Construction management method and construction management device

Abstract

To provide a construction management method configured to easily identify whether a management object has been installed as specified in a construction drawing.SOLUTION: A construction management method includes: a first imaging step (step S101) of forming a first image including a line generation position corresponding to a scheduled installation position of a management object and a first reference scale having a predetermined length, before installing the management object in an equipment work site based on a construction drawing; a second imaging step (step S102) of forming a second image including the installed management object and a second reference scale having a predetermined length, after installing the management object; and a display step (step S103) of displaying the scheduled installation position of the management object indicated in the construction drawing, the line generation position included in the first image, and the installation position of the management object included in the second image, on a display device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a construction management method and a construction management device. [Background technology]

[0002] Patent document 1 describes "a construction management system that manages the construction of a construction object, comprising: a specification data storage unit that stores specification data related to the specifications of the construction object; a construction data storage unit that stores construction data related to the status of the construction in real space; a data generation unit that generates progress data representing the progress status of the construction based on the specification data and the construction data; and a data output unit that outputs the progress data." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-140257 A (Claim 1) Summary of the Invention [Problem to be solved by the invention]

[0004] At facility construction sites, it is necessary to manage whether the facility has been installed according to the construction drawings. A sleeve, which is an example of a facility, is installed in the framework of a building, such as concrete or steel frame, to pass pipes, ducts, cables, etc. The sleeve on the floor is a through hole through which pipes, etc. between upper and lower floors of the building pass, and if the position of this sleeve is misaligned, it has a significant impact on the structural strength of the building and the facility construction process. It is also preferable to easily manage the installation of facilities that require management, not limited to sleeves, that is, objects to be managed.

[0005] In the technology described in Patent Document 1, construction inspection result data is generated based on the real space data of the building obtained by a 3D laser scanner and the construction inspection data, to display the areas where defects were found in the construction inspection in an overlapping manner (paragraph 0079). However, the technology described in Patent Document 1 does not state that it is possible to judge whether or not the managed objects such as sleeves are installed according to the construction drawings based on the information obtained by imaging the actual facility construction site.

[0006] The present disclosure provides a construction management method and a construction management device that can easily determine whether or not an object to be managed has been installed according to construction drawings. [Means for solving the problem]

[0007] The construction management method of the present disclosure is characterized by including a first imaging step of imaging a first image including a marking position corresponding to a planned installation position of the managed object and a first standard scale having a predetermined length before installation of the managed object at a facility construction site, a second imaging step of imaging a second image including the installed managed object and a second standard scale having a predetermined length after installation of the managed object, and a display step of displaying on a display device the planned installation position of the managed object shown in a construction drawing, the marking position included in the first image, and the installation position of the managed object included in the second image. Other solutions will be described later in the description of the embodiment of the invention. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a construction management method and a construction management device that can easily determine whether or not the installation of a managed object has been carried out according to the construction drawings. [Brief description of the drawings]

[0009] [Figure 1] 1 is a flowchart outlining a construction management method. [Diagram 2] FIG. 11 is a diagram for explaining the first imaging step and a diagram for explaining a method of marking the marking positions. [Diagram 3]FIG. 13 is a diagram for explaining the first imaging step, and is a diagram for explaining a method of arranging a simulation plate at a marking position. [Figure 4A] 1 is an example of a landmark having identification information. [Figure 4B] 1 is an example of a landmark having identification information. [Figure 4C] 1 is an example of a landmark having identification information. [Figure 4D] 1 is an example of a landmark having identification information. [Figure 4E] 1 is an example of a landmark having identification information. [Figure 4F] 1 is an example of a landmark having identification information. [Figure 4G] 1 is an example of a landmark having identification information. [Figure 4H] 1 is an example of a landmark having identification information. [Diagram 5] 13 is a diagram showing the state of the deck surface after the first imaging process. FIG. [Figure 6] FIG. 11 is a diagram illustrating a second imaging step. [Figure 7] 13 is a diagram illustrating a case where the second imaging process is performed at an imaging height position different from the imaging height in the first imaging process. FIG. [Figure 8] FIG. 11 is a diagram illustrating an image displayed in a display process. [Figure 9] 13 is an example of an image showing the shape and dimensions of a sleeve extracted from the second image. [Figure 10] FIG. 2 is a functional block diagram of the construction management device system. [Figure 11] 1 is a flowchart illustrating a construction management method. [Figure 12] 12 is a flowchart illustrating the construction management method, which follows FIG. 11 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a form for carrying out the present disclosure (referred to as an embodiment) will be described with reference to the drawings. In the following description of one embodiment, other embodiments applicable to the one embodiment will also be described as appropriate. The present disclosure is not limited to the following one embodiment, and different embodiments can be combined with each other or modified as desired without significantly impairing the effects of the present disclosure. In addition, the same symbols will be used for the same members, and duplicate descriptions will be omitted. Furthermore, members having the same functions will be given the same names. The contents shown are merely schematic, and for convenience of illustration, changes may be made from the actual configuration within a range that does not significantly impair the effects of the present disclosure, and some members may be omitted or modified between drawings.

[0011] Fig. 1 is a flow chart for explaining an outline of the construction management method. The construction management method of the present disclosure includes step S101, which is a first imaging step, step S102, which is a second imaging step, and step S103, which is a display step. First, the construction management method will be explained mainly with reference to Figs. 1 to 9, and then the part of the construction management method that uses the construction management device 100 (Fig. 10) will be explained together with the configuration of the construction management device 100 mainly with reference to Figs. 10 to 12.

