JP2002071322A - Tool and method for laying linear sensor member and deformation detector for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying tool with which a linear sensor member can be laid and removed easily. SOLUTION: The laying tool 7 is constituted of a pedestal part 16 equipped with a magnet 15 magnetically attracted to a structure, and a fixation part 17 which is composed of a pair of W-shaped plate materials 21 used to regulate and fix an optical fiber 6 laid at the structure in the longitudinal direction. Using the laying tool 7, the linear sensor member, such as the optical fiber 6 or the like, can be laid and removed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laying tool and a method for laying a linear sensor member which are applied when a linear sensor member is laid on a structure to detect a displacement of the structure. Further, the present invention relates to a structure displacement detection device that lays a linear sensor member on a structure and detects displacement of the structure.

[0002]

2. Description of the Related Art In a structure such as a bridge, for example, an inspection for a change in diameter of a joint portion such as a reinforcing portion is performed. In road tunnels and railway tunnels, for example, cracks on the lining surface are regularly inspected. These inspections are performed by periodically performing a visual inspection or the like by an operator, remotely monitoring an electric signal by attaching a strain gauge, or the like. The visual inspection by the operator requires a great deal of labor, and the inspection for attaching the strain gauge requires a large amount of strain gauge, so that the inspection cost is high.

Therefore, in recent years, a strain distribution measuring instrument (BOTDR: Brillouii Optical Time Domain Ref) using an optical fiber has been developed.
lectometry) has been developed. This strain distribution measuring instrument (BOT
DR) measures the amount of strain applied to the optical fiber by analyzing the Brillouin scattered light of the optical fiber, and calculates the frequency shift of the backward Brillouin scattered light, that is, the center frequency of the Brillouin scattered light spectrum from the frequency of the incident light. Focusing on the fact that the subtracted value changes with the tensile stress applied to the optical fiber, that is, the elongation strain of the optical fiber, which is the relative elongation due to the equivalent tensile stress, and measures the strain amount of the optical fiber from the shift in Brillouin frequency Things.

[0004] When a strain distribution measuring instrument (BOTDR) is used to inspect the aging of a joint such as a reinforcing part of a structure such as a bridge, an optical fiber is laid along the joint so as to cross the joint line. Then, an integrated strain and loss pulse tester is connected to one end of the optical fiber, pulse light is incident on the optical fiber, and the distribution of strain in each part of the optical fiber is determined. Measure the strain. Inspection of the displacement due to the aging of the joints such as the reinforcements due to the longitudinal strain generated in the optical fiber. When laying the optical fiber, the optical fiber is fixed along a predetermined place using a U-shaped fixing tool or an adhesive. In addition, a predetermined tension is applied to each fixed section (a sensor section length is provided).

[0005]

[Problems to be Solved by the Invention] Strain distribution measuring instrument (BOTDR)
When an inspection is performed using the optical fiber, the optical fiber is fixed and laid down at the inspection target portion of the structure using a fixing tool or an adhesive. For this reason, an optical fiber fixing operation using a large number of fixtures, a bonding operation using an adhesive, and a curing time for the adhesive are required, and time and labor are required for laying the optical fiber. In addition, when performing maintenance or the like of a structure, it is necessary to remove the laid optical fiber, and it has been necessary to remove the fixture and remove the adhesive. Furthermore, in order to provide a sensor section length, it was necessary to separately perform a fixing operation while measuring displacement or measuring tension with a tensiometer. Also, when measuring continuously or in a distributed manner with one optical fiber, if the measurement object and the displacement are different from the direction in which the measurement objects are arranged, it is necessary to change the direction of the optical fiber, making installation difficult. Had become.

[0006] As described above, when laying or removing an optical fiber from or to a structure, it is impossible to simply carry out the operation, and there are various problems such as a plurality of steps of work.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a laying tool, a laying method of a linear sensor member, and a structure displacement detecting device which can easily lay and remove a linear sensor member such as an optical fiber. The purpose is to provide.

[0008]

According to the present invention, there is provided a laying tool for a linear sensor member for achieving the above object, comprising: a pedestal having a magnet magnetically attached to a structure; And a fixing portion for restricting and fixing the sensor member in the longitudinal direction.

