DE102020205640A1 - Monitoring device for a manufacturing plant, manufacturing plant and process - Google Patents

Abstract

Monitoring device 17 for a powder bed-based production plant 1, the production plant 1 having a plant room 5 and being designed to produce a component 2 generatively and / or in layers in the plant room 5 by means of melting and solidification of a powder bed 4, with a dynamic vision sensor 18 and a Evaluation module 19, wherein the dynamic vision sensor 18 has a detection area 20 and is arranged to detect at least one section of the powder bed 4 with the detection area 20 by sensors and is designed to detect and provide a local change in brightness as event data, the evaluation module 19 the event data are provided and the evaluation module 19 is designed to monitor the manufacturing plant 1, the plant room 5, the melting, the solidification, the powder bed 4, the manufacture and / or a manufacturing process step based on the event data.

Description

State of the art

The invention relates to a monitoring device for a manufacturing plant, the manufacturing plant being designed to produce a component layer by layer based on selective melting of a powder bed with an energy-rich beam, the monitoring device being designed to monitor the manufacturing plant and / or the manufacturing process.

A device for the layer-by-layer, generative production of a component is from the publication DE 10 2016 225 616 A1 known. The device described has two heating devices which increase the temperature of the powder bed at two spatially separate areas of action, with a high-energy beam locally melting the powder bed. The device provides that, during the production of the components by means of the heating device, targeted, local heating of the powder bed takes place at the point that is to be melted immediately afterwards by means of the jet.

Disclosure of the invention

In the context of the invention, a monitoring device having the features of claim 1 is proposed. Furthermore, a production plant with the features of claim 10 and a method for monitoring a production plant with the features of claim 15 are proposed. Further advantages, effects and configurations emerge from the subclaims, the description and the attached figures.

The invention is based on the object of providing a monitoring device for a production plant which enables the production plant to be used in an economically efficient manner, in particular also for series production. It is also an object of the invention to enable a controlled process control of the manufacturing method based on sensor monitoring of the manufacturing method. In particular, the monitoring device enables cost-effective sensor monitoring with high temporal resolution and a reduced amount of data, in particular a reduced amount of image data. In particular, with a reduced amount of data, sensor monitoring and data storage, for example for quality assurance purposes, is also possible for manufacturing processes that last several hours or days.

A monitoring device for a powder bed-based production system is proposed. The monitoring device can, in particular, be integrated, integrated and / or retrofitted into the production system. The monitoring device is designed to monitor the manufacturing plant, a manufacturing method of the manufacturing plant and / or a process step. For example, the monitoring device is designed to carry out and / or support monitoring for quality assurance, regulation, in particular process regulation, and / or operational safety.

The manufacturing plant has a plant room. In particular, the manufacturing system is designed as a manufacturing system for additive manufacturing of a component. For example, the production system is designed as a system for selective laser melting or for selective electron beam melting. The production plant is designed for the production of the component in the plant room. The production system is designed to produce and / or build up the component in layers in the system space based on a melting of a powder bed and subsequent solidification. For example, for this purpose the production plant comprises a coating unit for dispensing and / or applying a top powder layer to the powder bed. The production plant preferably has a radiation source, the radiation source being designed to emit an energy-rich beam, the uppermost powder layer being heated and melted punctually and / or selectively by means of the high-energy beam. The plant room can in particular be flooded and / or flushed with an inert gas. The production of the component by the production system takes place in particular generatively, additively and / or in layers.

The monitoring device has a dynamic vision sensor. The dynamic vision sensor is also referred to in particular as an event camera, neuromorphic camera and / or silicon retina. The dynamic vision sensor has a plurality of pixels and is specifically designed to detect and / or output a change in brightness in the respective pixel for the individual pixels independently and / or asynchronously from the other pixels, with pixels for which no change in brightness can be determined remains silent and / or does not emit a signal. A consideration of the dynamic vision sensor is to provide an output signal and / or reaction based on a change in brightness independently for pixels, so that in particular only changes are detected and output, with static scenes or pixels remaining mute without an output. In particular, the dynamic vision sensor is designed to detect a change in brightness as such from a predetermined and / or adjustable threshold value. The dynamic vision sensor is preferably designed to determine and / or specify additional information for outputting a pixel, for example a pixel address, a time stamp, a polarity and / or an increase / decrease behavior of the change in brightness. The dynamic vision sensor preferably has a time resolution better than a microsecond and / or a dynamic range better than 120 dB.

