JP6487181B2 - Inspection support apparatus, inspection support method, inspection support program, and inspection support system - Google Patents

Description

  The present invention relates to an inspection support apparatus, an inspection support method, an inspection support program, and an inspection support system that support a hammering inspection of a structure.

  For the hammering inspection performed on a structure such as concrete, a hammer is used to hit the structure and the user can judge whether the sound is healthy or deformed by listening to the hammering sound. There is a method of analyzing a hit sound using a sound inspection device and determining whether the sound is sound or deformed based on the analysis result.

  In the sound hit inspection that distinguishes the sound of the user, it is difficult to make an accurate determination in the surrounding environment where there is a running sound or reverberation sound of the vehicle. Inspection is being carried out. For example, a sound-inspecting apparatus that determines whether the vicinity of a hitting point of a structure is sound or deformed by performing the processes shown in (1) to (4) is known. According to the sound inspection device, (1) the structure to be inspected is hit with a hammer or the like, and the time series data of the sound signal collected through the microphone installed in the vicinity of the hit point is acquired. The obtained time series data is analyzed using an autoregressive model, and autoregressive coefficients are obtained in advance. (2) The structure to be inspected is hit with a hammer or the like, and the time-series data of the hitting sound is measured using a microphone installed in the vicinity of the hitting point to obtain an actual measurement value. (3) Applying the actual measurement value and the autoregressive coefficient, predicting the time-series data of the hitting signal at the examination site, and obtaining the predicted value. (4) A residual that is a difference between the actual measurement value and the predicted value is obtained, and the presence or absence of an internal defect is determined based on the magnitude of the residual. See, for example, US Pat.

  In addition, as a related technology, moving the polygonal head against the surface of a concrete structure and analyzing the change in strength of the rolling sound with respect to the frequency distribution of the rolling sound generated by that, A technique is known in which a portion having a higher strength than other portions is determined as a portion having a deformation. See, for example, US Pat.

  However, when executing the analysis of the hitting sound and the process of determining the deformation of the structure, since the processes (1) to (4) and the frequency analysis process are performed, hardware having high processing capability is required. Necessary. Therefore, there is a problem that the physique (dimensions, weight, etc.) of the hammering inspection device is increased. In addition, since the user is not able to carry a hammering test apparatus having a large physique, it is difficult to perform a hammering test in real time, such as a hammering test in which the user recognizes the hammering sound.

JP 2009-04-1978 A JP 2013-253947 A

  An object according to one aspect of the present invention is to improve the determination accuracy of a hammering test by a user, and to make the physique of a device that supports the hammering test portable so that the user can carry it.

An examination support apparatus which is one of the aspects includes a calculation unit and a determination unit.
The calculation unit elapses a predetermined time from the time when the maximum sound pressure value, the first value calculated based on the maximum sound pressure value and the predetermined time in the hit sound of the acquired structure, and the predetermined time are acquired. A second value calculated based on each of the sound pressure values acquired during the period until the evaluation is performed, and the ratio between the second value and the first value is multiplied by the maximum sound pressure value to obtain an evaluation value Is calculated.

  The determination unit determines that the structure is deformed when the evaluation value is equal to or greater than the threshold value.

  While helping the user to improve the accuracy of the hammering test, the physique of the device that supports the hammering test can be made portable by the user.

FIG. 1 is a diagram illustrating an embodiment of an inspection support apparatus. FIG. 2 is a diagram illustrating an example of a processing unit of the inspection support apparatus. FIG. 3 is a diagram illustrating an example of a structure hitting method. FIG. 4 is a diagram for explaining soundness and deformation. FIG. 5 is a diagram for explaining calculation of an evaluation value. FIG. 6 is a diagram for explaining calculation of an evaluation value. FIG. 7 is a diagram for explaining calculation of the evaluation value. FIG. 8 is a diagram for explaining calculation of an evaluation value. FIG. 9 is a flowchart showing an embodiment of the operation of the inspection support apparatus. FIG. 10 is a diagram for explaining the process of notifying the deformation. FIG. 11 is a diagram illustrating an example of hardware of the inspection support apparatus. FIG. 12 is a diagram illustrating an example of an inspection support system.

Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating an embodiment of an inspection support apparatus.
The inspection support apparatus 1 includes a sound collection unit 2, an adjustment unit 3, a loudspeaker unit 4, a processing unit 5, and a display unit 6.