According to another aspect of the present invention, there is provided a linear sensor member laying tool for applying a predetermined tension to a pedestal portion fixed to a structure and a linear sensor member laid on the structure. And a fixing portion that restricts and fixes the linear sensor member in the longitudinal direction in a state where the linear sensor member is sandwiched between at least two curved surface portions formed in the longitudinal direction of the linear sensor member. It is characterized by comprising a template and a fixing member for integrally fixing the pair of W-shaped plates when the linear sensor member is sandwiched between the pair of W-shaped plates.

According to another aspect of the present invention, there is provided a linear sensor member laying tool for laying a linear sensor member on a pedestal having a magnet to be magnetically attached to a structure. And a fixing portion that regulates and fixes the linear sensor member in the longitudinal direction in a state where the tension is applied. The fixing portion has at least two curved surface portions formed continuously in the longitudinal direction of the linear sensor member and sandwiches the linear sensor member. And a fixing member that integrally fixes the pair of W-shaped plates when the linear sensor member is sandwiched between the pair of W-shaped plates.

The pair of W-shaped plate members are supported by a hinge so as to be openable and closable with each other, and the hinge is provided at an end on the free end side in the longitudinal direction of the linear sensor member. Further, the pair of W-shaped plate members are supported by a hinge so as to be openable and closable with each other, and the hinge is provided on a side portion in a direction intersecting the longitudinal direction of the linear sensor member. It is characterized by being formed with different radius. Further, the pair of W-shaped plate members is characterized in that the radius of the curved surface portion on the free end side is reduced. Further, the pair of W-shaped plate members are made of resin, and the hinge and the fixing member are integrally formed. Further, the pedestal provided with the magnet is magnetically attached directly to the member joint of the steel fixed structure. Further, the pedestal provided with the magnet is magnetically attached to a member joint of the fixed structure via a magnetic material. The linear sensor member is an optical fiber. Further, a guide for changing the direction of the linear sensor member is provided on at least one of the longitudinal directions of the linear sensor member of the fixed portion.

In order to achieve the above object, the method of laying a sensor member according to the present invention is characterized in that, when a linear sensor member is fixed to a structure at a number of places from a fixed end to a free end, the sensor member is laid in order from the fixed end. It is characterized in that it is fixed to a structure sequentially while applying tension to the free end side.

Further, the method for laying a sensor member according to the present invention for achieving the above object is characterized in that when a linear sensor member is fixed to a structure at a number of locations from a fixed end to a free end, the sensor is laid on the free end side And a predetermined tension is applied to the entire linear sensor member, and the linear sensor member is sequentially fixed to the structure from the fixed end toward the free end.

Further, the linear sensor member is an optical fiber.

In order to achieve the above object, a structure displacement detecting apparatus according to the present invention restricts, in a longitudinal direction, a pedestal provided with a magnet magnetically attached to the structure and a linear sensor member laid on the structure. And a strain measuring device for measuring the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure by the laying device.

According to another aspect of the present invention, there is provided a structure displacement detecting apparatus in which a predetermined tension is applied to a pedestal portion fixed to a structure and a linear sensor member laid on the structure. A laying tool consisting of a fixing part that regulates and fixes in the longitudinal direction, and a strain measuring instrument that measures the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure with the laying tool The fixing portion includes a pair of W-shaped plate members having at least two curved surface portions formed continuously in the longitudinal direction of the linear sensor member to sandwich the linear sensor member, and a pair of W-shaped plate members sandwiching the linear sensor member. And a fixing member for integrally fixing the pair of W-shaped plate members.

According to another aspect of the present invention, there is provided a structure displacement detecting device for a structure, comprising: a pedestal having a magnet magnetically attached to the structure; and a linear sensor member laid on the structure. Strain measurement that measures the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure by the laying tool consisting of the fixing part that regulates and fixes in the longitudinal direction with the A fixed portion, at least two curved surface portions are formed continuously in the longitudinal direction of the linear sensor member, a pair of W-shaped plate material sandwiching the linear sensor member,
It is characterized by comprising a fixing member for integrally fixing the pair of W-shaped plate members when the linear sensor member is sandwiched between the pair of W-shaped plate members.

