Vibration measurement tool, vibration measurement system, and vibration measurement method

Abstract

To provide a vibration measuring tool, a vibration measuring system, and a method for measuring a vibration which can stably and precisely measure a vibration of each structure forming a floor surface.SOLUTION: A vibration measuring tool 10 is a metal vibration measuring tool which is attached to a lower surface of a structural material of an architectural structure and holds a vibration measuring device 20. The vibration measuring tool includes: a pair of top plates 11; a pair of side plates 12 extending downward from each of the pair of top plates 11; and a mounting plate 13 connecting the pair of side plates 12. The vibration measuring device 20 is mounted on an upper surface of the mounting plate 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vibration measurement jig, a vibration measurement system, and a vibration measurement method for measuring the vibration of a beam. [Background technology]

[0002] Conventionally, devices for measuring vibrations of structures have been known (see, for example, Patent Document 1). In particular, for buildings, a vibrating floor device is known that is placed on the floor surface of an upper floor to measure the vibrations of the floor surface. By placing it on the floor surface, the vibration measuring device can be stabilized and vibrations can be measured with high accuracy. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2017-507334 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to install a vibration measuring device, access to the floor surface of the upper floor is essential. If the floor surface of the upper floor cannot be accessed, the vibration measuring device cannot be installed. Since the device is placed on the floor surface, the vibrations measured by the vibration measuring device include all vibrations of the entire structure, such as the beams, floor slabs, floor underlayment, and floor slabs. Therefore, it is preferable to be able to stably and accurately measure the vibrations of each structure that constitutes the floor surface.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a vibration measurement jig, a vibration measurement system, and a vibration measurement method that are capable of stably and accurately measuring the vibrations of each structure that makes up a floor surface. [Means for solving the problem]

[0006] (1) The vibration measuring jig of claim 1 is a metallic vibration measuring jig that is attached to the underside of a structural material of a building to hold a vibration measuring device, and comprises a pair of top plates, a pair of side plates extending downward from each of the pair of top plates, and a mounting plate connecting the pair of side plates, and the vibration measuring device is placed on the upper surface of the mounting plate.

[0007] According to the above-mentioned configuration, the vibration of the structural material is transmitted from the structural material to the support plate through the top plate and the side plate. The vibration of the support plate is measured by the vibration measuring device. Since the vibration measuring tool can be attached from below the structural material, the vibration of the beam can be measured from a room located below the structural material.

[0008] (2) A vibration measurement jig according to claim 2 is the vibration measurement jig according to claim 1, further comprising a first reinforcing plate connecting the lower surface of the top plate and the outer surface of the side plate.

[0009] According to the above-mentioned configuration, the rigidity of the vibration measuring jig is increased, and the vibration of the structural material is easily transmitted to the mounting plate.

[0010] (3) A vibration measurement jig according to claim 3 is the vibration measurement jig according to claim 1 or 2, further comprising a second reinforcing plate connecting the inner surface of the side plate and the upper surface of the mounting plate.

[0011] According to the above-mentioned configuration, the rigidity of the vibration measuring jig is increased, and the vibration measuring device placed on the mounting plate is less likely to fall.

[0012] (4) The vibration measurement system of claim 4 comprises a structural material of a building, a metallic vibration measurement jig attached to the underside of the structural material, and a vibration measurement device, the vibration measurement jig comprising a pair of top plates attached to the underside of the structural material, a pair of side plates extending downward from each of the pair of top plates, and a mounting plate connecting the pair of side walls, and the vibration measurement device is mounted on the upper surface of the mounting plate.

