CN115809973A - Storage tank deformation detection method and device, electronic equipment and storage medium - Google Patents
Storage tank deformation detection method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention provides a storage tank deformation detection method, a storage tank deformation detection device, electronic equipment and a storage medium, wherein the method comprises the following steps: scanning the outline of the storage tank to be detected and the substrate surface of the storage tank to be detected to obtain outline point cloud data and substrate surface point cloud data, and constructing a storage tank model and the substrate surface in a coordinate system according to the outline point cloud data and the substrate surface point cloud data; taking a plane vertical to the Z axis as a slicing plane, performing equidistant cutting on the storage tank model to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle; the method has the advantages that the characteristic curves of the slices are obtained according to the slice characteristic points of the slices in a fitting mode, the fitting circle is determined according to the characteristic curves, the deformation detection result of the storage tank to be detected is determined according to the fitting circle and the base circle, the integrated online detection and evaluation of the deformation of the tank body and the base of the storage tank are achieved, the detection and evaluation accuracy is high, the consumed time is short, the method is simple and rapid, the operability is high, and engineering application is facilitated.
Description
Technical Field
The invention relates to the technical field of petroleum storage tank safety assessment, in particular to a storage tank deformation detection method and device, electronic equipment and a storage medium.
Background
The storage tank is the main equipment for storing the petroleum medium, and the structure of the storage tank comprises a tank bottom, a tank wall, accessories, a foundation and the like. Due to reasons such as construction quality, wind load, foundation settlement and the like, the storage tank is very often subjected to geometric deformation. Therefore, whether the storage tank is newly built or used, deformation detection is needed to evaluate the safe use condition of the storage tank.
Most of the traditional measurement modes are single-point measurement to acquire spatial information of a target object, such as a girth ruler method, a total station method and the like, and have the problems of long measurement time, high working strength, low evaluation precision and the like.
Disclosure of Invention
The invention provides a storage tank deformation detection method, a storage tank deformation detection device, electronic equipment and a storage medium, and aims to solve the problems in the prior art.
The invention provides a storage tank deformation detection method, which comprises the following steps:
scanning the outline of a storage tank to be detected and the substrate surface of the storage tank to be detected to obtain outline point cloud data and substrate surface point cloud data, and constructing a storage tank model and the substrate surface in a coordinate system according to the outline point cloud data and the substrate surface point cloud data;
taking a plane vertical to a Z axis as a slicing plane, cutting the storage tank model at equal intervals to obtain a plurality of slices, obtaining slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle;
and fitting according to the slice characteristic points of each slice to obtain respective characteristic curves, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
According to the storage tank deformation detection method provided by the invention, the step of acquiring the slice characteristic points of each slice comprises the following steps:
cutting the middle position of a target slice by using the slice plane, and dividing the target slice into two sub-slices serving as an upper sub-slice and a lower sub-slice;
and determining the corresponding data point of each data point in the upper divided slice in the lower divided slice, and enabling the intersection point of a connecting line between the two data points and the slice plane to be used as a slice characteristic point.
According to the method for detecting the deformation of the storage tank, the cutting is performed on the surface of the substrate to obtain a substrate circle, and the method comprises the following steps:
determining a base circle of the storage tank model, wherein the base circle is formed by a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
and enabling the slice plane to pass through the center of a base circle, cutting into the substrate from the surface of the substrate and generating the base circle on the slice plane, wherein the radius of the base circle is the radial distance from the center of the base circle to the outermost data point of the surface of the substrate.
According to the storage tank deformation detection method provided by the invention, the deformation detection result of the storage tank to be detected is determined according to the fitting circle and the base circle, and the method comprises the following steps:
determining the inclination and the verticality of the storage tank to be tested according to any fitting circle and a base circle of the storage tank model, wherein the base circle is a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
determining the cylindricity of the storage tank to be tested according to any fitting circle;
and determining the settling amount of the storage tank to be detected according to the base circle and the base surface point cloud data.
