Automatic control method for ship lock miter gate based on water flow pulsating pressure

Abstract

The present application relates to the technical field of ship lock automatic control, in particular to a ship lock miter gate automatic control method based on water flow pulsating pressure, which comprises the following steps: judging the current working condition of the ship lock miter gate, obtaining the initial control strategy of the current working condition of the ship lock miter gate; obtaining the abnormal state evaluation value of the ship lock miter gate control equipment through processing; obtaining the comprehensive performance evaluation index of the ship lock miter gate through comprehensive analysis; matching the comprehensive performance evaluation index of the ship lock miter gate to obtain the ship lock bearing pressure evaluation threshold, and feeding back and warning the comprehensive performance of the ship lock miter gate; analyzing to obtain the ship lock bearing pressure evaluation value, comparing the ship lock bearing pressure evaluation value with the ship lock bearing pressure evaluation threshold, and adjusting the initial control strategy of the current working condition according to the comparison result. The ship lock miter gate automatic control method based on water flow pulsating pressure can ensure the safe passage of ships, thereby helping to improve the operation quality and safety of the ship lock.

Description

Technical Field

[0001] This invention relates to the field of automatic lock control technology, specifically to an automatic control method for miter gates in locks based on water flow pulsation pressure. Background Technology

[0002] As vital waterway infrastructure, the operational efficiency and safety of ship locks are crucial to the development of the shipping industry. During lock operation, the miter gate, a key component, needs to be frequently opened and closed to regulate the water level within the lock chamber, allowing vessels to pass smoothly. However, due to the presence of pulsating water pressure, the operational stability and safety of the miter gate face significant challenges.

[0003] For example, the invention patent with announcement number CN117071521B is a smart loading test system and method for a miter gate structure of a ship lock. It includes a gate, a self-reactive frame for fixing the gate, a rotation actuator that causes the gate body to rotate around a set angular velocity, a loading actuator that can realize static and dynamic combined loading on the gate, a dual-channel control system that can achieve coordinated loading through electro-hydraulic servo closed-loop control of the rotation and loading channels, and a dynamic signal testing and analysis system with multi-channel synchronous sampling that can realize distributed acquisition and monitoring of the test system. By simulating the entire operation process of the miter gate structure, the dynamic response of the gate and its supporting moving parts under ship impact force, hydrostatic pressure, water flow pulsation pressure, and frequent opening and closing can be studied. By collecting the dynamic response signals of the sensitive area of ​​the gate model under load, the stress and deformation characteristics of the gate and its supporting moving parts (top and bottom pivots) during the filling and emptying of the ship lock and the opening and closing of the gate can be studied.

[0004] For example, the invention patent with publication number CN118223460A is a lock gate system, which includes a lock chamber, a gate, a connecting pivot, and a working bridge. The lock chamber includes a lock bottom plate and a lock wall. The first end of the connecting pivot is located on the lock wall, and the second end of the connecting pivot is hinged to the gate. The working bridge is fixedly located on the top of the gate. The lock wall includes a concrete wall, a bolster, and a maintenance cover. The bolster is anchored to the inner wall of the concrete wall. The top of the concrete wall has a working chamber with an opening on the top surface. The maintenance cover is located on the concrete wall to cover the opening on the top surface. The first end of the connecting pivot is located in the working chamber, and the second end of the connecting pivot extends laterally to the top of the bolster and is hinged to the gate. The bridge deck of the working bridge, the top surface of the concrete wall, and the top surface of the maintenance cover are arranged flush.

[0005] However, in the process of implementing the technical solution of the present invention in the embodiments of this application, it was found that the above-mentioned technology has at least the following technical problems: the existing automatic control system often relies only on a simple threshold triggering mechanism and the adjustment dimension is relatively simple, which leads to poor control effect in some complex environments. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automatic control method for miter gates in ship locks based on water flow pulsation pressure, which can effectively solve the problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention provides an automatic control method for a miter gate of a lock based on water flow pulsation pressure, comprising: acquiring real-time working data of the miter gate, determining the current working condition of the miter gate, collecting lock scale data, and acquiring an initial control strategy for the current working condition of the miter gate based on the lock scale data and the real-time working data of the miter gate.

[0008] The status data of the miter gate control equipment of the lock is obtained, processed to obtain the abnormal status assessment value of the miter gate control equipment, and the data of the miter gate control components are collected. The comprehensive performance evaluation index of the miter gate is obtained through comprehensive analysis.

[0009] The pressure assessment threshold of the lock is obtained by matching the comprehensive performance evaluation index of the miter gate of the lock, and feedback and early warning are given on the comprehensive performance of the miter gate of the lock.

[0010] The working environment data of the miter gate of the lock is obtained and analyzed to obtain the pressure assessment value of the lock. The pressure assessment value of the lock is compared with the pressure assessment threshold of the lock to obtain the comparison result. The initial control strategy for the current working condition is adjusted according to the comparison result.

[0011] As a further method, the specific process of determining the current working condition of the miter gate of the lock is as follows: the real-time working data of the miter gate of the lock includes the pressure inside and outside the gate and the displacement of passing ships.

[0012] The pressure difference is calculated based on the pressure inside and outside the gate, and the pressure difference range is extracted from the automatic control system.

[0013] If the pressure difference between the inside and outside of the gate is within the pressure difference range, it indicates that the miter gate is in the open state.

[0014] If the pressure difference between the inside and outside of the gate is not within the pressure difference range, it indicates that the miter gate is closed.

[0015] As a further method, the initial control strategy for obtaining the current operating condition of the miter gate of the lock is specifically as follows: based on the displacement of the passing ships, the expected opening angle of the miter gate of the lock is matched.

[0016] Obtain lock scale data, which includes: effective dimensions of the lock chamber, number and size of spillway openings.

[0017] Based on the expected opening angle of the miter gate and the scale data of the lock, and by extracting the maximum effective dimensions of the lock chamber, the maximum number and maximum size of the spillway openings from the automatic control system, the expected opening time of the miter gate is obtained through comprehensive analysis.

[0018] The expected opening angle and expected opening time of the miter gate in the lock are marked as the initial control strategy for the current operating condition.

[0019] As a further method, the abnormal status assessment value of the lock miter gate control equipment is obtained through processing. The specific process is as follows: the status data of the lock miter gate control equipment includes the voltage, current, power, temperature and vibration intensity of the control equipment at each time point within a preset monitoring period.

[0020] The control equipment specifically refers to electrical equipment.

[0021] Rated voltage, rated current, rated power, rated temperature, rated vibration intensity, allowable deviation voltage, allowable deviation current, allowable deviation power, allowable deviation temperature, and allowable deviation vibration intensity are extracted from the automatic control system database. Based on the status data of the miter gate control equipment, the abnormal status assessment value of the miter gate control equipment is obtained through comprehensive analysis. The abnormal status assessment value of the miter gate control equipment is used to quantitatively assess the degree of abnormality in the status of the miter gate control equipment, providing a basis for evaluating the comprehensive performance of the miter gate.

