JP2016217982A - Displacement measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a displacement measuring device capable of reliably measuring the displacement amount of a structure.SOLUTION: A displacement measuring device for measuring a relative displacement amount between a floor part 13 and a beam part 14 of a base-isolated structure 11 having the floor part (first structure part) 13 and the beam part (second structure part) 14 includes: a moving part 2 movably installed along a floor surface (installation plane) 15 provided on the floor part 13; a fixing part 3 fixed to the beam part 14; and first and second displacement measuring parts (displacement measuring means) 5, 6 which are installed on at least one of the moving part 2 and the fixing part 3 and are capable of measuring a relative displacement amount between the floor part 13 and the beam part 14. The moving part 2 and the fixing part 3 are restricted in a relative movement in the direction along the floor surface 15, but permitted in a relative movement in the direction orthogonal to the floor surface 15. The displacement measuring device further includes isolation prevention means 4 for preventing the isolation between the moving part 2 and the floor surface 15 by being supported by the fixing part 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a displacement measuring device for measuring the amount of displacement of a structure when an earthquake or the like occurs.

2. Description of the Related Art Conventionally, a displacement measuring device that measures the amount of displacement of a structure such as a building when an earthquake occurs has been used.
For example, Patent Document 1 includes a fixed portion fixed to a structure, a movable portion that can be relatively displaced in the horizontal direction with the fixed portion, and a sensor that measures a relative displacement amount between the fixed portion and the movable portion. A displacement measuring device that calculates an absolute displacement amount of a structure from a measured relative displacement amount between a fixed portion and a moving portion is disclosed (for example, see Patent Document 1).

JP 2010-019748 A

  In the displacement measuring device disclosed in Patent Document 1, the sensor is configured to measure the horizontal relative displacement amount between the fixed portion and the moving portion. However, if the fixed portion and the moving portion are relatively displaced in a direction other than the horizontal direction such as the vertical direction, there is a possibility that the sensor cannot accurately measure the relative displacement amount in the horizontal direction between the fixed portion and the moving portion.

  Then, an object of this invention is to provide the displacement measuring apparatus which can measure the displacement amount of a structure reliably.

  In order to achieve the above object, a displacement measuring apparatus according to the present invention measures a relative displacement amount between a first structure portion and a second structure portion of a structure having a first structure portion and a second structure portion. In the displacement measuring device, a moving unit installed movably along an installation surface provided in the first structure unit, a fixed unit fixed to the second structure unit, and the moving unit and the fixed unit Displacement measuring means installed at least on one side and capable of measuring a relative displacement amount between the first structure part and the second structure part, wherein the moving part and the fixed part are along the installation surface. A separation preventing means for restraining the separation between the moving portion and the installation surface supported by the fixed portion, the relative movement in the direction being restricted and the relative movement in the direction intersecting the installation surface is allowed; Furthermore, it is characterized by having.

In the present invention, since the relative movement in the direction along the installation surface is constrained between the moving unit and the fixed unit, the moving unit moves along the installation surface together with the fixed unit. For this reason, the relative displacement in the direction along the installation surface between the first structure portion and the second structure portion is measured by measuring the relative displacement in the direction along the installation surface between the moving portion and the installation surface by the displacement measuring means. Can be measured.
In addition, since the moving part and the fixed part are allowed to move relative to each other in the direction intersecting the installation surface, the displacement measuring device measures the relative displacement amount in the direction intersecting the installation surface between the moving part and the fixed part. By doing so, it is possible to measure the relative displacement in the direction intersecting the installation surface of the first structure portion and the second structure portion.
In the present invention, since the moving unit is prevented from moving away from the installation surface by being provided with the separation preventing means that is supported by the fixed unit and prevents the moving unit and the installation surface from separating, the moving unit is installed on the installation surface. The relative displacement amount between the first structure portion and the second structure portion cannot be measured by separating from the first structure portion, and the relative displacement amount between the first structure portion and the second structure portion can be reliably measured.

  In the displacement measuring apparatus according to the present invention, the first structure portion is disposed below the second structure portion, the installation surface is a horizontal surface facing the second structure portion, and the moving portion Is a vertical direction connecting the first moving plate portion, the second moving plate portion disposed above the first moving plate portion, and the first moving plate portion and the second moving plate portion. And the fixed portion includes a fixed plate portion disposed between the first movable plate portion and the second movable plate portion, the fixed plate portion and the second fixed plate portion. A fixed column portion extending in a vertical direction that connects the structure portion, and the movable column portion is inserted into a hole formed in the fixed plate portion and is perpendicular to the fixed plate portion. The fixed column portion is inserted into a hole formed in the second moving plate portion and is in a vertical direction with respect to the second moving plate portion. Is movable, the separation preventing means preferably comprises a tension spring for connecting the fixing plate portion and the second movable plate portion.

The movable column portion is movable in the vertical direction relative to the fixed plate portion while being inserted into the hole of the fixed plate portion, and the fixed column portion is inserted into the hole portion of the second movable plate portion. (2) Since the movable plate portion can be relatively moved in the vertical direction, the relative displacement in the vertical direction between the movable portion and the fixed portion can be allowed while restraining the relative displacement in the horizontal direction between the movable portion and the fixed portion. . Accordingly, the horizontal relative displacement between the first structure portion and the second structure portion can be measured by measuring the horizontal relative displacement amount between the moving portion and the installation surface, and the moving portion and the fixed portion can be measured. By measuring the vertical relative displacement amount in the vertical direction, the relative displacement amount between the first structure portion and the second structure portion can be measured.
The separation preventing means is a tension spring that connects the second moving plate portion and the fixed plate portion, so that if the moving portion moves away from the installation surface due to the vibration of the structure or the like, Since it is returned downward by the restoring force of the spring, it is possible to prevent the moving part from leaving the installation surface.

In the displacement measuring apparatus according to the present invention, a plurality of the movable column portions are arranged at predetermined intervals in the circumferential direction around the axis of the fixed column portion, and a plurality of the movable columns are disposed on the fixed plate portion. It is preferable that a plurality of the hole portions through which the respective portions are inserted are formed, and the tension springs are disposed at intervals between the moving column portions adjacent in the circumferential direction.
By setting it as such a structure, the horizontal relative displacement of a moving part and a fixing | fixed part can be restrained in several places. Further, since the tension springs are arranged at intervals between the moving column portions adjacent in the circumferential direction, it is possible to reliably prevent the moving portions from being separated from the installation surface by the restoring force of each tension spring.

