Runoff bypass type measuring device suitable for different flow conditions of ditches

Abstract

The invention discloses a runoff bypass type measuring device suitable for different flow conditions of a ditch, and relates to the technical field of hydrological monitoring. The water collecting mechanism comprises a blocking net installed in the whole width direction of the ditch, a blocking plate arranged in the width direction of the ditch in a sliding mode and a driving assembly controlling the blocking plate to slide, a water collecting channel and a drainage channel are formed in the two sides of the blocking plate respectively, and rubber isolation cloth is fixed to the inner wall, located on one side of the water collecting channel, of the ditch. The width of the water collecting channel is dynamically adjusted through sliding adjustment of the partition plate in the water collecting mechanism, and the double reservoirs of the water flow measuring mechanism are matched for alternate operation, so that the device can adapt to small flow, unstable flow state and large flow; by means of the flexibility, the device is suitable for monitoring requirements of farmland drainage ditches in different scenes such as the small flow condition during drought or the large flow condition during rainfall, and the scene adaptability and practicability of the device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ditch runoff monitoring, and particularly to a runoff bypass measurement device adapted to different flow conditions of ditches. Background Art

[0002] Agricultural non-point source pollution is one of the important factors affecting the water quality safety of river basins. The scientific assessment of its pollution load depends on the accurate monitoring of water quantity and quality. The areas for carrying out agricultural non-point source pollution water quantity monitoring mainly include farmland irrigation and drainage ditches, village drainage ditches, and river cross-sections, etc. Among them, the accurate monitoring of water flow in river channels and ditch cross-sections is the basis for the assessment of agricultural non-point source pollution load, and it is of great significance for accurately preventing and controlling regional agricultural non-point source pollution and protecting the water quality safety of river basins.

[0003] At present, there are various methods for monitoring water flow in ditches and river cross-sections. Commonly used technologies include the flowmeter method, the rotor current meter method, the ultrasonic current meter method, the electromagnetic current meter method, and the non-contact radar wave current meter method, etc. Specifically, the monitoring equipment can be divided into contact-type equipment (such as Doppler ultrasonic flowmeters) and non-contact-type equipment (such as ultrasonic radar flowmeters). Each of these devices has its own applicable conditions and scope of application in actual use, and can meet the flow monitoring requirements in some scenarios. However, in some specific scenarios, such as small water flow environments with small drainage ditch flow and unstable flow patterns, existing flow velocity and flow monitoring devices have significant limitations. On the one hand, small flow rates and unstable flow patterns make it difficult to ensure the measurement accuracy of traditional devices; on the other hand, the size and structure of drainage ditches usually cannot meet the requirements for installing or constructing fixed flow measurement facilities (such as weirs or flumes) of traditional devices. Therefore, existing technical equipment is difficult to effectively meet the accurate flow measurement requirements for small flow rates, unstable water flow conditions in ditch cross-sections, and large flow rates during rainfall at the same time. Summary of the Invention

[0004] The purpose of the present invention is to provide a runoff bypass measurement device adapted to different flow conditions of ditches, which solves the problem that existing flow velocity and flow monitoring devices have significant limitations in small water flow environments with small drainage ditch flow and unstable flow patterns, and can also meet the accurate flow measurement requirements under large flow conditions during rainfall.

[0005] The present invention solves the above technical problems through the following technical solutions. The present invention includes: A water collection mechanism, which is arranged in the ditch. The water collection mechanism includes a partition net installed along the entire width of the ditch, a partition board slidably arranged along the width direction of the ditch, and a driving component for controlling the sliding of the partition board. Water collection channels and drainage channels are respectively formed on both sides of the partition board. A rubber isolation cloth is fixed on the inner wall of the ditch on the side of the water collection channel, and the rubber isolation cloth is laid along the side of the partition net and the partition board in the water collection channel and extends to the drainage channel side of the partition board; A water flow measuring mechanism is arranged on one side of the ditch and is communicated with the water collecting channel, and the total flow of the ditch is calculated based on the width of the water collecting channel and the water flow rate flowing into the water collecting channel; A controller is used to control the operation of the water collecting mechanism and the water flow measuring mechanism, and calculate the total flow of the ditch.