The linear sensor member is an optical fiber, and the strain measuring device has a function of evaluating the strain generated in the optical fiber using Brillouin scattered light.

[0019]

FIG. 1 is a schematic view of a bridge provided with a structure displacement detecting device according to an embodiment of the present invention, and FIG. 2 is a schematic view of a structure according to an embodiment of the present invention. A schematic situation in which a displacement detecting device is provided in a tunnel is shown.

As shown in FIG. 1 (a), a rib 3 made of a steel frame material for reinforcement is welded in the longitudinal direction to the back side of the bridge girder 2 of the bridge 1 as a steel structure. As shown in FIG. 1B showing the back side of the bridge girder 2, a displacement detecting device 5 is attached along a welding line 4 of the rib 3. The displacement detecting device 5 includes an optical fiber 6 as a linear sensor member and a welding wire 4.
Is laid along the welding line 4 so as to cross the optical fiber 6, and the optical fiber 6 is fixed by a number of laying tools 7 while being guided at a right angle by the guide 7a. One end of the optical fiber 6 is connected to a strain measuring device 8 that evaluates the strain generated in the optical fiber 6 using Brillouin scattered light, and evaluates the strain generated in the optical fiber 6 to change the welded portion over time. Distortion such as poor connection, that is, the condition of fixing the rib 3 to the bridge girder 2 is measured.

As shown in FIG. 2A, a displacement detecting device 5 is mounted on the inner wall surface of a tunnel 11 as a structure. As shown in FIG. 2B showing a cross section of the tunnel 11, the displacement detecting device 5 has an optical fiber 6 as a linear sensor member along a circumferential direction orthogonal to the axial direction of the tunnel 11.
Is laid. The optical fiber 6 is fixed by a number of laying tools 7. The optical fiber 6 is continuously provided in series in the longitudinal direction of the tunnel 11, and a strain measuring device 8 for evaluating strain generated in the optical fiber 6 using Brillouin scattered light is connected to one end of the optical fiber 6. ing. By evaluating the strain generated in the optical fiber 6, a strain such as a lining deformation due to a change in the diameter of the inner wall surface of the tunnel 11 is measured.

It should be noted that the linear sensor member is not limited to the optical fiber 6, and other sensor members such as a sensor having a strain gauge formed linearly can be used. In this case, a device that evaluates distortion using an electric signal or the like is used as the distortion measuring device. The structures include bridge 1 and tunnel 1
The displacement detection device 5 can be attached to any structure, not limited to one.

The laying tool 7 will be described with reference to FIGS. 3 shows a perspective view of the laying tool 7 according to one embodiment of the present invention, FIG. 4 shows a side view of the laying tool 7, FIG. 5 shows a front view of the laying tool 7, and FIG. It is.

As shown in the figure, the laying tool 7 includes, for example, a magnet 15 which is directly fixed (magnetically attached) to the welded portion of the rib 3 (see FIG. 1) of the bridge girder 2 (see FIG. 1) by magnetic force. Base 16
Is provided. When the laying tool 7 is applied to the tunnel 11, the magnet 15 of the pedestal portion 16 is attached by driving a bolt or a pin made of a magnetic material, or the magnet 15 of the pedestal portion 16 is applied by applying a putty of a magnetic agent. Just attach it. When the putty of the magnetic agent is applied, the pedestal portion 16 can be securely magnetically attached to the structure even if the surface is uneven, such as a painted surface. The pedestal portion 16 is provided with a fixing portion 17. The fixing portion 17 regulates the optical fiber 6 in the longitudinal direction in a state where an initial tension (predetermined tension) is applied to the optical fiber 6 laid on the structure. Fixed.

That is, the fixing portion 17 is formed by a pair of W-shaped plate members 21.
Are provided to be freely openable and closable by a hinge 22, and the hinge 22 is provided at an end of the optical fiber 6 on the free end side in the longitudinal direction. The optical fiber 6 is sandwiched between a pair of W-shaped plate members 21, and the pair of W-shaped plate members 21 are integrally fixed by a clip 24 as a fixing member. As shown in FIG. 6, since the hinge 22 is provided at the longitudinal end of the optical fiber 6, the hinge 22 is offset to one side (the lower side in the figure) in the width direction (vertical direction in the figure). It is in a state. This prevents the hinge 22 from hindering the optical fiber 6 from being pinched by the pair of W-shaped plate members 21.

