Assembly and method for displaying construction-related data in an image of a construction site

Abstract

The invention relates to an assembly, a head-worn unit, and a method for displaying construction-related data in an image of a construction site. The assembly is configured for performing the method comprising the steps of : digitizing, storing in a database, and managing construction-related data using Building Information Modelling (BIM); generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data; displaying of the virtual image by means of a display provided for that purpose, and correct relative positioning of the virtual image and the image of the construction site with respect to each other. The head-worn unit is configured to be part of the assembly, and in particular for displaying construction-related data in combination with the virtual image in an image of the construction site by using Extended Reality (XR), in particular Augmented Reality (AR) or mixed Reality (MR).

Description

[0001] Assembly and method for displaying construction-related data in an image of a construction site

[0002] BACKGROUND OF THE INVENTION

[0003] The invention relates to an assembly for displaying construction-related data in an image of a construction site. The invention further relates to a head-worn unit that is configured to be part of the assembly. The invention also relates to a method for displaying construction-related data in an image of a construction site. In the context of the invention, the term 'construction' is used in its broadest sense and, in addition to construction of buildings, interiors or infrastructure objects, also refers to maintenance or renovation thereof.

[0004] Building Information Modelling (BIM) is a known process whereby construction-related data such as drawings, texts, labels, symbols, indications, instructions, physical or functional characteristics, dimensions, images of objects, shapes or models are digitised, stored and managed using hardware and software provided for this purpose. Building Information Modelling (BIM) is used to optimise the design, planning, construction, monitoring of progress and quality, exploitation, maintenance and management of architectural structures, such as buildings, interiors or infrastructure works.

[0005] Extended Reality (XR), an umbrella term for Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR), is also known. In VR, only a virtual image is shown, for example comprising images of obj ects, shapes or models, placed in a virtual environment. In AR, a virtual image, for example comprising texts, labels, symbols, indications or instructions, is merged with a real image of the environment, without any 'interaction' possible with elements in the virtual image. In MR, a virtual image, for example comprising images of obj ects, shapes or models, is merged with a real image of the environment, allowing 'interaction' with elements in the virtual image.

[0006] A virtual image can be generated by means of hardware and software provided for that purpose, for example based on data from a digital database. In AR and MR, the real image of the environment can be recorded, for example by means of a camera, and then displayed, together with the virtual image, on a handheld display, for example the screen of a smartphone or laptop, or viewed directly by a user, where the virtual image is displayed in the user's field of vision, for example by means of a Head-Mounted Display (HMD), a transparent display worn on the head.

[0007] In AR and MR, the virtual image and the real image must be correctly positioned relative to each other. To that end, the position of the device in question, such as a camera or an HMD, relative to its environment, must be determined and tracked using a suitable positioning system. In the context of the invention, 'position' always means 'location and orientation'. In an indoor space, a Local Positioning System (LPS) comprising beacons and receivers attached to the device involved, for receiving electromagnetic signals emitted by the beacons. Outdoors, a Global Navigation Satellite System (GNSS), such as GPS, GLONASS, BeiDou, Galileo, QZSS and NAviC, comprising a network of satellites, receivers for receiving electromagnetic signals emitted by the satellites, and sensors attached to the device involved, such as an Inertial Measurement Unit ( IMU) or an electronic compass, for measuring its position data, can be used for this. For greater accuracy and precision, Differential GPS (DGPS), Precise Point Positioning (PPP), Inertial Navigation Systems (INS), Multi-constellation GNSS or Real-Time Kinematic (RTK) and Virtual Reference Station (VRS) technology can use be used for this. Outdoors, terrestrial transmission masts, for example forming part of a 5G network, and trilateration or triangulation can also be used for this purpose. The position of an associated device, such as a camera or an HMD, can also be determined and tracked relative to its environment by comparing a real-time image of the environment viewed by a user or recorded by a camera with previously recorded and stored images of the environment.

[0008] SUMMARY OF THE INVENTION

[0009] The present invention is intended as a solution that has both the benefits of using Building Information Modelling (BIM) and also the benefits of using Extended Reali ty (XR), in particular Augmented Reality (AR) or Mixed Reality (MR).

[0010] To this end, the invention provides an assembly according to claim 1, a head-worn unit according to claim 12, and a method according to claim 16. Advantageous embodiments are described in the dependent claims.

[0011] In particular, according to a first aspect, the present invention provides an assembly for displaying construction-related data in an image of a construction site, comprising:

[0012] a database and means for digitizing, storing and managing construction-related data using Building Information Modelling (BIM);

[0013] means for generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data;

[0014] a display for displaying the virtual image; and positioning means for the correct relative positioning of the virtual image displayed in the construction site image.

[0015] In an embodiment, the assembly further comprises: a first part of the assembly, comprising the database, arranged at a location spaced apart from the construction site;

[0016] a second part of the assembly, comprising the display, arranged on, or in the immediate vicinity of, the construction site; and

[0017] wherein the assembly also includes means for exchanging data between the first part and the second part.

[0018] In an embodiment, the display is a head-worn transparent display, for example as part of a construction helmet.

[0019] In an embodiment, the positioning means comprise: beacons that form part of a Local Positioning System (LPS);

[0020] receivers connected to the head-worn transparent display for receiving electromagnetic or acoustic signals from the beacons; and

[0021] means for processing the received signals.

[0022] In an embodiment, the positioning means comprise: receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS);

[0023] sensors connected to the head-worn transparent display, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data; and

[0024] means for processing the received signals and the determined position data.

[0025] In an embodiment, the positioning means comprise: receivers for receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network;

[0026] sensors connected to the head-worn transparent display, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data; and

[0027] means for processing the signals received and the determined position data.

[0028] In an embodiment, the display is a hand-held display, for example the display of a smartphone or laptop, and the assembly also comprises a camera for recording the image of the construction site and means for displaying it on the hand-held display.

[0029] In an embodiment, the positioning means comprise: beacons that form part of a Local Positioning System (LPS);

[0030] receivers connected to the camera for receiving electromagnetic or acoustic signals from the beacons; and means for processing the received signals.

[0031] In an embodiment, the positioning means comprise: receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS);

[0032] sensors connected to the camera, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data; and

[0033] means for processing the signals received and the determined position data.

[0034] In an embodiment, the positioning means comprise: receivers for receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network;

[0035] sensors connected to the camera, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data; and

[0036] means for processing the signals received and the determined position data.

[0037] In an embodiment, the positioning means comprise means for recording and storing images of the construction site, and means for comparing a current image of the construction site viewed by the user or recorded by a camera with stored images of the construction site. According to a second aspect, the invention provides a head-worn unit, in particular a unit that can be worn on the head, which is configured to be a part of an assembly or an embodiment thereof as described above, wherein the positioning means at least partially are arranged on the head-worn unit. In an embodiment, the head-worn unit comprises one or more of a helmet, in particular a construction helmet, a hat, a cap, a bonnet, a headband, and the like.

[0038] In an embodiment wherein the positioning means comprise receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) and / or from terrestrial transmission masts, for example forming part of a 5G network, the receivers are arranged on the head-worn unit. An advantage of this embodiment is that the positioning means can determined the position of the head of a user of the assembly based on the electromagnetic signals from satellites and / or from terrestrial transmission masts, which allows to position the virtual image more accurate in the image of the construction site as viewed by the user.

[0039] In an embodiment, the head-worn unit comprises two receivers for electromagnetic signals, which are arranged spaced apart on the head-worn unit. Accordingly this allows to not only determine the position, but also to determine the poise of the head of the user by means of the receivers of electromagnetic signals from satellites and / or from terrestrial transmission masts.

