WO2020179336A1 - Method for measuring thickness of coating material, system for measuring thickness of coating material, and method for constructing coating material - Google Patents

Abstract

[Problem] To provide: a method for measuring the thickness of a coating material provided to, inter alia, a wall of a building; a system for measuring the thickness of a coating material; and a method for constructing a coating material. [Solution] A method for measuring the thickness of a coating material, the method having a step for installing a reference marker (step 1), a step for acquiring a construction shape that includes three-dimensional coordinates of the surface of the coating material and three or more reference three-dimensional coordinates (step 2), a step for calculating a virtual plane within the construction shape (step 3), a step for calculating the thickness of the coating material (step 4), and a step for displaying an image of the coating material (step 5).

Description

Coating material thickness measuring method, coating material thickness measuring system, and coating material construction method

The present invention relates to a coating material thickness measuring method, a coating material thickness measuring system, and a coating material construction method that are applied to a target surface such as a wall or floor of a building by a spraying method or the like.

As a method of providing a heat insulating material on the wall of a building, an operator uses a foaming machine on site to apply the foaming material as the main raw material to the target surface such as the wall, floor, roof or ceiling of the building. A method is known in which the added foaming stock solution is directly sprayed to solidify the foam. However, since the heat insulating material has a great effect on the heat insulating effect, the heat insulating material is required to have a uniform thickness. In particular, in buildings, apartment houses, etc., it is required to provide uniform quality, and construction with a thickness error of 0 to 20 mm and a severe one of 0 to 5 mm is required. That is, after blowing a foaming material on the target surface to foam and solidify it, it is necessary to check the thickness, cut the excess portion for the portion that is too thick, and add an additional finishing treatment for the portion that is too thin. For details, at the construction site, while spraying, needle-shaped measuring gauges are pierced in various parts of the foamed and solidified heat insulating material, the thickness is measured, and it is confirmed whether finishing treatment is required in each part. .. Therefore, the construction work of the heat insulating material is one of the very complicated work for the worker. In addition, the work speed varies greatly depending on the skill level of the operator, and the quality also varies.
Furthermore, when reporting to the owner, etc. to guarantee the quality of the heat insulating material, the construction thickness is checked by inserting measurement gauges at various places in the construction site, and a mark (for example, the measured value of the thickness) related to the result is displayed. This was done by marking on the surface of the heat insulating material (wall) and presenting a photograph of a part of the surface. In this way, inserting the measurement gauge many times may cause physical damage to the heat insulating material, and it is possible to obtain only scattered measurement values, and sufficient quality control cannot be performed.

U.S. Pat. No. 5,837,058 discloses a method and robot comprising a spray nozzle connected to a source of foam and a sensing device configured to monitor the coating thickness. In the method of Patent Document 1, the finishing process can be reduced by controlling the spraying amount of the foaming material while monitoring the spraying thickness with a laser range finder.
Patent Document 2 discloses a remotely controllable robot arm having a spray nozzle and a range finder at its tip. There is a description that this robot arm can measure the material (object) before and after application with a range finder and calculate the thickness to be supplemented.

JP, 2016-526121, A JP, 2017-536976, A

However, although the method of Patent Document 1 presupposes the use of a robot, the use of the robot is not always advantageous in a messy field. On the other hand, it is conceivable that the method of Patent Document 1 is performed by an operator, but since the thickness is controlled by spraying the foam material while monitoring the thickness at any time with a laser range finder instead of the measuring gauge. The spraying work and the confirmation of the thickness (confirmation of the monitor) are performed alternately, and the work is complicated. For example, human error such as mistaking the monitor is likely to occur. Further, Patent Document 2 does not measure the entire material to be applied (target surface), but measures a part of the material to be applied (target surface) at any time, and has the same problem as Patent Document 1.
An object of the present invention is to provide a method for measuring the thickness of a covering material to be applied to a target surface such as a wall of a building, a system for measuring the thickness of the covering material, and a method for constructing the covering material.

The present invention is a method for measuring the thickness of a covering material applied to a target surface, which is three-dimensional coordinates of the surface of the covering material, and three-dimensional equidistant points of three or more points having the same distance from the target surface. The process of acquiring the construction shape including the reference three-dimensional coordinates of one or more reference points whose coordinates and the distance from the target surface are known, the three-dimensional coordinates of the surface of the covering material, and the three-dimensionality of the equidistant points. Calculating the thickness of the covering material based on the coordinates and the reference three-dimensional coordinates.
In the present invention, the “thickness of the covering material” refers to the length in the direction perpendicular to the target surface. The “three-dimensional coordinate of the surface of the covering material” means the three-dimensional coordinate on the surface of the covering material exposed on the space side opposite to the target surface. For example, a set of three-dimensional coordinates of a plurality of points on the surface of a covering material can be mentioned. Furthermore, the "distance from the target surface" means the length of a perpendicular line drawn from that point to the target surface.
The method of expressing the three-dimensional coordinates is not particularly limited as long as it can be processed on a computer. For example, it may be represented by a set of coordinate values of the (X, Y, Z) three-dimensional Cartesian coordinate system (so-called point cloud data), a polygon mesh, a plane / curved surface formula or parameter representation, or It may be a volume data representation (voxel, etc.) and a combination thereof.

In the coating material thickness measuring method of the present invention, the three-dimensional coordinates of the surface of the coating material and the three-dimensional coordinates of three or more equidistant points having the same distance from the target surface and the distance from the target surface are known. Since the construction shape that includes the reference three-dimensional coordinates of one or more reference points is the same plane coordinates (plane coordinates parallel to the target surface) as the predetermined point of the covering material, The virtual point whose distance is the same as the reference three-dimensional coordinate is obtained, and the thickness of the predetermined point of the covering material is calculated by comparing the predetermined point of the covering material with the virtual point whose distance to the target surface is known. Can be calculated.

It is preferable that the method for measuring the thickness of a covering material of the present invention is such that the distance of the equidistant point from the target surface is known and the equidistant point is also the reference point. Further, it further includes a step of calculating a virtual plane based on the acquired three-dimensional coordinates of the equidistant points, and calculates the thickness of the covering material based on the three-dimensional coordinates of the surface of the covering material and the virtual plane. It is more preferable to do so.
Alternatively, in the method for measuring the thickness of a covering material of the present invention, it is preferable that the distance of the equidistant point from the target surface is unknown and the reference point is different from the equidistant point. Further, it further includes a step of calculating a virtual plane based on the acquired three-dimensional coordinates of the equidistant point and the reference three-dimensional coordinates, and the covering is based on the three-dimensional coordinates of the surface of the covering material and the virtual plane. More preferably, the thickness of the material is calculated.
The "virtual plane" refers to a plane whose distance to the target surface is known and is parallel to the target surface, and preferably includes the reference three-dimensional coordinates, but may not be included.
When the thickness of the covering material is calculated based on the virtual plane as described above, the thickness of the covering material can be calculated by calculating the distance between the virtual plane and the surface of the covering material. In particular, when the virtual plane includes at least a plane in which the target surface is translated in the direction perpendicular to the target surface, the thickness of the entire covering material can be calculated by one calculation. After applying the covering material in this way, the thickness of the entire covering material can be calculated by one measurement, which is preferable.