In the W-shaped plate member 21, two curved surface portions 23a and 23b are formed continuously in the longitudinal direction of the optical fiber 6, and as shown in FIG. It is shaped. A groove 25 for guiding the optical fiber 6 is formed on the inner side surface of the W-shaped plate 21 in the longitudinal direction.
The diameter of the optical fiber 5 is slightly smaller than the diameter of the optical fiber 6 when the W-shaped plate 21 is closed.
A frictional force is generated. The W-shaped plate 21
It is also possible to attach a member such as rubber, which increases friction, to the inner side surface. In addition, the dimensions of the three R portions are configured to be equal, and are set to dimensions that do not cause transmission loss, breakage, and the like in the optical fiber 6 (for example, about R30 mm).

By arranging the optical fiber 6 between the pair of W-shaped plate members 21 and closing the W-shaped plate member 21, first, the optical fiber 6 is sandwiched by the curved surface portion 23a on the free end side, and the longitudinal direction is fixed. Further, by closing the W-shaped plate member 21 and holding the optical fiber 6 between the pair of W-shaped plate members 21, tension is applied to the optical fiber 6 by the curved surface portion 23b on the fixed end side.
In this state, the pair of W-shaped plate members 21 are integrated by the clip 24, whereby the optical fiber 6 is regulated and fixed in the longitudinal direction in a state where the initial tension (predetermined tension) is applied.

As the material of the pair of W-shaped plate members 21, for example, a resin can be used. When resin is used, in addition to using the clip 24 as a fixing member, a claw member is integrally formed on one W-shaped plate member 21, and a locking hole is integrally formed on the other W-shaped plate member 21, and when closed. It is also possible to adopt a configuration in which the claw member is locked in the locking hole. Also, the hinges 22 can be provided by integrally molding the ends of the pair of W-shaped plate members 21 with a thin plate portion by using resin.

A method of laying the optical fiber 6 using the laying tool 7 having the above configuration will be described with reference to FIG. FIG. 7 shows an explanation of the laying state by the laying method of the sensor member according to the embodiment of the present invention.

As shown in the figure, a hinge 22 is attached to the free end 6a of the optical fiber 6 at the position where the optical fiber 6 is fixed (left side in the figure).
Laying tool 7 (laying tool)
7a, 7b, 7c, 7d) are arranged and attached by the magnet 15. The W-shaped plate 21 is closed in order from the laying tool 7a arranged near the fixed end 6b of the optical fiber 6, and the optical fiber 6 is fixed.

First, with the laying tool 7a near the fixed end 6b,
The optical fiber 6 is clamped in the longitudinal direction by the curved surface portion 23a on the 6a side, and then tension is applied to the optical fiber 6 by the curved surface portion 23b on the fixed end 6b side.
Then, the pair of W-shaped plate members 21 are integrated. As a result, the optical fiber 6 is fixed with a predetermined tension applied between the fixed end 6b and the first laying tool 7.

Laying tools 7b, 7c, 7d adjacent to the free end 6a in order
By closing the W-shaped plate 21 of each of the laying tools 7, the fixing and the application of tension are performed in each laying tool 7, and the optical fiber 6
Fixed to Optical fiber 6 with laying tool 7d near free end 6a
Is fixed, the optical fiber 6 is fixed with a predetermined tension applied to the optical fiber 6 between the fixed end 6b and the laying tool 7a and between the laying tools 7b, 7c, and 7d. Thereby, the optical fiber 6 is laid on the structure.

Therefore, the above-mentioned laying tool 7 can be attached to a predetermined position by magnetically attaching it to a steel structure via a magnet. Can be easily removed. In addition, the above-described laying device 7 can simultaneously fix the optical fiber 6 and apply tension by closing it, thereby facilitating the work of laying the optical fiber 6 and assembling the scaffold once, thereby achieving the structure of the laying device 7. Fixing to an object and fixing of the optical fiber 6 can be easily performed.

