Mortar fluidity test system

Abstract

To perform measurement of spread mortar and calculation and recording of a flow value efficiently, and to reliably calculate a correct flow value.SOLUTION: In a mortar fluidity test system 1, a surface shape of a flow table 21 and a surface shape of a spread mortar M are scanned by a 3D scanner 4 and point group data of a sensor coordinate system is acquired, it is converted into point group data of a reference coordinate system SC, the point group data of the surface shape of the mortar M is extracted, and mortar contour specifying point group data is acquired for specifying the contour of the mortar, the length of a long diameter LD defined by two contour points where a distance between points becomes maximum and the length of a short diameter SD defined by two intersection points in which the distance is maximum out of two intersection points of the contour line and the orthogonal line of the long diameter LD are calculated, a first average value of the length of the long diameter LD and the length of the short diameter SD is calculated, a second average value between the length of the long diameter LD and the length of the short diameter SD based on another mortar M is calculated, and a flow value which is the average value between the first average value and the second average value is calculated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mortar fluidity testing system used for testing the fluidity of mortar injected as a fixing material in, for example, rock bolt construction or anchor construction. [Background technology]

[0002] Conventionally, in rock bolt and ground anchor construction, the use of the table flow test of JIS R5201 (physical testing method for cement) has been stipulated as a routine control item as a method for controlling the softness and fluidity of mortar injected as an anchoring material. In this table flow test, as shown in Fig. 7, a flow cone 102 having a substantially truncated cone shape is placed on a flow table 101 of a table flow tester 100, and mixed unhardened mortar is poured into the flow cone 102 in two batches, and the unhardened mortar is poked with a poker rod 15 times over its entire surface in each of the first and second batches, after which the flow cone 102 is removed.

[0003] Then, the handle 103 of the table flow tester 100 is turned, and the mortar M remaining on the flow table 101 is subjected to a falling motion 15 times in 15 seconds by the rotation / up / down motion conversion mechanism of the operating rod 104 and cam 105 of the flow table 101, and the major axis of the spread mortar M that is recognized as the maximum diameter and the minor axis in the direction perpendicular to the major axis are measured with the measuring scale 106, and the average value of the major axis and minor axis is calculated as the flow value, and a photograph of the mortar M on the flow table 101 is taken, and the flow value and the photograph are recorded. Furthermore, it is stipulated in JIS R5201 that these operations should be repeated twice from the beginning.

[0004] As another test method, Patent Document 1 discloses a method in which a flow cone is placed in the center of a base plate placed on the floor at the work site, polymer cement mortar is filled into the flow cone, the flow cone is lifted up, a transparent, flat pressure plate is placed on the mortar test specimen, a weight is placed in the center of the pressure plate, the maximum flow length of the mortar test specimen deformed by the weight of the pressure plate and the weight and the flow length at a right angle to the maximum flow length are measured, and the average length of these lengths is calculated. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2022-30043 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, when injecting mortar on-site, workers on-site must carry out the table flow test to measure the spread mortar M, calculate and record the flow value, and check whether the calculated flow value meets the standard value required for the mortar to be poured before injecting the mortar. This increases the waiting time of workers on-site, making construction work inefficient. In addition, because workers on-site must measure, calculate, and record while being urged to carry out the table flow test, errors in the calculation of the flow value are likely to occur.

[0007] The present invention has been proposed in consideration of the above problems, and aims to provide a mortar fluidity testing system that can efficiently measure spread mortar, calculate and record flow values ​​when performing a table flow test of mortar, and can reliably calculate accurate flow values. [Means for solving the problem]