[0012] Step S101 is a process of capturing a first image including a marking position 11 corresponding to a planned installation position of the sleeve 10 (FIG. 6) and first reference scales 41, 42 (FIG. 3) having a predetermined length before the sleeve 10 is installed at the facility construction site S. The marking position 11 is marked based on a construction drawing (e.g., a CAD drawing, a PDF drawing, etc.). In this specification, the sleeve 10 is exemplified as an object to be managed, but the object to be managed is not limited to a sleeve.

[0013] FIG. 2 is a diagram for explaining step S101, and is a diagram for explaining a method of marking the marking position 11. When the sleeve 10 is installed at an equipment construction site S such as a framework construction site, marking is performed on the installation location, such as the deck surface 60 (FIG. 7). In the illustrated example, a plurality of sleeves 10 are installed to form a sleeve group 15 (FIG. 6). Marking is performed by using an appropriate surveying instrument such as a total station to mark the location corresponding to the installation location shown in the construction drawing. The marking position 11 is to be marked at a position a predetermined distance away from the beam 22 extending in the X-axis direction and the beam 23 extending in the Y-axis direction, for example. The beams 22 and 23 have reference lines 24 and 25 that are the center lines of the beams 22 and 23, respectively. The marking position 11 is performed, for example, by arranging two lines so that they are perpendicular to each other. When the sleeve 10 is, for example, a circular pipe, the marking position 11 is determined so that the intersection of the two lines overlaps with the axial center of the circular pipe.

[0014] In the illustrated example, reference lines 12 and 13 are drawn near a position included in the first image, for example, reference lines 24 and 25, so as to pass through marked position 11, which is the planned installation position of sleeve 10. Reference lines 12 and 13 are drawn, for example, using pen 21, so as to be parallel to reference lines 24 and 25, respectively. By drawing them parallel, the marked position 11 from reference lines 24 and 25 can be grasped in the first image.

[0015] FIG. 3 is a diagram for explaining step S101, and is a diagram for explaining a method of arranging the simulation plate 31 at the marking position 11. In step S101, the facility construction site S is imaged in a state in which a mark 30 for recognizing the marking position 11 in the first image is attached to the marking position 11. For this reason, the marking position 11 formed on the deck surface 60 (FIG. 7) is attached with the mark 30 for recognizing the marking position 11 in the first image. This allows the marking position 11 to be recognized in the first image using the mark 30 as a clue. In the illustrated example, the mark 30 is a mark that imitates the shape and dimensions of the sleeve 10 (FIG. 6) in a top view, and is arranged, for example, on the surface of a rectangular simulation plate 31 made of transparent resin. By using such a mark 30, it is possible to easily grasp the shape and dimensions of the sleeve 10 in the first image.

[0016] For example, when the sleeve 10 is a circular tube, the mark 30 can be configured by a ring drawn to have the same outer diameter as the circular tube. In this case, the mark 30 is arranged so that the center of the mark 30 and the intersection of the marking position 11 coincide with each other.

[0017] The mark 30 is preferably displayed in a color that is recognizable in the first image. Specifically, the mark 30 is preferably a color that is significantly different from the color of the facility construction site S, such as the deck surface 60 (FIG. 7). For example, the mark 30 may be displayed on the simulation plate 31 as described above, but may also be directly attached to the marking position 11 on the deck surface. The mark 30 can be placed by any method, such as a sticker, printing, or painting.

[0018] It is preferable that the mark 30 further has identification information of the marking position 11 at which the mark 30 is attached. In this way, the marking position 11 at which the mark 30 is attached can be identified in the first image. In particular, when there are multiple marking positions 11, information such as the location of the marking position 11 and the dimensions or shape of the sleeve 10 to be placed can be identified.

[0019] 4A to 4H are examples of the mark 30 having identification information. The mark 30 shown in Fig. 4A to 4H all have the above-mentioned circular ring that imitates the shape of the sleeve 10 in a top view as a basic skeleton.

[0020] The mark 30 shown in FIG. 4A has a shape in which a line segment extending in the diametric direction of the ring is arranged inside the ring. The mark 30 shown in FIG. 4B has a shape in which one square mark is arranged at the center of the ring. The mark 30 shown in FIG. 4C is not a complete ring, but has a shape in which a part of the ring is cut. The mark 30 shown in FIG. 4D is not a complete ring, but has a shape in which the ring is cut at four equal intervals in the circumferential direction. The mark 30 shown in FIG. 4E has a shape in which two line segments, a first line segment extending in the diametric direction of the ring and a second line segment perpendicular to the first line segment, are arranged inside the ring. The mark 30 shown in FIG. 4F has a shape in which two square marks are arranged diagonally at the center of the ring so that one corner of each square touches each other. The mark 30 shown in FIG. 4G is not a complete ring, but has a shape in which the ring is cut at two equal intervals in the circumferential direction. The mark 30 shown in FIG. 4H has a shape in which a square mark is arranged at the center of a circular ring in addition to the shape of the mark 30 shown in FIG. 4D.