A laying device according to another embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a perspective view of the laying tool according to the second embodiment of the present invention, FIG. 9 is a side view of the laying tool, and FIG. 10 is a plan view showing a state where the optical fiber 6 is laid using the laying tool. . The same components as those of the laying tool 7 are denoted by the same reference numerals, and redundant description is omitted.

As shown in FIGS. 8 and 9, the laying tool 27
In addition to the configuration of the laying tool 7 described above, guides 28 are provided on the pedestal portion 16 on both sides of the W-shaped plate 21 of the fixing portion 17. That is, the laying tool 7 and the guide 7 in FIG.
a is integrally formed. Guide 28
Is for guiding the direction of the optical fiber 6 sandwiched between the W-shaped plate members 21 so as to change the direction to a substantially right angle. As shown in FIG. 10, by arranging the laying tools 27 alternately with the guide 28 being reversed, the optical fiber 6 can be laid in a zigzag state. For example, the bridge girder shown in FIG. This is effective when applied to a case where an optical fiber 6 is laid along the welding line 4 across the welding line 4 of the rib 3 on the back side of the second rib 2. Note that the guide 28 may be provided on one side of the W-shaped plate 21.

A laying tool according to still another embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a perspective view of the laying tool according to the third embodiment of the present invention, and FIG. 12 is a side view of the laying tool. The same components as those of the laying tool 7 are denoted by the same reference numerals, and redundant description is omitted.

As shown in the figure, the laying tool 31 differs from the laying tool 7 in the shape of the pair of W-shaped plate members 21. That is, the pedestal portion 16 is provided with the fixing portion 32, and the fixing portion 32 is provided with a pair of W-shaped plate members 33 that can be opened and closed by the hinge 34. The hinge 34 is provided in a direction crossing the longitudinal direction of the optical fiber 6, that is, on the side of the W-shaped plate 33. In the W-shaped plate 33, two curved portions 33a and 33b having different curvatures are continuously formed in the longitudinal direction of the optical fiber 6, and three R portions are continuously formed to form a W shape as a whole. I have. The curved surface portion 33a on the free end side (left side in the drawing) is the curved surface portion 33b on the fixed end side (right side in the drawing).
It is formed deeper (formed with a small radius).

By disposing the optical fiber 6 between the pair of W-shaped plate members 33 and closing the W-shaped plate member 33, the optical fiber 6 is clamped by the curved surface portion 33a on the free end side, and the longitudinal direction is regulated and fixed. At the same time, the optical fiber 6 is clamped by the curved surface portion 33b on the fixed end side and tension is applied. In this state, by unifying the pair of W-shaped plate members 33 with a clip (not shown), the optical fiber 6 is regulated and fixed in the longitudinal direction in a state where an initial tension (predetermined tension) is applied.

In the laying tool 31 having the above structure, the hinge 34 is
Since it is arranged on the side of the template 33, the width of the W-shaped plate 33 can be reduced. In addition, FIG.
The guide 28 shown in FIG. 9 can be provided, and the fixing member and the hinge 34 can be integrally formed by molding the W-shaped plate 33 with resin.

In each of the above embodiments, even when the laying tools 7, 27, and 31 without the magnet 15 are used, the fixing of the optical fiber 6 and the application of the tension can be performed at the same time. The work of laying the fiber 6 can be easily performed. Also, in the laying tools 7, 27 and 31,
Although the description has been given of the one provided with the fixing part capable of fixing the optical fiber 6 and applying the tension at the same time, it is also possible to adopt a configuration in which the fixing part only fixes the optical fiber 6 and mounts the laying tool by the magnet 15. It is. in this case,
Installation and removal of laying tools can be easily performed.

A method of laying the optical fiber 6 using a laying tool that only fixes the optical fiber 6 at the fixing portion will be described with reference to FIG. FIG. 13 shows an explanation of a laying state by a laying method of a sensor member according to another embodiment of the present invention.

