A runoff bypass measurement device adapted to different flow conditions in ditches

Abstract

The present invention discloses a runoff bypass measurement device adapted to different flow conditions in ditches, which relates to the technical field of hydrological monitoring. It includes a water collection mechanism 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. Through the sliding adjustment of the partition board in the water collection mechanism and the alternating operation of the double storage pools of the water flow measurement mechanism, the present invention can dynamically adjust the width of the water collection channel, and can adapt to small flow rates, unstable flow states, and large flow rates. This flexibility enables the device to meet the monitoring requirements in different scenarios such as small flow rate conditions during drought or large flow rate conditions during rainfall in farmland drainage ditches, improving the scene adaptability and practicality of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of ditch runoff monitoring, and particularly relates 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 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. Common 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 rates and unstable flow patterns, the existing flow velocity and flow rate monitoring equipment has significant limitations. On the one hand, small flow rates and unstable flow patterns make it difficult to guarantee the measurement accuracy of traditional equipment; on the other hand, the size and structure of drainage ditches usually cannot meet the requirements for installing or building fixed flow measurement facilities (such as weirs or flumes) of traditional equipment. Therefore, the existing technical equipment is difficult to effectively meet the accurate flow measurement requirements for both 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 the existing flow velocity and flow rate monitoring equipment has significant limitations in small water flow environments with small drainage ditch flow rates and unstable flow patterns, and can also meet the accurate flow measurement requirements under large flow rate conditions during rainfall.

[0005] The present invention solves the above technical problems through the following technical solutions. The present invention includes:

[0006] 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. The rubber isolation cloth is laid along the partition net and the side surface of the partition board in the water collection channel, and extends to the drainage channel side of the partition board;

[0007] 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;

[0008] 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.

[0009] 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.

[0010] Preferably, a light axis fixed to the ditch bank embankments 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 enable the partition board to slide along the width direction of the ditch.

[0011] Preferably, a floating buoy is slidably arranged on the side surface of the partition board on one side of the drainage channel, and the sliding direction of the floating buoy is along the water flow direction of the ditch. The end of the rubber isolation cloth is fixedly connected to the floating buoy.

[0012] Preferably, a human-shaped block is fixed to one end of the partition board along the water flow direction of the ditch.

[0013] Preferably, the driving assembly includes a hydraulic telescopic device installed on the ditch bank embankment, and the telescopic end of the hydraulic telescopic device is fixedly connected to the partition board to drive the partition board to displace.

[0014] Preferably, the driving assembly includes a rectangular through hole opened on the partition board. A turnover 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.

[0015] Preferably, the measuring device further includes a fixing mechanism for locking the partition board;

[0016] The fixing mechanism includes a cross plate fixed to the ditch bank embankment 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 turnover plate is closed in the rectangular through hole, the locking member is pressed against the cross plate to lock the partition board.

[0017] 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 respectively opened on both sides of the upper end of the turnover plate.

[0018] Preferably, a plurality of anti-slip protrusions are provided on the lower side of the horizontal plate and the upper side of the abutting block, and the anti-slip protrusions at the upper and lower positions are engaged with each other.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. Through the sliding adjustment of 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 pools of the water flow measurement mechanism is coordinated, enabling it to adapt to small flow rates, unstable flow patterns, and large flow rates. This flexibility makes the device suitable for the monitoring requirements in different scenarios such as small flow rate conditions during drought or large flow rate conditions during rainfall in farmland drainage ditches, improving the device's adaptability and practicality to different scenarios;

[0021] 2. By integrating the water collection mechanism, the water flow measurement mechanism, and the driving component, 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 energy consumption of the motor; the alternating operation of the double water storage pools avoids interruption, and maintenance only requires checking the valves and the rubber isolation cloth. Compared with the complexity of traditional hydraulic drive, the flip plate solution 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

[0022] Figure 1 is a schematic plan view of the present invention;

[0023] Figure 2 is a schematic plan view of the water collection mechanism in the present invention;

[0024] Figure 3 is a schematic three-dimensional view of the water collection mechanism in the present invention;

[0025] Figure 4 is a schematic three-dimensional view of the partition board in the present invention;

[0026] Figure 5 is a schematic view of the structure of the fixing mechanism in the present invention;

[0027] Figure 6 is a schematic view of the principle structure of the movement of the partition board in the present invention.

[0028] The numbers in the figures represent:

[0029] 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 pool; 54 - drainage channel; 55 - second valve; 56 - first water level detector; 61 - flip plate; 62 - motor; 71 - horizontal plate; 72 - abutting block; 73 - inclined surface; 74 - sliding rod; 75 - spring. DETAILED DESCRIPTION OF THE INVENTION

[0030] The following further elaborates on the above and additional technical features and advantages of the present invention in conjunction with the accompanying drawings.

