CN113091622A - Dam displacement and inclination angle measuring method and system - Google Patents
Dam displacement and inclination angle measuring method and system Download PDFInfo
- Publication number
- CN113091622A CN113091622A CN202110199276.7A CN202110199276A CN113091622A CN 113091622 A CN113091622 A CN 113091622A CN 202110199276 A CN202110199276 A CN 202110199276A CN 113091622 A CN113091622 A CN 113091622A
- Authority
- CN
- China
- Prior art keywords
- displacement
- dam
- marker
- initial
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/03—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring coordinates of points
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a dam displacement and inclination angle measuring method and system, which are characterized in that markers are preset, initial images and real-time images of the markers are obtained, the current displacement and inclination angle of a dam are calculated by analyzing the changes of characteristic lines in the initial images and the real-time images, and millimeter-level measuring accuracy is realized by using cheap hardware equipment.
Description
Technical Field
The invention relates to the technical field of displacement and inclination angle measurement, in particular to a dam displacement and inclination angle measurement method and system.
Background
The measurement of deformation characteristics such as displacement, inclination angle and the like of the reservoir dam is important content of dam safety monitoring, is related to life and property safety of people, provides reasonable and effective displacement deformation monitoring and early warning, and can perform danger-eliminating reinforcement on the dam before danger occurs, so that economic loss and safety threat caused by the danger are greatly reduced.
The existing reservoir dam displacement and dip angle measurement mainly comprises the following five methods:
and (6) manually observing by using a total station. Marked points with obvious characteristics are arranged at important positions of the dam body of the reservoir dam, and the three-dimensional geodetic coordinates of the marked points are measured by using a total station in a certain time period, so that the displacement amounts of the marked points in the X direction (the weft direction), the Y direction (the warp direction) and the Z direction (the direction perpendicular to the horizontal plane) relative to the initial position are obtained. The measurement precision of the method can reach millimeter level generally, and the method has the defects of manual operation, higher requirement on the professional skills of technicians, longer monitoring period and insufficient timeliness.
GNSS or GPS fix point observations. The GPS receiver is placed at a fixed position on the observation target, and the three-dimensional coordinates of the fixed point can be continuously transmitted to the server in real time. The method has the defects that the positioning accuracy is generally centimeter-level, the requirement of millimeter-level measurement accuracy of reservoir dam displacement is difficult to meet, and in addition, a reference station is needed to correct the coordinates of the GPS receiver nearby. The price of the equipment is also not cheap, and about 3 to 5 ten thousand yuan is required for each equipment.
The interferometric synthetic aperture radar (InSAR) of the space base or the foundation has the advantage that the morphological characteristics of the whole dam body surface can be obtained, so that the measurement of deformation characteristics such as displacement, dip angle and the like is more comprehensive. The defects are that the price is very expensive, for example, the ground InSAR equipment generally needs dozens of thousands of yuan, the cost performance is not high, and the ground InSAR equipment is difficult to be widely applied to numerous medium and small earth-rock dams. Moreover, the measurement accuracy of the technology for displacement can only reach centimeter level generally.
Unmanned airborne or ground-based LIDAR (abbreviated LIDAR), which has similar advantages and disadvantages as InSAR technology and is also weather sensitive compared to InSAR. Ground-based LIDAR equipment also generally needs dozens of ten thousand yuan, and the precision can only reach centimeter level.
The displacement sensor is fixed on an observation target through the telescopic chain-shaped sensor, the other end of the telescopic chain needs to be fixed on a relatively stable fixed object, when the two ends of the chain are displaced, the sensor can sensitively capture the displacement, the precision can reach a millimeter level, and the price of the equipment is very cheap and is generally hundreds of yuan. However, the displacement of the dam often causes the displacement of the surrounding environment, so the fixture is very difficult to find in a small range around the dam, and the length of the chain cannot extend infinitely, so that the method has certain limitations.
Disclosure of Invention
In view of the above problems, the present invention is directed to a method and system for measuring dam displacement and inclination with low cost and high accuracy.
