AT519937B1 - Unmanned aerial vehicle and system for generating fireworks in the airspace - Google Patents

Abstract

Unmanned aerial vehicle (1), comprising a drive unit (2) to enable the aircraft (1) to fly in the airspace and a data processing unit (3) which is used to control a position or a chronological sequence of positions of the aircraft (1) in the airspace is formed in real time based on position information. The aircraft (1) has at least one holding means (6) for holding at least one firework and one activating means (11) for activating the at least one firework, the data processing unit (3) for evaluating and possibly determining at least one security parameter and for controlling the activating means (11) is designed as a function of the at least one security parameter.

Description

UNMANNED AIRCRAFT AND SYSTEM FOR CREATING A FIREWORK IN THE AIR SPACE The invention relates to an unmanned aerial vehicle, comprising a drive unit for enabling the aircraft to fly in the airspace and a data processing unit for controlling a position or a chronological sequence of positions of the aircraft in the airspace is formed essentially in real time on the basis of position information.

When presenting art or information in the entertainment industry, at public and private events, or in general, it is often desirable to provide an image in airspace. This can be done, for example, by using fireworks. Such fireworks are fired from the ground manually or controlled by a computer in a certain order.

The development of recent years in the technical field of unmanned aerial vehicles, commonly referred to in English as "Unmanned Aerial Vehicle (UAV)", especially in the field of "drones" or "multicopters", have led to the fact that such aircraft images are used in the airspace. For example, a large number of UVAs were equipped with light-emitting diodes or other illuminants in order to let the UVAs fly in the swarm with these illuminants, certain images being generated in the airspace by switching the individual illuminants of the UVAs on and off.

It would be desirable to be able to populate a UAV with a firework to provide an image in airspace using that firework. However, this is currently not possible with state-of-the-art UVAs due to a certain risk potential, since the direction of flight and the explosion of the firework can only be controlled to a limited extent. For example, a gust of wind could turn the UVA in an undesired direction and the fireworks could be shot into the audience.

The invention has for its object to provide an unmanned aircraft, which improves the security of an image in the air space, which is done, among other things, by the use of fireworks, and minimizes the potential hazard for viewers, possible passers-by, other unmanned aerial vehicles, etc. ,

According to the invention, this object is achieved in that the aircraft has at least one holding means for holding at least one firework and one activating means for activating the at least one firework, the data processing unit for evaluating and optionally determining at least one safety parameter and for controlling the activating means of the at least one security parameter.

By activating the fireworks as a function of at least one security parameter, it is prevented, for example, that the fireworks are activated in the vicinity of people or other UAVs. In this case, the at least one security parameter expediently has position information and / or time information.

In the example of position information, this can mean that a firework is only activated when the UAV is in a defined range of, for example, spatial or location coordinates. Conversely, this can mean that a firework is not activated in a defined range of, for example, spatial or location coordinates. Such criteria can be combined. Consequently, the invention particularly advantageously prevents a firework from hitting a person, a different living being or an object or from exploding in the vicinity thereof. In which

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For example, from time information, this can mean that a firework is only activated when a defined point in time occurs. Conversely, this can mean that a firework is not activated before a point in time.

If the at least one security parameter additionally has a time criterion, with the security parameter and / or the time criterion being / being designed as a value range with at least one limit value, the security can be further increased in this way. For example, the time criterion can be defined as a minimum period during which a firework is not activated in order to rule out short-term changes or influences.

If the aircraft additionally has a communication unit and the data processing unit is designed to receive and evaluate the position information and the at least one security parameter essentially in real time, then the aircraft can advantageously be operated by an external control device, for example a ground control unit, essentially in real time Airspace can be controlled, whereby the image, i.e. the fireworks, can be controlled and activated in real time in the airspace.

