KR101538763B1 - Apparatus and Method for Inspecting Crack in Tunnel - Google Patents
Apparatus and Method for Inspecting Crack in Tunnel Download PDFInfo
- Publication number
- KR101538763B1 KR101538763B1 KR1020140111581A KR20140111581A KR101538763B1 KR 101538763 B1 KR101538763 B1 KR 101538763B1 KR 1020140111581 A KR1020140111581 A KR 1020140111581A KR 20140111581 A KR20140111581 A KR 20140111581A KR 101538763 B1 KR101538763 B1 KR 101538763B1
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- tunnel
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- cameras
- crack
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
- G01N2021/8893—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques providing a video image and a processed signal for helping visual decision
Abstract
Description
The present invention relates to a tunnel crack inspection apparatus and a control method thereof, and more particularly, to a tunnel crack inspection apparatus having a frame bar capable of adjusting a photographing distance with a shape corresponding to the shape of an inner surface of a tunnel.
At present, Korea is leaping into the world's fifth high-speed railway age, and the interest in maintenance is increasing as the overall infrastructure infrastructure increases. In particular, 70% of the entire country is in mountainous area, and the quantity of large - scale tunnel tunnels is rapidly increasing due to the inevitability of design considering optimal linear conditions.
The current maintenance is checked and diagnosed according to the period or level specified in the Special Law on Facilities Safety Management, and the most important basic survey in this process is the visual inspection, which is performed by visual inspection.
However, since the inspection by the naked eye depends on the supervision of the inspectors, omission or errors may lead to major accidents, and precise and objective inspection results are necessary.
In particular, the progress of cracks in tunnels is an important issue, and it is difficult to grasp trends based on existing visual inspection results.
In order to solve such a problem, a device for measuring the anomaly occurred in the tunnel by photographing the appearance of the inner surface of the tunnel has been developed. However, when analyzing the captured image, the conventional device compares only the initial construction drawing with the photographed image, Other misleading analysis results were obtained.
In addition, since the conventional apparatus does not have a shape corresponding to a semicircular or semi-elliptic tunnel, there is a distortion in the photographed image, and an error occurs when analyzing the image because the light can not be uniformly supplied into the tunnel. In addition, the camera of the conventional apparatus is fixed to the apparatus, and flexible photographing can not be performed corresponding to the size or shape of the tunnel.
Therefore, it is required to develop a tunnel crack inspection apparatus and an inspection method that can more accurately analyze cracks occurring in a tunnel.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a tunnel crack inspection system capable of inspecting all structures in tunnels such as structural cracks, spots, leaks, roughening of auxiliary facilities, electrical attachments and bolts, And a control method thereof.
Specifically, the present invention aims at inspecting the inner surface of the tunnel which is objective and reliable.
It is another object of the present invention to obtain a clear image by supplying uniform illumination during inspection.
It is also an object of the present invention to provide a user with an apparatus for inspecting a crack occurring in an internal structure such as a shelter by using a frame bar.
It is another object of the present invention to correspond to the inside of a semicircular or semi-elliptic tunnel by arranging the camera on the curved surface of the apparatus.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.
There is provided an apparatus for inspecting a crack in a tunnel, comprising: a plurality of cameras for capturing an image of an inner surface of a tunnel; an illuminating lamp for supplying light to the inner surface of the tunnel to acquire the image; A 3D laser scanner for irradiating a laser beam to the surface of the tunnel to acquire first information on the curvature of the inner surface of the tunnel, a controller for analyzing a crack existing on the inner surface of the tunnel, A body to which the control unit is mounted and a moving means for moving the body along the tunnel, wherein the body is in the form of a fan-shaped column determined according to the shape of the inner surface of the tunnel, The plurality of cameras being mounted in a row in a part thereof, Followed by column and row generates a first image, and wherein it is possible to produce a second information about the cracking of the inner surface of the tunnel by using the first image and the first information.
