Adapter for non-destructive testing device using electromagnetic radiation

The adapter for non-destructive testing devices addresses the challenge of inspecting curved surfaces by using deformable contact elements and an optical isolation wall, ensuring accurate and damage-free alignment and reduced interference.

FR3141524B1Active Publication Date: 2025-10-31OFFICE NAT DETUDES & DE RECH AEROSPATIALES
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Patent Information

Application Number
FR2022011359
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-10-31
Publication Date
2025-10-31
Estimated Expiration
2042-10-31

AI Technical Summary

Technical Problem

Active thermography inspection devices face difficulties in effectively inspecting curved or convex surfaces due to the challenge of automatically aligning the device without causing damage.

Method used

An adapter for non-destructive testing devices featuring a deformable distal part with movable contact elements and an optical isolation wall, allowing the device to conform to the shape of the inspected part and minimize radiative exchange interference.

Benefits of technology

Enables automatic alignment of the device to curved surfaces without damage, enhancing inspection accuracy and reducing radiative interference.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

Adapter (1) for a non-destructive testing device using electromagnetic radiation, the adapter (1) comprising: - a proximal part (3) configured to be fixed to a testing device, and - a distal part (5) comprising a contact element (7) forming a free end and mounted movable relative to the proximal part (3) such that the distal part (5) deforms when a force is applied to the contact element (7), the contact element (7) being connected to the deformable part by a ball or pivot joint, the contact element (7) having a parallelepiped shape. Figure for the abbreviation: Fig. 1
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Description

Title of the invention: Adapter for non-destructive testing device using electromagnetic radiation technical field

[0001] This application relates generally to the field of non-destructive testing devices and methods using electromagnetic radiation, and in particular to non-destructive testing using active thermography. STATE OF THE ART

[0002] Active thermography inspection is a classic non-destructive testing technique. According to this technique, the part to be inspected is illuminated by a heat source, such as a flash lamp, and then the heat flux radiated by the part is acquired using a detector, such as an infrared camera. The heat diffusion within the part after illumination can thus be visualized. If the part has defects, visualizing the heat diffusion highlights local thermal contrasts and allows the presence of these defects to be detected. The radiant heat source can use different spectral ranges, such as the infrared or visible range.

[0003] Active thermography inspection devices have many drawbacks. While the part of these devices intended to be placed in contact with the workpiece is flat, the parts to be inspected generally have a curvature or a curve, as is the case for an aircraft fuselage with its convex profile or a petrochemical tank with its curved profile. This situation poses a difficulty because it is hard to automatically bring the device close to the part to be inspected, as the part may be damaged. Description of the invention

[0004] One objective of the present application is to remedy the aforementioned drawbacks by proposing an adapter for a non-destructive testing device using electromagnetic radiation, the adapter comprising:

[0005] - a proximal part configured to be fixed to a control device, and

[0006] - a distal part comprising a contact element forming a free end and mounted movable relative to the proximal part so that the distal part deforms when force is applied to the contact element.

[0007] Such an adapter is advantageously and optionally complemented by the following various features taken alone or in combination: - the contact element has rounded or chamfered edges; - a deformable member linked to the contact element so as to mount the element of mobile contact relative to the proximal part, the deformable part being preferably a compression spring, a single-acting cylinder or a double-acting cylinder; - the contact element is rigidly linked to the deformable part, the contact element having a spherical shape; - the contact element is linked to the deformable part by means of a ball joint or pivot joint, the contact element having a parallelepiped shape; - the contact element and the deformable part form a first assembly, the adapter comprising a plurality of assemblies; - the contact elements are arranged in pairs contiguous, two contiguous contact elements being directly linked by an elastic element; - the elastic element is a first elastic element, the two contiguous contact elements being further directly linked by a second elastic element, the first and second elastic elements being connected to the contact elements by a parallel assembly; - the adapter extends from the proximal to the distal part in an axial direction, the adapter being hollow so as to present a recess in the axial direction, the recess opening outside the adapter through the proximal and distal parts, the adapter comprising an optical isolation wall surrounding the recess, the wall comprising an outer part opaque to electromagnetic radiation, and an inner part reflective to electromagnetic radiation, the electromagnetic radiation being intended for use in non-destructive testing; and - the optical isolation wall is deformable, the wall preferably comprising a fabric, plastic, accordion-pleated parts or sections configured to fit together along the axial direction.

[0008] The invention also relates to a non-destructive testing system using electromagnetic radiation comprising

[0009] - a non-destructive testing device using electromagnetic radiation, the device comprising a radiation source and a radiation detector,

[0010] - an adapter such as has been presented above, the proximal part being ri securely attached to the non-destructive testing device.

[0011] The invention finally relates to a method for non-destructive testing of a part by radiation, comprising the following steps:

[0012] - bringing a contact element of a control system into contact with the part,

[0013] - application of a force on the contact element, and

[0014] - displacement of the contact element relative to the rest of the system under the action of the effort and deformation of the system according to the shape of the part.

[0015] Such a process is advantageously and optionally complemented by the following steps of emission through the control system of radiation towards the room, and of acquisition through the control system of a time-dependent heat diffusion response in the room. DESCRIPTION OF THE FIGURES

[0016] Other features and advantages of the invention will become apparent from the following description, which is purely illustrative and not limiting, and should be read in conjunction with the accompanying drawings on which:

[0017] [Fig.1] [Fig.1] is a schematic representation of an adapter according to one embodiment of the invention;

[0018] [Fig.2] [Fig.2] is a schematic representation of a part of the adapter shown in [Fig.1]; and

[0019] [Fig.3]

[0020] [Fig.4]

[0021] Figures 3 and 4 are schematic representations of a non-destructive testing system according to an embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] Non-destructive testing device using electromagnetic radiation

[0023] With reference to Figures 1, 3 and 4, a non-destructive testing device 22 by electromagnetic radiation comprises a radiation source 24 and a radiation detector 26.

[0024] The radiation source and the radiation detector are located in a housing of the device that is open to the outside. The housing has an opening 23 of the device. The radiation source and the radiation detector are oriented with respect to the opening 23 of the device. This orientation thus defines a front face of the device 22. The opening 23 is, for example, a flat surface perpendicular to a first direction, a direction which in Figures 1, 3 and 4 corresponds to an axial direction A.

[0025] The source 24 and the detector 26 are oriented towards the outside of the device 22.

[0026] A flash lamp, an incandescent lamp, a halogen lamp, a laser diode or an electrical resistor can be used as a radiation source 24.

[0027] The radiation source 24 is configured to emit radiation propagating in the first direction away from the device 22. The emitted radiation then passes through the opening 23.

[0028] An infrared camera, a visible camera or a detector of another spectral range can be used as a radiation detector 26.

[0029] The radiation detector 26 is configured to detect radiation propagating along the first direction as it approaches the device 22. The received radiation then passes through the opening 23. In particular, the detector 26 can be centered on the first direction.

[0030] The control device 22 can be of the active thermography or multispectral type.

[0031] The non-destructive testing device 22 also includes a casing 25 which covers the device except for the opening 23. The cover 25, which can be made of plastic or metal, blocks electromagnetic radiation that would otherwise reach the device outside of the opening 23.

[0032] The control device may include a cable passage 27 to supply the source 24 and the detector 26 and to transmit the information measured by the detector 26.

[0033] The cable passage 27 can be provided in the cover 25, for example at the rear of the device 22, i.e. opposite the front face of the device 22, the front face defined by the opening 23.

[0034] Preferably, the device takes a parallelepiped shape, with the opening taking a rectangular shape.

[0035] Adapter for non-destructive testing device using electromagnetic radiation genetics.

