An irrigation scheduling system for a canal system

Abstract

This invention discloses an irrigation scheduling system for irrigation canal systems, comprising: multiple remotely controlled gates, multiple flow meters, multiple water level gauges, and a cloud-based processing and control subsystem. Each canal has a remotely controlled gate at its inlet; the flow meters are located downstream of the remotely controlled gates; a water level gauge is installed at both the head and tail of each canal; the cloud-based processing and control subsystem sends gate adjustment commands to the remotely controlled gates based on the instantaneous flow rate detected by the flow meters. This invention detects water flow in the canals using flow meters and water level gauges and transmits the data wirelessly to the cloud-based processing and control subsystem. This allows for real-time acquisition of irrigation data for the canal system and automatic control of the gate openings, improving the automation level of irrigation canal system water management. This significantly reduces the difficulty of water resource scheduling in irrigation areas, saves labor, improves the efficiency of water resource scheduling, and further enhances irrigation area management efficiency.

Description

Technical Field

[0001] This invention belongs to the field of irrigation automation technology, specifically relating to an irrigation scheduling system for irrigation district canal systems. Background Technology

[0002] Modern agriculture advocates unified management of large-scale farmland to improve crop cultivation efficiency. Irrigation is indispensable for crop growth. Traditional irrigation relies on manual gate operation and monitoring to transport water resources from the source to the entire irrigation area via main canals. During canal water resource scheduling, limitations imposed by upstream supply capacity and downstream irrigation demand necessitate advance planning and implementation. This results in extensive human communication and a lack of real-time efficiency, leading to low automation. Furthermore, the traditional scheduling method, due to the lag in implementation compared to information reporting, struggles to handle special or unexpected events related to water use in the irrigation canal system. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this invention provides an irrigation scheduling system for irrigation canal systems. The technical problem to be solved by this invention is achieved through the following technical solution:

[0004] An irrigation scheduling system for an irrigation district canal system includes: multiple remotely controlled gates, multiple flow meters, multiple water level gauges, and a cloud-based processing and control subsystem;

[0005] Each channel entrance is equipped with one of the aforementioned remotely controlled gates;

[0006] The flow meter is installed on the channel and located downstream of the remotely controlled gate;

[0007] One water level gauge is installed at the head and tail of each channel;

[0008] The cloud-based processing and control subsystem is wirelessly connected to the remotely controlled gate, the flow meter, and the water level gauge, and is used to send gate adjustment commands to the remotely controlled gate based on the current instantaneous flow rate detected by the flow meter and the water level monitoring data from the water level gauge.

[0009] In one embodiment of the present invention, the remotely controlled gate includes: a first solar power supply component, a drive component, a gate device, a gate controller, a gate opening sensor, and a first wireless communication device;

[0010] The first solar power supply component, the drive component, the gate controller, the gate opening sensor, and the first wireless communication device are mounted on the gate device;

[0011] The drive assembly is used to drive the gate of the gate device to rise or fall;

[0012] The gate controller is electrically connected to the first solar power supply component, the drive component, the gate opening sensor, and the first wireless communication device.

[0013] The first wireless communication device is wirelessly connected to the cloud processing and control subsystem.

[0014] In one embodiment of the present invention, the flow meter includes a mounting base, a second solar power supply component, an ultrasonic probe, an electronic water level gauge, a second wireless communication device, and a flow controller;

[0015] The second solar power supply component, the ultrasonic probe, the electronic water level gauge, the second wireless communication device, and the flow controller are all mounted on the mounting base;

[0016] The flow controller is electrically connected to the second solar power supply component, the ultrasonic probe, the electronic water level gauge, and the second wireless communication device.

[0017] The second wireless communication device is wirelessly connected to the cloud processing and control subsystem.

[0018] In one embodiment of the present invention, the water level gauge includes: a third solar power supply component, a water level measuring component, a water level controller, and a third wireless communication device;

[0019] The third solar power supply component, the water level controller, and the third wireless communication device are mounted on the water level measurement component;

[0020] The water level controller is electrically connected to the third solar power supply component, the water level measurement component, and the third wireless communication device;

[0021] The third wireless communication device is wirelessly connected to the cloud processing and control subsystem.

[0022] In one embodiment of the present invention, the cloud processing control subsystem includes: a cloud server and a cloud processing control module;

[0023] The cloud processing control module is located on the cloud server;

[0024] The cloud server is wirelessly connected to the first wireless communication device, the second wireless communication device, and the third wireless communication device.

[0025] The cloud-based processing and control module is used to send gate adjustment commands to the remotely controlled gate based on the current instantaneous flow rate detected by the flow meter and the water level monitoring data of the water level gauge.

