Lead detection method for paper tube firework lump

Abstract

The invention discloses a lead detection method for a paper tube firework lump, which comprises the following steps of: clamping the paper tube firework lump by using a deflectable clamping device to change the shape of the paper tube firework lump, taking pictures of the tube orifices of the paper tube firework lump by using a picture taking detection device under different shapes of the paper tube firework lump to obtain image data of the tube orifice position of each paper tube; a photographing detection device is used for positioning according to the image data of the pipe opening position of each paper pipe, the interior of each paper pipe is photographed to obtain image data of the lead, data processing and comparative analysis judgment are conducted according to the image data of the lead in each paper pipe under different shapes of the paper pipe firework lump, and whether the paper pipe firework lump is qualified or not is determined. The states of the enclosing leads and the connecting leads in the paper tubes on the two sides of the paper tube firework lump before and after the paper tube firework lump inclines are different, and the problem that the leads in the paper tubes on the two sides are possibly overlapped up and down and cannot be correctly detected can be solved through photographing. Compared with the prior art, the method has a better detection effect.

Description

Technical Field

[0001] This invention pertains to testing methods for fireworks products, specifically a method for testing the fuse of a paper tube fireworks pyrotechnic. Background Technology

[0002] Paper tube fireworks production has largely achieved semi-automated production lines. Paper tube fireworks are an intermediate product in the production process, and their quality is crucial to the final product. While existing methods for detecting paper tube fireworks have achieved automatic detection, in practice, the specifications and types of paper tube fireworks frequently change during production. Different specifications and types of paper tube fireworks vary in tube diameter, length, quantity, and paper thickness. Existing technology (CN117553640)... A) When testing paper tube fireworks of different diameters, different lead extrusion plates on the deformation components need to be replaced to accommodate the different vertical positions of the outer shroud. This results in numerous parts and complicated adjustments when producing different products. Furthermore, when testing paper tube fireworks of the same inner diameter, variations in paper thickness lead to significant differences in the outer diameter (existing paper tube winding machines can only set the number of paper layers). For example, a paper tube with an inner diameter of 30mm has a designed outer diameter of 34.5mm, but the actual value varies between 34.1mm and 35mm. This causes the actual position of the outer shroud, which should be in the same vertical position, to differ. Since the continuous protrusions of the lead extrusion plate on the deformation component are fixed, when the outer shroud of the paper tube fireworks is squeezed or stretched under these conditions, the continuous protrusions of the lead extrusion plate cannot ideally correspond to the outer shroud, resulting in unsatisfactory squeezing or stretching effects. This prevents the lead inside the fireworks tube from moving and creating a dynamic deformation effect, thus affecting the test results. Summary of the Invention

[0003] The purpose of this invention is to provide a method for detecting the fuse of paper tube fireworks that has better detection results.

[0004] The technical solution adopted to achieve the purpose of this invention is as follows: The present invention provides a method for detecting the lead wire of a paper tube firework pyrotechnic, comprising: clamping the paper tube firework pyrotechnic with a deflectable clamping device to change its shape; under different shapes of the paper tube firework pyrotechnic, taking pictures of the paper tube openings of the paper tube firework pyrotechnic with a photographic detection device to obtain image data of the position of each paper tube opening; using the photographic detection device to locate and take pictures of the inside of each paper tube according to the image data of the position of each paper tube opening to obtain image data of the lead wire; and performing data processing and comparative analysis based on the image data of the lead wire inside each paper tube under different shapes of the paper tube firework pyrotechnic to determine whether the paper tube firework pyrotechnic is qualified.

[0005] The photographic detection device obtains image data of the positions of each paper tube opening by photographing all the paper tubes of the paper tube firework pyrotechnica simultaneously, or by photographing each paper tube of the paper tube firework pyrotechnica one by one.

[0006] The photographic detection device includes a positioning camera that uses a wide-angle camera to photograph and position the opening of the paper tube of the paper tube firework, and a detection camera that uses a non-wide-angle camera to photograph the interior of each paper tube; or a zoom camera that first photographs and positions the opening of the paper tube of the paper tube firework, adjusts the focus, and then photographs the interior of each paper tube.

[0007] The photographic detection device includes a housing, two positioning cameras arranged vertically on the housing, and one or more detection cameras or a zoom camera located between the two positioning cameras.

[0008] The photographic detection device takes pictures according to the following path: When the paper tube firework is deformed, only take pictures of the two rows of paper tubes on both sides of the firework as they move upwards or downwards one by one. When the paper tube fireworks are not deformed, start from the outermost row of paper tubes and move them one by one upwards to take pictures. After reaching the top paper tube, move it horizontally to the adjacent paper tube and then move it downwards one by one to take pictures. Repeat this process to take pictures of all the paper tubes.

[0009] The shape of the paper tube firework pyrotechnic includes: The clamping device first deflects at an angle in one direction, then deflects at an angle in the opposite direction, and then returns to its original position in different shapes; Or the different shapes of the clamping device when it first deflects to one direction by an angle and then returns to its original position; Or the different shapes when the clamping device is stationary and then deflected in one direction by an angle; Or the different shapes when the clamping device is stationary and then deflected by an angle in one direction and then by an angle in the opposite direction.

[0010] The numerical range of the angle is 1 to 10°. Beneficial effects

[0011] Compared with the prior art, the present invention: 1. The invention uses a deflectable clamping device to change the shape of the paper tube firework. Compared with the prior art, it can ignore the situation where the outer diameter of the paper tube firework is different due to the large variation in paper thickness, which makes the effect of the lead wire movement unsatisfactory. The invention can adapt to all the tube diameter differences of the paper tube firework. 2. This invention adopts a detection method of positioning first and then taking pictures, which can adapt to the detection of paper tube fireworks of different specifications and types. It will not cause inaccurate pictures due to differences in the inner diameter of the paper tube, the thickness of the paper tube, or deformation of the fireworks, which would seriously affect the accuracy of the analysis and detection results. This greatly improves the accuracy of the detection results.

[0012] The technical solution of the present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the paper tube firework pellet deformation device in this invention.

[0015] Figure 3 These are views of the paper tube firework pellet deformation device from different angles.

[0016] Figure 4 This is a schematic diagram of the driving component in this invention.

[0017] Figure 5 These are schematic diagrams of different structures of the driving components.

[0018] Figure 6 This is a schematic diagram of the paper tube firework pellet photographic detection device of the present invention.

[0019] Figure 7 This is the first working state of the paper tube firework pellet deformation device.

[0020] Figure 8 This is the second working state of the paper tube firework pellet deformation device.

[0021] Figure 9 This is the third working state of the paper tube firework pellet deformation device.

[0022] Figure 10 This is a schematic diagram of the paper tube firework mass during the photographic detection process of this invention.

[0023] Figure 11 This is a schematic diagram of the photographic detection device in this invention.

[0024] Figure 12 This is a schematic diagram of the movement mode of the photographic detection device during the photographic detection process of the present invention. Detailed Implementation

[0025] The present invention provides a method for detecting the lead wire of a paper tube firework pyrotechnic, comprising: clamping the paper tube firework pyrotechnic with a deflectable clamping device to change its shape; under different shapes of the paper tube firework pyrotechnic, taking pictures of the paper tube openings of the paper tube firework pyrotechnic with a photographic detection device to obtain image data of the position of each paper tube opening; using the photographic detection device to locate and take pictures of the inside of each paper tube according to the image data of the position of each paper tube opening to obtain image data of the lead wire; and performing data processing and comparative analysis based on the image data of the lead wire inside each paper tube under different shapes of the paper tube firework pyrotechnic to determine whether the paper tube firework pyrotechnic is qualified.

[0026] The photographic detection device obtains image data of the positions of each paper tube opening by photographing all the paper tubes of the paper tube firework pyrotechnica simultaneously, or by photographing each paper tube of the paper tube firework pyrotechnica one by one.

[0027] The photographic detection device includes a positioning camera that uses a wide-angle camera to photograph and position the opening of the paper tube of the paper tube firework, and a detection camera that uses a non-wide-angle camera to photograph the interior of each paper tube; or a zoom camera that first photographs and positions the opening of the paper tube of the paper tube firework, adjusts the focus, and then photographs the interior of each paper tube.

