An intelligent flood control monitoring device and monitoring method for water conservancy projects

Abstract

The present invention relates to the field of river water level measurement, and specifically to an intelligent flood control monitoring device for water conservancy projects and a monitoring method thereof, wherein the device comprises a plurality of counterweight boxes, the counterweight boxes are connected by a second cable, each counterweight box is connected to a floating box by a first cable, the floating ranges of adjacent floating boxes overlap, and the directly measured water level fluctuation and river channel drop are corrected according to the difference in river channel drop and water level fluctuation of adjacent floating boxes at the same position. The present invention not only expands the monitoring range but also improves the accuracy of the monitoring data.

Description

Technical Field

[0001] The invention relates to the field of river water level measurement, and in particular to an intelligent flood control monitoring device for water conservancy projects and a monitoring method thereof. Background Art

[0002] In water conservancy projects, flood control monitoring helps to scientifically manage rivers and lakes, control water levels and flows, prevent excessive rise and fall of water bodies and siltation, and maintain a good water ecological environment. At the same time, through real-time monitoring of the water level, flow and structural status of reservoirs, dams and rivers, potential safety hazards can be discovered and eliminated in a timely manner, the failure and collapse of water conservancy projects can be prevented, and the safe operation of the projects can be ensured.

[0003] However, existing flood control monitoring devices can only monitor at fixed points or in a small local area. For example, CN215491968U discloses an intelligent flood control monitoring device for water conservancy projects, which cannot obtain accurate river water level data and riverbed changes over a large area at low cost and for a long time, and thus cannot carry out comprehensive flood control monitoring. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an intelligent flood control monitoring device and a monitoring method for water conservancy projects.

[0005] The intelligent flood control monitoring device and monitoring method for water conservancy projects of the present invention adopt the following technical solutions:

[0006] An embodiment of the present invention provides an intelligent flood control monitoring device for a water conservancy project, the device comprising a floating box floating on the water surface and a counterweight box sunk to the bottom of the water, the counterweight boxes in the device are multiple and arranged in sequence along the river channel, and two adjacent counterweight boxes are connected by a second cable;

[0007] Each counterweight box is connected to a floating box via a first cable, and the winding roller in each counterweight box changes the position of the floating box by controlling the retraction and extension of the first cable under the drive of a motor; wherein when the first cable reaches the maximum pay-out length, the horizontal distance between the floating box and the counterweight box is greater than the horizontal distance between adjacent counterweight boxes;

[0008] Each floating box contains a sensor module and a processor; the sensors in the sensor module include: an ultrasonic water level meter and a positioning device for obtaining the water level height, and the processor is used to read the data collected by all sensors in the sensor module.

[0009] Another embodiment of the present invention provides a monitoring method of an intelligent flood control monitoring device for a water conservancy project, the method comprising:

[0010] The pay-out length of the first cable line is increased sequentially, and the water level height when the floating box is at each position during the increase of the pay-out length is recorded as the first water level height; when the pay-out length of the first cable line is the maximum, the pay-out length of the first cable line is reduced; the water level height when the floating box is at each position during the decrease of the pay-out length is recorded as the second water level height;

[0011] The riverbed drop at each location is obtained according to the difference in the first water level heights between all locations, and the difference between the second water level height and the first water level height at each location is recorded as the water level fluctuation at each location;

[0012] The process of obtaining the riverbed drop at each location and the water level fluctuation at each location is recorded as one measurement process, and the difference in the riverbed drop at each location between two adjacent measurement processes is recorded as the riverbed erosion degree at each location;

[0013] The difference in riverbed drop of adjacent floating boxes at the same position is recorded as the drop error coefficient of adjacent floating boxes at the same position, and the difference in water level fluctuation of adjacent floating boxes at the same position is recorded as the water level error coefficient of adjacent floating boxes at the same position. The drop error coefficients of all the same positions are fused according to the water level error coefficients and the riverbed erosion degree at the same position to obtain the riverbed drop correction value. The water level fluctuation and riverbed drop at each position of the adjacent floating boxes are corrected based on the riverbed drop correction value. The abnormal areas of the river channel are monitored according to the corrected water level fluctuation and riverbed drop.

[0014] Preferably, the step of fusing the drop error coefficients at all the same positions according to the water level error coefficients at all the same positions and the riverbed erosion degree at the same positions to obtain the riverbed drop correction value includes the following specific steps:

[0015] For all identical positions of adjacent floating boxes, the minimum value of the riverbed erosion degree and the water level error coefficient at the same position is obtained, denoted as x, and the water level change attention at the same position is obtained, and the water level change attention is negatively correlated with x; the water level change attention at all identical positions is normalized, and the normalized water level change attention is used as the weight to perform weighted averaging on the drop error coefficients at all identical positions to obtain the riverbed drop correction value.

[0016] Preferably, the method of correcting the water level fluctuation and riverbed drop at each position of the adjacent floating boxes based on the riverbed drop correction value includes the following specific steps:

[0017] For each position of adjacent floating boxes, the predicted water level change at each position is obtained according to the riverbed drop correction value, and the riverbed drop at each position minus the predicted water level change at each position is taken as the corrected riverbed drop at each position; the water level fluctuation of the adjacent floating boxes at each position is corrected according to the corrected riverbed drop at each position.

