A new material plastic product fixed point detection device based on optical means

Abstract

This invention discloses a fixed-point detection device for new material plastic products based on optical methods, belonging to the field of new material detection technology. It includes a detection platform with a first conveyor belt mounted on its top outer end, and a limiting plate mounted on the top outer end of the first conveyor belt. When the plastic product's size conforms to the standard, after being positioned on the first conveyor belt by the limiting plate, its center will align with the center of the suction cup. The sensing point of the infrared detector is located two millimeters outward from the outline of the standard-sized plastic product. During rotation, because the centers of the two coincide, the outer edge of the plastic product remains within the infrared detection range. If the plastic product is too large, it will be in an off-center state when attracted by the suction cup. During rotation, the portion exceeding the standard outline will be identified by the infrared detector. This allows the device to determine whether the outer outline size is acceptable by whether the infrared detector senses the plastic product.

Description

Technical Field

[0001] This invention relates to the field of new material testing technology, specifically to a fixed-point testing device for new material plastic products based on optical methods. Background Technology

[0002] New material plastic products, with their excellent mechanical properties, chemical stability and functional customization, have deeply penetrated into key fields such as high-end manufacturing, biomedicine, new energy and aerospace. From lightweight composite material parts for new energy vehicles and high-precision medical catheters for biomedicine, to weather-resistant encapsulation films for photovoltaic modules and high-temperature resistant structural components for aerospace, new material plastic products are gradually replacing traditional materials such as metals and ceramics, becoming the core basic materials supporting the development of strategic emerging industries.

[0003] However, the "performance advantages" and "application safety" of new plastic materials are highly dependent on precise quality control, highlighting the increasing importance of the testing process. On one hand, the composition and structure of new plastic materials are more complex: compared to traditional general-purpose plastics such as polyethylene and polypropylene, new materials such as modified reinforced plastics, bio-based degradable plastics, and functional polymers often achieve functional breakthroughs through multi-component blending, nanocomposite processes, and cross-linking modification. This makes their performance significantly affected by component ratios, microstructure, and processing techniques, requiring professional testing to avoid problems such as "performance fluctuations caused by uneven composition" and "safety hazards caused by processing defects." For example, if the plastic casing of a new energy vehicle battery pack has insufficient impact resistance, it may cause battery leakage during a collision; if new materials used in medical infusion sets release harmful substances, it will directly threaten the health of patients.

[0004] Currently, traditional methods for quality inspection of such plastic products mostly rely on manual visual inspection or simple mechanical measurement. Manual inspection is inefficient, labor-intensive, and easily affected by subjective factors, making it difficult to guarantee the consistency and accuracy of the inspection. Although some automated inspection equipment has been put into use, such as image processing-based vision inspection systems, they are easily affected by light interference when dealing with reflective, transparent, or translucent materials, resulting in insufficient inspection stability. In addition, most equipment has limited functions and cannot simultaneously complete multi-dimensional inspections of size, damage, and surface flatness in a single process.

[0005] In addition, existing inspection devices often suffer from slow inspection speed, inaccurate positioning, and difficulty in identifying minute defects when dealing with mass production scenarios. Especially when inspecting the outer contour and inner wall of round containers (such as plastic products) simultaneously, existing technologies often adopt step-by-step or multi-station inspection methods, resulting in complex equipment structures, large floor space, and high costs.

[0006] Therefore, there is an urgent need in this field for an automated device that can achieve efficient, accurate, and multi-dimensional integrated testing to meet the quality control requirements of new material plastic products in large-scale production environments. Summary of the Invention

[0007] The purpose of this invention is to provide a novel optical method for the fixed-point detection of plastic products, in order to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a fixed-point detection device for a new type of plastic product based on optical means, comprising a detection platform, a first conveyor belt mounted on the top outer end of the detection platform, a limiting plate mounted on the top outer end of the first conveyor belt, a plastic product mounted on the top of the first conveyor belt, a conveying assembly mounted on the top middle of the detection platform, the conveying assembly comprising a first motor, a rotating seat mounted on the output end of the first motor, rotating arms mounted on both outer ends of the rotating seat, an electric push rod mounted on the bottom end of the rotating arm, and a suction pump mounted on the bottom end of the electric push rod. A second motor is fixed to the outer end of the suction pump. A rotating shaft is installed at the output end of the second motor, and a vent groove is opened at the outer end of the rotating shaft. A through groove is opened at the middle of the inner end of the rotating shaft. An inner ring seat is sleeved on the outer end of the rotating shaft, and an outer ring seat is installed at the outer end of the inner ring seat. A pressure sensing spring is installed between the inner ring seat and the outer ring seat. A suction pipe is fixed between the outer ring seat and the suction pump. A suction cup is installed at the bottom end of the rotating shaft. An infrared light detector is fixed to the outer front end of the detection platform. A detection component is installed at the outer top end of the detection platform. A sorting conveyor belt is installed at the rear top end of the detection platform.