Further, in the displacement measuring apparatus according to the present invention, the separation preventing means is provided on the second moving plate portion and is capable of locking one end portion of the tension spring at each of a plurality of different positions in the horizontal direction. It is preferable to have one locking portion and a second locking portion that is provided on the fixed plate portion and can lock the other end of the tension spring at each of a plurality of different positions in the horizontal direction.
By setting it as such a structure, while being able to install a tension spring in arbitrary positions, the expansion-contraction direction of a tension spring can be adjusted. Thereby, the position which urges | biases a moving part to an installation surface with a tension | pulling spring, and the magnitude | size of urging | biasing force can be adjusted.

In the displacement measuring apparatus according to the present invention, the displacement measuring device further includes a position detecting unit that detects a position of the moving unit on the installation surface, and the position detecting unit is provided on the moving unit, and a line on the installation surface is detected. A first detection unit for detecting; a second detection unit for detecting an index provided on the installation surface; and the first detection unit provided at a predetermined distance from the first detection unit. And a calculation processing unit that calculates a position on the measurement surface based on the detection result of the second detection unit and the detection result of the second detection unit, and a distance between the representative point of the index and a specific point on the line, The distance may be determined according to the predetermined distance.
By setting it as such a structure, the positional accuracy of a displacement measuring apparatus can be improved.

  According to the present invention, the displacement amount of the structure can be reliably measured.

It is a side view showing an example of a displacement measuring device by a 1st embodiment of the present invention. It is a bottom view of FIG. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is a flowchart explaining a displacement amount calculation method. It is a side view which shows an example of the displacement measuring apparatus by 2nd Embodiment of this invention. It is the figure which saw through the 1st movement board part in the DD sectional view taken on the line of FIG. It is a figure explaining the line drawn on the permanent magnet and irradiation plate which were provided in the irradiation plate. It is a figure explaining a mode that the displacement measuring device has been arrange | positioned in the positive position (origin) in the X direction and the Y direction. (A) is a figure explaining a mode that a displacement measuring device has been arranged at the right position in the X direction, and (b) shows a state where it is arranged at the right position in the X direction at a different position in the Y direction. FIG. (A) is a figure explaining a mode that the displacement measuring device is arrange | positioned in the normal position in the Y direction, (b) is a position different from (a) in the X direction, and the displacement measuring device is arranged in the positive position in the Y direction. It is a figure explaining a mode. It is a figure explaining a mode that the 1st-3rd photo reflector is each arrange | positioned on the line, but the displacement measuring apparatus is not arrange | positioned in the normal position (origin) in X direction and Y direction.

(First embodiment)
Hereinafter, a displacement measuring apparatus according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the displacement measuring apparatus 1 </ b> A according to the first embodiment is installed in a seismic isolation layer 12 of a seismic isolation structure (structure) 11, and a floor portion (first structure) on the lower side of the seismic isolation layer 12. Portion) 13 and the upper side beam portion (second structure portion) 14 can be measured.
The displacement measuring apparatus 1A includes a moving unit 2 installed so as to be movable in the horizontal direction along the floor surface (installation surface) 15 of the floor unit 13, a fixed unit 3 fixed to the beam unit 14, and a fixed unit 3. The separation prevention means 4 that prevents the moving unit 2 from being separated from the floor surface 15 by being supported, the floor unit 13 and the beam unit 14 installed in the moving unit 2 in a direction (horizontal direction) along the floor surface 15. The three first displacement measuring parts (displacement measuring means) 5, 5, 5, each capable of measuring the relative displacement amount of each, and the relative displacement amount of the floor part 13 and the beam part 14 installed in the fixed part 3 in the vertical direction Of the three second displacement measuring units (displacement measuring means) 6, 6, 6 and the three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 respectively. The amount of displacement measured by the switch unit 7 for driving and the three first displacement measuring units 5, 5, and 5 and the three second variations are measured. A processing unit (not shown) that processes data of the amount of displacement measured by each of the measuring units 6, 6 and 6, and three first displacement measuring units 5, 5, 5 and three second displacement measuring units 6, 6 6 and 6 (not shown) capable of supplying power.

The moving unit 2 is configured to be movable on the irradiation plate 9 provided on the floor 15.
The irradiation plate 9 is made of a plate material such as an aluminum composite plate, a steel plate, or an acrylic plate, and is fixed to the floor 15 so that the upper surface is a horizontal plane. The irradiation plate 9 is provided in a wider area than the predicted moving area of the moving unit 2 due to earthquake vibration or the like.

  As shown in FIGS. 1 to 5, the moving unit 2 includes a first moving plate unit 21 (see FIGS. 1 to 3) and three moving column units 22, 22, 22 standing on the first moving plate unit 21. (See FIG. 1 and FIGS. 3 to 5), a second moving plate portion 23 (see FIGS. 1 and 5) fixed to the upper part of the three moving column portions 22, 22, and 22, and a first moving plate portion 21. Are connected to the first moving plate portion 21, the three moving column portions 22, 22, 22 and the second moving plate portion 23 so as to be movable along the upper surface of the irradiation plate 9 (see FIG. 1). 24, 24, 24 (see FIG. 1 and FIG. 2).

  The first moving plate portion 21 is formed in a substantially equilateral triangular shape in plan view with the plate surface facing the vertical direction. The first moving plate portion 21 is formed with a hole portion 21a having a substantially circular shape in a plan view that penetrates in a vertical direction in a central portion in a plan view. In addition, three first displacement measuring units 5, 5, 5 and three moving mechanisms 24, 24, 24 are arranged below the first moving plate portion 21. The moving mechanisms 24, 24, 24 are in contact with the floor surface 15 (see FIG. 1), and the first moving plate portion 21 and the first displacement measuring portions 5, 5, 5 are separated from the floor surface 15.

  The three moving column portions 22, 22, 22 are each formed of a channel material extending in the vertical direction and having a substantially C-shaped horizontal cross section. The three moving column portions 22, 22, 22 are arranged with an equal interval in the circumferential direction around the center 21 c in the plan view of the first moving plate portion 21 with respect to the first moving plate portion 21. The three movable column portions 22, 22, and 22 are respectively arranged in the vicinity of the three corner portions 21b, 21b, and 21b of the substantially equilateral triangle in the plan view of the first movable plate portion 21, and the corner portions 21b, 21b, and 21b are respectively disposed. And a line connecting the center 21 c of the first moving plate portion 21.

The second moving plate portion 23 is formed so that the outer shape in plan view is substantially the same as that of the first moving plate portion 21. As for the 2nd movement board part 23, three movement pillar parts 22,22,22 are being fixed to the lower surface.
The second moving plate portion 23 is formed with a hole portion 23a having a substantially circular shape in plan view that penetrates in the vertical direction at the center portion in plan view. The hole 23a is configured such that the fixed column portion 32 of the fixed portion 3 is inserted therethrough.