A method for measuring the thickness of a covering material according to the present invention, which comprises a step of setting a reference marker on the covering material or in the vicinity of the covering material before the step of acquiring the construction shape, and the reference three-dimensional shape. The coordinates are preferably three-dimensional coordinates on the reference marker. In this case, it is preferable to install three or more reference markers and set at least one reference three-dimensional coordinate for each reference marker, because three or more reference three-dimensional coordinates with the same distance from the target surface can be obtained. Further, the reference marker has a pin extending in one direction, and the step of installing the reference marker is a step of inserting the pin into the covering material so that a tip of the pin contacts the target surface. Is preferred.

In the method for measuring the thickness of a covering material of the present invention, it is preferable that the equidistant points are points on the surface of the covering material and a structure adjacent to or near the target surface.
Here, the "structure" is a structure including a plane parallel to the target surface, and the "surface of the structure" includes a plane whose distance to the target surface is known and which is parallel to the target surface. To say. For example, it is a wall surface that is flush with the wall surface that is the target surface, or the surface of a pillar or beam that is built in parallel with the wall surface that is the target surface.
Also in this case, the thickness of the covering material can be easily calculated. In particular, if the distance between the target plane and the plane parallel to the target plane of the structure can be accurately grasped from the design drawing, the equidistant points on the surface of the structure are known to be the distance from the target plane, It can be an equidistant point and at the same time a reference point. Therefore, it is not necessary to install the reference marker, and human error when installing the reference marker can be reduced. If the distance between the surface parallel to the target surface of the structure and the target surface is unknown, one or more reference markers are provided on or near the coating material, and three or more equidistant points on the surface of the structure. And, the thickness of the covering material can be calculated based on the reference three-dimensional coordinates on the reference marker.

It is preferable that the method for measuring the thickness of a covering material of the present invention includes a step of displaying a covering material image showing the distribution of the thickness of the covering material in color or shading.
In the covering material image in which the thickness distribution is shown by color or shading in this way, the defective part of construction can be confirmed at a glance, and the work speed can be increased. Also, it is preferable because it is easy to see as the data of the covering material for quality control.

It is preferable that the method for measuring the thickness of the covering material of the present invention includes a step of determining the presence or absence of a construction defective portion where the thickness of the covering material is out of a predetermined range. In particular, it is preferable to have a step of displaying the defective construction site on the covering material image.
If the location of the defective work is known in this way, it is easy to identify the finishing treatment of the covering material. In particular, the work defect determination image has high workability.

It is preferable that the method of measuring the thickness of the coating material according to the present invention further includes a step of storing the thickness of the coating material in association with the target surface. In particular, it is preferable to have a step of storing the covering material image in association with the target surface. It is preferable to have a step of measuring the moisture content of the target surface and a step of storing the moisture content in association with the thickness of the coating material before applying the coating material. Alternatively, it is preferable to have a step of measuring the temperature distribution of the target surface and a step of storing the temperature distribution in association with the thickness of the covering material before applying the covering material. Further, it is preferable that the coating material is a sprayed hard urethane foam heat insulating material, and the method includes a step of acquiring a spraying condition of the coating material and a step of storing the spraying condition in association with the thickness of the coating material.
By thus storing the thickness of the covering material and various data in association with each other, it is easy to manage the data as the covering material. For example, when there are many target surfaces such as buildings and apartments, it is easy to manage. In particular, by storing the thickness of the covering material in association with the moisture content, temperature distribution and / or spraying conditions of the target surface, it is more preferable in terms of quality control as the data of the covering material.

The coating material thickness measurement system of the present invention is a system for measuring the thickness of a coating material applied to a target surface, including a three-dimensional measuring device and a data processing unit, the three-dimensional measuring device, Three-dimensional coordinates of the surface of the covering material, three-dimensional coordinates of three or more equidistant points having the same distance from the target surface, and reference three-dimensional of one or more reference points whose distance from the target surface is known. The feature is that the construction shape including the coordinates is acquired, and the data processing unit calculates the thickness of the covering material based on the construction shape.
By using this measuring system, the thickness of the covering material can be accurately measured with one measurement.

In the coating material thickness measurement system of the present invention, it is preferable that the distance of the equidistant point from the target surface is known, and the equidistant point is also the reference point. Alternatively, in the coating material thickness measurement system of the present invention, it is preferable that the distance of the equidistant point from the target surface is unknown and the reference point is different from the equidistant point.

The coating material thickness measuring system of the present invention further includes a reference marker installed on or in the vicinity of the coating material, and the data processing unit is a color or shape from the construction shape. Those that recognize the reference marker based on characteristics are preferable.
By automatically recognizing the reference marker from the construction shape and at the same time recognizing the three-dimensional coordinates on the reference marker as the reference three-dimensional coordinates, the reference marker can be recognized accurately and quickly.

A second aspect of the coating material thickness measuring system of the present invention is a system for measuring the thickness of a coating material applied to a target surface, which includes a three-dimensional measuring device, a data processing unit, and a user. The data processing unit is provided with a display unit provided in front of the user's eyes, and the data processing unit has three points where the three-dimensional coordinates of the surface of the covering material acquired by the three-dimensional measuring device and the distance from the target surface are the same. The thickness of the covering material is calculated based on the three-dimensional coordinates of the above equidistant points and the reference three-dimensional coordinates of one or more reference points whose distances from the target surface are known, and the thickness of the covering material. Is calculated, and the display unit displays the covering material image in an overlapping manner on the covering material in the field of view of the user.
In the second aspect of the coating thickness measuring system of the present invention, it is preferable that the distance of the equidistant point from the target surface is known and the equidistant point is also the reference point. Alternatively, in the second aspect of the coating material thickness measuring system of the present invention, the distance of the equidistant point from the target surface is unknown, and the reference point is different from the equidistant point. Is preferable.
According to the second aspect of the coating material thickness measuring system of the present invention, the user can confirm the thickness of the coating material on site by mounting the device equipped with the display unit by the user. Therefore, the finishing work time can be shortened.

In such a three-dimensional shape measuring system for a covering material, an image acquiring unit for photographing the visual field direction of the user's eye is provided, and the covering material is provided on the surface of the covering material on the image photographed by the image acquiring unit. Those that overlap the images are preferred.
Further, it is more preferable that the three-dimensional measuring device, the display unit, and the data processing unit are integrally configured to form a wearable computer system that can be worn by the user. For example, a head-mounted device such as a head-mounted display (HMD) or smart glasses may be used. This makes it possible to perform the finishing work after construction while checking it in real time. As a result, even if the skill level of the operator is low, the coating material can be applied to a uniform thickness without failure or redone of the installation. In addition, the thickness check work after construction, which was conventionally required repeatedly for each finishing work, becomes unnecessary.

