KR101409814B1

KR101409814B1 - Apparatus For Detecting Crack

Info

Publication number: KR101409814B1
Application number: KR1020140037830A
Authority: KR
Inventors: 김대해; 윤문희
Original assignee: 주식회사 한국국토안전연구원
Priority date: 2014-03-31
Filing date: 2014-03-31
Publication date: 2014-06-24

Abstract

A crack measuring apparatus according to the present invention includes a body 100 having a space inside thereof and having a front surface 103 opened, a front surface 103 coupled to one surface 103 of the opened main body 100, And the other surface 103 of the main body 100 facing the one surface 103 of the main body 100 is formed so as to be spaced apart from the measurement plate 130 by a predetermined distance D, A photographing means 140 for photographing a crack seen through the scale 135 and the measuring plate 130 and a photographing means 140 attached to the side surface of the main body 100 for moving the main body 100, When the main body 100 is moved in one direction as the wheel 160 rotates, the photographing unit 140 can photograph the information captured by the scale 135 together with the scale 135, .

Description

Apparatus For Detecting Crack

The present invention relates to a crack measuring apparatus.

Concrete has a characteristic of being resistant to compression, but relatively weak in tensile strength. Due to these weak tensile properties, cracks, which greatly affect the stability, durability, and usability of concrete structures, are becoming serious degradation problems. Measurement and analysis of concrete surface cracks are one of the most basic and important tasks in terms of maintenance of concrete structures as one of the investigation and diagnosis items for diagnosis of concrete structures, life prediction and so on.

Conventional crack management was performed by visual inspection of the inspectors and measurement of cracks using equipment such as crack magnifiers and by directly recording characteristics of cracks. However, such conventional crack management requires a lot of time and manpower, and inspectors are subject to supervision. Therefore, not only objectivity is insufficient, but also structures can not be accessed, which is often difficult to measure. Therefore, studies are being conducted to automate and quantify problems with conventional crack management through image processing techniques.

Previous studies on concrete crack image processing have been conducted to investigate micro cracks using a microscope according to the size of the cracks and macro cracks macro-cracks). The former was mainly focused on quantitatively expressing the distribution of microcracks in concrete using image processing techniques, and the latter was focused on the study of accurately measuring crack width, length, and distribution. In particular, as disclosed in the patent documents of the following prior art documents, there has recently been proposed a technique for extracting cracks from a concrete surface crack image and measuring the crack width more accurately than conventional methods, Separable systems are also being developed.

However, there is still a lack of research on crack measurement devices using image processing techniques. Particularly, there is a problem that the crack width measuring apparatus developed in the past does not show much better results than the crack magnifier in crack detection, accuracy, and analytical ability.

KR 10-2004-0011570 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art described above. One aspect of the present invention includes a transparent measuring plate marked with a scale and a photographing means for photographing a scale and a crack together, Which is capable of increasing the crack height.

A crack measuring apparatus according to an embodiment of the present invention includes a body having a space therein and having an open side, a measurement plate coupled to one side of the opened body and formed with a transparent scale, A photographing means coupled to the other surface of the main body facing the one surface of the main body so as to be spaced apart from the main body and photographing a crack visible through the scale and the measurement plate; And when the main body moves in one direction as the wheel rotates, the photographing means transmits information about the scale and the crack together to another electronic device.

In addition, in the crack measuring apparatus according to the embodiment of the present invention, the body is formed as a hexahedron having one surface and the other surface arranged in parallel.

Further, in the apparatus for measuring cracks according to an embodiment of the present invention, the apparatus further includes a handle coupled to the body and extending outward.

Further, in the crack measuring apparatus according to the embodiment of the present invention, the handle is coupled to the side surface of the main body, and the angle between the side surface and the side surface of the main body is adjustable.

Further, in the crack measuring apparatus according to an embodiment of the present invention, the apparatus further includes light emitting means coupled to the body, for emitting light in the cracking direction.