The dynamic vision sensor can in particular be arranged and / or mounted in the plant room of the production plant. The dynamic vision sensor has a detection area. The dynamic vision sensor is designed to detect changes in brightness for sections that can be detected and / or mapped by the detection area. The dynamic vision sensor is specifically arranged and / or can be arranged for monitoring in such a way that a section or the entire powder bed, in particular the uppermost powder layer, is monitored by sensor technology. In other words, the dynamic vision sensor is arranged and / or arranged for operation in such a way that the powder bed or at least a section of the powder bed lies in the detection range of the dynamic vision sensor. In particular, the dynamic vision sensor is arranged to detect an impact area of the high-energy beam on the powder bed. For example, the monitoring direction has an alignment module, the alignment module being designed to align and / or track the dynamic vision sensor in such a way that the powder bed, a section of the powder bed and / or the area of impact are in the detection area.

The dynamic vision sensor is designed to provide the local change in brightness as event data. In particular, the event data include signals and / or information from pixels for which a change in brightness is detected, the event data preferably not including any data or information from pixels that have not detected a change in brightness. In comparison to conventional optical images and / or recordings, the event data thus specifically only includes information, signals and / or data from pixels that have detected changes, in particular changes in brightness, and no information, signals and / or data from pixels for which the scene remains static, so that the event data is reduced in data compared to the usual image data of an optical recording.

The monitoring device has an evaluation module. The evaluation module can be designed in terms of software or hardware. In particular, the evaluation module can be integrated or part of the dynamic vision sensor. The event data is made available to the evaluation module.

The evaluation module is designed to carry out monitoring based on the event data. For example, the evaluation module is designed to monitor the production plant, in particular the function, operating status and / or process steps of the production plant, based on the event data. Alternatively and / or in addition, the evaluation module is designed to monitor the melting, the impact area, the weld pool, for example its geometry, and / or the solidification. Furthermore, the evaluation module can be designed to monitor the powder bed, for example its intactness and / or smoothness, and / or the application of the powder bed. In particular, the evaluation module is designed to monitor the plant room, method and / or process steps in the manufacture of the component within the plant room. In particular, the deviation from a norm or an average is examined as monitoring. For example, the evaluation module has data on averages such as the smoothness of the powder bed, shape of the melt pool and / or usual smoke development, the monitoring module being designed to determine deviations from these averages. In particular, the evaluation module can be designed to report deviations, in particular those that exceed a tolerance value, for example as an alarm, or to determine regulation and / or control values that counteract and / or correct the deviations.

The invention is based on the idea of providing a monitoring device which enables process monitoring of a production plant, which monitors the plant room with reduced data and thus in particular has a low data rate and reduces requirements for memory and monitoring bandwidth. Furthermore, the monitoring device enables a high temporal resolution. In particular, the monitoring device is characterized by low costs and small installation space, especially in comparison to conventional high-speed cameras with temporal resolution in the microsecond range. The invention thus contributes to reducing the susceptibility of additive manufacturing systems and manufacturing processes to failure. For example, unevenness or grooves in the powder bed, deviations in the weld pool, beam deviations, smoke, splashes and / or the development of smoke can lead to defects in the component, which are detected by the described invention. Overall, this contributes to a reduction in component defects.