In addition, the second information may include information on length, depth and width of the crack, whether the crack has occurred, peeling, and peeling.
The apparatus may further include a plurality of frame bars movable in an outward direction of the curved surface of the body, wherein each of the plurality of cameras is fixed to an end of each of the plurality of frame bars, The moving distance is controlled to be determined in accordance with the distance from the camera fixed to the end of each of the plurality of frame bars to the inner surface of the tunnel, and each of the plurality of frame bars can be controlled to move by the determined distance .
In addition, the illumination lamp is a plurality of LEDs, and each of the plurality of LEDs is arranged adjacent to a part of the curved surface of the body to supply light.
According to another aspect of the present invention, there is provided a method for inspecting a crack in a tunnel, the method comprising: moving the tunnel along a tunnel using the tunnel crack inspection apparatus according to
In the first step, light is supplied to the inner surface of the tunnel using a plurality of LEDs arranged adjacent to each other, and an image of the inner surface of the tunnel is obtained.
The tunnel crack inspection apparatus may further include a plurality of frame bars movable in an outward direction of the curved surface of the body, each of the plurality of cameras being fixed to an end of each of the plurality of frame bars, And moving each of the plurality of frame bars corresponding to the distance from the camera fixed to the end of each of the plurality of frame bars to the inner surface of the tunnel.
The present invention can provide a user with a tunnel crack inspection apparatus and a control method thereof that can be inspected for all structures in tunnels such as rooftops, electrical attachments and bolts of auxiliary facilities in addition to structural cracks, whitewash, leaks, and peeling of tunnels.
Specifically, the present invention can inspect the inner surface of the tunnel that is objective and reliable.
In addition, the present invention can obtain a clear image by supplying uniform illumination when proceeding with inspection.
Further, the present invention can provide a user with an apparatus capable of inspecting a crack occurring in an internal structure such as a shelter by using a frame bar.
In addition, the present invention can correspond to a semicircular or semi-elliptical tunnel inside a camera by arranging the camera on the curved surface of the apparatus.
It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
1 is a block diagram of a tunnel crack inspection apparatus according to an embodiment of the present invention.
2 is a perspective view of a tunnel crack inspection apparatus according to an embodiment of the present invention.
3 is a front view of a tunnel crack inspection apparatus according to an embodiment of the present invention.
4 is an end view of an actual view generated using bending information obtained by a 3D laser scanner according to an embodiment of the present invention.
Figure 5 is a side view of a construction drawing of an internally stored tunnel according to one embodiment of the present invention.
6 is an image obtained by horizontally joining images obtained by a camera of a tunnel crack inspection apparatus according to an embodiment of the present invention.
FIG. 7 is an image obtained by vertically joining horizontally combined images according to an embodiment of the present invention.
8 is an image of an inner surface of a tunnel obtained by combining images acquired by a camera according to an embodiment of the present invention.
9 is a photograph of a tunnel crack inspection apparatus according to an embodiment of the present invention.
10 is a tunnel image acquired using a general illumination light according to an embodiment of the present invention.
11 is a tunnel image acquired using LED side illumination according to an embodiment of the present invention.
12 is a perspective view showing a tunnel crack inspection apparatus having a frame bar according to an embodiment of the present invention.
13 is a side view of a tunnel crack inspection apparatus having a frame bar according to an embodiment of the present invention.
FIG. 14 is a photograph showing a frame bar moved according to an embodiment of the present invention to inspect the inner surface of the tunnel.
Due to the nature of Korea, where about 70% of the country is mountainous, there is a great need for tunnels to pass cars or trains. These tunnels are essential for safety and maintenance. Conventionally, in order to judge whether or not a problem of such a tunnel has occurred, the inspection is visually inspected by the administrator when the appearance inspection is performed, which causes a problem that omission or error may occur.
To solve this problem, a device for analyzing cracks in the inner surface of the tunnel has been developed. However, the conventional apparatus has a problem that it is not suitable to acquire an image in a fixed position of a camera and inspect cracks of various types of tunnels.