[0008] The mortar fluidity testing system of the present invention includes a table flow testing device, a 3D scanner that acquires point cloud data of the surface shape of the flow table of the table flow testing device and the surface shape of the mortar spread on the flow table in three-dimensional coordinates of a sensor coordinate system, a coordinate conversion unit that converts the point cloud data of the three-dimensional coordinates of the sensor coordinate system into point cloud data of three-dimensional coordinates of a reference coordinate system, a mortar point cloud data extraction unit that extracts point cloud data of the surface shape of the mortar based on height information or data similarity from the point cloud data of the three-dimensional coordinates of the reference coordinate system, and a mortar contour identification point that identifies the contour of the mortar as viewed from directly above the flow table from the point cloud data of the surface shape of the mortar. the mortar contour identifying point cloud data acquisition unit acquiring group data; a major axis calculation unit defining a major axis at the two contour points at which the distance between the two contour points in the mortar contour identifying point cloud data is greatest, and a minor axis at the two intersection points at which the distance is greatest among the two intersection points between the contour line configured by the mortar contour identifying point cloud data and the perpendicular line to the major axis, and calculating the lengths of the major axis and the minor axis; a flow value calculation unit calculating a first average value of the lengths of the major axis and the minor axis, calculating a second average value of the lengths of the major axis and the minor axis based on another mortar, and calculating a flow value which is the average value of the first average value and the second average value; and a test data recording unit storing the flow value. According to this, the tester can measure the spread mortar, calculate and record the flow value by simply scanning the mortar spread on the flow table with a 3D scanner, so that the spread mortar can be measured, and the flow value can be calculated and recorded efficiently when performing a table flow test of mortar. In addition, it is no longer necessary for the tester to determine the major axis and minor axis of the spread mortar based on his experience and measure them with a measuring scale, and the spread mortar can be measured, and the flow value can be calculated and recorded automatically, so that an accurate flow value can be calculated reliably regardless of the tester's experience. In addition, the surface shape and outline of the mortar can be identified based on the height information or data similarity of the flow table, so that the outline of the mortar on the flow table can be identified accurately and stably without being affected by the color of the flow table, etc.

[0009] The mortar fluidity testing system of the present invention is characterized in that it has an input section into which test management information including information on the test location is input, and the test management information and the flow value are stored in the test data recording section in correspondence with each other. This allows the reliability of test data to be improved by recording the input test management information and the calculated flow value in correspondence with each other. Furthermore, it also makes it more efficient for the site manager to document the test data in the office.

[0010] The mortar fluidity testing system of the present invention is characterized in that the 3D scanner, a display unit capable of displaying the test management information and the flow value in correspondence with each other, the coordinate conversion unit, the mortar point cloud data extraction unit, the contour identification point cloud data acquisition unit, the long diameter / short diameter calculation unit, the flow value calculation unit, the test data recording unit, and the input unit are all implemented as an integrated unit on a portable tablet. According to this, a tester can conduct mortar fluidity tests simply by preparing a table flow tester and a portable tablet, which not only increases the ease and convenience of conducting tests but also diversifies the locations where fluidity tests can be conducted. Effect of the Invention

[0011] According to the mortar fluidity testing system of the present invention, when performing a table flow test of mortar, it is possible to efficiently measure the spread mortar, calculate and record the flow value, and reliably calculate an accurate flow value. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a block diagram showing the overall configuration of a mortar fluidity test system according to an embodiment of the present invention. [Diagram 2] 1A and 1B are perspective explanatory views of a table flow tester in a mortar fluidity test system according to an embodiment. [Diagram 3]4 is a flowchart showing a test process performed by the mortar fluidity test system of the embodiment. [Figure 4] FIG. 2 is an explanatory diagram showing an example of a test management information input screen in the mortar fluidity test system of the embodiment. [Diagram 5] FIG. 2 is a perspective explanatory view illustrating scanning by a 3D scanner and a reference coordinate system in the mortar fluidity test system of the embodiment. [Figure 6] FIG. 2 is an explanatory diagram showing an example of the major axis and minor axis of mortar on a flow table in the mortar fluidity test system of the embodiment. [Figure 7] 1A and 1B are perspective explanatory views for explaining the calculation of a flow value using a conventional table flow tester. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] [Mortar fluidity test system according to an embodiment] As shown in Figures 1 and 2, a mortar fluidity test system 1 according to an embodiment of the present invention is composed of a table flow tester 2 used in performing a table flow test of JIS R5201 (physical test method for cement), a mobile tablet 3, and a 3D scanner 4. The table flow tester 2 includes a disk-shaped flow table 21, an operating rod 22 protruding downward from approximately the center of the flow table 21, a handle 23, and a cam 24. By rotating the cam 24 by rotating the handle 23, the operating rod 22, the lower end of which abuts against the cam 24, and the flow table 21 fixed to the operating rod 22 are moved up and down. That is, the cam 24 and the operating rod 22 constitute a rotation-up and down movement conversion mechanism.

[0014] On the flow table 21, a flow cone 25 having a generally truncated cone shape with an inner diameter gradually expanding downward is placed, and mixed unhardened mortar is poured into the flow cone 25 placed on the flow table 21 from the upper opening, and the upper surface of the unhardened mortar is compressed by poking the entire surface with a poking rod 26 15 times each. After the flow cone 25 is removed, the handle 23 is turned to move the flow table 21 up and down, and the mortar M remaining on the flow table 21 is subjected to a falling motion 15 times in 15 seconds, spreading the mortar M, and the mortar M spread on the flow table 21 is scanned from above by the 3D scanner 4 described later. Two sets of operations are performed in which mixed unhardened mortar is poured into the flow cone 25, the mortar M is spread, and the mortar M is scanned by the 3D scanner 4.

