DE102018207687A1 - Method and computing device for predicting at least one assembly error of a head-up display device for a motor vehicle - Google Patents

Abstract

The invention relates to a method for predicting at least one assembly error of a head-up display device for a motor vehicle. In the method, in a step a), a simulation model (10) is formed using a plurality of measurement data sets (22, 32, 42), each comprising at least one measured value (23, 33, 43) of at least one tolerance-related measured variable of a plurality of individual components (20, 30, 40) characterize the head-up display device. In addition, in a step b), the at least one assembly error is forecast by at least one deviation (14) of the simulation model (10) of the head-up display device from a target model (12) of the head-up display device is determined. Another aspect of the invention relates to a computing device (100) for predicting at least one assembly error of a head-up display device for a motor vehicle.

Description

The invention relates to a method for predicting at least one assembly error of a head-up display device for a motor vehicle. Another aspect of the invention relates to a computing device for predicting at least one assembly error of a head-up display device for a motor vehicle.

Head-up displays (HUDs) in motor vehicles represent complex optical systems for which high accuracy requirements exist. Even the smallest deviations, for example a windshield quality of a windshield from a target windscreen quality or a mounting position of the head-up display from a desired mounting position, can lead to faulty image representations, which are also known as niO images ("non-in-order images"). can be designated. In HUDs with so-called Augmented Reality function ("augmented reality function"), the accuracy requirements are again significantly increased. This can be explained by the fact that in the case of head-up displays with augmented reality function, which can also be referred to as AR head-up displays, a technical requirement can be, for example, the most targeted and accurate superimposition between real Objects and HUDs using the effect, virtual objects (images) to effect.

From the DE 10 2014 008 510 A1 discloses a method for automated installation of a head-up display module in a vehicle. To maintain a tolerance reduced Maßkette respective actual positions of various components are determined, which are required for optimal alignment and positioning of a mirror of the head-up display module to a windshield. In addition to the windscreen, these components also include door hinges and a windshield frame.

The DE 10 2015 016 739 A1 discloses a method for mounting a head-up display in a vehicle, in which the head-up display is connected to a cross member. First, the head-up display is fixed in a predetermined installation position on a windshield of the vehicle and then connected via a tolerance compensation device with the cross member. By means of the tolerance compensation device, a tolerance of a distance between the head-up display and the cross member is compensated.

The DE 1 947 407 A1 describes an apparatus for forming pairs of mating parts. The apparatus is for sorting the parts and uses a computer to sort two sets of parts of different types into different classifications according to one or more critical dimensions. The parts of the two sets are then combined in matching pairs according to their classifications.

Object of the present invention is to provide a method and a computing device of the type mentioned by which assembly errors of a head-up display device for a motor vehicle can be counteracted particularly early.

This object is achieved by a method having the features of patent claim 1 and by a computing device having the features of patent claim 9. Advantageous developments of the present invention are the subject of the dependent claims.

1. a) Bilden eines Simulationsmodells unter Verwendung einer Mehrzahl an Messdatensätzen, welche jeweils wenigstens einen Messwert zumindest einer toleranzbehafteten Messgröße einer Mehrzahl an Einzelkomponenten der Head-up-Display-Vorrichtung charakterisieren;
2. b) Prognostizieren des wenigstens einen Montagefehlers, indem wenigstens eine Abweichung des Simulationsmodells der Head-up-Display-Vorrichtung von einem Soll-Modell der Head-up-Display-Vorrichtung ermittelt wird.

A first aspect of the invention relates to a method for predicting at least one assembly error of a head-up display device for a motor vehicle. The method comprises at least the following steps:

1. a) forming a simulation model using a plurality of measurement data records, each of which characterizes at least one measured value of at least one tolerance-related measured variable of a plurality of individual components of the head-up display device;
2. b) prognosticating the at least one assembly error by determining at least one deviation of the simulation model of the head-up display device from a target model of the head-up display device.

This is advantageous since, by using the measurement data sets in step a), real manufacturing tolerances or real dimensions of the respective individual component or several or all individual components of the head-up display device can be incorporated into the simulation model and taken into account. As a result, the simulation model can be created (designed) as a particularly realistic replica of the head-up display device. The deviation of the simulation model of the head-up display device from the target model can accordingly be determined particularly accurately in step b), so that a correspondingly accurate prognosis of the at least one assembly error is made possible. Thus, the assembly error or multiple assembly errors can be counteracted particularly targeted. The at least one assembly error can thus already be detected or evaluated prior to real assembly of the head-up display device on the basis of the deviation of the simulation model from the target model and avoided during assembly of the head-up display device. Under the at least one Mounting error can be understood as an error of the head-up display device to which it in the assembly of various components to the head-up display device due to impermissible tolerances of the individual components, due to impermissible tolerances of several of the individual components and / or as a result an interaction of the individual components in their assembly can come. The at least one assembly error can be determined from the deviation and in particular from a deviation amount associated with the deviation and additionally or alternatively evaluated. For example, the greater the deviation, the more serious the assembly error can be. The target model can correspond to a model of the head-up display device which can be constructed from tolerance-free individual component models (models of the individual components). In other words, the desired model can be constructed from respective models of the various individual components of the head-up display device, which are not subject to respective tolerances. The target model can thus represent a model of an ideal (tolerance-free) head-up display device. The tolerance-related measured variables can be, for example, respective length dimensions, radii or curvatures, or curvature profiles, to name only a few examples.

The invention is based on the finding that a virtual image generated by a head-up display of the head-up display device mounted on the motor vehicle can indeed be checked and detected whether the virtual image is a niO image, however a cause of error so the reason for the niO image often can only be drawn by a complex search of cause conclusions.

In an advantageous development of the invention, at least one measured data set of the plurality of measured data sets characterizes at least one installed position value of at least one installation position of at least one individual component of the plurality of individual components on the motor vehicle. This is advantageous because the installation position value also allows positional tolerances of the respective individual component to be incorporated into the simulation model. This allows a particularly accurate prognosis of assembly errors.

In a further advantageous development of the invention, a further step c) is carried out to check whether the at least one deviation exceeds a predetermined limit value. As a result, it can be estimated with little effort whether the predicted assembly error, despite the deviation, is within a tolerable range, that is, for example within a predetermined tolerance band.

In a further advantageous embodiment of the invention, the further step d) replacing at least one measurement data set of at least one of the individual components by at least one other measurement data set at least one other, similar individual component and repeating steps a) and b), if in step c) the at least one Deviation exceeds the predetermined limit. This is advantageous since in the simulation model, the measured data record assigned to at least one individual component is replaced by the other measured data set associated with another identical individual component if the deviation exceeds the predetermined limit value, ie if the deviation assumes an inadmissible deviation value. As a result, various combinations of the individual components with regard to the at least one deviation from the desired model can be checked on the basis of the simulation model. This makes it possible on the basis of the simulation model to identify suitable combinations of the individual components and to carry out the assembly of the head-up display device based on these individual components (of the suitable combination). This contributes to the effective prevention of assembly errors in the assembly of the head-up display device on the motor vehicle.

In a further advantageous development of the invention, the further step c) determines the assembly measurement data characterizing the head-up display device by measuring the head-up display device based on the simulation model from the respective individual parts, if in Step c) the at least one deviation falls below the predetermined limit value, and evaluating the assembly measurement data in dependence on the assembly error predicted in step b). This is advantageous since, based on the assembly measurement data, which are tolerance-related, real assembly measurement data, for example, respective positional tolerances of the head-up display device formed from the individual components can be determined. By evaluating the assembly measurement data as a function of the predicted, at least one assembly error, a validation of the simulation model can take place, which can contribute to an improved model quality of the simulation model.

The assembly measurement data can also advantageously include vehicle body components of the motor vehicle, such as a window frame of the motor vehicle and additionally or alternatively at least one door hinge of the motor vehicle characterizing vehicle body measurement data. The vehicle bodywork Measurement data make it possible to increase the model quality of the simulation model to a particular degree.

In a further advantageous development of the invention, a display measurement data set of the plurality of measurement data records characterizes head-up displays, in particular as AR head-up displays, individual components of the plurality of individual components. This is advantageous since measured variables of the head-up display, which can be designed, for example, as an AR head-up display (augmented reality head-up display), have particularly great effects on the at least one assembly error. By considering the display measurement data set in the simulation model, assembly errors can thus be counteracted in a particularly favorable manner.

In a further advantageous embodiment of the invention, a disk measurement data set of the plurality of measurement data records characterizes individual components of the plurality of individual components designed as windshields. This is advantageous since measured variables of the windshield have particularly great effects on the at least one assembly error. By considering the disc measurement data set in the simulation model, assembly errors can thus be counteracted in a particularly favorable manner.

In a further advantageous development of the invention, a carrier measurement data set of the plurality of measurement data records characterizes individual components of the plurality of individual components formed as carrier elements, in particular crossbeams. This is advantageous since measured variables of the carrier element, which may be formed, for example, as a cross member, have particularly great effects on the at least one assembly error. By taking into account the carrier measurement data set in the simulation model, assembly errors can thus be counteracted in a particularly favorable manner.

A second aspect of the invention relates to a computing device for predicting at least one assembly error of a head-up display device for a motor vehicle, which is set up to form a simulation model using a plurality of measurement data records, each comprising at least one measured value of at least one tolerance-related measured variable characterize a plurality of individual components of the head-up display device, and which is adapted to eliminate the at least one assembly error by determining at least one deviation of the simulation model of the head-up display device from a target model of the head-up display device. Predict display device. By the computing device assembly errors of the head-up display device can be counteracted particularly early.

The features presented in connection with the inventive method according to the first aspect of the invention and their advantages apply correspondingly to the inventive calculating device according to the second aspect of the invention and vice versa.

The invention also includes developments of the method according to the invention, which have features as they have already been described in connection with the developments of the motor vehicle according to the invention. For this reason, the corresponding developments of the method according to the invention are not described again here.

In the following, embodiments of the invention are described. For this purpose, the only Fig. Shows a schematic representation of a computing device, which is set up for performing a method for predicting at least one assembly error of a head-up display device for a motor vehicle.

The exemplary embodiments explained below are preferred embodiments of the invention. In the exemplary embodiments, the described components of the embodiments each represent individual features of the invention, which are to be considered independently of one another, which each further develop the invention independently of one another and thus also individually or in a different combination than the one shown as part of the invention. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

In the figure, like reference numerals denote functionally equivalent elements.

The FIGURE shows a schematic representation of a computing device 100 for predicting assembly errors of a head-up display device for a motor vehicle. The computing device 100 is set up respective steps a) to e) a method for predicting the mounting error of the head-up display device perform.

In step a) a simulation model is formed 10 the head-up display device using a plurality of measurement data sets 22 . 32 . 42 , which each have at least one measured value 23 . 33 . 43 at least one tolerance-related measured variable of a plurality of individual components 20 . 30 . 40 characterize the head-up display device.

The single component 20 In the present case, a virtual model of a head-up display, which in the present case is an AR head-up display, represents. Accordingly, a display measurement data set characterizes 22 the majority of measurement records 22 . 32 . 42 the individual component of the plurality of individual components designed as an AR head-up display 20 . 30 . 40 ,

The single component 30 In the present case, it represents a virtual model of a windshield. Accordingly, a slice measurement data set characterizes 32 the majority of measurement data sets 22 . 32 . 42 designed as a windshield individual component of the plurality of individual components 20 . 30 . 40 ,

The single component 40 in the present case represents a virtual model of a carrier element. The carrier element is designed as a cross member, which can also be referred to as a module cross member. Accordingly, a carrier measurement data set characterizes 42 the majority of measurement data sets 22 . 32 . 42 designed as a module cross member individual component of the plurality of individual components 20 . 30 . 40 ,

In step b) there is a forecasting of the at least one assembly error by at least one deviation 14 of the simulation model 10 the head-up display device of a target model 12 the head-up display device is detected.

In step c) a check is made to see if the at least one deviation 14 exceeds a predetermined limit.

In step d) In the present case, a replacement of the measurement data sets takes place 22 . 32 of the individual components 20 . 30 by respective, different measurement data sets 26 . 36 another, similar single component and repeating the steps a) and b) when in step c) the deviation 14 exceeds the predetermined limit. Exceeding the predetermined limit by the deviation 14 In the present case, this is an indication that the combination of the measurement data records 22 . 32 . 42 a corresponding combination of the individual components 20 . 30 . 40 corresponds, in which an insufficient installation quality is expected.

The other measurement record 26 is assigned here to a different AR head-up display, as the measurement data set 22 , In other words, the respective measurement data sets 22 . 26 Although in each case similar AR head-up displays (as respective individual components 20 ), but the measurement data sets differ 22 . 26 For example, due to different, production-related or production-related tolerances of the similar AR head-up displays. The other measurement record 36 is assigned here to a different windshield, as the measurement data set 32 , In other words, the respective measurement records are 32 . 36 Although each similar windshields (as respective individual components 30 ), but the measurement data sets differ 32 . 36 also due to different, production-related or production-related tolerances of similar windshields. By replacing the measurement records 22 . 32 through the other measurement records 26 . 36 can be a different combination of individual components 20 . 30 . 40 be simulated. Similarly, in addition or alternatively, a replacement of the measurement data set 42 through another measurement data set 46 done if the deviation 14 exceeds the predetermined limit. After replacing, the steps become a) to d) with one or more other measurement data sets 26 . 36 . 46 repeatedly and thereby verifies that the deviation 14 is now smaller than in the (previous) use of the (original) measurement data records 22 . 32 . 42 in the simulation model 10 , Unless the deviation 14 is within a permissible range, ie does not exceed or falls below the predetermined limit, the head-up display device with the respective combination, suitable combination of individual components 20 . 30 . 40 mounted, so be built real on the vehicle.

In step e) a determination is made of assembly measurement data characterizing the head-up display device 60 by measuring the, based on the simulation model 10 built from the respective items head-up display device when in step c) the at least one deviation 14 falls below the predetermined limit. In addition, an evaluation of the assembly measurement data takes place 60 depending on the step b) predicted assembly errors.

The measurement records 22 . 32 . 42 characterize respective mounting position values 24 . 34 . 44 respective installation positions of the respective individual components of the plurality of individual components 20 . 30 . 40 on the motor vehicle.

Overall, the examples show how mounting faults can be predicted with particularly little effort by the invention, whereby a complex cause search can be omitted if a niO image is generated by the mounted on the motor vehicle head-up display device. For example, consuming, the production costs and assembly costs significantly increasing Analyzes are omitted. These analyzes include, for example, measuring a respective component layer of the individual component 20 (AR head-up display) to a section of the individual component 30 (Windshield, which can also be referred to as windshield). Furthermore, a disc replacement of the windshield (Einzelkomponente 30 ) can be avoided as a result of any incorrect assignment of errors. Furthermore, a demand of measurement reports concerning a quality of the respective individual components 20 . 30 . 40 as well as a demand for measurement reports concerning the quality of a cockpit of the motor vehicle, for example from suppliers. As a result, a total of test stands for testing the head-up display device at one end of the assembly of the motor vehicle as well as investment costs and production times can be saved. Through the simulation model 10 errors can be predicted or analyzed with little effort, with a process monitoring can already be done before mounting the head-up display device. The procedure provides an on-line measure tracker that enables easy process monitoring and process coordination as well as easy traceability of any assembly-related errors (assembly errors).

The method also makes it possible to evaluate a position of a so-called eye box of the AR head-up display (individual component 20 ), as well as the rating of a (virtual) image generated by the AR head-up display.

In summary, the present invention enables process monitoring and prediction calculation to ensure the functionality of the AR head-up display (single component 20 ) comprehensive head-up display device in the assembly of the motor vehicle by virtual simulation using the simulation model 10 , where the available online datasets 22 . 26 . 32 . 36 . 42 . 46 all system-relevant individual components 20 . 30 . 40 and body interfaces can be used.

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 102014008510 A1 [0003]
• DE 102015016739 A1 [0004]
• DE 1947407 A1 [0005]

Claims (9)

A method for predicting at least one assembly error of a head-up display device for a motor vehicle, comprising at least the following steps: a) forming a simulation model (10) using a plurality of measurement data sets (22, 32, 42), each having at least one measured value (23, 33, 43) of at least one tolerance-sensitive measured variable of a plurality of individual components (20, 30, 40) of Characterize head-up display device; b) prognosticating the at least one assembly error by determining at least one deviation (14) of the simulation model (10) of the head-up display device from a target model (12) of the head-up display device. Method according to Claim 1 , characterized in that at least one measurement data set (22, 32, 42) of the plurality of measurement data sets (22, 32, 42) has at least one mounting position value (24, 34, 44) of at least one installation position of at least one individual component of the plurality of individual components (20, 30 , 40) on the motor vehicle. Method according to Claim 1 or 2 , characterized by the further step: c) checking whether the at least one deviation (14) exceeds a predetermined limit value. Method according to Claim 3 characterized by the further step of: d) replacing at least one measurement data set (22, 32) by at least one other measurement data set (26, 36) of at least one other, identical individual component and repeating steps a ) and b), if in step c) the at least one deviation (14) exceeds the predetermined limit value. Method according to Claim 4 characterized by the further step of: e) determining assembly measurement data (60) characterizing the head-up display device by measuring the head-up display device based on the simulation model (10) from the respective individual parts, if, in step c), the at least one deviation (14) falls below the predetermined limit value, and evaluating the assembly measurement data (60) as a function of the assembly error predicted in step b). Method according to one of the preceding claims, characterized in that a display measurement data set (22) of the plurality of measurement data sets (22, 32, 42) as head-up displays, in particular as AR head-up displays, formed individual components of the plurality characterized by individual components (20, 30, 40). Method according to one of the preceding claims, characterized in that a disc measurement data set (32) of the plurality of measurement data sets (22, 32, 42) designed as windshield individual components of the plurality of individual components (20, 30, 40) characterizes. Method according to one of the preceding claims, characterized in that a carrier measurement data set (42) of the plurality of measurement data records (22, 32, 42) as carrier elements, in particular cross member, formed individual components of the plurality of individual components (20, 30, 40) characterized. Computing device (100) for predicting at least one assembly error of a head-up display device for a motor vehicle, which is set up to form a simulation model (10) using a plurality of measurement data sets (22, 32, 42), which in each case at least characterize a measured value (23, 33, 43) of at least one tolerance-related measured variable of a plurality of individual components (20, 30, 40) of the head-up display device, and which is adapted to detect the at least one assembly error by determining at least one deviation (14) of the simulation model (10) of the head-up display device of a target model (12) of the head-up display device to predict.

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