Flood prevention early warning system of reservoir, measurement method and flood prevention early warning method

Abstract

The embodiment of the invention belongs to the technical field of flood prevention, and particularly relates to a flood prevention early warning system of a reservoir, a measurement method and a flood prevention early warning method. The flood prevention early warning system for the reservoir comprises a wind power detection device which is installed in a related water area at the upstream of a target reservoir and is used for detecting real-time wind speed data and wind direction data of the water area; the water flow detection device is mounted in a related water area at the upstream of the target reservoir, is in communication connection with the wind power detection device in the water area and is used for detecting the real-time water level height of the water area and determining real-time flow velocity data of water flow according to wind speed data and wind direction data detected by the wind power detection device; and the flood prevention early warning device is in communication connection with the water flow detection device and the wind power detection device and is used for performing flood prevention early warning according to the flow velocity data and the water level height detected by the water flow detection device of each water area. Prediction of the water level of the reservoir in a period of time in the future is achieved, and more time is provided for flood prevention preparation in a downstream area.

Description

Technical Field

[0001] The embodiments of the present invention belong to the technical field of flood control, and in particular relate to a reservoir flood control warning system, a measurement method, and a flood control warning method. Background Art

[0002] A reservoir is generally defined as a hydraulic engineering structure that stores water and regulates water flow, and can be used for irrigation, power generation, flood control, and fish farming. It refers to an artificial lake formed by building a dam at the mouth of a ravine or river. Once completed, a reservoir can serve various purposes, including flood control, water storage for irrigation, water supply, power generation, and fish farming. Reservoir management requires constant monitoring of the reservoir's water level. During flood control periods, dedicated personnel are typically assigned to inspect the reservoir's water level and use this information to issue flood warnings. However, this flood control approach doesn't allow downstream areas more time to prepare for flood control, resulting in less effective warnings. Summary of the Invention

[0003] The present invention provides a reservoir flood warning system, comprising: a wind detection device installed in the relevant waters upstream of the target reservoir, for detecting real-time wind speed and wind direction data in the waters; a water flow detection device installed in the relevant waters upstream of the target reservoir, communicating with the wind detection device in the waters, for detecting the real-time water level in the waters, and determining the real-time flow velocity data of the water flow based on the wind speed and wind direction data detected by the wind detection device; and a flood warning device communicating with the water flow detection device and the wind detection device, for issuing flood warnings based on the flow velocity data and water level detected by the water flow detection devices in each water area. The system solves the problem of weak flood prevention effects caused by observing the reservoir water level in the prior art, realizes the prediction of the reservoir water level in the future, and thus can issue flood warnings earlier. It can also better play the role of the reservoir, giving downstream areas more time to prepare for flood prevention.

[0004] To solve the above technical problems, this application proposes four aspects.

[0005] In the first aspect, the present application provides a flood prevention and warning system for a reservoir, comprising: a wind detection device, installed in the relevant waters upstream of the target reservoir, for detecting real-time wind speed data and wind direction data of the waters; a water flow detection device, installed in the relevant waters upstream of the target reservoir, communicatively connected to the wind detection device of the waters, for detecting the real-time water level height of the waters, and determining the real-time flow velocity data of the water flow based on the wind speed data and wind direction data detected by the wind detection device; a flood prevention and warning device, communicatively connected to the water flow detection device and the wind detection device, for performing flood prevention and warning based on the flow velocity data and water level height detected by the water flow detection device of each waters.

