KR20080106729A - Measuring method using movable tunnel displacement and working face visual information measuring system - Google Patents

Abstract

A measuring device using a system of measuring moving tunnel displacement and image information of a blind end plane is provided to maintain consistency of displacement measurement result irrespective of the knowledge and experience of an operator to secure specialty and reliability of a work. A system of measuring moving tunnel displacement and image information of a blind end plane includes a plurality of code targets(11) attached to a blind end plane of a tunnel, a point cloud generator(100) for generating point cloud on the blind end plane, a digital camera(200) for capturing the point cloud and image data of the code targets, a total station(300) for measuring three-dimensional absolute coordinates of the code targets, a computer(400) in which software generating a three-dimensional image using the image data and the three-dimensional absolute coordinates is installed, and a moving vehicle(500) in which the point cloud generator, the computer and the total station are mounted.

Description

Measuring method using Movable Tunnel Displacement and Working face Visual Information Measuring System}

1 is an overall configuration diagram of the present invention.

2 illustrates a slide rail 510 and a slide shelf 520 installed at the rear of the mobile vehicle 500.

3 illustrates a point cloud generated on the face of the point cloud generator 100.

4 shows the cord target 11, the scale bar 44, and the gray card 33 installed on the membrane surface.

FIG. 5 illustrates a screen provided through a monitor of a computer 400 in a process of performing 3D image processing analysis on a film surface using a photomodeler.

FIG. 6 illustrates a screen provided through a monitor of the computer 400 in the process of performing 3D image processing analysis on the inner plane using a PhotoModeler.

FIG. 7 illustrates a light reflection target 22 installed for each station on the inner plane and a process of generating a 3D image using the light reflection target 22.

<Explanation of symbols for the main parts of the drawings>

11: Code Target

22: Light reflection target

33: Gray Card

44: Scale Bar

100: point cloud generator

200: digital camera

300: Total Station

400: computer

500: mobile vehicle

510: slide rail

520: slide shelf

530: cylinder

535: load

540: opening

550: power supply

551: battery 552: inverter

600: Cam camera

610: lighting device

620: Video saver

630: monitor

700: laser scanner

Field of technology

The present invention is a measurement method using the image information measurement system of the tunnel displacement and the membrane surface, in more detail a plurality of code targets 11 are installed on the membrane surface of the tunnel; A point cloud generator 100 for generating a point cloud composed of images of light arranged in a lattice form on a tunnel face; A digital camera 200 which is synchronized with the point cloud generator 100 and captures the point cloud of the tunnel face generated by the point cloud generator 100 and the image data of the code target 11; Total station 300 for measuring the three-dimensional coordinates of the code target (11); A computer (400) in which software for generating a three-dimensional image is generated by using the image data photographed by the digital camera (200) and the three-dimensional coordinates of the code target (11) measured by the total station (300); And a mobile vehicle 500 in which the point cloud generator 100, the computer 400, and the total station 300 are installed.

Prior art

Observation and displacement measurement of the membrane and the inner surface during the existing tunnel construction were performed by subjective judgment as the worker moved directly in the tunnel.

Therefore, there is a problem that the deviation of the measurement result is severe according to the knowledge and experience of the operator, which deteriorates the professionalism and reliability of the work and the risk of safety accident due to the inadequate measurement management. There is also a problem that causes delays.

Therefore, there is an urgent need for the development of a new system that shortens the measurement and analysis time and secures the expertise and reliability of the measurement results.

The present invention created to solve the above problems is severe deviation of the measurement results according to the knowledge and experience of the operator to reduce the professionalism and reliability of the work and the risk of safety accidents due to poor management of the measurement neglected In addition, the present invention aims to provide a measurement method using a mobile tunnel displacement and a membrane image information measurement system that can reduce the time required for measurement and analysis.

The configuration of the present invention created to achieve the above object is as follows.

The measurement system used in the present invention includes a plurality of code targets 11 installed on the membrane face of the tunnel; A point cloud generator 100 for generating a point cloud composed of images of light arranged in a lattice form on a tunnel face; A digital camera 200 which is synchronized with the point cloud generator 100 and captures the point cloud of the tunnel face generated by the point cloud generator 100 and the image data of the code target 11; Total station 300 for measuring the three-dimensional absolute coordinates of the code target (11); A computer (400) in which software for generating a three-dimensional image is generated by using the image data photographed by the digital camera (200) and the three-dimensional absolute coordinates of the code target (11) measured by the total station (300); And a mobile vehicle 500 in which the point cloud generator 100, the computer 400, and the total station 300 are installed.

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

The code target 11 is installed at the membrane face of the tunnel, and as shown in FIG. 4, each code target 11 has a uniquely shaped reflective sheet that can be visually distinguished from other code targets 11. When the 3D image information processing analysis is attached, the analysis program serves as a matching point to automatically recognize / mark / reference the image information.

