METHOD FOR EVALUATING THE INSTALLATION POSITION OF A MEASURING DEVICE IN A PLANT, AUGMENTED REALITY DEVICE AND METHOD FOR INSTALLATION OF A MEASURING DEVICE

Description

[0001] The invention relates to a method for evaluating the installation position of a measuring device, namely a flow meter or a level meter, in a system with an augmented reality device, wherein the augmented reality device has at least one detection unit for detecting the system, at least one computing unit and at least one display unit.

[0002] Furthermore, the invention relates to an augmented reality device with at least one detection unit for detecting the system, at least one computing unit and at least one display unit.

[0003] Furthermore, the invention relates to a method for installing a flow meter or level meter in a system.

[0004] When installing measuring devices in existing systems or replacing existing ones, certain conditions regarding the device's position and type must be met to ensure correct operation. For example, parameters to consider when installing flow meters include the recommended inlet and outlet lengths, the positioning relative to downpipes or bends, and the position relative to other system components such as valves or pumps. It is not always possible to fully meet all these factors simultaneously, especially in the case of installing a measuring device in an existing system. For instance, the existing piping may not allow for adherence to the manufacturer's recommended inlet and outlet lengths. Therefore, an "optimal" compromise is required under the given constraints.

[0005] German patent application DE 10 2018 104 056 B3 discloses a method for the optimized arrangement and alignment of a field device with a module that emits radiation invisible to the human eye, using an augmented reality device. The alignment is optimized by superimposing the radiation pattern with the reality component, thereby enabling the determination of objects positioned within the radiation pattern. This eliminates the need for time-consuming testing of the field device's transmission and reception characteristics.

[0006] German patent application DE 10 2017 010190 A1 discloses a method for virtually configuring a bioprocessing facility using an augmented reality system. This method allows a user to capture a physical component of the bioprocessing facility in their physical environment using a camera of the augmented reality system, and then assemble it as a virtual component in a virtual environment with other virtual components to form a virtual bioprocessing facility. The user can select a virtual component for repositioning within the virtual environment and add further virtual components to the virtual environment. A computing unit determines the optimal position within the virtual environment for the selected virtual component.The virtual bioprocessing facility is calculated and displayed via a display of the augmented reality system.

[0007] Furthermore, the use of augmented reality devices in various fields of application is known from documents US 2019 / 0035152 A1, US 2013 / 0144482 A1, US 2017 / 0255450 A1 and US 2016 / 0247324.

[0008] Further state of the art in the present technical field can be found in the publications DE 10 2018 214210 A1, US 2013 / 038633 A1, US 2018 / 129276 A1, US 2019 / 020721 A1 and US 2017 / 076500 A1.

[0009] The object of the present invention is to provide, starting from the prior art described, an improved method for evaluating the installation position of a measuring device. Furthermore, the invention provides a corresponding augmented reality device and a method for installing a measuring device in a system.

[0010] According to a first teaching of the invention, the aforementioned problem is solved by a method according to claim 1.

[0011] According to the invention, it has been recognized that the installation position of an already installed measuring device or a measuring device to be installed can be virtually checked and evaluated with regard to the installation specifications to ensure correct functioning, so that incorrect installation can be detected and / or avoided. The basic idea is based on the creation of a virtual 3D and / or 2D model of the real system, wherein, in particular, the measuring device to be evaluated is assigned manually and / or automatically by the processing unit, and / or wherein a virtual measuring device can preferably be manually positioned at the desired installation location in the model of the system. The identified measuring device or the measuring device placed in the system is linked to a list of installation criteria, whereby, to evaluate the installation position of the measuring device, the processing unit checks whether and to what extent the installation criteria are met.

[0012] The assignment of the measuring device includes both the identification of the type of measuring device, i.e., whether it is a flow meter or a level meter, and the identification of the measuring device type. Furthermore, the assignment also includes the identification of whether it is a compact device or a remote device.

[0013] A compact device is a measuring instrument that includes all components, particularly for controlling the instrument and evaluating the measured data. In contrast, a remote device is a measuring instrument in which at least one component is not directly attached to the instrument and which can be operated remotely.