The method of applying a coating material of the present invention is a method of applying a coating material to a target surface, the step of applying the coating material to the target surface, the three-dimensional coordinates of the surface of the coating material, from the target surface The step of acquiring the three-dimensional coordinates of three or more equidistant points having the same distance and the reference three-dimensional coordinates of one or more reference points whose distances from the target surface are known, and the tertiary of the surface of the covering material. Original coordinates, a step of calculating the thickness of the covering material based on the three-dimensional coordinates of the equidistant points and the reference three-dimensional coordinates, and the thickness of the covering material is out of a predetermined range It is characterized by having a step of judging the presence or absence.
It is preferable that the method for constructing the covering material of the present invention is such that the distance of the equidistant point from the target surface is known and the equidistant point is also the reference point. Alternatively, in the method of constructing the covering material of the present invention, it is preferable that the distance of the equidistant point from the target surface is unknown and the reference point is different from the equidistant point.
Since the method of applying the covering material of the present invention uses the method of measuring the thickness of the present invention, it is possible to confirm at a glance the defective part of the coating, and the covering material of uniform quality is not limited to the skill level of the operator. Can be provided.

According to the present invention, a worker on site can grasp the thickness of the applied covering material with one measurement. Therefore, it is possible to easily perform a finishing process on a portion having a poor construction. Furthermore, it can be left as objective data on the quality of the covering material.

It is a flowchart which shows 1st Embodiment of the thickness measuring method of the coating material of this invention. 2a is a front view showing a construction shape, FIG. 2b is a sectional view taken along line XX, and FIG. 2c is a perspective view showing the construction shape in which a virtual plane is calculated. It is a flowchart which shows 2nd Embodiment of the thickness measuring method of the coating material of this invention. It is a perspective view which shows the construction shape which calculated the virtual plane used in 2nd Embodiment of the thickness measuring method of the coating material of this invention. It is a block diagram which shows the structure of 1st Embodiment of the thickness measuring system of the coating material of this invention. It is a block diagram which shows the structure of 4th Embodiment of the thickness measuring system of the coating material of this invention. It is an image which shows the construction shape containing the three-dimensional shape of the surface of a heat insulating material. 8a and 8b are covering material images showing the distribution of the thickness of the heat insulating material. It is a flowchart which shows 3rd Embodiment of the thickness measuring method of the coating material of this invention. It is a perspective view which shows the construction shape which calculated the virtual plane used in the 3rd Embodiment of the thickness measurement method of the covering material of this invention.

Next, a first embodiment of a method for measuring the thickness of a covering material applied to a target surface (hereinafter referred to as a thickness measuring method) will be described with reference to the flowchart of FIG.
In the present embodiment, the thickness of the covering material is calculated based on three-dimensional coordinates of three or more points whose distances from the target surface are known and equal. These three or more points are equidistant points having the same distance from the target surface, and at the same time, are reference points whose distances from the target surface are known.

First, the covering material measured by the thickness measuring method of the embodiment is covered by an operator or the like by applying it to the target surface at the site.
Examples of the target surface (construction surface) include walls, floors, roofs, ceilings, rooftops, etc. of buildings, and are particularly useful for parts where thickness measurement is difficult, such as roofs and ceilings.

As the covering material, heat insulating material, fireproof material, waterproof material, general building material (FRP, FRC, FRG) and the like can be mentioned. Examples of the heat insulating material include soft or hard urethane foam, rock wool, and cellulose fiber. In particular, an on-site foaming type hard urethane foam (for example, a hard urethane foam defined in JIS A9526) constructed by the spraying method is preferable. With urethane foam with a high reaction rate using potassium octylate or lead octylate, the undiluted foaming solution sprayed on the target surface expands irregularly to a foaming ratio of 20 to 120 times, so even an expert can This is because it is difficult to apply a uniform thickness (about 10 to 200 mm), and the applied thickness directly affects the heat insulation performance. On the other hand, examples of the waterproof material include urethane-based, FRP-based, acrylic rubber-based, acrylic resin and the like.

　As for the construction method, spraying or application can be mentioned. In particular, the coating material applied by spraying is suitable for the thickness measuring method of the present invention because it is difficult to make the thickness after application uniform as compared with the coating.

Next, the process will be explained. As shown in the flowchart of FIG. 1, the thickness measuring method includes a step of setting a reference marker (first step), three-dimensional coordinates of the surface of the covering material, and reference three-dimensional coordinates of three or more reference points. A step of acquiring a construction shape (second step), a step of calculating a virtual plane (third step), a step of calculating the thickness of the covering material (fourth step), and a step of displaying the covering material image. (Fifth step), a step of determining whether finishing processing is necessary based on the covering material image (sixth step), and a step of performing finishing processing when it is determined that finishing processing is necessary (seventh step) And a step (eighth step) of storing the three-dimensional data of the covering material in association with the target surface when it is determined that the finishing process is not necessary.

In the first step, a reference marker is set on the covering material. Specifically, the reference marker is installed on the covering material at a position separated from the target surface by a predetermined distance. For example, in FIGS. 2a and 2b, reference numeral 11 is a wall (target surface), reference numeral 12 is a covering material, and reference numeral 13 is a disc-shaped reference marker. This reference marker gives a reference point that serves as a reference when calculating the virtual plane in the third step and its reference three-dimensional coordinates. In the following, the distance between the target surface and the reference point may be referred to as “reference distance”.

The reference marker 13 is provided on the head of the pin 13a, for example, as shown in FIG. 2b. Then, the pin 13a is pierced into the covering material 12 so that the pin 13a is perpendicular to the target surface (so that the plane of the head of the pin 13a is parallel to the target surface), and the tip of the pin 13a is aimed at the target surface. By making contact with each other, the reference marker 13 can be provided on the covering material 12. The distance from the reference marker 13 to the wall 11 at this time is L (pin length+thickness of the reference marker 13). That is, the length of the perpendicular line drawn from the reference marker 13 to the target surface becomes the distance L, and any point on the reference marker can be set as the reference three-dimensional coordinate. The length of the pin 13a is substantially the same as or slightly larger than the planned thickness of the covering material 12. As a result, the reference marker 13 is not buried in the covering material 12 that has been constructed to a predetermined thickness.