In order to solve the problems of the conventional apparatus, a tunnel crack inspection apparatus having a 3D laser scanner and a camera disposed on a curved surface has been developed.
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.
1 is a block diagram of a tunnel crack inspection apparatus according to an embodiment of the present invention.
The tunnel crack inspection apparatus includes a
However, the components shown in Fig. 1 are not essential, so that a tunnel crack inspection apparatus having components having more components or fewer components may be implemented.
Hereinafter, the components will be described in order.
The
The mobile communication module 111 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network.
The
The short-
The position information module 114 is a module for obtaining the position of the tunnel crack inspection apparatus, and a representative example thereof is a Global Position System (GPS) module. According to the present technology, the GPS module calculates distance information and accurate time information from three or more satellites, and then applies trigonometry to the calculated information to obtain three-dimensional current position information according to latitude, longitude, and altitude It can be calculated accurately. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module can calculate speed information by continuously calculating the current position in real time.
Referring to FIG. 1, the
The image frame processed by the
The
It is also possible to sense whether the
The
The
The
The
The
Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the
There may be two or
(Hereinafter, referred to as a 'touch screen') in which a
The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the
If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller (not shown). The touch controller processes the signal (s) and transmits the corresponding data to the
The audio output module 152 can output audio data received from the
The
The
The
The
The
When the
The
The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.
According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the
According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings based on the above-described configurations.
2 and 3 are a perspective view and a front view of a tunnel crack inspection apparatus according to an embodiment of the present invention.
2 and 3, the tunnel crack inspection apparatus includes a
However, the components shown in Figs. 2 and 3 are not essential, and a tunnel crack inspection apparatus having components having more components or fewer components may be implemented.
2 and 3, the
A plurality of
Next, a plurality of
The
In addition, if the image extending in the horizontal direction is in the vertical direction, the entire image acquired by the plurality of
Next, the
4 is an end view of an actual view generated using bending information obtained by a 3D laser scanner according to an embodiment of the present invention.
5 is an end view of the construction drawing of the inner surface of the tunnel previously stored according to an embodiment of the present invention.
The
As described above, the irregularity information for the entire inner surface of the tunnel can be generated by using the
The
Next, the
A process of the
6 is an image obtained by horizontally joining images obtained by a camera of a tunnel crack inspection apparatus according to an embodiment of the present invention.
7 is an image obtained by vertically joining horizontally combined images according to an embodiment of the present invention.
8 is an image of an inner surface of a tunnel obtained by combining images acquired by a camera according to an embodiment of the present invention.
Since the
Since the
Next, the
When a plurality of first images are combined, the images acquired at the same time must be combined. If the time does not match, a misalignment may occur between the plurality of first images in the second image, resulting in an error in the result.
Through this process, an image of the inner surface of the tunnel as shown in FIG. 8 can be obtained.
However, in the process of combining images acquired by a plurality of cameras, it is not essential that the images of the respective cameras are horizontally connected and vertically connected, and a step of vertically connecting images of a plurality of cameras and then horizontally connecting .
Also, it is possible to acquire the image of the inner surface of the tunnel by connecting the acquired image vertically and horizontally by one step.
Next, the
The
The information about the crack generated by the
Next, the
On the other hand, a plurality of LEDs 311 may be used for the
9 is a photograph of a tunnel crack inspection apparatus according to an embodiment of the present invention. Referring to FIG. 9, a plurality of LEDs 311 are arranged adjacent to each other on a curved surface of a
By using the
By using the
10 is a tunnel image acquired using a general illumination light according to an embodiment of the present invention.
11 is a tunnel image obtained using the LED surface illumination according to an embodiment of the present invention.
Compared with FIG. 10, in FIG. 11, light is uniformly supplied and cracks existing in the tunnel are expressed more finely. That is, by using the
Next, the
The
12 is a perspective view showing a tunnel crack inspection apparatus having a frame bar according to an embodiment of the present invention.