The code target 11 used in the present invention is a reflective sheet for identification having a unique shape attached to the surface of the rubber pad having a length of 10 cm in width and length, respectively, and is a double-sided tape attached to the back of the rubber pad. The code target 11 is fixed to the membrane surface by using.

The gray card 33 is used to correct digital image color information of a film surface that varies according to lighting or photographing equipment. In this embodiment, Awan sized product of A4 size is used.

The scale bar 44 serves as a reference for processing the actual size information of the tunnel face, which is a measurement object, when processing 3D image information.

The light reflection target 22 is not limited to the shape as shown in FIG. 7, and may be any shape capable of performing the function of light reflection.

The light reflection target 22 is installed on the inner surface of the tunnel instead of the membrane surface, and FIG. 7 illustrates a case in which three light reflection targets 22 (left, top, and right) are installed for each station. .

When measuring the hole displacement of the lower half after excavation of the lower half of the tunnel, five light reflecting targets 22 are installed for each station (top end, upper half left, upper half right, lower half left, and lower half right). Further light reflection target may be installed in the.

The point cloud generator 100 is mounted on the slide shelf 520 as shown in FIG. 2 and generates an image of light having a lattice shape as shown in FIG.

Although not shown separately in the accompanying drawings, the point cloud generator 100 is provided with a screen having a lattice shape, and light passing through the screen is arranged in a lattice shape at the tunnel face as shown in FIG. 3. The image of the light arranged as is the point cloud.

3 shows an image of six code targets 11 together with a point cloud. Each of the code targets 11 is attached with a unique reflective sheet. Even when shooting from different directions, the same code targets 11 are provided. Can be found easily.

Therefore, the software embedded in the computer 400 may automatically recognize and match the same code target 11 from the images photographed by the digital camera 200.

The point cloud generator 100 used in the present invention is not limited to an existing sales product such as a pro-spot or a pro spot, and a product that can generate a point cloud on a surface may be suitable for other models. You can choose to use.

The digital camera 200 photographs a curtain surface or an inner plane surface in various directions, and the photographed image data is input to the computer 400.

The digital camera 200 is synchronized with the point cloud generator 100 to take a picture.

In other words, the point cloud generator 100 is synchronized with the flash of the digital camera 200 and emits light at the same period as the shutter speed of the digital camera 200 to produce image information of numerous points on the screen. In other words, the point cloud, which is a set of numerous points generated on the screen, represents image information on the screen.

The digital camera 200 is a bar film or an air plane shooting in various directions, it is not fixed to the mobile vehicle, it is installed on the outside of the vehicle and moves while photographing.

Image information photographed by the digital camera 200 is preferably secured to shoot at least three locations so that the angle is more than 30 °, in the case of the present invention so that the angle is more than 30 ° with respect to the inner plane Photographed at three locations.

Even when shooting the inner plane, the shots were taken at three places with an angle of 30 ° or more for one project.

The total station 300 measures the three-dimensional absolute coordinates of the code target 11 or the light reflection target 22, and the measured three-dimensional coordinate values are input to the computer 400.

The total station 300 is installed to be detachably attached to the upper end of the rod 535 of the cylinder 530 is provided with a rod 535 to move up and down by hydraulic or pneumatic.

In the measurement using the total station 300, the rod 535 is raised, and the total station 300, which is detachably installed at the upper end of the rod 535, opens the opening 540 provided in the roof of the mobile vehicle 500. It passes through the upper part of the roof of the mobile vehicle 500 to perform a measurement operation such as a foresight or a backsight.

The computer 400 is mounted on a mobile vehicle and uses three-dimensional coordinates of the image data captured by the digital camera 200 and the three-dimensional coordinates of the code target 11 or the light reflection target 22 measured by the total station 300. There is a built-in program called PhotoModeler, a software that analyzes and creates dimensional images.

As described above, six code targets 11 are installed on the closed surface, because a program called a photo modeler requires at least six reference points for image information processing.

The mobile vehicle 500, as shown in Figs. 1 and 2, is a means by which components constituting the present invention are loaded or mounted and moved to a measurement position.

A slide rail 510 is installed at the rear of the mobile vehicle 500, and a slide shelf 520 is installed to be moved back and forth along the slide rail 510.

The point cloud generator 100, the cam camera 600, the lighting device 610, the video storage 620, and the power supply device 550 are installed in the slide shelf 520.

The cam camera 600 is for capturing a video, and the lighting device 610 provides lighting necessary for capturing the cam camera 600 or capturing the image data of the digital camera 200 and the video storage 620. ) Is an AVI recorder that stores a video taken by the cam camera 600.

In addition, a monitor 630 for checking a video captured by the cam camera 600 is provided separately in the vehicle. The video captured by the cam camera 600 may be checked in real time through the monitor 630, or may be checked by playing back the video stored in the video storage 620.

