A flat weir ecological flow transformation and metering system and control method

Abstract

The present invention relates to a flat weir ecological flow transformation and metering system and control method, belonging to the technical field of water conservancy engineering, the water retaining device comprises a water-blocking baffle, a first slot is arranged in the middle of the water-blocking baffle, water-stopping convex grooves are arranged on both side walls of the first slot, a connector is installed on the water-blocking baffle, and the connector is located on the back water side of the water-blocking baffle; the water measuring device comprises a water-measuring weir plate, water-stopping grooves are arranged on both sides of the water-measuring weir plate, a second slot is arranged on the water-measuring weir plate, and the second slot adopts a triangular weir notch thin-wall weir form; the water retaining control mechanism comprises an electric-controlled hydraulic rod, the top of the electric-controlled hydraulic rod is connected to the connector, and the end of the electric-controlled hydraulic rod is fixed below the riverbed ground. The present invention can realize accurate metering and real-time regulation of the downstream flow, enhance the applicability of the device, and effectively ensure that the ecological flow of the downstream river reaches the standard.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a flat weir ecological flow transformation and metering system and a control method. Background Art

[0002] Ecological flow is the basis for maintaining the structure and function of river and lake ecosystems and improving the quality and stability of river and lake ecosystems. At present, the ecological flow of the regulated section is mainly maintained by the required water discharge of upstream water conservancy projects. Therefore, controlling and measuring the discharge flow of upstream water conservancy facilities is the key to ensuring the downstream ecological flow. However, with the development of river hydropower, the increase in water use and the demand for urban water landscape, the number of river-blocking water conservancy projects is increasing, and the normal connectivity of the river is blocked, which poses a great challenge to the guarantee of ecological flow. As a common river water-blocking structure, the flat weir is often used to raise the water level of urban landscapes and increase the upstream and downstream water level difference for water irrigation. However, for the flat weirs with wide application and dense distribution, although the flow can be discharged by adjusting the inclination angle of a single baffle or installing a siphon pipe, the adjustment of the inclination angle of a single baffle cannot achieve accurate measurement and real-time regulation of the discharge flow, and the siphon pipe faces the problems of additional land occupation, affecting the flow state, and high transformation cost. Therefore, there is an urgent need for a flat weir ecological flow transformation and metering system and control method, which, while ensuring accurate measurement and real-time regulation of the ecological flow, also has the advantages of simple structure, saving transformation costs, smooth water flow and no additional land occupation. Summary of the invention

[0003] The invention overcomes the shortcomings of the prior art and provides a flat weir ecological flow transformation and metering system and a control method.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention provides a flat weir ecological flow transformation and metering system, which comprises a water retaining device, a water measuring device, a monitoring device and a water retaining control mechanism:

[0006] The water blocking device comprises a water blocking baffle plate, a first slot is arranged in the middle of the water blocking baffle plate, water stopping convex slots are arranged on both side walls of the first slot, a connector is installed on the water blocking baffle plate, and the connector is located on the back water side of the water blocking baffle plate;

[0007] The water measuring device comprises a water measuring weir plate, water stop grooves are respectively arranged on both sides of the water measuring weir plate, a second slot is arranged on the water measuring weir plate, and the second slot is in the form of a triangular weir notch thin-walled weir;

[0008] The water retaining control mechanism comprises an electric-controlled hydraulic rod, the top end of which is connected to the connector, and the bottom end of which is fixed below the riverbed;

[0009] An electric-controlled winch is installed on the riverbed surface, one end of two traction ropes are connected to the electric-controlled winch, and the other ends of the two traction ropes are respectively fixed to the top of the water measuring weir plate.

[0010] Furthermore, in a preferred embodiment of the present invention, a rotating shaft is provided at the bottom of the water-blocking baffle, and the rotating shaft is fixed to the riverbed. The water-blocking baffle, the rotating shaft and the river channel together form a closed water-blocking system to raise the water level.

[0011] Furthermore, in a preferred embodiment of the present invention, the water measuring weir plate is installed on the water side of the water blocking baffle plate, the water stopping groove and the water stopping convex groove are interconnected, and the height of the water measuring weir plate does not exceed the height of the water blocking baffle plate.