[0026] The beneficial effects of this invention are:

[0027] This invention detects water flow in irrigation channels using flow meters and water level gauges, and transmits the data wirelessly to a cloud-based processing and control subsystem. The cloud-based subsystem can then control the opening of remotely controlled gates based on the detected data to ensure that the water flow from the channels into the irrigation area meets the required water volume. Therefore, it can acquire real-time water system data and automatically control the opening of canal gates to meet water demand, improving the automation level of irrigation system water management. This significantly reduces the difficulty of water resource allocation in irrigation areas, saves labor, improves the efficiency of water resource allocation, and further enhances the overall management efficiency of irrigation areas.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] Figure 1 This is an installation diagram of the remotely controlled gate and flow meter provided in an embodiment of the present invention;

[0030] Figure 2 This is an installation diagram of the water level gauge provided in an embodiment of the present invention;

[0031] Figure 3 This is a structural block diagram of the cloud processing control module provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic flowchart of a canal water resource scheduling method based on a remotely controlled gate and a flow measuring device provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic flowchart of a method for measuring water resource loss in a canal system based on a flow measuring device and a water level gauge, provided by an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the installation of the ultrasonic water level gauge at the inlet and outlet positions according to an embodiment of the present invention. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0036] Example 1

[0037] Please see Figure 1 and Figure 2As shown, an irrigation scheduling system for an irrigation district canal system includes: multiple remotely controlled gates 1, multiple flow meters 2, multiple water level gauges 3, and a cloud-based processing and control subsystem. A remotely controlled gate 1 is installed at the inlet of each canal. Flow meters 2 are installed on the canal, and are located downstream of the remotely controlled gate 1. A water level gauge 3 is installed at both the head and tail of each canal. Water level gauges 3 for the same canal are located downstream of the remotely controlled gate 1. The cloud-based processing and control subsystem is wirelessly connected to the remotely controlled gates 1, flow meters 2, and water level gauges 3. The cloud-based processing and control subsystem sends gate adjustment commands to the remotely controlled gates 1 based on the current instantaneous flow rate detected by the flow meters 2 and the water level monitoring data from the water level gauges 3.

[0038] In this embodiment, the flow meter 2 can transmit the detected instantaneous flow data to the cloud processing and control subsystem via wireless data transmission, and the water level meter 3 can transmit the detected water level data to the cloud processing and control subsystem via wireless data transmission. Therefore, the water conservancy data in the channel can be obtained remotely in real time through the cloud processing and control subsystem to facilitate timely monitoring of the water transport situation in the channel. After receiving the flow and water level data, the cloud processing and control subsystem can control the opening degree of the remote automatic gate 1 based on the data. For example, if the current water level is greater than the limit, and the water level in the current channel is high, it is necessary to control the opening degree of the remote automatic gate 1 of the upstream channel to decrease and the opening degree of the remote automatic gate 1 of the downstream channel to increase, so as to lower the water level in the current channel. Of course, the opening degree of the remote automatic gate 1 can also be controlled according to the magnitude of the instantaneous flow. For example, if the current instantaneous flow of a certain channel is compared with its required instantaneous flow, the opening degree of the remote automatic gate 1 of the channel can be controlled according to the comparison result to make the instantaneous flow match the required instantaneous flow.

[0039] The cloud-based processing and control subsystem can also control the opening degree of the remotely controlled gate 1 according to the irrigation district's water demand. For example, when the cloud-based processing and control subsystem receives a water demand command indicating the instantaneous flow rate required by the final channel, and combines this with the current instantaneous flow rate detected by the flow meter 2, it sends a gate opening adjustment command to the remotely controlled gate 1 to decrease or increase the opening degree so that the adjusted instantaneous flow rate of each channel meets the instantaneous flow rate required by the final channel. The cloud-based processing and control subsystem can control the opening degree of the remotely controlled gate 1 based on the detected data to ensure that the water flow from the channel into the irrigation district meets the required water demand, thereby improving the automation level of irrigation district canal system water conservancy scheduling, significantly reducing the difficulty of irrigation district water resource scheduling, saving labor, significantly improving water resource supply efficiency, improving irrigation district water resource scheduling efficiency, and further improving irrigation district management efficiency.

[0040] Furthermore, the remotely controlled gate 1 includes: a first solar power supply component, a drive component, a gate device, a gate controller, a gate opening sensor, and a first wireless communication device. The first solar power supply component, drive component, gate controller, gate opening sensor, and first wireless communication device are mounted on the gate device. The drive component drives the gate of the gate device to rise or fall. When the gate rises, the opening degree increases; when the gate falls, the opening degree decreases. The gate controller is electrically connected to the first solar power supply component, drive component, gate opening sensor, and first wireless communication device. The first wireless communication device is wirelessly connected to a cloud-based processing and control subsystem.

[0041] In this embodiment, power is supplied by solar energy, saving energy. The gate controller transmits data commands to the cloud processing and control subsystem via a first wireless communication device. The gate controller can send the received commands from the cloud processing and control subsystem to the drive component to control the drive component's operation, and the drive component drives the gate to move up or down.

[0042] Furthermore, the flow meter 2 includes a mounting base, a second solar power supply component, an ultrasonic probe, an electronic water level gauge, a second wireless communication device, and a flow controller. The second solar power supply component, ultrasonic probe, electronic water level gauge, second wireless communication device, and flow controller are all mounted on the mounting base. The mounting base is installed on the channel. The flow controller is electrically connected to the second solar power supply component, ultrasonic probe, electronic water level gauge, and second wireless communication device. The second wireless communication device is wirelessly connected to the cloud processing and control subsystem.