[0006] In some embodiments, the water flow detection device includes: a measuring rod, a pressure sensor array, a power generation cabin, a battery, a communication module, a processor and a generator; the power generation cabin is installed on the bottom of the water; the generator is installed in the power generation cabin, electrically connected to the battery, and is used to generate electricity through water flow and charge the battery; the measuring rod is an elastic rod, and one end of the measuring rod is fixedly connected to the top of the power generation cabin; a plurality of measuring electrodes are evenly arranged on the measuring rod, and the measuring electrodes can be conductive after being submerged in water flow, and the measuring electrodes are electrically connected to the processor; the pressure sensor array is installed at the connection between the measuring rod and the power generation cabin, and is electrically connected to the processor, and is used to detect the pressure of the measuring rod when it is subjected to external force. The pressure sensor array generates pressure data and transmits the pressure data to the processor; the battery is installed in the power generation cabin to power the measuring electrodes, the processor and the communication module; the communication module is installed on the top of the measuring rod, and is communicated with the flood prevention and warning device and the wind detection device in the same water area, for transmitting the collected data to the flood prevention and warning device, and receiving the wind data and wind direction data sent by the wind detection device; the processor can collect the total current of the conductive circuit on the measuring rod and the current voltage of the battery, and determine the real-time flow velocity data and water level height of the water flow based on the total current, the current voltage, the pressure data, the wind speed data and the wind direction data.

[0007] In some embodiments, the power generation cabin includes a water inlet and a water outlet, the water inlet is located upstream of the water outlet, and the water inlet is higher than the water outlet.

[0008] In some embodiments, a positive circuit and a negative circuit are provided in the measuring rod, and the positive circuit and the negative circuit are respectively connected to the two poles of the measuring electrode, and a measuring resistor is provided between two adjacent measuring electrodes; the positive circuit and the negative circuit are respectively connected to the positive pole and the negative pole of the battery; a current detection device is provided at the connection between the positive circuit or the negative circuit and the battery; the current detection device is electrically connected to the processor for detecting the total current of the loop formed by the positive circuit and the negative circuit.

[0009] In some embodiments, a voltage detection device is further provided in the battery, and the voltage detection device is electrically connected to the processor for collecting the current voltage of the battery.

[0010] In the second aspect, the present application proposes a measurement method, which is applicable to any water flow detection device as described in the first aspect, including: determining the immersion length of the measuring rod in water based on the total current and the current voltage; determining the water level height of the water flow based on the pressure data and the immersion length; determining the flow velocity data based on the pressure data, the wind force data and the wind direction data.

[0011] In some embodiments, determining the immersion length of the measuring rod in water based on the total current and the current voltage includes: determining the total resistance of the conductive circuit based on the total current and the current voltage; obtaining a preset resistance value of the measuring resistor in the measuring rod; determining the number of submerged measuring electrodes based on the total resistance and the preset resistance value; and determining the immersion length of the measuring rod in water based on the distribution distance of the measuring electrodes on the measuring rod and the submerged number.

[0012] In some embodiments, the pressure data includes: a pressure value; determining the water level of the water flow based on the pressure data and the immersion length includes: obtaining a deformation comparison table preset for the measuring rod based on the pressure value, the deformation comparison table including the actual height of each position on the measuring rod under the target pressure value; determining the water level of the water flow based on the deformation comparison table and the immersion length.

[0013] In some embodiments, the pressure data also includes: pressure direction; determining the flow rate data based on the pressure data, the wind force data and the wind direction data includes: obtaining the water flow direction of the water area where the water flow detection device is located; decomposing the pressure value of the pressure data according to the wind direction data, the wind force data, the pressure direction and the water flow direction to obtain the target pressure along the water flow direction; determining the water flow rate data based on the target pressure.

[0014] In the third aspect, the present application proposes a flood prevention and warning method, which is applicable to any flood prevention and warning system as described in the first aspect, including: obtaining flow velocity data and water level height of each water area upstream of the target reservoir; determining the inflow flow of the target reservoir at each time in the future based on the flow velocity data and the water level; obtaining the current reservoir water level of the target reservoir; determining the drainage strategy of the target reservoir based on the inflow flow and the reservoir water level; and determining whether to issue a flood prevention and warning based on the drainage strategy.

[0015] The present invention provides a reservoir flood warning system, comprising: a wind detection device installed in the relevant waters upstream of the target reservoir, for detecting real-time wind speed and wind direction data in the waters; a water flow detection device installed in the relevant waters upstream of the target reservoir, communicating with the wind detection device in the waters, for detecting the real-time water level in the waters, and determining the real-time flow velocity data of the water flow based on the wind speed and wind direction data detected by the wind detection device; and a flood warning device communicating with the water flow detection device and the wind detection device, for issuing flood warnings based on the flow velocity data and water level detected by the water flow detection devices in each water area. The system solves the problem of weak flood prevention effects caused by observing the reservoir water level in the prior art, realizes the prediction of the reservoir water level in the future, and thus can issue flood warnings earlier. It can also better play the role of the reservoir, giving downstream areas more time to prepare for flood prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments.