According to the storage tank deformation detection method provided by the invention, the inclination and the perpendicularity of the storage tank to be detected are determined according to any fitting circle and the base circle of the storage tank model, and the method comprises the following steps:
determining the height of the fitting circle corresponding to the slice and the center of the fitting circle;
determining the circle centers of the base circles, establishing a connecting line between the two circle centers, and determining an included angle between the connecting line and the Z axis, wherein the included angle is used as the inclination of the storage tank to be detected;
and determining the verticality of the storage tank to be detected according to the height and the included angle.
According to the storage tank deformation detection method provided by the invention, the method for determining the cylindricity of the storage tank to be detected according to any fitting circle comprises the following steps:
obtaining the radius of the inner wall or the outer wall of the storage tank corresponding to the fitting circle;
obtaining the distance from the fitting point of the fitting circle to the circle center;
and determining the maximum deviation of the distance and the radius as the cylindricity of the storage tank to be detected.
According to the storage tank deformation detection method provided by the invention, the determination of the settlement of the storage tank to be detected according to the base circle and the base surface point cloud data comprises the following steps:
equally dividing the base circle, determining a data point closest to the equally divided point in the cloud data of the points on the surface of the base, and taking the closest data point as a characteristic point;
and taking the coordinate value of the characteristic point in the Z direction as the settlement of the storage tank to be detected.
The present invention also provides a storage tank deformation detection apparatus, comprising:
the system comprises an acquisition module, a storage tank model acquisition module and a storage tank model acquisition module, wherein the acquisition module is used for scanning the outline of a storage tank to be detected and the base surface of the storage tank to be detected to obtain outline point cloud data and base surface point cloud data, and the storage tank model and the base surface in a coordinate system are constructed according to the outline point cloud data and the base surface point cloud data;
the processing module is used for cutting the storage tank model at equal intervals by taking a plane vertical to the Z axis as a slice plane to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle;
and the detection module is used for obtaining respective characteristic curves according to the fitting of the slice characteristic points of the slices, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the tank deformation detection method as described above when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for tank deformation detection as described above.
According to the storage tank deformation detection method, the storage tank deformation detection device, the electronic equipment and the storage medium, the point cloud data of the storage tank and the base are obtained through laser scanning, the storage tank model and the base surface are obtained based on the point cloud data, the storage tank model is sliced, the sliced fitting circle and the base circle of the base are obtained, data analysis is carried out on the basis of the fitting circle and the base circle, the deformation detection result of the storage tank is obtained, the deformation degree of the storage tank is further estimated, integration, online detection and evaluation of deformation of the tank body and the base of the storage tank are achieved, and the method and the device have the advantages of being high in detection and evaluation accuracy, short in time consumption, simple, fast, strong in operability and wide in application range, and are convenient for engineering application.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of a method for detecting deformation of a storage tank according to the present invention;
FIG. 2 is a schematic diagram of the construction of a tank model and a substrate surface according to the present invention;
FIG. 3 is a schematic diagram of a fit of a circle corresponding to each slice of the tank of the present invention;
FIG. 4 is a view showing the acquisition of the slice feature points according to the present invention;
FIG. 5 is a schematic diagram of the inclination and perpendicularity of the storage tank of the present invention;
FIG. 6 is a schematic diagram of an embodiment of the deformation detecting device for a storage tank according to the present invention;
FIG. 7 is a block diagram of an embodiment of an electronic device according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes a tank deformation detection method, apparatus, electronic device and storage medium provided by the present invention with reference to fig. 1 to 7.
