JP7078931B2 - Exterior wall tile diagnostic equipment and method - Google Patents

Description

The present invention relates to an outer wall tile diagnostic device and a method for diagnosing a peeled portion and a degree of peeling of an outer wall tile of a building.

Conventionally, the diagnosis of the outer wall tile is generally carried out by an inspector hitting the wall surface with a test hammer. However, for this diagnosis, it is necessary to install scaffolding around the outer wall of the building or use a gondola or the like, which requires a long period of time for the diagnosis and is expensive.

Therefore, various means for diagnosing without using a scaffold, a gondola, or the like using a test hammer as in the conventional case have been proposed (for example, Patent Documents 1 and 2).
Further, a means of using a sound wave without using a test hammer has also been proposed (for example, Patent Document 3).

The "building wall surface diagnosis robot" of Patent Document 1 includes a vertical movement mechanism, a lateral movement mechanism, and a front-back movement mechanism. The back-and-forth movement mechanism is equipped with a hammer with a striking hammer, a vibration sensor, and a detection head with a microphone. The detection head sends operation control data and detection data to a computer, and the computer diagnoses the wall surface of the building.

The "structure inspection system" of Patent Document 2 includes a scraped portion that scrapes the outer wall surface of a building, a multi-rotor helicopter that moves the scraped portion so that the scraped portion does not separate from the outer wall surface, and a scraping sound collecting section. .. The scraping sound collecting unit collects the scraping sound generated when the scraping portion scrapes the outer wall surface, and the scraping sound is analyzed by the supercomputer to determine the abnormal area on the outer wall surface.

In the "detection method using sound waves" of Patent Document 3, the surface of an irradiated object containing an object to be detected is irradiated with sound waves, and the vibration velocity is measured at a plurality of measurement points on the surface to measure the object to be detected. Determine the position of. The object to be detected is, for example, a defect inside a concrete structure.

Japanese Patent Application Laid-Open No. 2003-14711 JP-A-2017-227554 JP-A-2015-224891

Since the "building wall surface diagnosis robot" of Patent Document 1 can only move in a plane, it cannot be applied to the outer wall diagnosis of a building having protrusions or openings such as balconies and sashes.

In the "structure inspection system" of Patent Document 2, since the scraping sound collecting unit collects the driving sound of the multi-rotor helicopter in addition to the scraping sound, the driving sound of the multi-rotor helicopter becomes noise and the S / N ratio is lowered. , The diagnostic accuracy is low.

Further, in the "detection method using sound waves" of Patent Document 3, for example, the vibration velocity is measured at a plurality of measurement points on the surface of the building to determine the position of the object to be detected. Therefore, for example, the position of a defective portion (crack or foreign matter) inside the concrete structure can be determined, but the degree of peeling (degree of peeling) of each outer wall tile cannot be diagnosed.

The present invention has been devised to solve the above-mentioned problems. That is, an object of the present invention is an outer wall tile capable of diagnosing the peeled portion and the degree of peeling of the outer wall tile with high accuracy even in a building having protrusions or openings such as a balcony or a sash without using a scaffold or a gondola. To provide diagnostic equipment and methods.

According to the present invention, the outer wall tile diagnostic apparatus for diagnosing the peeled portion and the degree of peeling of the outer wall tile of a building.
A flying object that flies along the outer surface of the building, oscillates sound waves toward the outer wall tile during flight, and at the same time detects the diagnostic position of the outer wall tile and the vibration frequency at that position.
A remote control device that remotely controls the flying object,
A diagnostic device for diagnosing the degree of peeling of the outer wall tile from the vibration frequency is provided .
The sound source of the sound wave is provided with an outer wall tile diagnostic device, which is a flight sound of the flying object flying .

Further, according to the present invention, there is an outer wall tile diagnostic method for diagnosing the peeled portion and the peeling degree of the outer wall tile by using the outer wall tile diagnostic device.
The projectile is remotely controlled to fly along the outer surface of the building.
During the flight, sound waves are oscillated toward the outer wall tile, and at the same time, the diagnostic position of the outer wall tile and the vibration frequency are detected.
An outer wall tile diagnostic method for diagnosing the degree of peeling of the outer wall tile from the vibration frequency is provided.

According to the apparatus and method of the present invention, the projectile is remotely controlled to fly along the outer surface of the building, and during the flight, sound waves are oscillated toward the outer wall tile, and at the same time, the diagnostic position of the outer wall tile and its position. Detects the vibration frequency of.
In addition, the diagnostic device diagnoses the degree of peeling of the outer wall tile from the detected vibration frequency.

By using a remote-controlled projectile (for example, a drone), it is possible to diagnose exterior wall tiles even in a building with protrusions or openings such as balconies and sashes without using scaffolding or gondola.
Moreover, since the peeled portion and its vibration frequency are detected at the same time, the diagnostic position of the outer wall tile can be accurately detected.
Further, since the degree of peeling of the outer wall tile is diagnosed from the vibration frequency of the diagnosis position, the oscillated sound wave does not become noise, the decrease in the S / N ratio is prevented, and the diagnosis can be made with high accuracy.

It is an embodiment diagram of the outer wall tile diagnostic apparatus according to the present invention. It is an overall flow diagram of the outer wall tile diagnosis method by this invention. It is an experimental result in a test room when the motor sound of a drone is used as a sound wave. It is an experimental result in a test room when a sound source of 1 kHz was used as a sound wave.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same reference numerals are given to the common parts in each figure, and duplicate description is omitted.

FIG. 1 is an embodiment diagram of an outer wall tile diagnostic device 100 according to the present invention.
In this figure, the outer wall tile diagnostic device 100 is a device for diagnosing a peeled portion and a peeling degree Q of the outer wall tile 2 of the building 1, and includes a flying object 10, a remote control device 20, and a diagnostic device 30.

The “degree of peeling Q of the outer wall tile 2” can be determined from the vibration frequency F (for example, the resonance frequency) of the outer wall tile 2.

The peeling of the outer wall tile 2 occurs at the boundary between the frame of the building 1 and the attached mortar, or at the boundary between the attached mortar and the outer wall tile 2. The vibration frequency F of the peeling tile changes depending on the peeling depth at which the float is generated. For example, since the normal outer wall tile 2 is firmly fixed to the building 1, the vibration frequency F (resonance frequency) at that position is high. On the other hand, since the peeled outer wall tile 2 is partially separated from the building 1, it approaches the vibration frequency F (resonance frequency) of the tile alone, so that the vibration frequency F at that position is higher than that of the normal outer wall tile 2. It gets lower.
For example, it is assumed that the degree of peeling Q is represented by a value of 0 to 10, for example, the smaller the value is, the more normal it is, and the larger the value is, the larger the degree of peeling is. In this case, when the vibration frequency F of the outer wall tile 2 is a normal value, the degree of peeling Q is 0, and when the vibration frequency F is the frequency when the vibration frequency F is completely peeled off, the degree of peeling Q is 10 and the middle is 0. And 10 are intermediate values.

In this example, the projectile 10 is an unmanned multicopter, such as a drone, that has a plurality of rotors, can be remotely controlled, and can fly stationary in the air.

The projectile 10 flies along the outer surface of the building 1, oscillates a sound wave 3 toward the outer wall tile 2 during the flight, and at the same time detects the diagnostic position P of the outer wall tile 2 and the vibration frequency F at that position. ..
It is preferable that this flight be close to the outer surface of the building 1 and maintain a substantially constant distance from the outer surface. Further, it is preferable that this flight is almost stationary in the same attitude in the air and moves at a low speed along the outer surface of the building 1.

In FIG. 1, the flying object 10 has a laser device 12 and a position detecting device 14.

The laser device 12 has an irradiation means and a light receiving means of the laser light 4, irradiates the laser light 4 toward the outer wall tile 2, receives the reflected light 5, and obtains the vibration frequency F of the diagnosis position P from the reflected light 5. To detect. In this figure, the number of laser beams 4 is one, but there may be a plurality of laser beams 4. Further, the diagnosis position P is preferably one or a plurality of points of the same outer wall tile 2.

The position detecting device 14 is, for example, a camera, and detects the diagnostic position P of the outer wall tile 2 irradiated with the laser beam 4. For example, it is preferable that the laser beam 4 irradiates a specific position (for example, the center) of the image taken by the camera. Further, the laser light 4 is visible light, and it is preferable that the irradiation position of the laser light 4 can be specified from the image taken by the camera.
The position detecting device 14 is not limited to the camera, and the diagnostic position P may be detected by a combination of the GPS and the laser device 12.

The sound source of the sound wave 3 is preferably the flight sound of the flying object 10.
The flight sound may be, for example, a drone motor sound, a drone rotor sound, or a rotor sound modified to generate a special sound.

The projectile 10 may have a sound source 16 that oscillates a variable frequency sound wave 3.
In this case, the frequency range of the sound wave 3 is preferably a range including the peeled outer wall tile 2 and the vibration frequency F of the normal outer wall tile 2 (for example, 0.5 to 4 kHz).
Further, the frequency of the sound wave 3 may be set to the vibration frequency F of the peeled outer wall tile 2. For example, the vibration frequency F of the outer wall tile 2 peeled off in the field can be specified, and the sound wave 3 having that frequency can be oscillated to efficiently investigate.
The sound pressure of the sound wave 3 is preferably such that the peeled outer wall tile 2 can be vibrated on the outer surface of the building 1, for example, 80 to 120 dB.

In FIG. 1, the flying object 10 further includes a transmitting device 18 that wirelessly transmits a diagnostic position P and a vibration frequency F.
The transmission device 18 includes a storage device that stores the diagnosis position P and the vibration frequency F as a pair, and transmits the pair of the diagnosis position P and the vibration frequency F at any time.
In addition, instead of the transmission device 18, only a storage device may be provided, and the degree of peeling Q may be diagnosed by the diagnostic device 30 by post-processing.

The remote control device 20 remotely controls the projectile 10. This remote control may be manual control by an inspector or autopilot by a preset program.

The diagnostic device 30 diagnoses the degree of peeling Q of the outer wall tile 2 from the vibration frequency F.
In this example, the diagnostic device 30 has a receiving device 32 that wirelessly receives the diagnostic position P and the vibration frequency F.
The receiving device 32 may be built in the remote control device 20. The receiving device 32 may be omitted, and the degree of peeling Q may be diagnosed by the diagnostic device 30 for the pair of the diagnostic position P and the vibration frequency F stored in the storage device of the flying object 10.

The diagnostic apparatus 30 has a frequency analyzer 34 that Fourier transforms the vibration frequency F and analyzes the frequency.
The diagnostic apparatus 30 compares the Fourier-transformed diagnostic frequency distribution map B corresponding to the diagnostic position P with the normal frequency distribution map A for the normal outer wall tile 2, and diagnoses the degree of peeling Q from the difference.

FIG. 2 is an overall flow chart of the outer wall tile diagnosis method according to the present invention.
In the outer wall tile diagnosis method according to the present invention, the peeled portion and the degree of peeling Q of the outer wall tile 2 are diagnosed by using the outer wall tile diagnostic device 100 described above.
In FIG. 2, the outer wall tile diagnosis method comprises each step (step) of S1 to S4.

In flight step S1, the projectile 10 is remotely controlled to fly along the outer surface of the building 1.
In the sound wave oscillation step S2, the sound wave 3 is oscillated toward the outer wall tile 2 during the flight of the projectile 10.
In the detection step S3, the diagnostic position P of the outer wall tile 2 and the vibration frequency F at that position are detected at the same time as the sound wave oscillation step S2.
In the diagnosis step S4, the degree of peeling Q of the outer wall tile 2 is diagnosed from the vibration frequency F.

FIG. 3 shows the experimental results in a test room when the motor sound of the drone is used as the sound wave 3.
In this figure, (A) is a normal frequency distribution map A for a normal outer wall tile 2, and (B) is a diagnostic frequency distribution map B for a peeled outer wall tile 2. In this example, the resonance frequency of the peeled outer wall tile 2 is 1 kHz.
In each figure, the horizontal axis shows the frequency (kHz) and the vertical axis shows the vibration level FFT (db).

From the difference between the diagnostic frequency distribution diagram B and the normal frequency distribution diagram A in FIGS. 3 (A) and 3 (B), in the diagnostic frequency distribution diagram B, the vibration level near 1 kHz, which is the resonance frequency of the outer wall tile 2, is large. You can see that it is. From this, it is possible to detect the degree of peeling Q corresponding to the “resonance frequency near 1 kHz”.

From this result, it was confirmed that, under certain conditions such as a large peeling area, the location where the peeling occurs can be diagnosed by the sound wave 3 using the motor sound or the rotor sound of the drone as a sound source.

FIG. 4 shows the experimental results in a test room when a 1 kHz sound source 16 is used as the sound wave 3.
In this figure, (A) is a normal frequency distribution map A, and (B) is a diagnostic frequency distribution map B. In this example, the resonance frequency of the peeled outer wall tile 2 is 1 kHz. Further, in each figure, the horizontal axis represents the frequency (kHz) and the vertical axis represents the vibration level FFT (db).

From the comparison between FIGS. 4 (A) and 4 (B), and from the difference between the diagnostic frequency distribution map B and the normal frequency distribution map A as in FIG. 3, in the diagnostic frequency distribution map B, the resonance of the outer wall tile 2 The vibration level near 1 kHz, which is the frequency, is large. From this, it is possible to detect the degree of peeling Q corresponding to the “resonance frequency near 1 kHz”.

