CN210455027U

CN210455027U - Inspection equipment for vehicle mixed line production system and vehicle mixed line production system

Info

Publication number: CN210455027U
Application number: CN201921013424.6U
Authority: CN
Inventors: 杨洁
Original assignee: BMW Brilliance Automotive Ltd
Current assignee: BMW Brilliance Automotive Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-05-05
Anticipated expiration: 2029-07-01

Abstract

The utility model relates to a check out test set for vehicle mixed line production system, it is used for examining whether the part correctly assembles. In order to realize carrying out the inspection whether correctly assemble to the part with the automation, avoid artifical inspection and can improve inspection efficiency and guarantee the inspection accuracy, according to the utility model discloses an inspection equipment includes: an image acquisition device for acquiring a field image of a part mounted on a vehicle; vehicle number reading means for reading a vehicle number; the vehicle configuration acquisition device is used for acquiring vehicle configuration according to the vehicle number; the reference image selecting device is used for selecting a reference image of a part according to the vehicle configuration; comparing means for comparing the live image with a reference image and generating a comparison result; and the output device is used for outputting the comparison result. Furthermore, the utility model discloses still relate to a vehicle production system that mixes, including the conveyor who is used for conveying vehicle and according to the utility model discloses an inspection equipment.

Description

Inspection equipment for vehicle mixed line production system and vehicle mixed line production system

Technical Field

The utility model relates to a check out test set for vehicle mixed line production system, check out test set is used for examining whether the part correctly assembles. The utility model discloses still relate to a vehicle production system that mixes.

Background

In a vehicle mix line production system, vehicles that are typically produced simultaneously on one production line may belong to different vehicle models and/or different configurations of the same vehicle model. For example, passenger cars and off-road vehicles can be assembled one after the other, in particular interspersed with one another, on the same production line. Furthermore, it is also possible in the passenger car and the off-road vehicle to differ from each other in model or configuration.

Fitting a vehicle with parts in such a vehicle mix line production system is particularly cumbersome, since different parts and/or different mounting means may be required for different vehicle models or different configurations. In the aspect of part preparation, different parts are respectively installed after being manually sequenced according to the production sequence in the current process. Moreover, the assembler may also confuse the manner in which these components are installed. Therefore, assembly errors often occur in the mixed line production.

In order to avoid the assembly errors, special quality inspectors perform manual inspection vehicle by vehicle subsequently. This inevitably results in additional labor and time costs. Further, when an error is found, the entire vehicle needs to be taken off line for repair, which undoubtedly causes additional man-hours, further increasing the production cost. Due to the mixed line production, assembly errors occur on one vehicle, and the processing progress of a series of subsequent vehicles is likely to be independently generated, so that the production efficiency is seriously reduced. Moreover, manual inspection sometimes makes it difficult to ensure accuracy.

When the parts in the vehicle are assembled and checked, a quality inspector often needs to enter the vehicle; when the parts in the front cover of the vehicle are assembled and checked, a quality inspector needs to bend down; when the parts at the bottom of the vehicle are assembled and checked, a quality inspector needs to drill under the vehicle. Repeated operation for a long time will cause labor damage to quality inspectors.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inspection machine and a vehicle production system that mixes for vehicle production system that mixes, inspection machine and vehicle mixed line generating system can carry out the inspection whether correctly assemble the part automatically, avoid artifical inspection and can improve the efficiency of inspection and guarantee the inspection accuracy.

According to the utility model discloses a check out test set for vehicle system of mixing production sets up to be used for examining whether the part correctly assembles, wherein, check out test set includes:

an image acquisition device for acquiring a field image of a part mounted on a vehicle;

vehicle number reading means for reading a vehicle number;

the vehicle configuration acquisition device is used for acquiring vehicle configuration according to the vehicle number;

the reference image selecting device is used for selecting a reference image of a part according to the vehicle configuration;

comparing means for comparing the live image with a reference image and generating a comparison result;

and the output device is used for outputting the comparison result.

By means of the above-mentioned checking device, it is possible to automatically check whether the parts are correctly assembled. Therefore, manual inspection can be avoided, labor cost for inspection can be saved, additional man-hours caused by repair can be reduced, and production efficiency can be improved. Moreover, the accuracy of the inspection can be ensured on the one hand and only extremely short inspection time is required on the other hand based on digital automated processing, so that the production speed can also be increased.

Furthermore, according to the utility model discloses, the correct assembly of inspection part is not only including the inspection whether installed the part and whether the inspection has installed correct part, but also is including the inspection part whether installed correctly. Through according to the utility model discloses an image comparison not only can find out whether the correct part has appeared in the image, can find out whether the part is installed with the correct mode (such as direction, position, relation of connection etc.) moreover.

In the present invention, the image capturing device may include a camera, a video camera or other image sensing device with an optical sensor.

In the present invention, the vehicle number reading device may include a code scanner, a number reader, an optical sensor with number recognition, an RFID tag reader, or the like. In particular, the vehicle number reading device reads the vehicle number by image recognition and/or wireless communication.

The utility model discloses in, vehicle configuration acquisition device can follow the corresponding vehicle configuration of vehicle number inquiry in the production arrangement list of prestore, perhaps can visit the production arrangement information of vehicle mixed line production system to transfer corresponding configuration.

The utility model discloses in, the prestore has the reference image when the part is correctly installed under different vehicle configurations. Thus, a desired reference image can be selected according to the acquired vehicle configuration.

In the present invention, the comparison device is an image processing device capable of performing image comparison, such as a computer, a programmable logic circuit system, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA) electronic circuit system, in which a corresponding program or instruction is installed. The utility model discloses in, the comparison device can compare the part of the image of gathering. The comparison result may relate to the fact that the live image may or may not coincide with the reference image.

The utility model discloses in, output device is used for exporting comparison result to assembly quality, vehicle mixed line production system etc. to inform whether the part correctly assembles. In the simplest embodiment, the output device may be a light and/or a speaker.

According to one embodiment, the comparison device compares the features of the vehicle parts in the image. In this case, only the features in the image are extracted and compared, the amount of calculation can be significantly reduced compared to the comparison of the entire image, and interference due to the light environment and the positional deviation can be avoided. Thus, efficient and accurate inspection can be achieved.

According to one embodiment, the features of the vehicle part in the image include: icons, characters, bar codes, numbers, lines, corners on the vehicle parts; size, shape, contour, position, orientation of the part; as well as the distance, angle, connection of the parts relative to the rest of the vehicle, etc. In this way, targeted testing can be achieved by extracting only these simple features. For example, in inspecting the shade, since differently configured shades have labels of different patterns, it is possible to verify whether the correct shade is assembled in the vehicle configuration by comparing the icons on the labels of the shades. For example, in checking a vehicle headlamp, since different models of headlamps are provided with different bar codes, it is possible to verify whether the correct shade is fitted in accordance with the vehicle configuration by comparing icons on the bar codes on the headlamps. For example, when a fuel filter is mounted, since the inlet and outlet of the filter have different shapes, it is possible to check whether the filter is mounted in the correct orientation by comparing the shapes in the images. For example, in the case of two or more structural members, since the structural members have a fixed layout with respect to each other, it is possible to check whether the structural members are mounted in the correct orientation by comparing the layout in the image and its details, such as the distance or angle between each other, the connection relationship, and the like.

In one embodiment, the comparison means compare the images by means of a gray-scale processing of the live images. The gray scale processing of the live images is particularly advantageous here, since the data volume of the gray scale map is greatly reduced compared to the color map, reducing the requirements on the computing performance of the comparison device. In addition, the gray-scale map can be processed uniformly, and deviation caused by light environment change is prevented. In the case of comparison with a gray-scale map, this feature of the components to be compared, in particular of the components, can be easily determined by extracting pixels with gray-scale values in a threshold range. Likewise, corresponding features may also be extracted by gray scale gradient changes within the image. Therefore, the gray processing of the field image can simplify the calculation, reduce the calculation performance requirement, and improve the verification speed and the verification accuracy.

In one embodiment, the inspection apparatus further comprises: and an archiving device for archiving the vehicle number in association with the live image. The production file can be established for each vehicle by archiving the field image, so that the quality inquiry and quality tracing in the future are facilitated.

In one embodiment, the output device emits a visual and/or audible signal indicating release when the comparison indicates that the live image corresponds to the reference image; when the comparison result shows that the field image does not accord with the reference image, the output device sends out an optical signal and/or an acoustic signal which represents forbidden. In this case, the testing device according to the invention is preferably arranged after the respective component assembly step, in particular in the immediate vicinity of the component assembly site. Thus, the check can be performed immediately after the assembly is completed, so that the assembly can be immediately known to be correct or not. When the wrong component is mounted or not mounted as intended, the output of the checking device is immediately fed back to the mounting person by means of lights and/or sounds, so that the mounting person can immediately correct the error, for example, replace the correct component or adjust the mounting of the component on site. Here, the visual signal may be given by lighting on and off of the light, the color of the light, the dynamic effect of the light, and the like; while the auditory signal may be given by a cue tone, speech, music, etc. The emission of an audible signal is preferred, since the assembler does not have to spend time observing the corresponding light but only has to focus on the next assembly step. According to this embodiment, only vehicles with correctly installed parts can be released and then the assembly process continues along the production line of the production system. Therefore, the vehicle qualification rate can be guaranteed with extremely high efficiency, the correctness of each production flow is guaranteed to a great extent, the quality of the whole vehicle is improved, and the working hours consumed by reworking and maintaining are reduced.

In one embodiment, the output device further comprises a display, and when the comparison result indicates that the live image does not correspond to the reference image, the display displays at least one of: reference image, difference between live image and reference image, correct part, and vehicle configuration. Therefore, an assembler can clearly know the problem of part assembly through the display of the output device, and can conveniently replace or refit parts.

According to one embodiment, the test device comprises: and the triggering device is used for triggering the checking process when the vehicle reaches the checking equipment. In this case, the triggering device only checks when the vehicle is in position, which saves checking and computational effort.

According to the utility model discloses an on the other hand, according to the utility model discloses a vehicle mixed line production system includes: conveyor for conveying vehicles and the above-mentioned inspection device according to the invention.

Here, be provided with according to the utility model discloses a check out test set's vehicle mixed line production system can realize automatic inspection, efficient production, the error rate of reduction, the vehicle assembly qualification rate of improvement and the cost of labor and the time cost of reduction.

Drawings

FIG. 1 shows a block diagram of an inspection apparatus for a vehicle wire-mixing production system;

fig. 2 shows a block diagram of the test device in fig. 1, wherein additionally the signal connections between the individual devices are shown;

FIG. 3 shows a schematic diagram of a vehicle mix-line production;

fig. 4a shows a schematic view of a label for one type of sun visor;

fig. 4b shows a schematic view of a label for a sun visor of another signal;

FIG. 5a shows a simplified schematic of a correct assembly of the fuel filter;

FIG. 5b shows a simplified schematic illustration of a misassembly of the fuel filter;

FIG. 6a shows a simplified schematic of the correct assembly of two parts;

fig. 6b shows a simplified schematic of a faulty assembly of two parts.

Detailed Description

Fig. 1 shows a block diagram of an inspection apparatus 100 for a vehicle hybrid line production system. The inspection apparatus 100 includes:

an image acquisition device 101 for acquiring a field image of a part mounted on a vehicle;

a vehicle number reading means 102 for reading a vehicle number;

a vehicle configuration acquiring device 103 for acquiring a vehicle configuration according to the vehicle number;

a reference image selecting device 104 for selecting a reference image of a part according to the vehicle configuration;

comparison means 105 for comparing the live image with the reference image and generating a comparison result;

and an output device 106 for outputting the comparison result.

Fig. 2 shows a block diagram of the test device 100 from fig. 1, with signal connections between the individual devices additionally being shown. As shown in fig. 2, the image pickup device 101 picks up a live image 11 of a part already mounted on a vehicle. The live image 11 is fed to a comparison device 105. Further, the vehicle number reading device 102 reads the vehicle number 12. The vehicle number 12 is supplied to the vehicle configuration acquisition means 103 for acquiring the vehicle configuration 13 from the vehicle number 12. The vehicle configuration 13 is received by the reference image selection means 104, so that a reference image 14 of the part can be selected according to said vehicle configuration 13. The reference image 14 is provided to a comparison means 105, so that the comparison means 105 can be used to compare the live image 11 with the reference image 14 and to generate a comparison result 15. The comparison result 15 is received by the output device 105, and the output device 105 outputs accordingly.

Preferably, the comparison means 105 compares the features of the vehicle parts in the image. The features compared at the comparison means 105 include: icons, characters, bar codes, numbers, lines, corners on the vehicle parts; size, shape, contour, position, orientation of the part; and the distance, angle, connection of the part relative to the rest of the vehicle. Particularly preferably, the comparison means 105 compare the images by means of a gray-scale processing of the live images.

Furthermore, according to the present invention, the inspection apparatus 100 may further include: a filing means for filing the vehicle number in association with the live image; and/or a triggering device for triggering a test process when the vehicle reaches the test device.

Fig. 3 shows a schematic diagram of a vehicle mix line production. Fig. 3 shows only a part of the testing device according to the present invention, which includes an image capture device 101 and an output device 106. In fig. 3,

vehicles

1a and 1b having different configurations are assembled in a vehicle hybrid line production system. The

vehicles

1a and 1b are transported in the transport direction X by means of

transport devices

2a and 2b for transporting the vehicles, respectively. The

transport devices

2a and 2b are shown here in the form of push plates. Without being limited thereto, other transport devices for transporting vehicles, such as spreaders, conveyor belts, etc., are also contemplated. The vehicle 1a reaches a test position in which the test device 100 according to the invention is arranged. Here, the live image 11 of the part that has been mounted on the vehicle is captured by the image capturing device 101, and the vehicle number is read by a vehicle number reading device that is not shown in fig. 3. After the above-mentioned signal is processed by the inspection apparatus 100, the output device 106 outputs the comparison result 15. In fig. 3, the output device 106 is configured as a lamp. In this case, the output device 106 can emit a green light signal indicating the release when the comparison result 15 indicates that the field image 11 corresponds to the reference image 14; when the comparison result 15 indicates that the live image 11 does not match the reference image 14, the output device 105 emits a red light signal indicating prohibition. The fitter can thus immediately know whether the part in question has been fitted correctly.

Not limited to the situation shown in fig. 3, the output device 106 may further comprise a display that displays at least one of the following when the comparison result 15 indicates that the live image 11 does not coincide with the reference image 14: reference image 14, differences in live view 11 and reference image 14, correct parts, and vehicle configuration. Thereby, the assembler can know more clearly where the error in the assembly is.

Fig. 4a shows a schematic view of a label for one type of sun visor; fig. 4b shows a schematic view of a label for a sun visor of another signal. Different vehicle models sold to different countries may be involved in the vehicle mix line production. Thus, the icons and/or text on the assembled components may differ from one another, thereby causing the vehicle configurations to differ from one another. Here, fig. 4a relates to a sun visor for a vehicle sold in a country other than china, in which the use notice of the airbag is presented only by a simple icon. Fig. 4b relates to a sun visor for vehicles sold in china, in which the use notes of the airbag are detailed using chinese and english, respectively. In the inspection apparatus 100 according to the present invention, the vehicle configuration 13 is obtained by the vehicle number 12, that is, the sun visor with that kind of icon should be mounted on the

vehicles

1a and 1b, respectively. A pre-stored reference image 14 of the correctly assembled part can be selected according to the vehicle configuration 13. For example, the vehicle 1a is a vehicle sold abroad to which a sun visor with a tag as shown in fig. 4a should be fitted. At this time, the reference image selecting device will select the reference image with the label shown in fig. 4 a. The comparison means 105 then compare the live image 11 with the selected reference image 14 and generate a comparison result 15. In particular, it may be compared whether an icon on the label coincides with an icon in the reference image. Additionally, comparing characters, barcodes, numbers, lines, corners, etc. on a label is also contemplated. If the label coincides with a height in the reference image, a comparison result 15 can be generated that the live image 11 coincides with the reference image 14; if the degree of coincidence is low or does not coincide at all, a comparison result 15 is generated in which the live image 11 does not coincide with the reference image 14. In this case, certain tolerances can be set in the comparison device in order to filter out errors due to the lighting environment, positional deviations and assembly tolerances. Finally, the comparison result 15 is outputted by the output device 106.

FIG. 5a shows a simplified schematic of a correct assembly of the fuel filter; fig. 5b shows a simplified schematic illustration of a faulty assembly of the fuel filter. Fig. 5a and 5b each show a schematic illustration of the fuel filter 3 fastened to a further component of the vehicle by means of a pressure plate 4. The pressure plate 4 presses the fuel filter 3 against the other components by means of screws at both ends. In the correct assembly shown in fig. 5a, the narrower tip of the fuel filter 3 is to be placed to the left. In the incorrect assembly drawing shown in fig. 5b, the narrower tip of the fuel filter 3 is placed to the right in the incorrect direction. Fig. 5a, which is correctly assembled, can be used as a reference image of the component for comparison. When the live picture is the situation shown in 5b, the comparison result will indicate that the live picture 11 does not match the reference picture 14. Here, the image as in fig. 5b may be subjected to a gray scale process. The contour of the fuel filter 3 can be taken from the background. By simply comparing the profiles of the fuel filter 3 in fig. 5b and 5a, it will be seen that the profile overlap of the fuel filter 3 is low, thereby determining that the fuel filter 3 is not properly assembled. Without being limited thereto, the stepped shape at the narrow end of the fuel filter 3 can be extracted from the field image. A comparison of the local shape by the comparison means 105 will result in that the same or approximately the same shape cannot be found in the live image 11 at the position where the narrow end should appear, whereby a comparison result 15 indicating that the live image 11 does not correspond to the reference image 14 can be output by the output means 106.

FIG. 6a shows a simplified schematic of the correct assembly of two parts; fig. 6b shows a simplified schematic of a faulty assembly of two parts. As shown in fig. 6a, the first part 5a and the second part 6b should abut each other on one side when correctly assembled and form an angle 7a between the two parts. However, in the case of a wrong assembly as shown in fig. 6b, the first part 5b and the second part 6b do not abut against each other, a gap is formed between the two parts, and the angle 7b between the two parts is enlarged relative to 7 a. Here, fig. 6a may be taken as the reference image 14, and fig. 6b may be taken as the live image 11. Thus, the comparison means of the inspection device 100 according to the invention can on the one hand compare the respective shape, contour, position or orientation of the two parts in the field image and on the other hand compare the distance, angle of the second part 6a or 6b relative to the

first part

5a or 5 b. For example, the comparing means 105 will find that the angle 7b in fig. 6b as live image is significantly larger than the angle 7a in fig. 6a as reference image. Based on such comparison results, a comparison result 15 indicating that the live image 11 does not match the reference image 14 may be output by the output device 106.

The features disclosed in the present document can be implemented both individually and in any combination. It is further noted that the various drawings of the invention are schematic and may not be shown to scale. The number, configuration and/or arrangement of parts in the various embodiments is also not limited to the examples shown. The values listed in the description are reference values only, which may be exceeded or fallen below when the dimensions are suitably selected.

Claims

1. An inspection apparatus for a vehicle mix line production system, the inspection apparatus for inspecting whether parts are properly assembled, the inspection apparatus comprising:

vehicle number reading means for reading a vehicle number;

and the output device is used for outputting the comparison result.

2. The inspection apparatus of claim 1, wherein said comparison means compares the characteristics of the vehicle part in the image.

3. The inspection apparatus of claim 2, wherein the features of the vehicle part in the image comprise:

icons, characters, bar codes, numbers, lines, corners on the vehicle parts;

size, shape, contour, position, orientation of the part; and

distance, angle, connection of the part relative to the rest of the vehicle.

4. An inspection apparatus according to claim 3, wherein the comparison means compares the images by means of grey scale processing of the live images.

5. The inspection apparatus according to any one of claims 1 to 3, wherein said inspection apparatus further comprises:

and an archiving device for archiving the vehicle number in association with the live image.

6. The inspection apparatus according to any one of claims 1 to 3, wherein said vehicle number reading means reads the vehicle number by image recognition and/or wireless communication.

7. An inspection apparatus according to any one of claims 1 to 3,

when the comparison result shows that the live image is consistent with the reference image, the output device sends out a visual signal and/or an auditory signal representing passing;

when the comparison result shows that the field image does not accord with the reference image, the output device sends out an optical signal and/or an acoustic signal which represents forbidden.

8. The inspection apparatus of claim 7, wherein the output device further comprises a display that displays at least one of the following when the comparison result indicates that the live image does not correspond to the reference image: reference image, difference between live image and reference image, correct part, and vehicle configuration.

9. The inspection apparatus of one of claims 1 to 4, wherein said inspection apparatus comprises:

and the triggering device is used for triggering the checking process when the vehicle reaches the checking equipment.

10. Vehicle mixed-line production system, characterized in that the system comprises:

a conveying device for conveying the vehicle; and

an inspection apparatus according to any one of claims 1 to 9.