[0022] As a further method, the data of the lock miter gate control components includes the prestress of the top drive A rod, the prestress of the top drive B rod, the prestress of the opening and closing rod, and the prestress of the back tie rod, as well as the stress of the top drive A rod, the stress of the top drive B rod, the stress of the opening and closing rod, and the stress of the back tie rod at each time point in the preset monitoring cycle.

[0023] As a further method, the comprehensive analysis yields the comprehensive performance evaluation index of the miter gate of the lock. The specific analysis process is as follows: the allowable deviation stress of the top drive rod, the allowable deviation stress of the opening and closing rod, and the allowable deviation stress of the back tie rod are extracted from the automatic control system database. Based on the data of the miter gate control components, the safety evaluation index of the control components is obtained through comprehensive analysis. The safety evaluation index of the control components is used to quantitatively evaluate the safety level of the miter gate control components and provide a basis for evaluating the comprehensive performance of the miter gate.

[0024] Based on the abnormal status assessment value of the miter gate control equipment and the safety assessment index of the control components, a comprehensive performance assessment index for the miter gate is obtained through comprehensive analysis. This comprehensive performance assessment index is used to quantitatively evaluate the comprehensive performance of the miter gate and provides a basis for feedback and early warning of the comprehensive performance of the miter gate.

[0025] As a further method, the feedback and early warning of the comprehensive performance of the miter gate of the lock is specifically carried out as follows: the comprehensive performance evaluation index of the miter gate is compared with the preset threshold of the comprehensive performance evaluation index of the miter gate in the database of the automatic control system. If the comprehensive performance evaluation index of the miter gate is higher than or equal to the threshold of the comprehensive performance evaluation index of the miter gate, it indicates that the performance evaluation of the miter gate is qualified, and the result is displayed and output. If the comprehensive performance evaluation index of the miter gate is lower than the threshold of the comprehensive performance evaluation index of the miter gate, it indicates that the performance evaluation of the miter gate is unqualified, and a risk warning is issued for the miter gate.

[0026] As a further method, the analysis of the working environment data of the miter gate of the lock to obtain the pressure assessment value of the lock is carried out. The specific process is as follows: the working environment data of the miter gate of the lock includes the water flow velocity and water flow pulsation pressure at each environmental monitoring point in a preset monitoring period, as well as the upstream and downstream water levels in the preset monitoring period.

[0027] The allowable deviation water level, critical value of water flow velocity, and critical value of water flow pulsation pressure are extracted from the automatic control system database. Based on the working environment data of the miter gate of the lock, the pressure assessment value of the lock is obtained through comprehensive analysis. The pressure assessment value of the lock is used to quantitatively assess the degree of external pressure that the lock can withstand, and provides a basis for adjusting the initial control strategy of the miter gate under the current working condition.

[0028] As a further method, the pressure assessment value of the lock is compared with the pressure assessment threshold of the lock to obtain the comparison result. The specific comparison process is as follows: the pressure assessment value of the lock is compared with the pressure assessment threshold of the lock. If the pressure assessment value of the lock is lower than or equal to the pressure assessment threshold of the lock, it indicates that the lock is in normal operation under the current working condition and there is no need to adjust the initial control strategy of the current working condition. If the pressure assessment value of the lock is higher than the pressure assessment threshold of the lock, it indicates that the lock is in abnormal operation under the current working condition and the initial control strategy of the current working condition needs to be adjusted.

[0029] As a further method, the initial control strategy for the current working condition is adjusted according to the comparison results. The specific adjustment process is as follows: if the pressure assessment value of the lock is higher than the pressure assessment threshold of the lock, the difference between the pressure assessment value of the lock and the pressure assessment threshold of the lock is calculated. Based on the difference between the pressure assessment value of the lock and the pressure assessment threshold of the lock, the adjustment value of the expected opening time of the miter gate of the lock under the current working condition is matched.

[0030] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0031] (1) This invention provides an automatic control method for the miter gate of a lock based on the pressure of water flow pulsation. It compares the predicted pressure and the actual pressure of the miter gate of the lock, and adjusts the initial control strategy for the current working condition according to the comparison results. This can ensure the safe passage of ships, optimize the operation efficiency of the lock, and improve the level of intelligent management. This will help improve the operation quality and safety of the lock and meet the passage needs of more ships.

[0032] (2) By comprehensively analyzing parameters such as voltage, current, power, temperature and vibration intensity, this invention can gain a more comprehensive understanding of the equipment's operating status, improve the accuracy of fault diagnosis, help to promptly detect abnormalities in the equipment, take preventive measures, avoid equipment failures, and thus improve the equipment's energy efficiency and operating efficiency.

[0033] (3) By comprehensively comparing the difference between the prestress and the actual stress of each prestressed member, this invention can provide a more comprehensive understanding of the stress state of the miter gate in actual operation, help to further optimize the prestress design, reduce operational failures and safety hazards caused by structural deformation, vibration and other problems, improve the overall stability of the structure, and thus ensure that the miter gate maintains a stable and smooth operation during opening and closing. Attached Figure Description

[0034] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the method flow of the present invention.

[0036] Figure 2 This is a schematic diagram illustrating the functional relationship between the abnormal state evaluation value of the lock miter gate control equipment and the comprehensive performance evaluation index of the lock miter gate in an embodiment of the present invention. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Reference Figure 1As shown, the present invention provides an automatic control method for a miter gate of a lock based on water flow pulsation pressure, including: acquiring real-time working data of the miter gate, determining the current working condition of the miter gate, collecting lock scale data, and acquiring an initial control strategy for the current working condition of the miter gate based on the lock scale data and the real-time working data of the miter gate.

[0039] Specifically, the current working condition of the miter gate of the lock is determined by the following process: the real-time working data of the miter gate includes the pressure inside and outside the gate and the displacement of passing ships.

[0040] The pressure difference is calculated based on the pressure inside and outside the gate, and the pressure difference range is extracted from the automatic control system.

[0041] If the pressure difference between the inside and outside of the gate is within the pressure difference range, it indicates that the miter gate is in the open state.

[0042] If the pressure difference between the inside and outside of the gate is not within the pressure difference range, it indicates that the miter gate is closed.

[0043] It should be explained that the determination of the current working condition of the miter gate in this embodiment is based on the fact that the miter gate can operate, without considering the possibility of damage to the miter gate.

[0044] Furthermore, the initial control strategy for the current operating condition of the miter gate of the lock is obtained. The specific process is as follows: based on the displacement of the passing ships, the expected opening angle of the miter gate of the lock is matched.

[0045] It should be explained that the specific matching process is as follows: the mapping set between the ship's displacement and the expected opening angle of the lock's miter gate is extracted from the automatic control system, and the expected opening angle of the lock's miter gate is obtained by matching the mapping set.