[0018] Preferably, the method of correcting the water level fluctuation of the adjacent floating box at each location according to the corrected riverbed drop at each location includes the following specific steps:

[0019] The absolute value of the difference between the corrected riverbed drop at each location in each measurement process and the previous measurement process is obtained, and recorded as the final riverbed erosion degree at each location. The location where the final riverbed erosion degree is less than the first preset threshold is obtained and recorded as the target location. The water level fluctuation of all target locations and the average of the riverbed drop correction value are recorded as the corrected water level fluctuation of each location in each measurement process.

[0020] Preferably, the monitoring of abnormal river channel areas according to the corrected water level fluctuation and riverbed drop comprises the following specific steps:

[0021] Obtaining the river flood control coefficient at each location according to the corrected water level fluctuation at each location and the final riverbed erosion degree at each location, and the area formed by the locations where the river flood control coefficient is greater than the second preset threshold is recorded as the river abnormal area;

[0022] The river flood control coefficient is positively correlated with the corrected water level fluctuation and the final riverbed erosion degree.

[0023] Preferably, after obtaining the abnormal river channel area, the following steps are further included:

[0024] The time interval from the end of each measurement process to the beginning of the next measurement process is T0=(1-W)×T, where T is the preset maximum time interval and W is the maximum value of the river flood control coefficient of all floating boxes at all locations in each measurement process;

[0025] For the next measurement process of each measurement process, in the process of increasing the pay-off length or reducing the pay-off length of the next measurement process, the pay-off speed is set to V0=(1+W)×V, where V is the preset minimum pay-off speed.

[0026] Preferably, the step of obtaining the riverbed drop at each location according to the difference in the first water level heights between all locations further includes:

[0027] During the process of increasing the line-paying length of the upstream counterweight box, the first water level height of the floating box when the line-paying length is the shortest is recorded as the reference height, and the difference between the first water level height and the reference height at each position is recorded as the riverbed drop at each position.

[0028] Preferably, the water level change concern at the same position is exp(-x), wherein exp() represents an exponential function with a natural constant as the base.

[0029] Preferably, the step of obtaining the predicted water level change at each location according to the riverbed drop correction value comprises the following specific steps:

[0030] Obtain the time length t of the process of increasing the length of the pay-off;

[0031] The predicted water level change at each location is s=t1×H / t, where H represents the riverbed drop correction value, and t1 represents the time it takes for the floating box to float to each location starting from the time the first cable line is released.

[0032] The beneficial effects of the technical solution of the present invention are:

[0033] The monitoring device provided by the present invention comprises a plurality of counterweight boxes, which are connected by a second cable, and each counterweight box is connected to a floating box by a first cable, and the floating ranges of adjacent floating boxes overlap. Further, the present invention integrates and corrects the drop error coefficient by the difference in water level fluctuation between two adjacent floating boxes at the same position and the riverbed erosion degree during two adjacent measurements, and obtains a riverbed drop correction value, which avoids the measurement error interference problem caused by the possible water level change and riverbed change to a certain extent, making the riverbed drop correction value more reliable. The riverbed drop correction value indicates the interference amount of the water level change on the riverbed drop when measuring the riverbed drop, and further uses the riverbed drop correction value to correct the riverbed drop and water level fluctuation at each position, further ensuring the measurement accuracy of the riverbed drop and water level fluctuation. The present invention obtains accurate river water level data and riverbed changes in a large range at a low cost, for a long time, and over a large range, ensuring the comprehensiveness and reliability of flood control monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of an intelligent flood control monitoring device for a water conservancy project provided by an embodiment of the present invention;

[0036] Figure 2 The present invention is a flowchart of a monitoring method of an intelligent flood control monitoring device for a water conservancy project provided by an embodiment of the present invention.

[0037] Figure 1 In the figure: 1. Floating box; 2. Counterweight box; 3. Winding roller; 4. Sensor module; 5. Processor; 6. First cable line; 7. Second cable line. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of an intelligent flood control monitoring device for water conservancy projects and its monitoring method according to the present invention, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0039] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0040] The specific scheme of an intelligent flood control monitoring device for water conservancy projects and a monitoring method thereof provided by the present invention is described in detail below with reference to the accompanying drawings.

[0041] Embodiment 1:

[0042] like Figure 1 As shown, this embodiment provides an intelligent flood control monitoring device for water conservancy projects, and the device includes two or more (for example, 10) counterweight boxes 2. The counterweight boxes 2 in this embodiment need to be sunk to the bottom of the water. In order to ensure that the counterweight boxes 2 are stable at the bottom of the water and avoid being washed away by the water flow, metal counterweights are installed in the counterweight boxes 2.

[0043] At the same time, all the counterweight boxes 2 are arranged in sequence in the river channel. In this embodiment, all the counterweight boxes 2 are arranged at equal intervals along the river channel. In other embodiments, the number and spacing of the counterweight boxes 2 can be set to other values ​​according to the specific river channel distribution and the length of the river channel that needs flood control monitoring, which is not specifically limited in this embodiment.

[0044] Adjacent counterweight boxes 2 are connected via a second cable 7 .

[0045] Each ballast box 2 is connected to a floating box 1 via a first cable 6. The floating box 1 needs to float on the water surface, so the floating box 1 is made of lightweight material, such as plastic, and is sealed and hollow inside.