[0013] (5) The vibration measuring method of claim 5 is a vibration measuring method using a metallic vibration measuring tool having a pair of top plates, a pair of side plates extending downward from each of the pair of top plates, and a mounting plate connecting the pair of side walls, in which a vibration measuring device is placed on the mounting plate, the pair of top plates are attached to the underside of a structural material of a building from below the structural material, and the vibration of the structural material is measured using the vibration measuring device. Effect of the Invention

[0014] According to the vibration measurement jig, vibration measurement system, and vibration measurement method of the present invention, the vibration of each structure constituting a floor surface can be measured stably and accurately. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a vibration measurement system. [Diagram 2] FIG. 2 is a plan view showing the vibration measurement jig. [Diagram 3] FIG. 3 is a bottom view showing the vibration measurement jig. [Figure 4] FIG. 4 is a side view showing the vibration measurement jig. [Diagram 5] FIG. 5 is another side view showing the vibration measurement jig. [Figure 6] FIG. 6 is a perspective view showing a vibration measuring jig. [Figure 7] FIG. 7 is another perspective view showing the vibration measurement jig. [Figure 8] FIG. 8 is a perspective view of the vibration measuring device placed on a vibration measurement jig. [Figure 9] FIG. 9 is a bottom view showing the positional relationship between the beams of the building and the vibration measurement jig. [Figure 10] FIG. 10 is a perspective view of a vibration measuring jig installed on a vibration control device for a building. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. Note that the embodiment described below is merely an example in which the present invention is realized, and it goes without saying that the embodiment can be appropriately modified without departing from the gist of the present invention.

[0017] In the following description, the direction is the direction from the starting point of the arrow to the end point, and the direction is the movement on the line connecting the starting point and the end point of the arrow. For the vibration measurement jig 10, the vibration measurement system 1, and the vibration measurement method, a vertical direction 7, a front-rear direction 8, and a left-right direction 9 are given. The front-rear direction 8 and the left-right direction 9 are both horizontal directions perpendicular to the vertical direction 7 and perpendicular to each other. The front-rear direction 8 is a direction that intersects with the longitudinal direction of the web 101 of the beam 100, which will be described later in detail. The left-right direction 9 is a direction that is along the longitudinal direction of the web 101 of the beam 100, which will be described later in detail.

[0018] 1, the vibration measurement system 1 is a system that measures vibrations of a beam 100 (an example of a structural material) of a building. In the vibration measurement system 1, for example, a vibration measurement device 20 is connected to an underside 103 of the beam 100 via a vibration measurement jig 10. The vibration measurement system 1 includes the beam 100, the vibration measurement jig 10, and the vibration measurement device 20.

[0019] [Beam 100] The beam 100 supports the floor of an upper floor in a building such as an apartment building. The floor is made of, for example, an autoclaved lightweight aerated concrete (ALC) panel, a floor underlayment, a decorative material, etc. The beam 100 is, for example, an H-shaped steel, and is positioned with its longitudinal direction facing the front-to-rear direction 8. The web 101 of the beam 100 is positioned along the up-to-down direction 7. The flanges 102 of the beam 100 extend from the upper and lower ends of the web 101 to both the left and right sides, respectively.

[0020] [Vibration measurement fixture 10] As shown in Fig. 1, the vibration measurement jig 10 is attached to a lower surface 103 of a beam 100 of a building to hold a vibration measurement device 20, which will be described later. The vibration measurement device 20 is made of, for example, metal. As shown in Figs. 2 to 7, the vibration measurement jig 10 includes a top plate 11, a side plate 12, a mounting plate 13, a first reinforcing plate 14, a second reinforcing plate 15, and a fixing member 16. In the following description of the vibration measurement jig 10, the direction in which the vibration measurement jig 10 approaches or moves away from the lower surface 103 of the beam 100 is referred to as an up-down direction 7. In the state in which the vibration measurement jig 10 is attached to the lower surface 103 of the beam 100, the direction perpendicular to the web 101 of the beam 100 is referred to as a front-rear direction 8 (see Fig. 9).

[0021] As shown in Fig. 1 to Fig. 7, the top plates 11 are a pair of plate bodies. The top plates 11 are flat plates extending in the front-rear direction 8 and the left-right direction 9. The top plates 11 are arranged at intervals along the left-right direction 9. The top plates 11 have a generally trapezoidal outer shape in a plan view. The end faces of the top plates 11 on the lower base 111 side (longer side side) face each other. The upper surface 113 of the top plates 11 is the contact surface that comes into contact with the beam 100 when the vibration measurement jig 10 is attached to the beam 100.

