Visual image acquisition device for measuring glass size
By designing a visual image acquisition device including an external mounting connector, an encoder fixing plate and an air-source piston push rod, the scanning imaging error problem caused by slipping and jitter of the transmission line is solved, and high-precision glass size measurement is achieved.
Patent Information
- Application Number
- CN202411734011.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-11
AI Technical Summary
During use, the existing visual image acquisition device for measuring glass size has a large scanning imaging error due to unstable factors such as sliding and jitter in the transmission line, which leads to a large size measurement error.
A visual image acquisition device including an external mounting connector, an encoder fixing plate and an air-source piston push rod is designed. The glass arrival signal is sent to the PLC through a photoelectric sensor. The PLC controls the cylinder solenoid valve to push the air-source piston push rod so that the press-holding roller has no slip contact with the glass and maintains synchronous operation, ensuring that the line frequency of the image acquisition is consistent with the glass running speed.
It effectively improves the image imaging accuracy, reduces the error in size measurement, and provides a foundation for subsequent high-precision dimensional measurement algorithms.
Smart Images
Figure CN119590864A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of glass size measurement, in particular to a visual image acquisition device for measuring glass size. Background Art
[0002] With the continuous development of technology, machine vision technology is widely used in various industries in the manufacturing industry. In the production process of bathroom glass, its size needs to be measured to ensure the quality of the glass.
[0003] However, the existing visual image acquisition device for measuring glass size has the following problems during use: when traditionally using machine vision technology to measure the size of large-sized bathroom glass, due to the influence of unstable factors such as transmission line slippage, jitter, and transmission line jump, it will cause large image errors when the line scanning camera is imaging, which in turn leads to large size measurement errors. Summary of the invention
[0004] The purpose of the present invention is to provide a visual image acquisition device for measuring glass size, so as to solve the related problems of scanning imaging errors caused by factors such as glass slipping and jittering in the transmission line in the bathroom size measurement solution based on machine vision.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a visual image acquisition device for measuring glass size, comprising an external mounting connector, an encoder fixing plate and an air source piston push rod, the bottom end of the external mounting connector is mounted with an encoder fixing plate, the top end of the external mounting connector is mounted with a linear guide, and a linear fixing block is arranged above the linear guide, the top end of the linear fixing block is mounted with a cylinder solenoid valve, and one side of the cylinder solenoid valve is mounted with a plastic pad, a main body connector is mounted inside the linear guide, and a roller fixing plate passing through the external mounting connector is mounted at the bottom end of the main body connector, a roller fixing bracket is mounted on one side of the roller fixing plate, and a roller fixing shaft connected to a synchronous wheel fixing shaft is mounted on the top end of the roller fixing bracket, a holding roller is arranged on the outer wall of the roller fixing shaft, a holding mechanism for driving the holding roller to press forward is arranged on one side of the cylinder solenoid valve, a holding roller encoder is arranged at the bottom end of the encoder fixing plate, and an output end of the holding roller encoder is connected to the top end of the synchronous wheel fixing shaft.
[0006] The technical solution provides a visual image acquisition device for measuring glass size, wherein the outer wall of the synchronous wheel fixed shaft is respectively provided with a first synchronous wheel and a second synchronous wheel, and the outer walls of the first synchronous wheel and the second synchronous wheel are sleeved with belts.
[0007] The technical solution provides a visual image acquisition device for measuring glass dimensions, wherein the outer wall of the pressing roller is provided with anti-slip grooves.
[0008] The technical solution provides a visual image acquisition device for measuring glass dimensions, wherein the holding mechanism comprises a connecting rod fixing plate and an air source piston push rod, a connecting rod fixing plate is installed on the side of the cylinder solenoid valve away from the plastic pad, and an air source piston push rod is arranged on the rear wall of the connecting rod fixing plate.
[0009] The technical solution provides a visual image acquisition device for measuring glass dimensions, wherein a spherical connecting rod penetrating a plastic cushion block is installed at the output end of the air source piston push rod.