[0046] The counterweight box 2 is internally provided with a winding roller 3, which is controlled by a motor. By controlling the forward and reverse rotation of the winding roller 3, the first cable 6 can be retracted and released. When the length of the first cable 6 is extended, as the length of the released cable gradually increases, the floating box 1 connected to the first cable 6 floats with the water flow and gradually changes its position. When the length of the first cable 6 is recovered, as the length of the released cable becomes shorter, the winding roller 3 will pull the floating box 1 back.

[0047] A sensor module 4 and a processor 5 are installed in the floating box 1, wherein the sensor module 4 includes a variety of sensors. The sensors in this embodiment include: an ultrasonic water level meter for obtaining the water level height, and a positioning device for obtaining the position of the floating box 1; in other embodiments, other sensors are installed according to specific monitoring needs, such as a water flow velocity sensor, an ambient temperature sensor, a rain gauge, etc. It should be noted that the specific structure of the floating box 1 needs to be adjusted according to the function of the installed sensor and the installation method required by the sensor, which will not be described in detail in this embodiment. The processor 5 is used to read the data of all sensors and send the read data through the WiFi module integrated on the processor 5. The processor 5 controls the rotation of the motor through the first cable 6, and the processors 5 of different floating boxes 1 communicate with the second cable 7 through the first cable 6.

[0048] When the device is in use, all the counterweight boxes 2 are placed on the bottom of the water in sequence along the river channel, and the remote control motor drives the winding roller 3 to rotate, and changes the length of the first cable line 6, so that the floating box 1 is directly above the connected counterweight box 2. In other embodiments, the floating box 1 can be placed at other positions above the counterweight box 2, such as above and deviating 15 degrees along the water flow direction, which is not specifically limited in this embodiment. Then, the length of the first cable line 6 is changed at a certain speed, so that the floating box 1 floats to different positions, and the sensor module 4 is used to collect data at different positions, thereby realizing flood control monitoring.

[0049] On the one hand, the above device expands the flood control monitoring range through multiple counterweight boxes 2, and on the other hand, the floating box 1 connected to each counterweight box 2 can float to different positions to collect flood control data, further expanding the flood control monitoring range. Correspondingly, in this embodiment, the floating range of each floating box 1 needs to be able to overlap with the floating range of the adjacent floating box 1 to ensure full coverage of the flood control monitoring range, that is, when the first cable 6 reaches the maximum pay-out length, the horizontal distance between the floating box 1 and the counterweight box 2 is greater than the horizontal distance between the adjacent counterweight boxes 2, for example, the horizontal distance between the floating box 1 and the counterweight box 2 is equal to 1.3 times the horizontal distance between the adjacent counterweight boxes 2. The horizontal distance here refers to the distance along the river path.

[0050] Embodiment 2:

[0051] This embodiment provides a monitoring method for an intelligent flood control monitoring device for a water conservancy project based on the monitoring device in the first embodiment. Figure 2 As shown, the method specifically includes:

[0052] Step S001, obtaining the riverbed drop at each location and the water level fluctuation at each location during each measurement process.

[0053] The processor 5 controls the rotation of the motor so that the winding roller 3 increases the pay-out length of the first cable line 6 in sequence. The water level height when the floating box 1 is at each position during the increase of the pay-out length is recorded as the first water level height; when the pay-out length of the first cable line 6 is the largest, the pay-out length of the first cable line 6 is gradually reduced; the water level height when the floating box 1 is at each position during the decrease of the pay-out length is recorded as the second water level height.

[0054] The riverbed drop at each location is obtained based on the difference in the first water level heights between all locations, and the difference between the second water level height and the first water level height at each location is recorded as the water level fluctuation at each location.

[0055] In the above process, the riverbed drop at each location describes the height trend of the river bottom, and the water level rise and fall at each location describes the height to which the water level rises or falls at each location.

[0056] In the above process, the river channel is described and monitored through two aspects: water level fluctuation and riverbed drop.

[0057] As an example, the riverbed drop at each location is obtained according to the difference in the first water level heights between all locations, including the following steps:

[0058] For the upstreammost counterweight box 2 and the floating box 1 connected thereto, during the process of increasing the line-paying length of the winding roller 3 in the counterweight box 2, the first water level height of the floating box 1 at the position of the floating box 1 when the line-paying length is the shortest is recorded as the reference height, that is, the first water level height when the floating box 1 is closest to the counterweight box 2 is recorded as the reference height.

[0059] For all the floating boxes 1 connected to the ballast boxes 2, the difference between the first water level height and the reference height of each floating box 1 at each position is recorded as the riverbed drop at each position.

[0060] In some other embodiments, the reference height may be set to other values, for example, the first water level of the most downstream floating box 1 when the line length is the shortest is recorded as the reference height, or the reference height is directly set to 0.

[0061] The riverbed drop at each position in this embodiment describes the relative height difference of the bottom of the river channel, and does not limit the method for obtaining the reference height.

[0062] Furthermore, the above monitoring of each position on the river is completed by laying out the line (i.e., the process of increasing the length of the line) and reeling in the line (i.e., the process of reducing the length of the line). In this embodiment, the process of laying out and reeling in the line, i.e., the process of obtaining the riverbed drop at each position and the water level fluctuation at each position, is recorded as one measurement process.

