JP4839350B2 - Displacement measuring device - Google Patents

Description

  The present invention relates to a displacement measuring device that measures the displacement of a structure.

Conventionally, various displacement measuring devices for measuring the displacement of a structure such as a building have been used.
Among these displacement measuring devices, there are a vibration sensor fixed to the building and vibrating with the building, a slit plate connected to the vibration sensor, and a light emitting unit and a light receiving unit disposed opposite to each other with the slit plate interposed therebetween. (For example, refer to Patent Document 1).
When the building vibrates, the slit plate vibrates through the vibration sensor, and the light emitted from the light emitting unit reaches or is blocked by the light emitting unit through the slit, thereby causing the displacement signal from the light emitting unit. Is output, and the displacement of the building is calculated from these displacement signals.
JP-A-8-101278

  However, in the displacement measuring apparatus described in Patent Document 1 as described above, the slit plate, the light emitting unit, and the light receiving unit vibrate together with the building, and thus there is a problem that the displacement of the building cannot be measured with high accuracy. .

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the displacement measuring apparatus which can measure the displacement of a building with high precision.

In order to solve the above problems, the present invention provides the following means.
The present invention is a displacement measuring device that is provided in a structure and measures the displacement of the structure,
An attachment support portion attached to the structure, a support plate portion supported by the attachment support portion so as to be movable in a first horizontal direction, and formed to face the attachment support portion and the support plate portion, respectively. A spherical body disposed between the first long groove and the second long groove, and a connecting rod extending from the support plate portion through a first slit formed between the first long grooves disposed in the mounting support portion. A movable support unit coupled and supported so as to be movable in a second horizontal direction orthogonal to the first horizontal direction, and a support body supported by the movable support unit so as to be movable in the second horizontal direction A spherical body disposed between the third long groove and the recess respectively formed facing the moving support part and the support body, and provided on the lower surface of the support body via the second slit. Displacement calculation sensor part exposed under the moving support and front And horizontally displaceable reference plate have the provided opposite to the displacement calculating the sensor unit on the lower surface of the inner peripheral surface of the frame portion of the mounting support and the structure surrounding the moving support, have a, And an absolute displacement calculator that calculates the absolute displacement in the horizontal direction of the structure.

Further, the present invention is characterized in that the first long groove to the third long groove and the recess have a circular cross section, and the curvature of the cross section is smaller than the curvature of the spherical body. .

Further, the present invention is characterized in that the attachment support part and the movement support part are attached to the lower surface side of the floor of the structure.

According to the present invention, even if the mounting support part and the moving support part vibrate in the horizontal direction together with the building, the support body hardly displaces in the horizontal direction due to inertia. It can be measured with high accuracy.

(Embodiment 1)
Hereinafter, a displacement measuring apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the displacement measuring device 1 is attached to a building (structure) K and measures the absolute displacement of the building K caused by an earthquake or wind.
As shown in FIGS. 2 and 3, the displacement measuring apparatus 1 includes a support portion 2 extending in a rectangular tube shape and a rectangular plate-like support body 3 disposed in the support portion 2.

The support portion 2 includes a substrate portion 22 that extends in a plate shape, and a rectangular tube portion 23 that is provided integrally with the substrate portion 22.
The longitudinal dimensions of the substrate portion 22 and the rectangular tube portion 23 are equal, and the short dimension is shorter in the rectangular tube portion 23. The square tube portion 23 is disposed at the center of the substrate portion 22 in the short direction.
The board portion 22 is fixed to the lower surface side of the slab S of the building K with an adhesive, a fixing screw, or the like. That is, the board | substrate part 22 is extended in one direction (horizontal direction h1) of the horizontal direction.
In the difference area 22a between the substrate portion 22 and the rectangular tube portion 23 on the lower surface of the substrate portion 22, a communication portion 4 for storing and transmitting / receiving data is provided.

A pair of long grooves 23b extending linearly in the horizontal direction h1 (longitudinal direction) is formed on the lower surface (support surface) 23a of the inner peripheral surface of the rectangular tube portion 23. The cross section of the long groove 23b is formed in a circular shape.
The pair of long grooves 23b are gently curved downward as shown in FIG. The deepest portion P2 of the long groove 23b is set at the center position in the longitudinal direction of the rectangular tube portion 23.
A spherical bearing (spherical body) 24 is placed in the long groove 23b. The bearing 24 is configured to roll in the horizontal direction h1 in the long groove 23b. Further, as shown in FIG. 2, the curvature of the long groove 23b is smaller than the curvature of the bearing 24, and the friction when the bearing 24 rolls in the long groove 23b is reduced.
On the bearing 24, the support body 3 is placed.