[0040] In an embodiment is a first one of the two receivers arranged at a front of the head-worn unit, and is a second one of the two receivers arranged at a back of the head-worn unit. It is noted that the front of the head-worn unit usually is arranged at or against the forehead of the user, and the back of the head-worn unit usually is arranged at or against the back of the head of the user. According to a third aspect, the invention provides a method for displaying construction-related data in an image of a construction site, comprising the steps of:

[0041] digitizing, storing in a database, and managing construction-related data using Building Information Modelling (BIM);

[0042] generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data;

[0043] displaying of the virtual image by means of a display provided for that purpose, and

[0044] correct relative positioning of the virtual image and the image of the construction site with respect to each other.

[0045] In an embodiment, the method comprises:

[0046] a first part of the system, comprising the database, is at a location away from the construction site, and

[0047] a second part of the system, comprising the display, is located on, or in the immediate vicinity of, the construction site,

[0048] wherein the method also comprises the step of exchanging of data between the first part and the second part.

[0049] In an embodiment wherein the display is a head-worn transparent display, for example as part of a construction helmet, the correct relative positioning comprises:

[0050] receiving electromagnetic or acoustic signals from beacons that form part of a Local Positioning System (LPS) by means of receivers connected to the head-worn transparent display; and

[0051] processing of the received signals.

[0052] In an embodiment wherein the display is a head-worn transparent display, for example as part of a construction helmet, the correct relative positioning comprises the steps of:

[0053] receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) by means of receivers for this purpose;

[0054] determining the position data of the head-worn transparent display by means of sensors connected to it for this purpose, for example an Inertial Measurement Unit ( IMU) or an electronic compass, and

[0055] processing of the received signals and the determined position data.

[0056] In an embodiment wherein the display is a head-worn transparent display, for example as part of a construction helmet, the correct relative positioning comprises the steps of:

[0057] receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network, using receivers provided for this purpose;

[0058] determining position data of the head-worn transparent display by means for sensors connected to it for this purpose, for example an Inertial Measurement Unit ( IMU) or an electronic compass, and

[0059] processing of the received signals and the determined position data.

[0060] In an embodiment wherein the display is a handheld display, for example the display of a smartphone or laptop or MR glasses, the correct relative positioning comprises the step of:

[0061] receiving electromagnetic or acoustic signals from beacons that form part of a Local Positioning System (LPS) by means for receivers connected to the hand-held display, and

[0062] processing of the received signals.

[0063] In an embodiment wherein the display is a handheld display, for example the display of a smartphone or laptop or MR glasses, the correct relative positioning comprises the steps of:

[0064] receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) by means of receivers for this purpose;

[0065] recording the image of the construction site by means of a camera provided for this purpose and displaying it on the hand-held display;

[0066] determining position data of the camera by means of sensors connected to it for this purpose, for example an Inertial Measurement Unit ( IMU) or an electronic compass; and

[0067] processing of the received signals and the determined position data.

[0068] In an embodiment wherein the display is a handheld display, for example the display of a smartphone or laptop or MR glasses, the correct relative positioning comprises the step of:

[0069] receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network, using receivers provided for this purpose;

[0070] recording the image of the construction site by means for a camera provided for this purpose and displaying it on the hand-held display;

[0071] determining the position data of the camera by means of sensors connected to it for this purpose, for example an Inertial Measurement Unit (IMU) or an electronic compass; and

[0072] processing of the received signals and the determined position data.

[0073] In an embodiment, the correct relative positioning comprises the steps of:

[0074] recording and storing images of the construction site, and

[0075] comparing a current, user-observed or camera-recorded image of the construction site with stored images of the construction site.

[0076] The various aspects and features described in the specification and claims of this application and / or shown in the drawings of this application, can be applied individually from each other, wherever possible. These individual aspects, and other aspects can be made subject of divisional patent applications. This relates in particular to measures and features described in the dependent claims.

[0077] BRIEF DESCRIPTION OF THE DRAWINGS

[0078] The invention will be elucidated on the basis of an exemplary embodiment shown in the attached drawings, in which:

[0079] Figure 1 shows a schematical view of a helmet that can be part of an assembly according to the invention, wherein the view shows the helmet diagonally from the front;

[0080] Figure 2 shows a schematical view of the helmet of figure 1, wherein the view shows the helmet diagonally from the back;

[0081] Figure 3 shows a schematical view of the helmet of figures 1 and 2, wherein the view shows the helmet diagonally from above and wherein the protective cover for the external unit that is mounted on the helmet, is removed; and

[0082] Figure 4 shows a schematic view of additional elements that can be connected to the helmet, which can be carried by the user during use, for example in a bag on a belt, such as a shoulder strap or a trouser belt.

[0083] DETAILED DESCRIPTION OF THE DRAWINGS

[0084] An assembly according to the invention comprises a database and means for digitizing, storing and managing construction-related data by means of Building Information Modelling (BIM), as well as means for generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data, as well as a display to reproduce the virtual image, and also positioning means for the correct relative positioning of the virtual image reproduced in the image of the construction site. This allows the digitized construction-related data on site to be shown to a user in an real image of the construction site, and correctly positioned within it.

[0085] In a preferred embodiment, a first part of the assembly, comprising the database, is placed at a location away from the construction site, and a second part of the system, comprising the display, is located at, or in close proximity to, the construction site, and the assembly also comprises means for exchanging data between the first part and the second part. This enables construction-related data to be digitized remotely from the construction site, for example in a back office, stored in the database, and managed, and displayed in the real image of the construction site on the construction site using the display device. With this, the live real image of the construction site can for example also be sent to the remote location continuously. In this way, amended or to-be-amended construction-related data and the current real image of the construction site can be exchanged continuously between the construction site and the remote location, and with this a construction process can for example be monitored and controlled remotely.

[0086] The display device may be a head-mounted transparent display, for example forming part of a construction helmet. A user can then view the real image of the construction site directly, while the virtual image comprising the construction-related data is viewed on the display. The display device may also be a hand-held display, for example the display of a smartphone or laptop, whereby the assembly also includes a camera for recording the real image of the construction site and means for displaying it on the hand-held display.

[0087] If the construction site is located in an indoor space, the positioning means may comprise beacons that form part of a Local Positioning System (LPS). In the case of a head-worn transparent display or a hand-held display, the positioning means shall also include receivers connected to the display and / or to the camera, for receiving electromagnetic or acoustic signals from the beacons, and also means for processing the received signals. This allows to determine the location and orientation of the display and / or the camera with respect to the environment, and to correctly position the virtual image comprising the construction-related data in the real image of the construction site, and display it to the user.

[0088] If the construction site is located outdoors, the positioning means may comprise receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) or from terrestrial masts, for example forming part of a 5G network. In the case of a head-worn transparent display and / or a hand-held display, the positioning means also include sensors connected to the display and / or to the camera, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data, and also means for processing the received signals and the determined position data. This in turn allows the location and orientation of the display and / or camera to be determined in relation to the surroundings, and to correctly position the virtual image comprising the construction-related data in the real image of the construction site, and displaying it to the user.

[0089] In another embodiment, the positioning means comprise means for recording and storing images of the construction site, and also means for comparing a real-time image of the construction site, viewed by a user or recorded by means of a camera, with the stored images of the construction site.

[0090] In particular, Figures 1 and 2 provide a schematic view of a helmet 10, in particular a construction helmet, which can be part of an assembly according to the invention. Figure 1 shows the helmet 10 diagonally from the front, and figure 2 shows the helmet diagonally from the back.

[0091] The helmet 10 comprises a helmet shell 11 that is provided with adjustable headbands 12 and / or damping material on the inside.

[0092] On the outside of the helmet shell 11, an external unit 12 is provided, which extends from the front towards the back over the helmet shell 11. As shown in figure 1, the front side of the external unit 12 is provided with a visor 15 with a antenna housing 13 integrated with this. Furthermore, the front side of the helmet 10 is provided with a fixation 18 for a hinged frame 16 for goggles, which are arranged under the visor 15. In figure 1, the frame 16 is arranged in a downward position, whereby a user can look through the glasses 17 of the goggles. The frame 16 may also hinge forward, in particular towards a substantially horizontal position wherein the googles are arranged directly underneath the visor 15, and wherein a user can view the surroundings under the goggles.

