Sleeve position inspection system and sleeve position inspection method

Abstract

To provide a sleeve position inspection system for inspecting whether a sleeve is installed on a reinforcing steel structure based on a sleeve installation plan.SOLUTION: A sleeve position inspection system is comprised of: sleeve information storage means 1 for storing data including the installation position and attribute information of a sleeve S; a sleeve identification ring 2 attached to the sleeve S; sleeve attribute information display means 3 attached to the surface of the sleeve identification ring 2 and capable of image recognition by photographing with a camera 4; the camera 4 for photographing an installation position of the sleeve S; image display means 5 for displaying an image of the sleeve position by AR generated based on the installation position information of the sleeve and an image taken by the camera 4 in a superimposed manner, thereby specifying the installation position of the sleeve S; and sleeve attribute information comparison means 6 for comparing the sleeve attribute information stored in the sleeve information storage means 1 with the sleeve attribute information acquired from the sleeve attribute information display means 3 photographed by the camera 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a sleeve position inspection system and a sleeve position inspection method, and ensures that sleeves installed in a reinforcing steel structure before concrete placement, such as beams and walls of a reinforced concrete (hereinafter referred to as "RC") building, after the reinforcement of the beams and walls, etc., are installed as planned in design drawings and the like, before concrete placement, efficiently and economically.

Background Art

[0002] In an RC structure building, through holes are provided in beams and walls for passing various pipes used for water supply, gas, air conditioning, etc. and electrical and communication wiring. This type of through hole is mainly formed by attaching a sleeve (cylindrical body) such as a paper void tube to the reinforcing steel structure before concrete placement after the reinforcement of the beams and walls, etc., and then placing concrete after the sleeve is attached.

[0003] Also, after the sleeves are attached and before the concrete is placed, regular inspections are carried out on whether the presence, diameter, position, etc. of each sleeve are appropriate.

[0004] Conventionally, this type of sleeve inspection has been manually performed by on-site workers measuring and recording the diameter, position, use, etc. for each sleeve while referring to the construction drawings after the sleeves are attached to the reinforcing steel structure such as beams and walls and before the concrete is placed.

[0005] Also, for example, Patent Document 1 discloses an invention of a sleeve position inspection device for inspecting whether a sleeve attached to a reinforcing steel structure such as a beam or a wall before concrete placement is attached at an appropriate position before concrete placement.

[0006] Specifically, when the structure composed of reinforcing bars and sleeves before concrete placement is regarded as a reinforcing bar structure, the sleeve position inspection device includes: an AR model storage means for storing the AR model of the reinforcing bar structure; a reference marker installed inside or near the reinforcing bar structure at a position known in the AR model; a sleeve marker installed on the sleeve for measuring the position of the sleeve; a sensing device for sensing the reference marker and at least one sleeve marker in that order and then sensing the reference marker again after sensing these markers; a sleeve marker position analysis means for analyzing the position of the sleeve marker associated with the reference marker from the data sensed by the sensing device; and a sleeve marker position determination means for collating the position of the sleeve marker analyzed by the sleeve marker position analysis means with the AR model stored in the AR model storage means to determine whether the position of the sleeve is correct.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, since the sleeves are attached at hundreds of locations depending on the scale of the building, it takes a lot of time and labor for the on-site workers to inspect all of them. Therefore, it is very difficult to accurately inspect all the sleeves within a limited period, and there is a risk of inspection omission.

[0009] In addition, in the sleeve position inspection device of Patent Document 1, in order to measure the position of each sleeve, a reference marker installed at a known position in the AR model of the reinforcing bar structure composed of a reinforcing bar and a sleeve, a sleeve marker installed on the sleeve to measure the position of the sleeve, and the reference marker and at least one sleeve marker are sensed in that order, and it is necessary to sense the reference marker again after sensing these markers. Therefore, the measurement work is very troublesome, and there is a risk of measurement error, such as misidentifying the object to be sensed and the number of sensing times.

[0010] In addition, since the sleeve marker is attached to an adhesive sheet for opening attached so as to close the opening of the sleeve or an adhesive sheet for side surface attached to the side surface of the sleeve, the work of attaching the adhesive sheet is troublesome, and it is presumed that the adhesive sheet is used only once and discarded after use, which is extremely uneconomical.

[0011] The present invention has been made to solve the above problems, and it is an object of the present invention to provide a sleeve position inspection system and a sleeve position inspection method that can surely, efficiently, and economically inspect whether sleeves attached after the reinforcement arrangement of beams, walls, etc. in a reinforced concrete building are installed as planned in design drawings, etc. before concrete placement.