Further, in the crack measuring apparatus according to the embodiment of the present invention, the photographing means is a camera.

Further, in the crack measuring apparatus according to the embodiment of the present invention, the photographing means transmits information photographed by radio to the electronic apparatus.

The crack measuring apparatus according to an embodiment of the present invention may further include a distance measuring unit connected to the wheel and measuring a distance the main body moves based on the number of revolutions of the wheel.

In the crack measuring apparatus according to the embodiment of the present invention, one surface is fixed to the other surface of the main body, a first recessed portion recessed in the thickness direction is formed on one surface, and a second recessed portion recessed in the thickness direction is formed on the other surface. A third concave portion that is recessed from one side surface in the center direction and connected to the first concave portion and the second concave portion and is depressed in the center direction from the other side surface to form the first concave portion and the second concave portion, A second concave portion formed in a shape corresponding to the second concave portion and having one side inserted into the second concave portion and the other side coupled to the photographing means, A first pivoting part pivoted vertically from one surface of the second fastening part to be in contact with the third recessed part and having a first projection formed at a distal end thereof engaged with the first recessed part, And a second turning part which is pivoted so as to protrude vertically from one surface and which is in contact with the fourth concave part and in which the second projection formed at the distal end is caught by the first concave part.

Further, in the crack measuring apparatus according to the embodiment of the present invention, it is preferable that the apparatus further comprises an extension part for moving the second rotary part in a direction away from the second coupling part, Direction.

In the crack measuring apparatus according to an embodiment of the present invention, the apparatus further includes a support rod extending from a side surface of the main body to the image capturing means and supporting a side surface of the image capturing means.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, it is possible to enhance the detection, accuracy, and analysis capability of cracks by providing a transparent measurement plate marked with a scale and a photographing means for photographing the scale and the crack together.

In addition, according to the present invention, it is possible to simultaneously capture a scale and a crack while moving by using a wheel, and thus it is easy to measure a crack over a certain range.

1 and 2 are perspective views of a crack measuring apparatus according to an embodiment of the present invention,
3 is a side view of a crack measuring apparatus according to an embodiment of the present invention,
FIG. 4 is a plan view of a crack measuring apparatus according to an embodiment of the present invention,
5 is an exploded perspective view of the other surface of the first fastening part and the main body of the crack measuring apparatus according to the embodiment of the present invention,
6 is a perspective view illustrating the operation of the second fastening part of the crack measuring apparatus according to the embodiment of the present invention,
FIGS. 7 to 8 are perspective views showing the coupling relationship of the first fastening portion, the second fastening portion, and the photographing means of the crack measuring apparatus according to the embodiment of the present invention, and FIGS.
9 to 10 are conceptual diagrams illustrating a process of measuring cracks in a tunnel using a crack measuring apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "first "," second ", and the like are used to distinguish one element from another element, and the element is not limited thereto. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are perspective views of a crack measuring apparatus according to an embodiment of the present invention, and FIG. 3 is a side view of a crack measuring apparatus according to an embodiment of the present invention.

1 to 3, a crack measuring apparatus according to an embodiment of the present invention includes a main body 100 having a space therein and an open side 103, a side 103 of the opened main body 100, A body 100 facing the one surface 103 of the body 100 so as to be spaced apart from the measuring plate 130 by a predetermined distance D, A photographing means 140 which is coupled to the other surface 105 of the main body 100 and photographs a crack seen through the scale 135 and the measurement plate 130, When the main body 100 is moved in one direction as the wheel 160 rotates, the photographing means 140 photographs information obtained by photographing the scale 135 together with the scale 135 in a separate electronic device .