13 is a side view showing a tunnel crack inspection apparatus having a frame bar according to an embodiment of the present invention.
12 and 13, a
For example, if the inside of the tunnel for crack inspection is large, the
FIG. 14 is a photograph showing an inner surface of a tunnel moved by moving a frame bar according to an embodiment of the present invention. As shown in FIG. 14, the image of the inner surface of the tunnel can be acquired by extending the
The length of movement of each
Next, the moving means 500 is means for moving the
Hereinafter, a tunnel crack inspection method will be described in detail based on the above-described configurations.
An image of the inner surface of the tunnel is acquired using a plurality of
The plurality of
Next, each of the plurality of
Since the plurality of
Next, a third image, which is an image of the inner surface of the tunnel, is generated vertically with the plurality of first images (S300).
When a plurality of images extending in the horizontal direction are in the vertical direction, a full image of the inner surface of the tunnel can be obtained.
Next, an actual view of the inner surface of the tunnel is generated using the first information (S400).
Next, in step S500, the construction information of the inner surface of the tunnel is compared with the actual view to generate second information related to the unevenness of the inner surface of the tunnel.
Next, the second information and the second image are used to generate third information regarding the cracks in the inner surface of the tunnel (S600).
It is to be understood that the above-described embodiments of the apparatus and method for inspecting a crack in a tunnel can not be limitedly applied to the construction and method of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively As shown in FIG.
By applying the above-described configuration, it is possible to inspect the inner surface of the tunnel which is objective and reliable.
Specifically, the present invention can provide a user with a device capable of inspecting all structures in tunnels such as roughened surfaces, electrical attachments, and bolts in addition to structural cracks, white spots, leaks, and peeling of tunnels.
In addition, the present invention can obtain a clear image by supplying uniform illumination when proceeding with inspection.
In addition, the present invention can provide a user with an apparatus that can detect an image of an internal structure such as a shelter and check a crack by corresponding to a tunnel size by using a frame bar.
In addition, the present invention can correspond to a semicircular or semi-elliptical tunnel inside a camera by arranging the camera on the curved surface of the apparatus.
It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.
120: camera
151:
140: 3D laser scanner
180:
200: Body
300: lighting light
310: LED surface lighting
400: frame bar
500: Moving means
Claims (7)
An illumination lamp for supplying light to the inner surface of the tunnel to acquire the image;
A 3D laser scanner for irradiating the inner surface of the tunnel with laser to acquire first information about the curvature of the inner surface of the tunnel;
A controller for analyzing a crack existing in the inner surface of the tunnel;
A body on which the plurality of cameras, the illumination lamp, the 3D laser scanner, and the control unit are mounted; And
And moving means for moving the body along the tunnel,
The body is in the form of a fan-shaped column determined according to the shape of the inner surface of the tunnel,
Wherein the plurality of cameras are mounted in series on at least a part of curved surfaces of the body,
Wherein,
Generating a first image by traversing each of a plurality of images acquired by each of the plurality of cameras in a column and a row,
Generating a second image that is an image of one end surface of the tunnel inner surface from the first information, comparing the third image, which is an end surface image of the previously stored tunnel inner surface construction drawing, with the second image, Information,
Generating second information on cracks in the inner surface of the tunnel using the unevenness information and the first image,
Further comprising: a plurality of frame bars movable in an outward direction of a curved surface of the body,
Wherein each of the plurality of cameras is fixed to an end of each of the plurality of frame bars,
Wherein,
The control unit controls the moving distance of each of the plurality of frame bars to be determined corresponding to the distance from the camera fixed to the end of each of the plurality of frame bars to the inner surface of the tunnel,
And controls each of the plurality of frame bars to move by the determined distance.
Wherein the second information includes information on the length, depth and width of the crack, and information on whether the crack has occurred, peeling, and peeling off.
