A glass bottle wall thickness uniformity detection device and detection method

Abstract

The application discloses a glass bottle wall thickness uniformity detection device and a detection method in the technical field of glass product production detection equipment. The device comprises a rotating positioning mechanism and a laser detection mechanism. The rotating positioning mechanism has a positioning axis extending in a first direction and is used to drive the coaxial rotation of the glass bottle. The laser detection mechanism comprises a laser emitting assembly and a laser receiving assembly. The detection light forms an entry section, a refraction section, a reflection section and an exit section in sequence. The laser receiving assembly is used to receive and monitor the detection light emitted from the glass bottle. The detection method comprises the following steps: controlling the detection light to enter the glass bottle at a preset angle, so that the detection light is refracted into the bottle wall and then totally reflected from the inner wall, while the glass bottle is rotated around its own axis and the change of the reflected light is monitored to monitor the change of the wall thickness. The application realizes the non-contact online detection of the wall thickness uniformity of the glass bottle, is especially suitable for narrow-mouth glass bottles, has high measurement accuracy and high efficiency, and can effectively guide the optimization of the production process.

Description

Technical Field

[0001] This invention relates to the field of glass product manufacturing and testing equipment, and in particular to a glass bottle wall thickness uniformity testing device and testing method. Background Technology

[0002] Everyday glass bottles are widely used in the packaging of food, pharmaceuticals, and cosmetics. The uniformity of their wall thickness directly affects product safety, user experience, and brand quality. During the production process, process parameters in multiple stages such as melting, molding, and annealing, as well as mold parameters such as transition curvature and volume ratio in cavity design, are interdependent. Any fluctuation can lead to uneven wall thickness. Therefore, it is necessary to accurately measure the prototypes to guide process optimization.

[0003] Current mainstream measurement methods have significant shortcomings: manual vernier calipers have low accuracy and efficiency, and are difficult to insert into narrow-necked bottles; contact ultrasonic thickness gauges require coupling agents, which easily contaminate the bottle, and their accuracy is limited for thin-walled bottles, making them unsuitable for online inspection; other contact sensors are similarly limited by narrow bottle openings, with probes unable to reach the inner wall and potentially scratching the inner surface. These defects lead to delayed measurement results, making full inspection difficult, and severely restricting quality control and process improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a glass bottle wall thickness uniformity detection device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: A glass bottle wall thickness uniformity detection device according to a first aspect of the present invention includes: a rotation positioning mechanism and a laser detection mechanism; The laser detection mechanism includes a laser emitting component and a laser receiving component. The laser emitting component is used to emit detection light towards the glass bottle to be detected. The detection light forms a detection optical path, which includes an incident section, a refraction section, a reflection section, and an exit section. The incident section emits laser light from the laser emitting component toward the outer wall of the glass bottle; the refractive section refracts the light from the outer wall of the glass bottle and then emits it toward the inner wall of the glass bottle; the reflective section reflects the light from the inner wall of the glass bottle and then emits it toward the outer wall of the glass bottle; and the exiting section emits the light from the outer wall of the glass bottle. The injection section is set at an angle to the radial direction of the glass bottle. The injection section, refraction section, reflection section and emission section are connected end to end in sequence. The laser receiving component is used to receive and monitor the emission section.

[0006] The glass bottle wall thickness uniformity detection device provided by this invention has at least the following beneficial effects: Automatic rotational positioning of the glass bottle is achieved through a rotary positioning mechanism, allowing the bottle to rotate coaxially around the positioning axis, thereby enabling continuous measurement of the wall thickness at various angles along the circumference of the bottle. The laser detection mechanism utilizes the principle of light refraction and reflection within the glass bottle wall, enabling the acquisition of wall thickness information without contact with the inner wall of the bottle, fundamentally solving the problem of probes being difficult to insert into narrow-mouthed glass bottles in traditional contact measurements. The detection optical path consists of an incident section, a refraction section, a reflection section, and an exit section connected end-to-end. The laser receiving component receives the emitted light and monitors its positional changes to obtain wall thickness information in real time. This solution achieves non-contact measurement of glass bottle wall thickness uniformity, avoiding the risk of coupling agent contamination and scratches on the inner surface of the bottle. It offers high measurement accuracy and fast response speed, providing a feasible technical path for online full inspection, and can achieve closed-loop process control through data linkage with the production line control system.

