JP2017053084A - Concrete compaction determination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete compaction determination system capable of quantitatively and readily determine whether concrete compaction has been completed, in a non-contact manner with concrete.SOLUTION: A concrete compaction determination system 10 includes: a three-dimensional distance sensor 20 projecting a light beam on an object and acquiring three-dimensional distance data being a set of point group data; a coordinate conversion section (an information processor 30) converting the acquired three-dimensional distance data into point group data based on a three-dimensional orthogonal coordinate; a plane extraction section (the information processor 30) extracting a point group recognized as a plane from the converted point group data; a point group number calculation section (the information processor 30) calculating the number of point groups constituting the extracted plane; a determination section (the information processor 30) determining whether or not the calculated number of point groups is equal to or greater than a threshold value; and a notification section (a display panel) notifying that the concrete compaction has been completed, when the determination section determines that the number of point groups is equal to or greater than the threshold value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a concrete compaction determination system used for determining whether or not concrete compaction is completed.

  In concrete dam construction, the compaction process of dam concrete is very important to ensure the water tightness, durability and strength of the dam body.

  In such a compacting process of dam construction, a hydraulic heavy machine called a vibac in which a vibrator is mounted on a backhoe is used.

  In the case of dam concrete, the compaction time by buy-back is longer than that of general concrete, and it is approximately 40 seconds when judged from the accumulated standard of dam concrete. In this case, the concrete compaction time is determined by visual observation by the operator, and depends largely on empirical factors.

   So far, it has been proposed to evaluate the completion of compaction of dam concrete by quantitatively observing the load on the vibrator and changes in the physical properties of the concrete. This type of compaction evaluation method is described in Patent Document 1 (Japanese Patent Laid-Open No. 9-297015), Patent Document 2 (Japanese Patent Laid-Open No. 2014-218852), and the like.

    Cited Document 1 includes a frame 4 having a substantially square shape in plan view, a transparent acrylic plate 6 having a substantially square shape in plan view disposed on the frame 4, a laser distance measuring device 8 disposed on the acrylic plate 6, and a personal computer 10. An unevenness measuring apparatus 2 configured by (hereinafter also referred to as a personal computer 10) or the like is disclosed.

In the cited document 2, the vibration receiving member 4 that vibrates by the operation of the vibrator 3, the acceleration sensor 5 that measures the vibration generated in the vibration receiving member, and the time change of the vibration obtained by the acceleration sensor are analyzed. A concrete compaction determination system 1 for determining the end timing of the compaction operation by the vibrator 3 using the analysis result is disclosed.
JP-A-9-297015 JP 2014-218852 A

  However, in the invention described in the cited document 1, since the laser distance measuring device 8 is used, there is a problem that the point measurement is performed and the efficiency of measurement over a wide range is poor.

  Moreover, in the invention described in the cited document 2, there is a problem that it is necessary to embed the acceleration sensor in the concrete, so that a simple determination cannot be made, and an influence such as the progress of the construction occurs.

The present invention solves the above-described problems, and a concrete compaction determination system according to the present invention is a concrete compaction determination system that determines whether or not concrete compaction is completed. The three-dimensional distance sensor that obtains three-dimensional distance data that is a set of point cloud data by projecting, and the three-dimensional distance data obtained by the three-dimensional distance sensor into point cloud data based on three-dimensional orthogonal coordinates A coordinate conversion unit for conversion, a plane extraction unit for extracting a point group recognized as a plane from the point group data converted by the coordinate conversion unit, and a point group constituting the plane extracted by the plane extraction unit A point cloud number calculation unit for calculating the number of point groups, a determination unit for determining whether or not the number of point groups calculated by the point cloud number calculation unit is greater than or equal to a threshold, and the number of point groups in the determination unit is a threshold When it is over Characterized in that it has a notification unit for notifying that the compaction of REITs is complete, the.

  According to the concrete compaction determination system according to the present invention, it is possible to quantitatively and easily determine whether or not the compaction of the concrete has been completed without contact with the concrete without depending on the experience and skill level of the operator. It becomes possible to contribute to the efficient progress of concrete dam construction.

  Further, according to the concrete compaction judgment system according to the present invention, judgment based on quantitative data is performed, so that the judgment result of the concrete compaction judgment system can be used as evidence for construction quality control of a concrete dam.

It is a figure which shows typically the structure of the concrete compaction determination system 10 which concerns on embodiment of this invention. It is a figure which illustrates typically the effect by compaction of concrete by buyback. It is a figure which shows the display panel 40 provided in the cockpit 7 of the buyback 1. FIG. It is a figure which shows the flowchart of the determination process of the concrete compaction determination system 10 which concerns on embodiment of this invention. It is a figure explaining the example of judgment by concrete compaction judgment system 10 concerning an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a configuration of a concrete compaction determination system 10 according to an embodiment of the present invention.

