CN118293816B - Steel box girder construction micro-deformation monitoring method and system based on visual detection - Google Patents
Steel box girder construction micro-deformation monitoring method and system based on visual detection Download PDFInfo
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- CN118293816B CN118293816B CN202410712938.XA CN202410712938A CN118293816B CN 118293816 B CN118293816 B CN 118293816B CN 202410712938 A CN202410712938 A CN 202410712938A CN 118293816 B CN118293816 B CN 118293816B
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- 238000010276 construction Methods 0.000 title claims abstract description 232
- 238000000034 method Methods 0.000 title claims abstract description 111
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 230000000007 visual effect Effects 0.000 title claims abstract description 12
- 230000007613 environmental effect Effects 0.000 claims description 40
- 238000000605 extraction Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000011179 visual inspection Methods 0.000 claims 9
- 238000005452 bending Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- 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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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Abstract
The invention discloses a steel box girder construction micro-deformation monitoring method and system based on visual detection, and relates to the technical field of steel box girder construction micro-deformation monitoring. Comprising the following steps: and (3) image acquisition: acquiring contour information in the construction process of the construction member by an image acquisition method to obtain a construction image set; initial feature point position acquisition: based on the construction image set, a plurality of feature points are established on the surface of the construction member, position information of the feature points is obtained, and an initial feature point set is obtained. The method and the device continuously extract the positions of the characteristic points in the construction process, so that the position change condition and the change trend of the characteristic points can be reflected more clearly, and the actual deformation quantity and the deformation trend of the construction member in the current environment can be obtained more accurately according to the created environment influence model, thereby further improving the observation and judgment of the deformation of the construction member.
Description
Technical Field
The invention relates to the technical field of steel box girder construction micro-deformation monitoring, in particular to a steel box girder construction micro-deformation monitoring method and system based on visual detection.
Background
The steel box girder is also called a steel plate box girder, is a common structural form of a large-span bridge, is generally used on a bridge with a larger span, is a common structural form in engineering, is called a steel box girder because of the appearance like a box, and along with the rapid development of a viaduct and a city-winding high-speed engineering, the erection speed of the bridge is faster and faster, and the erection requirement is also more and more necessary, so that the steel box girder is wider and wider in application, the steel box girder is required in the construction process of various bridges, and the deformation of the steel box girder is required to be monitored in real time in the construction process of the steel box girder in order to ensure the construction safety, the quality and the efficiency of the construction process, and the construction quality is improved.
The utility model discloses a bridge prefabrication steel case roof beam construction deformation monitoring devices that number is CN216770578U, this device design is applicable to the quick stability of drop hammer, the multiunit magnetic force piece is all installed to outer magnetic force sleeve and interior magnetic force sleeve barrel, multiunit magnetic force piece magnetism repulses and makes outer magnetic force sleeve and interior magnetic force sleeve be in magnetic force steady state, interior magnetic force sleeve joint installs on the hanging wire, outer magnetic force sleeve and interior magnetic force sleeve magnetic force steady can guarantee the quick stable realization quick detection operation of drop hammer fast, the carousel passes through the screw knob and cooperates with angle screw sleeve, can four direction adjustment carousel turn to.
The above and similar technical schemes are used for monitoring the construction process of the steel box girder, because the deformation of a part generated by a construction member is tiny in the construction process of the steel box girder, the deformation trend of the steel box girder cannot be intuitively felt only through the acquisition of images or the independent presentation of data, or the deformation generated by the steel box girder cannot be checked when the staff observes with naked eyes, and certain errors can be generated in the deformation monitoring of the steel box girder under different angles or different distances, and the image acquisition is influenced by environmental factors when the construction member is scanned and is influenced, so that the judgment of the staff or an instrument is influenced.