A recess 3 a having a circular cross section is formed on the lower surface of the support 3. Four recesses 3 a are formed corresponding to the four corners on the lower surface of the support 3. Further, the cross section of the recess 3a when the support 3 is viewed from the side is formed in the same shape as the long groove 23b, and the recess 3a is formed in the long groove 23b in a state where the support 3 is placed on the bearing 24. Oppositely arranged in the vertical direction v. That is, the opening of the recess 3a and the opening of the long groove 23b are arranged to face each other in the vertical direction v, and the bearing 24 is disposed between the recess 3a and the long groove 23b. Note that the curvature of the recess 3 a is also smaller than the curvature of the bearing 24.
An upper pen (displacement calculation sensor unit) 5 is provided on the upper surface of the support 3. The anotopen 5 includes a sensor (not shown) that reads the dots of the anoto pattern and a calculation unit (not shown) that calculates an absolute displacement based on an output from the sensor. A reference plate (absolute displacement calculation unit) 6 on which an Anoto pattern is printed is attached to the upper surface of the inner peripheral surface of the rectangular tube portion 23. When the reference plate 6 vibrates in the horizontal direction h1 together with the rectangular tube portion 23, the anotopen 5 reads the dots on the reference plate 6 and calculates the absolute displacement.

In addition, an operation detection unit 7 that detects the operation of the support 3 is provided on a side surface of the inner peripheral surface of the rectangular tube unit 23. The motion detection unit 7 includes, for example, a mechanical switch. When the support unit 2 moves in the horizontal direction h1 with respect to the support 3, the switch is turned on and a drive signal is output to the control unit 8.
The control unit 8 is connected to the operation detection unit 7, a control unit (not shown) of the anotopen 5, and the communication unit 4. The control unit 8 receives the drive signal output from the operation detection unit 7, drives the anotopen 5, and outputs the detection result of the anotopen 5 to an external device via the communication unit 4.

Next, the operation of the displacement measuring apparatus 1 in the present embodiment configured as described above will be described.
When a vibration in the horizontal direction h1 occurs in the building K due to an earthquake or the like, the support portion 2 vibrates in the horizontal direction h1 via the slab S. At this time, as shown in FIGS. 5 and 6, since the support 3 is placed on the bearing 24, even if the support portion 2 moves in the horizontal direction h <b> 1, the bearing 24 rolls, The support 3 is hardly displaced in the horizontal direction h1. In particular, since the curvature of the long groove 23b and the concave portion 3a is smaller than the curvature of the bearing 24, the contact area between the long groove 23b and the concave portion 3a and the bearing 24 is minutely suppressed, and the long groove 23b and the concave portion 3a and the bearing 24 are suppressed. The friction between is very small. Therefore, even if the support part 2 is mutated in the horizontal direction h1, the support 3 remains at one point (fixed point P1) in the horizontal direction h1 due to inertia.

  At this time, since the support part 2 is displaced in the horizontal direction h1 with respect to the support body 3, the mechanical switch is turned on via the support body 3, and a drive signal is output from the motion detection part 7. When the controller 8 reads the drive signal, the controller 8 drives the anotopen 5. The anotopen 5 is fixed to the fixed point P1 by inertia, whereas the upper reference plate 6 moves in the horizontal direction h1 via the support portion 2. Then, the anotopen 5 reads the dots on the reference plate 6 that moves in the horizontal direction h1, and calculates the displacement of the reference plate 6 as the absolute displacement of the building K. The anotopen 5 outputs the calculation result as absolute displacement information to the control unit 8, and the control unit 8 transmits the absolute displacement information and time information output from a clock unit (not shown) to the external device via the communication unit 4. To do.

  In addition, when the earthquake ends and the vibration of the building K is cured, as shown in FIG. 4, since the long groove 23b is curved downward, the bearing 24 rolls toward the deepest portion P2 by its own weight. And the bearing 24 stops in the state which the center point P1 in the horizontal direction h1 of the support body 3 was arranged on the deepest part P2 and the vertical line. That is, when no vibration is generated in the building K, the support 3 is always held by its own weight at the center position in the longitudinal direction of the support 2.

As described above, according to the displacement measuring apparatus 1 in the present embodiment, the support 3 itself can be held at the fixed point P in the horizontal direction h1 even if vibration occurs in the building K. The absolute displacement of the building K can be measured with high accuracy.
Further, the measurement accuracy can be improved by a simple configuration in which the support 3 is placed on the bearing 24.
Moreover, since the long groove 23b and the recessed part 3a are arrange | positioned facing the perpendicular direction v, and the bearing 24 is distribute | arranged among them, the support body 3 can be reliably fastened to the fixed point P with a simple structure.
Moreover, since the curvature of the long groove 23b and the recessed part 3a is smaller than the curvature of the bearing 24, the friction between the long groove 23b and the recessed part 3a and the bearing 24 can be made small, and the support body 3 is fixed to the fixed point P1. Can be stopped.