[0022] The tabletop 11 has a plurality of through holes 112 that penetrate in the thickness direction (vertical direction 7) (see Figs. 2 and 3). Four through holes 112 are positioned along the trapezoidal shape of each tabletop 11. The through holes 112 are, for example, positioned symmetrically with respect to a central position C (see Fig. 2) in the front-rear direction 8.

[0023] As shown in Figs. 1 to 7, the side panels 12 are a pair of flat panels arranged in the left-right direction 9. The main surfaces of the side panels 12 extend along the up-down direction 7 and the front-rear direction 8. The side panels 12 have a rectangular outer shape in a side view (see Fig. 4). The side panels 12 extend downward from each of the pair of tabletops 11. Specifically, the side panels 12 extend downward from opposing ends of the tabletop 11. The main surfaces (hereinafter also referred to as inner surfaces 121) of the pair of side panels 12 face each other in the left-right direction 9. The length of the side panels 12 in the front-rear direction 8 is, for example, the same as the length of the above-mentioned ends of the tabletop 11 in the front-rear direction 8.

[0024] The mounting plate 13 is a flat plate with a rectangular outer shape in plan view. The main surface of the mounting plate 13 extends along the front-rear direction 8 and the left-right direction 9. The mounting plate 13 connects a pair of side plates 12. Specifically, both ends of the mounting plate 13 in the direction along the left-right direction 9 are continuous with the lower ends of the pair of side plates 12. The length of the mounting plate 13 along the front-rear direction 8 is the same as the length of the side plates 12 along the front-rear direction 8. The length L1 by which the upper surface 131 of the mounting plate 13 and the upper surface 113 of the top plate 11 are separated in the vertical direction 7 is larger than the height of the vibration measuring device 20 described later. The top plate 11, the side plates 12, and the mounting plate 13 may be formed by bending a single steel plate, or may be configured by welding a plurality of steel plates.

[0025] The first reinforcing plate 14 is a pair of flat plates positioned in the left-right direction 9. As shown in FIG. 4, the outer shape of the first reinforcing plate 14 is triangular in side view. The main surface of the first reinforcing plate 14 extends along the vertical direction 7 and the left-right direction 9. The first reinforcing plate 14 connects the lower surface 114 of the top plate 11 and the outer surface 122 of the side plate 12.

[0026] The second reinforcing plate 15 is a plurality of flat plates. As shown in FIGS. 4 and 6, the outer shape of the second reinforcing plate 15 is triangular in side view. The main surface of the second reinforcing plate 15 extends along the vertical direction 7 and the left-right direction 9. The second reinforcing plate 15 connects the inner surface 121 of the side plate 12 and the upper surface 131 of the mounting plate 13. There are four second reinforcing plates 15. Each of the second reinforcing plates 15 is close to the four corner portions 132 on the upper surface 131 of the mounting plate 13 (see FIG. 2). The length L2 of the lower end of the second reinforcing plate 15 is shorter than half of the length L3 of the mounting plate 13 in the left-right direction 9 (L2 < L3 / 2). A space 153 is located between the second reinforcing plates 15 arranged in the left-right direction 9.

[0027] As shown in FIG. 1, the fixture 16 is, for example, a bolt and a nut. For example, a bolt is inserted through the through hole 112 and the through hole of the flange 102 of the beam 100, and a nut is screwed onto the bolt above the flange 102, whereby the vibration measuring jig 10 is fixed to the beam 100.

[0028] [Vibration measuring device 20] The vibration measuring device 20 is, for example, a vibration level meter. As shown in Fig. 1, the vibration measuring device 20 is a stationary measuring device that measures vibrations transmitted to its underside. The vibration measuring device 20 measures vibration levels in three directions, for example, an up-down direction 7, a front-rear direction 8, and a left-right direction 9. As the vibration measuring device 20, for example, a well-known vibration pickup disclosed in JP-A-06-341891 and the like can be used.