Fig. 1 shows a schematic flow chart of a tank deformation detection method provided by the present invention, and referring to fig. 1, the method includes:
11. scanning the outline of the storage tank to be detected and the base surface of the storage tank to be detected to obtain outline point cloud data and base surface point cloud data, and constructing a storage tank model and the base surface in a coordinate system according to the outline point cloud data and the base surface point cloud data;
12. taking a plane vertical to the Z axis as a slicing plane, performing equidistant cutting on the storage tank model to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle;
13. and fitting according to the slice characteristic points of each slice to obtain respective characteristic curves, determining a fitting circle according to the characteristic curves, and determining a deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
In the steps 11 to 13, it should be noted that, in the present invention, any vertical cylindrical newly-built or in-service storage tank in the oil depot and the refinery tank field can be used as a storage tank to be tested, the type of the storage tank can include a fixed roof, an outer floating roof, an inner floating roof and a vault, the medium in the tank can be crude oil, product oil, hazardous chemical, sewage and other liquids, and the volume of the storage tank is not limited.
After a storage tank to be detected is selected, a three-dimensional laser scanner is adopted to carry out field scanning on the profile of the storage tank and the surface of a substrate, and profile point cloud data and substrate surface point cloud data are obtained. The point cloud data can be obtained by an internal measurement method or an external measurement method. The external measurement method is to place the scanner outside the tank and arrange the measuring stations and the targets outside the tank, wherein enough contact ratio exists between every two measuring stations and at least 3 common targets exist. The internal measurement method can place the scanner in the tank, such as the center of the bottom plate of the storage tank, and is suitable for measuring the empty tank.
The three-dimensional laser scanning can obtain the three-dimensional coordinates of the surface of the earth and the surface of the real object, and the curved surface and the model reconstruction are realized by processing and processing a large amount of point cloud data. The storage tank and the substrate are subjected to non-contact scanning by adopting a three-dimensional laser scanning technology, dense point clouds and images of the outer vertical surface and the surface of the substrate of the storage tank can be rapidly obtained, and the system has the characteristics of short acquisition time, high precision (millimeter level), strong autonomy, intellectualization and the like, and provides a high-efficiency and simple online detection means for the structural measurement of the storage tank.
And preprocessing the storage tank point cloud data and the base surface point cloud data, including splicing and denoising. The purpose of the stitching is to transform the point cloud coordinates acquired by each survey station into the same coordinate system, and to stitch together the complete tank model and the base surface, which are shown in fig. 2.
Due to the fact that some point cloud data outside the structure of the storage tank or outside the surface of the substrate exist in the scanning process, noise point deletion needs to be carried out to obtain an accurate storage tank model and the surface of the substrate, wherein the storage tank model is arranged on the substrate.
The point cloud data scanned and obtained by the three-dimensional laser is in a local coordinate system with the measuring station as the center, and the coordinate systems of the point cloud data obtained by different measuring stations are not uniform. If a plurality of stations are arranged in the scanning process, the data scanned by the stations needs to be spliced and unified to the same coordinate system. There are two common methods for achieving coordinate system unification: (1) firstly, registering data of a plurality of measuring stations, then measuring geodetic coordinates of more than 3 targets, and directly converting the registered point cloud data into a geodetic coordinate system; (2) and respectively laying more than 3 targets for each survey station, measuring the geodetic coordinates of the targets, and directly converting the data of each survey station into a geodetic coordinate system. The second method is generally adopted, namely more than 3 targets are distributed at each survey station, and geodetic coordinate conversion is directly carried out.
In the present invention, the tank model needs to be cut at equal intervals to be divided into a plurality of slices. The cutting mode is as follows: the plane perpendicular to the Z-axis is taken as the slice plane, and the base circle position of the tank model is taken as the initial position of the slice. The base circle is a circle formed by a large-angle welding seam welded between a wall plate and a bottom plate of the storage tank.
It should be noted that, if the surface of the tank body of the storage tank is locally deformed, the radius and the ovality of the ring plate in the deformed area are both changed in numerical value, so that it is necessary to extract the section of the tank body to obtain the information, and this process is called as extraction of the section information of the tank body. Because the point clouds are scattered and distributed in space, if the plane is directly used for replacing the section slice of the tank body to directly extract the information, the calculation result cannot indicate whether the area where the plane is located is deformed, so that the deformation of the area is judged by a slice with a certain thickness.