[0093] In the example of figure 1 the goggles comprises so-called Extended Reality goggles, also referred to as XR-goggles, which are configured to combine a virtual image, in particular comprising construction-related data, with an image of the surroundings, in particular a building site, and to make the combined image visible for a user that wears the helmet 10 on his head. In the example, the XR-goggles further comprises several cameras 19, 20 for observing of the surroundings. The XR-goggles is furthermore provided with arms 22 which extend towards the ears of a user, at least in the downward position of figure 1, and which are provided with speakers for playing sound, if desired.

[0094] As shown in figure 2, the external unit 12 extend towards the back over the helmet shell 11, wherein the back part of the external unit 12 is provided with air vents for colling of the electronic components inside the externa unit 12. The back side of the external unit 12 is furthermore provided with a second antenna housing 14, and a backwards looking camera 21. In addition, cables 23 for connecting with an external control unit and / or power supply 52 are arranged at the back side as schematically shown in figure 4.

[0095] Figure 3 shows a schematic view of the helmet 10 of figures 1 and 2, wherein the view the helmet diagonally from above shows, and wherein the protective cover for the external unit 12 is removed. As shown in figure 3, the external unit 12 comprises a frame 30 which is fixedly connected to the shell 11 of the helmet 10. The frame 30 provides strength and stability for the external unit 12, and provides a basis for the components mounted thereon. These components comprise, among other things, a first antenna 31 for receiving signals from a Global Navigation Satellite system (GNSS) and / or from terrestrial transmission masts, wherein the first antenna 31 is arranged at the front side of the helmet 10, and a second antenna 32 for receiving signals from a Global Navigation Satellite system (GNSS) and / or from terrestrial transmission masts, wherein the second antenna 32 is arranged at the back side of the helmet 10. As schematically shown in figure 3, the first antenna 31 and the second antenna 32 are arranged spaced apart in a direction which extends from the front to the back. In addition, the first antenna 31 and the second antenna 32 are arranged at different heights on the frame 30 such that the first antenna 31 and the second antenna 32 are also spaced apart in a vertical direction, at least when the helmet 10 is worn by a user on his head.

[0096] Furthermore, the components may comprise one or more printed circuit boards 34, wherein the printed circuit boards may be provided with a micro-controller, a receiver for electromagnetic signals as picked-up by the first and / or second antenna 31, 32, and one or more sensors, such as for example an Inertial Measurement Unit ( IMU), a gyroscope and / or an electronic compass.

[0097] In addition, the printed circuit boards 34 may also be provided with a communication unit for communication with external peripherals. The communication unit is, for example, configured for sending and / or receiving signals from external peripherals by means of Bluetooth and via a Bluetooth antenna 33. These peripherals may comprise, for example, an external computer that comprises the database with construction-related data. This external computer may be configured for receiving position and orientation data from the helmet 10, for generating, based on digitized construction-related data, a virtual image comprising the construction-related data, and for sending the virtual image to the helmet 10.

[0098] Preferably, the micro-controller is configured to combine the signals of the positioning means, such as the first antenna 31, the second antenna 32, the cameras 19, 20, 21, and / or the sensors, such as for example an Inertial Measurement Unit (IMU), a gyroscope and / or an electronic compass, to a determination of the position and orientation of the helmet 10. This position and orientation of the helmet 10 can subsequently be used for correct relative positioning of the displayed virtual image in an image of the surroundings. In particular for correct relative positioning of a virtual image with construction-related data in an image of the building site.

[0099] The backwards looking camera 21 is arranged on the frame 30, as shown in figure 3, and the connection cables 23 are preferably connected to the frame by means of a strain relief. At the front part of the frame 30 the fixation 18 for the hinged frame 16 for the XR-goggle is provided, as shown in figure 1.

[0100] Figure 4 shows supplementary elements 52, such as a control device and / or a battery, which may be connected to the helmet 10 via the cables 23, and which, in use, can be carried by the user in a bag 51 which is connected to a belt 53. This allows to carry relative heavy components and / or elements, such as a battery, separate from the helmet 10, which reduces strain on the head and / or neck of the user.