Means for Solving the Problems

[0012] The present invention is a sleeve position inspection system for confirming that a sleeve is installed at a planned position at a construction site, comprising: a sleeve information storage means for storing data including installation position information and attribute information of the sleeve based on a sleeve installation plan drawing; a sleeve identification ring having a diameter corresponding to the diameter of the sleeve to be inspected and directly or indirectly attached to the end of the sleeve at the construction site; a sleeve attribute information display means added to the surface of the sleeve identification ring and capable of image recognition by camera shooting; a camera for shooting the installation position of the sleeve installed at the construction site; an image (AR model) of the sleeve position by AR (augmented reality) generated based on the installation position information of the sleeve; an image display means for overlapping and displaying the image taken by the camera to identify the installation position of the sleeve installed at the construction site; and a sleeve attribute information collation means for collating the sleeve attribute information stored in the sleeve information storage means and the sleeve attribute information obtained from the sleeve attribute information display means photographed by the camera.

[0013] The sleeve attribute information preferably includes use information, dimension information, specification information, etc. of the sleeve, and preferably includes at least one or more of these information.

[0014] The sleeve attribute information display means preferably includes characters, figures, patterns, colors, markings, QR codes (registered trademark of Denso Wave Incorporated), etc., and preferably includes at least one or more of these display means.

[0015] The image display means and the camera can use a display and a camera provided in a mobile terminal such as a smartphone or a tablet or a terminal connected by a communication line, and preferably include at least one or more of these.

[0016] Furthermore, by providing an AR digital measurer (AR measurer) that measures the dimensions within an image taken by a camera equipped in a mobile terminal such as a smartphone, the position and diameter of the sleeve can be easily measured within the display image.

[0017] In addition, since the sleeve identification ring is provided with a fitting portion that fits onto the outer peripheral surface of the sleeve end portion, it can be detachably and easily attached to the end portion of the sleeve, and can also be used repeatedly.

[0018] Moreover, by providing a ring main body portion having a predetermined width in the radial direction that is exposed on the surface side of the sleeve end face, the sleeve attribute information display means can be easily installed on the surface of the ring main body portion.

[0019] Note that the sleeve main body portion may have a predetermined width in a flange shape in the inner direction and / or the outer direction in the radial direction of the sleeve end portion, and the sleeve attribute information display means may be provided on the surface of the ring main body portion.

[0020] In addition, the material of the sleeve identification ring may be plastic, rubber, metal, paper, or the like. Further, the sleeve identification ring may be formed by a coating material applied to the surface of the sleeve end portion, and the coating material may also serve as the sleeve attribute information display means.

Advantages of the Invention

[0021] According to the present invention, by comparing the image of the sleeve position by AR (AR model) generated based on the installation position information of the sleeve with the image of the installation position of the sleeve installed on the reinforcing structure such as the beam or wall of the RC building at the construction site, it is possible to ensure, efficiently, and extremely economically before the concrete placement that the sleeve installed after the reinforcement arrangement of the reinforcing structure of the RC building such as the beam or wall of the RC building is installed as planned based on the sleeve installation plan drawing.

[0022] In addition, the image of the sleeve position by AR generated based on the installation position information of the sleeve can be easily displayed on the display of a mobile terminal such as a smartphone or a doublet. Also, the image of the installation position of the sleeve installed on the reinforcing structure such as the beam or wall of the RC building at the construction site can be easily photographed by the camera of the doublet terminal. Furthermore, the image of the sleeve position by AR and the image of the installation position of the sleeve installed on the reinforcing structure can be easily collated by superimposing them on the display of the same mobile terminal.

[0023] Furthermore, the sleeve identification ring can be easily attached by fitting it to the end of the sleeve installed on the reinforcing structure before placing concrete, such as the beam or wall of the RC building. Also, since it can be detachably attached, it can be used repeatedly, which is extremely economical.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0025] Figures 1 - 7 illustrate an embodiment of the present invention, which is a sleeve position inspection system for confirming that sleeves installed before concrete placement are installed based on a sleeve installation plan drawing on a steel structure such as a beam or wall of an RC building at a construction site.

[0026] In the figure, the sleeve S is a cylindrical body for forming a through hole through which various pipes used for water supply, gas, air conditioning, etc. and electrical and communication wiring pass through an RC structure such as a beam or wall of an RC building. Usually, it is formed so that it can be installed without special processing from a paper void tube or PVC pipe in a circular or rectangular shape, and is attached to a steel structure Y such as a beam or wall before concrete placement.