In the invention, after a plurality of slices are obtained, slice characteristic points of the slices are required to be extracted, then respective characteristic curves are obtained by fitting according to the slice characteristic points of the slices, and a fitting circle is determined according to the characteristic curves. See fig. 3.
Correspondingly, the substrate surface is cut, and then a substrate circle is obtained by fitting according to data points on the substrate surface.
In the invention, the judgment of the deformation of the storage tank can be referred to from the aspects of inclination, verticality, cylindricity and settlement, and therefore, the deformation detection result of the storage tank to be detected is determined according to the fitting circle and the base circle, and comprises the information of the inclination, the verticality, the cylindricity and the settlement.
The deformation degree of the storage tank to be detected can be judged according to the obtained deformation detection result.
According to the storage tank deformation detection method provided by the invention, the point cloud data of the storage tank and the substrate is obtained through laser scanning, the storage tank model and the substrate surface are obtained based on the point cloud data, the storage tank model is sliced, the sliced fitting circle and the substrate circle of the substrate are obtained, data analysis is carried out on the basis of the fitting circle and the substrate circle to obtain the deformation detection result of the storage tank, the deformation degree of the storage tank is further estimated, the integration, on-line detection and evaluation of the deformation of the tank body and the substrate of the storage tank are realized, and the method has the characteristics of high detection and evaluation precision, short time consumption, simplicity, rapidness, strong operability and wide application range, and is convenient for engineering application.
In the further description of the above method, the explanation is mainly made on the processing procedure for acquiring the slice feature points of each slice, and the details are as follows:
cutting the middle position of the target slice by using a slice plane to divide the target slice into two sub-slices serving as an upper sub-slice and a lower sub-slice;
and determining the corresponding data point of each data point in the upper section in the lower section, and taking the intersection point of the connecting line between the two data points and the section plane as the section characteristic point.
In this regard, in the present invention, the above-described characteristic point acquisition method is performed for each slice. And selecting one slice from the plurality of slices as a target slice to be processed.
Referring to fig. 4, the slicing plane is the plane S in fig. 4. Cutting the target slice G with the thickness delta at equal intervals along the Z-axis direction to divide the target slice G into upper sub-slices G 1 And a lower divided chip G 2 Using G 1 And G 2 Generating characteristic points of each sub-slice by point cloud data in the point cloud data, and finding out an upper sub-slice G 1 In each data point in the lower section G 2 If the distance between the closest point and the corresponding data point on the upper die is smaller than the preset threshold value, the closest point is taken as the data point corresponding to the data point on the upper die and can be called as a corresponding point. At this time, a line is established between the two points, and an intersection point with the line is found on the plane S as a sliceOne of which is a slice feature point.
In the invention, each slice is cut again at equal intervals, so that data points on the upper and lower sub-slices are connected and intersected on a slice plane used for cutting again, and the intersection point is taken as a characteristic point, so that the data points on each slice can be fully adopted, the characteristic point is more fit with each slice, and the characteristic point is accurately acquired.
In addition, it should be noted that, because the characteristic of point cloud disorder is limited, it is impossible to express the tank profile characteristics based on the points of the point cloud on the plane, and a tank point cloud slice needs to be obtained through a point cloud with a certain thickness. The slice thickness setting needs to meet the requirement of section information extraction, the number of points reserved in the slice is too many due to overlarge thickness setting, excessive calculation is needed, the efficiency is low, and meanwhile, the calculation result is difficult to correctly express the surface area deformation of the tank body due to the fact that the too thick slice contains the excessive section information; the number of points in the extracted slices is too small due to the fact that the thickness is set to be too small, once a certain section of tank point cloud in the slices is lost, the error of the fitted curve is large, and the curve cannot reflect the section characteristics of the tank. Preferably the slice thickness is the thickness of the can wall at the slice location.
In the further description of the above method, the explanation of the processing procedure for cutting the substrate surface to obtain the substrate circle is mainly as follows:
determining a base circle of the storage tank model, wherein the base circle is a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
and enabling the slice plane to pass through the center of the base circle, cutting into the substrate from the surface of the substrate and generating the base circle on the slice plane, wherein the radius of the base circle is the radial distance from the center of the base circle to the outermost data point of the surface of the substrate.