In order to solve the technical problem, the invention provides a dam displacement and inclination angle measuring method in a first aspect, which comprises the following steps:
acquiring an initial image and a real-time image of the marker;
calculating initial centroid coordinates of the markers according to actual shapes of the markers contained in the initial image, calculating horizontal direction resolution and vertical direction resolution of the initial image according to pixels occupied by the characteristic lines contained in the initial image and preset sizes of the markers, and calculating initial slopes of the characteristic lines contained in the initial image;
calculating the current centroid coordinate of the marker according to the actual shape of the marker contained in the real-time image, and calculating the current slope of the characteristic line contained in the real-time image;
the initial centroid coordinate and the current centroid coordinate are subjected to difference to respectively obtain the current pixel horizontal displacement and the current pixel vertical displacement of the marker, and the current horizontal displacement and the current pixel vertical displacement of the dam are obtained by multiplying the horizontal direction resolution and the vertical direction resolution by the pixel horizontal displacement and the pixel vertical displacement respectively; and calculating the current inclination angle of the dam according to the initial slope and the current slope.
In some embodiments, the method further includes setting different levels of early warning values for the horizontal displacement, the vertical displacement and the inclination angle according to dam safety monitoring industry standards.
In some embodiments, the method further comprises calculating the speed and acceleration of the dam displacement according to the horizontal displacement and the vertical displacement in unit time.
In some embodiments, the method further comprises the step of arranging an observation pier at each of the center position of the dam crest of the dam and the center position of the revetment, wherein the front surface of the observation pier and the section of the dam are kept parallel, and the identifier is arranged on the front surface of the observation pier.
In some embodiments, the observation pier is a stone pier which is cast vertically downwards by using reinforced concrete and has a depth of at least 30cm, and the ground on both sides of the stone pier is cast with concrete by using a triangular fixing device respectively.
In some embodiments, the marker is a diamond-shaped square, the horizontal diagonal and the horizontal plane of the diamond-shaped square are parallel, and the horizontal diagonal and the vertical diagonal of the diamond-shaped square have equal lengths.
In some embodiments, after the acquiring the initial image and the real-time image of the marker, the method further includes performing binarization processing and noise removal processing on the initial image and the real-time image, respectively.
In some embodiments, the method further comprises the steps of arranging fixed places outside the dam body on two sides of the dam, wherein the fixed places are stone piers with the depth of at least 30cm and are poured downwards vertically by using reinforced concrete, and installing observation devices for acquiring initial images of the markers and acquiring real-time images of the markers at the fixed places.
In some embodiments, the observation device comprises a telescope and a camera, the focal lengths of the objective lens and the eyepiece of the telescope are adjusted in sequence until the marker is clearly imaged, and then the camera is aligned with the eyepiece of the telescope.
In a second aspect, the present invention provides a dam displacement and inclination angle measuring system, including:
the observation device is used for acquiring an initial image and a real-time image of the marker;
the initial image feature analysis device is used for calculating an initial centroid coordinate of the marker according to the actual shape of the marker contained in the initial image, calculating the horizontal resolution and the vertical resolution of the initial image according to the pixel occupied by the feature line contained in the initial image and the preset size of the marker, and calculating the initial slope of the feature line contained in the initial image;
the real-time image feature analysis device is used for calculating the current centroid coordinate of the marker according to the actual shape of the marker contained in the real-time image and calculating the current slope of the feature line contained in the real-time image;
the displacement and inclination angle analysis device is used for making a difference between the initial centroid coordinate and the current centroid coordinate to respectively obtain the current pixel horizontal displacement and the current pixel vertical displacement of the marker, and respectively multiplying the pixel horizontal displacement and the pixel vertical displacement by the horizontal direction resolution and the vertical direction resolution to obtain the current horizontal displacement and the current vertical displacement of the dam; and calculating the current inclination angle of the dam according to the initial slope and the current slope.
The invention has the beneficial effects that: the method comprises the steps of presetting a marker, acquiring an initial image and a real-time image of the marker, calculating the current displacement and inclination angle of the dam by analyzing the change of characteristic lines in the initial image and the real-time image, and realizing millimeter-scale measurement accuracy by using cheap hardware equipment.
