Test facility

Abstract

Testing device (1; 1') for thermography-based testing of a joint (FV) of a component (B), comprising: an excitation module (10; 10') for thermally exciting a test zone (FV') of the component (B) comprising at least a portion of the joint (FV), a camera module (20; 20') which is configured to be connected to the excitation module (10; 10') and is configured to detect a temperature profile of the test zone (FV') caused by the thermal excitation and to generate a signal corresponding to the temperature profile, and an evaluation module (31.1, 50) which is configured to be connected to the camera module (20; 20') and is configured to evaluate the signal corresponding to the temperature profile, wherein a control arrangement (30) is integrated into the camera module (20; 20'), which is configured to control the excitation module (10; 10') for thermally exciting the test zone (FV'), wherein the evaluation module (31.1, 50) for processing and evaluating the signal corresponding to the temperature profile has a signal processing section (31.1), which is implemented in the control arrangement (30), and a display arrangement (50) which is configured to visually display an evaluation result of the signal corresponding to the temperature profile, generated by the signal processing section (31.1), wherein the camera module (20; 20') has a bolometer camera (35) for detecting the temperature profile of the test zone (FV'), and wherein - the camera module (20; 20') has at least one first quick-coupling section (21), which is designed to establish a detachable mechanical connection with a first quick-coupling counter-section (41) and to establish a detachable electrical connection with an electrical counter-interface (41.3) of the first quick-coupling counter-section (41) via an electrical interface (21.3) of the first quick-coupling section (21), wherein the electrical interface (21.3) of the first quick-coupling section (21) is connected to the signal processing section (31.1) so that a signal corresponding to the evaluation result can be tapped off at the electrical interface (21.3) of the first quick-coupling section (21), and wherein the display arrangement (50) is provided with at least one first quick-coupling counter-section (41), so that the display arrangement (50) is connected to the signal processing section (31.1) for signal transmission.1) is connectable, and / or . - the camera module (20; 20') has at least one second quick-coupling section (22), which is designed to establish a detachable mechanical connection with a second quick-coupling counter-section (42) and to establish a detachable electrical connection with an electrical counter-interface (42.3) of the second quick-coupling counter-section (42) via an electrical interface (22.3) of the second quick-coupling section (22), wherein the electrical interface (22.3) of the second quick-coupling section (22) is connected to the control arrangement (30), and wherein the excitation module (10; 10') is provided with the second quick-coupling counter-section (42), so that the excitation module (10; 10') can be connected to the control arrangement (30) for control, and / or - the camera module (20; 20') has at least one third quick-coupling section (23) which is designed to establish a detachable mechanical connection with a third quick-coupling counter-section (43), and wherein a handle module (60) is provided which is provided with the third quick-coupling counter-section (43) so that the handle module (60) can be detachably attached to the camera module (20; 20'), and / or - the camera module (20; 20') has at least one fourth quick-coupling section (24), which is designed to establish a detachable mechanical connection with a fourth quick-coupling counter-section (44) and to establish a detachable electrical connection with an electrical counter-interface (44.3) of the fourth quick-coupling counter-section (44) via an electrical interface (24.3) of the fourth quick-coupling section (24), wherein the electrical interface (24.3) of the fourth quick-coupling section (24) is connected to the control arrangement (30), and wherein a power supply module (70, 71) with a battery (73) is provided, which power supply module is provided with the fourth quick-coupling counter-section (44) and which has electrical connections which are connected to the electrical counter-interface (44.3) of the fourth quick coupling counter-section (44) are connected, so that the power supply module (70, 71) can be connected to the control arrangement (30) for power supply.

Description

The invention relates to a testing device designed according to the preamble of claim 1 for thermographic-based testing of a joint connection of a component.A testing device of the type mentioned at the beginning is known, for example, from DE 10 2012 008 531 A1.US 2007 / 0290134 A1 discloses a method for characterizing the gas flow by structures of a hollow body.DE 10 2006 023 144 A1 discloses a method for evaluating a body with low thermal conduction while detecting a temperature field of the body, wherein the body is energy-influenced via its surface, simultaneously or subsequently the temperature field of the energy-influenced body is detected and evaluated as a function of the detected temperature field, wherein the influence takes place at low energy.DE 10 2007 055 210 A1 discloses a device for examining the surface of an object, wherein the object is heated by means of an induction heater.Furthermore, US 2008 / 0075139 A1 discloses a thermographic detection system having a camera and a flash light which are spatially separated from one another.Such a conventional test device for thermographically based testing of a joint connection of a component has an excitation module for thermally exciting a test zone of the component and a camera module which is configured to be connected to the excitation module and is configured to record a temporal and spatial temperature profile of the test zone caused by the thermal excitation and to generate a signal corresponding to the temperature profile. The signal can then be processed and, for example, visualized in an evaluation module of the test device.In such conventional test devices, the camera module generally has a semiconductor detector camera which records the temperature profile of the test zone caused by the thermal excitation. However, the disadvantage of such a semiconductor detector camera is its high costs, as a result of which the production outlay for such a checking device is high. In addition, a semiconductor detector camera generally has a relatively large size and a relatively large weight, which prevent or complicate manual operation.The invention is based on the object of developing a testing device according to the preamble of claim 1 in such a way that the manufacturing outlay for the testing device is reduced.This is achieved with a testing device according to claim 1. Further developments of the invention are defined in the dependent claims.According to the invention, a testing device for thermographic-based testing of a joint connection of a component has an excitation module, a camera module and an evaluation module. The excitation module is configured to thermally excite a test zone of the component comprising at least one section of the joint connection. The camera module is configured to be connected to the excitation module and configured to record a temperature profile of the test zone, in particular temporal and spatial temperature profile, caused by the thermal excitation, preferably in reflection and to generate a signal corresponding to the temperature profile. The evaluation module is configured to be connected to the camera module and configured to evaluate the signal corresponding to the temperature profile. The test device according to the invention is characterized in that the camera module has a bolometer camera for detecting the temperature profile of the test zone.The costs for a bolometer camera are many times lower than the costs for a commonly used semiconductor detector camera. Thus, in the test device according to the invention, the manufacturing cost can be significantly reduced.According to one embodiment of the invention, the bolometer camera comprises a bolometer array, preferably embodied