[0046] It should be explained that the opening angle of the miter gate in a lock refers to the angle by which the two gate leaves rotate relative to the vertical position (i.e., the fully closed state) during the opening process.

[0047] It's important to explain that the opening angle of the miter gates in a lock needs to be large enough to ensure the smooth passage of vessels of different sizes. If the opening angle is too small, it may restrict the passage of vessels, preventing them from entering or exiting the lock. The opening angle of the miter gates also affects the efficiency of vessel passage. If the opening angle is too large, although it can accommodate larger vessels, it may increase the lock's opening and closing time and energy consumption. Conversely, if the opening angle is too small, although the opening and closing time and energy consumption may be reduced, it may limit the speed of vessels passing through, reducing the efficiency of passage. Therefore, it is necessary to reasonably balance the relationship between the opening angle and the efficiency of passage while meeting the needs of vessel passage.

[0048] Obtain lock scale data, which includes: effective dimensions of the lock chamber, number and size of spillway openings.

[0049] Based on the expected opening angle of the miter gate and the scale data of the lock, and by extracting the maximum effective dimensions of the lock chamber, the maximum number and maximum size of the spillway openings from the automatic control system, a comprehensive analysis is conducted to obtain the estimated opening time of the miter gate. The estimated opening time is then matched with the estimated opening time of the miter gate.

[0050] In one specific embodiment, the numerical expression for the estimated opening time of the lock miter gate is:

[0051] ;

[0052] In the formula, This indicates the estimated opening time of the miter gates in the lock. Indicates the expected opening angle of the miter gate of the lock. Indicates the effective dimensions of the gate chamber. Indicates the number of drainage holes. Indicates the size of the drain hole. Indicates the maximum effective dimensions of the gate chamber. Indicates the maximum number of drainage outlets. Indicates the maximum size of the drain hole. This represents the influencing factor of the expected opening time of the miter gate corresponding to the preset expected opening angle of the miter gate. This represents the influencing factor of the estimated opening time of the miter gate of the lock corresponding to the preset effective dimensions of the lock chamber. This indicates the influencing factor of the estimated opening time of the miter gate in the lock corresponding to the preset number of spillway openings. This indicates the influencing factor of the estimated opening time of the miter gate in the lock corresponding to the preset sluice gate size.

[0053] It should be explained that when the expected opening angle of the miter gate and the effective dimensions of the lock chamber are larger, and the number and size of the spillway openings are smaller, the corresponding estimated opening time of the miter gate will be larger, indicating that the expected opening time of the miter gate will be longer.

[0054] It's important to explain that the larger the opening angle of the miter gate in a lock, the longer the opening time, because more force is needed to overcome water pressure and friction. A larger effective lock chamber requires a longer opening time to ensure the water level is adjusted to the appropriate height for safe vessel passage. A greater number and larger size of spillway orifices can accelerate the discharge rate, thus shortening the opening time. Simultaneously, a sufficiently large number and size of spillway orifices can adjust the water level more quickly; the miter gate may not need to be fully open to reach the target water level. The effective size of the lock chamber determines the amount of water that needs to be regulated. Larger lock chambers require more spillway orifices and larger spillway orifice sizes to effectively regulate the water level.

[0055] It should be explained that in this embodiment... This represents the influencing factor of the expected opening time of the miter gate corresponding to the preset expected opening angle of the miter gate. This represents the influencing factor of the estimated opening time of the miter gate of the lock corresponding to the preset effective dimensions of the lock chamber. This indicates the influencing factor of the estimated opening time of the miter gate in the lock corresponding to the preset number of spillway openings. This indicates the influence factors on the estimated opening time of the miter gate corresponding to the preset spillway orifice size. These factors represent the numerical values ​​indicating the degree of influence of the estimated opening angle of the miter gate, the effective dimensions of the lock chamber, the number of spillway orifices, and the unit value of the spillway orifice size on the estimated opening time of the miter gate. In use, these factors can be directly obtained from the automatic control system database. The correspondence can be a pre-defined mapping relationship, for example, the estimated opening angle of the miter gate, the effective dimensions of the lock chamber, the number of spillway orifices, and the unit value of the spillway orifice size. The number and size of the spillway orifices are mapped to preset in the automatic control system database, forming a mapping set with the expected opening angle of the miter gate, the effective dimensions of the lock chamber, and the expected opening time influencing factors corresponding to the number and size of the spillway orifices. Real-time data on the expected opening angle, effective dimensions of the lock chamber, number and size of the spillway orifices are input into the mapping set to obtain the expected opening time influencing factors for the miter gates: the expected opening angle corresponds to the expected opening angle, the effective dimensions of the lock chamber corresponds to the expected opening time of the miter gate, the number of spillway orifices corresponds to the expected opening time of the miter gate, and the size of the spillway orifice corresponds to the expected opening time of the miter gate. The mapping relationship can be one-to-one or many-to-one. All of these influencing factors are extracted from the automatic control system database and their values ​​range from 0 to 1.

[0056] Furthermore, the estimated opening time assessment value of the miter gate and the mapping set of the estimated opening time of the miter gate corresponding to the assessment value range are extracted from the automatic control system database. The real-time estimated opening time assessment value of the miter gate is obtained, and the corresponding estimated opening time of the miter gate is obtained according to the mapping set.

[0057] The expected opening angle and expected opening time of the miter gate in the lock are marked as the initial control strategy for the current operating condition.

[0058] It should be explained that the opening time refers to the time required from the start of the miter gate to its full opening. The effective dimensions of the lock chamber include the length, width, and sill depth (or sill depth), which determine the size of the vessels that the lock can accommodate. For example, the effective dimensions of a lock chamber might be length × width × sill depth = 180m × 23m × 3.5m.

[0059] It's important to explain that in the planning, construction, and actual operation of ship locks, the opening time of the miter gates not only affects the smooth passage of ships but also directly impacts the lock's throughput and capacity. Precisely controlling the opening time of the miter gates ensures that ships enter the lock chamber at the optimal moment, thereby maximizing the lock's throughput efficiency. Furthermore, a reasonable opening time can effectively reduce the impact of water flow pulsation pressure on the miter gates and the overall lock structure, extending the equipment's lifespan and improving operational safety. Therefore, controlling the gate opening duration is the optimal choice for achieving efficient and safe operation of the ship lock.

[0060] The status data of the miter gate control equipment of the lock is obtained, processed to obtain the abnormal status assessment value of the miter gate control equipment, and the data of the miter gate control components are collected. The comprehensive performance evaluation index of the miter gate is obtained through comprehensive analysis.

[0061] Specifically, the process of obtaining the abnormal status assessment value of the lock miter gate control equipment is as follows: the status data of the lock miter gate control equipment includes the voltage, current, power, temperature and vibration intensity of the control equipment at each time point within a preset monitoring period.

