Sealing abnormality detection method and sealing abnormality detection system

Abstract

To provide a sealing abnormality detection method and a sealing abnormality detection system that can detect sealing abnormalities such as moisture remaining at the boundary between a joint tape placed inside an exterior wall and a sealant.SOLUTION: A sealing abnormality detection method includes: a frequency setting step (step S11) of irradiating a sealant 22 with electromagnetic waves B from the surface of a decorative material 30 and setting the frequency of the electromagnetic waves B that enables detection of a component of reflected waves C which changes depending on whether or not moisture remains at the boundary between a joint tape 33 and the sealant 22 from the reflected waves C reflected by the sealant 22; an irradiation and reception step (step S12) of irradiating the sealant 22 with electromagnetic waves B of the set frequency from the surface of the decorative material 30 and receiving the reflected waves C reflected by the sealant 22; and an abnormality detection step (step S15) of detecting a sealing abnormality based on the component of the reflected waves C.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a technology for a method and system for detecting sealing abnormalities in the exterior walls of buildings. [Background technology]

[0002] The tile base for exterior walls, which are made up of decorative tiles arranged in multiple layers, typically consists of a sealant placed between the siding boards, which is then covered with butyl rubber joint tape to prevent the siding boards from shifting due to changes in the external environment. The sealant used here hardens when exposed to heat or ultraviolet light, and its ability to adapt to the deformation, contraction, and expansion of the exterior wall material decreases, leading to a deterioration process that can lead to cracks and breaks. As deterioration progresses, rainwater can seep into the wall, causing leaks and expanding the area of ​​deterioration. Therefore, regular inspections are required to detect deterioration early and perform maintenance (replacing) the sealant.

[0003] Normally, deterioration of sealants can be diagnosed by visually checking for cracks or breaks, but at this stage the sealant has already reached the end of its lifespan and damage may have spread due to rainwater seepage, so this is not an early detection method.

[0004] For example, Patent Document 1 discloses a method for detecting deterioration of a sealant by inserting a measuring needle into the sealant and determining the deterioration of the sealant from the load acting on the measuring needle.In addition to this, for example, Patent Document 2 discloses a technology for diagnosing deterioration inside an exterior wall material using electromagnetic waves.

[0005] However, in rare cases, rainwater itself may penetrate the boundary between the joint tape and the sealant, or water droplets may remain because the moisture contained in the material is prevented from evaporating.In such situations, it is desirable to detect the moisture that has remained at the boundary between the joint tape and the sealant. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2020-129004 [Patent Document 2] Japanese Patent Application Publication No. 2020-183919 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and the problem it aims to solve is to provide a sealing abnormality detection method and sealing abnormality detection system that can detect sealing abnormalities such as moisture remaining at the boundary between a joint tape placed inside an exterior wall and a sealant. [Means for solving the problem]

[0008] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0009] That is, claim 1 provides a sealing abnormality detection method for detecting sealing abnormalities, including moisture accumulation at the boundary between a joint tape and a sealant, for an exterior wall of a building having an exterior wall base material in which a sealant is placed between siding boards and a decorative material in which a joint tape is placed to cover the sealant, the method comprising the steps of: preparing a test specimen of the exterior wall; irradiating electromagnetic waves from the surface of the decorative material to the sealant in the test specimen; and setting a frequency of the electromagnetic waves that enables detection of components of the reflected waves that change depending on the presence or absence of moisture accumulation at the boundary between the joint tape and the sealant from the reflected waves reflected by the sealant; an irradiation and reception process for irradiating the electromagnetic waves of the set frequency to the sealant from the surface of the decorative material in the exterior wall of the building and receiving the reflected waves reflected by the sealant; and an abnormality detection process for detecting the sealing abnormality based on the components of the reflected waves.

[0010] In claim 2, the component of the reflected wave is either the amplitude ratio of the reflected wave to the amplitude of the electromagnetic wave at the set frequency, or the phase difference of the reflected wave to the electromagnetic wave at the set frequency.

[0011] In claim 3, the component of the reflected wave is either a real part or an imaginary part obtained by complex transforming the amplitude ratio and the phase difference.

[0012] In claim 4, in the frequency setting process, a first frequency group is set, which is the frequency of the electromagnetic wave at which the component of the reflected wave that changes depending on whether or not the moisture is stagnating can be detected; in the irradiation and reception process, the electromagnetic wave of the first frequency group is irradiated and the reflected wave reflected by the sealing material is received; and in the abnormality detection process, the sealing abnormality is detected by extracting the parts where the moisture is stagnating and the parts where it is not stagnating based on the component of the reflected wave.

[0013] In claim 5, in the frequency setting process, a second frequency group is set, which is the frequency of the electromagnetic wave at which the component of the reflected wave that changes depending on the presence or absence of the stagnant moisture and the deterioration of the sealant can be detected; in the irradiation and reception process, the electromagnetic wave of the second frequency group is irradiated and the reflected wave reflected by the sealant is received; and in the abnormality detection process, the sealing abnormality is detected by extracting the parts where the moisture is stagnant, the parts where the sealant is deteriorated, and the parts where the sealant is not deteriorated based on the components of the reflected wave.

[0014] In claim 6, in the frequency setting process, a third frequency group is set, which is the frequency of the electromagnetic waves at which the components of the reflected waves that change depending on the presence or absence of the stagnant moisture and the deterioration of the sealant can be detected; in the irradiation and reception process, the electromagnetic waves of the third frequency group are irradiated and the reflected waves reflected by the sealant are received; and in the abnormality detection process, the sealing abnormality is detected by extracting the parts where the moisture is stagnant or the parts where the sealant is deteriorated and the parts where the sealant is not deteriorated based on the components of the reflected waves.

[0015] Claim 7 provides a sealing abnormality detection system for detecting sealing abnormalities, including moisture accumulation at the boundary between the joint tape and the sealant, for the exterior wall of a building having an exterior wall base material in which a sealant is placed between siding boards and a decorative material in which joint tape is placed to cover the sealant, and the system comprises an irradiation receiving device that irradiates electromagnetic waves from the surface of the decorative material to the sealant, receives reflected waves reflected by the sealant, and has a frequency of the electromagnetic waves set to enable detection of components of the reflected waves that change depending on whether moisture is accumulated at the boundary between the joint tape and the sealant, and a calculation device that performs calculations to detect the sealing abnormality, and the calculation device detects the sealing abnormality based on the components of the reflected waves received from the irradiation receiving device. [Effects of the Invention]

[0016] The present invention has the following effects.

[0017] In claim 1, it is possible to detect sealing abnormalities such as moisture remaining at the boundary between the joint tape placed inside the exterior wall and the sealant.

[0018] According to claim 2, the accuracy of detecting sealing abnormalities can be improved.

[0019] According to claim 3, the accuracy of detecting sealing abnormalities can be improved.

[0020] According to claim 4, moisture remaining at the boundary between the joint tape and the sealant can be detected.

[0021] According to claim 5, it is possible to detect the accumulation of moisture at the boundary between the joint tape and the sealant, and the deterioration of the sealant.

[0022] In claim 6, it is possible to detect areas where abnormalities in the sealing portion (such as moisture accumulation at the boundary between the joint tape and the sealing material, or deterioration of the sealing material) have occurred and areas where no abnormalities have occurred in the sealing portion.

[0023] According to claim 7, it is possible to detect sealing abnormalities such as moisture remaining at the boundary between the joint tape placed inside the exterior wall and the sealant. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a schematic perspective view illustrating the relationship between an exterior wall including a sealing material that is a target for anomaly detection and an irradiation and receiving device of the anomaly detection system. [Figure 2] 1A is a schematic side cross-sectional view showing an external wall and an abnormality detection system according to the present embodiment, and FIG. 1B is a schematic plan cross-sectional view showing an external wall and an abnormality detection system according to the present embodiment. [Figure 3] FIG. 2 is a diagram for explaining a complex transformation performed by a calculation device of the anomaly detection system. [Figure 4] 1 is a flow diagram of a detection method using an anomaly detection system. [Figure 5] 1A is a schematic plan cross-sectional view showing an anomaly detection system and an exterior wall according to another example, FIG. 1B is a schematic plan cross-sectional view showing an example of a test specimen, and FIG. 1C is a schematic side cross-sectional view showing a sealing material of the test specimen. [Figure 6]10(a) is a graph showing an anomaly detection result using frequencies of the first frequency group, and FIG. 10(a) is a graph showing an anomaly detection result using frequencies of the second frequency group. [Figure 7] 10 is a graph showing anomaly detection results using frequencies of a third frequency group. DETAILED DESCRIPTION OF THE INVENTION

[0025] A sealing abnormality detection method and a sealing abnormality detection system according to an embodiment of the present invention will be described below.

[0026] 1. About exterior wall 20 As shown in Fig. 1, in this embodiment, the anomaly detection system 10 detects anomalies (sealing anomalies) in the sealing portion between siding boards 21, 21 that form the surface of an exterior wall base material 20A of an exterior wall 20 of a building from reflected waves of electromagnetic waves irradiated onto the exterior wall 20. Sealing anomalies include moisture accumulation at the boundary between the sealant 22 placed between the siding boards 21, 21 and the joint tape 33 that covers the sealant 22. Furthermore, anomalies in the sealing portion include deterioration of the sealant 22.

[0027] In this embodiment, the exterior wall 20 is a member corresponding to the exterior wall of a building to be inspected. The exterior wall 20 includes an exterior wall base material 20A and a decorative material 30 laid on the exterior wall base material 20A. In this embodiment, the building is a wooden house or a steel-framed house, and the exterior wall base material 20A has a structure of the exterior wall 20 of the building in which a plurality of siding boards 21, 21 are provided on the outdoor side and a gypsum board 28 is provided on the indoor side.

[0028] Examples of the siding board 21 include ceramic siding boards formed into boards using cementitious and fibrous materials as the main raw materials. The ceramic siding boards may be wood fiber reinforced cement boards, fiber reinforced cement boards, or fiber reinforced cement-calcium silicate boards.

[0029] The sealant 22 may be either a shaped sealant or an amorphous sealant, and its material may be a resin material that utilizes mixed reaction curing or moisture curing, such as a silicone-based, modified silicone-based, polysulfide-based, acrylic urethane-based, or polyurethane-based material, or a material that utilizes dry curing, such as an acrylic-based, SBR-based, or butyl rubber-based material.

[0030] A sealant 22 is filled between the siding boards 21, 21 that form the exterior wall surface of the exterior wall 20. For example, a wood board may be provided as structural plywood between the siding board 21 and the gypsum board 28. In this embodiment, vertical furring strips 24 and studs 25 are arranged between the siding board 21 and the gypsum board 28.

[0031] A metal plate 27 and a fire-resistant material (fiber-based fire-resistant material) 26 such as glass wool are disposed between the siding board 21 and the gypsum board 28. An insulating board made of a foamed resin board such as polystyrene foam may also be disposed. A moisture-proof material may also be provided instead of the metal plate 27. A foamed resin insulating material 24A may be disposed on the back surface of the sealant 22, and a pair of retaining materials 24B, 24B made of polystyrene resin may be disposed on both sides of the foamed resin material that holds the insulating material 24A. A ventilation layer may also be formed between the siding board 21 and the fire-resistant material 26. A metal or resin joint joiner may be disposed on the back surface of the sealant 22 to join the siding boards 21, 21. Alternatively, instead of the insulating material 24A and the retaining material 24B, a metal plate 29A, a resin plate 29B, or a wooden plywood 29C may be disposed on the back surface of the sealant 22, as shown in FIG. 5(a).

[0032] Joint tape (butyl tape) 33 made of, for example, butyl rubber is attached to the opposing edges of the siding boards 21, 21 along the sealant 22 so as to cover it. The joint tape 33 can absorb displacement of the siding boards 21, 21. Mesh members 34, 34 are arranged on both sides of the joint tape 33 along the surface of the sealant 22, and a curing adhesive is applied to the mesh members 34, 34.

[0033] In this embodiment, the mesh members 34, 34 are arranged to sandwich the joint tape 33, but instead of the joint tape 33, the sealant 22 may be covered with the mesh member 34 as long as the decorative material 30 (described later) can be stably placed on the exterior wall base material 20A via the mesh member 34. The decorative material 30 is an exterior material in which a plurality of tiles 31 are arranged on the exterior wall base material 20A. Mortar or the like is filled between the tiles 31. The tiles 31 are molded bodies made primarily from natural clay or minerals. The decorative material 30 is attached to the exterior wall base material 20A via an adhesive applied to the mesh member 34.

[0034] 2. Hardware of Anomaly Detection System 10 2-1. About the irradiation receiving device 3 The abnormality detection system 10 includes an irradiation receiving device 3 that performs non-destructive testing of the sealing material 22 of the exterior wall 20 described above using electromagnetic waves B. As shown in Fig. 2, the irradiation receiving device 3 irradiates electromagnetic waves B of different frequencies each having a certain amplitude from the decorative material 30 of the exterior wall 20 toward the interior of the exterior wall 20, and receives reflected waves C reflected by the exterior wall 20 at each frequency.

[0035] The irradiation receiving device 3 includes a housing 15. A handle 17 that an operator can hold is provided on one side of the housing 15. Wheels 13 are provided on the other side of the housing 15 at a position facing an outer wall 20, which is the object to be inspected. A transmitter 11 and a receiver 12 are arranged inside the housing 15.

[0036] The transmitter 11 is a device that irradiates electromagnetic waves B onto the exterior wall 20. The transmitter 11 is set to emit electromagnetic waves B having a predetermined amplitude and a constant frequency. The transmitter 11 irradiates the electromagnetic waves B in accordance with the rotation speed of the wheels 13. This allows the irradiation receiving device 3 (transmitter 11) to irradiate the electromagnetic waves B at constant intervals along the wall surface of the exterior wall 20 (decorative material 30) described below.

[0037] 2-2. Frequency for detecting abnormalities in electromagnetic wave B emitted by transmitter 11 In this embodiment, electromagnetic waves B are irradiated onto the sealant 22, and electromagnetic wave anomaly detection frequencies are also set that can detect components of the reflected waves C that change depending on sealing anomalies (such as accumulation of moisture at the boundary between the sealant 22 and the joint tape 33, or deterioration of the sealant 22) from the reflected waves C reflected by the sealant 22. The anomaly detection frequencies include a first frequency group, a second frequency group, and a third frequency group.

[0038] 2-2-1. First frequency group of electromagnetic waves B emitted by transmitter 11 The first frequency group of electromagnetic waves B includes frequencies of electromagnetic waves B that make it possible to detect portions where moisture accumulates at the boundary between the sealant 22 and the joint tape 33 (hereinafter referred to as "moisture accumulation portions") and portions where moisture does not accumulate at the boundary (hereinafter referred to as "moisture non-accumulation portions") from the components of reflected waves C that are obtained by irradiating electromagnetic waves B from the surface of the decorative material 30 to the sealant 22. Note that the first frequency group does not necessarily make it possible to detect deteriorated and non-deteriorated portions of the sealant 22 from the components of reflected waves C.

[0039] The frequencies of the first frequency group are not particularly limited as long as they can detect water retention areas and water non-retention areas from the components of the reflected wave C. The frequency range of the first frequency group is preferably, for example, 7.0 GHz to 12.0 GHz, and multiple different frequencies can be set within this range. The first frequency group includes, for example, three frequencies: (1) 9.2±0.2 GHz, (2) 10.4±0.2 GHz, and (3) 11.2±0.2 GHz.

[0040] 2-2-2. Second frequency group of electromagnetic wave B emitted by transmitter 11 The second frequency group of electromagnetic waves B includes frequencies of electromagnetic waves B that make it possible to detect moisture-retaining areas (whether the sealant 22 is deteriorated or not), deteriorated areas of the sealant 22 (hereinafter referred to as "sealing deterioration areas"), and undeteriorated areas of the sealant 22 (hereinafter referred to as "sealing non-deterioration areas") from the components of the reflected waves C reflected by the sealant 22 when the electromagnetic waves B are irradiated from the surface of the decorative material 30 to the sealant 22.

[0041] The frequencies of the second frequency group are not particularly limited as long as they can detect moisture-accumulating areas, deteriorated sealant areas, and non-deteriorated sealant areas from the components of the reflected wave C. The range of frequencies of the second frequency group is preferably, for example, 7.0 GHz to 12.0 GHz, and multiple different frequencies can be set within this range. The second frequency group includes, for example, one frequency of (4) 8.0±0.2 GHz.

[0042] 2-2-3. Regarding the third frequency group of electromagnetic waves B emitted by transmitter 11 The third frequency group of electromagnetic waves B includes frequencies of electromagnetic waves B that can detect abnormal sealing areas (moisture-retaining areas or deteriorated sealing areas) and non-abnormal sealing areas (non-moisture-retaining areas or non-deteriorated sealing areas) from the components of reflected waves C reflected by the sealant 22 when electromagnetic waves B are irradiated from the surface of the decorative material 30 to the sealant 22.

[0043] The frequencies of the third frequency group are not particularly limited as long as they can detect sealing abnormalities (moisture-retaining areas or sealing degradation areas) and sealing non-abnormalities (moisture-non-retaining areas or sealing non-degraded areas) from the components of the reflected wave C. The range of frequencies of the third frequency group is preferably, for example, 7.0 GHz to 12.0 GHz, and multiple different frequencies can be set within this frequency band. The third frequency group includes, for example, three frequencies: (5) 9.2±0.2 GHz, (6) 11.2±0.2 GHz, and (7) 11.6±0.2 GHz.

[0044] 2-2-4. How to set the frequency for detecting abnormalities in electromagnetic wave B The following describes how to set the frequencies (first frequency group, second frequency group, and third frequency group) for detecting anomalies in electromagnetic waves B. First, as shown in FIGS. 5(b) and 5(c), a specimen of an exterior wall to be measured, or a specimen of an exterior wall similar thereto (specimen E), is prepared in advance. Specimen E has a sealant 22, and a deteriorated sealant portion 22a and a non-deteriorated sealant portion 22b are arranged in the longitudinal direction of the sealant 22. Here, the deteriorated sealant portion 22a is a portion where the function of the sealant 22 has been impaired and has deteriorated to the extent that repair is required. The degree of deterioration of the deteriorated sealant portion 22a is considered to be in the early stage of deterioration. On the other hand, the non-deteriorated sealant portion 22b is a portion where the function of the sealant 22 is not impaired and repair is not required. A wet, water-absorbent piece of paper 22c is placed across the boundary between the deteriorated sealant portion 22a and the non-deteriorated sealant portion 22b, simulating stagnant water (water droplets stagnating at the boundary between the sealant 22 and the joint tape 33). Tissue paper or the like can be used as the piece of paper 22c.

[0045] When setting the frequencies of the first frequency group, electromagnetic waves B are irradiated onto the test piece E using the irradiation and receiving device 3 while gradually changing the frequency so that a component of the reflected wave C that can distinguish between the part where the moisture-containing paper piece 22c is placed (moisture-retaining part) and the part of the sealing material 22 where the paper piece 22c is not placed (moisture-non-retaining part) can be detected.

[0046] When setting the frequencies of the second frequency group, electromagnetic waves B are irradiated onto the test piece E using the irradiation and receiving device 3 while gradually changing the frequency so that components of the reflected wave C that can distinguish between the area where the moist paper piece 22c is placed (moisture retention area), the area of ​​the sealing deterioration area 22a where the paper piece 22c is not placed, and the area of ​​the sealing non-deterioration area 22b where the paper piece 22c is not placed can be detected.

[0047] When setting the frequencies of the third frequency group, electromagnetic waves B are irradiated onto the test piece E using the irradiation and receiving device 3 while gradually changing the frequency so that a component of the reflected wave C that can distinguish between either the part where the moist piece of paper 22c is placed or the sealing deterioration part 22a (sealing abnormal part) and the part of the sealing deterioration part 22a where the paper piece 22c is not placed (sealing non-abnormal part) can be detected.

[0048] In this way, all frequencies consisting of the anomaly detection frequencies (first frequency group, second frequency group, and third frequency group) are set in the transmitter 11 of the irradiation and receiving device 3. The transmitter 11 can emit electromagnetic waves of the anomaly detection frequencies in stages.

[0049] 2-3. About receiver 12 The receiver 12 is a device that receives reflected waves C that are the result of electromagnetic waves B transmitted from the transmitter 11 being reflected by the exterior wall 20 (specifically, the sealing material 22). Here, the electromagnetic waves B transmitted (irradiated) by the transmitter 11 are either reflected by the surface of the decorative material 30 or reflected by the siding board 21 and the sealing material 22 after being refracted, attenuated, and transmitted inside the decorative material 30, etc.

[0050] At the set frequency of electromagnetic wave B, receiver 12 receives the waves resulting from the physical interference of these reflected waves as reflected wave C. Because the frequency of electromagnetic wave B is set such that it is difficult to be reflected or attenuated by decorative material 30, etc., but is easy to reflect by siding board 21 and sealant 22, and it is possible to distinguish between those reflected by decorative material 30, etc. and those reflected by siding board 21 and sealant 22, it is possible to distinguish between the two based on the components of reflected wave C.

[0051] Furthermore, when the electromagnetic waves B of the anomaly detection frequencies (first frequency group, second frequency group, and third frequency group) are irradiated onto the sealant 22, the components of the received reflected waves C contain information about the presence or absence of moisture at the boundary between the joint tape 33 and the sealant 22, and about the hardness of the sealant 22 (i.e., deterioration of the sealant 22). These reflected waves C are recorded in a storage device (not shown) provided in the housing 15 or a storage device (not shown) provided together with the computing device 4. In this way, the receiver 12 can receive reflected waves C in response to electromagnetic waves of the position detection frequencies, and can also receive reflected waves C of the anomaly detection frequencies in response to the anomaly detection frequencies.

[0052] The abnormality detection system 10 includes a calculation device 4 that performs calculations to detect the position and deterioration of the sealing material 22 and the presence or absence of stagnant water, and a display device 5 that displays the results of calculations performed by the calculation device 4. In this embodiment, the calculation device 4 and the display device 5 are provided separately from the irradiation receiving device 3, but they may also be provided integrally with the irradiation receiving device 3.

[0053] 3. About the arithmetic unit 4 As shown in FIGS. 2(a) and 2(b), the calculation device 4 determines the deterioration of the sealing material 22 and the presence or absence of stagnant water based on the components of the reflected wave C. The calculation device 4 calculates the amplitude ratio of the reflected wave C to the amplitude of the electromagnetic wave B at each frequency, and the phase difference of the reflected wave C relative to the electromagnetic wave B at each frequency. Here, since the reflected wave C is a waveform composed of multiple frequencies, the calculation device 4 may identify the frequency that is the main component of the reflected wave C (i.e., the frequency with the highest spectrum (largest amplitude)) using frequency analysis such as FFT, and calculate the amplitude ratio L and phase difference P from the amplitude and phase of the reflected wave C at the identified frequency. As an alternative method, the reflected wave C may be directly received, the peak of the received waveform may be used as the amplitude, and the phase of the peak period may be determined, and the amplitude ratio L and phase difference P may be calculated from these amplitudes and phases.

[0054] Here, the component of the reflected wave C used to determine whether there is a sealing abnormality (presence or absence of stagnant water and deterioration of the sealing material 22) may be either the amplitude ratio L of the reflected wave C to the amplitude of the electromagnetic wave B at the set frequency, or the phase difference P of the reflected wave C to the electromagnetic wave B at the set frequency. In other words, the threshold value of the amplitude ratio or phase difference that serves as the criterion for the presence or absence of a sealing abnormality is set together with the frequency of the electromagnetic wave B from the above-mentioned experiment.

[0055] The calculation device 4 determines whether or not there is a sealing abnormality by comparing the magnitude of the calculated amplitude ratio L or phase difference P of the reflected wave C with a set threshold. Note that experiments by the inventors have shown that both the calculated amplitude ratio L and phase difference P of the reflected wave C change as a sealing abnormality occurs. In this case, the presence or absence of a sealing abnormality can be detected with high accuracy by comparing the magnitude of one of the amplitude ratio L or phase difference P of the reflected wave C with the threshold corresponding to that value.

[0056] In addition, the presence or absence of a sealing abnormality may be determined based on the amplitude ratio L and phase difference P of the reflected wave C and threshold values ​​corresponding to the amplitude ratio L and phase difference P, and if it is determined that a sealing abnormality has occurred based on either of the determination results, it may be determined that a sealing abnormality has occurred.

[0057] Here, the component of the reflected wave C used to determine whether or not there is a sealing abnormality may be either the real part R or the imaginary part K obtained by complex transforming the amplitude ratio L and the phase difference P. The calculation device 4 performs complex transform on the amplitude ratio L and the phase difference P to calculate the real part R and the imaginary part K. Specifically, as shown in FIG. 3, points T corresponding to the amplitude ratio L and the phase difference P are plotted on a complex plane, and the values ​​of the real part R and the imaginary part K on the real axis and the imaginary axis are calculated. In this case as well, the threshold value of the real part R or the imaginary part K, which serves as a criterion for determining whether or not there is a sealing abnormality, is set together with the frequency of the electromagnetic wave B from the above-mentioned experiment.

[0058] The calculation device 4 determines whether or not there is a sealing abnormality by comparing the magnitude of the calculated complex-converted real part R and imaginary part K with a set threshold. Note that experiments by the inventors have shown that both the complex-converted real part R and imaginary part K change with the occurrence of a sealing abnormality (presence or absence of stagnant water, and deterioration of the sealing material 22). Therefore, by comparing the magnitude of one of the complex-converted real part R or imaginary part K with the corresponding threshold, it is possible to accurately detect whether or not there is a sealing abnormality. In this embodiment, the complex-converted real part R and imaginary part K are identification data on the same complex plane, so it is possible to more accurately identify whether or not there is a sealing abnormality.

[0059] In addition, the presence or absence of a sealing abnormality may be determined based on the real part R, the imaginary part K, and their corresponding threshold values, and if it is determined that a sealing abnormality has occurred based on either of the determination results, it may be determined that a sealing abnormality has occurred.

[0060] Furthermore, the calculation device 4 may calculate the average value of data at multiple positions calculated from the reflected wave C for the data (amplitude ratio L, phase difference P, real part R, or imaginary part K) used to determine deterioration, and determine whether this average value is larger or smaller than the threshold value set for each data (the threshold value described above).

[0061] This makes it possible to determine whether or not there is a sealing abnormality from the components of the reflected wave C received at multiple positions along the longitudinal direction of the sealing material 22. Therefore, even if there is variation in the components of the reflected wave C due to measurement errors or the like, this variation can be smoothed out. This makes it possible to accurately determine whether or not there is a sealing abnormality.

[0062] For example, when irradiating electromagnetic waves B of the first frequency group consisting of the three frequencies shown in (1) to (3) above, the calculation device 4 uses (1) the imaginary part of 9.2±0.2 GHz, (2) the real part of 10.4±0.2 GHz, and (3) the imaginary part of 11.2±0.2 GHz as the identification data. Furthermore, when irradiating electromagnetic waves B of the second frequency group consisting of one frequency shown in (4) above, the calculation device 4 uses (4) the imaginary part of 8.0±0.2 GHz as the identification data. Furthermore, when irradiating electromagnetic waves B of the third frequency group consisting of three frequencies shown in (5) to (7) above, the calculation device 4 uses (5) the imaginary part of 9.2±0.2 GHz, (6) the real part of 11.2±0.2 GHz, and (7) the imaginary part of 11.6±0.2 GHz as the identification data.

[0063] The method for determining whether a sealing abnormality exists will be described below with reference to the flow chart in FIG.

[0064] In step S11, the frequency of the electromagnetic waves B to be irradiated onto the exterior wall 20 is set. First, a specimen E corresponding to the exterior wall 20 is prepared, as shown in FIGS. 5(b) and 5(c). The configuration of the specimen E is as described above. The sealing material 22 of the specimen E thus formed is scanned by the irradiation and reception device 3 while transmitting and receiving microwaves of 8.0 to 11.6 GHz, and data on the amplitude ratio L and the phase difference P is obtained.

[0065] Specifically, when electromagnetic waves B of a frequency of the first frequency group (e.g., 9.2±0.2 GHz, 10.4±0.2 GHz, 11.2±0.2 GHz) are irradiated onto the sealing material 22, the calculation device 4 extracts the areas where the pieces of paper 22c containing moisture are placed (moisture retention areas) and the areas of the sealing material 22 where the pieces of paper 22c are not placed (moisture non-retention areas) based on the components of the multiple reflected waves C received at multiple positions on the sealing material 22 (e.g., the imaginary part of 9.2±0.2 GHz, the real part of 10.4±0.2 GHz, the imaginary part of 11.2±0.2 GHz).

[0066] Fig. 6(a) is a graph showing the results of anomaly detection using frequencies of the first frequency group. The horizontal axis of the graph indicates positions (positions 1 to 23) in the longitudinal direction (vertical direction) of the sealing material 22. Positions 1 to 9 are parts of the sealing deterioration portion 22a where the moist paper piece 22c is not placed, positions 10 to 17 are parts where the moist paper piece 22c is placed, and positions 18 to 23 are parts of the sealing non-deterioration portion 22b where the moist paper piece 22c is not placed. Positions 1 to 23 are the same in the graphs shown in Fig. 6(b) and Fig. 7, which will be described later.

[0067] As shown in FIG. 6(a), in the specific real and imaginary part data (imaginary part of 9.2±0.2 GHz, real part of 10.4±0.2 GHz, imaginary part of 11.2±0.2 GHz) of the reflected wave C obtained by irradiating the electromagnetic wave B having a frequency in the first frequency group, there is a significant difference between the values ​​of the imaginary part data or real part data at positions 10 to 17 and the values ​​of the imaginary part data or real part data at other positions (positions 1 to 9 and positions 18 to 23). Therefore, it is possible to extract the portions where the moist pieces of paper 22c are placed (moisture-retaining portions) and the portions of the sealant 22 where the pieces of paper 22c are not placed (moisture-free portions). Therefore, in step S12 described below, the presence or absence of stagnant water can be determined by irradiating the sealant 22 with electromagnetic wave B having a frequency of 9.2±0.2 GHz, 10.4±0.2 GHz, or 11.2±0.2 GHz.

[0068] Furthermore, when electromagnetic waves B of a frequency of the second frequency group (e.g., 8.0±0.2 GHz) are irradiated onto the sealing material 22, the calculation device 4 extracts the areas where the pieces of paper 22c containing moisture are placed (moisture retention areas), the areas of the sealing degradation area 22a where the pieces of paper 22c are not placed, and the areas of the sealing non-degradation area 22b where the pieces of paper 22c are not placed, based on the components of the multiple reflected waves C (e.g., the imaginary parts of 8.0±0.2 GHz) received at multiple positions on the sealing material 22.

[0069] FIG. 6(b) is a graph showing the results of anomaly detection using frequencies in the second frequency group. As shown in FIG. 6(b), in the specific imaginary part data (imaginary part of 8.0±0.2 GHz) of the reflected wave C obtained by irradiating electromagnetic waves B of the second frequency group, there are significant differences between the values ​​of the imaginary part data at positions 1 to 9, the values ​​of the imaginary part data at positions 10 to 17, and the values ​​of the imaginary part data at positions 18 to 23. Therefore, it is possible to extract the portion where the moist piece of paper 22c is located (moisture-retaining portion), the portion of the sealant-deteriorated portion 22a where the piece of paper 22c is not located, and the portion of the non-deteriorated portion 22b where the piece of paper 22c is not located. Therefore, in step S12 described below, by irradiating the sealant 22 with electromagnetic waves B of a frequency of 8.0±0.2 GHz, it is possible to identify the moisture-retaining portion (regardless of whether the sealant 22 is deteriorated or not), the deteriorated sealant portion, and the non-deteriorated sealant portion.

[0070] Furthermore, when electromagnetic waves B of a frequency of the third frequency group (e.g., 9.2±0.2 GHz, 11.2±0.2 GHz, 11.6±0.2 GHz) are irradiated onto the sealing material 22, the calculation device 4 extracts either a portion where a piece of paper 22c containing moisture is placed or a non-degraded sealing portion 22b (sealing abnormal portion), and a portion of the sealing degradation portion 22a where no piece of paper 22c is placed (sealing non-abnormal portion), based on the components of multiple reflected waves C received at multiple positions on the sealing material 22 (e.g., the real part of 9.2±0.2 GHz, the real part of 11.2±0.2 GHz, the imaginary part of 11.6±0.2 GHz).

[0071] 7 is a graph showing the results of anomaly detection using frequencies in the third frequency group. As shown in FIG. 7, in the specific real and imaginary part data (real part of 9.2±0.2 GHz, real part of 11.2±0.2 GHz, imaginary part of 11.6±0.2 GHz) of the reflected wave C obtained by irradiating electromagnetic wave B of the third frequency group, there is a significant difference between the values ​​of the imaginary or real part data at positions 18-23 and the values ​​of the imaginary or real part data at other positions (positions 1-9 and positions 10-17). Therefore, it is possible to extract either the portion where the moist piece of paper 22c is placed or the non-degraded sealing portion 22b (sealing abnormal portion), and the portion of the degraded sealing portion 22a where the piece of paper 22c is not placed (sealing non-abnormal portion). Therefore, in step S12 described later, by irradiating the sealing material 22 with electromagnetic waves B having a frequency of 9.2±0.2 GHz, 11.2±0.2 GHz, or 11.6±0.2 GHz, it becomes possible to determine whether there is a sealing abnormality.

[0072] Next, in a control device (not shown) of the irradiation and reception device 3, electromagnetic waves B of multiple frequencies are irradiated from the surface of the decorative material 30 of the specimen E, which corresponds to the exterior wall 20, for each frequency, and reflected waves C are received. At this time, from the electromagnetic waves B of multiple frequencies, a frequency of the electromagnetic waves B that provides a component of the reflected waves C that changes depending on whether or not there is a sealing abnormality is selected, and this frequency is set. In other words, for each frequency, the component of the reflected waves C described above is calculated, and from the calculated components, a frequency that clearly shows a difference between areas where a sealing abnormality has occurred and areas where it has not occurred is selected, and this is set as the frequency of the electromagnetic waves B to be irradiated (frequencies of the first frequency group, second frequency group, and third frequency group).

[0073] At this time, in order to distinguish between the components of the reflected wave C from areas where a sealing abnormality has occurred and the components of the reflected wave C from areas where a sealing abnormality has not occurred, threshold values ​​(the threshold values ​​mentioned above) for these are also set.

[0074] Next, in step S12, an irradiation and reception step is performed. Specifically, electromagnetic waves B are irradiated onto the exterior wall 20 and the reflected waves are received. Specifically, as shown in Fig. 1, electromagnetic waves B having a set constant amplitude and constant frequency are irradiated from the decorative material 30 of the exterior wall 20 toward the interior of the exterior wall 20, and reflected waves C reflected by the exterior wall 20 (specifically, the sealing material 22) are received.

[0075] Specifically, while irradiating electromagnetic waves B along the longitudinal direction of the sealing material 22, reflected waves C are received at multiple positions along the longitudinal direction of the sealing material 22. More specifically, the following operations are performed. In this embodiment, since the sealing material 22 is not exposed, the position of the sealing material 22 is identified from a design drawing of the exterior wall 20 or the like. Next, while holding the handle 17 of the irradiation receiving device 3 shown in FIG. 1, the wheels 13 of the irradiation receiving device 3 are pressed against the surface of the decorative material 30. Next, while rotating the wheels 13 on the outer wall surface of the decorative material 30, the irradiation receiving device 3 is moved (scanned) in the vertical direction (or horizontal direction) along the sealing material 22, thereby irradiating electromagnetic waves B and receiving reflected waves C.

[0076] In step S13, the calculation device 4 calculates the amplitude ratio L of the reflected wave C received at each position along the longitudinal direction of the sealing material 22 and the phase difference P of the reflected wave C relative to the electromagnetic wave B.

[0077] In step S14, the calculation device 4 performs complex transformation into a real part R and an imaginary part K of the amplitude ratio L and the phase difference P calculated for each position along the longitudinal direction of the sealing material 22.

[0078] Finally, in step S15, the calculation device 4 determines whether or not there is a sealing abnormality based on the component (real part R or imaginary part K) of the reflected wave.

[0079] According to this embodiment, when electromagnetic waves B of a set frequency are irradiated onto the sealant 22 from the surface of the decorative material 30, the electromagnetic waves B pass through the decorative material 30 and are reflected by the sealant 22. The electromagnetic waves reflected by the sealant 22 (reflected waves C) contain a waveform of the set frequency, and therefore pass through the decorative material 30 and can be received. The reflected waves C received in this manner contain components corresponding to the presence or absence of a sealing abnormality (presence or absence of stagnant water and deterioration of the sealant 22), and therefore the presence or absence of a sealing abnormality can be determined based on the components of the reflected waves C. As a result, even if a decorative material 30 having a plurality of tiles arranged on the surface of the exterior wall base material 20A is provided, the presence or absence of a sealing abnormality can be accurately detected regardless of the surface shape, material, etc. of the decorative material 30.

[0080] As described above, the abnormality detection system 10 according to this embodiment can detect moisture (water droplets) remaining at the boundary between the joint tape 33 and the sealant 22 placed inside the exterior wall 20, as well as deterioration of the sealant 22, without removing the decorative material 30 from the exterior wall 20. This makes it possible to quantitatively diagnose deterioration inside the exterior wall 20, and ultimately enables early detection of defects and deterioration inside the exterior wall 20. This makes it possible to perform appropriate maintenance of the exterior wall 20.

[0081] Moreover, by moving the irradiation receiving device 3 along the decorative material 30, it is possible to inspect and diagnose all parts inside the exterior wall 20. Moreover, since it is not necessary to peel off the decorative material 30 from the exterior wall 20, it is possible to improve the safety of the inspection and shorten the inspection time. Furthermore, since electromagnetic waves B in the microwave range are used, it is possible to provide a highly safe inspection method.

[0082] As described above, the sealing abnormality detection method according to this embodiment includes the following steps: A sealing abnormality detection method for detecting a sealing abnormality including retention of moisture at the boundary between the joint tape 33 and the sealant 22 for an exterior wall 20 of a building having an exterior wall base material 20A in which a sealant 22 is arranged between siding boards 21, 21 and a decorative material 30 in which a joint tape 33 is arranged so as to cover the sealant 22, comprising: a frequency setting step (step S11 in FIG. 4) of setting a frequency of the electromagnetic wave B such that a component of the reflected wave C that changes depending on the presence or absence of moisture remaining at the boundary between the joint tape 33 and the sealant 22 can be detected from the reflected wave C reflected by the sealant 22, the component of the reflected wave C being set to a frequency of the electromagnetic wave B; an irradiation and reception process (step S12) of irradiating the electromagnetic wave B of the set frequency onto the sealing material 22 from the surface of the decorative material 30 in the exterior wall 20 of the building and receiving the reflected wave C reflected by the sealing material 22; an anomaly detection step (step S15) of detecting the sealing anomaly based on the component of the reflected wave C; It is equipped with the following.

[0083] With this configuration, sealing abnormalities such as moisture remaining at the boundary between the joint tape 33 placed inside the exterior wall 20 and the sealant 22 can be detected.

[0084] Furthermore, the component of the reflected wave C is either the amplitude ratio of the reflected wave C to the amplitude of the electromagnetic wave B at the set frequency, or the phase difference of the reflected wave C to the electromagnetic wave B at the set frequency.

[0085] This configuration can improve the accuracy of detecting sealing abnormalities.

[0086] The component of the reflected wave C is either a real part or an imaginary part obtained by complex transforming the amplitude ratio and the phase difference.

[0087] This configuration can improve the accuracy of detecting sealing abnormalities.

[0088] In addition, in the frequency setting step, a first frequency group (e.g., 9.2±0.2 GHz, 10.4±0.2 GHz, 11.2±0.2 GHz) is set, which is the frequency of the electromagnetic wave B at which a component of the reflected wave C that changes depending on the presence or absence of the stagnant moisture can be detected, In the irradiation and reception step, the electromagnetic wave B of the first frequency group is irradiated, and the reflected wave C reflected by the sealing material 22 is received. In the anomaly detection process, the sealing anomaly is detected by extracting the areas where the moisture is accumulating and the areas where it is not accumulating based on the components of the reflected wave C (for example, the imaginary part of 9.2±0.2 GHz, the real part of 10.4±0.2 GHz, and the imaginary part of 11.2±0.2 GHz).

[0089] With this configuration, moisture remaining at the boundary between the joint tape 33 and the sealing material 22 can be detected.

[0090] In addition, in the frequency setting step, a second frequency group (e.g., 8.0±0.2 GHz) is set, which is the frequency of the electromagnetic wave B at which a component of the reflected wave C that changes depending on the presence or absence of the moisture and the deterioration of the sealing material 22 can be detected; In the irradiation and reception step, the electromagnetic wave B of the second frequency group is irradiated and the reflected wave C reflected by the sealing material 22 is received. In the abnormality detection process, the sealing abnormality is detected by extracting the areas where the moisture is stagnating, the areas where the sealing material 22 is deteriorated, and the areas where the sealing material 22 is not deteriorated based on the components of the reflected wave C (for example, the imaginary part of 8.0±0.2 GHz).

[0091] With this configuration, it is possible to detect the accumulation of moisture at the boundary between the joint tape 33 and the sealant 22 and the deterioration of the sealant 22.

[0092] In addition, in the frequency setting step, a third frequency group (e.g., 9.2±0.2 GHz, 11.2±0.2 GHz, 11.6±0.2 GHz) is set, which is the frequency of the electromagnetic wave B at which a component of the reflected wave C that changes depending on the presence or absence of the moisture and the deterioration of the sealing material 22 can be detected, In the irradiation and reception step, the electromagnetic wave B of the third frequency group is irradiated and the reflected wave C reflected by the sealing material is received; In the abnormality detection process, the sealing abnormality is detected by extracting the parts where the moisture is stagnating or the parts where the sealing material 22 has deteriorated, and the parts where the sealing material 22 has not deteriorated, based on the components of the reflected wave C (for example, the real part of 9.2±0.2 GHz, the real part of 11.2±0.2 GHz, and the imaginary part of 11.6±0.2 GHz).

[0093] With this configuration, it is possible to detect areas where an abnormality in the sealing portion (such as moisture accumulation at the boundary between the joint tape 33 and the sealing material 22, or deterioration of the sealing material 22) has occurred and areas where an abnormality in the sealing portion has not occurred.

[0094] Furthermore, the anomaly detection system 10 according to this embodiment includes: A sealing abnormality detection system for detecting sealing abnormalities, including retention of moisture at the boundary between the joint tape 33 and the sealant 22, for an exterior wall 20 of a building having an exterior wall substrate 20A in which a sealant 22 is arranged between siding boards 21, 21, and a decorative material 30 in which a joint tape 33 is arranged so as to cover the sealant 22, an irradiation / reception device 3 that irradiates electromagnetic waves B onto the sealant 22 from the surface of the decorative material 30, receives reflected waves C reflected by the sealant 22, and has a frequency of the electromagnetic waves B set so that a component of the reflected waves C that changes depending on whether or not moisture remains at the boundary between the joint tape 33 and the sealant 22 can be detected; a calculation device 4 for performing calculations to detect the sealing abnormality, The arithmetic unit 4 The sealing abnormality is detected based on the component of the reflected wave C received from the irradiation receiving device 3.

[0095] With this configuration, sealing abnormalities such as moisture remaining at the boundary between the joint tape 33 placed inside the exterior wall 20 and the sealant 22 can be detected.

[0096] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0097] For example, the frequency values ​​shown as the first frequency group, the second frequency group, and the third frequency group in this embodiment are merely examples, and are set appropriately depending on the specifications of the exterior wall 20, etc.

[0098] In addition, in this embodiment, the position of the sealing material 22 is specified from the design drawings or the like of the exterior wall 20, but if the design drawings or the like are not available, the position of the sealing material 22 may be specified by transmitting and receiving the electromagnetic waves B by the irradiation receiving device 3. This will be specifically explained below.

[0099] The irradiation receiving device 3 irradiates electromagnetic waves B that pass through the decorative material 30 and reach the siding board 21 and the sealing material 22, and multiple frequencies (position detection frequencies) of the electromagnetic waves B are set at which reflected waves C reflected by the siding board 21 and the sealing material 22 can be detected. These multiple frequencies are a group of frequencies at which the siding board 21 and the sealing material 22 can be distinguished, and these frequencies of the electromagnetic waves B can be set in advance by experimentation or the like.

[0100] The frequency band to be set is preferably in the range of, for example, 7.0 GHz to 12.0 GHz, and multiple different frequencies can be set within this frequency band. For example, the frequency group for position detection is five frequencies: (8) 8.4±0.2 GHz, (9) 9.2±0.2 GHz, (10) 10.4±0.2 GHz, (11) 10.8±0.2 GHz, and (12) 11.2±0.2 GHz.

[0101] For example, when irradiating electromagnetic waves B having the five frequencies (8) to (12) for position detection described above, the calculation device 4 uses (8) the imaginary part of 8.4±0.2 GHz, (9) the imaginary part of 9.2±0.2 GHz, (10) the real and imaginary parts of 10.4±0.2 GHz, (11) the real and imaginary parts of 10.8±0.2 GHz, and (12) the imaginary part of 11.2±0.2 GHz as identification data. By using these identification data, the position of the sealing material 22 can be identified. [Explanation of symbols]

[0102] 3. Irradiation receiving device 4 Arithmetic unit 10 Anomaly Detection System 20 Exterior Wall 20A Exterior wall base material 21 Siding Board 22 Sealant 30 Cosmetic materials 33 Joint Tape

Claims

1. A sealing abnormality detection method for detecting sealing abnormalities, including retention of moisture at the boundary between a joint tape and a sealant, for an exterior wall of a building having an exterior wall base material in which a sealant is placed between siding boards and a decorative material in which a joint tape is placed so as to cover the sealant, comprising: a frequency setting step of preparing a test specimen of the exterior wall, irradiating electromagnetic waves from the surface of the decorative material to the sealant in the test specimen, and setting a frequency of the electromagnetic waves that enables detection of a component of the reflected wave that changes depending on the presence or absence of moisture remaining at the boundary between the joint tape and the sealant from the reflected wave reflected by the sealant; an irradiation and reception process of irradiating the electromagnetic wave of the set frequency from the surface of the decorative material to the sealant on the exterior wall of the building and receiving the reflected wave reflected by the sealant; an anomaly detection step of detecting the sealing anomaly based on the component of the reflected wave; Equipped with Sealing anomaly detection method.

2. The component of the reflected wave is either an amplitude ratio of the reflected wave to the amplitude of the electromagnetic wave at the set frequency or a phase difference of the reflected wave to the electromagnetic wave at the set frequency. The sealing abnormality detection method according to claim 1 .

3. The component of the reflected wave is either a real part or an imaginary part obtained by complex transforming the amplitude ratio and the phase difference. The sealing abnormality detection method according to claim 2.

4. In the frequency setting step, a first frequency group is set, which is a frequency of the electromagnetic wave at which a component of the reflected wave that changes depending on whether or not the moisture is retained can be detected; In the irradiation and reception step, the electromagnetic waves of the first frequency group are irradiated and the reflected waves reflected by the sealing material are received. In the anomaly detection step, the sealing anomaly is detected by extracting the portion where the moisture is accumulating and the portion where the moisture is not accumulating based on the component of the reflected wave. The sealing abnormality detection method according to any one of claims 1 to 3.

5. In the frequency setting step, a second frequency group is set, which is the frequency of the electromagnetic wave at which the component of the reflected wave that changes depending on the presence or absence of the moisture and the deterioration of the sealing material can be detected; In the irradiation and reception step, the electromagnetic waves of the second frequency group are irradiated and the reflected waves reflected by the sealing material are received. In the abnormality detection step, the sealing abnormality is detected by extracting the portion where the moisture is accumulating, the portion where the sealing material is deteriorated, and the portion where the sealing material is not deteriorated based on the components of the reflected wave. The sealing abnormality detection method according to any one of claims 1 to 3.

6. In the frequency setting step, a third frequency group is set, which is the frequency of the electromagnetic wave at which the component of the reflected wave that changes depending on the presence or absence of the moisture and the deterioration of the sealing material can be detected; In the irradiation and reception step, the electromagnetic waves of the third frequency group are irradiated and the reflected waves reflected by the sealing material are received. In the abnormality detection step, the sealing abnormality is detected by extracting the portion where the moisture is accumulating or the portion where the sealing material is deteriorated and the portion where the sealing material is not deteriorated based on the component of the reflected wave. The sealing abnormality detection method according to any one of claims 1 to 3.

7. A sealing abnormality detection system for detecting sealing abnormalities, including retention of moisture at the boundary between a joint tape and a sealant, for an exterior wall of a building having an exterior wall base material in which a sealant is placed between siding boards and a decorative material in which a joint tape is placed so as to cover the sealant, an irradiation / reception device that irradiates electromagnetic waves from the surface of the decorative material onto the sealant, receives the waves reflected by the sealant, and has a frequency of the electromagnetic waves set so that the component of the reflected waves that changes depending on whether or not moisture remains at the boundary between the joint tape and the sealant can be detected; a computing device that performs a calculation to detect the sealing abnormality, The computing device detecting the sealing abnormality based on the component of the reflected wave received from the irradiation receiving device; Sealing abnormality detection system.

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