A method and system for monitoring displacement of a water gate

Abstract

The application discloses a water gate displacement monitoring method and system, relates to a water gate, a dam, and data processing technology, and comprises the following steps: setting deformation monitoring points on the dam on the two sides of a water gate in advance; collecting image data of the deformation monitoring points on the two sides of the water gate at fixed angles according to a set time interval, and reserving initial image data as a reference image; extracting a plurality of reference points from the reference image, and matching any image data collected subsequently with the reference image based on the reference points; calculating the deviation between the image data and the reference image; determining a first deformation variable of the deformation monitoring points in the water flow direction according to the deviation; and determining the displacement range of the water gate according to the first deformation variable. The application compares the collected image data with the initial image to determine the displacement of the deformation monitoring points in the water flow direction, so as to convert the displacement of the water gate, and the application can realize long-term and automatic monitoring of the displacement of the water gate and meet the monitoring accuracy requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water gate, dam, data processing, and particularly relates to a water gate displacement monitoring method and system. BACKGROUND

[0002] As the core control facility of water conservancy projects, the structural stability of the water gate is directly related to the flood control safety and water resources scheduling efficiency. Long-term affected by hydraulic impact, foundation settlement and material aging, the water gate is prone to cumulative displacement deformation, and once it exceeds the safety threshold, it will cause the gate body to tilt or even cause dam collapse risk.

[0003] Water gate displacement monitoring is to ensure the safety of water conservancy projects and prevent structural failure. Displacement is a key indicator for evaluating the safety level of the water gate, and needs to be monitored for long-term dynamic monitoring with centimeter-level precision. However, the existing method cannot meet the real-time, long-term and automatic needs. SUMMARY

[0004] The embodiments of the present application provide a water gate displacement monitoring method and system to realize long-term and automatic monitoring of water gate displacement without changing the existing facilities and equipment and meet the monitoring accuracy requirements.

[0005] The embodiments of the present application provide a water gate displacement monitoring method, which comprises the following steps:

[0006] A deformation monitoring point is set on the dam on both sides of the water gate in advance;

[0007] Image data of the deformation monitoring point on both sides of the water gate is collected at a fixed angle according to a set time interval, and the initial image data is reserved as a reference image;

[0008] A plurality of reference points are extracted from the reference image, and any image data collected subsequently is matched with the reference image based on the reference points;

[0009] Based on the matching result, the deviation between the image data and the reference image is calculated;

[0010] According to the deviation, the first deformation variable of the deformation monitoring point in the flow direction is determined;

[0011] According to the first deformation variable, the displacement range of the water gate is determined.

[0012] Optionally, the method further comprises:

[0013] The actual pulling amount of each time the gate is pulled is obtained; and the gate height of the gate under the actual pulling amount is obtained;

[0014] According to the actual pulling amount and the gate height of each time, the displacement of the gate in the flow direction before and after each time the gate is pulled is calculated;

[0015] The displacement amount and the displacement range of each time are taken as a total displacement range of the water gate.

[0016] Optionally, the deformation monitoring point comprises a reference part and a deformation monitoring part arranged separately.

[0017] The reference points are extracted from the reference image, comprising:

[0018] The contour information of the reference part is extracted, and a plurality of reference points distributed in a region away from the reference part by a specified pixel distance are determined from the deformation monitoring part, the determined reference points are distributed in the deformation monitoring part, and there are a plurality of groups of reference points along the water flow direction, and the plurality of groups of reference points are arranged staggeredly.

[0019] Optionally, matching any image data collected later with the reference image based on the reference points comprises:

[0020] A distance relationship between the contour information of the reference image and each reference point is established.

[0021] The contour information of the reference part of any image data collected later is extracted.

[0022] According to the contour information of the image data collected later, the distance relationship is mapped into the any image data.

[0023] Image features in a fixed range of each reference point in the reference image and the any image data are extracted, and comparison is performed by using the extracted image features.

[0024] Optionally, establishing the distance relationship between the contour information of the reference image and each reference point comprises:

[0025] A reference point is selected along the contour information of the reference image, and a pixel distance between the reference point and any reference point is determined.

[0026] The position of the selected reference point is adjusted so that each reference point is matched to one reference point, and the pixel distance between the matched reference points is within a set distance range.

[0027] Optionally, comparison by using the extracted image features comprises:

[0028] Similarities between image features in a fixed range of each two reference points are calculated.

[0029] At least one first path of similarity change is determined along the water flow direction according to the calculated similarities and each group of reference points, and the first path is formed by connecting at least two reference points.