[0043] In this embodiment, the flow meter 2 is powered by solar energy, saving energy. The flow controller transmits data to the cloud processing and control subsystem via a second wireless communication device. After processing the signal from the ultrasonic probe, the flow controller obtains the instantaneous flow value and transmits it to the cloud processing and control subsystem via the second wireless communication device. The flow meter 2 is located near the inlet of the channel.

[0044] Furthermore, the water level gauge 3 includes: a third solar power supply component, a water level measuring component, a water level controller, and a third wireless communication device. The third solar power supply component, the water level controller, and the third wireless communication device are mounted on the water level measuring component. The water level controller is electrically connected to the third solar power supply component, the water level measuring component, and the third wireless communication device. The third wireless communication device is wirelessly connected to the cloud processing control subsystem.

[0045] In this embodiment, the water level gauge 3 is powered by solar energy, saving energy. The water level controller transmits data to the cloud processing and control subsystem via a third wireless communication device. After processing the signal from the water level measuring component, the water level controller obtains the water level value and transmits it to the cloud processing and control subsystem via the third wireless communication device.

[0046] Among them, the water level gauge 3 can be an ultrasonic water level gauge 3 or a radar water level gauge 3.

[0047] Furthermore, the cloud-based processing and control subsystem includes a cloud server and a cloud-based processing and control module. The cloud-based processing and control module is located within the cloud server. The cloud server is wirelessly connected to the first wireless communication device, the second wireless communication device, and the third wireless communication device. The cloud-based processing and control module is used to send gate adjustment commands to the remotely controlled gate 1 based on the current instantaneous flow rate detected by the flow meter 2 and the water level monitoring data from the water level gauge 3.

[0048] Furthermore, such as Figure 3 As shown, the cloud processing control module includes:

[0049] The first acquisition unit 41 is used to acquire the water diversion demand of the irrigation system in the area to be irrigated.

[0050] The water diversion requirements of the canal system include irrigation areas, the area of ​​the irrigation areas, the instantaneous irrigation flow rate of the irrigation areas, and the irrigation duration; there are multiple levels of canals from the last level canal of the irrigation area to the water intake of the canal system, and each level of canal is equipped with a remotely controlled gate and a flow meter at the entrance, and each canal is equipped with a water level gauge at both ends;

[0051] The regulating unit 42 is used to adjust the remotely controlled gates in sequence according to the water diversion requirements of the canal system and the water distribution hierarchy from the water intake to the final channel to meet the water diversion requirements of the canal system, so that the instantaneous flow of water from the outlet through the final channel meets the instantaneous irrigation flow corresponding to the irrigation area in the water diversion requirements of the canal system, and irrigates the irrigation area.

[0052] The second acquisition unit 43 is used to acquire the water level detected by the water level gauge and the instantaneous flow rate detected by the flow meter of each channel during the irrigation process of the area to be irrigated.

[0053] The determination unit 44 is used to determine whether there is a risk of flow exceeding the limit in each section of the water conveyance path if a new water transfer request is received during the irrigation of the irrigation area. If a new water transfer request is received during the irrigation of the irrigation area, the instantaneous flow detected by the flow meter of the current irrigation channel is added to the instantaneous irrigation flow carried in the new water transfer request for each channel. If a new water transfer request is received, the new water transfer request is not responded to temporarily and is stored in the queue.

[0054] The response unit 45 is used to read the queued water transfer demand if the irrigation duration of the irrigation area reaches the limit or the water transfer demand of the irrigation area changes to terminate irrigation. The response unit reads the water transfer demand of the irrigation area and reads the order of the water transfer demand of the irrigation area. The remote automatic control gate from the water intake of the irrigation system to the terminal channel is adjusted according to the read water transfer demand of the irrigation system to meet the instantaneous irrigation flow in the water transfer demand of the irrigation system and complete the irrigation.

[0055] Furthermore, the adjustment unit includes:

[0056] The first regulating subunit is used to open the remotely controlled gate of each channel according to the water diversion demand of the irrigation area and the order of water distribution from the water intake to the last channel, and to adjust the opening degree of the remotely controlled gate.

[0057] The second regulating subunit is used to continuously adjust the opening of the automatic gate until the instantaneous flow of water reaches the final channel, so as to meet the instantaneous irrigation flow corresponding to the irrigation area in the water diversion demand of the canal system.

[0058] The holding sub-unit is used to maintain the current state of each automatic gate and irrigate the area to be irrigated.

[0059] Further, the determining unit includes:

[0060] The first calculation subunit is used to add the instantaneous flow rate detected by the flow meter of each channel used in the irrigation area to the instantaneous irrigation flow rate carried in the new canal water transfer demand if a new canal water transfer demand is received during the irrigation process in the irrigation area, so as to obtain the instantaneous flow rate addition result.