[0014] According to an advantageous embodiment, the augmented reality device comprises at least one AR headset, smart glasses, at least one smartphone, or at least one tablet. Other devices that enable the visualization of a real system and / or the superimposition of such a visualization with a virtual measuring device are also suitable for implementing the method according to the invention.

[0015] Particularly preferably, the acquisition unit for creating the model of the system forwards image data and / or video data and / or thermal imaging data and / or stereo data and / or depth camera data to the processing unit and / or the display unit. According to a preferred embodiment, the acquisition unit comprises at least one camera and / or a thermal imaging camera and / or a depth camera.

[0016] Another embodiment is characterized by the fact that the computing unit recognizes the type and / or size and / or length and / or orientation of individual components of the system based on the data transmitted by the acquisition unit.

[0017] Specifically, the components of the system include valves, pumps, pipes, pipe connectors, pipe sections, gates, siphons, tanks and / or measuring instruments.

[0018] Alternatively or additionally, the type and / or size and / or length and / or orientation of individual components of the system can be manually entered and / or corrected by the user.

[0019] If the component is a pipe, a pipe section or a pipe connector, the size includes in particular the inner and / or the outer pipe diameter.

[0020] According to a further embodiment, the processing unit also recognizes the orientation of the measuring device to be evaluated and / or the components of the system. Particularly preferably, the processing unit determines the flow direction of a medium through the system, especially based on the orientation of the measuring device and / or the components of the system and / or taking into account the marking of the measuring device and / or the marking of at least one component of the system.

[0021] Alternatively, the flow direction can also be specified by the user, for example by swiping across the display unit.

[0022] According to the invention, the measuring device whose installation position is to be assessed is a level gauge or a flow meter. When installing such measuring devices in existing systems, various requirements, particularly regarding the position of the installed measuring device, must be considered to ensure correct operation. The method according to the invention advantageously allows for testing and demonstrating whether the requirements are met at the intended installation location of the measuring device. The method according to the invention is particularly advantageous for determining the installation position of a plurality of measuring devices of different types or even identical measuring devices.

[0023] According to the invention, installation criteria are used to evaluate the installation position of the at least one detected and / or virtual flow meter or level meter, wherein the installation criteria take into account the relative position of the flow meter or level meter to at least one other component of the system and / or the flow direction of a medium and / or the type of measuring device and / or the installation environment of the flow meter or level meter.

[0024] If the measuring device to be installed is a compact device, the installation criteria also include checking whether there is sufficient space for the installation of such a measuring device.

[0025] According to one embodiment of the method, the installation criteria also include the orientation of the measuring device. If the detected or virtually positioned flow meter is a compact device, the processing unit specifically checks the positioning of the converter housing.

[0026] If the converter housing is positioned to the side of the flow meter, the orientation of the flow meter is considered unsuitable. In suitable orientations, the converter housing is positioned above or below the measuring tube of the flow meter.

[0027] Furthermore, when assessing the installation position of a flow meter, positions are considered unsuitable where, for example, the flow meter is installed on the suction side of a pump and / or where the flow meter is installed behind a valve or gate and / or where the flow meter is installed in a downpipe.

[0028] To determine the suitability of the installation position, it is preferably also taken into account whether the flow meter is installed in a horizontal pipe and / or whether a siphon is present before a free outlet to ensure a completely filled pipe and / or whether the recommended length of the inlet before the flow meter is maintained and / or whether the recommended length of the outlet after the flow meter is maintained and / or whether the diameter of the measuring tube of the flow meter to be installed substantially matches the diameter of the system's piping and / or whether a reduction in diameter is present before the meter and / or whether the height of the display of the measured values ​​is suitable for reading, preferably whether the display is arranged at a height between 0.5 m and 1.70 m, particularly preferably at a height of approximately 1.1 m.

[0029] Particularly important in determining the assessment is consideration of whether the system is likely to experience vibrations at its installation location. If the expected vibrations exceed a certain threshold, the processing unit suggests a remote device.

[0030] Furthermore, to determine the assessment of the installation position, it is preferably also taken into account whether the recommended distance between a T-piece and the inlet of the flow meter is maintained.