[0021] In this way, the mark 30 can be given identification information by deforming the ring within a range that does not impair the shape and dimensions of the sleeve 10 in a top view. Although not shown, the mark 30 having identification information may be a two-dimensional barcode such as a QR code (registered trademark). By storing, for example, the shape and dimensions of the sleeve 10 together with the identification information in the two-dimensional barcode, it is possible to identify the sleeve 10 and grasp its shape and dimensions. The mark 30 having identification information may have characters indicating the identification information, for example, inside the ring. However, in the mark 30, if a display method is performed such that, for example, the marking position 11 and the center position of the mark 30 are aligned in a specific manner, it is not necessarily necessary to display the outer shape of a ring or the like. In addition, the mark 30 may be any other format such as a one-dimensional barcode, a symbol, or the like, as long as it is a format that can be given identification information.

[0022] Returning to FIG. 3, when imaging in step S101, the first reference scales 41, 42 are arranged in the same direction as the predetermined reference lines 24, 25 (center line) and in a direction passing through a predetermined position of the marking position 11, for example an intersection. The first reference scales 41, 42 have a predetermined length and serve as a reference for the distance per pixel on the first image. In the example shown, they are arranged so that the center lines of the first reference scales 41, 42 overlap without deviation with reference lines 12, 13 (return center) which are in the same direction as the reference lines 24, 25 and pass through a predetermined position of the marking position 11, the intersection. By arranging them in this position, the distance from the reference lines 24, 25 (center line) to the marking position 11 can be grasped based on the first reference scales 41, 42.

[0023] The reference lines 12, 13 may be lines that are actually drawn at the facility construction site S, or they may be virtual lines that are not actually drawn. However, by actually drawing the reference lines 12, 13, it is possible to easily place the second reference scales 55, 56 based on the positions of the reference lines 12, 13. In the case of virtual lines that are not actually drawn, for example, the first reference scales 41, 42 can be placed on the virtual reference lines 12, 13 by placing the first reference scales 41, 42, for example, parallel (parallel by eye is sufficient) to the specified reference lines 24, 25 (center lines) at the marking position 11.

[0024] In step S101, the facility construction site S can be imaged so as to include the marking position 11 and the first scales 41 and 42, for example, at an angle of view shown in Fig. 3. It is preferable that the imaging is performed by acquiring two or more first images at a plurality of angles of view. The imaging may be performed using a monocular camera or a stereo camera.

[0025] FIG. 5 is a diagram showing the deck surface 60 (FIG. 7) after step S101. However, for convenience of illustration, only the mark 30 is shown instead of the simulation plate 31 with the mark 30. Although details will be described later, the first image obtained by imaging is transmitted to the construction management device 100 (FIG. 10), and the presence or absence of deviation between the marking position 11 and the mark 30 is confirmed by image processing. Meanwhile, at the facility construction site S, the state of the deck surface 60 (FIG. 7) shown in FIG. 5 is obtained by removing the first standard scales 41 and 42 used. Of these, the standard lines 12 and 13 become markers indicating the placement locations of the second standard scales 53, 54, 55, and 56 (FIG. 6) to be relocated in step S102 performed after the installation of the sleeve 10.

[0026] 6 is a diagram for explaining step S102 (FIG. 1). Step S102 is a process of removing the simulation plate 31, installing the sleeve 10 at the marking position 11 (FIG. 2), and then capturing a second image including the installed sleeve 10 and second reference scales 53, 54, 55, and 56 having predetermined lengths.

[0027] The second scales 53, 54, 55, 56 have the same function as the first scales 41, 42 (Fig. 3) except for their different names. The second scales 53, 54, 55, 56 are arranged in the same direction as the predetermined reference lines 24, 25 which are the center lines, and in a direction passing through the center of the sleeve 10 in a top view which is a predetermined position of the sleeve 10. This makes it possible to measure the distance from the reference lines 24, 25 to the second scales 53, 54, 55, 56 in the second image, and to grasp the distance from the reference lines 24, 25 to the sleeve 10.

[0028] In the illustrated example, the second scale reference 53, 54 are positioned so as to overlap with the reference lines 12, 13, respectively, which are used to align the second scale reference 53, 54. In the illustrated example, the reference lines 12, 13 overlap with the centre of the sleeve 10. Therefore, by positioning the second scale reference 53, 54 directly beside the centre of the sleeve 10, the second scale reference 53, 54 can be easily positioned so as to overlap with the reference lines 12, 13.

[0029] The second scales 55 and 56 are arranged parallel to the reference lines 12 and 13 (may be parallel by eye) and are arranged in a position that is entirely included in the imaging ranges 51 and 52 of the camera 50. Imaging is performed with at least two of the second scales 53 and 54 included in the angle of view. In other words, the effect of the present disclosure is achieved as long as at least two of the second scales 53 and 54 are included in the imaging angle of view. However, in order to improve the recognition accuracy, it is preferable to have a large number of the second scales 53 to 56, and it is preferable to use four of the second scales 53, 54, 55 and 56 for imaging as shown in the figure. By using the second scales 55 and 56 in addition to the second scales 53 and 43, at least two of the second scales 53, 54, 55 and 56 can be recognized, for example, when recognition is not possible due to the influence of light or when the second scales 53 and 54 cannot be recognized within the imaging angle of view due to the influence of materials (shadows, etc.). By capturing images of the imaging ranges 51 and 52, two second images are obtained.

[0030] Step S102 can be basically the same as step S101. In step S102, an image of the facility construction site S is taken with a mark 30 (FIG. 3; not shown in FIG. 6) attached to the installed sleeve 10 for recognizing the sleeve 10 in the second image. This makes it easy to recognize the position of the mark 30 and recognize the installation position of the sleeve 10. The mark 30 can be placed on the top surface of the sleeve 10, for example.