[0062] The control equipment specifically refers to electrical equipment.

[0063] It should be explained that voltage and current sensors can be installed at the power input terminals and key circuit nodes of the lock miter gate control equipment to monitor voltage and current changes in real time. Simultaneously, power data can be obtained by using power sensors or by calculating the product of voltage and current. Temperature sensors can be installed at critical parts of the lock miter gate control equipment to monitor temperature changes in real time. Vibration acceleration sensors can be installed at vibration-sensitive parts of the lock miter gate control equipment to monitor vibration intensity in real time.

[0064] Rated voltage, rated current, rated power, rated temperature, rated vibration intensity, allowable deviation voltage, allowable deviation current, allowable deviation power, allowable deviation temperature, and allowable deviation vibration intensity are extracted from the automatic control system database. Based on the status data of the miter gate control equipment, the abnormal status assessment value of the miter gate control equipment is obtained through comprehensive analysis. The abnormal status assessment value of the miter gate control equipment is used to quantitatively assess the degree of abnormality in the status of the miter gate control equipment, providing a basis for evaluating the comprehensive performance of the miter gate.

[0065] In one specific embodiment, the numerical expression for the abnormal state assessment value of the lock miter gate control device is:

[0066]

[0067] In the formula, This represents the abnormal status assessment value of the miter gate control equipment in the lock, where t represents the time point number. d represents the total number of time points. This represents the voltage of the control device at time t. This represents the current of the control device at time t. This represents the power of the control device at time t. This represents the temperature of the control device at time point t. This represents the vibration intensity of the control equipment at time point t. Indicates the rated voltage. Indicates the rated current. Indicates the rated power. Indicates the rated temperature. Indicates the rated vibration intensity. Indicates the allowable deviation voltage. Indicates the allowable deviation current. Indicates the allowable deviation power. Indicates the allowable deviation temperature. Indicates the permissible deviation vibration intensity. This indicates the abnormal status impact factor of the control equipment corresponding to the preset voltage. This represents the abnormal control device status impact factor corresponding to the preset current. This represents the abnormal status impact factor of the control equipment corresponding to the preset power. This indicates the influence factor of abnormal control equipment status corresponding to the preset temperature. This represents the abnormal status impact factor of the control equipment corresponding to the preset vibration intensity.

[0068] It should be explained that the greater the absolute difference between the current, voltage, power, temperature, and vibration intensity of the control equipment and the rated current, voltage, power, temperature, and vibration intensity, the greater the corresponding abnormal state assessment value of the lock miter gate control equipment, indicating a greater degree of abnormality in the state of the lock miter gate control equipment.

[0069] It should be explained that in this embodiment... This indicates the abnormal status impact factor of the control equipment corresponding to the preset voltage. This represents the abnormal control device status impact factor corresponding to the preset current. This represents the abnormal status impact factor of the control equipment corresponding to the preset power. This indicates the influence factor of abnormal control equipment status corresponding to the preset temperature. This represents the influence factors of the control equipment state anomaly corresponding to the preset vibration intensity. These factors represent the numerical values ​​of voltage, current, power, temperature, and vibration intensity on the degree of influence of each unit value on the control equipment state anomaly. In use, the influence factors of control equipment state anomaly corresponding to voltage, current, power, temperature, and vibration intensity can be directly obtained from the automatic control system database. The correspondence can be a pre-defined mapping relationship. For example, the voltage, current, power, temperature, and vibration intensity of each control device at each time point form a mapping set with the preset influence factors of control equipment state anomaly corresponding to voltage, current, power, temperature, and vibration intensity in the automatic control system database. Inputting the real-time voltage, current, power, temperature, and vibration intensity into the mapping set yields the influence factors of control equipment state anomaly corresponding to voltage, current, power, temperature, and vibration intensity. The mapping relationship can be one-to-one or many-to-one. The above-mentioned influencing factors were all extracted from the database of automatic control systems, and their values ​​range from 0 to 1.

[0070] It's important to explain that when the voltage deviates from the rated voltage, it can lead to abnormal equipment operation or damage. Voltage monitoring helps assess the power supply stability of equipment, providing crucial data for maintenance. An abnormally high current may indicate internal problems such as short circuits or overloads. Monitoring current allows for timely detection of these potential issues, preventing equipment shutdowns due to overheating or damage. Furthermore, current monitoring can assess equipment energy efficiency, providing data support for energy conservation and consumption reduction. Monitoring power allows understanding of equipment energy consumption, providing a basis for energy-efficient operation. Power monitoring also assesses the equipment's operating status; an abnormally low power output may indicate equipment malfunction or wear, requiring timely repair or replacement. Monitoring the temperature of critical components allows for timely detection of overheating, preventing damage from high temperatures. Additionally, temperature monitoring assesses the equipment's heat dissipation performance, providing optimization suggestions for its heat dissipation design. An abnormally high vibration may indicate imbalance, looseness, or wear. Monitoring vibration intensity allows for timely detection of these potential problems, preventing damage from excessive vibration.

[0071] It's important to explain that the phase difference between voltage and current determines the power factor, affecting the actual power transmission efficiency. In electromagnetic devices such as motors, instability in voltage and current during operation can lead to an imbalance in electromagnetic forces, causing vibration. Power consumption is usually accompanied by heat generation, a phenomenon known as the Joule heating effect. Therefore, higher power results in more heat generation and a higher temperature. Increased temperature can cause thermal expansion of device components, altering their relative positions and potentially increasing vibration. Temperature changes also affect the elastic modulus of materials, thus influencing vibration characteristics.

[0072] It's important to explain that comprehensively analyzing parameters such as voltage, current, power, temperature, and vibration intensity provides a more complete understanding of the equipment's operating status, improving the accuracy of fault diagnosis. Real-time monitoring of these parameters allows for the timely detection of equipment anomalies, enabling preventative measures to avoid equipment failures and subsequent downtime losses. Furthermore, monitoring data can be used to optimize and adjust equipment operation, improving energy efficiency and overall operational efficiency.

[0073] Furthermore, the data of the lock miter gate control components include the prestress of the top drive A rod, the prestress of the top drive B rod, the prestress of the opening and closing rod, and the prestress of the back tie rod, as well as the stress of the top drive A rod, the stress of the top drive B rod, the stress of the opening and closing rod, and the stress of the back tie rod at each time point in the preset monitoring cycle.

[0074] It should be explained that strain gauges can be attached to the top drive A rod, top drive B rod, opening and closing rod, and back tie rod of the miter gate control components. The resistance change of the strain gauges under stress can be recorded by a strain gauge or data acquisition system, and then the stress value can be calculated. The specific calculation formula is as follows: ,in, Indicates the elastic modulus of a material. Indicates stress, , Indicates strain, Kf represents the change in resistance of the strain gauge, that is, the difference between the resistance value R after being subjected to force and the initial resistance value R0. R0 represents the initial resistance value of the strain gauge, and Kf represents the sensitivity coefficient of the strain gauge, which is a constant describing the relationship between the change in resistance of the strain gauge and strain.