  Each of the three moving mechanisms 24, 24, 24 has a sliding plate portion 241 that can slide on the upper surface of the irradiation plate 9, and a connecting portion 242 that connects the sliding plate portion 241 to the lower surface of the first moving plate portion 21. doing. The sliding plate portion 241 is configured to slide on the upper surface of the irradiation plate 9 with the lower surface in surface contact with the upper surface of the irradiation plate 9. In the present embodiment, a Teflon (registered trademark) sheet is attached to the lower surface of the sliding plate portion 241 so that the frictional force between the sliding plate portion 241 and the irradiation plate 9 is reduced.

  The three moving mechanisms 24, 24, 24 are arranged at equal intervals in the circumferential direction around the center 21 c of the first moving plate 21 with respect to the first moving plate 21. The three moving mechanisms 24, 24, 24 are respectively arranged in the vicinity of the three corners 21 b, 21 b, 21 b of the substantially equilateral triangle in plan view of the first moving plate part 21, and the corners 21 b, 21 b, 21 b and It is arranged on a line connecting the center 21 c of the first moving plate portion 21.

As shown in FIGS. 1, 4, and 5, the fixing portion 3 includes a fixing plate portion 31 (see FIGS. 1 and 4) that is formed in a substantially equilateral triangular shape in plan view with the plate surface facing the vertical direction. And a fixed column portion 32 that stands on the fixed plate portion 31 and connects the fixed plate portion 31 to the beam portion 14 (see FIG. 1).
The fixed plate portion 31 is formed such that the outer shape in plan view is substantially the same as that of the first moving plate portion 21. In the fixed plate portion 31, the three corner portions 311 b, 311 b, 311 b of the substantially equilateral triangle in plan view overlap with the three corner portions 21 b, 21 b, 21 b of the substantially equilateral triangle in the plan view of the first moving plate portion 21. Thus, it is arranged between the first moving plate portion 21 and the second moving plate portion 23.

  The fixed plate portion 31 is formed with three holes 31a, 31a, 31a having a substantially rectangular shape in plan view and penetrating in the vertical direction at positions spaced equidistantly from the center 31c in plan view. These hole portions 31a, 31a, 31a are respectively formed on lines connecting the center 31c and the corner portion 31b of the fixed plate portion 31 in plan view. The moving column parts 22, 22, and 22 of the moving part 2 are inserted through these holes 31a, 31a, and 31a.

The inner shape of the hole portion 31 a of the fixed plate portion 31 is formed to be slightly larger than the outer shape of the movable column portion 22, and the fixed plate portion 31 and the movable column portion 22 are moved to the hole portion 31 a of the fixed plate portion 31. It is configured to be relatively movable in the vertical direction with the portion 22 inserted. In the present embodiment, when the moving column portion 22 is inserted into the hole portion 31 a of the fixed plate portion 31, the distance between the edge portion of the hole portion 31 a of the fixed plate portion 31 and the outer peripheral surface of the moving column portion 22 is about 0. 0. A gap of 1 mm is formed.
In addition, in a state where the movable column portion 22 is inserted through the hole 31a of the fixed plate portion 31, if the fixed plate portion 31 and the movable column portion 22 are relatively movable in the vertical direction, the fixed plate portion 31 and the movable column. The part 22 may be in contact.
Further, in a state where the moving column portion 22 is inserted into the hole 31 a of the fixed plate portion 31, the horizontal displacement of the moving column portion 22 and the fixed plate portion 31 is restricted. Thereby, the relative displacement in the horizontal direction is restricted between the moving unit 2 and the fixed unit 3.

  The fixed column portion 32 is a columnar or cylindrical member extending in the vertical direction, and is inserted through the hole portion 23 a of the second moving plate portion 23 of the moving portion 2. The fixed column part 32 has an upper end fixed to the beam part 14 and a fixed plate part 31 fixed to the lower end. The lower end portion of the fixed column portion 32 is fixed in the vicinity of the center 31 c in plan view of the upper surface of the fixed plate portion 31.

The fixed column portion 32 includes an upper fixed column portion 321 supported by the beam portion 14, a lower fixed column portion 322 fixed to the fixed plate portion 31 and inserted through the hole portion 23 a of the second moving plate portion 23, A connecting plate 323 that connects the upper fixed column portion 321 and the lower fixed column portion 322;
The lower fixed column portion 322 and the fixed plate portion 31 are fixed with, for example, screws or an adhesive.
The outer diameter of the lower fixed column portion 322 is formed slightly smaller than the inner diameter of the hole 23a of the second moving plate portion 23, and the second moving plate portion 23 and the lower fixed column portion 322 are located on the lower side. The fixed column portion 322 is configured to be relatively movable in the vertical direction in a state where the fixed column portion 322 is inserted through the hole portion 23 a of the second moving plate portion 23. In the present embodiment, when the lower fixed column portion 322 is inserted into the hole portion 23 a of the second moving plate portion 23, the edge of the hole portion 23 a of the second moving plate portion 23 and the outer periphery of the lower fixed column portion 322. A gap of about 0.1 mm is formed between the surfaces.
In addition, in the state where the lower fixed column portion 322 is inserted into the hole portion 23a of the second moving plate portion 23, the second moving plate portion 23 and the lower fixed column portion 322 can be relatively moved in the vertical direction. The second moving plate part 23 and the lower fixed column part 322 may be in contact with each other.

  Screws for locking the connection plate 323 to the upper fixed column part 321 can be inserted into the connection plate 323, and a plurality of upper long holes 323 a and a connection plate 323 to lock the lower fixed column part 322 are inserted. A plurality of lower elongated holes 323b through which screws can be inserted are formed. These upper long hole 323a and lower long hole 323b are formed so as to extend in the vertical direction. Thereby, the vertical position of the lower fixed column portion 322 with respect to the upper fixed column portion 321 can be adjusted, and the vertical position of the fixed plate portion 31 with respect to the beam portion 14 can be adjusted.

The separation preventing means 4 includes a tension spring 41 and a first locking portion 42 fixed to the lower surface of the second moving plate portion 23 of the moving portion 2 and capable of locking the upper end portion (one end portion) of the tension spring 41. And a second locking portion 43 that is fixed to the upper surface of the fixing plate portion 31 of the fixing portion 3 and that can lock the lower end portion (the other end portion) of the tension spring 41.
In the present embodiment, three separation preventing means 4, 4, 4 are provided for one displacement measuring device 1 </ b> A, and three tension springs 41, 41, 41 and three first locking portions 42, 42 are provided. , 42 and three second locking portions 43, 43, 43 are provided.
The three tension springs 41, 41, 41 are each composed of a coil spring having the same spring constant. The tension spring 41 is locked to the first locking portion 42 and the second locking portion 43 so that a tensile force always acts.