Disclosure of Invention
The invention aims to provide a steel box girder construction micro-deformation monitoring method and system based on visual detection, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a steel box girder construction micro deformation monitoring method and system based on visual detection comprises the following steps:
And (3) image acquisition: acquiring contour information in the construction process of the construction member by an image acquisition method to obtain a construction image set;
Initial feature point position acquisition: based on the construction image set, establishing a plurality of characteristic points on the surface of a construction member, and obtaining position information of the plurality of characteristic points to obtain an initial characteristic point set;
Trend feature point position acquisition: based on the construction image set, extracting position information of a plurality of feature points of the construction member outline according to an extraction method to obtain a trend feature point set;
Feature point contrast: based on the position comparison of the trend feature points and the initial feature points, the change trend of the profile information in the construction process of the construction member is obtained, and a first deformation trend set of the construction member is obtained;
Building an environmental impact model: building an environmental impact model based on the construction image set, wherein the environmental impact model is used for outputting impact data, and the trend feature point set is combined with the impact data according to a combination method to obtain a second deformation trend set of the construction member;
data analysis: based on the first deformation trend set and the second deformation trend set, accurately monitoring micro deformation of the construction member in the construction process of the steel box girder;
The method for constructing the environmental impact model comprises the following steps:
s1: acquiring characteristic point position changes of different materials under different environmental factors and different loading conditions, and acquiring a deformation information set;
S2: the deformation information set comprises first characteristic point positions, environmental factors are divided into environmental levels, and the first characteristic point sets are obtained based on the first characteristic point positions obtained by the environmental levels under the conditions of different levels, so that an environmental influence model is obtained.
Further, the method for establishing the feature points comprises the following steps:
dividing the surface of the construction member into a plurality of areas, wherein each area at least comprises one characteristic point;
dividing the edge of the construction member into a plurality of interval sections, wherein each interval section at least contains one characteristic point;
the position information of the feature points is taken as the feature point coordinate information.
Still further, the construction image set includes a first image set, and the image acquisition method includes: the method comprises the steps that a plurality of groups of machine positions are arranged in a plurality of directions of a construction member, at least one high-definition camera is arranged in each group of machine positions, in the construction process, outlines of the top and two sides of the construction member are shot, and a first image set is obtained, wherein the first image set comprises a three-dimensional image of the construction member.
Still further, the construction image set includes a second image set, and the image acquisition method includes: at least one group of sound wave transmitting units and sound wave reflecting members are arranged in a plurality of directions of the construction member, each group of sound wave transmitting units at least comprises a sound wave transmitter, each group of sound wave reflecting members at least comprises a sound wave reflector and is used for scanning sound waves on the surface of the construction member to obtain a three-dimensional reflection image formed by the sound wave reflectors, and the second image set comprises three-dimensional reflection images of a plurality of groups of construction members.
Further, the method for establishing the characteristic points comprises the steps that the position of the sound wave reflector is taken as the position of the characteristic points, the sound wave emitted by the sound wave emitter reflects the position of the sound wave reflector, and the position information of the sound wave reflector is taken as the coordinate information of the characteristic points.
Still further, the extraction method includes a preset condition extraction and a preset time extraction:
Extracting preset conditions, namely comparing the results of the two continuous characteristic point position information extraction in the construction process, presetting a limiting fluctuation value, and continuously extracting the characteristic point position information for a plurality of times in a period of time when the comparison result shows that the fluctuation range of the characteristic point position information exceeds the limiting fluctuation value;
and extracting preset time, and automatically acquiring the position information of a plurality of characteristic points of the construction member contour at intervals in the construction process according to the set time interval.
Still further, the feature point comparison method includes: and comparing the position coordinates of the initial feature points with the initial coordinates of feature points in the trend feature point set according to the front-back sequence of the extraction time to obtain coordinate change curves of a plurality of different feature points, wherein the coordinate change curves form a first deformation trend set.
Still further, the environmental factors include a combination of at least two of temperature, humidity, ultraviolet intensity, and salt content, deformation of the construction element under vertical compressive load and longitudinal tensile load at different locations.
Still further, the bonding method includes: and combining the trend characteristic point set obtained under the current environment with the first characteristic point set under the corresponding environment level to eliminate the influence of environmental factors on the construction member in the construction process.
Furthermore, the steel box girder construction micro-deformation monitoring system based on visual detection uses the steel box girder construction micro-deformation monitoring method based on visual detection.
Compared with the prior art, the invention has the beneficial effects that:
The method and the system for monitoring the micro deformation of the steel box girder construction based on visual detection are characterized in that through the set environment influence model, the positions of different characteristic points can be changed in the construction process, at the moment, the deformation condition of a construction member can be reflected according to the corresponding position change condition of the characteristic points, and the positions of the characteristic points are continuously extracted in the construction process according to a preset extraction method, so that the position change condition and the change trend of the characteristic points can be more clearly reflected, in the actual construction process, external environment factors can also have certain influence on the construction member, even if the same materials have larger variability, the environment influence model is created at the moment, the actual deformation quantity and the deformation trend of the construction member under the current environment can be more accurately obtained through the combination of the created environment influence model and the position change condition of the characteristic points, and the observation and judgment of the deformation of the construction member can be further improved.
