JP6598524B2 - Method and apparatus for measuring concrete-containing substances - Google Patents

Description

  The present invention relates to a measuring method and a measuring device for concrete-containing substances. More specifically, the present invention relates to a technique suitable for use in the measurement of a substance in a concrete core sample collected through a concrete structure, for example.

  As a conventional method for measuring the concentration of contained substances in a cylindrical sample taken through a concrete structure, a cylindrical sample cut from the concrete structure is cut in half along the axis, and the cut section is obtained by the cutting. A laser beam is irradiated to ablate concrete-containing material, and then the light emitted from the material ablated by the ablation is decomposed for each wavelength while white light noise is reduced and excited atoms remain. There is an apparatus that obtains an emission spectrum by imaging with an element and measures the concentration of a concrete-containing substance from the emission spectrum (Patent Document 1).

JP 2009-068969 A

  However, in the concrete-containing material measuring method of Patent Document 1, a cylindrical sample (also referred to as a core) cut from a concrete structure is cut in half along the axial center, and then laser light is irradiated onto the split section. Since the concrete-containing substance is measured by the light emission intensity at the time, the core cut out from the concrete structure cannot be used as a sample for other tests such as a compressive strength test. For this reason, there exists a problem that sufficient effective utilization of the core taken out from the actual structure will be inhibited.

  In the concrete-containing substance measuring method of Patent Document 1, since the measurement is performed after the core is cut in half along the axis, a machine for cutting the core is required. For this reason, there is a problem that additional labor is required for bringing in and preparing the machine, particularly in the case of measurement of an actual structure on site.

  In the concrete-containing substance measuring method of Patent Document 1, since the measurement is performed on the split section when the core is cut in half along the axis, it is ensured for the size of the core taken out. It cannot be said that the measurement area is large, and a core having a diameter of 100 mm is usually cut to ensure a predetermined measurement accuracy. However, since the diameter of the core is large, the places where the core can be cut and taken out are limited, and as a result, the places that are not evaluated remain in the structure, for example, for the soundness evaluation of the actual structure There is a problem that the measurement may not be perfect.

  Therefore, the present invention can reduce the labor related to measurement, can effectively use the sample taken out from the actual structure, and can contain the concrete that can reduce the diameter of the sample taken out from the actual structure. It aims at providing the measuring method and measuring device of a substance.

In order to achieve such an object, the method for measuring a concrete-containing material according to the present invention is a method in which a laser beam whose irradiation position is fixed is irradiated on a surface of a cylindrical concrete specimen penetrated from a concrete structure. When measurement according to breakdown spectroscopy is performed, a pair of holding parts are fitted to both ends in the axial direction of the concrete specimen, and each of the pair of holding parts is coaxial with the axis of the concrete specimen. A pair of arranged slide shafts are attached, and the slide shaft is rotated and moved in the axial direction so that the concrete specimen is moved in the axial direction while being rotated along with the slide shaft. Yes.

In addition, the concrete-containing material measuring apparatus according to the present invention includes a holding portion that is fitted as a pair to each of both end portions in the axial direction of a columnar concrete specimen perforated from a concrete structure, and a concrete specimen. A slide shaft that is arranged coaxially with the shaft center of each of the holding portions and is attached to each of the holding portions as a pair, and an axis operation mechanism that rotates the slide shaft and moves it in the axial direction. When the surface of the concrete specimen is irradiated with the laser beam fixed to measure the laser-induced breakdown spectroscopy, the axis specimen is rotated in the axial direction while rotating the concrete specimen together with the slide shaft by the shaft operation mechanism. I try to move it .

  In the concrete-containing material measuring method of the present invention, a feed male screw is formed on the peripheral surface of one of the pair of slide shafts, and the feed screw is configured to include the one slide shaft. By rotating the slide shaft, one of the slide shafts may be rotated together with the concrete specimen and moved in the axial direction by the action of the feed screw. The concrete-containing material measuring apparatus according to the present invention includes a feed male screw formed on a peripheral surface of one slide shaft of a pair of slide shafts and engaged with a feed male screw of the one slide shaft. It further has a formed member, and by rotating the other slide shaft, the one slide shaft is also rotated together with the concrete specimen and moved in the axial direction by the engaging action of the feed male screw and the feed female screw. Anyway. In these cases, the mechanism for rotating the concrete specimen and moving it in the axial direction can operate smoothly and satisfactorily even though it has a relatively simple configuration.