[0031] If the flow meter has a V-shaped or U-shaped curved measuring tube, it is preferably also checked whether the curvature of the flow meter is oriented upwards when measuring gases or downwards when measuring liquids. This is because condensate or gases can collect in the curve.

[0032] Particularly in hygienic applications where pipes must be completely emptied, it is preferable to check whether the bend in V-shaped flow meters is positioned so that the flow meters can always run completely dry. This requirement is met when the bend is oriented to the side.

[0033] In addition to evaluating the installation position and orientation of a flow meter, the processing unit can also preferably display recommendations for further optimization of the monitored system and thus for optimizing the boundary conditions of the meter's installation position. For this purpose, the processing unit checks further optimization criteria.

[0034] It is particularly recommended to install an automatic air release valve at the top of a downpipe if this downpipe overcomes a height difference of more than 5 m in order to remove gases that escape from the liquid medium through cavitation from the pipe, so as not to distort the flow profile.

[0035] Preferably, additional space requirements for thermal insulation are also taken into account, with the augmented reality device containing information on which components of the measuring device must not be covered with thermal insulation.

[0036] If the detected flow meter is a Coriolis mass flow meter, a stable suspension of the piping system is recommended to prevent the weight of the meter from bending the pipes of the system.

[0037] It is also particularly recommended to protect the flow meters from strong sunlight.

[0038] If the measuring device to be evaluated is a level measuring device, then relevant criteria for the installation of the level measuring device must be checked.

[0039] The assessment of the installation position includes, in particular, a representation of suitable and unsuitable installation positions. The representation of the assessment may, for example, include a checkmark for a suitable installation position and a cross for an unsuitable installation position.

[0040] In addition to classifying a position as suitable or unsuitable, it is also possible to define gradations between the aforementioned ratings and preferably display them via the display unit. This allows for the comparison of different, fundamentally suitable installation positions.

[0041] According to one embodiment, the installation position is assessed on a scale, with the assessment being indicated by a color code and / or a numerical value and / or another scalable parameter.

[0042] Preferably, the evaluation includes an overall evaluation, whereby the overall evaluation results from the combination of several individual evaluations, each individual evaluation relating to the evaluation of a single installation criterion.

[0043] The individual installation criteria are given particular weight when determining the overall rating. The weighting can be fixed for all ratings or set for individual ratings, especially by the user.

[0044] According to an advantageous embodiment, the overall evaluation of the installation position of a flow meter includes querying and evaluating at least one of the following criteria, wherein the evaluation of whether the specified criteria are met is quantified by an evaluation parameter xi in each case: Is the measuring device positioned downstream of a valve and / or upstream of a pump? If yes, x1 = 0; otherwise, x1 = 1. Is the measuring device installed in a downpipe? If yes, x2 = 0; otherwise, x2 = 1. Is the measuring tube diameter larger than the piping diameter? If yes, x3 = 0; otherwise, x3 = 1. Determination of the evaluation parameter for the recommended inlet length x4 = (actual inlet / recommended inlet), where x4 is limited to a maximum of 1. Determination of the evaluation parameter for an inlet length optimized by a reduction x5. If the evaluation parameter x4 = 1, then x5 = 1; otherwise, x5 = x4 * x4. Determination of the evaluation parameter for the recommended outlet length x6 = (actual outlet / recommended outlet), where x6 is limited to a maximum of 1. Is the display of the measuring device positioned for good visibility? If the display is covered, then x 7 = 0. If the display is visible, then x 7 = exp − 1 * 1 , 1 m − einbauhöhe_in_m ∧ 2 . If the installation angle of the measuring device relative to the horizontal axis is greater than the arctangent of the ratio of the device's inner diameter to the actual inlet length, then x8 = 1. If the installation angle of the measuring device relative to the horizontal axis is less than the arctangent of the ratio of the device's inner diameter to the actual inlet length, and a siphon or riser pipe is located downstream of the measuring device, then x8 = 1. Otherwise, x8 = 0. Is the measuring device located on a partially filled pipe? If so, x9 = 0; otherwise, x9 = 1. Is there sufficient space for a compact device? If so, x10 = 1; otherwise, x10 = 0.

[0045] Each of the criteria described above corresponds to one of the individual criteria mentioned above for determining an overall rating.