[0063] After each measurement process is completed, the next measurement process is performed at a certain interval, such as one day. In other embodiments, other intervals can be set according to the specific conditions of the river. For example, for some rivers that often flood, or require water conservancy construction or construction, or have important construction facilities nearby, the interval can be set shorter, such as one hour. For some rivers with slow water rise and fall and long cycles, the time can be set longer, such as 2 days.

[0064] It should also be noted that the length of the first cable 6 also changes at a certain speed during the process of releasing and retrieving the line. In this embodiment, the length of the line released and retrieving the line per minute is 2 meters. In other embodiments, the speed can be set to other values. Similarly, for example, for some rivers that often flood, or require water conservancy construction or construction, or have important construction facilities nearby, the speed can be set to a larger value, such as 5 meters per minute. For some rivers with slow water rise and fall and long cycles, the speed can be set to a smaller value, such as 0.5 meters per minute.

[0065] By setting different time intervals and speeds according to different river conditions, relevant data of the river water and the river channel can be measured in a timely manner, and the problem of high power consumption and short battery life caused by frequent measurements can be avoided.

[0066] Step S002: Obtain the riverbed erosion degree at each location according to the riverbed drop at each location during two adjacent measurements.

[0067] Furthermore, the difference in riverbed drop at each location during two adjacent measurements was recorded as the riverbed erosion degree at each location.

[0068] The riverbed erosion at each location describes the changes in the riverbed, including the scouring of the riverbed by the river water and the accumulation of silt and sand in the river channel.

[0069] Step S003: Obtain the height error coefficient and water level error coefficient of adjacent floating boxes at the same position.

[0070] When obtaining the riverbed drop at each location during the increase in the length of the above-mentioned line, it is assumed that the river water does not rise or fall during the increase in the length of the line. However, in reality, the rise or fall of the river water depends on the complex natural environment. When the river water rises or falls during the increase in the length of the upper line, the riverbed drop obtained above has obvious errors.

[0071] On the other hand, during the above-mentioned process of reducing the line length, when obtaining the water level fluctuation at each location, it is assumed that there is no scouring and siltation at the bottom of the riverbed (that is, the riverbed drop at each location remains unchanged). However, these situations often exist in the actual process, resulting in changes in the riverbed drop, which in turn leads to errors in the water level fluctuation at each location.

[0072] Based on the above problem, the same position of adjacent floating boxes 1 is obtained (that is, adjacent floating boxes 1 will appear at the same position when floating due to overlapping floating ranges, but not at the same position at the same time).

[0073] The difference in the riverbed drop of adjacent floating boxes 1 at the same position is recorded as the drop error coefficient of adjacent floating boxes 1 at the same position. The larger the drop error coefficient, the greater the error of the riverbed drop obtained by the above method. The smaller the drop error coefficient, the smaller the error of the riverbed drop obtained by the above method.

[0074] Therefore, the height difference error coefficient can be used to correct the riverbed difference between two adjacent floating boxes 1 at each position, so as to reduce the error of the riverbed difference obtained above. For example, one method is to subtract the height difference error coefficient from the riverbed difference at each position as the corrected riverbed difference.

[0075] It should be noted that the difference in riverbed drop at the same location mentioned above refers to the riverbed drop at a later acquisition time minus the riverbed drop at an earlier acquisition time.

[0076] However, the riverbed drop at the same position is not obtained at the same time, but there is a certain time interval. There may be changes in riverbed erosion during this time interval. Therefore, the difference in riverbed drop at the same position mentioned above (that is, the drop error coefficient) not only includes the water surface fluctuation, but also may include the change of riverbed drop. Therefore, the drop error coefficient cannot be directly used to correct the riverbed drop of two adjacent floating boxes 1 at each position.

[0077] Furthermore, the absolute value of the difference in water level fluctuation between adjacent floating boxes 1 at the same position is recorded as the water level error coefficient of adjacent floating boxes 1 at the same position. The larger the water level error coefficient is, the more obvious the change in the height difference of the riverbed occurs when obtaining the water level fluctuation.

[0078] Therefore, the water level error coefficient can be used to correct the drop error coefficient, and then the riverbed drop of the two adjacent floating boxes 1 at each position can be corrected again according to the corrected drop error coefficient. For example, a feasible method is: for the same position where the water level error coefficient is the smallest, the drop error coefficient at the same position is used to correct the riverbed drop of the two adjacent floating boxes 1 at each position.

[0079] However, considering that the above-mentioned water level error coefficients are not obtained at the same time, there will be a certain time interval, and the water level height may change during this time interval. The change in water level height will cause an error in the water level error coefficient.

[0080] Therefore, directly using the water level error coefficient obtained above and combining it with the drop error coefficient to correct the riverbed drop will still introduce a large error.

[0081] Step S004: The height difference error coefficients at all the same positions are merged according to the water level error coefficients at all the same positions and the riverbed erosion degree at the same positions to obtain a riverbed height difference correction value.

[0082] For the same position of adjacent floating boxes 1 in any measurement process, the riverbed erosion degree at the same position is obtained (that is, the absolute value of the riverbed drop at the same position of adjacent floating boxes 1 in any measurement process minus the riverbed drop at the same position in the previous measurement process).

[0083] The riverbed erosion degree at the same location is calculated based on the riverbed drop, and the error in the riverbed drop is caused by the change in water level, so the error in the riverbed erosion degree is also caused by the change in water level. In addition, the error in the water level error coefficient is also caused by the change in water level height.