[0031] The mark 30 is a mark that imitates the shape and dimensions of the sleeve 10 when viewed from above, similar to the contents described in step S101. This makes it easier to recognize the shape and dimensions of the sleeve 10 in the second image. Furthermore, similar to the contents described in step S101, the mark 30 further has identification information of the sleeve 10 to which the mark 30 is attached. This makes it possible to identify the sleeve 10 to which the mark 30 is attached.

[0032] FIG. 7 is a diagram for explaining a case where step S102 is performed at an imaging height position different from the imaging height in step S101. As described above, since step S101 is performed, for example, on the deck surface 60, it is preferable that step S102 is also performed on the deck surface 60 like step S101. However, for convenience of the on-site process, for example, slab reinforcement (not shown) may be installed above the deck surface 60, and step S102 may be performed on the slab reinforcement. In this case, the second reference scales 53, 54, 55, and 56 may be arranged at an incline due to the slab reinforcement, and step S102 may not be performed appropriately. Therefore, steps S101 and S102 can be performed by the method shown in FIG. 7.

[0033] 7, the second scales 53, 54, 55, 56 are placed at a predetermined height relative to the deck surface 60, which is the floor surface in step S101. Each of the second scales 53, 54, 55, 56 is placed on one mounting table 63. In the example shown, the second scales 53, 54, 55, 56 are placed on the mounting table 63 at a height H0 from the deck surface 60. This makes it possible to prevent problems caused by the second scales 53, 54, 55, 56 being placed at an angle due to the slab reinforcement of the reinforcing bar surface 61.

[0034] In this state, step S101 is performed on the deck surface 60, and step S102 is performed on the reinforcing bar surface 61. This allows the second standard scales 53, 54, 55, 56 to be placed without being affected by the deck surface 60. A mounting base 63 of height H0 and a sleeve 10 of height Hs are placed on the deck surface 60. The mounting base 63 can be attached and detached from the deck surface 60. The reinforcing bar surface 61 that constitutes the slab reinforcement is placed at a position lower than height H0 based on the deck surface 60, and the sleeve 10 penetrates the reinforcing bar surface 61.

[0035] The height from the deck surface 60 to the upper end surface of the sleeve 10 (height dimension of the sleeve 10) can be calculated based on the height H0, which is the height position of the second scales 53, 54, 55, 56 from the deck surface 60 (floor surface at step S101) as a reference, the height position of the deck surface 60 at step S101, and the height position of the reinforcing bar surface 61 at step S102. For example, when the height H0 is 250 mm, the height from the deck surface 60 to the second scales 53, 54, 55, 56 is 250 mm. The height ΔZs from the top surface of the second scales 53, 54, 55, 56 placed on the mounting table 63 to the top surface of the sleeve 10 can be calculated by the following formula (1). The second scales 53, 54, 55, 56 have the same thickness d (for example, 5 mm). Hs=ΔZs+H0+d=ΔZs+250mm+5mm…Formula (1)

[0036] Therefore, by adding the height H0 (e.g., 250 mm) and the thickness d (e.g., 5 mm) to the height ΔZs calculated based on the second image, the height of the sleeve 10 can be calculated with reference to the deck surface 60. In this way, even if the height positions of the floor surface in the first imaging process and the floor surface in the second imaging process differ, the height of the sleeve 10 can be calculated.

[0037] FIG. 8 is a diagram for explaining the image displayed in step S103 (FIG. 1). Step S103 is a process for displaying on the display device 120 (FIG. 10) the planned installation position 70 of the sleeve 10 shown in the construction drawing such as CAD data, the marking position 11 included in the first image obtained in step S101, and the installation position 32 of the sleeve 10 included in the second image obtained in step S102. Step S103 makes it easier to compare the positions and to grasp any deviations. These are displayed, for example, superimposed on the display device 120. This makes it easier to compare the positions on the superimposed images and to grasp any deviations.

[0038] The marking position 11 is determined, for example, with reference to a mark 30 (FIG. 3) attached to a simulation plate 31 (FIG. 3). The installation position 32 is determined, for example, with reference to a mark 30 (for example, FIGS. 4A to 4H) attached, for example, to the upper surface of the installed sleeve 10. The display device 120 displays a construction drawing, a first image, and a second image. However, in this embodiment, as an example of the first image and the second image, a first ortho-image and a second ortho-image (both described later), which are the first image and the second image obtained by ortho-conversion, are displayed. In addition to the construction drawing, the first image, and the second image, the shape (outer diameter) and dimensions (actual dimensions) of the sleeve 10 are also displayed.

[0039] Fig. 9 is an example of an image showing the shape and dimensions of the sleeve 10 extracted from the second image. For convenience of explanation, Fig. 9 shows a different position from those shown in Figs. 1 to 8.

[0040] For example, the outer diameter of the sleeve 10 shown in the upper left of the drawing is rectangular and has dimensions of horizontal L1 and vertical L2. The outer diameter of the sleeve 10 shown in the upper right of the drawing is also rectangular and has dimensions of horizontal L4 and vertical L5. The distance from corner P1 of the upper left sleeve 10 to corner P2 of the upper right sleeve 10 is L3. In addition, circular sleeves 10 having centers P3, P4, and P5 are arranged below the rectangular sleeve 10 on the drawing. Furthermore, circular sleeves 10 having centers P6, P7, and P8 are arranged below the circular sleeves 10 having centers P3, P4, and P5 on the drawing. Although not shown, the actual outer dimensions (diameter) of each of these six circular sleeves 10 are shown near each sleeve 10.

