JP2019020323A - Repairing member, repairing structure, and method for detecting damages - Google Patents

Abstract

To provide a repairing member, a repairing structure, and a method for detecting damages that can accurately detect damages generated in a repairing member and a repairing target member.SOLUTION: The repairing structure 1 includes: an outer plate 2 with an opening; and a plate-like repairing member 4, fixed to the outer plate 2 to cover the opening. The repairing member 4 includes a recess part 11 located in the contact surface 4c side in contact with the outer plate 2, and the recess part 11 contains an ultrasonic wave probe 7. The ultrasonic wave probe 7 is arranged to be in contact with the repairing member 4 and the outer plate 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a repair member, a repair structure, and a damage detection method.

  If the outer skin of the aircraft (member to be repaired) is damaged, the damaged part is removed by removing the damaged part and fixing the plate-like repairing member to cover the removed part. There is a way to close the part. The repair member is formed larger than the removal portion formed on the member to be repaired, covers the removal portion in the central region of the repair member, and is placed so that the end region of the repair member overlaps the adjacent region of the removal portion. The Then, the repair member and the repair target member are fixed by fastening the part where the repair member is placed on the repair target member.

When such a repair method is performed, in the portion where the repair member and the repair target member overlap, the lower surface of the repair member, the upper surface of the repair target member, etc. (that is, the surface where the repair member and the repair target member are in contact) Etc.), damage such as corrosion and cracks that are not visible from the outside may be difficult to detect.
In order to detect damage that cannot be visually recognized from the outside, such as a surface where the repair member and the repair target member are in contact, it is conceivable to use a sensor or the like that detects the damage. There exists a thing like patent document 1 as a repair member which has such a sensor.

  Patent Document 1 discloses a configuration in which a plurality of strain sensors are embedded in a patch fixed to an area on the surface of a structural member. This strain sensor monitors changes in strain in the area covered by the patch.

International Publication No. 1995/014917

  However, since the patch of Patent Document 1 monitors the change in strain in the area covered with the patch, it cannot detect damage (for example, corrosion thinning, minute cracks, etc.) that does not cause the change in strain. there is a possibility.

  The present invention has been made in view of such circumstances, and provides a repair member, a repair structure, and a damage detection method capable of accurately detecting damage generated in a repair member and a repair target member. Objective.

In order to solve the above problems, the repair member, repair structure, and damage detection method of the present invention employ the following means.
The repair member which concerns on 1 aspect of this invention is a plate-shaped repair member which is fixed to the repair object member, and covers the opening formed in the said repair object member, Comprising: One surface of the said repair member which contacts the said repair object member The ultrasonic probe is arranged on the side, and the ultrasonic probe has a repair member contact portion that contacts the one surface and a repair target member contact portion that can contact the repair target member.

In the said structure, the ultrasonic wave transmitted from the repair member contact part propagates the inside of a repair member. Thereby, damages such as corrosion and cracks inside the repair member can be detected.
Further, when the ultrasonic probe and the repair target member are in contact, the ultrasonic wave transmitted from the repair target member contact portion propagates inside the repair target member. Thereby, damage such as corrosion and cracks inside the member to be repaired can be detected.
Therefore, it is possible to detect damage to both the repair member and the repair target member by using only the ultrasonic probe disposed on the one surface side of the repair member. Moreover, since damage etc. are detected by ultrasonic waves, minute damage can also be detected.
Further, ultrasonic waves are propagated to each of the repair member and the repair target member without passing through other members. Thereby, the ultrasonic wave propagating through each member does not pass through the contact surface (interface) between the repair member and the repair target member. Therefore, attenuation of the propagating ultrasonic wave can be suppressed. Therefore, damage of each member can be detected with higher accuracy.
The ultrasonic probe may be in contact with the repair object or the repair member through oil or the like.

  In the repair member according to one aspect of the present invention, a plurality of the ultrasonic probes may be provided, and the plurality of ultrasonic probes may be arranged so as to surround the opening.

  In the region around the opening, damage is likely to occur due to stress concentration or the like. In the above configuration, since the plurality of ultrasonic probes are arranged so as to surround the opening, a region around the opening where damage is likely to occur may be set as a detection target region by the plurality of ultrasonic probes. it can. Therefore, it is possible to suitably detect damage that has occurred in the area around the opening.

  In the repair member according to one aspect of the present invention, the ultrasonic probe transmits ultrasonic waves in a direction inclined with respect to the one surface of the repair member from the repair member contact portion and the repair target member contact portion. A possible transmitting ultrasound probe may be included.

  In the above configuration, since the ultrasonic waves can be transmitted in the inclined direction, compared with the case where the ultrasonic waves are transmitted in the horizontal direction, the ultrasonic waves are widely distributed in the plate thickness direction with respect to the repair member and the repair target member. Can be sent. Moreover, compared with the case where ultrasonic waves are transmitted in the vertical direction, ultrasonic waves can be transmitted over a wide range in the in-plane direction with respect to the repair member and the repair target member.

  The repair member according to one aspect of the present invention has a recess formed in a concave shape on one surface side that contacts the repair target member, and the ultrasonic probe may be disposed inside the recess. Good.

  In the above configuration, since the concave portion is provided in the repair member and the ultrasonic probe is disposed in the concave portion, the ultrasonic probe can be used without performing processing for installing the ultrasonic probe on the repair target. The repair structure provided can be used. As described above, since the object to be repaired is not processed, the repair structure can be applied without reducing the strength or the like of the object to be repaired.

  The repair structure according to one aspect of the present invention includes a repair target member having an opening, a plate-shaped repair member fixed to the repair target member and covering the opening, and a repair member contact that contacts the repair target member. And an ultrasonic probe arranged on a contact surface between the repair target member and the repair member.

In the said structure, the ultrasonic wave transmitted from the repair member contact part propagates the inside of a repair member. Thereby, damages such as corrosion and cracks inside the repair member can be detected.
Moreover, the ultrasonic wave transmitted from the repair target member contact portion propagates inside the repair target member. Thereby, damage such as corrosion and cracks inside the member to be repaired can be detected.
Therefore, it is possible to detect damage to both the repair member and the repair target member only by the ultrasonic probe disposed on the contact surface between the repair target member and the repair member. Moreover, since damage etc. are detected by ultrasonic waves, minute damage can also be detected.
Further, ultrasonic waves are propagated to each of the repair member and the repair target member without passing through other members. Thereby, the ultrasonic wave propagating through each member does not pass through the contact surface (interface) between the repair member and the repair target member. Therefore, attenuation of the propagating ultrasonic wave can be suppressed. Therefore, damage of each member can be detected with higher accuracy.
The ultrasonic probe may be in contact with the repair object or the repair member through oil or the like.

  In the repair structure according to one aspect of the present invention, the repair member has a concave portion formed in a concave shape on one surface side in contact with the member to be repaired, and the ultrasonic probe is disposed inside the concave portion. It may be arranged.

In the above configuration, since the concave portion is provided in the repair member and the ultrasonic probe is disposed in the concave portion, the ultrasonic probe can be used without performing processing for installing the ultrasonic probe on the repair target. The repair structure provided can be used. As described above, since the object to be repaired is not processed, the repair structure can be applied without reducing the strength or the like of the object to be repaired.
In addition, since the ultrasonic probe is provided on the repair member side, for example, if an ultrasonic probe is provided on the repair member in advance in a factory, the ultrasonic probe is installed at the repair site. Work can be omitted. Therefore, it is possible to reduce the work process at the site.

  A damage detection method according to an aspect of the present invention is a damage detection method using the above-described repair member, based on a step of transmitting an ultrasonic wave from the ultrasonic probe, and a transmission / reception state of the ultrasonic wave Detecting damage to at least one of the repair member and the repair target member.

  The damage detection method according to an aspect of the present invention includes a step of transmitting the ultrasonic wave from an ultrasonic probe in the above-described repair structure, and the repair member and the repair based on a transmission / reception state of the ultrasonic wave Detecting damage to at least one of the target members.

  ADVANTAGE OF THE INVENTION According to this invention, the damage which generate | occur | produced in the repair member and the member for repair can be detected accurately.

It is a figure which shows the repair structure which concerns on embodiment of this invention. (A) is a top view of repair structure, (B) is BB arrow sectional drawing of (A). It is typical sectional drawing of the principal part of the repair structure shown in FIG. 1, Comprising: (A) is a figure which shows the case where damage generate | occur | produced on the repair member side, (B) has generate | occur | produced damage on the repair object member side FIG. FIGS. 2A and 2B are schematic plan views showing the repair structure shown in FIG. 1, wherein FIG. 2A shows a case where no damage has occurred, and FIG. 2B shows a case where damage has occurred. . It is a typical top view which shows the modification of the repair structure shown in FIG. 1, Comprising: (A) is a figure which shows the case where damage has not generate | occur | produced, (B) shows the case where damage has occurred FIG. It is a typical top view which shows the modification of the repair structure shown in FIG. It is sectional drawing which shows the conventional repair structure.

Hereinafter, an embodiment of a repair member, a repair structure, and a damage detection method according to the present invention will be described with reference to the drawings.
The repair structure 1 is applied, for example, when repairing the damaged part when a metal plate or the like is damaged. This embodiment demonstrates the case where damage (for example, corrosion and a crack) generate | occur | produces in the outer plate | board 2 of an aircraft. In this embodiment, in order to perform repair by cutting out the damaged portion, the opening 3 is formed in the outer plate.

  The repair structure 1 according to the present embodiment includes an outer plate (a member to be repaired) 2 having an opening 3 formed by cutting a damaged portion, and a repair member 4 that covers the entire opening 3 from the outer side of the outer plate 2. The ultrasonic probe 7 is provided so as to be embedded in the repair member 4, and the fastener 5 and the collar 6 that fix the outer plate 2 and the repair member 4 are provided.

  The outer plate 2 is formed of a metal such as an aluminum alloy, and forms an internal space 8 in the aircraft. An opening 3 is formed in the outer plate 2 by cutting a damaged portion. The opening 3 is formed in a substantially square shape, and is formed so that the four corners are curved so that stress is not concentrated on the four corners. Further, the opening 3 is formed relatively large with respect to the damaged portion so that there is no fear of remaining damage such as cracks generated in the outer plate 2. In the peripheral region of the opening 3 of the outer plate 2, a plurality of fastener holes 2a penetrating the outer plate 2 are formed. The plurality of fastener holes 2 a are arranged at equal intervals so as to be parallel to the edges forming the four sides of the opening 3.

  The repair member 4 is a substantially square metal plate-shaped member, and includes an exposed surface 4b exposed to the outside and a contact surface 4c that is on the opposite side of the exposed surface 4b and contacts the outer plate 2. Have. The repair member 4 is formed larger than the opening 3 and is fixed to the outer plate 2 so as to cover the entire opening 3. That is, the repair member 4 has a central portion that is a region covering the opening 3 and a fixed portion that is a region surrounding the central portion and is fixed to the outer plate 2, and the contact surface 4 c in the fixed portion is the outer plate 2. In contact with. The repair member 4 is formed relatively large with respect to the opening 3 so that there is no risk of cracks from the opening 3.

A plurality of fastener holes 4a are formed in the fixed portion. The plurality of fastener holes 4a are formed at positions corresponding to the plurality of fastener holes 2a formed in the outer plate 2, respectively. The fastener hole 2 a formed in the outer plate 2 and the fastener hole 4 a formed in the repair member 4 communicate with each other to form a fastener through hole 10. That is, the fastener through-hole 10 is a hole that penetrates the repair member 4 and the outer plate 2, and a plurality of fastener through-holes 10 are formed. The fastener 5 is inserted through each of the plurality of fastener through holes 10. The outer plate 2 and the repair member 4 are fixed by inserting the fastener 5 into each of the plurality of fastener through holes 10.
A plurality of recesses 11 that are recessed toward the exposed surface 4b are formed on the contact surface 4c in the fixed portion. In the present embodiment, as shown in FIG. 1, recesses 11 are formed in the vicinity of the four corners of the opening 3 and at a predetermined distance from the fastener hole 4 a. That is, four recesses 11 are formed so as to surround the opening 3. Each recess 11 has a columnar side surface 11a extending perpendicularly from the contact surface 4c in the direction of the exposed surface 4b, and a bottom surface 11b extending from the end of the side surface 11a on the exposed surface 4b side in a direction parallel to the contact surface 4c. .

  The ultrasonic probe 7 according to the present embodiment includes a transmission ultrasonic probe 7t that transmits ultrasonic waves and a reception ultrasonic probe that receives the ultrasonic waves transmitted by the transmission ultrasonic probe 7t. There are two types of child 7r. Any of the ultrasonic probes 7 is disposed inside a recess 11 formed in the repair member 4. In one recess 11, either the transmission ultrasonic probe 7 t or the reception ultrasonic probe 7 r is arranged. In the present embodiment, the same type of ultrasonic probe 7 is not disposed in the recesses 11 adjacent to each other along the opening 3. That is, the transmission ultrasonic probe 7 t and the reception ultrasonic probe 7 r are alternately arranged along the opening 3.

  The transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r are disk-shaped members having a thickness of 1 to 2 mm and a diameter of 5 to 6 mm, and one of the circular surfaces ( The repair member contact portion 7a is disposed in the recess 11 so as to come into contact with the bottom surface 11b of the recess 11. At the same time, the circular other surface (repair target member contact portion) 7 b is arranged in the recess 11 so as to be flush with the contact surface 4 c of the repair member 4. That is, when the outer plate 2 and the repair member 4 come into contact with each other, the other surface 7b of the ultrasonic probe 7 (the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r) also comes into contact with the outer plate 2. . Note that the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r may be in contact with the bottom surface of the recess 11 via oil or the like without being in direct contact with each other. Further, the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r may be in contact with the outer plate 2 via oil or the like instead of being in direct contact.

  Signal lines (not shown) are connected to the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r. The signal line connects the transmitting ultrasonic probe 7t or the receiving ultrasonic probe 7r and a control device (not shown) disposed in the internal space 8 of the aircraft. The transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r transmit and receive signals to and from the control device via this signal line. When an ultrasonic transmission command signal is transmitted from the control device to the transmission ultrasonic probe 7t via the signal line, an ultrasonic wave is transmitted from the transmission ultrasonic probe 7t. When the reception ultrasonic probe 7r receives the ultrasonic wave, a signal is transmitted to the control device via the signal line. The signal line extends to the internal space 8 of the aircraft through a signal line insertion hole formed in the outer plate 2 and is connected to the control device.

  The transmitting ultrasonic probe 7t is for transmitting ultrasonic waves toward the inside of the outer plate 2 and the repair member 4 to be inspected, and a high voltage (the above-mentioned super An ultrasonic wave is transmitted by applying a sound wave transmission command signal. In the present embodiment, the transmitting ultrasonic probe 7t transmits ultrasonic waves from one surface 7a of the transmitting ultrasonic probe 7t in a direction inclined with respect to the one surface 7a, as shown in FIG. . The ultrasonic wave transmitted from the one surface 7a propagates inside the repair member. The transmitting ultrasonic probe 7t transmits ultrasonic waves from the other surface 7b of the transmitting ultrasonic probe 7t in a direction inclined with respect to the other surface 7b. The ultrasonic wave transmitted from the other surface 7 b propagates inside the outer plate 2. The receiving ultrasonic probe 7r is for receiving the ultrasonic wave transmitted from the transmitting ultrasonic probe 7t, and is configured to measure the voltage at both ends of the receiving ultrasonic probe 7r. Measure the reception status.

  The control device includes, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), and a computer-readable storage medium. A series of processes for realizing various functions is stored in a storage medium or the like in the form of a program as an example, and the CPU reads the program into a RAM or the like to execute information processing / arithmetic processing. As a result, various functions are realized. The program is preinstalled in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or distributed via wired or wireless communication means. Etc. may be applied. The computer-readable storage medium is a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like.

  A plurality of fasteners 5 are provided, and are inserted through the plurality of fastener through holes 10 formed as shown in FIG. Further, as shown in FIG. 2, each fastener 5 has a substantially truncated cone-shaped head portion 5a and a columnar shaft portion 5b extending in a predetermined direction from one end of the head portion 5a. The entire head 5 a is disposed in a fastener hole 4 a formed in the repair member 4 so as not to protrude from the exposed surface 4 b of the repair member 4. The front end of the shaft portion 5b is provided so as to protrude from the outer plate 2 into the inner space 8, and the outer plate 2 and the repair member 4 are fixed by engaging the annular collar 6 with the protruding portion 5c. .

Next, a repair method of the outer plate 2 to which the repair structure 1 according to the present embodiment is applied will be described.
First, an opening 3 is formed in the outer plate 2 by cutting a damaged portion generated in the outer plate 2 and a region adjacent to the damaged portion with a processing device (not shown). At this time, the opening 3 is formed relatively large with respect to the damaged portion so that there is no fear of remaining damage. Next, the repair member 4 is arranged with respect to the outer plate 2 so as to cover the opening 3 from the outside. At this time, since the concave portion 11 is formed in the repair member 4 in advance in a factory or the like, and the ultrasonic probe 7 is installed inside the concave portion 11, the ultrasonic probe 7 is installed at the repair site. Do not install. Next, the fastener 5 is inserted into the fastener through hole 10 formed in the outer plate 2 and the repair member 4, the protruding portion 5 c of the fastener 5 is engaged with the collar 6, and the outer plate 2 and the repair member 4 are fixed. To do. In addition, when the repair member 4 is disposed on the outer plate 2, a sealant may be applied to a surface where the repair member 4 and the outer plate 2 are in contact with each other.

Next, a damage detection method using the repair structure 1 according to this embodiment will be described with reference to FIGS. In FIGS. 2 and 3, black arrows schematically show ultrasonic waves. In this embodiment, damage is detected using a so-called transmission type damage detection method.
As shown in FIG. 2, the transmission ultrasonic probe 7t disposed in the recess 11 of the repair member 4 is inclined from the one surface 7a of the transmission ultrasonic probe 7t to the one surface 7a. Send ultrasound. That is, the ultrasonic wave transmitted from the one surface 7 a of the transmitting ultrasonic probe 7 t propagates inside the repair member 4. At the same time, the transmission ultrasonic probe 7t transmits ultrasonic waves from the other surface 7b of the transmission ultrasonic probe 7t in a direction inclined with respect to the other surface 7b. That is, the ultrasonic wave transmitted from the other surface 7 b of the transmitting ultrasonic probe 7 t propagates inside the outer plate 2.
The ultrasonic wave propagating through the repair member 4 and the outer plate 2 is received by the receiving ultrasonic probe 7r. The reception ultrasonic probe 7r transmits a reception state to the control unit when receiving the ultrasonic wave.

As shown in FIG. 3A, when the repair member 4 and the outer plate 2 are not damaged, the ultrasonic wave transmitted from the transmitting ultrasonic probe 7t is received without being blocked by the damage. Is received by the ultrasonic probe 7r.
On the other hand, as shown in FIGS. 2 (A) and 3 (B), in the repair member 4, damage D such as cracks is generated between the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r. If present, a part of the ultrasonic wave propagating inside the repair member 4 is blocked by the damage D. The blocked ultrasonic wave does not reach the reception ultrasonic probe 7r. Further, as shown in FIGS. 2B and 3B, in the outer plate 2, there is damage D between the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r. If so, the ultrasonic wave propagating inside the outer plate 2 is blocked by the damage D. The blocked ultrasonic wave does not reach the reception ultrasonic probe 7r.

As described above, in the case where the damage D exists between the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r in either the repair member 4 or the outer plate 2, the damage D As a result, at least a part of the ultrasonic wave is blocked, so that the received ultrasonic probe 7r does not receive the blocked ultrasonic wave. Thereby, when the damage D is present, the transmission / reception state of the ultrasonic wave received by the reception ultrasonic probe 7r is different from that when no damage is present.
Accordingly, when the transmission / reception state information transmitted to the control unit is different from the case where there is no damage between the transmission ultrasonic probe 7t and the reception ultrasonic probe 7r. It can be determined that there is damage between the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r in either the repair member 4 or the outer plate 2. Therefore, damage can be detected.
In addition, as a transmission / reception state when damage does not exist, the transmission / reception state acquired in the state which can ensure soundness, for example at the time of manufacture of the repair member 4 and the outer plate | board 2, and completion of repair, can be used.

  This damage detection method may be performed while the aircraft is operating or may be performed while the aircraft is stopped. Moreover, it may be performed constantly or automatically every predetermined time. For example, it may be performed at a specific time such as maintenance.

According to this embodiment, there exist the following effects.
Damage to both the repair member 4 and the outer plate 2 can be detected only by the ultrasonic probe 7 disposed on the contact surface 4 c side of the repair member 4. Moreover, since damage etc. are detected by ultrasonic waves, minute damage can also be detected.

As a method of detecting damage to the repair member 4 and the outer plate 2 with an ultrasonic probe, a method of installing the ultrasonic probe 20a on the exposed surface 4b of the repair member 4 as shown by reference numeral 20a in FIG. Is also possible. However, in this method, when an ultrasonic wave is transmitted to the outer plate 2, the transmitted ultrasonic wave passes through the repair member 4 and further passes through the interface between the repair member 4 and the outer plate 2. . As described above, since many members and interfaces are passed, there is a possibility that the ultrasonic waves are attenuated and the damage cannot be suitably detected.
Further, as a method of detecting damage to the outer plate 2 with the ultrasonic probe, as shown by a reference numeral 20b in FIG. 6, the ultrasonic probe 20b is installed on the surface of the outer plate 2 on the inner space 8 side. A method is also conceivable. However, since the surface of the outer plate 2 on the inner space 8 side is a surface that defines the inner space 8 of the aircraft, various members, devices, and the like are installed on the surface of the outer plate 2 on the inner space 8 side. Yes. Specifically, when the outer plate 2 constitutes the fuselage portion of the aircraft, the interior side is provided on the surface on the inner space 8 side, and when the outer plate 2 constitutes the wing portion of the aircraft, A fuel seal or the like is applied to the surface on the inner space 8 side. Therefore, there is a possibility that an ultrasonic probe cannot be suitably installed on the surface of the outer plate 2 on the inner space 8 side. Further, since the surface of the outer plate 2 on the inner space 8 side cannot be accessed at a narrow portion such as the tip of the wing portion of the aircraft, the ultrasonic probe cannot be installed.

On the other hand, in this embodiment, ultrasonic waves are directly propagated to each of the repair member 4 and the outer plate 2 without passing through other members. Thereby, the ultrasonic wave that propagates through each member and detects the presence or absence of damage does not pass through the contact surface (interface) between the repair member 4 and the outer plate 2. Therefore, attenuation of the propagating ultrasonic wave can be suppressed. Therefore, damage of each member can be detected with higher accuracy. In particular, damage to the outer plate 2 can be detected with higher accuracy compared to a configuration in which an ultrasonic probe is provided on the exposed surface side (see FIG. 6).
Further, since it is possible to detect damage to both the repair member 4 and the outer plate 2 only by the ultrasonic probe 7 disposed on the contact surface 4c side of the repair member 4, the internal space 8 of the outer plate 2 can be detected. Damage to the repair member 4 and the outer plate 2 can be detected without providing an ultrasonic probe on the side surface.

  In the region around the opening 3, damage is likely to occur due to stress concentration or the like. In the present embodiment, since the plurality of ultrasonic probes 7 are arranged so as to surround the opening 3, an area around the opening 3 where damage is likely to occur is detected by the plurality of ultrasonic probes 7. Can be an area. Therefore, it is possible to more suitably detect damage that has occurred in the area around the opening 3.

  Further, since the ultrasonic waves are transmitted in the inclined direction, the ultrasonic waves are transmitted in a wide range in the thickness direction with respect to the repair member 5 and the outer plate 2 as compared with the case of transmitting the ultrasonic waves in the horizontal direction. Can do. Moreover, compared with the case where an ultrasonic wave is transmitted in the vertical direction, the ultrasonic wave can be transmitted over a wide range in the in-plane direction with respect to the repair member 5 and the outer plate 2.

In the present embodiment, the repair member 4 is provided with the concave portion 11 and the ultrasonic probe 7 is disposed in the concave portion 11, so that the ultrasonic probe is applied to the outer plate 2 that is a member constituting the aircraft. The repair structure 1 provided with the ultrasonic probe 7 can be provided without performing processing for installing the touch element 7. As described above, since the outer plate 2 is not processed, the repair structure 1 can be applied without reducing the strength or the like of the outer plate 2.
In addition, since the ultrasonic probe 7 is provided in the repair member 4 in advance in a factory or the like, the work of installing the ultrasonic probe 7 can be omitted at the site where the repair is performed. Therefore, it is possible to reduce the work process at the site.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably.

For example, in the above-described embodiment, an ultrasonic probe that transmits ultrasonic waves (transmitting ultrasonic probe 7t) and an ultrasonic probe that receives ultrasonic waves (receiving ultrasonic probe 7r). However, it is also possible to detect damage using a so-called reflection-type damage detection method using the transmission / reception ultrasonic probe 7tr that can perform both transmission and reception of ultrasonic waves. .
In this example, as shown in FIG. 4A, when there is no damage, the ultrasonic wave transmitted from the transmission / reception ultrasonic probe 7tr continues to proceed as it is, so the transmission / reception ultrasonic probe 7tr. Does not receive ultrasound. On the other hand, as shown in FIG. 4B, when there is damage around the transmitting / receiving ultrasonic probe 7tr, the transmitted ultrasonic waves are reflected by the damage, and the reflected ultrasonic waves are transmitted / received ultrasonic waves. The probe 7tr receives it. Therefore, when the transmitting / receiving ultrasonic probe 7tr receives the ultrasonic wave, it can be determined that there is damage.

Further, the position where the ultrasonic probe 7 is provided is not limited to the example of the above embodiment. If it is a place which wants to detect damage when damage occurs, it may be anywhere. For example, in the above embodiment, the example in which the ultrasonic probes 7 are arranged one by one at the four corners of the opening 3 has been described, but the arrangement of the ultrasonic probes 7 is not limited to this. For example, as shown in FIG. 5, one transmitting ultrasonic probe 7 t and one receiving ultrasonic probe 7 r may be arranged at each of the four corners of the opening 3. In this case, the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r are arranged so as to sandwich the corner of the opening 3. Specifically, the imaginary line L1 connecting the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r is disposed so as to pass near the corner.
In this way, by arranging the transmitting ultrasonic probe 7t and the receiving ultrasonic probe 7r, the opening 3 that is particularly susceptible to damage due to stress concentration or the like in the region around the opening 3 is provided. The vicinity of the four corners can be set as the detection target region. Therefore, it is possible to more suitably detect damage that has occurred in the area near the four corners of the opening 3.

  In the above-described embodiment, an example in which one ultrasonic probe 7 is arranged for each concave portion 11 has been described. However, two ultrasonic probes may be arranged for each concave portion 11. In this case, the ultrasonic probe that contacts the bottom surface 11b of the concave portion 11 of the repair member, and the outer plate are arranged by overlapping the circular surfaces of the two ultrasonic probes in the concave portion 11. The ultrasonic probe in contact with 2 can be a different ultrasonic probe. As described above, when the ultrasonic probe in contact with the repair member 4 and the ultrasonic probe in contact with the outer plate 2 are used as different ultrasonic probes, It can be determined whether damage has occurred in the repair member 4 or the outer plate 2.

  Further, the connection path of the signal line is not limited to the path of the above embodiment. For example, a signal line groove may be formed in the fastener hole 2a formed in the outer plate 2, and the signal line may be passed through the groove. Specifically, in the section from the ultrasonic probe 7 to the fastener hole 2a, the signal line is sandwiched with the sealant between the outer plate 2 and the repair member 4, and the fastener hole 2a is formed in the fastener hole 2a. It may pass through the groove.

  In the above embodiment, the concave portion 11 is formed on the contact surface 4c of the repair member 4, and the ultrasonic probe 7 is disposed inside the concave portion 11. However, the ultrasonic probe 7 is disposed at this position. It is not limited to. A concave portion may be formed on the surface of the outer plate 2 that contacts the repair member 4, and the ultrasonic probe 7 may be disposed in the concave portion.

  Moreover, although the example which applies the repair structure 1 to the outer skin 2 of an aircraft was demonstrated in the said embodiment, the member (repair object member) used as the object of repair is not limited to the outer skin 2 of an aircraft. Moreover, although the said embodiment demonstrated the example made into a metal member as a member for repair, a member for repair is not limited to metal. For example, the member to be repaired may be a composite material or the like.

1 Repair structure 2 Outer plate (member to be repaired)
2a Fastener hole 3 Opening 4 Repair member 4a Fastener hole 4b Exposed surface 4c Contact surface 5 Fastener 6 Collar 7 Ultrasonic probe 7a One surface (repair member contact portion)
7b Other side (repair target member contact part)
7t Transmission ultrasonic probe 7r Reception ultrasonic probe 8 Internal space 10 Fastener through hole 11 Recess 11a Side surface 11b Bottom surface D Damage

Claims (8)

It is a plate-shaped repair member that is fixed to the repair target member and covers the opening formed in the repair target member,
An ultrasonic probe disposed on one surface side of the repair member in contact with the repair target member;
The ultrasonic probe is a repair member having a repair member contact portion that contacts the repair member and a repair target member contact portion that can contact the repair target member. A plurality of the ultrasonic probes are provided,
The repair member according to claim 1, wherein the plurality of ultrasonic probes are arranged so as to surround the opening.   The ultrasonic probe includes a transmission ultrasonic probe capable of transmitting ultrasonic waves in a direction inclined with respect to the one surface of the repair member from the repair member contact portion and the repair target member contact portion. The repair member according to claim 1 or claim 2. Having a concave portion formed in a concave shape on the one surface side in contact with the member to be repaired,
The repair member according to claim 1, wherein the ultrasonic probe is disposed inside the recess. A member to be repaired in which an opening is formed;
A plate-shaped repair member that is fixed to the repair target member and covers the opening;
An ultrasonic probe that has a repair member contact portion that contacts the repair member and a repair target member contact portion that contacts the repair target member, and is disposed on a contact surface between the repair target member and the repair member; A repair structure comprising The repair member has a concave portion formed in a concave shape on one surface side in contact with the repair target member,
The repair structure according to claim 5, wherein the ultrasonic probe is disposed inside the recess. A damage detection method using the repair member according to any one of claims 1 to 4,
Transmitting ultrasonic waves from the ultrasonic probe;
Detecting a damage of at least one of the repair member and the repair target member based on the transmission / reception state of the ultrasonic wave. In the repair structure according to claim 5 or claim 6,
Transmitting ultrasonic waves from the ultrasonic probe;
Detecting a damage of at least one of the repair member and the repair target member based on the transmission / reception state of the ultrasonic wave.

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