[0006] Preferably, the water flow measuring mechanism includes a water guiding channel communicated with the water collecting channel, and the water guiding channel is respectively communicated with two water storage tanks through two branch channels. A first valve is arranged in the water guiding channel to control the water flow direction. Both of the two water storage tanks are communicated with the ditch through drainage channels, and second valves are arranged at the water inlets of the two drainage channels. First water level detectors are arranged in both of the two water storage tanks.

[0007] Preferably, a light axis fixed to the ditch bank on both sides is arranged above the ditch, and a sliding sleeve fixed to the partition board is slidably arranged on the light axis to realize the sliding of the partition board along the width direction of the ditch.

[0008] Preferably, a light float is slidably arranged on the side surface of the partition board on one side of the drainage channel, and the sliding direction of the light float is along the water flow direction of the ditch. The end of the rubber isolation cloth is fixedly connected to the light float.

[0009] Preferably, a human-shaped block is fixed at one end of the partition board along the water flow direction of the ditch.

[0010] Preferably, the driving assembly includes a hydraulic telescopic device installed on the ditch bank, and the telescopic end of the hydraulic telescopic device is fixedly connected to the partition board to realize the displacement of the partition board.

[0011] Preferably, the driving assembly includes a rectangular through hole opened on the partition board. A turning plate is rotatably installed in the rectangular through hole through a rotating shaft, and a motor for driving the rotating shaft to rotate is installed at the upper end of the partition board.

[0012] Preferably, the measuring device further includes a fixing mechanism for locking the partition board; The fixing mechanism includes a cross plate fixed to the ditch bank and spanning across the ditch and a locking member vertically slidably arranged on the partition board. The locking member is located above the rectangular through hole. When the turning plate is closed in the rectangular through hole, the locking member is pressed against the cross plate to realize the locking of the partition board.

[0013] Preferably, a vertical through hole is communicated and opened above the rectangular through hole. The locking member includes a sliding rod slidably arranged in the vertical through hole. A pressing block is fixed to the upper end of the sliding rod. Inclined surfaces are opened on both sides of the upper end of the turning plate.

[0014] Preferably, a plurality of anti-slip protrusions are arranged on the lower side of the cross plate and the upper side of the pressing block, and the anti-slip protrusions at the upper and lower positions are meshed with each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By sliding and adjusting the partition board in the water collection mechanism of the present invention, the width of the water collection channel is dynamically adjusted, and the alternating operation of the double water storage tanks of the water flow measurement mechanism is coordinated, which can adapt to small flow rates, unstable flow patterns, and large flow rates. This flexibility enables the device to be suitable for the monitoring requirements in different scenarios such as small flow rate conditions during drought or large flow rate conditions during rainfall in agricultural drainage ditches, improving the scene adaptability and practicality of the device; 2. By integrating the water collection mechanism, the water flow measurement mechanism, and the drive assembly, the present invention has a compact structure and high efficiency. The flip plate uses the water flow thrust to drive the partition board, reducing the motor energy consumption; the alternating operation of the double water storage tanks avoids interruption, and the maintenance only requires checking the valves and the rubber isolation cloth. Compared with the complexity of traditional hydraulic drive, the flip plate scheme simplifies the design, reduces component wear, is suitable for long-term outdoor use, and reduces the manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic plan view of the present invention; Figure 2 is a schematic plan view of the water collection mechanism in the present invention; Figure 3 is a schematic three-dimensional structure view of the water collection mechanism in the present invention; Figure 4 is a schematic three-dimensional structure view of the partition board in the present invention; Figure 5 is a schematic structure view of the fixing mechanism in the present invention; Figure 6 is a schematic principle structure view of the movement of the partition board in the present invention.

[0017] The numbers in the figures represent: 1 - ditch; 2 - partition board; 21 - sliding sleeve; 22 - optical axis; 23 - human-shaped block; 3 - partition net; 4 - rubber isolation cloth; 41 - light float; 51 - water diversion channel; 52 - first valve; 53 - water storage tank; 54 - drainage channel; 55 - second valve; 56 - first water level detector; 61 - flip plate; 62 - motor; 71 - cross plate; 72 - abutting block; 73 - inclined surface; 74 - sliding rod; 75 - spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes in detail the above and other technical features and advantages of the present invention with reference to the accompanying drawings.