  In the present embodiment, the concrete compaction determination system 10 is provided in the vibe 1 on which the vibrator 3 is mounted in order to determine whether or not the dam concrete compaction process has been completed in the construction of the concrete dam. It is assumed that

  Dam concrete has a maximum coarse aggregate of 150 mm and a small slump. For this reason, the work is carried out with a compacting heavy machine equipped with a large vibrator 3 called the Viback 1 as described above.

  FIG. 2 is a diagram for schematically explaining the effect of concrete compaction by the buyback 1. FIG. 2 (A) shows immediately after the concrete is placed, and FIG. 2 (B) shows the concrete after the concrete is compacted on the buyback 1. The dam concrete has a maximum coarse aggregate of 150 mm. Immediately after driving, the dam concrete is raised in a mountain shape as shown in FIG. 2 (A), and the coarse aggregate comes out on the surface and is uneven. On the other hand, as shown in FIG. 2 (B), by applying vibration by the vibrator 3 of the vibe 1, the unevenness is eliminated and becomes horizontal, and the coarse aggregate that protrudes to the concrete surface sinks. .

  Thus, when the compaction of the dam concrete is completed, the surface shows a smooth horizontal surface. By utilizing this fact, in the concrete compaction determination system 10 according to the present invention, the smoothness of the concrete placement surface is measured by the three-dimensional distance sensor 20, and when the surface becomes smooth, the compaction is completed. judge.

  The concrete compaction determination system 10 according to the present invention mainly includes a three-dimensional distance sensor 20, an information processing device 30 that receives data acquired by the three-dimensional distance sensor 20, and executes data processing, and an information processing device 30. The display panel 40 displays the data processing result according to the above and notifies the operator.

  In FIG. 1, a three-dimensional distance sensor 20 constituting the concrete compaction determination system 10 projects a large amount of three-dimensional distance data (hereinafter referred to as “point cloud”) by projecting laser or infrared rays onto a subject from a sensing opening 25 of a sensor housing 21. It is also a sensor that can measure data.

  Since the point cloud data has a large number of points expressing a three-dimensional distance, it can also be called a distance image. By converting the point cloud data into a three-dimensional orthogonal coordinate system from the height or turning angle at which the three-dimensional distance sensor 20 is installed, the data can be handled in X, Y, and Z coordinates.

  As the three-dimensional distance sensor 20 as described above, for example, a motion capture device “Xtion PRO” for developers made by ASUSTeK Computer or “Kinect” made by Microsoft can be used. These three-dimensional distance sensors 20 acquire three-dimensional distance data at a relatively short distance (about 2 m). For this reason, when these three-dimensional distance sensors 20 are used, the attachment rod 8 is extended from the vicinity of the arm of the bike back 1, and the three-dimensional distance sensor 20 is attached to this end portion.

  On the other hand, when a three-dimensional camera capable of acquiring relatively long-distance three-dimensional distance data is used as the three-dimensional distance sensor 20, the three-dimensional distance sensor 20 is provided in the vicinity of the cockpit 7. be able to.

  The three-dimensional distance data acquired by the three-dimensional distance sensor 20 is input to the information processing device 30 and data processing is performed. As the information processing apparatus 30, a general-purpose personal computer having an input / output function, a calculation function, a data storage function, a data communication function, and the like can be used. However, other information processing apparatuses 30 such as a tablet terminal can also be used. it can.

  The data processing result by the information processing apparatus 30 can be transmitted to the display panel 40 provided in the cockpit 7 by wireless communication or the like. FIG. 3 is a view showing a display panel 40 provided in the cockpit 7 of the buyback 1. The display panel 40 receives the data processing result by the information processing apparatus 30, displays it, and notifies the operator.

  The “coordinate conversion unit”, “point cloud number calculation unit”, and “determination unit” described in the claims indicate the functions of the information processing apparatus 30 in a high-level concept.

  In addition, the “notification unit” described in the claims is a high-level conception of the display panel 40. In this embodiment, visual notification is performed using the display panel 40 as the “notification unit”. However, the “notification unit” may be configured to perform auditory notification using a speaker, for example. Good.

Next, the concrete compaction determination algorithm by the concrete compaction determination system 10 according to the present invention configured as described above will be described. FIG. 4 is a diagram showing a flowchart of the determination process of the concrete compaction determination system 10 according to the embodiment of the present invention.