In an advantageous embodiment of an aircraft according to the invention, the at least one holding means is designed to be rotatable on the aircraft by means of an alignment means, at least uniaxially, preferably biaxially, the data processing unit being designed to control the alignment of the holding means by means of the alignment means on the basis of alignment information. For example, the direction of the holding means and consequently the firing direction of the firework (s) can advantageously be changed while the aircraft is being held, for example, at a position in the air space or being moved from a position in the air space to a next position in the air space. It would also be possible to control the flight of the aircraft in such a way that the aircraft is rotated around its own axis until the firecracker points in a direction in the air space in which the firework can be safely launched.

[0012] In a particularly advantageous embodiment, the data processing unit is designed to control the activation means as a function of at least two security parameters, one security parameter having alignment information. This can consequently mean that a firework is only activated if the UAV or the holding means has a fixed orientation of, for example, solid angles. Conversely, this can mean that a firework is not activated in a defined range of, for example, solid angles. As a result, security is further increased and the invention advantageously prevents, among other things, a firework being fired in the direction of a human being, a different living being, an object or a residential area.

All possible applications of one or more security parameters, serially or in parallel security parameters are conceivable and can be useful. For example, a first security parameter can have position information, which means, for example, that a firework is only activated in a defined area. If the criterion of the first security parameter is met, a second security parameter, which has time information, can subsequently start to run, that is to say in series with the first security parameter. In this case, for example, a firework would be ignited after the UAV has passed a safety limit and a subsequent safety period has expired. However, a second security parameter can also exist in parallel with a first security parameter, that is, both criteria must be fulfilled at the same time. This would mean, for example, that a firework is only ignited if the UAV is in a defined area for a certain period of time.

[0014] All security parameters, for example the position information, the time information and / or the alignment information, can be combined as desired. Each security parameter can have other useful criteria, such as a “night rest 2/13

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Criterion ”, which would mean that a firework should only be activated until the legally permitted night's rest, or, for example, a“ protected area criterion ”, which would require that a firework should not be in, over or towards a nature reserve or residential area / s is activated.

[0015] The aircraft is advantageously designed as a drone, for example as a multicopter. As a result, the aircraft can be purchased and adapted cheaply, and the flight stability and controllability via position information, which can be, for example, three-dimensional GPS coordinates, are precise, and the aircraft can be held at a position in the airspace for an essentially infinite time.

Advantageously, at least one unmanned aerial vehicle according to the invention, or particularly advantageously, a plurality of unmanned aerial vehicles according to the invention form a system for generating the image in the air space, the image in the air space from position information and at least one fireworks activated by the at least one aircraft in during an imaging phase Dependence on at least one security parameter is generated. Advantageously, each aircraft additionally has at least one sensor unit for transmitting distance information to the data processing unit essentially in real time, with each data processing unit being configured in a swarm group on the basis of the position information and / or the distance information for controlling the aircraft. As a result, the aircraft are able to fully autonomously display the image in the airspace without further external control or intervention, while advantageously reducing the amount of information that must be communicated between the aircraft. A safety parameter can have the distance information, which prevents another aircraft from being damaged when a firework is activated and thus additionally increases the safety of the system.

In an advantageous embodiment, at least one aircraft has an imaging means, in particular a LASER means, an LED means or a display means, instead of the holding means, the activating means being designed to activate the imaging means and the data processing unit being designed to control the activating means. Various effects, such as fireworks and LASER, can be combined to increase the variety of images in airspace.

A system according to the invention for generating an image in the air space can additionally have a ground control unit which is designed to store, process, transmit and / or receive position information of the image and / or the security parameters, the ground control unit using a ground communication unit Communication with the communication units of the aircraft is essentially in real time. As a result, particularly complex and particularly large images can be created in the airspace by means of a large number of aircraft, for example 100 or more, without the aircraft colliding with one another, parts of the aircraft or all aircraft being controlled externally by the ground control unit.

In the following, the aircraft according to the invention, the system according to the invention and the method according to the invention are explained in more detail in a non-limiting manner on the basis of exemplary embodiments shown in the drawings.

