JP3853497B2 - Maximum value memory sensor, maximum value memory sensor mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to a structural member such as a structural material or a membrane material in a ground structure such as a building, a bridge, a tunnel, a membrane structure, a non-ground structure such as an aircraft or a ship, or various ground structures. In particular, the present invention relates to a maximum value storage sensor used to detect a maximum displacement amount corresponding to a maximum load applied in the past, and particularly to an attachment structure when the maximum value storage sensor is attached to a structure.
[0002]
[Prior art]
Due to the deformation of the structural member itself in the structure or the change in the distance between the structural members, the distance between the two points inside the structure changes. And by detecting the maximum value of such displacement, it is diagnosed what kind of strength change has occurred in the structure due to external force, and from this, the possibility of destruction of the structure is predicted nondestructively The method is known.
[0003]
As the maximum value storage sensor used in such a method, the applicant of the present application has proposed those disclosed in, for example, Japanese Patent Application Laid-Open Nos. 8-178765 and 9-96576. These maximum value storage sensors basically arrange a plurality of folded conductive elements in parallel so that the folded portions are in a horizontal line, and have a relative resistance value corresponding to sequential breakage of each conductive element. The conductor includes a conductor formed so as to cause a change, a breaker that can break the conductive element at the folded portion, and a slider that moves the breaker relative to the conductor. The maximum value storage sensor is attached to a structural member that is a displacement detection target in the structure so that the slider moves in parallel according to the displacement of the structural member. That is, in this maximum value storage sensor, the slider is moved in parallel according to the displacement of the structural member and the breaking means is moved in accordance with the amount of movement of the slider to break the conductive element by a predetermined number to change the resistance value. The maximum value is detected by using this change in resistance value.
[0004]
The maximum value storage sensor is excellent in that the displacement of the structural member can be detected with sufficiently stable accuracy while having a very simple structure. However, in order to further increase the displacement detection accuracy, some contrivance is required for the mounting structure of the maximum value storage sensor. That is, this maximum value storage sensor has a very simple structure, and it is relatively easy to move the breaking means in response to the displacement of the slider accurately, but the slider can be accurately adjusted according to the displacement of the structural member. There is still room for innovation. For example, since the use of the maximum value storage sensor is diverse, there is a case where the displacement amount cannot be measured sufficiently because the range of the displacement amount is not always constant. Specifically, when measuring the displacement of the ground for the prediction of landslides, the displacement of the seismic isolation device is measured while the measured displacement is approximately 1 to 2 mm. When it is going to perform, it will be necessary to measure the displacement of about 300-500 mm. To cope with such a difference in the amount of displacement, there can be considered a corresponding means of preparing a plurality of types of sensors corresponding to the difference and using them differently, but this tends to increase the cost.
[0005]
[Problems to be solved by the invention]
Therefore, the present invention provides a maximum value storage sensor having a slider that performs parallel movement according to the amount of displacement so that it can function with high accuracy under any circumstances regardless of the amount of displacement. By providing a mounting structure of the value storage sensor, the use range of the maximum value storage sensor is further expanded.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the maximum value storage sensor mounting structure of the present invention is as follows. That is, it is a mounting structure of a maximum value storage sensor provided with a slider that moves in parallel according to the amount of displacement caused by the change in the distance between two points in the structural member, and the total length of the measurement section to be measured for the amount of displacement. A maximum value storage sensor which connects the slider and the slide member which is arranged over the range and slides in accordance with the displacement of the measurement section, and is attached with a scaling means for scaling the displacement of the slide member and displacing the slider This is a mounting structure.
[0007]
According to the present invention, the actually generated displacement can be appropriately enlarged or reduced by the magnification changing means, and the slider can be moved by the displacement after the magnification changing. Even in such a case, the displacement can be detected by one maximum value storage sensor.
[0008]
The zooming unit may be any unit that can expand and contract one linear displacement and output it as another linear motion. For example, it is constituted by a combination of pulleys or a combination of gears. It is possible. Further, when a plurality of pantographs connected in series is used as the scaling means, it is possible to collect the entire apparatus in a straight line, which is preferable because the mounting width of the maximum value storage sensor can be reduced. The sliding means referred to in the present invention is appropriately selected from wires, spokes and other linear bodies, tubular bodies and other rod-like bodies.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, first to third embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of each embodiment, common portions are denoted by common reference numerals, and duplicate descriptions are omitted.
[0010]
1st Embodiment: The attachment structure of the maximum value memory | storage sensor by 1st Embodiment of this invention is shown in FIG. The maximum value storage sensor A is attached in the sensor box B, and is attached to the structural member indirectly by attaching the sensor box B to the structural member located at one end of the measurement section. Further, the maximum value storage sensor A includes a slider S that can be moved in parallel.
[0011]
The slider S is connected to a continuous pantograph 2 as a zooming unit formed by connecting five stages of pantographs 2a in series via a connection fitting 1. More specifically, one end of the continuous pantograph 2 is attached to the sensor box B, and the connection point of the pantograph 2a closest to the maximum value storage sensor A is connected to the slider S via the connection fitting 1. . On the other hand, the other end of the continuous pantograph 2 is connected to a wire 3 as a slide member. The wire 3 is stretched along the measurement section, and the other end is fixed to the other end of the measurement section (not shown).
[0012]
According to this mounting structure, when the measurement section is elongated and the wire 3 slides by a predetermined amount in the X direction in the figure, the displacement reduced to 1/5 times through the five-stage pantograph 2 is the slider S. Is transmitted to.
[0013]
Second Embodiment: The maximum value storage sensor mounting structure according to this embodiment is as shown in FIG. Roughly speaking, this mounting structure includes an inner rod 4, an outer rod 5 as a slide member, and a sensor box B with a built-in maximum value storage sensor A. The outer rod 5 is fixed to a beam 7 as a structural member via a terminal 6. The inner rod 4 is fixed in such a manner that its proximal end is inserted into a mounting pipe 10 attached to a column 8 as a structural member via a terminal 9, and its distal end is slidable in a hollow portion 11 inside the outer rod 5. Has been inserted.
[0014]
The structure in the sensor box B is as shown in FIG. The base 12 of the sensor box B is fixed to the inner rod 4. Further, two maximum value storage sensors A are fixedly attached to the base 12. On the other hand, the slider S in the maximum value storage sensor A is connected to the outer rod 5 via a transmission plate 13 that is rotatably fixed to a point C on the center line of the inner rod 4. Specifically, the connection pin 14 is welded and fixed along the outer periphery of the outer rod 5 in a direction perpendicular to the transmission plate 13, and the connection pin 14 is fixed to the transmission plate 13, and the two transmission pins 15, The slider S is connected to the outer rod 5 by inserting the transmission pins 15 and 15 into the square holes 7 provided in the detection fitting 16 connected to each slider S.
[0015]
The maximum value storage sensor A attached in such a structure functions as follows. That is, when displacement occurs in the direction in which the measurement section contracts, the outer rod 5 moves to the left in the figure, and accordingly, the transmission plate 13 connected to the outer rod 5 by the connection pin 14 is counterclockwise around the point C. Rotate around. Along with this, the lower transmission pin 15 in the figure moves to the right side in the figure, and the slider S connected thereto via the detection fitting 16 moves to the right side in the figure, resulting in the lower side in the figure. The displacement is detected by the maximum value storage sensor A on the side. At this time, since the distance from the point C where the transmission plate 13 is fixed to the connection pin 14 is different from the distance from the point C where the transmission plate 13 is fixed to the transmission pin 15, the displacement changes according to the ratio. Doubled. When the displacement occurs in this direction, the upper transmission pin 15 in the figure is in a floating state in the square hole 17 of the detection fitting 16, and the maximum value storage sensor A on the upper side in the figure does not operate. Become. Further, when a displacement occurs in the direction opposite to the above description, that is, in the direction in which the measurement section extends, the displacement amount is detected by the upper maximum value storage sensor A. Therefore, if this attachment structure is used and an external output is separately taken from each maximum value storage sensor A, the direction and amount of displacement can be measured.