Meanwhile, through the establishment mode of various characteristic points, the surface of the construction member is divided into a plurality of areas, and the characteristic points are arranged in each area, so that the surface of the whole construction member can be covered by the mode, and the comprehensiveness of deformation information is ensured; the other is that the edge of the construction member is divided into a plurality of interval sections, and characteristic points are arranged in each interval section, so that the mode can focus on the edge deformation condition of the construction member, the contour image of the construction member is obtained from multiple aspects, the height, the position and the angle of a camera are kept unchanged all the time in the contour image obtaining process, and the acquired contour image has better contrast at the moment, so that the error can be further reduced.
And, the surface profile image of the construction member is obtained through various modes, different modes are selected under different conditions, such as a three-dimensional reflection image of the surface of the construction member obtained by reflecting the sound wave emitted by the sound wave emitter through the sound wave reflector, the surface profile of the construction member can be obtained without contacting the construction member and photographing the construction member, and the surface profile image of the construction member can be obtained better and more accurately by using the surface profile image of the construction member obtained through some large or inaccessible or difficult-photographing modes.
Drawings
FIG. 1 is a schematic overall flow chart of the present invention;
FIG. 2 is a schematic view of the construction image set composition of the present invention;
FIG. 3 is a schematic diagram of the extraction method according to the present invention;
FIG. 4 is a schematic view of the construction element surface feature point structure of the present invention;
FIG. 5 is a schematic view of the edge feature point structure of the construction element of the present invention;
Fig. 6 is a schematic view of the position structure of the acoustic wave reflector of the construction element according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Under the influence of different external environment factors, deformation degree or displacement distance can be caused to the steel box girder in the erection process to a certain extent, at this moment, the deformation monitoring result of the steel box girder is inaccurate according to the standard limiting range in common use, deformation generated by the construction member has certain difference under the influence of different external environment factors and under the condition of different loads, and the deformation condition of the construction member can be combined with output data in a corresponding environment model according to the deformation condition of the construction member obtained in the current environment under the condition that the construction member is deformed, so that the influence on the construction member by different environment factors in the construction process is more accurate.
As shown in fig. 1 to 6, the present invention provides a technical solution: a steel box girder construction micro deformation monitoring method and system based on visual detection comprises the following steps: and (3) image acquisition: acquiring contour information in the construction process of the construction member by an image acquisition method to obtain a construction image set; initial feature point position acquisition: based on the construction image set, establishing a plurality of characteristic points on the surface of a construction member, and obtaining position information of the plurality of characteristic points to obtain an initial characteristic point set; trend feature point position acquisition: based on the construction image set, extracting position information of a plurality of feature points of the construction member outline according to an extraction method to obtain a trend feature point set; feature point contrast: based on the position comparison of the trend feature points and the initial feature points, the change trend of the profile information in the construction process of the construction member is obtained, and a first deformation trend set of the construction member is obtained; building an environmental impact model: building an environmental impact model based on the construction image set, wherein the environmental impact model is used for outputting impact data, and the trend feature point set is combined with the impact data according to a combination method to obtain a second deformation trend set of the construction member; data analysis: based on the first deformation trend set and the second deformation trend set, accurately monitoring micro deformation of the construction member in the construction process of the steel box girder; the method for building the environmental impact model comprises the following steps: s1: acquiring characteristic point position changes of different materials under different environmental factors and different loading conditions, and acquiring a deformation information set; s2: the deformation information set comprises first characteristic point positions, environmental factors are divided into environmental levels, and the first characteristic point sets are obtained based on the first characteristic point positions obtained by the environmental levels under the condition of different levels, so that an environmental influence model is obtained.
