Power monitoring, regulating and controlling system and method used in operation process of ship lock miter gate

Abstract

The invention discloses a power monitoring regulation and control system and method used in the operation process of a ship lock miter gate, and relates to the technical field of ship locks. The method comprises the following steps: firstly, monitoring the vibration state of each structural member of the ship lock miter gate, calculating a rigidity evaluation value of the ship lock miter gate, adjusting an electric control signal of a proportioning pump according to the rigidity evaluation value, and optimizing the non-deformability of a gate body structure; secondly, the dynamic stress of the door body is monitored, the dynamic stress safety evaluation value of the ship lock miter gate is obtained, the output frequency of the motor is adjusted through the frequency converter, and structural overload can be avoided; and finally, the back pull rod prestress monitoring and adjusting module adjusts the prestress of the back pull rod in combination with the vibration state, the dynamic stress and other characteristic data, so that the stability and the structural safety of the door body are kept. Structural damage caused by excessive vibration or stress overload can be avoided, the service life of equipment is prolonged, and stable operation of a ship lock system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of ship locks, and specifically to a dynamic monitoring and regulation system and method for the operation of miter gates of ship locks. Background Art

[0002] As a key facility in water conservancy projects, the miter gates of ship locks are responsible for controlling water flow and ship passage. During their operation, they are affected by various external forces, such as water flow, wind pressure, and the self-weight of the gate body. These factors may cause vibrations, deformations, and stress changes in the gate body. With the continuous changes in the operating environment and load conditions of the miter gates of ship locks, how to evaluate their operating status in real time and accurately and perform dynamic regulation has become an urgent need to ensure their safe and stable operation.

[0003] The prior art, such as a ship lock miter gate structure intelligent loading test system and method announced in the invention patent with the publication number of CN117071521B, includes a gate, a self-reaction frame for fixing the gate, a rotating actuator acting on the gate body to rotate it around the rotating shaft at a set angular velocity, a loading actuator that can achieve static and dynamic composite loading on the gate, a dual-channel control system that can achieve electro-hydraulic servo closed-loop control coordination loading for the rotation and loading channels, and a dynamic signal test and analysis system that can perform multi-channel synchronous sampling and achieve distributed acquisition and monitoring of the test system.

[0004] The prior art, such as a monitoring system for the working condition of the pillow support pads of a miter gate announced in the invention patent with the publication number of CN103758098A, belongs to the field of measurement technology; the system includes a pillow support pad for bearing the closing pressure of the gate; a resistance strain gauge for measuring the strain of the pillow support pad; a wiring device for connecting the resistance strain gauge and the resistance strain gauge; a water level measuring instrument for measuring the upstream water level near the gate and the water level in the lock chamber; a data acquisition module for acquiring data; a data analysis module for processing data; an instruction input module for receiving user instructions; and an early warning module for prompting abnormal working states of the pillow support pads.

[0005] Currently, there are relatively large problems in the application of the miter gate back tie rod technology of ship locks: the prestress tensioning work of the back tie rod is underestimated. After the installation of the miter gate is completed, the importance of the back tie rod tensioning during the later operation of the ship lock is not realized, and the on-site prestress construction process of the back tie rod is ignored, resulting in the failure to implement the back tie rod prestress tensioning work in place, frequent leakage and vibration phenomena of the navigable miter gate, and affecting the normal operation of the waterway. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a dynamic monitoring and regulation system and method for the operation of miter gates of ship locks, which can effectively solve the problems involved in the above background art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A dynamic monitoring and regulation system and method for the operation of miter gates of a ship lock, including a vibration state monitoring module, which is used to monitor the vibration state data of each structural member during the operation of the miter gates of the ship lock, obtain the stiffness evaluation value of the miter gates of the ship lock, and control the electronic control signal of the proportional pump according to the stiffness evaluation value of the miter gates of the ship lock.

[0008] A dynamic stress monitoring and regulation module, which is used to monitor the dynamic stress of each structural member during the operation of the miter gates of the ship lock, obtain the dynamic stress safety evaluation value of the miter gates of the ship lock, and adjust the output frequency of the motor through a frequency converter according to the dynamic stress safety evaluation value of the miter gates of the ship lock.

[0009] A back tie rod prestress monitoring and regulation module, which is used to obtain the back tie rod prestress regulation value of the miter gates of the ship lock according to the stiffness evaluation value of the miter gates of the ship lock and the dynamic stress safety evaluation value of the miter gates of the ship lock, and in combination with the characteristic data during the operation of the miter gates of the ship lock, and adjust the back tie rod prestress of the miter gates of the ship lock according to the back tie rod prestress regulation value of the miter gates of the ship lock.

[0010] Further, the vibration state data of each structural member during the operation of the miter gates of the ship lock includes the maximum vibration acceleration in the vertical direction and the maximum vibration acceleration in the water flow direction of each structural member at the time points of opening the miter gates of the ship lock and the gate body in place, and the vertical vibration displacement and the water flow direction vibration displacement of each structural member from the time of opening the miter gates of the ship lock to the time when the gate body is in place.

[0011] Further, the process of obtaining the stiffness evaluation value of the miter gates of the ship lock is as follows: Monitor the water flow pulsation pressure during the operation of the miter gates of the ship lock and the resonance frequency of the miter gate body in each preset monitoring period, and count the actual vibration frequency of the miter gates of the ship lock in each monitoring period.

[0012] Extract the maximum vibration acceleration in the vertical direction and the maximum vibration acceleration in the water flow direction of each structural member at the time points of opening the miter gates of the ship lock and the gate body in place, and the vertical vibration displacement and the water flow direction vibration displacement of each structural member from the time of opening the miter gates of the ship lock to the time when the gate body is in place, and extract the actual vibration frequency of the miter gates of the ship lock in each monitoring period. After processing, obtain the stiffness evaluation value of the miter gates of the ship lock. The stiffness evaluation value of the miter gates of the ship lock represents the degree of anti-deformation of the gate body structure of the miter gates of the ship lock under the action of external loads.

[0013] Further, the process of controlling the electronic control signal of the proportional pump according to the stiffness evaluation value of the miter gate of the ship lock is as follows: Based on the stiffness evaluation value of the miter gate of the ship lock, compare it with the set stiffness evaluation threshold of the miter gate of the ship lock. If the stiffness evaluation value of the miter gate of the ship lock is lower than the stiffness evaluation threshold of the miter gate of the ship lock, then use the difference between the stiffness evaluation threshold of the miter gate of the ship lock and the stiffness evaluation value of the miter gate of the ship lock as the control signal of the proportional pump, and control the electronic control signal of the proportional valve according to the control signal of the proportional pump to control the output flow and pressure of the proportional pump. If the stiffness evaluation value of the miter gate of the ship lock is higher than or equal to the stiffness evaluation threshold of the miter gate of the ship lock, there is no need to control the electronic control signal of the proportional pump.

[0014] Further, the process of monitoring the dynamic stress of each structural member during the operation of the miter gate of the ship lock to obtain the dynamic stress safety evaluation value of the miter gate of the ship lock is as follows: Count the dynamic stress values of each structural member during the operation of the miter gate of the ship lock in each monitoring period, and count the number of times that the dynamic stress values of each structural member during the operation of the miter gate of the ship lock in each monitoring period are higher than the preset stress safety threshold, which is recorded as the stress overloading times of each structural member during the operation of the miter gate of the ship lock in each monitoring period.

[0015] Extract the maximum stress value and the minimum stress value of each structural member during the operation of the miter gate of the ship lock in each monitoring period, and perform a difference process to obtain the dynamic stress change amount of each structural member during the operation of the miter gate of the ship lock in each monitoring period.

[0016] Extract the stress overloading times of each structural member during the operation of the miter gate of the ship lock in each monitoring period and the dynamic stress change amount of each structural member during the operation of the miter gate of the ship lock in each monitoring period, and obtain the dynamic stress safety evaluation value of the miter gate of the ship lock through processing. The dynamic stress safety evaluation value of the miter gate of the ship lock represents the quantitative evaluation of the stress fluctuation degree of the miter gate of the ship lock during operation.