[0061] The first judgment subunit determines that if the sum of instantaneous traffic exceeds the channel's instantaneous traffic limit, the channel is at risk of overflow.

[0062] The second judgment subunit, if there is a risk of overflow in a canal during the irrigation process in the irrigated area, will not respond to the new canal system water transfer request and will store the new canal system water transfer request in the queue.

[0063] Furthermore, such as Figure 3 As shown, the cloud processing control module further includes:

[0064] The third acquisition unit 46 is used to acquire information on channels at all levels in the irrigation area; the information on channels at all levels includes the inlet and outlet locations of each channel, the connection status between upper and lower level channels, and the dimensions of each channel.

[0065] The receiving unit 47 is used to determine the channel to be monitored and calculated in the irrigation area, and to receive the inlet flow rate uploaded by the flow meter installed at the inlet position of the channel to be monitored and calculated, the inlet water level uploaded by the first ultrasonic water level meter installed at the inlet position, the outlet water level uploaded by the second ultrasonic water level meter installed at the outlet position, and the outlet flow rate uploaded by the flow meter installed in the downstream channel of the channel to be monitored and calculated.

[0066] The first calculation unit 48 is used to determine the inlet water body cross-sectional area corresponding to the inlet water level and the outlet water body cross-sectional area corresponding to the outlet water level based on the stored correspondence between water level and water body cross-section.

[0067] The second calculation unit 49 is used to calculate the cumulative inflow of the channel to be monitored and measured within a preset time period based on the inflow flow, and to calculate the cumulative outflow of the channel to be monitored and measured within a preset time period based on the outflow flow.

[0068] The third calculation unit 50 is used to calculate the change in water storage in the channel to be monitored at the last moment within a preset time period, based on the inlet water level, outlet water level, inlet water cross-sectional area, and channel size.

[0069] The fourth calculation unit 51 is used to calculate the water resource loss of the channel under monitoring and measurement during a preset time period based on the cumulative inflow, cumulative outflow and water storage change of the channel under monitoring and measurement.

[0070] Furthermore, the second computing unit includes:

[0071] The second calculation subunit is used to accumulate the inbound traffic within the preset time period, starting from the beginning time and ending at the end time of the preset time period, to obtain the cumulative inbound traffic.

[0072] The third calculation subunit is used to accumulate the outflow within the preset time period, starting from the beginning of the preset time period and ending at the end of the preset time period, to obtain the cumulative outflow.

[0073] The third computing unit includes:

[0074] The fourth calculation subunit is used to calculate the water storage volume at the initial moment based on the cross-sectional area of ​​the inlet water body, the cross-sectional area of ​​the outlet water body, and the length of the channel to be monitored and calculated at the initial moment of the preset time period, using the trapezoidal volume calculation formula.

[0075] The fifth calculation subunit is used to calculate the water storage volume at the last moment based on the cross-sectional area of ​​the inlet water body, the cross-sectional area of ​​the outlet water body, and the length of the channel to be monitored and calculated at the last moment of the preset time period, using the trapezoidal volume calculation formula.

[0076] The sub-unit is determined by subtracting the water storage volume at the initial moment from the water storage volume at the last moment, thereby determining the change in water storage volume in the channel to be monitored and measured within a preset time period.

[0077] Example 2

[0078] like Figure 4 As shown, a second aspect of this invention also provides a canal water resource scheduling method based on a remotely controlled gate and a flow measurement device, applied to a cloud platform. The canal water resource scheduling method includes:

[0079] Step 1: Obtain the water diversion requirements of the irrigation system in the area to be irrigated;

[0080] The water diversion requirements of the canal system include irrigation areas, the area of ​​the irrigation areas, the instantaneous irrigation flow rate of the irrigation areas, and the irrigation duration; there are multiple levels of canals from the last level canal of the irrigation area to the water intake of the canal system, and each level of canal is equipped with a remotely controlled gate and a flow meter at the entrance, and each canal is equipped with a water level gauge at both ends;

[0081] It's worth noting that different irrigation areas have different irrigated areas and therefore different water flow requirements. Consequently, the instantaneous flow rate of the terminal irrigation canals will vary within the irrigation period, but it will not exceed the upper limit of the instantaneous flow rate of the terminal canals, nor will the water level exceed the irrigation water level. Different canal system water transfer requests will have different identifiers to distinguish irrigation areas. Thus, by analyzing the canal system water transfer request as it is sent, it becomes possible to determine which specific terminal canal to open the automatic gate from.

[0082] It is worth noting that before the measurement is performed, the cloud platform used in this invention needs to establish communication with the field system equipment to ensure the feasibility of the measurement. The process is as follows:

[0083] Establish communication with remotely controlled gates and flow meters installed in irrigation channels at all levels within the irrigation area.

[0084] refer to Figure 1 as well as Figure 2 Before communication with the cloud platform, remote self-controlled gates 1 and flow meters 2 need to be installed at the entrances of each level of the canal system. Water level gauges 3 are installed at the beginning and end of the main and branch channels. All devices in the canal system are connected to the cloud platform management software (cloud processing and control module) to uniformly upload information to the cloud processing and control module and uniformly receive cloud platform instructions.