[0030] Optionally, based on the matching result, calculating the deviation between the image data and the reference image comprises:

[0031] Based on the reference image, extracting a fixed range of local images corresponding to the reference points with the similar degree change in the first path from the image data;

[0032] Overlapping the two local images and adjusting the transparency of any of the local images;

[0033] Shifting any of the local images and calculating the definition of the overlapping area after the shift, and recording the shift amount and the shift position that make the definition of the overlapping area maximum, to determine the deviation.

[0034] Optionally, according to the deviation, determining the first deformation amount of the deformation monitoring point in the water flow direction comprises:

[0035] According to the recorded shift amount and shift position, constructing a second path after deformation;

[0036] Calculating the position deviation between the second path and the first path;

[0037] Mapping the position deviation to the water flow direction to obtain the first deformation amount.

[0038] Optionally, according to the first deformation amount, determining the displacement range of the water gate comprises:

[0039] Obtaining the transverse width of the gate slot of the water gate;

[0040] According to the proportional relationship between the first deformation amount and the transverse width, determining the displacement range of the water gate.

[0041] The embodiments of the present application also propose a water gate displacement monitoring system, comprising a processor and a memory, the memory stores a computer program, and the computer program is executed by the processor to realize the steps of the water gate displacement monitoring method as described above.

[0042] The method of the embodiments of the present application can realize long-term and automatic monitoring of the displacement of the water gate and meet the monitoring accuracy requirements by collecting image data of deformation monitoring points on both sides of the water gate at a fixed angle, comparing the collected image data with the initial image to determine the displacement of the deformation monitoring points in the water flow direction, and then converting the displacement of the water gate.

[0043] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0045] Figure 1 The basic flow of the water gate displacement monitoring method of the present embodiment is shown. DETAILED DESCRIPTION

[0046] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown. Like reference numerals can be used to refer to like elements throughout the several embodiments. The drawings are intended to illustrate rather than to limit the present disclosure. It will be understood that the present disclosure can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art.

[0047] The present embodiment proposes a water gate displacement monitoring method, as shown in Figure 1 The method comprises the following steps:

[0048] In step S101, deformation monitoring points are set on the embankments on both sides of the water gate. In some embodiments, the deformation monitoring points can be set on the embankments corresponding to the floodway on both sides of the water outlet of the water gate, and can be set near the water gate. In a specific example, the deformation monitoring points at least include a reference part and a deformation monitoring part which are separately arranged, and the reference part and the deformation monitoring part are connected by an elastic part, so that the reference part hardly deforms due to the elastic connection, while the deformation monitoring part deforms with the deformation of the embankment. The material of the deformation monitoring part is close to that of the embankment.

[0049] In step S102, image data of the deformation monitoring points on both sides of the water gate is collected at a fixed angle according to a set time interval, and the initial image data is retained as a reference image. The image data can be collected by using the original monitoring equipment on the embankment, or fixed monitoring points can be set and image data can be collected by using a patrol device.

[0050] In step S103, a plurality of reference points are extracted from the reference image, and any image data collected thereafter is matched with the reference image based on the reference points. In a specific example, in some examples, the deformation or displacement of the fixed monitoring points in each direction is determined by matching the reference points.

[0051] In step S104, based on the matching result, a deviation between the image data and the reference image is calculated, i.e., the deformation information of the deformation monitoring point is determined by the deviation value.

[0052] In step S105, according to the deviation, a first deformation variable of the deformation monitoring point in the water flow direction is determined. The first deformation variable in the water flow direction is determined according to the component of the deformation information obtained above.

[0053] In step S106, according to the first deformation variable, a displacement range of the water gate is determined. The displacement range of the water gate is determined by mapping the first deformation variable to the deformation of the corresponding gate slot of the gate.

[0054] The method of the embodiments of the present application can realize long-term and automatic monitoring of the displacement of the water gate and meet the monitoring accuracy requirements by acquiring the image data of the deformation monitoring points on both sides of the water gate at a fixed angle, comparing the acquired image data with the initial image to determine the displacement of the deformation monitoring point in the water flow direction, and then converting the displacement of the water gate.

[0055] In some embodiments, the method further includes: obtaining an actual pulling amount of each time the gate is lifted; and a gate height of the gate at the actual pulling amount. In a specific example, the actual pulling amount can be obtained by the actual pulling amount of the pulling machine, and the gate height can be obtained by a position sensor of the gate lifting.

[0056] According to the actual pulling amount and the gate height of each time, the displacement of the gate in the water flow direction before and after each time the gate is lifted can be calculated. The actual pulling amount and the gate height can be regarded as an approximate triangle, and the minimum side of the triangle is the displacement of the gate in the water flow direction before and after each time the gate is lifted.