[0007] As a further improvement to the above technical solution, the incident angle of the reflective segment relative to the inner wall of the glass bottle is greater than the critical angle of the glass bottle, where the critical angle is the incident angle when the angle of refraction of light from the glass bottle into the air reaches 90°.

[0008] As a further improvement to the above technical solution, the detection light is perpendicular to the positioning axis, and the injection segment, refraction segment, reflection segment and emission segment are all located in the same plane perpendicular to the positioning axis.

[0009] As a further improvement to the above technical solution, the number of laser emitting components is multiple, and the multiple laser emitting components are arranged along the first direction. The laser receiving components are arranged in a one-to-one correspondence with the laser emitting components, or the laser receiving components synchronously receive and monitor the detection light from the multiple laser emitting components.

[0010] As a further improvement to the above technical solution, the rotary positioning mechanism includes a rotary drive unit and a plurality of rotary positioning components. Each rotary positioning component is rotatably provided with a rotary positioning element. The rotary positioning element has a rotation axis extending along the first direction. The plurality of rotary positioning components are arranged along an arc path. The arc path is coaxially arranged with the positioning axis on a plane perpendicular to the first direction. The rotary positioning element rolls against the outer surface of the glass bottle. The rotary drive unit is used to drive at least one of the rotary positioning elements to rotate.

[0011] As a further improvement to the above technical solution, the first direction is inclined or perpendicular to the vertical direction, at least two of the rotary positioning components are evenly arranged around the positioning axis on the lower side of the positioning axis, and the rotary positioning components are radially adjustable along the arc path.

[0012] As a further improvement to the above technical solution, the rotary positioning mechanism further includes a limiting plate, which is disposed on one or both sides of the axial direction of the positioning axis, and the limiting plate and the plurality of rotary positioning components are offset from each other in the first direction.

[0013] As a further improvement to the above technical solution, the two limiting plates are respectively disposed on both sides of the glass bottle along the positioning axis, both limiting plates are rotatably disposed around the positioning axis, and at least one of the limiting plates is elastically adjustable.

[0014] A method for detecting the uniformity of glass bottle wall thickness according to a second aspect of the present invention includes: The detection light is controlled to enter the glass bottle to be tested at a preset angle, so that the detection light is refracted into the outer wall of the glass bottle, and then undergoes total internal reflection with the inner wall of the glass bottle before being emitted to the outside. The glass bottle is rotated around its own axis while the emission segment of the detection light emitted from the glass bottle is monitored. The change in the thickness of the glass bottle is monitored by the change in the emission segment.

[0015] The detection method of this invention utilizes the principle of total internal reflection to indirectly measure the wall thickness of glass bottles. The detection light enters the bottle wall at a preset angle, undergoes total internal reflection within the inner wall, and then exits. By monitoring changes in the reflected light, the wall thickness information can be reflected in real time. The entire detection process eliminates the need for any contact probes to penetrate the bottle, completely avoiding the technical bottleneck of measuring the inner wall of narrow-mouthed glass bottles. By rotating the glass bottle around its own axis while simultaneously monitoring the reflected light, continuous dynamic scanning of the circumferential wall thickness distribution can be achieved. A single rotation is sufficient to acquire complete circumferential wall thickness uniformity data, resulting in detection efficiency far exceeding traditional point-by-point measurement methods. The reflected light is highly sensitive to changes in wall thickness, capable of capturing minute fluctuations, providing reliable data support for accurate evaluation of wall thickness uniformity and precise adjustment of molding process parameters.