[0017] Figure 1 A schematic structural diagram of a flood prevention and early warning system provided in an embodiment of the present application;

[0018] Figure 2 A schematic structural diagram of a water flow detection device provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the structure of the bending state of the measuring rod provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a circuit arrangement in a measuring rod provided in an embodiment of the present application;

[0021] Figure 5 A flow chart of a measurement method provided in an embodiment of the present application;

[0022] Figure 6 A flowchart of a flood prevention and early warning method provided in an embodiment of the present application.

[0023] In the figure: 100 - water flow detection device, 101 - power generation cabin, 102 - generator, 103 - water inlet, 104 - water outlet, 120 - measuring rod, 121 - negative electrode line, 122 - positive electrode line, 123 - measuring resistor, 124 - measuring electrode, 130 - battery, 140 - processor, 141 - current detection device, 200 - wind detection device, 300 - flood prevention and early warning device. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0025] A reservoir is generally defined as a hydraulic engineering structure that stores water and regulates water flow, and can be used for irrigation, power generation, flood control, and fish farming. It refers to an artificial lake formed by building a dam at the mouth of a ravine or river. Once completed, a reservoir can serve various purposes, including flood control, water storage for irrigation, water supply, power generation, and fish farming. Reservoir management requires constant monitoring of the reservoir's water level. During flood control periods, dedicated personnel are typically assigned to inspect the reservoir's water level and use this information to issue flood warnings. However, this flood control approach doesn't allow downstream areas more time to prepare for flood control, resulting in less effective warnings.

[0026] In order to solve the above technical problems, the present invention proposes a flood prevention and warning system for a reservoir. The implementation details of the method for determining the bandwidth of this embodiment are specifically described below. The following content is only the implementation details provided for easy understanding and is not necessary for implementing this solution.

[0027] Example 1:

[0028] In order to achieve better flood prevention warnings and enable the downstream areas of the reservoir to receive flood prevention information earlier, it is necessary to have a certain prediction function for the reservoir water level. The water level of the reservoir is mainly affected by the water area flowing into the reservoir. Therefore, if the water flow changes in the water area upstream of the reservoir can be observed in advance, the water level changes in the reservoir can be predicted. Then, the working status of the reservoir can be adjusted in time according to the predicted water level changes, buying more time for the downstream to install flood prevention equipment. In order to obtain the flow rate and water level of each water area upstream of the reservoir, various detection devices for detecting water flow and water level must be installed upstream of the reservoir.

[0029] The water level detection device and flow rate detection device in the prior art are two devices, and have a complex structure and are inconvenient to power. They need to be powered by cables on the shore or other power supply methods, which makes the detection of water levels and flow rates in various water areas subject to many restrictions. In order to eliminate these restrictions and make the detection of flow rate and water level in water areas more convenient, this application proposes a water level detection device and a flood prevention and warning system equipped with the water level detection device.

[0030] So if Figure 1 As shown, this application proposes a reservoir flood prevention and early warning system, including:

[0031] The wind detection device 200 is installed in the relevant water area upstream of the target reservoir and is used to detect the real-time wind speed data and wind direction data of the water area.

[0032] The water flow detection device 100 is installed in the relevant water area upstream of the target reservoir and is communicated with the wind force detection device 200 in the water area. It is used to detect the real-time water level height of the water area and determine the real-time flow velocity data of the water flow based on the wind speed data and wind direction data detected by the wind force detection device 200.

[0033] In some embodiments, as Figure 2 and Figure 3 As shown, the water flow detection device 100 includes: the water flow detection device 100 includes: a measuring rod 120, a pressure sensor array, a power generation cabin 101, a battery 130, a communication module, a processor 140 and a generator 102.