[0057] The displacement of each time and the displacement range are taken as the total displacement range of the water gate. The present application can effectively supplement the data amount of the gate displacement monitoring and improve the accuracy of the automatic monitoring by monitoring the displacement of the deformation monitoring point and the possible movement range of the gate itself, because the water gate may have a small displacement due to the impact of the water flow during the opening process.

[0058] In some embodiments, extracting a plurality of reference points from the reference image includes:

[0059] The profile information of the reference part is extracted, i.e., the outer contour line of the reference part.

[0060] Further, a plurality of reference points are determined in a region outside the specified pixel distance from the reference part of the deformation monitoring part, the determined reference points are distributed in the deformation monitoring part, and there are multiple groups of reference points along the water flow direction, and the multiple groups of reference points are arranged staggered. Determining the multiple groups of reference points in the region outside the specified pixel distance from the reference part can make the distance between the points as long as possible in subsequent examples, thereby reducing the matching error caused by the shorter pixel distance.

[0061] In some embodiments, matching any image data collected later based on the reference points with the reference image includes:

[0062] Establishing a distance relationship between the contour information of the reference image and each reference point, for example, a certain number of reference points can be selected in the line of the contour information, and the reference points and the reference points are connected, thereby establishing the distance relationship.

[0063] Extracting the contour information of the reference part of any image data collected later.

[0064] According to the contour information collected later, the distance relationship is mapped into the any image data, that is, the distance relationship formed in the original reference image is directly mapped into any image data based on the contour information of the reference part that does not produce deformation.

[0065] Extracting image features in a fixed range of each reference point in the reference image and the any image data to compare the extracted image features. For example, a 50*50 pixel range of the reference point can be selected for feature comparison, and the specific range can be set according to actual needs.

[0066] In some embodiments, establishing a distance relationship between the contour information of the reference image and each reference point includes:

[0067] Selecting reference points along the contour information of the reference image, and determining the pixel distance between the reference points and any reference point, that is, determining the pixel distance of the connecting line segment between the reference points and any reference point.

[0068] Adjusting the position of the selected reference points so that each reference point matches a reference point, and the pixel distance between the matched reference points is within a set distance range. By changing the position of the reference points or connecting them with other reference points, the pixel distance between the reference points and the reference points is changed. The present application controls the pixel distance within the set distance range, so as to control the possible error of the mapped pixel distance to be similar, thereby improving the monitoring accuracy.

[0069] In some embodiments, comparing the extracted image features includes:

[0070] The similarity between the image features within a fixed range corresponding to each pair of reference points is calculated. The similarity between the image features within a fixed range is introduced to further highlight the feature deviation caused by the possible shift.

[0071] According to the calculated similarity and the reference points, at least one first path of the similarity change is determined along the water flow direction, and the first path is formed by connecting at least two reference points. The selected first path can include at least one point with the maximum similarity as a base point, and other reference points with different similarities are distributed on the first path.

[0072] In some embodiments, based on the matching result, calculating the deviation between the image data and the reference image includes:

[0073] Based on the reference image and the image data, local images of a fixed range corresponding to the reference points with the similarity change in the first path are extracted.

[0074] The two local images are overlapped, and the transparency of any one of the local images is adjusted.

[0075] Any one of the local images is shifted, the definition of the overlapped region after the shift is calculated, and the shift amount and the shift position that maximize the definition of the overlapped region are recorded to determine the deviation. For the case without deformation or displacement, changing the transparency of any one of the local images after the overlap of the two local images does not change the definition, and in the case of different calculated similarities, the possible deformation condition (i.e., the recorded shift amount and shift position) is determined by small-range position shift.

[0076] In some embodiments, according to the deviation, determining a first deformation amount of the deformation monitoring point in the water flow direction includes:

[0077] According to the recorded shift amount and shift position, a second path after deformation is constructed. In a specific example, the shift condition corresponding to the deformation condition can be used to determine the actual position of any one of the reference points after deformation, thereby constructing the second path.

[0078] The position deviation between the second path and the first path is calculated. For example, the original first path is a straight line along the water flow direction, but according to the monitored deviation, the length of the straight line is increased, or there is a bending condition, which indicates that the dam body may have displacement or deformation.

[0079] The position deviation is mapped to the water flow direction to obtain the first deformation amount. The embodiments of the present application are directed to displacement monitoring of the water gate, and the position deviation is mapped to the water flow direction to obtain the possible deformation amount of the dam body in the flow direction.

[0080] In some embodiments, determining the displacement range of the water gate according to the first deformation variable comprises:

[0081] Obtaining a transverse width of a gate slot of the water gate, in a specific example, in the absence of a gate slot, a fixed initial gate slot width can be set according to the width of the gate.

[0082] Determining the displacement range of the water gate according to a proportional relationship between the first deformation variable and the transverse width.