  According to the measuring method and measuring apparatus for a concrete-containing substance of the present invention, measurement can be performed without cutting the concrete specimen, so that the concrete specimen after measuring the concrete-containing substance can be used for other purposes such as a compressive strength test. It becomes possible to use as a test sample of the above, and it becomes possible to use the concrete specimen taken out from the actual structure sufficiently effectively by using it for a plurality of tests.

  According to the measuring method and measuring apparatus for a concrete-containing substance of the present invention, since the measurement can be performed without cutting the concrete specimen, the concrete specimen is cut in the case of measurement in the field of an actual structure. This makes it possible to save time and labor related to bringing in and preparing the machine, improving versatility as a method and mechanism for measuring concrete specimens, and as a method for measuring concrete-containing substances. It becomes possible to improve versatility.

  According to the method and apparatus for measuring a concrete-containing substance of the present invention, since the measurement can be performed on the outer peripheral surface of the concrete specimen without cutting the concrete specimen, the outer circumference of the concrete specimen is a diameter. Since the circumference ratio is π times, it is possible to secure a measurement area that is π times larger than the case where measurement is performed on the section of a concrete specimen. The integration of the (emission spectrum) becomes π times and the measurement sensitivity can be improved. Therefore, it becomes possible to reduce the diameter of the concrete specimen required to ensure the same measurement sensitivity as the conventional one, and the restriction on the place where the concrete specimen can be cut and taken out is relaxed. Until then, it becomes possible to take out the concrete specimen from a location where the concrete specimen could not be taken out, and it is possible to make the measurement sufficient for, for example, the evaluation of the soundness of the actual structure.

In addition, the concrete-containing material measuring method and measuring apparatus according to the present invention is a plurality of measurements that are spirally connected on the outer peripheral surface of the concrete specimen by moving the concrete specimen in the axial direction while rotating the shaft. Since the measurement related to laser-induced breakdown spectroscopy can be performed at a point, a large number of measurement points can be efficiently secured with respect to the outer peripheral surface area of the concrete specimen, improving the measurement sensitivity and increasing the diameter of the concrete specimen. It becomes possible to make it smaller.

In addition, the measuring method and measuring apparatus for a concrete-containing substance according to the present invention are provided with a pair of holding portions and a pair of slide shafts at both ends of a concrete specimen, so that the concrete specimen can be rotated and moved axially. As a result, it is possible to prevent the shake of the axial center position at the time, so that it is possible to perform measurement with good accuracy, that is, measurement with good accuracy.

Further, the measuring method and the measuring apparatus of the concrete containing materials of the present invention, by sliding shaft is moved axially by the action of the feed screw with the concrete specimen by being allowed to pivot, pivoting the concrete specimen It is possible to make it move smoothly and well with a relatively simple structure while moving it in the axial direction, so that it can be used as a general-purpose method / mechanism for measuring concrete specimens. It becomes possible to improve the versatility as a measuring method of concrete-containing substances.

It is a side view which shows an example of embodiment of the measuring method and measuring apparatus of the concrete containing substance of this invention. It is a top view of the state shown in Drawing 1 of a measuring method and measuring device of concrete content material of an embodiment. It is a side view of the measuring method and measuring apparatus of the concrete containing substance of embodiment, and is a figure which shows the state which the concrete test body moved from the state shown in FIG.1 and FIG.2. It is a perspective view explaining schematic structure of an example of other embodiments of the measuring method and measuring device of the concrete content material of the present invention.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  In FIG. 1 thru | or FIG. 3, an example of embodiment of the measuring method and measuring apparatus of the concrete containing substance of this invention is shown. Note that the X-axis direction, the Y-axis direction, and the Z-axis direction are defined as shown in FIGS. 1 to 3 (these axes correspond to a three-dimensional orthogonal coordinate system). In this embodiment, the X-axis direction and the Y-axis direction are horizontal, the X-axis arrow direction is the forward direction, the opposite direction to the arrow is the reverse direction, and the Z-axis direction is The direction of the arrow is the upward direction after the vertical direction.

  In the present invention, a columnar sample (referred to as “concrete specimen 10”; generally referred to as “core” in some cases) that is cut out from a concrete structure and taken out is used. The concrete specimen 10 is installed in a concrete-containing substance measuring device such that the axial direction of the columnar shape is along the X-axis direction.

  In the method for measuring a concrete-containing material according to the present embodiment, the surface of the columnar concrete specimen 10 is irradiated with laser light, and measurement related to laser-induced breakdown spectroscopy is performed.

  The concrete-containing substance measuring method is realized as a concrete-containing substance measuring apparatus. The concrete-containing material measuring apparatus according to the present embodiment performs measurement related to laser-induced breakdown spectroscopy by irradiating the surface of a columnar concrete specimen 10 with laser light.

  In addition, the concrete-containing material measuring method of the present embodiment is a cylindrical concrete when the concrete specimen 10 is irradiated with laser light having a fixed irradiation position and measurement related to laser-induced breakdown spectroscopy is performed. When the slide shaft 2 arranged coaxially with the axis of the specimen 10 is rotated and moved in the axial direction, the concrete specimen 10 moves in the axial direction while being rotated along with the slide shaft 2. I am trying to let you.

  The concrete-containing substance measuring method is realized as a concrete-containing substance measuring apparatus. The concrete-containing material measuring apparatus according to the present embodiment is arranged coaxially with the pair of holding portions 1 and 1 fitted to both ends in the axial direction of the columnar concrete specimen 10 and the axis of the concrete specimen 10. And a pair of slide shafts 2 and 2 attached to the pair of holding portions 1 and 1, respectively, and a shaft operation mechanism (4, 5) for rotating the slide shaft 2 and moving it in the axial direction. When the concrete specimen 10 is irradiated with a laser beam whose irradiation position is fixed and measurement related to laser-induced breakdown spectroscopy is performed, the shaft operating mechanism (4, 5) and the slide shafts 2, 2 are used to supply the concrete. The specimen 10 is moved in the axial direction while rotating the axis.

  Here, in the present embodiment, the shaft operating mechanism includes a shaft rotating mechanism 4 for rotating the slide shaft 2 and a shaft moving mechanism 5 for moving the slide shaft 2 in the axial direction. Yes.

  The pair of holding parts 1, 1 are for supporting the concrete specimen 10.

  The pair of holding portions 1 and 1 are formed in a disc shape, and the disc surfaces are arranged in parallel with each other with their centers (in other words, the center of gravity of the disc surfaces) aligned in the X-axis direction. Is done.

  A concave portion 1a into which an end portion of the concrete specimen 10 in the axial center direction (that is, the X-axis direction) is fitted is formed on the disk surface of each of the holding portions 1 and 1 facing the other holding portion 1.

  While the holding part 1 and the concrete specimen 10 are detachable, the concrete specimen 10 and the holding part 1 are positioned so as not to slide when the holding part 1 is mounted on the concrete specimen 10. Fixed.

  In this embodiment, the holding part 1 and the concrete specimen 10 are screwed from the outside of the concave part 1a with a flat-tip screw 1b with the end part in the axial direction of the concrete specimen 10 fitted in the concave part 1a. By being pressed, the outer peripheral surfaces of the concrete specimens 10 fitted in the recesses 1a are pressed down to be fixed to each other.

  The slide shaft 2 is fixedly attached to each of the holding portions 1 and 1 perpendicularly to the disk surface at the center position of the disk surface opposite to the disk surface on which the recess 1a is formed. In this embodiment, the one end part of the slide shaft 2 is fixed and attached to each other by being screwed into the holding part 1.

  That is, a pair of slides are attached to the holding portions 1 and 1 on both sides in the axial direction of the concrete specimen 10 coaxially with the axis of the concrete specimen 10 installed between the pair of holding portions 1 and 1. Shafts 2 and 2 are arranged.

  With the above-described configuration, the concrete specimen 10, the pair of holding portions 1 and 1, and the pair of slide shafts 2 and 2 are fixed to each other and move as a unit.

  The pair of slide shafts 2 and 2 are drive shafts for rotating the concrete specimen 10 about the axis (that is, around the X axis) and moving it in the axis direction (that is, the X axis direction).

  The pair of slide shafts 2 and 2 are supported by the holding slider 3 so that the shafts can rotate at positions close to the end on the holding unit 1 side. In other words, the pair of holding sliders 3 and 3 are disposed with the concrete specimen 10 and the holding portions 1 and 1 fitted to both ends thereof sandwiched in the X-axis direction.