[0041] The distance from each sleeve 10 to the reference lines 24 and 25 is also shown. For example, the distances between each sleeve 10 having centers P4 and P5 and points P10 and P11 on the reference line 25, and the distances between each sleeve 10 having centers P6, P7, and P8 and point P9 on the reference line 24 are displayed.

[0042] As explained with reference to Fig. 7 above, when step S102 is performed at an imaging height position different from the imaging height in step S101, the following content is further displayed in step S103. That is, in step S103, the height dimension of the sleeve 10 is calculated by the method explained with reference to Fig. 7, and the height dimension based on, for example, the deck surface 60 (Fig. 7) is displayed. This makes it possible to accurately grasp the height dimension of the sleeve 10 even if the height position of the floor surface changes.

[0043] 10 is a functional block diagram of a construction management system 1000. The construction management system 1000 includes a camera 50 and a construction management device 100. The camera 50 includes an imaging unit 57, a storage unit 58 (e.g., a removable storage medium such as an SD card), and a communication unit 59 (e.g., a WiFi communication device, a USB (Universal Serial Bus) terminal, etc.). A first image and a second image obtained by imaging with the imaging unit 57 are transmitted to the construction management device 100 via the storage unit 58 and the communication unit 59.

[0044] The construction management device 100 includes a communication unit 101, an image input unit 102, an input unit 103, a recording unit 104, a printing unit 105, a control unit 110, and a display device 120. The communication unit 101 communicates with the communication unit 59, and can be configured, for example, by a WiFi communication device, a USB terminal (both not shown), or the like. The image input unit 102 receives the first and second images from the storage unit 58, and can be configured, for example, by a slot (not shown) to which the above-mentioned storage medium can be attached. The input unit 103 accepts input from the outside, and can be configured, for example, by a keyboard, a mouse (both not shown), or the like. The recording unit 104 records the processing results of the control unit 110. The printing unit 105 prints the processing results of the control unit 110 (for example, a document, etc.). The display device 120 includes a display unit 121 and a touch panel 122.

[0045] In the construction management system 1000, for example, the first image and the second image are normally acquired from the camera 50 via a WiFi communication device (an example of the communication units 59, 101). On the other hand, for example, when the WiFi environment is poor, the first image and the second image may be acquired using a USB terminal (an example of the communication units 59, 101), or the first image and the second image in a storage medium removed from the storage unit 58 may be acquired via the image input unit 102.

[0046] The control unit 110 includes a recognition unit 111 , a judgment unit 112 , a calculation unit 113 , a conversion unit 114 , an image generation unit 115 , a display control unit 116 , an external program control unit 117 , and a form generation unit 118 .

[0047] The recognition unit 111 recognizes the marking position 11, the installation position of the sleeve 10, the first scales 41, 42 (Fig. 3), and the second scales 53, 54, 55, 56 (Fig. 6) in each of the first and second images. The first image is an image captured before the installation of the sleeve 10 (Fig. 6) at the facility construction site S (Fig. 6) according to the construction drawing, and is an image including the marking position 11 (Fig. 3) corresponding to the planned installation position 70 (Fig. 8) of the sleeve 10 and the first scales 41, 42 having a predetermined length. The second image is an image captured after the sleeve 10 is installed, and is an image including the installed sleeve 10 and the second scales 53, 54, 55, 56 having a predetermined length.

[0048] The recognition unit 111 can recognize the marking position 11 and the sleeve 10, for example, using the marks 30 attached to each of them. For example, if the first scale standards 41, 42 and the second scale standards 53, 54, 55, 56 have marks (not shown) similar to the marking 30 attached thereto, the recognition unit 111 can easily recognize them. If the marking 30 has the above-mentioned identification information, the recognition unit 111 can also identify the standard types, shapes, dimensions, etc. of the marking position 11, the sleeve 10, the first scale standards 41, 42, and the second scale standards 53, 54, 55, 56.

[0049] The recognition unit 111 recognizes the sleeve 10 by, for example, comparing an index value, which is at least one of luminance, hue, saturation, and brightness, for each pixel of the second image with a first threshold value, which is the index value at which the managed object can be recognized. The first threshold value can be, for example, a value that is exceeded by pixels including the mark 30 attached to the sleeve 10, etc., but is not exceeded by other pixels, such as pixels including the rebar surface 61.

[0050] The recognition unit 111 determines at least the shape of the sleeve 10 in the second image (e.g., the second orthoimage). Even if the mark 30 includes identification information, these are determined based on the shape and dimensions of the captured sleeve 10, not on the standard shape and dimensions based on the identification information. This allows the document generation unit 118, the details of which will be described later, to generate a drawing.

[0051] The recognition unit 111 recognizes the marking position 11 (FIG. 8), the installation position 32 of the sleeve 10 (FIG. 8), the first scales 41 and 42 (FIG. 8), and the second scales 53, 54, 55, and 56 (FIG. 6) based on the first ortho-image and the second ortho-image. The first ortho-image and the second ortho-image are the first image and the second image that have been ortho-converted as described above, and are an example of the first image and the second image. The ortho-conversion is performed by the conversion unit 114, which will be described later. This makes it possible to easily grasp the marking position 11 and the installation position and shape of the sleeve 10 based on the first scales 41 and 42 and the second scales 53, 54, 55, and 56 in the first ortho-image and the second ortho-image, respectively.

