KR100304646B1 - Bottle inspection system and method thereof - Google Patents

Abstract

The bottle inspection apparatus according to the present invention is a device for inspecting a bottle conveyed by a conveyor device, is installed in close proximity to one side of the conveyor device, and is projected by the conveyor device to shine light to the bottle passing through a predetermined position Light source for; A camera spaced apart from the light source by a predetermined distance and receiving light passing through the bottle and outputting a corresponding camera image signal; A sensor installed close to one side of the conveyor device and generating a corresponding detection signal each time the bottle passes in front of the camera; A vision system electrically connected to the camera and a sensor, the vision system receiving the camera image signal according to a detection signal from the sensor, performing a test operation on a bottle, and outputting a result and the received camera image signal; And a display device receiving an output signal from the vision system and displaying a test result and a camera image on a screen.

According to the present invention, since the bottle is inspected using a vision system in which an outline memory module, a quantity setting module, an inspection area list generation module, and an inspection module program for testing a bottle are embedded, a desired bottle and an unwanted bottle are checked. It has the advantage of being able to sort out automatically.

Description

Bottle inspection system and method

The present invention relates to a bottle testing apparatus and a method thereof, and in particular, it is possible to automatically classify desired and undesired bottles automatically by using a vision system in which a predetermined program for checking a bottle is embedded. It relates to a bottle inspection device and a method thereof.

In beverage bottle lines, bottle inspection devices are typically used to pre-screen and remove damaged or contaminated bottles before they reach the device for injecting the contents.

1 is a schematic device configuration diagram of such a conventional bottle inspection apparatus.

Referring to FIG. 1, a conventional bottle inspection apparatus 10 includes a light source 11 for shining light onto a bottle 16 transported by a conveyor belt 15, and an agent for inspecting sidewalls of the bottle 16. The first camera 12, the second camera 13 for inspecting the outline, the height, or the color of the bottle 16, and the light beam passing through the bottle 16 are incident to the first camera 12. It consists of a plurality of reflectors 14a-14g for reflecting the path of the light beam and a calculation device (not shown) for reading and calculating the images recorded by the first camera 12 by a control program. Here, the first camera 12 is provided with an image plate (not shown) composed of a charge coupled device (CCD) in which images transmitted along the optical path are formed.

In the conventional bottle inspection apparatus 10 of the above structure, when the bottle (s) 16 are conveyed by the conveyor belt 15 and pass in front of the light source 11, the light irradiated from the light source 11 The bottle 16 is illuminated, and the light beam passing through the bottle 16 is reflected by a plurality of reflecting mirrors 14a to 14g and is incident on the first camera 12. Then, the first camera 12 records the images of the incident bottle 16, and the calculation device reads and calculates the recorded images. As a result, abnormality of the side wall of the bottle 16 is detected. In addition, the light beam passing through the bottle 16 is incident directly to the second camera 13 via the reflecting mirrors 14a to 14g, and the second camera 13 passes through the bottle 16 through the incident light beam. Record the contour, height or color of the device, and the calculation device reads and calculates the recorded data. Then, the outline, height or color of the bottle 16 is detected.

However, since the conventional bottle inspection apparatus as described above uses a plurality of reflecting mirrors 14a to 14g, there is a high possibility that the image of the projected bottle is distorted while the light beam passes through the reflecting mirrors, thereby There is a disadvantage that it is difficult to accurately detect a defect. In addition, it is not easy to precisely arrange the angle and distance of the reflectors according to the design value, and the technical plan is accompanied by technical difficulties such as the plan view of the reflectors also requires precision processing.

SUMMARY OF THE INVENTION The present invention has been made to improve the above problems, and an object thereof is to provide a bottle inspection apparatus and a method for automatically classifying desired and undesired bottles automatically using a vision system.

1 is a schematic device configuration diagram of a conventional bottle inspection device.

Figure 2 is a schematic device configuration of the bottle inspection apparatus according to the present invention.