[0017] Further, the process of adjusting the output frequency of the motor through the frequency converter according to the dynamic stress safety evaluation value of the miter gate of the ship lock is as follows: Extract the dynamic stress safety evaluation value of the miter gate of the ship lock, and compare it with the set dynamic stress safety evaluation threshold of the miter gate of the ship lock. If the dynamic stress safety evaluation value of the miter gate of the ship lock is lower than the dynamic stress safety evaluation threshold of the miter gate of the ship lock, then reduce the output frequency of the motor through the frequency converter. If the dynamic stress safety evaluation value of the miter gate of the ship lock is higher than or equal to the dynamic stress safety evaluation threshold of the miter gate of the ship lock, then do not adjust the output frequency of the motor.

[0018] Further, the process of obtaining the prestress adjustment value of the back tie rods of the miter gate of the lock is as follows: Obtain the characteristic data during the operation of the miter gate of the lock, including the wind pressure and water pressure in the area where the miter gate of the lock is located, and extract the dynamic stress safety evaluation value of the miter gate of the lock and the dynamic stress safety evaluation value of the miter gate of the lock. After processing, obtain the prestress evaluation value of the back tie rods of the miter gate of the lock. The prestress evaluation value of the back tie rods of the miter gate of the lock represents the degree of dynamic load borne during the operation of the miter gate of the lock.

[0019] Compare the prestress evaluation value of the back tie rods of the miter gate of the lock with the back tie rod prestress adjustment values corresponding to each interval of the prestress evaluation value of the back tie rods of the preset miter gate of the lock to obtain the back tie rod prestress adjustment value of the miter gate of the lock.

[0020] Further, the process of adjusting the prestress of the back tie rods of the miter gate of the lock according to the back tie rod prestress adjustment value of the miter gate of the lock is as follows: According to the back tie rod prestress adjustment value of the miter gate of the lock, and compare it with the prestress of the back tie rods of the preset miter gate of the lock. Perform a difference process on the back tie rod prestress adjustment value of the miter gate of the lock and the prestress of the back tie rods of the miter gate of the lock to obtain the back tie rod prestress adjustment difference of the miter gate of the lock. Compare the back tie rod prestress adjustment difference of the miter gate of the lock with the pressures of the hydraulic systems corresponding to each interval of the preset back tie rod prestress adjustment difference of the miter gate of the lock to obtain the pressure of the hydraulic system of the miter gate of the lock, and adjust the prestress of the back tie rods of the miter gate of the lock according to the pressure of the hydraulic system of the miter gate of the lock.

[0021] Further, the specific analysis conditions for the prestress evaluation value of the back tie rods of the miter gate of the lock are as follows:

[0022]

[0023] In the formula, K represents the prestress evaluation value of the back tie rods of the miter gate of the lock, H represents the stiffness evaluation value of the miter gate of the lock, R represents the dynamic stress safety evaluation value of the miter gate of the lock, Y represents the wind pressure in the area where the miter gate of the lock is located, G represents the water pressure in the area where the miter gate of the lock is located, ΔY represents the correction factor corresponding to the set wind pressure, ΔG represents the correction factor corresponding to the set water pressure, β 1 represents the weight factor corresponding to the set stiffness evaluation value of the miter gate of the lock, β 2 represents the weight factor corresponding to the set dynamic stress safety evaluation value of the miter gate of the lock, β 3 represents the weight factor corresponding to the set wind pressure, β 4 represents the weight factor corresponding to the set water pressure.

[0024] The second aspect of the present invention also provides a method for dynamic monitoring and regulation during the operation of miter gates of a ship lock, including monitoring the vibration states of various structural components during the operation of the miter gates of the ship lock, obtaining a stiffness evaluation value of the miter gates of the ship lock, and controlling the electric control signal of a proportional pump according to the stiffness evaluation value of the miter gates of the ship lock.

[0025] Monitor the dynamic stress of various structural components during the operation of the miter gates of the ship lock, obtain a dynamic stress safety evaluation value of the miter gates of the ship lock, and adjust the output frequency of the motor through a frequency converter according to the dynamic stress safety evaluation value of the miter gates of the ship lock.

[0026] According to the stiffness evaluation value of the miter gates of the ship lock and the dynamic stress safety evaluation value of the miter gates of the ship lock, and combining with the characteristic data during the operation of the miter gates of the ship lock, obtain a back tie rod prestress adjustment value of the miter gates of the ship lock, and adjust the prestress of the back tie rod of the miter gates of the ship lock according to the back tie rod prestress adjustment value of the miter gates of the ship lock.

[0027] The present invention has the following beneficial effects:

[0028] (1) By providing a dynamic monitoring and regulation system and method for the operation of miter gates of a ship lock, first, the present invention monitors the vibration states of various structural components of the miter gates of the ship lock, calculates the stiffness evaluation value of the miter gates of the ship lock, and adjusts the electric control signal of the proportional pump accordingly to optimize the anti-deformation ability of the gate structure; second, monitors the dynamic stress of the gate body to obtain a dynamic stress safety evaluation value of the miter gates of the ship lock, and adjusts the output frequency of the motor through a frequency converter to ensure that the movement process of the ship lock gate is smoother and avoid overloading of the structure; finally, the back tie rod prestress monitoring and adjustment module combines the vibration state, dynamic stress and other characteristic data to adjust the prestress of the back tie rod, so as to maintain the stability and structural safety of the gate body. Real-time monitoring and adjustment of the dynamic state of the miter gates of the ship lock improve its operation safety, stability and efficiency, avoid structural damage caused by excessive vibration or stress overload, extend the service life of the equipment, and ensure the smooth operation of the ship lock system.

[0029] (2) By obtaining the stiffness evaluation value of the miter gates of the ship lock and then adjusting the stiffness of the gate body, the present invention helps to ensure that the gate body structure does not undergo excessive deformation during operation, can adjust the stiffness and movement state of the gate body in real time, optimize the operation performance of the miter gates of the ship lock, reduce structural damage caused by vibration and deformation, improve the stability and safety of the ship lock system, and ensure efficient and safe operation.

[0030] (3) By obtaining the dynamic stress safety evaluation value of the miter gate of the lock, adjusting the output frequency of the inverter motor, reducing the load on the gate body, and avoiding excessive stress, the present invention can dynamically monitor the stress change of the miter gate of the lock, optimize the output frequency of the motor according to the actual situation, reduce the risk of excessive stress, ensure the miter gate of the lock operates in a safe and stable state, and thus improve the reliability and efficiency of the system.

[0031] (4) By obtaining the prestress evaluation value of the back tie rod of the miter gate of the lock and adjusting the pressure of the hydraulic system based on this difference to further adjust the prestress of the back tie rod, the present invention can accurately control the prestress of the back tie rod of the miter gate of the lock to adapt to the change of external load, thereby improving the stability and safety of the miter gate of the lock, optimizing the dynamic response during the operation of the gate body, ensuring that the gate body structure is always in the best working state under changing environmental conditions, reducing system failures and potential risks, and improving the safety and efficiency of the overall system.

[0032] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is the overall schematic diagram of the system module of the present invention;

[0034] Figure 2 is the curve of the prestress evaluation value of the back tie rod of the miter gate of the lock of the present invention;

[0035] Figure 3 is the schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0038] Please refer to Figure 1As shown in the figure, the embodiment of the present invention provides a power monitoring and control system for the operation of miter gates of a ship lock, including a vibration state monitoring module, which is used to monitor the vibration states of various structural components during the operation of the miter gates of the ship lock, obtain the stiffness evaluation value of the miter gates of the ship lock, and control the electric control signal of the proportional pump according to the stiffness evaluation value of the miter gates of the ship lock.