  The holding slider 3 moves in the X-axis direction together with the slide shaft 2 that moves in the X-axis direction, and moves the slide shaft 2 at a position near the end on the concrete specimen 10 side (that is, the holding portion 1 side). It is for supporting.

  The holding slider 3 has a through hole 3c for penetrating and holding the slide shaft 2 at the top, and a pair of wheels 3d and 3d arranged at a lower end in the Y axis direction.

  On the peripheral surface of the portion of the slide shaft 2 that passes through the through hole 3c of the holding slider 3, a concave groove 2d that makes one round in the circumferential direction is formed. Further, on the inner peripheral surface of the through-hole 3c of the holding slider 3, a concave groove 2d of the slide shaft 2 and a convex portion that slidably engages in the direction of the concave groove 2d (that is, the circumferential direction of the slide shaft 2). 3e is formed.

  Then, by engaging the convex portion 3e with the concave groove 2d, the slide shaft 2 and the holding slider 3 are in the axial direction (that is, the X-axis direction) while the slide shaft 2 can rotate in the through hole 3c. ) Is fixed.

  Below the pair of slide shafts 2 and 2, a stage 7 is provided as a base having the X-axis direction as a longitudinal direction.

  The stage 7 fixes and holds at least the shaft operating mechanism (specifically, the shaft rotating mechanism 4 and the shaft moving mechanism 5 in the present embodiment) and movably mounts the pair of holding sliders 3 and 3. belongs to.

  The holding slider 3 moves on the stage 7 in the X-axis direction by the wheels 3d.

  With the configuration described above, the slide shaft 2 rotates about the holding slider 3, and when the slide shaft 2 moves in the X-axis direction, the holding slider 3 also moves in the X-axis direction.

  In the following, for convenience of explanation, the left holding unit 1 in the drawings is referred to as the first holding unit 1A and the right side in the drawings for the concrete-containing material measuring apparatus of the present embodiment shown in FIGS. The first holding shaft 1 is called the second holding portion 1B, the left slide shaft 2 in the figure is called the first slide shaft 2A, and the right slide shaft 2 in the drawing is the second slide shaft 2A. The left holding slider 3 in the drawing is called a first holding slider 3A, and the right holding slider 3 in the drawing is called a second holding slider 3B.

  The shaft rotation mechanism 4 is fixedly attached to one end (left end in FIG. 1) of the stage 7 via a fixing fitting 8 fixed to the one end.

  The shaft rotation mechanism 4 is for rotating the concrete specimen 10 through the first slide shaft 2A and the first holding portion 1A.

  In the present embodiment, the first slide shaft 2A is disposed so as to penetrate the shaft rotation mechanism 4 at a position where the first holding slider 3A is sandwiched between the first holding shaft 1A and the first holding portion 1A.

  Further, a long groove 2c in the axial direction is formed on the peripheral surface of the first slide shaft 2A, and slides in the direction of the long groove 2c and the long groove 2c (that is, the axial direction of the first slide shaft 2A). A member that engages with each other (referred to as an “engagement rotating member”; not shown) is disposed in the shaft rotation mechanism 4.

  The shaft rotation mechanism 4 includes a motor 4a as a drive source for rotating the first slide shaft 2A.

  Then, the rotational motion of the rotating shaft (or output shaft; not shown) of the motor 4a is transmitted to the engaging rotating member via the gear mechanism (not shown) in the shaft rotating mechanism 4, and the engaging rotation. When the member rotates around the X axis (specifically, rotates or revolves around the axis of the first slide shaft 2A), the first rotating shaft 2c engages with the first rotating shaft 2A. The slide shaft 2A rotates about the X axis.

  Although not shown, the shaft rotation mechanism 4 including the motor 4a controls the power source (battery) for driving the motor 4a, the on / off of the motor 4a, and sets the direction of rotation. And an operation panel for adjusting the rotation speed.

  On the other hand, the shaft moving mechanism 5 is fixedly attached to the other end portion in the X-axis direction of the stage 7 (the right end portion in FIG. 1) via a mounting bracket 9B attached to the other end portion. .

  The shaft moving mechanism 5 is for moving the concrete specimen 10 in the X-axis direction via the second slide shaft 2B and the second holding portion 1B.