[0019] This embodiment provides a technical solution: a runoff bypass type measuring device adapted to different flow rate conditions of ditches, such as Figures 1 to 6As shown in the figure, it includes a water collection mechanism, a water flow measurement mechanism, and a controller. The controller is used to control the operation of the water collection mechanism and the water flow measurement mechanism, and calculate the total flow of the ditch. In order to prevent sediment and garbage upstream from damaging or affecting the device, a grit chamber and an interception net for intercepting garbage can be set upstream of the device.

[0020] The water collection mechanism is arranged in the ditch. The water collection mechanism includes a partition net 3 installed along the entire width of the ditch, a partition board 2 slidably arranged along the width direction of the ditch, and a driving component for controlling the sliding of the partition board 2. The partition board 2 works in cooperation with the partition net 3 through sliding arrangement. The end of its downstream end of the water flow contacts the partition net 3 to form a dynamic separation interface, dividing the internal space of the ditch into two areas: a water collection channel and a drainage channel. A rubber isolation cloth 4 is fixed on the inner wall of the ditch on the side of the water collection channel. The rubber isolation cloth 4 is tightly laid along the sides of the partition net 3 and the partition board 2 in the water collection channel and extends to the drainage channel side of the partition board 2, playing a role in sealing and guiding the water flow. The mesh number of the partition net 3 can be set according to needs. It should be noted that it can support the rubber isolation cloth 4 without affecting the normal drainage of the water flow.

[0021] In order for the partition board 2 to be displaced conveniently and easily, the partition board 2 needs to be made of a lightweight material and its interior is hollow.

[0022] Corresponding grooves are provided on both side walls and the bottom of the ditch for inserting the partition net 3, and the bottom of the partition net 3 protrudes from the ditch with a partition portion to effectively prevent water flow from leaking from below, ensuring the integrity of the water flow in the water collection channel and the accuracy of measurement.

[0023] To achieve the flexible displacement of the partition board 2, it is made of a lightweight material and designed as a hollow structure to reduce weight and the load of the driving component. A second water level detector (not shown in the figure) is installed on one side of the ditch to monitor the water level change in the ditch in real time, and a binocular stereo vision camera (not shown in the figure) is equipped on the ditch embankment on the side of the water collection mechanism to accurately measure the position of the partition board 2. The data collected by the binocular stereo vision camera and the second water level detector are transmitted to the controller, providing a real-time basis for the width adjustment of the water collection channel and the flow calculation. The controller monitors the ditch water level through the second water level detector, combines the position of the partition board 2 measured by the binocular stereo vision camera, calculates the water flow cross-sectional area of the water collection channel in real time, and drives the partition board 2 to adjust its position according to the water level change and flow demand. This closed-loop feedback mechanism enables the water collection mechanism to adapt to different flow conditions in the ditch, such as small flow, unstable flow patterns, or large flow, providing a stable input water volume for the subsequent water flow measurement mechanism and finally achieving the accurate calculation of the total flow of the ditch.

[0024] The baffle 2 slides along the width direction of the ditch through the driving component to dynamically adjust the ratio of the water collecting channel to the drainage channel. When the water flow in the ditch is small, the baffle 2 can move towards the drainage channel side to increase the width of the water collecting channel, thereby increasing the amount of water flowing into the water collecting channel for subsequent measurement; when the water flow is large, the baffle 2 moves towards the water collecting channel side to narrow the width of the water collecting channel to avoid water flow overload and maintain measurement accuracy. The rubber isolation cloth 4, as a flexible seal, fits against the partition net 3 and the baffle 2 under the action of water flow, effectively preventing water flow from leaking from the water collecting channel to the drainage channel.

[0025] Through the sliding adjustment of the baffle 2 and the flexible seal design of the rubber isolation cloth 4, the water collection mechanism can dynamically adjust the width of the water collecting channel according to the change of the ditch water flow, effectively adapting to various working conditions such as small flow rate, unstable flow pattern and large flow rate, and improving the applicability of the device in complex environments.