[0015] The mobile tablet 3 includes a control unit 31 such as a CPU, a storage unit 32 including a ROM, a RAM, a flash memory, an input unit 33 such as a touch panel, a display unit 34 such as a touch panel that also serves as the input unit 33, a built-in timer 35, and a communication interface 36. The storage unit 32 includes a control program storage unit 321 that stores a control program for controlling the mobile tablet 3 in cooperation with the control unit 31, a flow table environment data storage unit 322 that stores flow table environment data used when converting point cloud data of three-dimensional coordinates in a sensor coordinate system having the 3D scanner 4 as the origin into point cloud data of three-dimensional coordinates in a reference coordinate system SC corresponding to the flow table coordinate system, a test processing reference data storage unit 323 that stores data referenced when the control unit 31 executes a mortar fluidity test process, and a test data recording unit 324 that stores test management information and flow values ​​by corresponding the test management information and the flow values.

[0016] The 3D scanner 4 in this example used as a sensor is a three-dimensional laser scanner that can rotate around the center of the sensor, irradiates laser light, receives the reflected light reflected by the object and returns, and measures the distance to the object by the time it takes to receive the reflected light. The 3D scanner 4 acquires point cloud data based on the three-dimensional coordinates of the sensor coordinate system of the surface shape of the flow table 21 of the table flow tester 2 and the surface shape of the mortar M spread on the flow table 21 while rotating to change the direction of the light emitting unit 41 and the light receiving unit 42 (see FIG. 5). The 3D scanner 4 outputs the acquired point cloud data to the mobile tablet 3 via the communication interface 36.

[0017] The control unit 31 executes a predetermined process in cooperation with a predetermined test process control program in the control program storage unit 321. The control unit 31 recognizes point cloud data in three-dimensional coordinates of the sensor coordinate system of the surface shape of the flow table 21 of the table flow tester 2 and the surface shape of the mortar M spread on the flow table 21 input from the 3D scanner 4, compares the recognized point cloud data with the environmental data of the flow table in the flow table environmental data storage unit 322, and functions as a coordinate conversion unit 311 that converts the recognized point cloud data of the three-dimensional coordinates of the sensor coordinate system into point cloud data of three-dimensional coordinates of the reference coordinate system SC corresponding to the flow table coordinate system (see FIG. 1 and FIG. 5). It is preferable to execute these processes using Lidar SLAM technology.

[0018] Furthermore, the control unit 31 functions as a mortar point cloud data extraction unit 312 that extracts point cloud data of the surface shape of the mortar M from the point cloud data of the three-dimensional coordinates of the reference coordinate system SC based on height information or data similarity. The mortar point cloud data extraction unit 312 executes a process of comparing, for example, a z value representing height in the three-dimensional coordinates (x, y, z) of the reference coordinate system SC with a threshold value of the z value of the reference coordinate system SC stored in the test processing reference data storage unit 323, and extracting point cloud data of the surface shape of the mortar M that exceeds the threshold value. Alternatively, the mortar point cloud data extraction unit 312 executes a process of extracting point cloud data of the surface shape of the mortar M by classifying the point cloud data according to the similarity of the z value representing height in the point cloud data of the three-dimensional coordinates (x, y, z) of the reference coordinate system SC using, for example, machine learning cluster analysis.

[0019] The control unit 31 functions as a contour identification point cloud data acquisition unit 313 that acquires mortar contour identification point cloud data that identifies the contour of the mortar M as viewed from directly above the flow table 21 from the point cloud data of the extracted surface shape of the mortar M. The acquired mortar contour identification point cloud data that identifies the contour of the mortar M may be set to zero in the z value of the point cloud data of the extracted surface shape of the mortar M represented by the three-dimensional coordinates (x, y, z) of the reference coordinate system SC, or may be set to two-dimensional coordinates (x, y) from which the z value of the point cloud data of the extracted surface shape of the mortar M represented by the three-dimensional coordinates (x, y, z) of the reference coordinate system SC has been deleted.

[0020] The control unit 31 uses the x and y coordinates of each mortar contour specific point cloud data to calculate two contour points that have the maximum distance between them, and defines the major axis using these two contour points. It also defines the minor axis SD using the two intersection points between the contour line MB composed of the mortar contour specific point cloud data and the perpendicular line to the major axis LD that have the maximum distance between them, and functions as a major axis and minor axis calculation unit 314 that calculates the length of the major axis LD and the length of the minor axis SD (see Figure 6).