The power supply device 550 supplies power required for the operation of the system, and includes a battery 551 and an inverter 552 for converting direct current into alternating current.

The slide shelf 520 is moved rearward along the slide rail 510 during measurement to partially protrude to the rear of the mobile vehicle 500 to sufficiently secure the view of the cam camera 600 and the point cloud generator 100.

The laser scanner 700 is detachably coupled to the upper station 300 at the upper end of the rod 535 to be detachably coupled, and scans the 3D image of the tunnel face.

FIG. 5 illustrates a screen provided through a monitor of a computer 400 in a process of performing a 3D image processing analysis on a film surface using a photomodeler, and measuring and measuring 3D image information data on the film surface. The collection takes place as follows.

(1) First step

In this step, a plurality of code targets 11 are installed at the membrane face of the tunnel. As described above, the code targets 11 have different shapes to be mutually distinguishable and should be installed at least six. This is because a program called photo modeler, which is software embedded in the computer 400, requires at least six reference points for analyzing image information.

(2) second stage

A step of measuring the three-dimensional coordinates of the code target 11 using the total station 300. The total station 300 is used to measure the three-dimensional coordinates (absolute coordinates) of the code target 11 attached to the curtain surface.

(3) Third step

Using the digital camera 200 photographed in synchronization with the point cloud generator 100, image data of the point cloud and the code target 11 generated on the membrane surface of the tunnel in a plurality of directions is photographed. In this case, the tunnel face is photographed at different angles by more than 30 ° from three or more places.

(4) 4th step

In this step, the 3D coordinates of the code target 11 and the captured image data are input to the computer 400. The input three-dimensional coordinates and the image data are stored in the main memory of the computer 400, and the software embedded in the computer 400 can use the same.

(5) 5th step

A 3D image having input image data and 3D absolute coordinates is generated using a photomodeler, which is software embedded in the computer 400.

(6) Sixth Step

After the step of measuring the three-dimensional coordinates of the code target 11 using the total station 300 is completed, the total station 300 is separated from the rod 535 and the laser scanner 700 is mounted to the 3 of the tunnel face. Scan the 3D image.

As described above, the 3D image may be scanned using the laser scanner 700 and compared with the 3D image generated by the photo modeler.

That is, the 3D image may be scanned by the laser scanner 700 and used as a reference for comparison.

FIG. 6 illustrates a screen provided through a monitor of the computer 400 in the process of performing a 3D image processing analysis on the inner plane using a PhotoModeler, and FIG. 7 is installed per station on the inner plane. The light reflection target 22 and a process of generating a 3D image using the same are shown, and the displacement measurement of the inner plane is performed as follows.

(1) First step

A plurality of light reflection targets 22 are installed at predetermined intervals for each station (the longitudinal distance of the tunnel) on the inner surface of the tunnel, and as shown in FIG. 7, three light reflection targets 22 are provided for each station. Left, ceiling. And respectively installed on the right side.

(2) second stage

By using the digital camera 200 to simultaneously record the image data of the light reflection target 22 included in a plurality of stations in a plurality of directions to complete a project.

In this case, one project includes three stations, and three light reflection targets 22 are installed in each station. As a result, a total of nine light reflection targets 22 are included in one project. .

In the photographing using the digital camera 200, as shown in FIG. 7, three photographs are taken for each project, and the photographing directions are different by 30 ° or more.

In addition, the two stations must overlap between successive post-war projects to share six light reflection targets 22 between the post-war projects.

This is because a program called a photo modeler requires at least six reference points for image information processing.

(3) Third step

The total station 300 is used to measure the three-dimensional absolute coordinates of the light reflection target 22 constituting any one station to be a reference.

(4) 4th step

Image data for each project and three-dimensional coordinates of the light reflection targets 22 constituting any one station to be a reference to the computer 400 is stored in the main memory device.

(5) 5th step

The 3D image of the input image data and the 3D absolute coordinates is generated by using a program called PhotoModeler, which is software embedded in the computer 400.

That is, a three-dimensional image having three-dimensional absolute coordinates is generated by continuously connecting the front and rear projects sharing the six light reflection targets 22.

As described above, the technical idea of the present invention has been described with reference to specific embodiments, but the protection scope of the present invention is not necessarily limited to these embodiments, and various known technologies without departing from the technical spirit of the present invention. The addition or deletion of suffixes, substitution of conventional means, simple design changes, and numerical limitations also make it clear that they belong to the protection scope of the present invention.

Technical effects according to the present invention of the above configuration is as follows.

First, regardless of the knowledge and experience of the operator, it is possible to secure the professionalism and reliability of the work by maintaining the consistency of displacement measurement results.