Further, since the long groove 23b is curved downward, the support 3 can be held at the deepest portion P2 by its own weight when the building K is not vibrated.
Moreover, since the support part 2 is attached to the lower surface of the slab S, the support part 2 can be attached to a position in the building K that is not affected by a human living space or work space. The measurement accuracy can be further improved by installing a plurality of them on the screen.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
7 to 9 show a second embodiment of the present invention.
7 to 9, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the first embodiment have the same basic configuration, and different points will be mainly described here.

As shown in FIG. 7, the support portion 2 </ b> A in the present embodiment includes an attachment support portion 25 attached to the slab S and a moving support portion 26 supported by the attachment support portion 25.
The attachment support portion 25 is formed in a rectangular tube shape, and is fixed to the slab S so as to be directed to another horizontal direction h2 orthogonal to one horizontal direction h1. As shown in FIG. 9, a slit 25 </ b> S extending over the entire length in the longitudinal direction is formed at the center in the lateral direction of the lower surface of the attachment support portion 25. Further, a pair of long grooves 25 a extending over the entire length in the longitudinal direction is formed on the lower surface of the inner peripheral surface of the attachment support portion 25. The pair of long grooves 25a is formed on both sides of the slit 25S.
The communication unit 4 is provided on the outer surface of the attachment support unit 25.

The movement support part 26 includes a main body part 26a extended in a rectangular tube shape and a connecting part 26b provided on the main body part 26a.
The connecting portion 26b includes a rectangular plate-like support plate portion 261b and a connecting rod 262b provided perpendicular to the extending direction of the support plate portion 261b.
The support plate portion 261b is attached to the upper surface of the outer peripheral surface of the main body portion 26a via a connecting rod 262b. The support plate portion 261b is attached to the center of the main body portion 26a in the longitudinal direction so as to be parallel to the upper surface of the main body portion 26a. A pair of long grooves 2611b are formed on the lower surface of the support plate portion 261b.
The diameter of the connecting rod 262b is smaller than the length dimension of the slit 25S in the horizontal direction h1.

  And the support plate part 261b is distribute | arranged in the attachment support part 25, and each long groove 25a, 2611b is arrange | positioned facing the perpendicular direction. A bearing 24 is disposed in the long grooves 25a and 2611b. That is, the support plate portion 261b is placed on the bearing 24 in the attachment support portion 25, and the connecting rod 262b protrudes outward through the slit 25S, so that the main body portion 26a is attached to the attachment support portion. 25 hangs down below 25.

The main body portion 26a extends in the horizontal direction h1. As shown in FIG. 8, a slit 26S extending over the entire length in the longitudinal direction is formed at the center in the lateral direction of the lower surface of the main body 26a. Furthermore, a pair of long grooves 261a extending over the entire length in the longitudinal direction is formed on the lower surface of the inner peripheral surface of the main body portion 26a. The pair of long grooves 261a are formed on both sides of the slit 26S.
The support body 3 is disposed in the main body 26a, and the bearing 24 is disposed between the long groove 261a and the recess 3a that are arranged to face each other in the vertical direction. That is, the support 3 is placed on the bearing 24 in the main body portion 26a.
In addition, the anotopen 5 exposed below through the slit 26S is provided on the lower surface of the support 3. The reference plate 6 is provided on the lower surface of the inner peripheral surface of the frame portion 9 that surrounds the attachment support portion 25 and the movement support portion 26.

Under such a configuration, when the building K vibrates in the horizontal directions h1 and h2, the attachment support portion 25 and the frame portion 9 vibrate in the horizontal directions h1 and h2, together with the slab S. At this time, since the friction between the bearing 24 and the long grooves 25a and 2611b is small, the movement support portion 26 is fixed at the fixed point P with little displacement in the horizontal direction h2 due to inertia. Similarly, since the friction between the bearing 24 and the long groove 261a and the recess 3a is also small, the moving support portion 26 is fixed at the fixed point P with little displacement in the horizontal direction h1 due to inertia. That is, the reference plate 6 is displaced in a state where the anotopen 5 is fixed to the fixed point P.
Thereby, the absolute displacement of the building K is calculated via the anotopen 5.

  As described above, according to the displacement measuring apparatus 1A in the present embodiment, not only can the same effect as in the first embodiment be obtained, but also the anotopen 5 is fixed in the two directions h1 and h2. In addition, the absolute displacement of the building K can be measured with higher accuracy.

