Control screening machine

 

(57) Abstract:

The invention relates to a device for measuring the geometrical dimensions and defects of type posichek, chips, cracks glassware. Control screening machine includes a frame, a frame, a rotary table with motor, sprocket feed inspection object with the transport belt, sprocket, return the control object on a conveyor belt, a TV camera, the processing device mappings and sorting device. The motor speed of the rotating table and the motor speed of the conveyor is automatically synchronized. The machine also contains a separating stars. One of them is linked chain and gears with a star feeder control object from the conveyor belt, and the other is connected chain and gears with a sprocket wheel return control object on the conveyor belt. TV cameras are placed so that the optical axis is shifted by 120° relative to each other. Against each TV camera mounted lights. The lights consist of a light-diffusing screens and matrix of LEDs. The height and width of the light-diffusing screens is selected from (0,2-0,8)L, where L is the distance between the TV camera and svetorusie is. the crystals, 3 ill.

The invention relates to glass, food and pharmaceutical industries, namely, devices of control of the geometric dimensions and defects of type posichek, chips of glass products (cans, bottles etc).

A device for automatic control of moving objects, containing three video camera (TV camera) and control system. Display cameras is compared with the threshold value of the standard. However, this device actually allows registration only geometrical parameters and does not allow the rejection of control objects for internal defects, which include in particular posacki and chipped on the rim of the glass, and does not automatically rejected, because the motion of the object of control is not associated with the results obtained images. Application N 59-246769, IMS N 6, page 8, issue 082, 1996, MCI G 01 B 11/24.

Closest to the claimed device, selected as a prototype, is "measuring machine" in patent application JP 1-291110A, 22.11.1989. This device has a rotary table with periodic shutdown, mounted coaxially with it the disk table, torque controlled product, rollers, subtwo image processing, sorting device. The disadvantage of this machine is the low productivity associated with periodic stopping of the rotating table and the additional rotation of the test object.

The inventive device solves the problem of increasing the performance of simultaneous control of both the geometric and mechanical defects (posichek, chips, cracks) while ensuring high quality and accuracy of sorting. For this purpose, the design of the sorting machine of moving objects, comprising a frame, a frame, a rotary table with motor, sprocket feed control object from the conveyor belt, sprocket, return the control object on the conveyor belt, a TV camera located in the control zone, the processing device mappings and sorting device, and the motor speed of the rotating table and the motor speed of the conveyor is automatically synchronized, control and screening machine further comprises separating the stars, and one of them is linked chain and gears with a star feeder control object from the conveyor belt, and another connected chain and gears with an asterisk return the optical axis is shifted by 120orelative to each other, and in front of every TV camera mounted luminaires, consisting of a light-diffusing screens and radiation sources, which are the matrix of LEDs operating in the pulse mode and located at a fixed distance from the light diffusing screen, and the height and width of the light-diffusing screens is selected from (0,2 - 0,8)L, where L is the distance between the TV camera and a light-diffusing screen. Gear ratio the gear and chain transmission between the rotating table, asterisks supply and return and dividing by asterisks selected so that the glass are controlled area at a certain speed and interval, the magnitude of which is at a certain time of exposure should provide high accuracy measurements of the geometry and location of defects. When changing the interval between the objects of control in the lower side of the image, two different objects can get in the processing of a single video signal, which will cause the inaccuracy of the control, the increase of this interval will reduce the performance. In the synchronous operation of the machine and conveyor glassware time to take contam 120oprovides resolution of tclobject from different angles, which improves the quality of sorting and precision control. The design of the illuminator provides creating a luminous background, on which the TV camera get image as a contrasting outline. Contrast contour provides its finding the image processing program. Contrast contour can be obtained on the background with uniform illumination and brightness. Uniform illumination of the screen is achieved by the arrangement of the matrix of LEDs at a fixed distance from the screen and the execution screen of frosted glass. The unevenness of brightness of the background on the field of view of the TV camera must be no more than 15%, so the program confidently discerned the contours of the image of the test object. In addition, you must provide the local unevenness of brightness of the background is not more than 2%, otherwise the program will perceive it as chips. To mitigate the impact of General and local non-uniformity of the brightness of the illuminators are located at the greatest possible distance from the test object outside the focusing lens of the TV camera, and the sizes of the light-diffusing screens height and width, is selected depending on the distance L between them and the TV cameras the clusters differ from image defects tclobject. When you change these ratios both in big, and in the lower side does not provide requirements for General and local background brightness light-diffusing screens, which leads to contrastate image of the contour of the glass and to the impossibility of process control machine. The lights operate in pulsed mode. Lasting glow lighting can affect the duration of exposure. Since glassware is moving in the control zone with some speed, time, illumination should be such that this speed does not affect the appearance of the image is not blurred. The machine has adjustable height and wheels to move and features a removable cover. Design control-sorting machine is a compact, easily transported and conveniently mounted device that attaches to the conveyor belt. The wheels of the machine is fixed along the desired move.

In Fig. 1 shows a General view of the device.

In Fig. 2 shows a view of the device from above.

In Fig. 3 shows a view of the sprocket feed from the bottom.

The machine consists of a frame 1 which is mounted on the frame 2 adjustable witura 7, the motor 8, the gear 9, the gear 10, which transmits the rotation from the electric motor 8 on the axis 11 of the rotary table 12, the relief device consisting of a valve 13 and pnevmatikatos 14, the control unit 15, the machine is closed by a cover 16. In Fig. 2 shows the motor of the conveyor 17, the conveyor belt 18 with the attached glass 19, the rotating table 12 by means of a chain drive 20 rotates sprocket feed 21 and return 22 engaged in the supply of glass 19 with the conveyor belt 18 in the machine for control and return them after sorting, the chain 23 and gear 24 transmits rotation from the sprocket feeder 21 to the first additional sprocket 25 and chain gear 26 and gear 27 transmit the rotation of the second sprocket 28. In the control zone has three TV camera 29, shifted relative to each other on the 120oopposite each TV camera 29 is installed illuminators 30; 31 - tray to reset defective products. Asterisk submission 21 (see Fig. 3) has teeth 32 with the bases 33, with the possibility of deviation in the direction opposite to the rotation of the sprocket feeder 21, the axis 34 and the return element of the teeth 32 to its original position by spring 35, which cushion the legs 3 set the height level of the conveyor belt 18 and it attaches to the conveyor by means of mechanical and electrical cable connections. Connect the pneumatic power supply to the device reset 13, 14. The power leads machine control in the ready state. Are download PC 5 and include the start button of the machine. Automatically synchronizes the speed of the electric machine 8 with the motor speed of the conveyor 17, this prevents the accumulation of glass at the entrance to the machine. Moving the rotating table 12, the sprocket feed 21 and return 22 comes from the engine 8 through the gear 9 and gear 10 on the axis 11 of the rotary table 12. The linear speed of the rotating table 12 is calculated by the formula:

Varticle=VtoLarticle/Lto< / BR>
where: Vto- the conveyor speed;

Lto- the distance between the glassware on the conveyor;

Larticle- the distance between the glass on the rotating table.

From the axis 11 through a chain drive 20, the rotation is transmitted to the sprocket feed 21 and return 22, and with the sprocket feed 21 and return 22 through a chain 23, 26 and gears 24, 27 on the first 25 and second 28 separating asterisks, respectively. The sprocket 21 captures glass 19 with the conveyor belt 18 and supplies them to the first dividing the sprocket 25, she scatters them up to speed wrestemania cycle control. Monitoring and recording parameters glassware perform three TV camera 29, the axis of which is offset with respect to each other on the 120o. Each TV camera 29 is building its image on the background of the illuminator 30. The radiation source illuminators 30 is a matrix of LEDs operating in the pulse mode for uniform illumination. When glass 19 in the field of the first illuminator 30 is the record of his first image TV camera 29 and processing its signal. Next, with time shifting is the recording and processing of the second and third video signals from the TV camera 29. With the same shift work illuminators 30, they are included at the time of obtaining the image in the TV frame. Offset glass 19 during this time, in the control zone has virtually no effect on the measurement accuracy, thus pulsed light helps to avoid blurring of the contour in the image. The signals from the TV camera 29 is processed in the PC 5, where they are compared with the benchmark. In case of monitored parameters for the specified tolerance, recorded at least one TV camera, in the time of occurrence of defective products in the area of the ejection automatically start valve 13, the pulse vozdvigayutsya second dividing sprocket 28, which slows down its movement to the speed of the conveyor and sprocket return 22 returns glassware back to the conveyor belt. For example, when sorting mayonnaise jars all three cameras recorded them with a lag of 20 MS, with the same shift worked illuminators. The exposure time is not more than 125 μs. Measurement of geometrical parameters and the defect occurs during the movement of the glassware on the conveyor belt at a speed of 350 mm/s, which leads to an offset of about 7.5 mm for the period of one television frame. The pulse mode of lighting is characterized by the lighting time is about 120 μs. It was established experimentally that the displacement of the glass during the time of illumination, equal to 120 μs, is 0,035 mm and has virtually no effect on the measurement accuracy. The dimensions of the light-diffusing screen h mm, the distance between the led matrix 35 mm, and from it to the TV camera 320 mm Thanks to non-stop motion of the rotating table products quality control occurs at a high speed. The machine provides control 150 or more glass products per minute in continuous operation of the conveyor. Automatic synchronization of the speed of the motor with scarabino the entire system. The universal machine, by readjusting it can be used for control of various diameter and height of the glass, and also to perform incoming inspection of glass filling lines. The proposed control screening machine easily otstykovyvatsya from the conveyor and rolled to install in another location or for repair without interruption of the main technological equipment.

1. Control screening machine comprising a frame, a frame, a rotary table with motor, sprocket feed control object from the conveyor belt, sprocket, return the control object on the conveyor belt, a TV camera located in the control zone, the processing device mappings and sorting device, and the motor speed of the rotating table and the motor speed of the conveyor is automatically synchronized, characterized in that it further comprises separating the stars, and one of them is linked chain and gears with a star feeder control object from the conveyor belt, and another connected chain and gears with a sprocket wheel return control object on the conveyor belt, located in the control zone the TV camera mounted luminaires, consisting of a light-diffusing screens and radiation sources, which are the matrix of LEDs operating in the pulse mode and located at a fixed distance from the light diffusing screen, and the height and width of the light-diffusing screens is selected from (0,2 - 0,8)L, where L is the distance between the TV camera and a light-diffusing screen.

2. Machine under item 1, characterized in that the frequency of control objects on the rotating table is equal to not less than two diameters of the test object.

3. Machine under item 1, characterized in that the distance L is greater than the focal length of a TV camera.

4. Machine under item 1, characterized in that the light-diffusing screens made of milk glass.

5. Machine under item 1, characterized in that the fixed distance between the matrix of LEDs and a light-diffusing screen choose from a range of 35 - 50 mm

6. Machine under item 1, characterized in that it has adjustable height and wheels to move.

7. Machine under item 1, characterized in that it has a removable cover.

 

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