Drawings
FIG. 1 is a schematic view of the installation positions of an observation pier and a fixed site;
FIG. 2 is a schematic diagram showing a marker arrangement position of the marker;
FIG. 3 is an enlarged partial schematic view of the marker;
FIG. 4 is a schematic flow chart illustrating a dam displacement and inclination angle measurement method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dam displacement and inclination angle measuring system according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the following detailed description of the present invention is provided with reference to the accompanying drawings and detailed description. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Before observation, the following preparation work is required:
as shown in fig. 1, the arrangement positions of the observation pier and the fixed place are shown, as shown in fig. 2, the arrangement position of the marker is shown, firstly, one observation pier 2 is respectively arranged at the center position of the top of the dam 1 and the center position of the revetment, as can be seen from fig. 1, three observation piers 2 are arranged on the dam 1, the front surfaces of the observation piers 2 and the section of the dam 1 are kept parallel, and the marker 5 is arranged on the front surfaces of the observation piers 2. The observation pier 2 is a stone pier which is vertically poured downwards by using reinforced concrete and has the depth of at least 30cm, and the ground surfaces on the two sides of the stone pier are respectively poured with concrete to form a triangular fixing device (not shown in the figure) so as to ensure that the marker 5 and the dam 1 body do not move relatively. The marker is a diamond square, the horizontal diagonal line and the horizontal plane of the diamond square are kept parallel, and the horizontal diagonal line of the diamond square and the vertical diagonal line of the diamond square are equal in length.
Specifically, as shown in fig. 3, the markers 5 are partially enlarged, and a square white background 4 with a size of 300mm x 300mm is coated on the front surface of the stone pier by using a permanent white pigment as the background of the markers 5. A diamond square is drawn with permanent red pigment in the center of the white background 4, and the horizontal diagonal and the horizontal plane of the diamond square are required to be parallel, and the length of the horizontal diagonal and the vertical diagonal is 100 mm.
Then, fixed sites 3 are arranged outside the dam body on two sides of the dam, the fixed sites 3 are stone piers with the depth of at least 30cm which are vertically poured downwards by using reinforced concrete, and an observation device used for acquiring the initial image of the marker 5 and acquiring the real-time image of the marker is arranged on the fixed sites, so that the observation device and the fixed sites can not generate relative movement.
Specifically, outside the dam body on both sides of the dam 1, an appropriate position (an appropriate position means that the observation device needs to be installed without barrier with the marker 5) is selected. The reinforced concrete stone pier is poured from a certain depth on the ground, and an iron base (not shown) can be inserted into the concrete during the pouring process and is stable after being formed, so that the cement pouring amount is reduced. The telescope is arranged on an iron base and is reinforced by screws and nuts to finish the reinforcing work.
Example one
As shown in fig. 4, the present embodiment provides a dam displacement and inclination angle measurement method, including the following steps:
acquiring an initial image and a real-time image of a marker through an observation device;
the observation device comprises a telescope and a camera, the observation angle and the focal length of an objective lens and an eyepiece of the telescope are sequentially adjusted until an operator can clearly image the marker observed from the objective lens, and then the camera is aligned with the eyepiece of the telescope to enable the characteristic line of the marker to appear in the camera. More specifically, the observation angle of the telescope is adjusted, so that the visual field of the telescope is just aligned to a white background area on a target stone pier, and the focal lengths of the objective lens and the eyepiece of the telescope are adjusted in sequence, so that the cross diagonal of the red diamond square is imaged clearly. After the camera is aligned with the eyepiece of the telescope, the camera is fixed on an iron base by screws and nuts.
Preferably, an iron box for protection is covered on the iron base, and the screw and the nut are screwed. Among five surfaces of the iron box, the surface positioned in the observation direction of the telescope is made of transparent toughened glass material.
After the initial image and the real-time image of the marker are obtained, the method further comprises the step of carrying out binarization processing and noise removal processing on the initial image and the real-time image respectively.
And (3) binarization processing: since the line of the diamond square is red and the background is white, the following condition is satisfied when the gray value of a certain pixel in the image simultaneously: when the gray value of the red wave band is larger than 205, the gray value of the green wave band is smaller than 50 and the gray value of the blue wave band is smaller than 50, the gray value is detected as target characteristic information, and the value of the pixel is set to be 1; when this condition is not satisfied, the value of the pixel is set to 0.
And (3) noise removal processing: because there may be non-target features satisfying the feature extraction condition in the field of view of the camera, denoising processing needs to be performed based on the binary image according to the geometric morphology features. The area characteristic of the object is obtained by adopting a seed point region growing algorithm, and the specific steps are as follows: traversing the whole image, adding a traversal identifier to a pixel with a first value of 1, simultaneously recording the (x, y) image coordinates of the pixel, and then judging whether the value of an 8-neighborhood of the pixel is 1; for all the adjacent pixels with the value of 1, the same iteration step is carried out, but the pixels with the traversal identification do not participate in the iteration; stopping the search of the single object until no neighboring pixels have a value of 1; calculating the total number of the pixels searched in the process; storing all the pixels searched at this time as an object, and recording the number of the pixels of the object and the image coordinates of all the pixels; after the whole image is traversed, taking the object with the largest pixel number as a target characteristic object, and taking all the other objects as noise objects; the gray values of all pixels included in the noise object are set to 0.
Step two, the server receives the initial image and the real-time image from the observation device, calculates the initial centroid coordinate of the marker according to the actual shape of the marker contained in the initial image, calculates the horizontal resolution and the vertical resolution of the initial image according to the pixel occupied by the characteristic line contained in the initial image and the preset size of the marker, and calculates the initial slope of the characteristic line contained in the initial image;
the real-time picture acquired by the camera is transmitted to the server in a wired or wireless transmission mode to serve as hardware equipment for data analysis and processing, and the server captures images in the video information of the camera for processing and analysis in a preset time period. The unattended automatic continuous monitoring is realized, so that the actual application requirements are met.
Calculating the actual shape of the marker contained in the initial image in the second step: this step is actually to obtain the coordinates of each vertex in the initial state of the marker. The image coordinates of the 4 corner points A, B, C, D of the diamond-shaped square included in the initial image, including X and Y coordinates, in units of pixels, are extracted. For all pixels of which the median value of the denoised binary image is 1, the pixel point with the minimum x coordinate is the point A, the pixel point with the maximum x coordinate is the point C, the pixel point with the minimum y coordinate is the point B, and the pixel point with the maximum y coordinate is the point D.
Calculating the initial centroid coordinates in the step two: for the first imaging (i.e., the initial image), the image coordinates (X, Y) of the 4 corner points need to be saved as the initial state of displacement and tilt measurement. Let the initial image coordinates of the 4 feature points be (x) respectively1,y1)、(x2,y2)、(x3,y3)、(x4,y4) The average horizontal coordinate and the average vertical coordinate of the two can be respectively calculated as
As the image coordinates of the diamond shaped square where the centroid is located.
Calculating the horizontal direction resolution and the vertical direction resolution in the second step: the resolution of the initial image characterizes the actual length represented by a single pixel in the initial image. Firstly, calculating the image distance L of an AC line segment and a BD line segment on an image in pixel unit1And L2The distance calculation formula is as follows:
since it is known in the setting process that the actual lengths of the diagonals of the diamond-shaped squares are all 100mm, the horizontal direction resolution R of the image1＝100/L1Mm, vertical resolution of the image is R2＝100/L2And (4) millimeter.
For example, if the distance of the AC line segment on the image is 1000 pixels, then R1100/1000 ═ 0.1 mm. In the present invention, the image resolution simultaneously characterizes the accuracy of the displacement measurement.
Step two, calculating the initial slope of the characteristic line contained in the initial image:
calculating the current centroid coordinate of the marker according to the actual shape of the marker contained in the real-time image, and calculating the current slope of the characteristic line contained in the real-time image;
step three, calculating the actual shape of the marker contained in the real-time image: this step is actually obtaining the coordinates of each vertex of the current state of the marker. The coordinates of the current corner point of the 4 feature points are extracted as (x, y ″), respectively1)、(x＇2,y＇2)、(x＇3,y＇3)、(x＇4,y＇4) The average horizontal coordinate and the average vertical coordinate of the two can be respectively calculated as
I.e. the current centroid coordinates of the diamond-shaped squares in this measurement.
Step three, the current slope of the characteristic line contained in the real-time image:
step four, making a difference between the initial centroid coordinate and the current centroid coordinate to respectively obtain the current pixel horizontal displacement and the current pixel vertical displacement of the marker, and respectively multiplying the pixel horizontal displacement and the pixel vertical displacement by the horizontal resolution and the vertical resolution to obtain the current horizontal displacement and the current vertical displacement of the dam; and calculating the current inclination angle of the dam according to the initial slope and the current slope.
