Inspection device and procedure for a head-up display for a vehicle

Abstract

Inspection device (100) of a head-up display (HUD) for a vehicle (1), wherein images are projected onto a windshield of the vehicle (1) by a HUD unit (3) in the vehicle (1), wherein the quality of the images is automatically inspected and the image on the windshield is corrected by controlling the operation of the HUD unit (3), wherein the inspection device comprises: a frame (10) which transports the vehicle (1) in a reverse and forward direction; a movement unit (30) which is coupled to the frame (10) and which is divided into front and rear and left and right directions of the vehicle (1) moved back and forth; a multi-axis robot (60) which is attached to the motion unit (30) via a lift link (40), which is configured to move up and down, and which is moved into and out of the vehicle (1); a vision camera (70) mounted on an arm (61) of the multi-axis robot (60), which captures the images projected onto the windshield as vision data; and a control element (90) which inspects whether the HUD unit (3) is working normally and controls the operation of the HUD unit (3) by analyzing the visual data captured by the visual camera (70), wherein a roll-up screen (85) which moves towards a front side of the vehicle (1) and blocks the front side of the vehicle (1) is arranged above the frame (10).

Description

BACKGROUND(a) Technical area

[0001] An exemplary embodiment of the present disclosure relates to an inspection device for a head-up display or for a vehicle. More specifically, the present disclosure relates to an inspection device and a method for a head-up display which inspects and corrects the operation of a head-up display for a vehicle in a vehicle inspection line. (b) Description of the state of the art

[0002] Recently, vehicles have been equipped with a DAS (Driver Assistance System) to provide the driver with convenience and safety while driving. The DAS keeps the vehicle in its lane, issues a warning if it drifts out of its lane, maintains a safe distance from neighboring vehicles, prevents collisions with nearby obstacles, and adjusts the speed according to traffic conditions or road environments, using various cameras and radar sensors, etc., without requiring any instruction from the driver.

[0003] DAS systems were previously only found in expensive cars, but recently they have become increasingly common in mid-size and smaller vehicles, with a growing focus on environmentally friendly and economical driving to protect the environment and conserve energy. For example, a DAS can incorporate SCC (Smart Cruise Control), LDWS (Lane Departure Warning System), BSD (Blind Spot Detection), AVM (Around View Monitoring System), and HUD (Head-Up Display). In these systems, the HUD unit projects various driving information, such as vehicle information or navigation instructions, onto the windshield within the driver's primary field of vision while the vehicle is in motion.The HUD unit can display various information elements on the windshield of a vehicle by reflecting and magnifying the images using a projector and an optical unit.

[0004] A system for the automatic calibration of at least one projection, in particular a head-up display, onto a projection surface in a means of transport, in particular in a motor vehicle, is already known from DE 10 2005 037 797 A1. This system comprises at least one projection device for generating at least one calibration pattern on the projection surface, at least one camera device for recording the at least one calibration pattern on the projection surface, a control unit for controlling the at least one projection device and / or the at least one camera device, a means for automatically calibrating the projection, and at least one positioning means for the at least one camera device that can be controlled by the control unit.wherein the control unit, depending on the signals of the at least one calibration pattern detected by the at least one camera device, controls the means for automatic calibration adjustment in such a way that a predetermined objective function, in particular the absence of distortion, of the projection is fulfilled.

[0005] DE 10 2006 006 246 A1 discloses a system and a method for the fully automatic final inspection of components, in particular their actuable functional units, using a robot, comprising a test device (8) for carrying out the final inspection, comprising the steps: automatically aligning the robot and / or the test device to the component to be inspected and / or its functional unit based on orientation data, reproducibly carrying out individual inspections using the test device, wherein the steps of automatic alignment and reproducible execution are repeated until a termination criterion is met and / or the final inspection is completely carried out.

[0006] US Patent 5,612,905 A describes a three-dimensional measurement method and device intended for the rapid and accurate measurement of large objects such as vehicles. The method comprises the steps of determining approximate measurement positions of a shape sensor, positioning the sensor at successive approximate measurement positions to read the shape of surface portions of the object, represented by points on the object whose coordinates are expressed in a fixed axis system relative to the sensor, identifying precise positions of the sensor at the approximate measurement positions relative to a predetermined fixed axis system, and converting the coordinates of the points of the surface portions, expressed in the fixed axis system relative to the sensor, into coordinates expressed in the fixed axis system, based on the identified precise positions of the sensor.

[0007] EP 1 173 743 B1 discloses a dynamic testing device for vehicles with a support frame, wherein the dimensions of the support frame in the direction of a transverse axis of the vehicle are smaller than its wheelbase, and a controllable adjustment device for the support frame, comprising first means which move the support frame up against the vehicle from below, bring the vehicle into a raised test position and lower it again after completion of a test, second means which act on the support frame in such a way that the vehicle in a raised test position is briefly positioned in at least one position deviating from the horizontal position, and third means which act on the support frame in such a way that the vehicle in a raised test position is briefly rotated about a vertical axis.

[0008] Finally, DE 103 04 019 A1 discloses a method for monitoring moving parts of a machine, in which at least two different measured quantities are recorded and at least one of these measured quantities is processed to a first measurement result in such a way that it is comparable with another measured quantity or a second measurement result obtained on the basis of the same, that the first measurement result is compared with another measured quantity or a measurement result obtained on the basis of the same, and that a signal characterizing the comparison result is provided.

[0009] The HUD unit is typically inspected on a vehicle inspection or verification line. This inspection process determines whether distorted images are displayed due to, for example, variations in the film used to counteract double reflection in the windshield glass, the quality of the HUD system, and / or variations in the vehicle's position when the images are projected onto the windshield. The inspection can be performed through a series of preparatory processes, including moving the glass down or backward, connecting a communication interface, installing a protective shield, operating a test interface, inputting the test interface, and similar actions. A post-inspection process is also performed in reverse order of the preparatory process.However, since the HUD inspection process is usually carried out manually by workers, the inspection cycle time increases, work effectiveness decreases, and there is difficulty in using the inspectors and controlling the quality.

[0010] The description of the prior art is provided to aid in understanding the background of the present disclosure and may include reasons that are known to those skilled in the art. The information disclosed above in this background section serves only to enhance understanding of the background of the disclosure and may therefore include information that does not constitute prior art already known to a person skilled in the art in this country. OVERVIEW

[0011] The purpose of the present disclosure is to provide an inspection device and a method for a head-up display or a field-of-view display for a vehicle, which have the advantages of being able to automatically inspect the image quality of a HUD unit and to correct the images which are disturbed by poor operation of the HUD unit.

[0012] The problem is solved by an inspection device having the features of claim 1 and an inspection method having the features of claim 13. Advantageous further developments are found in the dependent claims.

[0013] An exemplary embodiment of the present disclosure provides an inspection device for a head-up display (HUD) for a vehicle, wherein images are projected onto a windshield of the vehicle by a HUD unit in the vehicle, the quality of the images is automatically inspected and the image on the windshield is corrected by controlling the operation of the HUD unit, and which may include: i) a frame into which the vehicle is moved in and out, ii) a motion unit which moves back and forth between the front and rear and left and right directions of the vehicle over the frame, iii) a multi-axis robot which is mounted on the motion unit, which is configured to move up and down, and which is moved in and out of the vehicle, iv) a vision camera which is attached to an arm of the multi-axis robot and which digitally captures images.which are projected onto the windscreen as visibility data, and v) a control element which inspects whether the HUD unit is working normally and controls the operation of the HUD unit by analyzing the visibility data which are captured by the view chamber, wherein a rolling screen which moves towards a front side of a vehicle and blocks the front side of the vehicle is arranged above the frame.

[0014] The inspection device of a head-up display for a vehicle, according to an exemplary embodiment of the present disclosure, can further include an alignment unit arranged at a base of the frame, which aligns the vehicle into a predetermined position. The lift element can include a telescopic cylinder connected to the multi-axis robot and mounted vertically on the motion unit. The telescopic cylinder can include a connecting clamp attached to the motion unit, a plurality of actuator tubes mounted on the connecting clamp and operated by hydraulic pressure via a mounting clamp in a multi-stage forward and reverse motion, and a coupling clamp connected between the actuator tubes and combined with the multi-axis robot.The mounting clamp and coupling chamber can be connected via a safety rod. The motion unit can include a first motion element that slides forwards and backwards along the frame, and a second motion element attached to the first, which slides left and right and carries the lift element. A detection unit that detects obstacles around the camera can be mounted on the multi-axis robot. The camera and the detection unit can be mounted on the arm of the multi-axis robot via a sensor clamp. The sensor clamp can be rotated 360 degrees on the arm of the multi-axis robot by a rotary motor. The detection unit can include an ultrasonic wave sensor. A reference pattern for correcting a measurement point of the camera and for inspecting and correcting the image can be projected onto the screen.

[0015] Another exemplary embodiment of the present disclosure provides an inspection method for a head-up display for a vehicle, which uses the inspection device of a head-up display for a vehicle, wherein images are projected onto a windshield of the vehicle by a HUD unit in the vehicle, wherein the quality of the images is automatically inspected and the image on the windshield is corrected by controlling the operation of the HUD unit.The procedure may include: (a) connecting a communication interface when the vehicle is being transported on a frame, wherein, when the vehicle is transported on the frame, the communication interface is connected to the vehicle, the vehicle is aligned at a predetermined position, and the vehicle's windows are lowered; (b) lowering a multi-axis robot to the vehicle using a lift element and capturing an image projected onto the windshield by a vision camera on the multi-axis robot as vision data; (c) inspecting whether the HUD unit is operating normally by analyzing the vision data captured by the vision camera; and (d) controlling the operation of the HUD and correcting the image if it is determined that the image on the windshield is distorted.

[0016] In the inspection procedure of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure, in process (b) obstacles around the camera can be detected by a detection unit, and the scanning signals can be output to a control element. The operation of the lift element can be stopped in response to a scanning signal from the detection unit. The operation of the multi-axis robot can be stopped in response to a scanning signal from the detection unit. In process (a), when the vehicle is being transported on the frame, a roll-up screen can be unrolled downwards and block the front of the vehicle. In process (b), the measuring point of a camera can be corrected based on a reference pattern on the roll-up screen.In process (c), the center of an inspection pattern can be inspected based on the reference pattern by transmitting the inspection pattern to the reference pattern. In process (d), the operation of the HUD unit can be controlled, and the distorted image can be corrected based on the result of comparing the reference pattern with the inspection pattern.