[0009] Furthermore, the limiting plate is attached to the plastic product, and when the limiting plate is attached to the plastic product, the vertical center line of the plastic product and the suction cup coincide.

[0010] Furthermore, the inner ring seat is connected to the outer ring seat via a pressure-sensing spring, and the outer ring seat is fixedly connected to the suction tube.

[0011] Furthermore, the suction pump is connected to the outer ring seat through a suction pipe, and the outer ring seat is connected to the suction cup through a venting groove and a connecting groove.

[0012] Furthermore, the electric actuator drives the suction cup to rise and fall, and the suction cup is adsorbed and fixed to the plastic product.

[0013] Furthermore, the detection assembly includes a lifting platform, a detection seat is disposed at the top outer end of the lifting platform, a first ball bearing seat is disposed inside the detection seat, a first pressing seat is disposed at the bottom outer end of the first ball bearing seat, a first pressure-sensitive seat is disposed inside the detection seat, and a first return spring is disposed between the detection seat and the first ball bearing seat, an inner liner is disposed inside the detection seat, a second ball bearing seat is disposed inside the inner liner, a second pressing seat is disposed at the bottom of the second ball bearing seat, a second pressure-sensitive seat is disposed inside the inner liner, a second return spring is disposed between the inner liner and the second ball bearing seat, a first laser rangefinder is disposed inside the detection seat, and a second laser rangefinder is disposed inside the inner liner.

[0014] Furthermore, the first ball bearing seat is attached to the outer surface of the plastic product, and the second ball bearing seat is attached to the inner surface of the plastic product.

[0015] Furthermore, the first ball bearing seat is elastically connected to the first reset spring, and the first pressing seat is in contact with the first pressure-sensitive seat.

[0016] Furthermore, the second ball bearing seat is elastically connected to the second return spring, and the second pressing seat is in contact with the second pressure-sensitive seat.

[0017] Furthermore, the first laser rangefinder faces the outer surface of the plastic product, and the second laser rangefinder faces the inner surface of the plastic product.

[0018] This invention provides a novel optical-based device for pinpoint detection of plastic products, which has the following advantages:

[0019] 1. Driven by a first motor, the rotating seat rotates, which in turn drives the rotating arm to move the plastic product to the side of the infrared detector. Then, the second motor starts, causing the suction cup to rotate the plastic product. When the size of the plastic product meets the standard, after being positioned by the limiting plate on the first conveyor belt, its center will be aligned with the center of the suction cup. The sensing point of the infrared detector is located two millimeters outward from the outline of the standard-sized plastic product. During the rotation, because the centers of the two coincide, the outer edge of the plastic product is always within the infrared detection range. If the size of the plastic product is too large, it will be in an off-center state when it is attracted by the suction cup. During the rotation, the part that exceeds the standard outline will be identified by the infrared detector. Based on this structure, the equipment can determine whether the outer outline size is qualified based on whether the infrared detector senses the plastic product. This solution can efficiently and accurately screen out plastic products with poor dimensions, significantly improving the inspection efficiency.

[0020] 2. In this invention, when the size of the plastic product to be detected is smaller than the standard specification, or when there is damage to its outer surface that prevents the infrared detector from directly identifying it, the second motor will continue to operate, driving the suction cup to rotate the plastic product continuously. If the size of the plastic product is too small, it cannot be effectively positioned at the limiting plate, causing the suction cup to be in an eccentric state when gripping it. The eccentric plastic product vibrates due to centrifugal force during rotation, and this vibration is transmitted to the inner ring seat through the rotating shaft. The inner ring seat is connected to the outer ring seat via a pressure-sensing spring, and the outer ring seat is fixed via a suction tube. When the vibration is transmitted to the inner ring seat, the pressure-sensing spring... Due to deformation caused by force, this structure isolates the outer ring seat from vibration while accurately capturing vibration signals with the help of a pressure sensor built into the spring. Based on this mechanism, the equipment can determine whether the current plastic product is undersized by whether the pressure sensing spring detects vibration. In addition, if there is damage on the outer surface of the plastic product, rotation will also induce eccentric force, thereby generating a recognizable vibration signal. This allows the detection method to simultaneously identify surface damage defects and achieve multiple anomaly identifications through the same detection process. In the context of large-scale production of plastic products, this further improves the overall detection efficiency of the equipment.

[0021] 3. After completing the outer contour dimension and damage detection, the plastic product rotates with the rotating seat to the top of the detection seat. Then, the lifting platform rises, and the electric push rod descends, sending the plastic product into the detection seat. At this time, the outer surface of the plastic product contacts the first ball bearing seat, and the inner surface is in contact with the second ball bearing seat. After the second motor starts, the suction cup drives the plastic product to rotate, causing the first and second ball bearing seats to slide along their surfaces. The first ball bearing seat is supported by a first return spring. If the surface smoothness of the plastic product is insufficient, the ball bearing seat will be compressed or ejected under the action of the spring when passing through areas with obvious unevenness. The first pressing seat at its bottom is in contact with the first pressure-sensitive seat. Therefore, when passing through uneven areas, the pressure on the first pressure-sensitive seat will fluctuate significantly. When the first pressure-sensitive seat repeatedly senses pressure changes at the same position during the continuous rotation of the plastic product, the equipment triggers the first laser rangefinder to start. As the plastic product rotates subsequently, the abnormal point will be oriented towards the laser emission direction. The first laser rangefinder can accurately determine whether there are obvious concave or convex defects at this point through multi-point ranging. Through the rapid positioning of the first ball bearing seat and the precise measurement of the first laser rangefinder, the equipment achieves efficient and accurate detection of surface concave and convex points, greatly adapting to the quality inspection needs of large-scale production scenarios. At the same time, the second ball bearing seat placed in the inner liner and the second laser rangefinder use the same principle to synchronously detect the inner contour of the plastic product. The inner and outer contour detection processes do not interfere with each other, further improving the overall detection efficiency of the equipment. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall three-dimensional structure of a novel material plastic product fixed-point detection device based on optical means according to the present invention.

[0023] Figure 2 This is a schematic diagram of the first conveyor belt structure of a new material plastic product fixed-point detection device based on optical means according to the present invention.

[0024] Figure 3 This is a schematic diagram of the overall structure of the handling component of a novel material plastic product positioning detection device based on optical means according to the present invention;

[0025] Figure 4 This is a schematic diagram of the detection component structure of a novel optical-based plastic product positioning detection device according to the present invention.

[0026] Figure 5 This is a schematic diagram of the detection status of the infrared detector in a fixed-point detection device for a novel material plastic product based on optical means according to the present invention.

[0027] Figure 6 This is a cross-sectional schematic diagram of the transport component and the detection component of a novel material plastic product positioning detection device based on optical means according to the present invention.

[0028] Figure 7 This invention relates to a novel optical method for pinpoint detection of plastic products. Figure 6 Enlarged structural diagram at point A in the middle;

[0029] Figure 8 This is a cross-sectional schematic diagram of the inner and outer ring seats of a novel optical-based fixed-point detection device for plastic products according to the present invention.

[0030] In the diagram: 1. Inspection table; 2. First conveyor belt; 3. Limiting plate; 4. Plastic product; 5. Handling assembly; 501. First motor; 502. Rotating seat; 503. Rotating arm; 504. Electric actuator; 505. Suction pump; 506. Second motor; 507. Rotating shaft; 508. Ventilation slot; 509. Through slot; 510. Inner ring seat; 511. Outer ring seat; 512. Pressure sensing spring; 513. Suction pipe; 514. Suction cup; 6 7. Infrared light detector; 7. Detection assembly; 701. Lifting platform; 702. Detection seat; 703. First ball bearing seat; 704. First pressing seat; 705. First pressure-sensitive seat; 706. First return spring; 707. Inner liner seat; 708. Second ball bearing seat; 709. Second pressing seat; 710. Second pressure-sensitive seat; 711. Second return spring; 712. First laser rangefinder; 713. Second laser rangefinder; 8. Sorting conveyor belt. Detailed Implementation

[0031] Please see Figures 1 to 8 This invention provides a technical solution: a fixed-point detection device for a new type of plastic product based on optical means, comprising a detection platform 1, a first conveyor belt 2 mounted on the top outer end of the detection platform 1, a limiting plate 3 mounted on the top outer end of the first conveyor belt 2, a plastic product 4 mounted on the top of the first conveyor belt 2, and a conveying assembly 5 mounted on the top middle of the detection platform 1. The conveying assembly 5 includes a first motor 501, a rotating seat 502 mounted on the output end of the first motor 501, rotating arms 503 mounted on both outer ends of the rotating seat 502, an electric push rod 504 mounted on the bottom end of the rotating arm 503, a suction pump 505 mounted on the bottom end of the electric push rod 504, and a second motor 506 fixed to the outer end of the suction pump 505. A rotating shaft 507 mounted on the output end of the second motor 506, a ventilation groove 508 opened on the outer end of the rotating shaft 507, a through groove 509 opened on the inner middle end of the rotating shaft 507, and a sleeve on the outer end of the rotating shaft 507. An inner ring seat 510 is provided, and an outer ring seat 511 is installed at the outer end of the inner ring seat 510. A pressure sensing spring 512 is provided between the inner ring seat 510 and the outer ring seat 511. A suction pipe 513 is fixed between the outer ring seat 511 and the suction pump 505. A suction cup 514 is installed at the bottom end of the rotating shaft 507. An infrared light detector 6 is fixed at the front outer end of the detection table 1. The limiting plate 3 is attached to the plastic product 4, and when the limiting plate 3 is attached to the plastic product 4, the plastic product 4 and... The vertical center lines of the suction cups 514 coincide. The inner ring seat 510 is connected to the outer ring seat 511 through the pressure sensing spring 512, and the outer ring seat 511 is fixedly connected to the suction pipe 513. The suction pump 505 is connected to the outer ring seat 511 through the suction pipe 513, and the outer ring seat 511 is connected to the suction cup 514 through the ventilation groove 508 and the through groove 509. The electric push rod 504 drives the suction cup 514 to rise and fall, and the suction cup 514 is adsorbed and fixed to the plastic product 4.

[0032] The specific operation is as follows: After the worker or robotic arm moves the plastic product 4 to be inspected to the top of the first conveyor belt 2, the first conveyor belt 2 moves the plastic product 4 along it. When the plastic product 4 reaches the end of the first conveyor belt 2, the limiting plate 3 limits and positions it, ensuring alignment between the plastic product 4 and the center of the suction cup 514. After the plastic product 4 is positioned, the electric actuator 504 activates the suction pump 505, which drives the second motor 506 to move downwards. This allows the suction cup 514 to adhere to the top surface of the plastic product 4. At this time, the suction pump 505 transmits suction force through the suction pipe 513, the ventilation slot 508, and the connecting slot 509 to the inside of the suction cup 514. A negative pressure is formed inside the suction cup 514, thereby adsorbing the plastic product 4. At this time, the electric push rod 504 resets, enabling the suction cup 514 to grip the plastic product 4. The first motor 501 drives the rotating seat 502 to rotate, which causes the rotating arm 503 to move the plastic product 4 to the side of the infrared light detector 6. At this time, the second motor 506 works, enabling the suction cup 514 to rotate the plastic product 4. If the size of the plastic product 4 is normal, after the movement of the plastic product 4 on the first conveyor belt 2 is restricted by the limiting plate 3, its center position will coincide with the center of the suction cup 514. The sensing point of the infrared light detector 6 is located two millimeters outward from the outline of the normal-sized plastic product 4. At this time, when the plastic product 4 rotates with the suction cup 514, due to the two The circular shapes overlap, and the outer contour of the normally sized plastic product 4 is always within the detection point of the infrared detector 6. If the size of the plastic product 4 being detected is too large, the two will be in an off-center state when the plastic product 4 is attracted by the suction cup 514. After rotation, the off-center part of the plastic product 4 will be sensed by the infrared detector 6. Through this design, the equipment can determine whether there is an abnormality in the outer contour size of the plastic product 4 by judging whether the infrared detector 6 detects the plastic product 4. Through this design, the equipment can quickly and accurately eliminate plastic products 4 with abnormal sizes, which can greatly improve the detection efficiency of the equipment. In addition, if the size of the plastic product 4 being detected is smaller than the normal size or the outer surface of the plastic product 4 is damaged, etc., and the infrared detector 6 cannot detect it, the second... The motor 506 operates continuously, causing the suction cup 514 to continuously rotate the plastic product 4. When the size of the plastic product 4 is too small, it cannot be fully stopped by the limiting plate 3. This causes the suction cup 514 to be in an eccentric state when gripping the small plastic product 4. The centrifugal force generated by the eccentric plastic product 4 during rotation produces a vibration force, which can be transmitted to the surface of the inner ring seat 510 through the rotating shaft 507. The inner ring seat 510 is connected to the outer ring seat 511 through the pressure sensing spring 512, and the outer ring seat 511 is fixed by the suction tube 513. When the vibration is transmitted to the inner ring seat 510, the pressure sensing spring 512 will deform due to the vibration force. This design ensures that the outer ring seat 511 is not affected by the vibration force.Furthermore, the pressure sensor built into the pressure-sensing spring 512 can accurately sense vibrations. Through this design, the equipment can determine whether the currently inspected plastic product 4 is undersized by whether the pressure-sensing spring 512 senses vibrations. Even when the outer surface of the plastic product 4 is damaged, it will still generate eccentric force during rotation. This allows for continued inspection even when the outer surface of the plastic product 4 is damaged. This design enables the equipment to inspect more items using the same inspection steps. Given the large production volume of plastic products 4, this design further improves the equipment's inspection efficiency.

[0033] Please see Figures 1 to 8 A detection component 7 is mounted on the top outer end of the detection table 1, and a sorting conveyor belt 8 is mounted on the top rear end of the detection table 1. The detection component 7 includes a lifting platform 701, a detection seat 702 is mounted on the top outer end of the lifting platform 701, a first ball bearing seat 703 is mounted inside the detection seat 702, a first pressing seat 704 is mounted on the bottom outer end of the first ball bearing seat 703, a first pressure-sensitive seat 705 is mounted inside the detection seat 702, and a first return spring 706 is mounted between the detection seat 702 and the first ball bearing seat 703. An inner liner seat 707 is mounted inside the detection seat 702, a second ball bearing seat 708 is mounted inside the inner liner seat 707, a second pressing seat 709 is mounted on the bottom of the second ball bearing seat 708, and a second pressure-sensitive seat 71 is mounted inside the inner liner seat 707. A second return spring 711 is installed between the inner liner seat 707 and the second ball bearing seat 708. A first laser rangefinder 712 is installed inside the detection seat 702. A second laser rangefinder 713 is installed inside the inner liner seat 707. The first ball bearing seat 703 is attached to the outer surface of the plastic product 4, and the second ball bearing seat 708 is attached to the inner surface of the plastic product 4. The first ball bearing seat 703 is elastically connected to the first return spring 706. The first pressing seat 704 is attached to the first pressure-sensitive seat 705. The second ball bearing seat 708 is elastically connected to the second return spring 711. The second pressing seat 709 is attached to the second pressure-sensitive seat 710. The first laser rangefinder 712 faces the outer surface of the plastic product 4, and the second laser rangefinder 713 faces the inner surface of the plastic product 4.

[0034] The specific operation is as follows: the plastic product 4, after completing the outer contour dimension inspection and damage inspection, can be moved to the top of the inspection seat 702 by the rotation of the rotating seat 502. At this time, by the upward movement of the lifting platform 701 and the downward movement of the electric push rod 504, the plastic product 4 can be moved into the inspection seat 702. At this time, the outer surface of the plastic product 4 contacts the first ball bearing seat 703, and its inner surface can contact the second ball bearing seat 708. At this time, by the operation of the second motor 506, the suction cup 514 can drive the plastic product 4 to rotate, which allows the first ball bearing seat 703 and the second ball bearing seat 708 to slide on the surface of the plastic product 4. 3. Supported by the first return spring 706, if the surface smoothness of the plastic product 4 is low, when the first ball bearing seat 703 moves to a position with greater unevenness, it will be squeezed or popped out of the surface of the plastic product 4 due to the support of the first return spring 706. The first pressing seat 704 at the bottom of the first ball bearing seat 703 is in contact with the first pressure-sensitive seat 705. When the first ball bearing seat 703 moves through a position with greater unevenness on the surface of the plastic product 4, the pressure value of the first pressing seat 704 on the first pressure-sensitive seat 705 will change significantly. When the first pressure-sensitive seat 705 senses a significant pressure change at the same point during the continuous rotation of the plastic product 4, the device will start. When the first laser rangefinder 712 is activated, the plastic product 4, during its next rotation, will align the pressure-sensitive point with the first laser rangefinder 712. At this time, the first laser rangefinder 712 operates, using multi-point laser ranging to determine if there are any obvious unevenness or protrusion at that point. Through the cooperation of the first laser rangefinder 712 and the first ball bearing mount 703, the equipment can quickly locate uneven or protruding positions using the first ball bearing mount 703, and then accurately detect these positions using the first laser rangefinder 712. This design enables the equipment to achieve efficient and accurate detection of uneven or protruding points, making it more suitable for the large-scale inspection of plastic products 4. The detection principle of the second ball bearing seat 708 and the second laser rangefinder 713 inside the inner liner seat 707 is the same as that of the first laser rangefinder 712 and the first ball bearing seat 703. This allows the equipment to detect the inner contour dimension accuracy while detecting the outer contour dimension accuracy of the plastic product 4, and the two detection processes do not interfere with each other. This further improves the detection efficiency of the equipment. After the equipment completes the detection of the plastic product 4, it can move the detected plastic product 4 to the sorting conveyor belt 8. There are two conveyor lines on the sorting conveyor belt 8, which allows the equipment to move the plastic product 4 to different conveyor lines according to the detection results.

[0035] In summary, this optical-based fixed-point detection device for plastic products involves the operator or robotic arm first moving the plastic product 4 to be inspected to the top of the first conveyor belt 2. The first conveyor belt 2 then moves the plastic product 4 along it. Once the plastic product 4 reaches the end of the first conveyor belt 2, the limiting plate 3 limits and positions it, ensuring alignment between the plastic product 4 and the center of the suction cup 514. After the plastic product 4 is positioned, the electric actuator 504 activates the suction pump 505, which drives the second... The motor 506 moves downward, allowing the suction cup 514 to adhere to the top surface of the plastic product 4. At this time, the suction pump 505 works, allowing the suction force to be transmitted to the inside of the suction cup 514 through the suction pipe 513, the ventilation groove 508, and the through groove 509. This creates a negative pressure inside the suction cup 514, thereby achieving adsorption of the plastic product 4. At this time, the electric push rod 504 resets, allowing the suction cup 514 to grip the plastic product 4. The first motor 501 drives the rotating seat 502 to rotate, allowing the rotating arm 503 to move the plastic product 4 to the side of the infrared light detector 6.

[0036] Then, the second motor 506 operates, causing the suction cup 514 to rotate the plastic product 4. If the size of the plastic product 4 is normal, after the movement of the plastic product 4 on the first conveyor belt 2 is restricted by the limiting plate 3, its center position will coincide with the center of the suction cup 514. The sensing point of the infrared light detector 6 is located two millimeters outward from the outline of the normal-sized plastic product 4. At this time, when the plastic product 4 rotates with the suction cup 514, because the two circles coincide, the outer contour position of the normal-sized plastic product 4 is always within the detection point of the infrared light detector 6. If the detected plastic product 4 is too large, the two will be in an eccentric state when the plastic product 4 is attracted by the suction cup 514. After rotation, the eccentric part of the plastic product 4 will be sensed by the infrared light detector 6. Through this design, the equipment can determine whether the outer contour size of the plastic product 4 is abnormal by judging whether the infrared light detector 6 detects the plastic product 4. Through this design, the equipment can quickly and accurately eliminate plastic products 4 with abnormal size, which can greatly improve the detection efficiency of the equipment.

[0037] If the size of the plastic product 4 being tested is smaller than the standard size, or if the outer surface of the plastic product 4 is damaged and cannot be detected by the infrared detector 6, the second motor 506 continues to work, causing the suction cup 514 to continuously rotate the plastic product 4. When the size of the plastic product 4 is too small, it cannot be completely stopped when blocked by the limiting plate 3. This causes the suction cup 514 to be in an eccentric state when holding the small plastic product 4. The centrifugal force generated by the eccentric plastic product 4 during rotation will generate vibration force, which can be transmitted to the surface of the inner ring seat 510 through the rotating shaft 507. The inner ring seat 510 is connected to the outer ring seat 511 through the pressure sensing spring 512, and the outer ring seat 511 is fixed by the suction tube 513. When the vibration is transmitted... After the product is placed on the inner ring seat 510, the pressure sensing spring 512 will deform due to the vibration. This design ensures that the outer ring seat 511 will not be affected by the vibration. Furthermore, the pressure sensor built into the pressure sensing spring 512 can accurately sense the vibration. Through this design, the equipment can determine whether the plastic product 4 being inspected is too small by whether the pressure sensing spring 512 senses the vibration. Even if the outer surface of the plastic product 4 is damaged, it will still generate an eccentric force during rotation. This allows the plastic product 4 to still be inspected in this way if its outer surface is damaged. This design allows the equipment to inspect more items through the same inspection steps. Since the production volume of plastic products 4 is large, this design can further improve the inspection efficiency of the equipment.

[0038] After completing the outer contour dimension inspection and damage inspection, the plastic product 4 can be moved to the top of the inspection seat 702 by the rotation of the rotating seat 502. At this time, by the upward movement of the lifting platform 701 and the downward movement of the electric push rod 504, the plastic product 4 can be moved into the inspection seat 702. At this time, the outer surface of the plastic product 4 can contact the first ball bearing seat 703, and its inner surface can contact the second ball bearing seat 708. At this time, by the operation of the second motor 506, the suction cup 514 can drive the plastic product 4 to rotate, which allows the first ball bearing seat 703 and the second ball bearing seat 708 to rotate. The surface of the plastic product 4 slides, and the first ball bearing seat 703 is supported by the first return spring 706. If the surface smoothness of the plastic product 4 is low, when the first ball bearing seat 703 moves to a position with large unevenness, it will be squeezed or popped out of the surface of the plastic product 4 due to the support of the first return spring 706. The first pressing seat 704 at the bottom of the first ball bearing seat 703 is in contact with the first pressure-sensitive seat 705. When the first ball bearing seat 703 moves through a position with large unevenness on the surface of the plastic product 4, the pressure value of the first pressing seat 704 on the first pressure-sensitive seat 705 will change significantly.

[0039] Finally, when the first pressure-sensitive seat 705 senses a significant pressure change at the same point during the continuous rotation of the plastic product 4, the device will activate the first laser rangefinder 712. During the next rotation, the plastic product 4 will align the point sensing the pressure change with the first laser rangefinder 712. At this point, the first laser rangefinder 712 will work, using multi-point laser ranging to determine if there is a significant unevenness or protrusion at that point. Through the cooperation of the first laser rangefinder 712 and the first ball bearing seat 703, the device can quickly locate uneven or protruding positions using the first ball bearing seat 703, and then accurately detect these positions using the first laser rangefinder 712. This design enables the device to efficiently and accurately locate uneven or protruding points. The equipment is designed to better suit the inspection of large-scale plastic products 4. The inspection principle of the second ball bearing seat 708 and the second laser distance meter 713 inside the inner liner 707 is the same as that of the first laser distance meter 712 and the first ball bearing seat 703. This allows the equipment to inspect the inner contour dimension accuracy while simultaneously inspecting the outer contour dimension accuracy of the plastic product 4, and the two inspection processes do not interfere with each other. This further improves the inspection efficiency of the equipment. After the equipment has completed the inspection of the plastic product 4, it can move the inspected plastic product 4 to the sorting conveyor belt 8. The sorting conveyor belt 8 is equipped with two conveyor lines, which allows the equipment to move the plastic product 4 to different conveyor lines according to the inspection results.

[0040] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A novel optical method-based device for pinpoint detection of plastic products, characterized in that, The system includes a testing platform (1), a first conveyor belt (2) is mounted on the top outer end of the testing platform (1), and a limiting plate (3) is mounted on the top outer end of the first conveyor belt (2). A plastic product (4) is mounted on the top of the first conveyor belt (2). A conveying assembly (5) is mounted on the top middle of the testing platform (1). The conveying assembly (5) includes a first motor (501), a rotating seat (502) is mounted on the output end of the first motor (501), rotating arms (503) are mounted on both outer ends of the rotating seat (502), an electric push rod (504) is mounted on the bottom end of the rotating arm (503), a suction pump (505) is mounted on the bottom end of the electric push rod (504), and a second motor (506) is fixed on the outer end of the suction pump (505). A rotating... A rotating shaft (507) is provided with a ventilation groove (508) at its outer end and a through groove (509) at its inner middle end. An inner ring seat (510) is sleeved on the outer end of the rotating shaft (507) and an outer ring seat (511) is provided on the outer end of the inner ring seat (510). A pressure sensing spring (512) is provided between the inner ring seat (510) and the outer ring seat (511). A suction pipe (513) is fixed between the outer ring seat (511) and the suction pump (505). A suction cup (514) is provided at the bottom end of the rotating shaft (507). An infrared light detector (6) is fixed at the front outer end of the detection platform (1). A detection component (7) is provided at the top outer end of the detection platform (1). A sorting conveyor belt (8) is provided at the top rear end of the detection platform (1).

2. The fixed-point detection device for new material plastic products based on optical means according to claim 1, characterized in that, The limiting plate (3) is attached to the plastic product (4), and when the limiting plate (3) and the plastic product (4) are attached, the vertical center line of the plastic product (4) and the suction cup (514) coincide with each other.

3. The fixed-point detection device for new material plastic products based on optical means according to claim 1, characterized in that, The inner ring seat (510) is connected to the outer ring seat (511) through a pressure sensing spring (512), and the outer ring seat (511) is fixedly connected to the suction tube (513).

4. The fixed-point detection device for new material plastic products based on optical means according to claim 1, characterized in that, The suction pump (505) is connected to the outer ring seat (511) through the suction pipe (513), and the outer ring seat (511) is connected to the suction cup (514) through the ventilation groove (508) and the through groove (509).

5. The fixed-point detection device for new material plastic products based on optical means according to claim 1, characterized in that, The electric actuator (504) drives the suction cup (514) to rise and fall, and the suction cup (514) is adsorbed and fixed to the plastic product (4).

6. The fixed-point detection device for new material plastic products based on optical means according to claim 1, characterized in that, The detection assembly (7) includes a lifting platform (701), a detection seat (702) is disposed at the top outer end of the lifting platform (701), a first ball bearing seat (703) is disposed inside the detection seat (702), a first pressing seat (704) is disposed at the bottom outer end of the first ball bearing seat (703), a first pressure-sensitive seat (705) is disposed inside the detection seat (702), and a first return spring (706) is disposed between the detection seat (702) and the first ball bearing seat (703). An inner pressure-sensitive seat (705) is disposed inside the detection seat (702). The inner liner (707) has a second ball bearing seat (708) inside, a second pressing seat (709) at the bottom of the second ball bearing seat (708), a second pressure-sensitive seat (710) inside the inner liner (707), a second return spring (711) between the inner liner (707) and the second ball bearing seat (708), a first laser rangefinder (712) inside the detection seat (702), and a second laser rangefinder (713) inside the inner liner (707).

7. The fixed-point detection device for new material plastic products based on optical means according to claim 6, characterized in that, The first ball bearing seat (703) is attached to the outer surface of the plastic product (4), and the second ball bearing seat (708) is attached to the inner surface of the plastic product (4).

8. The fixed-point detection device for new material plastic products based on optical means according to claim 6, characterized in that, The first ball bearing seat (703) is elastically connected to the first return spring (706), and the first pressing seat (704) is in contact with the first pressure-sensitive seat (705).

9. A fixed-point detection device for new material plastic products based on optical means according to claim 6, characterized in that, The second ball bearing seat (708) is elastically connected to the second return spring (711), and the second pressing seat (709) is in contact with the second pressure-sensitive seat (710).

10. A fixed-point detection device for new material plastic products based on optical means according to claim 6, characterized in that, The first laser rangefinder (712) faces the outer surface of the plastic product (4), and the second laser rangefinder (713) faces the inner surface of the plastic product (4).

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