Fourthly, calculating the current horizontal displacement and the vertical displacement of the dam: for the real-time image relative to the initial image, the horizontal displacement of the dam body along the section and the overall vertical displacement can be calculated by the following formula:
step four, calculating the current inclination angle of the dam: and calculating an included angle between the initial AC line segment and the AC line segment measured this time on the image, wherein the included angle is the actually generated inclination angle. The specific calculation process is as follows: if the included angle between the two line segments is alpha, the following steps are provided:
calculating the inclination angles of the five line segments of AB, AC, AD, BC and CD in sequence, taking the average value of the inclination angles as the actually generated inclination angle value, and converting the angle unit from radian into angle:
θ＝180/π·α
the method presets the marker, obtains the initial image and the real-time image of the marker, calculates the current displacement and the inclination angle of the dam by analyzing the change of the characteristic lines in the initial image and the real-time image, and realizes the millimeter-level measurement precision by using cheap hardware equipment.
Preferably, according to the dam safety monitoring industry standard, different levels of early warning values are set for the horizontal displacement, the vertical displacement and the inclination angle according to the size. For example, a horizontal displacement of 3mm, 10mm, 20mm corresponds to a slight displacement, a significant displacement, and a severe displacement, respectively. Similarly, different warning levels can be marked according to the size of the inclination angle value.
Preferably, the speed and the acceleration of the displacement of the dam are calculated according to the variables of the horizontal displacement and the vertical displacement in unit time, and the calculated speed and the acceleration serve as auxiliary information of safety detection.
Example two
As shown in fig. 5, a dam displacement and inclination measuring system includes:
the observation device is used for acquiring an initial image and a real-time image of the marker;
the initial image feature analysis device is used for calculating an initial centroid coordinate of the marker according to the actual shape of the marker contained in the initial image, calculating the horizontal resolution and the vertical resolution of the initial image according to the pixel occupied by the feature line contained in the initial image and the preset size of the marker, and calculating the initial slope of the feature line contained in the initial image;
the real-time image feature analysis device is used for calculating the current centroid coordinate of the marker according to the actual shape of the marker contained in the real-time image and calculating the current slope of the feature line contained in the real-time image;
the displacement and inclination angle analysis device is used for making a difference between the initial centroid coordinate and the current centroid coordinate to respectively obtain the current pixel horizontal displacement and the current pixel vertical displacement of the marker, and respectively multiplying the pixel horizontal displacement and the pixel vertical displacement by the horizontal resolution and the vertical resolution to obtain the current horizontal displacement and the current vertical displacement of the dam; and calculating the current inclination angle of the dam according to the initial slope and the current slope.
In this embodiment, the devices included in the system may be arranged according to the example of the first embodiment.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A dam displacement and inclination angle measurement method is characterized by comprising the following steps:
acquiring an initial image and a real-time image of the marker;
calculating initial centroid coordinates of the markers according to actual shapes of the markers contained in the initial image, calculating horizontal direction resolution and vertical direction resolution of the initial image according to pixels occupied by the characteristic lines contained in the initial image and preset sizes of the markers, and calculating initial slopes of the characteristic lines contained in the initial image;
calculating the current centroid coordinate of the marker according to the actual shape of the marker contained in the real-time image, and calculating the current slope of the characteristic line contained in the real-time image;
the initial centroid coordinate and the current centroid coordinate are subjected to difference to respectively obtain the current pixel horizontal displacement and the current pixel vertical displacement of the marker, and the current horizontal displacement and the current pixel vertical displacement of the dam are obtained by multiplying the horizontal direction resolution and the vertical direction resolution by the pixel horizontal displacement and the pixel vertical displacement respectively; and calculating the current inclination angle of the dam according to the initial slope and the current slope.
2. The dam displacement and inclination angle measuring method according to claim 1, further comprising setting different levels of early warning values for the horizontal displacement amount, the vertical displacement amount and the inclination angle according to dam safety monitoring industry standards.
3. The dam displacement and inclination angle measuring method according to claim 1, further comprising calculating dam displacement speed and acceleration from the horizontal displacement amount and the vertical displacement amount per unit time.