[0031] This embodiment provides a technical solution: a runoff bypass measurement device adapted to different flow conditions in a ditch, as Figures 1 to 6 shown, which 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. To avoid damage or influence on this device caused by sediment and garbage upstream, a grit chamber and an interception net for intercepting garbage can be provided upstream of this device.

[0032] 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 cooperates with the partition net 3 through the sliding setting. The end of its downstream end of the water flow contacts the partition net 3, forming a dynamic separation interface, which divides 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 closely 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 needs to be able to support the rubber isolation cloth 4 without affecting the normal drainage of the water flow.

[0033] 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.

[0034] 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 block the leakage of water flow from below, ensuring the integrity of the water flow in the water collection channel and the accuracy of measurement.

[0035] To achieve the flexible displacement of the partition board 2, it is made of lightweight materials and designed as a hollow structure to reduce weight and the load on 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, while a binocular stereo vision camera (not shown in the figure) is equipped on the ditch bank 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 adjustment of the water collection channel width and 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 cross-sectional area of the water flow in 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 low flow, unstable flow patterns, or high flow, providing a stable input water volume for the subsequent water flow measurement mechanism and ultimately achieving the accurate calculation of the total ditch flow.

[0036] The partition board 2 slides along the width direction of the ditch through the driving component, dynamically adjusting the ratio of the water collection channel to the drainage channel. When the water flow in the ditch is small, the partition board 2 can move towards the drainage channel side to increase the width of the water collection channel, thereby increasing the amount of water flowing into the water collection channel for subsequent measurement; when the water flow is large, the partition board 2 moves towards the water collection channel side to narrow the width of the water collection 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 partition board 2 under the action of water flow, effectively preventing water leakage from the water collection channel to the drainage channel.

[0037] Through the sliding adjustment of the partition board 2 and the flexible seal design of the rubber isolation cloth 4, the water collection mechanism can dynamically adjust the width of the water collection channel according to the change of the ditch water flow, effectively adapting to various working conditions such as low flow, unstable flow patterns, and high flow, and improving the applicability of the device in complex environments.

[0038] Above the ditch 1, there is a light axis 22 fixed to the ditch banks on both sides. The number of light axes 22 is at least 2. As a horizontal guiding structure, the light axis 22 spans the width of the ditch and provides stable support for the sliding of the partition board 2. A sliding sleeve 21 is slidably mounted on the light axis 22. The sliding sleeve 21 is fixedly connected to the partition board 2. Through the sliding movement of the sliding sleeve 21 on the light axis 22, the precise displacement of the partition board 2 in the width direction of the ditch is realized, so as to dynamically adjust the separation ratio between the water collecting channel and the drainage channel. At the downstream end of the partition board 2 in the water flow direction, there is a human-shaped block 23 fixed. The human-shaped block 23 is designed with two inclined parts. The inclined part on the side of the water collecting channel plays a role of smooth transition, blunt the angle between the partition board 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 side of the water collecting channel reduces the sudden change of the angle between the partition board 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 side of the drainage channel 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 sealing, but also reduces the direct impact force of the water flow on the partition board 2, enhancing the stability of the device.

[0039] On the side of the partition board 2 on the drainage channel side, a light float 41 is slidably arranged along the water flow direction. The sliding path of the light float 41 is consistent with the water flow direction of the ditch, and it is fixedly connected to the end of the rubber isolation cloth 4. The light float 41 is made of lightweight materials, has a low density and good buoyancy characteristics. When impacted by water flow, it can generate sufficient pulling force to pull the rubber isolation cloth 4 to unfold and remain in a tensioned state along the water flow direction 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 between the flip plate 61 and the light float 41 when the flip plate 61 flips.

[0040] An optional embodiment of the driving assembly is: the driving assembly includes a hydraulic telescopic device fixedly installed on the ditch bank. The hydraulic telescopic device is configured with a controllable telescopic end, and the telescopic end is fixed to the partition board 2 through a firm mechanical connection to realize the precise displacement of the partition board 2 in the width direction of the ditch. The hydraulic telescopic device provides stable driving force through the hydraulic system to ensure that the partition board 2 can smoothly and reliably adjust its position under different water flow conditions.

[0041] 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.

[0042] 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.

