A method for detecting and calculating the opening force of a winch gate

Abstract

The present invention discloses a method for detecting and calculating the door opening force of a winch-type gate, comprising the following steps: S1, the door opening force value obtained by theoretical calculation is used as the reference value F of the door opening force; 启‑基 ; S2, measure the actual door opening force F 启‑实 ; S3, set the acceptable threshold value δ of the door opening force calculation error; S4, measure the parameters required to calculate the door opening force correction coefficient β; S5, train the door opening force correction coefficient β; S6, determine the calculated door opening force F 启‑计 In operation, the present invention obtains relevant parameters during the door opening process and uses a multi-layer perceptron model for training to obtain the door opening force correction coefficient, which has a higher accuracy rate. In the process of calculating the door opening force, the door opening force is obtained by using the door opening force correction coefficient and the parameters of the winch. Compared with the theoretical calculation method, this method involves fewer parameters, has a smaller amount of calculation, and saves time and effort.

Description

Technical Field

[0001] The present invention relates to the field of sluice gates, and in particular to a method for detecting and calculating the gate opening force. Background Art

[0002] The characteristics of the gate opening force of a hydraulic project are directly related to the safe operation of the sluice and are a key component of sluice safety appraisal. After the gate and hoist are installed, their opening force must be tested to ensure it meets the design requirements. The maximum opening force under design conditions is measured and compared with the rated opening force of the hoist. This determines whether the gate opening force meets the design requirements, providing a basis for project management units to formulate operational management measures and methods.

[0003] In existing water conservancy projects, the monitoring of the opening force of electric winch gates is mostly calculated based on the gate hoist series standards specified in the "Design Specifications for Gate Hoists of Water Conservancy and Hydropower Projects". This involves the measurement and calculation of many variables (including water level, water pressure, friction coefficient, weight of the water column acting on the gate, etc.). The actual calculation is highly complex, with poor accuracy, and is time-consuming and labor-intensive. At the same time, it places high demands on the relevant capabilities of the calculation personnel. Summary of the Invention

[0004] In view of this, the present invention provides a method for detecting and calculating the opening force of a winch-type gate, which can effectively avoid the problems caused by the tedious calculations of the gate opening machine series standards specified in the "Design Specifications for Gate Opening Machines for Water Conservancy and Hydropower Projects", while improving the accuracy, effectiveness and convenience of calculating the gate opening force.

[0005] The technical solution of the present invention is: a method for detecting and calculating the opening force of a winch-type gate, comprising the following steps:

[0006] S1. The theoretically calculated door opening force value is used as the reference value F of the door opening force 启-基 ;

[0007] S2. Measure the actual door opening force F 启-实 ;

[0008] S3. Setting an acceptable threshold δ for the door opening force calculation error;

[0009] S4. Measure and calculate the parameters required for the door opening force correction coefficient β;

[0010] S5, training door opening force correction coefficient β;

[0011] S6. Determine and calculate the door opening force F 启-计 .

[0012] In step S1, the calculation method of the theoretical door opening force is: F 启-基=9.8(1.2S×H×f+1.1G-0.9V),

[0013] Where: 1.2, 1.1 and 0.9 are correction coefficients; S is the water outlet area; H is the height from the water outlet center to the design water level; G is the deadweight of the door panel; f is the friction coefficient of the water stop seat; V is the volume of water displaced by the door panel;

[0014] During the gate opening process, when the gate opening increases by 30cm, it is necessary to update and record the water outlet area S, the height from the water outlet center to the design water level H, and the volume of water discharged by the gate plate V, which are used to calculate the theoretical gate opening force within the current gate opening as the gate opening force reference value F within the current opening range. 启-基 .

[0015] In step S2,

[0016] First, place the tension and pressure sensors between the boom and the gate lug;

[0017] Then, the gate opening force is tested from the time the gate is opened until the gate is completely exposed to the water surface; when the gate is opened, the gate opening force is recorded every time the opening increases by 30cm, and the record is maintained for 10 minutes;

[0018] Finally, repeat the test process three times and record the average value corresponding to each 30cm increase in opening during the three tests as the gate opening force F within the current opening. 启-实 .

[0019] In step S3,

[0020] The acceptable threshold δ is the reference value F 启-基 and actual or calculated door opening force F 启-实 / 计 The error rate between: The value is: δ = [0, 0.03].

[0021] In step S4,

[0022] First, install the hoist wire rope tension measuring instrument on the hoist wire rope to be tested to obtain the hoist wire rope traction force;

[0023] Then, the gate raising switch is turned on, and the actual power value of the hoist motor, the traction force of the hoist rope, and the gate rising speed are collected and recorded at each opening interval of 30 cm during the gate rising process through the data acquisition instrument;

[0024] Finally, the above process is repeated three times to obtain the real-time actual power p of the winch motor and the winch rope traction force F at different opening intervals. 牵 and the gate rising speed v.

[0025] In step S5,

[0026] The door-lifting force correction coefficient β is trained using a multi-layer perceptron model; step S4 is repeated to obtain 100 parameters required for the door-lifting force correction coefficient, and the 100 data are divided into 80 training groups and 20 validation groups; the door-lifting force correction coefficient β is trained using the multi-layer perceptron model using the training group data, and the door-lifting force correction coefficient β obtained after training is verified using the validation group. If the error between the calculated door-lifting force in the validation group and the door-lifting force in the validation group is within the range of [0, 0.03], then the door-lifting force correction coefficient β is valid; otherwise, step S4 needs to be repeated to obtain new parameter data for the door-lifting force correction coefficient;

[0027] Among them, the loss function of the multi-layer perceptron model is expressed as:

[0028] Where, subscript i represents the i-th round of training, P i is the power P of the i-th round, V i is the rising speed of the i-th round.

[0029] In step S6,

[0030] The door opening force is calculated by combining the door opening force correction coefficient β with the electric winch tension calculation method:

[0031]

[0032] In the formula, the actual power p of the winch motor and the gate rising speed v are obtained through the actual engineering process;

[0033] Calculate the door opening force F 启-计 Substitute the acceptable threshold formula from step S3 for calculation. When the acceptable threshold is in the range of [0, 0.03], the calculated door opening force is valid.

[0034] If it exceeds this range, steps S4 to S6 are repeated until it is within the acceptable threshold range [0, 0.03].

[0035] In operation, the present invention obtains relevant parameters during the door opening process and uses a multi-layer perceptron model for training to obtain the door opening force correction coefficient, rather than manually calculating it, so the accuracy is higher; in the process of calculating the door opening force, the door opening force is obtained by using the door opening force correction coefficient and the parameters of the winch, which involves fewer parameters than the theoretical calculation method, reduces the amount of calculation, and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a flow chart of the present invention;

[0037] Figure 2 This is a schematic diagram of the door-opening force correction coefficient trained by the multi-layer perceptron. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0041] like Figure 1 As shown, the present invention provides a method for detecting and calculating the opening force of a winch-type gate, comprising the following steps:

[0042] S1. The theoretically calculated door opening force value is used as the reference value F of the door opening force 启-基 ;

[0043] S2. Measure the actual door opening force F 启-实 ;

[0044] S3. Setting an acceptable threshold δ for the door opening force calculation error;

[0045] S4. Measure and calculate the parameters required for the door opening force correction coefficient β;

[0046] S5, training door opening force correction coefficient β;

[0047] S6. Determine and calculate the door opening force F 启-计 .

[0048] The present invention is based on common data acquisition equipment. The method for calculating the opening force of a winch-type gate trains the opening force correction coefficient through a multi-layer perceptron model (i.e., a machine learning method), and obtains the gate opening force in combination with the electric winch tension formula.

[0049] To ensure the gate opening force test is carried out smoothly, before the test begins, it is necessary to ensure the reliability of the inspection equipment and ensure that the equipment is in good operating condition to avoid data errors. Check and ensure that the gate slot structure is in good condition and there are no foreign objects stuck in the gate slot; the gate as a whole has no deformation that affects operation; the gate support device can work normally; the hoist hanger is reliably connected to the gate, the winch hoist wire rope is correctly wound on the drum and pulley, the rope end is firmly fixed, and the wire rope must be safe and reliable; all mechanical components, connection devices, lubrication system, electrical equipment and control system of the hoist are in normal operation.

[0050] The specific steps include:

[0051] S1: The reference value F of the door opening force is obtained through theoretical calculation 启-基 The calculation method of the theoretical door opening force is: Theoretical door opening force = 9.8 (1.2S × H × f + 1.1G - 0.9V) where 1.2, 1.1 and 0.9 are correction coefficients, which are conventionally selected; S is the water outlet area (m 2 ); H is the height from the center of the water outlet to the designed water level (m); G is the deadweight of the door panel (KN); f is the friction coefficient of the water stop seat (cast iron-cast iron: f = 0.18; cast iron-bronze: f = 0.2; stainless steel-bronze: f = 0.15); V is the volume of water displaced by the door panel (m 3 ).

[0052] During the gate opening process, when the gate opening increases by 30cm, it is necessary to update and record the water outlet area S, the height from the water outlet center to the design water level H, and the volume of water discharged by the gate plate V, which are used to calculate the theoretical gate opening force within the current gate opening as the gate opening force reference value F within the current opening range. 启-基 .

[0053] S2: Measure the actual door opening force F 启-实 First, place the tension and pressure sensor between the boom and the gate lug. Testing the gate opening force refers to testing the gate from the time it is opened until it is completely exposed to the water surface. Then, when the gate is opened, the opening force is recorded once every time the opening increases by 30 cm, and the record is maintained for 10 minutes. Finally, to avoid errors, repeat the test process three times, and record the average value corresponding to each 30 cm increase in opening during the three tests as the gate opening force F within the current opening. 启-实 .

[0054] By maintaining the tension for a certain period of time, unnecessary errors can be avoided.

[0055] S3: Set the acceptable threshold value δ of the door opening force calculation error. The acceptable threshold value δ is the reference value F 启-基 and actual / calculated door opening force F 启-实 / 计 The error rate between: Taking into account that the actual measured door-opening force and the calculated door-opening force should not be less than the door-opening force reference value obtained by theoretical calculation, the acceptable threshold δ = [0, 0.03] is set in the present invention to verify whether the calculated door-opening force is valid. The valid door-opening force calculation result must be in the range of 0 to 0.03 (including 0 and 0.03).

[0056] S4: Measure and calculate the various parameters required for the gate opening force correction coefficient β. First, install the winch wire rope tension measuring instrument on the winch wire rope to be measured. Then, turn on the gate rising switch, and use the data acquisition instrument to collect the actual power value of the winch motor, the winch wire rope traction force, and the gate rising speed in each opening interval during the gate rising process at intervals of 30 cm, and record them. Finally, to avoid errors, the above process is repeated three times to obtain the real-time actual power p of the winch motor and the winch wire rope traction force F at different opening intervals. 牵 and the gate rising speed v.

[0057] S5: Training door opening force correction coefficient β. Figure 2 As shown, in order to obtain a reasonable door-lifting force correction coefficient β, the present invention trains the door-lifting force correction coefficient β to be obtained through a multi-layer perceptron model. Repeat step S4 to obtain 100 sets of door-lifting force correction coefficient parameters, and divide the 100 sets of data obtained into a training group (80 sets) and a verification group (20 sets). The door-lifting force correction coefficient β is trained by the multi-layer perceptron model using the training group data, and the door-lifting force correction coefficient β obtained after training is verified by the verification group. If the error between the calculated door-lifting force and the door-lifting force of the verification group through the door-lifting force correction coefficient β in the verification group does not exceed the range of [0,0.03], then it means that the door-lifting force correction coefficient β is valid. Otherwise, it is necessary to repeat step S4 to obtain new door-lifting force correction coefficient parameter data. Wherein, the multi-layer perceptron model is: The lower limit of the loss function L is 0.02. In the formula, the subscript i represents the i-th round of training, P i is the power P of the i-th round, V i is the rising speed of the i-th round.

[0058] Taking into account that the total efficiency of the winch transmission mechanism may change periodically during the use of the winch due to issues such as oil volume, bearing friction and aging, the door-opening force correction coefficient β can be measured and revised regularly according to steps S4 and S5 proposed in the present invention based on actual engineering needs.

[0059] S6: Calculate the door opening force F 启-计 The gate opening pull value is calculated by combining the gate opening force correction coefficient β with the electric winch pull calculation method: Among them, the actual power p of the winch motor and the gate rising speed v can be obtained through the actual engineering process, and the corresponding door opening force F can be calculated. 启-计 Calculate the door opening force F 启-计 Substitute the acceptable threshold calculation in step S3. When the result is within the acceptable threshold range [0, 0.03], the calculated door opening force is valid.