  The sound collecting unit 2 is, for example, a microphone that collects a sound generated when a structure is struck. The hitting sound is collected as an audio signal, and the collected audio signal is called a sound pressure signal.

  The adjusting unit 3 performs adjustment by performing voice enhancement processing on the hitting sound acquired via the sound collecting unit 2, and outputs the adjusted hitting sound (sound pressure signal) to the loudspeaker unit 4. The voice enhancement processing is performed by, for example, converting the hit sound into a digital signal, performing amplification processing, performing digital filter processing on the amplified hit sound (digital signal), and performing noise or environmental sound ( The sound (digital signal) from which the reverberation sound in the tunnel, the sound of the traveling vehicle, etc.) is removed is converted again into a sound pressure signal.

The loudspeaker 4 outputs, for example, a hitting sound (sound pressure signal) that has been subjected to the voice enhancement process output from the adjustment unit 3. The loudspeaker 4 may be headphones or earphones.
The processing unit 5 may be, for example, a circuit using a CPU (Central Processing Unit), a multi-core CPU, and a programmable device (FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device), etc.). In addition, the processing unit 5 reads out and executes a program that supports control of each unit of the test support apparatus 1 and a hammering test from a storage unit provided inside or outside.

  The display unit 6 displays, for example, an indicator such as an LED (Light Emitting Diode), an image display device, or the like that indicates a result (sound or deformed determination result) determined by the processing unit 5. For example, it is conceivable to turn on green indicating healthy when it is healthy, and light red indicating abnormal when it is abnormal.

In addition, the presentation part 7 (dashed line range) is a general term for an output device that presents a determination result to the user, and in this example, indicates the loudspeaker part 4, the display part 6, and the like.
FIG. 2 is a diagram illustrating an example of a processing unit of the inspection support apparatus.

  The filter unit 201 acquires a sound pressure signal (digital signal) obtained by digitally converting the sound pressure signal (analog signal) acquired via the sound collecting unit 2, performs digital filter processing on the sound pressure signal, and calculates The unit 202 extracts a sound pressure signal in a necessary band and outputs the extracted sound pressure signal (digital signal). A necessary band may be a voice band. Although detailed description is omitted, the filter unit 201 adjusts the level of the sound pressure signal to a level at which the digital pressure processing of the sound pressure signal and the process of obtaining the value calculated by the calculation unit 202 can be performed.

The calculation unit 202 obtains the maximum sound pressure value P0 in the sound pressure signal (digital signal) generated from the hitting sound output from the filter unit 201.
Subsequently, the calculation unit 202 calculates the first value S based on the maximum sound pressure value P0 and the predetermined time X. The first value S is, for example, a value (area) obtained by multiplying the maximum sound pressure value P0 and the predetermined time X. A value (area) obtained by multiplying the maximum sound pressure value P0 and the time indicated by time t0 to time t2 shown in FIGS. Good.

  In addition, the calculation unit 202 calculates the second value Si based on each of the acquired sound pressure values during a period from when the maximum sound pressure value P0 is acquired until the predetermined time X elapses. As the second value Si, for example, the area of the region surrounded by the waveform of the positive side region of the sound pressure waveform acquired during the period (the area within the oblique line of the sound pressure waveform A2 in FIG. 5) may be used. Alternatively, the area of the region surrounded by the waveform of the positive / negative side region of the sound pressure waveform acquired during the period (the area within the hatched area and the shaded area in FIG. 6) may be the second value Si. In FIG. 6, the second value Si is obtained after full-wave rectification processing of the sound pressure waveform A2, but the area of the positive / negative side region may be obtained without using full-wave rectification processing.

  In addition, the second value Si is obtained, for example, by using the maximum value of each period of the sound pressure waveform acquired during the period, the outer shape of the sound pressure waveform (A3 in FIG. 7, A4 in FIG. 8, etc.) It is a value obtained by integrating the outer shape (the area of the outer shape: within the dotted areas in FIGS. 7 and 8). However, the area of the outer shape is not limited to integration, and may be obtained by integration. For example, it is conceivable to perform integration using the level of the sampled sound pressure signal.

  Further, when the maximum sound pressure value P0 and the time indicated by the time t0 to the time t2 shown in FIGS. 5 to 8 are set as the predetermined time X, the second value Si (the time t1 to the time t2 described above) is used. The area related to the sound pressure waveform A2 from the time t0 to the time t1 may be added to the area, and the area may be set to the second value Si.