[0027] Also, reference numeral 1 is a sleeve information storage means for storing data including the installation position information and attribute information of the sleeve S based on the sleeve installation plan drawing. The sleeve installation plan drawing is created by CAD (T - FAS, repro, etc.) for facility construction drawings for on - site construction, and the sleeve attribute information includes usage information, dimension information, specification information, etc. of the sleeve S.

[0028] Reference numeral 2 is a sleeve identification ring having a diameter corresponding to the diameter of the sleeve S to be inspected, and is directly or indirectly attached to the end of each sleeve S at a construction site.

[0029] The sleeve identification ring 2 is formed in a circular or rectangular ring shape based on the cross - sectional shape of the sleeve S, and includes a fitting portion 2a that fits onto the outer peripheral surface or inner peripheral surface of the end of the sleeve S, and a ring main body portion 2b having a predetermined width in the radial direction that is exposed on the end surface side of the sleeve S.

[0030] The fitting portion 2a is detachably formed by fitting to the outer peripheral surface or the inner peripheral surface of the end portion of the sleeve S, and after being attached, it is formed so as not to easily fall off particularly during concrete placement and after the concrete hardens.

[0031] In addition, the separate ring 2 for sleeve identification is conventionally installed at the end of the sleeve S and is formed so as to be attached also from above an end cover 2c made of an adhesive tape (gum tape) or the like that covers the end of the sleeve S.

[0032] Also, when the cover 2c covering the end of the sleeve S is not required, or when the end cover 2c is transparent, it may be formed so as to be attached using an adhesive material such as a double-sided adhesive tape instead of the fitting portion 2a.

[0033] The sleeve main body portion 2b is formed to have a predetermined width in the inner direction and / or the outer direction in the radial direction of the end of the sleeve S, and sleeve attribute information display means 3 described later is provided on the surface of the ring main body portion 2b (see FIGS. 1 and 4).

[0034] Also, the surface of the ring main body portion 2b has colors and brightness for the purpose of improving the image recognition accuracy by a camera 4 provided in a mobile terminal such as a smartphone or a tablet described later. (The recognition rate improves with higher contrast.)

[0035] Also, the detectable width of the ring main body portion 2b is basically set to be equal to or greater than the width at which image recognition by a camera 4 provided in a mobile terminal such as a tablet described later is possible, and is generally formed to be about 1 to 2 cm.

[0036] Also, the sleeve identification ring 2 is not affected by rainwater, moisture in concrete, etc., and is made of a material that does not adversely affect the contacting body concrete, for example It is formed from plastic, rubber, metal, paper, or the like.

[0037] In addition, when the end cover 2c of the sleeve S is not required, or when the end cover 2c is transparent, etc., a coating material 2d may be applied to the end surface of the sleeve S to form the sleeve identification ring 2 (see FIGS. 5(g) and 5(h)).

[0038] Also, reference numeral 2e is the alignment point of the sleeve identification ring 2, and reference numeral 2f is an IC tag such as an RFID, which can read and write information such as the usage information, dimensional information, and specification information of the sleeve S. And reference numeral 2g is the inspection progress marking.

[0039] Reference numeral 3 is a sleeve attribute information display means attached to the surface of the sleeve identification ring 2, that is, the surface of the ring main body 2b, and can be recognized by image recognition by a camera 4 provided in a mobile terminal such as a smartphone or a tablet described later.

[0040] The sleeve attribute information display means 3 includes characters, figures, patterns, colors, markings, barcodes, or QR codes (registered trademarks), etc., and at least one or more of these display means 3 are attached. And various necessary information such as the position information regarding the sleeve S is displayed on the surface of the ring main body 2b by one or more sleeve attribute information display means 3 such as characters and figures.

[0041] For example, in FIG. 6 and Table 1, the diameter and belonging of the sleeve S are displayed by the arrangement (position) of markings a, b, c, d and the belonging identification color marker 2h (color, etc.). Since it is predicted that the reading accuracy of the diameter dimension of the sleeve S is low only from the image taken by the camera 4 provided in a mobile terminal such as a smartphone, it is provided as an auxiliary information reading method.

[0042] Specifically, markings a, b, c, d for displaying the diameter dimension of the sleeve S are provided at a plurality of locations in the circumferential direction on the surface of the ring main body 2b of the sleeve identification ring 2, and a belonging identification color marker 2h for displaying the belonging of the sleeve S is provided at the lower end portion of the surface of the ring main body 2b.