[0039] It should be noted that the miter gate of the ship lock is a spatial thin-walled steel structure. When the miter gate is freely suspended under its own weight, it will produce a large torsional deformation that warps upstream. Moreover, during the working process of the miter gate, it mainly relies on the three-point constraints of the bottom pivot, the top pivot, and the opening and closing points, and its stiffness is significantly small. Setting backstays on the miter gate and applying prestress to the backstays can effectively improve the torsional stiffness and overall stiffness of a single miter gate leaf, and reduce the torsional deformation of the gate. According to the requirements of the ship lock design specifications, the calculated prestress value must be applied after the installation of the miter gate to ensure that the left and right leafs of the miter gate are seamlessly closed and the deformation of the portal column of a single miter gate meets the specification requirements; in addition, tensioning the prestress in the backstay can significantly improve the overall structural stiffness of a single miter gate leaf. Through this measure, the overall vibration and noise during the operation of the miter gate can be reduced. Since the prestress of the backstay mainly acts on the main frame of the miter gate, its effect on enhancing the stiffness of local components of the miter gate, such as the panel, diaphragm plate, longitudinal diaphragm plate, etc., is limited.

[0040] It should be noted that the various structural components include the main cross beam, vertical beam, diaphragm plate, panel, top pivot A rod and B rod, and opening and closing rod of the miter gate. The working process of the miter gate includes opening the gate, closing the gate, filling the lock chamber with water, and discharging water from the lock chamber. In this embodiment, the opening and closing working processes are taken as examples. Dynamic strain gauges, acceleration sensors, and vibration displacement pickups are arranged on each structural component (main beam, vertical beam, A rod and B rod, opening and closing rod) of the lower lock head miter gate (left gate). The vibration magnitudes of the above-mentioned monitored parts are measured, and the real-time dynamic signals of dynamic strain and acceleration are collected and sent to an analyzer. Using the dynamic test equipment and the supporting dynamic problem analysis software, the dynamic signals of each measuring point are analyzed in the time domain and frequency domain to monitor the vibration states and dynamic stresses of various structural components during the operation of the miter gates of the ship lock.

[0041] It should be noted that the vibration state data of each structural component during the operation of the miter gate of the ship lock and the dynamic stress of each structural component during the operation of the miter gate of the ship lock are measured through the vibration measurement points of the miter gate, including acceleration measurement points, dynamic stress measurement points, and velocity measurement points. Among them, in this embodiment, the acceleration measurement points include: a total of 9 acceleration measurement points, 3 underwater and 6 above water, arranged horizontally and vertically along the main beam of the miter gate to detect the vibration intensity, vibration frequency, and vibration law of the main structural components of the miter gate. The panel and diaphragm of the miter gate are parts with relatively small stiffness of the miter gate. Some panels and diaphragms are selected to arrange acceleration measurement points to evaluate the vibration magnitude of the weak stiffness parts of the miter gate. The dynamic stress measurement points include: a total of 12 dynamic stress measurement points of the miter gate body are arranged, mainly arranged horizontally and vertically on the main beam of the miter gate to monitor the magnitude and law of the dynamic stress borne by the main stressed components of the miter gate under various operating conditions of the ship lock; 2 dynamic strain gauges are arranged on each of the top pivot A rod and B rod, 1 on the top surface and 1 on the side surface to monitor the magnitude and change law of the dynamic stress of the A rod and B rod under various operating conditions of the miter gate. The dynamic displacement measurement points include: the dynamic displacement measurement points are arranged on the above-water part of the miter gate, arranged horizontally and vertically along the main beam of the miter gate to detect the vibration intensity, vibration frequency, and vibration law of the main structural components of the miter gate from the vibration displacement. Vibration displacement measurement points are also arranged on the panel and diaphragm of the miter gate.

[0042] The dynamic stress monitoring and adjustment module is used to monitor the dynamic stress of each structural component during the operation of the miter gate of the ship lock, obtain the dynamic stress safety evaluation value of the miter gate of the ship lock, and adjust the output frequency of the motor through the frequency converter according to the dynamic stress safety evaluation value of the miter gate of the ship lock.

[0043] The back tie rod prestress monitoring and adjustment module is used to obtain the back tie rod prestress adjustment value of the miter gate of the ship lock according to the stiffness evaluation value of the miter gate of the ship lock and the dynamic stress safety evaluation value of the miter gate of the ship lock, and in combination with the characteristic data during the operation of the miter gate of the ship lock, and adjust the back tie rod prestress of the miter gate of the ship lock according to the back tie rod prestress adjustment value of the miter gate of the ship lock.

[0044] Specifically, the vibration state data of each structural component during the operation of the miter gate of the ship lock include the maximum vibration acceleration in the vertical direction and the maximum vibration acceleration in the water flow direction of each structural component at the time points of the miter gate of the ship lock starting to open and the gate body reaching the position, and the vertical vibration displacement and the water flow direction vibration displacement of each structural component at the time point from the miter gate of the ship lock starting to open to the gate body reaching the position.

[0045] Specifically, to obtain the stiffness evaluation value of the miter gate of the ship lock, the specific analysis process is as follows: monitor the water flow pulsating pressure during the operation of the miter gate of the ship lock and the resonance frequency of the miter gate body in each preset monitoring period, and count the actual vibration frequency of the miter gate of the ship lock in each monitoring period.

[0046] Extract the maximum vibration acceleration of each structural component in the vertical direction, the maximum vibration acceleration in the water flow direction, the vertical vibration displacement and the water flow direction vibration displacement of each structural component from the time point of starting to open the miter gate of the lock to the time point when the gate body is in place, and extract the actual vibration frequency of the miter gate of the lock in each monitoring period. After processing, obtain the stiffness evaluation value of the miter gate of the lock. The stiffness evaluation value of the miter gate of the lock represents the degree of anti-deformation of the gate body structure of the miter gate of the lock under the action of external loads.

[0047] It should be noted that the maximum vibration acceleration in the vertical direction represents the maximum acceleration borne by each structural component of the miter gate of the lock in the vertical direction during the process of opening the gate to the time when the gate body is in place. This value reflects the intensity of vibration in the vertical direction during the operation of the miter gate of the lock, especially when opening the gate and the gate body is in place. It can be monitored by vibration sensors, and the maximum value of the vibration acceleration in the vertical direction during this time period is taken. The maximum vibration acceleration in the water flow direction is also a measurement of the vibration acceleration of each structural component of the miter gate of the lock, but it refers to the maximum vibration acceleration in the water flow direction. The vertical vibration displacement reflects the displacement of each structural component of the miter gate of the lock in the vertical direction during the process of opening the gate to the time when the gate body is in place. This value can be measured by vibration sensors or displacement sensors and represents the displacement amount generated by the structure due to vibration in this direction. The vibration displacement in the water flow direction refers to the vibration displacement generated by each structural component of the miter gate of the lock in the water flow direction.

[0048] It should be noted that the actual vibration frequency of the miter gate of the lock is recorded in real time through a data acquisition system from the vibration signal captured by the acceleration sensor and is usually saved in the form of a time series. The collected vibration signal is subjected to a fast Fourier transform to convert the vibration data in the time domain into spectral data in the frequency domain. The peak frequency on the spectrogram corresponds to the actual vibration frequency of the miter gate of the lock.