[0036] With reference to [Fig. 1], an adapter 1 for a non-destructive testing device using electromagnetic radiation comprises a proximal portion 3 configured to be attached to a non-destructive testing device 22 using electromagnetic radiation and a distal portion 5 configured to be in contact with a part to be inspected. The part to be inspected is not shown in the figures.

[0037] The adapter 1 extends along an axial direction A from the proximal part 3 to the distal part 5. In this way, when the proximal part 3 is fixed to a control device 22 and when the distal part 5 is brought into contact with a part to be controlled, the adapter is located between the control device 22 and the part to be controlled.

[0038] Preferably, the adapter takes a parallelepiped shape, the proximal part 3 having a rectangular shape in section orthogonal to the axial direction A. The proximal part 3 forms a rectangular frame which can be attached to the non-destructive testing device.

[0039] The adapter 1 can be hollow so as to have a recess 30 along the axial direction A. The recess 30 opens outwards from the adapter 1 through the proximal part 3 and through the distal part 5. In other words, the adapter 1 is traversed from one side to the other along the axial direction A by the recess 30.

[0040] By attaching the proximal part 3 to the non-destructive testing device 22, The recess 30 can be placed in line with the opening 23, the first direction and the axial direction A then coinciding. Radiation emitted by the source 24 along the first direction, or respectively radiation propagating along the first direction towards the detector 26, can thus pass through the adapter 1 after leaving the source 24, or respectively before reaching the detector 26.

[0041] The adapter 1 may also include an optical isolation wall 28 surrounding the recess 30. In this way, radiation arriving at the wall 28 would be stopped.

[0042] The wall 28 extends around the axial direction A from the proximal part 3 to the distal part 5. In this way, when the adapter 1 is hollow so as to present the recess 30, only radiation passing through the recess 30 without touching the wall 28 can be transmitted through the adapter.

[0043] The adapter may, for example, comprise a plurality of rods, each rod being fixed to the proximal part 3 and extending along the axial direction A around the recess 30. The wall 28, or guard, surrounds the plurality of rods and allows, for example, the formation of an axial tunnel with a rectangular cross-section opening outside the adapter. The axial tunnel corresponds to the recess 30. The plurality of rods may comprise four rods, each fixed to a corner of the rectangular shape of the proximal part 3. The plurality of rods may also comprise four other rods parallel to the previous ones and distributed on the four sides of the frame.

[0044] It is possible to isolate the radiative exchanges between the device and the room from the external environment, that is, to ensure that the energy emitted by the device towards the room is the only energy received by the room and conversely, that the energy emitted by the room towards the device is the only energy received by the device. Isolating the radiative exchanges may be sought in particular to avoid disturbing the excitation of the room by the device, the diffusion phenomenon, and the signal acquired from the diffusion in the room by the detector. Isolating the radiative exchanges may also be sought to prevent flashes of light from dazzling the operators. To this end, the wall 28 may include an external part 281 opaque to radiation, such as, for example, the radiation emitted by the source 24.The outer part 281 of the wall 28 can be made of opaque fabric made from nylon and cotton, or from polyamide and elastane, or from synthetic rubber.

[0045] In addition, the wall 28 may include, for example, an internal part 282 reflective for radiation, such as, for example, the radiation emitted by the source 24. The internal part 282 of the wall 28 may include a gold or silver coating. Contact element

[0046] The adapter 1 includes a contact element 7 forming a free end. The contact element 7 is included in the distal part 5 of the adapter. The contact element 7 is intended to make direct contact with the part to be inspected.

[0047] The contact element 7 is mounted to move relative to the proximal portion 3 such that the distal portion 5 deforms when a force is applied to the contact element 7. In particular, when the force is applied in the axial direction A, the contact element 7 can be displaced in that direction. At the point on the distal portion 5 occupied by the contact element 7, there is then a deformation of the distal portion 5. The distal portion 5 has a length along the axial direction A at this point that is shorter or longer depending on whether the contact element 7 has been moved closer to or further from the proximal portion 3.

[0048] The adapter includes a contact element that is movable relative to the proximal portion, such that by applying force to the contact element, the distal portion can deform to better conform to the part being inspected. This deformation depends on the shape of the part, so that the adapter conforms more closely to its shape. It becomes possible to automatically move the device towards the part to be inspected without damaging it. For example, the adapter 1 includes a deformable member 11 linked to the contact element 7 so as to mount the contact element 7 movable relative to the proximal part 3. For example, the deformable member can be fixed on one side to the proximal part 3 and on the other side to the contact element 7. Thus, when the deformable member 11 deforms, the distance between the contact element 7 and the proximal part 3 changes, which allows the contact element 7 to be mounted movable relative to the proximal part 3.

[0049] The deformable member 11 can in particular be deformable along the axial direction A.

[0050] The deformable member 11 is advantageously selected from a compression spring, a single-acting cylinder, or a double-acting cylinder. The spring and the cylinder are advantageously oriented to deform in the axial direction A.

[0051] When the adapter comprises a plurality of rods, at least one of the rods may be chosen to be deformable along the axial direction A. A contact element may be fixed to the end of the rod.

[0052] Figures 1, 3 and 4 represent the case of a deformable member in the form of a single-acting cylinder.

[0053] The deformable member 11 can be linked to the contact element 7 either rigidly or by means of a pivot joint or by means of a ball joint.

[0054] In the first case, there is no significant movement possible between the deformable organ 11 and the contact element 7.

[0055] In the second case, there is a significant possible movement between the deformable member 11 and the contact element 7, which is a rotational movement along a single direction.

[0056] In the third case, there is a significant possible movement between the deformable member 11 and the contact element 7, which is a rotational movement in all three spatial directions. This case is shown in [Fig. 2] where two contact elements 7 are each connected to a deformable member 11 by means of a ball joint 13.

[0057] The contact element can be made of Teflon, elastomer or aluminum.

[0058] The contact element can be obtained by 3D printing of molten wires of polymer, for example polyethylene.

[0059] Advantageously, when the adapter includes a contact element mounted movable relative to the proximal portion, the adapter may include a deformable optical isolation wall 28. In particular, the wall 28 can be deformed along the axial direction A; that is, depending on a stress applied to the wall 28, its length along the axial direction can vary. The wall 28 can be shortened or lengthened in the axial direction. The deformability of the wall 28 is local; that is, for different angular positions defined around the axial direction A, the wall 28 can take on different lengths in the axial direction A.

[0060] The wall 28 can be made deformable by incorporating a fabric, plastic, pleated parts, and in particular accordion-pleated parts or sections configured to interlock along the axial direction. Figure 4 illustrates the example of a wall comprising accordion-pleated parts along the axial direction A. The accordion-pleated parts or the sections configured to interlock along the axial direction have sufficient mechanical clearance to allow different lengths of the wall 28 in the axial direction A at different angular positions around the axial direction A.

[0061] The device can only be partially in contact with the part. When the device and the part come into contact, gaps of varying sizes are created between them. These gaps prevent the isolation of the exchanges between the device and the part from the external environment. In other words, the energy emitted by the device towards the part is not the only energy received by the part, and conversely, the energy emitted by the part towards the device is not the only energy received by the device. This disrupts the excitation of the part by the device, the diffusion phenomenon, and the signal acquired from the diffusion in the part by the detector. Furthermore, the flashes of light passing through the gaps can dazzle the operators.

[0062] The adapter, comprising a contact element mounted movable relative to the proximal part and a deformable optical isolation wall 28, reduces the gaps between the adapter and the part to be analyzed. By deforming, the distal part This causes a deformation of the wall. The distal part conforms to the shape of the part and the adapter isolates the radiative exchanges between the device and the part from the external environment. Shape of the contact element

[0063] Advantageously, and as illustrated in [Fig. 2], the contact element 7 has rounded or chamfered edges 9. Such edges reduce and limit scratches inflicted on the part being inspected when the contact element 7 comes into contact with it.

[0064] In a first embodiment, the contact element has a spherical shape. Advantageously, the contact element has this shape when the deformable member 11 is rigidly connected to the contact element 7. The rigid connection can, in particular, be configured so that the deformable member is aligned along a direction passing through the center of the spherical shape.

[0065] In a second embodiment, the contact element has a parallelepiped shape. In particular, the contact element can take the form of a skate, as shown in [Fig. 2]. This parallelepiped shape is defined by three dimensions: a length, a width, and a depth. The length is greater than the width, which is itself greater than the depth. The skate is preferably oriented so that the depth extends primarily along the axial direction A, while the length and depth extend in directions orthogonal to each other and orthogonal to the axial direction A.

[0066] Advantageously, the contact element has this parallelepiped shape when the deformable member 11 is connected to the contact element 7 either by a pivot joint or by a ball joint. In this way, upon contact of the contact element 7 with the part to be inspected, the pad orients itself to conform more closely to the shape of the part, that is to say, to increase the contact area between the part and the pad.

[0067] The adapter can be configured so that the deformable member is aligned along a direction passing through the axis of rotation of the pivot joint or the center of rotation of the ball joint. This increases the stability of the contact and reduces gaps during contact. Advantageously, the pivot joint or ball joint can be positioned at the center of the contact element 7.

[0068] Plural of the set “deformable organ” and “contact element”

[0069] The adapter 1 can include a plurality of contact elements 7, each contact element 7 being mounted movable relative to the proximal part 3.

[0070] The contact elements 7 may all have the same shape, for example a spherical or parallelepiped shape. Alternatively, the contact elements 7 may have different shapes.

[0071] Advantageously, each contact element 7 is mounted movable relative to the proximal part 3 via a deformable member 11. The adapter 1 then comprises a plurality of deformable members 11, each deformable member 11 being associated with a contact element 7 so as to form a deformable member 11 + contact element 7 assembly. The adapter 1 then comprises a plurality of 'deformable member 11 + contact element 7' assemblies.

[0072] The various contact elements can be arranged in different ways, and in particular they can be aligned along a closed perimeter. This closed perimeter defines the shape of the distal part. This perimeter can be polygonal, such as a square, rhombus, rectangle, parallelogram, hexagon, or octagon, or circular or ellipsoidal. Figures 1, 3, and 4 illustrate the case of a perimeter that takes a square shape.

[0073] Along this closed perimeter, the contact elements can be regularly distributed, meaning that the distance between two adjacent contact elements—that is, two nearest neighbor contact elements—is constant from one pair of adjacent contact elements to another pair of adjacent elements. Here, "constant distance" is understood to mean a distance that does not vary by more than 5% from one pair of adjacent contact elements to another pair of adjacent elements. Adjacent elements can be defined as contiguous when they are in contact with each other or nearly in contact with each other.

[0074] When the various contact elements are aligned along a closed perimeter, this perimeter is a distal perimeter. The various deformable parts are advantageously oriented along the axial direction A and fixed to the proximal part by means of fixing points that are distributed along a proximal perimeter of the same shape as the distal perimeter. When the contact elements are regularly distributed along the distal perimeter, the fixing points are advantageously regularly distributed along the proximal perimeter.

[0075] In the case where the perimeter has a polygonal shape and therefore defines vertices, two contact elements located at the vertices can be chamfered in a complementary manner and opposite each other so as to define the vertex of the polygonal shape. Alternatively, and with reference to [Fig. 2], a contact element 7 located at a vertex can have a shape having two sub-parts 7A and 7B on either side of the vertex, the first sub-part 7A defining an angle with respect to the second sub-part 7B, the angle corresponding to the angular deviation of the perimeter at the vertex. In the example of [Fig. 2], this angle is a right angle.

[0076] In the case where the contact elements each take an identical parallelepiped shape, the length of each shape can be oriented along the perimeter and the width can be oriented orthogonally to the perimeter.

[0077] It is possible to link two adjacent contact elements by an elastic element. In this way, the displacements of the contact elements 7 in contact with the part to be controlled are dependent on each other.

[0078] In the case where the contact elements each take an identical parallelepiped shape, the contact elements can advantageously be arranged in pairs contiguous, two contiguous contact elements being directly linked by an elastic element 17. This additional link makes it possible to maintain a continuity of the perimeter defined by the different contact elements 7.

[0079] Preferably, each pair of two adjacent contact elements can be linked by two elastic elements 17 connected to the contact elements in parallel. This connection between two adjacent elements also prevents rotation of one contact element relative to the other around an elastic element.

[0080] When the adapter 1 comprises a plurality of contact elements 7 and also includes a deformable optical isolation wall 28 surrounding the recess 30, the isolation wall 28 can be fixed to an outer edge of the various contact elements. In this way, the entry of radiation into the adapter or the exit of radiation from the adapter is limited between the contact elements 7 and the proximal portion 3.

[0081] Non-destructive testing system for a part using radiation

[0082] A non-destructive testing system is also proposed, comprising an adapter 1 as described so far and an electromagnetic radiation non-destructive testing device also described earlier in the text. In such an electromagnetic radiation non-destructive testing system, the proximal part of the adapter 1 is rigidly fixed to the non-destructive testing device 22.

[0083] The system may advantageously further comprise a carriage and a robotic arm associated with a control system, the carriage supporting the robotic arm and the robotic arm supporting the non-destructive testing device. The robotic arm is configured to move and orient the device in space. This makes it possible to position the device precisely opposite the part to be inspected. The robotic arm can then press the inspection device against the part so as to deform the distal part of the adapter. The distal part is thus adapted to the shape of the part to be inspected. Once the measurement has been taken, the robotic arm can move the device and position it opposite another part of the part to be inspected to perform a second measurement.

[0084] Method for non-destructive testing of a part by radiation

[0085] The invention further relates to a method of this type comprising the following steps:

[0086] - bringing a contact element of a control system into contact with the part,

[0087] - application of a force on the contact element, and

[0088] - displacement of the contact element relative to the rest of the system under the action of the effort and deformation of the system according to the shape of the part.

[0089] Advantageously, an adapter comprising a plurality of contact elements 7 can be used, the number of which is fixed according to the geometry of the part to be controlled.

[0090] The geometry of the part to be controlled can in particular be defined by an average length, denoted L, of the part and an average radius of curvature, denoted R, of the part.

[0091] To this end, the method may include a step of determining the average length L and the average radius of curvature R of the part. For example, a rangefinder or a time-of-flight (ToF) camera can be used to determine the average radius of curvature R by determining the relative distance between the rangefinder and the part. A robot can be used to determine the total length to be inspected.

[0092] The number of contact elements can be fixed according to the average length and the average radius of curvature.

[0093] For example, one can choose to increase the number of contact elements - when the average radius of curvature decreases, or - when the average length increases.

[0094] Such a variation can be based, in particular, on the ratio of the average radius of curvature to the average length, and the number of contact elements can be increased when the ratio of the average radius of curvature to the average length decreases. In this way, it is possible to adapt the number of pads to the structure or geometry of the part to be inspected.

[0095] One way of determining the number of contact elements may include, in particular, the following steps:

[0096] - determination of an integer part of a ratio of the mean radius of curvature to the average length, and

[0097] - determination of a difference between the number ten and the integer part,

[0098] the number of contact elements included in the adapter being equal to four times the difference.

[0099] Denoting E as the integer part function and N as the number of contact elements, the preceding steps consist of carrying out the following calculation: N=4 / (10 - E(R / L)).

[0100] Optionally, when the contact elements are distributed around a closed perimeter of square shape, it is also possible to choose the number of contact elements 7 per side of square equal to 10 - E(R / L).

[0101] For the particular case where this integer part is greater than or equal to 10, eight contact elements may suffice, for example one contact element per side of the square plus one contact element per corner of the square.

[0102] Finally, the following steps can be added to the non-destructive testing process:

[0103] - emission through the control system of radiation towards the room, and

[0104] - acquisition through the control system of a temporal diffusion response of heat in the room.

[0105] Image processing can also be implemented to identify any local thermal contrasts associated with defects in the part within the imaged area.

[0106] The method can be implemented to image a second area and for this purpose, it can be provided that the system is moved back from the part to be inspected and that the system is shifted from the area already inspected to inspect a second area of ​​the part.

[0107] The steps previously presented for imaging and analyzing the first area can be implemented to image and analyze the second area.

[0108] Several zones can be imaged and analyzed successively. The part to be inspected can be divided into different zones that define its entire surface so that a complete scan of the part can be performed by imaging and analyzing the different zones.

[0109] The system's movements, transmission and acquisition sequences can be automated by means of a central control system. A central control system can, for example, comprise a trolley and a robotic arm associated with a control system, as described previously.

Claims

Demands

1. Adapter (1) for non-destructive testing device by electromagnetic radiation, the adapter (1) comprising: - a proximal part (3) configured to be fixed to a testing device, and - a distal part (5) comprising a contact element (7) forming a free end and mounted movable relative to the proximal part (3) so that the distal part (5) deforms when a force is exerted on the contact element (7), - a deformable member (11) linked to the contact element (7) so as to mount the contact element (7) movable relative to the proximal part (3), the deformable member (11) preferably being a compression spring, a single-acting cylinder or a double-acting cylinder, the contact element (7) being linked to the deformable member by means of a ball joint or pivot joint (13), the contact element (7) having a parallelepiped shape.

2. Adapter according to claim 1 in which the contact element (7) has rounded or chamfered edges (9).

3. Adapter according to any one of claims 1 to 2 wherein the contact element (7) and the deformable member (11) form a first assembly (15), the adapter comprising a plurality of assemblies (15).

4. Adapter according to claim 3 in which the contact elements are arranged in pairs contiguous, two contiguous contact elements being directly linked by an elastic element (17).

5. Adapter according to claim 4 in which the elastic element (17) is a first elastic element, the two contiguous contact elements being further directly linked by a second elastic element, the first and second elastic elements being connected to the contact elements by a parallel mounting.

6. An adapter according to any one of claims 1 to 5, wherein the adapter extends from the proximal portion (3) to the distal portion (5) along an axial direction (A), the adapter being hollow so as to have a recess (30) along the axial direction (A), the recess (30) opening to the outside of the adapter (1) through the proximal portion (3) and through the distal portion (5), the adapter (1) comprising an optical isolation wall (28) surrounding the recess (30), the wall (28) comprising an outer portion (281) opaque to a electromagnetic radiation, and an internal part (282) reflective for electromagnetic radiation, the electromagnetic radiation being intended to be used for non-destructive testing.

7. Adapter according to claim 6 in which the optical isolation wall (28) is deformable, the wall preferably comprising a fabric, plastic, accordion-pleated parts or sections configured to fit together along the axial direction.

8. Non-destructive testing system (20) by electromagnetic radiation comprising - a non-destructive testing device (22) by electromagnetic radiation, the device comprising a radiation source (24) and a radiation detector (26), - an adapter (1) according to any one of claims 1 to 7, the proximal part (3) being rigidly fixed to the non-destructive testing device (22).

9. A method for non-destructive testing of a part by radiation, comprising the following steps: - bringing a contact element of a testing system into contact with the part, - applying a force to the contact element, and - displacing the contact element relative to the rest of the system under the action of the force and deforming the system according to the shape of the part, the deformation including a rotation of the contact element relative to the rest of the testing system.

10. A method according to claim 9, comprising the following steps: - emission through the control system of radiation towards the part, and - acquisition through the control system of a time-domain heat diffusion response in the part.