In the present embodiment, the attachment support portion 25 and the movement support portion 26 are in the shape of a rectangular tube, but the present invention is not limited to this, and the shape and the like can be changed as appropriate. For example, as shown in FIG. 10, the attachment support portion 25A and the movement support portion 26B may be formed in a rectangular plate shape. And the movement support part 26B can be mounted on the attachment support part 25A via the bearing 24, and the support body 3 can be mounted on the movement support part 26B via the bearing 24.
In the first and second embodiments, the displacement measuring devices 1 and 1A are provided on the lower surface of the slab S. However, the present invention is not limited to this, and as shown in FIG. May be provided. That is, the support portion 2A can be fixed to the upper surface of the slab S.

Further, although the motion detection unit 7 is composed of a mechanical switch, the present invention is not limited to this, and can be changed as appropriate, such as an electromagnetic switch or an optical switch.
In addition, although the anotopen 5 is driven by the drive signal of the motion detector 7, the present invention is not limited to this, and the anotopen 5 may be always driven.
Further, although the anotopen 5 is provided as the absolute displacement calculation unit, the present invention is not limited to this, and may be, for example, a barcode reader or an optical reading unit using light transmission / reflection.
Further, although it is not always necessary to provide each long groove, it is preferable to provide the long groove in that the support 3 can be stably supported.
In addition, the long groove is not necessarily formed in a curved shape, but the curved shape is preferable in that the fixing position of the support 3 can be made constant.
Moreover, although the curvature of the long groove or the recess is assumed to be smaller than the curvature of the bearing 24, the present invention is not limited to this, and the curvature may be the same.
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

It is a figure which shows 1st Embodiment of the displacement measuring apparatus which concerns on this invention, Comprising: It is explanatory drawing which shows a mode that it installed in the building. It is sectional drawing which shows a mode when the displacement measuring apparatus of FIG. 1 is seen from the horizontal direction h1. FIG. 3 is a cross-sectional view taken along line A-A ′ in FIG. 2. It is explanatory drawing which shows a mode that the long groove 23b of FIG. 2 is curving below. It is explanatory drawing which shows a mode that the support body in this embodiment does not displace with respect to the vibration of a building. It is explanatory drawing which shows a mode that the support body in this embodiment does not displace with respect to the vibration of a building. It is a top view which shows 2nd Embodiment of the displacement measuring device which concerns on this invention. FIG. 8 is a cross-sectional view taken along line B-B ′ of FIG. 7. FIG. 8 is a cross-sectional view taken along line C-C ′ in FIG. 7. It is a perspective view which shows the 1st modification of the displacement measuring device in this embodiment. It is sectional drawing which shows the 2nd modification of the displacement measuring apparatus in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Displacement measuring apparatus 2,2A Support part 3 Support body 3a Recessed part 23b, 261a Long groove
5 Anotopen (absolute displacement calculator)
6 Reference plate (absolute displacement calculator)
23a Bottom surface (support surface)
24 Bearing (spherical body)
25, 25A Mounting support part 26, 26B Movement support part h1, h2 Horizontal direction K building (structure)
v Vertical direction

Claims (3)

A displacement measuring device provided in a structure for measuring the displacement of the structure,
An attachment support attached to the structure ;
A support plate portion supported by the mounting support portion so as to be movable in a first horizontal direction;
A spherical body disposed between the first long groove and the second long groove respectively formed facing the mounting support portion and the support plate portion;
A second horizontal direction that is connected to a connecting rod extending from the support plate portion through a first slit formed between first long grooves disposed in the mounting support portion and is orthogonal to the first horizontal direction. A movable support unit supported so as to be movable,
A support body supported by the movement support portion so as to be movable in the second horizontal direction;
A spherical body disposed between the third long groove and the recess respectively formed facing the moving support part and the support body;
A displacement calculation sensor provided on the lower surface of the support and exposed below the moving support through a second slit, and an inner periphery of the frame of the structure surrounding the mounting support and the moving support An absolute displacement calculating unit that is provided on the lower surface of the surface so as to be opposed to the displacement calculating sensor unit and is horizontally displaceable, and that calculates the absolute displacement of the structure in the horizontal direction; ,
A displacement measuring apparatus comprising: Cross sections of the first long groove to the third long groove and the concave portion are formed in a circular shape,
The displacement measuring apparatus according to claim 1 , wherein a curvature of the cross section is smaller than a curvature of the spherical body. The displacement measuring apparatus according to claim 1, wherein the attachment support part and the movement support part are attached to a lower surface side of the floor of the structure.

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