  In FIG. 4, when the determination process is started in step S <b> 100, subsequently, in step S <b> 101, three-dimensional distance data that is a set of point cloud data is acquired by the three-dimensional distance sensor 20, and Forward.

  In the next step S102, the information processing apparatus 30 converts the three-dimensional distance data transferred from the three-dimensional distance sensor 20 into point cloud data based on the three-dimensional orthogonal coordinates.

  Subsequently, in step S103, a point group recognized as a plane is extracted from the point group data based on the three-dimensional orthogonal coordinates.

  In step S104, the number of point groups constituting the plane is calculated, and in step S105, it is determined whether or not the number of point groups is greater than or equal to a threshold value.

  If the decision result in the step S105 is NO, the process returns to the step S101 so as to reacquire the three-dimensional distance data by the three-dimensional distance sensor 20.

  On the other hand, if the decision result in the step S105 is YES, it is judged that the recognized plane has sufficient smoothness and the compaction of the concrete has been completed, and the process proceeds to a step S106 where the concrete panel is tightened by the display panel 40. Notify that the hardening is complete.

  In step S107, the determination process ends.

  FIG. 5 is a diagram illustrating a determination example by the concrete compaction determination system 10 according to the embodiment of the present invention.

  FIG. 5A shows the three-dimensional distance data acquired when the vibrator 3 of the vibrator 1 starts vibration, and FIG. 5B shows the three-dimensional distance data acquired 10 seconds after the vibration. FIG. 5C shows three-dimensional distance data acquired after 20 seconds of vibration, FIG. 5D shows three-dimensional distance data acquired after 30 seconds of vibration, and FIG. FIG. 5F shows the three-dimensional distance data acquired when it is determined that the compaction has been completed.

  In FIG. 5, the point group which comprises a plane is displayed in red. Moreover, in FIG. 5, it is yellow, light blue, blue, and colorless and transparent as it leaves | separates from the said plane.

  As shown in FIG. 5, it can be seen that when the start time of the vibration of the vibrator 1 by the vibrator 3 has elapsed, the surface gradually becomes flat, and the region (red region) determined to be a flat surface spreads. In the concrete compaction determination system 10 according to the present invention, if the ratio of the same area reaches a certain extent or more, that is, if the number of point groups constituting the plane is equal to or greater than a threshold value, compaction is completed. Judgment is made.

  According to the concrete compaction determination system 10 according to the present invention as described above, whether or not concrete compaction is completed is determined without contact with concrete without depending on the experience and skill level of the operator. Can be determined easily and easily, and can contribute to efficient progress of concrete dam construction.

In addition, according to the concrete compaction determination system 10 according to the present invention, determination based on quantitative data is performed, and therefore the determination result of the concrete compaction determination system 10 can be used as evidence for construction quality control of a concrete dam.

  Furthermore, according to the concrete compaction determination system 10 according to the present invention, by using the three-dimensional distance sensor 20, it is possible to perform concrete placement management equivalent to visual observation by an expert.

  Moreover, according to the concrete compaction determination system 10 according to the present invention, it is possible to easily measure without contact, and therefore, there is a merit that the work can be efficiently progressed. According to the concrete compaction determination system 10 according to the present invention, since it can be quantitatively determined, it does not depend on the skill level of the operator.

  Furthermore, the position information is acquired by using GPS or the like, and in conjunction with this, the data by the concrete compaction determination system 10 according to the present invention is managed, thereby greatly contributing to the computerization of concrete placement management. Will be able to.

DESCRIPTION OF SYMBOLS 1 ... Buyback 3 ... Vibrator 7 ... Cockpit 8 ... Mounting rod 10 ... Concrete compaction determination system 20 ... Three-dimensional distance sensor 21 ... Sensor housing 25 ... Sensing opening 30 ... information processing device 40 ... display panel

Claims (1)

In a concrete compaction judgment system for judging whether or not concrete compaction is completed,
A three-dimensional distance sensor that projects light rays onto an object and acquires three-dimensional distance data that is a set of point cloud data;
A coordinate conversion unit that converts the three-dimensional distance data acquired by the three-dimensional distance sensor into point cloud data based on three-dimensional orthogonal coordinates;
A plane extraction unit that extracts a point group recognized as a plane from the point group data converted by the coordinate conversion unit;
A point cloud number calculation unit for calculating the number of point clouds of the point cloud constituting the plane extracted by the plane extraction unit;
A determination unit that determines whether or not the number of point groups calculated by the point group number calculation unit is greater than or equal to a threshold;
An informing unit for informing that the compaction of the concrete is completed when the number of point groups is equal to or greater than a threshold value in the determination unit;
A concrete compaction judgment system characterized by comprising: