Process for flexible production of an electronic system

Abstract

The invention relates to a method (14) for producing an electronic system (1) having a plurality of components (4, 5) whose installation positions (3) are functionally relevant. In the method (14), any distribution of the components (4, 5) across a plurality of installation positions (3) in the electronic system (1) is permitted. By processing electrical and / or electronic data signals of the various components (4, 5) that are automatically detected after the components (4, 5) have been arranged in the installation positions (3), it is automatically determined which of the components (4, 5) is installed at which of the installation positions (3).

Description

[0001] The present invention relates to a method for producing a multi-part electronic system.

[0002] Electronic components are used today in large numbers and a wide variety of applications. While this can be functionally useful, it also presents challenges, for example in manufacturing, use, and control.

[0003] As an application example, CN 113 188 605 A describes a procedure for a physical experiment using a smartphone.

[0004] DE 10 2016 100 254 A1 describes a device for differentiating data from a plurality of multidimensional magnetic field sensors. The device comprises a first sensor arrangement with a first magnetic field source and a first multidimensional magnetic field sensor, and a second sensor arrangement with a second magnetic field source and a second multidimensional magnetic field sensor. The magnetic field sources and magnetic field sensors are each arranged relative to each other in a characteristic manner.

[0005] DE 10 2013 102 785 A1 describes a collision detection device that can receive sensor data from multiple sensors of at least two different sensor types. Based on the sensor data from each sensor, it is then determined whether a protective device must be activated. Different determination logics can be used depending on the sensor type.

[0006] The object of the present invention is to enable or support a particularly low-effort and robust, i.e. error-free or low-error production and commissioning of at least partially electronic multi-component systems.

[0007] This problem is solved by the subject matter of the independent claims. Further possible embodiments of the invention are disclosed in the dependent claims, the description, and the figures. Features, advantages, and possible embodiments set forth in the description for one of the subject matter of the independent claims are to be regarded, at least analogously, as features, advantages, and possible embodiments of the respective subject matter of the other independent claims, as well as of any possible combination of the subject matter of the independent claims, optionally in conjunction with one or more of the dependent claims.

[0008] The method according to the invention can be applied in the production or manufacturing of an electronic system with several components, the respective installation positions of which within the electronic system are relevant to its function. The components can be, in particular, visually identical, i.e., in their external appearance, or at least similar or easily confused with one another. Functionally, the components can be fundamentally identical or different, depending on the application of the present invention. The fact that the respective installation positions of the components are relevant can mean that, for the intended operation of the electronic system, it must ultimately be known which component is located in which installation position. This information can ultimately be specified or recorded, for example, in a corresponding data storage device, control unit, or the like, or be incorporated into a setting, configuration, or control of the electronic system.

[0009] In the method according to the invention, the electronic system comprises an electronic carrier with several possible mounting positions for components, as well as several electronic components to be arranged on the electronic carrier during the production of the electronic system, i.e., in or at its mounting positions. Such mounting positions can, for example, be or include recesses, sockets, slots, contact points, interfaces, jacks, or the like, as defined in the present invention. Depending on the application, i.e., the type or configuration of the electronic system to be manufactured, the components can be, for example, semiconductor components, microchips, SoCs, sensors, and / or the like.

[0010] According to the invention, any distribution of the components across the multiple installation positions is permitted. In other words, the method or the production of the electronic system does not specify which components are to be arranged in or at which installation positions. Accordingly, the individual components do not need to be specifically marked or selected for a particular installation position. The components can therefore be provided, for example, without any distinguishing design details, markings, or labels. Likewise, the components can be provided in a single stock, provided they are functionally identical.

[0011] In the method according to the invention, after the components are arranged, i.e., installed on the electronic carrier, individual electrical and / or electronic data signals from each of the various components are automatically acquired. For this purpose, the various components can be electronically controlled, for example, to query or read sensor data, measurement data, or the like. These data signals can be acquired, for example, by a corresponding circuit, electronic module, control unit, or the like. This circuit or control unit can also be part of the electronic system and, for example, be integrated into the electronic carrier, arranged on it, or connected to it for signal transmission.

[0012] In the method according to the invention, the acquired data signals are processed—and, if necessary, interpreted—and automatically used to determine which component is installed, i.e., arranged, in or at which of the installation positions. In other words, automatic data- or signal-based identification or recognition of the components arranged at the various installation positions can be carried out. Thus, an automatic assignment can be made between the different components and the various physical installation positions in or at which the components are installed or arranged. For this purpose, the aforementioned control unit can, for example, be configured accordingly. For instance, the control unit can comprise a process unit, such as a microchip, microprocessor, microcontroller, or the like, and a computer-readable data storage device coupled to it.This data storage device can contain a corresponding operating or computer program that can be executed by the process unit. This program can encode or implement a predefined procedure, specifically tailored to the respective application, i.e., the specific electronic system or the components used therein, in order to perform the identification or assignment.

[0013] Since identification and assignment are based on data signals, the components can be connected via a common interface, such as to the control unit, a data bus, or similar. Therefore, neither physical or externally visible markings for the various components nor predefined individual electronic addressing of each installation position are required. The corresponding result of the identification and assignment can then be stored in a data storage device, a processing or control logic of the electronic system, or similar. Thus, the described procedure for identification and assignment...Assignment is therefore only carried out once during production - or possibly after each replacement of several components - and the corresponding identification or assignment can then be permanently known in the subsequent operation of the electronic system, i.e., used for the operation of the electronic system.

[0014] In existing production processes, the use of identical components, or components that are difficult or impossible to distinguish based on their external appearance (such as sensors within a sensor system requiring differentiation between the various components or sensors), can lead to a high degree of product variety, significant control effort, and a considerable susceptibility to errors in the production and assembly process. This is especially true when components with limited spatial separation need to be assembled, as accidental swaps can occur, or additional measures may be necessary to prevent such swaps.For example, conventional components can have installation position-specific geometric, mechanical, and / or color coding features to ensure correct assignment to a specific individual installation position during assembly. Likewise, the corresponding installation positions would then also have to be designed or marked accordingly. The associated manufacturing, logistical, and cost effort can be saved or at least reduced by the present invention. Thus, the present invention can enable particularly simple and efficient manufacturing of complex electronic systems while simultaneously achieving an improved or at least unchanged error rate.

[0015] In one possible embodiment of the present invention, the various components appear externally at least substantially identical. In other words, components that are identical or similar, and in particular easily confused, are used—at least or exclusively—visually, i.e., viewed from the outside. This can represent an application in which the present invention can particularly effectively demonstrate its advantages. In particular, it can enable particularly simple and efficient prefabrication of the various components, as well as correspondingly simple and efficient logistics. For example, at least substantially identical housings and / or connections or interfaces can be used for the various components.

[0016] In another possible embodiment of the present invention, the various components are functionally identical. In other words, components of the same type can be installed or used. An example of an electronic system in which functionally identical components can be used, whose individual installation positions are nevertheless relevant to the overall function of the electronic system, is a stereo camera. Such a stereo camera can have two functionally identical image sensors, but for correct stereo image generation, it is important which of the two image sensors is located on the left and which on the right. In such cases, the present invention eliminates the need to provide different versions of the image sensors, namely a left version and a right version.

[0017] If the components are functionally different, they can be identified and assigned to their installation positions based on general characteristics of the respective data signals, independent of specific sensor detection or similar methods. For example, an optical image sensor might provide data signals with a completely different structure than a rain sensor, an accelerometer, or a non-sensory component. In such cases, identification and assignment can be achieved without using or detecting a predefined reference object.

[0018] In a further possible embodiment of the present invention, the data signals are those generated by the components in response to a predefined control or switching action and / or a predefined environmental change that leads to different effects at the various installation positions or the components located there. Such different effects due to the predefined environmental change can arise, in particular, from the different spatial positions of the various installation positions, for example, relative to the respective environment or environmental change. For example, different perspectives on the environment or environmental change can arise due to the different spatial positions of the installation positions.Environmental changes and / or a non-simultaneous detection of environmental changes, i.e., a position-dependent temporal sequence of detection of the environmental changes, may result. A predefined control or switching measure may, for example, include generating a predetermined signal. Such a signal may then arrive at the various installation positions at different times and / or with different intensities and / or at different angles of incidence, and thus be detected by the components according to their installation positions, for example, in a specific temporal sequence or order, or with different intensities or at different angles, or influence the components in a measurably different way. The embodiment of the present invention proposed here enables the identification or...Assignment can be carried out particularly reliably and robustly. This is the case because, due to the switching action and / or environmental change being known in advance, the corresponding reactions of the various components can be detected particularly easily, accurately, and reliably.

[0019] In a further possible embodiment of the present invention, the data signals are those generated by the components in response to a predefined movement of the electronic system or at least of the electronic carrier with the components arranged on or attached to it. Such a movement can, for example, occur relative to the environment or relative to a predefined reference object. The predefined or predetermined movement here occurs in a direction in which the various components are spaced apart from one another or along a corresponding path.For example, during the processing of the relevant data signals, a temporal sequence or order can be determined in which an external object, structure, pattern, or similar element successively leads to a specific, recognizable influence on the components—for instance, a corresponding detection or state change. This can mean determining the order in which such an object, structure, pattern, or similar element is detected by or influences the components. By coordinating the direction of movement with the relative spatial arrangement of the components or their installation positions, as proposed here, it can be ensured that unambiguous identification or assignment is always possible.Furthermore, the embodiment of the present invention proposed here can enable such identification or assignment particularly easily and with minimal effort, since only the electronic system or the electronic carrier needs to be moved, which is typically moved anyway during production. Such movement can therefore be carried out automatically, for example, by means of a conveyor or transport device for the electronic system or the electronic carrier. Thus, no additional device or control system is required, for example, for a predefined movement or change of a reference object in the environment.

[0020] In a further possible embodiment of the present invention, the data signals of different components are compared with each other and / or with at least one or a respective reference signal data set during the processing of the data signals. Depending on the type of component, a spatial distribution or perspective, or a relative position of one or more detected features or objects in a respective field of view or detection area of ​​the components, or the like, can be determined and used as a criterion or basis for identification or assignment. For example, using the image sensors as an example, a specific detected environmental feature can be identified in the data signals of both image sensors, and it can then be determined whether the environmental feature is located further to the left or further to the right in the respective field of view or detection area.Similarly, for example, the reference signal data set for a specific installation position can be predefined, corresponding to the data signals that would result from a component located at that installation position. By comparison, it can then be determined which data signals best match the reference signal data set. It can then be identified that the corresponding component that provided these data signals is located at the corresponding installation position. One or more of the other components can be assigned based on the degree, extent, or direction of their respective deviation from the reference signal data set of a specific installation position. Likewise, a specific reference signal data set can be predefined for several or all installation positions. The embodiment of the present invention proposed here can enable simple and reliable identification and assignment.

[0021] In another possible embodiment of the present invention, the electronic system is a sensor system. The multiple components are sensors for this sensor system. In other words, the method according to the invention can be applied here to the production of a sensor system with multiple sensors. This can represent a practical and useful application of the present invention. For example, multiple sensors can be used to detect or scan a specific detection area in different ways, and / or multiple sensors can be used to detect a total detection area that is larger than the individual detection areas of the individual sensors. In these cases, the respective function of the electronic or sensor system can be...Sensor systems without a specific or fixed distribution of sensors across the various installation positions can be achieved, provided this distribution is known in the final operation of the electronic system or the system is configured accordingly. This is precisely what the present method ensures.

[0022] In one possible embodiment of the present invention, the various sensors have different detection ranges, particularly due to their different installation positions. These detection ranges of the individual sensors can therefore be, for example, completely disjoint, i.e., they do not overlap, or they can be directly adjacent to or connected to one another, or they can only partially overlap without being completely identical. In the embodiment of the present invention proposed here, a physical reference object is positioned within the detection range of the sensors or several of the sensors and detected by the sensors. Such a reference object can accordingly also be referred to as a sensor target. In particular, the reference object can be arranged at least partially in an overlapping area in which the detection ranges of several or all of the sensors overlap.In the embodiment of the present invention proposed here, corresponding sensor data or sensor signals from the various sensors are acquired as the data signals. Based on this, in combination with predetermined, i.e., known, properties of the reference object and the predetermined, i.e., known, position of the reference object relative to the sensors, it is determined which of the components, i.e., which of the sensors, is installed in or at which of the installation positions.

[0023] The predefined properties of the reference object can include, for example, its design, size, shape, color, surface texture, reflectivity, and so on. This may depend, for instance, on the type of sensors used in the specific application. The approach proposed here is particularly suitable when one or more of the sensors are functionally identical, i.e., of the same type. Using a predefined reference object as proposed here allows for a particularly simple, robust, and reliable assignment of the various sensors to their respective installation positions, since it is known in advance which features of the reference object can be used for this purpose and / or which data signals correspond to which installation position—that is, which data signals are expected from which installation position.By using the reference object, a clear and consistent identification or assignment can be enabled or achieved, regardless of the specific environment.

[0024] In a possible embodiment of the present invention, the reference object is designed asymmetrically in at least one direction along its extent with respect to at least one predetermined or predefined property. The reference object can thus vary in this direction with respect to this property, particularly monotonically. The reference object is then positioned such that this direction is parallel to the direction of the spacing between the multiple sensors in whose detection range the reference object is located. The proposed design and arrangement of the reference object relative to the sensors ensures that the sensors detect the reference object differently depending on their installation position, thus delivering correspondingly different data signals. This allows for unambiguous identification.The at least one property in or with respect to which the reference object varies or is asymmetrically designed can be, for example, the color or color scheme and / or the geometry, i.e., the size and / or shape and / or contour, of the reference object.

[0025] In a possible further development of the present invention, to determine which sensor is installed in or at which mounting position, the sums of the respective measured values ​​of at least two sensors in or along the direction in which the reference object is asymmetrically designed with respect to at least one property are compared. Such measured values ​​can be, for example, measured intensities or brightness values, or the like. Thus, for example, the corresponding measured values ​​of the pixels of the sensors arranged in at least one line extending in the corresponding direction can be summed and these sums compared. Taking into account any resulting variation, i.e., the course of the at least one property of the reference object, a left image sensor and a right image sensor of a stereo camera or the like can then be identified as such.The relevant property of the reference object can be, for example, its color or brightness. For instance, an image can be used as a reference object that has two areas with different colors or brightness levels, arranged consecutively in the relevant direction. If the image sensors measure this image, the corresponding measurement points or values ​​can be used to determine which sensor is located in which installation position. The reference object can be larger than the detection ranges of the individual sensors, particularly in the relevant direction, or extend beyond the overlap of the sensors' detection ranges in that direction. The reference object can be designed and arranged in such a way that a range of variation, in which at least one property or value differs, is defined.whose value changes, at least within the detection range of one of the sensors or, if they are disjoint, between the detection ranges. For example, if the reference object comprises a white and a black area, its boundary may lie in the overlap of the detection ranges of a left and a right sensor. The overlap of the detection ranges may be smaller than the individual detection ranges. Then, for example, the detection range of the left sensor may cover most of the white area and the detection range of the right sensor may cover most of the black area. Thus, the total sum intensities of the left and right sensors differ. The further development proposed here represents a simple and practical method for the identification or...This shows the allocation of the different sensors relative to their different installation positions.

[0026] Further features of the invention may become apparent from the following description of the figures and from the drawings. The features and combinations of features mentioned above in the description, as well as the features and combinations of features shown below in the description of the figures and / or in the figures themselves, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention.

[0027] The drawing shows in: Fig. 1. A partial schematic representation illustrating a method for producing a multi-component electronic system; and Fig. 2. An exemplary schematic flowchart for such a procedure.

[0028] Fig. Figure 1 shows a partial schematic representation of an electronic system 1 comprising several electronic components. The electronic system 1 has an electronic carrier 2, which provides several mounting positions 3. A first sensor 4 is arranged at one of these mounting positions 3 as an electronic component. For illustration, a detection area 4a of the first sensor 4 is indicated. A second sensor 5 is arranged at another mounting position 3 on the electronic carrier 2. The detection area 5a of this second sensor 5 is also indicated. It can be seen that the detection areas 4a and 5a partially overlap, but are not identical.

[0029] Furthermore, the electronic system 1 also includes a control unit 6, which is coupled via an interface 7 to the electronic carrier 2, or to the first sensor 4 and the second sensor 5. The control unit 6 can acquire data signals, such as sensor data from the first sensor 4 and the second sensor 5, via the interface 7. To process these data signals, the control unit 6 has a correspondingly configured data processing unit, which is schematically represented here by a processor 8 and a computer-readable data memory 9 coupled to it.

[0030] Electronic system 1 can, for example, be a stereo camera, where the first sensor 4 can then function as the left image sensor and the second sensor 5 as the right image sensor. To avoid a variety of variants, particularly of sensors 4 and 5, and potentially correspondingly of their mounting positions 3, which would result from measures taken to prevent the left and right image sensors from being swapped during the manufacturing or assembly of electronic system 1, the interchangeability of identical sensors 4 and 5—that is, their arbitrary assignment to mounting positions 3—is permitted during the manufacturing process. Therefore, the first sensor 4 and the second sensor 5 no longer need to be distinguishable from each other; they can be identical.Accordingly, the identification of sensors 4, 5 with regard to their actual final installation positions 3 is no longer ensured here by a correct execution of a predetermined assignment between different sensors to the installation positions 3 within the framework of manufacturing or assembly, as well as a respective interface or connection point, i.e., for example, cables or plugs or boxes or the like.

[0031] Rather, the corresponding identification or assignment is achieved here through a corresponding evaluation, i.e., processing and interpretation of the data signals or sensor data from the first sensor 4 and the second sensor 5, for example, by the control unit 6. For this purpose, the sensor data of sensors 4 and 5 can be checked in a predefined manner, for example, based on predefined calibration targets, in order to identify the positions or sensor characteristics based on the sensor data and thus assign the respective sensor 4 or 5 within its functional chain. It is therefore possible to automatically determine, based on the corresponding data signals, which of the sensors 4 and 5 is located in which of the installation positions 3. This can be done simultaneously with other routines for commissioning, configuring, or verifying the electronic system 1.

[0032] In the example presented here, an external, predefined reference object 10 is used for the corresponding identification and assignment. In the example of the stereo camera, the individual image sensors, which generally have identical properties, must each be assigned to one of the installation positions 3, i.e., identified as the left or right image sensor. This can be achieved here using the reference object 10, which is designed asymmetrically in a predefined manner. For example, the reference object 10 has a first sub-area 11 and a second sub-area 12, which are colored differently. The different sub-areas 11 and 12 are arranged next to each other or one behind the other along a corresponding direction of variation 13. In or along this direction of variation 13, theParallel to this, the installation positions 3 and thus the first sensor 4 and the second sensor 5 are also spaced apart from each other, i.e. arranged next to each other or one behind the other.

[0033] As indicated here by the detection areas 4a and 5a, the reference object 10 is detected by both the first sensor 4 and the second sensor 5. However, the first sensor 4 primarily detects the first sub-area 11, and the second sensor 5 primarily detects the second sub-area 12. This results in different sensor data or data signals from sensors 4 and 5. Therefore, it is possible to determine, based on the corresponding measured values, i.e., the corresponding sensor data or data signals, which of the sensors 4 and 5 is located in or at which installation position 3.

[0034] To further illustrate this, shows Fig.2 An exemplary schematic flowchart 14 for a corresponding procedure. In process step S1, the components for the electronic system 1 are provided. In process step S2, these components are connected to each other during the production or manufacturing of the electronic system 1. Here, the first sensor 4 and the second sensor 5 can be attached to the electronic carrier 2 in their various mounting positions 3. Similarly, the control unit 6 can be installed here and connected to the electronic carrier 2 and / or to the sensors 4 and 5.

[0035] In a process step S3, the specified reference object 10 is positioned in the detection areas 4a, 5a of the sensors 4, 5.

[0036] In process step S4, the reference object 10 is detected using sensors 4 and 5, and corresponding sensor data or data signals from sensors 4 and 5 are acquired, for example, by the control unit 6 for evaluation. To enable or support the evaluation for the identification or assignment of sensors 4 and 5, further measures, particularly automated ones, can be carried out here. For example, the reference object 10 and / or the electronic system 1 can be moved, i.e., a corresponding relative movement can be generated, especially in or along the direction of variation 13.

[0037] In process step S5, the acquired data signals or sensor data are processed in a predefined manner to identify or determine which of the sensors 4, 5 is located at which of the installation positions 3. For example, for each of the sensors 4, 5, respective pixel or intensity values ​​P can be read out along a series of pixels in the direction of variation 13 and summed individually for each of the sensors 4, 5. The resulting sums can then be compared. Since the first sub-area 11 is brighter than the second sub-area 12, pixels corresponding to the second sub-area 12 yield correspondingly larger pixel or intensity values. The following must hold true: ∑iNPleft,i≤∑iNPright,i

[0038] It contains P links,i the intensity or pixel values ​​of the sensor located in the left installation position 3 and P rechts,iThe intensity or pixel values ​​of the sensor located in the right-hand installation position 3. The index i = 1, ..., N counts the pixels of the respective sensor 4, 5 in or along the direction of variation 13.

[0039] In a process step S6, the determined arrangement or assignment of the sensors 4, 5 in or to the installation positions 3 can be stored, i.e., saved, in the control unit 6 or elsewhere, and / or the electronic system 1 can be set or configured accordingly.

[0040] Similarly, other evaluation or assignment conditions can be specified. This can depend, for example, on the type of sensors 4, 5 and / or the design of the reference object 10 and / or whether such an external reference object 10 is used at all. Accordingly, the basic procedure can also be adapted and applied to other sensor domains or other types of components.

[0041] Overall, the examples described show how it is possible to identify or assign sensors with regard to their positions within a multi-sensor system. Reference symbol list 1 Electronic system 2 electronic carriers 3 installation positions 4 first sensor 4a Detection range (of the first sensor) 5 second sensor 5a Detection range (of the second sensor) 6 Control unit 7 Interface 8 processor 9 Data storage 10 Reference object 11 first sub-area 12 second sub-area 13. Direction of variation 14. Schedule S1-S6 process steps QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 113 188 605 A

[0003] DE 10 2016 100 254 A1

[0004] DE 10 2013 102 785 A1

[0005]

Claims

[1] Method (14) for producing an electronic system (1) with several components (4, 5) whose respective installation position (3) is relevant for the function of the electronic system (1), wherein - as parts for the electronic system (1) an electronic carrier (2) with several possible installation positions (3) for components (4, 5) and several corresponding components (4, 5) to be arranged on the electronic carrier (2) are provided, - any distribution of the components (4, 5) across the multiple installation positions (3) is permitted, - after the arrangement of the components (4, 5) on the electronic carrier (2), electrical and / or electronic data signals of each of the different components (4, 5) are automatically detected, - by processing these data signals, it is automatically determined which of the components (4, 5) is installed at which of the installation positions (3). [2] Method (14) according to claim 1, characterized by, that the components (4, 5) look at least essentially identical externally. [3] Method (14) according to any one of the preceding claims, characterized by that the components (4, 5) are functionally identical. [4] Method (14) according to any one of the preceding claims, characterized by , that the data signals are those data signals that are generated by the components (4, 5) in response to a predefined switching action and / or a predefined environmental change that leads to different effects at the various installation positions (3). [5] Method (14) according to any one of the preceding claims, characterized by, that the data signals are those data signals which are generated by the components (4, 5) in response to a predefined movement of at least the electronic carrier (2) with the components (4, 5) arranged on it in a direction in which the components (4, 5) are spaced apart from each other. [6] Method (14) according to any one of the preceding claims, characterized by , that when processing the data signals, the data signals of different components (4, 5) are compared with each other and / or with a predefined reference signal data set. [7] Method (14) according to any one of the preceding claims, characterized by , that the electronic system (1) is a sensor system (1) and the multiple components (4, 5) are sensors (4, 5) for this sensor system (1). [8] Method (14) according to claim 7, characterized by, that the sensors (4, 5) have different detection ranges (4a, 5a), a predefined physical reference object (10) is positioned in the detection range (4a, 5a) of the sensors (4, 5) and is detected by means of the sensors (4, 5), as the data signals corresponding sensor data are acquired and based on this in combination with predefined properties and the predefined position of the reference object (10) relative to the sensors (4, 5) it is determined which of the sensors (4, 5) is installed at which of the installation positions (3). [9] Method (14) according to claim 8, characterized by , that the reference object (10) is designed asymmetrically in at least one direction (13) in at least one property and is positioned such that this direction (13) is parallel to the direction of the distance between the multiple sensors (4, 5). [10] Method (14) according to claim 9, characterized by, that to determine which of the sensors (4, 5) is installed at which of the installation positions (3), the sums of the respective measured values ​​of the sensors (4, 5) along the direction (13) are compared with each other.

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