  In the present embodiment, the second slide shaft 2B is disposed so as to penetrate the shaft moving mechanism 5 at a position where the second holding slider 3B is sandwiched between the second slide shaft 2B and the second holding portion 1B.

  Further, a feed male screw is formed on the peripheral surface of the second slide shaft 2B, and a feed female screw is formed on the inner peripheral surface of the through hole 5a through which the second slide shaft 2B of the shaft moving mechanism 5 passes.

  With the above configuration, the concrete specimen 10 that is fixed to the pair of holding portions 1A and 1B and the pair of slide shafts 2A and 2B and moves as a single unit is pivoted about the axis (around the X axis). It rotates and moves in the axial direction (X-axis direction).

  Specifically, how to operate the above-described concrete-containing substance measuring apparatus will be described below.

  For example, in the state shown in FIG. 1, when the motor 4a of the shaft rotation mechanism 4 is driven, the engagement rotation member of the shaft rotation mechanism 4 rotates and the first slide shaft 2A rotates about the X axis.

  Accordingly, the first holding part 1A connected to the first slide shaft 2A, the concrete specimen 10 fitted and fixed to the first holding part 1A, and the concrete specimen 10 are fitted and fixed. When the second holding portion 1B rotates as a unit, the second slide shaft 2B connected to the second holding portion 1B rotates about the X axis.

  When the second slide shaft 2B rotates, the feed screw is formed by meshing the feed male screw on the peripheral surface of the second slide shaft 2B with the feed female screw on the inner peripheral surface of the through hole 5a of the shaft moving mechanism 5. As a result, the second slide shaft 2B is fixed to each other and moved together with the second slide shaft 2B. The pair of holding portions 1A, 1B, the concrete specimen 10, and the first slide It moves in the X-axis direction together with the shaft 2A and enters the state shown in FIG.

  The long groove 2c on the peripheral surface of the first slide shaft 2A and the engaging rotation member disposed in the shaft rotation mechanism 4 slide in the direction of the long groove 2c (that is, the axial direction of the first slide shaft 2A). Since it engages so that it can move, the mechanism by these combinations does not become a hindrance to the first slide shaft 2A moving in the axial center direction while rotating.

  In this way, the concrete specimen 10 rotates about the axis (that is, about the X axis) and rotates in the axial direction (that is, the X axis direction) from the state shown in FIG. 1 to the state shown in FIG. )

  The direction of movement of the second slide shaft 2B in the X-axis direction (specifically, whether it is the forward direction or the reverse direction) depends on the rotation axis (output shaft) of the motor 4a of the shaft rotation mechanism 4. This is determined by the direction of axial rotation of the first slide shaft 2 </ b> A in conjunction with the direction of rotation and the direction of the second slide shaft 2 </ b> B and the feed screw of the shaft moving mechanism 5.

  Further, in the present embodiment, the first limit switch is provided via the mounting bracket 9A that is fixedly attached to one end of the stage 7 in the X-axis direction (the left end in FIG. 1; that is, the shaft rotating mechanism 4 side). 6A is provided, and a second limit switch 6B is provided via a mounting bracket 9B that is fixedly attached to the other end (the right end in FIG. 1).

  These limit switches 6A and 6B detect that the holding sliders 3A and 3B have approached themselves and output the detection, so that when the motor 4a of the shaft rotating mechanism 4 continues to be driven more than necessary, the holding unit 1 The slide shaft 2, the holding slider 3, and the concrete specimen 10 are for preventing breakage of each part due to continuing movement.

  In the example shown in FIGS. 1 to 3, limit switches 6A and 6B having a lever 6c are provided. For example, from the state shown in FIG. 1 to the state shown in FIG. When the concrete specimen 10 is moved, the limit switch 6B is actuated by the second holding slider 3B pushing the lever 6c of the second limit switch 6B in the state shown in FIG. The driving of the motor 4a stops.

  The concrete-containing material measuring apparatus configured as described above is used to measure the light emission intensity of the concrete core using laser-induced breakdown spectroscopy to measure the concrete-containing material.

  First, the core is rolled through and collected from the concrete frame to be evaluated. At this time, in the present invention, on the assumption that the area of the outer peripheral surface of the core is ensured as a measurement area, in addition to measurement of the measurement area and the concrete-containing material required for ensuring the desired measurement sensitivity, compression is performed. The size of the core is appropriately adjusted in consideration of whether or not the core is used as a sample for other tests such as a strength test, and the size that can be collected at each part of the concrete frame to be evaluated.