[0052] The judgment unit 112 judges whether or not the actually installed sleeve 10, first scale measure 41, 42, and second scale measure 53, 54, 55, 56 have been correctly recognized by the recognition unit 111. By providing the judgment unit 112, it is possible to suppress erroneous detection of the sleeve 10, first scale measure 41, 42, and second scale measure 53, 54, 55, 56, and to improve processing accuracy. The judgment can be made, for example, by displaying a confirmation screen for the administrator on the display device 120.

[0053] When the determination unit 112 cannot recognize the marking position 11 in the first image or the sleeve 10 in the second image, the determination unit 112 displays a reception screen on the display device 120 to the user to accept a re-recognition operation of the marking position in the first image or the sleeve 10 in the second image. When a blank area or the like occurs in the first image and the second image due to light reflection or the like during imaging, the marking position 11 or the sleeve 10 may not be recognized. In this case, the determination unit 112 displays a reception screen on the display device 120 to the user to accept a re-recognition operation of the marking position 11 or the sleeve 10. This allows the marking position 11 or the sleeve 10 to be re-recognized, and subsequent processing can be performed. When the user operates the reception screen, the recognition unit 111 performs the recognition processing of the marking position 11 or the sleeve 10 again.

[0054] As a specific method of re-recognition, the judgment unit 112 changes the first threshold value for each pixel, which is predetermined for recognizing the sleeve 10, to a second threshold value that allows the sleeve 10 to be recognized. This makes it possible to recognize the sleeve 10 that could not be recognized by comparison with the first threshold value before the change. The second threshold value is, for example, an index value that allows the sleeve 10 to be recognized with looser criteria than the comparison with the first threshold value, and is, for example, a value smaller than the first threshold value. Note that, as a specific method of re-recognition, for example, data interpolation of missing parts may be used.

[0055] The calculation unit 113 is adapted to calculate the parameters used for the ortho-conversion of the first and second images and also to determine the dimensions of the sleeve 10 in the second image.

[0056] The conversion unit 114 performs ortho-conversion of the first image and the second image. The specific method of ortho-conversion is not particularly limited, and can be performed by any method. For example, a rating point that serves as a reference for horizontal position and height is installed by any method at the facility construction site S, and the first image and the second image are obtained by capturing an image in this state. Then, the obtained first image and second image can be ortho-converted.

[0057] The image generation unit 115 generates a first ortho-image and a second ortho-image based on the conversion result by the conversion unit 114. The first ortho-image is generated by ortho-conversion of the first image. The second ortho-image is generated by ortho-conversion of the second image. By providing the conversion unit 114 and the image generation unit 115, the position and dimensions can be calculated from the first ortho-image and the second ortho-image, and therefore image processing can be easily performed.

[0058] The display control unit 116 causes the display device 120 to display the planned installation position 70 of the sleeve 10 shown on the construction drawing (FIG. 8), and the marking position 11 and the installation position 32 of the sleeve 10 (both shown in FIG. 8) recognized by the recognition unit 111. The image shown in FIG. 8 is displayed by the display control unit 116. The display control unit 116 also displays the processing results by the control unit 110 on the display device 120.

[0059] The display control unit 116 displays the construction drawing and the first and second ortho-images generated by the image generation unit 115 in a superimposed manner on the display device 120. As a result, the display control unit 116 displays the planned installation position 70 (FIG. 8), the marking position 11 (FIG. 8), and the installation position 32 (FIG. 8) of the sleeve 10 on the same screen. In addition, the display control unit 116 also displays the shape and dimensions of the sleeve 10 in the second ortho-image determined by the recognition unit 111 and the calculation unit 113 in a superimposed manner on the same screen displaying the planned installation position 70, the marking position 11, and the installation position of the sleeve 10. According to such a display control unit 116, it is possible to intuitively grasp whether the actual installation position 32 of the sleeve 10 exists at the planned installation position 70 and the marking position 11 of the construction drawing. As a result, the construction drawing, the first and second ortho-images, and the shape and dimensions of the sleeve 10 grasped based on the second ortho-image can be superimposed and confirmed, making it easy to grasp an error in the installation position of the sleeve 10.

[0060] The display control unit 116 creates an electronic whiteboard and displays it on the display device 120. Because an electronic whiteboard is created and displayed, information about the location where the image was taken can be input in advance, and the work time at the facility construction site S can be shortened.

[0061] The external program control unit 117 controls an external program (not shown) that can use the results of processing by the control unit 110, for example.

[0062] The form generation unit 118 creates a drawing that extracts the shape and dimensions of the sleeve 10 in the second image based on the shape and dimensions of the sleeve 10 determined by the recognition unit 111 and the calculation unit 113. By generating a drawing that extracts the shape and dimensions, it becomes possible to make a comparison focusing on the shape and the drawing, and it becomes easier to grasp the discrepancy. The form generation unit 118 generates, for example, the drawing shown in FIG. 9 above. In addition, the form generation unit 118 generates form print data that shows the processing results by the control unit 110.