[0075] It's important to explain that actual stress refers to the true stress state generated within a member when it is under load. It reflects the member's strength and stability under external forces. Prestressing, on the other hand, is the compressive stress applied to a structure during construction to improve its service performance. During service, the prestressed compressive stress can completely or partially offset the tensile stress caused by the load, preventing structural failure.

[0076] Furthermore, a comprehensive analysis yielded the comprehensive performance evaluation index for the miter gate of the lock. The specific analysis process was as follows: the allowable deviation stress of the top drive rod, the allowable deviation stress of the opening and closing rod, and the allowable deviation stress of the back tie rod were extracted from the automatic control system database. Based on the data of the miter gate control components, a comprehensive analysis was conducted to obtain the safety evaluation index of the control components. The safety evaluation index of the control components is used to quantitatively evaluate the safety level of the miter gate control components and to provide a basis for evaluating the comprehensive performance of the miter gate.

[0077] In one specific embodiment, the numerical expression for the safety assessment index of the control component is:

[0078] ;

[0079] In the formula, This indicates the safety assessment index of the control components. This represents the stress in the top drive rod A at time point t. This represents the stress in the top drive B rod at time point t. This represents the stress on the opening / closing rod at time point t. This represents the stress in the back brace at time point t. Indicates the prestress of the top drive A rod. This indicates the prestress of the top drive B rod. Indicates the prestress of the opening and closing rod. Indicates the prestress of the tie rod. This represents the safety impact factor of the control component corresponding to the preset stress of the top drive A rod. This represents the safety impact factor of the control component corresponding to the preset stress of the top drive B-bar. This indicates the safety impact factor of the control component corresponding to the preset opening and closing rod stress. This indicates the safety impact factor of the control component corresponding to the preset back tie rod stress.

[0080] It should be explained that the smaller the actual stress of the top drive A rod, the actual stress of the top drive B rod, the actual stress of the opening and closing rod, and the actual stress of the back tie rod, the larger the corresponding safety assessment index of the control component, indicating that the safety level of the control component of the lock miter gate is higher.

[0081] It should be explained that in this embodiment... This represents the safety impact factor of the control component corresponding to the preset stress of the top drive A rod. This represents the safety impact factor of the control component corresponding to the preset stress of the top drive B-bar. This indicates the safety impact factor of the control component corresponding to the preset opening and closing rod stress. This represents the safety impact factor of the control component corresponding to the preset back tie rod stress. It indicates the numerical value of the influence of the unit variation of the top drive A rod stress, top drive B rod stress, opening / closing rod stress, and back tie rod stress on the safety of the control component. In use, the safety impact factors of the control component corresponding to the top drive A rod stress, top drive B rod stress, opening / closing rod stress, and back tie rod stress can be directly obtained from the automatic control system database. Their correspondence can be a pre-defined mapping relationship, for example, top drive A rod stress, top drive B rod stress, ... The stresses of the opening / closing lever and the back tie rod are mapped to the safety influence factors of the control components corresponding to the pre-set top drive A lever stress, top drive B lever stress, opening / closing lever stress, and back tie rod stress in the automatic control system database. The real-time stresses of the top drive A lever, top drive B lever, opening / closing lever stress, and back tie rod are input into the mapping sets to obtain the safety influence factors of the control components corresponding to the top drive A lever stress, top drive B lever stress, opening / closing lever stress, and back tie rod stress. The mapping relationship can be one-to-one or many-to-one. All of the above influence factors are extracted from the automatic control system database, and their values ​​range from 0 to 1.

[0082] It's important to explain that the top drive rods A and B work together to open and close the V-gate. Ideally, both should bear similar stresses, but in practice, this may differ due to structural asymmetry or operating conditions. The opening and closing rods typically participate directly in the opening and closing of the V-gate, while the back pull rod provides a counter-pull force to balance the weight of the gate and external water pressure. The opening and closing rods experience greater stress variations during operation, while the stress in the back pull rod remains relatively stable.

[0083] It should be explained that during the operation of the miter gate, the stress of all the rods usually changes synchronously. That is, the greater the stress of the top drive rod A, the greater the stress of the corresponding top drive rod B, opening and closing rod and back tie rod, but the magnitude and pattern of change may be different.

[0084] It's important to explain that prestressed design is used to counteract or balance various adverse loads that may occur during the operation of the lock's miter gate, such as its own weight, water level changes, and wind loads. By comprehensively comparing the prestress and actual stress of each prestressed member (top drive A rod, top drive B rod, opening and closing rod, and back tie rod), a more comprehensive understanding of the stress state of the lock's miter gate during actual operation can be obtained, and potential structural safety risks can be identified and detected in a timely manner. Based on the assessment results of prestress and actual stress, targeted maintenance plans can be developed, focusing on inspecting and repairing components with abnormal stress. This helps extend the service life of the lock's miter gate. Prestressed design can significantly improve the structural stiffness of the lock's miter gate, enabling it to better resist the effects of external loads. By comprehensively evaluating the difference between prestress and actual stress, the prestressed design can be further optimized, improving the overall stability of the structure. Simultaneously, accurate prestress assessment ensures that the lock's miter gate maintains a smooth and stable operation during opening and closing. This helps reduce operational failures and safety hazards caused by structural deformation, vibration, and other problems.

[0085] Based on the abnormal status assessment value of the miter gate control equipment and the safety assessment index of the control components, a comprehensive performance assessment index for the miter gate is obtained through comprehensive analysis. This comprehensive performance assessment index is used to quantitatively evaluate the comprehensive performance of the miter gate and provides a basis for feedback and early warning of the comprehensive performance of the miter gate.

[0086] In one specific embodiment, the numerical expression for the comprehensive performance evaluation index of the lock miter gate is:

[0087] ;

[0088] In the formula, This indicates the comprehensive performance evaluation index of the miter gate of the lock. This indicates the abnormal condition assessment value of the miter gate control equipment of the lock. This indicates the safety assessment index of the control components. This represents the comprehensive performance impact factor of the miter gate corresponding to the preset abnormal state assessment value of the miter gate control equipment in the lock. This represents the comprehensive performance impact factor of the herringbone door corresponding to the preset safety assessment index of the control components.

[0089] It should be explained that the smaller the abnormal state assessment value of the lock miter gate control equipment and the larger the safety assessment index of the control components, the larger the corresponding comprehensive performance assessment index of the lock miter gate, indicating that the comprehensive performance of the lock miter gate is better.