[0043] For example, if the flip plate 61 flips toward the water collection channel, the rubber isolation cloth 4 forms an inclined protrusion on the water collection channel side, increasing the water flow thrust on the water collection channel side, causing the baffle plate 2 to move toward the drainage channel side, thereby increasing the width of the water collection channel; conversely, if the flip plate 61 flips toward the drainage channel side, it pushes the baffle plate 2 to move toward the water collection channel side, thereby reducing the width of the water collection channel. This design cleverly utilizes the natural force of water flow as a driving force. The motor 62 only needs to provide angle adjustment for the flip plate 61, rather than directly driving the entire displacement of the baffle plate 2, thereby maximizing energy efficiency. The flip angle can be accurately adjusted by the controller according to the position data of the baffle plate 2 detected by the second water level detector and the binocular stereo vision camera, forming a closed-loop feedback mechanism to ensure real-time matching of the water collection channel width with the flow demand. It also reduces the use of complex mechanical structures, reduces manufacturing costs and maintenance difficulties, and improves long-term operation reliability.

[0044] In this type of driving assembly, a fixing mechanism for locking the baffle plate 2 is also provided to prevent the baffle plate 2 from being displaced by water flow; the fixing mechanism includes a horizontal plate 71 fixed to the ditch bank and spanning the ditch, and a locking member vertically slidably arranged on the baffle plate 2, and the locking member is located on the upper side of the rectangular through hole. When the flip plate 61 is closed in the rectangular through hole, the locking member is pressed against the horizontal plate 71 to achieve locking of the baffle plate 2.

[0045] A vertical through hole is provided on the upper side of the rectangular through hole. The locking piece includes a slide bar 74 slidably arranged in the vertical through hole. A stop block 72 is fixed to the upper end of the slide bar 74. Inclined surfaces 73 are provided on both sides of the upper end of the flip plate 61. In order to make the slide bar 74 descend more sensitively, a spring 75 can be sleeved on the outer side of the slide bar 74. The spring 75 is based on the force of the slide bar 74 moving downward. The hemispherical portion at the lower end of the slide bar 74 is designed to slide with the inclined surface 73, so that the flip plate 61 can smoothly push the slide bar 74 upward during the closing process, thereby ensuring reliable triggering of the lock.

[0046] The principle of the fixing mechanism is based on the synergistic effect of mechanical linkage and elastic reset, and the locking and unlocking of the baffle plate 2 is achieved by the state change of the flip plate 61. The horizontal plate 71 serves as a fixed reference member, spanning the ditch and fixed to the embankment, providing a stable locking reference surface. The core component of the locking member, the slide bar 74, slides up and down on the baffle plate 2 through the vertical through hole, and the contact between the stop block 72 at its upper end and the horizontal plate 71 constitutes a locking point. When the flip plate 61 is in a closed state (i.e., completely embedded in the rectangular through hole), the inclined surface 73 at its upper end contacts the hemispherical portion of the lower end of the slide bar 74, and the slide bar 74 is lifted upward by the slope effect of the inclined surface until the stop block 72 is close to the horizontal plate 71, thereby limiting the horizontal movement of the baffle plate 2 along the optical axis 22. At this time, the baffle plate 2 is firmly locked and will not be displaced even if it is impacted by water flow.

[0047] When the position of the baffle plate 2 needs to be adjusted, the motor 62 drives the flip plate 61 to flip and protrude from the rectangular through hole, and the flip plate 61 is separated from the hemispherical portion of the slide bar 74. The slide bar 74 rapidly drops under the downward preload of the spring 75, and the stop block 72 is separated from the cross plate 71, releasing the locked state. This mechanism achieves the coordination of the driving and locking functions through a single action of the flip plate 61, avoids the need for an additional independent driving source, simplifies the system structure, and improves the integration and operation efficiency of the driving components.

[0048] The fixing mechanism utilizes the principle of mechanical contact and elastic reset, which reduces the use of complex electronic components, reduces the impact 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.

[0049] The lower surface of the horizontal plate 71 and the upper surface of the stopper 72 are processed with multiple anti-skid protrusions, and the corresponding anti-skid protrusions above and below can mesh with each other to form a tightly fitting structure. These anti-skid protrusions are regularly distributed along the width of the ditch, and the stability of the baffle plate 2 in the locked state is ensured by increasing the contact friction between the horizontal plate 71 and the stopper 72. The vertical cross-section of the anti-skid protrusion is preferably designed as a triangular structure to optimize the meshing mechanical properties and improve the reliability of the locking.