Note that either the first value S or the second value Si may be calculated first.
Subsequently, the calculation unit 202 calculates an evaluation value using the first value S, the second value Si, and the maximum sound pressure value P0. For example, the evaluation value is calculated by multiplying the ratio (Si / S) between the second value Si and the first value S by the maximum sound pressure value P0.

The determination unit 203 determines that the structure is deformed when the evaluation value is equal to or greater than the threshold Th.
The threshold value Th is a predetermined value for determining whether it is sound or deformed, and is determined by experiments and simulations and stored in the storage unit. For example, an evaluation value is obtained by performing experiments and simulations on a plurality of structures, and a standard deviation is obtained based on each of the obtained evaluation values. Then, 1σ (one sigma) or 2σ (two sigma) is obtained and set as the threshold Th.

  When the level of the sound pressure signal is adjusted to a level at which the above-described sound pressure signal can be calculated by the digital filter processing and the calculation unit 202, the threshold Th is adjusted according to the adjustment. That is, when the level of the sound pressure signal is adjusted high, the threshold Th is also increased according to the adjustment, and when the level of the sound pressure signal is adjusted low, the threshold Th is also decreased according to the adjustment. To do. The reason is that, since the evaluation value is calculated after calculating the second value Si and the first value S based on the sound pressure signal at the predetermined time X, the level of the sound pressure signal is set as the evaluation value. Since the adjusted influence is reflected, the threshold value Th is adjusted in order to suppress this influence in the determination. For example, adjustment information (table or the like) in which a threshold value is associated with each adjustment value (amplification degree or the like) used to adjust the level of the sound pressure signal as a reference is created and stored in the storage unit. When the threshold value is changed, a threshold value is selected with reference to the adjustment information, and adjustment using the selected threshold value as the threshold value Th can be considered. The threshold value Th may be obtained by calculation using the adjustment value without using the adjustment information.

However, the method for obtaining the threshold Th is not limited to the above method.
The presentation processing unit 204 generates presentation information (such as display information and voice information) for causing the loudspeaker unit 4 and the display unit 6 to perform voice and display. When notifying that the user is deformed by display via the display unit 6, the information is output to the display unit 6 using presentation information (display signal) related to the display. Although not shown in FIG. 1, when notifying the user of the abnormality through the sound amplifying unit 4, the sound amplifying unit 4 is used by using presentation information (sound signal) related to the sound. Output to.

I will explain the blow.
Examples of instruments used for determining the presence or absence of deformation such as floating of a portion to be inspected in a structure such as concrete and a cavity include a hammer and a rotary continuous sounding instrument. A rotary continuous hammering device is a tool in which a polygonal shaft sphere continuously strikes and strikes the surface of a structure, and determines the presence or absence of deformation according to the state of the hammering sound (sounding sound).

  FIG. 3 is a diagram illustrating an example of a structure hitting method. The hexagonal rotary continuous sounding instrument shown in FIG. 3 has a structure in which one side is L1, and the interval from the first stroke to the second stroke shown in FIG. 3 varies depending on the rotational speed (movement speed), but is continuously constant. Can make a blow.

  It is known that if the inspection target portion of the structure is in a healthy state, the vibration and sound pressure value of the sound pressure waveform generated when hitting are smaller than in a state where there is a deformation. That is, if it is in a healthy state, for example, a waveform (a waveform indicating that it is healthy) as shown in A of FIG. 4 is obtained. FIG. 4 is a diagram for explaining soundness and deformation. If there is a state of deformation, vibration occurs between the inside of the deformation and the surface of the structure, and the sound pressure value increases due to the reverberant sound, resulting in a large waveform amplitude and reverberant sound. That is, if there is a state of deformation, for example, a waveform as shown in FIG.

In addition, in the inspection using the instrument, the difference in the sound of hearing between a healthy place and a place having deformation can be clearly confirmed in a quiet environment or in the vicinity of about 1 m to 2 m.
Further, in the case of concrete, the above-described predetermined time X is a case where there is a deformation while the sound sound pressure waveform decay time is 5 ms to 15 ms, for example, and the frequency band is 5 kHz to 8 kHz, for example. The decay time of the sound pressure waveform is, for example, 10 ms to 20 ms, and the frequency band is, for example, 1 kHz to 5 kHz.