as a microbolometer, in particular with integrated cooling (e.g. by one or more Peltier elements), an optical lens system for focusing the thermal radiation emitted from the test zone and a shield for shielding other components from the thermal radiation.With the use of a bolometer array, the measurement sensitivity of the bolometer camera and thus its sensing capability for the temperature profile may be advantageously improved. By combining the bolometer array with, if applicable, a cooling, an optical lens system and a shield in the camera module and the absence of a separate camera housing, the compactness of the testing device may be advantageously increased. By configuring the bolometer array as a microbolometer, the camera size and its weight can be greatly reduced and thus the size and the weight of the test device as a whole can be reduced. This advantageously improves the handling of the test device.In the invention, a control arrangement is integrated into the camera module, which is configured to control the excitation module for thermally exciting the test zone. The evaluation module has a signal processing section for processing and evaluating the signal corresponding to the temperature profile, which is realized in the control arrangement. The evaluation module also has a display arrangement which is configured to visually display an evaluation result of the signal corresponding to the temperature profile, which evaluation result is generated by the signal processing section.By integrating the signal processing section of the evaluation module into the control arrangement of the camera module, the compactness of the test device and thus its handling can be further advantageously increased. By integrating the control for the excitation module into the control arrangement of the camera module, the compactness of the test device can be increased even further. By providing the display arrangement in the evaluation module, the evaluation result of the signal corresponding to the temperature profile can be visually displayed and thus quickly and easily perceived and evaluated by a person checking the joint connection.In the invention, the components excitation module, camera module and display arrangement have respective quick-coupling devices for mechanically and electrically and optionally pneumatic coupling to one another, wherein the quick-coupling devices are each designed such that, when two of these components are mechanically coupled, all electrical connections between the two components are automatically produced.Due to the possibility of being able to selectively couple the components excitation module, camera module and display arrangement to one another and to decouple them from one another, the test apparatus can be disassembled, for example for transport, on the one hand and thus made more transportable and can be flexibly adapted to respective test tasks, on the other hand. For example, depending on the spatial conditions at the test site and / or the shape of the joining part to be tested and the spatial position (e.g. horizontal or vertical) of the joining connection, embodiments of the components excitation module, camera module and / or display arrangement that are adapted with respect to their shape and size can be coupled to one another. In particular, if the excitation module comprises an inductive excitation source, the excitation module can also be provided in different embodiments, such as for different weld shapes or for weld points, and the different embodiments can be coupled to the camera module as required.In the invention, the camera module has at least one first quick-coupling section which is configured to produce a releasable mechanical connection to a first quick-coupling mating section and to produce a releasable electrical connection to an electrical mating interface of the first quick-coupling mating section via an electrical interface of the first quick-coupling section. The electrical interface of the first quick coupling section is electrically connected to the signal processing section, so that a signal corresponding to the evaluation result can be tapped at the electrical interface of the first quick coupling section. The display arrangement is provided with at least one first quick-coupling mating section as described, so that the display arrangement can be connected to the signal processing section for signal transmission.Alternatively or additionally, the camera module has at least one second quick-coupling section, which is configured to produce a releasable mechanical connection to a second quick-coupling mating section and to produce a releasable electrical connection to an electrical mating interface of the second quick-coupling mating section via an electrical interface of the second quick-coupling section. The electrical interface of the second quick-coupling section is electrically connected to the control arrangement. The excitation module is provided with the second quick-coupling mating section, so that the excitation module can be connected to the control arrangement for activation.Alternatively or additionally, the camera module has at least one third quick-coupling section, which is configured to produce a releasable mechanical connection to a third quick-coupling mating section. The test device has a handle module which is provided with the third quick-coupling mating section, so that the handle module can be releasably attached to the camera module.The provision of the handle module advantageously improves the handling of the test device. In other words, in the test mode, the handle module can be gripped by a person testing the joint connection by hand and the components of the test device coupled directly or indirectly to the handle module can be guided and controlled (manually guided) by the hand of the person testing.Alternatively or additionally, the camera module has at least one fourth quick-coupling section, which is configured to produce a releasable mechanical connection to a fourth quick-coupling mating section and to produce a releasable electrical connection to an electrical mating interface of the fourth quick-coupling mating section via an electrical interface of the fourth quick-coupling section. The electrical interface of the fourth quick-coupling section is electrically connected to the control arrangement. The test device has a power supply module with a battery. The power supply module is provided with the fourth quick coupling mating section and has electrical connections which are electrically connected to the electrical mating interface of the fourth quick coupling mating section, such that the power supply module can be connected to the control arrangement for power supply.By this configuration of a power supply module with a battery (in particular a high-power accumulator) as an alternative or in addition to the integration of a battery into the handle module, a further power supply possibility for the test device can be provided. If the power supply module having the fourth quick-coupling mating section is coupled, for example, to a rear side of the camera module and the excitation module is coupled to a front side of the camera module, then the power supply module can advantageously provide a counterweight to the excitation module in test operation and thus improve the handling of the test device.According to a further embodiment of the invention, the excitation module for thermally exciting the test zone has at least one of an optical excitation source, a mechanical excitation source, an electrical excitation source and a convective excitation source. Preferably, the optical excitation source comprises a flash light source, the mechanical excitation source comprises an ultrasonic excitation source, the electrical excitation source comprises an inductive excitation source, and the convective excitation source comprises a cold air excitation source. A use of a cold air excitation source for thermographic testing is described, for example, in DE 20 2006 016 452 U1.The display arrangement preferably has a short-range radio transmitter, on which a first quick-coupling mating section is provided, and a display which is provided with a short-range radio receiver with a power supply (for example a battery) and is