[0101] In summary, the invention relates to an assembly, a head-worn unit, and a method for displaying construction-related data in an image of a construction site. The assembly is configured for performing the method comprising the steps of:

[0102] digitizing, storing in a database, and managing construction-related data using Building Information Modelling (BIM);

[0103] generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data;

[0104] displaying of the virtual image by means of a display provided for that purpose, and

[0105] correct relative positioning of the virtual image and the image of the construction site with respect to each other.

[0106] The head-worn unit is configured to be part of the assembly, and in particular for displaying construction-related data in combination with the virtual image in an image of the construction site by using Extended Reality (XR), in particular Augmented Reality (AR) or mixed Reality (MR).

[0107] The above description is included to illustrate the operation of the preferred embodiments of the invention and is not meant to limit the scope of the invention. From the above discussion, many variations will be apparent to one skilled in the art that would yet be encompassed by the scope of the present invention.

Claims

C L A I M S1. An assembly for displaying construction-related data in an image of a construction site, comprising:a database and means for digitizing, storing and managing construction-related data using Building Information Modelling (BIM);means for generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data;a display for displaying the virtual image; and positioning means for the correct relative positioning of the virtual image displayed in the construction site image.

2. The assembly according to claim 1, further comprising:a first part of the assembly, comprising the database, arranged at a location spaced apart from the construction site;a second part of the assembly, comprising the display, arranged on, or in the immediate vicinity of, the construction site; andwherein the assembly also includes means for exchanging data between the first part and the second part.

3. The assembly according to claim 1 or 2, wherein the display is a head-worn transparent display, for example as part of a construction helmet.

4. The assembly according to claim 3, wherein the positioning means comprise:beacons that form part of a Local Positioning System (LPS);receivers connected to the head-worn transparentdisplay for receiving electromagnetic or acoustic signals from the beacons; andmeans for processing the received signals.

5. The assembly according to claim 3 or 4, wherein the positioning means comprise:receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS);sensors connected to the head-worn transparent display, for example an Inertial Measurement Unit (IMU) or an electronic compass, for determining its position data; andmeans for processing the received signals and the determined position data.

6. The assembly according to claim 3, 4 or 5, wherein the positioning means comprise:receivers for receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network;sensors connected to the head-worn transparent display, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data; andmeans for processing the signals received and the determined position data.

7. The assembly according to any one of the claims 1 - 6, wherein the display is a hand-held display, for example the display of a smartphone or laptop, and the assembly also comprises a camera for recording the image of the construction site and means for displaying it on the hand-held display.

8. The assembly according to claim 7, wherein the positioning means comprise:beacons that form part of a Local Positioning System (LPS);receivers connected to the camera for receiving electromagnetic or acoustic signals from the beacons; and means for processing the received signals.

9. The assembly according to claim 7 or 8, wherein the positioning means comprise:receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS);sensors connected to the camera, for example an Inertial Measurement Unit (IMU) or an electronic compass for determining its position data; andmeans for processing the received signals and the determined position data.

10. The assembly according to claim 7, 8 or 9, wherein the positioning means comprise:receivers for receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network;sensors connected to the camera, for example an Inertial Measurement Unit ( IMU) or an electronic compass, for determining its position data; andmeans for processing the received signals and the determined position data.

11. The assembly according to any one of the claims 7 - 10, wherein the positioning devices comprise:means for recording and storing images of the construction site, andmeans for comparing a current image of the construction site viewed by the user or recorded by a camera, with stored images of the construction site.

12. A head-worn unit which is configured to be apart of an assembly according to any one of the claims 1 –11, wherein the positioning means at least partially are arranged on the head-worn unit, preferably wherein the head-worn unit comprises a construction helmet.

13. The head-worn unit according to claim 12, wherein the positioning means comprise receivers for receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) and / or from terrestrial transmission masts, for example forming part of a 5G network, the receivers are arranged on the head-worn unit.