[0063] The construction management device 100 is configured with, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), a storage medium, etc., none of which are shown in the figure. The storage medium is, for example, a ROM (Read Only Memory), SSD (Solid State Drive), HDD (Hard Disk Drive), USB (Universal Serial Bus) memory, etc. A predetermined control program (a program for realizing the construction management device 100 on a computer) stored in the storage medium is expanded, for example, in the RAM, and executed, for example, by the CPU, thereby realizing the construction management device 100.

[0064] Fig. 11 is a flowchart illustrating a construction management method. Unless otherwise specified, the flow shown in Fig. 11 is executed by the construction management device 100 shown in Fig. 10.

[0065] The manager at the facility construction site S selects whether to take an image of the marking position 11 on the deck surface 60, to measure the dimensions and shape of the installed sleeve 10, or to take an image on the rebar surface 61 by inputting the image to the input unit 103 of the construction management device 100 (step S1). The manager operates the input unit 103 to start the display control unit 116, creates an electronic whiteboard, and displays it on the display unit 121 (step S2). The manager takes an image of the facility construction site S with the camera 50 (step S3). The image is taken at least twice: an image including the marking position 11 and the first scales 41 and 42 before the installation of the sleeve 10, and an image including the mark 30 of the sleeve 10 and the second scales 53, 54, 55, and 56 after the installation of the sleeve 10. Each image is preferably taken multiple times from different angles for ortho-conversion by the conversion unit 114. The first and second images obtained by imaging are transferred to the construction management device 100 automatically by the construction management device 100 or manually by the user (step S4).

[0066] The recognition unit 111 performs a recognition process of the marking position 11 and the sleeve 10 for the first image and the second image (step S5). As a result of the recognition process, the judgment unit 112 judges whether the recognition process has functioned normally or not (step S6). If it is normal (Yes in step S6), the recognition process of the scale is confirmed (step S7). The scale here is the first scale 41, 42 for the first image, and the second scale 53, 54, 55, 56 for the second image. On the other hand, if the judgment in step S6 shows an abnormality, i.e., if it cannot be recognized (No in step S6), the judgment unit 112 displays a reception screen on the display device 120 to accept an operation to re-recognize the marking position 11 or the sleeve 10.

[0067] The manager, having checked the reception screen, determines whether or not a re-recognition operation should be performed. If the manager determines that the construction management device 100 is abnormal but that it has actually been recognized normally and that there is no need for a re-recognition operation, this is input via the touch panel 122 (No in step S9). This causes step S6 to be performed again. On the other hand, if the manager determines that the recognition is actually abnormal, a re-recognition operation is input via the touch panel 122, which causes the recognition unit 111 to perform the re-recognition process (step S10). After this, step S6 is performed again.

[0068] FIG. 12 is a flow chart for explaining the construction management method, and is a flow that follows FIG. 11. The calculation unit 113, the conversion unit 114, and the image generation unit 115 cooperate to generate a first ortho-image and a second ortho-image (both are examples of ortho-images) from the first image and the second image (step S11). The recognition unit 111 determines the shape of the sleeve 10 in the second ortho-image, and the calculation unit 113 determines the dimensions of the sleeve 10 in the second ortho-image (step S12). The display control unit 116 superimposes the construction drawing and the first ortho-image and the second ortho-image generated by the image generation unit 115 on the display device 120 (step S13). The display control unit 116 superimposes the shape and dimensions of the sleeve 10 in the second orthoimage determined by the recognition unit 111 and the calculation unit 113 on the same screen that displays the planned installation position 70 (Figure 8), the marking position 11, and the installation position 32 of the sleeve 10 (Figure 8) (step S13).

[0069] The user, having checked the superimposed display device 120, determines whether or not enlargement, reduction, rotation, or movement is necessary, and if so, operates the touch panel 122. This accepts the operation (Yes in step S14), and the display control unit 116 enlarges, reduces, rotates, or moves the first orthoimage and the second orthoimage in accordance with the operation (step S16). This allows the first image, the second image, and the construction drawing to be appropriately superimposed and displayed. On the other hand, if the operation is not accepted (No in step S14), steps S15 and S18 are performed in the same manner as steps S9 and S10 described above.

[0070] On the other hand, if it is not necessary (No in step S15), the display control unit 116 displays a screen for confirming whether or not to save the data on the display device 120 (step S17). If it is necessary (Yes in step S17), the administrator operates the touch panel 122 to start the recording unit 104, and the recording unit 104 performs data saving processing (step S20). On the other hand, if it is not necessary (No in step S17), the display control unit 116 displays a screen for confirming whether or not to print on the display device 120 (step S19). If printing is necessary (Yes in step S19), the administrator operates the touch panel 122 to start the form generation unit 118, and the form generation unit 118 creates a drawing, for example, as shown in FIG. 9 above, and the printing unit 105 prints the drawing (step S22). However, other drawings, screens, images, etc. may be printed.

[0071] Finally, the display control unit 116 displays a screen for confirming the end of processing on the display device 120 (step S21). If the processing is to be ended (Yes in step S21), the manager operates the touch panel 122 to indicate the end, and the construction management device 100 goes into a standby state. On the other hand, if the processing is to be continued (No in step S21), steps S13 and onward are repeated.