[0010] The present technical solution provides a visual image acquisition device for measuring glass dimensions, comprising the following steps: Step 1: Install the holding roller behind the photoelectric sensor A and at the same level as the glass, and then place the glass on the conveyor line for transmission; Step 2: When the glass reaches below the photoelectric sensor A, the photoelectric sensor sends a glass arrival signal to the PLC, and the PLC controls the cylinder solenoid valve to push the air source piston push rod, so that the holding mechanism composed of the main connecting part, the roller fixing plate and the linear guide rail applies a force to the holding roller to press the glass down, so that the holding roller and the glass are in non-slip contact and maintain synchronous operation; Step 3: The holding roller collects the glass travel speed by synchronously running through the second synchronous wheel, the first synchronous wheel, the belt and the pressing wheel encoder; Step 4: After the glass is collected, the pressure wheel encoder sends a glass conveying speed signal to the line scan camera, so that the line scan camera starts to collect images in accordance with the running speed of the glass; Step 5: After the photoelectric sensor A fails to detect the glass, the line scan camera completes the acquisition, and the photoelectric sensor A sends information to the PCL. The PLC controls the cylinder solenoid valve to push the air source piston push rod, so that the holding roller returns to its position and waits for the next glass to arrive.
[0011] Compared with the prior art, the present invention provides a visual image acquisition device for measuring glass dimensions, which has the following beneficial effects: 1. The present invention sends a glass arrival signal to PLC through photoelectric sensor A, and PLC controls the cylinder solenoid valve to push the air source piston push rod, and the air source piston push rod pushes the spherical connecting rod, so that the spherical connecting rod pushes the main connecting part to move in the linear guide rail, and then the main connecting part drives the holding roller to contact the glass below, and applies a force to the holding roller to press the glass downward, so that the holding roller and the glass are in contact without slipping and maintain synchronous operation. The holding roller drives the holding roller encoder to run synchronously through the second synchronous wheel, the first synchronous wheel, and the belt. Under the action of the holding roller, the glass runs without slipping on the transmission line. The image acquisition speed sent by the holding roller encoder to the line scanning camera is always consistent, which will not cause image deformation, effectively improves the imaging accuracy of the image, and provides a basis for the subsequent high-precision dimensional measurement algorithm.
[0012] 2. The present invention sends a signal to the line scan camera to start scanning the glass image through the photoelectric sensor A, and the line scan camera starts to collect images. The pressure roller encoder sends a glass speed signal to the line scan camera, so that the line frequency of the line scan camera collecting images is consistent with the glass running speed, and a high-accuracy image is obtained. When the glass leaves the photoelectric sensor A, the camera ends collecting the image, and the air source piston push rod is started to drive the pressure roller to reset, waiting for the next glass to arrive. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 It is a left-side structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the main structure of the present invention; Figure 5 It is a schematic diagram of the structure of the glass transmission line process of the present invention.
[0014] In the figure: 1. External mounting connector; 2. First synchronous wheel; 3. Roller fixing shaft; 4. Roller fixing bracket; 5. Synchronous wheel fixing shaft; 6. Roller fixing plate; 7. Encoder fixing plate; 8. Cylinder solenoid valve; 9. Connecting rod fixing plate; 10. Plastic pad; 11. Pressing roller; 12. Pressing roller encoder; 13. Second synchronous wheel; 14. Linear guide; 15. Linear fixing block; 16. Belt; 17. Main body connector; 18. Ball connecting rod; 19. Air source piston push rod. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0016] Embodiment 1, as Figure 1-2 As shown, the present invention provides a technical solution: a visual image acquisition device for measuring glass size, comprising an external mounting connector 1, an encoder fixing plate 7 and an air source piston push rod 19, the encoder fixing plate 7 is installed at the bottom end of the external mounting connector 1, a linear guide 14 is installed at the top end of the external mounting connector 1, and a linear fixing block 15 is arranged above the linear guide 14, a cylinder solenoid valve 8 is installed at the top end of the linear fixing block 15, and a plastic cushion block 10 is installed on one side of the cylinder solenoid valve 8, a main body connector 17 is installed inside the linear guide 14, and a roller fixing plate 6 penetrating the external mounting connector 1 is installed at the bottom end of the main body connector 17, a roller fixing bracket 4 is installed on one side of the roller fixing plate 6, and a roller fixing shaft 3 connected to the synchronous wheel fixing shaft 5 is installed on the top of the roller fixing bracket 4, a holding roller 11 is arranged on the outer wall of the roller fixing shaft 3, and a cylinder solenoid valve 8 is installed on one side for driving the holding roller 1 1 is a pressing mechanism for pressing forward, a pressing wheel encoder 12 is arranged at the bottom end of the encoder fixing plate 7, and the output end of the pressing wheel encoder 12 is connected to the top end of the synchronous wheel fixing shaft 5, the outer wall of the synchronous wheel fixing shaft 5 is respectively provided with the first synchronous wheel 2 and the second synchronous wheel 13, and the outer wall of the first synchronous wheel 2 and the second synchronous wheel 13 is sleeved with a belt 16, the outer wall of the pressing roller 11 is provided with anti-slip grooves, the pressing mechanism includes a connecting rod fixing plate 9 and an air source piston push rod 19, the connecting rod fixing plate 9 is installed on the side of the cylinder solenoid valve 8 away from the plastic cushion block 10, and the air source piston push rod 19 is arranged on the rear wall of the connecting rod fixing plate 9, and a ball connecting rod 18 penetrating the plastic cushion block 10 is installed at the output end of the air source piston push rod 19, and the ball connecting rod 18 is pushed by starting the air source piston push rod 19, so that the ball connecting rod 18 pushes the main connecting member 17 to move in the linear guide rail 14, and then the main connecting member 17 drives the pressing roller 11 to contact the glass below.
[0017] Embodiment 2, as Figure 1-5 As shown, the present invention provides a technical solution: a visual image acquisition device for measuring glass size, comprising the following steps: Step 1: Install the holding roller 11 behind the photoelectric sensor A and at the same level as the glass, and then place the glass in the conveyor line for transmission; Step 2: When the glass reaches below the photoelectric sensor A, the photoelectric sensor sends a glass arrival signal to the PLC, and the PLC controls the cylinder solenoid valve 8 to push the air source piston push rod 19, so that the holding mechanism composed of the main connecting part 17, the roller fixing plate 6 and the linear guide 14 applies a force to the holding roller 11 to press the glass downward, so that the holding roller 11 and the glass are in non-slip contact and maintain synchronous operation; Step 3: The holding roller 11 collects the glass travel speed by synchronously running through the second synchronous wheel 13, the first synchronous wheel 2, the belt 16 and the pressing wheel encoder 12; Step 4: After the glass is collected, the pressure wheel encoder 12 sends a glass conveying speed signal to the line scanning camera, so that the line scanning camera starts to collect images in accordance with the running speed of the glass; Step 5: After the photoelectric sensor A does not detect the glass, the line scan camera acquisition ends, the photoelectric sensor A sends information to the PCL, and the PLC controls the cylinder solenoid valve 8 to push the air source piston push rod 19, so that the holding roller 11 returns to its position and waits for the next glass to arrive; This step can solve the problem of scanning imaging errors caused by glass slipping and jittering in the transmission line in the bathroom size measurement solution based on machine vision.
[0018] Working principle: first, turn on the external power supply, fix the external installation connector 1 to the external conveying frame with bolts, place the glass in the conveyor line for transmission until the glass reaches the bottom of the photoelectric sensor A and contacts the holding roller 11. Then the photoelectric sensor A sends a glass arrival signal to the PLC, and the PLC controls the cylinder solenoid valve 8 to push the air source piston push rod 19. The air source piston push rod 19 pushes the ball connecting rod 18, so that the ball connecting rod 18 pushes the main connecting part 17 to move in the linear guide 14, and then the main connecting part 17 drives the holding roller 11 to contact the glass below, applying a force to the holding roller 11 to press the glass downward, so that the holding roller 11 is in contact with the glass without slipping, and keeps synchronous operation. The holding roller 11 passes through the second synchronous wheel 13 and the first synchronous wheel 14. A synchronous wheel 2 and a belt 16 drive the pressure roller encoder 12 to run synchronously. Under the action of the pressure roller 11, the glass runs on the transmission line without slipping. When the glass arrives, the photoelectric sensor A sends a signal to the line scanning camera to start scanning the glass image, and the line scanning camera starts to collect images. The pressure roller encoder 12 sends a glass speed signal to the line scanning camera to keep the line frequency of the image collected by the line scanning camera consistent with the running speed of the glass to obtain a high-accuracy image. When the glass leaves the photoelectric sensor A, the camera ends collecting the image, and the air source piston push rod 19 is started to drive the pressure roller 11 to reset and wait for the next glass to arrive. This structure can solve the problem of scanning imaging errors caused by factors such as glass slipping and jittering in the transmission line in the bathroom size measurement solution based on machine vision.
[0019] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.
Claims
1. A visual image acquisition device for measuring glass dimensions, comprising an external mounting connector (1), an encoder fixing plate (7) and an air source piston push rod (19), characterized in that: An encoder fixing plate (7) is installed at the bottom end of the external mounting connection member (1), a linear guide rail (14) is installed at the top end of the external mounting connection member (1), and a linear fixing block (15) is arranged above the linear guide rail (14), a cylinder solenoid valve (8) is installed at the top end of the linear fixing block (15), and a plastic pad (10) is installed on one side of the cylinder solenoid valve (8), a main body connection member (17) is installed inside the linear guide rail (14), and a roller fixing member (17) that passes through the external mounting connection member (1) is installed at the bottom end of the main body connection member (17). A plate (6), a roller fixing bracket (4) is installed on one side of the roller fixing plate (6), and a roller fixing shaft (3) connected to the synchronous wheel fixing shaft (5) is installed on the top of the roller fixing bracket (4), a pressing roller (11) is arranged on the outer wall of the roller fixing shaft (3), a pressing mechanism for driving the pressing roller (11) to press forward is installed on one side of the cylinder solenoid valve (8), a pressing roller encoder (12) is arranged at the bottom end of the encoder fixing plate (7), and the output end of the pressing roller encoder (12) is connected to the top of the synchronous wheel fixing shaft (5).
2. A visual image acquisition device for measuring glass dimensions according to claim 1, characterized in that: The outer wall of the synchronous wheel fixing shaft (5) is respectively provided with a first synchronous wheel (2) and a second synchronous wheel (13), and the outer walls of the first synchronous wheel (2) and the second synchronous wheel (13) are sleeved with a belt (16).
3. A visual image acquisition device for measuring glass dimensions according to claim 1, characterized in that: The outer wall of the pressing roller (11) is provided with anti-slip grooves.
4. The visual image acquisition device for measuring glass size according to claim 1, characterized in that: The holding mechanism comprises a connecting rod fixing plate (9) and an air source piston push rod (19); the connecting rod fixing plate (9) is installed on a side of the cylinder solenoid valve (8) away from the plastic cushion block (10), and the air source piston push rod (19) is arranged on a rear wall of the connecting rod fixing plate (9).
5. The visual image acquisition device for measuring glass size according to claim 1, characterized in that: A spherical connecting rod (18) penetrating the plastic cushion block (10) is installed at the output end of the gas source piston push rod (19).
6. The acquisition method of the visual image acquisition device for measuring glass size according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Install the holding roller (11) behind the photoelectric sensor A and at the same level as the glass, and then place the glass in the conveyor line for transmission; Step 2: When the glass reaches below the photoelectric sensor A, the photoelectric sensor sends a glass arrival signal to the PLC, and the PLC controls the cylinder solenoid valve (8) to push the air source piston push rod (19), so that the holding mechanism composed of the main connecting member (17), the roller fixing plate (6) and the linear guide rail (14) applies a force to press the glass downward to the holding roller (11) through the holding mechanism, so that the holding roller (11) and the glass are in non-slip contact and maintain synchronous operation; Step 3: The holding roller (11) collects the glass travel speed by synchronously running the second synchronous wheel (13), the first synchronous wheel (2), the belt (16) and the pressure wheel encoder (12); Step 4: After the glass is collected, the pressure wheel encoder (12) sends a glass conveying speed signal to the line scanning camera, so that the line scanning camera starts to collect images in accordance with the running speed of the glass; Step 5: After the photoelectric sensor A fails to detect the glass, the line scan camera completes the acquisition, and the photoelectric sensor A sends information to the PCL. The PLC controls the cylinder solenoid valve (8) to push the air source piston push rod (19), so that the holding roller (11) returns to its original position and waits for the next glass to arrive.