[0090] It should be explained that in this embodiment... This represents the comprehensive performance impact factor of the miter gate corresponding to the preset abnormal state assessment value of the miter gate control equipment in the lock. This represents the comprehensive performance impact factor of the miter gate corresponding to the preset control component safety assessment index. It also represents the numerical values ​​of the abnormal state assessment value of the miter gate control equipment and the unit value of the control component safety assessment index on the comprehensive performance of the miter gate. In use, the comprehensive performance impact factors of the miter gate corresponding to the abnormal state assessment value of the miter gate control equipment and the miter gate corresponding to the control component safety assessment index can be directly obtained from the automatic control system database. The correspondence can be a pre-defined mapping relationship. For example, the abnormal state assessment value of the miter gate control equipment and the control component safety assessment index can form a mapping set with the preset comprehensive performance impact factors of the miter gate corresponding to the abnormal state assessment value and the control component safety assessment index in the automatic control system database. Inputting the real-time abnormal state assessment value of the miter gate control equipment and the control component safety assessment index into the mapping set yields the comprehensive performance impact factors of the miter gate corresponding to the abnormal state assessment value and the control component safety assessment index. The mapping relationship can be one-to-one or many-to-one. The above-mentioned influencing factors were all extracted from the database of automatic control systems, and their values ​​range from 0 to 1.

[0091] It should be understood that, as Figure 2 As shown, curve a represents the relationship between the abnormal state assessment value of the control equipment of the miter gate and the comprehensive performance assessment index of the miter gate when the safety assessment index of the control component is 0.8; curve b represents the relationship between the abnormal state assessment value of the control equipment of the miter gate and the comprehensive performance assessment index of the miter gate when the safety assessment index of the control component is 1.0; and curve c represents the relationship between the abnormal state assessment value of the control equipment of the miter gate and the comprehensive performance assessment index of the miter gate when the safety assessment index of the control component is 1.2.

[0092] It should be explained that in this embodiment, the comprehensive performance impact factor of the miter gate corresponding to the abnormal state evaluation value of the miter gate control equipment is set to 0.5, and the comprehensive performance impact factor of the miter gate corresponding to the safety evaluation index of the control components is set to 0.3.

[0093] It's important to clarify that there's a close relationship between the abnormal state assessment value of the lock's miter gate control equipment and the safety assessment index of its control components. On one hand, abnormal states of the control equipment can directly affect the safety performance of the control components; for example, electrical problems such as voltage fluctuations and current overloads can lead to damage or failure of the control components. On the other hand, the safety performance of the control components also affects the overall operating status of the control equipment; for example, the strength of the push-pull rod directly impacts the stability and reliability of the control equipment. By comprehensively considering both the abnormal state assessment value of the control equipment and the safety assessment index of the control components, a more comprehensive understanding of the overall operating status and safety performance of the lock's miter gate can be achieved. This helps avoid the bias and misjudgment caused by evaluating a single parameter, improving the accuracy and reliability of the assessment. Furthermore, by promptly identifying and addressing abnormal states or safety hazards in the control equipment and components, the safety and stability of the lock's miter gate during operation can be ensured. This helps reduce the occurrence of safety accidents.

[0094] The pressure assessment threshold of the lock is obtained by matching the comprehensive performance evaluation index of the miter gate of the lock, and feedback and early warning are given on the comprehensive performance of the miter gate of the lock.

[0095] Specifically, the mapping set of the lock pressure assessment threshold corresponding to the comprehensive performance evaluation index range of the lock miter gate is extracted from the automatic control system database, the real-time comprehensive performance evaluation index of the lock miter gate is obtained, and the corresponding lock pressure assessment threshold is obtained according to the mapping set.

[0096] It should be explained that assessing the structural strength and stability of the miter gates in a lock can reveal the lock's limit state under pressure, thus helping to determine the lock's pressure-bearing threshold. The lock's pressure-bearing assessment threshold is a quantitative expression of the comprehensive performance evaluation results of the miter gates. By setting a reasonable threshold, the safety of the lock under normal operation and abnormal conditions can be ensured, while avoiding resource waste or safety hazards caused by over-design or under-design.

[0097] Furthermore, feedback and early warning are provided for the overall performance of the miter gate of the lock. The specific feedback process is as follows: the overall performance evaluation index of the miter gate is compared with the preset threshold of the overall performance evaluation index of the miter gate in the database of the automatic control system. If the overall performance evaluation index of the miter gate is higher than or equal to the threshold, it indicates that the performance evaluation of the miter gate is qualified, and the result is displayed and output. If the overall performance evaluation index of the miter gate is lower than the threshold, it indicates that the performance evaluation of the miter gate is unqualified, and a risk warning is issued for the miter gate.

[0098] The working environment data of the miter gate of the lock is obtained and analyzed to obtain the pressure assessment value of the lock. The pressure assessment value of the lock is compared with the pressure assessment threshold of the lock to obtain the comparison result. The initial control strategy for the current working condition is adjusted according to the comparison result.

[0099] Specifically, the working environment data of the miter gate of the lock is obtained and analyzed to obtain the pressure assessment value of the lock. The specific process is as follows: the working environment data of the miter gate of the lock includes the water flow velocity and water flow pulsation pressure at each environmental monitoring point in the preset monitoring period, as well as the upstream and downstream water levels in the preset monitoring period.

[0100] It should be explained that water level gauges (such as float-type water level gauges, pressure-type water level gauges, etc.) can be used to directly measure the water level upstream and downstream, flow meters (such as propeller-type flow meters, electromagnetic flow meters, etc.) can be used to directly measure the water flow velocity in the water flow, and pressure sensors can be installed at various environmental monitoring points to monitor the water flow pulsation pressure in real time.

[0101] The allowable deviation water level, critical value of water flow velocity, and critical value of water flow pulsation pressure are extracted from the automatic control system database. Based on the working environment data of the miter gate of the lock, the pressure assessment value of the lock is obtained through comprehensive analysis. The pressure assessment value of the lock is used to quantitatively assess the degree of external pressure that the lock can withstand, and provides a basis for adjusting the initial control strategy of the miter gate under the current working condition.

[0102] In one specific embodiment, the numerical expression for the pressure assessment value of the lock is:

[0103] ;

[0104] In the formula, This represents the assessed pressure value of the lock, where t represents the time variable. , Indicates the current time point, This indicates the start time of monitoring, and 'r' represents the number of each environmental monitoring station. q represents the total number of environmental monitoring stations. This represents the upstream water level at time t. This represents the downstream water level at time t. This represents the water flow velocity at time t at the r-th environmental monitoring point. This represents the water flow pulsation pressure at the i-th environmental monitoring point at time t. Indicates the allowable deviation water level. This represents the critical value of the water flow velocity. This represents the critical value of water flow pulsation pressure. This indicates the pressure influence factor of the lock corresponding to the preset water level difference. This indicates the pressure influence factor of the lock corresponding to the preset water flow velocity. This indicates the pressure influence factor of the lock corresponding to the preset water flow pulsation pressure.