[0046] The overall assessment of the installation position of a measuring device results from the overall consideration of the assessment parameters xi , where i = 1...10. If one of the assessment parameters xi = 0, then according to one embodiment the overall assessment is also 0 and the installation position is assessed as poor or unsuitable.

[0047] The overall rating is preferably derived from an average of the individual rating parameters xi. The highest average rating is considered the best-rated installation position.

[0048] Alternatively, the overall rating can also be determined by summing the individual rating parameters xi. It is also conceivable that the individual rating parameters xi are combined using a different arithmetic operation.

[0049] By determining the overall rating, which can take on different values ​​for different positions within the system, individual positions can be compared with regard to a possible installation position of a measuring device.

[0050] According to one embodiment, an optimal installation position is defined by the fact that, on the one hand, the overall rating is the best-rated installation position and, on the other hand, the value of the overall rating is above a threshold, in particular greater than 0.5 or greater than 1.

[0051] A further embodiment of the procedure is characterized by the fact that if the overall rating of an installation situation is too poor, in particular too low, for example if the overall rating is below the specified threshold, the computing unit determines an installation position with a better, in particular higher, overall rating, preferably taking into account virtual structural changes to the system, and displays it via the display unit.

[0052] To this end, the processing unit preferably first determines the evaluation parameters xi whose value was 0 or whose value was below the defined threshold, and virtually modifies the system to meet the corresponding requirement and increase the value of the relevant evaluation parameter xi. For example, in the case of a suboptimal inlet section, installing a reducer can increase the evaluation parameter x by 4. Subsequently, the overall evaluation of the installation position is recalculated based on the modified system.

[0053] According to another preferred embodiment, each structural change to the plant is linked to a cost factor for the respective structural change.

[0054] The user is given priority in selecting the installation position with the best rating and lowest conversion costs as the optimization suggestion. The weighting of costs and the optimization of the installation position can be adjusted and defined by the user for each individual case.

[0055] According to the invention, the computing unit determines an optimal installation position for the flow meter or level sensor in the system, taking into account the installation criteria, particularly the weighted ones, and the optimal installation position is displayed in the system visualization. This has the advantage that the best possible installation position can be determined considering the system's characteristics, even if not all requirements for installing the measuring device can be met.

[0056] To determine the optimal installation position, the ratings, especially the overall ratings, of all possible installation positions are compared according to a particularly preferred embodiment. According to the invention, the installation position with the best, especially the highest, rating is displayed as the optimal installation position via the display unit. According to this embodiment, different installation positions can be objectively compared with one another, i.e., based on their overall ratings, so that an optimal installation position for the existing system can be determined.

[0057] According to the invention, at least one component of the system is modified virtually by the user and / or the computing unit with regard to its type, position, dimensions, and / or orientation in the visualization of the system, and / or at least one component is added to and / or removed from the visualization of the system, so that, as a result, the system is at least partially modified virtually, and the installation position of the flow meter or level sensor in the modified system is evaluated, and / or the optimal installation position of the flow meter or level sensor in the modified system is determined. This embodiment particularly advantageously allows for an evaluation of which modifications to the existing system are necessary to improve the installation situation for the measuring device.

[0058] The processing unit preferably determines the installation criteria that are not fully met, or not at all met, by the installation position of the detected or virtual measuring device in the system. These unmet or partially met installation criteria are preferably displayed to the user via the display unit. A suggested optimization, including a modification to the system, is also preferably displayed.

[0059] For example, one embodiment suggests that, in cases where a flow meter is installed in a horizontal pipe, a slight incline in the pipe should be incorporated. Furthermore, the computing unit proposes installing a remote device, for instance, in cases where there is insufficient space for a compact unit.

[0060] According to a further advantageous embodiment, the augmented reality device has a storage unit in which data from a plurality of measuring devices and / or from a plurality of other components of the system are stored, wherein the processing unit determines, in particular, the type of measuring device and / or the type and / or dimensions of at least one other component based on the stored data. Particularly preferably, the stored data includes, in particular, installation criteria for the installation of a measuring device.

[0061] By comparing or retrieving the data stored in the memory unit, the identified measuring device and / or other system components can be assigned particularly easily and reliably. Furthermore, the installation criteria to be checked for the detected measuring device under test can be accessed directly.