The illumination lamp is a plurality of LEDs,
Wherein each of the plurality of LEDs is arranged adjacent to a part of a curved surface of the body to supply light.
A second step of generating a first image in a column and a row in a plurality of images obtained by each of the plurality of cameras;
A third step of generating, from the first information, a second image that is an image of an end surface of the tunnel inner surface;
A fourth step of comparing irregularity information of the inner surface of the tunnel by comparing the third image, which is an image of one end surface of the tunnel inner surface construction drawing, with the second image; And
And generating second information on cracks in the inner surface of the tunnel using the unevenness information and the first image,
The tunnel crack inspection apparatus further includes a plurality of frame bars movable in an outward direction of the curved surface of the body,
Wherein each of the plurality of cameras is fixed to an end of each of the plurality of frame bars,
Before the first step,
Further comprising moving each of the plurality of frame bars corresponding to a distance from a camera fixed to an end of each of the plurality of frame bars to an inner surface of the tunnel.
Wherein the first step supplies light to the inner surface of the tunnel using a plurality of LEDs arranged adjacent to each other and acquires an image of the inner surface of the tunnel.
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Cited By (13)
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KR101843923B1 (en) * | 2017-01-23 | 2018-03-30 | (주)태명이씨앤씨 | Tunnel Lining Inspection Apparatus using Plural Camera |
KR101865770B1 (en) * | 2017-10-23 | 2018-06-08 | 주식회사 이바다 | Tunnel crack and leak detection system |
CN108344550A (en) * | 2018-04-25 | 2018-07-31 | 广西大学 | A kind of gradual cracking destruction observation device of tunneling vibrational platform test structure model |
KR101922238B1 (en) * | 2017-11-09 | 2018-11-29 | (주)태명이씨앤씨 | Tunnel lining image data distributed parallel processing method, image data acquiring apparatus, and integrated software |
KR102001789B1 (en) * | 2018-12-05 | 2019-07-18 | 주식회사 엠텍 | Apparatus and Method for Inspecting damage of structure |
KR102107486B1 (en) * | 2019-01-04 | 2020-05-13 | 경북대학교 산학협력단 | Apparatus and method of tunnel crack image photographing, tunnel crack image photographing system including the apparatus |
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CN106546190B (en) * | 2016-11-30 | 2019-04-16 | 山西省交通科学研究院 | A kind of robot device and method for surface defects detection |
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KR101843923B1 (en) * | 2017-01-23 | 2018-03-30 | (주)태명이씨앤씨 | Tunnel Lining Inspection Apparatus using Plural Camera |
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CN108344550A (en) * | 2018-04-25 | 2018-07-31 | 广西大学 | A kind of gradual cracking destruction observation device of tunneling vibrational platform test structure model |
KR102001789B1 (en) * | 2018-12-05 | 2019-07-18 | 주식회사 엠텍 | Apparatus and Method for Inspecting damage of structure |
KR102107486B1 (en) * | 2019-01-04 | 2020-05-13 | 경북대학교 산학협력단 | Apparatus and method of tunnel crack image photographing, tunnel crack image photographing system including the apparatus |
KR102177686B1 (en) * | 2019-08-29 | 2020-11-11 | (주)엘라이트 | Automatic photography for tunnel inspection apparatus |
KR102270768B1 (en) | 2020-10-14 | 2021-06-30 | 주식회사 아워브레인 | System and method for measuring crack of tunnel surface |
KR20220168618A (en) | 2021-06-16 | 2022-12-26 | 한국생산기술연구원 | An apparatus for driving with multiple degrees of freedom to inspect the wall of a common duct, and a method for inspecting the wall of a common duct using the same |
KR102512016B1 (en) * | 2021-10-14 | 2023-03-20 | 한국건설기술연구원 | Concrete damage detection system, method, and a recording medium recording a computer readable program for executing the method |
WO2024062896A1 (en) * | 2022-09-22 | 2024-03-28 | 富士フイルム株式会社 | Imaging device |
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