4. The dam displacement and inclination angle measurement method according to claim 1, further comprising arranging an observation pier at each of a center position of a dam crest of the dam and a center position of the revetment, wherein a front surface of the observation pier and a section of the dam are kept parallel, and the marker is arranged on the front surface of the observation pier.
5. The dam displacement and inclination angle measuring method according to claim 4, wherein the observation pier is a stone pier vertically cast downward with a depth of at least 30cm using reinforced concrete, and the ground on both sides of the stone pier is respectively cast with a triangular fixing means using concrete.
6. The dam displacement and inclination measurement method according to claim 4, wherein the marker is a diamond-shaped square, the horizontal diagonal line and the horizontal plane of the diamond-shaped square are kept parallel, and the horizontal diagonal line of the diamond-shaped square and the vertical diagonal line of the diamond-shaped square have the same length.
7. The dam displacement and inclination angle measurement method according to claim 1, wherein after the initial image and the real-time image of the marker are acquired, further comprising performing binarization processing and noise removal processing on the initial image and the real-time image, respectively.
8. The dam displacement and inclination angle measuring method according to claim 1, further comprising setting fixed sites outside the dam body at both sides of the dam, the fixed sites being stone piers vertically cast downward with reinforced concrete to a depth of at least 30cm, and installing observation devices for acquiring initial images of the markers and acquiring real-time images of the markers at the fixed sites.
9. The dam displacement and inclination measurement method according to claim 8, wherein the observation device comprises a telescope and a camera, the focal lengths of the objective lens and the eyepiece of the telescope are adjusted in sequence until the marker is imaged clearly, and then the camera is aligned with the eyepiece of the telescope.
10. A dam displacement and inclination measurement system comprising:
the observation device is used for acquiring an initial image and a real-time image of the marker;
the initial image feature analysis device is used for calculating an initial centroid coordinate of the marker according to the actual shape of the marker contained in the initial image, calculating the horizontal resolution and the vertical resolution of the initial image according to the pixel occupied by the feature line contained in the initial image and the preset size of the marker, and calculating the initial slope of the feature line contained in the initial image;
the real-time image feature analysis device is used for calculating the current centroid coordinate of the marker according to the actual shape of the marker contained in the real-time image and calculating the current slope of the feature line contained in the real-time image;
the displacement and inclination angle analysis device is used for making a difference between the initial centroid coordinate and the current centroid coordinate to respectively obtain the current pixel horizontal displacement and the current pixel vertical displacement of the marker, and respectively multiplying the pixel horizontal displacement and the pixel vertical displacement by the horizontal direction resolution and the vertical direction resolution to obtain the current horizontal displacement and the current vertical displacement of the dam; and calculating the current inclination angle of the dam according to the initial slope and the current slope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110199276.7A CN113091622B (en) | 2021-02-22 | 2021-02-22 | Dam displacement and inclination angle measuring method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110199276.7A CN113091622B (en) | 2021-02-22 | 2021-02-22 | Dam displacement and inclination angle measuring method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113091622A true CN113091622A (en) | 2021-07-09 |
| CN113091622B CN113091622B (en) | 2022-12-06 |
Family
ID=76666230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110199276.7A Active CN113091622B (en) | 2021-02-22 | 2021-02-22 | Dam displacement and inclination angle measuring method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113091622B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441138A (en) * | 2016-10-12 | 2017-02-22 | 中南大学 | Deformation monitoring method based on vision measurement |
| CN106843493A (en) * | 2017-02-10 | 2017-06-13 | 深圳前海大造科技有限公司 | A kind of augmented reality implementation method of picture charge pattern method and application the method |
| CN108280969A (en) * | 2018-01-11 | 2018-07-13 | 中铁第四勘察设计院集团有限公司 | A kind of high slope surface deformation monitoring and warning system and its method for early warning |
| CN108830899A (en) * | 2018-06-04 | 2018-11-16 | 哈尔滨工业大学 | A kind of center of circle detection method that the quick self-adapted angle point based on geometrical characteristic combines |
| CN109035326A (en) * | 2018-06-19 | 2018-12-18 | 北京理工大学 | High-precision location technique based on sub-pix image recognition |
| CN111469882A (en) * | 2020-06-08 | 2020-07-31 | 青岛瑞捷轨道科技有限公司 | Use method of portable modular self-correcting rail three-dimensional detection system |
| CN111947578A (en) * | 2020-07-21 | 2020-11-17 | 上海同禾工程科技股份有限公司 | Structure displacement measuring system and measuring method thereof |
| CN111986238A (en) * | 2020-08-03 | 2020-11-24 | 长江勘测规划设计研究有限责任公司 | Concrete arch dam modal shape identification method based on unmanned aerial vehicle video shooting |
-
2021
- 2021-02-22 CN CN202110199276.7A patent/CN113091622B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441138A (en) * | 2016-10-12 | 2017-02-22 | 中南大学 | Deformation monitoring method based on vision measurement |
| CN106843493A (en) * | 2017-02-10 | 2017-06-13 | 深圳前海大造科技有限公司 | A kind of augmented reality implementation method of picture charge pattern method and application the method |
| CN108280969A (en) * | 2018-01-11 | 2018-07-13 | 中铁第四勘察设计院集团有限公司 | A kind of high slope surface deformation monitoring and warning system and its method for early warning |
| CN108830899A (en) * | 2018-06-04 | 2018-11-16 | 哈尔滨工业大学 | A kind of center of circle detection method that the quick self-adapted angle point based on geometrical characteristic combines |
| CN109035326A (en) * | 2018-06-19 | 2018-12-18 | 北京理工大学 | High-precision location technique based on sub-pix image recognition |
| CN111469882A (en) * | 2020-06-08 | 2020-07-31 | 青岛瑞捷轨道科技有限公司 | Use method of portable modular self-correcting rail three-dimensional detection system |
| CN111947578A (en) * | 2020-07-21 | 2020-11-17 | 上海同禾工程科技股份有限公司 | Structure displacement measuring system and measuring method thereof |
| CN111986238A (en) * | 2020-08-03 | 2020-11-24 | 长江勘测规划设计研究有限责任公司 | Concrete arch dam modal shape identification method based on unmanned aerial vehicle video shooting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113091622B (en) | 2022-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113345019B (en) | Method, equipment and medium for measuring potential hazards of transmission line channel target | |
| CN106683089B (en) | Tower deformation detection method with constraint registration | |
| Li et al. | A real-time 3D scanning system for pavement distortion inspection | |
| CN111895911B (en) | Method for monitoring hidden danger of ground collapse of shallow sand layer | |
| CN107064169B (en) | Bridge crack detection device and detection method | |
| CN109297428A (en) | A kind of high-precision deformation based on unmanned plane patrols survey technology method | |
| CN111473776A (en) | Landslide crack monitoring method based on single-image close-range photogrammetry | |
| CN111457848B (en) | Method and system for measuring displacement through coordinate change between adjacent monitoring points | |
| CN113223087B (en) | Target object geographic coordinate positioning method and device based on video monitoring | |
| Yang et al. | High-precision vision sensor method for dam surface displacement measurement | |
| CN113240887A (en) | Slope rockfall collapse monitoring method, device and equipment | |
| CN111047633B (en) | Monocular distance measuring device | |
| CN203824548U (en) | Bridge structure concrete surface observation area measuring instrument | |
| CN116989679A (en) | Highway high slope displacement integrated monitoring method based on image processing | |
| CN116399302A (en) | Method for monitoring dynamic compaction settlement in real time based on binocular vision and neural network model | |
| Naumann et al. | Accuracy comparison of digital surface models created by unmanned aerial systems imagery and terrestrial laser scanner | |
| CN113091622B (en) | Dam displacement and inclination angle measuring method and system | |
| CN114943890A (en) | Transformer substation field flatness identification method adopting unmanned aerial vehicle-mounted laser point cloud | |
| Cai et al. | Methods for long-distance crack location and detection of concrete bridge structures | |
| CN112595719B (en) | Pavement disease fine detection method based on three-dimensional laser scanning technology | |
| CN113074635A (en) | Calibration bolt and method for detecting bolt loosening by using same | |
| CN116839539A (en) | Automatic monitoring and measuring system for tunnel engineering construction | |
| KR20060018909A (en) | Dynamic movement measuring system for structure based on image processing for diagnosing and monitoring construction | |
| Camp et al. | Large structures: which solutions for health monitoring? | |
| JP5429493B2 (en) | Investment plan evaluation method for rainfall observation facilities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |