Tile detachment detection device

Abstract

To enable determination of the presence or absence of separation of exterior wall tiles with stable or high accuracy regardless of the skill level of an inspector.SOLUTION: A tile separation determination device 10 is provided, comprising a percussion body 11 having a percussion portion 11a for performing percussion inspection of exterior wall tiles, a vibration sensor 12 provided on the percussion body 11, for detecting vibration caused by percussing of the exterior wall tiles with the percussion portion 11a, and a determination device 13 configured to determined the presence or absence of separation of exterior wall tiles on the basis of the vibration detected by the vibration sensor 12.SELECTED DRAWING: Figure 2A

Description

[Technical Field]

[0001] The present invention relates to a technique for determining whether outer wall tiles of a building (e.g., an apartment house) are peeled off. [Background Art]

[0002] A percussion inspection is known as an inspection for checking whether tiles forming an outer wall of a building (hereinafter simply referred to also as outer wall tiles) are peeled off. In the percussion inspection, an inspector percusses (e.g., rubs or strikes) each outer wall tile with a percussion rod, listens to the percussion sound generated at that time, and determines the presence or absence of peeling of the outer wall tile based on the difference in sound. The aforementioned percussion rod is described, for example, in Patent Document 1. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2021-148500 [Summary of the Invention] [Problems to be Solved by the Invention]

[0004] However, the determination accuracy in the aforementioned percussion inspection depends on the skill level of the inspector, such as skill and experience. For example, an inexperienced inspector may incorrectly determine that an actually peeled outer wall tile is not peeled in the aforementioned percussion inspection. In addition, there is a shortage of the number of inspectors skilled in percussion inspection.

[0005] Furthermore, when the base on which the outer wall tiles are attached is a lightweight base such as an ALC (Autoclaved Lightweight aerated Concrete) panel or an ECP (Extruded Cement Panel), or when the outer wall tiles are attached to the outer wall with an elastic adhesive, even if the outer wall tiles are not peeled, the sound generated when percussing the outer wall tiles becomes similar to the sound when the outer wall tiles are peeled. Therefore, there is a possibility that the accuracy of the determination of the presence or absence of peeling by the inspector is lowered.

[0006] Therefore, the object of the present invention is to solve at least some of the above-mentioned problems. In other words, the object of the present invention is to enable the determination of whether or not exterior wall tiles are peeling off with stable or high accuracy, regardless of the inspector's skill level. [Means for solving the problem]

[0007] The tile detachment determination device according to the present invention comprises a tapping body having a tapping section for tapping exterior wall tiles, a vibration sensor provided on the tapping body for detecting vibrations generated by tapping the exterior wall tiles with the tapping section, and a determination device for determining whether or not exterior wall tiles have detached based on the vibrations detected by the vibration sensor. [Effects of the Invention]

[0008] In the tile detachment detection device according to the present invention, vibrations generated by tapping the exterior wall tiles with the tapping part of the tapping body are detected by a vibration sensor attached to the tapping body, and the detection device determines whether or not the exterior wall tiles have detached based on the detected vibrations. Therefore, a stable or highly accurate determination result can be obtained regardless of the skill level of the inspector. Furthermore, since the tapping body used to inspect the exterior wall tiles is equipped with a vibration sensor, there is no need to install the vibration sensor at the inspection site. Therefore, the presence or absence of detachment of exterior wall tiles can be inspected efficiently. [Brief explanation of the drawing]

[0009] [Figure 1] This shows a tile peeling detection device according to an embodiment of the present invention. [Figure 2A] This shows a tile peeling detection device according to an embodiment of the present invention and the configuration of the detection device. [Figure 2B] This diagram shows the configuration in which a piezoelectric element, used as a vibration sensor, is mounted so as to extend in a long, slender manner along the central axis of a rod-shaped support. [Figure 3A-3E] The waveform data for exterior wall tiles that have not peeled off is shown. [Figure 4A-4E]The waveform data for the detached exterior wall tiles is shown. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described based on the drawings. Common parts in each figure are denoted by the same reference numerals, and redundant explanations are omitted.

[0011] Figure 1 shows a tile detachment detection device 10 according to an embodiment of the present invention. Figure 2A shows the configuration of the tile detachment detection device 10 and its detection device 13. The tile detachment detection device 10 comprises a tapping body 11, a vibration sensor 12, and a detection device 13.

[0012] The tapping body 11 has a tapping portion 11a for tapping the exterior wall tiles 2. The tapping portion 11a is made of a hard material for tapping the exterior wall tiles 2. This hard material may be a metal such as stainless steel or iron. The tapping body 11 has a support portion 11b on which the tapping portion 11a is provided. That is, the tapping portion 11a is supported by the support portion 11b. The tapping portion 11a may be fixed to the support portion 11b.

[0013] In this application, "to tap the exterior wall tiles 2" may mean rubbing the exterior wall tiles 2 with the tapping part 11a (for example, rubbing multiple exterior wall tiles 2 in succession), or it may mean striking the exterior wall tiles 2 with the tapping part 11a.

[0014] In this embodiment, the support portion 11b is rod-shaped, but it may have other shapes. In this embodiment, the tapping portion 11a is provided at the tip of the rod-shaped support portion 11b. In this case, the tapping portion 11a may have a spherical shape, an ellipsoidal shape, or a shape close to these, but is not limited to these shapes. The rod-shaped support portion 11b may be configured to be extendable and retractable.

[0015] The percussion body 11 may have a handle portion 11c provided on the root side portion of the rod-shaped support portion 11b. In this case, an inspector can operate the percussion body 11 by grasping the handle portion 11c by hand.

[0016] The vibration sensor 12 is provided on the percussion body 11. The vibration sensor 12 may be provided at the distal end portion of the support portion 11b. In this case, the vibration sensor 12 may be provided at a position adjacent to the percussion portion 11a from the root side of the support portion 11b. The vibration sensor 12 may be embedded inside the support portion 11b, or may be attached to the outer surface of the support portion 11b.

[0017] The vibration sensor 12 detects vibration generated by percussing the exterior wall tile 2 with the percussion portion 11a. The vibration sensor 12 may generate and output an electrical signal (for example, a voltage signal) corresponding to the vibration. The vibration sensor 12 may be, for example, a piezoelectric element, but is not limited thereto.

[0018] The piezoelectric element serving as the vibration sensor 12 may have a shape extending linearly or in a band shape. Such a linear or band-shaped piezoelectric element 12 may be attached to the support portion 11b in a state of being wound (for example, one turn) around the outer peripheral surface of the support portion 11b so as to extend in a direction around the central axis of the (for example, rod-shaped) support portion 11b as shown in FIG. 2A.

[0019] Alternatively, as shown in FIG. 2B, the linear or band-shaped piezoelectric element 12 may be provided on the rod-shaped support portion 11b so as to extend elongated along the central axis of the support portion 11b. In this case, the piezoelectric element 12 may be attached to the outer surface of the support portion 11b.

[0020] The vibration sensor 12 inputs the detected vibration (e.g., the aforementioned electrical signal) to the determination device 13. For example, as shown in FIG. 1, the vibration sensor 12 may input the detected vibration (the aforementioned electrical signal) to the determination device 13 through the signal line 14. The signal line 14 may have an extra length and be deformable so as to be able to follow the movement of the percussion body 11 by an inspector. Alternatively, the percussion body 11 may be provided with a transmission unit that wirelessly transmits and inputs the vibration detected by the vibration sensor 12 (the aforementioned electrical signal) to the determination device 13.

[0021] The determination device 13 generates waveform data representing temporal changes of the vibration based on the vibration detected by the vibration sensor 12 (the aforementioned electrical signal), and determines whether or not the outer wall tile 2 attached to the outer wall surface 1 of a building is peeled off from the outer wall surface 1 (hereinafter also simply referred to as presence or absence of peeling) based on the waveform data. Here, the presence or absence of peeling may mean whether or not the peeling of the outer wall tile 2 has progressed to a predetermined degree or more. For example, it may mean whether or not a portion of a predetermined proportion or more on the back surface of the outer wall tile 2 is peeled off from the outer wall surface 1. The predetermined proportion may be a predetermined proportion relative to the total area of the back surface of the outer wall tile 2.

[0022] The determination device 13 of the present embodiment includes a waveform data generation unit 13a, a spectrum acquisition unit 13b, an index value acquisition unit 13c, a determination unit 13d, and an output unit 13e.

[0023] The waveform data generation unit 13a generates waveform data representing temporal changes of the vibration based on the vibration detected by the vibration sensor 12 (the aforementioned electrical signal). This waveform data may be data representing the relationship between elapsed time and vibration displacement (for example, the data shown in FIGS. 3A to 4E described later). That is, the waveform data may be data representing the vibration displacement at each time point. Note that the vibration displacement may mean displacement in a positive direction or a negative direction from the center of vibration.

[0024] The spectrum acquisition unit 13b converts the waveform data generated by the waveform data generation unit 13a into spectral data representing the vibration intensity (frequency components) at each frequency. At this time, the spectrum acquisition unit 13b may be configured to convert the portion of the waveform data that represents vibration caused by percussion into spectral data. This portion may be, for example, the time range from the point in time when the magnitude (amplitude) of the vibration displacement begins to exceed a predetermined value until a predetermined time has elapsed (for example, a time range of 0.2 seconds or more and within 0.5 seconds), or it may be the time range in which an amplitude greater than the predetermined value occurs.

[0025] The index value acquisition unit 13c determines an index value regarding the presence or absence of peeling of the exterior wall tiles 2 based on the spectral data obtained by the spectral acquisition unit 13b.

[0026] For example, the index value may be the ratio of the vibration intensity at the second frequency to the vibration intensity (i.e., vibration component) at the first frequency. Here, the first frequency may be the frequency at which the vibration intensity tends not to increase even when peeling occurs in the exterior wall tiles 2, and the second frequency may be the frequency at which the vibration intensity tends to increase when peeling occurs in the exterior wall tiles 2.

[0027] In another example, the index value may be the ratio of the vibration intensity in the second frequency band to the vibration intensity (i.e., vibration component) in the first frequency band. Here, the first frequency band may be the frequency band in the spectral data in which the vibration intensity tends not to increase even when peeling occurs in the exterior wall tiles 2, and the second frequency band may be the frequency band in which the vibration intensity tends to increase when peeling occurs in the exterior wall tiles 2. In this case, the vibration intensity in the first frequency band may be, for example, the average or maximum value of the vibration intensity in that frequency band, and similarly, the vibration intensity in the second frequency band may be the average or maximum value of the vibration intensity in that frequency band.

[0028] The determination unit 13d determines whether or not the exterior wall tiles 2 are peeling off based on a comparison between the index value obtained by the index value acquisition unit 13c and a reference value. For example, if the determination unit 13d finds that the obtained index value is greater than the reference value, it determines that the exterior wall tiles 2 are peeling off. The reference value may be a value predetermined, for example, through experimentation. The reference value may also be predetermined according to the assumed type of exterior wall tiles 2 and the assumed type of exterior wall surface 1.

[0029] The output unit 13e outputs according to the determination result of the determination unit 13d regarding whether or not the exterior wall tiles 2 have peeled off. If the determination unit 13d determines that the exterior wall tiles 2 have peeled off from the exterior wall surface 1, the output unit 13e may be a sound output unit that outputs a sound indicating that fact. Alternatively, if the determination unit 13d determines that the exterior wall tiles 2 have peeled off from the exterior wall surface 1, the output unit 13e may be a display that shows an image indicating that fact.

[0030] (Effects of the embodiment) In the tile detachment detection device 10 according to this embodiment, vibrations generated by tapping the exterior wall tiles 2 with the tapping portion 11a of the tapping body 11 are detected by the vibration sensor 12 of the tapping body 11, and the detection device 13 determines whether or not the exterior wall tiles 2 have detached based on the detected vibrations. Therefore, a stable or highly accurate detection result can be obtained regardless of the skill level of the inspector.

[0031] Since the tapping body 11 used to tap the exterior wall tiles 2 is equipped with a vibration sensor 12, the installation of the vibration sensor 12 is unnecessary. Therefore, the presence or absence of peeling of the exterior wall tiles 2 can be inspected efficiently.

[0032] The tapping body 11 is constructed by providing a tapping section 11a at the tip of a rod-shaped support section 11b. Therefore, when the exterior wall tile 2 is tapped with the tapping section 11a, vibrations are efficiently generated in the tapping body 11, and these vibrations can be efficiently detected by the vibration sensor 12 of the tapping body 11.

[0033] In the case where a linear or strip-shaped piezoelectric element 12 is wrapped around the support portion 11b, the installation of the piezoelectric element 12 on the support portion 11b becomes easier.

[0034] In a configuration where a linear or strip-shaped piezoelectric element 12 is provided on the support portion 11b so as to extend in an elongated shape along the central axis of the rod-shaped support portion 11b, it becomes possible to accurately collect vibration data over a wide area along the central axis of the rod-shaped support portion 11b.

[0035] (Examples) Figures 3A to 3E show waveform data for exterior wall tiles 2 that have not detached from the building's exterior wall surface 1. Figures 4A to 4E show waveform data for exterior wall tiles 2 that have partially detached from the building's exterior wall surface 1. Specifically, each of Figures 3A to 4E shows waveform data generated by the waveform data generation unit 13a when four vertically continuous exterior wall tiles 2 are tapped (rubbed) from top to bottom with the tapping part 11a of the tapping body 11. The waveform data in Figures 3A to 4E are for four different exterior wall tiles between these figures. Note that on the horizontal axis of Figures 3A to 4E, the start time of tapping is around 1 second.

[0036] Numerous waveform data, as shown in Figures 3A to 4E, can be converted into spectral data. Based on this spectral data, the first and second frequencies or the first and second frequency bands described above can be selected, and the reference values ​​described above can be set.

[0037] The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the technical concept of the present invention. [Explanation of Symbols]

[0038] 1. Exterior wall surface 2. Exterior wall tiles 10. Tile peeling detection device 11 Percussion body 11a Percussion section 11b Support part 11c Handle 12. Vibration sensor (piezoelectric element) 13 Judgment device 13a Waveform data generation unit 13b Spectrum acquisition section 13c Index Value Acquisition Section 13d Judgment section 13e Output section 14 signal lines

Claims

1. A tapping body having a tapping section for tapping exterior wall tiles, A vibration sensor is provided on the tapping body to detect vibrations generated by tapping the exterior wall tiles with the tapping portion, The system includes a determination device that determines whether or not the exterior wall tiles are peeling off based on the vibration detected by the vibration sensor, The determination device is A waveform data generation unit generates waveform data showing the temporal change of vibration based on the vibration detected by the vibration sensor, A spectrum acquisition unit converts the generated waveform data into spectral data representing the vibration intensity at each frequency, An index value acquisition unit that obtains an index value regarding the presence or absence of peeling of the exterior wall tiles based on the spectral data, A determination unit that determines whether or not the exterior wall tiles are peeling off based on a comparison of the index value and the reference value, The determination unit has an output unit that, when it determines that the exterior wall tiles are peeling off, outputs a sound to that effect or displays an image to that effect. The aforementioned index value is the ratio of the vibration intensity at the second frequency to the vibration intensity at the first frequency, or the ratio of the vibration intensity in the second frequency band to the vibration intensity in the first frequency band. The first frequency or the first frequency band is a frequency or frequency band in the spectral data in which the vibration intensity does not increase even if peeling occurs in the exterior wall tiles. The second frequency or the second frequency band is the frequency or frequency band in which the vibration intensity increases when peeling occurs in the exterior wall tiles. The aforementioned reference value is a predetermined value. The determination unit determines that the exterior wall tile is peeling off when the index value is greater than the reference value. The tapping body has a rod-shaped support portion, and the tapping portion is provided at the tip of the support portion. The vibration sensor is a tile peeling detection device provided at the tip of the support portion.

2. A tapping body having a tapping section for tapping exterior wall tiles, A vibration sensor is provided on the tapping body to detect vibrations generated by tapping the exterior wall tiles with the tapping portion, The system includes a determination device that determines whether or not the exterior wall tiles are peeling off based on the vibration detected by the vibration sensor, The determination device is A waveform data generation unit generates waveform data showing the temporal change of vibration based on the vibration detected by the vibration sensor, A spectrum acquisition unit converts the generated waveform data into spectral data representing the vibration intensity at each frequency, An index value acquisition unit that obtains an index value regarding the presence or absence of peeling of the exterior wall tiles based on the spectral data, A determination unit that determines whether or not the exterior wall tiles are peeling off based on a comparison of the index value and the reference value, The determination unit has an output unit that, when it determines that the exterior wall tiles are peeling off, outputs a sound to that effect or displays an image to that effect. The aforementioned index value is the ratio of the vibration intensity at the second frequency to the vibration intensity at the first frequency, or the ratio of the vibration intensity in the second frequency band to the vibration intensity in the first frequency band. The first frequency or the first frequency band is a frequency or frequency band in the spectral data in which the vibration intensity does not increase even if peeling occurs in the exterior wall tiles. The second frequency or the second frequency band is the frequency or frequency band in which the vibration intensity increases when peeling occurs in the exterior wall tiles. The aforementioned reference value is a predetermined value. The determination unit determines that the exterior wall tile is peeling off when the index value is greater than the reference value. The tapping body has a rod-shaped support portion, and the tapping portion is provided at the tip of the support portion. The vibration sensor is a piezoelectric element formed in a linear or strip shape, A tile peeling detection device, wherein the piezoelectric element is attached to the support portion in a state where it is wrapped around the support portion so as to extend in a direction rotating around the central axis of the rod-shaped support portion.

3. A tapping body having a tapping section for tapping exterior wall tiles, A vibration sensor is provided on the tapping body to detect vibrations generated by tapping the exterior wall tiles with the tapping portion, The system includes a determination device that determines whether or not the exterior wall tiles are peeling off based on the vibration detected by the vibration sensor, The determination device is A waveform data generation unit generates waveform data showing the temporal change of vibration based on the vibration detected by the vibration sensor, A spectrum acquisition unit converts the generated waveform data into spectral data representing the vibration intensity at each frequency, An index value acquisition unit that obtains an index value regarding the presence or absence of peeling of the exterior wall tiles based on the spectral data, A determination unit that determines whether or not the exterior wall tiles are peeling off based on a comparison of the index value and the reference value, The determination unit has an output unit that, when it determines that the exterior wall tiles are peeling off, outputs a sound to that effect or displays an image to that effect. The aforementioned index value is the ratio of the vibration intensity at the second frequency to the vibration intensity at the first frequency, or the ratio of the vibration intensity in the second frequency band to the vibration intensity in the first frequency band. The first frequency or the first frequency band is a frequency or frequency band in the spectral data in which the vibration intensity does not increase even if peeling occurs in the exterior wall tiles. The second frequency or the second frequency band is the frequency or frequency band in which the vibration intensity increases when peeling occurs in the exterior wall tiles. The aforementioned reference value is a predetermined value. The determination unit determines that the exterior wall tile is peeling off when the index value is greater than the reference value. The tapping body has a rod-shaped support portion, and the tapping portion is provided at the tip of the support portion. The vibration sensor is a piezoelectric element formed in a linear or strip shape, The piezoelectric element is provided on the support portion such that it extends in an elongated shape along the central axis of the rod-shaped support portion, in a tile peeling detection device.

4. The tile peeling determination device according to any one of claims 1 to 3, wherein the tapping body has a handle portion provided on the base side portion of the rod-shaped support portion.

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