The main body 100 may be formed as a hexahedron having one side 103 and the other side 105 arranged in parallel, for example, a rectangular parallelepiped. Here, the main body 100 may be formed of a frame 107 constituting an outer frame, a support bar 108 supporting the frame 107, a plate 109 constituting the surface, and the like. At this time, the main body 100 is provided with a space therein, one side 103 is opened, and the other side 105 facing the side 103 can be closed by the plate 109. A measurement plate 130 is coupled to one surface 103 of the opened main body 100 and a photographing means 140 is coupled to the other surface 105 of the closed main body 100. Therefore, the measuring plate 130 and the photographing means 140 can be arranged to be spaced apart from each other by a predetermined distance D (see FIG. 3). A handle 110 may be coupled to the side surface of the main body 100 (see FIG. 1). One end of the handle 110 is disposed between the flanges 113 protruding in parallel from the side surface of the main body 100. The flange 113 is inserted into the hole 115 formed in the flange 113, ). &Lt; / RTI > At this time, the flange 113 has a plurality of holes 115, and the angle between the handle 110 and the side surface of the main body 100 can be adjusted according to the position where the pin 117 is inserted. The handle 110 may be used when an operator grasps and takes a picture of a crack with the photographing means 140 while moving the main body 100. Meanwhile, the main body 100 may be provided with at least one light emitting means 120 for emitting light in a cracking direction. Here, the light emitting means 120 may be a flashlight, and may be coupled to the inner surface of the main body 100 or to the outer surface thereof. For example, an engaging portion 123 protruding in a " C "shape may be formed on the outer surface of the main body 100, and a clipping type light emitting means 120 may be coupled to the engaging portion 123 have. Alternatively, the clip-shaped light emitting means 120 may be coupled to the opening 109a formed in the plate 109 constituting the side surface of the main body 100. [ The light emitting means 120 irradiates light to the crack so that the photographing means 140, which will be described later, can measure the crack even in a dark environment such as a tunnel.

The measurement plate 130 may be formed in a rectangular shape as a whole and may be coupled to one surface 103 of the opened main body 100. Here, the measuring plate 130 is formed in a transparent manner and a scale 135 is displayed. At this time, the scale 135 may be displayed in a cross shape, and the scale 135 may be photographed by the photographing means 140 together with the crack to be a reference for measuring the width of the crack, the length of the crack, and the like.

The photographing means 140 photographs the scale 135 of the measuring plate 130 and the crack 135 together. Specifically, as shown in FIG. 4, the photographing means 140 photographs the crack 135 of the measuring plate 130 and the crack C passing through the transparent measuring plate 130 together. Thus, the width of the crack C, the length of the crack C, and the like can be determined based on the scale 135 of the measurement plate 130 through the information that the photographing means 140 photographs the scale 135 and the crack C together Can be determined. On the other hand, information taken by the photographing means 140 together with the scale 135 and the crack C is transmitted to a separate electronic device. 3, the photographing means 140 may have a function of zooming in and zooming out (see arrows in FIG. 3). Therefore, when the width of the crack is relatively small, the image can be zoomed in and the zoom can be taken when the width of the crack is relatively large. In addition, the photographing means 140 can transmit information photographed by wireless such as WiFi or Bluetooth to the electronic device. The above-described electronic device is not particularly limited as long as it can receive the photographed information by the photographing means 140. For example, a laptop, a desktop, a personal digital assistant (PDA), a tablet, Or a smart phone.

The photographing means 140 is coupled to the other surface 105 of the main body 100 facing the one surface 103 of the main body 100 to which the measurement plate 130 is coupled. Therefore, the photographing means 140 maintains a constant distance D from the scale 135 of the measuring plate 130 at all times, thereby enhancing the detection, accuracy, and analysis of cracks.