As shown in the figure, laying tools 41a, 41b, 41c and 41d are arranged in a state where the fixing portion is opened at a fixing portion of the optical fiber 6, and the base is attached to the structure by a magnet. The weight 40 is attached to the free end 6a of the optical fiber 6a.
A predetermined tension is applied to the entirety of the optical fiber 6, and the laying tools 41b, 41c, 41 are shifted from the laying tool 41a disposed near the fixed end 6b of the optical fiber 6.
The optical fiber 6 is fixed by the fixing part in the order of d.
The means for applying a predetermined tension to the entire optical fiber 6 is not limited to the weight 40, and various tension applying mechanisms can be applied.

Each of the laying tools 41 is fixed by sequentially fixing the optical fibers 6 with a laying tool on the fixed end side of the optical fiber 6 in a state where a predetermined tension is applied to the entire optical fiber 6.
The optical fiber 6 is laid on the structure without adjusting the tension at a, 41b, 41c and 41d.

The laying tool for the optical fiber 6 and the method for laying the optical fiber 6 according to the above-described embodiment can easily lay and remove the optical fiber 6. In addition, the structure displacement detection device according to the above-described embodiment example can be used to easily lay and remove the optical fiber 6 in a structure such as a welded portion of the rib 3 of the bridge 1 or an inner wall surface of the tunnel 11. Displacement can be detected.

[0045]

According to the present invention, there is provided a linear sensor member laying tool for fixing a linear sensor member laid on a structure in a longitudinal direction with a pedestal portion having a magnet magnetically attached to the structure. Since it is composed of the fixing portion, it is possible to provide a laying tool that can easily lay and remove the linear sensor member such as an optical fiber.

The linear sensor member laying tool according to the present invention has a pedestal portion fixed to a structure, and a linear sensor member laid on the structure, which is regulated in a longitudinal direction with a predetermined tension applied. And a fixing part for fixing.
At least two curved surface portions are formed continuously in the longitudinal direction of the linear sensor member, and a pair of W-shaped plate members that sandwich the linear sensor member, and a pair of W-shaped plate members that sandwich the linear sensor member between the pair of W-shaped plate members. A fixing member for integrally fixing the W-shaped plate member, so that the linear sensor member can be fixed by the fixing portion under a predetermined tension by sandwiching the linear sensor member with the W-shaped plate member. Tool.

The laying tool for a linear sensor member according to the present invention comprises a pedestal provided with a magnet to be magnetically attached to a structure, and a linear sensor member laid on the structure with a predetermined tension applied thereto. It consists of a fixing part that regulates and fixes in the longitudinal direction,
The fixing portion has a pair of W-shaped plate members having at least two curved surface portions formed continuously in the longitudinal direction of the linear sensor member and sandwiching the linear sensor member, and a pair of W-shaped plate members sandwiching the linear sensor member. In this case, a pair of W-shaped plate members are integrally fixed to each other, so that a linear sensor member such as an optical fiber can be laid and removed easily. It is possible to provide a laying tool which can fix the linear sensor member by the fixing portion in a state where the tension is applied.

According to the method of laying the linear sensor member of the present invention, when the linear sensor member is fixed to the structure at a number of places from the fixed end to the free end, the linear sensor member is sequentially directed to the free end from the fixed end. The linear sensor member is fixed to the structure while applying a predetermined tension, so that the linear sensor member can be easily fixed in a state where a predetermined tension is applied.

Further, according to the method of laying a linear sensor member of the present invention, when the linear sensor member is fixed to a structure at a large number of places from a fixed end to a free end, the linear sensor member is laid on the free end side. A predetermined tension is applied to the entire structure, and the linear sensor member is fixed to the structure sequentially from the fixed end toward the free end, so that the linear sensor member can be easily fixed with the predetermined tension applied. .

The apparatus for detecting displacement of a structure according to the present invention comprises a pedestal portion provided with a magnet for magnetically attaching to the structure, and a fixing portion for regulating and fixing a linear sensor member laid on the structure in the longitudinal direction. Since the laying tool and the strain measuring device that measures the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure by the laying device, the laying of the linear sensor member such as an optical fiber and It is possible to provide a displacement detection device provided with an installation tool that can be easily removed.