[0017] According to an exemplary embodiment of the present disclosure, since it is possible to automatically inspect whether the HUD unit is functioning normally, including checking whether the projected images on the vehicle's windshield are distorted, and to automatically correct any distorted images, it is possible to shorten the cycle time for inspecting the HUD unit and improve the efficiency of the inspection process. Furthermore, since the inspection and correction of the HUD unit are performed automatically, it is possible to efficiently manage inspectors and their quality, and to inspect and correct HUD units in different types of vehicles. In addition, it is possible to actively manage flexible production of multiple vehicle types and to reduce the additional manpower and investment costs for reconstructing and manufacturing new correction / inspection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are provided for reference to describing the exemplary embodiments of the present disclosure, and the spirit of the present disclosure should not be interpreted solely by reference to the accompanying drawings. Fig. 1 and Fig. Figure 2 are block drawings showing the configuration of an inspection device for a head-up display for a vehicle according to an exemplary embodiment of the present disclosure. Fig. Figure 3 is a view showing a motion unit in the inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure. Fig. Figure 4 is a perspective view showing a lift element in the inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure. Fig. Figure 5 is a view showing a multi-axis robot in the inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure. Fig. Figure 6 is a view which schematically shows a roll-up screen in the inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure. Fig. Figure 7 is a flowchart showing an inspection procedure for a head-up display for a vehicle according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0019] The present disclosure is described in more detail below with reference to the accompanying drawings, in which embodiments of the disclosure are shown. As those skilled in the art will realize, the described embodiments can be modified in various different ways without all of them deviating from the spirit or scope of the present disclosure. Furthermore, the dimensions and thicknesses of the configurations shown in the drawings are selectively provided for ease of description, so that the present disclosure is not limited to those shown in the drawings, and the thicknesses are shown enlarged to clearly illustrate certain parts and areas. The designation of the components as first, second, etc., is used to distinguish them.The following description serves to distinguish these components for the same relationship, and the components are not limited to the order in the following description.

[0020] Throughout the specification, unless explicitly stated otherwise, the word "indicates" and variations thereof, such as "he, she, it indicates" or "indicates," are to be understood as including the listed elements but not excluding any other elements. Furthermore, the terms "...unit," "...mechanism," "...sub-area," "...member," etc., used here, mean that the unit includes the components that perform at least one or more operations.

[0021] It is understood that the term "vehicle" or "vehicle-like" or any other similar term as used here is inclusive of motor vehicles in general, such as passenger cars, including sports vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft, including a variety of boats and ships, aircraft and the like, and including hybrid vehicles, electric vehicles, internal combustion engine vehicles, electrically connectable hybrid vehicles, hydrogen-powered vehicles and other vehicles with alternative fuels (e.g., fuels derived from resources other than oil). As defined here, a hybrid vehicle is a vehicle that has two or more power sources, for example, both gasoline-powered and electric-powered vehicles.

[0022] Additionally, it is assumed that the following procedures can be executed by at least one control element. The term "control element" refers to a hardware device that includes memory and a processor. The memory is configured to store program instructions, and the processor is configured to execute the program instructions to carry out one or more processes, which are described below.

[0023] Furthermore, the control element of the present disclosure can be embodied as a non-transitory, computer-readable medium on a computer-readable medium containing executable program instructions that are executed by a processor, a control element, or the like. Examples of computer-readable media include, but are not limited to, ROM, RAM, compact disc (CD)-ROMs, magnetic tapes, floppy disks, flash drives, smart cards, and optical data storage devices. The computer-readable recording medium can also be distributed in a network coupled to computer systems, such that the computer-readable media are stored and executed in a distributed manner, e.g., by a telematics server or a controller area network (CAN).

[0024] Fig. 1 and Fig. Figure 2 are block drawings which schematically show the configuration of an inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure.

[0025] With reference to Fig. 1 and Fig. 2 An inspection device 100 of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure can be installed in a vehicle inspection line to inspect and correct the head-up display (hereinafter referred to as "HUD") unit 3, which is attached to a completed vehicle 1 in a vehicle assembly process.

[0026] The HUD unit 3 displays various elements of information for driving vehicle 1, such as vehicle 1 driving information or navigation information, on the windshield within the driver's primary field of vision while vehicle 1 is in motion. The HUD unit 3 essentially comprises a projector that projects an image beam and an optical unit that reflects and magnifies the image beam onto the windshield of vehicle 1.

[0027] The configuration and operation of HUD Unit 3 are well known in the professional community, and a detailed description is not provided here.

[0028] The HUD unit 3 may project distorted images due to variations in the film used for double reflection in the windshield glass, the quality of the HUD system, and variations in the vehicle's arrangement when the images are projected onto the windshield.

[0029] Accordingly, in an exemplary embodiment of the present disclosure, it is necessary to inspect whether the HUD unit 3 is operating normally, for example, whether the projected images are disturbed by the influences described above, and if a projected image is disturbed, it is necessary to correct the image on the windscreen by controlling the operation of the HUD unit 3, such as outputting, reflecting, and magnifying the images.

[0030] That is, the inspection device 100 of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure can automatically inspect the quality of the images produced by the HUD unit 3 and correct images that are disturbed by poor operation of the HUD unit 3.

[0031] Up to this point, the inspection device 100 of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure basically includes an alignment unit 20, a movement unit 30, a lift element 40, a multi-axis robot 60, a vision camera 70, a detection or capture unit 80 and a control element 90.

[0032] In technical circles, the feed direction of a vehicle body is called a "T-direction," the width direction of a vehicle body is called an "L-direction," and the height direction of a body is called an "H-direction." However, in an exemplary embodiment of the present disclosure, the directions are not based on the L-, T-, and H-directions, but are defined as the front-back direction, the left-right direction, and the up-down direction of a vehicle.

[0033] Various assembly elements, which are to be described below, are attached to a frame 10, which includes accessories such as a clamp, a plate, a housing box, a block and a collar for supporting the assembly elements.

[0034] Since the accessories are provided for supporting various assembly elements on the frame 10, the accessories are generally referred to as the frame 10 in the exemplary embodiment of the present disclosure, except in exceptional cases.

[0035] The frame 10 provides a base 11, which is level with the ground on the inspection side and onto which the vehicle can be moved in and out. A column frame 30 is arranged at each corner of the base 11, and the vehicle 1 can move in and out between the column frames 13 on the base 11.

[0036] An uppermost frame 15 is formed in the form of a grid and connects the upper parts of the column frames 13, which are arranged above the frame 10.

[0037] In an exemplary embodiment of the present disclosure, the alignment unit 20, which is a part for aligning different types of vehicles 1 at a predetermined position, is arranged on the base 11 of the frame 10.

[0038] This means that the alignment unit 20 is provided for aligning the vehicle 1 in the front-back direction and the left-right direction depending on the different types of wheel base elements in order to accurately inspect and correct the HUD unit 3.

[0039] The alignment unit 20 can, for example, include a front wheel stop link and a rear wheel support link (not shown) for aligning the vehicle 1 in the front-back direction and a front wheel rim and a rear wheel rim (not shown) for aligning the vehicle 1 in the left-right direction.

[0040] The rear wheel support link and the front wheel stop link each support the rear wheels and the front wheels of the vehicle 1 and may include free rollers which are intended for the forward-backward directional position of the vehicle 1.

[0041] The front wheel rim and the rear wheel rim each align the front wheels and the rear wheels of vehicle 1 in both directions (in the left and the right direction), and they can, for example, align the front wheels and the rear wheels of vehicle 1 in the left-right direction by moving them in the left-right direction using actuating cylinders.

[0042] Fig. Figure 3 is a view showing a motion unit in the inspection device of a head-up display of a vehicle according to an exemplary embodiment of the present disclosure.

[0043] With reference to Fig. 1, Fig. 2 to Fig. 3 A motion unit 30 according to an exemplary embodiment of the present disclosure is provided for moving the multi-axis robot 60, which is described in detail below, back and forth and left / right with reference to the vehicle 1.

[0044] The motion unit 30 is installed on the upper frame 15 and comprises a first motion element 31 and a second motion element 32. The first motion element 31 is attached to the upper frame 15 and can be moved forwards / backwards by means of a guide mechanism or a sliding mechanism. The second motion element 32 is attached to the first motion element 31 and can be moved left / right by means of a guide mechanism or a sliding mechanism. In this configuration, the lift element 40, which will be described in detail below, can be attached to the second motion element 32.

[0045] The first moving element 31 can be moved back and forth, forwards and backwards, with respect to the upper frame 15 by a first servomotor 35 and a first threaded spindle 36. The first servomotor 35 is attached to the upper frame 15. The first threaded spindle 36 is arranged in the front-to-back direction of the upper frame 15 and is connected to the drive shaft of the first servomotor 35 and can essentially rotate on the upper frame 15. The first threaded spindle 36 engages with a special block, which is attached to the first moving element 31.

[0046] The second motion element 32 can move back and forth left / right relative to the first motion element 31 by means of a second servomotor 37 and a second threaded spindle 38. The second servomotor 37 is attached to the first motion element 31. The second threaded spindle 38 is arranged in the left-right direction of the first motion element 31 and is connected to the drive shaft of the second servomotor 37 and can essentially rotate on the first motion element 31. The second threaded spindle 38 engages with a special block which is attached to the second motion element 32.

[0047] With reference to Fig. 1 and Fig. 2 In an exemplary embodiment of the present disclosure, the lift element 40 is provided for moving the multi-axis robot 60, which is described in detail below, upwards / downwards with respect to the motion unit 30. The lift element 40 is connected to the second motion element 32 of the motion unit 30 and can be connected to the multi-axis robot 60. The lift element 40 is vertically attached to the second motion element 32 of the motion unit 30 and includes a telescopic cylinder 41, which is connected to the multi-axis robot 60.

[0048] The telescopic cylinder 41, which is also called a “telescopic support element” or a “telescopic column”, can be implemented in a type of telescope with an actuator that can extend and retract in a multi-stage manner.

[0049] Fig. Figure 4 is a perspective view showing a lift element in the inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure.

[0050] With reference to Fig. 2 and Fig. 4 The telescopic cylinder 41, according to an exemplary embodiment of the present disclosure, includes a connecting holder 51, which is connected to the second moving element 32 of the movement unit 30, and a plurality of actuator tubes 53 on the connecting holder 51.

[0051] The actuator tubes 53 are cylindrical telescopic tubes that can extend and retract in multiple stages by vertical movement using hydraulic pressure or compressed air. The actuator tubes 53 are connected to the connecting brackets 51 via a mounting bracket 55.

[0052] A coupling holder 57 for coupling the multi-axis robot 60, which is described in detail below, is connected to the actuator end of the actuator tube 53, i.e. to the lower end of the actuator tube 53 in the figures.

[0053] Furthermore, the mounting bracket 55 of the telescopic cylinder 41 and the coupling bracket 57 can be connected via a safety rod 56. The safety rod 56 guides the actuator tube 53, which expands and contracts, and prevents the actuator bracket 53 from falling out of the mounting bracket 55.

[0054] Both ends of the safety rod 56 are connected to the mounting bracket 55 and the coupling bracket 57 respectively, i.e. one end (the upper end in the figures) is fixed to the mounting bracket 55, and the other end (lower end in the figures) is arranged vertically above the coupling bracket 57.

[0055] In this configuration, the other end of the safety rod 56 can be coupled in such a way that it is not separated from the coupling holder 57 by an anti-separation element, such as a groove, and can be supported by the coupling holder 57 via a support element, such as a ball bearing.

[0056] With reference to Fig. 1 and Fig. 2. According to an exemplary embodiment of the present disclosure, the multi-axis robot 60 can be moved vertically by the lift member 40, which is described above, and can be moved into / out of the vehicle via the windows of the vehicle 1.

[0057] The multi-axis robot 60, which is a robot with 6 axes, is a very well-known robot system, which is controlled by the control element 90 and can move and rotate the joints in several directions.

[0058] Fig. Figure 5 is a view showing a multi-axis robot in the inspection device of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure.

[0059] With reference to Fig. 2 and Fig. According to an exemplary embodiment of the present disclosure, the multi-axis robot 60 has an arm 61 which is moved in the multi-axis directions via a programmed control system. The multi-axis robot 60 can be coupled to the coupling holder 57 of the telescopic cylinder 41.

[0060] In an exemplary embodiment of the present disclosure, the viewing camera 70, as shown in Fig. 1 and Fig. Figure 2 shows the view of the images projected onto the inside of the windshield by the HUD unit 3 and outputs the visibility data of the control element 90.

[0061] The 70 vision camera is also known in the industry as a vision sensor, and it is, as described in Fig. Figure 4 shows the camera 70 mounted on the arm 61 of the multi-axis robot 60. The camera 70 is attached to the multi-axis robot 60 via a sensor holder 71.

[0062] The 70 vision camera is a vision system that is well-known in the professional world, so the configuration will not be described in detail here.

[0063] The sensor holder 71 is attached to the free end of the arm 61 of the multi-axis robot 60 and can be rotated by a rotary motor 73, such as a servo motor, which is well-known in the field. This means that the camera 70 can be freely rotated 360 degrees at the free end of the arm 61 of the multi-axis robot 60 by the rotary motor 73.

[0064] In an exemplary embodiment of the present disclosure, the detection unit 80 detects obstacles around the view camera 70, i.e., a worker and the windows of the vehicle 1, and outputs the detected signal to the control element 90, as described in Fig. 1 and Fig. 2 is shown.

[0065] As in Fig. As shown in Figure 5, the detection unit 80 is attached to the sensor holder 71, which is described above, together with the viewing camera 70. Since the detection unit 80 is attached to the sensor holder 71 in a manner similar to the viewing camera 70, it can be freely rotated 360 degrees at the free end of the multi-axis robot 60 by the rotary motor 73.

[0066] The detection unit 80 includes, for example, an ultrasonic wave sensor 81, which detects the presence of an obstacle by emitting ultrasonic wave signals and receiving the ultrasonic wave signals reflected by obstacles. The ultrasonic wave sensor 81 is a well-known ultrasonic wave detection unit, so its configuration will not be described in detail here.

[0067] With reference to Fig. 1 and Fig. 2 The inspection device 100 of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure includes a roll-up screen 85 to separate the vehicle 1 in which the inspection and correction of the HUD unit 3 has been completed and a vehicle 1 in which the HUD unit 3 is to be inspected on the inspection working side.

[0068] This means that the vehicle in which the inspection and correction of HUD unit 3 has been completed is ready for the next process, and if, with HUD unit 3 of vehicle 1 behind it, the vehicle in front is being inspected and corrected, the vision camera 70 may make a vision detection error due to the light from the taillights of the previous vehicle.

[0069] Accordingly, in an exemplary embodiment of the present disclosure, it is possible to block the light emanating from the rear lights of the front vehicle towards the front vehicle by installing the roll-up screen between the previous vehicle and the following vehicle.

[0070] Fig. Figure 6 is a view which schematically shows a roll-up screen in the inspection device of the head-up display for a vehicle according to an exemplary embodiment of the present disclosure.

[0071] With reference to Fig. 2 and Fig. In an exemplary embodiment of the present disclosure, the rolling screen 85 is attached to the uppermost frame 15 and can block the front vehicle by rolling downwards in front of the rear vehicle. The rolling screen 85 is rolled around a pivot shaft 86, which is rotatably mounted on the upper frame 15, and can be unrolled downwards by rotating the pivot shaft 86.

[0072] This means that when the rotating shaft 86 turns in one direction, the roller screen 85 can be unrolled downwards from the rotating shaft 86, and when the rotating shaft 86 turns in another direction, the roller screen 85 can be rolled up around the rotating shaft 86. The rotating shaft 86 can be turned in one direction and in the other direction by a motor 87, which is attached to the upper frame 15.

[0073] The length between the roller screen 85 and a ghost image, which is designed according to the automatic vehicle model, can be varied, and therefore the motor 87 can be movably installed on the uppermost frame 50 in the longitudinal direction of a vehicle.

[0074] Furthermore, according to an exemplary embodiment of the present disclosure, the roll-up screen 85 has a reference pattern 89 to correct the measuring point of the view camera 70 and to inspect and correct the images taken by the view camera 70 on the screen side facing the vehicle in front of it.

[0075] This means that the reference pattern 89 of the roll-up screen 85 periodically performs the calibration on the viewing camera 70 in order to improve the viewing measurement accuracy of the viewing camera 70.

[0076] Furthermore, the reference pattern 89, which is a comparison pattern of the inspection pattern from HUD unit 32, is used for inspecting image distortion and correcting distorted images.

[0077] The reference pattern 89 is printed in a predetermined form on the side of the roll-up screen 85, which is opposite the vehicle in front of it.

[0078] The reference pattern 89 can have rectangular dot patterns, in which a cross shape can be arranged at the central position of it, in order to be used as a central reference point in the case of calibrating the viewing camera 70.

[0079] On the other hand, according to an exemplary embodiment of the present disclosure, the control element 90, which is provided for controlling the entire operation of the inspection device 100, extracts whether the HUD unit 3 is operating normally, including whether a distorted image is being projected, by capturing and analyzing the visual data of the images from the view camera 70, and corrects the distorted images.

[0080] This means that the control element 90 calculates the disturbance amount of the image captured by the view camera 70 into a vector value, by comparing the image with the existing image, inspects on the basis of the calculated value whether the HUD unit 3 is working normally, and corrects the image by transmitting the calculated value to the HUD unit 3.

[0081] Furthermore, the control element 90 receives the detection signals or capture signals from the capture unit 80, which is described above, and checks in real time the obstacles around the view camera 70, for example a worker and the windows of the vehicle in response to the capture signals.

[0082] The control element 90 receives a detection signal from the detection unit 80 and checks for a worker approaching the inspection position when the multi-axis robot 60 is moved downwards to the vehicle 1 by the lift element 40, and if it is determined that a worker has approached the inspection position, the control element 90 can stop the lift element 40.

[0083] Furthermore, the control element 90 receives a detection signal from the detection unit 80 and checks the downward state of a window when the multi-axis robot 60 is moved to the window of the vehicle 1, and if it is determined that the window has moved upward, the control element 90 can stop the multi-axis robot 60.

[0084] An inspection method for a vehicle's head-up display is described in detail below, wherein the inspection device 100 of a vehicle's head-up display is used according to an exemplary embodiment of the present disclosure.

[0085] Fig. Figure 7 is a flowchart which represents an inspection procedure of a head-up display for a vehicle according to an exemplary embodiment of the present disclosure.

[0086] In an exemplary embodiment of the present disclosure, the vehicle 1, which is completed by arranging various parts in a vehicle assembly process, is first transported to the HUD inspection line. In the HUD inspection line, it is checked whether the HUD unit 3 is functioning normally, including whether a distorted image is projected onto the windshield by the HUD unit 3, and any distorted images are corrected.

[0087] In detail, the process of inspecting and correcting HUD Unit 3, as shown in the figures above and in Fig. As referenced in Figure 7, in an exemplary embodiment of the present disclosure, different types of vehicles 1 are transported onto the base of the frame 10 at the inspection position (S11). Next, a worker connects a communication link, such as an OBD, to the vehicle 1 (S12).

[0088] In an exemplary embodiment of the present disclosure, the vehicles 1 are aligned in the front-to-back direction by the front wheel stop member and the rear wheel support member of the alignment unit 20, and likewise in the left-to-right direction by the front wheel rim and the rear wheel rim (S13). Accordingly, in an exemplary embodiment of the present disclosure, it is possible to position different types of vehicles 1 at a predetermined position on the base 11 using the alignment unit 20.

[0089] In this state, in an exemplary embodiment of the present disclosure, the driver's seat window of vehicle 1 is moved downwards (S14). The control element 90 can move the window downwards by sending a window opening signal to vehicle 1 via the communication interface.

[0090] Furthermore, in an exemplary embodiment of the present disclosure, a predetermined image is displayed on the windshield by operating the HUD unit 3. The control element 90 can operate the HUD unit 3 via the communication interface.

[0091] The multi-axis robot 60 has been moved upwards by the lift element 40, and the roller screen 85 has been rolled up around the rotating shaft 86, which has rotated in a different direction.

[0092] The multi-axis robot 60 has completed the alignment by moving forward / backward and left / right with the help of the motion unit 30, accordingly with the position of the vehicle 1 at the location on the base 11.

[0093] In an exemplary embodiment of the present disclosure, the rolling screen 50, which is rolled out on the rotating shaft 86, is rolled downwards by rotating the rotating shaft 86 in a direction as described above, so that the front side of the vehicle 1 is blocked by the rolling screen 85 (S15).

[0094] Then, in an exemplary embodiment of the present disclosure, the above vehicle, which is inspected and corrected by the HUD unit 3 and which is waiting for the next process, and the vehicle behind it, which is to be inspected by the HUD unit 3 (the vehicle inside the frame), are blocked by the rolling screen 85.

[0095] Accordingly, in an exemplary embodiment of the present disclosure, the propagation of light from the taillights of the previous vehicle to the previous vehicle is prevented, and a vision detection error of the vision camera 70 due to the light from the taillights of the previous vehicle can be prevented, as described below.

[0096] According to an exemplary embodiment of the present disclosure, after the process the telescopic cylinder 41 of the lift member 40 is operated, and the multi-axis robot 60 is moved downwards to the window of the driver's seat of the vehicle 1 (S16).

[0097] In this process, the detection unit 80 on the multi-axis robot 60, in an exemplary embodiment of the present disclosure, detects obstacles on the inspection work side and outputs a detection signal to the control element 90 (S17).

[0098] The detection unit 80 can detect obstacles by emitting ultrasonic wave signals and receiving ultrasonic wave signals which are reflected back by the obstacles while it is rotated 360° by the rotary motor 73.

[0099] Then, the control element 90 checks for a worker approaching the inspection position based on the detection signal from the detection unit, and if it is determined that a worker has approached the inspection position (S18), the control element 90 stops the lift element 40.

[0100] Furthermore, the control element 90 receives a detection signal from the detection unit 80 and checks the downward state of a window when the multi-axis robot 60 has moved to the window of the vehicle 1, and if it is determined that the window has moved upward, the control element 90 sends a stop signal to the multi-axis robot 60.

[0101] In this case, the worker manually sends a reset signal to the lift element 40 (S19). Accordingly, the multi-axis robot 60 is returned to its starting position by the lift element 60, and the process described above is repeated.

[0102] Alternatively, if there is no obstacle detected by the detection unit 80 on the inspection work side, the control element 90 causes the arm 61 of the multi-axis robot 60 to move into the vehicle 1 by sending a teach-in control signal to the multi-axis robot 60 (S20).

[0103] In an exemplary embodiment of the present disclosure, the viewing camera 70 then captures the visual image of the reference pattern 89 on the rolling screen 85 and transmits the viewing data to the control element 90. The control element 90 then analyzes the viewing data of the reference pattern 89 and corrects the measuring point of the viewing camera 70, taking into account the lens focus distance and the lens aperture scale or lens aperture ratio.

[0104] In this state, in an exemplary embodiment of the present disclosure, the vision camera 70 records the visual image projected onto the inside of the windshield of the vehicle and transmits the vision data to the control element 90.

[0105] The control element 90 captures the visual image data from the visual camera and extracts whether the HUD unit 3 is operating normally, including whether there is a distorted image, and corrects the distorted images by analyzing the visual data (S21).

[0106] This means that the control element 90 calculates the disturbance amount of an image captured by the view camera 70 into a vector value by comparing the image with the existing image, inspects whether the HUD unit 3 is operating normally on the basis of the calculated value, and corrects the image by transmitting the calculated value to the HUD unit 3.

[0107] If there is a distorted image, the control element 90 corrects the image on the windshield by controlling the operation of the transmission, reflection and magnification of an image by the HUD unit 3.

[0108] In an exemplary embodiment of the present disclosure, the inspection and correction of the distorted images are carried out by the reference pattern 89, which is printed on the roll-up screen 85, that is, the centers of the inspection patterns are inspected and the distorted images are corrected on the basis of the reference pattern 89 by projecting the inspection patterns onto the windscreen via the HUD unit 3.

[0109] This means that the control element 90 corrects the distorted images during the inspection of the distorted images in real time, by comparing the reference pattern on the roll-up screen 85 with the inspection patterns.

[0110] Accordingly, in an exemplary embodiment of the present disclosure, it is possible to automatically inspect whether the HUD unit 3 is working normally, including checking whether the images projected onto the windscreen of the vehicle 1 are distorted, and to automatically correct the distorted images by means of the series of processes described above.

[0111] Afterwards, the multi-axis robot 60 is returned to the starting position (S22), the communication connection is disconnected from the vehicle 1 (S23) and the vehicle 1 is moved out of the frame 10 (S24), thereby ending the series of processes for inspecting a head-up display.

[0112] According to an exemplary embodiment of the present disclosure described above, since it is possible to automatically inspect whether the HUD unit 3 is working normally, including checking whether the images projected onto the windshield of the vehicle 1 are distorted, and to automatically correct the distorted images, it is possible to shorten the cycle time for inspecting the HUD unit 3 and to improve the efficiency of the inspection.

[0113] Furthermore, in an exemplary embodiment of the present disclosure, it is possible, since the inspection and correction of the HUD unit 3 are carried out automatically, to efficiently control the inspectors and the quality and to inspect and correct the HUD units 3 in different types of vehicles 1.

[0114] Furthermore, in an exemplary embodiment of the present disclosure, it is possible to actively manage flexible production of several types of vehicles and to reduce the additional manpower or human labor and the investment costs for reconstructing and re-manufacturing corrective / inspecting equipment depending on the types of new vehicles. <Beschreibung der Symbole> 1 vehicle 3 HUD units 10 frames 11 Basic 13 column frames 15 top frame 20 alignment units 30 movement units 31 first moving limb 32 second moving link 35 first servo motor 36 first threaded spindle 37 second servo motor 38 second threaded spindle 40 Lift link 41 telescopic cylinders 51 connecting brackets 53 Actuator tube 55 mounting brackets 56 Security rod 57 coupling holders 60 multi-axis robots 61 Arm 70 View camera 71 Sensor holders 73 Rotary motor 80 recording units 81 Ultrasonic wave sensor 85" roll-up screen 86 Rotary shaft 87 Engine 89 reference patterns 90 Control element

Claims

[1] Inspection device (100) of a head-up display (HUD) for a vehicle (1), wherein images are projected onto a windshield of the vehicle (1) by a HUD unit (3) in the vehicle (1), the quality of the images is automatically inspected and the image on the windshield is corrected by controlling the operation of the HUD unit (3), the inspection device comprising: a frame (10) which transports the vehicle (1) in a reverse and forward direction; a movement unit (30) which is coupled to the frame (10) and which is divided into front and rear and left and right directions of the vehicle (1) moved back and forth; a multi-axis robot (60) which is attached to the motion unit (30) via a lift link (40), which is configured to move up and down, and which is moved into and out of the vehicle (1); a vision camera (70) mounted on an arm (61) of the multi-axis robot (60), which captures the images projected onto the windshield as vision data; and a control element (90) which inspects whether the HUD unit (3) is working normally and controls the operation of the HUD unit (3) by analyzing the visual data captured by the visual camera (70), wherein a roll-up screen (85) which moves towards a front side of the vehicle (1) and blocks the front side of the vehicle (1) is arranged above the frame (10). [2] Inspection device according to claim 1, which further comprises: an alignment unit (20) which is arranged on a base (11) of the frame (10) and aligns the vehicle (1) at a predetermined position. [3] Inspection device according to claim 1, wherein: the lift element (40) includes: a telescopic cylinder (41) which is connected to the multi-axis robot (60) and is vertically attached to the motion unit (30). [4] Inspection device according to claim 3, wherein: the telescopic cylinder (41) includes: a connecting holder (51) which is connected to the movement unit (30), a plurality of actuator tubes (53) which are attached to the connecting holder (51) via a mounting bracket (55) and which are operated forwards and backwards in a multi-stage manner by hydraulic pressure, and a coupling holder (57) which is connected to the actuator tubes (53) and combined with the multi-axis robot (60). [5] Inspection device according to claim 4, wherein the mounting bracket (55) and the coupling bracket (57) are connected via a safety rod (56). [6] Inspection device according to claim 1, wherein: The movement unit (30) includes: a first movement element (31) which slides forwards and backwards over the frame (10), and a second movement element (32) which is attached to the first movement element (31) to slide to the left and right, and to support the lift element (40). [7] Inspection device according to claim 1, wherein: a detection unit (80) which detects obstacles around the view camera (70) is attached to the multi-axis robot (60). [8] Inspection device according to claim 7, wherein: the vision camera (70) and the detection unit (80) are attached to the arm (61) of the multi-axis robot (60) via a sensor holder (71), and the sensor holder (71) is capable of 360° rotation on the arm (61) of the multi-axis robot (60) using a rotary motor (73). [9] Inspection device according to claim 7, wherein the detection unit (80) includes an ultrasonic wave sensor (81). [10] Inspection device according to claim 9, wherein: a reference pattern (89) is formed for correcting a measurement point of the viewing camera (70) and inspecting and correcting the image on the roll-up screen (85). [11] Inspection device according to claim 10, wherein: the reference pattern (89) includes rectangular dot patterns in which a cross shape is formed at a central position of the same. [12] Inspection device according to claim 9, wherein: the roll-up screen (85) is movably installed on the frame (10) in a longitudinal direction of a vehicle (1). [13] Inspection method of a head-up display (HUD) in a vehicle (1) which uses the inspection device of claim 1, wherein images are projected onto a windshield of the vehicle (1) by a HUD unit (3) in the vehicle (1), wherein the quality of the images is automatically inspected and the image on the windshield is corrected by controlling the operation of the HUD unit (3), wherein the method comprises: (a) Connecting a communication connector to the vehicle (1) when the vehicle (1) is being moved onto a frame (10), wherein when the vehicle (1) is being moved onto the frame (10), the communication connector is being connected to the vehicle (1), the vehicle (1) is being aligned at a predetermined position, and the windows of the vehicle (1) are being moved downwards; (b) Moving a multi-axis robot (60) downwards to the window of the vehicle seat of the vehicle (1) using a lift element (40) and capturing an image projected onto the windshield glass as vision data with a vision camera (70) on the multi-axis robot (60); (c) Inspecting whether the HUD unit (3) is functioning normally by analyzing the visual data captured by the visual camera (70); and (d) Controlling the operation of the HUD unit (3) and correcting the image when it is determined that the image on the windscreen glass is disturbed. [14] Inspection method according to claim 13, wherein: in the process (b) Obstacles around the view camera (70) are detected by a detection unit (80) and the detection signals are output to a control signal. [15] Inspection method according to claim 14, wherein the operation of the lift element (40) is configured to be stopped in response to a detection signal from the detection unit (80). [16] Inspection method according to claim 14, wherein the operation of the multi-axis robot (60) is configured to be stopped in response to a detection signal from the detection unit (80). [17] Inspection method according to claim 13, wherein: in the process (a), when the vehicle (1) is transported on the frame (10), a roll-up screen (85) is rolled down and blocks a front side of the vehicle (1). [18] Inspection method according to claim 17, wherein: in the process (b) a measuring point of the viewing camera (70) is corrected based on a reference pattern (89) on the rolling screen (85). [19] Inspection method according to claim 18, wherein: in the process (c) a center of an inspection pattern based on the reference pattern (89) is inspected by sending the inspection pattern to the reference pattern (89). [20] Inspection method according to claim 19, wherein: in the process (d) the operation of the HUD unit (3) is controlled and the distorted image is corrected accordingly to a result of comparing the reference pattern (89) with the inspection pattern.

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