[0034] The power generation chamber 101 is installed underwater. It includes a water inlet 103 and a water outlet 104. The water inlet 103 is located upstream of and higher than the water outlet 104. The generator 102 is installed within the power generation chamber 101 and is electrically connected to the battery 130. It is used to generate electricity from the water flow and charge the battery 130. The water flow detection device 100 in this application is primarily divided into three parts: a power generation unit, a measurement unit, and a processing unit. For power generation, this application utilizes underwater power generation. When the generator cabin 101 is placed underwater, water will flow in through the water inlet 103 of the generator cabin 101, driving the generator 102 to rotate, thereby generating electricity. The water will then flow out of the water outlet 104 of the generator cabin 101. Since the water inlet 103 is located upstream of the water outlet 104 and is higher than the water outlet 104, water can flow in from the water inlet 103 and drive the generator 102 to rotate. Since the generator cabin 101 is a cube, when the generator cabin 101 is placed underwater, a small cavity will be formed in the area where the water outlet 104 is located. The water flowing out of the water outlet 104 itself has a certain flow rate, so the water in the generator cabin 101 can flow back into the water area, thereby meeting the working conditions of the generator 102.

[0035] The battery 130 is installed in the power generation cabin 101 and supplies power to the measuring electrode 124, the processor 140 and the communication module. A voltage detection device is also provided in the battery 130, and the voltage detection device is electrically connected to the processor 140 for collecting the current voltage of the battery 130. The water flow detection device 100 in this application does not use the direct power supply of the generator 102, but is powered by the battery 130, so the generator 102 is only used to charge the battery 130. In this application, the battery 130 is required to perform functions for multiple devices, so a voltage detection device is also provided in the battery 130 for detecting the voltage of the battery 130 at various times. The voltage detection of the battery 130 can also better control whether the battery 130 needs to be charged by the generator 102.

[0036] The measuring rod 120 is an elastic rod, one end of which is fixedly connected to the top of the power generation cabin 101. A plurality of measuring electrodes 124 are evenly arranged on the measuring rod 120. The measuring electrodes 124 can conduct after being submerged in water, and the measuring electrodes 124 are electrically connected to the processor 140. A positive line 122 and a negative line 121 are provided within the measuring rod 120. The positive line 122 and the negative line 121 are respectively connected to the two poles of the measuring electrodes 124, and a measuring resistor 123 is provided between two adjacent measuring electrodes 124. The positive line 122 and the negative line 121 are respectively connected to the positive and negative poles of the battery 130. A current detection device 141 is provided at the connection between the positive line 122 or the negative line 121 and the battery 130. The current detection device 141 is electrically connected to the processor 140 and is used to detect the total current of the loop formed by the positive line 122 and the negative line 121 .

[0037] The pressure sensor array is installed at the connection between the measuring rod 120 and the power generation cabin 101, and is electrically connected to the processor 140, for detecting the pressure data generated by the measuring rod 120 on the pressure sensor array when subjected to external force, and transmitting the pressure data to the processor 140.

[0038] The measuring unit in this application primarily includes a measuring rod 120 and a pressure sensor array. The measuring rod 120 is fixedly connected to the top of the power generation chamber 101, while the pressure sensor array is located at the junction of the power generation chamber 101 and the measuring rod 120. Since part of the measuring rod 120 is submerged in water, the measuring rod 120 itself is impacted by the water flow. The impact force of the water flow on the measuring rod 120 ultimately acts at the junction of the measuring rod 120 and the power generation chamber 101. Therefore, by providing a pressure sensor at the junction of the power generation chamber 101 and the measuring rod 120, the impact force on the measuring rod 120 can be measured. Of course, the measuring rod 120 is not entirely submerged; some portion of it is above the water surface. The portion of the measuring rod 120 above the water surface is also impacted by wind. Therefore, in order to accurately detect the impact force of the water flow on the measuring rod 120, a wind force detection device 200 is provided in the flood control and early warning system. This wind force detection device 200 is used to determine the impact force of the wind on the measuring rod 120. Since the wind direction is uncertain, the direction of the combined force of wind and water flow on the measuring rod 120 is also uncertain. Therefore, if a small number of pressure sensors are used, it will be difficult to collect the accurate value of the impact force on the measuring rod 120. Therefore, in this application, multiple pressure sensors are combined into a pressure sensor array, and the impact force and direction received by the measuring rod 120 are collected in the form of an array, that is, the pressure data in this application. The pressure data is then decomposed according to the wind direction, wind force and water flow direction to obtain the impact force of the water flow on the measuring rod 120. After knowing the impact force of the water flow on the measuring rod 120, the flow rate of the water flow can be easily obtained. In addition, considering that if the measuring rod 120 uses a rigid measuring rod 120, the pressure data collected by the pressure sensor will have greater volatility, the measuring rod 120 used in this application is an elastic measuring rod 120.

