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KR-102961433-B1 - Apparatus for inspecting crack in tunnel and method for crack control using the same

KR102961433B1KR 102961433 B1KR102961433 B1KR 102961433B1KR-102961433-B1

Abstract

The present invention relates to a tunnel crack monitoring device and a crack management method using the same, comprising a fixed measuring unit in which one or more shooting units, each consisting of a combination of a camera and a light, are fixedly installed, and a variable measuring unit in which a laser measuring unit is installed to move in three dimensions and measure on one side of the fixed measuring unit, and a control unit that generates a control signal for the variable measuring unit from the measurement data of the fixed measuring unit to approach the crack and take precise shots when the crack progresses.

Inventors

  • 장원락

Assignees

  • 에이아이안전연구원 주식회사

Dates

Publication Date
20260507
Application Date
20220119

Claims (6)

  1. A fixed measuring unit comprising a combination of a camera and lighting, and multiple fixed measuring units provided on the entire first frame that maintains a curved or straight shape corresponding to the shape of the lining surface of a tunnel or box structure. A single laser measuring unit provided on the upper part of a bogie, which is one side of the first frame, is configured as a variable measuring unit installed on a second frame connected to move in three dimensions through a variable unit, and The above variable measuring unit is installed to move linearly along one of a plurality of guide rails provided in the second frame, and The above variable unit is configured as a multi-stage support connected to a bracket by a servo motor so as to be expandable while rotating, and is installed to be linearly variable so that the second frame moves three-dimensionally around a moving means. The above laser measuring unit comprises a laser generator installed inside a main body supported by a second frame to confirm the size, width, depth, and direction of the crack by laser, and a camera equipped with a focusing lens that captures the image of the laser line emitted from the laser generator. The above fixed measuring unit and variable measuring unit are connected to the upper side of a bogie equipped with a means of movement to move along a road or rail, and A tunnel crack monitoring device installed to enable selective precision monitoring through a laser measuring unit by generating a control signal for a variable measuring unit from the measurement data of the fixed measuring unit, after capturing the general appearance of the crack area by the camera of the fixed measuring unit and generating a control signal for the variable measuring unit from the measurement data of the fixed measuring unit.
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  4. A tunnel crack monitoring device according to claim 1, characterized in that the variable measuring unit and the fixed measuring unit are installed with a gyroscope sensor that detects a three-dimensional position.
  5. A step of storing crack data measured by the fixed measuring unit of claim 1; A step of comparing existing data regarding cracks stored by a fixed measurement unit with newly measured data currently measured; A step of transmitting position data of the corresponding crack location to a control unit when the crack state changes to move the variable measuring unit in three dimensions, and precisely measuring the crack at the variable measuring unit; It consists of a step of precisely measuring the crack to confirm the size, width, depth, and direction of the crack, and The above control unit is, a) Take photographs of the cracks measured at the same location and same area at regular intervals and compare them, and b) Enlarge the photograph of the cracked area for comparison, and c) When the state of the crack changes, the variable measurement unit is operated to irradiate the crack with a laser line formed by a laser generator, and then the size, width, depth, and direction of the crack are confirmed using a camera equipped with a focusing lens, and the results are output through a communication unit connected to the control unit. d) A crack management method using a tunnel crack monitoring device that selectively performs precise monitoring through a laser measuring unit of a variable measurement unit when general photography and precise measurement of the crack area by a camera of a fixed measurement unit are desired.
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Description

Tunnel crack monitoring apparatus and crack management method using the same The present invention relates to a tunnel crack monitoring device and a crack management method using the same, comprising a fixed measuring unit in which one or more shooting units, each consisting of a combination of a camera and a light, are fixedly installed, and a variable measuring unit in which a laser measuring unit is installed to move in three dimensions and measure on one side of the fixed measuring unit, and a control unit that generates a control signal for the variable measuring unit from the measurement data of the fixed measuring unit to approach the crack and take precise shots when the crack progresses. Generally, the maintenance of facilities involves conducting precise safety inspections at scheduled intervals stipulated by regulations. Such precise safety inspections are designed to accurately assess the current state of the facility, identify changes from its initial or previously recorded condition, and verify whether the structure continues to satisfy current usage requirements. Furthermore, the aforementioned precise safety diagnosis is a close inspection that includes precise visual inspection and measurement processes using measuring equipment, performed to detect defective areas that cannot be easily found through the precise inspection process. In the maintenance plan for industrial infrastructure facilities through the aforementioned precision inspection and safety diagnosis, crack inspection is generally considered a target for inspecting significant damage. Conventionally, this was conducted by inspectors approaching the site carrying crack width scales or crack diameters to measure crack widths using an analog method and recording them in field logs. However, this method involved the inspector's objective judgment, making it difficult to secure systematic and objective data. Furthermore, measurements using crack width scales or crack diameters had the disadvantage of requiring significant time and manpower, as each crack had to be visually inspected individually. Furthermore, regarding tunnel lining, the progression of cracks is of paramount importance, and it is difficult to identify such trends based on conventional visual inspection results. To address this problem, a device was developed to measure abnormalities occurring in the tunnel by photographing the exterior of the tunnel's inner surface; however, conventional devices analyzed cracks by comparing only the initial construction drawings with the captured photos, leading to incorrect analysis results. Therefore, there is a need to develop tunnel crack inspection devices and methods capable of analyzing cracks occurring in tunnels more accurately. To improve upon such problems, the technology of a crack measurement device and method using images is disclosed in Patent No. 816826 by the applicant of the present invention, and its configuration, as shown in FIG. 1, comprises: a step of setting a sampling interval for measuring the crack shape and crack width of a crack area; a step of capturing and processing an image of the crack area after firing a line across the crack area; a step of calculating coordinate values and angle data of the crack shape based on the processed image when the current time point reaches the sampling interval for measuring the crack shape; a step of calculating the crack width based on the processed image when the current time point reaches the sampling interval for measuring the crack width; and a step of performing various evaluations of the crack area based on the calculated crack shape and crack width data. However, the crack measurement device and method using the above-mentioned image have a problem in that, when uniformity is widely present, not only does the measurement time increase, but accurate measurement also becomes difficult. In addition, there is a disadvantage in that it is difficult to check whether the crack is progressing, making post-crack management difficult. FIG. 1 is a flowchart illustrating a conventional crack measurement device and method. FIG. 2 is a schematic diagram illustrating a monitoring device according to the present invention. FIG. 3 is a side view illustrating the operating state of a monitoring device according to the present invention. FIG. 4 is a block diagram illustrating a sensing device according to the present invention. FIGS. 5 and FIGS. 6 are flowcharts illustrating the operating state of a monitoring device according to the present invention. Hereinafter, embodiments of the present invention will be described in detail based on the attached drawings. As illustrated in FIGS. 2 to 6, the tunnel crack monitoring device (100) of the present invention is configured such that a fixed measuring part (110) and a variable measuring part (150) are integrally installed on the upper side of a moving means (300). At this time, the above-mentioned means of transportation (300) is equ