[0084] In this embodiment, the riverbed drop correction value is obtained by fusing the drop error coefficient according to the riverbed erosion degree at the same position and the water level error coefficient at the same position. In this process, the error caused by the change of water level in the riverbed erosion degree and the water level error coefficient is fused, so that the error of the fusion result (i.e., the riverbed drop correction) becomes smaller.

[0085] As a preferred example, the riverbed drop correction value is obtained by fusing the drop error coefficient according to the riverbed erosion degree at the same position and the water level error coefficient at the same position, including:

[0086] The minimum value of the riverbed erosion degree and the water level error coefficient at the same position is obtained, recorded as x, and exp(-x) is recorded as the water level change attention at the same position. Since there are multiple identical positions of adjacent floating boxes 1, this embodiment normalizes the water level change attention at all identical positions. This embodiment uses the softmax normalization method, and other normalization methods can be used in other embodiments, but it is necessary to ensure that the sum of the water level change attention after normalization is equal to 1.

[0087] exp() represents an exponential function with a natural constant as base.

[0088] In this embodiment, the normalized water level change attention is used as the weight, and the weighted average is performed on the drop error coefficients of all the same positions to obtain the riverbed drop correction value.

[0089] As an optional example, the riverbed drop correction value is obtained by fusing the drop error coefficient according to the riverbed erosion degree at the same location and the water level error coefficient at the same location, including:

[0090] The same positions where the riverbed erosion degree and water level error coefficient are the smallest are obtained respectively, and the drop error coefficients at the same positions are averaged to obtain the riverbed drop correction value.

[0091] Compared with the above preferred example, this method does not combine the specific distribution of water level height variation errors at all the same positions, and the obtained results are not as accurate as the above preferred example. However, this optional example can quickly obtain more accurate results when the overlapping area of ​​the floating ranges of adjacent floating boxes 1 is small.

[0092] In the above process, the riverbed drop correction value is obtained based on the two adjacent floating boxes 1, which describes: the change in water level during the increase of the line length (that is, the process of obtaining the riverbed drop at each position); if the riverbed drop correction value is greater than 0, the water level rises, and if it is less than or equal to 0, the water level does not rise or even drops.

[0093] Step S005: correcting the water level fluctuation and riverbed drop at each position of the adjacent floating boxes based on the riverbed drop correction value.

[0094] Furthermore, for each position of two adjacent floating boxes 1, the riverbed drop at each position is corrected according to the riverbed drop correction value to obtain the corrected riverbed drop at each position.

[0095] As an optional example, the riverbed drop at each location is corrected according to the riverbed drop correction value to obtain the corrected riverbed drop at each location, including:

[0096] For each position of two adjacent floating boxes 1, the riverbed drop at each position is subtracted from the riverbed drop correction value to obtain the corrected riverbed drop at each position.

[0097] As a preferred example, the riverbed drop at each location is corrected according to the riverbed drop correction value to obtain the corrected riverbed drop at each location, including:

[0098] Considering that the water level changes slowly, for example, linearly, during the process of increasing the length of the line, first obtain the time length t of the process of increasing the length of the line (that is, the time required for the process from the minimum length of the first cable line 6 to the maximum length), and for each position of two adjacent floating boxes 1, record the predicted water level change at each position as s=t1×H / t, where H represents the riverbed drop correction value, and t1 represents the time when the floating box 1 floats to each position, starting from the time when the first cable line 6 is first released.

[0099] Then the riverbed drop at each location minus the predicted water level change at each location is taken as the corrected riverbed drop at each location.

[0100] Furthermore, the corrected water level fluctuation at each location is obtained through the corrected riverbed drop at each location.

[0101] As an optional example, a method for obtaining the corrected water level fluctuation at each location includes:

[0102] For all the positions where each floating box 1 floats, the absolute value of the difference between each measurement process and the corrected riverbed drop of each position in the previous measurement process is obtained, which is recorded as the final riverbed erosion degree of each position, and the position where the final riverbed erosion degree is less than the first preset threshold is obtained, which is recorded as the target position, and the average of the water level fluctuations of all target positions is recorded as the corrected water level fluctuations of each position in two adjacent measurement processes. This embodiment is described by taking the first preset threshold equal to 2 cm as an example, and other values ​​can be set in other embodiments, which are not specifically limited in this embodiment.

[0103] The target position indicates the location where the riverbed erosion is relatively small. The water level fluctuation at this location can more accurately reflect the actual water level changes and avoid interference with water level changes caused by erosion such as scouring or siltation of the riverbed.

[0104] At the same time, considering that within a certain time range, the fluctuation of the river water at all locations is the same, the corrected water level fluctuation at each location in this embodiment is equal.

[0105] In some other embodiments, several locations (for example, the smallest quarter) where the final riverbed erosion degree is the smallest may be recorded as target locations.

[0106] In some other embodiments, considering that the process of increasing or decreasing the length of the line is long, the water level fluctuations at different locations may be different. At this time, the corrected water level fluctuation at each location is recorded as the water level fluctuation at the target location closest to each location.

[0107] As a preferred example, the method for obtaining the corrected water level fluctuation at each location includes:

[0108] Taking into account that the riverbed drop correction value describes the change in water level during the increase in the line length (that is, in the process of obtaining the riverbed drop at each location), this embodiment records the water level fluctuation at all target locations and the average of the riverbed drop correction values ​​as the corrected water level fluctuation at each location.