FIG. 1 shows a perspective schematic view of an unmanned aerial vehicle according to a first embodiment of the invention. FIG. 2 shows a view from above of a plurality of unmanned aerial vehicles according to FIG. 1. FIG. 3 shows a perspective schematic view of a system for generating an image in airspace. [0023] Figure 1 shows an unmanned aircraft 1 according to a first embodiment of the

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Invention. The aircraft 1 is designed as a drone, more precisely referred to as a so-called "octocopter". A drive unit 2 of the aircraft 1 consists of eight rotor units which are driven, for example, by means of eight electric motors. The drive unit 2 enables the aircraft 1 to fly in the airspace.

An "Okotocopter" is a variant of a "multicopter" with eight rotor units. The aircraft 1 can alternatively be designed as another variant of a multicopter, for example as a “quadcopter” with four rotor units, etc., in principle any number of rotor units is possible. However, the unmanned aerial vehicle 1 can also be any one (such as a zeppelin, balloon, etc.) that can be stabilized in its position in the airspace.

The term “air space” refers to every possible space above an artificial or natural floor inside or outside an artificial or natural space or building.

The aircraft 1 also has a data processing unit 3, which is designed to control a position or a chronological sequence of positions of the aircraft 1 in the air space essentially in real time on the basis of position information. The position information is, for example, "Global Positioning System (GPS)" - based, three-dimensional coordinates in airspace, for example data in GPS Exchange Format (GPX). The data in GPX format can contain geodesics, i.e. the geographic coordinates latitude, longitude and elevation. Alternatively, the data can also be based on the Galileo, GLONASS, Beidou / Compass or any other satellite navigation and / or timing system or on a local or building-based navigation system for determining the position of the aircraft inside and outside of buildings (such as determining the position by transmitting transmission signals , Optical positioning systems etc.).

The expression “a chronological sequence of positions” essentially corresponds to a predetermined route or a predetermined “track”, which can also be data in GPX format. The extent of the chronological sequence determines the flight speed of the aircraft 1. It is particularly advantageous to change the “chronological sequence of positions” even during the running time of the system, for example through the interaction of a user, or to derive new positions of one or more aircraft 1 from the interaction of the user , The way in which the user's interaction is transmitted to the system is immaterial. It is particularly advantageous to use a communication unit to transmit the changed positions or changed chronological sequences of positions to the aircraft 1.

With the data processing unit 3, it is thus possible to control the aircraft 1 at a specific airspeed to a specific position in the airspace or along a specific route in the airspace. For this purpose, the rotors of the drive unit 2 are controlled accordingly by the data processing unit 3. In addition, the aircraft 1 has, for example, a GPS receiver, in order to compare the current position of the aircraft 1 with the predetermined position or route at any time using the position information.

The “control of a chronological sequence of positions of the aircraft 1 in the air space” thus means, among other things, the control of a movement or trajectory of the aircraft 1 in the air space, that is to say essentially the control of the flight of the aircraft 1 in the air space.

The position information can be stored in a storage unit 4. The data processing unit 3 receives the position information from the storage unit 4 and controls the aircraft 1 in accordance with this position information. In addition, the data processing unit 3 can transmit the current position information to the storage unit 4, where it is stored, for example for control purposes or as a backup.

In addition, the aircraft 1 according to the first embodiment has a communication

AT 519 937 B1 2020-02-15 Austrian patent office on unit 5. The data processing unit 3 can thus also receive the position information from an external control device, for example from a laptop, a smartphone or a floor control unit, or send the current position information to this external control device. In this case, the position information is received or transmitted essentially in real time, which ensures smooth communication, and which means that the position in the airspace to be controlled by the aircraft 1 can be updated at any time, if necessary. The communication unit 5 of the aircraft 1 can also be designed to communicate with the communication unit 5 of another aircraft 1. This will be discussed in more detail later.