Further, the structure displacement detecting device of the present invention comprises:
A laying device comprising a pedestal portion fixed to the structure and a fixing portion that regulates and fixes the linear sensor member laid on the structure in the longitudinal direction while applying a predetermined tension, and It consists of a strain measuring device that measures the displacement of the structure by evaluating the strain of the laid linear sensor member, and the fixed portion has at least two curved surface portions formed continuously in the longitudinal direction of the linear sensor member. A pair of W-shaped plate members sandwiching the linear sensor member, and a fixing member that integrally fixes the pair of W-shaped plate members when the linear sensor member is sandwiched between the pair of W-shaped plate members. By sandwiching the linear sensor member with the above, it is possible to provide a displacement detection device including a laying tool that can fix the linear sensor member by the fixing portion in a state where a predetermined tension is applied.

Further, the structure displacement detecting device of the present invention
A laying device comprising a pedestal portion provided with a magnet to be magnetically attached to the structure and a fixing portion for fixing the linear sensor member laid on the structure in a longitudinal direction while applying a predetermined tension, and a laying device And a strain measuring device that measures the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure, and the fixed portion has at least two curved surface portions in the longitudinal direction of the linear sensor member. Since a pair of W-shaped plate members formed continuously and sandwiching the linear sensor member, and a fixing member that integrally fixes the pair of W-shaped plate members when the linear sensor member is sandwiched between the pair of W-shaped plate members, The linear sensor member such as an optical fiber can be easily laid and removed, and the linear sensor member is fixed by the fixing portion in a state where a predetermined tension is applied by sandwiching the linear sensor member with a W-shaped plate. With laying tools It is possible to position detection apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view in which a structure displacement detection device according to an embodiment of the present invention is provided on a bridge.

FIG. 2 is a schematic explanatory diagram in which a structure displacement detection device according to an embodiment of the present invention is provided in a tunnel.

FIG. 3 is a perspective view of a laying tool 7 according to an embodiment of the present invention.

FIG. 4 is a side view of the laying tool 7;

FIG. 5 is a front view of the laying tool 7;

FIG. 6 is a plan view of the laying tool 7;

FIG. 7 is an explanatory view of a laying state by a laying method of a sensor member according to an embodiment of the present invention.

FIG. 8 is a perspective view of a laying tool according to a second embodiment of the present invention.

FIG. 9 is a side view of the laying tool.

FIG. 10 is a plan view showing a state where an optical fiber 6 is laid using a laying tool.

FIG. 11 is a perspective view of a laying tool according to a third embodiment of the present invention.

FIG. 12 is a side view of the laying tool.

FIG. 13 is an explanatory view of a laying state by a laying method of a sensor member according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge 2 Bridge girder 3 Rib 4 Welding line 5 Displacement detector 6 Optical fiber 7, 27, 31 Laying tool 8 Strain measuring instrument 11 Tunnel 15 Magnet 16 Pedestal 17, 32 Fixing part 21, 33 W-shaped plate 22, 34 Hinge 23 Curved surface Part 28 guide 40 weight

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D055 LA13 LA16 2D059 GG39 2F065 AA18 AA65 BB05 CC40 DD00 FF41 LL02 PP22 QQ44 UU03 2H038 CA63

Claims (18)