  The collected core is installed as a concrete specimen 10 in a concrete-containing material measuring apparatus. Specifically, both end portions in the axial direction of the core are fitted into the recesses 1a of the pair of holding portions 1A and 1B, the screws 1b are screwed, and the outer peripheral surfaces of the cores fitted into the recesses 1a are pressed. Attached and fixed as a concrete specimen 10 between the pair of holding portions 1A, 1B.

  Then, laser-induced breakdown spectroscopy is used to measure the emission intensity from the concrete specimen 10. Specifically, a pulsed laser beam is applied to the outer peripheral surface of the concrete specimen 10 to ablate the concrete-containing material, and light emitted from the material converted into plasma by this ablation is received and dispersed for each wavelength and emitted. A spectrum is obtained, and the substance contained in the concrete specimen 10 is specified based on the emission spectrum, and its concentration is determined as necessary.

  Since laser-induced breakdown spectroscopy itself is a well-known technique, details thereof are omitted here (for example, see JP2013-190411A and Japanese Patent No. 3500159).

  The method of laser beam irradiation is not limited to a specific mode as long as the laser beam is irradiated onto the concrete specimen 10 to generate plasma, and a single laser beam is irradiated (single laser beam). (Also referred to as a pulse method) or two laser beams may be irradiated (also referred to as a double pulse method).

  The measurement of the emission intensity is performed with the irradiation position of the laser beam fixed to the concrete-containing material measuring device. In the example shown in FIGS. 1 and 3, the lower left corner of the fixture 8 attached to the left end of the stage 7 is the origin O, the distance Dx from the origin O in the forward direction in the X-axis direction, and the distance Dz in the upward direction in the Z-axis direction. The irradiation position of the laser beam is fixed to the irradiation point 11. That is, in this embodiment, the emission intensity is measured after the irradiation position of the laser beam is fixed with respect to the stage 7.

  In this state, the concrete specimen 10 is pivoted about the axis (around the X axis) between the state shown in FIG. 1 and the state shown in FIG. Since it rotates and moves in the axial direction (X-axis direction), measurement related to laser-induced breakdown spectroscopy is performed at a plurality of measurement points that are spirally connected on the outer peripheral surface of the concrete specimen 10 having a cylindrical shape. .

  Then, by measuring the laser-induced breakdown spectroscopy using a concrete-containing substance measuring device, the light emission intensity at the outer peripheral surface of the concrete specimen 10 is measured in the axial direction of the concrete specimen 10 (that is, The distribution in the X axis direction), that is, the change in emission intensity due to the difference in depth from the surface of the concrete body can be acquired.

  Therefore, for example, the operation of the concrete-containing substance measurement device and the timing of the measurement of the emission intensity in laser-induced breakdown spectroscopy (in other words, the acquisition of the emission spectrum) are mechanically linked to each other. It is also possible to automatically acquire the combination data of the position in the axial direction (that is, the depth from the concrete housing surface) and the emission spectrum by machine control.

  Moreover, when the measuring device for the concrete-containing material and the laser for measuring the laser-induced breakdown spectroscopy (specifically, the position of the laser emission port) are fixed to each other. The measurement points on the outer peripheral surface of the concrete specimen 10 are sequentially moved and changed, while the distance and relative distance between the outer peripheral surface of the concrete specimen 10 and the laser (position of the laser emission port) are kept constant. Since measurement related to laser-induced breakdown spectroscopy can be performed in the state, laser light irradiation is appropriately performed without changing the positional relationship between the focal point of the laser light and the outer peripheral surface of the concrete specimen 10. It is possible to perform measurement related to induced breakdown spectroscopy well, that is, to perform measurement with good accuracy. .

  In addition, it is possible to perform spatially continuous measurement while moving the measurement points while keeping the measurement conditions constant, and the measurement results for each of the measurement points that have moved sequentially (specifically, emission intensity, emission It is possible to improve the measurement sensitivity by integrating the spectrum (as described above, as the combined data of the position of the concrete specimen 10 in the axial direction, that is, the depth from the concrete frame surface and the emission spectrum). Can also be used).