In this regard, in the present invention, the point cloud data of the substrate surface is extracted, and according to the determined base circle, the slice plane passes through the center of the base circle and is perpendicular to the Z axis, and a substrate circle C with a radius of R1 is generated on the slice plane, where R1 is the radial distance from the center of the base circle to the outermost data point of the substrate surface.
In the invention, the storage tank is arranged on the base, if the storage tank is settled, the base circle passing through the center of the base circle is changed, and therefore, the generated base circle is analyzed to obtain the settlement amount of the storage tank.
In the further description of the above method, the explanation of the processing procedure for determining the deformation detection result of the tank to be detected according to the fitting circle and the base circle is mainly as follows:
determining the inclination and the verticality of the storage tank to be tested according to any fitting circle and a base circle of the storage tank model, wherein the base circle is a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
determining the cylindricity of the storage tank to be tested according to any fitting circle;
and determining the sedimentation amount of the storage tank to be detected according to the base circle and the base surface point cloud data.
In this regard, it should be noted that, in the present invention, the base circle of the tank model is a large angle weld of the wall plate and the bottom plate of the tank model. The base circle is the standard for the bottom layer. If it is determined whether the tank wall at any height on the tank body of the storage tank is deformed, it is only necessary to determine whether the tank wall corresponding to the slice at a certain height is deformed. Therefore, the height of the fitting circle corresponding to the slice and the center of the fitting circle are determined, the center of the base circle is determined, a connecting line between the two centers of the circle is established, the included angle theta between the connecting line and the Z axis is determined, the included angle serves as the gradient of the storage tank to be detected, and then the perpendicularity of the storage tank to be detected is determined according to the height h and the included angle theta. For example, perpendicularity = h × tan θ. Here, referring specifically to fig. 5, fig. 5 can visually see the display positions of the inclination and the perpendicularity.
The allowable deviation of the perpendicularity is required as follows: a) The allowable deviation of the perpendicularity of the tank wall is not more than 0.4 percent of the height of the tank wall and is not more than 50mm. b) The allowable deviation of the verticality of the bottom wall plate is not more than 3mm.
The tank wall corresponding to the slice on one layer is deformed, and the cylindricity of the slice on the layer is changed. Therefore, the cylindricity of the storage tank to be tested is determined according to any fitting circle, and the method specifically comprises the following steps:
obtaining the radius of the inner wall or the outer wall of the storage tank corresponding to the fitting circle;
obtaining the distance from a fitting point of a fitting circle to the center of the circle;
and determining the maximum deviation of the distance and the radius as the cylindricity of the storage tank to be detected.
The cylindricity tolerance requirement is as follows: a) The radius deviation measured at any point on the inner surface at 1m height of the tank wall of the bottom ring should not exceed the specification of table 1. b) The radius deviations measured above 1m height of the base ring can wall should not exceed 2 times the deviations in table 1.
According to the invention, the settlement of the storage tank to be measured is determined according to the base circle and the cloud data of the base surface points, and the method specifically comprises the following steps:
equally dividing the base circle, determining a data point closest to the equally divided point in the cloud data of the points on the surface of the base, and taking the closest data point as a characteristic point;
and taking the coordinate value of the characteristic point in the Z direction as the settlement of the storage tank to be detected.
In this regard, it should be noted that dividing C into equal parts finds the equal division point C separating C in the base point cloud i Nearest point A i ，A i Namely the characteristic points.
A i The Z-direction coordinate value of (A) is a settlement quantity named as U i The uneven settling amount of the substrate is as follows:
S i ＝U i -(U i-1 +U i+1 )/2 (1)
S i ≤11L 2 σ y /2EH t (2)
in the formula: s. the i Is the relative deformation; l is the bisector C i The circumferential arc length therebetween; sigma y Is the material yield strength; e is the modulus of elasticity; h t Is the height of the tank; u shape i Is a characteristic point A i The amount of sedimentation of (a). S i And (3) the formula (2) is met, the sedimentation of the storage tank foundation meets the requirement of safe operation, and otherwise the standard exceeds.