[0021] The control unit 31 functions as a flow value calculation unit 315 that calculates a first average value from the length of the first major diameter LD and the length of the first minor diameter SD calculated from the mortar M spread for the first time in the table flow tester 2, calculates a second average value from the length of the second major diameter LD and the length of the second minor diameter SD calculated from the mortar M spread for the second time in the table flow tester 2, and calculates the flow value of mortar M, which is the average of the first and second average values.

[0022] Furthermore, test management information including information on the test location is input to the portable tablet 3 from the input unit 33. Then, the record storage processing unit 316 of the control unit 31 associates the input test management information with the calculated flow value, obtains the recording date and time of the calculated flow value from the built-in timer 35, and stores the recorded date and time, the test management information, and the calculated flow value in the test data recording unit 324 in a format in which the recording date and time are associated with each other.

[0023] When conducting a test with the mortar fluidity test system 1 of this embodiment, as shown in Fig. 3, the tester inputs test management information including information on the test site into the input unit 33 of the mobile tablet 3, and the input test management information is stored in the test data recording unit 324 (S1). Fig. 4 is an example of an input screen for test management information on the mobile tablet 3, and information such as the test number, the site name and location corresponding to the information on the test site, and the builder is input through the input unit 33. In addition, the tester uses the table flow tester 2 to prepare mortar M in a state spread on the flow table 21 as a sample for the first test (S2).

[0024] Then, while rotating the 3D scanner 4, the surface shape of the flow table 21 of the table flow tester 2 and the surface shape of the mortar M spread on the flow table 21 are scanned (S3), and point cloud data is obtained in three-dimensional coordinates in the sensor coordinate system of the surface shape of the flow table 21 of the table flow tester 2 and the surface shape of the mortar M spread on the flow table 21 (S4).

[0025] The coordinate conversion unit 311 of the control unit 31 converts the three-dimensional coordinate point cloud data of the sensor coordinate system input from the 3D scanner 4 into three-dimensional coordinate point cloud data of the reference coordinate system SC corresponding to the flow table coordinate system (S5), and the mortar point cloud data extraction unit 312 extracts point cloud data of the surface shape of the mortar M based on height information or data similarity from the point cloud data of the three-dimensional coordinates of the reference coordinate system SC (S6). Furthermore, the contour identification point cloud data acquisition unit 313 acquires mortar contour identification point cloud data that identifies the contour of the mortar M as viewed from directly above the flow table 21 from the extracted point cloud data of the surface shape of the mortar M (S7).

[0026] The major axis / minor axis calculation unit 314 calculates two contour points that are the maximum distance between the mortar contour specific point cloud data using the x and y coordinates of each mortar contour specific point cloud data, defines the major axis with these two contour points, and defines the minor axis SD with the two intersection points that are the maximum distance among the two intersection points between the contour line MB composed of the mortar contour specific point cloud data and the orthogonal line of the major axis LD, and calculates the lengths of the major axis LD and the minor axis SD (S8). The flow value calculation unit 315 calculates a first average value from the lengths of the first major axis LD and the first minor axis SD (S9).

[0027] Furthermore, if the above test is the first test, the tester prepares mortar M in a spread state on the flow table 21 as a sample for the second test using the table flow tester 2 (S10, S2). Then, the processes of S3 to S9 are repeated, and the flow value calculation unit 315 calculates a second average value from the length of the second major diameter LD and the length of the second minor diameter SD (S9).

[0028] The flow value calculation unit 315 calculates the flow value of the mortar M, which is the average value obtained by averaging the first average value of the length of the first major diameter LD and the length of the first minor diameter SD and the second average value of the length of the second major diameter LD and the length of the second minor diameter SD, in response to the calculation of the second average value or in response to a calculation command input from the input unit 33 (S11).

[0029] In response to a recording command input from the input unit 33, the record storage processing unit 316 of the portable tablet 3 obtains the recording date and time of the calculated flow value from the built-in timer 35, and stores it in the test data recording unit 324 in a format that corresponds the recording date and time, the test management information, and the calculated flow value (S12).

[0030] According to the mortar fluidity test system 1 of this embodiment, the tester simply scans the mortar M spread on the flow table 21 with the 3D scanner 4, and the measurement of the spread mortar M, the calculation and recording of the flow value are performed. Therefore, when performing a table flow test of the mortar M, the measurement of the spread mortar M, the calculation and recording of the flow value can be efficiently performed. In addition, it is no longer necessary to determine the long diameter LD and the short diameter SD of the spread mortar M based on the tester's experience and measure them with a measuring scale. Since the measurement of the spread mortar M, the calculation and recording of the flow value are performed automatically, an accurate flow value can be reliably calculated regardless of the tester's experience. In addition, since the surface shape and the outline of the mortar M can be specified based on the height information or data similarity of the flow table 21, the outline of the mortar M on the flow table 21 can be specified accurately and stably without being affected by the color of the flow table 21.