[0012] Furthermore, in a preferred embodiment of the present invention, the width of the first groove is greater than or equal to the width of the second groove, the depth of the first groove is greater than or equal to the depth of the second groove, and the depth of the first groove does not exceed half the height of the water blocking baffle.

[0013] Furthermore, in a preferred embodiment of the present invention, the monitoring device includes a support rod, the support rod is in a right-angle shape, a radar water level gauge is installed on the top of the support rod and extends into the river channel.

[0014] Furthermore, in a preferred embodiment of the present invention, the end of the support rod is fixed to the upstream river bank, and the radar water level meter is connected to a control system for monitoring the real-time water level upstream.

[0015] Furthermore, in a preferred embodiment of the present invention, two traction rods are provided on the backwater side of the water-blocking baffle, and the two traction rods correspond to two traction ropes respectively. Two fixed pulleys are installed inside each traction rod, and the two fixed pulleys are respectively located at the top and bottom ends of the traction rods.

[0016] Furthermore, in a preferred embodiment of the present invention, each of the traction ropes passes through the corresponding traction rod, and the traction ropes are simultaneously wound around the two fixed pulleys.

[0017] Another aspect of the present invention provides a control method for a flat plate weir ecological flow transformation and metering system, which is applied to any of the flat plate weir ecological flow transformation and metering systems described above, and comprises the following steps:

[0018] Preset a target time period, divide the target time period into even sub-time periods, and obtain a timestamp displayed in each sub-time period;

[0019] Obtain the historical water level values ​​corresponding to each time stamp upstream of the flat plate weir, build an upstream water level prediction model based on a support vector machine learning algorithm, import the historical water level values ​​corresponding to each time stamp upstream of the flat plate weir into the prediction model for training, and obtain a trained upstream water level prediction model;

[0020] Obtaining a current timestamp, importing the current timestamp into the trained upstream water level prediction model for calculation, and obtaining a predicted value of the upstream water level at the current timestamp;

[0021] Obtain the angle value between the current water-blocking baffle and the riverbed, and simultaneously obtain the height value of the water-blocking baffle, and calculate the sine trigonometric function by combining the angle value and the height value of the water-blocking baffle to obtain the current discharge height value of the water-blocking baffle;

[0022] Determine whether the upstream water level prediction value is less than the current discharge height value of the water blocking baffle, and if so, calculate the difference between the upstream water level prediction value and the current discharge height value of the water blocking baffle to obtain a deviation threshold;

[0023] A hash algorithm is introduced to calculate the hash value between the current discharge height value of the water-blocking baffle and the deviation value, and the electric-controlled hydraulic rod is retracted and regulated based on the hash value to make the water-blocking baffle descend to achieve the purpose of discharge.

[0024] Furthermore, in a preferred embodiment of the present invention, the following steps are also included:

[0025] Obtaining a bottom height value of a first slot on a water-blocking baffle plate, and determining whether an upstream water level prediction value at a current timestamp is greater than a bottom height value of the first slot on the water-blocking baffle plate;

[0026] If it is greater than, the angle value between the current water blocking baffle and the vertical direction is obtained, and the electric-controlled hydraulic rod is controlled to extend based on the angle value so that the water blocking baffle and the riverbed are in a vertical state. After the extension is completed, the height value of the current water measuring weir plate is obtained;

[0027] Obtaining an empirical formula for ecological flow, constructing an initial calculation model based on the empirical formula for ecological flow, and importing historical water level values ​​corresponding to each time stamp upstream of the flat weir into the initial calculation model for training to obtain an ecological flow calculation model;

[0028] Obtain the distance information between the bottom of the first slot and the bottom of the second slot, import the upstream water level prediction value of the current timestamp into the ecological flow calculation model for calculation, and obtain the downstream ecological flow parameter corresponding to the upstream water level prediction value of the current timestamp;

[0029] A quadratic polynomial regression algorithm is introduced to perform curve fitting on the downstream ecological flow parameter and the distance information to obtain a fitting curve, and a quadratic term coefficient corresponding to the fitting curve is calculated, and an adjustment factor is determined according to the quadratic term coefficient;

[0030] The electric-controlled winch is regulated based on the adjustment factor so that the upstream water level is discharged through the first slot on the water measuring weir plate as an ecological flow.

