JP2015102363A - Vibration analysis device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that the accuracy of a diagnostic result about a structure is reduced under the influence of noise exerted on the measured value of a vibrometer.SOLUTION: A vibration analysis device according to the present invention has vibration measurement means, feature amount calculation means, region division means, and diagnosis means. The vibration measurement means measures a vibration waveform at a plurality of measurement points set on a structure. The feature amount calculation means calculates the feature amount of the vibration waveform for each measurement point. The region division means divides a region formed by the plurality of measurement points into subregions including the measurement points for which a feature amount, among the feature amounts of the vibration waveform, that satisfies a prescribed condition is calculated. The diagnosis means diagnoses the structure on the basis of the result of division.

Description

  The present invention relates to a vibration analysis apparatus, a vibration analysis method, and a program for measuring and analyzing a vibration waveform of a structure.

  Various vibration analysis apparatuses have been proposed for diagnosing structures by measuring vibration waveforms of structures such as bridges.

  For example, measure the vibration waveform at a measurement point set on a civil engineering building structure with a non-contact vibrometer such as a CCD camera to detect the natural frequency of the structure and compare it with the natural frequency in a normal state Therefore, it is proposed as a first related technique related to the present invention to determine deterioration of a structure (see, for example, Patent Document 1).

  In addition, the vibration waveform at the measurement point set on the structure is measured with a non-contact vibrometer such as a laser Doppler vibrometer to measure the vibration characteristics such as the natural frequency and natural vibration mode of the structure. Inspecting the soundness level is proposed as a second related technique related to the present invention (see, for example, Patent Document 2).

  In addition, earthquake recorders are installed at several locations in the building and the foundation of the building, and immediately after the earthquake, the input seismic waves obtained from the earthquake recorder at the foundation and the earthquake recorder in the building can be obtained. The transfer function of the response waveform is obtained, and this transfer function is compared with the transfer function of the building before the earthquake occurs to determine whether the building has been damaged, the degree of damage to the building, or the location of the damage. Has been proposed as a third related technique related to the present invention (see, for example, Patent Document 3).

Japanese Patent No. 3404302 Japanese Patent No. 4001806 JP-A-11-44615

  Regardless of whether the vibration waveform of a structure is measured with a contact-type vibrometer or with a non-contact vibrometer, there are few cases in which the vibrometer shows an incorrect value due to the effects of accidental noise. Occur. However, in the first to third related technologies related to the present invention, if the measurement value of the vibrometer becomes an invalid value due to the influence of noise, the accuracy of the diagnosis result of the structure is lowered. The reason is that the first to third related techniques perform analysis processing on the premise that the measured values of the individual vibrometers used for analysis are accurate. For this reason, it is necessary to acquire a stable vibration waveform that does not include sudden noise over a certain period of time, and the measurement time by the vibrometer must be long.

  An object of the present invention is to provide a vibration analysis apparatus that solves the above-described problem, that is, the problem that the accuracy of a diagnosis result of a structure is lowered due to the influence of noise on a measurement value of a vibrometer.

The vibration analysis apparatus according to the first aspect of the present invention includes:
Vibration measuring means for measuring vibration waveforms at a plurality of measurement points set on the structure;
Feature quantity calculating means for calculating the feature quantity of the vibration waveform for each measurement point;
A region dividing means for dividing the region formed by the plurality of measurement points into partial regions including measurement points at which feature amounts satisfying a predetermined condition among the feature amounts of the vibration waveform are calculated;
Diagnostic means for diagnosing the structure based on the result of the division.

The vibration analysis method according to the second aspect of the present invention includes:
A vibration analysis method executed by a vibration analyzer,
Measure vibration waveforms at multiple measurement points set on the structure,
Calculate the feature value of the vibration waveform for each measurement point,
Dividing the region formed by the plurality of measurement points into partial regions including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated;
The structure is diagnosed based on the result of the division.

The program according to the third aspect of the present invention is:
Computer
Vibration measuring means for measuring vibration waveforms at a plurality of measurement points set on the structure;
Feature quantity calculating means for calculating the feature quantity of the vibration waveform for each measurement point;
A region dividing means for dividing the region formed by the plurality of measurement points into partial regions including measurement points at which feature amounts satisfying a predetermined condition among the feature amounts of the vibration waveform are calculated;
Based on the result of the division, it functions as a diagnostic means for diagnosing the structure.

  Since the present invention has the above-described configuration, the accuracy of the diagnosis result of the structure is not lowered due to the influence of noise on the measurement value of the vibrometer, and a robust diagnosis against noise becomes possible.

It is a figure which shows the vibration analyzer which concerns on the 1st Embodiment of this invention, and the structure used as a diagnostic object. 1 is a block diagram of a vibration analysis apparatus according to a first embodiment of the present invention. It is a figure which shows the structural example of the measurement point data in the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a figure which shows the structural example of the vibration measurement data in the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a figure which shows the structural example of the feature-value data of the vibration waveform in the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a figure which shows the structural example of the partial region data in the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a schematic diagram explaining the effect of the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a schematic diagram explaining the effect of the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a schematic diagram explaining the effect of the vibration analyzer which concerns on the 1st Embodiment of this invention. It is a block diagram of the vibration analyzer which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structural example of the smooth feature-value data in the vibration analyzer which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the vibration analyzer which concerns on the 2nd Embodiment of this invention. It is a block diagram of the vibration analyzer which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the vibration analyzer which concerns on the 3rd Embodiment of this invention. It is a block diagram of the vibration analyzer which concerns on the 4th Embodiment of this invention. It is a flowchart which shows operation | movement of the vibration analyzer which concerns on the 4th Embodiment of this invention. It is a block diagram of the vibration analyzer which concerns on the 5th Embodiment of this invention. It is a flowchart which shows operation | movement of the vibration analyzer which concerns on the 5th Embodiment of this invention. It is a block diagram of the vibration analyzer which concerns on the 6th Embodiment of this invention. It is a flowchart which shows operation | movement of the vibration analyzer which concerns on the 6th Embodiment of this invention.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
Referring to FIG. 1, the vibration analysis apparatus 100 according to the first embodiment of the present invention has a function of diagnosing the structure 110 by measuring the vibration of the structure 110.

  The structure 110 is a civil engineering building such as a bridge. Alternatively, the structure 110 may be a structure other than a civil engineering building such as an industrial product such as an automobile or a train. The diagnosis of the structure 110 performed by the vibration analysis apparatus 100 may be, for example, deterioration of the strength of the structure 110, peeling or floating of a surface or the like, presence or absence of a crack, or the like.

  In the diagnosis of the structure 110, the vibration analysis apparatus 100 first measures vibration waveforms at a plurality of measurement points 111 set on the structure 110. Next, the vibration analysis apparatus 100 calculates the characteristic amount of the measured vibration waveform for each measurement point 111. Next, the vibration analysis apparatus 100 divides a region formed by the plurality of measurement points 111 into partial regions that satisfy the uniformity of the feature value of the vibration waveform based on the feature values of the vibration waveform for each measurement point. The vibration analysis apparatus 100 diagnoses the structure 110 based on the result of the division.

  Referring to FIG. 2, the vibration analysis apparatus 100 includes a vibrometer 101, a communication interface unit (hereinafter referred to as a communication I / F unit) 102, an operation input unit 103, a screen display unit 104, a storage unit 105, and an arithmetic processing unit. 106.

  The vibrometer 101 has a function of measuring vibration waveforms at a plurality of measurement points set on the structure 110. The vibrometer 101 may be a contact vibrometer or a non-contact vibrometer. The contact-type vibrometer may use a piezoelectric element. The vibration-type vibration meter may use an acceleration sensor or a speed sensor such as a moving coil type or a servo type. On the other hand, the non-contact type vibrometer may be a camera imaging system such as a CCD camera or a laser Doppler vibrometer. Further, in the camera imaging method, when a decrease in resolution becomes a problem in long-distance observation, a high resolution method such as a sampling moire method may be used in combination.

  The communication I / F unit 102 includes a dedicated data communication circuit and has a function of performing data communication with various devices connected via a communication line.

  The operation input unit 103 includes an operation input device such as a keyboard and a mouse, and has a function of detecting an operator operation and outputting the operation to the arithmetic processing unit 106.

  The screen display unit 104 includes a screen display device such as an LCD (Liquid Crystal Display) or a PDP (Plasma Display Panel), and has a function of displaying various information such as diagnosis results on the screen in accordance with instructions from the arithmetic processing unit 106. Have.

  The storage unit 105 includes a storage device such as a hard disk or a memory, and has a function of storing processing information and programs 105P necessary for various processes in the arithmetic processing unit 106. The program 105P is a program that realizes various processing units by being read and executed by the arithmetic processing unit 106, and an external device (not shown) or the like via a data input / output function such as the communication I / F unit 102. It is read in advance from a storage medium (not shown) and stored in the storage unit 105. Main processing information stored in the storage unit 105 includes measurement point data 105A, vibration measurement data 105B, feature amount data 105C, and partial area data 105D.

  The measurement point data 105 </ b> A is position information of the measurement point 111 set on the structure 100. FIG. 3 shows a configuration example of the measurement point data 105A. In the measurement point data 105A, for each measurement point 111, a measurement point ID that is identification information and position information are stored. In the specific example shown in FIG. 3, the coordinate information of the XYZ coordinate system set in the space where the structure 110 exists is used as the position information of the measurement point.

  The vibration measurement data 105 </ b> B is vibration waveform measurement data at a measurement point of the structure 100 measured by the vibration meter 101. FIG. 4 shows a configuration example of the vibration measurement data 105B. In the vibration measurement data 105B, for each measurement point 111, a measurement point ID as identification information and a measurement value V as a measurement result are stored. Here, the measured value V is, for example, a time history waveform in which a vibration waveform is recorded together with time information.

  The feature amount data 105C is feature amount data of the vibration waveform calculated from the measurement data at the measurement point. FIG. 5 shows a configuration example of the feature amount data 105C. In the feature amount data 105C, for each measurement point 111, a measurement point ID as identification information and one or more types of feature amounts F are stored. The type of feature amount is arbitrary. For example, the maximum amplitude and phase of the vibration waveform, the frequency spectrum of the vibration waveform, the natural frequency, and the like may be used as the feature amount.

  The partial area data 105D is data obtained as a result of dividing an area formed by a plurality of measurement points into partial areas that satisfy the uniformity of the feature quantity based on the feature quantity of the vibration waveform for each measurement point. FIG. 6 shows a configuration example of the partial area data 105D. The partial area data 105D stores, for each partial area, a partial area ID that is identification information and a list of measurement point IDs of measurement points grouped in the partial area.

  The arithmetic processing unit 106 has a microprocessor such as an MPU and its peripheral circuits, and reads and executes the program 105P from the storage unit 105, thereby realizing various processing units by cooperating the hardware and the program 105P. It has a function to do. As main processing units realized by the arithmetic processing unit 106, there are a vibration measuring unit 106A, a feature amount calculating unit 106B, an area dividing unit 106C, and a diagnostic unit 106D.

  The vibration measurement unit 106 </ b> A has a function of measuring vibration waveforms at a plurality of measurement points 111 set on the structure 110 using the vibrometer 101. Position information of the measurement point 111 on the structure 110 measured by the vibration measurement unit 106A using the vibration meter 101 is stored in the measurement point data 105A. When a non-contact type vibrometer such as a CCD camera or a laser Doppler vibrometer is used as the vibrometer 101, the vibration measuring unit 106A determines the measurement point according to the position information in the measurement point data 105A stored in the storage unit 105. Optically collimate with a non-contact type vibrometer, and vibration waveform data at the measurement point is extracted electrically. The distance between the measurement points 111 on the structure 110 determines the minimum size of the abnormal region that can be detected. The shorter the distance between the measurement points and the higher the measurement points are set, the smaller the abnormal area can be detected. Therefore, it is desirable that the distance between the measurement points is sufficiently shorter than the minimum size of the abnormal region to be detected.

  It is desirable that the vibration measurement unit 106 </ b> A simultaneously measures vibration waveforms at a plurality of measurement points 111 using the vibrometer 101. However, it is not always necessary to measure simultaneously. The vibration waveform measured by the vibration measuring unit 106A using the vibrometer 101 may be a vibration waveform of the structure 110 when an artificial vibration such as a vehicle running or a hitting vibration is applied, or such a population. It may be a vibration waveform of the structure 110 that is always generated in a state where there is no typical vibration. Further, the direction of vibration measured by the vibration measuring unit 106A using the vibrometer 101 is arbitrary as long as it is substantially the same between adjacent measurement points. For example, when the vibration waveform of the structure 110 is measured using a contact-type vibrometer, the vibration waveforms of three components (east-west direction, north-south direction, top-and-bottom direction, etc.) orthogonal to each other may be measured. Alternatively, when a non-contact type vibrometer such as a CCD camera is used, a vibration waveform in a direction orthogonal to a line connecting the vibrometer and the measurement point is measured. In the measurement by the laser Doppler vibrometer, the vibration waveform in the direction parallel to the line connecting the vibrometer and the measurement point is measured. Of course, it is also possible to measure a plurality of vibration waveforms of different directions by installing a plurality of non-contact type vibrometers at different locations and simultaneously measuring the vibration waveforms at the same measurement point. The sampling frequency for vibration measurement is desirably at least twice the vibration frequency generated in the structure 110. In addition, it is desirable that the vibration measurement time length is such that a steady spectrum can be obtained when frequency spectrum analysis is performed based on the measured vibration waveform.

  When the vibration measurement unit 106A completes the measurement of the vibration waveform, the measurement point ID is added to the measurement value for each measurement point, and the vibration measurement data 105B is stored in the storage unit 105.

  The feature amount calculation unit 106B has a function of reading the vibration measurement data 105B from the storage unit 105 and calculating the feature amount of the measured vibration waveform for each measurement point. The type and number of feature quantities to be calculated are arbitrary. For example, the maximum amplitude and phase of the vibration waveform, the frequency spectrum of the vibration waveform, the natural frequency, and the like may be calculated as the feature amount.

  When the feature amount calculation unit 106B completes the calculation of the feature amount of the vibration waveform, the feature amount calculation unit 106B adds the measurement point ID to the feature amount for each measurement point, and stores the feature amount data 105C in the storage unit 105.

  The region dividing unit 106C reads the measurement point data 105A and the feature amount data 105C from the storage unit 105, and based on the feature amount of the vibration waveform for each measurement point, the region formed by the plurality of measurement points is converted into the feature amount. It has a function of dividing into partial regions that satisfy the uniformity. In other words, the area dividing unit 106C has a clustering function that divides a plurality of measurement points into a plurality of clusters based on the position information of the measurement points and the feature amount of the vibration waveform of the measurement points.

  Generally, there are a hierarchical method and a non-hierarchical method as a clustering method for dividing a data set into several clusters according to the degree of similarity. Typical examples of the hierarchical method include the shortest distance method, the longest distance method, the median method, the center of gravity method, the group average method, the Ward method, and the variable method. Representative examples of non-hierarchical methods include the K-Means method and the self-organizing map method. Such an existing clustering method may be used in the above division in the area dividing unit 106C.

  Further, if each measurement point is a pixel, a feature amount of each measurement point is a feature amount of each pixel, and a set of each measurement point is an image, the above-described division performed by the region dividing unit 106C is equivalent to the region division of the image. . Therefore, the above-described division can be performed using an existing algorithm for dividing an image region, for example, a region growing method or a division integration method.

  When the region dividing process is completed, the region dividing unit 106C stores information on the partial region generated by the division in the storage unit 105 as partial region data 105D.

  The diagnosis unit 106D has a function of reading the measurement point data 105A, the feature amount data 105C, and the partial region data 105D from the storage unit 105, and diagnosing the structure 110 based on these data.

  For example, the diagnosis unit 106D may diagnose the structure 110 based on the number of partial areas described in the partial area data 105. For example, when the surface on the structure 110 where a plurality of measurement points are set is a uniform surface formed of concrete or the like, all the measurement points are in the same partial area if there is no separation or floating of the surfaces. Will be included. However, if peeling or floating occurs on a part of the surface, the surface is divided into two or more partial regions. The reason is that the location where peeling or the like occurs often has different vibration characteristics from other normal locations. Accordingly, the structure 110 can be diagnosed based on the number of generated partial regions. Further, the number of deteriorated portions where peeling or the like has occurred can be specified from the number of partial regions.

  The diagnosis unit 106D diagnoses the structure 110 based on the number of partial areas described in the partial area data 105 and the position information of the measurement points included in the partial areas (described in the measurement point data 105A). You can do it. For example, when the surface on the structure 110 on which a plurality of measurement points are set as described above is a uniform surface formed of concrete or the like, all the measurement points are present if there is no peeling or floating of the surface or the like. Are included in the same partial area. However, if peeling or floating occurs on a part of the surface, the surface is divided into two or more partial regions. In addition, since peeling and floating of the surface and the like often occur in limited places with respect to the whole, each of the partial areas with a small ratio of the area to the whole becomes a deteriorated place such as peeling or floating. Equivalent to. For this reason, it is possible to specify the number and position of deterioration.

  When the diagnosis unit 106 </ b> D calculates the diagnosis result of the structure 110, the diagnosis unit 106 </ b> D displays the diagnosis result on the screen display unit 104 or transmits it to an external device through the communication I / F unit 102.

  FIG. 7 is a flowchart showing the operation of the vibration analyzing apparatus 100 according to the present embodiment. Hereinafter, the operation of the vibration analysis apparatus 100 will be described with reference to FIG.

  First, the vibration measuring unit 106A of the vibration analyzing apparatus 100 reads the measurement point data 105A from the storage unit 105, and the vibration waveform of the structure 110 at the plurality of measurement points 111 recorded in the measurement point data 105A is displayed on the vibrometer 101. The measurement result is stored in the storage unit 105 as vibration measurement data 105B (step S101).

  Next, the feature amount calculation unit 106B reads the vibration measurement data 105B from the storage unit 105, calculates a predetermined feature amount from the measured value of the measured vibration waveform for each measurement point, and uses the calculation result as the feature amount data. 105C is stored in the storage unit (step S102).

  Next, the area dividing unit 106C reads the measurement point data 105A and the feature amount data 105C from the storage unit 105, and is recorded in the position information and feature amount data 105C of each measurement point recorded in the measurement point data 105A. Based on the feature quantity of the vibration waveform at each measurement point, the area formed by the plurality of measurement points is divided into partial areas that satisfy the uniformity of the feature quantity, and the division result is stored as partial area data 105D. 105 (step S103).

  Finally, the diagnosis unit 106D reads the measurement point data 105A, the feature amount data 105C, and the partial region data 105D from the storage unit 105, diagnoses the structure 110 based on these data, and displays the diagnosis result on the screen display unit. 104, or is transmitted from the communication I / F unit 102 to the outside (step S104).

  As described above, according to the present embodiment, the influence of noise on the measurement value of the vibrometer does not immediately affect the diagnosis result of the structure 110, and a robust diagnosis against noise becomes possible. The reason is that the region dividing unit 106C divides the region formed by the plurality of measurement points into partial regions that satisfy the uniformity of the feature amount based on the feature values of the vibration waveform for each measurement point, and the diagnosis unit 106D. This is because the structure 110 is diagnosed based on the result of the division.

  8 to 10 are schematic diagrams for explaining the effect of this embodiment. Each of a large number of small rectangles in FIG. 8 indicates a measurement point set on the structure 100. FIG. 9 schematically shows the feature amount of the vibration waveform measured at each measurement point. In FIG. 9, a plurality of small rectangles filled in with black represent measurement points at which feature amounts of vibration waveforms that are the same or similar to each other are calculated. In FIG. 9, a plurality of small rectangles that are hatched represent measurement points that are affected by sudden noise during vibration measurement. Further, in FIG. 9, a plurality of small rectangles that are not painted black and not hatched are feature quantities of vibration waveforms that are the same or similar to each other (however, feature quantities of a plurality of small rectangles painted black) Represents a measurement point for which “not similar” is calculated.

  FIG. 10 shows an example of area division by the area division unit 106C. A central portion where a plurality of small rectangles painted black are densely gathered is divided as one partial region 111, and a region other than the partial region is divided as another partial region 112. As described above, since the area dividing unit 106C performs area division not in units of measurement points but in units of clusters (partial areas), there are a plurality of measurement points having different vibration waveform feature values at each adjacent point. In some cases, they are finally classified into the same cluster (same partial region). As a result, it is possible to make a robust diagnosis against noise.

  On the other hand, in the first to third related technologies related to the present invention, since the diagnosis on the structure 110 is performed from the feature value of the vibration waveform at each measurement point without dividing the region, it is abrupt. If the vibration measurement values at some measurement points are not correct due to noise, it may be possible to judge abnormal parts as normal or normal parts as abnormal, making it difficult to make robust diagnosis against noise. is there.

[Second Embodiment]
Referring to FIG. 11, a vibration analysis apparatus 200 according to the second embodiment of the present invention includes a vibration meter 201, a communication I / F unit 202, an operation input unit 203, a screen display unit 204, a storage unit 205, and an arithmetic process. Part 206. Among these, the vibrometer 201, the communication I / F unit 202, the operation input unit 203, and the screen display unit 204 are the vibrometer 101 and the communication I / F unit of the vibration analysis apparatus 100 according to the first embodiment of the present invention. 102, the operation input unit 103, and the screen display unit 104.

  The storage unit 205 includes a storage device such as a hard disk or a memory, and has a function of storing processing information and programs 205P necessary for various processes in the arithmetic processing unit 206. The program 205P is a program that realizes various processing units by being read and executed by the arithmetic processing unit 206, and an external device (not shown) or the like via a data input / output function such as the communication I / F unit 202. It is read in advance from a storage medium (not shown) and stored in the storage unit 205. Main processing information stored in the storage unit 205 includes measurement point data 205A, vibration measurement data 205B, feature amount data 205C, partial region data 205D, and smooth feature amount data 205E. Among these, the measurement point data 205A, the vibration measurement data 205B, the feature amount data 205C, and the partial area data 205D are the measurement point data 105A and the vibration measurement data 105B of the vibration analyzer 100 according to the first embodiment of the present invention. It is the same as the feature amount data 105C and the partial area data 105D.

  The smooth feature quantity data 205E is data obtained by smoothing the feature quantity data of the vibration waveform in each partial area in the partial area data 205D for each partial area. FIG. 12 shows a configuration example of the smooth feature amount data 205E. In the smooth feature quantity data 205E, for each partial area, a partial area ID as identification information and a smoothed vibration waveform feature quantity are stored. The smoothed feature quantity of the vibration waveform describes a smoothed feature quantity FM for each type of feature quantity.

  The arithmetic processing unit 206 includes a microprocessor such as an MPU and its peripheral circuits, and reads and executes the program 205P from the storage unit 205, thereby realizing various processing units by cooperating the hardware and the program 205P. It has a function to do. As main processing units realized by the arithmetic processing unit 206, there are a vibration measurement unit 206A, a feature amount calculation unit 206B, an area division unit 206C, and a diagnosis unit 206D. Among these, the vibration measuring unit 206A, the feature amount calculating unit 206B, and the region dividing unit 206C are the vibration measuring unit 106A, the feature amount calculating unit 106B, and the region dividing unit of the vibration analyzing apparatus 100 according to the first embodiment of the present invention. It is the same as 106C.

  The diagnosis unit 206D has a function of diagnosing the structure 110 based on the partial region data 205D. The diagnosis unit 206D includes a smoothing unit 2061. The smoothing unit 2061 has a function of reading the feature amount data 205C and the partial region data 205D from the storage unit 205, calculating smooth feature amount data 205E based on these data, and storing the smoothed feature amount data 205E in the storage unit 205. Specifically, the smoothing unit 2061 extracts, for each partial region ID of the partial region data 205D, all measurement point IDs recorded in the partial region data 205D correspondingly, and extracts the extracted measurement points. The feature amount of the vibration waveform of ID is acquired from the feature amount data 205C, the average is calculated for each feature amount of the same type in the acquired feature amount data 205C, and the calculated average is smoothed. To do. For example, for the smoothed maximum amplitude, an average value of the maximum amplitudes of all measurement points belonging to the same partial region is calculated. The smoothed frequency spectrum calculates the average of the frequency spectra of all measurement points belonging to the same partial region.

  The diagnosis unit 206D has a function of diagnosing the structure 110 based on the measurement point data 205A, the partial region data 205D, and the smooth feature amount data 205E. For example, when there is a panel bolted to a part of the surface on the structure 110 on which a plurality of measurement points are set, the vibration characteristics of the panel and the vibration characteristics of the foundation part are different. Even when it is healthy, it is divided into a partial area corresponding to the panel and a partial area corresponding to the base portion. However, if the bolt is loose, the vibration characteristics will be different from those of a firmly fixed sound. Therefore, by comparing the feature value of the smoothed vibration waveform in the partial area corresponding to the panel with the feature value of the vibration waveform measured and acquired in the normal state, the deterioration of the mounting strength of the panel is determined. can do. This is an example, and diagnosis by other methods is possible.

  When the diagnosis unit 206 </ b> D calculates the diagnosis result of the structure 110, the diagnosis unit 206 </ b> D displays the diagnosis result on the screen display unit 204 or transmits the diagnosis result to an external device through the communication I / F unit 202.

  FIG. 13 is a flowchart showing the operation of the vibration analyzing apparatus 200 according to the present embodiment. Hereinafter, the operation of the vibration analysis apparatus 200 will be described with reference to FIG.

  First, the vibration analysis apparatus 200 performs measurement of the vibration waveform of the structure 110, calculation of the feature value of the vibration waveform, and region division by the vibration measurement unit 206A, the feature amount calculation unit 206B, and the region division unit 206C (step S201 to S203). These are the same as steps S101 to S103 in FIG. 7 showing the operation of the vibration analyzing apparatus 100 according to the first embodiment of the present invention.

  Next, the diagnosis unit 206D uses the smoothing unit 2061 to read the feature amount data 205C and the partial region data 205D from the storage unit 205, calculates the smoothed data 205E based on these data, and stores them in the storage unit 205. Save (step S204).

  Finally, the diagnosis unit 206D reads the measurement point data 205A, the partial region data 205D, and the smooth feature amount data 205E from the storage unit 205, diagnoses the structure 110 based on these data, and displays the diagnosis result on the screen display unit. 204 or transmitted from the communication I / F unit 202 to the outside (step S205).

  As described above, according to the present embodiment, the influence of noise on the measurement value of the vibrometer does not immediately affect the diagnosis result of the structure 110, and a robust diagnosis against noise becomes possible. The reason is that the region dividing unit 206C divides the region formed by the plurality of measurement points into partial regions that satisfy the uniformity of the feature amount based on the feature amount of the vibration waveform for each measurement point, and the diagnosis unit 206D. This is because the feature amount of the vibration waveform is smoothed for each partial region, and the structure 110 is diagnosed based on the result.

  In the first embodiment of the present invention, since the feature values of the vibration waveform for each partial region are only in units of measurement points, the feature values affected by noise and the feature values not received are mixed. ing. On the other hand, in this embodiment, since the influence of noise on the feature value of the vibration waveform is reduced by smoothing the feature value of the vibration waveform for each partial region, diagnosis based on the feature value of the vibration waveform is performed. Can be carried out stably.

[Third Embodiment]
Referring to FIG. 14, a vibration analysis apparatus 300 according to the third embodiment of the present invention includes a vibration meter 301, a communication I / F unit 302, an operation input unit 303, a screen display unit 304, a storage unit 305, and an arithmetic process. Part 306. Among these, the vibration meter 301, the communication I / F unit 302, the operation input unit 303, and the screen display unit 304 are the vibration meter 201 and the communication I / F unit of the vibration analysis apparatus 200 according to the second embodiment of the present invention. 202, the operation input unit 203, and the screen display unit 204 are the same.

  The storage unit 305 includes a storage device such as a hard disk or a memory, and has a function of storing processing information and programs 305P necessary for various processes in the arithmetic processing unit 306. The program 305P is a program that realizes various processing units by being read and executed by the arithmetic processing unit 306, and an external device (not shown) or the like via a data input / output function such as the communication I / F unit 302. It is read in advance from a storage medium (not shown) and stored in the storage unit 305. Main processing information stored in the storage unit 305 includes measurement point data 305A, vibration measurement data 305B, feature amount data 305C, partial region data 305D, smooth feature amount data 305E, and a reference frequency component 305F. Among these, the measurement point data 305A, the vibration measurement data 305B, the feature amount data 305C, the partial region data 305D, and the smooth feature amount data 305E are measured point data 205A of the vibration analysis apparatus 200 according to the second embodiment of the present invention. The vibration measurement data 205B, the feature data 205C, the partial region data 205D, and the smooth feature data 205E are the same.

  The reference frequency component 305 </ b> F is data indicating a frequency component of a specific vibration waveform measured from an abnormal part such as a floating, peeling, or hollow part in the structure 110.

  The arithmetic processing unit 306 has a microprocessor such as an MPU and its peripheral circuits, and reads and executes the program 305P from the storage unit 305, thereby realizing various processing units by cooperating the hardware and the program 305P. It has a function to do. As main processing units realized by the arithmetic processing unit 306, there are a vibration measurement unit 306A, a feature amount calculation unit 306B, an area division unit 306C, and a diagnosis unit 306D. Among these, the vibration measuring unit 306A, the feature amount calculating unit 306B, and the region dividing unit 306C are the vibration measuring unit 206A, the feature amount calculating unit 206B, and the region dividing unit of the vibration analyzing apparatus 200 according to the second embodiment of the present invention. It is the same as 206C.

  The diagnosis unit 306D has a function of diagnosing the structure 110 based on the partial region data 305D. The diagnosis unit 306D includes a smoothing unit 3061, an abnormal vibration partial region detection unit 3062, and an abnormal part output unit 3063. Among these, the smoothing unit 3061 is the same as the smoothing unit 2061 of the vibration analysis apparatus 200 according to the second embodiment of the present invention.

  The abnormal vibration partial region detection unit 3062 reads the smoothed feature amount data 305E and the reference frequency component 305F from the storage unit 305, and for each partial region of the smoothed feature amount data 305E, the smoothed vibration waveform of the partial region is obtained. It is determined whether or not the same frequency component as the reference frequency component 305F is included in the feature amount related to the frequency spectrum among the feature amounts, and if it is included, the partial region is detected as an abnormal part. It has a function.

  The abnormal part output unit 3063 has a function of displaying the abnormal part of the structure 110 detected by the abnormal vibration partial region detection unit 3062 on the screen display unit 304 and transmitting the same to the outside through the communication I / F unit 302. The area of the structure 110 corresponding to the partial area detected as an abnormal part can be identified from the position information of the measurement points belonging to the partial area (recorded in the measurement point data 305). In the display of the abnormal part screen display unit 304, the coordinate value of the abnormal part may be displayed as a numerical value or the like, or an image of the structure 110 in which the abnormal part is colored in a specific color or the like is displayed on the screen display unit 304. May be.

  FIG. 15 is a flowchart showing the operation of the vibration analysis apparatus 300 according to the present embodiment. Hereinafter, the operation of the vibration analysis apparatus 300 will be described with reference to FIG.

  First, the vibration analysis apparatus 300 uses the vibration measurement unit 306A, the feature amount calculation unit 306B, the region division unit 306C, and the smoothing unit 3061 of the diagnosis unit 306D to measure the vibration waveform of the structure 110 and to calculate the feature amount of the vibration waveform. Calculation, area division, and smoothing of the feature amount for each partial area are performed (steps S301 to S304). These are the same as steps S201 to S204 in FIG. 13 showing the operation of the vibration analyzing apparatus 200 according to the second embodiment of the present invention.

  Next, the abnormal vibration partial region detection unit 3062 of the diagnosis unit 306D includes, for each partial region of the smoothed feature amount data 305E, a reference amount in the feature amount related to the frequency spectrum of the smoothed feature amount of the partial region. The presence / absence of an abnormal region is determined by determining whether or not the same frequency component as the frequency component 305F is included in the threshold value or more (step S305). When the abnormal vibration partial region detection unit 3062 detects an abnormal part, the abnormal vibration partial region detection part 3062 transmits the fact to the abnormal part output unit 3063.

  The abnormal part output unit 3063 of the diagnosis unit 306D displays information on the abnormal part of the structure 110 detected by the abnormal vibration partial region detection unit 3062 on the screen display unit 304 or transmits the information from the communication I / F unit 302 to the outside. (Step S306).

  As described above, according to the present embodiment, the influence of noise on the measurement value of the vibrometer does not immediately affect the diagnosis result of the structure 110, and a robust diagnosis against noise becomes possible. The reason is that the region dividing unit 306C divides the region formed by the plurality of measurement points into partial regions that satisfy the uniformity of the feature amount based on the feature amount of the vibration waveform for each measurement point, and the diagnosis unit 306D. This is because the feature amount of the vibration waveform is smoothed for each partial region, and the structure 110 is diagnosed based on the result.

  In the first embodiment of the present invention, since the feature values of the vibration waveform for each partial region are only in units of measurement points, the feature values affected by noise and the feature values not received are mixed. ing. In contrast, in the present embodiment, by smoothing the feature value of the vibration waveform for each partial region, the influence of noise on the feature value of the vibration waveform is reduced, and the frequency component of the vibration waveform peculiar to abnormality is reduced. Depending on the presence or absence, it is possible to stably diagnose abnormalities such as peeling or cavities on the structure 110.

[Fourth Embodiment]
Referring to FIG. 16, a vibration analysis apparatus 400 according to the fourth embodiment of the present invention includes a vibration meter 401, a communication I / F unit 402, an operation input unit 403, a screen display unit 404, a storage unit 405, and an arithmetic process. Part 406. Among these, the vibration meter 401, the communication I / F unit 402, the operation input unit 403, and the screen display unit 404 are the vibration meter 201 and the communication I / F unit of the vibration analysis apparatus 200 according to the second embodiment of the present invention. 202, the operation input unit 203, and the screen display unit 204 are the same.

  The storage unit 405 includes a storage device such as a hard disk and a memory, and has a function of storing processing information and programs 405P necessary for various processes in the arithmetic processing unit 406. The program 405P is a program that implements various processing units by being read and executed by the arithmetic processing unit 406. It is read in advance from a storage medium (not shown) and stored in the storage unit 405. Main processing information stored in the storage unit 405 includes measurement point data 405A, vibration measurement data 405B, feature amount data 405C, partial region data 405D, smooth feature amount data 405E, and a threshold value 405F. Among these, the measurement point data 405A, the vibration measurement data 405B, the feature amount data 405C, the partial region data 405D, and the smooth feature amount data 405E are measured point data 205A of the vibration analyzing apparatus 200 according to the second embodiment of the present invention. The vibration measurement data 205B, the feature data 205C, the partial region data 205D, and the smooth feature data 205E are the same.

  The threshold value 405F indicates a reference correlation degree to be compared with the correlation degree of the smoothed feature amount between adjacent partial regions. Since the adjacent partial areas are divided as different partial areas, their smoothed feature amounts are different from each other. However, the difference in the characteristic amount of the vibration waveform may occur even if the structure 110 does not have a clear deterioration such as peeling or floating. Therefore, in the present embodiment, whether or not the difference should be determined to be abnormal is determined based on whether or not the absolute value of the difference in correlation between the smoothed feature amounts between the partial areas exceeds a certain threshold. The threshold value 405F is a threshold value for that purpose.

  The arithmetic processing unit 406 has a microprocessor such as an MPU and its peripheral circuits, and reads and executes the program 405P from the storage unit 405, thereby realizing various processing units by cooperating the hardware and the program 405P. It has a function to do. As main processing units realized by the arithmetic processing unit 406, there are a vibration measurement unit 406A, a feature amount calculation unit 406B, an area division unit 406C, and a diagnosis unit 406D. Among these, the vibration measuring unit 406A, the feature amount calculating unit 406B, and the region dividing unit 406C are the vibration measuring unit 206A, the feature amount calculating unit 206B, and the region dividing unit of the vibration analyzing apparatus 200 according to the second embodiment of the present invention. It is the same as 206C.

  The diagnosis unit 406D has a function of diagnosing the structure 110 based on the partial region data 405D. The diagnosis unit 406D includes a smoothing unit 4061, a correlation detection unit 4062 between adjacent partial regions, and an abnormal part output unit 4063. Among these, the smoothing unit 4061 is the same as the smoothing unit 2061 of the vibration analysis apparatus 200 according to the second embodiment of the present invention.

  The adjacent partial area correlation detection unit 4062 has a function of reading the measurement point data 405A and the partial area data 405D from the storage unit 405 and determining a pair of partial areas adjacent to each other. Further, the correlation detection unit 4062 between adjacent partial areas reads the smoothed feature value data 405E from the storage unit 405, and calculates the distance or similarity between the smoothed feature values of the partial areas for each of the determined partial area pairs. It has a function to calculate the degree of correlation. Further, the correlation detection unit 4062 between adjacent partial regions has a function of detecting an abnormal part of the structure 110 by reading the threshold value 405F from the storage unit 405 and comparing the calculated absolute value of the correlation with the threshold value 405F. Specifically, the correlation detection part 4062 between adjacent partial areas detects the boundary part of the pair of partial areas where the difference in the degree of correlation exceeds the threshold value 405F as an abnormal part.

  The abnormal part output unit 4063 has a function of displaying the abnormal part of the structure 110 detected by the correlation detecting unit 4062 between the adjacent partial areas on the screen display unit 404 and transmitting it to the outside through the communication I / F unit 402. The boundary between the partial areas detected as abnormal portions can be specified from the position information of the measurement points belonging to these partial areas (recorded in the measurement point data 305). In displaying the abnormal part on the screen display unit 404, the coordinate value of the abnormal part may be displayed as a numerical value, or an image of the structure 110 in which the abnormal part is colored in a specific color may be displayed on the screen display unit 404. Good.

  FIG. 17 is a flowchart showing the operation of the vibration analysis apparatus 400 according to the present embodiment. Hereinafter, the operation of the vibration analysis apparatus 400 will be described with reference to FIG.

  First, the vibration analysis apparatus 400 measures the vibration waveform of the structure 110 and calculates the characteristic amount of the vibration waveform by the vibration measurement unit 406A, the feature amount calculation unit 406B, the region division unit 406C, and the smoothing unit 4061 of the diagnosis unit 406D. Calculation, area division, and smoothing of the feature amount for each partial area are performed (steps S401 to S404). These are the same as steps S201 to S204 in FIG. 13 showing the operation of the vibration analyzing apparatus 200 according to the second embodiment of the present invention.

  Next, the correlation detection unit 4062 between the adjacent partial areas of the diagnosis unit 406D calculates, for each pair of adjacent partial areas in the smoothed feature quantity data 305E, the distance or similarity between the smoothed feature quantities of the partial areas. (Step S405). Next, the correlation detecting unit 4062 between the adjacent partial areas detects an abnormal portion of the structure 110 by comparing the calculated absolute value of the degree of correlation with the threshold value 405F (step S406). When the adjacent partial region correlation detection unit 4062 detects an abnormal part, it transmits the fact to the abnormal part output unit 4063.

  The abnormal part output unit 4063 of the diagnosis unit 406D displays information on the abnormal part of the structure 110 detected by the correlation detection unit 4062 between the adjacent partial areas on the screen display unit 404 or from the communication I / F unit 402 to the outside. Transmit (step S4076).

  As described above, according to the present embodiment, the influence of noise on the measurement value of the vibrometer does not immediately affect the diagnosis result of the structure 110, and a robust diagnosis against noise becomes possible. The reason is that the region dividing unit 406C divides the region formed by the plurality of measurement points into partial regions that satisfy the uniformity of the feature amount based on the feature value of the vibration waveform for each measurement point, and the diagnosis unit 406D. This is because the feature amount of the vibration waveform is smoothed for each partial region, and the structure 110 is diagnosed based on the result.

  In the first embodiment of the present invention, since the feature values of the vibration waveform for each partial region are only in units of measurement points, the feature values affected by noise and the feature values not received are mixed. ing. In contrast, in the present embodiment, the feature amount of the vibration waveform is smoothed for each partial region. For this reason, by comparing the absolute value of the difference in correlation between the smoothed feature amounts between the partial regions with a threshold value, it is possible to stably identify an abnormal portion such as a separation or a cavity on the structure 110. .

[Fifth Embodiment]
Referring to FIG. 18, the vibration analysis apparatus 500 according to the fifth embodiment of the present invention includes a vibration measurement unit 510, a feature amount calculation unit 520, a region division unit 530, and a diagnosis unit 540.

  The vibration measuring means 510 has a function of measuring vibration waveforms at a plurality of measurement points set on the structure. The feature amount calculation unit 520 has a function of calculating the feature amount of the vibration waveform for each measurement point. The area dividing unit 530 has a function of dividing an area formed by a plurality of measurement points into partial areas including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated. The diagnostic means 540 has a function of diagnosing the structure based on the result of the division. The diagnostic measurement unit 510, the feature amount calculation unit 520, the region division unit 530, and the diagnosis unit 540 can be realized by, for example, a computer and a program that operates on the computer.

  Next, the operation of the vibration analysis apparatus 500 according to the present embodiment will be described with reference to the flowchart of FIG.

  First, the vibration measuring means 510 measures vibration waveforms at a plurality of measurement points set on the structure (step S501). Next, the feature quantity calculation means 520 calculates the feature quantity of the vibration waveform for each measurement point (step S502). Next, the region dividing unit 530 divides a region formed by a plurality of measurement points into partial regions including measurement points at which feature amounts satisfying a predetermined condition among the feature amounts of the vibration waveform are calculated (step S503). ). Next, the diagnosis unit 540 diagnoses the structure based on the division result (step S504). Here, the diagnosis is to determine the appropriateness of the structure or the presence or absence of defects based on the result of the division. As long as the diagnosis is made, a diagnosis result is generated and saved or output. In other words, if information indicating the appropriateness of the structure or the presence or absence of defects is stored or output, it means that the structure has been diagnosed.

  According to the present embodiment, the accuracy of the diagnostic result of the structure is not lowered due to the influence of noise on the measurement value of the vibrometer, and a robust diagnosis against noise becomes possible.

  The reason is that the area dividing unit 530 divides an area formed by a plurality of measurement points into partial areas including the measurement points at which a feature quantity satisfying a predetermined condition among the feature quantities of the vibration waveform is calculated. This is because the means 540 diagnoses the structure based on the result of the division.

  While the present embodiment is based on the above configuration, various additions and changes as described below are possible.

  For example, the region dividing unit 530 may divide a region formed by a plurality of measurement points into partial regions including measurement points at which feature amounts that satisfy the uniformity of the feature amount of the vibration waveform are calculated.

  The diagnosis unit 540 may smooth the feature amount of the vibration waveform at the measurement point for each partial region, and diagnose the structure based on the smoothed feature amount of the vibration waveform.

  The diagnosis unit 540 may diagnose the structure based on the degree of correlation between the smoothed vibration waveform feature amounts between the partial areas adjacent to each other. At that time, the diagnosis unit 540 may diagnose whether there is an abnormality in the partial region by comparing the correlation degree with a predetermined threshold.

  Further, the feature quantity calculation means 520 calculates the frequency spectrum of the vibration waveform as the feature quantity of the vibration waveform, and the diagnosis means 540 determines the structure based on whether a specific frequency component is included in the frequency spectrum of the vibration waveform. You may diagnose things.

  Further, the region dividing unit 530 performs an image region dividing algorithm on the image having the measurement point as the respective coordinates on the image and the feature amount of the vibration waveform at the measurement point as the pixel feature amount at the respective coordinates on the image. May be used to divide a region formed by a plurality of measurement points into partial regions including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated.

  The vibration measuring unit 510 may measure vibration waveforms at a plurality of measurement points within a predetermined period.

[Sixth Embodiment]
Referring to FIG. 20, the vibration analysis apparatus 600 according to the sixth embodiment of the present invention includes a vibration measurement unit 610, a feature amount calculation unit 620, a region division unit 630, and a diagnosis unit 640. Among them, the vibration measuring unit 610, the feature amount calculating unit 620, and the region dividing unit 630 are the vibration measuring unit 610 and the feature amount calculating unit 620 of the vibration analyzing apparatus 500 according to the fifth embodiment of the present invention shown in FIG. And has the same function as the area dividing means 630.

  The diagnosis unit 640 has a function of diagnosing a structure based on the division result of the region dividing unit 630. Diagnosis means 640 includes determination means 641 and area output means 642. The determination unit 641 has a function of determining whether or not the partial area has a defect. The area output unit 642 has a function of outputting the partial area determined to have a defect by the determination unit 641. The diagnostic measurement unit 610, the feature amount calculation unit 620, the region division unit 630, and the diagnosis unit 640 can be realized by, for example, a computer and a program that operates on the computer.

  Next, the operation of the vibration analysis apparatus 600 according to the present embodiment will be described with reference to the flowchart of FIG.

  First, the vibration measuring means 610 measures vibration waveforms at a plurality of measurement points set on the structure (step S601). Next, the feature amount calculation unit 620 calculates the feature amount of the vibration waveform for each measurement point (step S602). Next, the area dividing unit 630 divides an area formed by a plurality of measurement points into partial areas including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated (step S603). ). Next, the determination unit 641 of the diagnosis unit 640 determines whether or not the partial area has a defect (step S604). Next, the region output unit 642 of the diagnosis unit 640 outputs the partial region determined to have a defect (step S605).

  According to the present embodiment, the accuracy of the diagnostic result of the structure is not lowered due to the influence of noise on the measurement value of the vibrometer, and a robust diagnosis against noise becomes possible.

  The reason is that the area dividing unit 630 divides an area formed by a plurality of measurement points into partial areas including measurement points at which a feature quantity satisfying a predetermined condition among the feature quantities of the vibration waveform is calculated, and diagnosis is performed. This is because the means 640 diagnoses the structure based on the result of the division.

  Further, according to the present embodiment, it is possible to detect which part of the structure has a defect.

  The reason is that the determination unit 641 of the diagnosis unit 640 determines whether or not the partial region is defective, and the region output unit 642 of the diagnosis unit 640 outputs the partial region determined to have a defect. .

  While the present embodiment is based on the above configuration, various additions and changes as described below are possible.

  For example, the region dividing unit 530 may divide a region formed by a plurality of measurement points into partial regions including measurement points at which feature amounts that satisfy the uniformity of the feature amount of the vibration waveform are calculated.

  The diagnosis unit 540 may smooth the feature amount of the vibration waveform at the measurement point for each partial region, and diagnose the structure based on the smoothed feature amount of the vibration waveform.

  The diagnosis unit 540 may diagnose the structure based on the degree of correlation between the smoothed vibration waveform feature amounts between the partial areas adjacent to each other. At that time, the diagnosis unit 540 may diagnose whether there is an abnormality in the partial region by comparing the correlation degree with a predetermined threshold.

  Further, the feature quantity calculation means 520 calculates the frequency spectrum of the vibration waveform as the feature quantity of the vibration waveform, and the diagnosis means 540 determines the structure based on whether a specific frequency component is included in the frequency spectrum of the vibration waveform. You may diagnose things.

  Further, the region dividing unit 530 performs an image region dividing algorithm on the image having the measurement point as the respective coordinates on the image and the feature amount of the vibration waveform at the measurement point as the pixel feature amount at the respective coordinates on the image. May be used to divide a region formed by a plurality of measurement points into partial regions including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated.

  The vibration measuring unit 510 may measure vibration waveforms at a plurality of measurement points within a predetermined period.

  Although the present invention has been described with reference to some embodiments, the present invention is not limited to the above embodiments, and various other additions and modifications can be made.

  The present invention can be applied to the field of diagnosing structures by measuring vibrations of civil engineering buildings such as bridges and various industrial products and facilities.

A part or all of the above embodiments can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1)
Vibration measuring means for measuring vibration waveforms at a plurality of measurement points set on the structure;
Feature quantity calculating means for calculating the feature quantity of the vibration waveform for each measurement point;
Area dividing means for dividing an area formed by the plurality of measurement points into partial areas including measurement points at which a feature amount satisfying a predetermined condition among the feature amounts of the vibration waveform is calculated;
A vibration analysis apparatus having diagnostic means for diagnosing the structure based on a result of the division.
(Appendix 2)
The diagnostic means includes
Determining means for determining whether or not the partial area has a defect;
Region output means for outputting the partial region determined to have the defect;
The vibration analysis apparatus according to appendix 1, including:
(Appendix 3)
The region dividing means divides a region formed by the plurality of measurement points into the partial regions including measurement points at which feature amounts that satisfy the uniformity of the feature amount of the vibration waveform are calculated. Or the vibration analysis apparatus of 2.
(Appendix 4)
Any one of Supplementary notes 1 to 3, wherein the diagnosis unit smoothes the feature value of the vibration waveform at the measurement point for each partial region, and diagnoses the structure based on the smoothed feature value of the vibration waveform. The vibration analysis apparatus according to item 1.
(Appendix 5)
The vibration analysis apparatus according to appendix 4, wherein the diagnosis unit diagnoses the structure based on a degree of correlation between feature values of the smoothed vibration waveform between the partial regions adjacent to each other.
(Appendix 6)
The vibration analysis apparatus according to appendix 5, wherein the diagnosis unit diagnoses whether or not there is an abnormality in the partial region by comparing the degree of correlation with a predetermined threshold value.
(Appendix 7)
The feature amount calculating means calculates a frequency spectrum of the measured vibration waveform as a feature amount of the vibration waveform,
The vibration analysis apparatus according to any one of appendices 1 to 6, wherein the diagnosis unit diagnoses the structure based on whether a specific frequency component is included in a frequency spectrum of the vibration waveform.
(Appendix 8)
The region dividing unit is configured to perform image region comparison with respect to the image in which the measurement points are the respective coordinates on the image, and the feature values of the vibration waveform at the measurement points are the pixel feature values at the respective coordinates on the image. Supplementary note 1 that divides a region formed by the plurality of measurement points into partial regions including measurement points that satisfy a predetermined condition among the feature values of the vibration waveform by using a division algorithm 8. The vibration analyzing apparatus according to any one of 7 to 7.
(Appendix 9)
9. The vibration analyzing apparatus according to any one of appendices 1 to 8, wherein the vibration measuring unit measures vibration waveforms at the plurality of measurement points within a predetermined period.
(Appendix 10)
A vibration analysis method executed by a vibration analyzer,
Measure vibration waveforms at multiple measurement points set on the structure,
Calculating a feature value of the vibration waveform for each measurement point;
The region formed by the plurality of measurement points is divided into partial regions including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated,
A vibration analysis method for diagnosing the structure based on the result of the division.
(Appendix 11)
In the diagnosis,
Determine whether the partial area is defective,
The vibration analysis method according to appendix 10, wherein the partial area determined to have the defect is output.
(Appendix 12)
In the division, the region formed by the plurality of measurement points is divided into the partial regions including the measurement points at which the feature amount that satisfies the uniformity of the feature amount of the vibration waveform is calculated. The vibration analysis method described in 1.
(Appendix 13)
Any one of appendices 10 to 12, wherein in the diagnosis, the feature amount of the vibration waveform at the measurement point is smoothed for each partial region, and the structure is diagnosed based on the smoothed feature amount of the vibration waveform. The vibration analysis method according to item.
(Appendix 14)
14. The vibration analysis method according to appendix 13, wherein in the diagnosis, the structure is diagnosed on the basis of the degree of correlation between the smoothed vibration waveform features between the partial regions adjacent to each other.
(Appendix 15)
15. The vibration analysis method according to appendix 14, wherein in the diagnosis, a diagnosis is made as to whether or not there is an abnormality in the partial region by comparing the correlation degree with a predetermined threshold value.
(Appendix 16)
In the calculation of the feature amount, a frequency spectrum of the measured vibration waveform is calculated as a feature amount of the vibration waveform,
16. The vibration analysis method according to any one of appendices 10 to 15, wherein in the diagnosis, the structure is diagnosed based on whether a specific frequency component is included in a frequency spectrum of the vibration waveform.
(Appendix 17)
In the division, an image area division algorithm is used for the image in which the measurement points are the respective coordinates on the image, and the feature values of the vibration waveform at the measurement points are the feature values of the pixels at the respective coordinates on the image. To divide the region formed by the plurality of measurement points into partial regions including the measurement points where the feature values satisfying a predetermined condition among the feature values of the vibration waveform are calculated. The vibration analysis method according to any one of the above.
(Appendix 18)
18. The vibration analysis method according to any one of appendices 10 to 17, wherein in the measurement, vibration waveforms at the plurality of measurement points are measured within a predetermined period.
(Appendix 19)
Computer
Vibration measuring means for measuring vibration waveforms at a plurality of measurement points set on the structure;
Feature quantity calculating means for calculating the feature quantity of the vibration waveform for each measurement point;
Area dividing means for dividing an area formed by the plurality of measurement points into partial areas including measurement points at which a feature amount satisfying a predetermined condition among the feature amounts of the vibration waveform is calculated;
A program that functions as a diagnostic means for diagnosing the structure based on the result of the division.
(Appendix 20)
The diagnostic means includes
Determining means for determining whether or not the partial area has a defect;
Region output means for outputting the partial region determined to have the defect;
The program according to appendix 19, including:
(Appendix 21)
The region dividing means divides a region formed by the plurality of measurement points into the partial regions including measurement points at which feature amounts that satisfy the uniformity of the feature amount of the vibration waveform are calculated. The program described in.
(Appendix 22)
Any one of appendices 19 to 21, wherein the diagnosis unit smoothes the feature value of the vibration waveform at the measurement point for each partial region, and diagnoses the structure based on the smoothed feature value of the vibration waveform. The program according to item 1.

DESCRIPTION OF SYMBOLS 100 ... Vibration analyzer 101 ... Vibrometer 102 ... Communication I / F part 103 ... Operation input part 104 ... Screen display part 105 ... Memory | storage part 105A ... Measurement point data 105B ... Vibration measurement data 105C ... Feature-value data 105D ... Partial area data 105P ... Program 106A ... Vibration measuring unit 106B ... Feature amount calculating unit 106C ... Area dividing unit 106D ... Diagnostic unit 110 ... Structure 111 ... Measurement point

Claims (11)

Vibration measuring means for measuring vibration waveforms at a plurality of measurement points set on the structure;
Feature quantity calculating means for calculating the feature quantity of the vibration waveform for each measurement point;
Area dividing means for dividing an area formed by the plurality of measurement points into partial areas including measurement points at which a feature amount satisfying a predetermined condition among the feature amounts of the vibration waveform is calculated;
A vibration analysis apparatus having diagnostic means for diagnosing the structure based on a result of the division. The diagnostic means includes
Determining means for determining whether or not the partial area has a defect;
Region output means for outputting the partial region determined to have the defect;
The vibration analysis device according to claim 1, comprising: The area dividing means divides an area formed by the plurality of measurement points into the partial areas including measurement points at which feature quantities that satisfy the uniformity of the feature quantities of the vibration waveform are calculated. The vibration analysis apparatus according to 1 or 2. 4. The diagnosis unit according to claim 1, wherein the diagnosis unit smoothes the feature value of the vibration waveform at the measurement point for each of the partial regions, and diagnoses the structure based on the smoothed feature value of the vibration waveform. The vibration analysis apparatus according to claim 1. The vibration analysis apparatus according to claim 4, wherein the diagnosis unit diagnoses the structure based on a degree of correlation between the smoothed vibration waveform features between the partial regions adjacent to each other. The vibration analysis apparatus according to claim 5, wherein the diagnosis unit diagnoses whether there is an abnormality in the partial region by comparing the degree of correlation with a predetermined threshold value. The feature amount calculating means calculates a frequency spectrum of the measured vibration waveform as a feature amount of the vibration waveform,
The vibration analysis apparatus according to claim 1, wherein the diagnosis unit diagnoses the structure based on whether a specific frequency component is included in a frequency spectrum of the vibration waveform. The region dividing unit is configured to perform image region comparison with respect to the image in which the measurement point is the respective coordinate on the image, and the feature amount of the vibration waveform at the measurement point is the feature amount of the pixel at each coordinate on the image. A region formed by the plurality of measurement points is divided into partial regions including measurement points at which feature amounts satisfying a predetermined condition among the feature amounts of the vibration waveform are calculated by using a division algorithm. The vibration analysis apparatus according to any one of 1 to 7. The vibration analysis apparatus according to claim 1, wherein the vibration measurement unit measures vibration waveforms at the plurality of measurement points within a predetermined period. A vibration analysis method executed by a vibration analyzer,
Measure vibration waveforms at multiple measurement points set on the structure,
Calculating a feature value of the vibration waveform for each measurement point;
The region formed by the plurality of measurement points is divided into partial regions including measurement points at which feature quantities satisfying a predetermined condition among the feature quantities of the vibration waveform are calculated,
A vibration analysis method for diagnosing the structure based on the result of the division. Computer
Vibration measuring means for measuring vibration waveforms at a plurality of measurement points set on the structure;
Feature quantity calculating means for calculating the feature quantity of the vibration waveform for each measurement point;
Area dividing means for dividing an area formed by the plurality of measurement points into partial areas including measurement points at which a feature amount satisfying a predetermined condition among the feature amounts of the vibration waveform is calculated;
A program that functions as a diagnostic means for diagnosing the structure based on the result of the division.

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