[0050] The water flow measuring mechanism is arranged on one side of the ditch and is connected to the water collecting channel. The total flow of the ditch is calculated based on the water flow flowing into the water collecting channel. The water flow measuring mechanism includes a water inlet channel 51 connected to the water collecting channel. The water inlet channel 51 is respectively connected to two water storage tanks 53 through two branch channels. A first valve 52 for controlling the water flow direction is arranged in the water inlet channel 51. Both of the two water storage tanks 53 are connected to 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 first valve 52 can be used to control the water flow to flow into the two water storage tanks 53 in sequence. 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.

[0051] The principle of the water flow measuring mechanism is based on a combined method of time-sharing water storage and volume measurement. By controlling the diversion and discharge of the water flow, the total flow of the ditch is indirectly calculated. The water inlet channel 51 serves as the water flow channel between the water collecting channel and the water storage tanks 53. Through the switching function of the first valve 52, the water flow in the water collecting 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 inlet 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 full, closes the first valve 52 to supply water to this branch channel, and at the same time 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 discharged 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.

[0052] 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 measuring mechanism.

[0053] In addition, the programmable logic controller collects the water level data of the first water level detector 56 and the second water level detector, as well as the cross-sectional area of the water flow in the water collecting 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. 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) are input 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 collecting 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.

[0054] The calculation of the total flow of the ditch is based on the following steps: First, through the known volume and water storage time of the water storage tank 53, calculate the water flow rate flowing into the water storage tank 53 per unit time, that is, the water flow rate of the water collecting channel; then, combined with the ratio of the width of the water collecting channel to the total width of the ditch (determined by the position of the baffle 2), deduce the total flow of the ditch. This alternating operation mode of the double water storage tanks ensures the continuity of measurement and avoids the interruption problem in single-tank measurement. The coordinated control of the first valve 52 and the second valve 55, as well as the accurate monitoring of the first water level detector 56, constitute a closed-loop system that can adapt to the changes in the water flow in the water collecting channel in real time and provide stable measurement data. It should be noted that: when the water collecting 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.

[0055] The specific calculation process is as follows:

[0056] Calculate the water flow rate of the water collecting channel :

[0057]

[0058] 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 water storage tanks 53, and the water storage time is the water storage time of the multiple water storage tanks 53;

[0059] Calculate the ratio of the width of the water collecting channel to the total width of the ditch:

[0060]

[0061] Among them, is the width of the water collecting channel , is the total width of the ditch , the width of the waterway is measured by a binocular stereo vision camera, and the total width of the ditch is known;

[0062] The total flow of the ditch :

[0063]

[0064] wherein, the unit is .

[0065] The above are only the preferred embodiments of the present invention, which are 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 measurement device adapted to different flow conditions in ditches, characterized in that, Including: 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. The rubber isolation cloth is laid along the side surfaces of the partition net and the partition board in the water collection channel and extends to the drainage channel side of the partition board; the driving component 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. A fixing mechanism for locking the partition board. The fixing mechanism includes a cross board fixed on the ditch bank and spanning 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 closes in the rectangular through hole, the locking member is pressed against the cross board to lock the partition board; 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 resisting block is fixed at the upper end of the sliding rod. Inclined surfaces are respectively opened on both sides of the upper end of the turning plate. A spring is sleeved on the outer side of the sliding rod, and the lower end of the sliding rod is a hemispherical part; a plurality of anti-slip protrusions are respectively arranged on the lower side of the cross board and the upper side of the resisting block, and the anti-slip protrusions at the upper and lower positions are engaged with each other. A water flow measurement mechanism, which is arranged on one side of the ditch and communicated with the water collection channel, and calculates the total flow of the ditch based on the water flow rate flowing into the water collection channel. A controller, which 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 type measuring device adapted to different flow conditions of the ditch according to claim 1, characterized in that, The water flow measurement mechanism includes a water diversion channel communicated with the water collection channel. The water diversion channel is respectively communicated with two water storage pools through two branch channels. A first valve is arranged in the water diversion channel to control the water flow direction. Both of the two water storage pools 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 pools.

3. The runoff bypass measurement device adapted to different flow conditions of the ditch according to claim 1, characterized in that, A light axis fixed on the ditch banks on both sides is arranged above the ditch. A sliding sleeve fixed on the partition board is slidably arranged on the light axis to enable the partition board to slide along the width direction of the ditch.

4. The runoff bypass type measuring device adapted to different flow conditions of the ditch according to claim 1, characterized in that, A light float is slidably arranged on the side surface of the partition board on the 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 with the light float.

5. The runoff bypass type measuring device adapted to different flow conditions of the ditch according to claim 1, characterized in that, A human-shaped block is fixed at one end of the partition board along the water flow direction of the ditch.

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