[0031] The beneficial technical effects of the present invention are:

[0032] The electric-controlled hydraulic rod is controlled to retract. At this time, due to the setting of the rotating shaft, the electric-controlled hydraulic rod will drive the water-blocking baffle to fold downward, thereby achieving the purpose of reducing the angle between the water retaining device and the riverbed, thereby achieving a controllable ecological flow discharge action; when the upstream water level needs to be discharged, the electric-controlled winch is controlled to reverse. At this time, the traction rope will gradually extend and release, and because the traction rope is affected by the gravity of the water-measuring weir plate, the water-measuring weir plate will gradually and controllably descend under the gradual rotation of the electric-controlled winch. When it descends to the specified ecological flow discharge height, the electric-controlled winch stops rotating. At this time, the traction rope pulls the water-measuring weir plate to stop descending synchronously, thereby fixing the height of the water-measuring weir plate, completing the quantitative discharge action, and achieving the purpose of the water-measuring weir plate to discharge the ecological flow of the upstream water level. The present invention effectively combines a water retaining device, a water measuring device, a monitoring device, and a control system, accurately calculates the water flow rate of the water measuring device passing the weir through the weir flow formula, realizes real-time regulation of the ecological flow under dynamic water levels, realizes the real-time metering function of the flat weir with a high metering accuracy, and effectively ensures that the ecological flow rate of the downstream river meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the main structure of a flat weir ecological flow transformation and metering system;

[0035] Figure 2 It is a front view structural schematic diagram of the water retaining device;

[0036] Figure 3 It is a front view structural schematic diagram of the water measuring device;

[0037] Figure 4 It is a schematic diagram of the top view structure of the water measuring weir plate;

[0038] Figure 5 This is a schematic diagram of the installation structure of the water retaining control mechanism.

[0039] The following are the descriptions of the reference numerals:

[0040] 1. Water retaining device; 11. Water retaining baffle; 12. Water stopping groove; 13. Connector; 14. Rotating shaft; 2. Water measuring device; 21. Water measuring weir plate; 22. Water stopping groove; 3. Monitoring device; 31. Support rod; 32. Radar water level gauge; 4. Water retaining control mechanism; 41. Electric-controlled hydraulic rod; 42. Electric-controlled winch; 43. Towing rope; 44. Towing rod; 44a. Fixed pulley. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the structures related to the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0044] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0045] like Figure 1 As shown, the first aspect of the present invention provides a flat weir ecological flow transformation and metering system, which includes a water retaining device 1, a water measuring device 2, a monitoring device 3 and a water retaining control mechanism 4.

[0046] like Figure 1 , 2 As shown, the water blocking device 1 includes a water blocking baffle 11, a first groove is arranged in the middle of the water blocking baffle 11, and water stopping grooves 12 are arranged on both side walls of the first groove respectively. A connector 13 is installed on the water blocking baffle 11, and the connector 13 is located on the back water side of the water blocking baffle 11.

[0047] like Figure 1 , 2 As shown, a rotating shaft 14 is provided at the bottom of the water blocking baffle 11, and the rotating shaft 14 is fixed to the riverbed. The water blocking baffle 11, the rotating shaft 14 and the river channel together form a closed water blocking system to raise the water level.

[0048] like Figure 1 , 2 As shown in Figures 5 and 6, the water retaining control mechanism 4 includes an electrically controlled hydraulic rod 41, the top end of which is connected to the connector 13, and the bottom end of which is fixed below the riverbed.

[0049] It should be noted that when the upstream water level is lower than the height of the first groove on the water-blocking baffle 11, the upstream water level at this time is completely on one side of the water-blocking baffle 11 and the ecological flow cannot be discharged. Therefore, it is necessary to reduce the angle between the water retaining device 1 and the riverbed, that is, fold the water-blocking baffle 11 downward to achieve the discharge of the ecological flow; according to the calculated ecological flow discharge height, the electric-controlled hydraulic rod 41 is controlled to retract. At this time, due to the setting of the rotating shaft 14, the electric-controlled hydraulic rod 41 will drive the water-blocking baffle 11 to fold downward, thereby achieving the purpose of reducing the angle between the water retaining device 1 and the riverbed, thereby achieving a controllable ecological flow discharge action, which greatly improves the stability and quality of the ecological flow between the upstream and downstream of the riverbed, and effectively ensures that the ecological flow of the downstream river meets the standards.