One embodiment of the invention provides that the dynamic vision sensor has a pixellated sensor element. The pixelated sensor element has a plurality of pixels. The pixels can, for example, be arranged in the manner of a matrix. The pixels are each designed to detect a change in brightness, in particular a change in brightness that is predetermined and / or the adjustable threshold. In particular, the pixels are designed to output a detected change in brightness as a signal and, if there is no change in brightness or a change in brightness less than the threshold value, no signal is output. For example, the event data include the output signals of the pixels, for example as a signal of the pixel and the pixel address. It is a consideration of the embodiment to carry out process monitoring by means of the dynamic vision sensor, so that events in the form of changes and / or deviations in the detection area are detected and output, but a large part of the detection area cannot be transmitted as data when this area is in this area remains static.

It is optionally provided that the dynamic vision sensor is designed to detect changes in brightness that are based on splashes, smoke, smoke and / or a change in the melt pool. Splashes are understood to mean, in particular, splashes in the area of the melt pool. In particular, smoke in the area of the melt pool or in another section or the entire plant room can be detected and / or monitored as smoke. As a change in the melt pool, the monitoring device monitors and / or detects, for example, a change and / or deviation in shape, contour, surface and / or color.

It is particularly preferred that the evaluation module is designed to carry out an evaluation of the event and / or the deviation based on the event data. In particular, the evaluation module can be designed to carry out an evaluation of the event based on adjacent and / or surrounding pixels and / or a pixel group. In particular, the evaluation module is designed to determine a speed based on the event data for a splash, for smoke and / or smoke. In particular, an absolute speed, a speed direction or a vectorial speed can be determined as the speed. This refinement is based on the consideration of carrying out a monitoring of the production plant which requires reduced data and / or a low bandwidth for data transmission and can nevertheless use more global relationships for monitoring.

The monitoring device optionally has a lighting unit for illuminating the at least one section of the powder bed. In particular, the lighting unit is arranged coaxially to the beam source; alternatively, the lighting unit is arranged off-axis at points or over a large area. The lighting unit is, for example, a lighting diode, OLED or a lighting laser. The lighting unit is in particular for better representation and / or detection of dark, cold and / or non-glowing particles.

In particular, the event data are free of static image data and / or static image information. The event data thus preferably only include dynamic image data and / or information data of changes, in particular changes in brightness. The changes are determined in particular with respect to a time interval, the time interval preferably being less than 5 μs and, in particular, being less than 1 μs. The refinement is based on the consideration of reducing the data rate and / or the amount of data for recording and / or monitoring the production system in that the event data only includes information about changes and no static information has to be transmitted as ballast.

In particular, it is provided that the production system has controllable and / or adjustable production parameters. The production system can be parameterized, set and / or regulated, for example, by means of the production parameters. For example, production parameters are beam intensity, deflection parameters for the high-energy beam, ventilation parameters and / or layer application parameters such as layer density or homogeneity. The evaluation module is designed, in particular, to determine control signals for the production plant based on the event data and / or based on the monitoring. The evaluation module determines the control signals in particular in such a way that they can be used as production parameters or can be used to readjust the production parameters. Problems and / or deviations in the production of the component by the production plant can be eliminated by means of the control signals.

A further object of the invention is a production system for producing a component. In particular, the production system is designed as described for the monitoring device. The manufacturing plant has a plant room. The production system is designed to produce a component based on a powder bed. In particular, the powder bed comprises several layers. The layers are also referred to as powder layers. The production system is designed to produce and / or generate the component layer by layer in the system room by melting powder material of the top layer by means of an energy-rich beam and subsequent solidification of powder melt. The production system forms, for example, a system for selective laser melting or for selective electron beam melting. The manufacturing plant includes a monitoring device. the Monitoring device is designed in particular as described above. The monitoring device comprises a dynamic vision sensor. The dynamic vision sensor is arranged in particular in the plant room or is arranged in such a way that it can detect and / or monitor the plant room using sensors. The dynamic vision sensor is designed to cover at least one section of the powder bed with its detection area and to provide local changes in brightness as event data to an evaluation module. The evaluation module is in particular part of the production plant and / or in particular part of the monitoring device. The evaluation module is designed, based on the event data, to monitor the layer-by-layer structure of the component, the application of the layers, the creation of the component, the melting of the layer, the solidification of the powder melt and / or the powder bed.

It is particularly preferred that the evaluation module is designed to regulate and / or control production parameters of the production system based on the monitoring and / or the event data. For example, the evaluation module is designed to regulate the production system based on the production parameters in such a way that certain deviations and / or errors are corrected by the evaluation module. For example, equipment such as electricity, laser intensity or positioning can be regulated for this purpose.

One embodiment of the invention provides that the production system has a beam source. The beam source can form, for example, a laser source or an electron beam source. The beam source is designed to irradiate the top layer of the powder bed locally, in particular at points and / or in a guided manner. The irradiation serves in particular to heat and melt the layer to melt the powder. In particular, a deflecting mirror can be understood as a beam source, which deflects an energy-rich beam generated by an original source onto the area of incidence. In particular, it is provided that the dynamic vision sensor and the beam source are at the same distance from the powder bed, in particular the top layer, whereby the same distance is understood to mean, for example, that the dynamic vision sensor and the beam source are in a common plane lie parallel to the powder bed. In particular, the dynamic vision sensor and the beam source are arranged coaxially. This refinement is based on the consideration of providing a data-reduced and improved monitoring of the impact area and / or the melting process.

Optionally, a main detection direction of the dynamic vision sensor and a powder bed normal enclose an angle between 90 and 120 degrees. In particular, the normal to the powder bed and the main direction of detection are perpendicular to each other. The main detection direction is in particular the normal to the sensor element. The main detection direction indicates, for example, the direction that is directed towards the area that can be detected by the dynamic vision sensor. The powder bed normal is designed, for example, as a perpendicular to the topmost layer of the powder bed, in the case of non-planar layers, for example, an effective or averaged perpendicular. In other words, the dynamic vision sensor is arranged for lateral monitoring and / or tangential monitoring of the powder bed. This refinement is based on the idea of enabling improved monitoring of smoke, smoke and splashes, in particular improved compared to smoke, smoke and spray monitoring from a bird's eye view.

The dynamic vision sensor is preferably arranged in an extension and / or at the level of the powder bed. Alternatively, the dynamic vision sensor is arranged between the beam source and the powder bed. In particular, the monitoring device and / or the production system can have a plurality of dynamic vision sensors, wherein the dynamic vision sensors can be arranged oriented differently to the powder bed, for example a dynamic vision sensor coaxial, a dynamic vision sensor off -axis and / or a dynamic vision sensor on the side.

Another subject matter of the invention is a method for monitoring a production plant and / or a plant room of a production plant. In particular, the monitoring according to the method takes place by means of the monitoring device as described above. The plant room, in particular as described above, is monitored for changes in brightness by means of a dynamic vision sensor. For example, movements, splashes, deformations and / or smoke are monitored as changes in brightness. The change in brightness is determined on a pixel-by-pixel basis by means of the dynamic vision sensor, and is determined independently for individual pixels. Event data is generated, provided and / or formed, the event data including the changes in brightness. In particular, the event data do not include any data and / or information about static areas, sections and / or pixels for which no change in brightness was detected. Based on the event data and / or the detection of the dynamic vision sensor, the plant room, the production plant and / or the production of the component is monitored by means of the production plant.

• 1 ein erstes Ausführungsbeispiel einer Fertigungsanlage;
• 2 ein zweites Ausführungsbeispiel einer Fertigungsanlage;
• 3 ein drittes Ausführungsbeispiel einer Fertigungsanlage;
• 4a, b schematische Aufnahmen eines Schmelzbads.

Further advantages, effects and configurations emerge from the attached figures and the description. Show:

• 1 a first embodiment of a manufacturing plant;
• 2 a second embodiment of a manufacturing plant;
• 3 a third embodiment of a manufacturing plant;
• 4a, b schematic images of a weld pool.

1 shows schematically a first exemplary embodiment of a manufacturing plant 1 . The manufacturing facility 1 is as a system for the additive manufacturing of a component 2 formed, with the additive manufacturing as a layer-by-layer building up from layers 3 a powder bed 4th is trained. The layers 3 and especially the powder bed 4th are in the plant room 5 arranged with the layers 3 on a construction platform 6th are applied. The construction platform 6th is by means of a height adjustment device 7th Movable up and down so that the top powder layer is flush with a construction level 8th concludes. The construction level 8th has in particular a surface normal, this surface normal also being the surface normal to the powder layer 3 and the powder bed 4th forms.

Building the layers 3 from a material powder takes place in particular with an application unit 9 . The order unit 9 , also called a coating unit, has, for example, a doctor blade which is designed to be powder from a powder reserve 10 by procedure 11 in the plane 8th to distribute smoothly. Surplus powder is taken from the squeegee to a recycling reservoir for reuse 12th promoted.

The manufacturing facility 1 has a beam source 13th on. In this embodiment, the beam source 13th understood a deflecting mirror. There is an original source in the beam path in front of this mirror 14th which send an energetic beam to the radiation source 13th sends, being from the radiation source 13th the energetic beam is deflected and sent to the powder bed 4th , whereby the top layer is locally heated and melted. The heating and melting of the powder by means of the high-energy jet 15th leads to the creation of a weld pool. The component is made by cooling the melt pool and solidifying it 2 built up in layers. The manufacturing facility 1 has a control device 16 on, which is designed to manufacture the component 2 to control and regulate, especially the source of origin 14th , the beam source 13th as well as the facilities 11 and 7th . To this end, the control device 16 for example regulate and set production parameters.

The manufacturing facility 1 has a monitoring device 17th on. The monitoring device 17th has a dynamic vision sensor 18th and an evaluation module 19th on. The dynamic vision sensor 18th has a detection area 20th on, with objects, scenes and events, especially movements, in the detection area 20th from the dynamic vision sensor 18th are detectable and detectable. The dynamic vision sensor 18th is further spaced in height from the powder bed 4th as the beam source 13th . There is also the dynamic vision sensor 18th arranged so that in the detection area 20th the top layer of the powder bed 4th completely lies. Furthermore, are in the detection area 20th the powder bed reservoir 10 and the recycling reservoir 12th . In particular, the dynamic vision sensor 18th have a focal plane, the focal plane in this exemplary embodiment with the plane 8th coincides. In a variant of this exemplary embodiment, a beam splitter is arranged in the beam path of the beam source, the detection area being the dynamic vision sensor 18th via this beam splitter and the deflecting mirror onto the powder bed 4th and / or the powder bed reservoir 10 and / or the recycling reservoir 12th is directed.

The dynamic vision sensor 18th is designed to allow changes in brightness in the detection area 20th to capture and detect, the detection by means of pixels of a sensor element of the dynamic vision sensor 18th he follows. The dynamic vision sensor 18th is designed to independently detect the change in brightness in the pixels, with only changes in brightness leading to signals and / or outputs, and pixels for which no change in brightness was detected are silent and do not provide any outputs or signals. That’s the dynamic vision sensor 18th trained only for changes in the detection area 20th react and record them and not detect static in the detection area and / or lead to a signal output. The dynamic vision sensor 18th is designed to provide detected changes in brightness as event data.

The evaluation module 19th are the event data of the dynamic vision sensor 18th provided. The event data is transmitted via the data connection 21 . The use of a dynamic vision sensor 18th for monitoring the plant room 5 has the advantage that the data to be transferred is on the data connection 21 compared to conventional optical detectors such as cameras, are far lower and the data to be stored are also lower. The evaluation module 19th is designed to manufacture the component based on the event data 2 to monitor. In particular, is the evaluation module 19th formed, based on the event data, the quality, for example the intactness and / or smoothness, of the top layer of the powder bed 4th ascertain. This is due, for example, to the fact that for consecutive intact topmost Layers no deviations and thus no changes in brightness and / or color can be determined, but defective coatings compared to previous correct coatings lead to changes in brightness. The evaluation module is also 19th designed to monitor and / or determine the geometry of the weld pool based on the event data, as well as the development of smoke and / or splashes in the plant room 5 .

Furthermore, the evaluation module is designed to determine measures and control signals based on this monitoring, by means of which the control device 16 detected errors and / or deviations in the manufacture of the component 2 can fix. The evaluation module is for this purpose 19th and the control device 16 connected in terms of data technology.

2 showed a second embodiment of the manufacturing plant 1 . This differs in comparison to the production system 1 the end 1 essentially through the arrangement of the dynamic vision sensor 18th . In this exemplary embodiment is the dynamic vision sensor 18th Equally spaced in terms of height from the top layer three or the level 8th as the beam source 13th . This arrangement makes the detection area 5 stronger on the powder bed 4th focused and / or limited. In particular, the dynamic vision sensor is arranged 18th and beam source 13th coaxial. The arrangement according to this exemplary embodiment enables improved monitoring of the melt pool, the melting process and the solidification process.

For improved monitoring of smoke development, for example, the embodiment from 3 be used. In contrast to the exemplary embodiment 1 , 2 is the dynamic vision sensor 18th different to the powder bed 4th arranged. Furthermore, the monitoring device 17th a lighting unit 22nd on. The lighting unit 22nd has a radiation area 23 on. The powder bed 4th and in particular the top layer lie within the ab beam area 23 and are illuminated by the lighting unit.

At the level of the powder bed 4th is the dynamic vision sensor 18th arranged with its detection area 20th or its main direction of detection 24 perpendicular to the surface normal 25th of the powder bed 4th . The resulting lateral monitoring, especially together with the lighting, enables data-reduced and improved detection of smoke and syringes during the manufacturing process.

4a shows schematically a recording of a common optical camera in the plant room 5 of the manufacturing plant 1 and the powder bed 4th . The camera records and displays all objects, especially edges, color gradients and shapes. This is the entire weld pool 26th optically mapped and recorded as data. The melt pool 26th has a central area 27 on which the high-energy beam is currently the powder bed 4th warmed up. The high-energy beam and thus the center 27 are here, for example, to the left in the direction of travel 28 moved on. Thus areas are to the right of the center 27 , i.e. areas in the opposite direction 28 from the center 27 , Cooling areas 29 . Around the center 27 is located in particular concentrically, a transition area 30th that has a higher temperature and therefore a different color or brightness than the area 29 but due to a lower temperature than in the center 27 . The recording by the optical camera according to FIG. 4a shows all these areas, as well as the powder bed 4th in its generality, and depicts it.

4b shows by way of example and schematically the same scene as from 4a however recorded with a dynamic vision sensor 18th . The dynamic vision sensor 18th only detects changes, in particular in the form of changes in brightness. Static areas of the scene, for example the unchanged powder bed 4th , the plant room 5 or solidified melt in the area 29 are made by the dynamic vision sensor 18th not illustrated. Only changes in the scene compared to a previous moment are detected by the dynamic vision sensor 18th detected and output. By moving the beam towards 28 areas to the left of the center are heated and areas to the right of the center are cooled. This leads to different emissions and / or brightnesses. These changes are made by the dynamic vision sensor 18th detected, with warmer areas 31 In particular, they are displayed or / output differently or in different colors than areas that cool down 32. Such a distinction can be made, for example, in such a way that heating causes a positive change in brightness, i.e. more light is emitted, whereas cooling leads to less light emission and a negative change in brightness causes. Such changes in brightness are made by the dynamic vision sensor 18th output as event data.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102016225616 A1 [0002]

Claims (15)

Monitoring device (17) for a powder bed-based production system (1), wherein the production plant (1) has a plant room (5) and is designed to produce a component (2) generatively and / or in layers in the plant room (5) by melting and solidifying a powder bed (4), with a dynamic vision sensor (18) and an evaluation module (19), wherein the dynamic vision sensor (18) has a detection area (20) and is arranged to detect at least one section of the powder bed (4) with the detection area (20) by sensors and is designed to detect and provide a local change in brightness as event data , the event data are provided to the evaluation module (19) and the evaluation module (19) is designed based on the event data, the production plant (1), the plant room (5), the melting, the solidification, the powder bed (4), the manufacture and / or to monitor a manufacturing process step. Monitoring device (17) after Claim 1 , characterized in that the dynamic vision sensor (18) for the technical detection of the detection area (20) has a pixellated sensor element with pixels, wherein a local change in brightness corresponds to a change in brightness in a pixel. Monitoring device (17) after Claim 1 or 2 , characterized in that the dynamic vision sensor (18) is designed to detect splashes, smoke development, smoke and / or a change in the melt pool as changes in brightness. Monitoring device (17) according to one of the preceding claims, characterized by a spectral filter, the spectral filter being designed and / or arranged to pre-filter spectrally in front of the dynamic vision sensor (18), the event data describing changes in brightness in the spectrally filtered range. Monitoring device (17) according to one of the preceding claims, characterized in that the evaluation module (19) is designed to determine a speed, in particular amount and direction, of a splash, smoke and / or smoke based on the event data. Monitoring device (17) according to one of the preceding claims, characterized in that the event data are free of static image information. Monitoring device (17) according to one of the preceding claims, characterized by at least two dynamic vision sensors (18), each of the dynamic vision sensors (18) being designed to output event data, the evaluation module (19) being designed to determine a position and / or trajectory in all spatial directions for an event, splashes, smoke and / or smoke. Monitoring device (17) according to one of the preceding claims, characterized by a lighting unit for illuminating the at least one section of the powder bed (4). Monitoring device (17) according to one of the preceding claims, characterized in that the production system (1) has controllable and / or adjustable production parameters, the evaluation module (19) being designed based on the event data and / or the monitoring control signals for regulating the production parameters to determine. Production plant (1) for the production of a component (2), with a plant room (5), the component (2) being built up in layers and melting powder material of the top layer of a powder bed (4) with an energy-rich beam and solidification of powder melt in the Plant room (5) can be generated with a monitoring device (17), in particular according to one of the preceding claims, wherein the monitoring device (17) has a dynamic vision sensor (18) and an evaluation module (19), wherein the dynamic vision Sensor (18) is arranged with its detection area (20) to detect at least one section of the powder bed (4) using sensors and to provide local changes in brightness as event data, the evaluation module (19) being designed based on the event data, the layered structure, the generation of the component (2), the melting, the solidification and / or the powder bed (4) to be monitored. Production line (1) according to Claim 7 , characterized in that the evaluation module (19) is designed to regulate the production system (1), at least one production parameter, the high-energy beam and / or the layered structure based on the event data. Manufacturing plant (1) according to one of the Claims 7 or 8th , characterized by a beam source (13) for locally irradiating a layer of the powder bed (4) with the high-energy beam, the beam source (13) and the dynamic vision sensor (18) being equidistant from the powder bed (4) and / or coaxially are arranged. Manufacturing plant (1) according to one of the Claims 7 or 8th , characterized in that the dynamic vision sensor (18) has a main detection direction (24) and a powder bed normal can be assigned to the powder bed (4), the main detection direction (24) enclosing an angle between 60 and 120 degrees with the powder bed normal. Manufacturing plant (1) according to one of the preceding claims, characterized in that the dynamic vision sensor (18) is arranged in an extension and / or at the level of the powder bed (4). A method for monitoring a production plant (1), a section of the powder bed (4) being monitored by means of a dynamic vision sensor (18) using sensors to provide event data, the production plant (1), a plant room (5 ), a melting, a solidification, the powder bed (4), a production and / or a process step of the production of a workpiece is monitored.

Images