[0083] The method of the present application monitors the possible deformation of the dam body in the flow direction through the deformation monitoring point, so as to further judge the possible displacement amount of the water gate. The method of the present application can realize the monitoring of the displacement of the water gate without increasing other equipment, and realizes the long-term and automatic monitoring of the gate by reusing the existing facilities and equipment.

[0084] The embodiments of the present application also propose a water gate displacement monitoring system, comprising a processor and a memory, the memory stores a computer program, and the computer program is executed by the processor to realize the steps of the water gate displacement monitoring method as described above.

[0085] In addition, although the exemplary embodiments have been described herein, the scope of the present disclosure includes any and all embodiments having equivalent elements, modifications, omissions, combinations (for example, solutions cross various embodiments), adaptations, or alterations based on the present disclosure. Not limited to the examples described in the specification or during the implementation of the present application, the examples will be interpreted as non-exclusive.

[0086] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more aspects thereof) can be used in combination with each other. Other embodiments can be used by those of ordinary skill in the art upon reading the above description.

[0087] The above embodiments are only exemplary embodiments of the present disclosure, and those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present disclosure, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the present application.

Claims

1. A method of monitoring displacement of a water gate, characterized by, The method comprises the following steps: Setting deformation monitoring points on the dam on both sides of the water gate in advance; Collecting image data of the deformation monitoring points on both sides of the water gate at fixed angles at set time intervals, and retaining initial image data as a reference image; Extracting a plurality of reference points from the reference image, and matching any subsequently collected image data with the reference image based on the reference points; Calculating deviation between the image data and the reference image based on the matching result; Determining a first deformation variable of the deformation monitoring points in the water flow direction according to the deviation; Determining a displacement range of the water gate according to the first deformation variable; The matching of any subsequently collected image data with the reference image based on the reference points comprises: Establishing a distance relationship between the reference image and each reference point; Extracting contour information of a reference part of any subsequently collected image data; Mapping the distance relationship to the any subsequently collected image data according to the contour information; Extracting image features of a fixed range of each reference point in the reference image and the any subsequently collected image data for comparison using the extracted image features; The calculation of deviation between the image data and the reference image based on the matching result comprises: Extracting local images of a fixed range of a reference point pair with a change in similarity in a first path from the reference image to the image data; Overlapping the two local images and adjusting the transparency of any of the local images; Shifting any of the local images, calculating the definition of the overlapped part after the shift, and recording the shift amount and shift position that maximize the definition of the overlapped part to determine the deviation; The comparison using the extracted image features comprises: Calculating the similarity between image features in a fixed range of each pair of reference points; Determining at least one first path with a change in similarity in the water flow direction according to the calculated similarity and each group of reference points, the first path being formed by connecting at least two reference points.

2. The water gate displacement monitoring method according to claim 1, wherein Further comprising: Obtaining an actual pulling amount of each gate opening, and a gate height of the gate under the actual pulling amount; Calculating the displacement of the gate in the water flow direction before and after each gate opening according to the actual pulling amount and the gate height of each time; Taking the displacement of each time and the displacement range as the total displacement range of the water gate.

3. The water gate displacement monitoring method according to claim 1, wherein The deformation monitoring points comprise at least a reference part and a deformation monitoring part arranged separately; The extraction of a plurality of reference points from the reference image comprises: Extracting contour information of the reference part, and determining a plurality of distributed reference points from an area of the deformation monitoring part that is a specified pixel distance away from the reference part, the determined reference points being distributed in the deformation monitoring part and having a plurality of groups of reference points arranged staggered in the water flow direction.

4. The water gate displacement monitoring method of claim 1, wherein, The establishment of a distance relationship between the reference image and each reference point comprises: Selecting a reference point along the contour information of the reference image, and determining the pixel distance between the reference point and any reference point; The selected reference point positions are adjusted so that each reference point matches a reference point, and the pixel distance between the matched reference point is within a set distance range.

5. The water gate displacement monitoring method of claim 1, wherein, According to the deviation, determining a first deformation variable of the deformation monitoring point in the water flow direction comprises: According to the recorded offset and the offset position, a second path after deformation is constructed; Calculating the position deviation between the second path and the first path; Mapping the position deviation to the water flow direction to obtain the first deformation variable.

6. The water gate displacement monitoring method of claim 1, wherein, According to the first deformation variable, determining the displacement range of the water gate comprises: Obtaining the lateral width of the gate slot of the water gate; According to the proportional relationship between the first deformation variable and the lateral width, determining the displacement range of the water gate.

7. A water gate displacement monitoring system, characterized by, The computer program is stored on the memory and is executed by the processor to implement the steps of the water gate displacement monitoring method according to any one of claims 1 to 6.

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