[0072] According to the above construction management method and construction management device 100, it is easy to know whether the installation of the sleeve 10 has been performed according to the construction drawings. In addition, since the shape and dimensions can be understood based on the first and second images, the number of confirmations at the facility construction site S can be reduced. This reduces the number of management and inspection man-hours for the installation of the sleeve 10. In addition, since the construction drawings, the first and second images, the dimensions and shape can be superimposed and a form can be output, the work of creating a separate record form can be reduced. Furthermore, by incorporating an electronic whiteboard function, information on the imaged location can be input in advance, thereby shortening the work time at the facility construction site S. [Explanation of symbols]

[0073] 10 Sleeve 100 Construction management equipment 1000 Construction Management System 101 Communications Department 102 Image input unit 103 Input section 104 Recording Section 105 Printing Department 11 Marking position 110 Control section 111 Recognition part 112 Judgment Department 113 Arithmetic section 114 Conversion unit 115 Image Generation Unit 116 Display control unit 117 External program control unit 118 Report Generation Unit 12 Reference line (return core) 120 Display device 121 Display section 122 Touch Panel 13 Reference line (return core) 15 Sleeves 20 Rod 21 Pen 22,23 beam 24,25 Reference Line 30 Landmark 31 Simulation Plate 32 Installation position 41,42 1st standard 50 Camera 51,52 Imaging range 53,54,55,56 2nd standard 57 Imaging section 58 Preservation Department 59 Communications Department 60 Deck surface 61 Reinforced Concrete Surface 63 Placement table 70 Planned installation location indicated on construction drawings S Equipment construction site S101 Step (First Imaging Step) S102 Step (Second imaging step) S103 Step (display process)

Claims

1. a first imaging step of imaging a first image including a marking position corresponding to a planned installation position of the managed object at an equipment construction site and a first reference scale having a predetermined length; a second imaging step of capturing a second image including the installed management object and a second reference scale having a predetermined length after the management object is installed; A display step of displaying on a display device the planned installation position of the managed object shown in the construction drawing, the marking position included in the first image, and the installation position of the managed object included in the second image. A construction management method comprising:

2. In the first imaging step, an image is taken in a state where a mark for recognizing the marking position in the first image is attached to the marking position, and In the second imaging step, an image is taken of the managed object with the mark attached thereto so as to be recognized in the second image. The construction management method according to claim 1 .

3. The mark is a mark that imitates the shape and size of the managed object when viewed from above. The construction management method according to claim 2 .

4. The mark further includes the marking position where the mark is attached and identification information of the managed object.

4. The construction management method according to claim 2 or 3.

5. The first and second scales are arranged in the same direction as a predetermined reference line and in a direction passing through the marking position and a predetermined position of the managed object. The construction management method according to any one of claims 1 to 3.

6. The reference line is a center line. The construction management method according to claim 5 .

7. The second imaging step is performed by placing the second scale at a predetermined height based on the floor surface at the time of the first imaging step; In the display step, a height dimension of the managed object is calculated and displayed based on a height direction position of the second standard scale from the floor surface serving as a reference, a height direction position of the floor surface at the time of the first imaging step, and a height direction position of the floor surface at the time of the second imaging step. The construction management method according to any one of claims 1 to 3.

8. a recognition unit that recognizes the marking position, the installation position of the managed object, the first scale, and the second scale in each of a first image, which is captured before installation of the managed object at a facility construction site and includes a marking position corresponding to a planned installation position of the managed object and a first standard scale having a predetermined length, and a second image, which is captured after installation of the managed object and includes the installed managed object and a second standard scale having a predetermined length; A display control unit that displays on a display device the planned installation position of the managed object shown on a construction drawing, the marking position recognized by the recognition unit, and the installation position of the managed object. A construction management device characterized by:

9. A conversion unit that performs ortho-conversion of the first image and the second image; An image generating unit that generates a first orthoimage and a second orthoimage based on a conversion result by the conversion unit, The recognition unit recognizes the marking position, the installation position of the managed object, the first standard scale, and the second standard scale based on the first ortho-image and the second ortho-image. The construction management device according to claim 8 .

10. a calculation unit for determining a dimension of the managed object in the second image; The recognition unit determines at least a shape of the managed object in the second image; The display control unit is The construction drawing, the first ortho-image, and the second ortho-image are superimposed on the display device to display the planned installation position, the marking position, and the installation position on the same screen, The shape and dimensions of the managed object in the second ortho-image determined by the recognition unit and the calculation unit are displayed on the same screen. The construction management device according to claim 9 .

11. A determination unit is provided for determining whether the actually installed managed object, the first scale, and the second scale have been correctly recognized by the recognition unit. The construction management device according to any one of claims 8 to 10.

12. When the determination unit cannot recognize the marking position in the first image or the managed object in the second image, the determination unit displays, on the display device, a reception screen for receiving a re-recognition operation of the marking position in the first image or the managed object in the second image from a user. The construction management device according to claim 11.

13. the recognition unit recognizes the managed object by comparing, for each pixel of the second image, an index value which is at least one of luminance, hue, saturation, and brightness with a first threshold which is the index value at which the managed object can be recognized; The determination unit changes the first threshold value for each pixel, which is predetermined for recognizing the managed object, to a second threshold value at which the managed object can be recognized. The construction management device according to claim 12.

14. The display control unit displays, on the display device, reference lines drawn at predetermined intervals from a center line that is a position reference. The construction management device according to any one of claims 8 to 10.

15. The recognition unit determines at least a shape of the managed object in the second image; a calculation unit for determining a dimension of the managed object in the second image; a form generating unit that generates a drawing by extracting the shape and dimensions of the managed object in the second image. The construction management device according to any one of claims 8 to 10.

Images