JPWO2015145972A1 - Defect analysis apparatus, defect analysis method, and defect analysis program - Google Patents

Abstract

The vibration detection units 110A and 110B detect the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. The frequency determination unit 121 determines a first frequency band f1 caused by fluid leakage from the piping and a second frequency band f2 different from the first frequency band f1. Based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W detected by the vibration detection unit, the disturbance vibration determination unit 122 detects a disturbance vibration WG that is a vibration other than the leakage vibration WO. It is determined whether or not the vibration wave W detected by the unit is superimposed on the first frequency band f1. Here, the leakage vibration WO is vibration due to leakage of the fluid 910 from the pipe 900. Thereby, it can be easily determined that disturbance vibration, which is vibration other than leakage vibration, is superimposed on leakage vibration caused by leakage of fluid from the pipe.

Description

  The present invention relates to a defect analyzer and the like, for example, to a device that detects whether or not a fluid is leaking from a pipe.

  In recent years, a large number of pipes are arranged underground. When the piping deteriorates with age, the fluid flowing in the piping may leak out of the piping.

  As a method for inspecting leakage of fluid from a pipe, for example, leakage inspection by a correlation method is known. In this inspection method, first, a pair of vibration sensors are arranged on the pipe at a predetermined distance so as to sandwich the defective portion on both sides. Vibration sound (leakage vibration) caused by leakage propagates through the pipe. The time for the vibration sound generated by this leakage to reach each of the pair of vibration sensors is measured. Then, the fluid leakage position is estimated from the product of the difference between the two measured values of the vibration arrival time (vibration arrival time difference) and the sound velocity. At this time, in calculating the arrival time difference of vibration, the cross-correlation function of the time series data is calculated, and the time corresponding to the maximum value of the function is used.

  As a related invention, for example, in Patent Document 1, a frequency band of a power spectrum of leakage vibration that fluctuates when a fluid pressure is changed is detected, and a signal detected in the frequency band is subjected to correlation processing. A technique for specifying a leakage position is disclosed.

JP 2005-265663 A

  Here, in the background art described above, the pair of vibration sensors may detect vibrations including not only leakage vibrations but also disturbance vibrations other than leakage vibrations. In this case, since the pair of vibration sensors cannot accurately detect the leakage vibration, the arrival time difference of the vibration is not accurately calculated. As a result, the fluid leakage position cannot be accurately identified. Therefore, in order to specify the fluid leakage position more accurately, there is a problem that it is necessary to determine that the disturbance vibration is superimposed on the leakage vibration.

  As the disturbance, there are known an unsteady disturbance that is a disturbance that is suddenly mixed and a steady disturbance that is a disturbance that always exists. Among unsteady disturbances and steady disturbances, it is particularly difficult to determine that the steady disturbance is mixed in the leakage vibration.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to easily cause disturbance vibration, which is vibration other than leakage vibration, to be superimposed on leakage vibration caused by leakage of fluid from a pipe. It is an object of the present invention to provide a defect analysis apparatus that can make a determination.

  The defect analysis apparatus of the present invention is a vibration detecting means for detecting a vibration wave propagating through a pipe or a fluid flowing in the pipe, a first frequency band that is a frequency band caused by leakage of the fluid from the pipe, Based on the vibration acceleration of the second frequency band of the vibration wave detected by the vibration detection means, the frequency determination means for determining a second frequency band different from the first frequency band, from the pipe Disturbance vibration determination means for determining whether or not disturbance vibration, which is vibration other than vibration due to fluid leakage, is superimposed on the first frequency band of the vibration wave detected by the vibration detection means. And.

  The control device of the present invention outputs a vibration detection instruction signal for detecting a vibration wave propagating through a pipe or a fluid flowing in the pipe, and a first frequency which is a frequency band caused by the leakage of the fluid from the pipe A frequency determination instruction signal for determining a band and a second frequency band different from the first frequency band, and generating a vibration acceleration in the second frequency band of the vibration wave detected according to the vibration detection instruction signal On the basis, whether disturbance vibration, which is vibration other than vibration caused by leakage of the fluid from the pipe, is superimposed in the first frequency band of the vibration wave detected according to the vibration detection instruction signal. Disturbance vibration determination instruction signal for determining whether or not.

  The processing apparatus of the present invention includes a first frequency band that is a frequency band caused by fluid leakage from a pipe, a frequency determining unit that determines a second frequency band different from the first frequency band, and the pipe. Or, based on the vibration acceleration in the second frequency band of the vibration wave propagating through the fluid flowing in the pipe, disturbance vibration which is vibration other than vibration caused by leakage of the fluid from the pipe is detected by the vibration detection. Disturbance vibration determining means for determining whether or not the vibration wave detected by the means is superimposed in the first frequency band.

  In the defect analysis method of the present invention, a vibration wave propagating through a pipe or a fluid flowing in the pipe is detected, and a first frequency band that is a frequency band caused by leakage of the fluid from the pipe, and the first A disturbance frequency that is a vibration other than the vibration caused by the leakage of the fluid from the pipe is determined based on the vibration acceleration of the second frequency band of the vibration wave. Determines whether or not the vibration wave is superimposed on the first frequency band.

  The storage medium of the present invention detects a vibration wave propagating through a pipe or a fluid flowing in the pipe, and includes a first frequency band that is a frequency band caused by leakage of the fluid from the pipe, and the first frequency band A second frequency band different from the frequency band is determined, and disturbance vibration that is vibration other than vibration caused by leakage of the fluid from the pipe is determined based on vibration acceleration of the second frequency band of the vibration wave. A program for causing a computer to perform a process of determining whether or not the vibration wave is superimposed on the first frequency band is stored.

  According to the defect analysis apparatus and the like according to the present invention, it is possible to easily determine that disturbance vibration, which is vibration other than leakage vibration, is superimposed on leakage vibration caused by fluid leakage from the pipe.

It is a conceptual diagram of the defect analyzer in the 1st Embodiment of this invention. It is a figure which shows the operation | movement flow of the defect analyzer in the 1st Embodiment of this invention. It is a conceptual diagram for demonstrating operation | movement of a disturbance vibration determination part. It is a figure which shows the signal output relationship of the control apparatus in the 1st Embodiment of this invention. It is a conceptual diagram of the defect analyzer in the 2nd Embodiment of this invention. It is a figure which shows the operation | movement flow of the defect analyzer in the 2nd Embodiment of this invention. It is a conceptual diagram for demonstrating operation | movement of a disturbance vibration determination part and a disturbance vibration reduction part. It is a figure which shows the signal output relationship of the control apparatus in the 2nd Embodiment of this invention. It is a conceptual diagram of the defect analyzer in the 3rd Embodiment of this invention. It is a figure which shows the operation | movement flow of the defect analyzer in the 3rd Embodiment of this invention. It is a figure which shows an example of the relationship between the frequency of fluid vibration at the time of giving different temperature changes to a fluid, and vibration acceleration. It is a figure which shows the signal output relationship of the control apparatus in the 3rd Embodiment of this invention. It is a conceptual diagram of the defect analyzer in the 4th Embodiment of this invention. It is a figure which shows the operation | movement flow of the defect analyzer in the 4th Embodiment of this invention. It is a figure which shows an example of the relationship between the frequency of a fluid vibration at the time of giving a different pressure change to a fluid, and vibration acceleration. It is a figure which shows the signal output relationship of the control apparatus in the 4th Embodiment of this invention. It is a figure which shows an example of the relationship of the frequency of a fluid vibration at the time of applying different pressure to a fluid, and vibration acceleration.

<First Embodiment>
A configuration of the defect analysis apparatus 100 according to the first embodiment of the present invention will be described.

  FIG. 1 is a conceptual diagram of a defect analysis apparatus 100 according to the first embodiment of the present invention.

  As shown in FIG. 1, the pipe 900 is embedded in the underground 600. On the other hand, the pipe 900 may be installed in an attic or a basement of a building, and may be embedded in a wall, a pillar, or the like of the building. Further, the fluid 910 (liquid or gas) flows in the pipe 900. The leak hole 920 is a hole formed in the pipe 900 due to aging or external damage. The fluid 910 flowing through the pipe 900 leaks from the leak hole 920.

  As shown in FIG. 1, the defect analysis apparatus 100 includes a first vibration detection unit 110 </ b> A, a second vibration detection unit 110 </ b> B, and a processing unit 120. The processing unit 120 corresponds to the processing apparatus of the present invention.

  The first and second vibration detection units 110 </ b> A and 110 </ b> B and the processing unit 120 are connected for communication by wire or wireless.

  As shown in FIG. 1, the first vibration detection unit 110 </ b> A and the second vibration detection unit 110 </ b> B transmit the vibration wave W propagating through the pipe 900 or the fluid 910 (liquid or gas) in the pipe 900 to the pipe 900. To detect through. For the first vibration detection unit 110A and the second vibration detection unit 110B, a piezoelectric acceleration sensor, an electrodynamic acceleration sensor, a capacitive acceleration sensor, an optical speed sensor, a dynamic strain sensor, or the like can be used. . In addition, although it demonstrated that two vibration detection parts (1st vibration detection part 110A, 2nd vibration detection part 110B) were provided here, you may provide one vibration detection part.

  In the example of FIG. 1, the first vibration detection unit 110 </ b> A and the second detection unit 110 </ b> B are attached to the outer wall surface of the pipe 900 via the water spigots 700 </ b> A and 700 </ b> B. The water spigots 700A and 700B may be stop cocks or the like. The first vibration detection unit 110A and the second vibration detection unit 110B may be permanently installed at the installation location to detect the vibration constantly, or may be installed for a predetermined period to detect the vibration intermittently.

  On the other hand, the first vibration detection unit 110 </ b> A and the second vibration detection unit 110 </ b> B may be attached to the inner wall surface of the pipe 900. Further, the first vibration detection unit 110A and the second vibration detection unit 110B are installed on the outer surface or inside of a flange (not shown) installed in the pipe 900 or an accessory (not shown) such as a valve plug. May be. As a method of installing the first vibration detection unit 110A and the second vibration detection unit 110B in the pipe 900 or the accessory of the pipe 900, for example, use of a magnet, use of a dedicated jig, use of an adhesive may be considered.

  As shown in FIG. 1, the processing unit 120 is connected to the first vibration detection unit 110A and the second vibration detection unit 110B by wire or wirelessly. The processing unit 120 receives data of the vibration wave W detected by the first or second vibration detection unit 110A or 110B. As illustrated in FIG. 1, the processing unit 120 includes a frequency determination unit 121 and a disturbance vibration determination unit 122.

  The frequency determination unit 121 determines a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1.

  The disturbance vibration determination unit 122 determines whether or not the disturbance vibration WG is superimposed in the first frequency band f1 of the vibration wave W based on the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2. Determine whether. The vibration wave W is a vibration wave detected by the first or second vibration detection unit 110A or 110B. The disturbance vibration WG is vibration other than vibration (leakage vibration WO) caused by leakage of the fluid 910 from the pipe 900.

  Next, the operation of the defect analysis apparatus 100 according to the first embodiment of the present invention will be described.

  FIG. 2 is a diagram showing an operation flow of the defect analysis apparatus 100 according to the first embodiment of the present invention.

  As shown in FIG. 2, first and second vibration detection units 110A and 110B detect first or second vibration waves W1 and W2 (step (STEP: hereinafter referred to as S) 1). ). More specifically, the first or second vibration detection unit 110A, 110B detects the vibration propagating through the pipe 900 or the fluid 910 flowing through the pipe 900 as the first or second vibration wave W1, W2. . Then, the first or second vibration detection unit 110A or 110B transmits one of the first or second vibration waves W1 and W2 to the processing unit 120 as the vibration wave W. Next, the processing unit 120 receives the vibration wave W.

  Next, the frequency determination unit 121 determines a first frequency band f1 that is a frequency band resulting from leakage of the fluid 910 from the pipe 900 (S2).

  Next, the disturbance vibration determination unit 122 determines whether or not the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is greater than or equal to the threshold WL-0 (f1) (S3).

  Here, FIG. 3 is a conceptual diagram for explaining the operation of the disturbance vibration determination unit 122. 3A to 3C, the vibration acceleration is set on the vertical axis and the frequency is set on the horizontal axis.

  FIG. 3A is a diagram illustrating an example of the vibration wave W detected by the first or second vibration detection unit 110A or 110B, particularly including the vicinity of the first frequency band f1. FIGS. 3B and 3C are examples of the vibration wave W detected by the first or second vibration detection unit 110A or 110B, and in particular, the first frequency band f1 and the second frequency band f2. It is a figure which shows what includes the vicinity. FIG. 3B shows an example in which the disturbance vibration WG is included in the second frequency band f2, and FIG. 3C shows the disturbance vibration WG in the second frequency band f2. An example that does not.

  In FIG. 3B, of the vibration wave W, the wave in the second frequency band f2 portion (wave corresponding to the second frequency band f2) and the wave in the first frequency band f1 portion (first frequency) Waves corresponding to the band f1) are correlated with each other. Here, except for special cases, the general vibration is a plurality of frequency peaks (the frequency peak is a graph when the vibration wave W is represented in a graph with the horizontal axis representing frequency and the vertical axis representing vibration acceleration. It means a point that becomes a mountain shape.) It is assumed that one of the plurality of frequency peaks overlaps the first frequency band (leakage vibration band) and the other is in the second frequency band (other than the first frequency band). As described above, the first frequency band f1 is a frequency band caused by the leakage of the fluid 910 from the pipe 900. Here, the first frequency band f1 is also referred to as a leakage vibration band.

  The first frequency band f1 is set in advance. As a method of determining the first frequency band f1, for example, a method of determining by statistical processing from vibration data for a predetermined period of the first vibration detection unit 110A, a method of reading from a database, and an impulse response method are used. Can be used. Here, in the impulse response method, an arbitrary portion of the pipe 900 is vibrated with a hammer or the like, and vibration characteristics are included with a vibration sensor (not shown, including the first vibration detection unit 110A and the second vibration detection unit 110B). This is a method of examining the first frequency band f1 by detecting.

  As shown in FIG. 3A, the disturbance vibration determination unit 122 compares the vibration acceleration WL (f1) of the vibration wave W1 in the first frequency band f1 with the threshold WL-0 (f1). Then, as shown in FIG. 2, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1). (S3, YES), the frequency determination unit 121 determines a second frequency band f2 different from the first frequency band f1 (S4).

  As a method for determining the second frequency band f2, for example, it may be referred from a predetermined database in consideration of the environment in which the defect analysis apparatus 100 is installed. It is assumed that an appropriate second frequency band f2 is stored in the predetermined database according to the environment in which the defect analysis apparatus 100 is installed. That is, for example, when the defect analysis apparatus 100 is installed in an urban area, it may be considered that a running sound of an automobile is generated. At this time, the predetermined frequency database stores a second frequency band f2 in consideration of the frequency band of the traveling sound of the automobile.

  On the other hand, if the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is not greater than or equal to the threshold WL-0 (f1) (S3, NO), the disturbance vibration determination The part 122 determines that there is no leakage in the pipe 900 (S5). Then, the process returns to S1.

  When the second frequency band f2 is determined by the frequency determination unit 121 (S4), the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2 is a predetermined threshold WL. It is determined whether or not −0 (f2) or more (S6).

  Then, as shown in FIG. 3B, when the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122 (S6, YES in FIG. 2), the disturbance vibration determination unit 122 superimposes the disturbance vibration WG, which is a vibration other than the leakage vibration WO, in the first frequency band f1 of the vibration wave W. (S7).

  On the other hand, as shown in FIG. 3C, if the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is not equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122 When the determination is made (NO in S6 in FIG. 2), the disturbance vibration determination unit 122 determines that the disturbance vibration WG that is a vibration other than the leakage vibration WO is not superimposed on the first frequency band f1 of the vibration wave W. It is determined that there is a leak in the pipe 900 (S8).

  In this way, the disturbance vibration determination unit 122 determines that the disturbance vibration WG, which is vibration other than the leakage vibration WO, is based on the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2. It is determined whether or not the frequency band f1 is superimposed (S6 to S8).

  The operation of the defect analysis apparatus 100 according to the first embodiment of the present invention has been described above.

  A control device 500 that inputs and outputs signals between the first or second vibration detection units 110A and 110B, the frequency determination unit 121, and the disturbance vibration determination unit 122 may be newly provided.

  FIG. 4 is a diagram illustrating a signal output relationship of the control device 500. As shown in FIG. 4, the control device 500 outputs a vibration detection instruction signal to the first or second vibration detection unit 110 </ b> A, 110 </ b> B. The vibration detection instruction signal is a signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing in the pipe 900.

  Control device 500 outputs a frequency determination instruction signal to frequency determination unit 121. The frequency determination instruction signal is a signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1.

  Control device 500 outputs a disturbance vibration determination instruction signal to disturbance vibration determination unit 122 based on vibration acceleration WL (f2) of second frequency band f2 of vibration wave W detected according to the vibration detection instruction signal. The disturbance vibration determination instruction signal is a first frequency band of the vibration wave W that is detected by the disturbance vibration WG that is vibration other than vibration (leakage vibration WO) caused by leakage of the fluid 910 from the pipe 900 according to the vibration detection instruction signal. It is a signal for determining whether or not it is superimposed in f1.

  Thereby, the instruction processing for operating the main functions of the defect analysis apparatus 100 described above can be integrated into the control apparatus 500.

  As described above, the defect analysis apparatus 100 according to the first embodiment of the present invention includes the vibration detection unit (vibration detection unit, first or second vibration detection unit 110A, 110B), and the frequency determination unit 121 (frequency. Determination means) and disturbance vibration determination unit 122 (disturbance vibration determination means). The vibration detection unit detects the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. The frequency determination unit 121 determines a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1. Based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W detected by the vibration detection unit, the disturbance vibration determination unit 122 detects a disturbance vibration WG that is a vibration other than the leakage vibration WO. It is determined whether or not the vibration wave W detected by the unit is superimposed on the first frequency band f1. Here, the leakage vibration WO is vibration due to leakage of the fluid 910 from the pipe 900.

  As described above, the frequency determination unit 121 determines the first frequency band f1 that is a frequency band caused by the leakage of the fluid 910 from the pipe 900 and the second frequency band f2 that is different from the first frequency band f1. . Then, the disturbance vibration determination unit 122 generates a disturbance vibration WG that is a vibration other than the leakage vibration WO based on the vibration acceleration WL (f2) in the second frequency band f2 of the vibration wave W detected by the vibration detection unit. It is determined whether or not the vibration wave W detected by the vibration detection unit is superimposed on the first frequency band f1.

  That is, the disturbance vibration determination unit 122 vibrates the vibration wave W in the second frequency band f2, which is a different frequency band from the first frequency band f1 (frequency due to leakage of the fluid 910 from the pipe 900). The acceleration WL (f2) is detected. Then, the disturbance vibration determination unit 123 determines whether the vibration wave W is superimposed on the first frequency band f1 based on the vibration acceleration WL (f2) of the vibration wave W.

  Thus, according to the defect analysis apparatus 100, whether or not the leakage vibration WO and the disturbance vibration WG are superimposed in the first frequency band f1 is determined in the second frequency band f2 different from the first frequency band f1. It can be indirectly determined from the vibration acceleration WL (f2) of the vibration wave W.

  Therefore, even if it is difficult to determine whether the leakage vibration WO and the disturbance vibration WG are superimposed only by analyzing the first frequency band f1, the vibration acceleration WL of the vibration wave W in the second frequency band f2 is difficult. By indirectly using (f2), it is possible to easily determine whether or not the leakage vibration WO and the disturbance vibration WG are superimposed in the first frequency band f1.

  In particular, when a steady disturbance, which is a disturbance that always exists, is mixed in the leakage vibration WO as the disturbance vibration WG, the vibration wave W that appears in the first frequency band f1 (frequency due to leakage of the fluid 910 from the pipe 900). It is difficult to determine whether the leakage vibration WO and the disturbance vibration WG are superimposed only by analysis. Even in such a case, the leakage vibration WO and the disturbance vibration WG are in the first frequency band f1 by indirectly using the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2. It can be easily determined whether or not they are superimposed.

  Therefore, according to the defect analysis apparatus 100, it is possible to easily determine that a disturbance vibration other than the leakage vibration WO is superimposed on the leakage vibration WO caused by the leakage of the fluid 910 from the pipe 900.

  In addition, the control device 500 according to the first embodiment of the present invention outputs a vibration detection instruction signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. The control device 500 outputs a frequency determination instruction signal. The frequency determination instruction signal is a signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1. Control device 500 outputs a disturbance vibration determination instruction signal based on vibration acceleration WL (f2) of second frequency band f2 of vibration wave W detected according to the vibration detection instruction signal. The disturbance vibration determination instruction signal is a first frequency of the vibration wave W in which a disturbance vibration WG that is vibration other than vibration (leakage vibration WO) due to leakage of the fluid 910 from the pipe 900 is detected according to the vibration detection instruction signal. It is a signal for determining whether or not it is superimposed in the band f1. Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100 described above can be integrated into the control apparatus 500.

  In addition, the processing apparatus according to the first embodiment of the present invention includes a frequency determination unit 121 and a disturbance vibration determination unit 122. The frequency determination unit 121 determines a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1. Based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W, the disturbance vibration determination unit 122 detects a vibration wave in which a disturbance vibration WG that is a vibration other than the leakage vibration WO is detected by the vibration detection unit. It is determined whether or not it is superimposed on the first frequency band f1 of W. Here, the vibration wave W is a wave propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. Leakage vibration WO is vibration due to leakage of the fluid 910 from the pipe 900. This processing apparatus also has the same effect as the defect analysis apparatus 100 described above.

  The defect analysis method according to the first embodiment of the present invention includes a vibration detection step, a frequency determination step, and a disturbance vibration presence / absence determination step. In the vibration detection step, the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900 is detected. In the frequency determination step, a first frequency band f1 that is a frequency band resulting from leakage of the fluid 910 from the pipe 900 and a second frequency band f2 different from the first frequency band f1 are determined. In the disturbance vibration determination step, based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W detected in the vibration detection step, the disturbance vibration WG that is a vibration other than the leakage vibration WO is detected in the vibration detection step. It is determined whether or not the vibration wave W detected in step 1 is superimposed on the first frequency band f1. The leakage vibration WO is vibration caused by leakage of the fluid 910 from the pipe 900. This method also provides the same effect as the defect analysis apparatus 100 described above. The storage medium according to the first embodiment of the present invention stores a program that causes a computer to perform the steps indicated in the defect analysis method described above. This storage medium also has the same effect as the defect analysis apparatus 100 described above.

<Second Embodiment>
The configuration of the defect analysis apparatus 100A in the second embodiment of the present invention will be described.

  FIG. 5 is a conceptual diagram of a defect analysis apparatus 100A according to the second embodiment of the present invention. In FIG. 5, constituent elements that are equivalent to the constituent elements shown in FIGS. 1 to 4 are given the same reference numerals as those shown in FIGS. 1 to 4.

  As shown in FIG. 5, the defect analysis apparatus 100A includes a first vibration detection unit 110A, a second vibration detection unit 110B, and a processing unit 120A.

  The first and second vibration detection units 110A and 110B and the processing unit 120A are connected to each other by wired or wireless communication.

  As shown in FIG. 5, the processing unit 120A is connected to the first vibration detection unit 110A and the second vibration detection unit 110B by wire or wirelessly. The processing unit 120A receives the data of the vibration wave W detected by the first or second vibration detection unit 110A or 110B.

  As illustrated in FIG. 5, the processing unit 120 </ b> A includes a frequency determination unit 121, a disturbance vibration determination unit 122, and a disturbance vibration reduction unit 123.

  Here, FIG. 1 and FIG. 5 are compared. In FIG. 1, the processing unit 120 includes a frequency determination unit 121 and a disturbance vibration determination unit 122. In contrast, in FIG. 5, the processing unit 120 </ b> A includes a frequency determination unit 121, a disturbance vibration determination unit 122, and a disturbance vibration reduction unit 123. That is, FIG. 5 is different from FIG. 1 in that the processing unit 120A includes a disturbance vibration reducing unit 123.

  When the disturbance vibration determination unit 122 determines that the disturbance vibration WG is superimposed in the first frequency band f1 of the vibration wave W, the disturbance vibration reduction unit 123 has the second frequency band f2 of the vibration wave W. Based on the vibration acceleration WL (f2), the disturbance vibration WG superimposed on the first frequency band f1 of the vibration wave W is reduced. Specifically, the disturbance vibration reducing unit 123 superimposes the disturbance vibration reducing unit 123 in the first frequency band f1 of the vibration wave W based on the peak value of the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W. An operation is performed to subtract a predetermined value from the peak value of the disturbance vibration WG. Note that the peak value here refers to the value of the peak portion of a mountain generated in the graph when the graph of the vibration wave W is written with the horizontal axis representing the frequency and the vertical axis representing the vibration acceleration.

  Next, the operation of the defect analysis apparatus 100A in the second embodiment of the present invention will be described.

  FIG. 6 is a diagram showing an operation flow of the defect analysis apparatus 100A according to the second embodiment of the present invention. In FIG. 6, constituent elements equivalent to those shown in FIGS. 1 to 5 are given the same reference numerals as those shown in FIGS. 1 to 5. Further, in the description of FIG. 6, the contents overlapping with those of FIG. 2 will be briefly described.

  As shown in FIG. 6, first, the first and second vibration detection units 110A and 110B detect the first or second vibration waves W1 and W2 (S1). More specifically, the first or second vibration detection unit 110A, 110B detects the vibration propagating through the pipe 900 or the fluid 910 flowing through the pipe 900 as the first or second vibration wave W1, W2. . Then, the first or second vibration detection unit 110A or 110B transmits one of the first or second vibration wave W1 and W2 as the vibration wave W to the processing unit 120A. Next, the processing unit 120A receives the vibration wave W.

  Next, the frequency determination unit 121 determines a first frequency band f1 that is a frequency band resulting from leakage of the fluid 910 from the pipe 900 (S2).

  Next, the processing unit 120A determines whether or not the vibration acceleration of the first frequency band f1 of the vibration wave W1 is greater than or equal to a threshold value (S3). Specifically, the disturbance vibration determination unit 122 determines whether or not the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1) (S3).

  Here, FIG. 7 is a conceptual diagram for explaining operations of the disturbance vibration determination unit 122 and the disturbance vibration reduction unit 123. 7A to 7D, the vibration acceleration is set on the vertical axis and the frequency is set on the horizontal axis. 7A to 7C are the same as FIGS. 3A to 3C.

  FIG. 7A is a diagram illustrating an example of the vibration wave W detected by the first or second vibration detection unit 110A or 110B, particularly including the vicinity of the first frequency band f1. FIGS. 7B and 7C are examples of the vibration wave W detected by the first or second vibration detectors 110A and 110B, and in particular, the first frequency band f1 and the second frequency band f2. It is a figure which shows what includes the vicinity. FIG. 7B shows an example in which the disturbance vibration WG is included in the second frequency band f2. FIG. 7C shows an example in which the disturbance vibration WG is not included in the second frequency band f2. FIG. 7D shows a vibration wave after reducing the disturbance vibration WG included in the first frequency band f1 among the vibration waves W detected by the first or second vibration detection unit 110A or 110B. Indicates. As described above, the first frequency band f1 is a frequency band caused by the leakage of the fluid 910 from the pipe 900. Here, the first frequency band f1 is also referred to as a leakage vibration band.

  As shown in FIG. 7A, the disturbance vibration determination unit 122 compares the vibration acceleration WL (f1) of the vibration wave W1 in the first frequency band f1 with the threshold WL-0 (f1). Then, as shown in FIG. 6, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1). (S3, YES), the frequency determination unit 121 determines a second frequency band f2 different from the first frequency band f1 (S4).

  On the other hand, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is not greater than or equal to the threshold WL-0 (f1) (S3, NO), the processing unit 120A. Determines that there is no leakage in the pipe 900 (S5). Then, the process returns to S1.

  When the second frequency band f2 is determined by the frequency determination unit 121 (S4), the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2 is a predetermined threshold WL. It is determined whether or not −0 (f2) or more (S6).

  Then, as shown in FIG. 7B, when the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122. (S6 in FIG. 6, YES), the disturbance vibration reducing unit 123 determines the first frequency of the vibration wave W based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W. The vibration acceleration of the vibration wave W in the band f1 is reduced (S10).

  That is, at this time, as shown in FIG. 7D, the disturbance vibration reducing unit 123 performs the first vibration wave W first based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W. The disturbance vibration WG superimposed in the frequency band f1 is reduced. Thereby, the defect analysis apparatus 100A can reduce the vibration acceleration of the disturbance vibration WG included in the vibration wave W in the first frequency band f1 which is a frequency band caused by the leakage of the fluid 910 from the pipe 900. As a result, the defect analysis apparatus 100A can obtain the leakage vibration WO in which the influence of the disturbance vibration WG is reduced in the first frequency band f1, which is the frequency band resulting from the leakage of the fluid 910 from the pipe 900. .

  On the other hand, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is not equal to or greater than the predetermined threshold WL-0 (f2) (S6 in FIG. 6, NO ), The disturbance vibration determination unit 122 determines that the disturbance vibration WG, which is vibration other than the leakage vibration WO, is not superimposed on the first frequency band f1 of the vibration wave W, and the processing unit 120A leaks into the pipe 900. It is determined that there is (S12).

  After the process of S10, the disturbance vibration determination unit 122 again determines whether the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1), similarly to the process of S3. It is determined whether or not (S11).

  When the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is greater than or equal to the threshold WL-0 (f1) (S11, YES), the processing unit 120A determines that there is a leak in the pipe 900 (S12).

  On the other hand, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is not equal to or greater than the threshold WL-0 (f1) (S11, NO), the processing unit 120A. Determines that there is no leakage in the pipe 900 (S13). Then, the process returns to S1.

  The operation of the defect analysis apparatus 100A according to the second embodiment of the present invention has been described above.

  In addition, a control device 500A for inputting / outputting signals among the first or second vibration detection units 110A and 110B, the frequency determination unit 121, the disturbance vibration determination unit 122, and the disturbance vibration reduction unit 123 is newly provided. May be.

  FIG. 8 is a diagram illustrating a signal output relationship of the control device 500A. As illustrated in FIG. 8, the control device 500A outputs a vibration detection instruction signal to the first or second vibration detection unit 110A or 110B. The vibration detection instruction signal is a signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing in the pipe 900.

  Control device 500A outputs a frequency determination instruction signal to frequency determination unit 121. The frequency determination instruction signal is a signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1.

  Control device 500A outputs a disturbance vibration determination instruction signal to disturbance vibration determination unit 122 based on vibration acceleration WL (f2) of second frequency band f2 of vibration wave W detected according to the vibration detection instruction signal. The disturbance vibration determination instruction signal is a first frequency of the vibration wave W in which a disturbance vibration WG that is vibration other than vibration (leakage vibration WO) due to leakage of the fluid 910 from the pipe 900 is detected according to the vibration detection instruction signal. It is a signal for determining whether or not it is superimposed in the band f1.

  When it is determined by the disturbance vibration determination instruction signal that the control device 500A is superposed in the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal, the vibration detected according to the vibration detection instruction signal Based on the vibration acceleration WL (f2) of the second frequency band f2 of the wave W, a disturbance reduction instruction signal is output to the disturbance vibration reduction unit 123. The disturbance reduction instruction signal is a signal for reducing the disturbance vibration WG superimposed in the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal.

  Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100A described above can be integrated into the control apparatus 500A.

  As described above, the defect analysis apparatus 100A according to the second embodiment of the present invention further includes the disturbance vibration reducing unit 123 (disturbance vibration reducing means). When the disturbance vibration determination unit 122 determines that the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W, the disturbance vibration reduction unit 123 sets the second vibration of the vibration wave W in the second frequency band f2. Based on the vibration acceleration WL (f2), the disturbance vibration WG superimposed on the first frequency band f1 of the vibration wave W is reduced.

  As described above, the disturbance vibration reduction unit 123 determines the first frequency of the vibration wave W based on the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W according to the determination result of the disturbance vibration determination unit 122. The disturbance vibration WG superimposed in the band f1 is reduced. Thereby, the defect analysis apparatus 100A can easily reduce the vibration acceleration of the disturbance vibration WG included in the vibration wave W in the first frequency band f1, which is the frequency band caused by the leakage of the fluid 910 from the pipe 900. . As a result, the defect analysis apparatus 100A can obtain the leakage vibration WO in which the influence of the disturbance vibration WG is reduced in the first frequency band f1, which is the frequency band resulting from the leakage of the fluid 910 from the pipe 900. .

  In addition, control device 500A in the second embodiment of the present invention outputs a vibration detection instruction signal. The vibration detection instruction signal is a signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing in the pipe 900. Control device 500A outputs a frequency determination signal. The frequency determination signal is a signal for determining a first frequency band f1 which is a frequency band resulting from leakage of the fluid 910 from the pipe 900 and a second frequency band f2 different from the first frequency band f1. Control device 500A outputs a disturbance vibration determination signal based on vibration acceleration WL (f2) of second frequency band f2 of vibration wave W detected according to the vibration detection instruction signal. The disturbance vibration determination signal is a first frequency band of the vibration wave W in which the disturbance vibration WG, which is vibration other than vibration due to leakage of the fluid 910 from the pipe 900 (leakage vibration WO), is detected according to the vibration detection instruction signal. It is a signal for determining whether or not it is superimposed in f1. When it is determined by the disturbance vibration determination instruction signal that the control device 500A is superposed in the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal, the vibration detected according to the vibration detection instruction signal Based on the vibration acceleration WL (f2) of the second frequency band f2 of the wave W, a disturbance reduction instruction signal is output. The disturbance reduction instruction signal is a signal for reducing the disturbance vibration WG superimposed in the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal. Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100A described above can be integrated into the control apparatus 500A.

<Third Embodiment>
The configuration of the defect analysis apparatus 100B in the third embodiment of the present invention will be described.

  FIG. 9 is a conceptual diagram of a defect analysis apparatus 100B according to the third embodiment of the present invention. In FIG. 9, constituent elements equivalent to those shown in FIGS. 1 to 8 are given the same reference numerals as those shown in FIGS. 1 to 8.

  As shown in FIG. 9, the defect analysis apparatus 100B includes a first vibration detection unit 110A, a second vibration detection unit 110B, and a processing unit 120B.

  The first and second vibration detection units 110A and 110B and the processing unit 120B are connected by wire or wireless communication.

  As shown in FIG. 9, the processing unit 120B is connected to the first vibration detection unit 110A and the second vibration detection unit 110B by wire or wirelessly. The processing unit 120B receives the data of the vibration wave W detected by the first or second vibration detection unit 110A or 110B.

  As illustrated in FIG. 9, the processing unit 120 </ b> B includes a frequency determination unit 121, a disturbance vibration determination unit 122, and a temperature detection unit 124.

  Here, FIG. 1 and FIG. 9 are compared. In FIG. 1, the processing unit 120 includes a frequency determination unit 121 and a disturbance vibration determination unit 122. In contrast, in FIG. 9, the processing unit 120 </ b> B includes a frequency determination unit 121, a disturbance vibration determination unit 122, and a temperature detection unit 124. That is, FIG. 9 is different from FIG. 1 in that the processing unit 120B includes the temperature detection unit 124.

  As shown in FIG. 9, the temperature detection unit 124 is included in the processing unit 120B. The temperature detection unit 124 detects the temperature of the pipe 900 or the fluid 910 flowing through the pipe 900.

  Next, the operation of the defect analysis apparatus 100B according to the third embodiment of the present invention will be described.

  FIG. 10 is a diagram showing an operation flow of the defect analysis apparatus 100B according to the third embodiment of the present invention. In FIG. 10, constituent elements equivalent to those shown in FIGS. 1 to 9 are given the same reference numerals as those shown in FIGS. 1 to 9. Further, in the description of FIG. 10, the contents overlapping with those of FIG. 2 will be briefly described.

  As shown in FIG. 10, first, the first and second vibration detection units 110A and 110B detect the first or second vibration waves W1 and W2 (S1). More specifically, the first or second vibration detection unit 110A, 110B detects the vibration propagating through the pipe 900 or the fluid 910 flowing through the pipe 900 as the first or second vibration wave W1, W2. . Then, the first or second vibration detection unit 110A or 110B transmits one of the first or second vibration wave W1 and W2 as the vibration wave W to the processing unit 120B. Next, the processing unit 120B receives the vibration wave W.

  Next, the frequency determination unit 121 determines a first frequency band f1 that is a frequency band resulting from leakage of the fluid 910 from the pipe 900 (S2).

  Next, the processing unit 120 determines whether or not the vibration acceleration of the first frequency band f1 of the vibration wave W1 is greater than or equal to a threshold value (S3). More specifically, the disturbance vibration determination unit 122 determines whether or not the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1) (S3). .

  As shown in FIG. 3A, the disturbance vibration determination unit 122 compares the vibration acceleration WL (f1) of the vibration wave W1 in the first frequency band f1 with the threshold WL-0 (f1). Then, as shown in FIG. 10, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1). (S3, YES), the frequency determination unit 121 determines a second frequency band f2 different from the first frequency band f1 (S4).

  On the other hand, if the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is not greater than or equal to the threshold WL-0 (f1) (S3, NO), the disturbance vibration determination The part 122 determines that there is no leakage in the pipe 900 (S5). Then, the process returns to S1.

  When the second frequency band f2 is determined by the frequency determination unit 121 (S4), the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2 is a predetermined threshold WL. It is determined whether or not −0 (f2) or more (S6).

  Then, as shown in FIG. 3B, when the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122 (S6 in FIG. 10, YES), the disturbance vibration determination unit 122 superimposes a disturbance vibration WG that is a vibration other than the leakage vibration WO in the first frequency band f1 of the vibration wave W. (S7). This process corresponds to the first process of the present invention.

  On the other hand, as shown in FIG. 3C, if the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is not equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122 When it is determined (S6 in FIG. 10, NO), the temperature detection unit 124 detects the temperature of the pipe 900 or the fluid 910 flowing through the pipe 900 (S13).

  As shown in FIG. 10, after the process of S13, the disturbance vibration determination unit 122 performs the first frequency band of the vibration wave W when the temperature detected by the temperature detection unit 124 changes in the process of S13. It is determined whether or not the vibration acceleration or frequency of f1 changes by a predetermined value or more (S14). This process corresponds to the second process of the present invention. The predetermined value can be arbitrarily set.

  When the vibration acceleration or frequency in the first frequency band f1 of the vibration wave W changes when the temperature detected by the temperature detection unit 124 changes, the disturbance vibration determination unit 122 determines that the disturbance (S14, YES), the disturbance The vibration determination unit 122 determines that the disturbance vibration WG, which is vibration other than the leakage vibration WO, is superimposed on the first frequency band f1 of the vibration wave W (S7).

  On the other hand, when the disturbance vibration determination unit 122 determines that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W does not change when the temperature detected by the temperature detection unit 124 changes (S14, NO) ), The disturbance vibration determination unit 122 determines that the disturbance vibration WG, which is a vibration other than the leakage vibration WO, is not superimposed within the first frequency band f1 of the vibration wave W, and determines that the pipe 900 has a leak. (S15).

  Here, FIG. 11 is a diagram showing an example of the relationship between the frequency and amplitude acceleration of the fluid vibration when the temperature change is given to the fluid 910. As shown in FIG. 11, when the fluid 910 is set to different temperatures T1 and T2, the vibration acceleration and frequency of the fluid vibration change. Specifically, when the temperature of the fluid 910 is changed from T1 to T2, the amplitude acceleration decreases and the frequency increases. Here, it is assumed that there is no disturbance vibration WG. In other words, in a state where there is no disturbance vibration WG, when the temperature of the fluid 910 is changed, the vibration acceleration and frequency of the fluid vibration change. The disturbance vibration WG is independent of the temperature of the fluid 910. For this reason, even if a temperature change is given to the fluid 910, the disturbance vibration WG does not change. Using this characteristic, the disturbance vibration determination unit 122 executes the processes of S13 to S15.

  The operation of the defect analysis apparatus 100B according to the third embodiment of the present invention has been described above.

  In addition, a control device 500B that inputs and outputs signals between the first or second vibration detection units 110A and 110B, the frequency determination unit 121, the disturbance vibration determination unit 122, and the temperature detection unit 124 is newly provided. Also good.

  FIG. 12 is a diagram illustrating a signal output relationship of the control device 500B. As illustrated in FIG. 12, the control device 500B outputs a vibration detection instruction signal to the first or second vibration detection unit 110A or 110B. The vibration detection instruction signal is a signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing in the pipe 900.

  Control device 500B outputs a frequency determination instruction signal to frequency determination unit 121. The frequency determination instruction signal is a signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1.

  Control device 500B outputs a temperature detection instruction signal to temperature detection unit 124. The temperature detection instruction signal is a signal for detecting the temperature of the pipe 900 or the fluid 910 flowing in the pipe 900.

  The control device 500B outputs a first process execution instruction signal for executing the first process and a second process execution instruction signal for executing the second process to the disturbance vibration determination unit 122.

  Note that the first process determines whether or not the disturbance vibration WG is superimposed in the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the first process criterion. It is processing. Here, the first processing criterion is that the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W detected by the vibration detection unit (the first vibration detection units 110A and 110B) is a predetermined threshold WL. Whether it exceeds −0 (f2).

  The second process is performed when it is determined in the first process that the disturbance vibration WG is not superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit. The second process is a process for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the second processing criterion. . Here, the second processing standard is that the vibration acceleration or frequency in the first frequency band f1 of the vibration wave W detected by the vibration detection unit when the temperature detected by the temperature detection unit 124 changes is a predetermined value. Whether it changes or not.

  Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100B described above can be integrated into the control apparatus 500B.

  As described above, the defect analysis apparatus 100B according to the third embodiment of the present invention includes the temperature detection unit 124 (temperature detection means). The temperature detection unit 124 detects the temperature of the pipe 900 or the fluid 910 flowing through the pipe 900. Further, the disturbance vibration determination unit 122 executes the following first process and second process.

  In other words, the first process determines whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit, based on a first processing criterion described later. It is processing to do. The first processing criterion is that the vibration acceleration WL (f2) in the second frequency band f2 of the vibration wave W detected by the vibration detection unit (first vibration detection unit 110A, 110B) is a predetermined threshold WL-0 ( Whether or not f2) is exceeded.

  Further, in the second process, when it is determined that the disturbance vibration WG is not superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit in the first process, the second process described later is performed. This is a process for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the processing standard. The second processing criterion is that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W detected by the vibration detection unit changes by a predetermined value or more when the temperature detected by the temperature detection unit 124 changes. Whether or not.

  As described above, in the defect analysis apparatus 100B, the first and second processes are performed to determine whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit. Two stages of processing are set. Thereby, it can be determined more accurately whether the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit.

  In addition, the control device 500B according to the third embodiment of the present invention outputs a vibration detection instruction signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. Control device 500B outputs a frequency determination instruction signal. The frequency determination instruction signal is a signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1.

  The control device 500B outputs a temperature detection instruction signal for detecting the temperature of the pipe 900 or the fluid 910 flowing through the pipe 900.

  The control device 500B outputs a first process execution instruction signal for executing the first process and a second process execution instruction signal for executing the second process.

  Note that the first process determines whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit, based on a first process criterion described later. It is processing to do. The first processing criterion is that the vibration acceleration WL (f2) in the second frequency band f2 of the vibration wave W detected by the vibration detection unit (first vibration detection unit 110A, 110B) is a predetermined threshold WL-0 ( Whether or not f2) is exceeded.

  Further, in the second process, when it is determined that the disturbance vibration WG is not superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit in the first process, the second process described later is performed. This is a process for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the processing standard. The second processing criterion is that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W detected by the vibration detection unit changes by a predetermined value or more when the temperature detected by the temperature detection unit 124 changes. Whether or not.

  Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100B described above can be integrated into the control apparatus 500B.

<Fourth embodiment>
A configuration of a defect analysis apparatus 100C according to the fourth embodiment of the present invention will be described.

  FIG. 13 is a conceptual diagram of a defect analysis apparatus 100C according to the fourth embodiment of the present invention. In FIG. 13, constituent elements that are equivalent to the constituent elements shown in FIGS. 1 to 12 are assigned the same reference numerals as those shown in FIGS. 1 to 12.

  As shown in FIG. 13, the defect analysis apparatus 100C includes a first vibration detection unit 110A, a second vibration detection unit 110B, and a processing unit 120C.

  The first and second vibration detection units 110A and 110B and the processing unit 120C are connected by wire or wireless communication.

  As shown in FIG. 13, the processing unit 120C is connected to the first vibration detection unit 110A and the second vibration detection unit 110B by wire or wirelessly. The processing unit 120C receives data of the vibration wave W detected by the first or second vibration detection unit 110A or 110B.

  As illustrated in FIG. 13, the processing unit 120 </ b> C includes a frequency determination unit 121, a disturbance vibration determination unit 122, and a pressure detection unit 125.

  Here, FIG. 1 and FIG. 13 are compared. In FIG. 1, the processing unit 120 includes a frequency determination unit 121 and a disturbance vibration determination unit 122. In contrast, in FIG. 13, the processing unit 120 </ b> C includes a frequency determination unit 121, a disturbance vibration determination unit 122, and a pressure detection unit 125. That is, FIG. 13 is different from FIG. 1 in that the processing unit 120 </ b> C has a pressure detection unit 125.

  As shown in FIG. 13, the pressure detection unit 125 is included in the processing unit 120C. The pressure detection unit 125 detects the pressure of the pipe 900 or the fluid 910 flowing through the pipe 900.

  Next, the operation of the defect analysis apparatus 100C in the fourth embodiment of the present invention will be described.

  FIG. 14 is a diagram showing an operation flow of the defect analysis apparatus 100C according to the fourth embodiment of the present invention. In FIG. 14, constituent elements that are equivalent to the constituent elements shown in FIGS. 1 to 13 are given the same reference numerals as those shown in FIGS. 1 to 13. Further, in the description of FIG. 14, the content overlapping with the description of FIG. 2 will be briefly described.

  As shown in FIG. 14, first, the first and second vibration detection units 110A and 110B detect the first or second vibration waves W1 and W2 (S1). More specifically, the first or second vibration detection unit 110A, 110B detects the vibration propagating through the pipe 900 or the fluid 910 flowing through the pipe 900 as the first or second vibration wave W1, W2. . Then, the first or second vibration detection unit 110A or 110B transmits one of the first or second vibration wave W1 and W2 as the vibration wave W to the processing unit 120C. Next, the processing unit 120C receives the vibration wave W.

  Next, the frequency determination unit 121 determines a first frequency band f1 that is a frequency band resulting from leakage of the fluid 910 from the pipe 900 (S2).

  Next, the processing unit 120C determines whether or not the vibration acceleration of the first frequency band f1 of the vibration wave W1 is greater than or equal to a threshold value (S3). Specifically, the disturbance vibration determination unit 122 determines whether or not the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1) (S3).

  As shown in FIG. 3A, the disturbance vibration determination unit 122 compares the vibration acceleration WL (f1) of the vibration wave W1 in the first frequency band f1 with the threshold WL-0 (f1). Then, as shown in FIG. 14, when the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is equal to or greater than the threshold WL-0 (f1). (S3, YES), the frequency determination unit 121 determines a second frequency band f2 different from the first frequency band f1 (S4).

  On the other hand, if the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f1) of the first frequency band f1 of the vibration wave W1 is not greater than or equal to the threshold WL-0 (f1) (S3, NO), the disturbance vibration determination The part 122 determines that there is no leakage in the pipe 900 (S5). Then, the process returns to S1.

  When the second frequency band f2 is determined by the frequency determination unit 121 (S4), the disturbance vibration determination unit 122 determines that the vibration acceleration WL (f2) of the vibration wave W in the second frequency band f2 is a predetermined threshold WL. It is determined whether or not −0 (f2) or more (S6).

  Then, as shown in FIG. 3B, when the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122 (S6 in FIG. 14, YES), the disturbance vibration determination unit 122 superimposes a disturbance vibration WG that is a vibration other than the leakage vibration WO in the first frequency band f1 of the vibration wave W. (S7). This process corresponds to the first process of the present invention.

  On the other hand, as shown in FIG. 3C, if the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W is not equal to or greater than a predetermined threshold WL-0 (f2), the disturbance vibration determination unit 122 When it is determined (S6 of FIG. 14, NO), the pressure detection unit 125 detects the pressure of the pipe 900 or the fluid 910 flowing through the pipe 900 (S16).

  As shown in FIG. 14, after the process of S16, the disturbance vibration determination unit 122 performs the first frequency band of the vibration wave W when the pressure detected by the pressure detection unit 125 changes in the process of S16. It is determined whether or not the vibration acceleration or frequency of f1 changes by a predetermined value or more (S17). This process corresponds to the third process of the present invention.

  When the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W changes when the pressure detected by the pressure detection unit 125 changes, the disturbance vibration determination unit 122 determines that the disturbance (S17, YES), the disturbance The vibration determination unit 122 determines that the disturbance vibration WG, which is vibration other than the leakage vibration WO, is superimposed in the first frequency band f1 of the vibration wave W (S7).

  On the other hand, when the disturbance vibration determination unit 122 determines that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W does not change when the temperature detected by the pressure detection unit 125 changes (S17, NO) ), The disturbance vibration determination unit 122 determines that the disturbance vibration WG, which is a vibration other than the leakage vibration WO, is not superimposed within the first frequency band f1 of the vibration wave W, and determines that the pipe 900 has a leak. (S18).

  Here, FIG. 15 is a diagram illustrating an example of the relationship between the frequency of fluid vibration and the vibration acceleration when different pressures are applied to the fluid 910. As shown in FIG. 15, when different pressures P1 and P2 are applied to the fluid 910, the amplitude and frequency of the fluid vibration change. Specifically, when the pressure applied to the fluid 910 is changed from P1 to P2, the vibration acceleration decreases and the frequency increases. Here, it is assumed that there is no disturbance vibration WG. That is, in the state where there is no disturbance vibration WG, when different pressure changes are applied to the fluid 910, the vibration acceleration and frequency of the fluid vibration change. The disturbance vibration WG is independent of the temperature of the fluid 910. For this reason, even if different temperature changes are given to the fluid 910, the disturbance vibration WG does not change. Using this characteristic, the disturbance vibration determination unit 122 executes the processes of S16 to S18.

  The operation of the defect analysis apparatus 100C according to the fourth embodiment of the present invention has been described above.

  Note that a control device 500C that inputs and outputs signals between the first or second vibration detection units 110A and 110B, the frequency determination unit 121, the disturbance vibration determination unit 122, and the pressure detection unit 125 may be newly provided. .

  FIG. 16 is a diagram illustrating a signal output relationship of the control device 500C. As illustrated in FIG. 16, the control device 500C causes the first or second vibration detection unit 110A or 110B to detect the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. An instruction signal is output.

  The control device 500C receives a frequency determination instruction signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1. And output to the frequency determination unit 121.

  The control device 500C outputs a pressure detection instruction signal for detecting the pressure of the pipe 900 or the fluid 910 flowing in the pipe 900 to the pressure detection unit 125.

  The control device 500C outputs to the disturbance vibration determination unit 122 a first process execution instruction signal for executing the first process and a second process execution instruction signal for executing the third process.

  The first process is a process of determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the first processing standard. It is. The first processing criterion is that the vibration acceleration WL (f2) in the second frequency band f2 of the vibration wave W detected by the vibration detection unit (first vibration detection unit 110A, 110B) is a predetermined threshold WL-0 ( Whether or not f2) is exceeded.

  The third process is the third process when it is determined in the first process that the disturbance vibration WG is not superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit. This is a process for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the reference. The third processing criterion is that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W detected by the vibration detection unit changes by a predetermined value or more when the pressure detected by the pressure detection unit 125 changes. Whether or not.

  Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100C described above can be integrated into the control apparatus 500C.

  As described above, the defect analysis apparatus 100C according to the fourth embodiment of the present invention includes the pressure detection unit 125 (pressure detection means). The pressure detection unit 125 detects the pressure of the pipe 900 or the fluid 910 flowing through the pipe 900. Further, the disturbance vibration determination unit 122 executes the following first process and third process.

  That is, in the first process, whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit, based on the first process standard, as described above. It is a process which determines. The first processing criterion is that the vibration acceleration WL (f2) in the second frequency band f2 of the vibration wave W detected by the vibration detection unit (first vibration detection unit 110A, 110B) is a predetermined threshold WL-0 ( Whether or not f2) is exceeded.

  The third process is the third process when it is determined in the first process that the disturbance vibration WG is not superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit. This is a process for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit based on the reference. The third processing criterion is that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W detected by the vibration detection unit changes by a predetermined value or more when the pressure detected by the pressure detection unit 125 changes. Whether or not.

  As described above, in the defect analysis apparatus 100C, the first and third processes for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit. Are set in two stages. Thereby, it can be determined more accurately whether the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected by the vibration detection unit.

  In addition, the control device 500C according to the fourth embodiment of the present invention outputs a vibration detection instruction signal for detecting the vibration wave W propagating through the pipe 900 or the fluid 910 flowing through the pipe 900. The control device 500C receives a frequency determination instruction signal for determining a first frequency band f1 that is a frequency band due to leakage of the fluid 910 from the pipe 900 and a second frequency band f2 that is different from the first frequency band f1. Output. The control device 500C outputs a pressure detection instruction signal for detecting the pressure of the pipe 900 or the fluid 910 flowing in the pipe 900. The control device 500C outputs a first process execution instruction signal for executing the first process and a third process execution instruction signal for executing the third process.

  The first process determines whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal based on the first processing criterion. It is processing. The first processing criterion is whether or not the vibration acceleration WL (f2) of the second frequency band f2 of the vibration wave W detected according to the vibration detection instruction signal exceeds a predetermined threshold WL-0 (f2).

  Further, when it is determined in the first process that the disturbance vibration WG is not superimposed on the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal, This is a process for determining whether or not the disturbance vibration WG is superimposed on the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal based on the processing standard. Thereby, the signal processing for operating the main functions of the defect analysis apparatus 100C described above can be integrated into the control apparatus 500C. The third processing criterion is that the vibration acceleration or frequency of the first frequency band f1 of the vibration wave W detected according to the vibration detection instruction signal changes by a predetermined value or more when the pressure detected according to the pressure detection instruction signal changes. Whether to do it.

  In the description of the first to fourth embodiments, it is assumed that there is one second frequency band f2. On the other hand, in the first to fourth embodiments, a plurality of second frequency bands f2 may be provided.

  FIG. 17 is a diagram illustrating a vibration wave W when a plurality of second frequency bands f2 are provided. Here, an example is shown in which a disturbance vibration WG is included in each of the plurality of second frequency bands f2. As described above, the first frequency band f1 is a frequency band caused by the leakage of the fluid 910 from the pipe 900. Here, the first frequency band f1 is also referred to as a leakage vibration band. In FIG. 17, two second frequency bands f2 (part 1) and (part 2) are shown. Of the vibration wave W, it is assumed that the wave in the second frequency band f2 (part 1) and the wave in the first frequency band f1 are correlated with each other. Similarly, in the vibration wave W, the wave in the second frequency band f2 (part 2) and the wave in the first frequency band f1 are correlated with each other.

  As described above, when a plurality of second frequency bands f2 are provided, the vibration wave W in the process of S6 of FIG. 2, the process of S6 of FIG. 6, the process of S6 of FIG. 10, and the process of S6 of FIG. Whether the vibration acceleration (for example, WL (f2) a or WL (f2) b) in the plurality of second frequency bands f2 is greater than or equal to a predetermined threshold WL-0 (f2). By determining by the determination unit 122, the next process is selected. Here, the case where two second frequency bands f2 are provided has been described with reference to FIG. On the other hand, three or more second frequency bands f2 may be provided. In this case, in the case where a plurality of second frequency bands f2 are provided, in the process of S6 of FIG. 2, the process of S6 of FIG. 6, the process of S6 of FIG. 10, and the process of S6 of FIG. The disturbance vibration determination unit 122 determines whether the vibration acceleration of a predetermined number or more among the vibration accelerations of the plurality of second frequency bands f2 is greater than or equal to a predetermined threshold WL-0 (f2), thereby A process is selected. Further, the disturbance vibration determination unit 122 determines whether or not all vibration accelerations of the plurality of second frequency bands f2 of the vibration wave W are equal to or greater than a predetermined threshold WL-0 (f2). May be selected.

  The apparatus of each embodiment of the present invention is also realized by a CPU (Central Processing Unit), a memory, and a program loaded in the memory of an arbitrary computer. The program includes a program stored in the memory from the stage of shipping the apparatus in advance, a program downloaded from a storage medium such as a CD (Compact Disc), a server on the Internet, and the like. The apparatus of each embodiment of the present invention is also realized by an arbitrary combination of hardware and software, mainly a storage unit such as a hard disk for storing the program and a network connection interface. It will be understood by those skilled in the art that there are various modifications to the implementation method and apparatus.

  In addition, the block diagram used in the description of each embodiment of the present invention shows functional unit blocks rather than hardware unit configurations. In these drawings, each device is described as being realized by one device, but the means for realizing it is not limited to this. That is, it may be a physically separated configuration or a logically separated configuration.

  The present invention has been described above using the above-described embodiment as an exemplary example. However, the present invention is not limited to the above-described embodiment. That is, the present invention can apply various modes that can be understood by those skilled in the art within the scope of the present invention.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2014-062964 for which it applied on March 26, 2014, and takes in those the indications of all here.

100, 100A, 100B, 100C Defect analyzer 110A First vibration detection unit 110B Second vibration detection unit 120, 120A, 120B, 120C Processing unit 121 Frequency determination unit 122 Disturbance vibration determination unit 123 Disturbance vibration reduction unit 124 Temperature detection Part 125 Pressure detection part 500, 500A, 500B, 500C Control device 600 Underground 700A, 700B Water sprinkler 900 Pipe 910 Fluid 920 Leakage hole

Claims (8)

Vibration detecting means for detecting a vibration wave propagating through a pipe or a fluid flowing in the pipe;
Frequency determining means for determining a first frequency band that is a frequency band resulting from leakage of the fluid from the pipe, and a second frequency band different from the first frequency band;
Based on the vibration acceleration of the second frequency band of the vibration wave detected by the vibration detection means, disturbance vibration that is vibration other than vibration caused by leakage of the fluid from the pipe is the vibration detection means. A defect analysis apparatus comprising: disturbance vibration determination means for determining whether or not the vibration wave detected by the step is superimposed in the first frequency band. When the disturbance vibration determination unit determines that the disturbance vibration is superimposed in the first frequency band of the vibration wave detected by the vibration detection unit,
Based on the vibration acceleration of the second frequency band of the vibration wave detected by the vibration detection means, the sound wave is superimposed in the first frequency band of the vibration wave detected by the vibration detection means. The defect analysis apparatus according to claim 1, further comprising disturbance vibration reducing means for reducing disturbance vibration. Temperature detecting means for detecting the temperature of the pipe or the fluid flowing in the pipe,
The disturbance vibration determination means includes
Based on whether or not the vibration acceleration in the second frequency band of the vibration wave detected by the vibration detection means exceeds a predetermined threshold, the disturbance vibration is detected by the vibration detection means. Performing a first process for determining whether or not the first frequency band is superimposed;
When it is determined in the first process that the disturbance vibration is not superimposed within the first frequency band of the vibration wave detected by the vibration detection unit, the temperature detected by the temperature detection unit The disturbance vibration is detected by the vibration detection means based on whether the vibration acceleration or frequency of the first frequency band of the vibration wave detected by the vibration detection means is changed by a predetermined value or more. 3. The defect analysis apparatus according to claim 1, wherein a second process is performed to determine whether or not the vibration wave detected by the method is superimposed in the first frequency band. Pressure detection means for detecting the pressure of the fluid flowing in the piping or the piping,
The disturbance vibration determination means executes the first process,
The pressure detected by the pressure detection means when it is determined in the first process that the disturbance vibration is not superimposed on the vibration wave detected by the vibration detection means within the first frequency band. The disturbance vibration is detected by the vibration detection means based on whether the vibration acceleration or frequency of the first frequency band of the vibration wave detected by the vibration detection means is changed by a predetermined value or more. 3. The defect analysis apparatus according to claim 1, wherein a third process is performed to determine whether or not the vibration wave detected by the method is superimposed in the first frequency band. Output a vibration detection instruction signal for detecting a vibration wave propagating through a pipe or a fluid flowing in the pipe,
Outputting a first frequency band that is a frequency band resulting from leakage of the fluid from the pipe and a second frequency band that is different from the first frequency band;
Based on vibration acceleration in the second frequency band of the vibration wave detected according to the vibration detection instruction signal, disturbance vibration that is vibration other than vibration caused by leakage of the fluid from the pipe is detected by the vibration detection. A control device that outputs a disturbance vibration determination instruction signal for determining whether or not the vibration wave detected in accordance with the instruction signal is superimposed in the first frequency band. A frequency determining means for determining a first frequency band that is a frequency band resulting from fluid leakage from the pipe, and a second frequency band different from the first frequency band;
Based on the vibration acceleration of the second frequency band of the vibration wave propagating through the pipe or the fluid flowing in the pipe, disturbance vibration that is vibration other than vibration caused by leakage of the fluid from the pipe is A processing apparatus comprising disturbance vibration determination means for determining whether or not the vibration wave detected by the vibration detection means is superimposed in the first frequency band. Detect vibration waves propagating in the pipe or fluid flowing in the pipe,
Determining a first frequency band that is a frequency band resulting from leakage of the fluid from the pipe, and a second frequency band different from the first frequency band;
Based on the vibration acceleration of the second frequency band of the vibration wave, disturbance vibration that is vibration other than vibration caused by leakage of the fluid from the pipe is within the first frequency band of the vibration wave. A defect analysis method for determining whether or not they are superimposed. Detect vibration waves propagating in the pipe or fluid flowing in the pipe,
Determining a first frequency band that is a frequency band resulting from leakage of the fluid from the pipe, and a second frequency band different from the first frequency band;
Based on the vibration acceleration of the second frequency band of the vibration wave, disturbance vibration that is vibration other than vibration caused by leakage of the fluid from the pipe is within the first frequency band of the vibration wave. A storage medium for storing a program for causing a computer to perform a process of determining whether or not they are superimposed.

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