The aircraft 1 according to the first embodiment of the invention further has a holding means 6 for holding at least one firework and an activating means 11 for activating the at least one firework. The data processing unit 3 is designed to control the activation means 11. If the activating means 11 is activated by the data processing unit 3, it activates the firework, for example by an ignition process, and the firework, if it is, for example, a firework rocket or a firework ball to be fired, is fired in a firing direction 7 of the holding means 6. The functional principle can essentially correspond to that of a firearm, an air pressure weapon, or a spring pressure weapon, wherein the holding means 6 would represent a barrel of the respective weapon and the activation means 11 would represent, for example, a bolt, an air pressure medium, a spring, an ignition mechanism, etc. Alternatively, the holding means 6 and / or the activating means 11 can also be controlled by an external control device, for example by a laptop, a smartphone or a ground control unit.

The holding means 6 is fastened to an alignment means 8, which can be rotated at least uniaxially, for example about an axis of symmetry 9 of the aircraft 1, or of the alignment means 8. The data processing unit 3 is designed to control the alignment of the holding means 6 by means of the alignment means 8 on the basis of alignment information. The holding means 6 can be controlled by the data processing unit 3 or by an external control device via the communication unit 5.

The aligning means 8 is advantageously rotatable in two axes, namely about the axis of symmetry 9 of the aircraft 1 and about a pivot axis of the aligning means 8. The pivot axis is advantageously arranged essentially at right angles to the axis of symmetry 9. While the aircraft 1 is in a stable, essentially static position in the air space, the axis of symmetry 9 is essentially perpendicular and the pivot axis is consequently aligned horizontally. For example, the orientation of the holding means 6 can hereby compensate or reinforce a different orientation of the aircraft 1. Alternatively, the alignment of the holding means 6 can also take place exclusively via the alignment of the aircraft 1 in the air space.

The alignment information can include, for example, angle and time information, that is to say, for example, at what angle about the axis of symmetry 9 the alignment means 8 should be aligned and at what time. The alignment information can be synchronized in time or space with the position information, as a result of which the alignment of the holding means 6 can be adapted to the respective current position of the aircraft 1.

The aircraft 1 according to the invention can thus generate an image in the air space by means of at least one firework, the image based on the temporal change in the position of the aircraft 1 in the air space on the basis of the position information and / or on the basis of the temporal change in the alignment of the alignment means 8 Alignment information can be varied spatially and temporally.

The holding means can have a plurality of holding means 6, for example 2 to 10 or more than 10. This plurality of holding means 6 can be used jointly or independently of one another by means of the aligning means 8 or by means of a plurality of aligning means 8

AT 519 937 B1 2020-02-15 Austrian patent office and are controlled by the data processing unit 3. For example, an entire firework battery, that is to say a plurality of fireworks, which are activated as a function of time, can be fired from an aircraft 1.

The data processing unit 3 is designed to control the activation means 11 and / or the alignment means 8 as a function of at least one security parameter. This means that the data processing unit 3 only releases the activation means 11, that is to say activates it positively, if a criterion of the at least one security parameter is fulfilled. Furthermore, the data processing unit 3 can withdraw the release of the activation means 11, ie control it negatively, if the security parameter additionally has a time criterion and the criterion of the security parameter is suddenly no longer met before the time criterion expires. Furthermore, the data processing unit 3 can align the alignment means 8 with respect to the criterion of a further security parameter, for example a security corridor, defined by spatial coordinates, in the direction of which the firing direction 7 of the holding means 6 is to be aligned. This security parameter can additionally have a time criterion, for example as already described in more detail above.

Figure 2 shows an example in a view from above a plurality of unmanned aerial vehicles 1 according to the first embodiment shown in Figure 1. Two security parameters 12 and 13 are defined, each data processing unit 3 being designed to control the corresponding activation means 11 and / or the corresponding alignment means 8 as a function of these security parameters 12 and 13.