[0085] Step 2: Based on the water diversion requirements of the canal system, and according to the order of water distribution levels from the canal intake to the final channel, adjust the remotely controlled gates in sequence to meet the water diversion requirements of the canal system, so that the instantaneous flow of water from the outlet through the final channel meets the instantaneous irrigation flow corresponding to the irrigation area in the water diversion requirements of the canal system, and irrigate the irrigation area.

[0086] When irrigation is initiated in an irrigation area, the different irrigation areas have different water diversion needs and different terminal channels. The sequence of water flow from the outlet to the terminal channel may also differ. Therefore, it is necessary to open some gates and close others to form a water conveyance path from the outlet to the terminal channel. During irrigation along this path, to meet the required water flow rate, the opening degree of the remotely controlled gates needs to be adjusted. Adjusting the opening of the remotely controlled gates and the water conveyance process is specifically described in step 2. Step 2:

[0087] Step a: Based on the water diversion demand of the irrigation area, open the remote automatic control gate of each channel according to the channel water transmission and distribution hierarchy from the water intake to the last channel, and adjust the opening degree of the remote automatic control gate.

[0088] Step b: Continuously adjust the opening of the automatic gate until the water flow reaches the instantaneous flow rate of the final channel, so as to meet the instantaneous irrigation flow rate corresponding to the irrigation area in the water diversion demand of the canal system;

[0089] Step c: Maintain the current state of each automatic gate and irrigate the area to be irrigated.

[0090] Step 3: Obtain the water level detected by the water level gauge and the instantaneous flow rate detected by the flow meter in each channel during the irrigation process of the area to be irrigated;

[0091] Step 4: If a new canal system water transfer request is received during the irrigation of the irrigation area, for each level of the current irrigation canal, the instantaneous flow rate detected by the flow meter of that canal is added to the instantaneous irrigation flow rate carried in the new canal system water transfer request, so as to determine whether there is a risk of flow exceeding the limit in each section of the water conveyance path. If there is, the new canal system water transfer request will not be responded to for the time being, and the new canal system water transfer request will be stored in the queue.

[0092] Specifically, the upper limit of the water level in the canal at the end of winter irrigation is lower than the upper limit of the water level at the end of summer irrigation, so as to ensure that the water level in the canal is lower than that in summer during winter irrigation and effectively avoid the freezing and swelling of the canal.

[0093] It is understandable that when the irrigation district carries out its last winter irrigation, the cumulative upper limit of winter irrigation water statistics from the cloud platform will be used as the control line. At the end of the winter irrigation period, the flow rate in the canals will be automatically reduced, and the water level in the canals will be lowered in conjunction with the water level gauge measurement value. This will make full use of the water stored in the canals and ensure that the water level in the canals is low and the water storage is low during the winter, effectively avoiding damage from freezing and swelling of the canals.

[0094] In the irrigation process, there may be new water diversion needs from the canal system. Therefore, it is necessary to predict whether the current irrigation process will cause the risk of overflowing if the new water diversion needs are met. Step 4 includes:

[0095] Step a: If a new water transfer request for the irrigation system is received during the irrigation process in the irrigation area, the instantaneous flow rate detected by the flow meter of each channel used in the irrigation area is added to the instantaneous irrigation flow rate carried in the new water transfer request to obtain the instantaneous flow rate sum.

[0096] Step b: If the sum of instantaneous traffic exceeds the channel's instantaneous traffic limit, the channel is deemed to have a risk of overflowing.

[0097] Step c: If there is a risk of overflow in a canal during the irrigation process in the irrigated area, then do not respond to the new canal system water transfer request, and store the new canal system water transfer request in the queue.

[0098] It is worth noting that if the water level is too high, it indicates that the channel may also be at risk of overflowing.

[0099] It is worth noting that the water diversion demand in the canal system is generated by irrigation users requesting water on the cloud platform. Specifically, when there is a water demand at the terminal canal, the system cloud platform issues an instruction to open the gate of the terminal canal's headgate to release water. The corresponding upstream canals then upload demand data, accumulating the required flow rate, and adjusting the gate opening at each level to release water downstream. If any canal has a risk of overflowing, new water diversion requests will not be responded to to prevent overflowing.

[0100] In this invention, during the irrigation process, once irrigation is initiated in an area to be irrigated, it is designated as an irrigated area. If the instantaneous flow rate of the terminal channel in the irrigated area is zero, it is determined that irrigation in that area has ceased, and the water diversion demand for the irrigation system in that area is changed to terminated irrigation. This saves time in responding to subsequent new water diversion demands. If the current water diversion demand is terminated, new water diversion demands are responded to directly.

[0101] It is worth noting that when irrigating an area, the system checks the instantaneous flow changes of its terminal channels. If the flow at a terminal gate during irrigation becomes 0, the system determines that irrigation has stopped at that point, the flow demand has ended, and the corresponding instantaneous flow demand can be used by the area to be irrigated.