[0031] In addition, by recording the input test management information and the calculated flow value in correspondence with each other, the reliability of the test data can be improved. Furthermore, the work of the site manager in the office to document the test data can be made more efficient.

[0032] [Scope of the invention disclosed herein] The inventions disclosed in this specification include, in addition to the inventions and embodiments listed as inventions, those specified by changing partial contents of these to other contents disclosed in this specification, those specified by adding other contents disclosed in this specification to these contents, or those specified by deleting partial contents of these to the extent that partial effects can be obtained, and specifying them as a higher-level concept. The inventions disclosed in this specification also include the following contents and modifications.

[0033] For example, in the mortar fluidity test system 1 of the above embodiment, the 3D scanner 4 is configured to be communicatively connected to the mobile tablet 3, but it is also suitable to have the 3D scanner integrated into the mobile tablet. By integrating the 3D scanner into the mobile tablet, the tester can perform a mortar fluidity test by simply preparing a table flow tester and a mobile tablet, which increases the ease and convenience of performing the test and diversifies the locations where the fluidity test can be performed. In addition, it is also possible to configure the mortar fluidity test system using a personal computer such as a mobile PC instead of the mobile tablet 3 in the above embodiment. [Industrial Applicability]

[0034] The present invention can be used, for example, when conducting a fluidity test of mortar to be injected as a fixing material in rock bolt construction or anchor construction. [Explanation of symbols]

[0035] 1...Mortar fluidity test system 2...Table flow tester 21...Flow table 22...Operating rod 23...Handle 24...Cam 25...Flow cone 26...Push rod 3...Portable tablet 31...Control unit 311...Coordinate conversion unit 312...Mortar point cloud data extraction unit 313...Contour specific point cloud data acquisition unit 314...Major axis and minor axis calculation unit 315...Flow value calculation unit 316...Record storage processing unit 32...Memory unit 321...Control program storage unit 322...Flow table environmental data storage unit 323...Reference data storage unit for test processing 324...Test data recording unit 33...Input unit 34...Display unit 35...Built-in timer 36...Communication interface 4...3D scanner 41...Light emission unit 42...Light receiving unit M...Mortar SC...Reference coordinate system LD...Major axis SD...Minor axis MB...Contour line 100...Table flow tester 101...flow table 102...flow cone 103...handle 104...operating rod 105...cam 106...measuring scale

Claims

1. A table flow tester; A 3D scanner that acquires point cloud data based on three-dimensional coordinates in a sensor coordinate system of the surface shape of the flow table of the table flow tester and the surface shape of the mortar spread on the flow table; a coordinate conversion unit that converts the point cloud data of the three-dimensional coordinates in the sensor coordinate system into point cloud data of the three-dimensional coordinates in a reference coordinate system; a mortar point cloud data extraction unit that extracts point cloud data of a surface shape of the mortar from the point cloud data of the three-dimensional coordinates of the reference coordinate system based on height information or data similarity; a contour specifying point cloud data acquiring unit that acquires mortar contour specifying point cloud data that specifies the contour of the mortar as viewed from directly above the flow table from the point cloud data of the surface shape of the mortar; a major axis calculation unit that defines a major axis by two contour points that have a maximum distance between them in the mortar contour identifying point cloud data, and defines a minor axis by two intersection points that have a maximum distance between them among two intersection points between a contour line formed by the mortar contour identifying point cloud data and an orthogonal line to the major axis, and calculates the length of the major axis and the length of the minor axis; a flow value calculation unit that calculates a first average value of the major axis length and the minor axis length, calculates a second average value of the major axis length and the minor axis length based on another mortar, and calculates a flow value that is an average value of the first average value and the second average value; and a test data recording unit for storing the flow value.

2. An input unit for inputting test management information including information on a test site, 2. The mortar fluidity testing system according to claim 1, wherein the test management information and the flow value are stored in the test data recording section in association with each other.

3. The mortar fluidity test system according to claim 2, characterized in that the 3D scanner, the display unit capable of displaying the test management information and the flow value in correspondence with each other, the coordinate conversion unit, the mortar point cloud data extraction unit, the contour specific point cloud data acquisition unit, the major axis / minor axis calculation unit, the flow value calculation unit, the test data recording unit, and the input unit are integrated into a mobile tablet.

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