[0060] If it exceeds this range, steps S4 to S6 are repeated until it is within the acceptable threshold range [0, 0.03].

[0061] In practical applications, the actual power p of the winch motor and the gate rising speed v are measured during the gate rising process, and the gate opening force calculation method proposed in the present invention is used to calculate the gate opening force, and it is verified whether the obtained gate opening force meets the acceptable threshold range.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for detecting and calculating the opening force of a winch-type gate, characterized in that: The steps include: S1. The theoretically calculated door opening force value is used as the reference value F of the door opening force 启-基 ; S2. Measure the actual door opening force F 启-实 ; S3. Setting an acceptable threshold δ for the door opening force calculation error; S4. Measure and calculate the parameters required for the door opening force correction coefficient β; S5, training door opening force correction coefficient β; S6. Determine and calculate the door opening force F 启-计 ; In step S4, First, install the hoist wire rope tension measuring instrument on the hoist wire rope to be tested to obtain the hoist wire rope traction force; Then, the gate raising switch is turned on, and the actual power value of the hoist motor, the traction force of the hoist rope, and the gate rising speed are collected and recorded at each opening interval of 30 cm during the gate rising process through the data acquisition instrument; Finally, the above process is repeated three times to obtain the real-time actual power p of the winch motor and the winch rope traction force F at different opening intervals. 牵 and gate rising speed v; In step S5, The door-opening force correction coefficient β is trained using a multi-layer perceptron model; step S4 is repeated to obtain 100 parameters required for the door-opening force correction coefficient, and the 100 data sets are divided into 80 training groups and 20 validation groups; The door-lifting force correction coefficient β is trained using the training group data through the multi-layer perceptron model. The door-lifting force correction coefficient β obtained after training is verified by the verification group. If the error between the calculated door-lifting force and the door-lifting force of the verification group is within the range of [0, 0.03], it means that the door-lifting force correction coefficient β is valid; otherwise, step S4 needs to be repeated to obtain new door-lifting force correction coefficient parameter data; Among them, the loss function of the multi-layer perceptron model is expressed as: Where, subscript i represents the i-th round of training, P i is the power P of the i-th round, V i is the rising speed of the i-th round.

2. A method for detecting and calculating the opening force of a winch-type gate according to claim 1, characterized in that: In step S1, the calculation method of the theoretical door opening force is: F 启-基 =9.8(1.2S×H×f+1.1G-0.9V), Where: 1.2, 1.1 and 0.9 are correction coefficients; S is the water outlet area; H is the height from the water outlet center to the design water level; G is the deadweight of the door panel; f is the friction coefficient of the water stop seat; V is the volume of water displaced by the door panel; During the gate opening process, when the gate opening increases by 30cm, it is necessary to update and record the water outlet area S, the height from the water outlet center to the design water level H, and the volume of water discharged by the gate plate V, which are used to calculate the theoretical gate opening force within the current gate opening as the gate opening force reference value F within the current opening range. 启-基 .

3. A method for detecting and calculating the opening force of a winch-type gate according to claim 1, characterized in that: In step S2, First, place the tension and pressure sensors between the boom and the gate lug; Then, the gate opening force is tested from the time the gate is opened until the gate is completely exposed to the water surface; when the gate is opened, the gate opening force is recorded every time the opening increases by 30cm, and the record is maintained for 10 minutes; Finally, repeat the test process three times and record the average value corresponding to each 30cm increase in opening during the three tests as the gate opening force F within the current opening. 启-实 .

4. A method for detecting and calculating the opening force of a winch-type gate according to claim 1, characterized in that: In step S3, The acceptable threshold δ is the reference value F 启-基 and actual or calculated door opening force F 启-实 / 计 The error rate between: The value is: δ = [0, 0.03].

5. A method for detecting and calculating the opening force of a winch-type gate according to claim 1, characterized in that: In step S6, The door opening force is calculated by combining the door opening force correction coefficient β with the electric winch tension calculation method: In the formula, the actual power p of the winch motor and the gate rising speed v are obtained through the actual engineering process; Calculate the door opening force F 启-计 Substitute the acceptable threshold formula from step S3 for calculation. When the acceptable threshold is in the range of [0, 0.03], the calculated door opening force is valid. If it exceeds this range, steps S4 to S6 are repeated until it is within the acceptable threshold range [0, 0.03].

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