[0029] (Attachment of vibration measuring device 20 to beam 100) Next, the installation of the vibration measuring device 20 will be described. The vibration measurement jig 10 is placed, for example, on a floor or a desk in a room located below the beam 100, with the upper surface 131 of the mounting plate 13 facing upward. Next, as shown in Fig. 8, the vibration measuring device 20 is placed on the mounting plate 13 of the vibration measurement jig 10. The vibration measuring device 20 is located in a space surrounded by the four second reinforcing plates 15, the upper surface 131 of the mounting plate 13, and the inner surface 121 of the side plate 12 (see Figs. 1 and 8). A connection line 91 such as a cable connected to the vibration measuring device 20 extends outward from a position in the space 153 between the two second reinforcing plates 15 (see Fig. 1).

[0030] Next, the vibration measurement jig 10 is lifted from the floor, a desk, or the like. The vibration measurement jig 10 is brought close to the beam 100 to be measured from below the beam 100. As the vibration measurement jig 10 is brought close to the beam 100, the upper surface 113 of the top plate 11 comes into contact with the lower surface of the beam 100. As shown in FIG. 9, the first reinforcing plate 14 of the vibration measurement jig 10 is aligned below the web 101 of the beam 100 so as to overlap in the up-down direction 7. With the first reinforcing plate 14 and the web 101 aligned, the fixing device 16 is inserted into the through hole 112. As a result, the top plate 11 of the vibration measurement jig 10 is attached to the lower surface of the beam 100.

[0031] (Vibration measurement by vibration measuring device 20) Next, the measurement of vibration by the vibration measuring device 20 will be described. When the beam 100 vibrates, the vibration measurement jig 10 also vibrates together with the beam 100. The top plate 11 of the vibration measurement jig 10 vibrates together with the beam 100. Specifically, the top plate 11 vibrates in accordance with the vibration of the beam 100 in the up-down direction 7, the left-right direction 9, and the front-back direction 8. The vibration of the top plate 11 is transmitted to the side plate 12 and the mounting plate 13. The vibration measuring device 20 vibrates in accordance with the vibration of the mounting plate 13. The vibration measuring device 20 detects the vibration level in each of the up-down direction 7, the left-right direction 9, and the front-back direction 8, and outputs an electric signal. The electric signal output by the vibration measuring device 20 is analyzed by a calculation device or the like to measure the vibration of the beam 100.

[0032] (Effects of the embodiment) The vibration of the beam 100 is transmitted from the beam 100 to the mounting plate 13 through the top plate 11 and the side plate 12. The vibration of the mounting plate 13 is measured by a vibration measuring device 20. Since the vibration measuring jig 10 can be attached from below the beam 100, the vibration of the beam 100 can be measured by working from a room located below the beam 100.

[0033] The presence of the first reinforcing plate 14 increases the rigidity of the vibration measurement jig 10 , making it easier for vibrations of the structural material to be transmitted to the mounting plate 13 .

[0034] The positioning of the second reinforcing plate 15 increases the rigidity of the vibration measurement jig 10. The vibration measurement device 20 placed on the placement plate 13 is less likely to fall.

[0035] (Modification) In the above embodiment, the beam 100 is described as an example of the structural material, but the present invention is not limited thereto. The structural material may be a floor panel such as an ALC panel. This allows the inherent vibration of the floor panel to be measured. As shown in FIG. 10, the structural material may be installed between the beams 100 arranged in parallel in a direction intersecting the extension direction (for example, the front-rear direction 8) and fixed to the lower surface 162 of the mass 161 (weight) of the tuned mass damper 150 (TMD: Tuned Mass Damper), which is a vibration damping device for the beams 100. In this case, the vibration measuring jig 10 is fixed, for example, with the direction along the plate surface of the first reinforcing plate 14 facing the front-rear direction 8. This allows the vibration in the tuned mass damper to be measured. The beam 100 is not limited to the steel beam 100, and may be a wooden beam or the like.

[0036] In the above embodiment, the bolt and nut are exemplified as the fixing device 16, but the fixing device 16 is not limited thereto. The fixing device 16 may be, for example, a magnet. The beam 100 may be a ferromagnetic material such as iron. The magnet may be located between the upper surface 113 of the top plate 11 and the lower surface 103 of the beam 100. This allows the vibration measurement jig 10 to be fixed to the beam 100 without changing the shape of the beam 100. The fixing device 16 may be, for example, a screw. This allows the vibration measurement jig 10 to be fixed to the beam 100 without changing the shape of the beam 100 or the floor panel. The fixing device 16 may be a double-sided tape or a hook-and-loop fastener, etc., as long as it can fix the vibration measurement jig 10 to the structure.