[0105] It should be explained that the greater the difference in water level between upstream and downstream, the greater the water flow velocity, and the greater the water flow pulsation pressure, the greater the corresponding pressure assessment value of the lock, indicating that the lock is subjected to greater external pressure.

[0106] It should be explained that in this embodiment... This indicates the pressure influence factor of the lock corresponding to the preset water level difference. This indicates the pressure influence factor of the lock corresponding to the preset water flow velocity. This section describes the influence factors on the lock's pressure capacity corresponding to preset water flow pulsation pressure. These factors represent the degree of influence of unit variations in upstream and downstream water level difference, water flow velocity, and water flow pulsation pressure on the lock's pressure capacity. In use, these factors can be directly obtained from the automatic control system database. The correspondence can be a pre-defined mapping relationship. For example, the water flow velocity, water flow pulsation pressure, and upstream and downstream water levels at each environmental monitoring point are mapped to preset influence factors in the automatic control system database. Real-time water flow velocity, water flow pulsation pressure, and upstream and downstream water levels are then input into the mapping set to obtain the influence factors on the lock's pressure capacity corresponding to water level difference, water flow velocity, and water flow pulsation pressure. The mapping relationship can be one-to-one or many-to-one. All of these influence factors are extracted from the automatic control system database and their values ​​range from 0 to 1.

[0107] It's important to explain that the upstream and downstream water level difference refers to the height difference between the water levels upstream and downstream of the lock, which directly determines the potential energy difference when water flows through the lock. During lock operation, the greater the upstream and downstream water level difference, the greater the potential energy of the water flowing through the lock, thus driving the water to flow at a higher speed. As the water flow velocity increases, irregular movements such as turbulence and vortices in the water flow also intensify, leading to an increase in the pulsating pressure of the water flow. This pulsating pressure is a random load that dynamically impacts the lock structure, affecting its stability and safety. Comprehensively considering parameters such as the upstream and downstream water level difference, water flow velocity, and pulsating pressure allows for a more complete understanding of the stress conditions experienced by the lock during operation. This helps improve the accuracy and reliability of the assessment. Furthermore, analyzing the relationships between these parameters can provide optimization suggestions for the lock's structural design. For example, when the upstream and downstream water level difference is large, it is necessary to increase the strength and stability of the lock structure to withstand the impact of the pulsating pressure.

[0108] Furthermore, the pressure assessment value of the lock is compared with the pressure assessment threshold of the lock to obtain the comparison result. The specific comparison process is as follows: the pressure assessment value of the lock is compared with the pressure assessment threshold of the lock. If the pressure assessment value of the lock is lower than or equal to the pressure assessment threshold of the lock, it indicates that the lock is in normal operation under the current working condition and there is no need to adjust the initial control strategy of the current working condition. If the pressure assessment value of the lock is higher than the pressure assessment threshold of the lock, it indicates that the lock is in abnormal operation under the current working condition and the initial control strategy of the current working condition needs to be adjusted.

[0109] It should be explained that by adjusting the initial control strategy of the lock under the current operating conditions as described above, the safe passage of ships can be ensured, the operating efficiency of the lock can be optimized, and the level of intelligent management can be improved. This will help improve the operating quality and safety of the lock, meet the passage needs of more ships, reduce energy consumption and emissions, and promote sustainable development.

[0110] Furthermore, the initial control strategy for the current operating condition is adjusted based on the comparison results. The specific adjustment process is as follows: if the pressure assessment value of the lock is higher than the pressure assessment threshold of the lock, the difference between the pressure assessment value and the pressure assessment threshold of the lock is calculated. Based on the difference between the pressure assessment value and the pressure assessment threshold of the lock, the adjustment value of the expected opening time of the miter gate of the lock under the current operating condition is obtained.

[0111] It should be explained that the final opening time of the miter gate under the current working conditions is obtained by summing the expected opening time and the adjustment value of the expected opening time.

[0112] It should be explained that the specific steps of the automatic control method provided by this invention are as follows: First, by monitoring the operating data of the miter gate of the lock in real time, including the pressure inside and outside the gate and the displacement of passing ships, the current opening status of the miter gate is determined. Next, based on the collected lock scale data and real-time operating data, the initial control strategy for the current operating condition of the miter gate is obtained. Then, using the comprehensive performance evaluation method provided by this invention, the comprehensive performance of the miter gate is evaluated, and a lock pressure assessment threshold is obtained. By comparing the lock pressure assessment value with the assessment threshold, it can be determined whether the lock is in normal operation under the current operating condition. If the lock pressure assessment value is higher than the assessment threshold, it indicates that the lock is in abnormal operation under the current operating condition, and the initial control strategy needs to be adjusted. The specific adjustment process is as follows: based on the difference between the lock pressure assessment value and the assessment threshold, the adjustment value of the expected opening time of the miter gate under the current operating condition is obtained. By adjusting the opening time of the miter gate, the pressure on the lock is kept within a safe range, thereby ensuring the safe passage of ships and the efficient operation of the lock. Furthermore, this invention also provides a feedback and early warning mechanism for the overall performance of the miter gate of the lock. When the overall performance evaluation index of the miter gate of the lock is lower than a preset threshold, the system will automatically issue an early warning signal, prompting management personnel to take timely measures for maintenance or repair to avoid potential safety hazards.

[0113] It should be explained that by implementing the above control methods, not only can the accuracy and timeliness of the control strategy be ensured, but also the smooth passage of ships can be guaranteed, while optimizing operational efficiency. Furthermore, it allows for a comprehensive understanding of equipment operating status and structural safety, enabling the timely detection of potential risks.

[0114] It should be explained that the above control method effectively solves the shortcomings of existing automatic control methods for ship locks through real-time monitoring, comprehensive evaluation and dynamic adjustment, improves the intelligence level of ship lock operation, ensures safe passage of ships, and enhances the quality and safety of ship lock operation.

[0115] In one specific embodiment, the automatic control system database is used to store relevant data during the process of determining whether the initial control strategy of the miter gate under the current operating condition of the lock needs to be adjusted. This includes rated voltage, rated current, rated power, critical temperature, critical vibration intensity, allowable deviation voltage, allowable deviation current and allowable deviation power, safety influence factors of control components corresponding to the stress of the top drive A rod, safety influence factors of control components corresponding to the stress of the top drive B rod, safety influence factors of control components corresponding to the stress of the opening and closing rod, and safety influence factors of control components corresponding to the stress of the back tie rod, as well as data extracted from the automatic control system database in the above embodiments. The relevant data can be directly measured by sensors, or various real-time data of the miter gate of the lock can be automatically collected by the local control unit, or relevant hydrological data can be obtained in real time through the global geographic information system.