[0102] Step 5: If the irrigation duration of the irrigation area is reached or the water transfer demand of the irrigation area is changed to terminate irrigation, the water transfer demand of the canal system that is ranked first in the queue is read and responded to. The remote automatic control gate from the water intake of the canal system to the last channel is adjusted according to the read water transfer demand to meet the instantaneous irrigation flow in the water transfer demand of the canal system and complete the irrigation.

[0103] It is worth noting that: Reference Figure 1 The water level in the canal is measured by water level gauges 3 installed at the head and tail of the canal. When the water level in the canal is too high and there is a risk of overflow and water spillage at the tail of the canal, the flow rate in the corresponding section of the canal cannot be increased further, and any new water diversion demand in the canal system will be suspended until other flow demands in the same section of the canal cease. The water level gauges can be ultrasonic water level gauges or radar water level gauges.

[0104] It is worth noting that if the irrigation duration is reached or the current water diversion demand of the canal system is terminated, a response to the new water diversion demand of the canal system can be initiated. The process of adjusting the remotely controlled gates and the terminal channels will be executed accordingly to irrigate the new area to be irrigated.

[0105] This invention provides a method for regulating canal water resources based on remotely controlled gates and flow measurement devices. The method acquires the water demand of the canal system in the area to be irrigated; according to the canal water distribution hierarchy from the intake to the final channel, it sequentially adjusts the remotely controlled gates to meet the water demand and irrigate the area; based on newly added canal water demand, it determines whether there is a risk of overflow in each canal section. If so, the response to the newly added canal water demand is delayed, and the demand is stored in a queue and triggered sequentially according to seasonal conditions; if the irrigation duration is reached or the canal water demand changes to terminate irrigation, the highest-order canal water demand in the queue is read and responded to. Therefore, this invention can dynamically implement water resource scheduling in real time according to irrigation demand and the water conveyance capacity of each canal section, avoiding water waste caused by overflow. It can also achieve different water levels and instantaneous flow limits according to different seasons, reducing the possibility of canal damage. It has high practicality for agricultural irrigation, and its low cost makes it easy to implement and promote.

[0106] Example 3

[0107] like Figure 5 As shown, a third aspect of the present invention also provides a method for measuring water resource loss in canal systems based on a flow measuring device and a water level gauge.

[0108] During irrigation, the inventors discovered through repeated research that clearly defining the water resource loss of a specific canal section within a certain time period reveals the canal's leakage status, providing a decision-making reference for whether to lining or repair the masonry. Calculating water resource loss in a canal section using new technologies is crucial in irrigation district management. Determining irrigation district canal system maintenance plans based on the leakage measurement results makes the calculation of canal water resource loss extremely important.

[0109] like Figure 5 As shown, the present invention also provides a method for measuring water resource loss in canal systems based on a flow measuring device and a water level gauge, which is applied to a cloud-based processing and control module. The method for measuring water resource loss in canal systems includes:

[0110] Step 31: Obtain information on canals at all levels within the irrigation area;

[0111] The information for each level of channel includes the entry and exit points of each channel, the connection status between higher and lower level channels, and the dimensions of each level of channel.

[0112] It is worth noting that before the measurement is performed, the cloud processing control module used in this invention needs to establish communication with the field system equipment in order to ensure the feasibility of the measurement. The process is as follows: establish communication with the water level gauges and flow meters 1 installed in the irrigation area at all levels of the canals.

[0113] Step 32: Determine the channel to be monitored and calculated in the irrigation area, and receive the inlet flow rate uploaded by the flow meter 1 installed at the inlet position of the channel to be monitored and calculated, the inlet water level uploaded by the first ultrasonic water level meter installed at the inlet position, the outlet water level uploaded by the second ultrasonic water level meter installed at the outlet position, and the outlet flow rate uploaded by the flow meter 1 installed in the downstream channel of the channel to be monitored and calculated.

[0114] refer to Figure 1 , Figure 1 The diagram illustrates the various levels of irrigation channels and the location of flow meter 1 within the channels. An irrigation area consists of multiple levels of channels, which are interconnected. Flow meter 1, installed at the inlet of its current channel level, measures the inlet flow of that channel and also the outlet flow of the next higher channel level. In this way, the cloud-based processing and control module can obtain the inlet and outlet flow of each channel level.

[0115] refer to Figure 2 , Figure 2 This is a schematic diagram of the installation of an ultrasonic water level gauge. An ultrasonic water level gauge determines the water level by emitting ultrasonic waves, which are reflected from the water surface.

[0116] Step 33: Based on the correspondence between the stored water level and the water body cross-section, determine the inlet water body cross-sectional area corresponding to the inlet water level and the outlet water body cross-sectional area corresponding to the outlet water level.

[0117] The steps of this invention can pre-store the correspondence between water level and water body cross section. Before storing the correspondence, it is necessary to calculate the water level and calculate the cross section to establish the correspondence. The process is as follows:

[0118] Step a: Calculate the cross-sectional area of ​​the inlet water body based on the inlet channel size of the channel to be monitored and the inlet water level at the last moment of the preset time period;

[0119] Step b: Calculate the cross-sectional area of ​​the outlet water body based on the outlet channel size of the channel to be monitored and the outlet water level at the last moment of the preset time period;

[0120] Step c: Establish and store the correspondence between the inlet water level and the cross-sectional area of ​​the water body, as well as the correspondence between the outlet water level and the cross-sectional area of ​​the water body.

[0121] Step 34: Calculate the cumulative inbound traffic of the channel to be monitored within the preset time period based on the inbound traffic, and calculate the cumulative outbound traffic of the channel to be monitored within the preset time period based on the outbound traffic;

[0122] refer to Figure 6 , Figure 6 This is a schematic diagram showing the installation of the ultrasonic water level gauge at the inlet and outlet positions in the channel to be monitored and calculated in this invention. Figure 6 In the channel to be monitored and measured, ultrasonic water level gauges 3.1 and 3.2 need to be installed upstream and downstream.

[0123] It is worth noting that the water flow in the monitored channel is continuous during irrigation. If losses need to be calculated, the cumulative inlet and outlet flow rates must be recorded. To calculate losses over a period of time, the inlet flow rate measured by inlet flowmeter 1 during that period must be accumulated, and the same applies to the outlet flow rate. The calculation process is as follows:

[0124] Step a: Starting from the beginning of a preset time period and ending at the end of the preset time period, accumulate the inbound traffic within the preset time period to obtain the cumulative inbound traffic;

[0125] Step b: Starting from the beginning of the preset time period and ending at the end of the preset time period, accumulate the outbound flow within the preset time period to obtain the cumulative outbound flow.

[0126] Step 35: Based on the inlet water level, outlet water level, inlet water cross-sectional area, and channel dimensions of the channel to be monitored, calculate the change in water storage in the channel at the last moment within the preset time period.

[0127] It is worth noting that the change in water storage over the preset time period needs to be calculated based on the water storage levels at the initial and final moments. The process for obtaining the change in water storage is as follows:

[0128] Step a: Based on the cross-sectional area of ​​the inlet water body, the cross-sectional area of ​​the outlet water body, and the length of the channel to be monitored at the beginning of the preset time period, calculate the water storage volume at the beginning of the time period using the trapezoidal volume calculation formula.

[0129] Step b: Based on the cross-sectional area of ​​the inlet water body, the cross-sectional area of ​​the outlet water body, and the length of the channel to be monitored at the last moment of the preset time period, use the trapezoidal volume calculation formula to calculate the water storage volume at the last moment.

[0130] Step c: Divide the water storage volume at the initial moment by the water storage volume at the last moment to determine the change in water storage volume in the channel to be monitored and measured within the preset time period.

[0131] Step 36: Based on the cumulative inflow, cumulative outflow, and water storage change of the channel to be monitored, calculate the water resource loss of the channel to be monitored over a preset time period.

[0132] It is worth noting that: over a period of time, the cumulative traffic Q at the channel entry point... 进 Deduct the corresponding cumulative flow rate Q at the outlet. 出 The change ΔQ is obtained. Within a certain period, the inlet water cross-sectional area S1 and the outlet water cross-sectional area S2 at the beginning of the period, and the inlet water cross-sectional area S1 and the outlet water cross-sectional area S2 at the end of the period are obtained. Combined with the channel length L, the change in channel water storage ΔV is obtained. ΔQ-ΔV is the water loss of this channel section within a certain period.

[0133] refer to Figure 6 It is necessary to embed the corresponding function relationship f1 between the inlet water level h1 and the inlet water body section S1 at the location of the channel into the cloud processing and control module. Subsequently, the cloud processing and control module calculates the corresponding water body section area based on the water level uploaded by the point. The same applies to the debugging and setting of the water level gauge at point 3.2.

[0134] It's worth noting that the dimensions of each level of the channel are known; that is, the length of the trapezoid or matrix is ​​known. Therefore, knowing the water level means knowing the height of the trapezoid or rectangle. This allows us to determine the cross-sectional area of ​​the water body and establish a correspondence between the water level and the cross-sectional area of ​​the water body.

[0135] It is worth noting that the present invention calculates the water resource loss during the preset time period by subtracting the channel storage volume at the last moment of the preset time period from the difference between the cumulative inflow and cumulative outflow within the preset time period.

[0136] It is understood that, after determining the water resource loss in the canal system, this invention can calculate the water resource loss rate within a preset time period. Maintenance is then performed on the canal to be monitored based on the water resource loss rate. The process is as follows:

[0137] The water resource loss rate is determined by the ratio of the water resource loss in the channel to be monitored and measured during a preset time period to the cumulative inflow during that preset time period.

[0138] Based on the magnitude of resource loss rate, determine whether lining is necessary and the methods for repairing the lining.

[0139] It is worth noting that maintenance personnel can use the resource loss rate to determine the severity of water resource depletion in the channel, providing a basis for engineering maintenance decisions. This allows them to decide whether and how to line the channel.