The three first locking portions 42, 42, 42 are arranged in the vicinity of three substantially triangular sides in a plan view of the second moving plate portion 23. The three first locking portions 42, 42, 42 are formed in a plate shape that extends in the direction in which the adjacent sides extend and the plate surface faces in the horizontal direction. The three first locking portions 42, 42, 42 protrude downward from the lower surface of the second moving plate portion 23, respectively.
A plurality of hole portions 42a, 42a,... Are formed in the three first locking portions 42, 42, 42 at predetermined intervals in the extending direction. These holes 42a, 42a (see FIG. 1) can be hooked with the upper ends of the tension springs 41, respectively.

The three second locking portions 43, 43, 43 are disposed in the vicinity of three substantially triangular sides in the plan view of the fixed plate portion 31. The three second locking portions 43, 43, 43 are formed in a plate shape that extends in the direction in which the sides in the vicinity thereof extend and the plate surface faces in the horizontal direction. The three second locking portions 43, 43, 43 protrude upward from the upper surface of the fixed plate portion 31, respectively.
A plurality of hole portions 43a, 43a (see FIG. 1) are formed in the three second locking portions 43, 43, 43 at predetermined intervals in the extending direction. It is possible to hook the lower end portion of the tension spring 41 in these hole portions 43a, 43a.

These 1st latching | locking parts 42,42,42 and 2nd latching | locking part 43,43,43 are arrange | positioned in the position which overlaps with an up-down direction, 1st latching | locking part 42,42,42 and 2nd latching The tension by the tension springs 41, 41, 41 acts between the portions 43, 43, 43.
For this reason, the position where the hole 42a of the 1st latching | locking part 42 where the upper end part of the tension spring 41 is hooked and the hole 43a of the 2nd latching | locking part 43 where the lower end part of the tension spring 41 is hooked overlap in the up-down direction. If it is arrange | positioned, between the 1st latching | locking part 42 and the 2nd latching | locking part 43, the tension | tensile_strength of the up-down direction by the tension springs 41, 41, 41 will act.
The position where the hole 42a of the first locking part 42 where the upper end of the tension spring 41 is hooked and the hole 43a of the second locking part 43 where the lower end of the tension spring 41 is hooked do not overlap in the vertical direction. If it is arrange | positioned, between the 1st latching | locking part 42 and the 2nd latching | locking part 43, the tension | tensile_strength which becomes a diagonal direction with respect to the up-down direction by the tension springs 41, 41, 41 will act. .
In this way, by selecting the hole 42a of the first locking portion 42 where the upper end of the tension spring 41 is hooked and the hole 43a of the second locking portion 43 where the lower end of the tension spring 41 is hooked. The position and orientation of the tension spring 41 can be adjusted. Thereby, the direction of the tension acting between the second moving plate portion 23 and the fixed plate portion 31 can be adjusted by the tension spring 41.

The three first displacement measuring units 5, 5, and 5 are relative displacement amounts (hereinafter referred to as horizontal directions) between the moving unit 2 and the floor 15 (irradiation plate 9) in a plane (substantially in a horizontal plane) along the floor 15. It is composed of a displacement sensor that can measure the amount of displacement). For example, the three first displacement measuring units 5, 5, and 5 include a barcode reader, an optical displacement sensor using an optical mouse, a displacement sensor using an anotopen, a differential transformer type displacement sensor, and the like. It consists of
In the present embodiment, the three first displacement measuring units 5, 5, 5 are equally spaced in the circumferential direction around the center 21 c of the first moving plate 21 with respect to the first moving plate 21. Has been placed. The three first displacement measuring units 5, 5, 5 are arranged between the three moving mechanisms 24, 24, 24 and the center 21 c of the first moving plate 21, respectively. Note that the three first displacement measuring units 5, 5, 5 may be arranged in the center between the adjacent moving mechanisms 24, 24.

The three second displacement measuring units 6, 6, and 6 are configured to be able to measure relative displacement amounts in the vertical direction between the fixed plate unit 31 and the movable column unit 22, respectively. As a result, the second displacement measuring units 6, 6, 6 are configured to be able to measure the relative displacement in the vertical direction between the beam portion 14 and the floor portion 13 (hereinafter referred to as the vertical displacement amount). Yes.
Such second displacement measuring units 6, 6 and 6 include, for example, a barcode reader, an optical displacement sensor using an optical mouse, a displacement sensor using an anotopen, and a differential transformer type displacement sensor. Etc.
Further, in the present embodiment, the three second displacement measuring units 6, 6, and 6 are arranged at equal intervals in the circumferential direction around the center 31 c of the fixed plate portion 31 with respect to the fixed plate portion 31. . The three second displacement measuring units 6, 6, 6 are respectively disposed between the three holes 91, 91, 91 formed in the fixed plate portion 31 and the center 31 c of the fixed plate portion 31. .

  In this embodiment, the horizontal displacement data measured by the three first displacement measuring units 5, 5, and 5 and the vertical direction measured by the three second displacement measuring units 6, 6, and 6, respectively. The displacement amount data is communicated to a processing unit (not shown), and the processing unit is configured to calculate an accurate horizontal displacement amount and vertical displacement amount based on these data. . The displacement measuring device 1A includes a communication device for communicating these data from the three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 to the processing unit, Memory for storing displacement data measured by the three first displacement measuring units 5, 5, 5 and three second displacement measuring units 6, 6, 6 and displacement data processed by the processing unit, etc. Departments are installed as appropriate.

Next, a method of processing displacement data (hereinafter referred to as data) measured by the three first displacement measuring units 5, 5, and 5 by the processing unit will be described with reference to the flowchart shown in FIG.
Note that the processing method of the displacement data measured by the three second displacement measuring units 6, 6, 6 is the displacement amount data measured by the three first displacement measuring units 5, 5, 5 respectively. The processing is performed in the same manner as the processing method by the processing unit (hereinafter referred to as data), and the description is omitted.

(Measurement step)
The relative displacement amounts of the moving unit 2 and the floor 15 are respectively measured by the three first displacement measuring units 5, 5, and 5 of the displacement measuring apparatus 1A described above (S-1).

(Correction step)
In the measurement step (S-1), the relative displacement data (hereinafter referred to as data) between the moving unit 2 and the floor 15 measured by the three first displacement measuring units 5, 5, and 5 are axially corrected, and the reference and The time history of two pieces of data other than the one piece of data is matched with one piece of reference data (S-2).

(Selection step)
Of the three data whose axes have been corrected in the correction step (S-2), data for the subsequent average value calculation step is selected (S-3).
First, it is determined whether or not the three data are missing (S-4).
If it is determined in this determination (S-3) that there is no missing data, a standard deviation is calculated from the three data (S-5).
Then, it is determined whether or not there is an abnormal value outside the standard deviation range in the data (S-6).
If it is determined in this determination (S-6) that there is no abnormal value outside the standard deviation range, three data are selected (S-7).

