Device matched with detection wheel and used for calibrating cigarette appearance detector

Abstract

The utility model discloses a device matched with a detection wheel and used for calibrating a cigarette appearance detector, a cigarette making and tipping unit comprises the detection wheel, the cigarette appearance detector is arranged on one side of the detection wheel, the device comprises a calibration tool, the calibration tool comprises a calibration body, and a calibration flat plate is detachably mounted in a mounting groove in the top of the calibration body; extension plates are arranged at the left end and the right end of the top of the calibration body respectively, two positioning shafts are arranged at the bottom of the calibration body, each positioning shaft extends in the left-right direction and is detachably connected with the calibration body, and an avoiding groove which extends in the left-right direction and is used for avoiding the calibration rod is formed in the bottom of the calibration body. The receding groove is located between the two positioning shafts and communicated with the mounting groove, and the front positioning shaft, the calibration rod and the rear positioning shaft are matched with three adjacent cigarette grooves in the circumference of the detection wheel respectively. Compared with the prior art, the cigarette appearance detector calibration device has the advantage that the cigarette appearance detector is calibrated.

Description

Technical Field

[0001] This utility model relates to a calibration device for cigarette production equipment, and more particularly to a device for calibrating a cigarette appearance detector that is adapted to a detection wheel. Background Technology

[0002] Visual inspection of cigarette appearance is currently the mainstream technology. The effectiveness of visual inspection depends on the quality of the images captured by the detector. The main factors affecting image quality are: variations in the brightness of the light source used for taking the picture, and variations in the camera's own parameters.

[0003] Currently, in the cigarette production process, visual technology-based cigarette appearance detectors are installed on the cigarette-making and pressing units. These detectors are located on the outside of the detection wheel of the unit and are used to visually inspect the cigarettes in the cigarette slots on the wheel. However, after prolonged use, the brightness of the light source of the cigarette appearance detector may change; parameters such as the object distance and white balance of the camera lens may also change. Currently, there is no device to calibrate the parameters of the cigarette appearance detector itself, which affects the image quality captured by the detector and consequently the accuracy of the cigarette appearance inspection results, reducing the precision of the inspection. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for calibrating a cigarette appearance detector that is compatible with a detection wheel, so as to calibrate the cigarette appearance detector itself and ensure the accuracy of the cigarette appearance detector in detecting the appearance of cigarettes.

[0005] This utility model is achieved through the following technical solution:

[0006] A device for calibrating a cigarette appearance detector adapted to a detection wheel is disclosed. The cigarette rolling unit includes a detection wheel rotatably mounted on a frame. A cigarette appearance detector is provided on one side of the detection wheel. The cigarette appearance detector performs appearance inspection on the cigarettes in the cigarette slots on the detection wheel. The device includes a calibration fixture, which includes a calibration body. The top of the calibration body has a mounting groove for detachably mounting a calibration plate. The left and right ends of the top of the calibration body are respectively provided with horizontally extending extension plates. The bottom of the calibration body has two positioning shafts arranged front and back. Each positioning shaft extends in the left and right direction and is detachably connected to the calibration body. The bottom of the calibration body has a left and right extending clearance groove for avoiding a calibration rod. The clearance groove is located between the two positioning shafts and communicates with the mounting groove. The front positioning shaft, the calibration rod, and the rear positioning shaft respectively match three adjacent cigarette slots on the circumference of the detection wheel.

[0007] As a preferred embodiment of the above-mentioned device, the detection wheel includes a detection wheel body, a smoke-receiving ring protruding outward from the outer surface of the detection wheel body, multiple smoke grooves evenly distributed along the circumference of the smoke-receiving ring, flanges at both ends of the detection wheel body along the axial direction, and limiting caps on the inner sides of the left and right flanges respectively. Soft pads are detachably connected to the ends of the left and right extension plates of the calibration fixture. The calibration fixture is embedded between the two flanges of the detection wheel and abuts against the inner sides of the two flanges through the two soft pads.

[0008] As a preferred embodiment of the above-mentioned device, the soft pad is connected to the end of the extension plate by means of a screw connection, and the soft pad has a countersunk hole on the outside for the screw head to be recessed.

[0009] As a preferred embodiment of the above-mentioned device, the positioning shaft and the calibration body are connected by screws, and the bottom of the positioning shaft has a countersunk groove for the screw head to sink into.