The first exemplary security parameter 12 is defined by spatial coordinates, for example GPS coordinates in latitudes and longitudes, and extends virtually vertically upwards, a maximum flight height of the aircraft 1 delimiting an upper three-dimensional space. The security parameter 12 is therefore a virtual space in the form of a cube or cuboid. Each data processing unit 3 only activates the corresponding activation means 11, or only releases it, if the criterion of the security parameter 12 is fulfilled, this criterion consisting in the corresponding aircraft 1 being within the virtual space. Conversely, the data processing unit 3 does not activate the activation means 11, or does not release it, if the criterion of the safety parameter 12 is not met, that is, if the corresponding aircraft 1 is not within the virtual space.

The second exemplary security parameter 13 is defined by spatial coordinates, for example GPS coordinates in latitudes and longitudes, and by direction coordinates, for example also using GPS coordinates, and extends along a virtual three-dimensional truncated cone. Each data processing unit 3 only activates the corresponding activation means 11, or only releases it, if the criterion of the safety parameter 13 is fulfilled, this criterion consisting in the alignment means 8 of the corresponding aircraft 1 being oriented such that the direction of launch 7 and the resulting trajectory of the firework is inside the virtual three-dimensional truncated cone. Conversely, the data processing unit 3 does not activate the corresponding activation means 11, or does not release it, if the criterion of the safety parameter 13 is not fulfilled, i.e. if the firing direction 7 and / or the resulting trajectory of the firework is not within the virtual three-dimensional truncated cone.

The two security parameters 12 and 13 are parallel and interdependent, which means that they must both be fulfilled at the same time so that a data processing unit 3 activates the corresponding activation means 11. Alternatively, the safety parameters 12 and 13 of all aircraft 1 could be defined as interdependent, which would mean that both safety parameters 12 and 13 would have to be fulfilled for all aircraft 1 at the same time so that a data processing unit 3 activates the corresponding activation means 11.

[0043] Alternatively, as already described above, the security parameters 12 and 13

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AT 519 937 B1 2020-02-15 Austrian patent office additionally have a time criterion or other security parameters, for example consisting of time information, can be defined. The different security parameters can be dependent on one another or defined independently and / or in series or in parallel.

If several unmanned aerial vehicles 1 according to the invention are combined in a system, for example in the form of a swarm group, these can be controlled in formation in order to create images in the airspace during an imaging phase.

Figure 3 shows such a system 10 according to the invention of three unmanned aerial vehicles 1 according to the first embodiment shown in Figure 1. The position information and the alignment information are designed as image information relating to the image.

The system 10 has a ground control unit 15 which is designed for storing, processing, transmitting and / or receiving the position information and / or mapping information. This information is transmitted from the ground control unit 15, for example from a ground communication unit 16, to the corresponding data processing units 3 essentially in real time via the communication units 5 of the aircraft 1. As a result, particularly complex and particularly large images can be created in the airspace by means of a large number of aircraft 1, for example 100 and more, without the aircraft 1 colliding with one another, with some or all of the aircraft 1 being controlled by the ground control unit 15 , Alternatively, these aircraft 1 can also act automatically, without prior control by a floor unit, by previously storing the positions and their time sequences.

The aircraft 1 of the system 10 additionally have a three-dimensional sensor unit 14, which continuously detects the distance to neighboring aircraft 1 essentially in real time and transmits this distance information to the corresponding data processing unit 3 and / or the ground control unit 15. The data processing unit 3 and / or the ground control unit 15 can then update the position information about the feedback from the sensor unit 14 essentially in real time. The aircraft 1 can hereby be moved, for example, in a swarm. It may be sufficient to control only one to five aircraft 1 in order to move a large amount, for example 100 or more, of aircraft 1, since all other aircraft 1 follow the controlled aircraft 1 on the basis of swarm intelligence. This can greatly reduce the amount of information that is transmitted.

Figure 3 can alternatively represent a section of a system with significantly more aircraft 1, for example 100 and more aircraft 1. This allows complex and particularly large images can be created by using a large number of aircraft 1 in the airspace with the advantageous use of fireworks.