[0026] Above the ditch 1, optical axes 22 fixed to the two-side ditch embankments are provided. The number of the optical axes 22 is at least 2. The optical axes 22, as a horizontal guiding structure, span across the width of the ditch to provide stable support for the sliding of the baffle 2. A sliding sleeve 21 is slidably mounted on the optical axis 22. The sliding sleeve 21 is fixedly connected to the baffle 2. Through the sliding movement of the sliding sleeve 21 on the optical axis 22, the precise displacement of the baffle 2 along the width direction of the ditch is realized, thereby dynamically adjusting the separation ratio of the water collecting channel to the drainage channel. A human-shaped block 23 is fixed at the downstream end of the baffle 2 in the water flow direction. The human-shaped block 23 is designed with two inclined parts. The inclined part located on the water collecting channel side plays a role of smooth transition, blunt the angle between the baffle 2 and the partition net 3, so that the rubber isolation cloth 4 in contact with it can be laid and pulled more smoothly, avoiding wrinkles or uneven stress of the rubber isolation cloth 4 caused by sharp angles. The two inclined parts of the human-shaped block 23 form a streamlined structure at the downstream end of the water flow. The inclined part on the water collecting channel side reduces the sudden change of the angle between the baffle 2 and the partition net 3 through smooth transition, so that the rubber isolation cloth 4 remains flat under the impact of water flow, avoiding local stress concentration or curling phenomenon. At the same time, the inclined part on the drainage channel side can guide the water flow to pass smoothly, reducing eddy current and resistance. This structure not only facilitates the rubber isolation cloth 4 to be pulled by the water flow to maintain the seal, but also reduces the direct impact force of the water flow on the baffle 2, enhancing the stability of the device.

[0027] On the side of the baffle plate 2 on one side of the drainage channel, a light float 41 is provided to slide along the direction of the water flow. The sliding path of the light float 41 is consistent with the direction of the water flow in the ditch, and it is fixedly connected to the end of the rubber isolation cloth 4. The light float 41 is made of lightweight material, has a low density and good buoyancy characteristics, and when impacted by water flow, it can generate sufficient pulling force to pull the rubber isolation cloth 4 to unfold along the direction of the water flow and keep it in a tensioned state to ensure the effective realization of its function. It should be noted that the maximum stroke of the light float 41 will not move to the position of the flip plate 61 to avoid interference with the light float 41 when the flip plate 61 flips.

[0028] An optional embodiment of the driving assembly is: the driving assembly includes a hydraulic telescopic device fixedly mounted on the ditch bank, the hydraulic telescopic device is equipped with a controllable telescopic end, and the telescopic end is fixed to the baffle plate 2 through a firm mechanical connection to achieve precise displacement of the baffle plate 2 along the ditch width direction. The hydraulic telescopic device provides a stable driving force through the hydraulic system to ensure that the baffle plate 2 can smoothly and reliably adjust its position under different water flow conditions.

[0029] The driving components of the above hydraulic telescopic equipment are relatively dependent on the operation of the hydraulic system, including hydraulic pumps, oil pipes, valves, seals and other components, and the structure is relatively complex. In long-term use, the hydraulic oil may leak or be contaminated, and the seals may fail due to wear. In addition, in outdoor environments such as ditches, dust, water vapor or sediment may enter the hydraulic system, increasing the frequency and difficulty of maintenance. The maintenance cost and technical requirements are increased, and it may not be suitable for applications in resource-limited or remote areas.

[0030] Therefore, this embodiment also proposes another driving assembly, which has a simple structure and is more convenient to maintain. It includes a rectangular through hole opened in the baffle plate 2, in which a flip plate 61 is installed to rotate through a rotating shaft, and a motor 62 for driving the rotating shaft to rotate is installed on the upper end of the baffle plate 2, and the rotating shaft is located at the end of the flip plate 61 in the upstream direction of the water flow. The specific sizes of the rectangular through hole and the flip plate 61 are set according to needs, that is, by running the motor 62, the flip plate 61 is flipped out of the rectangular through hole at a certain angle, and the corresponding part of the rubber isolation cloth 4 is pressed into an inclined protrusion, the water flow resistance on the side where the inclined protrusion is located increases, and the water flow thrust is increased accordingly, pushing the baffle plate 2 to slide along the optical axis 22 to the other side, so that the baffle plate 2 is displaced to the other side ( Figure 6 The hollow arrow in the figure represents the flow direction of the water flow, and the solid arrow represents the sliding direction of the baffle plate 2), thereby achieving the effect of adjusting the position of the baffle plate 2 and the width of the water collection channel.

[0031] For example, if the turning plate 61 turns towards the water collecting channel side, the rubber isolation cloth 4 forms an inclined bulge on the water collecting channel side, increasing the water flow thrust on the water collecting channel side, causing the partition plate 2 to move towards the drainage channel side, thereby increasing the width of the water collecting channel; conversely, if the turning plate 61 turns towards the drainage channel side, it will push the partition plate 2 towards the water collecting channel side, reducing the width of the water collecting channel. This design cleverly utilizes the natural force of water flow as the driving force. The motor 62 only needs to provide the angle adjustment of the turning plate 61, rather than directly driving the entire displacement of the partition plate 2, thus achieving the maximization of energy efficiency. The turning angle can be precisely adjusted by the controller according to the position data of the partition plate 2 detected by the second water level detector and the binocular stereo vision camera, forming a closed-loop feedback mechanism to ensure the real-time matching of the water collecting channel width and the flow demand. Moreover, it reduces the use of complex mechanical structures, lowers the manufacturing cost and maintenance difficulty, and improves the reliability of long-term operation.

[0032] In this type of driving component, a fixing mechanism for locking the partition plate 2 is also provided to prevent the partition plate 2 from being displaced by the water flow; the fixing mechanism includes a cross plate 71 fixed to the ditch bank and spanning across the ditch, and a locking member vertically slidably arranged on the partition plate 2. The locking member is located above the rectangular through hole. When the turning plate 61 closes within the rectangular through hole, the locking member is pressed against the cross plate 71 to lock the partition plate 2.

[0033] A vertical through hole is communicated and opened above the rectangular through hole. The locking member includes a sliding rod 74 slidably arranged within the vertical through hole. A resisting block 72 is fixed to the upper end of the sliding rod 74. Inclined surfaces 73 are respectively opened on both sides of the upper end of the turning plate 61. In order to make the sliding rod 74 descend more sensitively, a spring 75 can be sleeved outside the sliding rod 74. Based on the acting force of the sliding rod 74 moving downward, the hemispherical portion at the lower end of the sliding rod 74 is designed to be in sliding fit with the inclined surface 73, so that the turning plate 61 can smoothly push the sliding rod 74 upward during the closing process, ensuring the reliable triggering of the locking.

[0034] The principle of the fixing mechanism is based on the synergistic effect of mechanical linkage and elastic reset, realizing the locking and unlocking of the partition plate 2 through the state change of the turning plate 61. The cross plate 71 serves as a fixed reference component, spanning across the ditch and fixed to the bank, providing a stable locking reference surface. The core component of the locking member, the sliding rod 74, slides up and down on the partition plate 2 through the vertical through hole. The contact between the resisting block 72 at its upper end and the cross plate 71 constitutes the locking point. When the turning plate 61 is in the closed state (i.e., completely embedded within the rectangular through hole), the inclined surface 73 at its upper end contacts the hemispherical portion at the lower end of the sliding rod 74. Through the slope effect of the inclined surface, the sliding rod 74 is jacked upward until the resisting block 72 closely adheres to the cross plate 71, thereby restricting the horizontal movement of the partition plate 2 along the optical axis 22. At this time, the partition plate 2 is firmly locked and will not be displaced even under the impact of the water flow.

[0035] When it is necessary to adjust the position of the partition plate 2, the motor 62 drives the flip plate 61 to flip and protrude from the rectangular through-hole. The flip plate 61 disengages from the hemispherical portion of the slide bar 74. Under the downward pre-tightening force of the spring 75, the slide bar 74 quickly descends, and the abutting block 72 separates from the cross plate 71, releasing the locked state. This mechanism realizes the coordination of the driving and locking functions through a single action of the flip plate 61, avoiding the need for an additional independent driving source, simplifying the system structure, and improving the integration and operating efficiency of the driving components.

[0036] The fixing mechanism utilizes the principles of mechanical contact and elastic reset, reduces the use of complex electronic components, reduces the influence of environmental factors (such as humidity and temperature) on the function, and enhances the long-term durability of the device in the outdoor ditch environment.

[0037] A plurality of anti-slip protrusions are processed on the lower surface of the cross plate 71 and the upper surface of the abutting block 72, and the upper and lower corresponding anti-slip protrusions can mesh with each other to form a tight fitting structure. These anti-slip protrusions are regularly distributed along the width direction of the ditch. By increasing the contact friction force between the cross plate 71 and the abutting block 72, the stability of the partition plate 2 in the locked state is ensured. The vertical cross-section of the anti-slip protrusion is preferably designed as a triangular structure to optimize the meshing mechanical properties and improve the reliability of locking.

[0038] The water flow measuring mechanism is arranged on one side of the ditch and is communicated with the water collecting channel. Based on the water flow flowing into the water collecting channel, the total flow of the ditch is measured; the water flow measuring mechanism includes a water guiding channel 51 communicated with the water collecting channel, and the water guiding channel 51 is respectively communicated with two water storage tanks 53 through two branch channels. A first valve 52 for controlling the water flow direction is arranged in the water guiding channel 51. Both of the two water storage tanks 53 are communicated with the ditch 1 through a drainage channel 54, and second valves 55 are arranged at the water inlets of the two drainage channels 54. First water level detectors 56 are arranged in both of the two water storage tanks 53. The water flow can be controlled to flow into the two water storage tanks 53 in sequence through the first valve 52. When the water in a corresponding water storage tank 53 is full, the corresponding second valve 55 can be opened to discharge the water in the water storage tank 53.

[0039] The principle of the water flow measurement mechanism is based on a combined method of time-sharing water storage and volume measurement. By controlling the diversion and discharge of water flow, the total flow of the ditch is indirectly calculated. The water diversion channel 51 serves as the water flow passage between the water collection channel and the water storage tank 53. Through the switching function of the first valve 52, the water flow in the water collection channel is distributed to the two water storage tanks 53 as needed. The two water storage tanks 53 are designed in a parallel mode, and each water storage tank has a known fixed volume. When the water flow enters one of the water storage tanks 53 through the water diversion channel 51, the first water level detector 56 monitors the rising process of the water level in real time until the water level reaches the preset full-load height. At this time, the controller records the time required for the water storage tank 53 to be filled, closes the first valve 52 to supply water to this branch channel, and simultaneously opens the valve of the other branch channel to switch the water flow to the second water storage tank 53. At the same time, the second valve 55 of the full-load water storage tank 53 is opened, and the water is drained back to the ditch 1 through the drainage channel 54. After being emptied, the second valve 55 is closed to prepare for the next round of water storage.

[0040] The controller is a programmable logic controller (PLC). For example, a programmable logic controller of the Siemens S7-1200 model can be selected. It is connected to the first valve 52, the second valve 55, the first water level detector 56, the second water level detector, the binocular stereo vision camera, and the motor 62 through data transmission lines. The programmable logic controller controls the opening, closing, and operation of the motor 62, the first valve 52, and the second valve 55 through digital output (DO), that is, to realize the control of the operation of the water collection mechanism and the water flow measurement mechanism.

[0041] In addition, the programmable logic controller collects the water level data of the first water level detector 56 and the second water level detector and the cross-sectional area of the water flow in the water collection channel detected by the binocular stereo vision camera through digital input. The real-time clock module (RTC) built into the programmable logic controller can accurately monitor the time required for the water storage tank 53 to store water. The CPU built into the programmable logic controller supports mathematical operations. Input the calculation formula (the specific formula is shown below) and related known parameters (the volume of the water storage tank 53, the total width of the ditch) into the programmable logic controller, and then through the measured variable parameters (the water storage time of the water storage tank 53, the cross-sectional area of the water flow in the water collection channel), the CPU of the programmable logic controller can substitute the known parameters and variable parameters into the calculation formula to calculate the total flow of the ditch.

[0042] The total flow rate of the ditch is calculated based on the following steps: First, the water flow rate flowing into the reservoir 53 per unit time, that is, the water flow rate of the water collection channel, is calculated through the known volume of the reservoir 53 and the water storage time; then, in combination with the ratio of the width of the water collection channel to the total width of the ditch (determined by the position of the partition board 2), the total flow rate of the ditch is deduced. This alternating operation mode of the double reservoirs ensures the continuity of measurement and avoids the interruption problem in single reservoir measurement. The coordinated control of the first valve 52 and the second valve 55, as well as the precise monitoring of the first water level detector 56, constitute a closed-loop system that can adapt to the changes in the water flow of the water collection channel in real time and provide stable measurement data. It should be noted that: when the water collection mechanism is collecting water, there may be a certain amount of water leakage, but the amount of water leakage is controlled within an acceptable error range.

[0043] The specific calculation process is as follows: Calculate the water flow rate of the water collection channel :

[0044] Among them, is the total volume of water storage , is the water storage time , The unit is , and the total volume of water storage can be the total capacity of multiple reservoirs 53, and the water storage time is the water storage time of these multiple reservoirs 53; Calculate the ratio of the width of the water collection channel to the total width of the ditch: Among them, is the width of the water collection channel , is the total width of the ditch , the width of the water collection channel is measured by a binocular stereo vision camera, and the total width of the ditch is known; The total flow rate of the ditch : Among them, the unit is .