[0109] So far, the corrected riverbed drop and water level fluctuation at each position where the floating box 1 floats during each measurement process are obtained.

[0110] It should be noted that the corrected riverbed drop and water level fluctuation at each position are obtained based on the adjacent floating boxes 1, where a part of the floating boxes 1 has adjacent floating boxes 1 upstream and adjacent floating boxes 1 downstream. At this time, this part of the floating boxes 1 obtains two corrected riverbed drops and water level fluctuations corresponding to each position. In this embodiment, the two corrected riverbed drops and water level fluctuations are respectively averaged as the corrected riverbed drop and water level fluctuation at each position finally obtained in this embodiment.

[0111] In summary, this embodiment integrates and corrects the drop error coefficient by using the difference in water level fluctuation between two adjacent floating boxes 1 at the same position and the riverbed erosion degree during two adjacent measurements to obtain a riverbed drop correction value, which to a certain extent avoids the measurement error interference problem caused by water level changes and riverbed changes at a certain time interval, making the riverbed drop correction value more reliable. The riverbed drop correction value represents the amount of interference of water level changes on the riverbed drop when measuring the riverbed drop, and further uses the riverbed drop correction value to correct the riverbed drop and water level fluctuation at each position, further ensuring the measurement accuracy of the riverbed drop and water level fluctuation.

[0112] It should be additionally explained that the improvement in accuracy of this embodiment is relative to the data directly collected by the sensor module 4. Therefore, the device provided in the above-mentioned embodiment 1 and the method for correcting the monitoring data provided in the above-mentioned embodiment 2 ensure that it is possible to measure and monitor the river channel on a large scale, such as monitoring the rise and fall of the river water at each location on the river channel and the erosion and siltation of the riverbed, and to monitor the data relatively accurately.

[0113] Step S006: monitor abnormal areas of the river channel according to the corrected water level fluctuation and riverbed drop.

[0114] Furthermore, this embodiment monitors the river flooding situation based on the above-mentioned monitoring data (ie, the corrected water level fluctuation and riverbed drop at each location).

[0115] For each position where the floating box 1 floats, the absolute value of the difference between the corrected riverbed drop at each position in each measurement process and the previous measurement process is obtained, and recorded as the final riverbed erosion degree at each position.

[0116] If there is no previous measurement process, the final riverbed erosion at each location is no longer obtained.

[0117] For each location where the floating box 1 floats, the river flood control coefficient of each location is obtained according to the corrected water level fluctuation at each location and the final riverbed erosion degree at each location.

[0118] For all the positions where the floating box 1 floats, the area formed by the positions where the river flood control coefficient is greater than the second preset threshold is recorded as the abnormal river area; then the abnormal river area is reinforced. In other embodiments, the dams, buildings, roads, etc. near the abnormal river area can be maintained to avoid accidents of the dams, buildings, and roads when the river floods, such as avoiding soil erosion of the road foundation.

[0119] In this embodiment, the flood control coefficient of the river channel is positively correlated with the corrected water level fluctuation and the final riverbed erosion. At this time, the larger the corrected water level fluctuation and the final riverbed erosion, the more serious the flood risk in the river channel. The flood risk includes the risk of floods and the risk of unstable riverbed when floods occur (such as the risk of scouring or siltation).

[0120] As an example, the method for obtaining the river flood control coefficient at each location is:

[0121] The corrected water level fluctuation and final riverbed erosion at each location are divided by 1 meter to remove the dimension. The dimensionless water level fluctuation and riverbed drop (that is, the water level fluctuation and final riverbed erosion after dividing by 1 meter) are then averaged and used as the river flood control coefficient for each location.

[0122] In another example, the mean can be replaced by the product.

[0123] In some other embodiments, the method for obtaining the river flood control coefficient at each location is:

[0124] For each position where the floating box 1 floats, the ratio of the corrected water level fluctuation at each position to the time length of a measurement process is recorded as the water level fluctuation speed at each position, which is used to describe the speed of water level change. The water level fluctuation speeds at all positions where the floating box 1 floats are linearly normalized. At the same time, the final riverbed erosion degree at all positions where the floating box 1 floats is also linearly normalized. The normalized water level fluctuation speed at each position is multiplied by the final riverbed erosion degree to obtain the river flood control coefficient at each position. The purpose of linear normalization is to remove the dimension.

[0125] This embodiment is described by taking the second preset threshold value being equal to 0.1 as an example. Other values ​​may be set in other embodiments, which will not be described in detail in this embodiment.

[0126] Embodiment three:

[0127] The difference between this embodiment and the second embodiment is that the time interval between two adjacent measurement processes in this embodiment can be dynamically adjusted, and the specific method is as follows:

[0128] A maximum time interval T is preset, and this embodiment is described by taking T=2 days as an example.