Alternatively, at least one aircraft 1 may have an imaging means, in particular a LASER means, an LED means or a display means, instead of the holding means 6, the activating means 11 for activating the imaging means and the data processing unit 3 for controlling the activating means 11 and the imaging means on the basis of imaging information and / or for aligning the imaging means by means of the alignment means 8 on the basis of alignment information.

As a result, particularly complex images can be created by using a large number of aircraft 1 in the airspace with the advantageous use of fireworks and imaging means.

With regard to the holding means 6 and the imaging means, all conceivable combinations are possible, in particular using the examples described above.

[0052] A method according to the invention for generating an image in air space during

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The system 10 is, for example, designed such that the entire information is stored in a memory of the ground control unit 15, and for example the mapping information, position information, alignment information, time information, distance information and the safety parameters are continuously retrieved by control software and via the ground communication unit 16 and the communication units 5 are transmitted to the data processing units 3 of the aircraft 1. This means that method steps A) and B) and optional method steps C) and D) are carried out in succession and / or simultaneously with respect to one or each aircraft 1 during the entire imaging phase.

In a method step A), the imaging information is transmitted to the data processing units 3 of the aircraft 1 essentially in real time. In a method step B), the data processing units 3 control the aircraft 1 within the airspace essentially in real time on the basis of the mapping information to the corresponding positions. During or after method step (s) B), at least one firework is activated as a function of at least one safety parameter.

In an optional method step C), the ground communication unit 15 transmits imaging information to the data processing unit 3 of another of the aircraft, which has imaging means. The imaging means can be formed by a display or other comparable means. In a further optional method step D), the data processing unit 3 controls the at least one further aircraft 1 with the imaging means within the airspace on the basis of the position information and activates the at least one imaging means of this aircraft 1 during or after method step (s) D).

Process steps A) and B) and optionally process steps C) and D) can be carried out in real time in any order in succession and / or simultaneously for all aircraft 1 or only for parts of aircraft 1. In this way, three-dimensional and dynamic images can be provided in the airspace.

It can be mentioned that an aircraft or system according to the invention can be used for the controlled and automated safe blasting of snow or stone / scree avalanches.

The term “unmanned aerial vehicle” is to be interpreted very broadly in the context of this invention and could also include, for example, hot air balloons, zeppelins, model aircraft or model helicopters.

The term “fireworks” is to be interpreted very broadly in the context of this invention and could also be, for example, a burning ball or another object with a burning or explosive substance.

Furthermore, the term “firecracker” in the context of this invention is to be interpreted in particular very broadly, since, for security reasons that correspond to the spirit of this invention, a “firecracker” in the sense of this invention can also represent an object that does not contain any burning or explosive substances has, for example a luminous or colored object, in particular based on fluorescent, phosphorescent or otherwise chemically or electrically activated luminous and / or colored materials and / or effects.

[0061] According to a further exemplary embodiment of the invention, an aircraft according to the invention has no alignment means for aligning the firework. The fireworks are aligned by the flight maneuver flown by the aircraft. The horizontal alignment of the fireworks can be done by simply rotating the aircraft around its own axis, which is particularly easy with UVAs, with the vertical alignment of the fireworks by the holding means in advance

AT 519 937 B1 2020-02-15 Austrian patent office. In addition, the vertical alignment of the fireworks for the correct launch position could be due to the currently flown flight maneuver, i.e. the short-term one

One side of the UVA is lowered or raised in flight.

According to a further exemplary embodiment, the recoil of the firework can be taken into account both for the desired trajectory following the launch and for the firework to be fired safely. For example, the recoil of the firework when fired can lead to a twisting or tilting of the firing direction. It is particularly advantageous here if this possible change in the firing direction is also taken into account with regard to safety.