electrically connected to the latter for signal transmission. The short-range radio receiver is configured such that it can be coupled to the short-range radio transmitter for short-range radio signal transmission. The display can have, for example, visual glasses equipped with the short-range radio receiver and / or a head-up display equipped with the short-range radio receiver and / or a liquid crystal display (if appropriate as a touchscreen). The display can then be fixed, for example, via a bracelet or fastened to a test part via an adhesive magnet. In addition, measurement data and test results can also be transmitted to a separate computer for further processing or documentation.This embodiment of the invention is particularly advantageous for more extensive testing operations in which the person under test operates his testing activity continuously over longer periods of time. The display can be operated flexibly without a mechanical / electrical connection to the camera module by the wireless connection. The wireless connection of the display and in particular the smart glasses wirelessly coupled to the camera module thereby offer maximum flexibility for the person checking.According to another embodiment of the invention, the display arrangement comprises a display (such as a liquid crystal display panel) which is provided with a first quick coupling mating portion as described and is electrically connected thereto for signal transmission. The display arrangement may also include a touch screen to enable enhanced operation.This embodiment of the invention is particularly advantageous for an occasional random sampling test, in which a person checking not only checks the joints but also works in the environment and the constant setting up and down of, for example, a pair of visual glasses would be disruptive.In order to be able to flexibly attach the display provided with the first quick coupling counter section to the camera module, a plurality of first quick coupling sections can be provided, which are arranged distributed, for example, on an upper side, on two lateral sides and / or on a lower side of the camera module. A section of the display adjacent to the first quick-coupling mating section, such as a swivel foot, is preferably designed in such a way that it allows tilting and rotation of the display with respect to the camera module for use at different viewing angles.The camera module preferably has two second quick-coupling sections as described, so that the excitation module can be releasably attached to the camera module in two different orientations with respect to the latter. The second quick-coupling sections are preferably offset or rotated or arranged rotatably by 90 degrees with respect to one another, such that the excitation module can be releasably attached to the camera module in two alignments rotated by 90 degrees with respect to one another. As a result, the camera module can be adapted in its orientation in an ergonomically favorable manner to joining connections with different spatial positions (e.g. horizontal and vertical).According to an embodiment of the invention, the excitation module can be mechanically separated from the camera module and connected to the camera module via cables for transmission testing.According to one embodiment of the invention, a multifunction operating element can be provided in the handle module with, for example, switching functions on the right, left, top, bottom for navigation in a menu displayed by the display arrangement and with a confirmation and triggering function (for example by means of a pushbutton) for confirming a menu selection or for starting the test operation of the test apparatus.According to a further embodiment of the invention, the components excitation module, camera module, handle module and display arrangement have respective quick-coupling devices for mechanically and electrically coupling to one another, wherein the quick-coupling devices are each designed such that, when two of these components are mechanically coupled, all provided electrical connections between the two components are automatically produced.The at least one third quick-coupling section is preferably configured to establish a releasable electrical connection with an electrical mating interface of the third quick-coupling mating section via an electrical interface of the third quick-coupling section. The electrical interface of the third quick-coupling section is electrically connected to the control arrangement. The test device has a power supply module with a battery. The power supply module is arranged in the handle module and has electrical connections which are electrically connected to the electrical mating interface of the third quick-action coupling mating section, such that the power supply module can be connected to the control arrangement for the purpose of supplying power.By using the handle module as a receptacle for a battery (in particular a high-power battery), a power supply facility can be integrated into the test facility while ensuring high compactness of the test facility. Preferably, a trigger button is also provided on the handle module, by means of which trigger a stimulating operation of the stimulating module and thus a testing operation (including evaluation) of the testing device. The test device can thus be operated conveniently and reliably in a manually guided manner in test operation.In order to be able to attach the handle module flexibly to the camera module, a plurality of third quick-coupling sections can be provided, which are arranged distributed, for example, on the upper side, on the two lateral sides and / or on the lower side of the camera module.According to yet another embodiment of the invention, the power supply module has a fifth quick-coupling section which is configured to produce a releasable mechanical connection to a fifth quick-coupling mating section and to produce a releasable electrical connection to an electrical mating interface of the fifth quick-coupling mating section via an electrical interface of the fifth quick-coupling section. The electrical interface of the fifth quick-coupling section is connected in parallel with the electrical mating interface of the fourth quick-coupling mating section. The test device has a control device with a power supply source and a computer unit. The control device is connected to a supply cable, in which both power supply lines and data lines are integrated. The fifth mating quick-coupling section is provided on the supply cable such that the electrical mating interface of the fifth mating quick-coupling section is electrically connected to the power supply source, such that the power supply source can be connected to the power supply module for the purpose of supplying power. In addition, the fifth mating quick-coupling section is provided on the supply cable in such a way that the electrical mating interface of the fifth mating quick-coupling section is connected to the computer unit of the control device, with the result that data, signals and / or control commands can be transmitted between the computer unit and the components excitation module, camera module, control arrangement, evaluation module, handle module and / or power supply module. With this embodiment of the invention, battery-independent continuous operation of the test device can be ensured.According to one embodiment of the invention, special measures for shielding can be provided on the housing of the camera module. More precisely, a supply cable can be provided on the outside of the housing for inductive excitation by means of the excitation module in order to simplify shielding via the outer housing for protection against electrical radiation or electrical fields generated by inductive pulses.In fact, according to embodiments of the invention, at least the components excitation module, camera module and display arrangement and, if provided, also the components handle module, power supply module and supply cable can be coupled to one another both mechanically and electrically via their respective quick-coupling devices (quick-coupling section and associated quick-coupling mating section) without the use of tools. The quick coupling devices are each designed such that when two components are mechanically coupled, all provided electrical connections between the two components are automatically produced.According to embodiments of the invention, a testing device for manually guided thermographic-based testing of a joint connection of a component is provided, wherein the testing device has the highest flexibility in adaptation to respective testing tasks due to free mechanical and electrical connectivity and decoupling of its components (modularization). Due to the low weight and the ergonomically advantageous embodiment (in particular with handle module), the test device can be operated in a flexible, hand-guided manner at a wide variety of locations without robot support (and thus without special safety measures such as enclosures and with reduced costs).The invention expressly also extends to such embodiments which are not given by combinations of features from explicit references back to the claims, whereby the disclosed features of the invention can be combined with one another as desired, insofar as this is technically expedient.The invention will be described below with reference to preferred embodiments and with reference to the attached figures. FIG. 1 shows a perspective view of a testing device according to an embodiment of the invention. FIG. 2 ashows a front view of components of the test device of FIG. 1. FIG. 2 bshows a side view of components of the test device of FIG. 1. FIG. 3 shows a plan view of components of the test device of FIG. 1. FIG. 4 shows a lateral sectional view of a camera module of the checking device of FIG. 1. FIG. 5 shows a broken-away sectional view of a quick coupling section with the quick coupling mating section coupled on of the testing device of FIG. 1. FIG. 6 shows a broken-away plan view of the camera module and the excitation module of the test device of FIG. 1. FIG. 7 ashows a cross-sectional view of components of a testing device according to a further embodiment of the invention. FIG. 7 bshows a side view of components of the test device of FIG. 7 a. FIG. 8 shows a plan view of components of the test device of FIG. 7 a.FIGS. 1 to 6 show in different views a testing device 1 designed according to an embodiment of the invention for manually guided thermographic-based testing of a joint connection FV of a component B. The joint connection FV is preferably designed as a welded connection and in particular as a resistance spot welded connection or laser welded connection.The test device 1 has an excitation module 10 for thermally exciting a test zone FV' of the component B comprising at least a portion of the joint connection FV, a camera module 20, an evaluation module 31.1, 50, a handle module 60 and a power supply module 70.According to the invention, the excitation module 10 for thermally exciting the test zone FV' may comprise at least one of an optical excitation source, a mechanical excitation source, an electrical excitation source and a convective excitation source. According to this embodiment of the invention, the excitation module 10 has an electrical excitation source in the form of an inductive excitation source. Such an inductive excitation source is described, for example, in DE 10 2012 008 531 A1, so that further details regarding the structure and mode of operation of the inductive excitation source can be gathered from this document, for example. It is particularly advantageous in the realization of the excitation module 10 with the inductive excitation source that the inductive excitation source can generate a strong temperature swing in the test zone FV' of the component B and thus a distinct temperature profile in the test zone FV'.The camera module 20 is configured to be connected to the excitation module 10 and is configured to record the temperature profile of the test zone FV' caused by the thermal excitation of the excitation module 10 in reflection and to generate a signal corresponding to the temperature profile.For detecting the temperature profile of the test zone FV', a bolometer camera 35 is integrated into a housing 20.1 of the camera module 20, as shown in FIG. 4, which bolometer camera comprises a bolometer array 35.1, preferably embodied as a microbolometer, including cooling (e.g. Peltier elements), an optical lens system 35.2 for focusing the thermal radiation emitted by the test zone FV', and a shield 35.3 for shielding the components arranged next to the bolometer camera 35 in the housing 20.1 from the thermal radiation. The housing 20.1 of the camera module 20 is preferably rubberised from the outside and designed to be impact-resistant.In order to be able to pass the heat radiation unimpeded towards the bolometer camera 35, a housing 11 of the excitation module 10 comprises a viewing window 11.1 (see FIG. 2 a ) formed in the form of a central passage, and the housing 20.1 of the camera module 20 comprises a viewing window 20.2 made of e.g. germanium, which is transmissive for heat radiation or infrared radiation. During operation of the test device 1, the viewing window 11.1 of the housing 11 of the excitation module 10, the viewing window 20.2 of the housing 20.1 of the camera module 20 and the bolometer camera 35 are then arranged in an alignment or line of sight.The evaluation module 31.1, 50 is in turn configured to be connected to the camera module 20 and is configured to evaluate the signal corresponding to the temperature profile of the test zone FV'. In detail, a control arrangement 30 is integrated into the camera module 20, which is configured to control the excitation module 10 for thermally exciting the test zone FV'. The evaluation module 31.1, 50 has, for processing and evaluating the signal corresponding to the temperature profile, a signal processing section 31.1, which is realized in the control arrangement 30, and a display arrangement 50, which is configured to visually display an evaluation result of the signal corresponding to the temperature profile, which evaluation result is generated by the signal processing section 31.1.The control arrangement 30 has a preferably not actively cooled microcomputer 31 for controlling the components of the test device 1 and for processing and evaluating the data and signal currents generated in the test device 1. For processing and evaluating the signal of the camera module 20 corresponding to the temperature profile, the signal processing section 31.1 is implemented in the microcomputer 31. The control arrangement 30 also has a voltage converter 32 for adapting the supply voltage available in each case to the operating voltage required for the components of the test device 1, and a communication unit 33 for signal processing for the display arrangement 50. For the indirect cooling of the components accommodated in the housing 20.1 of the camera module 20, a passive cooling element 20.3 can be attached to the outside of the housing 20.1.As can be seen from FIG. 4, the microcomputer 31, the communication unit 33, and the bolometer camera 35 are electrically connected to the voltage converter 32 via electrical lines (not separately labeled), respectively, for supplying power thereto. Furthermore, the bolometer array 35.1, the optical lens system 35.2 and the communication unit 33 for data, signal and control command transmission are connected to the microcomputer 31 via electrical lines (not separately labeled).The display arrangement 50 has a first display 51, for example in the form of a liquid crystal display panel, a short-range radio transmitter 52, for example in the form of a Bluetooth unit, and a second display 53, for example in the form of smart glasses. The second display 53, which is designed as smart glasses, is equipped with a short-range radio receiver 54 for coupling to the short-range radio transmitter 52. Alternatively or additionally to the smart glasses, the second display 53 can also have a head-up display (not shown) with the short-range radio receiver 54, for example.The power supply module 70 can comprise a first power supply unit 71 with a housing 72, in which a battery 73 in the form of a high-power accumulator is accommodated, and / or a second power supply unit 74 with a battery 75 in the form of a high-power accumulator, wherein the battery 75 of the second power supply unit 74 is accommodated in a housing 61 of the handle module 