It should be noted that in the construction process, the construction member is slightly deformed due to pressure, at this time, by the image acquisition method, in the construction process, the contour image of the construction member is continuously acquired, when the construction is not started, the obtained contour image of the construction member is an initial image, that is, a state image of the construction member which is not stressed and is not deformed, after the construction is started, the contour images of a plurality of construction members in the obtained construction image set are recorded, and the deformation of the construction member in the whole construction process is used for being compared with the initial image, and the deformation condition of the construction member in the construction process is obtained through the comparison result; in the obtained initial image, a plurality of characteristic points for distinguishing and recording the positions of the construction member are established on the surface of the construction member, at this time, the position information of the plurality of characteristic points is used for representing deformation information of the construction member, in the construction process, the positions of different characteristic points can be changed, at this time, according to the position change condition of the corresponding characteristic points, the deformation condition of the construction member can be reflected, and according to a preset extraction method, the positions of the characteristic points are continuously extracted in the construction process, so that the position change condition and the change trend of the characteristic points can be reflected more clearly.
In the construction process, as the external environment can cause different influences on the construction members, the construction members made of different materials have different adaptability to different environments, and under some special environmental influences, such as weather with higher temperature or lower temperature; such as higher humidity or drier weather; such as solar time and solar intensity, and ultraviolet ray; such as near the sea or at the sea, where the air and water are high in salt content; and for example, the construction member is put into use after being put aside for a long time after being produced, the conditions can generate certain influence on the construction member in the actual construction process, even if the same material is used, the condition that the difference is larger can also occur, and even if the different material is used under the influence of the environment, the difference is larger, at the moment, serious interference and error can exist when the construction member is compared and analyzed according to the contour image of the construction member, so that the actual deformation quantity and deformation trend of the construction member under the current environment can be more accurately obtained through the established environment influence model and the position change condition of the influence data combined characteristic points output by the environment influence model, and the observation and judgment of the deformation of the construction member can be further improved.
In the construction process of the environmental impact model, the material properties, the structural characteristics and the types and the sizes of the loaded construction components are required to be considered, and the factors have significant influence on deformation.
As shown in fig. 4 to 5, the method for establishing the feature points includes: dividing the surface of the construction member into a plurality of areas, wherein each area at least comprises one characteristic point; dividing the edge of the construction member into a plurality of interval sections, wherein each interval section at least contains one characteristic point; the position information of the feature points is taken as the feature point coordinate information.
As a specific embodiment, the construction image set includes a first image set, and the image acquisition method includes: the method comprises the steps that a plurality of groups of machine positions are arranged in a plurality of directions of a construction member, at least one high-definition camera is arranged in each group of machine positions, in the construction process, outlines of the top and two sides of the construction member are shot, and a first image set is obtained, wherein the first image set comprises a three-dimensional image of the construction member.
It should be noted that, there are two ways of establishing the characteristic point, one is to divide the surface of the construction member into a plurality of areas, each area is provided with the characteristic point, this way can cover the surface of the whole construction member, ensure the comprehensiveness of the deformation information; the other is that the edge of the construction member is divided into a plurality of sections, characteristic points are arranged in each section, the mode can focus on the edge deformation condition of the construction member, the construction member with certain specific shape or structure is more applicable, deformation possibly existing in the construction members with different shapes and different types can be different in a plurality of construction processes, deformation possibly existing in the construction members with higher thickness is mostly surface deformation such as bulge and skin falling off, deformation possibly existing in the construction members with lighter materials is mostly angular deformation such as bending, breaking and the like, deformation possibly existing in the construction members with thinner thickness is mostly in a state that the angular deformation coexists with the surface deformation such as integral bending deformation, therefore, the construction members with various types can be covered more comprehensively through the establishment mode of the characteristic points, the outline of the construction members is photographed through a high-definition camera, and the characteristic point positions are compared.
In order to ensure shooting quality, the high-definition camera should have enough resolution and stability to ensure that the image is clear and stable, so as to accurately reflect the deformation condition of the construction member, and the height, position and angle of the camera are always unchanged in the process of acquiring the contour image, so that the acquired contour image has better contrast, and the error can be further reduced.
As a specific embodiment, the construction image set includes a second image set, and the image acquisition method includes: at least one group of sound wave transmitting units and sound wave reflecting members are arranged in a plurality of directions of the construction member, each group of sound wave transmitting units at least comprises a sound wave transmitter, each group of sound wave reflecting members at least comprises a sound wave reflector and is used for scanning sound waves on the surface of the construction member to obtain a three-dimensional reflection image formed by the sound wave reflectors, and the second image set comprises three-dimensional reflection images of a plurality of groups of construction members.
