Inspection system for inspecting local material stiffness

Abstract

The invention relates to an inspection system for inspecting a local material stiffness at a support interface of an inspection body. In this case, the inspection system comprises at least one inspection adapter, on which at least one measuring element for detecting a measured value in order to determine the stiffness of the material is arranged at least indirectly. In this case, the test adapter has a mating receptacle complementary to the receptacle of the support interface. By means of the mating receptacle, the inspection adapter can be accommodated in the receptacle in a stationary manner. Furthermore, the test adapter has a base body with a fastening region, on which a clamping device is now arranged as a mating receptacle. The clamping device is designed to rereleasably hold the test adapter by means of at least one frictional lock when the mating receptacle is arranged in the receptacle of the test body in the clamped state.

Description

Technical Field

[0001] The invention relates to an inspection system for inspecting the local material stiffness at a bearing interface of an inspection body and to the use thereof. Background Art

[0002] In the development of many products, it is necessary to check the functionality of the product in the development state in advance during operation. In this case, it is particularly interesting to check whether the operating parameters and operating behavior meet the set specifications and, if necessary, to continue or adjust the product development accordingly based on the knowledge gained from the check.

[0003] During development, such tests are usually not carried out in the actual operating environment of the product to be tested. Instead, the tests are carried out using a correspondingly equipped test bench. In its implementation, the test bench is significantly reduced in comparison with the subsequent actual operating environment. For example, correspondingly interconnected aluminum profiles can serve as a test bench to simulate the frame or chassis of a motor vehicle in terms of function. Thus, for example, a wheel suspension can be functionally tested on this test bench.

[0004] In this context, requirements are usually set for the inspection bench, so that the inspection bench is only suitable for use if its behavior corresponds to the operating environment of the product to be inspected, at least within predefined limits. A particularly important property is the material stiffness, which can influence the operation of the product, for example, through special vibration behavior. It is therefore important to determine the suitability of the inspection bench accordingly, taking into account the diversity of products. Otherwise, the inspection results obtained may deviate greatly from the actual operating results. In principle, for each product to be inspected, it is possible to consider using an inspection bench specially manufactured for this purpose, which corresponds to the operating environment in terms of behavior.

[0005] Among the already existing plurality of inspection stations, a respectively suitable inspection station for the product to be inspected can be selected or determined by inspecting its local material properties.

[0006] In order to measure the local material stiffness by means of sensors, a number of measuring methods are known which, after a defined vibration excitation of the inspection table at a specific location by means of an impulse hammer, detect its system-specific vibration response, in particular the vibration characteristics over time, and determine the corresponding local material stiffness by means of corresponding physically based calculation methods.

[0007] In this case, the inspection table has a support frame, for example in the form of a bearing seat, which usually corresponds to the actual fixing interface of the product to be inspected. In this case, the sensor is arranged on a corresponding cylindrical bushing and is bonded to the support frame of the inspection table without gaps via its outer cylindrical surface. Thus, a rigid connection is provided for error-free vibration detection. However, after the inspection is completed, corresponding costs are incurred to release the support frame from the bushing and the adhesive layer. In the case of many inspection tables and products to be inspected, the inspection process is accordingly time-consuming and therefore cost-intensive. Summary of the invention

[0008] The object of the present invention is to carry out the examination or determination of the local material stiffness on any desired test object in a flexible and simplified manner.

[0009] This object is achieved by a testing system according to the invention for testing the local material stiffness at a bearing interface of a test body and by the use thereof.

[0010] The invention therefore relates to a testing system for testing the local material stiffness at a bearing interface of a test body, the testing system comprising at least one testing adapter, on which at least one measuring element for detecting a measured value for determining the material stiffness is arranged at least indirectly. The testing adapter has a mating receptacle complementary to a receptacle of the bearing interface, by means of which the testing adapter can be received in the receptacle in a positionally fixed manner.

[0011] In addition, the inspection adapter has a base body with a fixing area, on which a clamping device is now arranged as a matching receptacle. The clamping device is configured to hold the inspection adapter in a releasable manner by means of at least one friction lock when the matching receptacle is arranged in the receptacle of the inspection body in a clamped state. It has been proven to be advantageous that this friction lock can achieve error-free measurement results. Here, in the inspection situation, the clamping device forms a gapless rigid connection with the support frame in a very simple manner. On the contrary, once the inspection situation is over, the connection can be completely and immediately released. Here, this embodiment can be implemented more compactly and can advantageously use a clamping device that is freely available on the market. This clamping device includes a specific clamping area, so that the inspection adapter can be flexibly used for different inspection situations of different receptacles of the inspection body included in the covered clamping area.

[0012] The inspection system according to the invention can be advantageously expanded and improved by the measures listed in this document.

[0013] In an advantageous embodiment of the inspection system, the base body has a stop on the side facing away from the fixing region for determining a fixed holding position of the inspection adapter in the receptacle of the inspection body. Thus, on the one hand, the same, reproducible inspection situation can always be provided. Thus, the inspection results remain absolutely similar. On the other hand, the stop locks the holding position in which a frictional lock that can be formed by means of the clamping device is obtained at an optimal point in the support frame. As will be further described later, the stop also provides a support in a simple manner, towards which the clamping device can be safely moved until the clamping state is reached. Thus, the clamping state is produced when the clamping device is partially moved so that it forms a retaining contact force relative to the physically abutting mating surface, wherein the abutment formed in this way can be moved laterally within the abutment surface only by overcoming the friction forces acting in the abutment contact.

[0014] In a further advantageous embodiment of the test system, the fastening region of the base body and the clamping device have a common orientation axis for introducing the test adapter into the receptacle of the test body. In this case, the frictional connection can be formed by at least one clamping force acting in the direction of the orientation axis or parallel to the orientation axis on at least one part of the clamping device, so that when the mating receptacle of the test adapter is arranged in the receptacle of the test body, a clamped state of the clamping device is achieved. Advantageously, this results in a simple centering on the test adapter, so that the clamping device can be arranged centrally relative to the receptacle, preferably from all sides. The frictional connection thus acts in the same manner in all contact surfaces, and the ideal force flow from the test adapter to the support frame and / or vice versa acts in the same manner.

[0015] Preferred is an embodiment of the test system in which the clamping force is achieved by radial expansion of the clamping device relative to the orientation axis. Advantageously, even very high clamping forces can be achieved with a small radial expansion. Furthermore, the installation space that is initially reserved for introducing the test adapter into the receptacle of the test body is prepared as available functional space for the test adapter, for example for arranging functional means to achieve the clamping force of the clamping device.

[0016] In general, great advantages result in embodiments of the test system in which the fastening region of the base body is designed such that it, together with the receptacle of the test body, provides a counterpart consisting of an opening and a mandrel. Here, when the counterpart receptacle of the test adapter is arranged in the receptacle of the test body, the mandrel is at least partially arranged in the opening and the clamping device is arranged between the opening and the mandrel. In this form, a very compact embodiment can be constructed for different application requirements. In addition, tolerances can be kept small so that the friction fit can be formed identically on all sides.

[0017] Particularly advantageous is an embodiment of the inspection system in which the clamping device comprises at least one conical clamping sleeve which at least partially or completely has a circumferential side surface of a cone or truncated cone. In this case, a fixed connection can only be formed by means of a friction fit if the circumferential side surface is in a force-actuated abutment contact with a conical counterface of a receptacle of the inspection body, a conical counterface of a fixing region of the base body or a conical counterface of another clamping sleeve of the clamping device. In contrast, if such a force-actuated abutment contact is missing, the connection will become loose. Thus, such an inspection system can be used very quickly, but can also be removed quickly, so that the inspection process can be carried out very quickly without a great deal of effort.

[0018] The advantageous improvement of the last-mentioned embodiment of the inspection system is that the clamping device has at least two, three or more conical clamping sleeves arranged side by side. Here, complementary conical circumferential sides facing each other are formed on two adjacent clamping sleeves, and a cylindrical surface pointing outward is formed on each clamping sleeve, and a cylindrical surface pointing inward is formed on the other clamping sleeve. In the clamped state of the clamping device, a force-applied abutting contact can be formed between the inwardly pointing cylindrical surface of the corresponding clamping sleeve and the fixing area of ​​the base body, between the outwardly pointing cylindrical surface of the corresponding clamping sleeve and the receiving portion of the inspection body, and between the complementary circumferential sides of the respectively adjacent clamping sleeves. On the one hand, very high clamping forces can be generated in this way, and therefore also very effective friction locking. In addition, possible tolerances in the direction of the orientation axis can be compensated on the fixing area or the receiving portion of the inspection body. Because the clamping sleeves arranged in series always ensure corresponding abutting contacts, and therefore ensure that corresponding friction locking is formed in the direction of the orientation axis.

[0019] In the embodiment of the inspection system, a particular advantage is provided, in which the inspection adapter has a pressing element, in particular a pressure washer, which is arranged adjacent to the clamping device and can be moved relative to the clamping device by means of a locking element adjustable relative to the base body, so that after the abutting contact, a clamping force can be formed with another movement and the force value of the clamping force is adjustable. Therefore, the inspection adapter already includes all the components required for fixing and releasing the inspection adapter itself in a fixed position. Likewise, the corresponding friction lock is ensured by the corresponding adjustment of the stroke and / or force of the locking element, which may be monitored. In this case, for example, a very effective embodiment can be realized, in which, in the case of forming an adjusting element, the fixing area has a threaded section, in particular an external thread, on the end side, and the pressing element, in particular, in the form of a nut, has a complementary mating thread. Other exemplary simple embodiments are produced in the following manner, that is, the fixing area has a threaded section, in particular an internal thread, on the end side, wherein the locking screw is threaded in the internal thread through an opening in the pressure washer, so that the pressure washer acts on at least a part of the clamping device with a clamping force when the mating receptacle is arranged in the receptacle of the inspection body.

[0020] In this context, embodiments of the test system are generally advantageous in which the receptacle and / or the clamping device of the test body can be clamped in a sandwich-like manner between the pressing element and a stop on the base body. In this way, most conceivable supports of the test body can be accessed in order to test the local material stiffness effective there, without requiring additional auxiliary tools for fixing or securing the test adapter in the receptacle of the test body.

[0021] Different possibilities are provided with respect to the measuring system interacting with the inspection adapter for checking the local material stiffness. Advantageously, a measuring sensor, in particular an acceleration sensor and / or a force sensor, for example, is used as a measuring element. The measuring sensor provides a sensor value in a defined inspection situation, which can determine the effective local material stiffness. Alternatively or additionally, the measuring element can also be provided by a measuring surface arranged on the inspection adapter, in particular on a substrate, for scanning by a mechanical or optical position detection system. The position detection system is arranged in the measuring device in this case so that, for example, a scanning laser beam or a contacting mechanical probe can directly approach the measuring surface smoothly and effectively. Advantageously, the local material stiffness can be inferred by known physical calculation methods based on the sensor values ​​detected and provided by the measuring element, such as stroke measurement values, acceleration measurement values ​​and / or velocity measurement values, in particular over the inspection time course.

[0022] In order to perform the inspection process under defined inspection conditions, the inspection adapter has a force introduction area, which is configured to introduce the force pulse of the struck impulse hammer into the inspection adapter. The force introduction area is preferably formed integrally on the base body. In addition, the force introduction area preferably has at least three flat surfaces for introducing force that are oriented to each other in different spatial directions. For example, the force introduction area is configured as a rectangular or square dome that protrudes toward the end side of the fixing area facing away from the base body. The freely accessible side surface can be used as a flat surface for introducing force in a specific spatial direction. Similarly, a measuring sensor can be arranged on one of the side surfaces for detecting a measured value under defined inspection conditions. In addition, one of the side surfaces can also be configured as the aforementioned measuring surface.

[0023] A great advantage results in an embodiment of the inspection system which comprises a set of at least two or more different inspection adapters, wherein the different inspection adapters for use on the inspection body cover receptacles of different size ranges of the inspection body. Thus, the inspection system can be implemented movably with different inspection adapters. For example, different inspection bodies can be provided in boxes. When an inspection is required, the existing set of inspection adapters can simply be brought on site to any inspection body. It is also possible to select on site the corresponding inspection adapter adapted to the support frame of the inspection body from the set. Thus, the set of inspection adapters can be used flexibly for varying uses on the inspection body in the inspection situation.

[0024] In a special implementation system, the inspection system also includes an evaluation unit, which determines the effective material stiffness based on one or more detected sensor values, especially acceleration values, velocity values ​​and / or path lengths when the matching receiving portion of the inspection adapter is arranged in the receiving portion of the inspection body and after the vibration excitation of the inspection adapter and / or the inspection body. With the help of a known calculation algorithm, the determination is made in consideration of the specific detected and provided sensor values. The calculation algorithm depicts the transfer function of the inspection platform, which is manifested as the force excitation caused by the system response of the inspection platform. The present invention also relates to using an inspection system according to at least one of the above-mentioned embodiments to check the material stiffness of other other systems of the structural components of the supporting interface, wheel suspension system, motor / electric drive, motor / electric drive auxiliary frame and especially the structural components of the motor vehicle. In addition, for example, the preferred use in the function inspection platform for checking functional components or functional structural components is provided in the form of the aforementioned system. The functional inspection platform has a frame and a support frame connected to the frame. Here, the operating conditions of the actual operating environment of the functional component or functional structural component are simulated by the frame and the support frame. By using the inspection system, it is possible to determine the suitability of a functional inspection bench with a sufficient simulation of the actual operating environment of the functional component to be inspected or the functional assembly to be inspected, for example as a simulation of a specific frame of a motor vehicle. Usually, inspection bench fixing points are selected for the inspection bench, which correspond to the actual supports for fixing the functional component to be inspected or the functional assembly to be inspected. In order to accurately measure the local dynamic stiffness, the measuring acceleration sensor must be adapted to the line of the excitation force and placed as close as possible to the inspection bench fixing points. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Further advantages, features and details of the invention are apparent from the following description of preferred exemplary embodiments and with reference to the accompanying drawings.

[0026] Figure 1 A schematic perspective view of a testing system for testing local material stiffnesses in a support frame of a test body during a test.

[0027] Figure 2a A first exemplary embodiment of an inspection adapter is shown in a side sectional view,

[0028] Figure 2b A second example embodiment of an inspection adapter is shown in a cross-sectional view from the side.

[0029] Figure 2c A third exemplary embodiment of an inspection adapter is shown in a sectional view from the side,

[0030] Figure 2d A fourth exemplary embodiment of an inspection adapter is shown in a sectional view from the side,

[0031] Figure 3 A group of different inspection adapters coordinated with one another is shown by way of example.

[0032] In the figures, components with the same function are respectively denoted by the same reference numerals. DETAILED DESCRIPTION

[0033] Figure 1 A purely schematic perspective view of a testing system 100 is shown for testing the local material stiffness in a support frame of a test body 200 in a testing situation. For example, the testing situation can be designed so that the actual local material stiffness at a support frame 220 of a functional component or functional assembly is tested or determined. The functional component or functional assembly can be, for example, a windshield wiper system, a window lift system, a luggage compartment opening system, a wheel suspension system or other systems with bearings, especially in a motor vehicle. In these cases, the support frame 220 can be connected via connecting elements in the test body 200 or, if necessary, can be integrally formed on a specific subelement 210 of the test body 200.

[0034] Likewise, the inspection body 200 can be a functional inspection table, on which the operating parameters of the functional elements or functional structural components to be inspected, for example, are obtained. In these cases, the inspection system is used to check the suitability of fully describing the actual operating environment for the functional elements or functional structural components. In particular, it is decisive to check the local material stiffness in the support frame 220, which is configured to fix the functional elements or functional structural components. Under operating conditions, there is the following requirement, that is, the system response of the functional inspection table corresponds essentially, but at least in a certain limited area, to the actual operating environment, such as a specific frame of a motor vehicle. The support frame 220 provided by the functional inspection table usually corresponds to the actual support for fixing the functional elements to be inspected or the functional structural components to be inspected. The support frame 220 is connected to the base frame of the functional inspection table 200, for example, by a threaded connection. Here, the base frame can be formed by an aluminum profile.

[0035] The testing system 100 comprises at least one testing adapter 10, which is received or held in a fixed position in a support frame 220. In order to carry out the test in the testing situation, the testing adapter 10 has a force introduction region 12, which is designed to introduce a force pulse F of an impinging hammer (not shown) into the testing adapter 10. The force pulse is conducted via the testing adapter 10, the connection region 20 to the support frame 220, the support frame 220 itself into the testing body 200, for example a functional testing table 200, and there, depending on the local material stiffness, a system response is induced, which can be measured by at least one measuring element 30 on the testing adapter 10. The force introduction region 12 is, for example, a dome, which is rectangular or square in cross section, and which protrudes from the final end face 11.a of the testing adapter 10. For the approach of the impinging hammer, the dome protrudes in particular beyond the support frame 220 with its at least three flat surfaces 13 oriented relative to all three spatial planes. Preferably, the dome is integrally formed on the base body 11 of the testing adapter 10. The force pulse F can be introduced into the test adapter 10 via all these flat surfaces 13, oriented in the spatial directions x, y, z, respectively. A measuring element 30 can be arranged on the flat surfaces 13 respectively opposite the mentioned flat surfaces 13, for measuring the system response in at least one spatial direction x, y, z corresponding to the striking direction of the impulse hammer.

[0036] Figure 1 A sensor element 30.1 arranged on a flat surface 13 is shown as a measuring element 30. Here, the sensor element 30.1 is preferably a force sensor, an acceleration sensor and / or a velocity sensor, which detects and prepares corresponding sensor values ​​in the system response in the course of time. Additionally or alternatively, one of the flat surfaces 13 can be designed as a measuring surface 30.2 for scanning by a mechanical or optical position detection system (not shown). For example, a laser system is considered as an optical system, by which a laser beam is directed to the measuring surface 30.2 and in the system response, the running time until the change of the measuring surface 30.5 is determined in the inspection. A similar situation can be realized by a mechanical scanning arm, which rests on the measuring surface 30.2 and determines the corresponding motion characteristics by measuring technology. For the measured values ​​obtained from the system response in the course of time, in particular force values, acceleration values, velocity values ​​and / or path length, the local material stiffness in the support frame 220 of the inspection object 200 is determined by an evaluation unit 40 operatively connected to the measuring element 30.

[0037] The test adapter 10 has a mating receptacle 14 which is complementary to the receptacle 224 of the bearing interface 220, by means of which the test adapter 10 can be held in a fixed position in the receptacle 224. In order to test the local material stiffness simply and flexibly, the test adapter 10 has a fixing region 11.b formed on the base body 11. The clamping device 20 is arranged on the fixing region as the mating receptacle 14. Here, the clamping device 20 is designed to hold the test adapter 10 in a releasable manner by means of at least one friction lock when the mating receptacle 14 is arranged in the receptacle 224 of the test body 200 in the clamped state.

[0038] There are various possibilities for implementing the test adapter 10 with the clamping device 20, wherein the following is described. Figures 2a to 2dThe embodiment shown. In this case, it is common to all the embodiments that the fixing region 11.b of the base body 11 is designed to provide, together with the receptacle 220 of the test body 200, a counterpart consisting of an opening and a mandrel, wherein, when the counterpart receptacle 14 is arranged in the receptacle 224, the mandrel is at least partially arranged in the opening, and the clamping device 20 is arranged between the opening and the mandrel. Preferably, the mandrel is designed with a cylindrical shape and, in contrast, the opening has a corresponding opening with a circular cross section. In addition, all the embodiments have a stop 11.c for determining a fixed holding position of the test adapter 10 in the receptacle 224 of the test body 200. It is also common that the fixing region 11.b of the base body 11 and the clamping device 20 have a common orientation axis S for introducing the test adapter 10 into the receptacle 224 of the test body 200. The clamped state of the clamping device 20 is achieved when at least one clamping force VK is applied in the direction of the orientation axis S or parallel to the orientation axis to at least a part of the clamping device 20. This applied clamping force VK results in a radial expansion of the clamping device 20 relative to the orientation axis S. Starting from the smallest outer diameter of the clamping device 20 in the unclamped state, the outer diameter can reach a radially enlarged maximum outer diameter D in abutting contact with the receptacle 224 of the test body 200 with the aid of the clamping force VK while forming a friction fit. In all embodiments, the clamping device 20 also comprises at least one conical clamping sleeve 20.a, 20.b, 20.c, which at least partially or completely has a circumferential surface 20.12 of a cone or a truncated cone. Furthermore, the test adapter 10 always has a pressing element 16, which is arranged adjacent to the clamping device 20, in particular on the end side of the base body 11 facing away from the force introduction region 12. The pressing element 16 can be moved relative to the clamping device 20 by means of the locking element 15, in particular in the direction of the orientation axis S. As the movement increases when the contacting contact is formed between the outer surface of the clamping device 20 and the mating surface of the receiving portion 224, the clamping force VK is adjustable in its force value, and thus the frictional connection that can be formed is also adjustable. These embodiments also show the clamping principle, in which the receiving portion 224 of the test body 200 and / or the clamping device 20 are clamped in a sandwich-like manner between the pressing element 16 and the stop portion 11.c on the base body 11.

[0039] exist Figure 1The characteristics of the first embodiment of the inspection system 100 can be seen in FIG. Thus, the clamping device 20 has at least two, (shown as an example) three, (but it is also conceivable) more mutually arranged conical clamping sleeves 20.a, 20.b, 20.c. Two adjacent clamping sleeves 20.a, 20.b, 20.c each additionally have mutually facing complementary conical circumferential sides 20.12. In addition, an outwardly directed cylindrical surface 20.a2, 20.c2 is formed on one of the clamping sleeves 20.a, 20.b, 20.c, and an inwardly directed cylindrical surface 20.b1 is formed on the respectively adjacent clamping sleeves 20.a, 20.b, 20.c. If the clamping state of the clamping device 20 is present when the corresponding clamping force VK acts, a force-actuated abutment contact is respectively constructed between the inwardly directed cylindrical surface 20.b1 of the corresponding clamping sleeve 20.a, 20.b, 20.c and the fixing area 11.b of the base body 11 and between the outwardly directed cylindrical surface 20.a2, 20.c2 of the corresponding clamping sleeve 20.a, 20.b, 20.c and the receiving portion 224 of the inspection body 200 and between the complementary circumferential side surfaces 20.12 of the corresponding clamping sleeve 20.a, 20.b, 20.c. The clamping force VK is constructed by means of a locking screw 15.a and a pressure washer 16.a. The locking screw 15.a passes through the central opening of the pressure washer 16.a and is threadedly connected to the internal thread constructed in the base body 11. By means of the corresponding locking of the locking screw 15.a, the pressure washer 16.a is pressed against one of the clamping sleeves 20.a facing it and is moved onto the other clamping sleeves 20.b, 20.c while forming a corresponding abutting contact. As a result, a frictional fit is achieved in all abutting cylindrical and conical surfaces and a clamped state of the clamping device 20 is produced. By correspondingly loosening the locking screw 15.a in reverse, the clamped state and thus also the fixed arrangement of the test adapter 10 with the receptacle 224 of the test body 200 can be released.

[0040] Figure 2b A second embodiment is shown. Figure 2a In contrast to the embodiment of the present invention, the pressure washer 16 is designed in the form of a locking nut 15 .b. The locking is then performed by a corresponding mating thread which is arranged in a pin-shaped manner on the end side of the base body 11 .

[0041] Figure 2c A third embodiment is shown. Figure 2aIn contrast to the embodiment of the clamping device 20, the clamping device 20 has only one clamping sleeve 20.a, which has an outwardly directed conical clamping surface. In addition, a correspondingly complementary conical mating surface is formed in the receptacle 224 of the test body 200. In the clamped state of the clamping device 20, the contact contact between the conical surfaces and between the inwardly directed cylindrical surface of the clamping sleeve 20.a and the fixing area 11.b is the contact point to which the force is applied, when a friction fit is formed.

[0042] Figure 2d A fourth embodiment is shown. Figure 2a Unlike the embodiment of the present invention, the counter-receiving portion 14 of the test adapter 10 is provided in the form of an opening which is circular in cross section. Thus, an exemplary embodiment is provided for the support frame 220 of the test body 200 with a pin-shaped cylindrical receiving portion 224. Here, the support body in the region of the pin acts as a pressing element 16.

[0043] Figure 3 A group of different mutually matching test adapters 10, 10.1, 10.2, 10.3, for example two, three or more test adapters, is shown. In this case, all test adapters 10, 10.1, 10.2, 10.3 are generally constructed identically. The differences are manifested in the order of magnitude of the outer diameters d ... D that can be formed on the clamping device 20, so that different test adapters 10, 10.1, 10.2, 10.3 for use on the test body 200 cover different size ranges of the receptacle 224. Alternatively, the individual test adapters 10, 10.1, 10.2, 10.3 can also differ in their basic structure in order to cover different size ranges.

Claims

1. An inspection system (100) for inspecting the local material stiffness at a bearing interface (220) of an inspection body (200), the inspection system comprising at least one inspection adapter (10), on which at least one measuring element (30) for detecting a measured value for determining the material stiffness is at least indirectly arranged, wherein: The inspection adapter (10) has a mating receptacle (14) complementary to the receptacle (224) of the support interface (220), by means of which the inspection adapter (10) can be held in a fixed position in the receptacle (224), characterized in that the inspection adapter (10) has a base body (11) with a fixing area (11.b), on which a clamping device (20) is arranged as the mating receptacle (14), and the clamping device is constructed to hold the inspection adapter (10) in a releasable manner by means of at least one friction lock when the mating receptacle (14) is arranged in the receptacle (224) of the inspection body (200) in a clamped state.

2. The inspection system (100) according to claim 1, characterized in that: The base body (11) has a stop (11.c) on the side facing away from the fixing area (11.b) for determining a fixed holding position of the test adapter (10) in a receptacle of the test body (200).

3. The inspection system (100) according to claim 1 or 2, characterized in that: The fixing area (11.b) of the base body (11) and the clamping device (20) have a common orientation axis (S) for introducing the inspection adapter (10) into the receptacle (224) of the inspection body (11), wherein the friction lock can be formed by at least one clamping force (VK) acting on at least a part of the clamping device (20) in the direction of the orientation axis (S) or parallel to the orientation axis, so that the clamping state of the clamping device (20) is achieved when the matching receptacle (14) of the inspection adapter (10) is arranged in the receptacle (224) of the inspection body (200).

4. The inspection system (100) according to claim 3, characterized in that: The clamping force (VK) causes the clamping device (20) to expand radially relative to the orientation axis (S).

5. The inspection system (100) according to any one of the preceding claims, characterized in that The fixing area (11.b) of the base body (11) is constructed to provide, together with the receptacle (224) of the inspection body (200), a mating part consisting of an opening and a spindle, wherein, when the mating receptacle (14) of the inspection adapter (10) is arranged in the receptacle (224) of the inspection body (200), the spindle is at least partially arranged in the opening, and the clamping device (20) is arranged between the opening and the spindle.