60.As can be seen from FIGS. 1 to 4, the housing 20.1 of the camera module 20 has a cuboid shape with six outer main surfaces. As can be seen in particular from FIGS. 1 and 4, the camera module 20 has at least one first quick-coupling section 21 on its housing 20.1 (shown here on an upper side), which is configured to produce a releasable mechanical connection to a first quick-coupling mating section 41 (see FIG. 5 ). For this purpose, as shown in FIGS. 4 and 5, the first quick-coupling section 21 has a depression 21.1 formed with an undercut and a magnet 21.2 (preferably made of neodymium) let into the housing 20.1. Furthermore, the first quick-coupling mating section 41 has a hook-shaped projection 41.1, which can be brought into engagement in the depression 21.1 with the undercut being engaged behind, and a magnet 41.2 (preferably made of neodymium), which is embodied in a polarity opposite to the magnet 21.2 of the first quick-coupling section 21. The first quick coupling section 21 is also configured to establish a releasable electrical connection with an electrical mating interface 41.3 of the first quick coupling mating section 41 via an electrical interface 21.3 (only schematically illustrated in FIG. 4 ) of the first quick coupling section 21.The electrical interface 21.3 of the first quick coupling section 21 is electrically connected via the communication unit 33 to the signal processing section 31.1 of the evaluation module 31.1, 50 realized in the microcomputer 31, so that a signal corresponding to the evaluation result (which is based on the temperature profile of the test zone FV' captured by the bolometer camera 35) can be tapped at the electrical interface 21.3 of the first quick coupling section 21. For the purpose of supplying power, the electrical interface 21.3 of the first quick-coupling section 21 is also electrically connected to the voltage converter 32. The display arrangement 50 is provided with at least one first quick coupling mating section 41 as described above, so that the display arrangement 50 can be connected to the signal processing section 31.1 for signal transmission.More specifically, the first display 51 of the display arrangement 50 has, on a rotary foot 51.1 attached thereto, a first quick-coupling mating section 41 as described above and is electrically connected to its electrical mating interface 41.3 for signal transmission. The first display 51 can thus be electrically coupled mechanically and simultaneously to the camera module 20 and the evaluation result provided by the signal processing section 31.1 of the evaluation module 31.1, 50 in the form of a signal can thereby be visually displayed on the first display 51 of the display arrangement 50. The rotation foot 51.1 is designed such that it allows tilting and rotation of the first display 51 with respect to the camera module 20 for use at different viewing angles.In order to be able to flexibly attach the first display 51 to the housing 20.1 of the camera module 20, a plurality of first quick-coupling sections 21 can also be provided (although not shown in the figures), which are arranged distributed, for example, on the upper side, on the two lateral sides and / or on the lower side of the housing 20.1 of the camera module 20. In other words, according to one configuration, the first display 51 can be selectively locked to each of the four sides of the upper side, the lateral side, and the lower side of the camera module 20 by quick attachment.In order to have an alternative display possibility, the short-range radio transmitter 52 of the display arrangement 50 likewise has a first quick-coupling mating section 41 as described above and is electrically connected to its electrical mating interface 41.3 for signal transmission. The short-range radio transmitter 52 can thus be mechanically and simultaneously electrically coupled to the camera module 20 and the evaluation result provided by the signal processing section 31.1 of the evaluation module 31.1, 50 in the form of a signal can thereby be converted into a radio signal.The second display 53, which is embodied as smart glasses, for example, can receive the radio signal via its short-range radio receiver 54, which is electrically coupled for signal transmission and can be coupled to the short-range radio transmitter 52 for short-range radio signal transmission, and, after conversion thereof into a graphic signal, can visually display the evaluation result provided by the signal processing section 31.1 of the evaluation module 31.1, 50.The camera module 20 has at least one second quick-coupling section 22 on its housing 20.1 (shown here on a front side), which is configured to produce a releasable mechanical connection to a second quick-coupling mating section 42 and to produce a releasable electrical connection to an electrical mating interface 42.3 of the second quick-coupling mating section 42 via an electrical interface 22.3 of the second quick-coupling section 22. The second quick coupling section 22 is formed similarly to the first quick coupling section 21 and accordingly has a corresponding depression 22.1, a corresponding magnet 22.2 and the electrical interface 22.3. The second quick-coupling mating section 42 is also configured similarly to the first quick-coupling mating section 41 and accordingly has a corresponding hook-shaped projection 42.1, a corresponding magnet 42.2 and the electrical mating interface 42.3, as shown in FIG. 5.The electrical interface 22.3 of the second quick coupling section 22 is electrically connected to the microcomputer 31 and the voltage converter 32 of the control arrangement 30. The excitation module 10 is provided on its housing 11 with the second quick-coupling mating section 42 so that the excitation module 10 can be connected to the control arrangement 30 for activation and power supply. In other words, the excitation module 10 can be coupled mechanically and simultaneously electrically releasably to the camera module 20 by coupling its second quick-coupling mating section 42 to the second quick-coupling section 22 provided on the housing 20.1 of the camera module 20.Although not visible in the figures, the camera module 20 preferably has, on the front side of its housing 20.1, two second quick-coupling sections 22 as described, which are arranged offset or rotated by 90 degrees with respect to one another, so that the excitation module 10 can be releasably attached to the camera module 20 in two different orientations (rotated by 90 degrees) with respect to the latter. As a result, the orientation of the camera module 20 can be adapted in an ergonomically favorable manner to joining connections FV with different spatial positions (e.g. horizontal and vertical).As shown in FIG. 6, according to a preferred embodiment of the invention, the housing 20.1 of the camera module 20 can have a widening flange 20.4 on its front side provided with the at least one second quick-coupling section 22. The widening flange 20.4 is dimensioned such that it provides the housing 11 of the excitation module 10 with a support base which is widened compared to the cuboid basic contour of the housing 20.1 of the camera module 20 and has an increased contact area and longer lever arms for increasing the rigidity. Moreover, as shown in FIG. 6, each second quick coupling portion 22 and each second mating quick coupling portion 42 may be provided with, for example, four magnets 22.2 and 42.2, respectively, so that the holding force of the quick coupling is increased.In order to be able to adapt the excitation module 10 flexibly to different component geometries, so that optimal conditions for the thermal excitation are always provided, according to an embodiment of the invention not shown in the figures, the front side of the excitation module 10 facing the component B can likewise have one or more quick-coupling sections, which can be coupled to flexible front plates having respective quick-coupling counter sections.The front plates can have spacers adapted to the respective component geometry, so that a constant and tilt-free distance of the excitation module 10 from the component B is ensured. Furthermore, an e.g. electronic coding (e.g. an RFID transponder) can be integrated into each of the front plates, which coding can be read out by