Further, from this result, when the energy is small only by the motor sound of the drone and the peeled outer wall tile 2 does not vibrate sufficiently, a sound wave 3 close to the resonance frequency of the peeled outer wall tile 2 is applied from the sound source 16 by a speaker or the like ( It can be seen that it is preferable to oscillate).
The resonance frequency of the peeled outer wall tile 2 can be obtained by hitting the outer wall of the building 1 to be investigated with a hammer or the like and measuring the resonance frequency of the tile peeled portion.

According to the above-described embodiment of the present invention, the projectile 10 is remotely controlled to fly along the outer surface of the building 1, and during the flight, sound waves 3 are oscillated toward the outer wall tile 2 and at the same time, the outer wall tile 2 is used. The diagnostic position P and the vibration frequency F at that position are detected.
Further, the diagnostic device 30 diagnoses the degree of peeling Q of the outer wall tile 2 from the detected vibration frequency F.

By using a remote-controlled projectile 10 (for example, a drone), it is possible to diagnose the outer wall tile 2 even in a building 1 having protrusions or openings such as balconies and sashes without using scaffolding or a gondola. can.
Further, since the peeled portion and the vibration frequency F at that position are detected at the same time, the diagnostic position P of the outer wall tile 2 can be accurately detected.
Further, since the degree of peeling Q of the outer wall tile 2 is diagnosed from the vibration frequency F of the diagnosis position P, the oscillated sound wave 3 does not become noise, the decrease in the S / N ratio is prevented, and the diagnosis can be made with high accuracy.

It should be noted that the present invention is not limited to the above-described embodiment, and of course, various modifications can be made without departing from the gist of the present invention.

A normal frequency distribution map, B diagnostic frequency distribution map, F vibration frequency,
P Diagnosis position, Q Degree of peeling, 1 Building, 2 Exterior wall tiles, 3 Sound waves,
4 Laser light, 5 Reflected light, 10 Flying object (unmanned multicopter),
12 laser device, 14 position detection device (camera), 16 sound source,
18 transmitter, 20 remote control, 30 diagnostic, 32 receiver,
34 Frequency analyzer, 100 Exterior wall tile diagnostic device

Claims (7)

It is an outer wall tile diagnostic device that diagnoses the peeling point and the degree of peeling of the outer wall tile of the building.
A flying object that flies along the outer surface of the building, oscillates sound waves toward the outer wall tile during flight, and at the same time detects the diagnostic position of the outer wall tile and the vibration frequency at that position.
A remote control device that remotely controls the flying object,
A diagnostic device for diagnosing the degree of peeling of the outer wall tile from the vibration frequency is provided .
The sound source of the sound wave is an outer wall tile diagnostic device which is a flight sound of the flying object flying . The projectile includes a laser device that irradiates a laser beam toward the outer wall tile and detects the vibration frequency from the reflected light.
The outer wall tile diagnostic device according to claim 1, further comprising a position detecting device for detecting a diagnostic position of the outer wall tile. The projectile has a transmitter that wirelessly transmits the diagnostic position and the vibration frequency.
The outer wall tile diagnostic device according to claim 1, wherein the diagnostic device has a receiving device that wirelessly receives the diagnostic position and the vibration frequency. The outer wall tile diagnostic device according to claim 1, wherein the diagnostic device includes a frequency analyzer that Fourier transforms the vibration frequency to perform frequency analysis. The fourth aspect of claim 4 , wherein the diagnostic apparatus compares the Fourier-transformed diagnostic frequency distribution map corresponding to the diagnostic position with the normal frequency distribution map for the normal outer wall tile, and diagnoses the degree of peeling from the difference. Exterior wall tile diagnostic device. The outer wall tile diagnostic device according to claim 1, wherein the projectile has a plurality of rotary wings, can be remotely controlled, and is an unmanned multicopter capable of stationary flight in the air. An outer wall tile diagnostic method for diagnosing the peeled portion and the degree of peeling of the outer wall tile by using the outer wall tile diagnostic device according to claim 1.
The projectile is remotely controlled to fly along the outer surface of the building.
During the flight, the sound wave is oscillated toward the outer wall tile, and at the same time, the diagnostic position of the outer wall tile and the vibration frequency are detected.
An outer wall tile diagnosis method for diagnosing the degree of peeling of the outer wall tile from the vibration frequency.

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