6. The inspection system (100) according to any one of the preceding claims, characterized in that The clamping device (20) includes at least one conical clamping sleeve (20.a, 20.b, 20.c), which has a conical or truncated cone circumferential side surface (20.12) at least partially or completely, wherein a fixed position connection can be formed by means of friction locking only when the circumferential side surface (20.12) has a force-applied abutting contact with the conical mating surface of the accommodating portion of the inspection body (200), the conical mating surface of the fixing area (11.b) of the base body (11) or the conical mating surface of another clamping sleeve (20a, 20b, 20c) of the clamping device (20); otherwise, the connection is loosened in the absence of such abutting contact.

7. The inspection system (100) according to claim 6, characterized in that: The clamping device (20) has at least two, three or more conical clamping sleeves (20.a, 20.b, 20.c) arranged side by side with each other, so that two adjacent clamping sleeves (20.a, 20.b, 20.c) respectively have complementary conical circumferential sides (20.12) facing each other, and one clamping sleeve (20.a, 20.b, 20.c) respectively has an outwardly directed cylindrical surface (20.a2, 20.c2), and the other clamping sleeves (20.a, 20.b, 20.c) have an inwardly directed cylindrical surface (20.b1), wherein in the In the clamped state of the clamping device (20), the abutting contact to which force is applied is respectively formed between the inwardly directed cylindrical surface (20.b1) of the corresponding clamping sleeve (20.a, 20.b, 20.c) and the fixing area (11.b) of the base body (11), between the outwardly directed cylindrical surface (20.a2, 20.c2) of the corresponding clamping sleeve (20.a, 20.b, 20.c) and the receiving portion (224) of the inspection body (200), and between the complementary circumferential side surfaces (20.12) of the corresponding clamping sleeve (20.a, 20.b, 20.c).

8. The inspection system (100) according to any one of claims 3 to 7, characterized in that: The test adapter (10) has a pressing element (16), in particular a pressure washer (16.a), which is arranged adjacent to the clamping device (20) and can be moved relative to the clamping device (20) by means of a locking element (15) that is adjustable relative to the base body (11), so that after abutting contact, the clamping force (VK) can be formed by further movement and the force value of the clamping force is adjustable.

9. The inspection system (100) according to claim 8, characterized in that: The receptacle (224) of the test body (200) and / or the clamping device (20) can be clamped in a sandwich-like manner between the pressing element (16) and a stop (11.c) on the base body (11).

10. The inspection system (100) according to any one of the preceding claims, characterized in that The test adapter (10) comprises, as the at least one measuring element, a measuring sensor, in particular an acceleration sensor, a velocity sensor and / or a force sensor, and / or a measuring surface for scanning by a mechanical or optical position detection system.

11. The inspection system (100) according to any one of the preceding claims, characterized in that The test adapter (10) has a force introduction area (12) which is designed to introduce force pulses of an impacting impulse hammer into the test adapter (10), the force introduction area being particularly integrally formed on the base body (11) and having at least three planar surfaces (13) for introducing force which are oriented in different spatial directions (x, y, z) with respect to one another.

12. The inspection system (100) according to any one of the preceding claims, characterized in that The inspection system (100) comprises a set of at least two or more different inspection adapters (10, 10.a, 10.b, 10.c), wherein the different inspection adapters (10, 10.a, 10.b, 10.c) for use on an inspection body (200) cover receiving portions (224) of different size ranges.

13. The inspection system (100) according to any one of claims 10 to 12, characterized in that: The inspection system (100) has an evaluation unit (40) which determines the effective local material stiffness based on one or more detected sensor values, in particular force values, acceleration values, velocity values ​​and / or path lengths, when the mating receptacle (14) is arranged in a receptacle (224) of the inspection body (200) and after vibration excitation of the inspection adapter (10) and / or the inspection body (200).

14. A method of using an inspection system (100) according to any one of the preceding claims for inspecting the material stiffness of a support interface (220), the support interface in particular belonging to or used for a windshield wiper system, a window lift system, a trunk opening system, a wheel suspension system or a functional inspection table for inspecting functional components or functional structural assemblies, wherein: The inspection table comprises a frame and a support frame connected to the frame, wherein operating conditions of a real operating environment of the functional component or functional assembly are simulated by the frame and the support frame.

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