The tank deformation detecting device provided by the present invention is described below, and the tank deformation detecting device described below and the tank deformation detecting method described above may be referred to in correspondence with each other.
Fig. 6 shows a schematic structural diagram of a tank deformation detection device provided by the present invention, referring to fig. 6, the device includes an acquisition module 61, a processing module 62 and a detection module 63, wherein:
the acquisition module 61 is used for scanning the outline of the storage tank to be detected and the substrate surface of the storage tank to be detected, acquiring outline point cloud data and substrate surface point cloud data, and constructing a storage tank model and the substrate surface in a coordinate system according to the outline point cloud data and the substrate surface point cloud data;
the processing module 62 is configured to perform equidistant cutting on the storage tank model to obtain a plurality of slices by using a plane perpendicular to the Z axis as a slice plane, obtain slice feature points of each slice, and perform cutting on the substrate surface to obtain a substrate circle;
and the detection module 63 is configured to obtain respective characteristic curves according to the fitting of the slice characteristic points of each slice, determine a fitting circle according to the characteristic curves, and determine a deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
In a further description of the above apparatus, the processing module, in the processing procedure of acquiring the slice feature points of each slice, is specifically configured to:
cutting the middle position of a target slice by using a slice plane to divide the target slice into two sub-slices serving as an upper sub-slice and a lower sub-slice;
and determining the corresponding data point of each data point in the upper divided slice in the lower divided slice, and enabling the intersection point of a connecting line between the two data points and the slice plane to be used as a slice characteristic point.
In a further description of the above apparatus, the processing module is specifically configured to, during a process of cutting the substrate surface to obtain a substrate circle:
determining a base circle of the storage tank model, wherein the base circle is formed by a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
and enabling the slice plane to pass through the center of a base circle, cutting into the substrate from the surface of the substrate and generating the base circle on the slice plane, wherein the radius of the base circle is the radial distance from the center of the base circle to the outermost data point of the surface of the substrate.
In a further description of the above apparatus, the detection module, in the processing procedure of determining the deformation detection result of the tank to be detected according to the fitting circle and the base circle, is specifically configured to:
determining the inclination and the verticality of the storage tank to be tested according to any fitting circle and a base circle of the storage tank model, wherein the base circle is a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
determining the cylindricity of the storage tank to be tested according to any fitting circle;
and determining the settling amount of the storage tank to be detected according to the base circle and the base surface point cloud data.
In the further description of the above apparatus, the detection module is specifically configured to, in the processing procedure of determining the inclination and the perpendicularity of the tank to be measured according to any fitting circle and the base circle of the tank model:
determining the height of the fitting circle corresponding to the slice and the center of the fitting circle;
determining the circle centers of the base circles, establishing a connecting line between the two circle centers, and determining an included angle between the connecting line and the Z axis, wherein the included angle is used as the inclination of the storage tank to be detected;
and determining the verticality of the storage tank to be detected according to the height and the included angle.
In a further description of the above apparatus, the detection module, during the process of determining the cylindricity of the tank to be tested according to any of the fitting circles, is specifically configured to:
obtaining the radius of the inner wall or the outer wall of the storage tank corresponding to the fitting circle;
obtaining the distance from the fitting point of the fitting circle to the circle center;
and determining the maximum deviation of the distance and the radius as the cylindricity of the storage tank to be detected.
In a further description of the above apparatus, the detection module is specifically configured to, during a process of determining a settling amount of the tank to be measured according to the base circle and the base surface point cloud data:
equally dividing the base circle, determining a data point closest to the equally divided point in the cloud data of the points on the surface of the base, and taking the closest data point as a characteristic point;
and taking the coordinate value of the characteristic point in the Z direction as the settlement of the storage tank to be detected.