[0045] The above is only the preferred embodiment of the present invention, which is illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims

1. A runoff bypass measuring device adapted to different flow conditions in ditches, characterized in that: include: A water collection mechanism is arranged in the ditch, and the water collection mechanism comprises a baffle installed along the entire width of the ditch, a baffle plate slidingly arranged along the width of the ditch, and a driving assembly for controlling the sliding of the baffle plate. A water collection channel and a drainage channel are formed on both sides of the baffle plate, respectively. A rubber isolation cloth is fixed to the inner wall of the ditch on one side of the water collection channel. The rubber isolation cloth is laid along the side of the baffle plate and the baffle plate in the water collection channel, and extends to the drainage channel side of the baffle plate; A water flow measuring mechanism is arranged at one side of the ditch and is connected to the water collection channel, and measures the total flow of the ditch based on the water flow flowing into the water collection channel; The controller is used to control the operation of the water collection mechanism and the water flow measurement mechanism, and calculate the total flow of the ditch.

2. The runoff bypass measuring device adapted to different flow conditions of ditches according to claim 1, characterized in that: The water flow measuring mechanism includes a water diversion channel connected to a water collection channel, and the water diversion channel is connected to two water reservoirs through two branch water channels respectively. A first valve is provided in the water diversion channel to control the direction of water flow. Both of the two water reservoirs are connected to the ditch through a drainage channel, and a second valve is provided at the water inlet of the two drainage channels. Both of the water reservoirs are provided with a first water level detector.

3. The runoff bypass measuring device adapted to different flow conditions of ditches as claimed in claim 1, characterized in that: An optical axis fixed to the ditch banks on both sides is arranged above the ditch, and a sliding sleeve fixed to the baffle plate is slidably arranged on the optical axis to enable the baffle plate to slide along the width direction of the ditch.

4. The runoff bypass measuring device adapted to different flow conditions of a ditch according to claim 1, characterized in that: A light float is slidingly arranged on the side of the baffle plate located on one side of the drainage channel, and the sliding direction of the light float is along the direction of water flow in the ditch, and the end of the rubber isolation cloth is fixedly connected to the light float.

5. The runoff bypass measuring device adapted to different flow conditions of ditches as claimed in claim 1, characterized in that: A human-shaped block is fixed to one end of the baffle plate along the direction of water flow in the ditch.

6. The runoff bypass measuring device adapted to different flow conditions of a ditch according to claim 1, characterized in that: The driving assembly comprises a hydraulic telescopic device installed on the ditch bank, and the telescopic end of the hydraulic telescopic device is fixedly connected to the baffle plate to achieve driving the displacement of the baffle plate.

7. The runoff bypass measuring device adapted to different flow conditions of a ditch according to claim 1, characterized in that: The driving assembly comprises a rectangular through hole opened in the baffle plate, a flip plate is rotatably mounted in the rectangular through hole via a rotating shaft, and a motor for driving the rotating shaft to rotate is mounted on the upper end of the baffle plate.

8. The runoff bypass measuring device adapted to different flow conditions of a ditch according to claim 7, characterized in that: The measuring device also includes a fixing mechanism for locking the baffle plate; The fixing mechanism includes a horizontal plate fixed to the ditch bank and spanning the ditch, and a locking piece vertically slidably arranged on the baffle plate. The locking piece is located on the upper side of the rectangular through hole. When the flip plate is closed in the rectangular through hole, the locking piece is pressed against the horizontal plate to lock the baffle plate.

9. The runoff bypass measuring device adapted to different flow conditions of a ditch according to claim 8, characterized in that: The upper side of the rectangular through hole is connected to a vertical through hole, the locking member comprises a slide rod slidably arranged in the vertical through hole, a stop block is fixed to the upper end of the slide rod, and inclined surfaces are provided on both sides of the upper end of the flip plate.

10. The runoff bypass measuring device adapted to different flow conditions of a ditch according to claim 9, characterized in that: A plurality of anti-skid protrusions are arranged on the lower side of the transverse plate and the upper side of the stop block, and the anti-skid protrusions at the upper and lower positions are meshed with each other.

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