  In the example of FIG. 4, the sound pressure waveform decay time is 8.0 ms and the frequency is 5.1 kHz, and the sound pressure waveform decay time is 10.3 ms and the frequency is 2.0 kHz when there is a deformation. . The sound pressure waveform when there is a deformation varies depending on the deformation scale (depth, area), the maximum sound pressure value P0 is large, and it is amplified by the reverberation sound inside the deformation. Tend to be longer.

The calculation of the evaluation value will be described.
5 to 8 are diagrams for explaining the calculation of the evaluation value.
(A) A case where the evaluation value is obtained by Expression 1 will be described.

H1 = Si / S × P0 / P10 Formula 1
H1: Evaluation value S: First value Si: Second value P0: Maximum sound pressure value P10: Maximum value of sound pressure waveform immediately before the period elapses The calculation unit 202 calculates the maximum sound pressure value P0 and the predetermined time X. Is multiplied (P0 × X) to calculate a first value S (corresponding to the area within the broken line A1 in FIGS. 5 to 8). The maximum sound pressure value P0 is P01 and P02 in FIG. 4 and P0 in FIGS. The predetermined time X is determined by experiment or simulation. The first value S may be a value (area) obtained by multiplying the maximum sound pressure value P0 by the predetermined time X by the time indicated by the time t0 to the time t2 shown in FIGS. Good.

Subsequently, the calculation unit 202 calculates an area using the sound pressure waveform A2 to obtain a second value Si.
(A) In the example of FIG. 5, the area within the oblique line of the sound pressure waveform A2 is calculated using integration or integration, and is set as the second value Si.
(B) In the example of FIG. 6, the area within the diagonal line and the dotted area of the sound pressure waveform A2 is calculated using integration or integration, and is set as the second value Si. However, after performing the full wave rectification process as shown in FIG. 6, the area (the area within the hatched area and the shaded area) may not be obtained, and may be obtained by another method.
(C) In the example of FIG. 7, a line A3 connecting the maximum values (black circles in FIG. 7) of the sound pressure values for each period of the sound pressure waveform A2 and a period (tm in FIG. 4, t1 to t2 in FIG. 7). The area of the region represented by (period) and the area (corresponding to the area within the dotted area in FIG. 7) is calculated using integration or integration, and is set as the second value Si.
(D) In the example of FIG. 8, a line A4 connecting the maximum values (black circles in FIG. 8) of the sound pressure values for each cycle of the waveform obtained by full-wave rectification of the sound pressure waveform A2, and a period (tm, 8 (period from t1 to t2) in FIG. 8 and the area of the region represented by (corresponding to the area in the shaded area in FIG. 8) is calculated using integration or integration, and is set as the second value Si.

  When the maximum sound pressure value P0 and the time indicated by time t0 to time t2 shown in FIGS. 5 to 8 are set as the predetermined time X, the second value Si described above (from time t1 to time t2). The area of the portion from time t0 to time t1 may be added to the second value Si.

Subsequently, the calculation unit 202 multiplies the value obtained by dividing the second value Si obtained by any one of (a) to (d) by the first value S by the maximum sound pressure value P0, and performs the multiplication. The calculated value is divided by the maximum value P10 (white circle in FIGS. 5 to 8) of the sound pressure waveform immediately before the passage of time or a predetermined sound pressure value P10s, and the value calculated by the division is evaluated value H1. And The maximum value P10 corresponds to P10 in FIGS. The predetermined sound pressure value P10s may be a value that can be regarded as near zero because the maximum value P10 is affected by noise. For example, P10s = 1 can be considered.
(B) A case where the evaluation value is obtained by Expression 2 will be described.

Equation 1 can be transformed into Equation 2.
H1 = Si / (X × P10) Formula 2
When calculating the evaluation value H1 using Equation 2, the calculation unit 202 uses the second value Si obtained by any one of (a) to (d) as the sound pressure waveform immediately before the period elapses. An area obtained by multiplying the maximum value P10 (white circle in FIG. 7) and the predetermined time X or a predetermined area (X × P10s) is divided, and a value calculated by the division is set as an evaluation value H1.
(C) A case where the evaluation value is obtained by Expression 3 will be described.

H2 = Si / S × P0 Formula 3
H2: Evaluation value Si: Second value P0: Maximum sound pressure value When calculating the evaluation value H2 using Equation 3, the calculation unit 202 obtains the first value obtained from any one of (a) to (d). The second value Si is divided by the first value S, the divided value is multiplied by the maximum sound pressure value P0, and a value calculated by the multiplication is set as an evaluation value H2.
(D) A case where the evaluation value is obtained by Expression 4 will be described.