[0050] like Figure 3 , 4As shown, the water measuring device 2 includes a water measuring weir plate 21, and water stop grooves 22 are respectively arranged on both sides of the water measuring weir plate 21. A second groove is arranged on the water measuring weir plate 21, and the second groove adopts a triangular weir notch thin-wall weir form.

[0051] like Figure 3 , 4 As shown, the water measuring weir plate 21 is installed on the water side of the water blocking baffle plate 11 , the water stopping groove 22 is connected to the water stopping convex groove 12 , and the height of the water measuring weir plate 21 does not exceed the height of the water blocking baffle plate 11 .

[0052] The width of the first groove is greater than or equal to the width of the second groove, the depth of the first groove is greater than or equal to the depth of the second groove, and the depth of the first groove does not exceed half of the height of the water blocking baffle.

[0053] It should be noted that the initial state of the water measuring weir plate 21 on the water blocking baffle plate 11 is that the second slot of the water measuring weir plate 21 is flush with or slightly lower than the bottom of the first slot of the water blocking baffle plate. When the upstream water level is higher than the bottom of the first slot, the downstream ecological flow should be accurately calculated based on the upstream real-time water level information using an empirical formula. The downstream ecological flow obtained by calculation is used to drive the water blocking control mechanism 4, so that the water blocking control mechanism 4 drives the water measuring weir plate 21 to rise or fall, thereby being able to accurately control the ecological flow discharge height and realize real-time regulation of the ecological flow under dynamic water levels. The lifting effect between the water measuring weir plate 21 and the water blocking baffle plate 11 is achieved through the limited cooperation of the water stopping groove 22 and the water stopping convex groove 12, which can greatly improve the lifting stability of the water measuring weir plate 21 on the water blocking baffle plate 11, ensure the quality of the downstream control of the upstream and downstream ecological flows by the flat weir, reduce the downstream error and the incidence of water disasters, and at the same time ensure the structural stiffness of the water measuring device 2 and the impact resistance of the ecological flow during the downstream discharge.

[0054] like Figure 1 , 5 As shown, an electric-controlled winch 42 is installed on the riverbed surface, and one end of two traction ropes 43 are connected to the electric-controlled winch 42 , and the other ends of the two traction ropes 43 are respectively fixed to the top of the water measuring weir plate 21 .

[0055] like Figure 1 , 5 As shown, two traction rods 44 are provided on the backwater side of the water blocking baffle 11, and the two traction rods 44 correspond to two traction ropes 43 respectively. Two fixed pulleys 44a are installed inside each traction rod 44, and the two fixed pulleys 44a are respectively located at the top and bottom of the traction rod 44.

[0056] like Figure 1 , 5As shown, each traction rope 43 passes through the corresponding traction rod 44, and the traction rope 43 is wound around the two fixed pulleys 44a at the same time.

[0057] It should be noted that after the empirical formula calculates the downstream ecological flow, the electric-controlled winch 42 is controlled to rotate based on the downstream ecological flow. The rotation of the electric-controlled winch 42 will pull back the traction rope 43, so that the traction rope 43 is pulled. At this time, the pulled traction rope 43 performs a recovery movement on the two fixed pulleys 44a in the traction rod 44, so that the traction rope 43 can stably drive the water-measuring weir plate 21 to do an upward movement, complete the water-measuring weir plate 21 The action of blocking water achieves the purpose of blocking the upstream water level for the ecological flow to be discharged; when the upstream water level needs to be discharged, the electric-controlled winch 42 is controlled to reverse. At this time, the traction rope 43 will gradually extend and be released, and due to the traction rope 43 is affected by the gravity of the water measuring weir plate 21, so as the electric winch 42 gradually rotates, the water measuring weir plate 21 will gradually and controllably descend. When it descends to the specified ecological flow discharge height, the electric winch 42 stops rotating. At this time, the traction rope 43 pulls the water measuring weir plate 21 to stop descending synchronously, thereby fixing the height of the water measuring weir plate 21, completing the quantitative discharge action, and achieving the purpose of the water measuring weir plate 21 to discharge the ecological flow of the upstream water level. Through the effective combination of the water retaining device 1, the water measuring device 2 and the water retaining control mechanism 4, it is effectively ensured that the ecological flow of the downstream river meets the standard, and the quality and efficiency of the ecological flow discharge management are improved, and the reliability is high.