[0010] As a preferred embodiment of the above-mentioned device, the mounting groove of the calibration body is a rectangular groove, and threaded holes are opened at the four corners of the bottom wall of the mounting groove. Four screws are passed through the through holes at the four corners of the calibration plate and tightened into the four threaded holes at the bottom wall of the mounting groove to realize the connection between the calibration plate and the calibration body.

[0011] As a preferred embodiment of the above-mentioned device, the top surface of the calibration plate is lower than the top surface of the calibration body.

[0012] As a preferred embodiment of the above-mentioned device, the top of the calibration body has operating grooves on the front and rear sides of the mounting groove, the operating grooves are connected from front to back, and the bottom wall of the operating groove is lower than the top surface of the calibration plate.

[0013] As a preferred embodiment of the above-mentioned device, the bottom of the extension plates at both ends of the calibration body is provided with left and right extending clearance grooves, and the clearance grooves of the two extension plates are respectively connected to the clearance groove at the bottom of the calibration body.

[0014] As a preferred embodiment of the above-mentioned device, the calibration plate is a white ceramic plate or a warp and weft plate with horizontal and vertical scales on its surface.

[0015] This invention has the following advantages over the prior art:

[0016] This utility model provides a device for calibrating a cigarette appearance detector that is adapted to a detection wheel. By setting a calibration fixture to be clamped and installed between the two flanges of the detection wheel, and selectively installing calibration rods and various calibration plates on the calibration fixture, the device can calibrate the relevant parameters of the cigarette appearance detector itself, thereby ensuring the accuracy of the cigarette appearance detector in detecting the appearance of cigarettes. Attached Figure Description

[0017] Figure 1 This is a perspective view of the calibration fixture of this utility model.

[0018] Figure 2 This is a perspective view of the calibration fixture of this utility model from another angle.

[0019] Figure 3 This is a three-dimensional exploded view of the calibration fixture of this utility model.

[0020] Figure 4 This is a perspective view of the calibration fixture of this utility model assembled with a white ceramic plate.

[0021] Figure 5 This is a three-dimensional view of the calibration fixture and the warp and weft plates assembled according to this utility model.

[0022] Figure 6 This is a perspective view of the calibration fixture and testing wheel assembly of this utility model.

[0023] Figure 7 yes Figure 6 3D exploded view.

[0024] Figure 8 This is a schematic diagram of the installation structure of the detection wheel of this utility model.

[0025] Numbered in the diagram: 1 Frame; 2 Detection wheel; 3 Cigarette appearance detector; 4 Cigarette slot; 5 Mounting groove; 6 Threaded hole; 7 Cigarette; 8 Operating groove; 9 White ceramic plate; 10 Warp and weft plate; 11 Positioning shaft; 12 Countersunk groove; 13 Calibration rod; 14 Clearance groove; 15 Extension plate; 16 Clearance groove; 17 Detection wheel body; 18 Cigarette receiving ring; 19 Flange; 20 Limiting cap; 21 Soft gasket; 22 Countersunk hole; 23 Calibration body. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0027] See Figures 1 to 8This embodiment discloses a device for calibrating a cigarette appearance detector adapted to a detection wheel. The cigarette rolling unit includes a detection wheel 2 rotatably mounted on a frame 1. A cigarette appearance detector 3 is provided on one side of the detection wheel 2. The cigarette appearance detector 3 performs appearance inspection on the cigarettes 7 in the cigarette groove 4 on the detection wheel 2. The device includes a calibration fixture, which includes a calibration body 23. The top of the calibration body 23 has a mounting groove 5 for detachably mounting a calibration plate. The mounting groove 5 is a rectangular groove, and the four corners of the bottom wall of the mounting groove 5 have threaded holes 6. Four screws are passed through the four corner holes of the calibration plate and tightened into the four threaded holes 6 on the bottom wall of the mounting groove 5 to connect the calibration plate and the calibration body 23. The top surface of the calibration plate is lower than the top surface of the calibration body 23. The top of the calibration body 23 has operating grooves 8 on the front and rear sides of the mounting groove 5, respectively. The operating grooves 8 are continuous from front to back, and the bottom wall of the operating grooves 8 is lower than the top surface of the calibration plate. Since the top surface of the calibration plate is lower than the top surface of the calibration body 23 after installation, operating grooves are provided on the front and rear sides of the calibration body 23. These two operating grooves 8 facilitate the placement and removal of the calibration plate. The calibration plate includes two types: a white ceramic plate 9 and a warp and weft plate 10 with horizontal and vertical scales on its surface.

[0028] The calibration body 23 has two positioning shafts 11 arranged in a front-to-back pattern at its bottom. Each positioning shaft 11 extends in the left-right direction and is detachably connected to the calibration body 23. The positioning shafts 11 and the calibration body 23 are connected by screws. The bottom of the positioning shafts 11 has countersunk grooves 12 for the screw heads to sink into. The bottom of the calibration body 23 has left-right extending clearance grooves 14 to avoid the calibration rod 13. The clearance grooves 14 are located between the two positioning shafts 11 and communicate with the mounting grooves 5. The bottoms of the extension plates 15 at both ends of the calibration body 23 have left-right extending clearance grooves 16, which communicate with the clearance grooves 14 at the bottom of the calibration body 23. The front positioning shaft 11, the calibration rod 13, and the rear positioning shaft 11 respectively match the three adjacent smoke slots 4 on the circumference of the detection wheel 2.

[0029] The detection wheel 2 includes a detection wheel body 17, with an outwardly protruding smoke-receiving ring 18 around the outer side of the detection wheel body 17. Multiple smoke grooves 4 are evenly distributed around the circumference of the smoke-receiving ring 18. The detection wheel body 17 has flanges 19 at both ends along the axial direction, and limiting caps 20 are provided on the inner sides of the left and right flanges 19, respectively. The limiting caps 20 on the inner sides of the two flanges 19 limit the two ends of the cigarette stick 7. The top of the calibration body 23 has horizontally outwardly extending extension plates 15 at the left and right ends, respectively. The ends of the two extension plates 15 of the calibration fixture are detachably connected to soft gaskets 21. The calibration fixture is embedded between the two flanges 19 of the detection wheel 2 and abuts against the inner sides of the two flanges 19 through the two soft gaskets 21. The soft gaskets 21 are connected to the ends of the extension plates 15 by screws. The soft gaskets 21 have countersunk holes 22 on the outer side for the screw heads to be recessed. By setting a removable soft pad 21, the detection wheel 2 can be protected from damage to the flange 19 of the detection wheel 2, and the soft pad 21 can be easily replaced.

[0030] During installation, select a soft pad 21 of appropriate thickness so that the soft pads 21 at the ends of the two extension plates 15 can be pressed tightly against the inner sides of the two flanges 19 on the detection wheel 2, and the calibration fixture is clamped between the two flanges 19. The height difference between the bottom surface of the calibration body 23 and the bottom surface of the extension plate 15 is designed to avoid the limiting cap 20 on the inner side of the flange 19.

[0031] When calibrating the light source brightness of the cigarette appearance detector 3, a calibration rod 13 is required. To ensure the consistency and stability of the light source brightness, a matte ceramic standard rod similar to cigarette paper material is used for calibration. During calibration, the calibration rod 13 is first inserted into a groove 4 of the detection wheel 2. Then, the calibration fixture is installed on the detection wheel 2, with the two soft pads 21 of the fixture secured between the two flanges 19 of the detection wheel 2, and the two positioning shafts 11 embedded in the two adjacent grooves 4 on either side of the calibration rod 13. This completes the installation of the calibration fixture and the detection wheel 2. The detection wheel 2 is then manually rotated, causing it to rotate and drive the calibration fixture to rotate as well, until the calibration rod 13 is positioned at the center of the camera's field of view in the cigarette appearance detector 3. An image of the area around the calibration rod 13 is captured by the camera, and its average grayscale value is calculated as the reference for grayscale adjustment. Then, the knob of the light source drive system of the cigarette appearance detector 3 is adjusted to match the reference grayscale value, thus achieving the calibration of the light source brightness.

[0032] When calibrating the object distance of the camera lens of the cigarette appearance detector 3, a theodolite 10 is required. Place the theodolite 10 in the mounting groove 5 of the calibration body 23 and tighten it with four screws. Install the calibration fixture on the detection wheel 2 in the same manner, with the graduations on the theodolite 10 facing outwards. Manually rotate the detection wheel 2, causing it to rotate and thus rotating the calibration fixture, until the theodolite 10 is centered in the field of view of the cigarette appearance detector 3's camera. Adjust the position of the camera lens so that the image captured by the lens on the theodolite 10 matches the standard image. At this point, the object distance is the standard object distance, allowing for precise adjustment of the camera position of the cigarette appearance detector 3, thus ensuring the accuracy of subsequent object distance measurements.

[0033] When it is necessary to calibrate the white balance parameters of the cigarette appearance detector 3, a white ceramic plate 9 is required as a calibration plate. Remove the aforementioned warp and weft plate 10 and replace it with the white ceramic plate 9. Take a picture of the white ceramic plate 9 in the same manner to obtain its white balance parameter value. Use this white balance parameter value as the reference for white balance adjustment. Adjust the white balance parameters of the cigarette appearance detector 3 until they are adjusted to the white balance reference value; this completes the calibration of the white balance parameters.

[0034] The calibration fixture provided in this embodiment can be selectively used in conjunction with the calibration rod 13, the white ceramic plate 9, and the warp and weft plate 10 to accurately calibrate the relevant parameters and object distance of the cigarette appearance detector 3 itself, thereby ensuring the continuous stability of the cigarette appearance detector 3 in use and thus ensuring its detection quality of the appearance of the cigarette 7.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for calibrating a cigarette appearance detector adapted to a detection wheel, the cigarette rolling unit including a detection wheel rotatably mounted on a frame, a cigarette appearance detector being provided on one side of the detection wheel, the cigarette appearance detector performing appearance inspection on the cigarettes in the cigarette groove on the detection wheel, characterized in that: The device includes a calibration fixture, which includes a calibration body. The top of the calibration body has a mounting groove for detachably mounting a calibration plate. The left and right ends of the top of the calibration body are respectively provided with horizontally extending extension plates. The bottom of the calibration body has two positioning shafts arranged in a front-to-back direction. Each positioning shaft extends in the left-to-right direction and is detachably connected to the calibration body. The bottom of the calibration body has a left-to-right extending clearance groove for avoiding the calibration rod. The clearance groove is located between the two positioning shafts and communicates with the mounting groove. The front positioning shaft, the calibration rod, and the rear positioning shaft respectively match three adjacent smoke slots on the circumference of the detection wheel.

2. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 1, wherein the detection wheel includes a detection wheel body, a protruding cigarette-receiving ring is provided around the outer surface of the detection wheel body, a plurality of cigarette grooves are evenly distributed along the circumference of the cigarette-receiving ring, flanges are provided at both ends of the detection wheel body along the axial direction, and limiting caps are provided on the inner sides of the left and right flanges respectively, characterized in that: The left and right extension plates of the calibration fixture are detachably connected to soft pads. The calibration fixture is embedded between the two flanges of the detection wheel and abuts against the inner side of the two flanges through the two soft pads.

3. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 2, characterized in that: The soft gasket is connected to the end of the extension plate by a screw connection, and the soft gasket has a countersunk hole on the outside for the screw head to be recessed.

4. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 1, characterized in that: The positioning shaft is connected to the calibration body by screws, and the bottom of the positioning shaft has a countersunk groove for the screw head to sink into.

5. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 1, characterized in that: The mounting groove of the calibration body is a rectangular groove. There are threaded holes at the four corners of the bottom wall of the mounting groove. Four screws are passed through the holes at the four corners of the calibration plate and tightened into the four threaded holes at the bottom wall of the mounting groove to connect the calibration plate and the calibration body.

6. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 1, characterized in that: The top surface of the calibration plate is lower than the top surface of the calibration body.

7. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 6, characterized in that: The top of the calibration body has operating grooves on both the front and rear sides of the mounting groove. The operating grooves are connected front and back, and the bottom wall of the operating groove is lower than the top surface of the calibration plate.

8. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 1, characterized in that: The bottom of the extension plates at both ends of the calibration body has left and right extending clearance grooves, and the clearance grooves of the two extension plates are connected to the clearance grooves at the bottom of the calibration body.

9. The device for calibrating a cigarette appearance detector adapted to a detection wheel as described in claim 1, characterized in that: The calibration plate is a white ceramic plate or a warp and weft plate with horizontal and vertical scales on its surface.

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