[0062] It is particularly preferred if at least one measuring device can be replaced by the user and / or the processing unit in the visualization, i.e., the visual representation of the system, with an alternative measuring device, and if the installation position of the alternative measuring device in the system is evaluated and / or the optimal installation position of the alternative measuring device in the system is determined. According to this configuration, it can be assessed whether a different measuring device than the one initially considered is more suitable for the given installation situation.

[0063] According to a second teaching of the present invention, the problem set out at the beginning is solved by an augmented reality device according to claim 10.

[0064] According to a third teaching of the present invention, the problem set out at the outset is solved by a method for installing a flow meter or level meter in a system according to claim 11.

[0065] Preferably, the system is structurally modified before the installation of the measuring device in accordance with the optimization proposal suggested in the procedure for evaluating the installation position.

[0066] In detail, there are numerous possibilities for designing and further developing the methods and augmented reality device according to the invention. Reference is made to the claims subordinate to the independent claims, as well as to the following description of preferred embodiments in conjunction with the drawing. The drawing shows: Fig. 1 shows a first embodiment of an augmented reality device according to the invention, Fig. 2 shows a second embodiment of an augmented reality device according to the invention, Fig. 3 shows a first embodiment of a method according to the invention for evaluating the installation position of a measuring device, Fig. 4 shows a second embodiment of a method according to the invention, Fig. 5 shows a further embodiment of a method according to the invention, and Fig. 6 shows an embodiment of a method according to the invention for installing a measuring device in a system.

[0067] Fig. 1 Figure 1 shows a first embodiment of an augmented reality device 1 comprising a capture unit 4 for capturing the real system 5, a processing unit 6, and a display unit 7. The capture unit 4 includes a camera with which the existing system 5 can be captured. In particular, the capture unit 4 captures a measuring device 3 installed in the system. During operation, the capture unit 4 forwards the captured data to the processing unit 6, which in turn processes the data for visualization and forwards it to the display unit 7. The display unit 7 is designed such that it displays the captured system 5 during operation.

[0068] The processing unit 6 is also designed to recognize the type and / or size of the individual components of the system 5; in particular, the processing unit recognizes the built-in measuring device 3. For this purpose, a storage unit 8 is provided, in which data from a plurality of measuring devices and from various components of the system 5 are stored. Specifically, specifications for the installation of the measuring devices are stored for each individual measuring device. By comparing the data acquired by the acquisition unit 4 with the data stored in the storage unit 8, the processing unit 6 can, in particular, determine the type of measuring device.

[0069] Furthermore, the computing unit 6 is designed in such a way that it evaluates the installation position of the detected measuring device 3 based on the stored installation criteria and outputs this evaluation in the form of a color marking of the measuring device 3 via the display unit 7.

[0070] In addition to evaluating the installation position of the recorded measuring device 3, the computing unit 6 can also suggest an optimal installation position 9 for the measuring device 3 present in the system 5 based on the stored installation criteria.

[0071] Furthermore, the computing unit 6 can also suggest an alternative measuring device 3 or a change in the existing system 5 based on the data stored in the storage unit 8 in order to improve the installation situation of the measuring device 3.

[0072] Fig. 2 Figure 1 shows another embodiment of an augmented reality device 1. In the illustrated embodiment, the augmented reality device is designed as a smartphone. The display unit 7 is designed as a screen. The relevant area of ​​the system 5 is visually represented on the screen. The flow direction of the medium flowing through the depicted pipe system is indicated by the arrows. In addition, four measuring devices 3 are shown, which are virtually placed in the system 5 by the user.

[0073] The installation position of each individual measuring device 3 is evaluated by the computing unit 6, which is not shown here, whereby the evaluation is represented by a check mark for a well-suited installation situation and by a cross for a poorly suitable installation position.

[0074] In Fig. 3 is a first embodiment of a method 2 for evaluating the installation position of a measuring device 3 with an augmented reality device 1, wherein the augmented reality device 1 is configured according to the Fig. 1 is designed as shown in the illustrated embodiment.