[0058] like Figure 1 As shown, the monitoring device 3 includes a support rod 31, and the support rod 31 is in a right-angle shape. A radar water level gauge 32 is installed on the top of the support rod 31 and extends to the river channel.

[0059] like Figure 1 As shown, the end of the support rod 31 is fixed to the upstream river bank, and the radar water level meter 32 is connected to the control system to monitor the real-time water level upstream.

[0060] It should be noted that when it is necessary to obtain specific water level data upstream, the system controls the radar water level meter 32 to start, so that the radar water level meter 32 performs radar monitoring on the water level upstream, thereby obtaining the water level value, and transmitting the water level value to the control system for further analysis and calculation, thereby accurately calculating the ecological flow discharge, improving the accuracy and reliability of the downstream ecological flow, avoiding large ecological flow discharge errors, and at the same time improving the data acquisition rate, replacing the steps of manual field measurement of water levels, reducing a large amount of labor cost output, saving time and effort, and making the design more humane.

[0061] Another aspect of the present invention provides a control method for a flat plate weir ecological flow transformation and metering system, which is applied to any of the flat plate weir ecological flow transformation and metering systems described above, and comprises the following steps:

[0062] Preset a target time period, divide the target time period into even sub-time periods, and obtain a timestamp displayed in each sub-time period;

[0063] Obtain the historical water level values ​​corresponding to each time stamp upstream of the flat plate weir, build an upstream water level prediction model based on a support vector machine learning algorithm, import the historical water level values ​​corresponding to each time stamp upstream of the flat plate weir into the prediction model for training, and obtain a trained upstream water level prediction model;

[0064] Obtaining a current timestamp, importing the current timestamp into the trained upstream water level prediction model for calculation, and obtaining a predicted value of the upstream water level at the current timestamp;

[0065] Obtain the angle value between the current water-blocking baffle and the riverbed, and simultaneously obtain the height value of the water-blocking baffle, and calculate the sine trigonometric function by combining the angle value and the height value of the water-blocking baffle to obtain the current discharge height value of the water-blocking baffle;

[0066] Determine whether the upstream water level prediction value is less than the current discharge height value of the water blocking baffle, and if so, calculate the difference between the upstream water level prediction value and the current discharge height value of the water blocking baffle to obtain a deviation threshold;

[0067] A hash algorithm is introduced to calculate the hash value between the current discharge height value of the water-blocking baffle and the deviation value, and the electric-controlled hydraulic rod is retracted and regulated based on the hash value to make the water-blocking baffle descend to achieve the purpose of discharge.

[0068] It should be noted that since the discharge of ecological flow needs to be calculated based on the water level upstream of the river, and the water level is changing all the time, in order to be able to respond to the future ecological flow trend of the river in advance, the current water level value can be predicted by constructing a prediction model, and the historical water level upstream of the flat weir is used to train the prediction model. The prediction model can accurately calculate the water level value of the specified timestamp, thereby replacing the manual field measurement steps, saving time and effort; then the predicted current upstream water level value is further analyzed. Since the water-blocking baffle can be folded 90° under the action of the rotating shaft, and the folding angle of the water-blocking baffle needs to be determined according to the current discharge height of the water-blocking baffle, if the upstream water level prediction value does not exceed the current discharge height of the water-blocking baffle Height value, it means that the current discharge height value of the water-blocking baffle has not reached the discharge height of the upstream water level prediction value, so the current inclination angle of the water-blocking baffle can still block the current upstream water level, and the upstream water level must be unable to discharge. The current water-blocking baffle needs to be further lowered, and the discharge height should be lower than the upstream water level value to achieve the ecological flow discharge of the current upstream water level. The deviation threshold can intuitively reflect the distance between the discharge height required by the upstream water level prediction value and the current discharge height value of the water-blocking baffle, so as to control the electric-controlled hydraulic rod according to the two to adjust the discharge height of the water-blocking baffle. The hash algorithm introduced here can quickly assign the specific control amount of the electric-controlled hydraulic rod, reduce complex data conversion steps, and reduce the data calculation error rate.