[0043] For example, the diameter dimension of the sleeve S with a marking a attached to one location of the ring main body 2b is displayed as 300 mm, and the diameter dimension of the sleeve S with markings a and c attached to two locations of the ring main body 2b is displayed as 400 mm. Also, by presetting the color of the belonging identification color marker 2h for each belonging of the sleeve S (such as equipment, electricity, architecture, etc.), the belonging of the sleeve S is indicated by the color of the belonging identification color marker 2h.

[0044]

Table 1

[0045] Reference numeral 4 is a camera that photographs the installation position of the inspection target sleeve S attached to the steel structure Y before concrete placement of beams and walls of an RC building at a construction site, and a camera provided in a mobile terminal such as a smartphone or a tablet is used as the camera 4.

[0046] The mobile terminal such as the smartphone is provided with a measurement AR measure for measuring the dimensions in the image photographed by the camera 4 together with the camera 4, and the position and diameter of the sleeve S can be easily measured in the image of the mobile terminal such as the smartphone using the measurement AR measure.

[0047] Reference numeral 5 is an image display means for identifying the installation position of the sleeve S attached to the steel structure Y before concrete placement of beams and walls of an RC building by superimposing and displaying an image (AR model) of the position of the sleeve S by AR generated based on the installation position information of the sleeve S and an image of the position of the inspection target sleeve S photographed by the camera 4 provided in a mobile terminal such as a smartphone or a tablet, and a display provided in a mobile terminal such as a smartphone or a tablet is used as the image display means 5.

[0048] Reference numeral 6 is a sleeve attribute information collating means for collating the attribute information of the sleeve S stored in the sleeve information storage means 1 with the sleeve attribute information read from the sleeve attribute information display means 3 by photographing with the camera 4. When the attribute information of the sleeve S matches the sleeve attribute information read from the sleeve attribute information display means 3, it is possible to confirm that the sleeve S attached before the placement of concrete is installed on the reinforcing structure Y such as the beam or wall of the RC building based on the sleeve installation plan.

[0049] In such a configuration, next, the operation procedure of the sleeve position inspection method of the present invention will be described (see the flowchart of FIG. 9). (1) First, the installation position, attribute information (usage information, dimension information, specification information, etc.) of each sleeve S are written out in the IFC common format from the sleeve installation plan (hereinafter referred to as "sleeve plan") for on-site construction created by CAD for facility construction drawings (T-FAS, repro, etc.) (sleeves for facilities, electricity, architecture, etc.). (2) Next, each sleeve S is numbered, and a database including dimensions, specifications, affiliations, position information, etc. for each sleeve S is created and linked to the sleeve S on the drawing data of the sleeve installation plan. (3) Next, as a preparation before starting the inspection at the construction site, the reference point of the reinforcing structure Y such as the beam or wall of the RC building at the construction site before the placement of concrete is aligned with the reference point on the image (AR model) of the sleeve installation position of the reinforcing structure Y by AR generated based on the installation position information of the sleeve S. Note that the center line of the beam, wall, etc. before the placement of concrete can be used as the reference point.

[0050] Thereby, the AR model of the reinforcing structure Y such as the beam or wall before the placement of concrete can be aligned with the reinforcing structure Y such as the beam or wall of the RC building at the construction site before the placement of concrete.

[0051] In addition, a projection surface for the AR digital measurer and a projection surface / scale alignment marker (see FIG. 7) for aligning the reference dimensions are installed at a predetermined position of the reinforcing structure Y such as the beam or wall. (4) Next, the AR model of the reinforced structure Y such as beams and walls is AR projected onto the display provided by a mobile terminal such as a smartphone, and the position of the sleeve S to be inspected is displayed. (5) Next, the inspection range of the reinforced structure Y such as the beam or wall where the sleeve S to be inspected is installed is photographed by the camera 4 provided by a mobile terminal such as a tablet. (6) Next, according to the image recognition technology provided by the sleeve attribute information matching means 6, the shape, etc. of the inspection target sleeve S where the sleeve identification ring 2 is installed are extracted and recognized from the image photographed by the camera 4 provided by a mobile terminal such as a smartphone or a tablet, and compared with the AR model of the reinforced structure Y to confirm the presence, position, and consistency of the attribute information (such as use) of the sleeve S.

[0052] Also, measure the installation position, etc. of the inspection target sleeve S. The contents to be measured are the diameter of the inspection target sleeve S, the installation position (height and horizontal from the reference point), material, belonging (such as use), and the presence or absence of reinforcing bars for reinforcing the periphery of the sleeve S.

[0053] Also, for the measurement of the installation position of the sleeve S, switch to the measurement mode on the AR model of the reinforced structure Y such as the columns and beams of the RC building, and measure with the AR digital measurer according to the actual inspection target sleeve S. The measured dimensions are recorded as measurement data in the sleeve information storage means 1.