[0129] The time interval from the end of the current measurement process to the beginning of the next measurement process is T0=(1-W)×T, where W is the maximum value of the river flood control coefficient of all floating boxes 1 at all positions in the current measurement process. The larger the value, the greater the flood risk, and the more accurate and more monitoring data (that is, the corrected riverbed drop and water level fluctuation) need to be collected. When W is larger, the time interval between the measurement processes is smaller. On the one hand, the river conditions can be monitored in a timely manner. On the other hand, the smaller the time interval, the smaller the error caused by the change of the riverbed during the interval between two adjacent measurement processes, and the more accurate the above-mentioned final riverbed erosion degree is, thereby ensuring the reliability of the monitoring results (that is, the abnormal area of ​​the river). In addition, when the risk of river flooding is small, the time interval is relatively large. At this time, there is no need to monitor the river frequently, which increases the endurance of the monitoring device.

[0130] In another embodiment, the speed of the line-laying is set to V0=(1+W)×V during the process of increasing or decreasing the line-laying length in the next measurement process, where V is the preset minimum line-laying speed. This embodiment is described by taking 0.1 meters per minute as an example, and W is the maximum value of the flood control coefficient of the river channel of all floating boxes 1 at all positions in the current measurement process. When W is larger, the line-laying speed is larger. On the one hand, the river channel conditions can be monitored in a timely manner. On the other hand, the larger the line-laying speed, the smaller the error caused by the change of the riverbed and the change of the water level during the interval between two adjacent measurement processes, and the more accurately the above-mentioned drop error coefficient and water level error coefficient are obtained, thereby ensuring the reliability of the monitoring results (i.e., the abnormal area of ​​the river channel); in addition, when the risk of flooding in the river channel is small, the smaller the line-laying speed is, the river channel does not need to be monitored frequently, and the endurance time of the monitoring device is increased.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent flood control monitoring device for water conservancy projects, the device comprising a floating box (1) floating on the water surface and a counterweight box (2) sunk to the bottom of the water, characterized in that: There are a plurality of counterweight boxes (2) in the device, which are arranged in sequence along the river channel, and two adjacent counterweight boxes (2) are connected by a second cable (7); Each counterweight box (2) is connected to a floating box (1) via a first cable (6), and the winding roller (3) in each counterweight box (2) changes the position of the floating box (1) by controlling the retraction and extension of the first cable (6) under the drive of a motor; wherein when the first cable (6) reaches a maximum pay-out length, the horizontal distance between the floating box (1) and the counterweight box (2) is greater than the horizontal distance between adjacent counterweight boxes (2); Each floating box (1) comprises a sensor module (4) and a processor (5); the sensor in the sensor module (4) comprises: an ultrasonic water level meter for obtaining the water level height, and a positioning device; the processor (5) is used to read the data collected by all sensors in the sensor module (4); The pay-out length of the first cable (6) is increased sequentially, and the water level height when the floating box (1) is at each position during the process of increasing the pay-out length is recorded as the first water level height; when the pay-out length of the first cable (6) is the maximum, the pay-out length of the first cable (6) is reduced; and the water level height when the floating box (1) is at each position during the process of reducing the pay-out length is recorded as the second water level height; The riverbed drop at each location is obtained according to the difference in the first water level heights between all locations, and the difference between the second water level height and the first water level height at each location is recorded as the water level fluctuation at each location; The process of obtaining the riverbed drop at each location and the water level fluctuation at each location is recorded as one measurement process, and the difference in the riverbed drop at each location between two adjacent measurement processes is recorded as the riverbed erosion degree at each location; The difference in riverbed drop between adjacent floating boxes (1) at the same position is recorded as the drop error coefficient of the adjacent floating boxes (1) at the same position, and the difference in water level fluctuation between adjacent floating boxes (1) at the same position is recorded as the water level error coefficient of the adjacent floating boxes (1) at the same position. The drop error coefficients of all the same positions are merged according to the water level error coefficients of all the same positions and the riverbed erosion degree at the same position to obtain a riverbed drop correction value. The water level fluctuation and riverbed drop of each position of the adjacent floating boxes (1) are corrected based on the riverbed drop correction value. The abnormal area of ​​the river channel is monitored according to the corrected water level fluctuation and riverbed drop. The specific steps of fusing the drop error coefficients at all the same positions according to the water level error coefficients at all the same positions and the riverbed erosion degree at the same positions to obtain the riverbed drop correction value are as follows: For all identical positions of adjacent floating boxes (1), the minimum value of the riverbed erosion degree and the water level error coefficient at the identical position is obtained, recorded as x, and the water level change concern at the identical position is obtained, wherein the water level change concern is negatively correlated with x; the water level change concern at all identical positions is normalized, and the water level change concern after the normalization process is used as the weight, and the weighted average of the drop error coefficients at all identical positions is performed to obtain a riverbed drop correction value; The method of correcting the water level fluctuation and the riverbed drop at each position of the adjacent floating box (1) based on the riverbed drop correction value comprises the following specific steps: For each position of an adjacent floating box (1), a predicted water level change at each position is obtained according to a riverbed drop correction value, and the predicted water level change at each position is subtracted from the riverbed drop at each position to obtain a corrected riverbed drop at each position; and the water level fluctuation at each position of the adjacent floating box (1) is corrected according to the corrected riverbed drop at each position; The method of correcting the water level fluctuation of the adjacent floating box (1) at each position according to the corrected riverbed drop at each position comprises the following specific steps: The absolute value of the difference between the corrected riverbed drop at each location in each measurement process and the previous measurement process is obtained, and recorded as the final riverbed erosion degree at each location. The location where the final riverbed erosion degree is less than the first preset threshold is obtained and recorded as the target location. The water level fluctuation of all target locations and the average of the riverbed drop correction value are recorded as the corrected water level fluctuation of each location in each measurement process.

2. A monitoring method for an intelligent flood control monitoring device for a water conservancy project, characterized in that: The method comprises: The pay-out length of the first cable (6) is increased sequentially, and the water level height when the floating box (1) is at each position during the process of increasing the pay-out length is recorded as the first water level height; when the pay-out length of the first cable (6) is the maximum, the pay-out length of the first cable (6) is reduced; and the water level height when the floating box (1) is at each position during the process of reducing the pay-out length is recorded as the second water level height; The riverbed drop at each location is obtained according to the difference in the first water level heights between all locations, and the difference between the second water level height and the first water level height at each location is recorded as the water level fluctuation at each location; The process of obtaining the riverbed drop at each location and the water level fluctuation at each location is recorded as one measurement process, and the difference in the riverbed drop at each location between two adjacent measurement processes is recorded as the riverbed erosion degree at each location; The difference in riverbed drop between adjacent floating boxes (1) at the same position is recorded as the drop error coefficient of the adjacent floating boxes (1) at the same position, and the difference in water level fluctuation between adjacent floating boxes (1) at the same position is recorded as the water level error coefficient of the adjacent floating boxes (1) at the same position. The drop error coefficients of all the same positions are merged according to the water level error coefficients of all the same positions and the riverbed erosion degree at the same position to obtain a riverbed drop correction value. The water level fluctuation and riverbed drop of each position of the adjacent floating boxes (1) are corrected based on the riverbed drop correction value, and the abnormal area of ​​the river channel is monitored according to the corrected water level fluctuation and riverbed drop.

3. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 2 is characterized in that: The specific steps of fusing the drop error coefficients at all the same positions according to the water level error coefficients at all the same positions and the riverbed erosion degree at the same positions to obtain the riverbed drop correction value are as follows: For all identical positions of adjacent floating boxes (1), the minimum value of the riverbed erosion degree and the water level error coefficient at the identical position is obtained, recorded as x, and the water level change concern at the identical position is obtained, wherein the water level change concern is negatively correlated with x; the water level change concern at all identical positions is normalized, and the water level change concern after the normalization is used as a weight, and the weighted average of the drop error coefficients at all identical positions is obtained to obtain a riverbed drop correction value.

4. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 2 is characterized in that: The method of correcting the water level fluctuation and the riverbed drop at each position of the adjacent floating box (1) based on the riverbed drop correction value comprises the following specific steps: For each position of an adjacent floating box (1), the predicted water level change at each position is obtained based on the riverbed drop correction value, and the riverbed drop at each position minus the predicted water level change at each position is taken as the corrected riverbed drop at each position; and the water level fluctuation at each position of the adjacent floating box (1) is corrected based on the corrected riverbed drop at each position.

5. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 4 is characterized in that: The method of correcting the water level fluctuation of the adjacent floating box (1) at each position according to the corrected riverbed drop at each position comprises the following specific steps: The absolute value of the difference between the corrected riverbed drop at each location in each measurement process and the previous measurement process is obtained, and recorded as the final riverbed erosion degree at each location. The location where the final riverbed erosion degree is less than the first preset threshold is obtained and recorded as the target location. The water level fluctuation of all target locations and the average of the riverbed drop correction value are recorded as the corrected water level fluctuation of each location in each measurement process.

6. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 5 is characterized in that: The specific steps of monitoring the abnormal area of ​​the river channel according to the corrected water level fluctuation and riverbed drop are as follows: Obtaining the river flood control coefficient at each location according to the corrected water level fluctuation at each location and the final riverbed erosion degree at each location, and the area formed by the locations where the river flood control coefficient is greater than the second preset threshold is recorded as the river abnormal area; The river flood control coefficient is positively correlated with the corrected water level fluctuation and the final riverbed erosion degree.

7. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 2 is characterized in that: After obtaining the abnormal river channel area, the following steps are also included: The time interval between the end of each measurement process and the start of the next measurement process is T0=(1-W)×T, where T is the preset maximum time interval, and W is the maximum value of the river flood control coefficient of all floating boxes (1) at all locations in each measurement process; For the next measurement process of each measurement process, in the process of increasing the pay-off length or reducing the pay-off length of the next measurement process, the pay-off speed is set to V0=(1+W)×V, where V is the preset minimum pay-off speed.

8. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 2 is characterized in that: The step of obtaining the riverbed drop at each location according to the difference in the first water level heights between all locations also includes: During the process of increasing the line-laying length of the upstream counterweight box (2), the first water level height at the location of the floating box (1) when the line-laying length is the shortest is recorded as the reference height, and the difference between the first water level height and the reference height at each location is recorded as the riverbed drop at each location.

9. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 3 is characterized in that: The water level change concern at the same position is exp(-x), where exp() represents an exponential function with a natural constant as the base.

10. The monitoring method of the intelligent flood control monitoring device for water conservancy projects according to claim 4, characterized in that: The specific steps of obtaining the predicted water level change at each location according to the riverbed drop correction value are as follows: Obtain the time length t of the process of increasing the length of the pay-off; The predicted water level change at each location is s=t1×H / t, where H represents the riverbed drop correction value and t1 represents the time when the floating box (1) floats to each location starting from the time when the first cable (6) starts to be released.

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