[0069] Furthermore, in a preferred embodiment of the present invention, the following steps are also included:

[0070] Obtaining a bottom height value of a first slot on a water-blocking baffle plate, and determining whether an upstream water level prediction value at a current timestamp is greater than a bottom height value of the first slot on the water-blocking baffle plate;

[0071] If it is greater than, the angle value between the current water blocking baffle and the vertical direction is obtained, and the electric-controlled hydraulic rod is controlled to extend based on the angle value so that the water blocking baffle and the riverbed are in a vertical state. After the extension is completed, the height value of the current water measuring weir plate is obtained;

[0072] Obtaining an empirical formula for ecological flow, constructing an initial calculation model based on the empirical formula for ecological flow, and importing historical water level values ​​corresponding to each time stamp upstream of the flat weir into the initial calculation model for training to obtain an ecological flow calculation model;

[0073] Obtain the distance information between the bottom of the first slot and the bottom of the second slot, import the upstream water level prediction value of the current timestamp into the ecological flow calculation model for calculation, and obtain the downstream ecological flow parameter corresponding to the upstream water level prediction value of the current timestamp;

[0074] A quadratic polynomial regression algorithm is introduced to perform curve fitting on the downstream ecological flow parameter and the distance information to obtain a fitting curve, and a quadratic term coefficient corresponding to the fitting curve is calculated, and an adjustment factor is determined according to the quadratic term coefficient;

[0075] The electric-controlled winch is regulated based on the adjustment factor so that the upstream water level is discharged through the first slot on the water measuring weir plate as an ecological flow.

[0076] It should be noted that when the upstream water level is too high, the upstream water will cause damage to the downstream and affect the balance of ecological flow. Therefore, when the upstream water level is higher than the first slot of the water-blocking baffle, the water-measuring device needs to be operated to discharge the excessively high upstream water level to ensure that the ecological flow meets the standard. First, the electric-controlled hydraulic rod is adjusted to control the water-blocking baffle to be vertical to the riverbed. Since the downstream ecological flow needs to be calculated through the empirical formula of ecological flow, a model that can quickly calculate the downstream ecological flow is constructed by using the empirical formula of ecological flow to improve the data calculation rate and accuracy and reduce the phenomenon of calculation errors. Then, the adjustment factor is calculated by fitting in the quadratic polynomial regression algorithm based on the upstream water level information and the downstream ecological flow calculation. The adjustment factor is the adjustment range of the lifting distance of the water-measuring weir plate according to the downstream ecological flow. According to different needs, the adjustment factor can be a fixed value or a variable parameter. Finally, the electric winch is controlled to extend and retract according to the adjustment factor to adjust the lifting height of the water-measuring weir plate in real time to discharge the ecological flow of the upstream water level. The present invention can accurately calculate the electric winch control amount required for the discharge of ecological flow, ensure that the ecological flow meets the standard, improve the quality and performance of the river ecological flow, and has high reliability.

[0077] The above is based on the ideal embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A flat plate weir ecological flow transformation and metering system, comprising a water retaining device, a water measuring device, a monitoring device and a water retaining control mechanism, characterized in that: The water blocking device comprises a water blocking baffle plate, a first slot is arranged in the middle of the water blocking baffle plate, water stopping convex slots are arranged on both side walls of the first slot, a connector is installed on the water blocking baffle plate, and the connector is located on the back water side of the water blocking baffle plate; The water measuring device comprises a water measuring weir plate, water stop grooves are respectively arranged on both sides of the water measuring weir plate, a second slot is arranged on the water measuring weir plate, and the second slot is in the form of a triangular weir notch thin-walled weir; The water retaining control mechanism comprises an electric-controlled hydraulic rod, the top end of which is connected to the connector, and the bottom end of which is fixed below the riverbed; An electric-controlled winch is installed on the riverbed surface, one end of two traction ropes is connected to the electric-controlled winch, and the other ends of the two traction ropes are respectively fixed to the top of the water measuring weir plate.

2. A flat weir ecological flow transformation and metering system according to claim 1, characterized in that: A rotating shaft is arranged at the bottom of the water blocking baffle, and the rotating shaft is fixed to the riverbed. The water blocking baffle, the rotating shaft and the river channel together form a closed water blocking system to raise the water level.

3. A flat weir ecological flow transformation and metering system according to claim 1, characterized in that: The water measuring weir plate is installed on the water-facing side of the water blocking baffle plate, the water stopping groove and the water stopping convex groove are connected to each other, and the height of the water measuring weir plate does not exceed the height of the water blocking baffle plate.

4. The flat weir ecological flow transformation and metering system according to claim 1 is characterized in that: The width of the first groove is greater than or equal to the width of the second groove, the depth of the first groove is greater than or equal to the depth of the second groove, and the depth of the first groove does not exceed half of the height of the water blocking baffle.

5. The flat plate weir ecological flow transformation and metering system according to claim 1 is characterized in that: The monitoring device comprises a support rod, which is in a right-angle shape. A radar water level gauge is installed on the top of the support rod and extends to the river channel.

6. A flat plate weir ecological flow transformation and metering system according to claim 5, characterized in that: The end of the support rod is fixed to the upstream river bank, and the radar water level meter is connected to the control system to monitor the real-time water level upstream.

7. The flat plate weir ecological flow transformation and metering system according to claim 1 is characterized in that: Two traction rods are arranged on the backwater side of the water blocking baffle, and the two traction rods correspond to two traction ropes respectively. Two fixed pulleys are installed inside each traction rod, and the two fixed pulleys are respectively located at the top and bottom ends of the traction rod.

8. The flat plate weir ecological flow transformation and metering system according to claim 7 is characterized in that: Each of the traction ropes passes through the corresponding traction rod, and the traction ropes are wound around the two fixed pulleys at the same time.

9. A control method for a flat plate weir ecological flow transformation and metering system, applied to a flat plate weir ecological flow transformation and metering system according to any one of claims 1 to 8, characterized in that: The steps include: Preset a target time period, divide the target time period into even sub-time periods, and obtain a timestamp displayed in each sub-time period; Obtain the historical water level values ​​corresponding to each time stamp upstream of the flat plate weir, build an upstream water level prediction model based on a support vector machine learning algorithm, import the historical water level values ​​corresponding to each time stamp upstream of the flat plate weir into the prediction model for training, and obtain a trained upstream water level prediction model; Obtaining a current timestamp, importing the current timestamp into the trained upstream water level prediction model for calculation, and obtaining a predicted value of the upstream water level at the current timestamp; Obtain the angle value between the current water-blocking baffle and the riverbed, and simultaneously obtain the height value of the water-blocking baffle, and calculate the sine trigonometric function by combining the angle value and the height value of the water-blocking baffle to obtain the current discharge height value of the water-blocking baffle; Determine whether the upstream water level prediction value is less than the current discharge height value of the water blocking baffle, and if so, calculate the difference between the upstream water level prediction value and the current discharge height value of the water blocking baffle to obtain a deviation threshold; A hash algorithm is introduced to calculate the hash value between the current discharge height value of the water-blocking baffle and the deviation threshold, and the electric-controlled hydraulic rod is retracted and regulated based on the hash value to make the water-blocking baffle descend to achieve the purpose of discharge.

10. A control method for flat plate weir ecological flow transformation and metering system according to claim 9, characterized in that: The following steps are also included: Obtaining a bottom height value of a first slot on a water-blocking baffle plate, and determining whether an upstream water level prediction value at a current timestamp is greater than a bottom height value of the first slot on the water-blocking baffle plate; If it is greater than, the angle value between the current water blocking baffle and the vertical direction is obtained, and the electric-controlled hydraulic rod is controlled to extend based on the angle value so that the water blocking baffle and the riverbed are in a vertical state. After the extension is completed, the height value of the current water measuring weir plate is obtained; Obtaining an empirical formula for ecological flow, constructing an initial calculation model based on the empirical formula for ecological flow, and importing historical water level values ​​corresponding to each time stamp upstream of the flat weir into the initial calculation model for training to obtain an ecological flow calculation model; Obtain the distance information between the bottom of the first slot and the bottom of the second slot, import the upstream water level prediction value of the current timestamp into the ecological flow calculation model for calculation, and obtain the downstream ecological flow parameter corresponding to the upstream water level prediction value of the current timestamp; A quadratic polynomial regression algorithm is introduced to perform curve fitting on the downstream ecological flow parameter and the distance information to obtain a fitting curve, and a quadratic term coefficient corresponding to the fitting curve is calculated, and an adjustment factor is determined according to the quadratic term coefficient; The electric-controlled winch is regulated based on the adjustment factor so that the upstream water level is discharged through the second slot on the water-measuring weir plate as an ecological flow.

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