Since the principle of the apparatus according to the embodiment of the present invention is the same as that of the method according to the above embodiment, further details are not described herein for further explanation.
It should be noted that, in the embodiment of the present invention, the relevant functional module may be implemented by a hardware processor (hardware processor).
According to the storage tank deformation detection device provided by the invention, the point cloud data of the storage tank and the substrate is obtained through laser scanning, the storage tank model and the substrate surface are obtained based on the point cloud data, the storage tank model is sliced, the sliced fitting circle and the substrate circle of the substrate are obtained, data analysis is carried out on the basis of the fitting circle and the substrate circle to obtain the deformation detection result of the storage tank, the deformation degree of the storage tank is further estimated, the integration, on-line detection and evaluation of the deformation of the tank body and the substrate of the storage tank are realized, and the storage tank deformation detection device has the characteristics of high detection and evaluation precision, short time consumption, simplicity, rapidness, strong operability and wide application range, and is convenient for engineering application.
Fig. 7 illustrates a physical structure diagram of an electronic device, and as shown in fig. 7, the electronic device may include: a processor (processor) 71, a communication Interface (Communications Interface) 72, a memory (memory) 73 and a communication bus 74, wherein the processor 71, the communication Interface 72 and the memory 73 are communicated with each other via the communication bus 74. Processor 71 may call logic instructions in memory 73 to perform the following method: scanning the outline of a storage tank to be detected and the substrate surface of the storage tank to be detected to obtain outline point cloud data and substrate surface point cloud data, and constructing a storage tank model and the substrate surface in a coordinate system according to the outline point cloud data and the substrate surface point cloud data; taking a plane vertical to a Z axis as a slicing plane, performing equidistant cutting on the storage tank model to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle; and fitting according to the slice characteristic points of each slice to obtain respective characteristic curves, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
In addition, the logic instructions in the memory 73 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above methods, the method comprising: scanning the outline of a storage tank to be detected and the substrate surface of the storage tank to be detected to obtain outline point cloud data and substrate surface point cloud data, and constructing a storage tank model and the substrate surface in a coordinate system according to the outline point cloud data and the substrate surface point cloud data; taking a plane vertical to a Z axis as a slicing plane, performing equidistant cutting on the storage tank model to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle; and fitting according to the slice characteristic points of each slice to obtain respective characteristic curves, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to perform the methods provided by the above embodiments, for example, including: scanning the outline of a storage tank to be detected and the base surface of the storage tank to be detected to obtain outline point cloud data and base surface point cloud data, and constructing a storage tank model and the base surface in a coordinate system according to the outline point cloud data and the base surface point cloud data; taking a plane vertical to a Z axis as a slicing plane, performing equidistant cutting on the storage tank model to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle; and fitting according to the slice characteristic points of each slice to obtain respective characteristic curves, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of detecting tank deformation, comprising:
scanning the outline of a storage tank to be detected and the substrate surface of the storage tank to be detected to obtain outline point cloud data and substrate surface point cloud data, and constructing a storage tank model and the substrate surface in a coordinate system according to the outline point cloud data and the substrate surface point cloud data;
taking a plane vertical to a Z axis as a slicing plane, performing equidistant cutting on the storage tank model to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle;
and fitting according to the slice characteristic points of each slice to obtain respective characteristic curves, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
2. The tank deformation detection method according to claim 1, wherein said acquiring slice feature points of each slice comprises:
cutting the middle position of a target slice by using the slice plane to divide the target slice into two sub-slices serving as an upper sub-slice and a lower sub-slice;
and determining the corresponding data point of each data point in the upper divided slice in the lower divided slice, and enabling the intersection point of a connecting line between the two data points and the slice plane to be used as a slice characteristic point.
3. The tank deformation detection method according to claim 1, wherein the cutting the substrate surface to obtain a substrate circle comprises:
determining a base circle of the storage tank model, wherein the base circle is formed by a circle at a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
and enabling the slice plane to pass through the center of a base circle, cutting into the substrate from the surface of the substrate and generating the base circle on the slice plane, wherein the radius of the base circle is the radial distance from the center of the base circle to the outermost data point of the surface of the substrate.