In FIG. 2, four reference markers 13 are provided, and at least one reference three-dimensional coordinate is set for each reference marker. In order to estimate the virtual plane, it is preferable to provide three or more reference markers. However, one or two reference markers may be provided by setting a plurality of reference three-dimensional coordinates in one reference marker. It can be appropriately determined according to the required accuracy. When a plurality of reference markers are provided, all the reference markers should be installed at the same distance from the target surface.
The reference marker 13 is a disk-shaped one, but may be a sphere, a cube, or a polygonal flat plate such as a triangle or a square. The shape of the reference marker 13 is not particularly limited, but it is preferable if it has the geometric features as listed above because it can be easily recognized automatically by image processing. Further, it is preferable to use a reference marker of a predetermined color. For example, if the head of the reference marker is set to a predetermined color that can be easily identified with a covering material such as red, blue, or green as a background, it becomes easy to automatically recognize the reference marker by using the color feature as a clue. When a flat plate is used, it is important that the flat plate be parallel to the target surface when installed.
Further, the pin 13a that supports the reference marker 13 is not particularly limited. For example, the reference marker may be supported by three or more pins. In this case, the three pins 13a can be made perpendicular to the target surface by piercing the covering material 12 so that the tips of the three pins come into contact with the target surface (wall 11). Can easily place the reference marker at a predetermined distance from the target surface.

The second step is to obtain a construction shape including the three-dimensional coordinates of the surface of the covering material and the reference three-dimensional coordinates of three or more reference points whose distances from the target surface are known and are substantially the same. Specifically, the construction shape including the three-dimensional coordinates of the surface of the covering material 12 and the three-dimensional coordinates of the surface of the reference marker 13 is acquired. For example, the construction shape 10 of FIGS. 2a and 2b includes the three-dimensional coordinates of the covering material 12 and the three-dimensional coordinates of the surfaces of the four reference markers 13 (reference three-dimensional coordinates).
“Acquisition of construction shape” means acquisition of the three-dimensional shape of the target surface by a set of three-dimensional coordinates, for example. For example, point cloud data obtained by scanning the target surface with a three-dimensional measuring device or the like can be mentioned.

As the three-dimensional measuring device, it is acquired by a three-dimensional measuring device such as a three-dimensional scanner or a stereo camera. A three-dimensional scanner irradiates a target surface with laser light and calculates the three-dimensional shape of the target surface based on the reflected light (so-called LIDAR method), and measures the distance by the time it takes for the irradiated light to be reflected and returned. There is something to measure (TOF method). On the other hand, the stereo camera calculates the three-dimensional shape from the images of the target surface captured by the two cameras based on the principle of triangular measurement, and is separately measured by a projector in order to improve the matching accuracy of the images of the two cameras. There is also a method of projecting a pattern or a method of replacing one of the two cameras with a projector that projects pattern light (so-called active stereo method). Although it is sufficient to select an appropriate device in consideration of measurement accuracy, measurement speed, and cost, the floor plan of the room with the target surface varies depending on the building, so the accuracy is relatively stable. A scanner is preferred. On the other hand, considering the complexity of installing a scanner on site, an active stereo type handy scanner capable of capturing a wide target surface at a time is preferable.
Further, it is preferable that the construction shape includes target color information. For example, when a color camera is used for three-dimensional measurement, a color image can be acquired at the same time as the three-dimensional coordinates, and point cloud data to which color information is added can be generated. The reference marker and the covering material area can be recognized based on the color information of the construction shape.

③ In the third step, a virtual plane is calculated. Specifically, based on the reference marker 13 (reference three-dimensional coordinates), the virtual plane S obtained by translating the target surface in parallel with the target surface by a predetermined distance in the vertical direction is calculated within the construction shape. The target surface may be calculated based on the reference three-dimensional coordinates.

FIG. 2c is a construction shape 10a in which the virtual plane S is calculated. The calculation method of the virtual plane S uses four reference markers 13 separated from the target surface (wall 11) at a predetermined distance.
Specifically, first, four reference markers are recognized from the construction shapes based on the characteristics of the color and shape. For example, when a red reference marker is used, the red region can be recognized as a reference marker from the construction shape. For such recognition, the operator may manually indicate the position of the reference marker on the screen, or the processing unit of the computer may automatically recognize the position.
Next, three or more reference three-dimensional coordinates are extracted from the recognized four reference markers. For example, the barycentric coordinates of each reference marker may be the reference three-dimensional coordinates. It is not always necessary to use all four reference markers, and a plurality of reference three-dimensional coordinates may be extracted from one reference marker. Next, the plane S1 is estimated based on the extracted three or more reference three-dimensional coordinates. At this time, it is expected that the respective reference three-dimensional coordinates will not strictly be on the same plane due to the measurement error of the three-dimensional measuring device and the influence of the inclination of the reference marker with respect to the target surface. Therefore, the plane may be fitted to the plurality of reference three-dimensional coordinates. Known techniques can be used for this. For example, the least squares method may be used to obtain the least squares plane for a plurality of reference three-dimensional coordinates. This plane S1 is parallel to the wall 11 and is separated by a predetermined distance L. The virtual plane S is calculated by expanding the plane S1 to a position and size obtained by translating the target plane in the direction perpendicular to the target plane by a predetermined distance. The virtual plane S may be calculated at a position separated from the target surface by a predetermined reference thickness. At this time, if the covering material is constructed according to the reference thickness, the surface of the covering material coincides with the virtual plane S.

The fourth step is to calculate the thickness of the covering material. Specifically, in the construction shape for which the virtual plane is calculated, the thickness of the covering material is calculated based on the virtual plane calculated based on the three-dimensional coordinates of the surface of the covering material and the reference three-dimensional coordinates.
Specifically, the distances between the points on the surface of the covering material and the points on the virtual plane that intersect the vertical line with respect to the target surface are calculated, and the distance L on the virtual plane with respect to the target surface is taken into consideration to determine the points on the surface of the covering material. Calculate the thickness. That is, as shown in FIG. 2c, the distance between the point C1 on the surface of the covering material intersecting the vertical line V1 with respect to the target surface and the corresponding point T1 on the virtual plane is Z1, and the point C1 covers the virtual plane S. If so, the thickness of the point C1 of the covering material is LZ1. On the other hand, when the distance between the point C2 on the surface of the covering material that intersects the vertical line with respect to the target surface and the point T2 on the corresponding virtual plane is Z2, and the point C2 protrudes from the virtual plane S, the point of the covering material. The thickness of C2 is L + Z2 (not shown). With this method, the thickness of the covering material in the entire region can be calculated. Such a calculation may be obtained by subtracting the point cloud coordinates of the surface of the covering material and the point cloud coordinates of the virtual surface, or the difference may be calculated by converting the point cloud to a mesh and calculating the faces. ..

In the fifth step, the covering material image is displayed. More specifically, it is an image showing the surface of the covering material, and a covering material image showing the distribution of the thickness of the covering material in color or shading is calculated and displayed.
Examples of the image displaying the surface of the covering material include a perspective image expressed three-dimensionally and a two-dimensional image obtained by projecting the construction shape on a predetermined plane (for example, a plane parallel to the target surface).