If it is determined in this determination (S-6) that the data has an abnormal value outside the standard deviation range, the first displacement obtained by measuring the data outside the standard deviation range in the measurement step (S-1). Changes in data measured by the first displacement measuring unit 5 that measures data within the standard deviation range are applied with reference to data measured immediately before the data outside the standard deviation range is measured by the measuring unit 5. Correction data is calculated (S-8).
Then, the correction data and data within the standard deviation are selected (S-9).

  Further, in the determination of whether or not the three data are missing (S-4), if there is a missing data, the data that is not missing is selected (S-10).

(Average value calculation step)
Selection process (S7, S9, S10) of the selection step (S-3) The average value of the selected data is calculated, and this average value is used as the relative displacement (representative value) between the moving unit 2 and the floor 15. (S-11).

Returning to FIG. 1 to FIG. 3, the switch unit 7 includes a switch sphere 71 that can move while rotating along the floor surface 15 while being inserted into the hole 21 a of the first moving plate 21 of the moving unit 2. , Four mechanical switches 72, 72,... For driving the three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 when the switch sphere 71 abuts. ,have.
The switch sphere 71 is formed to have a diameter slightly smaller than the inner diameter of the hole 21 a of the first moving plate 21. When the switch sphere 71 is inserted into the hole 21 a of the first moving plate 21, The movable plate portion 21 is configured to be movable inside the hole portion 21a.

Such a switch sphere 71 has a very small mass as compared with the seismic isolation structure 11 and is configured to be displaceable even by minute vibrations that the seismic isolation structure 11 does not displace (deform). For this reason, the switch sphere 71 can be displaced even by a minute vibration that does not displace the moving part 2, and the moving part 2 and the switch sphere 71 behave differently due to the minute vibration.
Note that the friction coefficient between the switch sphere 71 and the floor surface 15 is smaller than the friction coefficient between the movement sphere 24b of the moving mechanism 24 and the floor surface 15, and even if a vibration such as an earthquake occurs. You may be comprised so that it may stay at substantially one point without shaking. And if the floor 15 and the moving part 2 are relatively displaced, the moving part 2 and the switch sphere 71 may be configured to behave differently.

The mechanical switches 72, 72,... Are arranged at equal intervals along the edge of the hole 21 a of the first moving plate portion 21.
In such a switch part 7, the switch sphere 71 inserted in the hole 21 a of the first moving plate part 21 of the moving part 2 and the moving part 2 is stationary at normal times when earthquake vibration or the like has not occurred. The switch sphere 71 and the mechanical switches 72, 72,... Provided at the edge of the hole 21a of the first moving plate portion 21 are separated from each other. When the switch 7 is struck by an earthquake, the switch sphere 71 behaves differently from the moving unit 2 and hits one or more of the four mechanical switches 72, 72,. Touch.

In the present embodiment, when the switch sphere 71 comes into contact with any one or more of the four mechanical switches 72, 72,..., The three first displacement measuring units 5, 5, 5 and Power is supplied to the three second displacement measuring units 6, 6, 6 so that the three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 are driven. Has been. At this time, if the switch sphere 71 is configured to be displaceable by slight vibration, the switch sphere 71 can come into contact with any one or more of the four mechanical switches 72, 72,. Therefore, the relative displacement amount of the moving part 2 and the floor 15 can be measured from the state of slight vibration.
The three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 that are driven are in a fixed period in which a state in which a displacement amount greater than a predetermined value is not measured is set. After a lapse of time, the power supply from the battery is stopped and the measurement is stopped.

In the present embodiment, the three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 that are driven are continuously in a state in which the amount of displacement being measured is 0 mm. When 10 seconds elapse, the supply of power from the battery is stopped and the measurement is stopped.
In this embodiment, the signal from the switch unit 7 and the value of the measurement amount measured by the three first displacement measuring units 5, 5, 5 and the three second displacement measuring units 6, 6, 6 are used. The supply of power from the battery to the three first displacement measurement units 5, 5, 5 and the three second displacement measurement units 6, 6, 6 is controlled, and the three first displacement measurement units 5, 5, 5, and 3 are controlled. A control unit (not shown) for controlling the driving and stopping of the second displacement measuring units 6, 6, 6 is provided.

  The battery is disposed, for example, between the first moving plate portion 21 and the fixed plate portion 31 of the moving portion 2 or on the upper portion of the fixed plate portion 31. When the battery is arranged on the upper part of the fixed plate portion 31, it is easy to replace the battery.

Next, operations and effects of the displacement measuring apparatus 1A according to the first embodiment described above will be described with reference to the drawings.
In the displacement measuring apparatus 1 </ b> A according to the first embodiment described above, the moving unit 2 and the fixed unit 3 are restrained from moving in the horizontal direction along the floor surface 15. It moves in the horizontal direction along the floor 15. For this reason, the horizontal relative displacement between the floor 13 and the beam 14 can be measured by measuring the horizontal relative displacement between the moving unit 2 and the floor 15 by the first displacement measuring unit 5. .
In addition, since the moving unit 2 and the fixed unit 3 are allowed to move in the vertical direction, the second displacement measuring unit 6 measures the amount of vertical relative displacement between the moving unit 2 and the fixed unit 3. Thus, the relative displacement between the floor portion 13 and the beam portion 14 in the direction intersecting the floor surface 15 can be measured.
Since the displacement measuring device 1A includes the separation preventing means 4, the moving unit 2 is prevented from separating from the floor surface 15. Therefore, the moving unit 2 is separated from the floor surface 15 so that the floor unit 13 and the beam unit are separated. Therefore, the relative displacement amount between the floor portion 13 and the beam portion 14 can be reliably measured.

In addition, the movable column portion 22 can be moved relative to the fixed plate portion 31 in the vertical direction while being inserted into the hole portion 31 a of the fixed plate portion 31, and the fixed column portion 32 is a hole portion of the second movable plate portion 23. The movable part 2 and the fixed part 3 are restrained from the horizontal relative displacement between the movable part 2 and the fixed part 3 by being relatively movable in the vertical direction with respect to the second movable plate part 23 in a state of being inserted into the 23a. Relative displacement in the vertical direction can be allowed. Accordingly, the horizontal relative displacement between the floor 13 and the beam 14 can be measured by measuring the horizontal relative displacement between the moving unit 2 and the floor 15, and the moving unit 2 and the fixed unit 3. The relative displacement amount of the floor portion 13 and the beam portion 14 can be measured by measuring the vertical relative displacement amount of the vertical direction.
And the separation preventing means is a tension spring that connects the second moving plate portion 23 and the fixed plate portion 31, so that when the moving portion 2 moves away from the floor surface 15 due to vibration or the like, Since it is returned downward by the restoring force of the tension spring, the moving part 2 can be prevented from leaving the floor surface 15.