Equation 3 can be transformed into Equation 4.
H2 = Si / X Formula 4
When calculating the evaluation value H2 using Equation 3, the calculation unit 202 calculates a value calculated by dividing the second value Si obtained by any one of (a) to (d) by the predetermined time X. The evaluation value is H2.

  In FIGS. 5A to 5D, FIGS. 5 and 7 show cases where evaluation values are obtained for the positive side region of the sound pressure waveform A2, and FIGS. 6 and 8 show evaluation values for the positive and negative regions of the sound pressure waveform A2. It is a case to ask. By calculating the area as shown in FIG. 6 and FIG. 8, a more accurate area is obtained than calculating the area for each period of the sound pressure waveform A2 as shown in FIG. 5 and FIG. The determination accuracy can be improved.

  In addition, the first value S may be the same value by indicating the same maximum sound pressure value P0 regardless of whether it is sound or deformed. However, if sound is healthy, the amplitude of the sound pressure waveform is deformed. Since it becomes smaller than the amplitude of the sound pressure waveform in the case, there is a difference in the evaluation value between sound and deformed. Furthermore, in Formula 1 to Formula 4, the maximum sound pressure value P0 is multiplied and weighting is performed for one cycle, so that the difference between sound and deformed can be made clearer.

  In the example (c) of FIG. 7, the sound pressure value from the minimum sound pressure value to the maximum sound pressure value P0 (= maximum sound pressure value P0−minimum sound pressure value) is multiplied by a predetermined period X. The first value S may be used to obtain a connecting line between the positive side and the negative side, and the area determined by the connecting line and the predetermined period X may be used as the second value Si to obtain the evaluation value.

The operation of the inspection support apparatus will be described.
FIG. 9 is a flowchart showing an example of the operation of the examination support apparatus. In step S1, the processing unit 5 (filter unit 201) acquires a sound pressure signal.

  In step S2, the processing unit 5 (calculation unit 202) obtains the maximum sound pressure value P0. The sound pressure signal processed by the filter unit 201 is acquired, and the maximum sound pressure value P0 of the sound pressure signal after hitting is obtained. For example, when a sound pressure value exceeding a set threshold value (trigger level) is detected, it is determined that an impact has been made, and the maximum sound pressure value thereafter is set as the maximum sound pressure value P0. However, the method of determining the maximum sound pressure value P0 is not limited to the above method.

  In addition, it is assumed that the sound pressure signal exceeds a set threshold value even though the player is not hitting due to the influence of noise or white noise due to the surrounding environment. Therefore, in order to improve the accuracy of capturing the sound pressure signal generated by the impact, a method of preparing a plurality of thresholds in advance so that an optimum threshold can be set, a method of continuously changing the threshold, etc. Can be considered.

  In step S3, the processing unit 5 (calculation unit 202) calculates the first value S. In step S4, the processing unit 5 (calculation unit 202) calculates the second value Si. Either order of step S3 or step S4 may be processed first. In step S5, the processing unit 5 (calculation unit 202) calculates an evaluation value. For example, the evaluation value is calculated by multiplying the ratio (Si / S) between the second value Si and the first value S by the maximum sound pressure value P0. Alternatively, the evaluation value is calculated according to any one of Equations 1 to 4.

  In step S6, the processing unit 5 (determination unit 203) determines whether or not the threshold value Th is equal to or greater than the threshold value Th. If the threshold value Th is equal to or greater than the threshold value Th (Yes), the process proceeds to step S7 because there is a change, and is smaller than the threshold value Th. If it is a value (No), it is considered healthy and the process proceeds to step S8.

  In step S7, the processing unit 5 (presentation processing unit 204) performs a deformation process. In the deformation process, for example, presentation information (voice signal or display signal) for causing the presentation unit 7 such as the loudspeaker unit 4 or the display unit 6 to output the voice or display indicating the transformation is generated.

  In step S8, the processing unit 5 (presentation processing unit 204) performs sound processing. In the sound process, for example, presentation information (voice signal or display signal) for outputting sound or display indicating sound to the presentation unit 7 such as the loudspeaker 4 or the display unit 6 is generated.

The deformation process will be described.
FIG. 10 is a diagram for explaining the process of notifying the deformation. In the figure shown in FIG. 10, a rotary continuous sounding instrument is used to notify a user of a case where it is evaluated as deformed one or more times continuously. In this example, the case where the deformation is evaluated three times in succession is targeted, the first shot is sound, the second to fourth is deformed, the fifth is sound, the sixth is ninth The eyes are deformed. Accordingly, the second to fourth shots and the sixth to ninth shots are deformed three times in succession, so the deformation is displayed. The period of the deformed display shown in FIG. 10 is 50 ms, but is not limited, and it is desirable to determine the period in consideration of the structure of a rotary continuous sounding instrument. The reason why the deformation is displayed when it is continued for a plurality of times is that an abnormal sound is generated due to the first contact sound, a step on the concrete surface or the like.

  In the above description, the deformation display is performed when the deformation is continuously performed three times. However, the evaluation result for each stroke may be displayed in a deformed manner. Moreover, it is not necessary to use a rotary continuous sounding instrument, and a hammer or the like may be used. When a hammer is used, the deformation display may be performed by evaluating whether the hammer is healthy or deformed with a single blow.

According to the embodiment, it is possible to assist the user in improving the determination accuracy of the hammering test. In addition, a real-time percussion inspection can be performed in which the user recognizes the percussion sound.
Furthermore, the user can have a physique that can be carried. That is, when performing the analysis of the hitting sound and the process of determining the deformation of the structure, hardware having high processing capabilities such as the processes (1) to (4) and the frequency analysis process are not required. Therefore, the physique of the device can be reduced. In addition, the user can carry the apparatus by reducing the physique.

Furthermore, unlike the case of using a large impact sound inspection device, it is possible to inspect the details with certainty, leading to prevention of third party damage.
If the location or inspection location of the structure is different as in a conventional sound inspection device, the calibration operation is performed by the user, but even if the location or inspection location of the structure is different, the sound pressure signal and Since the threshold value can be adjusted, the user does not have to perform the calibration operation.

  FIG. 11 is a diagram illustrating an example of hardware of the inspection support apparatus. The hardware of the inspection support apparatus 900 (corresponding to 1 in FIG. 1) includes a processing unit 901 (corresponding to 5 in FIG. 1), a storage unit 902, a recording medium reading device 903, and an input / output interface 904 (input / output). I / F: equivalent to 7 in FIG. 1), a communication interface 905 (communication I / F), and the like. Further, each of the above components is connected by a bus 906.

The processing unit 901 may be a CPU, a multi-core CPU, or a programmable device.
The storage unit 902 may be a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a hard disk, or the like. Data such as parameter values and variable values may be recorded in the storage unit 902, or may be used as a work area at the time of execution.

  The recording medium reading device 903 controls reading / writing of data with respect to the recording medium 907 according to the processing of the processing unit 901. Then, the data written by the control of the recording medium reading device 903 is recorded on the recording medium 907 or the data recorded on the recording medium 907 is read. The detachable recording medium 907 includes a computer-readable non-transitory recording medium such as a magnetic recording device, an optical disk, a magneto-optical recording medium, and a semiconductor memory. The magnetic recording device includes a hard disk device (HDD). Optical disks include DVD (Digital Versatile Disc), DVD-RAM, CD-ROM (Compact Disc Read Only Memory), CD-R (Recordable) / RW (ReWritable), and the like. Magneto-optical recording media include MO (Magneto-Optical disk). Note that the storage unit 902 is also included in a non-transitory recording medium.

  An input / output unit 908 is connected to the input / output interface 904, receives information input from the input / output unit 908, and transmits the information to the processing unit 901 via the bus 906. Further, operation information and the like are displayed on the display screen in accordance with an instruction from the processing unit 901. As an input device of the input / output unit 908, for example, a touch panel, a keyboard, a pointing device (such as a mouse), and the like can be considered.

Note that a display that is an output unit of the input / output unit 908 may be a liquid crystal display, for example.
The communication interface 905 is an interface for performing LAN (Local Area Network) connection or Internet connection. In addition, the communication interface 905 may be used as an interface for performing LAN connection, Internet connection, or wireless connection with another computer as necessary.

  By using a computer having such a hardware configuration, various processing functions performed by the inspection support apparatus 900 (1) are realized. In that case, a program describing the processing contents of the functions that the examination support apparatus 900 (1) should have is provided. By executing the program on a computer, the above processing functions are realized on the computer. The program describing the processing contents can be recorded in a computer-readable recording medium 907.

  When distributing the program, for example, a recording medium 907 such as a DVD or a CD-ROM in which the program is recorded is sold. It is also possible to record the program in a storage device of the server computer and transfer the program from the server computer to another computer via a network.

  The computer that executes the program stores, for example, the program recorded in the recording medium 907 or the program transferred from the server computer in its storage unit 902. Then, the computer reads the program from its own storage unit 902 and executes processing according to the program. The computer can also read the program directly from the recording medium 907 and execute processing according to the program. Further, each time the program is transferred from the server computer, the computer can sequentially execute processing according to the received program.

FIG. 12 is a diagram illustrating an example of an inspection support system.
The test support apparatus 1001 (1) shown in FIG. 12 calculates the first calculated based on the maximum sound pressure value P0 of the hitting sound and the predetermined time X acquired via the sound collection unit 1002 (corresponding to 2 in FIG. 1). , The second value Si calculated based on each of the sound pressure values acquired during the period from the time when the maximum sound pressure value P0 was acquired until the predetermined time X has elapsed, the maximum sound pressure value P0, Is used to calculate an evaluation value. For example, the evaluation value is calculated by multiplying the ratio (Si / S) between the second value Si and the first value S by the maximum sound pressure value P0. When the evaluation value is equal to or greater than the threshold value Th, it is determined that the structure is deformed, information indicating that the structure is deformed is displayed, or information to be presented to the user by voice is generated, and a presentation unit (display unit) 1004 and the loudspeaker 1005).

  As the sound collecting unit 1002 shown in FIG. 12, for example, a narrow directional microphone can be considered. The sound collecting unit 1002 can be fixed to the helmet 1006 using the suspension 1003 and is attached so as not to impair the function of the helmet 1006.

  A loudspeaker 1005 shown in FIG. 12 outputs a sound that is adjusted by performing a voice enhancement process on the sound obtained via the sound collector 1002. The loudspeaker 1005 is preferably, for example, a headphone or an earphone that can be fixed inside the helmet 1006 without impairing the function of the helmet 1006 and can secure a position where it hits the user's ear.

The inspection support apparatus 1001 can be put in a dedicated case and attached to the user's belt 1007.
According to the embodiment, by using the inspection support system, it is possible to support improving the determination accuracy of the hammering inspection by the user. In addition, a real-time percussion inspection can be performed in which the user recognizes the percussion sound.

  Furthermore, since the user can have a physique that can be carried, the processes (1) to (4) and the frequency analysis can be performed when the analysis of the hitting sound and the process of determining the deformation of the structure are executed. Since hardware with high processing capability such as processing is not required, the size of the apparatus can be reduced. In addition, the user can carry the apparatus by reducing the physique.

Furthermore, unlike the case of using a large impact sound inspection device, it is possible to inspect the details with certainty, leading to prevention of third party damage.
If the location or inspection location of the structure is different as in a conventional sound inspection device, the calibration operation is performed by the user, but even if the location or inspection location of the structure is different, the sound pressure signal and Since the threshold value can be adjusted, the user does not have to perform the calibration operation.

  The present invention is not limited to the embodiments, and various improvements and changes can be made without departing from the scope of the present invention.

1, 900, 1001 Inspection support device,
2, 1002 Sound collection part,
3 Adjustment section,
4, 1005 Loudspeaker,
5, 901 processing unit,
6, 1004 display section,
201 filter section,
202 calculation unit,
203 determination unit,
204 presentation processing unit,
902 storage unit,
903 recording medium reader;
904 I / O interface,
905 communication interface,
906 bus,
907 recording medium,
908 input / output unit,
1003 suspension,
1006 helmet,
1007 belt,

Claims (12)