[Claims] 1. A pedestal portion having a magnet for magnetically attaching to a structure, and a fixing portion for regulating and fixing a linear sensor member laid on the structure in a longitudinal direction. For laying linear sensor members. 2. A pedestal portion fixed to a structure, and a fixing portion for regulating and fixing the linear sensor member laid on the structure in a longitudinal direction while applying a predetermined tension, the fixing portion comprising: When at least two curved surface portions are formed continuously in the longitudinal direction of the linear sensor member and a pair of W-shaped plate members sandwiching the linear sensor member, when the linear sensor member is sandwiched by a pair of W-shaped plate members A laying tool for a linear sensor member, comprising: a fixing member for integrally fixing a pair of W-shaped plate members. 3. A pedestal portion provided with a magnet to be magnetically attached to a structure, and a fixing portion for regulating and fixing the linear sensor member laid on the structure in a longitudinal direction with a predetermined tension applied. The fixing portion includes a pair of W-shaped plate members having at least two curved surface portions continuously formed in the longitudinal direction of the linear sensor member and sandwiching the linear sensor member, and a pair of W-shaped plate members. A laying tool for a linear sensor member, comprising: a fixing member for integrally fixing a pair of W-shaped plate members when sandwiched. 4. The pair of W-shaped plate members according to claim 2, wherein the pair of W-shaped plate members are supported by a hinge so as to be openable and closable with each other, and the hinge is provided at an end on the free end side in the longitudinal direction of the linear sensor member. A laying tool for a linear sensor member, which is provided. 5. The pair of W-shaped plate members according to claim 2, wherein the pair of W-shaped plate members are supported by a hinge so as to be openable and closable with each other, and the hinge is provided on a side portion of the linear sensor member in a direction intersecting the longitudinal direction. A laying tool for a linear sensor member, wherein each curved surface of a pair of W-shaped plate members is formed with a different radius. 6. The laying tool for a linear sensor member according to claim 5, wherein the pair of W-shaped plate members have a small radius of curvature at the free end side. 7. The linear sensor member according to claim 4, wherein the pair of W-shaped plate members is made of resin, and the hinge and the fixing member are integrally formed. Laying tools. 8. The method according to claim 1, wherein the information processing apparatus comprises:
The laying tool for a linear sensor member according to any one of claims 1 to 3, wherein the pedestal portion provided with the magnet is directly magnetically attached to a member joint of the steel fixed structure. 9. The method according to claim 1, wherein the first and second to third aspects are the same.
The laying tool for a linear sensor member according to any one of the preceding claims, wherein the pedestal portion provided with the magnet is magnetically attached to a member joint of the fixed structure via a magnetic material. 10. The laying tool for a linear sensor member according to claim 1, wherein the linear sensor member is an optical fiber. 11. The fixing device according to claim 1, wherein a guide for changing the direction of the linear sensor member is provided on at least one of the longitudinal directions of the linear sensor member of the fixed portion. For laying linear sensor members. 12. When a linear sensor member is fixed to a structure at a number of places from a fixed end to a free end and laid, the linear sensor member is sequentially fixed to the structure while applying tension from the fixed end toward the free end. A method of laying a sensor member. 13. When a linear sensor member is fixed to a structure at a number of locations from a fixed end to a free end and laid, a predetermined tension is applied to the entire linear sensor member at the free end, and A method of laying a linear sensor member, wherein the linear sensor member is sequentially fixed to a structure from a free end side. 14. The method for laying a linear sensor member according to claim 12, wherein the linear sensor member is an optical fiber. 15. A laying tool comprising a pedestal portion provided with a magnet to be magnetically attached to the structure, a fixing portion for regulating and fixing a linear sensor member laid on the structure in a longitudinal direction, and the structure by the laying tool. A strain measuring device for measuring a displacement of the structure by evaluating a strain of the linear sensor member laid on the structure. 16. A laying tool comprising a pedestal portion fixed to a structure and a fixing portion for regulating and fixing the linear sensor member laid on the structure in a longitudinal direction while applying a predetermined tension, and laying. And a strain measuring device that measures the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure with the fixture. The fixed portion has at least two curved surface portions in the longitudinal direction of the linear sensor member. A pair of W-shaped plate members which are formed continuously and sandwich the linear sensor member, and a fixing member which integrally fixes the pair of W-shaped plate members when the linear sensor member is sandwiched between the pair of W-shaped plate members. An apparatus for detecting a displacement of a structure. 17. An installation comprising a pedestal portion provided with a magnet to be magnetically attached to a structure and a fixing portion for regulating and fixing the linear sensor member laid on the structure in a longitudinal direction while applying a predetermined tension. And a strain measuring device that measures the displacement of the structure by evaluating the strain of the linear sensor member laid on the structure by the laying tool. The fixed portion has at least two curved surface portions that are linear sensors. A pair of W-shaped plate members formed continuously in the longitudinal direction of the member and sandwiching the linear sensor member, and a fixing for integrally fixing the pair of W-shaped plate members when the linear sensor member is sandwiched between the pair of W-shaped plate members. An apparatus for detecting displacement of a structure, comprising: a member; 18. The linear sensor member according to claim 15, wherein the linear sensor member is an optical fiber, and the strain measuring device evaluates a strain generated in the optical fiber using Brillouin scattered light. A structural displacement detecting device having a function.