  According to the concrete-containing substance measuring method and measuring apparatus configured as described above, the concrete specimen 10 is used in the shape of a cylinder, and the concrete specimen 10 is moved in the axial direction while rotating the axis of the concrete specimen 10. Since the measurement is performed by irradiating the laser beam, the measurement related to the laser-induced breakdown spectroscopy can be performed without cutting the concrete specimen 10. Therefore, the concrete specimen 10 after measuring the concrete-containing substance can be used as a sample for other tests such as a compressive strength test, and the concrete specimen 10 taken out from the actual structure is used for a plurality of tests. Can be used effectively. Moreover, since the circumference of the concrete specimen 10 is π times the diameter of the diameter, it is possible to secure a measurement area that is π times that when measuring the split section of the concrete specimen 10, that is, The integration of the measurement results (specifically, the emission intensity and emission spectrum) is increased by π, and the measurement sensitivity can be improved. Therefore, it becomes possible to reduce the diameter of the concrete specimen 10 required to ensure the same measurement sensitivity as the conventional one, and the restriction on the location where the concrete specimen can be cut out is relaxed, It becomes possible to take out concrete specimens from places where it was not possible to take out concrete specimens so far, and it becomes possible to make it perfect as a measurement for, for example, soundness evaluation of actual structures .

  Although the above-described embodiment is an example of a preferred embodiment for carrying out the present invention, the embodiment of the present invention is not limited to the above-described embodiment, and the present invention is not deviated from the gist of the present invention. Various modifications can be made.

  For example, in the above-described embodiment, measurement is performed at a plurality of measurement points that are spirally connected on the outer peripheral surface of the concrete specimen 10 having a columnar shape by moving the concrete specimen 10 in the axial direction while rotating the shaft. However, the present invention is not limited to this, and one round of measurement is performed at a plurality of measurement points connected in the circumferential direction of the outer peripheral surface of the columnar shape (in other words, in an annular shape) by rotating the concrete specimen 10 axially. Next, after the concrete specimen 10 is moved by a predetermined distance in the axial direction, the axis is rotated again to measure one circumferential direction, and the concrete specimen 10 is further moved in the axial direction. Thereafter, the same may be repeated.

  In the above embodiment, the shaft rotating mechanism 4 and the shaft moving mechanism 5 are used as the shaft operating mechanism, and the concrete specimen 10 is moved in the axial direction while rotating the concrete specimen 10 together with the slide shaft 2. As long as the mechanism can be moved in the axial direction while rotating the slide shaft 2, the structure (mechanism) and combination of the shaft rotating mechanism 4 and the shaft moving mechanism 5 in the above-described embodiment are not included. Not limited. Specifically, for example, in the above-described embodiment, the shaft rotation mechanism 4 that constitutes a part of the shaft operation mechanism includes the motor 4a and is driven by the motor 4a via the gear mechanism (in other words, the gear mechanism is driven by the electric drive source). The first slide shaft 2A is rotated (by movement), but the slide shaft 2 may be rotated by manual drive by providing a handle for moving the gear mechanism instead of the motor 4a.

  In the above-described embodiment, the pair of holding sliders 3A and 3B are disposed with the concrete specimen 10 interposed therebetween. However, when stable shaft rotation of the slide shafts 2A and 2B is ensured, The holding slider 3 may be either one of the concrete specimens 10 or no holding slider 3 may be provided. When the holding slider 3 is not provided, the limit switches 6A and 6B may detect that the holding units 1A and 1B have approached themselves.

  In the above-described embodiment, the pair of slide shafts 2A and 2B is provided with a pair of slide shafts 2A and 2B sandwiching the concrete specimen 10 as a mechanism for rotating the concrete specimen 10 and moving it in the axial direction. However, the mechanism of the rotation and movement of the concrete specimen 10 is not limited to this. Specifically, for example, as shown in FIG. 4, the concrete specimen 10 is disposed apart along the axial direction of the concrete specimen 10 installed so that the axial direction is horizontal. A pair of cylindrical rollers 12A and 12B that are in contact with each other in the vicinity of the lower end of each of the rollers, and the pair of rollers 12A and 12B are aligned in the axial direction of these rollers 12A and 12B (in addition, coincident with the axial direction of the concrete specimen 10 And a uniaxial stage 13 to be moved. In the example shown in FIG. 4, the uniaxial stage 13 includes a base portion 13a and a moving stage portion 13b that is provided on the base portion 13a and linearly drives. In this case, by rotating the shaft of at least one of the pair of rollers 12A and 12B, the concrete specimen 10 placed on the rollers 12A and 12B is rotated and the uniaxial stage 13 is rotated. The concrete specimen 10 moves in the axial direction together with the pair of rollers 12A and 12B disposed on the moving stage portion 13b of the uniaxial stage 13 by linearly driving the moving stage portion 13b with respect to the base portion 13a. . FIG. 4 is a diagram for explaining a schematic configuration, which shows only a rough configuration and omits detailed mechanisms. For example, in FIG. 4, a mechanism for rotating at least one of the pair of rollers 12A and 12B and a mechanism for supporting these rollers 12A and 12B are not shown.

  In the above-described embodiment, the concrete-containing material measuring device is installed so that the X-axis direction in FIGS. 1 to 3 is horizontal and the Z-axis direction is vertical. The mode of installation of the substance measuring apparatus is not limited to this, and the substance measuring apparatus may be installed such that the X-axis direction becomes the vertical direction and the Z-axis direction becomes the horizontal direction. In this case, the holding sliders 3 and 3 may not be provided. When installed so that the X-axis direction becomes the vertical direction and the Z-axis direction becomes the horizontal direction, even when the holding sliders 3 and 3 are not provided, the concrete specimen 10 is rotated during the axial rotation and axial movement. Posture stability can be ensured. Therefore, the holding sliders 3 and 3 are not essential in the present invention in this respect. In this case, the holding portion 1 and the slide shaft 2 are arranged only on either the upper end side or the lower end side of the concrete specimen 10 installed so that the axial direction is the vertical direction. May be. Even when only one of the upper end side and the lower end side is used, the stability of the posture of the concrete specimen 10 during the axial rotation and axial movement can be ensured, and the axial rotation mechanism 4 and the axial movement mechanism 5 can be used together. The slide shaft 2 of the book may be rotated and moved in the axial direction.

1 (1A, 1B) Holding part 2 (2A, 2B) Slide shaft 3 (3A, 3B) Holding slider 4 Axis rotating mechanism 5 Axis moving mechanism 6 (6A, 6B) Limit switch 7 Stage 8 Fixing bracket 9A, 9B Mounting bracket 10 Concrete specimen 11 Irradiation points 12A, 12B Roller 13 Axis stage

Claims (4)

When the measurement of laser-induced breakdown spectroscopy is performed by irradiating the surface of a cylindrical concrete specimen penetrated from a concrete structure with a laser beam with a fixed irradiation position,
A pair of holding parts are fitted to both ends in the axial direction of the concrete specimen and a pair of slide shafts arranged coaxially with the axis of the concrete specimen are attached to each of the pair of holding parts,
The concrete-containing material, wherein the slide shaft is rotated and moved in the axial direction, whereby the concrete specimen is moved in the axial direction while being rotated along with the slide shaft. Method for measuring substances. A feed male screw is formed on the peripheral surface of one slide shaft of the pair of slide shafts, the feed screw is configured to include the one slide shaft, and the other slide shaft is rotated to rotate the concrete. measurement method of concrete containing material of claim 1, wherein the said one of the slide shaft together with the specimen together also by axial rotation is moved in the axial direction by the action of the feed screw. A holding part fitted as a pair to each of both ends in the axial direction of the columnar concrete specimen penetrating from the concrete structure, and arranged coaxially with the axis of the concrete specimen and A slide shaft that is attached to each of the holding portions as a pair, and an axis operation mechanism that rotates the slide shaft and moves it in the axial direction;
When the laser beam having a fixed irradiation position is irradiated onto the surface of the concrete specimen and measurement related to the laser-induced breakdown spectroscopy is performed, the concrete specimen is pivoted together with the slide shaft by the shaft operating mechanism. An apparatus for measuring a concrete-containing material, characterized by being moved in the axial direction while being rotated . A feed male screw is formed on the peripheral surface of one slide shaft of the pair of slide shafts, and a member having a feed female screw engaged with the feed male screw of the one slide shaft is further provided, and the other slide according to claim 3, wherein by rotating the shaft axis and wherein the moving in the axial direction by the engagement action of the feed internal thread and the feed male screw causes also axial rotation the one of the slide shaft together with the concrete specimen Measuring equipment for concrete-containing materials.

Images