Claims (14)

1. Unmanned aircraft (1), comprising a drive unit (2) to enable the aircraft (1) to fly in the air space and a data processing unit (3) which is used to control a position or a chronological sequence of positions of the aircraft (1) in the air space is formed essentially in real time on the basis of position information, characterized in that the aircraft (1) has at least one holding means (6) for holding at least one firework and one activation means (11) for activating the at least one firework, the data processing unit (3) is designed to evaluate and possibly determine at least one security parameter and to control the activation means (11) as a function of the at least one security parameter. 2. Aircraft (1) according to claim 1, characterized in that at least one security parameter additionally has a time criterion, the security parameter and / or the time criterion being / are designed as a value range with at least one limit value. 3. Aircraft (1) according to claim 1 or 2, characterized in that the at least one security parameter has position information or time information. 4. Aircraft (1) according to one of claims 1 to 3, characterized in that the aircraft (1) has a communication unit (5), the data processing unit (3) by means of the communication unit (5) for receiving and evaluating the position information and the at least one security parameter is formed essentially in real time. 5. Aircraft (1) according to one of claims 1 to 4, characterized in that the at least one holding means (6) by means of an alignment means (8) is at least uniaxially, preferably biaxially, rotatably attached to the aircraft (1), the Data processing unit (3) for controlling the alignment of the holding means (6) by means of the alignment means (8) on the basis of alignment information. 6. Aircraft (1) according to claim 5, characterized in that the data processing unit (3) for controlling the activation means (11) is designed as a function of at least two security parameters, wherein a security parameter has alignment information. 7. Aircraft (1) according to one of claims 1 to 6, characterized in that the aircraft (1) is designed as a drone, in particular as a multicopter. 8. System (10) for generating an image in the air space as a function of at least one security parameter consisting of at least one unmanned aircraft (1), characterized in that an unmanned aircraft (1) is provided according to one of claims 4 to 7 and that during in a mapping phase, the mapping in the airspace is generated from position information and at least one fireworks activated by the at least one aircraft (1) as a function of the at least one security parameter. 9. The system (10) according to claim 8, comprising at least two unmanned aerial vehicles (1), each aircraft (1) additionally having at least one sensor unit (14) for transmitting distance information to the data processing unit (3) substantially in real time, each Data processing unit (3) is configured in a swarm group on the basis of the position information and / or the distance information for controlling the aircraft (1). 10. System (10) according to claim 9, wherein the system (10) has at least two unmanned aerial vehicles (1) according to one of claims 6 or 7, characterized in that a safety parameter has distance information. 10/13 AT 519 937 B1 2020-02-15 Austrian patent office 11. System (10) according to claim 9 or 10, characterized in that at least one aircraft (1) instead of the holding means (6) has an imaging means, in particular a LASER means, an LED means or a display means, wherein the activation means (11) for activating the imaging means and the data processing unit (3) for controlling the activation means (11) and the imaging means. 12. System (10) according to any one of claims 8 to 11, characterized in that the system (10) additionally a ground control unit (15) for storing, processing, transmitting and / or receiving position information of the image and / or the security parameters The ground control unit (15) is designed essentially in real time by means of a ground communication unit (16) for communication with the communication units (5) of the aircraft (1). 13. A method for generating an image with at least one unmanned aerial vehicle (1) in air space during an imaging phase, characterized in that the image is generated by means of a system (10) according to one of claims 8 to 12 by the following method steps: A) transmitting position information to the data processing unit (3) of the aircraft (1); B) controlling the aircraft (1) within the airspace by means of the data processing unit (3) essentially in real time on the basis of the position information, with at least one firework being activated depending on at least one safety parameter before, during or after method step (s) B) becomes. 14. The method according to claim 13, characterized by the following further method steps: C) transmitting imaging information to the data processing unit (3) of another of the aircraft (1); D) Controlling the at least one further aircraft (1) within the airspace by means of the data processing unit (3) essentially in real time on the basis of the position information, at least one imaging means being activated before, during or after method step (s) D).