[0140] This invention provides a method for measuring water resource loss in canal systems based on a flow measuring device and a water level gauge. The method involves acquiring information on canals at various levels within an irrigation area; identifying the canal to be monitored within the irrigation area and receiving inlet flow rate, outlet flow rate, inlet water level, and outlet water level; determining the inlet water body cross-sectional area corresponding to the inlet water level and the outlet water body cross-sectional area corresponding to the outlet water level; calculating the cumulative inlet flow rate and cumulative outlet flow rate; and then, combined with the canal dimensions, calculating the change in water storage within the monitored canal over a preset time period; finally, calculating the water resource loss over the preset time period based on the cumulative inlet flow rate, cumulative outlet flow rate, and water storage change. Therefore, this invention can accurately and automatically measure water resource loss, is highly feasible and easy to promote, and saves time and effort. It provides an effective basis for timely maintenance of irrigation canals, helps conserve water resources, and avoids water waste.

[0141] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0142] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0143] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0144] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0145] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0146] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An irrigation scheduling system for an irrigation district canal system, characterized in that, The application relates to a remote automatic control gate system for a water distribution network. The system comprises a plurality of remote automatic control gates, a plurality of flow meters, a plurality of water level meters and a cloud processing control subsystem. Each channel inlet is provided with a remote automatic control gate. The flow meters are arranged on the channels and located downstream of the remote automatic control gates. Each channel head and tail position is provided with a water level meter. The cloud processing control subsystem is wirelessly connected with the remote automatic control gates, the flow meters and the water level meters, and is used for sending gate adjustment instructions to the remote automatic control gates according to current instantaneous flow detected by the flow meters and water level monitoring data of the water level meters. The cloud processing control subsystem comprises a cloud processing control module and a cloud server, and the cloud processing control module is arranged in the cloud server. The first acquisition unit is used for acquiring channel system water demand of a to-be-irrigated area. The adjustment unit is used for adjusting the remote automatic control gates to meet the channel system water demand according to a channel water distribution level sequence from a channel water intake to a terminal channel, so that water flows through the terminal channel until the instantaneous flow of the terminal channel meets the irrigation instantaneous flow corresponding to the channel system water demand in the channel system water demand, and the to-be-irrigated area is irrigated. The second acquisition unit is used for acquiring water levels detected by water level meters of each channel in the process of irrigating the to-be-irrigated area and instantaneous flow detected by flow meters. The determination unit is used for adding the instantaneous flow detected by the flow meter of each channel currently irrigated to the irrigation instantaneous flow carried in the new channel system water demand, so as to determine whether there is a flow overrun risk in each channel segment on the water delivery path, and if there is, the new channel system water demand is not responded to, and the new channel system water demand is stored in a queue. The response unit is used for reading the channel system water demand in front of the queue to respond to the channel system water demand, adjusting the remote automatic control gates from the channel water intake to the terminal channel according to the read channel system water demand, meeting the irrigation instantaneous flow in the channel system water demand, and completing irrigation.

2. The irrigation scheduling system for a canal system of a district according to claim 1, wherein The remote automatic control gate comprises a first solar power supply assembly, a driving assembly, a gate device, a gate controller, a gate opening sensor and a first wireless communication device. The first solar power supply assembly, the driving assembly, the gate controller, the gate opening sensor and the first wireless communication device are arranged on the gate device. The driving assembly is used for driving the gate of the gate device to rise or fall. The gate controller is electrically connected with the first solar power supply assembly, the driving assembly, the gate opening sensor and the first wireless communication device. The first wireless communication device is wirelessly connected with the cloud processing control subsystem.

3. The irrigation scheduling system for a canal system of a district according to claim 2, wherein The flow meter comprises a mounting base, a second solar power supply component, an ultrasonic probe, an electronic water gauge, a second wireless communication device and a flow controller; The second solar power supply component, the ultrasonic probe, the electronic water gauge, the second wireless communication device and the flow controller are arranged on the mounting base; The flow controller is electrically connected with the second solar power supply component, the ultrasonic probe, the electronic water gauge and the second wireless communication device; The second wireless communication device is wirelessly connected with the cloud processing control subsystem.

4. The irrigation scheduling system for a canal system of a district according to claim 3, wherein The water level meter comprises a third solar power supply component, a water level measuring component, a water level controller and a third wireless communication device; The third solar power supply component, the water level controller and the third wireless communication device are arranged on the water level measuring component; The water level controller is electrically connected with the third solar power supply component, the water level measuring component and the third wireless communication device; The third wireless communication device is wirelessly connected with the cloud processing control subsystem.

5. The irrigation scheduling system for a canal system of a district as claimed in claim 4 wherein, The cloud server is wirelessly connected with the first wireless communication device, the second wireless communication device and the third wireless communication device; The cloud processing control module is configured to send a gate adjustment instruction to the remote self-control gate according to the current instantaneous flow detected by the flow meter and the water level monitoring data of the water level meter.

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