the control arrangement 30 by means of a suitable reading device integrated therein when the front plates are installed. Data can be stored in the microcomputer 31 for each coding, which preset excitation parameters (such as pulse duration, current intensity, frequency, etc.) determined for each coding. The excitation parameters can be automatically adopted for the operation of the test device 1 when the respective coding is detected. Thus, optimum conditions for the thermal excitation can always be realized.The camera module 20 has at least one third quick-coupling section 23 on its housing 20.1 (shown here on an underside), which is configured to produce a releasable mechanical connection to a third quick-coupling mating section 43 and to produce a releasable electrical connection to an electrical mating interface 43.3 of the third quick-coupling mating section 43 via an electrical interface 23.3 of the third quick-coupling section 23. The third quick coupling section 23 is formed similar to the first quick coupling section 21 and accordingly has a corresponding depression 23.1, a corresponding magnet 23.2 and the electrical interface 23.3. The third mating quick-coupling section 43 is also configured similarly to the first mating quick-coupling section 41 and therefore has a corresponding hook-shaped projection 43.1, a corresponding magnet 43.2 and the electrical mating interface 43.3, as shown in FIG. 5.The electrical interface 23.3 of the third quick-coupling section 23 is electrically connected to the microcomputer 31 and the voltage converter 32 of the control arrangement 30. The handle module 60 is provided on its housing 61 with the third quick-coupling mating section 43 so that the handle module 60 can be coupled mechanically and simultaneously electrically releasably to the camera module 20. In the test mode, the handle module 60 can be gripped by a person testing the joint connection FV by hand and the components of the test device 1 coupled directly or indirectly to the handle module 60 can be guided and controlled (manually guided) by the hand of the person testing.More specifically, the second power supply unit 74 of the power supply module 70 arranged in the handle module 60 and provided with the battery 75 has electrical connections (not shown), which are electrically connected to the electrical mating interface 43.3 of the third quick-coupling mating section 43, so that the second power supply unit 74 of the power supply module 70 can be connected to the control arrangement 30 for power supply purposes. In addition, a trigger button (not shown) is preferably provided on the housing 61 of the handle module 60, by means of which trigger a stimulating operation of the stimulating module 10 and thus a testing operation (including evaluation) of the testing device 1 can be triggered.In order to be able to attach the handle module 60 flexibly to the housing 20.1 of the camera module 20, (although not shown in the figures) a plurality of third quick-coupling sections 23 can also be provided, which are arranged distributed, for example, on the upper side, on the two lateral sides and / or on the lower side of the housing 20.1 of the camera module 20.In other words, according to one configuration, the handle module 60 can be selectively locked to each of the four sides of the upper side, lateral sides, and lower side of the camera module 20 by quick attachment.In addition, although not shown in the figures, a pivot joint can be integrated into the handle module 60 between its third quick-coupling mating section 43 and the adjoining part of the housing 61, by means of which pivot joint the handle module 60 can be rotated, if required, for example by 90 degrees about its longitudinal axis relative to the camera module 20.The camera module 20 has at least one fourth quick-coupling section 24 on its housing 20.1 (shown here on a rear side), which is configured to produce a releasable mechanical connection to a fourth quick-coupling mating section 44 and to produce a releasable electrical connection to an electrical mating interface 44.3 of the fourth quick-coupling mating section 44 via an electrical interface 24.3 of the fourth quick-coupling section 24. The fourth quick coupling section 24 is formed similarly to the first quick coupling section 21 and accordingly has a corresponding depression 24.1, a corresponding magnet 24.2 and the electrical interface 24.3. The fourth mating quick-coupling section 44 is also configured similarly to the first mating quick-coupling section 41 and accordingly has a corresponding hook-shaped projection 44.1, a corresponding magnet 44.2 and the electrical mating interface 44.3, as shown in FIG. 5.The electrical interface 24.3 of the fourth quick coupling section 24 is electrically connected to the microcomputer 31 and the voltage converter 32 of the control arrangement 30. The first power supply unit 71 of the power supply module 70 provided with the battery 73 is provided with the fourth quick-coupling mating portion 44 on its housing 72, so that the first power supply unit 71 of the power supply module 70 can be coupled mechanically and simultaneously electrically detachably to the camera module 20.More specifically, the first power supply unit 71 of the power supply module 70 has electrical terminals (not shown) electrically connected to the electrical mating interface 44.3 of the fourth quick-coupling mating portion 44, such that the first power supply unit 71 of the power supply module 70 is connectable to the control arrangement 30 for power supply. Furthermore, data lines (not shown) for data, signal and / or control command transmission are provided in the first power supply unit 71 of the power supply module 70, wherein the data lines are likewise electrically connected to the electrical mating interface 44.3 of the fourth quick-coupling mating section 44, such that data, signals and / or control commands can be transmitted between the first power supply unit 71 of the power supply module 70 and the control arrangement 30.Preferably, the first power supply unit 71 of the power supply module 70 also has a power supply interface in the electrical mating interface 44.3 of its fourth quick-coupling mating section 44, which power supply interface can be coupled to a corresponding power supply interface in the electrical interface 24.3 of the fourth quick-coupling section 24. As can be seen from FIG. 4, this power supply interface in the electrical interface 24.3 of the fourth quick-coupling section 24 is then directly electrically connected to a corresponding power supply interface in the electrical interface 22.3 of the second quick-coupling section 22 via a continuous power supply line 34. In the electrical mating interface 42.3 of the second quick-coupling mating section 42 provided on the excitation module 10, a corresponding power supply interface is in turn provided for coupling to the power supply interface in the electrical interface 22.3 of the second quick-coupling section 22. The power supply for the inductive power of the excitation module 10 can thus be looped or passed directly through the camera module 20 and thus does not impair the control arrangement 30 or the bolometer camera 35.The coupling of the first power supply unit 71 of the power supply module 70 provided with the battery 73 to the rear side of the camera module 20 advantageously provides a counterweight to the excitation module 10 coupled to the front side of the camera module 20 in the assembled state.The first power supply unit 71 of the power supply module 70 has, on a rear side of its housing 72, a fifth quick-coupling section 25 which is configured to produce a releasable mechanical connection to a fifth quick-coupling mating section 45 and to produce a releasable electrical connection to an electrical mating interface 45.3 of the fifth quick-coupling mating section 45 via an electrical interface 25.3 of the fifth quick-coupling section 25. The fifth quick coupling section 25 is formed similarly to the first quick coupling section 21 and accordingly has a corresponding depression 25.1, a corresponding magnet 25.2 and the electrical interface 25.3. The fifth mating quick-coupling section 45 is also configured similarly to the first mating quick-coupling section 41 and accordingly has a