14. The head-worn unit according to claim 13, wherein the head-worn unit comprises two receivers for electromagnetic signals, which are arranged spaced apart on the head-worn unit.

15. the head-worn unit according to claim 14, wherein a first one of the two receivers is arranged at a front of the head-worn unit, and a second one of the two receivers is arranged at a back of the head-worn unit.

16. A method for displaying construction-related data in an image of a construction site, comprising the steps of:digitizing, storing in a database, and managing construction-related data using Building Information Modelling (BIM);generating, on the basis of the digitized construction-related data, a virtual image comprising the construction-related data;displaying of the virtual image by means of a display provided for that purpose, andcorrect relative positioning of the virtual image and the image of the construction site with respect to each other.

17. The method according to claim 16, further comprising:a first part of the system, comprising the database, which is at a location away from the construction site, anda second part of the system, comprising the display, which is located on, or in the immediate vicinity of, the construction site,wherein the method also comprises the step of exchanging of data between the first part and the second part.

18. The method according to claim 17, wherein the display is a head-worn transparent display, for example as part of a construction helmet, wherein the correct relative positioning comprises the steps of:receiving electromagnetic or acoustic signals from beacons that form part of a Local Positioning System (LPS) by means of receivers connected to the head-worn transparent display; andprocessing of the received signals.

19. The method according to claim 17 or 18, wherein the display is a head-worn transparent display, for example as part of a construction helmet, wherein the correct relative positioning comprises the steps of:receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) by means of receivers for this purpose;determining the position data of the head-worn transparent display by means of sensors connected to it for this purpose, for example an Inertial Measurement Unit ( IMU) or an electronic compass, andprocessing of the received signals and the determined position data.

20. The method according to claim 17, 18 or 19, wherein the display is a head-worn transparent display, for example as part of a construction helmet, wherein the correct relative positioning comprises the steps of:receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network, using receivers provided for this purpose;determining position data of the head-worn transparent display by means for sensors connected to it for this purpose, for example an Inertial Measurement Unit ( IMU) or an electronic compass, andprocessing of the received signals and the determined position data.

21. The method according to any one of the claims 17 - 20, wherein the display is a hand-held display, for example the display of a smartphone or laptop or MR glasses, wherein the correct relative positioning comprises the steps of:receiving electromagnetic or acoustic signals from beacons that form part of a Local Positioning System (LPS) by means for receivers connected to the hand-held display, andprocessing of the received signals.

22. The method according to any one of the claims 17 - 21, wherein the display is a hand-held display, for example the display of a smartphone or laptop or MR glasses, wherein the correct relative positioning comprises the steps of:receiving electromagnetic signals from satellites forming part of a Global Navigation Satellite System (GNSS) by means of receivers for this purpose;recording the image of the construction site by means of a camera provided for this purpose and displaying it on the hand-held display;determining the position data of the camera bymeans of sensors connected to it for this purpose, for example an Inertial Measurement Unit (IMU) or an electronic compass; andprocessing of the received signals and the determined position data.

23. The method according to any one of the claim 17 - 22, wherein the display is a hand-held display, for example the display of a smartphone or laptop or MR glasses, wherein the correct relative positioning comprises the steps of:receiving electromagnetic signals from terrestrial transmission masts, for example forming part of a 5G network, using receivers provided for this purpose;recording the image of the construction site by means for a camera provided for this purpose and displaying it on the hand-held display;determining the position data of the camera by means of sensors connected to it for this purpose, for example an Inertial Measurement Unit (IMU) or an electronic compass; andprocessing of the received signals and the determined position data.

24. The method according to claim 22 or 23, wherein the correct relative positioning comprises the steps of:recording and storing images of the construction site, andcomparing a current, user-observed or camera-recorded image of the construction site with stored images of the construction site.

25. Computer-readable medium having computerexecutable instructions adapted to cause an assembly according to any one of the claims 1 –11, or a head-worn unit according to any one of the claims 12 - 15, to performa method according to claim 16 - 24.

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