In other words, it is possible to generate and analyze 3D images of the face and air plane using a program called photo modeler using image data of digital camera and 3D absolute coordinates measured by total station. The consistency of displacement measurement results can be maintained, ensuring measurement expertise and reliability.

Second, the risk of safety accidents can be prevented due to poor management of measurement.

In other words, the displacement measurement is performed using a program embedded in the digital camera, the total station, and the computer, thereby ensuring the reliability of the measurement and preventing the risk of a safety accident due to the wrong measurement.

Third, it is possible to minimize the time required for the measurement and analysis of the membrane face and air plane displacement of the tunnel.

In other words, when the photographing of the digital camera 200 and the measurement of the absolute coordinates of the total station 300 are completed, this is input to the computer 400 and a program embedded in the computer 400 may generate a 3D image. As the system is mounted and moved in the vehicle, measurement and analysis time can be dramatically reduced.

Claims (5)

A plurality of cord targets 11 installed on the membrane face of the tunnel; A point cloud generator 100 for generating a point cloud composed of images of light arranged in a lattice form on a tunnel face; A digital camera 200 which is synchronized with the point cloud generator 100 and captures the point cloud of the tunnel face generated by the point cloud generator 100 and the image data of the code target 11; Total station 300 for measuring the three-dimensional absolute coordinates of the code target (11); A computer (400) in which software for generating a three-dimensional image is generated by using the image data photographed by the digital camera (200) and the three-dimensional absolute coordinates of the code target (11) measured by the total station (300); And a mobile vehicle 500 on which the point cloud generator 100, the computer 400, and the total station 300 are installed. As the surface displacement measuring method, Installing a plurality of code targets 11 on a membrane face of the tunnel; Measuring a three-dimensional absolute coordinate of the code target 11 using the total station 300; Capturing the image data of the point cloud and the code target 11 generated on the membrane surface of the tunnel in a plurality of directions using the digital camera 200 photographed in synchronization with the point cloud generator 100; Inputting three-dimensional absolute coordinates of the code target 11 and photographed image data to the computer 400; And, Generating three-dimensional images of input image data and three-dimensional coordinates by using software embedded in the computer 400; Tunnel face displacement measurement method using a mobile tunnel displacement and the face image information measurement system comprising a. In claim 1, Software built into the computer 400 is a PhotoModeler (PhotoModeler), The code target 11 is provided with different shapes so that mutual identification is possible, and is installed more than six, Digital camera 200 is a tunnel face displacement measurement method using a mobile tunnel displacement and a membrane image information measurement system, characterized in that for taking three or more locations in the tunnel at different angles. In claim 2, A cylinder 530 having a rod 535 moving up and down by hydraulic or pneumatic pressure; Included is the total station 300 is installed to be removable on the top of the rod 535, The laser scanner 700 is further included on the top of the rod 535 to be detachably installed. After the step of measuring the three-dimensional absolute coordinates of the code target 11 using the total station 300 is completed, the total station 300 is separated from the rod 535 and the laser scanner 700 is mounted to Scanning a 3D image; Tunnel face displacement measurement method using a mobile tunnel displacement and the face image information measuring system further comprising a. A plurality of light reflection targets 22 installed on the inner surface of the tunnel; A digital camera 200 for photographing image data of the light reflection target 22; A total station 300 for measuring a three-dimensional absolute coordinate of the light reflection target 22; A computer (400) in which software for generating a three-dimensional image is generated using image data photographed by the digital camera (200) and three-dimensional absolute coordinates measured by the total station (300); And a mobile tunnel 500 in which the computer 400 and the total station 300 are installed. Installing a plurality of light reflection targets 22 for each station at predetermined intervals on the inner surface of the tunnel; Completing a project by simultaneously photographing the image data of the light reflection target 22 included in the plurality of stations in a plurality of directions using the digital camera 200; Repeat the process of completing another project by simultaneously recording the image data of the light reflection target 22 included in a plurality of stations in a plurality of directions using a digital camera 200 by moving the station, between post-war projects Allowing some stations to be photographed in duplicate; Measuring the three-dimensional absolute coordinates of the light reflection target 22 constituting any one station to be a reference using the total station 300; Inputting three-dimensional absolute coordinates of the light reflection targets 22 constituting any one station to be the reference data and the image data for each project to the computer 400; And, Generating three-dimensional images of input image data and three-dimensional absolute coordinates using software embedded in the computer 400; Tunnel perforation displacement measurement method using a mobile tunnel displacement and the membrane image information measurement system comprising a. In claim 4, Software built into the computer 400 is a PhotoModeler (PhotoModeler), Install three or more light reflection targets 22 for each station, Include 3 stations for each project, Take 3 photos for each project, but each shooting direction is more than 30 ° A tunnel tunnel displacement measurement method using a mobile tunnel displacement and a closed-surface image information measurement system, characterized in that two stations are overlapped between postwar projects.

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