4. The method for detecting deformation of a storage tank according to claim 1, wherein the determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle comprises:
determining the inclination and the verticality of the storage tank to be tested according to any fitting circle and a base circle of the storage tank model, wherein the base circle is a circle around a large-angle welding seam of a wall plate and a bottom plate of the storage tank model;
determining the cylindricity of the storage tank to be tested according to any fitting circle;
and determining the settling amount of the storage tank to be detected according to the base circle and the base surface point cloud data.
5. The storage tank deformation detection method according to claim 4, wherein the determining the inclination and the perpendicularity of the storage tank to be detected according to any fitting circle and the base circle of the storage tank model comprises:
determining the height of the fitting circle corresponding to the slice and the center of the fitting circle;
determining the circle centers of the base circles, establishing a connecting line between the two circle centers, and determining an included angle between the connecting line and the Z axis, wherein the included angle is used as the inclination of the storage tank to be detected;
and determining the verticality of the storage tank to be detected according to the height and the included angle.
6. The method according to claim 4, wherein the determining the cylindricity of the tank under test from any fitting circle comprises:
obtaining the radius of the inner wall or the outer wall of the storage tank corresponding to the fitting circle;
obtaining the distance from the fitting point of the fitting circle to the circle center;
and determining the maximum deviation of the distance and the radius as the cylindricity of the storage tank to be detected.
7. The storage tank deformation detection method according to claim 4, wherein the determining the sedimentation amount of the storage tank to be detected according to the base circle and the base surface point cloud data comprises:
equally dividing the base circle, determining a data point closest to the equally divided point in the cloud data of the points on the surface of the base, and taking the closest data point as a characteristic point;
and taking the coordinate value of the characteristic point in the Z direction as the settlement of the storage tank to be detected.
8. A tank deformation detection device, comprising:
the system comprises an acquisition module, a storage tank model acquisition module and a storage tank model acquisition module, wherein the acquisition module is used for scanning the outline of a storage tank to be detected and the base surface of the storage tank to be detected to obtain outline point cloud data and base surface point cloud data, and the storage tank model and the base surface in a coordinate system are constructed according to the outline point cloud data and the base surface point cloud data;
the processing module is used for cutting the storage tank model at equal intervals by taking a plane vertical to the Z axis as a slice plane to obtain a plurality of slices, acquiring slice characteristic points of each slice, and cutting the surface of the substrate to obtain a substrate circle;
and the detection module is used for obtaining respective characteristic curves according to the fitting of the slice characteristic points of the slices, determining a fitting circle according to the characteristic curves, and determining the deformation detection result of the storage tank to be detected according to the fitting circle and the base circle.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, carries out the steps of the tank deformation detection method according to any one of claims 1 to 7.
10. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the tank deformation detection method according to any one of claims 1 to 7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117553723A (en) * | 2024-01-12 | 2024-02-13 | 中铁大桥局集团有限公司 | Positioning method for embedded part assembly plate hole group based on three-dimensional scanning technology |
| CN117990051A (en) * | 2024-02-01 | 2024-05-07 | 中交第三航务工程局有限公司 | Device and method for measuring perpendicularity of large-diameter tubular pile |
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2021
- 2021-09-12 CN CN202111065429.5A patent/CN115809973A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117553723A (en) * | 2024-01-12 | 2024-02-13 | 中铁大桥局集团有限公司 | Positioning method for embedded part assembly plate hole group based on three-dimensional scanning technology |
| CN117553723B (en) * | 2024-01-12 | 2024-04-23 | 中铁大桥局集团有限公司 | Positioning method for embedded part assembly plate hole group based on three-dimensional scanning technology |
| CN117990051A (en) * | 2024-02-01 | 2024-05-07 | 中交第三航务工程局有限公司 | Device and method for measuring perpendicularity of large-diameter tubular pile |
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