[0049] It should be noted that the specific analysis conditions for the stiffness evaluation value of the miter gate of the lock are:

[0050]

[0051] In the formula, H represents the stiffness evaluation value of the miter gate of the lock, a j→1 represents the maximum vibration acceleration in the vertical direction of the j-th structural component at the time point of starting to open the miter gate of the lock, a j→2 represents the maximum vibration acceleration in the water flow direction of the j-th structural component at the time point when the gate body of the miter gate of the lock is in place, bz j represents the vertical vibration displacement of the j-th structural component from the time point of starting to open the miter gate of the lock to the time point when the gate body is in place, bs j represents the vibration displacement in the water flow direction of the j-th structural component from the time point of starting to open the miter gate of the lock to the time point when the gate body is in place, p iDenote the actual vibration frequency of the miter gate of the ship lock in the \(i\)th monitoring period, \(\Delta a\) j1 Denote the reference maximum vibration acceleration in the vertical direction of the \(j\)th structural member at the set gate opening time point of the miter gate of the ship lock, \(\Delta a\) j2 Denote the reference maximum vibration acceleration in the water flow direction of the \(j\)th structural member at the set gate opening time point of the miter gate of the ship lock, \(\Delta b_z\) j Denote the defined vibration displacement in the vertical direction of the \(j\)th structural member from the time when the miter gate of the ship lock starts to open until the gate body reaches the in - place position, \(\Delta b_s\) j Denote the defined vibration displacement in the water flow direction of the \(j\)th structural member from the time when the miter gate of the ship lock starts to open until the gate body reaches the in - place position, \(\Delta P\) denotes the natural vibration frequency of the set miter gate, \(c\) 1 Denote the correction factor corresponding to the set maximum vibration acceleration in the vertical direction, \(c\) 2 Denote the correction factor corresponding to the set maximum vibration acceleration in the water flow direction, \(c\) 3 Denote the correction factor corresponding to the set vibration displacement in the vertical direction, \(c\) 4 Denote the correction factor corresponding to the set vibration displacement in the water flow direction, \(c\) 5 Denote the correction factor corresponding to the set actual vibration frequency. \(i\) represents the number of each monitoring period, \(i = 1,2,3,\cdots,n\), \(n\) represents the total number of monitoring periods, \(j\) represents the number of each structural member, \(j = 1,2,3,\cdots,m\), and \(m\) represents the total number of structural members.

[0052] It should be noted that during the operation of the miter gate of a ship lock, the vibration characteristics of each structural member and parameters such as the fluctuating water pressure at the time points of gate opening and the gate body reaching the position do not exist independently. There are close interactions and dependencies among them. For example, the vibration acceleration is not only affected by the stiffness of the gate body itself but is also closely related to the fluctuating water pressure. A relatively large fluctuating water pressure usually causes a relatively large vibration acceleration, especially at the moment of gate opening and the gate body reaching the position. In addition, a relatively high vibration acceleration will cause the structure to have relatively large displacements and deformations, further affecting the vibration characteristics of the flow velocity and the flow direction. And the vibration displacement is closely related to the vibration acceleration. When the vibration acceleration is relatively large, the vibration displacement is usually also relatively large, indicating that the gate body has relatively large deformations. In addition, the vibration displacement in the flow direction is related to the fluctuating water pressure. A relatively large fluctuating water pressure may cause a relatively large vibration displacement, especially during the process of water intake or water discharge. A relatively large vibration displacement will increase the deformation of the structure, further affecting the stiffness evaluation and operation stability of the gate. A relatively large vibration acceleration usually means a relatively large flow displacement and a relatively high flow velocity, which may increase the flow resistance of the fluid. The increase in flow resistance may cause the working efficiency of the gate to decrease and affect the performance of the entire ship lock system. In addition, the vibration acceleration and vibration displacement not only directly affect the structural response of the gate but also indirectly affect the distribution of the fluctuating water pressure. A relatively large vibration displacement may cause the contact area between the gate and the water flow to increase, thus affecting the pulsation mode of the water flow. Conversely, the change in the fluctuating water pressure will have a feedback effect on the vibration acceleration and the flow displacement. During the operation of the miter gate of a ship lock, the vibration characteristics (including vibration acceleration and vibration displacement) at the time of gate opening and the gate body reaching the position are intertwined with factors such as the fluctuating water pressure and the flow resistance, jointly affecting the structural response, energy conversion efficiency, and system stability of the gate. By comprehensively analyzing the interactions among these parameters, the working state of the miter gate of the ship lock can be adjusted more accurately.

[0053] In a specific embodiment, the value range of the correction factor corresponding to the maximum vibration acceleration in the vertical direction is usually between 0 and 1. When in use, the correction factor corresponding to the maximum vibration acceleration in the vertical direction can be directly obtained from the database of the miter gate monitoring of the ship lock. The corresponding relationship between this correction factor and the maximum vibration acceleration in the vertical direction is determined by a pre-set mapping table. For example, a mapping table is constructed between the maximum vibration acceleration in the vertical direction and the correction factor corresponding to the maximum vibration acceleration in the vertical direction. By inputting the real-time detected maximum vibration acceleration in the vertical direction into the mapping table, the corresponding correction factor can be quickly obtained, thus helping to optimize the stiffness adjustment and vibration control process of the miter gate of the ship lock and helping the safe and stable operation of the ship lock.

[0054] In a specific embodiment, the value range of the correction factor corresponding to the maximum vibration acceleration in the water flow direction is usually between 0 and 1, and it can be directly obtained from the database. The corresponding relationship between this correction factor and the maximum vibration acceleration in the water flow direction is determined by a pre-set mapping table. For example, a mapping table is constructed between the maximum vibration acceleration in the water flow direction and the correction factor corresponding to the maximum vibration acceleration in the water flow direction. By obtaining the value of the maximum vibration acceleration in the water flow direction in real time and comparing it with the mapping table, the corresponding correction factor can be quickly obtained, which helps to more accurately adjust the vibration control strategy of the miter gate of the lock and optimize the operating state.

[0055] In a specific embodiment, for the correction factor corresponding to the vibration displacement in the vertical direction, its value range is usually also between 0 and 1, and it is set through the relationship between the mapping table and the vibration displacement in the vertical direction. For example, a mapping table is constructed between the vibration displacement in the vertical direction and the correction factor corresponding to the vibration displacement in the vertical direction. The vibration displacement value detected in real time can be input into the mapping table to obtain the corresponding correction factor. This correction factor can help better evaluate the stiffness and anti-deformation ability of the miter gate of the lock, and then optimize the stability of the gate body.

[0056] In a specific embodiment, for the correction factor corresponding to the vibration displacement in the water flow direction, its value range is usually also between 0 and 1, and it is set through the relationship between the mapping table and the vibration displacement in the water flow direction. For example, a mapping table is constructed between the vibration displacement in the water flow direction and the correction factor corresponding to the vibration displacement in the water flow direction. By inputting the vibration displacement in the water flow direction detected in real time and combining it with the mapping table, the correction factor corresponding to the vibration displacement in the water flow direction can be obtained. This process can effectively help adjust the vibration control strategy of the miter gate of the lock, so as to ensure its stable and safe operation.

[0057] In a specific embodiment, the value range of the correction factor for the actual vibration frequency is usually between 0 and 1. When in use, the correction factor corresponding to the water flow pulsation pressure can be directly obtained from the database of the miter gate monitoring of the lock. The corresponding relationship between this correction factor and the water flow pulsation pressure is determined by a pre-set mapping table. For example, a mapping table is constructed between the actual vibration frequency and the correction factor corresponding to the actual vibration frequency. By inputting the actual vibration frequency detected in real time into the mapping table, the correction factor corresponding to the actual vibration frequency can be obtained, which helps to adjust the working state of the lock and ensure the stability of the gate body and the water flow control effect.

[0058] It should be noted that, as shown in Table 1, Table 1 shows the example data of the measured maximum vibration acceleration of the miter gate, which lists the measured maximum vibration acceleration of the miter gate (unit: g). The operation process of the miter gate of the ship lock includes opening the gate, closing the gate, discharging water from the lock chamber, filling water into the lock chamber, and the maximum vibration acceleration in the vertical direction and the maximum vibration acceleration in the water flow direction of each structural member at the time points of opening the gate for the downstream ship to enter and the gate body in place.

[0059] Table 1 Example data of the measured maximum vibration acceleration of the miter gate

[0060]

[0061]

[0062] Specifically, the electric control signal of the proportional pump is controlled according to the stiffness evaluation value of the miter gate of the ship lock. The specific process is as follows: according to the stiffness evaluation value of the miter gate of the ship lock, and comparing it with the set stiffness evaluation threshold of the miter gate of the ship lock. If the stiffness evaluation value of the miter gate of the ship lock is lower than the stiffness evaluation threshold of the miter gate of the ship lock, then the difference between the stiffness evaluation threshold of the miter gate of the ship lock and the stiffness evaluation value of the miter gate of the ship lock is used as the control signal of the proportional pump, and the electric control signal of the proportional valve is controlled according to the control signal of the proportional pump to control the output flow and pressure of the proportional pump. If the stiffness evaluation value of the miter gate of the ship lock is higher than or equal to the stiffness evaluation threshold of the miter gate of the ship lock, then the electric control signal of the proportional pump does not need to be controlled.