[0075] Procedure 2 comprises the following steps: In a first step, the system 5 is recorded by the recording unit 4. In particular, a measuring device 3 and the installation situation surrounding the measuring device 3 are recorded.

[0076] The recorded system 5 is visually displayed on the display unit 7 11.

[0077] The calculation unit 6 assigns the detected measuring device 3 to 12.

[0078] Based on the assignment, the installation position of the measuring device is evaluated by the computing unit 13.

[0079] Finally, the rating is displayed on display unit 7 14.

[0080] Fig. 4 Figure 1 shows a second embodiment of a method 2 for evaluating the installation position of a measuring device 3 with an augmented reality device 1, wherein the augmented reality device 1 is configured according to the method described in Figure 2. Fig. 1 is designed as shown in the illustrated embodiment.

[0081] Just as in the one in Fig. 3 In the described procedure 2, the system 5 is first recorded by the recording unit 4 10. In detail, the area of ​​the system 5 in which a measuring device 3 is to be installed is recorded.

[0082] This area of ​​the system 5 is visually displayed on the display unit 7 11.

[0083] Now, 15 users manually place a virtual measuring device in the visualization of system 5. For this purpose, the user can access the data of different measuring devices 3 stored in storage unit 8.

[0084] Subsequently, the computing unit 6 evaluates the installation position of the measuring device 3 based on the installation criteria stored for the measuring device 3.

[0085] The assessment will be presented in the next step 14 in the visualization of Annex 5.

[0086] Next in Fig. 5 The illustrated embodiment of method 2 supplements the one described in the Fig. 3 und 4 The illustrated embodiments. First, as already explained, the system 5 is detected 10 and displayed on the display unit 7 11. Alternatively or complementarily, a detected measuring device 3 is assigned 12 and / or the user places 15 a virtual measuring device 3 in the visualization of the system 5. Subsequently, the installation position of the detected measuring device 3 or the virtual measuring device 3 is evaluated 13 and the evaluation is displayed 14. According to the illustrated embodiment, an optimal installation position 9 with regard to the criteria to be met is also displayed 16. Alternatively or additionally, the processing unit 6 suggests another measuring device 3, whereby the alternative measuring device 3 is displayed in the visualization 17.

[0087] Fig. 6Figure 18 shows an embodiment of a method 18 for installing a measuring device 3 in a system 5. First, a method 2 is carried out to evaluate the installation position of the measuring device, thereby also determining the optimal installation position of the measuring device 3. In a subsequent step 19, the measuring device 3 is then installed in the system 5 at the optimal installation position. This embodiment has the advantage that the measuring device can be installed under optimal conditions, which significantly improves the functionality of the measuring device. Reference sign

[0088] 1 Augmented reality device 2 Method for evaluating the installation position of a measuring device 3 Measuring device 4 Acquisition unit 5 System 6 Processing unit 7 Display unit 8 Storage unit 9 Optimal installation position 10 Acquisition of the system by the acquisition unit 11 Visual representation of the system on the display unit 12 Assignment of the measuring device 13 Evaluation of the installation position of the measuring device 14 Representation of the evaluation 15 Placement of a virtual measuring device in the visualization of the system 16 Representation of the optimal installation position 17 Representation of an alternative measuring device 18 Method for installing a measuring device in a system 19 Installation of a measuring device in a system

