instantaneous values of the data from the first electronic inclinometers of multiple said multi-power acquisition piles to calculate the wave direction spectrum; Wherein the wave dynamic parameters include wave propagation direction, period, wave number, wave height, and wave direction spectrum.

3. A dynamic geomorphological monitoring system according to claim 1, characterized in that, Calculate the tidal current dynamic parameters by using the average value of the data collected by the first electronic inclinometer, including: S21: Take the average value of the data collected by the first electronic inclinometer to eliminate the influence of waves; S22: Calculate the average swing direction and average swing amplitude of the hydrodynamic rod through the average value; S23: Calculate the tidal current direction according to the average swing direction; S24: Calculate the tidal current velocity according to the average swing amplitude; Wherein the tidal current dynamic parameters include tidal current direction and tidal current velocity.

4. A dynamic geomorphic monitoring system according to claim 1, characterized in that, Calculate the tidal bore dynamic parameters according to the sudden change of the outer wall scale of the hydrodynamic rod and the sudden change value of the data collected by the first electronic inclinometer, including: S31: Calculate the tidal bore height through the change of the outer wall scale of the hydrodynamic rod before and after the arrival of the tidal bore; S32: Calculate the attitude difference of the hydrodynamic rod before and after the tidal bore through the sudden change value of the data collected by the first electronic inclinometer, and obtain the internal flow velocity intensity of the tidal bore according to the front and back attitude differences; S33: Obtain the time difference of the tidal bore arriving at different said multi-power acquisition piles through the sudden change value of the data collected by the first electronic inclinometer, and calculate the propagation speed and propagation direction of the tidal bore according to the time difference; Wherein the tidal bore dynamic parameters include tidal bore height, internal flow velocity intensity of the tidal bore, propagation speed and direction of the tidal bore.

5. A dynamic geomorphic monitoring system according to claim 1, characterized in that, Calculate the wind dynamic parameters according to the data collected by the second electronic inclinometer in combination with the data collected by the first electronic inclinometer, including: S41: According to the data of the second electronic inclinometer, in combination with the data of the first electronic inclinometer, eliminate the influence of waves, tidal currents and tidal bores, and calculate the motion attitude of the wind dynamic rod; S42: Calculate the wind speed and wind direction according to the motion attitude of the wind dynamic rod; Wherein the wind dynamic parameters include wind speed and wind direction.

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