As shown in fig. 6, the method for establishing the feature point includes using the position of the acoustic wave reflector as the position of the feature point, reflecting the position of the acoustic wave reflector by the acoustic wave emitted by the acoustic wave emitter, and using the position information of the acoustic wave reflector as the coordinate information of the feature point.
It should be noted that, the three-dimensional reflection map of the surface of the construction member obtained by reflecting the sound wave emitted by the sound wave emitter by the sound wave reflector can obtain the surface morphology of the construction member without touching the construction member or photographing the construction member, is more useful for some large or inaccessible or difficult-to-photograph construction members with the surface contour obtained by photographing, and the position of the sound wave reflector is used as the position of the characteristic point, and when the construction member is deformed, the position of the sound wave reflector is changed, so that the deformation degree and the deformation trend of the construction member can be intuitively observed and compared in the obtained three-dimensional reflection map.
As shown in fig. 3, the extraction method includes preset condition extraction and preset time extraction: extracting preset conditions, namely comparing the results of the two continuous characteristic point position information extraction in the construction process, presetting a limiting fluctuation value, and continuously extracting the characteristic point position information for a plurality of times in a period of time when the comparison result shows that the fluctuation range of the characteristic point position information exceeds the limiting fluctuation value; and extracting preset time, and automatically acquiring the position information of a plurality of characteristic points of the construction member contour at intervals in the construction process according to the set time interval.
It should be noted that in the construction process, according to the preset time, acquiring the contour image of the construction member at fixed time, and comparing the acquired contour image of the construction member with the feature points, or transmitting the sound wave by the sound wave transmitter at fixed time, acquiring the position of the sound wave reflector, and further acquiring the position of the feature points, wherein the shorter the preset time interval is, the more accurate the acquired change of the feature points is, and the more the change of the position of the feature points can be acquired in time, but more data can be generated, wherein the more repeated data can be included, and the construction member is suitable for mounting more precise construction members; the longer the preset time interval is, the coarser the position change of the obtained characteristic points is, the deformation condition and deformation trend of the construction member cannot be reflected more accurately, but the generated data volume is smaller, comparison is easier, the deformation of the construction member can be judged in the approximate situation, and the method is suitable for the installation of the construction member with low key degree.
According to the method for extracting the characteristic point position information, on the basis of the method for extracting the characteristic point position information in a preset time, a comparison value exists in the results of the two continuous characteristic point position information extraction, and when the fluctuation range of the comparison value of the two characteristic point position information exceeds the limit fluctuation value through the preset limit fluctuation value, the time interval for extracting the characteristic point position information is shortened by the stand horse, and the characteristic point position information is continuously extracted for multiple times in a time period for carrying out important observation on emergency.
As a specific embodiment, the feature point comparison method includes: and comparing the position coordinates of the initial feature points with the initial coordinates of feature points in the trend feature point set according to the front-back sequence of the extraction time to obtain coordinate change curves of a plurality of different feature points, wherein the coordinate change curves form a first deformation trend set.
It should be noted that, in the first deformation trend set, the coordinate change curves of different feature points are different, and the positions of part of the feature points in the whole construction process are not changed, that is, the construction member is not deformed due to construction, the change curves of the rest part of the feature points are substantially the same, and the change curves of the feature points all have a descending trend under the gravity and the pressure load.
As a specific embodiment, the environmental factors include deformation of the construction member under vertical compressive load and longitudinal tensile load at different positions under a combination of at least two influencing conditions of temperature, humidity, ultraviolet intensity and salt content.
It should be noted that under the influence of different environmental factors, deformation conditions of the construction member when the construction member receives the load of force at different positions are inconsistent, and even if the construction member with different materials receives the same force at the same environmental factors and the same positions, the deformation of the construction member with different materials still changes, and at this time, the deformation generated by the construction member is collected, so that the data stock of the environmental impact model can be expanded as much as possible, and corresponding impact data can be matched from the environmental impact model in the actual construction process.
As a specific embodiment, the bonding method includes: and combining the trend characteristic point set obtained under the current environment with the first characteristic point set under the corresponding environment level to eliminate the influence of environmental factors on the construction member in the construction process.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended embodiments and equivalents thereof.