Claims

1. Method (2) for evaluating the installation position of a measuring device (3), in particular a flowmeter or a fill level measuring device, in a system (5) using an augmented reality device (1), wherein the augmented reality device (1) has at least one capturing unit (4) for capturing the system (5), at least one computing unit (6) and at least one display unit (7), wherein the method (2) comprises the following steps: - at least partially capturing (10) the system (5) by the at least one capturing unit (4), - visual representation (11) of the system (5) on the display unit (7) on the basis of the partial capturing (10) of the system (5), - assignment (12) of at least one measuring device (3) installed in the system (5) in an installation position and / or placement (15) of at least one virtual flowmeter or fill level measuring device in an installation position in the visual representation (11) of the system (5), wherein the assignment of the measuring device comprises both the recognition of the type of measuring device, i.e., whether it is a flowmeter or a fill level measuring device, and the recognition of the measuring device type, - evaluation (13) of the installation position of the at least one recognized and / or virtual flowmeter or fill level measuring device by the computing unit (6), wherein installation criteria are used to evaluate (13) the installation position of the at least one detected and / or virtual flowmeter or level measuring device, wherein the installation criteria take into account the relative position of the flowmeter or level measuring device to at least one other component of the system (5) and / or the flow direction of a medium and / or the type of measuring device and / or the installation environment of the flowmeter or level measuring device, wherein the computing unit (6) determines an optimum installation position (9) of the flowmeter or level measuring device in the system (5), taking into account the installation criteria, wherein, in order to determine the optimum installation position (9), the evaluation (13) of several installation positions is compared, and that the installation position with the best, in particular the highest, evaluation is output as the optimum installation position (9) via the display unit (7). - representation (14) of the evaluation on the display unit (7), wherein the optimum installation position (9) is displayed in the visualization of the system (5), and wherein at least one component of the system (5) is changed by the user and / or by the computing unit (6) with regard to its type and / or its position and / or its dimensions and / or its orientation in the visualization of the system (5), i.e. virtually, and / or at least one component of the visualization of the system (5) is added and / or removed from the system (5) virtually, so that, as a result, the system is at least partially modified virtually and the installation position of the flowmeter or level measuring device in the modified system (5) is evaluated and / or the optimum installation position of the flowmeter or level measuring device in the modified system is determined.

2. Method (2) according to claim 1, wherein the augmented reality device (1) comprises at least one AR headset, smart glasses, at least one smart phone or at least one tablet.

3. Method (2) according to claim 1 or 2, wherein the capturing unit (4) forwards image data and / or video data and / or thermal image data and / or stereo data and / or depth camera data to the computing unit (6) and / or to the display unit (7).

4. Method (2) according to any one of claims 1 to 3, wherein the computing unit (6) recognizes the type and / or the size and / or the length and / or the orientation of individual components of the system (5) based on the data transmitted by the capturing unit (4).

5. Method (2) according to any one of claims 1 to 4, wherein the evaluation (13) of the installation position is carried out on a scale, wherein the representation of the evaluation is indicated by a color coding and / or by a numerical value and / or by a further scalable parameter.

6. Method (2) according to any one of claims 1 to 5, wherein the evaluation (13) comprises an overall evaluation, wherein the overall evaluation results from the combination of several individual evaluations, wherein each individual evaluation relates to the evaluation of an individual installation criterion.

7. Method (2) according to claim 6, wherein, in order to determine the optimal installation position (9), the overall evaluation of a plurality of installation positions, preferably of all possible installation positions, is compared, and that the installation position with the best, in particular the highest, evaluation is output via the display unit (7) as the optimal installation position (9).

8. Method (2) according to any one of claims 1 to 7, wherein the augmented reality device (1) has at least one memory unit (8), wherein data from a plurality of flowmeters or fill level measuring devices and / or from a plurality of further components of the system (5) is stored in the memory unit (8), wherein the computing unit (6) determines, in particular, the type of measuring device (3) and / or the type and / or the dimensions of at least one further component on the basis of the stored data.

9. Method (2) according to any one of claims 1 to 8, characterized in that the at least one flowmeter or fill level measuring device is replaced by an alternative measuring device (3) by the user and / or by the computing unit (6) in the visualization of the system (5), and in that the installation position of the alternative flow meter or fill level measuring device in the system (5) is evaluated and / or that the optimal installation position (9) of the alternative flowmeter or fil level measuring device in the system (5) is determined.

10. Augmented reality device (1) with at least one capturing unit (4) for at least partially capturing of the system (5), with at least one computing unit (6) and with at least one display unit (7), wherein the augmented reality device (1) is designed such that, in order to evaluate the installation position of a flowmeter or fill level measuring device in the system (5), it carries out a method (2) according to any one of claims 1 to 9.

11. Method (16) for installing a flowmeter or fill level measuring device in a system (5), wherein, in a first step, a method (2) for evaluating the installation position of a flowmeter or fill level measuring device is carried out according to any one of claims 1 to 9, and wherein, in a second step, the flowmeter or fill level measuring device is installed (19) in the system (5) preferably according to the optimal installation position.