[0039] Since different water levels will result in different lengths of the measuring rod 120 immersed in water, the water level of the water area can also be measured by measuring the length of the measuring rod 120 immersed in water. Since an elastic rod is used as the measuring rod 120 in this application, when the measuring rod 120 is subjected to an impact force, the measuring rod 120 will bend, and when the measuring rod 120 bends, the height of each position on the measuring rod 120 will change. Therefore, in this application, the degree of bending of the measuring rod 120 can be determined by pressure data, and then the water level can be determined based on the degree of bending of the measuring rod 120 and the length of immersion of the measuring rod 120 in water. Figure 3 As shown in the figure, L1 is the submerged length of the measuring rod 120 in the water, and H1 is the actual height of the measuring rod 120 in the water. After obtaining the actual height of the measuring rod 120 in the water, the water level of the water area can be easily calculated.

[0040] When determining the immersion length of the measuring rod 120, taking into account the conductivity of water, the present application arranges a positive wire and a negative wire inside the measuring rod 120, and arranges multiple electrodes on the positive wire and the negative wire. The electrodes of the same sequence on the positive wire and the negative wire form an electrode pair, that is, the measuring electrode 124 in the present application. One end of the measuring electrode 124 penetrates the measuring rod 120 and is evenly arranged on the surface of the measuring rod 120. When the water flow submerges the measuring electrode 124, the electrode pair completes conduction. In order to obtain more accurate measurement results, a measuring resistor 123 is set between two adjacent electrodes on the positive line 122 or the negative line 121 in this application, or a measuring resistor 123 is set between two adjacent electrodes on both the positive line 122 and the negative line 121. Then, when a certain measuring electrode 124 is submerged, the circuit where its corresponding measuring resistor 123 is located will be turned on. At this time, the total current of the entire circuit can be obtained by the current detection device 141 set at the connection between the positive line 122 or the negative line 121 and the battery 130, and then the data of the submerged measuring electrode 124 on the measuring rod 120 can be determined, and then the submerged length of the measuring rod 120 can be obtained. Among them, the setting method of a certain circuit in the measuring rod 120 is as follows: Figure 4 shown.

[0041] The processor 140 can collect the total current of the conductive circuit on the measuring rod 120 and the current voltage of the battery 130, and determine real-time water velocity data and water level based on the total current, the current voltage, the pressure data, the wind speed data, and the wind direction data. The communication module is mounted on the top of the measuring rod 120 and is in communication with the flood control and early warning device 300 and the wind force detection device 200 in the same water area. It is used to transmit collected data to the flood control and early warning device 300 and receive wind force data and wind direction data sent by the wind force detection device 200.

[0042] The water flow measuring device in the present application is provided with a processor 140, which is mainly used to calculate the flow velocity and water level of the water flow based on the measured pressure data and current data. Of course, the flow velocity data and water level measured by the water flow detection device 100 in the present application need to be transmitted to the flood control and early warning device 300, so that the flood control and early warning device 300 can perform flood control and early warning based on the flow velocity data and water level collected by the water flow detection device 100. Therefore, a communication module is also provided in the present application, through which the flow velocity data and water level obtained by the processor 140 can be sent to the flood control and early warning device 300, and at the same time, the wind force data and wind direction data detected by the wind force detection device 200 in the same water area can also be received.