[0037] In the above embodiment, a vibration pickup is exemplified as the vibration measuring device 20, but the present invention is not limited to this. If the purpose is to confirm the natural vibration frequency of a structure, a small measuring device such as a smartphone having an accelerometer may be used.

[0038] The vibration measurement jig 10 is a jig for measuring vibrations of structural materials of buildings, and is used to attach a vibrometer to the underside of an architectural structure. It has a mounting plate 13 on which the vibrometer is placed between two side plates 12. A top plate 11 connected to the upper ends of the two side plates 12 is a fixed plate that is fixed to the underside of the architectural structure.

[0039] [Claim 1] A metal vibration measurement jig that is attached to the underside of a structural member of a building and holds a vibration measurement device, A pair of tabletops, A pair of side panels extending downward from each of the pair of top panels; A mounting plate connecting the pair of side plates, A vibration measuring fixture on which the vibration measuring device is placed on an upper surface of the mounting plate.

[0040] [Claim 2] 2. The vibration measurement jig according to claim 1, further comprising a first reinforcing plate connecting a lower surface of the top plate and an outer surface of the side plate.

[0041] [Claim 3] 3. The vibration measurement fixture according to claim 2, further comprising a second reinforcing plate connecting the inner surface of the side plate and an upper surface of the mounting plate.

[0042] [Claim 4] Structural materials for buildings; a metal vibration measuring tool attached to the bottom surface of the structural material; A vibration measuring device, The vibration measurement jig is A pair of top plates attached to the lower surface of the structural material; A pair of side panels extending downward from each of the pair of top panels; A mounting plate connected to the pair of side walls, A vibration measuring system in which the vibration measuring device is placed on an upper surface of the mounting plate.

[0043] [Claim 5] A vibration measurement method using a metal vibration measurement jig including a pair of tabletops, a pair of side walls extending downward from each of the pair of tabletops, and a mounting plate connecting the pair of side walls, A vibration measuring device is placed on the mounting plate. The pair of top plates are attached to the lower surface of the structural material of the building from below the structural material; A vibration measuring method for measuring vibrations of the structural material by the vibration measuring device. [Explanation of symbols]

[0044] 1. Vibration measurement system 11 Tabletop 12 Side Panel 13 Placement plate 14 First reinforcing plate 15 Second reinforcing plate 20 Vibration measuring device 10 Vibration measurement fixture 100 beams 103,114 Bottom surface 121 Inside 122 External surface 131 Top surface

Claims

1. A metal vibration measurement jig that is attached to the underside of a structural member of a building and holds a vibration measurement device, A pair of tabletops, A pair of side panels extending downward from each of the pair of top panels; A mounting plate connecting the pair of side plates, A vibration measuring fixture on which the vibration measuring device is placed on an upper surface of the mounting plate.

2. 2. The vibration measurement jig according to claim 1, further comprising a first reinforcing plate connecting a lower surface of the top plate and an outer surface of the side plate.

3. 3. The vibration measuring tool according to claim 2, further comprising a second reinforcing plate connecting the inner surface of the side plate and the upper surface of the mounting plate.

4. Structural materials for buildings; a metal vibration measuring tool attached to the bottom surface of the structural material; A vibration measuring device, The vibration measurement jig is A pair of top plates attached to the lower surface of the structural material; A pair of side panels extending downward from each of the pair of top panels; A mounting plate connected to the pair of side walls, A vibration measuring system in which the vibration measuring device is placed on an upper surface of the mounting plate.

5. A vibration measurement method using a metal vibration measurement jig including a pair of tabletops, a pair of side walls extending downward from each of the pair of tabletops, and a mounting plate connecting the pair of side walls, A vibration measuring device is placed on the mounting plate. The pair of top plates are attached to the lower surface of the structural material of the building from below the structural material; A vibration measuring method for measuring vibrations of the structural material by the vibration measuring device.

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