The predetermined time elapses from the maximum sound pressure value in the sound of the obtained structure, the first value calculated based on the maximum sound pressure value and the predetermined time, and the time when the maximum sound pressure value is acquired. A second value calculated based on each of the sound pressure values acquired in the period until, and multiplying the ratio of the second value and the first value by the maximum sound pressure value, A calculation unit for calculating an evaluation value;
When the evaluation value is greater than or equal to a threshold value, a determination unit that determines that the structure is deformed;
An inspection support apparatus comprising: The inspection support apparatus according to claim 1,
The calculation unit includes:
Multiplying the maximum sound pressure value and the predetermined time to calculate the first value,
The area represented by the line connecting the maximum values of the sound pressure values for each period of the sound pressure waveform formed by the sound pressure values and the period is calculated using integration or integration. The second value,
The value obtained by dividing the second value by the first value is multiplied by the maximum sound pressure value, and the multiplied value is multiplied by the maximum value of the sound pressure waveform immediately before the period or a predetermined value. Dividing by the sound pressure value, the value calculated by the division is the evaluation value,
An inspection support apparatus characterized by that. The inspection support apparatus according to claim 1,
The calculation unit includes:
The area of the region represented by the line connecting the maximum values of the sound pressure values for each period of the sound pressure waveform formed by the sound pressure values and the period is calculated using integration or integration,
The calculated area is divided by an area obtained by multiplying the predetermined value by the maximum value of the sound pressure waveform immediately before passing the period, or a predetermined area, and the value calculated by the division is the evaluation value. And
An inspection support apparatus characterized by that. The inspection support apparatus according to claim 1,
The calculation unit includes:
Multiplying the maximum sound pressure value and the predetermined time to calculate the first value,
The area represented by the line connecting the maximum values of the sound pressure values for each period of the sound pressure waveform formed by the sound pressure values and the period is calculated using integration or integration. The second value,
Dividing the second value by the first value, multiplying the divided value by the maximum sound pressure value, and calculating the value as the evaluation value,
An inspection support apparatus characterized by that. The inspection support apparatus according to claim 1,
The calculation unit includes:
The area of the region represented by the line connecting the maximum values of the sound pressure values for each period of the sound pressure waveform formed by the sound pressure values and the period is calculated using integration or integration, A value calculated by dividing the calculated area by the predetermined time is an evaluation value.
An inspection support apparatus characterized by that. The inspection support apparatus according to any one of claims 1 to 5,
The threshold value, when the level of the sound pressure signal is adjusted, changes the threshold value Th according to the adjustment.
An inspection support apparatus characterized by that. The inspection support apparatus according to any one of claims 2 to 5 ,
The calculation unit includes:
The sound pressure waveform is used after half-wave rectification processing or full-wave rectification processing,
An inspection support apparatus characterized by that. The inspection support apparatus according to any one of claims 1 to 7,
When the structure has a deformation, the structure has a display processing unit that generates information to be displayed or presented to the user by voice, and outputs the information to the presentation unit.
An inspection support apparatus characterized by that. An inspection support method for supporting a hammering inspection of a structure,
Inspection support device
The predetermined time elapses from the time when the maximum sound pressure value in the sound of the acquired structure, the first value calculated based on the maximum sound pressure value and the predetermined time, and the time when the maximum sound pressure value is acquired. A second value calculated based on each acquired sound pressure value during the period until,
An evaluation value is calculated by multiplying the ratio between the second value and the first value by the maximum sound pressure value,
When the evaluation value is greater than or equal to a threshold value, it is determined that the structure is deformed.
An inspection support method characterized by that. The predetermined time elapses from the time when the maximum sound pressure value in the sound of the acquired structure, the first value calculated based on the maximum sound pressure value and the predetermined time, and the time when the maximum sound pressure value is acquired. A second value calculated based on each acquired sound pressure value during the period until,
An evaluation value is calculated by multiplying the ratio between the second value and the first value by the maximum sound pressure value,
When the evaluation value is greater than or equal to a threshold value, it is determined that the structure is deformed.
Inspection support program characterized by that. An inspection support system that can be worn by a user,
A sound collection part for collecting the sound of the structure;
The maximum sound pressure value of the hitting sound acquired via the sound collection unit, the first value calculated based on the maximum sound pressure value and a predetermined time, and the predetermined sound time from the time when the maximum sound pressure value is acquired. A second value calculated based on each of the sound pressure values acquired during a period until the time elapses, and the maximum sound pressure value is calculated as a ratio between the second value and the first value. An evaluation value is calculated by multiplication, and if the evaluation value is equal to or greater than a threshold value, it is determined that the structure is deformed, and the presence of the deformation is displayed or presented to the user by voice. An inspection support apparatus that generates information to be output and outputs the information to the presentation unit;
A loudspeaker that outputs a sound that is adjusted by performing a voice enhancement process on the sound obtained through the sound collection unit, and
An inspection support system comprising: The inspection support system according to claim 11,
The helmet that the user wears includes the sound collection unit, the sound amplification unit, and a presentation unit that informs the user by display or voice,
Inspection support system characterized by that.