[0043] The flood prevention and warning device 300 is in communication with the water flow detection device 100 and the wind force detection device 200 and is used to provide flood prevention and warning based on the flow velocity data and water level height detected by the water flow detection device 100 in each water area.

[0044] After the flood prevention and warning device 300 obtains the flow rate data and water level height of each water area upstream of the target reservoir, it can predict the inflow flow of water into the reservoir at various times in the future based on the flow rate data and water level height of each water area, thereby better realizing flood prevention and warning, so that flood prevention and warning can be issued to the downstream earlier, so that the downstream has more time to make flood prevention preparations.

[0045] Example 2:

[0046] like Figure 5 As shown, for the water flow detection device mentioned in this application, this application also proposes a measurement method, which is mainly used for the processor of the water flow detection device in Example 1. The measurement method includes:

[0047] Step S1: determining the immersion length of the measuring rod in water according to the total current and the current voltage.

[0048] In some embodiments, step S1 of “determining the submerged length of the measuring rod in water according to the total current and the current voltage” includes:

[0049] Step S11: determining the total resistance of the conductive circuit according to the total current and the current voltage.

[0050] Step S12: obtaining a preset resistance value of the measuring resistor in the measuring rod.

[0051] Step S13: determining the submerged number of the measuring electrodes according to the total resistance and the preset resistance value.

[0052] Step S14: determining the submerged length of the measuring rod in water according to the distribution distance of the measuring electrodes on the measuring rod and the submerged quantity.

[0053] Since a measuring resistor is set between each measuring electrode on the measuring rod in this application, generally speaking, the resistance value of the measuring resistor is certain. Therefore, after the measuring electrode is submerged, the circuit where the measuring electrode is located will be turned on, and as the conductive circuit increases, the current value collected by the current sensor will also increase. However, the magnitude of the current value is not only affected by the access resistance, but also by the voltage. Therefore, in this application, the access resistance value of the circuit can be determined by combining the current voltage of the battery and the total current collected by the current sensor. Since the resistance values ​​of each measuring resistor are consistent, the number of access resistors can be calculated by the access resistance value. Since there is a corresponding relationship between the measuring resistor and the measuring electrode, the number of connected measuring electrodes can be known. The measuring electrodes are evenly distributed on the measuring rod, so the spacing between each measuring electrode is equal. Then, according to the number of connected measuring electrodes, the immersion length of the measuring rod submerged in water can be obtained.

[0054] Step S2: determining the water level of the water flow according to the pressure data and the immersion length.

[0055] In some embodiments, step S2 of “determining the water level of the water flow according to the pressure data and the immersion length” includes:

[0056] Step S21: obtaining a preset deformation comparison table for the measuring rod according to the pressure value, wherein the deformation comparison table includes the actual height of each position on the measuring rod under the target pressure value.

[0057] Step S22: determining the water level of the water flow according to the deformation comparison table and the immersion length.

[0058] Since the measuring rod used in this application is an elastic rod, the measuring rod will bend and deform when subjected to external force. In the bent state, the height of each measuring electrode on the measuring rod from the ground will change. Therefore, when determining the water level, this application also needs to consider the bending of the measuring rod. The pressure data can characterize the situation of the measuring rod being subjected to external force, and then the degree of bending of the measuring rod can be determined. In order to finally calculate the stability of the structure, this application can determine the height of each measuring electrode from the ground under different external forces by measuring in advance, and then form a deformation comparison table. Therefore, the deformation comparison table of the measuring rod under the pressure value can be obtained in the database through the pressure value, and then the immersion height of the measuring rod can be obtained according to the immersion length of the measuring rod and the deformation comparison table. The height of the power generation cabin is known, and the height of the river bottom and the reference surface is also known, and then the water level of the water flow can be obtained.

[0059] Step S3: determining the flow velocity data according to the pressure data, the wind force data and the wind direction data.

[0060] In some embodiments, step S3 of “determining the flow velocity data based on the pressure data, the wind force data, and the wind direction data” includes:

[0061] Step S31: Obtain the direction of water flow in the water area where the water flow detection device is located.

[0062] Step S32: Decomposing the pressure value of the pressure data according to the wind direction data, the wind force data, the pressure direction and the water flow direction to obtain a target pressure along the water flow direction.