  In addition, since a plurality of moving column portions 22 are arranged and inserted into the holes 31a of the fixed plate portion 31, respectively, the horizontal relative displacement between the moving portion 2 and the fixed portion 3 is restricted at a plurality of locations. can do. Further, the tension springs 41 are arranged at intervals between the moving column portions 22 adjacent in the circumferential direction, so that the moving portion 2 can be reliably prevented from being separated from the floor surface 15 by the restoring force of each tension spring 41. .

  The separation preventing means 4 includes a first locking portion 42 provided on the second moving plate portion 23 and capable of locking one end of the tension spring 41 at each of a plurality of different positions in the horizontal direction, and a fixed plate. A second locking portion 43 provided in the portion 31 and capable of locking the other end of the tension spring 41 at each of a plurality of different positions in the horizontal direction, thereby installing the tension spring 41 at an arbitrary position. It is possible to adjust the expansion / contraction direction of the tension spring 41. Thereby, the position which urges | biases the moving part 2 to the floor 15 with the tension | pulling spring 41, and the magnitude | size of urging | biasing force can be adjusted.

(Second Embodiment)
Next, the second embodiment will be described with reference to FIGS. 7 to 13, but the same or similar members and parts as those of the first embodiment described above are denoted by the same reference numerals and description thereof is omitted. A configuration different from the embodiment will be described.
As shown in FIGS. 7 and 8, the displacement measuring device 1B according to the second embodiment does not have the switch unit 7 (see FIG. 1) as compared with the displacement measuring device 1A according to the first embodiment, and the floor surface. Position detecting means 8 for detecting the position of the moving unit 2 with respect to 15 is provided.
In the displacement measuring apparatus 1 </ b> B according to the second embodiment, the hole 71 a through which the switch sphere 71 is inserted is not formed in the first moving plate portion 21.
In FIG. 8, the external shape of the 1st movement board part 21 is shown as the continuous line.

  As shown in FIG. 8, the position detection means 8 includes a hall element (first position detection unit) 81 provided in the moving unit 2 and three photo reflectors (second position detection unit) provided in the moving unit 2. 82, 82, 82, a Hall element 81, and an arithmetic processing unit (not shown) for processing detection of the three photo reflectors 82, 82, 82. As shown in FIG. 9, a permanent magnet (index) 91 that can be detected by the Hall element 81 is embedded in the irradiation plate 9, and three photo reflectors 82, 82, and 82 can be detected by each of the four. Lines 92, 92, ... of the book are drawn.

The hall element 81 is attached to the lower surface of the first moving plate portion 21 of the moving unit 2 so as to face the irradiation plate 9, and is configured to move together with the moving unit 2.
The permanent magnet 91 is disposed immediately below the Hall element 81 in a state where the moving unit 2 is disposed at the origin (initial position). For this reason, the moving unit 2 is configured such that when the Hall element 81 is disposed vertically above the permanent magnet 91 of the irradiation plate and detects the permanent magnet 91, it is determined that the moving unit 2 is disposed at the origin. . In the present embodiment, when the Hall element 81 detects the permanent magnet 91, the horizontal displacement of the moving unit 2 is reset to zero.

The three photo reflectors 82, 82, and 82 are attached to the lower surface of the first moving plate portion 21 of the moving unit 2 so as to surround the Hall element 81, and are configured to move together with the moving unit 2.
In the present embodiment, the irradiation plate 9 is black and the four lines 92, 92,... Are white, and the three photo reflectors 82, 82, 82 are determined from the reflectance of the light irradiated on the irradiation plate 9, respectively. The four lines 92, 92,... Can be detected.

Here, two orthogonal directions along the upper surface of the irradiation plate 9 are the X direction and the Y direction, and the four lines 92, 92,... Are the first line 92A, the second line 92B, the third line 92C, 4-wire 92D.
The first line 92A and the second line 92B extend in the X direction, and the third line 92C and the fourth line 92D extend in the Y direction. The first line 92A and the second line 92B are arranged with a gap D1 in the Y direction, and the third line 92C and the fourth line 92D are arranged with a gap D2 in the X direction. The distance D1 and the distance D2 are set to different dimensions.

Returning to FIG. 8, the three photo reflectors 82, 82, 82 are referred to as a first photo reflector 82A, a second photo reflector 82B, and a third photo reflector 82C.
The first photo reflector 82A and the second photo reflector 82B are arranged with an interval D2 (interval between the third line 92C and the fourth line 92D) in the X direction. The first photo reflector 82A and the second photo reflector 82B do not overlap each other in the X direction, and are arranged so that the interval in the Y direction is not the interval D1 (the interval between the first line 92A and the second line 92B). Has been.
The second photo reflector 82B and the third photo reflector 82C are arranged with a gap D1 in the Y direction. Note that the second photo reflector 82B and the third photo reflector 82C are arranged so as not to overlap each other in the Y direction and so that the interval in the X direction does not become the interval D2.
The first photo reflector 82A and the third photo reflector 82C are arranged so as not to overlap each other in the X direction and the Y direction, so that the interval in the X direction does not become the interval D2, and further, the interval in the Y direction does not become the interval D1. Has been.

As shown in FIG. 10, when the moving unit 2 is disposed at the origin (initial position), the first photo reflector 82A is disposed immediately above the fourth line 92D, and the second photo reflector 82B is disposed on the first line 92A. The third photo reflector 82C is disposed immediately above the second line 92B.
The moving unit 2 is supported by a guide (not shown) so as not to rotate around a vertical axis. Further, the first to third photo reflectors 82A to 82C move along with the moving unit 2 and extend in the X direction when crossing the upper portions of the first to fourth lines 92A to 92D (the first line 91A and the second line). It is configured to be able to discriminate whether it crosses the upper part of the line 91B) or the upper part of the lines extending in the Y direction (the third line 91C and the fourth line 91D).

Next, a detection state by the position detection unit 8 will be described.
As shown in FIG. 10, the moving unit 2 moves, the first photo reflector 82A is disposed immediately above the fourth line 92D, and the second photo reflector 82B is directly above the intersection of the first line 92A and the third line 92C. The third photo reflector 82C is disposed immediately above the second line 92B, the Hall element 81 is disposed directly above the permanent magnet 91, and the first to third photo reflectors 82A to 82C are respectively connected to the line. When the Hall element 81 detects the permanent magnet 91, the arithmetic processing unit outputs that the moving unit 2 is arranged at the normal position (origin) in both the X direction and the Y direction. As a result, both the displacement amount in the X direction and the displacement amount in the Y direction of the moving unit 2 are reset to zero.