[0063] It should be noted that the electric control signal of the proportional valve is controlled according to the control signal of the proportional pump, and compared with the adjusted output flow and adjusted pressure corresponding to each interval of the control signal of the proportional pump stored in the database to obtain the adjusted output flow and adjusted pressure of the proportional pump. The output flow and pressure of the proportional pump increase, and the adjusted flow and pressure are transmitted to the actuator through the hydraulic pipeline to control the action of the miter gate of the ship lock.

[0064] Specifically, the dynamic stress of each structural member during the operation of the miter gate of the ship lock is monitored to obtain the dynamic stress safety evaluation value of the miter gate of the ship lock. The specific process is as follows: count the dynamic stress values of each structural member during the operation of the miter gate of the ship lock in each monitoring period, count the number of times that the dynamic stress values of each structural member during the operation of the miter gate of the ship lock in each monitoring period are higher than the preset stress safety threshold, and record it as the stress overloading times of each structural member during the operation of the miter gate of the ship lock in each monitoring period.

[0065] Extract the maximum stress value and minimum stress value of each structural member during the operation of the miter gate of the ship lock in each monitoring period, and perform difference processing to obtain the dynamic stress change amount of each structural member during the operation of the miter gate of the ship lock in each monitoring period.

[0066] Extract the number of stress overloading times of each structural component during the operation of the miter gate of the ship lock in each monitoring period, and the change amount of the dynamic stress of each structural component during the operation of the miter gate of the ship lock in each monitoring period. After processing, the dynamic stress safety evaluation value of the miter gate of the ship lock is obtained. The dynamic stress safety evaluation value of the miter gate of the ship lock represents the quantitative evaluation of the stress fluctuation degree of the miter gate of the ship lock during operation.

[0067] It should be noted that the specific analysis conditions for the dynamic stress safety evaluation value of the miter gate of the ship lock are as follows:

[0068]

[0069] In the formula, R represents the dynamic stress safety evaluation value of the miter gate of the ship lock, represents the maximum stress value of the jth structural component during the operation of the miter gate of the ship lock in the ith monitoring period, represents the minimum stress value of the jth structural component during the operation of the miter gate of the ship lock in the ith monitoring period, ΔE j→i represents the change amount of the dynamic stress of the jth structural component during the operation of the miter gate of the ship lock in the ith monitoring period, U j→i represents the number of stress overloading times of the jth structural component during the operation of the miter gate of the ship lock in the ith monitoring period, E M represents the set reference maximum stress value, γ 1 represents the correction factor corresponding to the set maximum stress value, E m represents the set reference minimum stress value, γ 2 represents the correction factor corresponding to the set minimum stress value, ΔE represents the set reference dynamic stress change amount, γ 3 represents the correction factor corresponding to the set dynamic stress change amount, ΔU represents the set defined number of stress overloading times, γ 4 represents the correction factor corresponding to the set number of stress overloading times. i represents the number of each monitoring period, i = 1, 2, 3,..., n, n represents the total number of monitoring periods, j represents the number of each structural component, j = 1, 2, 3,..., m, and m represents the total number of structural components.

[0070] In a specific embodiment, the four parameters of the maximum stress value, minimum stress value, dynamic stress change amount, and stress overload times of each structural member during the operation of the miter gate of the ship lock do not exist independently in each monitoring cycle. There are close interrelationships among them, and they jointly act on the operation stability and safety of the miter gate of the ship lock. The maximum stress value and the minimum stress value reflect the stress change range of the miter gate of the ship lock during operation. A relatively high maximum stress value usually indicates that the gate body or component has borne a large external load at certain moments, while a relatively low minimum stress value may reflect that there is partial load reduction or relaxation in the gate body structure during operation. The dynamic stress change amount measures the fluctuation amplitude of the stress value over time. A large dynamic stress change amount usually means that the miter gate of the ship lock has experienced severe stress fluctuations during the opening, closing, and water flow pulsation processes, which may have an adverse impact on the structure of the gate body and increase the risk of damage. For example, when the maximum stress value increases, it is often accompanied by an increase in the dynamic stress change amount, indicating that the gate body may be subjected to a large external impact or water flow change, resulting in severe stress fluctuations. In this case, if the stress overload times increase frequently, it may indicate that there is a risk of structural fatigue or instability in the miter gate of the ship lock, affecting its long-term service life and safety. By comprehensively analyzing these interrelated parameters, the operation state of the miter gate of the ship lock can be evaluated more accurately, the adjustment strategy can be adjusted in a timely manner, the control scheme can be optimized, the stable operation of the miter gate of the ship lock can be ensured, the risk of structural damage can be reduced, and its service life can be effectively extended.

[0071] In a specific embodiment, the value range of the correction factor corresponding to the maximum stress value is usually set between 0 and 1, and is set through the relationship with the maximum stress value in the mapping table. For example, a mapping table is constructed between the maximum stress value and the correction factor corresponding to the maximum stress value. By obtaining the maximum stress value from the monitoring system and comparing it with the preset mapping relationship, inputting the real-time detected maximum stress value, and combining the mapping table, the correction factor corresponding to the maximum stress value can be obtained.

[0072] In a specific embodiment, the value range of the correction factor corresponding to the minimum stress value is usually set between 0 and 1, and is set through the relationship with the minimum stress value in the mapping table. For example, a mapping table is constructed between the minimum stress value and the correction factor corresponding to the minimum stress value. By obtaining the minimum stress value from the monitoring system and comparing it with the preset mapping relationship, inputting the real-time detected minimum stress value, and combining the mapping table, the correction factor corresponding to the maximum stress value can be obtained.

[0073] In a specific embodiment, the value range of the correction factor corresponding to the dynamic stress change is usually set between 0 and 1, and is set through the relationship with the dynamic stress change in the mapping table. For example, a mapping table is constructed between the dynamic stress change and the correction factor corresponding to the dynamic stress change. By obtaining the dynamic stress change from the monitoring system and comparing it with the preset mapping relationship, inputting the real-time detected dynamic stress change, and combining with the mapping table, the correction factor corresponding to the dynamic stress change can be obtained.

[0074] In a specific embodiment, the value range of the correction factor corresponding to the stress overloading times is usually set between 0 and 1, and is set through the relationship with the stress overloading times in the mapping table. For example, a mapping table is constructed between the stress overloading times and the correction factor corresponding to the stress overloading times. By obtaining the stress overloading times from the monitoring system and comparing it with the preset mapping relationship, inputting the real-time detected stress overloading times, and combining with the mapping table, the correction factor corresponding to the stress overloading times can be obtained.

[0075] It should be noted that during the operation of the miter gate in this embodiment, the dynamic stress change reflects the change of stress with time during the process from the starting stress when the miter gate is fully closed to the ending stress when it is fully opened. The difference between the maximum and minimum stress values during this process is extracted as the dynamic stress change during the operation of the miter gate.

[0076] Specifically, the output frequency of the motor is adjusted by the frequency converter according to the dynamic stress safety evaluation value of the ship lock miter gate. The specific process is as follows: extract the dynamic stress safety evaluation value of the ship lock miter gate, and compare it with the set dynamic stress safety evaluation threshold of the ship lock miter gate. If the dynamic stress safety evaluation value of the ship lock miter gate is lower than the dynamic stress safety evaluation threshold of the ship lock miter gate, the output frequency of the motor is reduced by the frequency converter. If the dynamic stress safety evaluation value of the ship lock miter gate is higher than or equal to the dynamic stress safety evaluation threshold of the ship lock miter gate, the output frequency of the motor is not adjusted.

[0077] It should be noted that during the operation of the miter gate of the ship lock, the output frequency of the motor directly affects the movement speed and acceleration of the miter gate of the ship lock. To help ensure the safe operation of the miter gate of the ship lock, a frequency converter is used to control the output frequency of the motor, and the frequency of the motor is dynamically adjusted according to the dynamic stress safety evaluation value of the miter gate of the ship lock. If the dynamic stress safety evaluation value of the miter gate of the ship lock is lower than the dynamic stress safety evaluation threshold of the miter gate of the ship lock, it indicates that the current stress level is relatively low, which means the gate body is running relatively smoothly and will not cause a large load on the structure. At this time, the frequency converter will reduce the output frequency of the motor according to the control signal. This can slow down the rotation speed of the motor, reduce the running speed, thereby reducing the dynamic stress of the miter gate of the ship lock and the burden on the structural members, and ensuring long-term stability. If the dynamic stress safety evaluation value of the miter gate of the ship lock is higher than or equal to the dynamic stress safety evaluation threshold of the miter gate of the ship lock, it means that the miter gate of the ship lock is in a state of high load or large stress fluctuation. At this time, there is no need to adjust the output frequency of the motor. At this time, the motor will maintain the current frequency to ensure that the miter gate of the ship lock can maintain a stable movement state.

[0078] It should be noted that by appropriately reducing the output frequency of the motor, the movement speed of the miter gate of the ship lock can be slowed down, thereby effectively reducing the structural stress fluctuation caused by the movement and avoiding excessive vibration and unnecessary damage caused by rapid start or stop.

[0079] Specifically, the back tie rod prestress adjustment value of the miter gate of the ship lock is obtained. The specific process is as follows: Obtain the characteristic data during the operation of the miter gate of the ship lock, including the wind pressure and water pressure in the affiliated area where the miter gate of the ship lock operates, and extract the dynamic stress safety evaluation value of the miter gate of the ship lock and the dynamic stress safety evaluation value of the miter gate of the ship lock. After processing, the back tie rod prestress evaluation value of the miter gate of the ship lock is obtained. The back tie rod prestress evaluation value of the miter gate of the ship lock represents the degree of dynamic load borne during the operation of the miter gate of the ship lock.

[0080] It should be noted that wind pressure = shape coefficient × height coefficient × wind vibration coefficient × basic wind pressure. In this embodiment, for the lower lock head miter gate, the gate shape coefficient is taken as 1.3, the height coefficient is taken as 1.1, the wind vibration coefficient is taken as 1.0, and the basic wind pressure is 0.35 kN / m2 = 0.00035 MPa. Then the wind pressure = 1.3 × 1.1 × 1.0 × 0.00035 = 0.0005 MPa. For the upper lock head miter gate, the gate shape coefficient is taken as 1.3, the height coefficient is taken as 0.88, the wind vibration coefficient is taken as 1.0, and the basic wind pressure is 0.35 kN / m2 = 0.00035 MPa. Then the wind pressure = 1.3 × 0.88 × 1.0 × 0.00035 = 0.0004 MPa.

[0081] Compare the prestress evaluation value of the counter-bracing rod of the miter gate of the lock with the corresponding prestress adjustment value of each interval of the prestress evaluation value of the counter-bracing rod of the miter gate of the lock preset, and obtain the prestress adjustment value of the counter-bracing rod of the miter gate of the lock.

[0082] It should be noted that the wind pressure refers to the change in the pressure of the wind when the miter gate of the lock is exposed to the wind force, which will affect the vibration and stress state of the gate body. The monitoring of the wind pressure helps to understand the external dynamic load on the gate body, especially in the case of storms or strong winds. The self-weight of the gate body is an important part of the static load of the miter gate of the lock. The influence of the self-weight on the gate body structure is continuous, especially during the opening and closing process, when the self-weight of the gate body acts together with the water flow pressure. The water pressure refers to the change in the water pressure that the miter gate of the lock will be affected by under the action of the water flow. Especially during the opening and closing process, the pressure difference between the water flows in front of and behind the gate body will generate dynamic stress.

[0083] It should be noted that install high-precision water pressure sensors or differential pressure sensors at the key positions of the miter gate of the lock (such as the bottom of the gate body, the top of the gate body, both sides, etc.). The sensors can monitor the water flow, pressure distribution and pressure change in real time, and take the average water pressure of each monitoring point within each monitoring period as the water pressure of the operating sub-region of the miter gate of the lock.

[0084] Specifically, adjust the prestress of the counter-bracing rod of the miter gate of the lock according to the prestress adjustment value of the counter-bracing rod of the miter gate of the lock. The specific process is as follows: According to the prestress adjustment value of the counter-bracing rod of the miter gate of the lock, and compare it with the preset prestress of the counter-bracing rod of the miter gate of the lock, perform a difference processing on the prestress adjustment value of the counter-bracing rod of the miter gate of the lock and the prestress of the counter-bracing rod of the miter gate of the lock to obtain the prestress adjustment difference of the counter-bracing rod of the miter gate of the lock. Compare the prestress adjustment difference of the counter-bracing rod of the miter gate of the lock with the pressure of the hydraulic system corresponding to each interval of the preset prestress adjustment difference of the counter-bracing rod of the miter gate of the lock to obtain the pressure of the hydraulic system of the miter gate of the lock, and adjust the prestress of the counter-bracing rod of the miter gate of the lock according to the pressure of the hydraulic system of the miter gate of the lock.

[0085] Specifically, the prestress evaluation value of the counter-bracing rod of the miter gate of the lock, the specific analysis conditions are:

[0086]

[0087] In the formula, K represents the prestress evaluation value of the counter-bracing rod of the miter gate of the lock, H represents the stiffness evaluation value of the miter gate of the lock, R represents the dynamic stress safety evaluation value of the miter gate of the lock, Y represents the wind pressure in the operating sub-region of the miter gate of the lock, G represents the water pressure in the operating sub-region of the miter gate of the lock, ΔY represents the defined wind pressure in the operating sub-region of the miter gate of the lock set, ΔG represents the defined water pressure in the operating sub-region of the miter gate of the lock set, β 1Denote the weight factor corresponding to the set stiffness evaluation value of the miter gate of the lock, β 2 Denote the weight factor corresponding to the set dynamic stress safety evaluation value of the miter gate of the lock, β 3 Denote the weight factor corresponding to the set wind pressure, β 4 Denote the weight factor corresponding to the set water pressure.

[0088] It should be noted that the weight factor corresponding to the stiffness evaluation value of the miter gate of the lock represents the influence degree of the stiffness evaluation value of the miter gate of the lock on the adjustment value of the miter gate of the lock in each monitoring period. This corresponding relationship is determined by a pre-set mapping relationship. For example, the stiffness evaluation value of the miter gate of the lock forms a mapping set with the weight factors corresponding to the preset adjustment values of the miter gate of the lock in each monitoring period obtained from the database. Input the real-time monitored stiffness evaluation value of the miter gate of the lock into the mapping set to obtain the corresponding weight factor of the stiffness evaluation value, so as to optimize the system adjustment.

[0089] It should be noted that the weight factor corresponding to the dynamic stress safety evaluation value of the miter gate of the lock represents the influence degree of the dynamic stress safety evaluation value of the miter gate of the lock on the adjustment value of the miter gate of the lock in each monitoring period. This corresponding relationship is also determined by a pre-set mapping relationship. For example, the dynamic stress safety evaluation value of the miter gate of the lock forms a mapping set with the weight factors corresponding to the preset adjustment values of the miter gate of the lock in each monitoring period obtained from the database. By inputting the real-time monitored dynamic stress safety evaluation value into the mapping set, the system can obtain the corresponding weight factor of the dynamic stress safety evaluation value, so as to adjust the adjustment process and ensure the safe operation of the miter gate of the lock.

[0090] It should be noted that the weight factor corresponding to the wind pressure represents the influence degree of the magnitude of the wind pressure on the miter gate of the lock on the adjustment value of the miter gate of the lock in each monitoring period. This relationship is determined by a pre-set mapping relationship. For example, the value of the wind pressure forms a mapping set with the adjustment value corresponding to the preset wind pressure obtained from the database. When the real-time wind pressure data is input into the mapping set, the system can quickly calculate the corresponding weight factor of the wind pressure to help optimize the adjustment process and reduce the influence of the wind force on the structure of the miter gate of the lock.

[0091] It should be noted that the weight factor corresponding to the water pressure represents the influence degree of the water pressure borne by the miter gate of the lock under the action of the water flow on the adjustment value of the miter gate of the lock in each monitoring period. This corresponding relationship is determined by a pre-set mapping relationship. For example, the water pressure forms a mapping set with the adjustment value corresponding to the preset water pressure obtained from the database. Input the real-time monitored water pressure value into the mapping set, and the system can obtain the weight factor corresponding to the water pressure and make appropriate adjustments accordingly to maintain the safe and stable operation of the miter gate of the lock.

[0092] As Figure 2 shown Figure 2 in the figure, it is the curve of the prestress evaluation value of the back tie rod of the miter gate of the lock of the present invention, specifically representing the prestress evaluation value of the back tie rod of the miter gate corresponding to the wind pressure in different operation membership regions of the miter gate of the lock. The horizontal axis represents the dynamic stress safety evaluation value of the miter gate of the lock, and the vertical axis represents the prestress evaluation value of the back tie rod of the miter gate of the lock. Three groups of different example parameters are defined in the figure, corresponding to different situations of the three curves, represented by solid line, dashed line and dotted line respectively, and the corresponding curve labels are a, b, c. When the wind pressure in the operation membership region of the miter gate of the lock is 50, the schematic diagram of the prestress evaluation value of the back tie rod of the miter gate of the lock is as shown by curve a. When the wind pressure in the operation membership region of the miter gate of the lock is 100, the schematic diagram of the prestress evaluation value of the back tie rod of the miter gate of the lock is as shown by curve b. When the wind pressure in the operation membership region of the miter gate of the lock is 150, the schematic diagram of the prestress evaluation value of the back tie rod of the miter gate of the lock is as shown by curve c. Among them, the stiffness evaluation value of the miter gate of the lock is 10, the water pressure in the operation membership region of the miter gate of the lock is 20, the defined wind pressure in the operation membership region of the miter gate of the lock is 155, the defined water pressure in the operation membership region of the miter gate of the lock is 26, the weight factor corresponding to the stiffness evaluation value is 0.3, the weight factor corresponding to the dynamic stress safety evaluation value is 0.4, the weight factor corresponding to the wind pressure is 0.5, and the weight factor corresponding to the water pressure is 0.6.

[0093] As Figure 3 shown, the second aspect of the present invention also provides a dynamic monitoring and control method for the operation of the miter gate of the lock, including monitoring the vibration state of each structural member during the operation of the miter gate of the lock, obtaining the stiffness evaluation value of the miter gate of the lock, and controlling the electric control signal of the proportional pump according to the stiffness evaluation value of the miter gate of the lock.

[0094] Monitoring the dynamic stress of each structural member during the operation of the miter gate of the lock, obtaining the dynamic stress safety evaluation value of the miter gate of the lock, and adjusting the output frequency of the motor through the frequency converter according to the dynamic stress safety evaluation value of the miter gate of the lock.

[0095] According to the stiffness evaluation value and the dynamic stress safety evaluation value of the miter gate of the lock, and combining with the characteristic data during the operation of the miter gate of the lock, obtaining the adjustment value of the prestress of the back tie rod of the miter gate of the lock, and adjusting the prestress of the back tie rod of the miter gate of the lock according to the adjustment value of the prestress of the back tie rod of the miter gate of the lock.

[0096] It should be noted that the frequency converter affects the output flow and pressure of the proportional pump by controlling the motor speed. When operating at a low frequency, the flow and pressure of the proportional pump may be low, and vice versa. The frequency converter adjusts the output frequency of the motor, affecting the pressure change of the hydraulic system, thereby affecting the prestress adjustment of the back tie rod. When the operating load is high, the frequency converter may reduce the motor frequency, and the proportional pump will correspondingly adjust the output flow and pressure to help the stable operation of the miter gate of the lock. Secondly, the adjustment function of the frequency converter may also affect the load demand of the proportional pump. When the speed of the miter gate of the lock decreases, the proportional pump may reduce the pressure output. During the operation of the miter gate of the lock, the frequency converter controls the output power of the motor by adjusting the frequency of the motor to ensure that the hydraulic system can provide sufficient flow and pressure.

[0097] It should be noted that a power monitoring and control system for the operation of the miter gate of a lock also includes a database for storing the stiffness evaluation threshold of the miter gate of the lock, the stress safety threshold, the dynamic stress safety evaluation threshold of the miter gate of the lock, the back tie rod prestress adjustment value corresponding to each interval of the back tie rod prestress evaluation value of the miter gate of the lock, the back tie rod prestress of the miter gate of the lock, the pressure of the hydraulic system corresponding to each interval of the back tie rod prestress adjustment difference of the miter gate of the lock, the defined wind pressure in the operating area of the miter gate of the lock, the defined water pressure in the operating area of the miter gate of the lock, the weight factor corresponding to the stiffness evaluation value of the miter gate of the lock, the weight factor corresponding to the dynamic stress safety evaluation value of the miter gate of the lock, the weight factor corresponding to the wind pressure, the weight factor corresponding to the water pressure, the reference maximum stress value, the correction factor corresponding to the maximum stress value, the reference minimum stress value, the correction factor corresponding to the minimum stress value, the reference dynamic stress change amount, the correction factor corresponding to the dynamic stress change amount, the defined stress overload times, the correction factor corresponding to the stress overload times, the reference maximum vibration acceleration in the vertical direction of the jth structural member at the starting time point of the miter gate of the lock, the reference maximum vibration acceleration in the water flow direction of the jth structural member at the starting time point of the miter gate of the lock, the defined vibration displacement in the vertical direction of the jth structural member at the time point when the miter gate of the lock is opened to the position of the gate body in place, the defined vibration displacement in the water flow direction of the jth structural member at the time point when the miter gate of the lock is opened to the position of the gate body in place, the reference amplitude value of the water flow pulsation pressure, the correction factor corresponding to the maximum vibration acceleration in the vertical direction, the correction factor corresponding to the maximum vibration acceleration in the water flow direction, the correction factor corresponding to the vibration displacement in the vertical direction, the correction factor corresponding to the vibration displacement in the water flow direction, and the correction factor corresponding to the water flow pulsation pressure.

[0098] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0099] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A power monitoring and control system for the operation of a ship lock miter gate, characterized in that: include: The vibration state monitoring module is used to monitor the vibration state data of each structural component during the operation of the ship lock miter gate, obtain the stiffness evaluation value of the ship lock miter gate, and control the electric control signal of the proportional pump according to the stiffness evaluation value of the ship lock miter gate; The dynamic stress monitoring and adjustment module is used to monitor the dynamic stress of each structural component during the operation of the ship lock miter gate, obtain the dynamic stress safety assessment value of the ship lock miter gate, and adjust the output frequency of the motor through the frequency converter according to the dynamic stress safety assessment value of the ship lock miter gate; The back-tie rod prestress monitoring and adjustment module is used to obtain the back-tie rod prestress adjustment value of the lock miter gate according to the stiffness evaluation value of the lock miter gate and the dynamic stress safety evaluation value of the lock miter gate, combined with the characteristic data during the operation of the lock miter gate, and adjust the back-tie rod prestress of the lock miter gate according to the back-tie rod prestress adjustment value of the lock miter gate.

2. The power monitoring and control system for the operation of the ship lock miter gate according to claim 1 is characterized in that: The vibration state data of each structural component during the operation of the ship lock miter gate include the maximum vibration acceleration of each structural component in the vertical direction at the time points when the ship lock miter gate is opened and the door body is in place, the maximum vibration acceleration in the water flow direction, and the vertical vibration displacement and water flow direction vibration displacement of each structural component from the time point when the ship lock miter gate is opened to the time point when the door body is in place.

3. The power monitoring and control system for the operation of a ship lock miter gate according to claim 1 is characterized in that: The stiffness evaluation value of the lock miter gate is obtained, and the specific analysis process is as follows: In each preset monitoring cycle, the water flow pulsation pressure and the resonance frequency of the miter gate body of the ship lock are monitored during the operation of the ship lock miter gate, and the actual vibration frequency of the ship lock miter gate in each monitoring cycle is counted; The maximum vibration acceleration of each structural component in the vertical direction when the ship lock miter gate is opened and the gate body is in place, the maximum vibration acceleration in the water flow direction, the vertical vibration displacement and the vibration displacement in the water flow direction of each structural component from the time when the ship lock miter gate is opened to the time when the gate body is in place are extracted, and the actual vibration frequency of the ship lock miter gate in each monitoring period is extracted. The stiffness evaluation value of the ship lock miter gate is obtained after processing. The stiffness evaluation value of the ship lock miter gate represents the degree of deformation resistance of the door body structure of the ship lock miter gate under external loads.

4. The power monitoring and control system for the operation of a ship lock miter gate according to claim 1 is characterized in that: The specific process of controlling the electric control signal of the proportional pump according to the stiffness evaluation value of the lock miter gate is as follows: According to the stiffness evaluation value of the lock miter gate, it is compared with the set stiffness evaluation threshold of the lock miter gate. If the stiffness evaluation value of the lock miter gate is lower than the stiffness evaluation threshold of the lock miter gate, the difference between the stiffness evaluation threshold of the lock miter gate and the stiffness evaluation value of the lock miter gate is used as the control signal of the proportional pump, and the electric control signal of the proportional valve is controlled according to the control signal of the proportional pump to control the output flow and pressure of the proportional pump. If the stiffness evaluation value of the lock miter gate is higher than or equal to the stiffness evaluation threshold of the lock miter gate, there is no need to control the electric control signal of the proportional pump.

5. The power monitoring and control system for the operation of a ship lock miter gate according to claim 1 is characterized in that: The dynamic stress of each structural component is monitored during the operation of the ship lock miter gate to obtain the dynamic stress safety assessment value of the ship lock miter gate. The specific process is as follows: The dynamic stress value of each structural component during the operation of the ship lock miter gate in each monitoring period is counted, and the number of times the dynamic stress value of each structural component during the operation of the ship lock miter gate in each monitoring period is higher than the preset stress safety threshold is counted, which is recorded as the number of stress overloads of each structural component during the operation of the ship lock miter gate in each monitoring period; Extract the maximum stress value and the minimum stress value of each structural component during the operation of the ship lock miter gate in each monitoring period, and perform difference processing to obtain the dynamic stress variation of each structural component during the operation of the ship lock miter gate in each monitoring period; The number of stress overloads of each structural component during the operation of the ship lock miter gate in each monitoring period and the change in dynamic stress of each structural component during the operation of the ship lock miter gate in each monitoring period are extracted, and the dynamic stress safety assessment value of the ship lock miter gate is obtained after processing. The dynamic stress safety assessment value of the ship lock miter gate represents a quantitative assessment of the stress fluctuation degree of the ship lock miter gate during operation.

6. The power monitoring and control system for the operation of a ship lock miter gate according to claim 1 is characterized in that: The specific process of adjusting the output frequency of the motor through the frequency converter according to the dynamic stress safety assessment value of the ship lock miter gate is as follows: The dynamic stress safety assessment value of the lock miter gate is extracted and compared with the set dynamic stress safety assessment threshold of the lock miter gate. If the dynamic stress safety assessment value of the lock miter gate is lower than the dynamic stress safety assessment threshold of the lock miter gate, the output frequency of the motor is reduced through the frequency converter. If the dynamic stress safety assessment value of the lock miter gate is higher than or equal to the dynamic stress safety assessment threshold of the lock miter gate, the output frequency of the motor is not adjusted.

7. The power monitoring and control system for the operation of a ship lock miter gate according to claim 1 is characterized in that: The specific process of obtaining the prestress adjustment value of the back tie rod of the ship lock miter gate is as follows: Acquire characteristic data during the operation of the ship lock miter gate, including wind pressure and water pressure in the area where the ship lock miter gate operates, and extract the dynamic stress safety assessment value of the ship lock miter gate and the dynamic stress safety assessment value of the ship lock miter gate, and obtain the prestress assessment value of the back tie rod of the ship lock miter gate after processing, wherein the prestress assessment value of the back tie rod of the ship lock miter gate indicates the degree of dynamic load borne by the ship lock miter gate during operation; The back tie rod prestress evaluation value of the ship lock miter gate is compared with the back tie rod prestress adjustment value corresponding to each interval of the preset ship lock miter gate back tie rod prestress evaluation value to obtain the back tie rod prestress adjustment value of the ship lock miter gate.

8. The power monitoring and control system for the operation of a ship lock miter gate according to claim 1 is characterized in that: The prestress of the back tie rod of the ship lock miter gate is adjusted according to the prestress adjustment value of the back tie rod of the ship lock miter gate, and the specific process is: According to the prestressed adjustment value of the back tie rod of the lock miter gate, and compared with the preset prestressed adjustment value of the back tie rod of the lock miter gate, the prestressed adjustment value of the back tie rod of the lock miter gate and the prestressed adjustment value of the back tie rod of the lock miter gate are subjected to difference processing to obtain the prestressed adjustment difference of the back tie rod of the lock miter gate, the prestressed adjustment difference of the back tie rod of the lock miter gate and the pressure of the hydraulic system corresponding to each interval of the prestressed adjustment difference of the back tie rod of the lock miter gate are compared to obtain the pressure of the hydraulic system of the lock miter gate, and the prestressed adjustment value of the back tie rod of the lock miter gate is adjusted according to the pressure of the hydraulic system of the lock miter gate.

9. The power monitoring and control system for the operation of a ship lock miter gate according to claim 7, characterized in that: The specific analysis conditions for the prestress evaluation value of the back tie rod of the ship lock miter gate are: Wherein, K represents the prestressed value of the back tie rod of the lock miter gate, H represents the stiffness evaluation value of the lock miter gate, R represents the dynamic stress safety evaluation value of the lock miter gate, Y represents the wind pressure in the operation area of ​​the lock miter gate, G represents the water pressure in the operation area of ​​the lock miter gate, ΔY represents the correction factor corresponding to the set wind pressure, ΔG represents the correction factor corresponding to the set water pressure, β1 represents the weight factor corresponding to the set stiffness evaluation value of the lock miter gate, β2 represents the weight factor corresponding to the set dynamic stress safety evaluation value of the lock miter gate, β3 represents the weight factor corresponding to the set wind pressure, and β4 represents the weight factor corresponding to the set water pressure.

10. The method for the power monitoring and control system for the operation of the ship lock miter gate as claimed in any one of claims 1 to 9, characterized in that: include: Monitor the vibration state of each structural component during the operation of the lock miter gate, obtain the stiffness evaluation value of the lock miter gate, and control the electric control signal of the proportional pump according to the stiffness evaluation value of the lock miter gate; Monitor the dynamic stress of each structural component during the operation of the ship lock miter gate, obtain the dynamic stress safety assessment value of the ship lock miter gate, and adjust the output frequency of the motor through the frequency converter according to the dynamic stress safety assessment value of the ship lock miter gate; According to the stiffness evaluation value of the lock miter gate and the dynamic stress safety evaluation value of the lock miter gate, and combined with the characteristic data during the operation of the lock miter gate, the prestress adjustment value of the back tie rod of the lock miter gate is obtained, and the prestress of the back tie rod of the lock miter gate is adjusted according to the prestress adjustment value of the back tie rod of the lock miter gate.

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