[0054] Specifically, project the AR digital measurer onto the screen of a tablet terminal such as a smartphone, and measure the position and diameter of the inspection target sleeve S on the screen of the tablet terminal with the AR digital measurer.

[0055] In addition, in order to accurately perform the measurement with the AR digital measurer, for example, a projection surface / scale alignment marker 7 as shown in FIG. 7 is installed within the measurement range of the reinforced structure Y. The projection surface / scale alignment marker 7 is composed of three marker bodies 8, 8 arranged at regular intervals at three locations in the same vertical plane and a plurality of frames 9 arranged between the marker bodies 8, 8 to hold each marker body 8, 8.

[0056] Then, on the screen of the mobile terminal, the surface formed by the marker bodies 8, 8 and the surface for projecting the AR digital measurer are specified from the distance L between the marker bodies 8, 8, and the scale is measured in accordance with the actual situation.

[0057] During measurement, the AR digital measurer and the electronic blackboard are simultaneously photographed as evidence photos and recorded as data in the sleeve information storage means 1.

[0058] After the inspection is completed, an inspection progress marking 2g is attached to the sleeve identification ring 2 so that the progress status of the sleeve inspection can be confirmed. In addition, necessary inspection records are written out as inspection record forms and reported to the relevant personnel online.

Industrial Applicability

[0059] The present invention can reliably, efficiently, and economically inspect before concrete placement whether the sleeves installed after steel bar reinforcement in the steel bar structure such as beams and walls of RC buildings are installed as planned in design drawings and the like before concrete placement.

Explanation of Signs

[0060] S Sleeve, Y Steel bar structure of RC building, a, b, c, d Marking 1 Sleeve information storage means, 2 Sleeve identification ring, 2a Fitting part, 2b Ring main body part, 2c End cover, 2d Coating material, 2e Alignment point, 2f Alignment point, 2g Inspection progress marking, 2h Affiliation identification color marker, 3 Sleeve attribute information display means 4 Camera equipped with a mobile terminal or the like, 5 Image display means, 6 Sleeve attribute information verification means, 7 Projection surface and scale alignment marker, 8 Marker body, 9 Frame

Claims

1. A sleeve position inspection system for confirming that a sleeve is installed at a planned position at a construction site, comprising: a sleeve information storage means for storing data including installation position information and attribute information of the sleeve based on a sleeve installation plan drawing; a sleeve identification ring having a diameter corresponding to the diameter of the sleeve to be inspected and attached directly or indirectly to the end of the sleeve at the construction site; a sleeve attribute information display means added to the surface of the sleeve identification ring and recognizable by image recognition by a camera; a camera for photographing the installation position of the sleeve installed at the construction site; an image of the sleeve position by AR generated based on the installation position information of the sleeve, and an image photographed by the camera are superimposed and displayed with a reference point such as a core of a beam or a wall before concrete placement as a reference point, and an image display means for specifying the installation position of the sleeve installed at the construction site; a sleeve attribute information collation means for collating the sleeve attribute information stored in the sleeve information storage means with the sleeve attribute information obtained from the sleeve attribute information display means photographed by the camera; A sleeve position inspection system, characterized by comprising the above.

2. The sleeve position inspection system according to Claim 1, wherein the sleeve attribute information includes at least one or more of use information, dimension information, and usage information.

3. The sleeve position inspection system according to Claim 1, wherein the sleeve attribute information display means includes at least one or more of characters, figures, patterns, colors, barcodes, and QR codes (registered trademarks).

4. The sleeve position inspection system according to Claim 1, wherein the image display means includes at least one or more of a mobile terminal or a display of a terminal connected by a communication line.

5. The sleeve position inspection system according to Claim 1, further comprising an AR measurer for measuring dimensions in an image photographed by the camera.

6. In the sleeve position inspection system according to claim 1, the sleeve identification ring includes a fitting portion that fits onto the outer peripheral surface of the sleeve end portion, and a ring main body portion having a predetermined width in the radial direction that is exposed on the surface side of the sleeve end face, and the sleeve attribute information display means is provided on the surface of the ring main body portion. A sleeve position inspection system characterized by this.

7. In the sleeve position inspection system according to claim 1, the sleeve identification ring is made of plastic, rubber, metal, or paper. A sleeve position inspection system characterized by this.

8. In the sleeve position inspection system according to claim 1, the sleeve identification ring is formed by a coating material applied to the surface of the sleeve end portion, and the coating material also serves as the sleeve attribute information display means. A sleeve position inspection system characterized by this.

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