In the sixth step, it is determined whether the finishing process is necessary based on the image of the covering material. Specifically, based on the covering material image, it is confirmed whether there is a construction defective part where the thickness of the covering material is out of the predetermined range, and if there is a construction defective part, it is judged that finishing treatment is necessary, and the construction defective part is determined. If not, it is judged that the finishing process is unnecessary. Further, it is calculated how thick or thin the part of the covering material is from a predetermined reference thickness, and it is determined whether or not the thickness is within a predetermined range. When the covering material is a heat insulating material, an example of the construction standard is a range of −0 mm to +20 mm with respect to the standard thickness of 30 mm (a portion thinner than the standard is defective, and a thick portion is allowed up to 20 mm). It can be set more strictly in the range of −0 mm to +5 mm. For example, in the covering material image of the fifth step, the defective construction portion may be displayed in color or shade (construction defectiveness determination image). Further, for example, in the covering material image, the portion may be specified by a lead line, and a numerical value indicating how much the portion deviates from a predetermined value may be indicated. In this way, by specifying the defective location and clarifying the degree of failure, it is easy to perform the finishing process in the seventh step.
Then, when it is determined that the finishing process is necessary, the process goes to the seventh step, and when it is determined that the finishing process is unnecessary, the process goes to the eighth step.

A 7th process performs a finishing process, when it determines that a finishing process is required. That is, in the sixth step, when it is determined that the finishing process is necessary, the finishing process is performed on the portion requiring the finishing process so that the thickness of the covering material falls within the predetermined range. Specifically, the surplus is cut for a portion thicker than a predetermined range, and additional spraying or coating is applied to a portion thinner than a predetermined range. In addition, after performing the finishing process, the process returns to the second step to acquire the construction shape.
Then, in the sixth step, the second to seventh steps are repeated until the finishing process is unnecessary.

In the eighth step, when it is determined that the finishing process is not necessary, the three-dimensional shape of the surface of the covering material and the thickness of the covering material, in particular, the covering material image and the target surface are stored as a database. That is, in the sixth step, when it is determined that the finishing process is not necessary, the construction of the covering material is completed and the data is saved. For example, by storing the position information and identification information of the target surface in association with the covering material image, such as the wall on the east side of Room 102, the data of the database managed for each target surface (wall) can be obtained. be able to. Moreover, when 3D CAD data of the building exists, it is preferable to store the 3D CAD data in association with the 3D CAD data. In particular, more efficient process control/quality control is possible by storing the BIM (Building Information Modeling) that has been proposed in recent years in association with the BIM (Building Information Modeling). In particular, it is easy to manage when there are many target surfaces such as buildings and apartments. The three-dimensional shape before finishing may be stored together. This makes it possible to track the work process.
Note that these data are preferably stored as an electronic file that cannot be edited with security set with a password, for example. In particular, it is preferable that the electronic file is a non-falsification proof and a time proof by adding a time stamp. By making the electronic file non-editable in this way, the objectivity of the data can be maintained.

As described above, the method for measuring the thickness of the covering material according to the present embodiment calculates a virtual plane in which the target surface is translated in the vertical direction with respect to the target surface by a predetermined distance based on the reference three-dimensional coordinates within the construction shape. However, since the thickness of the covering material is calculated from the surface of the covering material and the virtual plane, the thickness of the covering material is not measured while piercing a pin etc. , The total thickness of the covering material is known. Further, the finishing treatment of the covering material is also easy. Particularly, by using the covering material image, the location of the finishing process can be easily specified.
The method of constructing the covering material using this thickness measuring method is not limited to the skill level of the operator, and can provide a covering material of uniform quality.

The method for measuring the thickness of the covering material of the first embodiment using the reference marker is not limited to the above.
For example, in the step of installing the reference marker (first step), the reference marker is installed on the covering material, but the reference marker may be installed in the vicinity of the covering material. For example, a reference marker may be placed on a pillar around the covering material. Where to place the reference marker can be appropriately determined according to the target surface.
Further, in the step of creating a covering material image (fifth step), a covering material image in which the thickness is shown by color or shading is given, but a projected image or three-dimensional of the covering material in which no color or shading is provided depending on the thickness. It may be an image (perspective image). Further, in the fifth step, not only the image is displayed, but also a table in which the position data on the target surface and the thickness data of the covering material are associated with each other may be displayed.

Alternatively, before the covering material is applied, the moisture content of the target surface may be measured and the moisture content may be stored in association with the thickness of the coating material, particularly the coating material image. Since the foaming agent of rigid urethane foam contains water, if the target surface (wall surface) contains a large amount of water, the reaction balance may be lost and the quality as a heat insulating material may deteriorate. Therefore, by storing the moisture content of the wall surface before construction together with the data of the heat insulating material, a more detailed database can be constructed. For the measurement of the water content, an existing high-frequency water meter “HI-520-2 manufactured by Kett Scientific Research Institute Co., Ltd.” or the like can be used.
In addition, before applying the coating material, the temperature distribution of the target surface is measured using a thermo camera or the like, and the temperature distribution is measured by the three-dimensional shape of the surface of the coating material and the thickness of the coating material, particularly the coating material image. It may be stored in association with. Since the temperature of the sprayed surface of the rigid urethane foam may affect the quality, it is preferable to memorize the relationship between the temperature distribution and the thickness from the viewpoint of quality control. At this time, the two-dimensional temperature image acquired by the thermo camera may be mapped to the three-dimensional shape of the surface of the covering material based on the reference marker or the structure.
Further, when the coating material is applied, the spraying conditions (in the case of a two-component rigid urethane foam, the mixing pressure and the mixing temperature of the two liquids) are continuously acquired, and the spraying conditions are set to the three-dimensional shape of the surface of the coating material. And the thickness of the dressing, in particular, may be stored in association with the dressing image. Since the quality of rigid urethane foam changes greatly depending on the spray conditions, it is preferable in terms of quality control and a detailed database can be constructed by storing the spray conditions before construction together with the three-dimensional data of the heat insulating material.
In addition, the indoor environmental information (temperature, humidity, etc.) at the time of construction is acquired, and the environmental information is stored in association with the three-dimensional shape of the surface of the covering material and the thickness of the covering material, especially the covering material image. May be good.

Next, a second embodiment of the thickness measuring method will be described with reference to the flowchart of FIG. This embodiment is performed without installing a reference marker.
As shown in the flowchart of FIG. 3, a step of acquiring the construction shape (step 1A), a step of calculating a virtual plane (step 2A), and a step of calculating the thickness of the covering material (step 3A). , A step of displaying a covering material image (4A step), a step of determining whether a finishing process is necessary based on the covering material image (5A step), and a finishing process when it is determined that a finishing process is necessary. And a step (seventh step A) of storing the three-dimensional data of the covering material in association with the target surface when it is determined that the finishing process is not necessary.
It should be noted that steps 3A to 7A are substantially the same as steps 4 to 8 of the embodiment of FIG.

1st process A acquires a construction shape. In this embodiment, the construction shape includes the three-dimensional coordinates of the surface of the structure located adjacent to or near the covering material and the target surface. Here, the structure is a structure including a surface parallel to the target surface. The surface of the structure includes a surface parallel to the target surface.
The structure includes, for example, a structure such as a pillar, a sash, a threshold, a peripheral edge, a skirting board, or a beam material located in the same room as the wall surface of the target surface, or a floor, a ceiling, a wall boundary, a pipe, a door, or a window. , An opening such as a ventilation port, and a structure having a characteristic shape of a power distribution box. In addition, in the case of waterproofing the floor surface of the parking lot, a rising portion such as a parapet or a structure such as a pillar can be used as a reference point.
For example, the construction shape 10 in FIG. 4 includes the covering material 12 and the pillar P having the surface S2 parallel to the target surface.

Step 2A calculates a virtual plane. Specifically, the three-dimensional coordinates of arbitrary three points on the plane parallel to the target surface of the structure are acquired and used as the reference three-dimensional coordinates. Here, three points (not shown) are selected from the plane S2 of the pillar P and set as the reference three-dimensional coordinates. It is assumed that the plane S2 has a known distance L from the target surface based on the known dimension of the pillar P. Based on the reference three-dimensional coordinates on S2, a virtual plane S obtained by translating the target surface in the direction perpendicular to the target surface by a predetermined distance is calculated within the construction shape. The dotted line in FIG. 4 is the virtual plane S. That is, in the structure (pillar P), the virtual plane S is calculated within the construction shape by enlarging the surface S2 parallel to the target surface to the same size as the target surface and translating it in the plane direction. .. If the construction shape is represented by a polygon mesh rather than point cloud data, one plane parallel to the target plane should be selected instead of acquiring the three-dimensional reference three-dimensional coordinates. Is the same as selecting three reference three-dimensional coordinates that define the selected surface.

Also in the thickness measuring method of the second embodiment, as in the first embodiment, a virtual plane obtained by translating the target surface in the vertical direction with respect to the target surface by a predetermined distance is calculated within the construction shape. Therefore, it is possible to confirm the total thickness of the covering material with one measurement after the covering material is applied. Similarly to the first embodiment, the method of applying a coating material using this thickness measuring method can provide a coating material of uniform quality, not limited to the skill level of the operator.

Next, a third embodiment of the method for measuring the thickness of the covering material will be described.
In the thickness measuring method in which the first and second embodiments are the thickness measuring methods, the virtual plane is calculated based on the three-dimensional reference coordinates of three or more points whose distances from the target surface are known and equal. These points were not only equidistant points having the same distance from the target surface but also reference points having a known distance from the target surface.
In the present embodiment, three-dimensional coordinates of three or more equidistant points that are equal in distance from the target surface but are unknown and reference three-dimensional coordinates of one or more reference points whose distance from the target surface are known are used. Based on this, a virtual plane is calculated.
A flowchart of this embodiment is shown in FIG. Steps 4B to 8B are substantially the same as steps 4 to 8 in FIG.

In step 1B, set a reference marker on the covering material. The same reference marker as in the first embodiment can be used. However, only one reference marker needs to be installed, and one reference three-dimensional coordinate may be set on the reference marker.

In step 2B, the construction shape is acquired. In this embodiment, the construction shape includes the three-dimensional coordinates of the surface of the structure located adjacent to or in the vicinity of the covering material and the target surface, and the reference three-dimensional coordinates set in the reference marker. Similar to the second embodiment, here, the structure is a structure including a surface parallel to the target surface, and the surface of the structure is the surface parallel to the target surface. The example of the structure is also the same as that of the second embodiment.
For example, the construction shape 10b of FIG. 10 includes a covering material 12, one reference marker 13, and a pillar P having a surface S2 parallel to the target surface.

Calculating a virtual plane in step 3B. Specifically, the three-dimensional coordinates of any three points on the plane parallel to the target plane of the structure are acquired as equidistant points. In FIG. 10, three points (not shown) on the plane S2 of the pillar P are selected as equidistant points. A plane parallel to the target surface is calculated based on the three-dimensional coordinates of equidistant points on S2, and the plane is translated to a position where the reference point on the reference marker 13 is on the plane, and the virtual plane S is Calculate within the construction shape. A virtual plane S is shown by a dotted line in FIG.

Also in the thickness measuring method of the third embodiment, as in the first embodiment, a virtual plane obtained by translating the target surface in the vertical direction by a predetermined distance can be calculated within the construction shape. After the coating material is applied, the total thickness of the coating material can be confirmed with one measurement. Similar to the first embodiment, the method of constructing the covering material using this thickness measuring method can also provide a covering material of uniform quality regardless of the skill level of the operator.

Next, a first embodiment of a system for measuring the thickness of the coating material of the present invention (hereinafter referred to as a thickness measurement system) will be described. The measurement system 20 of FIG. 5 includes a three-dimensional measurement device 21, a control unit 22, a reference marker 23, and a display unit 24. The three-dimensional measuring device 21 measures a construction shape including the three-dimensional shape of the surface of the covering material 12 applied to the target surface. The thickness measuring system 20 can be used in the thickness measuring method of FIG. The reference marker 23 is substantially the same as the reference marker 13 used in the thickness measuring method of FIG.

The three-dimensional measuring device 21 is a three-dimensional scanner including a light emitting unit 21a that emits a laser beam, a light receiving unit 21b that receives the laser beam reflected by the covering material, and a calculation unit (not shown). The three-dimensional measuring device 21 is substantially the same as the three-dimensional measuring device used in the measuring method of FIG. 1, and is not particularly limited as long as it can measure the three-dimensional shape of the surface of the covering material.

The control unit 22 includes a storage unit 26 and a data processing unit 27 that calculates the thickness of the covering material.
The storage unit 26 stores construction shape data including the three-dimensional shape of the surface of the covering material measured by the three-dimensional measuring device 21. The virtual plane data and the thickness data of the covering material calculated by the data processing unit 27 are stored as described later. Then, the three-dimensional data of the surface of the covering material and the thickness data of the covering material, in particular, the covering material image and the target surface are stored in association with each other.
In addition, environmental information such as temperature and humidity at the time of construction, spray conditions (mixing pressure and temperature of two-component rigid urethane foam), and data obtained by measuring the moisture content of the target surface are associated with the coating material image. You may memorize it.
Note that these data are preferably stored as an electronic file that cannot be edited with security set with a password, for example. In particular, it is preferable that the electronic file is a non-falsification proof and a time proof by adding a time stamp. Further, the storage unit 26 itself may be locked with a password or the like so that rewriting except for special authority cannot be performed.
The data stored in the storage unit 26 may be stored in a disk-shaped storage medium such as a CD or DVD or a storage medium such as a USB or a memory card by a person having a special authority set by a password or the like. .. In particular, as the storage medium, a disk-shaped storage medium such as a CD-R or a DVD-R capable of writing data only once, or a storage medium such as a USB or a memory card having a tamper-proof function is preferable.

The data processing unit 27 automatically extracts the reference marker 23 based on the color or shape feature from the construction shape data, or the operator specifies and extracts the reference marker 23, and targets the target surface based on the reference marker 23. Virtual plane data obtained by translating a predetermined distance in parallel to the surface is calculated, and the thickness of the covering material is calculated based on the three-dimensional shape data of the surface of the covering material and the virtual plane data. The virtual plane data is calculated by the same method as the third step of the thickness measuring method of FIG. Also, the thickness of the covering material is calculated by the same method as the fourth step of the thickness measuring method of FIG.
In addition, the data processing unit 27 converts the construction shape data into an image of the surface of the covering material, which is a covering material image in which the distribution of the thickness of the covering material is shown in color or shade. The dressing image is substantially the same as the thickness measuring method of FIG.
Further, the data processing unit 27 specifies the portion of the covering material in which the thickness of the covering material is out of the predetermined range based on the thickness of the covering material. That is, the portion where the covering material is too thick or the portion where the covering material is too thin is automatically indicated. For example, such a poorly constructed part may be displayed in a special color in the covering material image, or only the defective part may be extracted and displayed, or may be blinked. In addition, it is preferable to indicate how much the poorly constructed part deviates from a predetermined range.

The display unit 24 is a two-dimensional liquid crystal monitor that displays the covering material image created by the data processing unit 27.

This measuring system 20 installs the reference marker 23 on the coating material after applying the coating material, and obtains the construction shape including the three-dimensional shape of the coating material and the reference marker 23 to determine the total thickness of the coating material. Since it can be calculated, it is possible to easily identify a poorly constructed part. Moreover, since the confirmation work can be performed at one time, the labor of the operator can be greatly reduced. Further, since it can be displayed as a covering material image on the display unit, the operator can easily and accurately confirm the position of the construction defect at the site.
In addition, since the target surface, the three-dimensional shape of the surface of the covering material, and the thickness of the covering material can be stored in association with each other, that is, the data of the covering material can be stored together by being linked to the target surface. Easy quality control.
In this measurement system 20, data such as the thickness of the covering material is stored in the storage unit 26 of the control unit 22, but the data is stored directly in a storage medium such as a CD, DVD, USB, or memory card. May be good. In particular, by storing data such as CD-R and DVD-R directly on a disk-shaped storage medium that can be written only once, or on a storage medium such as a USB or memory card with a tamper-proof function. The objectivity of the data can be retained. Of course, in addition to directly storing the data, the data once stored in the storage unit 26 may be copied to the storage medium in a non-modifiable state, and then the data in the storage unit 26 may be deleted.

In the thickness measurement system 20, the reference marker 23 was recognized and virtual plane data was calculated based on the reference marker 23. However, the virtual plane data may be calculated based on the surface of the structure located adjacent to or near the target surface without using the reference marker 23 and parallel to the target surface of the structure.
In the second embodiment of the thickness measuring system, the data processing unit 27 automatically extracts the surface of the structure parallel to the target surface from the construction shape data, or the operator specifies and extracts the surface. Based on that surface, virtual plane data in which the target surface is translated by a predetermined distance in the direction perpendicular to the target surface is calculated. The method of calculating the virtual plane is the same as step 2A of the thickness measuring method of FIG.
The other processes are substantially the same as those of the thickness measuring system 20.

As a third embodiment of the thickness measuring system, a projector may be used as the display unit 24 of the measuring system 20. In that case, in the data processing unit 27, the reference marker provided on the covering material is aligned with the reference marker (or the plane of the structure) of the image to be projected, and the thickness is displayed on the covering material. It is preferable to perform projection mapping as described above.
With such a configuration, the operator can identify the position of the poor construction of the covering material from the image projected on the target surface, so that the finishing process can be simplified.

As shown in FIG. 6, the thickness measuring system 20a according to the fourth embodiment includes a three-dimensional measuring device 21, a control unit 22, a reference marker 23, and a glasses-type display 30. Then, on the glasses-type display 30, the surface shape of the covering material is displayed so as to overlap the target surface in the field of view of the user. The three-dimensional measuring device 21 and the control unit 22 including the storage unit 26 and the data processing unit 27 are substantially the same as the thickness measuring system 20 of FIG.

The glasses-type display 30 includes a lens-shaped display unit 31, an image acquisition unit 32, and a display control unit 33.
The lens-shaped display unit 31 is transparent and fixed to the frame of the glasses-type display 30 so as to be positioned in front of the eyes of the user when the glasses-type display 30 is attached to the head of the user.
The image acquisition unit 32 acquires information on the visual field direction of the user's eye via the lens-shaped display unit 31 as image data. For example, a camera fixed to the frame of the glasses-type display 30 near the display unit 31 may be used.

The display control unit 33 has a display storage unit 33a and a display data processing unit 33b (not shown).
The display storage unit 33a stores the image data acquired by the image acquisition unit 32 and the covering material image created by the data processing unit 27. Further, the geometrical relationship between the display unit 31 and the image data is stored. For example, the relationship such as the positional relationship and the size ratio between the display unit 31 that projects the image and the image data acquired by the image acquisition unit 32 is stored.
The display data processing unit 33b compares the image data acquired by the image acquisition unit 32 with the covering material image, and deforms the image so that the reference marker of the image data and the reference marker of the covering material image overlap. And alignment processing. Then, based on the relationship between the display unit 31 and the image data, the coating material image is projected on the display unit 31 so that the coating material image overlaps the coating material in the field of view of the user. Data communication between the display data processing unit 33b and the data processing unit 27 may be wired or wireless. Further, the calculation of the data processing unit 27 may be performed by the display data processing unit 33b, and conversely, the calculation of the display data processing unit 33b may be performed by the data processing unit 27.

With this configuration, the worker can check the position of the defective coating material through the lens by simply wearing the glasses-type display 30, and the finishing process can be further simplified.

In the thickness measurement system 20a according to the fourth embodiment, unlike the thickness measurement system according to the second embodiment, the data processing unit 27 does not use the reference marker to determine the target of the structure from the construction shape. Virtual plane data that is automatically extracted from the plane parallel to the plane, or specified by the operator, and the target plane is translated based on the plane in the vertical direction by a predetermined distance. May be calculated.
Further, in the thickness measuring system 20a according to the fourth embodiment, the display unit 31 may be opaque. In this case, the display unit displays the image captured by the image acquisition unit and the covering material image on the display unit. In this case, the same effect can be obtained.

Further, as another embodiment of the measurement system of the present invention, for example, a wearable display such as a head-mounted display (HMD) may be used instead of the glasses-type display. In this case, the three-dimensional measuring device 21 and the control unit 22 are also built in the HMD.
Examples of such an HMD include "HoloLens (registered trademark)" which is a holographic computer manufactured by Microsoft Corporation. HoloLens® is a so-called mixed reality wearable device that can project computer graphics on top of a real landscape. That is, this three-dimensional measurement system includes various sensors such as a 2D camera (image acquisition unit), a 3D sensor (three-dimensional measurement device), an acceleration sensor (IMU), a CPU (data processing unit and data processing unit for display), and storage. A device (storage unit and display storage unit) and the like are built in the HMD.
In this operation method, a reference marker is installed on the covering material, Hololens (registered trademark) is attached, and the construction shape including the three-dimensional shape of the surface of the covering material after construction is acquired by a three-dimensional measuring device, and the applied coating is performed. The material image is calculated in real time and projected onto the operator's field of view so that the reference marker of the covering material image overlaps the reference marker on the actual covering material.
In this way, the worker can check the construction result of the entire construction site in real time during the construction of the covering material, and can immediately take measures for the defective construction site where the thickness of the covering material is insufficient. it can.

The image in Fig. 7 is an image of the construction shape using a three-dimensional measuring device (Mantis Vision's handy 3D scanner "F6SMART"). This wall surface is a heat insulating material having a shaded portion. In FIG. 7, the reference marker M1 of FIG. 8a is provided in the range of “reference installation surface 1”, and the reference marker M2 of FIG. 8b is provided in the range of “reference installation surface 2”. The heat insulating material was sprayed with the hard urethane foam shown in Table 1.

FIG. 8a is a contour diagram showing how far the three-dimensional shape of the surface of the heat insulating material is away from the virtual plane based on the reference marker M1 provided on the heat insulating material. FIG. 8b is a contour diagram showing how far the three-dimensional shape of the surface of the heat insulating material is away from the virtual plane based on the reference marker M2 provided on the pillar P adjacent to the target surface.
In this way, the thickness and unevenness of the heat insulating material for each virtual plane can be seen at a glance. Then, the worker can perform finishing processing on the basis of this image.
Further, since the state of the heat insulating material can be stored as objective data in this way, it is also optimal as data for quality assurance of the installed heat insulating material.

10, 10a, 10b construction shape; 11 wall; 12 coating material; 13 reference marker; 13a pin; 20, 20a measuring system; 21 three-dimensional measuring device; 21a light emitting section; 21b light receiving section; 22b control section; 23 reference marker; 24 display unit; 26 storage unit; 27 data processing unit; 30 glasses type display; 31 display unit; 32 image acquisition unit; 33 display control unit; 33a display storage unit; 33b display data processing unit; M1 reference marker; M2 reference marker; P pillar; S virtual plane; S1 plane; S2 plane; V1 vertical line

Claims (19)

1. It is a method of measuring the thickness of the covering material applied to the target surface.
   The three-dimensional coordinates of the surface of the covering material, the three-dimensional coordinates of three or more equidistant points having the same distance from the target surface, and the reference three-dimensional of one or more reference points whose distances from the target surface are known. A step of acquiring a construction shape including coordinates,
   It includes a step of calculating the thickness of the covering material based on the three-dimensional coordinates of the surface of the covering material, the three-dimensional coordinates of the equidistant point, and the reference three-dimensional coordinates.
   Method for measuring thickness of coating material.
2. The distance from the target surface of the equidistant point is known, and the equidistant point is also the reference point,
   The method for measuring the thickness of the coating material according to claim 1.
3. It further has a step of calculating a virtual plane based on the acquired three-dimensional coordinates of the equidistant points.
   Calculate the thickness of the covering material based on the virtual plane and the three-dimensional coordinates of the surface of the covering material,
   The method for measuring the thickness of the coating material according to claim 2.
4. The distance from the target surface of the equidistant point is unknown, the reference point is a point different from the equidistant point,
   The method for measuring the thickness of the coating material according to claim 1.
5. Further comprising the step of calculating a virtual plane based on the acquired three-dimensional coordinates of the equidistant points and the reference three-dimensional coordinates,
   Calculate the thickness of the covering material based on the virtual plane and the three-dimensional coordinates of the surface of the covering material,
   The method for measuring the thickness of the coating material according to claim 4.
6. Before the step of acquiring the construction shape, there is a step of installing a reference marker on the coating material or in the vicinity of the coating material,
   The reference three-dimensional coordinates are three-dimensional coordinates on the reference marker,
   The method for measuring the thickness of the coating material according to claim 1.
7. The reference marker has a pin extending in one direction,
   The step of installing the reference marker is a step of inserting the pin into the covering material so that the tip of the pin abuts on the target surface.
   The method for measuring the thickness of the coating material according to claim 6.
8. The equidistant points are points on the surface of a structure adjacent to or in the vicinity of the covering material and the target surface,
   The method for measuring the thickness of the coating material according to claim 1.
9. A step of displaying a covering material image showing a distribution of thickness of the covering material by color or shading;
   The method for measuring the thickness of a coating material according to any one of claims 1 to 8.
10. There is a step of determining the presence or absence of defective construction where the thickness of the covering material is out of a predetermined range,
    The method for measuring the thickness of a covering material according to claim 1.
11. A step of determining the presence or absence of a defective construction where the thickness of the covering material is out of a predetermined range,
    A step of displaying the defective construction portion on the covering material image,
    The method for measuring the thickness of the coating material according to claim 9.
12. A step of storing the thickness of the covering material in association with the target surface,
    The method for measuring the thickness of a coating material according to claim 1.
13. Before applying the coating material, a step of measuring the moisture content of the target surface,
    Storing the moisture content in association with the thickness of the coating material,
    The thickness measuring method according to claim 12.
14. Before applying the covering material, the step of measuring the temperature distribution of the target surface and
    It has a step of storing the temperature distribution in association with the thickness of the coating material.
    The method for measuring the thickness of a coating material according to claim 12 or 13.
15. The coating is a blown urethane foam insulation,
    The method for measuring the thickness of a coating material according to claim 1.
16. A step of acquiring a spraying condition of the covering material,
    Storing the spraying condition in association with the thickness of the covering material,
    The method for measuring the thickness of the covering material according to claim 15.
17. A system for measuring the thickness of the covering material applied to the target surface,
    Three-dimensional measuring device,
    With a data processing unit,
    The three-dimensional measuring device has three-dimensional coordinates of the surface of the covering material, three-dimensional coordinates of three or more equidistant points having the same distance from the target surface, and one or more points where the distance from the target surface is known. Obtain the construction shape including the reference three-dimensional coordinates of the reference point of
    The data processing unit calculates the thickness of the covering material based on the construction shape,
    Coating thickness measurement system.
18. Installed on or near the coating material, further comprising a reference marker that gives the reference three-dimensional coordinates,
    The data processing unit recognizes the reference marker from the construction shape based on color or shape characteristics,
    The thickness measuring system of the coating material according to claim 17.
19. A method of applying a covering material to a target surface,
    A step of applying the covering material on the target surface;
    The three-dimensional coordinates of the surface of the covering material, the three-dimensional coordinates of three or more equidistant points having the same distance from the target surface, and the reference three-dimensional of one or more reference points whose distances from the target surface are known. A step of obtaining coordinates,
    A step of calculating the thickness of the covering material based on the three-dimensional coordinates of the surface of the covering material, the three-dimensional coordinates of the equidistant point, and the reference three-dimensional coordinates.
    And a step of determining the presence or absence of a defective construction where the thickness of the covering material is out of a predetermined range,
    Construction method of covering material.

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