  As shown in FIGS. 11A and 11B, the moving unit 2 moves, the first photo reflector 82A is disposed immediately above the fourth line 92D, and the second photo reflector 82B is directly above the third line 92C. If the first photo reflector 82A and the second photo reflector 82B detect the lines, the third photo reflector 82C does not detect the lines, and the Hall element 81 does not detect the permanent magnet 91, the arithmetic processing unit is arranged. When the moving unit 2 is arranged at the normal position in the X direction, it outputs. Thereby, the displacement amount of the moving part 2 in the X direction is reset to zero.

  As shown in FIGS. 12A and 12B, the moving unit 2 moves, the second photo reflector 82B is disposed immediately above the first line 92A, and the third photo reflector 82C is directly above the second line 92B. If the second photo reflector 82B and the third photo reflector 82C detect the line, the first photo reflector 82A does not detect the line, and the Hall element 81 does not detect the permanent magnet 91, the arithmetic processing unit is arranged. When the moving unit 2 is arranged at the normal position in the Y direction, it outputs. Thereby, the displacement amount of the moving part 2 in the Y direction is reset to zero.

In cases other than the above, the arithmetic processing unit is configured not to determine that the moving unit 2 is disposed at the normal position in both the X direction and the Y direction.
In addition, as shown in FIG. 13, the moving unit 2 moves and the first photo reflector 82A is disposed immediately above the third line 92C, the second photo reflector 82B is disposed immediately above the first line 92A, and the third If the photoreflector 82C is disposed immediately above the second line 92B and the first to third photoreflectors 82A to 82C detect lines, but the Hall element 81 does not detect the permanent magnet 91, the arithmetic processing unit The moving unit 2 is configured not to determine that the moving unit 2 is disposed at the normal position (origin) in both the X direction and the Y direction.

  The displacement measuring device 1B according to the second embodiment has the same effect as that of the first embodiment, and has the position detecting means 8 so that the positional accuracy of the displacement measuring device 1B can be increased.

As mentioned above, although the embodiment of the displacement measuring apparatus by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, the displacement measuring devices 1A and 1B are installed in the seismic isolation layer 12 of the seismic isolation structure 11, but may be installed other than the seismic isolation layer 12, or the seismic isolation structure 11 You may install in structures other than. Further, in the above embodiment, the moving unit 2 is configured to be movable along the floor surface 15, and the fixed unit 3 is fixed to the beam unit 14, but the installation surface and the fixed unit 3 on which the moving unit 2 moves are included. The structure part of the structure to which the is fixed may be set as appropriate.

  In the above embodiment, the three first displacement measuring units 5, 5, and 5 and the three second displacement measuring units 6, 6, and 6 are provided. And the number of the 2nd displacement measurement parts 6 may be suitably set as 1 or 2 or 4 or more. Further, the position where the first displacement measuring unit 5 is installed and the position where the second displacement measuring unit 6 is installed may be set as appropriate. In addition, the processing method of the displacement amount data measured by the plurality of first displacement measurement units 5, 5,... And the processing method of the displacement amount data measured by the plurality of second displacement measurement units 6, 6,. Other processing methods may be set as appropriate. Further, any one of the first displacement measuring unit 5 and the second displacement measuring unit 6 may be provided.

Moreover, in said 1st Embodiment, although the switch part 7 is provided, the switch part 7 is not provided but the 1st displacement measurement part 5 and the 2nd displacement measurement part 6 always measure a displacement amount. It may be configured as follows. Further, the position, number, and form of the switch unit 7 may be set as appropriate.
In the above embodiment, the displacement measuring devices 1A and 1B are provided with batteries capable of supplying power to the first displacement measuring unit 5 and the second displacement measuring unit 6, but such batteries are provided. For example, the first displacement measurement unit 5 and the second displacement measurement unit 6 may be configured to supply power from a power supply device provided in the seismic isolation structure 11.

In the above-described embodiment, the moving unit 2 includes the first moving plate portion 21 and the fixed plate portion 31 that are formed in a substantially equilateral triangle shape or a substantially cross shape in plan view. The shape of the part 21 and the fixed plate part 31 may be other than the above.
In the above embodiment, the switch sphere 71 is configured to abut on the floor surface 15 and move on the floor surface 15, but a plate material is provided in which the plate surface faces in the vertical direction. The switch sphere 71 may be configured to move on the plate material. In addition, this board | plate material may be supported by the floor part 13 and the beam part 14, and may be supported by the moving part 2. FIG.

  In the above embodiment, the moving mechanism 24 includes the sliding plate portion 241 that can slide on the upper surface of the irradiation plate 9 and the connecting portion 242 that connects the sliding plate portion 241 to the lower surface of the first moving plate portion 21. Although it has, it is good also as a bearing, a wheel, etc. which are provided under the 1st movement board part 21, and were connected with the 1st movement board part 21. In the above embodiment, a Teflon (registered trademark) sheet is used as a member that is attached to the lower surface of the sliding plate portion 241 and reduces the frictional force between the sliding plate portion 241 and the irradiation plate 9. A sheet other than a (registered trademark) sheet may be used.

  Further, in the above embodiment, the fixed column portion 32 is fixed to the upper fixed column portion 321 supported by the beam portion 14 and the fixed plate portion 31 and is inserted into the hole portion 23 a of the second moving plate portion 23. Although it has the lower fixed pillar part 322 and the connection plate 323 which connects the upper fixed pillar part 321 and the lower fixed pillar part 322, the fixed pillar part 32 is formed from one columnar member. May be. Moreover, when the fixed column part 32 is formed from a plurality of columnar members, the form in which the respective columnar members are connected may be appropriately set. For example, without providing the connecting plate 323 as described above, a screw portion extending in the vertical direction is formed on one of the upper fixed column portion 321 and the lower fixed column portion 322, and the screw portion to which the screw portion can be screwed is formed on the other. A hole may be formed, and the vertical position of the lower fixed column portion 322 relative to the upper fixed column portion 321 may be adjusted by adjusting an amount of screwing between the screw portion and the screw hole. .

In the second embodiment, the numbers and positions of the hall elements 81 and the permanent magnets 91 may be set as appropriate.
In the second embodiment, the number of photo reflectors 82 and the number and shape of the lines 92 drawn on the irradiation plate 9 may be set as appropriate. For example, the line 92 drawn on the irradiation plate 9 may be a curved line or a line drawing a circle. The direction in which the line 92 extends may be other than the Y direction and the X direction.
Further, the position detection means 8 may have only the photo reflector 82 or only the Hall element 81.
Moreover, in said 2nd Embodiment, the switch part 7 like 1st Embodiment may be provided.