3 is a view showing an image of a bottle input to the camera of the bottle inspection device of FIG.

4 is a schematic internal configuration diagram of a vision system of the bottle inspection device of FIG.

5 is a flow chart showing the execution process of the bottle inspection method according to the present invention.

6 and 7 are views illustrating a process of generating bottle outline data in the bottle inspection method according to the present invention.

8 and 9 are views illustrating a process of generating an inspection area in the bottle inspection method according to the present invention.

<Explanation of symbols for main parts of the drawings>

11,21 ... light source 12 ... first camera

13 Second Camera 14a-14g ...

15 ... conveyor belt 16,28 ... bottle

22 Camera ... 23 Sensor

24 ... vision system 25 ... monitor

26 ... Mouse 27 ... Conveyor Unit

31.Camera image 41 ... Outline memory module

42 ... setting module 43 ... inspection area list generation module

44 Inspection module 41a, 42a, 43a ... Mouse input

41b ... Outline memory bottle input image 41c ... Bottle outline data

42b ... Goods outline data reference list 43b ... Outline margin of error

42c ... Bad outline data reference list 43c ... Inspection area list

44a ... Sensor detection signal 44b ... Inspection bottle input image

44c ... eject signal

In order to achieve the above object, the bottle inspection apparatus according to the present invention, in the device for inspecting the bottles conveyed by the conveyor apparatus, is installed in close proximity to one side of the conveyor apparatus, is transferred by the conveyor apparatus to a predetermined position A light source for illuminating the bottle passing through the light source; A camera spaced apart from the light source by a predetermined distance and receiving light passing through the bottle and outputting a corresponding camera image signal; A sensor installed close to one side of the conveyor device and generating a corresponding detection signal each time the bottle passes in front of the camera; A vision system electrically connected to the camera and a sensor, the vision system receiving the camera image signal according to a detection signal from the sensor, performing a test operation on a bottle, and outputting a result and the received camera image signal; And a display device receiving an output signal from the vision system and displaying a test result and a camera image on a screen.

The vision system may include: an outline memory module configured to receive bottle input images for outline storage and generate bottle outline data; A nursing unit setting module configured to generate a non-defective unit data reference list and a defective outline data reference list by receiving a unit setting command for each bottle outline data; An inspection region list generation module configured to receive an outline error limit setting command and generate an outline error margin and an inspection region list based on the bottle outline data, a good outline data reference list, and a bad outline data reference list; And receiving a test bottle input image whenever a detection signal from the sensor is generated, and generates an outline thereof according to the test area list, and compares the generated outline with the bottle outline data to obtain the difference value. It includes an inspection module for outputting the exit signal if the boundary error is greater than.

In addition, in order to achieve the above object, the bottle inspection method according to the present invention comprises the steps of: (a) inputting an outline memory bottle input image according to the input of the outline memory command by the user; (b) generating bottle outline data according to the input bottle input image for storing the outline; (c) generating a non-defective data reference list and a bad outline data reference list according to an input of a non-fit setting command by the user; (d) generating an outline error limit and an inspection area list based on the bottle outline data, a good article data reference list, and a bad outline data reference list by receiving a command for setting an outline error limit; (e) receiving a test bottle input image each time a detection signal from the sensor is generated and generating the outline internally according to the test area list; And (f) comparing the generated outline data with the bottle outline data and outputting an exit signal if the difference is greater than the outline error limit.

According to the present invention, since the bottle is inspected using a vision system in which an outline memory module, a quantity setting module, an inspection area list generation module, and an inspection module program for testing a bottle are embedded, a desired bottle and an unwanted bottle are checked. It has the advantage of being able to sort out automatically.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic device configuration of a bottle inspection apparatus according to the present invention.

2, the bottle inspection apparatus according to the present invention is installed in close proximity to one side of the conveyor device 27, for the purpose of shining light to the bottle 28, which is transported by the conveyor device 27 and passes through a predetermined position A camera which is installed at a light source 21 and spaced apart from the light source 21 by a predetermined distance, and receives light passing through the bottle 28 and outputs a corresponding camera image 31 signal as shown in FIG. 22 and a sensor 23 which is installed in close proximity to one side of the conveyor device 27 and generates a corresponding detection signal each time the bottle 28 passes in front of the camera 22, and the camera 22. ) Is electrically connected to the sensor 23 and receives the camera image 31 signal according to the detection signal from the sensor 23 to perform an inspection operation on the bottle 28. Vision system 24 and the vision system 24 for outputting a camera image 31 signal It receives the output signals from and a check result as a monitor and a display device 25 showing the video camera 31 on the screen.

Here, the vision system 24, as shown in Figure 4, according to the mouse (26 (see Figure 2)) input by the user (outline memory command) 41a of the outline storage bottle input images (41b) According to the outline memory module 41 which receives the bottle outline data 41c and generates a bottle outline data reference list for each of the bottle outline data 41c according to the user's mouse 26 input (feature setting command) 42a. The bottle outline data 41c receives an input of a contradictory setting module 42 for generating a 42b and a bad outline data reference list 42c, and an edge error limit setting command by a user's mouse 26 input 43a. And an inspection region list generation module 43 and a sensor 23 for generating an outline error limit 43b and an inspection region list 43c based on the good quality outline data reference list 42b and the bad outline data reference list 42c. Sense signal 44a from Each time a test bottle input image 44b is received, an outline is generated internally according to the test region list 43c, and the difference is compared with the bottle outline data 41c. The inspection module 44 for outputting the exit signal 44c is greater than the outline error limit 43b.

Then, a process of inspecting a bottle by the bottle inspection apparatus according to the present invention having the above configuration will be described with reference to FIGS. 2 to 5.

5 is a flowchart showing the execution process of the bottle inspection method according to the present invention.

Referring to FIG. 5, according to the method of the present invention, the outline storage module 41b of the vision system 24 is first outputted with the outline storage bottle input image 41b according to the input of the outline storage command by the user's mouse 26. (Step 51). Then, the bottle outline data 41c is generated according to the inputted outline storage bottle input image 41b (step 52). Here, the bottle outline data 41c finds the outline data measurement start position 62 based on the image 61 of the bottle input as shown in FIG. 6, and the length of the bottle from the start position 62. The diameter value 63 of the bottle along the direction (bottom in FIG. 6) is obtained to create one outline data list. In this case, when the outline data list is graphed, it may be expressed as shown in FIG. 7.

In this way, when the generation of the bottle outline data 41c is completed, the product outline data reference list 42b and the defective outline data reference list 42c are generated in accordance with the input of the command of the fostering setting by the user's mouse 26 input. (Step 53). Thereafter, the user inputs an outline error limit setting command input by the user's mouse 26, and receives an outline error based on the bottle outline data 41c, a good quality data reference list 42b, and a bad outline data reference list 42c. The limit 43b and the inspection area list 43c are generated (step 54). Here, the process of generating the inspection area list 43c will be described in more detail with reference to FIGS. 8 and 9.

First, one set 83 having, as elements, the results of subtracting each defective outline data 82 from the defective outline data reference list 42c from each of the defective outline data reference list 42b. Will be generated. Then, find the maximum value M of the elements of the set 83, and if it is larger than the outline error limit, add the specific inspection area P of the corresponding set to the inspection area list 43c and the maximum The element M of the value M is deleted from the set 83, and the maximum value M obtained from the inspection region position P of the set 83 is the outline error for the remaining elements of the set 83 as well. If greater than the limit, the element is deleted from the set 83. Then, the inspection area list 43c is generated by repeating the above process until the size of the set 83 is zero and taking the finally generated inspection area list.

When the generation of the inspection region list 43c is completed by the above, the inspection module 44 receives the inspection bottle input image 44b every time the detection signal 44a from the sensor 23 occurs, and An outline is generated internally according to the inspection area list 43c (step 55). Then, the generated outline data (NCD: will be displayed in this way for convenience) and the bottle outline data (RCD: will be displayed in this way for convenience) and the difference value (NCD-RCD) is compared to the outline. It is determined whether it is larger than the error limit (step 56). In this determination, if the difference value NCD-RCD is larger than the outline error limit, the inspection module 44 outputs the exit signal 44c to the conveyor apparatus 27 (step 57). This means that a defective bottle or an undesired type of bottle has been put in, and the conveyor apparatus 27 receiving the exit signal causes the bottle to be removed from the conveyor belt (not shown). On the other hand, in step 56, if the difference value (NCD-RCD) is not larger than the marginal error limit, the inspection module 44 recognizes that the normal bottle is inserted, and does not output a different signal. This completes the inspection cycle for one bottle.

As described above, the bottle inspection apparatus and the method according to the present invention is to open the bottle by using a vision system with a program of the outline memory module, the head setting module, the inspection area list generation module and the inspection module for the examination of the bottle Since the inspection, there is an advantage that can automatically and precisely classify the desired and unwanted bottles.

Claims (5)

An apparatus for inspecting a bottle carried by a conveyor apparatus, A light source disposed proximate to one side of the conveyor apparatus and configured to emit light into a bottle that is transferred by the conveyor apparatus and passes through a predetermined position; A camera spaced apart from the light source by a predetermined distance and receiving light passing through the bottle and outputting a corresponding camera image signal; A sensor installed close to one side of the conveyor device and generating a corresponding detection signal each time the bottle passes in front of the camera; A vision system electrically connected to the camera and a sensor, the vision system receiving the camera image signal according to a detection signal from the sensor, performing a test operation on a bottle, and outputting a result and the received camera image signal; And And a display device receiving an output signal from the vision system and displaying a test result and a camera image on a screen. The method of claim 1, The vision system may include: an outline memory module configured to receive bottle input images for outline storage and generate bottle outline data; A nursing unit setting module configured to generate a non-defective unit data reference list and a defective outline data reference list by receiving a unit setting command for each bottle outline data; An inspection region list generation module configured to receive an outline error limit setting command and generate an outline error margin and an inspection region list based on the bottle outline data, a good outline data reference list, and a bad outline data reference list; And Whenever the detection signal from the sensor is received, the test bottle input image is input to generate an outline internally according to the inspection region list, and the generated outline is compared with the bottle outline data, and the difference value is the outline. And a test module for outputting a withdrawal signal if greater than the error limit. (a) inputting an outline memory bottle input image according to an input of an outline memory command by a user; (b) generating bottle outline data according to the input bottle input image for storing the outline; (c) generating a non-defective data reference list and a bad outline data reference list according to an input of a non-fit setting command by the user; (d) generating an outline error limit and an inspection area list based on the bottle outline data, a good article data reference list, and a bad outline data reference list by receiving a command for setting an outline error limit; (e) receiving a test bottle input image each time a detection signal from the sensor is generated and generating the outline internally according to the test area list; And and (f) comparing the generated outline data with the bottle outline data and outputting an exit signal if the difference is greater than the outline error limit. The method of claim 3, wherein The bottle outline data of step (b) is generated by finding a start point of the measurement of the outline data based on the input image of the bottle, and obtaining a diameter value of the bottle along the length direction of the bottle from the start position to create a list. Bottle inspection method characterized in that. The method of claim 3, wherein The method of generating a test region list of step (d), (d-1) generating a set having elements as a result of subtracting each bad outline data of the bad outline data list from each good outline data of the good quality outline data list; (d-2) find the maximum value of the elements of the set, and if it is larger than the outline error limit, add the inspection area of the corresponding set to the inspection area list and delete the element of the maximum value from the collection; Deleting the remaining elements of the set from the set if the maximum value obtained from the inspection region position of the set is larger than the outline error limit; (d-3) repeating step (d-2) until the size of the set becomes zero; And (d-4) After the completion of the step (d-3), comprising the step of taking the finally generated inspection area list.