corresponding hook-shaped projection 45.1, a corresponding magnet 45.2 and the electrical mating interface 45.3, as shown in FIG. 5.The electrical interface 25.3 of the fifth quick-coupling section 25 is connected in parallel with the electrical mating interface 44.3 of the fourth quick-coupling mating section 44. That is, the electrical interface 25.3 of the fifth quick coupling portion 25 is connected to both the electrical terminals to the battery 73 of the first power supply unit 71 of the power supply module 70 and the data lines in the first power supply unit 71 of the power supply module 70.The test device 1 can have an external control device 80 with a power supply source (not separately designated) for external power supply and a computer unit (not separately designated) for external control of excitation module 10, camera module 20, control arrangement 30, evaluation module 31.1, 50, handle module 60 and power supply module 70 and for data evaluation.The control device 80 is connected to a power cable 81 in which both power supply lines and data lines (both not shown) are integrated. On the supply cable 81, the fifth mating quick-coupling section 45 is provided such that the electrical mating interface 45.3 of the fifth mating quick-coupling section 45 is electrically connected to the power supply source of the control device 80 such that the power supply source can be connected to the power supply module 70 for power supply. In addition, the fifth mating quick-coupling section 45 is provided on the supply cable 81 in such a way that the electrical mating interface 45.3 of the fifth mating quick-coupling section 45 is connected to the computer unit of the control device 80, with the result that data, signals and control commands can be transmitted between the computer unit of the control device 80 and the components excitation module 10, camera module 20, control arrangement 30, evaluation module 31.1, 50, handle module 60 and power supply module 70.In practice, all components of excitation module 10, camera module 20, display arrangement 50, handle module 60, power supply module 70 and supply cable 81 can be locked or coupled to one another both mechanically and electrically via their respective quick-coupling devices (quick-coupling section and associated quick-coupling mating section) without the use of tools. In the case of mechanical coupling, all electrical connections between the components are automatically produced.Components of excitation module 10, camera module 20, display arrangement 50, handle module 60, power supply module 70 and supply cable 81 that are to be permanently connected to one another can, according to a modification, be connected to one another via a coupling device in which the mechanical connection is produced, for example, by a screw connection. The electrical interfaces and mating interfaces are designed analogously to the quick coupling device.Now, with reference to FIGS. 7 a, 7 band 8, a testing device 1' designed according to a further embodiment of the invention for manually guided thermographic-based testing of a joint connection FV of a component B (see FIG. 1 ) will be described. Since the test device 1' according to FIGS. 7a, 7b and 8 is identical to the test device 1 according to FIGS. 1 to 6 except for a few differences, only these differences will be shown below. In this case, identical or similar components of the test device 1' according to FIGS. 7a, 7b and 8 to the test device 1 according to FIGS. 1 to 6 are denoted by identical or similar reference numerals (with an added apostrophe).The test device 1' has a modified excitation module 10' for thermally exciting the test zone FV' of the component B and a modified camera module 20'. According to this embodiment of the invention, the excitation module 10' has a convective excitation source in the form of a cold air excitation source. The housing 11' of the excitation module 10' is designed as a hollow body (preferably made of carbon fiber-reinforced plastic), so that at least a part of the interior of the housing 11' provides a cold air tank of about 1 liter capacity. A use of a cold air excitation source for thermographic testing is described, for example, in DE 20 2006 016 452 U1 and in EP 1 914 542 B1.As can be seen from FIG. 7b, the housing 11' of the excitation module 10' is formed in an angular or L-shaped manner, wherein in the assembled state the longer leg spans the top side of the housing 20.1' of the camera module 20' and the shorter leg spans the front side of the housing 20.1' of the camera module 20'. The region of the longer leg preferably forms the cold air tank, wherein control components such as e.g. electromagnetic valves and measurement sensors are arranged in the region of the shorter leg.The releasable electrical and mechanical coupling of the excitation module 10' to the camera module 20' is preferably realized again via at least one second quick-coupling section 22 on the front side of the housing 20.1' of the camera module 20' and a second quick-coupling counter section 42 on an inner angle side of the shorter limb of the housing 11' of the excitation module 10'.Here too, although not visible in the figures, the camera module 20' preferably has, on the front side of its housing 20.1', two second quick-coupling sections 22 as described, which are arranged offset or rotated by 90 degrees with respect to one another, so that the excitation module 10' can be releasably attached to the camera module 20' in two different alignments (rotated by 90 degrees) with respect to the latter.On the outside angle side of the shorter leg 11' of the excitation module 10' forming the front side, an electromagnetically controllable cold air outlet valve 12' is provided, to which a cold air hose 13' is connected by its one longitudinal end. Connected to the other longitudinal end of the cold air hose 13' is a cold air outlet nozzle 14', via which, when the cold air outlet valve 12' is open, cold air is discharged from the cold air tank for thermal excitation (here cooling) to the test zone FV' of the component B.On the outside angle side of the shorter leg or the front side of the housing 11' of the excitation module 10', a holder 15' is also attached, which extends away from the front side of the housing 11' at a predetermined angle and on which the cold air outlet nozzle 14' is securely supported and held in a defined position. In addition, on the outer angle side of the shorter leg or the front side of the housing 11' of the excitation module 10', two spacers 16', 16' are provided, which extend at right angles away from the front side of the housing 11' and which are to be placed on the component B during the test operation in order to ensure a defined distance of the cold air outlet nozzle 14' from the test zone FV' of the component B.In addition, an angle sensor system 17' is provided on the outer angle side of the shorter leg or on the front side of the housing 11' of the excitation module 10', by means of which sensor system an angle of inclination or angle of incidence of the cold air outlet nozzle 14' with respect to the test zone FV' of the component B can be determined during test operation. This angle of inclination monitoring advantageously ensures an optimum angle of incidence of the cold air outlet nozzle 14' on the test zone FV' of the joint connection FV of the component B. For this purpose, the angle sensor system 17' can preferably have, for example, two laser distance sensors (not shown), which each determine the distance from the laser distance sensor to a point, for example, shortly above or shortly below (in the case of a horizontal course of the joint connection FV) the test zone FV'. From the difference between the two distances, the angle of inclination of the cold air outlet nozzle 14' is then determined, for example, in the microcomputer 31.On the first display 51 and / or the second display 53 of the display arrangement 50, the angle of inclination or the angular position of the cold air outlet nozzle 14' can then be visualized, for example, as a level display. By tilting the excitation module 10' (held in a hand-guided manner on the handle module 60), the "level" can then be adjusted, for example, into the central position and thus a predefined or optimum angular position of the cold air outlet nozzle 14' with respect to the test zone FV'.List of reference characters1; 1' Test device 10; 10' Excitation module 11; 11' Housing 11.1 Viewing window 12' Cold air outlet valve 13' Cold air tube 14' Cold air outlet nozzle 15' Holder 16' Spacer 17' Angle sensor system 20; 20' Camera module 20.1; 20.1' Housing 20.2 Viewing window 20.3 Cooling element 20.4 Widening flange 21 Quick-coupling section 21.1 Depression 21.2 Magnet 21.3 Electrical interface 22 Quick-coupling section 22.1 Depression 22.2 Magnet 22.3 Electrical interface 23 Quick-coupling section 23.1 Depression 23.2 Magnet 23.3 Electrical interface 24 Quick-coupling section 24.1 Depression 24.2 Magnet 24.3 Electrical interface 25 Quick-coupling section 25.1 Depression 25.2 Magnet 25.3 Electrical interface 30 Control arrangement 31 Microcomputer 31.1 Signal processing section (evaluation module) 32 Voltage converter 33 Communication unit 34 Power supply line 35 Bolometer camera 35.1 Bolometer array 35.2 Lens system 35.3 Shield 41 Quick-coupling mating section 41.1 Projection 41.2 Magnet 41.3 Electrical Mating interface 42 Quick-coupling mating section 42.1 Projection 42.2 Magnet 42.3 Electrical mating interface 43 Quick-coupling mating section 43.1 Projection 43.2 Magnet 43.3 Electrical mating interface 44 Quick-coupling mating section 44.1 Projection 44.2 Magnet 44.3 Electrical mating interface 45 Quick-coupling mating section 45.1 Projection 45.2 Magnet 45.3 Electrical mating interface 50 Display arrangement (evaluation module) 51 Display 51.1 Rotary foot 52 Short-range radio transmitter 53 Display 54 Short-range radio receiver 60 Handle module 61 Housing 70 Power supply module 71 Power supply unit 72 Housing 73 Battery 74 Power supply unit 75 Battery 80 Control device 81 Supply cable B Component FV Joint FV' Test zone

Claims

Test device (1; 1') for thermographically based testing of a joint connection (FV) of a component (B), comprising: an excitation module (10; 10') for thermally exciting a test zone (FV') of the component (B) comprising at least a portion of the joint connection (FV), a camera module (20; 20') which is configured to be connected to the excitation module (10; 10') and is configured to record a temperature profile of the test zone (FV') caused by the thermal excitation and to generate a signal corresponding to the temperature profile, and an evaluation module (31.1, 50) which is configured to be connected to the camera module (20; 20') and configured to evaluate the signal corresponding to the temperature profile, wherein a control arrangement (30) is integrated into the camera module (20; 20') and is configured to control the excitation module (10; 10') for thermally exciting the test zone (FV'), wherein the evaluation module (31.1, 50) for processing and evaluating the signal corresponding to the temperature profile has a signal processing section (31.1) which is realized in the control arrangement (30), and a display arrangement (50) configured to visually display an evaluation result of the signal corresponding to the temperature profile generated by the signal processing section (31.1), wherein the camera module (20; 20') for detecting the temperature profile of the test zone (FV') has a bolometer camera (35), and wherein - the camera module (20; 20') has at least one first quick-coupling section (21) which is configured to produce a releasable mechanical connection to a first quick-coupling mating section (41) and to produce a releasable electrical connection via an electrical interface (21.3) of the first quick-coupling section (21) to an electrical mating interface (41.3) of the first quick-coupling mating section (41), wherein the electrical interface (21.3) of the first quick-coupling section (21) is connected to the signal processing section (31.1), such that a signal corresponding to the evaluation result can be tapped at the electrical interface (21.3) of the first quick-coupling section (21), and wherein the display arrangement (50) is provided with at least one first quick-coupling mating section (41), such that the display arrangement (50) can be connected to the signal processing section (31.1) for the purpose of signal transmission, and / or - the camera module (20; 20') has at least one second quick coupling section (22), which is configured to produce a releasable mechanical connection to a second quick coupling mating section (42) and to produce a releasable electrical connection via an electrical interface (22.3) of the second quick coupling section (22) to an electrical mating interface (42.3) of the second quick coupling mating section (42), wherein the electrical interface (22.3) of the second quick coupling section (22) is connected to the control arrangement (30), and wherein the excitation module (10; 10') is provided with the second quick coupling mating section (42), such that the excitation module (10; 10') can be connected to the control arrangement (30) for activation, and / or - the camera module (20; 20') has at least one third quick-coupling section (23), which is configured to produce a releasable mechanical connection to a third quick-coupling mating section (43), and wherein a handle module (60) is provided, which is provided with the third quick-coupling mating section (43), such that the handle module (60) can be releasably attached to the camera module (20; 20'), and / or - the camera module (20; 20') has at least one fourth quick-coupling section (24), which is configured to produce a releasable mechanical connection to a fourth quick-coupling mating section (44) and to produce a releasable electrical connection via an electrical interface (24.3) of the fourth quick-coupling section (24) to an electrical mating interface (44.3) of the fourth quick-coupling mating section (44), wherein the electrical interface (24.3) of the fourth quick-coupling section (24) is connected to the control arrangement (30), and wherein a power supply module (70, 71) is provided with a battery (73), which is provided with the fourth quick-coupling mating section (44) and which has electrical connections, which are connected to the electrical mating interface (44.3) of the fourth quick-coupling mating section (44), such that the power supply module (70, 71) can be connected to the control arrangement (30) for the purpose of supplying power.The testing device (1; 1') according to claim 1, wherein the display arrangement (50) comprises a short-range radio transmitter (52) on which a first fast-coupling mating portion (41) is provided and a display (53) which is provided with a short-range radio receiver (54) and is connected thereto for signal transmission, and wherein the short-range radio receiver (54) is configured such that it can be coupled to the short-range radio transmitter (52) for short-range radio signal transmission.Test device (1; 1') according to claim 1 or 2, wherein the display arrangement (50) comprises a display (51) which is provided with a first quick coupling mating section (41) and is connected thereto for signal transmission.Test device (1; 1') according to one of the preceding claims, wherein the camera module (20; 20') has two second quick-coupling sections (22), such that the excitation module (10; 10') can be releasably attached to the camera module (20; 20') in two different orientations with respect to the latter.The testing device (1; 1') according to any one of the preceding claims, wherein the at least one third quick coupling section (23) is configured to establish a releasable electrical connection with an electrical mating interface (43.3) of the third quick coupling mating section (43) via an electrical interface (23.3) of the third quick coupling section (23), wherein the electrical interface (23.3) of the third quick coupling section (23) is connected to the control arrangement (30), wherein a power supply module (70, 74) with a battery (75) is provided, and wherein the power supply module (70, 74) is arranged in the handle module (60) and has electrical connections which are connected to the electrical mating interface (43.3) of the third quick coupling mating section (43), such that the power supply module (70, 74) can be connected to the control arrangement (30) for the purpose of supplying power.

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