[0028] The photographic detection device takes pictures according to the following path: When the paper tube firework is deformed, only take pictures of the two rows of paper tubes on both sides of the firework as they move upwards or downwards one by one. When the paper tube fireworks are not deformed, start from the outermost row of paper tubes and move them one by one upwards to take pictures. After reaching the top paper tube, move it horizontally to the adjacent paper tube and then move it downwards one by one to take pictures. Repeat this process to take pictures of all the paper tubes.

[0029] The shape of the paper tube firework pyrotechnic includes: The clamping device first deflects at an angle in one direction, then deflects at an angle in the opposite direction, and then returns to its original position in different shapes; Or the different shapes of the clamping device when it first deflects to one direction by an angle and then returns to its original position; Or the different shapes when the clamping device is stationary and then deflected in one direction by an angle; Or the different shapes when the clamping device is stationary and then deflected by an angle in one direction and then by an angle in the opposite direction.

[0030] The numerical range of the angle is 1 to 10°.

[0031] See Figure 1The lead wire detection device for paper tube fireworks of the present invention includes a frame 1, a conveyor belt device 5 mounted on the frame 1, a paper tube fireworks deformation device 2 mounted at one end of the conveyor belt device 5, and a photographic detection device 3 corresponding to the deformation device 2.

[0032] See Figure 1 , Figure 3 The deformation device 2 includes a gantry baffle assembly 201 and a shaping assembly 202 located on both sides of the support end of the conveyor belt device 5.

[0033] See Figure 1 , Figure 2 , Figure 3 The gantry baffle assembly 201 includes a gantry 201A, a gantry baffle 201B mounted on the gantry 201A and driven by a gantry baffle motion drive 201D to move up and down along the gantry 201A, and a gantry baffle tilting plate 201C located inside the gantry baffle 201B and capable of swinging. The upper end of the gantry baffle tilting plate 201C is hinged to the drive assembly 6 located at the top of the gantry baffle 201B, and the lower end of the gantry baffle tilting plate 201C is hinged to the gantry baffle 201B through a rotary connector 4. The gantry baffle motion drive 201D is a cylinder (or a linear screw motor or other mechanism capable of linear reciprocating motion). The gantry baffle tilting plate 201C rotates around the rotary connector 4 as the rotation center under the drive of the drive assembly 6.

[0034] The gantry baffle motion drive component 201D is connected to the gantry 201A via a fixed seat 201E, and the gantry baffle 201B is mounted on the piston rod of the gantry baffle motion drive component 201D.

[0035] See Figure 1 , Figure 2 The shaping position assembly 202 includes a shaping drive component 202C, a shaping fixing plate 202A connected to the shaping drive component 202C, and a shaping tilting plate 202B located inside the shaping fixing plate 202A and corresponding to the gantry tilting plate 201C, which is capable of swinging. The upper end of the shaping tilting plate 202B is hinged to the drive component 6 located at the top of the shaping fixing plate 202A, and the lower end of the shaping tilting plate 202B is hinged to the shaping fixing plate 202A through a rotating connector 4. The shaping tilting plate 202B rotates around the rotating connector 4 as the rotation center under the drive of the drive component 6.

[0036] The shaping drive component 202C is mounted on the inspection frame 5 via a mounting bracket 202D (see...). Figure 1 , Figure 2Its direction of motion is horizontal and perpendicular to the direction of motion of the conveyor belt device 5; the shaping drive component 202C adopts a cylinder (or a linear screw motor or other mechanism that can realize linear reciprocating motion), and the shaping fixing plate 202A is installed on the piston rod of the shaping drive component 202C.

[0037] See Figure 4 The drive assembly 6 includes a drive member 601 fixed on the gantry baffle 201B and the shaping fixing plate 202A respectively, and a rotary conversion assembly 602 connected to the drive member 601; the drive member 601 is a linear screw motor; the rotary conversion assembly 602 includes a universal damping ball joint assembly and a guide rail slider assembly connected to the universal damping ball joint assembly. The universal damping ball joint assembly includes a ball joint 602A connected to the screw 601A in the drive member 601 and a damping seat 602B that cooperates with the ball joint 602A. The guide rail slider assembly includes a slider 602D fixed on the damping seat 602B by a connector 602C and a guide rail that cooperates with the slider 602D and is fixed on the gantry tilting plate 201C and the shaping tilting plate 202B respectively.

[0038] See Figure 8 The drive assembly 6 may also be a crank-connecting rod mechanism 603, etc.

[0039] The drive component 601 may also be a cylinder or the like that can achieve linear reciprocating motion.

[0040] The rotating connector 4 can be a hinge, or it can be a universal damping ball joint connector, etc.

[0041] See Figure 1 , Figure 6 The photographic detection device 3 is located on the axial front of the end of the conveyor belt device 5, and includes a vertical motion module 301, a horizontal motion module driven by the vertical motion module 301 that can move up and down, and a photographic detection device driven by the horizontal motion module that can move horizontally back and forth.

[0042] The horizontal motion module includes a first horizontal motion module 303 and a second horizontal motion module 302. The photographic detection device includes a main photographic detection device 310 and a secondary photographic detection device 311, which are respectively mounted on the first horizontal motion module 303 and the second horizontal motion module 302 and can move horizontally back and forth.

[0043] The purpose of setting up the first horizontal motion module 303 and the second horizontal motion module 302 is to correspond to the paper tube firework spheres conveyed by the conveyor belt device 5. In order to adapt to the size of the paper tube firework spheres, they can be the same length or one long and one short.

[0044] The vertical motion module 301, the first horizontal motion module 303, and the second horizontal motion module 302 have the same structure. Each includes a base plate 305 with an optical axis 304, a synchronous belt 308 driven by a synchronous motor 306 and a synchronous pulley 307 on the base plate 305, and a slider 309 fixed on the synchronous belt 308 and sliding along the optical axis 304. The base plate 305 in the vertical motion module 301 is connected to the frame 1. The base plates 305 in the first horizontal motion module 303 and the second horizontal motion module 302 are fixed on the slider 309 in the vertical motion module 301. The main imaging detection device 310 and the auxiliary imaging detection device 311 are respectively fixed on the slider 309 in the first horizontal motion module 303 and the second horizontal motion module 302.

[0045] Working principle The paper tube and lead wire testing equipment for paper tube fireworks is equipped with a main control system in actual use. This main control system is used to control the transmission and reception of all program instructions during the actual production and testing process, as well as to display and prompt the test results.

[0046] See Figure 1 , Figure 10 The paper tube fireworks W from the assembly machine is conveyed to the detection position A by the conveyor belt device 5, and the photographic detection device 3 starts the photographic detection process, mainly detecting the state of the side circumference r and the internal connecting s of the paper tube fireworks W inside the paper tube: Process 1: The rotary drive 601 on the gantry baffle assembly 201 extends, causing the gantry tilting plate 201C to deflect to the left by angle α. Simultaneously, the rotary drive 601 on the shaping assembly 202 retracts, causing the shaping tilting plate 202B to deflect by angle α. Subsequently, the shaping drive 202C on the shaping assembly 202 extends, and the paper tube firework ball W to be inspected on the detection position A tilts to the left at angle α under the clamping of the gantry tilting plate 201C and the shaping tilting plate 202B. At this time, the photographic detection device 3 performs the first photographic detection of the state of the inner circumference r and connecting s of each paper tube of the paper tube firework ball W [see...]. Figure 7 , Figure 10 (a)]; Process 2: The rotary drive 601 on the gantry baffle assembly 201 retracts, causing the gantry tilting plate 201C to deflect to the right by angle α. Simultaneously, the rotary drive 601 on the shaping assembly 202 extends, causing the shaping tilting plate 202B to deflect by angle α. The paper tube firework ball W to be inspected on the detection position A tilts to the right at angle α under the clamping of the gantry tilting plate 201C and the shaping tilting plate 202B. At this time, the photographic detection device 3 performs a second photographic inspection of the state of the inner circumference r and connecting s of each paper tube of the paper tube firework ball W [see...]. Figure 8 , Figure 10 (b)]; Process 3: The rotary drive 601 on the gantry baffle assembly 201 performs a restoration action, causing the gantry tilting plate 201C to return to its original position. Simultaneously, the rotary drive 601 on the shaping assembly 202 performs a restoration action, causing the shaping tilting plate 202B to return to its original position. The paper tube firework ball W to be inspected on the detection position A is restored and corrected under the clamping of the gantry tilting plate 201C and the shaping tilting plate 202B. At this time, the photographic detection device 3 performs a third photographic detection of the state of the inner circumference r and connecting s of each paper tube of the paper tube firework ball W [see...]. Figure 9 , Figure 10 (c)]; Process 4: After the photo inspection is completed, the shaping drive 202C on the shaping position assembly 202 performs a slight retraction action, so that the paper tube firework ball W at the inspection position A is in an unclamped state. Then, the gantry baffle motion drive 201D in the gantry baffle position assembly 201 performs an action to open the gantry channel upward together with the gantry baffle 201B and the gantry tilting plate 201C. Then, the shaping drive 202C on the shaping position assembly 202 performs an extension action to push the inspected paper tube firework ball W onto the manual operating table 7. Then, the gantry baffle motion drive 201D in the gantry baffle position assembly 201 performs an action to close the gantry channel downward together with the gantry baffle 201B and the gantry tilting plate 201C, and the next inspection process begins.

[0047] The above-mentioned method of using the gantry baffle assembly 201 and the shaping assembly 202 to clamp the paper tube firework ball and tilt it at an angle 'a' to change its normal rectangular shape before taking a picture is based on (1) the glue between the paper tubes in the paper tube firework ball that has just been pushed out of the assembly machine has not yet solidified, and the paper tube firework ball is still in a loose state. It is easy to deform under the action of external force. Therefore, with the help of the gantry baffle assembly 201 and the shaping assembly 202, it is easy to obtain a tilted state at the set angle 'a'; (2) in processes 1 and 2, the inside of each paper tube is photographed when the paper tube firework ball is tilted (the surrounding and connecting lines may overlap), and in process 3, the inside of the paper tube is photographed when the paper tube firework ball is not tilted. The state of the surrounding and connecting lines inside the paper tubes on both sides of the paper tube firework ball is different before and after tilting. By taking a picture, the problem that the lines inside the paper tubes on both sides may overlap vertically and cause the lines to be unable to be detected correctly can be solved.

[0048] The tilt angle 'a' of the paper tube firework in the above-mentioned photo-taking process 1 and photo-taking process 2 is generally 1 to 10º, with a preferred range of 3 to 5º, based on actual measurement results. The tilt angle 'a' of the paper tube firework in process 1 and process 2 of a single detection process can be the same or different.

[0049] The above-mentioned photo-taking process can also arrange process 3 as step 1, followed by processes 1 and 2. In addition, for the implementation of processes 1 and 2, only one process can be selected to be executed. These changes in the process can be achieved through program adjustments, which will not be elaborated here.

[0050] See Figure 11 The main photographic detection device 310 and the auxiliary photographic detection device 311 in the photographic detection device 3 each include a housing 312, two vertically arranged positioning cameras 313, and two detection cameras 314 located between the two positioning cameras 313. The positioning cameras 313 use wide-angle lenses to photograph the paper tube opening and positioning that are close to the camera, and the shooting range is large. The detection cameras 314 use non-wide-angle lenses to photograph the inside of the paper tube that is far from the camera and only photograph the lead wire to be detected. The two detection cameras 314 have different shooting focal lengths. By selecting detection cameras 314 with different focal lengths, it is possible to adapt to photographing paper tube fireworks of different sizes and specifications.

[0051] The vertical arrangement of the two positioning cameras 313 and the detection camera 314 in the main image detection device 310 and the auxiliary image detection device 311 can adapt to different movement paths. When moving upward, the upper positioning camera 313 and the middle detection camera 314 can be used for operation. When moving downward, the lower positioning camera 313 and the middle detection camera 314 can be used for operation.

[0052] During the taking of photos, under the control of the main control system, when the paper tube firework sphere tilts and deforms, the main photo detection device 310 and the auxiliary photo detection device 311 can... Figure 12 The arrow path shown only takes pictures of the two rows of paper tubes on both sides of the paper tube firework projectile as they move upwards or downwards one by one (the leads inside the paper tubes may overlap in the deformed state); when moving upwards or downwards to take pictures, the positioning camera 313 takes a picture first, the system's vision processing software finds the center position of the paper tube, and then transmits this data to the main control system. The main control system then controls the picture detection device to move to the center position of the paper tube so that the detection camera 314 can take a precise picture [see...]. Figure 12 [(a), (b)]; When the paper tube firework is not deformed, the method of taking a picture is as follows: Figure 12 As shown in (c), start by taking pictures of each paper tube from the bottom up, starting from the outermost column of the paper tube fireworks. After reaching the top paper tube, move horizontally to the adjacent paper tube and then take pictures from top to bottom.

[0053] The above-described embodiment of the shooting method is only one shooting mode; other implementation methods include, but are not limited to: (1) The detection camera 314 can be one or more, or it can be a zoom camera.

[0054] (2) The positioning camera 313 can also be placed separately outside the photo detection device to take panoramic photos of the detection object. The system's visual processing software can find the center position of all paper tubes at once.

[0055] (3) There can be one or more photographic detection devices. For example, a zoom camera can be used to take a picture of the paper tube opening of the paper tube firework, and then the focus can be adjusted to take a picture of the inside of each paper tube.

[0056] (4) The horizontal motion module can be selected according to the actual production needs. For example, if only paper tube fireworks of the same size are transported each time, only one set of horizontal motion module can be used.

[0057] (5) The image data of the position of each paper tube opening can be obtained by the positioning camera 313 of the photo detection device by taking pictures of the paper tubes of the paper tube firework at the same time, or by taking pictures of the paper tubes of the paper tube firework one by one.

Claims

1. A method for detecting the fuse of a paper tube firework pyrotechnic, characterized in that: include: The paper tube fireworks are held in a deflectable clamping device to change their shape. Under different shapes, a photographic inspection device is used to first photograph the opening of the paper tube fireworks to obtain image data of the position of each paper tube opening. Based on the image data of the position of each paper tube opening, the photographic inspection device is used to locate and photograph the inside of each paper tube to obtain image data of the lead wire. Based on the image data of the lead wire inside each paper tube under different shapes of the paper tube fireworks, data processing and comparative analysis are performed to determine whether the paper tube fireworks are qualified.

2. The method for detecting the fuse of a paper tube firework pyrotechnic as described in claim 1, characterized in that: The photographic detection device obtains image data of the positions of each paper tube opening by photographing all the paper tubes of the paper tube firework pyrotechnica simultaneously, or by photographing each paper tube of the paper tube firework pyrotechnica one by one.

3. The method for detecting the fuse of a paper tube firework pyrotechnic as described in claim 2, characterized in that: The photographic detection device includes a positioning camera that uses a wide-angle camera to photograph and position the opening of the paper tube of the paper tube firework, and a detection camera that uses a non-wide-angle camera to photograph the interior of each paper tube; or a zoom camera that first photographs and positions the opening of the paper tube of the paper tube firework, adjusts the focus, and then photographs the interior of each paper tube.

4. The method for detecting the fuse of a paper tube firework pyrotechnic as described in claim 3, characterized in that: The photographic detection device includes a housing, two positioning cameras arranged vertically on the housing, and one or more detection cameras or a zoom camera located between the two positioning cameras.

5. The method for detecting the fuse of a paper tube firework pyrotechnic as described in claim 3, characterized in that: The photographic detection device takes pictures according to the following path: When the paper tube firework is deformed, only take pictures of the two rows of paper tubes on both sides of the firework as they move upwards or downwards one by one. When the paper tube fireworks are not deformed, start from the outermost row of paper tubes and move them one by one upwards to take pictures. After reaching the top paper tube, move it horizontally to the adjacent paper tube and then move it downwards one by one to take pictures. Repeat this process to take pictures of all the paper tubes.

6. The method for detecting the fuse of a paper tube firework pyrotechnic as described in claim 1, characterized in that: The shape of the paper tube firework pyrotechnic includes: The clamping device first deflects at an angle in one direction, then deflects at an angle in the opposite direction, and then returns to its original position in different shapes; Or the different shapes of the clamping device when it first deflects to one direction by an angle and then returns to its original position; Or the different shapes when the clamping device is stationary and then deflected in one direction by an angle; Or the different shapes when the clamping device is stationary and then deflected by an angle in one direction and then by an angle in the opposite direction.

7. The method for detecting the fuse of a paper tube firework pyrotechnic as described in claim 6, characterized in that: The numerical range of the angle is 1 to 10°.

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