Claims (10)
1. The method for monitoring the micro deformation of the steel box girder construction based on visual detection is characterized by comprising the following steps of:
And (3) image acquisition: acquiring contour information in the construction process of the construction member by an image acquisition method to obtain a construction image set;
Initial feature point position acquisition: based on the construction image set, establishing a plurality of characteristic points on the surface of a construction member, and obtaining position information of the plurality of characteristic points to obtain an initial characteristic point set;
Trend feature point position acquisition: based on the construction image set, extracting position information of a plurality of feature points of the construction member outline according to an extraction method to obtain a trend feature point set;
Feature point contrast: based on the position comparison of the trend feature points and the initial feature points, the change trend of the profile information in the construction process of the construction member is obtained, and a first deformation trend set of the construction member is obtained;
Building an environmental impact model: building an environmental impact model based on the construction image set, wherein the environmental impact model is used for outputting impact data, and the trend feature point set is combined with the impact data according to a combination method to obtain a second deformation trend set of the construction member;
data analysis: based on the first deformation trend set and the second deformation trend set, accurately monitoring micro deformation of the construction member in the construction process of the steel box girder;
The method for constructing the environmental impact model comprises the following steps:
s1: acquiring characteristic point position changes of different materials under different environmental factors and different loading conditions, and acquiring a deformation information set;
S2: the deformation information set comprises first characteristic point positions, environmental factors are divided into environmental levels, and the first characteristic point sets are obtained based on the first characteristic point positions obtained by the environmental levels under the conditions of different levels, so that an environmental influence model is obtained.
2. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the method for establishing the feature points comprises the following steps:
dividing the surface of the construction member into a plurality of areas, wherein each area at least comprises one characteristic point;
dividing the edge of the construction member into a plurality of interval sections, wherein each interval section at least contains one characteristic point;
the position information of the feature points is taken as the feature point coordinate information.
3. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the construction image set comprises a first image set, and the image acquisition method comprises the following steps: the method comprises the steps that a plurality of groups of machine positions are arranged in a plurality of directions of a construction member, at least one high-definition camera is arranged in each group of machine positions, in the construction process, outlines of the top and two sides of the construction member are shot, and a first image set is obtained, wherein the first image set comprises a three-dimensional image of the construction member.
4. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the construction image set comprises a second image set, and the image acquisition method comprises the following steps: at least one group of sound wave transmitting units and sound wave reflecting members are arranged in a plurality of directions of the construction member, each group of sound wave transmitting units at least comprises a sound wave transmitter, each group of sound wave reflecting members at least comprises a sound wave reflector and is used for scanning sound waves on the surface of the construction member to obtain a three-dimensional reflection image formed by the sound wave reflectors, and the second image set comprises three-dimensional reflection images of a plurality of groups of construction members.
5. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 4, wherein the method comprises the following steps: the method for establishing the characteristic points comprises the steps that the position of the sound wave reflector is used as the position of the characteristic points, the sound wave emitted by the sound wave emitter reflects the position of the sound wave reflector, and the position information of the sound wave reflector is used as coordinate information of the characteristic points.
6. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the extraction method comprises the steps of extracting under preset conditions and extracting for preset time:
Extracting preset conditions, namely comparing the results of the two continuous characteristic point position information extraction in the construction process, presetting a limiting fluctuation value, and continuously extracting the characteristic point position information for a plurality of times in a period of time when the comparison result shows that the fluctuation range of the characteristic point position information exceeds the limiting fluctuation value;
and extracting preset time, and automatically acquiring the position information of a plurality of characteristic points of the construction member contour at intervals in the construction process according to the set time interval.
7. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the feature point comparison method comprises the following steps: and comparing the position coordinates of the initial feature points with the initial coordinates of feature points in the trend feature point set according to the front-back sequence of the extraction time to obtain coordinate change curves of a plurality of different feature points, wherein the coordinate change curves form a first deformation trend set.
8. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the environmental factors comprise at least two influence condition combinations of temperature, humidity, ultraviolet intensity and salt content, and the construction member is subjected to deformation under vertical pressure load and longitudinal tension load at different positions.
9. The steel box girder construction micro-deformation monitoring method based on visual inspection according to claim 1, wherein the method comprises the following steps: the bonding method comprises the following steps: and combining the trend characteristic point set obtained under the current environment with the first characteristic point set under the corresponding environment level to eliminate the influence of environmental factors on the construction member in the construction process.
10. Steel case roof beam construction micro deformation monitoring system based on visual detection, its characterized in that: a steel box girder construction micro deformation monitoring method based on visual inspection according to any one of claims 1 to 9.
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