[0116] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A method for automatically controlling a miter gate of a ship lock based on fluctuating pressure of water flow, characterized in that, The method comprises the following steps: acquiring real-time working data of a ship lock miter gate, judging a current working condition of the ship lock miter gate, collecting ship lock scale data, and acquiring an initial control strategy of the current working condition of the ship lock miter gate according to the ship lock scale data and the real-time working data of the ship lock miter gate; acquiring control equipment state data of the ship lock miter gate, obtaining an abnormal state evaluation value of the control equipment of the ship lock miter gate through processing, collecting control component data of the ship lock miter gate, and comprehensively analyzing to obtain a comprehensive performance evaluation index of the ship lock miter gate; matching the comprehensive performance evaluation index of the ship lock miter gate to obtain a ship lock pressure bearing evaluation threshold, and feeding back and warning the comprehensive performance of the ship lock miter gate; acquiring and analyzing ship lock miter gate working environment data to obtain a ship lock pressure bearing evaluation value, comparing the ship lock pressure bearing evaluation value with the ship lock pressure bearing evaluation threshold, acquiring a comparison result, and adjusting the initial control strategy of the current working condition according to the comparison result; the process of obtaining the abnormal state evaluation value of the control equipment of the ship lock miter gate through processing is as follows: the control equipment state data of the ship lock miter gate includes voltage, current, power, temperature and vibration intensity of the control equipment at each time point in a preset monitoring period; the control equipment specifically refers to electrical equipment; the rated voltage, rated current, rated power, rated temperature, rated vibration intensity, allowable deviation voltage, allowable deviation current, allowable deviation power, allowable deviation temperature and allowable deviation vibration intensity are extracted from an automatic control system database, and the abnormal state evaluation value of the control equipment of the ship lock miter gate is comprehensively analyzed according to the control equipment state data of the ship lock miter gate, which is used to quantitatively evaluate the abnormality of the control equipment state of the ship lock miter gate and provides a basis for evaluating the comprehensive performance of the miter gate.

2. The method according to claim 1, characterized in that: the process of judging the current working condition of the ship lock miter gate is as follows: the real-time working data of the ship lock miter gate includes the pressure inside and outside the gate and the displacement of a passing ship; the pressure difference is calculated according to the pressure inside and outside the gate, and the pressure difference value interval is extracted from the automatic control system; if the pressure difference between the inside and outside of the gate is within the pressure difference value interval, it indicates that the miter gate is in an open state; if the pressure difference between the inside and outside of the gate is not within the pressure difference value interval, it indicates that the miter gate is in a closed state.

3. The method according to claim 2, wherein the method is characterized by: the process of acquiring the initial control strategy of the current working condition of the ship lock miter gate is as follows: the expected opening angle of the ship lock miter gate is matched according to the displacement of the passing ship; the ship lock scale data is acquired, which includes the effective scale of the lock chamber, the number and size of the drain hole; the expected opening time of the ship lock miter gate is comprehensively analyzed according to the expected opening angle of the ship lock miter gate and the ship lock scale data, and the maximum effective scale of the lock chamber, the maximum number and size of the drain hole are extracted from the automatic control system; the expected opening angle of the ship lock miter gate and the expected opening time of the ship lock miter gate are marked as the initial control strategy of the current working condition.

4. The method for automatic control of the ship lock miter gate based on water flow pulsating pressure according to claim 1, characterized in that: The ship lock miter gate control component data includes top drive A rod prestress, top drive B rod prestress, opening and closing rod prestress, back pull rod prestress, top drive A rod stress, top drive B rod stress, opening and closing rod stress and back pull rod stress at each time point in a preset monitoring period.

5. The method according to claim 4, wherein the method is characterized by: The comprehensive analysis obtains a ship lock miter gate comprehensive performance evaluation index, and the specific analysis process is: The top drive rod allowable deviation stress, the opening and closing rod allowable deviation stress and the back pull rod allowable deviation stress are extracted from the automatic control system database, and the control component safety evaluation index is obtained through comprehensive analysis according to the ship lock miter gate control component data, the control component safety evaluation index is used for quantitatively evaluating the safety degree of the miter gate control component, and provides a basis for evaluating the comprehensive performance of the miter gate; The ship lock miter gate comprehensive performance evaluation index is obtained through comprehensive analysis according to the ship lock miter gate control equipment abnormal state evaluation value and the control component safety evaluation index, the ship lock miter gate comprehensive performance evaluation index is used for quantitatively evaluating the comprehensive performance of the ship lock miter gate, and provides a basis for feedback warning of the comprehensive performance of the ship lock miter gate.

6. The method according to claim 5, wherein the method is characterized by: The specific feedback process is: The ship lock miter gate comprehensive performance evaluation index is compared with the preset ship lock miter gate comprehensive performance evaluation index threshold in the automatic control system database, if the ship lock miter gate comprehensive performance evaluation index is higher than or equal to the ship lock miter gate comprehensive performance evaluation index threshold, it indicates that the performance evaluation of the ship lock miter gate is qualified, then the result is displayed and output, if the ship lock miter gate comprehensive performance evaluation index is lower than the ship lock miter gate comprehensive performance evaluation index threshold, it indicates that the performance evaluation of the ship lock miter gate is unqualified, then the risk warning of the ship lock miter gate is performed.

7. The method for automatic control of the ship lock miter gate based on water flow pulsating pressure according to claim 1, characterized in that: The specific process is: The ship lock miter gate working environment data includes water flow velocity and water flow fluctuating pressure of each environment monitoring point in a preset monitoring period, and upstream and downstream water levels in a preset monitoring period; The allowable deviation water level, the water flow velocity critical value and the water flow fluctuating pressure critical value are extracted from the automatic control system database, and the ship lock bearing pressure evaluation value is obtained through comprehensive analysis according to the ship lock miter gate working environment data, the ship lock bearing pressure evaluation value is used for quantitatively evaluating the degree of the ship lock bearing external pressure, and provides a basis for adjusting the initial control strategy of the current working condition of the ship lock miter gate.

8. The method according to claim 7, characterized in that: The specific comparison process is: The ship lock bearing pressure evaluation value is compared with the ship lock bearing pressure evaluation threshold, if the ship lock bearing pressure evaluation value is lower than or equal to the ship lock bearing pressure evaluation threshold, it indicates that the ship lock is in a normal running state under the current working condition, and the initial control strategy of the current working condition does not need to be adjusted, if the ship lock bearing pressure evaluation value is higher than the ship lock bearing pressure evaluation threshold, it indicates that the ship lock is in an abnormal running state under the current working condition, then the initial control strategy of the current working condition needs to be adjusted.

9. The method according to claim 8, characterized in that: The specific adjustment process is: If the ship lock bearing pressure evaluation value is higher than the ship lock bearing pressure evaluation threshold value, the ship lock bearing pressure evaluation value is subtracted from the ship lock bearing pressure evaluation threshold value, and according to the difference between the ship lock bearing pressure evaluation value and the ship lock bearing pressure evaluation threshold value, a regulation value of the predicted opening time of the current working condition ship lock miter gate is matched.

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