In order to fix the photographing means 140 to the other surface 105 of the main body 100, the first fastening portion 141 and the second fastening portion 143 may be included. As shown in FIG. 5, the first fastening part 141 may be formed in a cylindrical shape as a whole, and one side of the first fastening part 141 may be fixed to the other surface 105 of the body 100 with bolts 142. At this time, the first coupling part 141 may include first, second, third, and fourth concave parts 141a, 141b, 141c, and 141d. Specifically, the first concave portion 141a is recessed in the thickness direction on one surface of the first coupling portion 141, and the second concave portion 141b is formed on the other surface of the first coupling portion 141 in the thickness direction . The third concave portion 141c is formed so as to be embedded in the first concave portion 141a and the second concave portion 141b so as to be embedded in the center direction from one side of the first coupling portion 141, The portion 141d is formed so as to be recessed in the center direction from the other side of the second fastening portion 143 and connected to the first recess 141a and the second recess 141b. 5 to 8, the second fastening portion 143 is formed in a shape corresponding to the second recess 141b, one side of which is inserted into the second recess 141b, The photographing means 140 is combined. The first turning portion 145 is rotated so as to protrude vertically from one surface of the second fastening portion 143 so that the first turning portion 145 is in contact with the third concave portion 141c and the first projection 145a formed at the distal end thereof contacts the first And is caught by the concave portion 141a. Similarly, the second turning portion 147 is rotated to protrude vertically from one surface of the second coupling portion 143, and is brought into contact with the fourth concave portion 141d, and the second projection 147a formed at the distal end thereof And is engaged with the first recess 141a. That is, after the first and second rotary parts 145 and 147 are rotated so as to protrude vertically from one surface of the second coupling part 143, the first rotary part 145a of the first rotary part 145, And the second projection 147a of the second rotary part 147 are engaged with the first recess 141a of the first coupling part 141 so that the second coupling part 143 is engaged with the first coupling part 141, Lt; / RTI > In addition, it may further include an extending portion 149 for moving the second turning portion 147 in a direction away from the second fastening portion 143. At this time, if the extension 149 is disposed inside the second fastening portion 143 and a force acts in the direction away from the second fastening portion 143, the extension 149 moves in a direction away from the second fastening portion 143, The second pivoting portion 147 coupled to the end of the second pivoting portion 143 can also be moved away from the second pivoting portion 143. The extended portion 149 is connected to the second coupling portion 143 by a spring or the like so that an elastic force can be applied to the extended portion 149 in a direction approaching the second coupling portion 143. As a result of this elastic force, the second rotary part 147 and the first rotary part 145 are engaged with the first coupling part 141 (141) ). &Lt; / RTI >

In addition, as shown in Figs. 1-2, a support rod 150 may be provided to support the imaging means 140. Fig. Here, the support rod 150 may extend from the side surface of the main body 100 to the photographing means 140 to support the side surface of the photographing means 140. In this manner, the supporting rod 150 supports the side surface of the photographing means 140, thereby preventing the photographing means 140 from being shaken.

The wheel 160 serves to move the main body 100, and four wheels 160 may be provided on a side surface of the main body 100. Here, the wheel 160 may be disposed close to the measuring plate 130 on the side surface of the main body 100 so that the measuring plate 130 faces the crack. With this wheel 160, an operator can grasp the handle 110 and move the main body 100 in one direction. Since the photographing unit 140 simultaneously measures the scale 135 of the measuring plate 130 while moving the main body 100 in one direction, it is easy to measure the cracks over a certain range. The distance measuring device 170 may measure the distance that the main body 100 moves based on the number of revolutions of the wheel 160. Here, the distance measuring instrument 170 may be disposed inside the main body 100, and may be connected to one wheel 160 to measure the distance the main body 100 moves. At this time, the distance measuring instrument 170 can use a meter, although it is not particularly limited as long as the distance that the body 100 moves can be measured.

The crack measuring apparatus according to an embodiment of the present invention can be used to measure cracks in all structures, but can be used particularly to measure cracks in tunnels.

9 to 10 are conceptual diagrams illustrating a process of measuring cracks in a tunnel using a crack measuring apparatus according to an embodiment of the present invention.

First, as shown in FIG. 9, the operator grasps the handle 110, lifts the main body 100, and places the measuring plate 130 so as to face the concrete surface 300 of the tunnel. At this time, the concrete surface 300 of the tunnel is irradiated with the light emitting means 120 so that the photographing means 140 can take a picture of the crack.

Next, as shown in FIG. 10, the operator can grasp the handle 110 and move the main body 100 in one direction, while starting the photographing with the photographing means 140. At this time, the main body 100 moves in one direction with a certain distance from the concrete surface 300 by the wheels 160 provided on the side surface of the main body 100. Thus, while the main body 100 is moving, the photographing means 140 photographs the scale of the measurement plate 130 and the cracks of the concrete surface 300 together. Therefore, it is easy to measure the cracks on the concrete surface 300 of the long tunnel. The photographing means 140 and the measurement plate 130 coupled to the main body 100 maintain a constant distance D at all times, and thus have high detection, accuracy, and analysis capability of cracks. Meanwhile, the information photographed by the photographing means 140 may be transmitted to another electronic device 200 and stored. Accordingly, it is possible not only to analyze the cracks of the concrete surface 300 in real time, but also to analyze the overall cracks after storing them in the electronic device 200.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: main body 103: one side of the main body
105: Face of the main body 107: Frame
108: support bar 109: plate
109a: opening 110: handle
113: flange 115: hole
117: pin 120: light emitting means
123: engaging portion 130: measuring plate
135: scale 140: photographing means
141: first fastening part 141a: first concave part
141b: second concave portion 141c: third concave portion
141d: fourth concave portion 142: bolt
143: second fastening part 145: first fastening part
145a: first projection 147: second east portion
147a: second projection 149: extension part
150: support rod 160:
170: Distance meter 200: Electronic device
300: Concrete surface C: Crack
D: Distance between the measuring plate and the photographing means

Claims

A body provided with a space therein and opened at one side;
A measuring plate coupled to one side of the opened main body and having a transparent mark formed therein;
A photographing means coupled to the other surface of the main body facing the one surface of the main body so as to be spaced apart from the measurement plate by a predetermined distance and photographing a crack visible through the scale and the measurement plate; And
A wheel provided on a side surface of the main body so that the main body moves;
Lt; / RTI >
And when the main body moves in one direction as the wheel rotates, the photographing means transmits the photographed information of the scale and the crack together to a separate electronic device.

The method according to claim 1,
Wherein the main body is formed by a hexahedron having one surface and the other surface arranged in parallel.

The method according to claim 1,
A handle coupled to the body and extending outwardly;
Further comprising:

The method of claim 3,
Wherein the handle is coupled to a side surface of the main body, the angle of which is adjustable with respect to a side surface of the main body.

The method according to claim 1,
Light emitting means coupled to the body for emitting light in the cracking direction;
Further comprising:

The method according to claim 1,
Wherein the photographing means is a camera.

The method according to claim 1,
Wherein the photographing means transmits information photographed by radio to the electronic device.

The method according to claim 1,
A distance measuring unit, connected to the wheel, for measuring a distance traveled by the main body based on the number of rotations of the wheel;
Further comprising:

The method according to claim 1,
A first concave portion formed on one side of the body and having a first concave portion recessed in the thickness direction thereof and a second concave portion recessed in the thickness direction on the other side thereof, And a third concave portion connected to the second concave portion, the first concave portion being recessed in the center direction from the other side to form a fourth concave portion connected to the first concave portion and the second concave portion;
A second coupling part formed in a shape corresponding to the second concave part and having one side inserted into the second concave part and the photographing means coupled to the other side;
A first pivoting part pivoted vertically from one surface of the second fastening part to be in contact with the third recessed part and having a first projection formed on a distal end thereof engaged with the first recessed part; And
A second pivoting part pivoted vertically from one surface of the second fastening part to be in contact with the fourth recess and having a second projection formed on the end thereof engaged with the first recessed part;
And a crack detector.

The method of claim 9,
An extension part for moving the second turning part in a direction away from the second fastening part;
Further comprising:
And an elastic force acts on the extended portion in a direction toward the second fastening portion.

The method according to claim 1,
A supporting rod extending from a side surface of the main body to the photographing means and supporting a side surface of the photographing means;
Further comprising: