JP6078860B1 - Vibration detection apparatus, vibration characteristic measurement system, and vibration characteristic measurement method - Google Patents

Abstract

Measurement of vibration characteristics at the same time at two or more characteristic measurement points can be realized with less work burden. In a vibration detector 1 that is installed on a surface of a structure and detects vibration for calculating vibration characteristics at a characteristic measurement point of the structure, vibrations at two or more characteristic measurement points on the surface of the structure are provided. More than the number of vibration detection points necessary for calculating the characteristics, the vibration detection units 2 are connected to each other with an interval corresponding to the distance between the vibration detection points on the surface of the structure. It has the connection part 3, It is characterized by the above-mentioned. [Selection] Figure 1

Description

  The present invention relates to a vibration detection device that performs vibration detection to obtain vibration characteristics of a structure, and a vibration characteristic measurement system and a vibration characteristic measurement method that measure the vibration characteristics of a structure based on the vibration detection result. is there.

  Conventionally, in order to grasp the flow of vibration energy in a structure, it is known to measure vibration intensity (vibration energy amount that passes a unit width per unit time) at each location (characteristic measurement point) on the structure. (Patent Document 1).

Japanese Patent No. 5067654

  Generally, in order to measure vibration characteristics such as vibration intensity at one place (characteristic measurement point) on a structure, it is necessary to detect vibrations at two or more points (vibration detection points) on the structure. Become. For example, when measuring the vibration intensity at one characteristic measurement point, it is necessary to measure the vibrations of at least two vibration measurement points located around the characteristic measurement point. A conventional vibration detection device that detects vibrations necessary to measure vibration characteristics such as vibration intensity includes vibration detection units having the number of vibration detection points necessary to measure vibration characteristics at one characteristic measurement point. It was only equipped.

  When using such a conventional vibration detection device to measure vibration characteristics at two or more characteristic measurement points on a structure, vibration characteristics at each characteristic measurement point are changed while changing the installation location of the vibration detection device. It is necessary to repeat the measurement. However, in this case, it is necessary to change the installation location of the vibration detection device every time the vibration characteristic at the characteristic measurement point is measured, and the measurement work becomes complicated. In addition, since vibration characteristics at the same time at two or more characteristic measurement points cannot be measured, irregular vibration characteristics without reproducibility cannot be measured.

  On the other hand, if a number of conventional vibration detection devices are prepared corresponding to the number of characteristic measurement points, and each vibration detection device is installed at an installation location corresponding to each characteristic measurement point, the same vibration detection device at two or more characteristic measurement points is used. It is possible to measure the vibration characteristics of the time. However, even in this case, an operation of installing each vibration detection device at an installation location corresponding to each characteristic measurement point is necessary, and the measurement operation is complicated.

  The present invention has been made in view of the above problems, and the object of the present invention is to provide a vibration detection apparatus that can realize measurement of vibration characteristics at the same time at two or more characteristic measurement points with less work burden, A vibration characteristic measurement system and a vibration characteristic measurement method are provided.

In order to achieve the above object, the invention of claim 1 is provided at one characteristic measurement point that is installed on the surface of a structure and is calculated from vibration detection results of two or more vibration detection points on the surface of the structure. in the vibration detecting device for detecting vibration for calculating the vibration characteristics, a common part of the vibration detection point required for calculating the vibration characteristics in a predetermined number of characteristic measurement point is two or more between characteristics measurement point And detecting the vibration at each vibration detection point by a number of vibration detection units smaller than the total number of necessary vibration detection points, and providing an interval corresponding to the distance between each vibration detection point on the surface of the structure. The vibration detectors are connected to each other by a connecting part .
According to the present invention, even with only one vibration detecting device can be realized to measure the vibration characteristics of the same period of 2 or more characteristics measurement point.
In addition, since the vibration detection units are connected to each other with a distance corresponding to the distance between the vibration detection points on the surface of the structure in advance, when the vibration detection device is installed on the surface of the structure. The operation of positioning the individual vibration detection units at the respective vibration detection points is easy. Therefore, even if many vibration detection parts are provided, the installation work burden is small.

According to a second aspect of the present invention, in the vibration detecting device according to the first aspect, the connecting portion connects the vibration detecting portions so that the relative positions of the vibration detecting portions can be changed. To do.
According to this, since the relative position of each vibration detection part can change, each vibration detection part can be appropriately attached to each vibration detection point on the surface of the structure having various surface shapes. Therefore, vibration characteristics of structures having various surface shapes can be measured.
Further, if the relative position of each vibration detection unit can be changed, for example, the vibration detection device can be made smaller by bending or bending the connecting portion, and a highly portable vibration detection device can be realized.

The invention according to claim 3 is the vibration detecting device according to claim 1 or 2, wherein the connecting portion is formed of a sheet-like member to which each vibration detecting portion is fixed with the space therebetween. It is a feature.
According to this, the structure which mutually connects each vibration detection part with the space | interval according to the distance between each vibration detection point is easily realizable.

According to a fourth aspect of the present invention, in the vibration detection device according to any one of the first to third aspects, the vibration characteristic is a vibration intensity.
According to this, the measurement of the vibration intensity at the same period at two or more characteristic measurement points can be easily realized with less work load.

According to a fifth aspect of the present invention, in the vibration detection device according to any one of the first to fourth aspects, at least a part of the coupling portion has the vibration characteristic on a display surface overlapping the structure. A display means for displaying the calculation result is provided.
According to this, the vibration characteristic of each characteristic measurement point on the surface of the structure can be confirmed on the spot while viewing the surface of the structure. In particular, if the display means has a display surface that overlaps each characteristic measurement point on the surface of the structure, the calculation result of the corresponding vibration characteristic can be displayed at a position that overlaps each characteristic measurement point on the structure. It becomes possible. In this case, it is possible to confirm directly on the surface of the structure what vibration characteristics appear at which point on the surface of the structure, and how vibration is transmitted throughout the structure. Intuitive recognition is possible.

The invention of claim 6 is based on the vibration detection device according to any one of claims 1 to 5 and the vibration detection result of each vibration detection point detected by each vibration detection unit of the vibration detection device. The vibration characteristic measurement system further includes a calculation device that executes calculation processing for calculating vibration characteristics at the two or more characteristic measurement points.
ADVANTAGE OF THE INVENTION According to this invention, the vibration characteristic measuring system which can obtain the vibration characteristic in a characteristic measurement point using the vibration detection apparatus of any one of Claim 1 thru | or 5 can be provided.

The invention according to claim 7 is the vibration characteristic measurement system according to claim 6, wherein the vibration detection device according to claim 5 is used as the vibration detection device, and the arithmetic device is disposed on a surface of the structure. A display control process for displaying a calculation result of a corresponding vibration characteristic at a position overlapping with the two or more characteristic measurement points on the display surface when installed is performed.
According to this, since the calculation result of the corresponding vibration characteristic is displayed at the position overlapping each characteristic measurement point on the structure, what vibration characteristic appears at which point on the surface of the structure, It can be confirmed directly on the surface of the structure. This makes it possible to intuitively recognize how vibrations are transmitted throughout the entire structure.

The invention according to claim 8 is the vibration detection device according to any one of claims 1 to 5 installed on the surface of the structure, and is detected by each vibration detection unit of the vibration detection device. The vibration characteristic measurement method is characterized in that vibration characteristics at the predetermined number of characteristic measurement points are calculated based on a vibration detection result at a vibration detection point.
According to the present invention, even with only one vibration detecting device can be realized to measure the vibration characteristics of the same period of 2 or more characteristics measurement point. In addition, since the vibration detection units are connected to each other with a distance corresponding to the distance between the vibration detection points on the surface of the structure in advance, when the vibration detection device is installed on the surface of the structure. The operation of positioning the individual vibration detection units at the respective vibration detection points is easy. Therefore, even if many vibration detection parts are provided, the installation work burden is small.

  According to the present invention, there is an excellent effect that measurement of vibration characteristics at the same time at two or more characteristic measurement points can be realized with less work load.

It is a mimetic diagram showing the whole vibration intensity measuring system composition in an embodiment. It is explanatory drawing which shows the example which installed the sensor sheet | seat in the side body of a motor vehicle. It is explanatory drawing for demonstrating the measuring method of the vibration intensity in embodiment. It is the figure which showed the experimental result which compares the measurement result of the vibration intensity by embodiment, and the measurement result of the vibration intensity using the conventional expensive vibration sensor. It is a schematic diagram which shows the whole structure of the vibration intensity measurement system in a modification.

Hereinafter, a vibration intensity measurement system as a vibration characteristic measurement system that measures vibration characteristics at a characteristic measurement point on a structure by installing the vibration detection device applied to the present invention on the surface of the structure will be described as an example. An embodiment will be described.
In the present embodiment, the vibration characteristic to be measured is an example of vibration intensity indicating the vibration energy amount passing through the unit width per unit time. However, in order to calculate the vibration characteristic at one characteristic measurement point, 2 is used. Any vibration characteristic that requires two or more vibration detection points is the same as in the present embodiment.
Moreover, the structure of this embodiment should just be an object which wants to know a vibration characteristic, such as a motor vehicle (various vehicle parts, such as a flame | frame, a body, an engine), and household appliances.

FIG. 1 is a schematic diagram showing an overall configuration of a vibration intensity measurement system in the present embodiment.
The vibration intensity measurement system of the present embodiment is mainly composed of a sensor sheet 1 as a vibration detection device and a notebook personal computer (hereinafter referred to as “PC”) 10 as an arithmetic device. Are connected by a communication cable 11 so that data communication is possible.

  The sensor sheet 1 of the present embodiment is installed on the surface of a structure for measuring vibration intensity, and detects vibration for obtaining vibration intensity at a characteristic measurement point on the structure. For example, when measuring the vibration intensity of the body of an automobile, as shown in FIG. 2, the sensor sheet 1 is installed on the body surface of the automobile.

  The sensor sheet 1 in the present embodiment has a large number of vibration sensors 2 as vibration detection units distributed on a sheet surface of a sheet base 3 made of a flexible sheet-like member. With the flexible sheet base material 3, the vibration sensors 2 are connected so that their relative positions can be changed. Accordingly, the relative position of the sheet base material 3 is changed by bending the sheet base material 3 with respect to the structures having various surface shapes, and each vibration sensor 2 is appropriately applied to each vibration detection point on the surface having various shapes. Contact. Therefore, according to the sensor sheet 1 of the present embodiment, not only a specific part of the automobile (side body as shown in FIG. 2) but also a car bonnet, a ceiling body, or an automobile whose surface shape is different from that part. The same sensor sheet 1 can also be used for measurement of vibration intensity of an electrical appliance (such as a refrigerator).

  For example, a cloth or a thin polypropylene film can be used as the sheet substrate 3 of the present embodiment, but a polypropylene film is employed in the present embodiment. In addition, if each vibration sensor 2 is connected so that the mutual relative position can be changed, a configuration in which the vibration sensors 2 are connected by a high-rigidity member (for example, a chain-like member) provided with a movable portion is adopted. May be. Moreover, if each vibration sensor 2 is connected so that the relative position of each vibration sensor 2 can be changed as in the sensor sheet 1 of the present embodiment, the sheet base material 3 can be rounded or bent to be small. Therefore, the sensor sheet 1 with high portability can be realized. However, it is not always necessary to connect the vibration sensors 2 so that their relative positions can be changed. If the surface of the structure has a predetermined surface shape (a flat surface, a curved surface with a fixed curvature, etc.) You may comprise the sheet | seat base material 3 with the non-flexible member or high-rigidity member of the fixed shape which can contact each vibration sensor 2 appropriately on the surface.

  Further, the sheet base material 3 is preferably as light as possible in order to minimize the influence on vibration transmitted to the structure even if it is installed on the surface of the structure.

  In addition, the sensor sheet 1 of the present embodiment is fixed on the sheet surface of the sheet substrate 3 with an interval corresponding to the distance between each vibration detection point on the surface of the structure. As a result, each vibration sensor 2 can open the distance between the vibration detection points by simply installing the sensor sheet 1 so that the entire sheet surface of the sensor sheet 1 contacts the surface of the structure. And is positioned at each vibration detection point. Therefore, the installation work is very simple.

  In addition, in this embodiment, although the structure which mutually connects each vibration sensor 2 with the sheet | seat base material 3 is employ | adopted, the connection part which connects each vibration sensor 2 mutually is not restricted to this. For example, the vibration sensors 2 may be connected to each other by a wire or the like to be a mesh-like vibration detection device.

  Each vibration sensor 2 detects the vibration at each vibration detection point necessary for calculating the vibration intensity at the characteristic measurement point on the surface of the structure, and the vibration detection point on the surface of the structure is detected. Any device that can detect displacement, velocity, acceleration, and the like may be used. Therefore, a known pressure sensor, an acceleration sensor, or the like can be used as the vibration sensor 2, and a MEMS (Micro Electro Mechanical Systems) type acceleration sensor is relatively inexpensive but is inexpensive and suitable. Available to:

  The vibration intensity measurement system of the present embodiment grasps the vibration transmission path (flow of vibration energy) over a wide range of the structure by overviewing a wide range of vibration intensity on the surface of the structure as a whole. Is. In this case, it is possible to obtain vibration intensity at a large number of characteristic measurement points with a narrow interval between characteristic measurement points, even if accuracy is low, rather than obtaining high-precision vibration intensity at individual characteristic measurement points as in the past. is important. In particular, when measuring the vibration intensity over a wide range on the structure as in this embodiment, it is important to have an overview of the wide range of vibration intensity as a whole, and a small number of characteristic measurement points (with wide intervals). Rather than obtaining high-precision vibration intensity at a characteristic measurement point), it is better to obtain low-precision vibration intensity at a large number of characteristic measurement points (characteristic measurement points with a narrow interval). There is a great merit in terms of cost as well as properly grasping how vibration energy flows. Therefore, the vibration sensor 2 is preferably an inexpensive sensor with relatively low accuracy, and it is preferable to arrange the sensors closely.

  The sensor sheet 1 in the present embodiment includes vibration sensors 2 that are equal to or more than the number of vibration detection points necessary for calculating the vibration intensity of two or more characteristic measurement points on the surface of the structure. In this embodiment, since a four-point method described later is adopted as a vibration intensity measurement method, four vibration detection points are required to calculate the vibration intensity at one characteristic measurement point. In order to calculate the vibration intensity at the above characteristic measurement points, at least five vibration detection points are required. Therefore, in the present embodiment that employs the four-point method as the vibration intensity measurement method, at least five or more vibration sensors 2 are mounted on the sensor sheet 1.

  The sensor sheet 1 is installed on the surface of the structure, and the vibration detected at the vibration detection point on the surface of the structure is detected by each vibration sensor 2, and the result is sent from the sensor sheet 1 to the personal computer 10 via the communication cable 11. It is done. The personal computer 10 executes a measurement program stored in a storage unit such as a memory by an arithmetic processing unit such as a CPU, so that vibrations at each characteristic measurement point are detected from vibration detection results at each vibration detection point received from the sensor sheet 1. Intensity (vector quantity) is calculated, and the calculation result is displayed on the monitor 12. The measurement program of this embodiment processes data input from the communication cable 11, FFT calculation, vibration intensity calculation, and display processing in this order.

FIG. 3 is an explanatory diagram for explaining a method for measuring vibration intensity in the present embodiment.
In the present embodiment, a four-point method is adopted as a vibration intensity measurement method. Specifically, as shown in FIG. 3, the vibration detection results of the four vibration sensors 2A, 2B, 2C, and 2D on the sensor sheet 1 respectively installed at the four vibration detection points on the surface of the structure are used. The vibration intensity at the intersection (characteristic measurement point) between the x axis passing through the vibration sensors 2A and 2B and the y axis passing through the vibration sensors 2C and 2D is calculated.

Here, the x-axis direction component of the vibration intensity at the characteristic measurement point (intersection point) can be obtained from the following equation (1). In the following formula (1), “ω” represents an angular frequency, “Q” represents a shear force, “ζ” represents a bending displacement, “M” represents a bending moment, and “θ” represents an angle. “Re” represents a real part, “j” represents a complex unit, and “*” represents a complex conjugate. As the bending displacement ζ, an average value of the bending displacements ζ ₁ and ζ ₂ detected by the two vibration sensors 2A and 2B is used. The angular displacement θ can be obtained from ∂ζ / ∂x, but here, a result approximated by a finite difference is used.

The y-axis direction component of the vibration intensity at the characteristic measurement point (intersection point) is also calculated from the detection results of the two vibration sensors 2C and 2D using the same method as the x-axis direction component.
Thus, by calculating the x-axis direction component and the y-axis direction component of the vibration intensity, a vector quantity indicating the magnitude and direction of the vibration intensity at the characteristic measurement point (intersection) can be obtained.

As described above, the sensor sheet 1 used in the vibration intensity measurement system of the present embodiment can easily measure the vibration intensity at the same time for two or more characteristic measurement points on the structure. .
As a result of research, the present inventors have obtained a highly accurate vibration characteristic at each characteristic measurement point when measuring vibration characteristics such as vibration intensity at two or more characteristic measurement points on the structure. We obtained the knowledge that it is more important to obtain vibration characteristics at more characteristic measurement points even if it is low. In particular, when measuring vibration characteristics over a wide range on a structure, it is important to have an overview of the wide range of vibration characteristics, and there are many characteristics rather than obtaining highly accurate vibration characteristics at a small number of characteristic measurement points. The merit of obtaining vibration characteristics with low accuracy at the measurement point is great.

  Based on such knowledge, the vibration detection device according to the present invention such as the sensor sheet 1 uses an inexpensive device with relatively low accuracy as a vibration detection unit that detects vibration for obtaining the vibration characteristics of the characteristic measurement point. This is achieved by obtaining a new focus that can be obtained, and is provided with more vibration detection units than the number of vibration detection points necessary for calculating vibration characteristics at two or more characteristic measurement points. As a result, it is possible to measure vibration characteristics at the same time at two or more characteristic measurement points with an inexpensive vibration detection apparatus, so that there is less economic burden and the realization thereof becomes easier.

  In addition, since the vibration detection units are connected to each other with an interval corresponding to the distance between the vibration detection points on the surface of the structure, when the vibration detection device is installed on the surface of the structure, The operation of positioning the vibration detection unit at each vibration detection point is easy. Therefore, even if many vibration detection parts are provided, the installation work burden is small.

FIG. 4 shows an experimental result comparing the measurement result of the vibration intensity in the sensor sheet 1 of the present embodiment using the inexpensive vibration sensor 2 with the measurement result of the vibration intensity using the conventional expensive vibration sensor. FIG.
In FIG. 4, the horizontal axis represents the x-axis direction position on the surface of the structure, the vertical axis represents the y-axis direction position on the surface of the structure, and vibration at each characteristic measurement point on the surface of the structure. Intensity (vector quantity) is indicated by an arrow. The starting point of each arrow in FIG. 4 is a characteristic measurement point.

  As the structure, an acrylic flat plate having a size of 320 mm × 70 mm and a thickness of 2 mm was used, and the center P at one end in the longitudinal direction of the acrylic flat plate was randomly vibrated to 1 kHz with a vibrator. The other end in the longitudinal direction of the acrylic flat plate is free.

  In the sensor sheet 1 of the present embodiment, vibration sensors 2 made of an inexpensive MEMS type acceleration sensor are arranged in a grid of 4 × 4, and the sensor sheet 1 is attached to one surface of an acrylic flat plate, The vibration intensity at the nine characteristic measurement points shown in FIG. 4 was measured. The vibration intensity at each characteristic measurement point (solid line in FIG. 4) was calculated from the vibration detection results of the four vibration sensors 2 adjacent to each of the characteristic measurement points.

  On the other hand, in the measurement of vibration intensity using a conventional expensive vibration sensor, a single vibration sensor is used, and the vibration sensor is placed on the vibration detection point on the surface opposite to the surface on which the sensor sheet 1 is attached. After installing and detecting vibration, the operation of moving the vibration sensor to the next vibration detection point and detecting vibration was repeated. Thereby, 16 vibrations corresponding to the back surface of the 16 vibration sensors 2 mounted on the sensor sheet 1 are sequentially detected by a single vibration sensor, and from the detection result, the sensor sheet 1 of the present embodiment is detected. The vibration intensity (broken line in FIG. 4) at the same point as the nine characteristic measurement points measured by is calculated.

  According to the experimental results, the measurement results of the vibration intensity of both vibration frequencies showed almost the same tendency although there was some deviation in the magnitude and direction. As a result, when an inexpensive vibration sensor 2 such as the sensor sheet 1 of the present embodiment is used, the vibration intensity cannot be measured with higher accuracy as the measurement result of the expensive vibration sensor, but on the surface of the structure. It was confirmed that the vibration intensity was sufficient for an overview.

[Modification]
Next, a modification of the vibration intensity measurement system in the present embodiment will be described.
FIG. 5 is a schematic diagram showing the overall configuration of the vibration intensity measurement system in the present modification.
In the vibration intensity measurement system of this modification, a display panel 20 as a display unit is provided on a sensor sheet 1 as a vibration detection device, and a measurement result of vibration intensity is displayed on the display surface 22 of the display panel 20. This is different from the above-described embodiment. However, since the other points are the same as those of the above-described embodiment, the following description will focus on points different from the above-described embodiment.

  The vibration intensity measurement system of the present modification mainly includes a sensor sheet 1, a display panel 20 provided on the sensor sheet 1, and a personal computer 10. The sensor sheet 1 and the personal computer 10 are connected by a communication cable 11 so that data communication is possible, and the display panel 20 and the personal computer 10 are connected by a communication cable 21 so that data communication is possible. In the present modification, the sensor sheet 1 and the display panel 20 constitute a vibration detection device.

  The sensor sheet 1 of this modification is the same as that of the above-described embodiment, and a large number of vibration sensors 2 are provided on the surface (sensor arrangement surface) of the flexible sheet substrate 3 that faces the surface of the structure. Distributed. In this modification, the display panel 20 is provided on the surface of the sensor sheet 1 opposite to the sensor arrangement surface.

  The display panel 20 of the present modification is provided so as to overlap the entire measurement region where many characteristic measurement points exist on the surface of the structure when the sensor sheet 1 is installed on the surface of the structure. Yes. Also in this modified example, the sheet base material 3 that connects the vibration sensors 2 is flexible so that the vibration sensors 2 are appropriately in contact with the surfaces of the structures having various surface shapes. The display panel 20 disposed so as to overlap the sensor sheet 1 preferably has flexibility. That is, it is preferable that the display panel 20 of the present modification has a configuration that does not hinder the relative position change of each vibration sensor 2. As such a display panel 20, a flexible liquid crystal panel, an organic EL panel, etc. can be utilized suitably.

  This modification is an example in which the display panel 20 is provided so as to overlap the entire measurement region. However, when the display panel 20 is provided on the sensor sheet 1 outside the measurement region, the display panel 20 is not necessarily flexible. There is no need to use anything. Of course, the display panel 20 does not need to be flexible even when the sheet base material 3 connecting the vibration sensors 2 is made of a non-flexible material or a highly rigid material.

  In this modification, the sensor sheet 1 provided with the display panel 20 is installed on the surface of a structure (a side body of an automobile in the example of FIG. 5). And the result of having detected the vibration of the vibration detection point on the surface of the structure by each vibration sensor 2 is sent from the sensor sheet 1 to the personal computer 10 through the communication cable 11. In the personal computer 10, the vibration intensity (vector amount) at each characteristic measurement point is calculated from the vibration detection result at each vibration detection point received from the sensor sheet 1 by executing the measurement program as in the above-described embodiment. The calculation result is displayed on the monitor 12.

  Furthermore, the personal computer 10 of the present modification controls the display panel 20 on the sensor sheet 1 via the communication cable 21, and each position on the display surface 22 that overlaps with the characteristic measurement point on the surface of the structure is provided. Display control processing for displaying the calculation result of the vibration intensity corresponding to the characteristic measurement point is executed. Thereby, in this modification, as shown in FIG. 5, the arrow image indicating the calculation result of the vibration intensity at the characteristic measurement point on the surface of the structure is displayed so as to overlap the actual characteristic measurement point. . This makes it possible to confirm directly on the surface of the structure what vibration intensity appears at which point on the surface of the structure. Can be recognized intuitively.

DESCRIPTION OF SYMBOLS 1 Sensor sheet 2 Vibration sensor 3 Sheet | seat base material 10 Personal computer 11 Communication cable 12 Monitor 20 Display panel 21 Communication cable 22 Display surface

Claims (8)

In a vibration detection device that detects vibration for calculating a vibration characteristic at one characteristic measurement point that is installed on the surface of a structure and is calculated from vibration detection results of two or more vibration detection points on the surface of the structure ,
Commonly the part of the vibration detection point required for calculating the vibration characteristics in a predetermined number of characteristic measurement point is two or more between characteristics measurement point, fewer than the total number of the required vibration detection point The vibration detector detects the vibration at each vibration detection point ,
A vibration detection apparatus, wherein the vibration detection units are connected to each other by a connection unit at an interval corresponding to the distance between the vibration detection points on the surface of the structure. The vibration detection apparatus according to claim 1,
The said connection part connects each vibration detection part so that the relative position of each vibration detection part can change, The vibration detection apparatus characterized by the above-mentioned. In the vibration detection apparatus according to claim 1 or 2,
The vibration detecting apparatus according to claim 1, wherein the connecting portion is formed of a sheet-like member to which the vibration detecting portions are fixed at the intervals. In the vibration detection device according to any one of claims 1 to 3,
The vibration detection apparatus characterized in that the vibration characteristic is vibration intensity. The vibration detection apparatus according to any one of claims 1 to 4,
At least a part of the connecting portion is provided with a display means for displaying a calculation result of the vibration characteristic on a display surface overlapping the structure. The vibration detection apparatus according to any one of claims 1 to 5,
An arithmetic unit that executes arithmetic processing for calculating vibration characteristics at the two or more characteristic measurement points based on vibration detection results at the respective vibration detection points detected by the respective vibration detection units of the vibration detection device. Characteristic vibration characteristic measurement system. The vibration characteristic measurement system according to claim 6,
The vibration detection device according to claim 5 is used as the vibration detection device.
The calculation device executes a display control process for displaying a calculation result of a corresponding vibration characteristic at a position overlapping the two or more characteristic measurement points on the display surface when the calculation device is installed on the surface of the structure. Characteristic vibration characteristic measurement system. The vibration detection device according to any one of claims 1 to 5 is installed on a surface of the structure,
A vibration characteristic measurement method, comprising: calculating vibration characteristics at the predetermined number of characteristic measurement points based on vibration detection results of the vibration detection points detected by the vibration detection units of the vibration detection device.

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