1A, 1B Displacement measuring device 2 Moving part 3 Fixed part 4 Separation preventing means 5 First displacement measuring part (displacement measuring means)
6 Second displacement measuring unit (displacement measuring means)
8 Position detection means 9 Irradiation plate 11 Seismic isolation structure 12 Seismic isolation layer 13 Floor part (first structure part)
14 Beam (second structure)
15 Floor (installation surface)
21 first moving plate portion 22 moving column portion 23 second moving plate portion 23a hole portion 31 fixed plate portion 31a hole portion 32 fixed column portion 41 tension spring 42 first locking portion 43 second locking portion 81 hall element (first 1 position detector)
82 Photo reflector (second position detector)
91 Permanent magnet (index)
92 lines

In order to achieve the above object, a displacement measuring apparatus according to the present invention measures a relative displacement amount between a first structure portion and a second structure portion of a structure having a first structure portion and a second structure portion. In the displacement measuring device, a moving unit installed movably along an installation surface provided in the first structure unit, a fixed unit fixed to the second structure unit, and the moving unit and the fixed unit Displacement measuring means installed at least on one side and capable of measuring a relative displacement amount between the first structure part and the second structure part, wherein the moving part and the fixed part are along the installation surface. A separation preventing means for restraining the separation between the moving portion and the installation surface supported by the fixed portion, the relative movement in the direction being restricted and the relative movement in the direction intersecting the installation surface is allowed; Furthermore possess, the first structure portion, than the second structure section The installation surface is a horizontal surface facing the second structure part, and the moving part is arranged above the first moving plate part and the first moving plate part with a space therebetween. A second moving plate portion; and a moving column portion extending in a vertical direction connecting the first moving plate portion and the second moving plate portion, wherein the fixed portion is the first moving plate portion. And a fixed column portion extending between the fixed plate portion arranged between the fixed plate portion and the second structure portion, and the fixed column portion extending between the fixed plate portion and the second structure portion. The column portion is movable in the vertical direction relative to the fixed plate portion while being inserted into a hole formed in the fixed plate portion, and the fixed column portion is formed in the second moving plate portion. The second moving plate portion can be moved relative to the second moving plate portion in a vertical direction while being inserted into the hole portion, and the separation preventing means includes the second moving plate portion and the fixed plate portion. And having a tension spring connecting.

In the displacement measuring apparatus according to the present invention, a plurality of the movable column portions are arranged at predetermined intervals in the circumferential direction around the axis of the fixed column portion, and a plurality of the movable columns are disposed on the fixed plate portion. It is preferable that a plurality of the hole portions through which the respective portions are inserted are formed, and the tension springs are respectively disposed between the movable column portions adjacent in the circumferential direction.
By setting it as such a structure, the horizontal relative displacement of a moving part and a fixing | fixed part can be restrained in several places. Further, since the tension springs are arranged at intervals between the moving column portions adjacent in the circumferential direction, it is possible to reliably prevent the moving portions from being separated from the installation surface by the restoring force of each tension spring.

Further, in the displacement measuring apparatus according to the present invention, an initial position where the moving unit is arranged in an initial state is set on the installation surface, and whether or not the moving unit is arranged at the initial position is determined. A position detecting means for detecting, wherein the position detecting means is provided in the moving part, and a first detecting part for detecting a line on the installation surface and a predetermined distance from the first detecting part; Based on the second detection unit that is provided in the moving unit and detects an index provided on the installation surface, the detection result of the first detection unit, and the detection result of the second detection unit, A calculation processing unit that calculates a position, and the distance between the representative point of the index and a specific point on the line may be a distance determined according to the predetermined distance.
By setting it as such a structure, the positional accuracy of a displacement measuring apparatus can be improved.

Further, in the displacement measuring apparatus according to the present invention, an initial position where the moving unit is arranged in an initial state is set on the installation surface, and whether or not the moving unit is arranged at the initial position is determined. A position detecting means for detecting, wherein the position detecting means is provided in the moving part, and a first detecting part for detecting a line on the installation surface and a predetermined distance from the first detecting part; provided in the mobile unit, and a second detector for detecting an index provided on the installation surface, on the basis of the detection result of the detection result and the second detection portion of the first detecting unit, in said installation surface A calculation processing unit that calculates a position, and the distance between the representative point of the index and a specific point on the line may be a distance determined according to the predetermined distance.
By setting it as such a structure, the positional accuracy of a displacement measuring apparatus can be improved.

Claims (5)

In a displacement measuring apparatus for measuring a relative displacement amount between the first structure portion and the second structure portion of a structure having a first structure portion and a second structure portion,
A moving part installed movably along an installation surface provided in the first structure part;
A fixing part fixed to the second structure part;
Displacement measuring means installed on at least one of the moving part and the fixed part and capable of measuring a relative displacement amount between the first structure part and the second structure part,
The moving part and the fixed part are allowed to move in a direction perpendicular to the installation surface while being restricted in relative movement in the direction along the installation surface,
The displacement measuring device further comprising a separation preventing means supported by the fixed portion and preventing separation between the moving portion and the installation surface. The first structure part is disposed below the second structure part, and the installation surface is a horizontal surface facing the second structure part,
The moving unit connects the first moving plate unit, the second moving plate unit disposed above the first moving plate unit with a space therebetween, and the first moving plate unit and the second moving plate unit. A moving column portion extending in the vertical direction,
The fixed portion includes a fixed plate portion disposed between the first movable plate portion and the second movable plate portion, and a fixed portion extending in a vertical direction connecting the fixed plate portion and the second structure portion. And a pillar portion,
The movable column portion is movable relative to the fixed plate portion in a vertical direction in a state of being inserted into a hole formed in the fixed plate portion,
The fixed column part is movable relative to the second moving plate part in a vertical direction in a state of being inserted through a hole formed in the second moving plate part,
The displacement measuring apparatus according to claim 1, wherein the separation preventing unit includes a tension spring that connects the second moving plate portion and the fixed plate portion. A plurality of the movable column portions are arranged at predetermined intervals in the circumferential direction around the axis of the fixed column portion, and a plurality of the hole portions through which the plurality of movable column portions are respectively inserted are fixed to the fixed plate portion. Formed,
The displacement measuring device according to claim 2, wherein the tension springs are arranged at intervals between the moving column portions adjacent in the circumferential direction.   The separation preventing means is provided on the second moving plate portion, and a first locking portion capable of locking one end portion of the tension spring at each of a plurality of different positions in the horizontal direction, and the fixed plate portion The displacement measuring device according to claim 2, further comprising: a second locking portion that is provided and can lock the other end of the tension spring at each of a plurality of different positions in the horizontal direction. . Having a position detecting means for detecting the position of the moving part on the installation surface;
The position detection means is provided in the moving unit and detects a line on the installation surface;
A second detection unit that is provided in the moving unit at a predetermined distance from the first detection unit and detects an index provided on the installation surface;
An arithmetic processing unit that calculates a position on the measurement surface based on the detection result of the first detection unit and the detection result of the second detection unit;
The distance between a representative point of the index and a specific point on the line is a distance determined according to the predetermined distance. Displacement measuring device.

Images