[0016]
3rd Embodiment: The attachment structure of the maximum value memory | storage sensor by this embodiment is as having shown in FIG. This mounting structure is common to that in the second embodiment except for the internal structure of the sensor box B.
[0017]
In this embodiment, there is only one maximum value storage sensor A attached to the base 12. In addition, two connection pins 14 are welded and fixed to the outer periphery of the outer rod 5 at symmetrical positions. In addition, the transmission plate 13 is provided with two notches 18 having openings in the same direction as the moving direction of the slider S or in the opposite direction. A transmission pin 15 is erected. The transmission pin 15 is inserted into the square hole 17 of the detection fitting 16, and the connection pin 14 is inserted into the notch 18.
[0018]
In the mounting structure of the maximum value storage sensor in this embodiment, the transmission plate 13 rotates counterclockwise around the point C even if the outer rod 5 moves in either the left or right direction in the figure. Therefore, according to this structure, it is possible to detect a bidirectional displacement amount in the extension direction and the contraction direction only by using one maximum ground storage sensor A. Even in this case, a predetermined amount of displacement is determined due to the difference between the distance from the point C where the transmission plate 13 is fixed to the connection pin 14 and the distance from the point C where the transmission plate 13 is fixed to the transmission pin 15. Scaling is done.
[0019]
【The invention's effect】
In the attachment structure of the maximum value storage sensor of the present invention, when connecting the slide member and the slider, the magnification change means for changing the displacement of the slide member and displacing the slider is attached. The displacement can be arbitrarily scaled and transmitted to the maximum value memory sensor. As a result, the single maximum value storage sensor can be widely used regardless of the displacement width in the measurement symmetry, and thus the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing an attachment structure of a maximum value storage sensor according to a first embodiment of the present invention.
FIG. 2 is an overall view showing an attachment structure of a maximum value storage sensor according to a second embodiment of the present invention.
FIG. 3 is an enlarged view showing the inside of a sensor box in a maximum value storage sensor mounting structure according to a second embodiment of the present invention.
FIG. 4 is an enlarged view showing the inside of a sensor box in a maximum value storage sensor mounting structure according to a third embodiment of the present invention.
[Explanation of symbols]
1 Connection fitting 2 Continuous pantograph (magnification changing means)
3 Wire (sliding means)
4 Inner rod 5 Outer rod 7 Beam (structural member)
8 pillars (structural members)
13 Transmission plate 14 Connection pin 15 Transmission pin 16 Detection fitting 17 Square hole 18 Notch

Claims (3)

An attachment structure of a maximum value storage sensor including a slider that moves in parallel according to the amount of displacement caused by a change in the distance between two points in a structural member,
The slider is connected to the slide member that is arranged over the entire length of the measurement section to be measured for displacement and slides according to the displacement of the measurement section, and the slider is displaced by changing the displacement of the slide member. A mounting structure for a maximum value storage sensor, which is provided with a zooming unit that is a plurality of pantographs connected in series .   2. The maximum value storage sensor mounting structure according to claim 1, wherein the zooming means is located between the slide member and the slider and connects them together. By being connected to a slide member which slides in accordance with the displacement of the displacement of the amount subject to be disposed over the entire length of the measuring path and the measurement period of the measurement, caused by the distance between two points in the structural member changes A maximum value storage sensor comprising a slider adapted to move in parallel according to the amount of displacement,
It includes a scaling means that connects a plurality of pantographs in series to change the displacement of the slide member to displace the slider.
Maximum value storage sensor.

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