[0063] Step S33: Determine the flow rate data of the water flow according to the target pressure.

[0064] Since the pressure data collected by the pressure sensor array represents the external force applied to the measuring rod, but the external force applied to the measuring rod is the combined force of wind force and water flow impact force, it is necessary to eliminate the wind force in order to obtain the pressure data generated by the water flow impact force. Therefore, in this application, the wind force data and wind direction data collected by the wind force detection device in the same water area as the water flow detection device are combined with the water flow direction in the water area to decompose the pressure data, and then obtain the target pressure along the water flow direction, that is, the impact force of the water flow on the measuring rod. After obtaining the impact force of the water flow on the measuring rod, the flow velocity data of the water flow can be easily obtained.

[0065] Through the above-mentioned measurement method, the present application enables the water flow detection device to measure the water flow through a simple structure, and can also improve the accuracy of the measurement results, making the measurement results more accurate.

[0066] Example 3:

[0067] like Figure 6 As shown, this application proposes a flood warning method for the flood warning system in Example 1, which is mainly applicable to flood warning devices. The flood warning method includes:

[0068] Step S4: Obtain flow velocity data and water level heights of each water area upstream of the target reservoir.

[0069] To achieve better flood prevention warnings and enable those downstream of the reservoir to receive flood prevention information earlier, it is necessary to have a certain prediction function for the reservoir's water level. The reservoir's water level is mainly affected by the water area flowing into the reservoir. Therefore, if the flow changes in the water area upstream of the reservoir can be observed in advance, the water level changes in the reservoir can be predicted. Then, the working status of the reservoir can be adjusted in time according to the predicted water level changes, giving the downstream more time to install flood prevention equipment. Therefore, this application needs to obtain the flow rate data and water level height of each water area upstream of the target reservoir.

[0070] Step S5: determining the inflow flow of the target reservoir at each moment in the future according to the flow velocity data and the water level.

[0071] Since the water flow collected at the water area measurement point will not flow into the target reservoir until some time has passed, the inflow flow into the reservoir at each moment in the future can be determined by combining the setting position of each water flow detection device and the corresponding flow rate data and water level height.

[0072] Step S6: Obtain the current water level of the target reservoir.

[0073] Step S7: Determine the drainage strategy of the target reservoir according to the inflow flow and the reservoir water level.

[0074] Step S8: Determine whether to issue a flood prevention warning based on the drainage strategy.

[0075] When the water level in the reservoir reaches a certain level, it needs to be drained downstream. However, the amount of water discharged can be adjusted. When the amount of water discharged is within a certain range, it will not cause flooding disasters downstream. Therefore, in this application, the drainage strategy for the future period of time can be planned based on the inflow flow at various times in the future and the current water level of the reservoir. In other words, if a flood disaster has already occurred upstream of the reservoir, the drainage strategy can be used to minimize the impact of the flood disaster on the reservoir as much as possible, thereby allowing the downstream to have more time to prepare for flood prevention and better improve the flood prevention and early warning capabilities of the reservoir.

[0076] Those skilled in the art will understand that all or part of the steps in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a program, which is stored in a storage medium and includes a number of instructions for causing a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps in the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0077] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A flood prevention and early warning system for a reservoir, characterized in that: include: A wind detection device is installed in the relevant waters upstream of the target reservoir to detect real-time wind speed and direction data in the waters; a water flow detection device, installed in the relevant water area upstream of the target reservoir, communicating with the wind force detection device in the water area, for detecting the real-time water level of the water area, and determining the real-time flow velocity data of the water flow based on the wind speed data and wind direction data detected by the wind force detection device; The flood prevention and warning device is communicatively connected to the water flow detection device and the wind force detection device, and is used to provide flood prevention and warning based on the flow velocity data and water level height detected by the water flow detection device in each water area.

2. The system according to claim 1, wherein: The water flow detection device includes: a measuring rod, a pressure sensor array, a power generation cabin, a battery, a communication module, a processor and a generator; The power generation cabin is installed underwater; The generator is installed in the power generation cabin and is electrically connected to the battery, and is used to generate electricity through water flow and charge the battery; The measuring rod is an elastic rod, one end of which is fixedly connected to the top of the power generation cabin; A plurality of measuring electrodes are evenly arranged on the measuring rod, the measuring electrodes can be turned on after being submerged in water, and the measuring electrodes are electrically connected to the processor; The pressure sensor array is installed at the connection between the measuring rod and the power generation cabin, and is electrically connected to the processor, and is used to detect the pressure data generated by the measuring rod on the pressure sensor array when it is subjected to external force, and transmit the pressure data to the processor; The battery is installed in the power generation cabin to provide power to the measuring electrodes, the processor and the communication module; The communication module is mounted on the top of the measuring rod and is in communication with the flood prevention and early warning device and the wind force detection device in the same water area, and is used to transmit the collected data to the flood prevention and early warning device and receive the wind force data and wind direction data sent by the wind force detection device; The processor can collect the total current of the conductive circuit on the measuring rod and the current voltage of the battery, and determine the real-time flow velocity data and water level height of the water flow based on the total current, the current voltage, the pressure data, the wind speed data and the wind direction data.

3. The system according to claim 2, characterized in that The power generation cabin includes a water inlet and a water outlet. The water inlet is located upstream of the water outlet and is higher than the water outlet.

4. The system according to claim 2, wherein: A positive circuit and a negative circuit are provided in the measuring rod, and the positive circuit and the negative circuit are respectively connected to the two poles of the measuring electrode, and a measuring resistor is provided between two adjacent measuring electrodes; The positive electrode circuit and the negative electrode circuit are connected to the positive electrode and the negative electrode of the battery respectively; A current detection device is provided at the connection between the positive electrode circuit or the negative electrode circuit and the battery; The current detection device is electrically connected to the processor and is used to detect the total current of the loop formed by the positive circuit and the negative circuit.

5. The system according to claim 2, wherein: A voltage detection device is also provided in the battery, and the voltage detection device is electrically connected to the processor and is used to collect the current voltage of the battery.

6. A measurement method, characterized in that: A water flow detection device according to any one of claims 2 to 5, comprising: determining the submerged length of the measuring rod in water according to the total current and the current voltage; determining the water level of the water flow according to the pressure data and the immersion length; The flow velocity data is determined according to the pressure data, the wind force data, and the wind direction data.

7. The method according to claim 6, characterized in that Determining the submerged length of the measuring rod in water according to the total current and the current voltage includes: determining a total resistance of the conductive circuit according to the total current and the current voltage; Obtaining a preset resistance value of a measuring resistor in the measuring rod; determining the submerged amount of the measuring electrode according to the total resistance and the preset resistance value; The submerged length of the measuring rod in water is determined according to the distribution distance of the measuring electrodes on the measuring rod and the submerged amount.

8. The method according to claim 6, characterized in that The pressure data includes: a pressure value; and determining the water level of the water flow according to the pressure data and the immersion length includes: Obtaining a preset deformation comparison table for the measuring rod according to the pressure value, wherein the deformation comparison table includes the actual height of each position on the measuring rod under the target pressure value; The water level height of the water flow is determined according to the deformation comparison table and the immersion length.

9. The method according to claim 8, characterized in that The pressure data further includes: pressure direction; and determining the flow velocity data based on the pressure data, the wind force data, and the wind direction data includes: Obtaining the direction of water flow in the water area where the water flow detection device is located; Decomposing the pressure value of the pressure data according to the wind direction data, the wind force data, the pressure direction, and the water flow direction to obtain a target pressure along the water flow direction; The flow rate data of the water flow is determined according to the target pressure.

10. A flood prevention and early warning method, characterized in that: The flood prevention and early warning system according to any one of claims 1 to 5 comprises: Obtaining flow velocity data and water level heights of various water areas upstream of the target reservoir; Determine the inflow flow of the target reservoir at each time in the future according to the flow velocity data and the water level; Get the current water level of the target reservoir; determining a drainage strategy for the target reservoir according to the inflow flow and the reservoir water level; Determine whether to issue a flood warning based on the drainage strategy.

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