[0016] As a further improvement to the above technical solution, the preset angle is set according to the size and refractive index of the glass bottle. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a front view of an embodiment of the glass bottle wall thickness uniformity detection device provided by the present invention. Figure 2 This is a schematic diagram of an embodiment of the laser detection mechanism and detection optical path provided by the present invention; Figure 3 This is a three-dimensional schematic diagram of an embodiment of the glass bottle wall thickness uniformity detection device provided by the present invention; Figure 4 The present invention provides a rotary positioning mechanism, and one embodiment of its transmitter head; Figure 5 This is a side sectional view of an embodiment of the rotary positioning mechanism provided by the present invention; Figure 6 yes Figure 5 A magnified view of a portion of the T-region; Figure 7 This is a front sectional view of an embodiment of the rotary positioning mechanism provided by the present invention; Figure 8 This is a top sectional view of an embodiment of the rotary positioning mechanism provided by the present invention; Figure 9 This is a schematic diagram of an embodiment of the detection optical path provided by the present invention. Figure 1 ; Figure 10 This is a schematic diagram of an embodiment of the detection optical path provided by the present invention. Figure 2 ; Figure 11 This is a schematic diagram of an embodiment of the detection optical path provided by the present invention. Figure 3 ; Figure 12 This is a schematic diagram of an embodiment of the detection optical path provided by the present invention. Figure 4 .

[0018] In the diagram: 10-Rotational positioning mechanism, 20-Laser detection mechanism, 30-Detection optical path, 31-Injection section, 32-Refraction section, 33-Reflection section, 34-Emission section, 100-Laser emitting assembly, 200-Laser receiving assembly, 210-Vision panel, 220-CCD vision unit, 300-Rotational positioning assembly, 310-Rotational positioning component, 320-Connecting block, 330-Base, 331-Guide post, 332-Mounting plate, 333-Drive plate, 334-Firming. Spring, 400-base frame, 410-middle plate, 420-vertical plate, 500-diameter adjustment assembly, 510-lifting component, 511-lifting ramp, 520-drive rod, 530-adjusting transmission component, 531-transmission gear, 532-transmission rack, 600-axial limiting assembly, 610-front limiting turntable, 620-rear clamping plate, 630-connecting sleeve, 631-limiting screw, 640-tightening rod, 641-limiting groove, 650-limiting spring, 660-groove. Detailed Implementation

[0019] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 12 The glass bottle wall thickness uniformity detection device of the present invention is provided in the following embodiment: A glass bottle wall thickness uniformity detection device includes: a rotation positioning mechanism 10 and a laser detection mechanism 20.

[0024] The rotary positioning mechanism 10 has a positioning axis extending along a first direction, and the rotary positioning mechanism 10 is used to drive the glass bottle to be tested to rotate coaxially around the positioning axis. The laser detection mechanism 20 includes a laser emitting assembly 100 and a laser receiving assembly 200. The laser emitting assembly 100 is used to emit detection light towards the glass bottle to be tested. The detection light forms a detection optical path 30 that extends in a zigzag pattern.

[0025] like Figure 2 As shown, the detection optical path 30 includes: an injection section 31 that emits from the laser emitting component 100 to the outer wall of the glass bottle before entering the glass bottle; a refraction section 32 that refracts from the outer wall of the glass bottle and then enters the glass bottle wall; a reflection section 33 that reflects from the inner wall surface of the glass bottle and then moves towards the outer wall of the glass bottle; and an emission section 34 that refracts from the outer wall of the glass bottle.

[0026] The injection segment 31 emits laser light from the laser emitting assembly 100 toward the outer wall of the glass bottle; the refraction segment 32 refracts the light from the outer wall of the glass bottle and then emits it toward the inner wall of the glass bottle; the reflection segment 33 reflects the light from the inner wall of the glass bottle and then emits it toward the outer wall of the glass bottle; and the emission segment 34 refracts the light from the outer wall of the glass bottle and then emits it.

[0027] The incident section 31 is arranged at an angle to the radial direction of the glass bottle. The incident section 31, the refraction section 32, the reflection section 33, and the exit section 34 are connected end to end in sequence. The laser receiving component 200 is used to receive and monitor the detection light.

[0028] In practical use, the rotating positioning mechanism 10 enables automatic rotation and positioning of the glass bottle, allowing the bottle to rotate coaxially around the positioning axis, thus achieving continuous measurement of the bottle's wall thickness at various angles in the circumference of the bottle. The laser detection mechanism 20 utilizes the principle of light refraction in the glass bottle wall and reflection from the inner wall, enabling the acquisition of wall thickness information without contact with the inner wall of the bottle, fundamentally solving the problem of probes being difficult to insert into narrow-mouthed glass bottles in traditional contact measurements. The detection optical path 30 consists of an injection section 31, a refraction section 32, a reflection section 33, and an emission section 34 connected end to end to form an optical path. The laser receiving component 200 receives the emitted light and monitors its position changes to obtain wall thickness information in real time. This solution achieves non-contact measurement of the uniformity of glass bottle wall thickness, avoiding the risk of coupling agent contamination and scratches on the inner surface of the bottle. It offers high measurement accuracy and fast response speed, providing a feasible technical path for online full inspection, and can achieve closed-loop process control through data linkage with the production line control system.

[0029] In this embodiment, the incident angle of the reflective segment 33 relative to the inner wall of the glass bottle is greater than the critical angle of the glass bottle. By setting the incident angle of the light from the reflective segment 33 relative to the inner wall of the glass bottle to be greater than the critical angle of the glass bottle, the detection light undergoes total internal reflection at the inner wall surface of the glass bottle.

[0030] Under total internal reflection, the energy of the reflected light is returned almost entirely without loss. The laser receiving component 200 can obtain a reflected signal with an extremely high signal-to-noise ratio, significantly improving the sensitivity and accuracy of wall thickness detection. Simultaneously, total internal reflection is extremely sensitive to the angle of incidence of the light. When a change in wall thickness causes a slight shift in the angle of the refracted light path, the receiving position and intensity of the reflected light will change significantly. This transforms the minute difference in wall thickness into an easily detectable change in optical signal, achieving high-resolution wall thickness measurement and effectively ensuring the accurate identification of subtle differences in wall thickness uniformity.

[0031] In an embodiment of the present invention, the detection light is perpendicular to the positioning axis, and the incident section 31, the refraction section 32, the reflection section 33 and the exit section 34 are all located in the same plane perpendicular to the positioning axis.

[0032] By setting the detection light to be perpendicular to the positioning axis and placing the entire detection light path 30 in the same plane perpendicular to the positioning axis, the detection light propagates in the direction of glass bottle wall thickness. The optical path geometry is clear and simple, which facilitates the quantitative calculation and calibration of the wall thickness value.

[0033] This planar optical path layout reduces the debugging difficulty of the optical system. At the same time, during the rotation of the glass bottle around the positioning axis, the detection optical path 30 can stably perform circumferential scanning of the wall thickness on the same height section of the bottle, which is conducive to establishing a unified wall thickness measurement benchmark, ensuring the repeatability and comparability of measurement data, and also facilitating layered measurement of different height sections to achieve a comprehensive evaluation of wall thickness uniformity.

[0034] The rotary positioning mechanism 10 of this embodiment includes a rotary drive unit and a plurality of rotary positioning components 300. Each rotary positioning component 300 is rotatably provided with a rotary positioning element 310. The rotary positioning element 310 has a rotation axis extending along the first direction. The rotary positioning element 310 is used to roll against the outer surface of the glass bottle. The rotary drive unit is used to drive at least one of the rotary positioning elements 310 to rotate.

[0035] The rotary positioning mechanism 10 uses multiple rotary positioning components 300 equipped with rotary positioning elements 310 to support and position the glass bottle. The rotary positioning elements 310 roll against the outer surface of the glass bottle, which not only achieves reliable positioning constraint of the bottle, but also avoids scratches or deformations that may be caused to the bottle by traditional clamps through the rolling contact method.

[0036] The rotary drive unit drives at least one rotary positioning component 310 to rotate actively, causing the glass bottle to rotate smoothly around its own axis through rolling friction. At the same time, the other rotary positioning components 310 cooperate to ensure smooth rotation and accurate positioning of the bottle. This structural design is simple and reliable, avoiding complex pneumatic or mechanical clamping mechanisms, reducing equipment manufacturing costs and maintenance difficulty, while providing a stable rotary drive foundation for continuous online inspection of glass bottles.

[0037] The plurality of rotary positioning components 300 are arranged along an arc path, which is coaxial with the positioning axis on a plane perpendicular to the first direction. Furthermore, the plurality of rotary positioning components 300 are radially adjustable along the arc path.

[0038] Multiple rotary positioning components 300 are arranged along an arc path coaxial with the positioning axis, allowing each rotary positioning component 310 to provide support and positioning for the glass bottle from different directions. This forms a stable multi-point support configuration, effectively constraining the glass bottle's radial degree of freedom and ensuring that the positioning axis does not shift during bottle rotation. This guarantees the relative positional accuracy between the detection optical path 30 and the bottle. Simultaneously, the rotary positioning components 300 are radially adjustable along the arc path, allowing the support structure to adapt to glass bottles of different diameters. When changing product models, there is no need to replace the positioning components; simple adjustments are sufficient for adaptation. This further enhances the device's versatility and ease of operation, reducing downtime during production changeovers.

[0039] The first direction is inclined or perpendicular to the vertical direction, and at least two of the rotary positioning components 300 are evenly arranged around the positioning axis on the lower side of the positioning axis.

[0040] By setting the first direction to be inclined or perpendicular to the vertical direction, the glass bottle is inspected in a horizontal or inclined posture, reducing the height of the center of gravity and instability of the bottle during rotation. This is especially suitable for the smooth rotation inspection of tall, narrow, or irregularly shaped glass bottles. At least two rotary positioning components 300 are evenly arranged below the positioning axis, using gravity to achieve self-stabilizing support for the glass bottle. Under its own weight, the glass bottle can press firmly against the rotary positioning components 300 on the lower side, ensuring reliable contact between the bottle and each rotary positioning component 310 even without additional clamping force, effectively preventing the bottle from jumping or shifting during rotation.

[0041] In this embodiment, the rotary positioning mechanism 10 has a detection station with a positioning axis extending front to back. It is worth noting that both the detection station and the positioning axis are virtual features, set up to facilitate accurate description of the glass bottle wall thickness uniformity detection device.

[0042] See attached document Figures 3 to 7 The rotary positioning assembly 300 comprises two components, which are symmetrically arranged on the lower side of the detection station. Each rotary positioning assembly 300 includes multiple rotary positioning elements 310. The rotation axis of each rotary positioning element 310 extends along a first direction, and the rotary positioning elements 310 are arranged in pairs at intervals. In this embodiment, the rotary positioning elements 310 are rollers, and multiple rotary positioning elements 310 are arranged coaxially to roll and abut against the glass bottle at different height positions. In other embodiments, the rotary positioning elements 310 may be rollers, and a single rotary positioning element 310 can form a large-scale rolling contact along the height direction of the glass bottle.

[0043] To ensure that the two paired rotary positioning elements 310 can simultaneously roll and abut against the glass bottles in the inspection station, the rotary positioning assembly 300 further includes a base 330 and a connecting block 320. The connecting block 320 has a hinged end and two mounting portions. The two rotary positioning elements 310 are rotatably mounted on the mounting portions, and the hinged end is rotatably hinged to the base 330. The rotation axes of the connecting block 320 and the two rotary positioning elements 310 thereon are parallel to the positioning axis. Taking the front-back direction as an example in this embodiment, the rotation axes of the connecting block 320 and the two rotary positioning elements 310 thereon extend along the front-back direction.

[0044] To facilitate control of the glass bottle's rotation speed and accuracy, the rotation positioning component 300 in this embodiment employs a miniature servo motor. In other embodiments, the rotation drive unit may also employ rotation drive components such as a rotary cylinder, servo motor, stepper motor, or pneumatic motor.

[0045] In some other embodiments, the rotary positioning assembly 300 includes a roller-shaped rotary positioning element 310, and the output shaft of the rotary drive unit is connected to the rotary positioning element 310 to drive it to rotate, thereby causing the glass bottle to rotate. Alternatively, the rotary positioning assembly 300 includes multiple coaxially arranged, roller-shaped rotary positioning elements 310, which are interconnected by a coaxially passing shaft. The rotary drive unit drives the shaft to rotate, thereby causing the multiple rotary positioning elements 310 to rotate.

[0046] In the rotary positioning assembly 300 of this embodiment, two rotary positioning members 310 arranged in pairs are installed on two mounting parts of the connecting block 320. The distance between the two mounting parts and the hinge end is the same. The hinge end of the connecting block 320 is rotatably provided with a drive gear. The two mounting parts are provided with driven gears. The driven gears are coaxially fixed to the rotary positioning members 310. Both driven gears are driven and meshed with the drive gear. The rotary drive unit drives the two rotary positioning members 310 to rotate synchronously through the meshing of the drive gear and the transmission gear 531.

[0047] A rotating positioning component is defined by a connecting block 320 and two rotating positioning elements 310 thereon. In this embodiment, the rotating positioning assembly 300 is provided with multiple rotating positioning components, and the connecting blocks 320 of these components are fixedly connected to each other, allowing the rotating positioning elements 310 of different rotating positioning components to overlap and align with each other in the front-to-back direction, while simultaneously rolling against the glass bottle. The rotating drive unit can rotate a drive shaft passing through the multiple rotating positioning components, synchronously driving two rotating positioning elements 310 to rotate through the meshing of the drive gear and transmission gear 531. Besides gear transmission, other transmission methods such as belt drive, chain drive, or worm gear drive can also be used in some other embodiments.

[0048] Alternatively, the rotary positioning element 310 of one or more rotary positioning components can be connected to the rotary drive unit via a transmission connection. Furthermore, the rotary drive unit and the rotary positioning component can be in a one-to-one correspondence, or one rotary drive unit can synchronously drive multiple rotary positioning components.

[0049] The base 330 of the two rotary positioning components is provided with multiple guide posts 331. These guide posts 331 are spaced apart along the front-to-back direction and extend radially from the glass bottle, i.e., perpendicular to the positioning axis. The guide posts 331 slidably pass through the base frame 400 to achieve a sliding connection between the rotary positioning components and the base frame 400. The base frame 400 is provided with linear bearings or bushings corresponding to each guide post 331.

[0050] See attached document Figure 7 The base frame 400 is provided with a middle plate 410, and the base 330 includes a mounting plate 332 and a drive plate 333. In the front-rear projection, the guide post 331 and the middle plate 410 are both located between the mounting plate 332 and the drive plate 333. Multiple connecting blocks 320 and rotary positioning components are mounted on the mounting plate 332. The guide post 331 slides through the middle plate 410.

[0051] To achieve synchronous adjustment of the two rotary positioning components 300, the rotary positioning mechanism 10 further includes a diameter adjustment component 500, which includes a lifting member 510, a drive rod 520, and an adjustment transmission component 530. The drive rod 520 extends in the front-rear direction and rotatably passes through the base frame 400. The lifting members 510 are arranged in pairs on the left and right sides of the drive rod 520, and the paired lifting members 510 correspond to the two rotary positioning components 300 respectively. The upper end of the lifting member 510 is provided with a lifting inclined surface 511 inclined to the left and right direction, and the drive plates 333 of the two rotary positioning components 300 abut against the lifting inclined surface 511.

[0052] The adjusting transmission component 530 in this embodiment includes a transmission gear 531 and a transmission rack 532. The transmission gear 531 is connected to the drive rod 520. The transmission rack 532 extends in the left-right direction and is connected to the lifting member 510. The lifting member 510 or the transmission rack 532 is slidably connected to the base frame 400 in the left-right direction. The transmission gear 531 and the transmission rack 532 mesh and transmit power.

[0053] It is conceivable that the axes of the transmission gear 531 and the drive rod 520 are perpendicular to each other. Therefore, the transmission connection between the transmission gear 531 and the drive rod 520 can be achieved by a pair of bevel gears or by a worm gear structure.

[0054] When the drive rod 520 is rotated, the transmission rack 532 can be driven to move left and right through the transmission gear 531, thereby synchronously driving the two lifting members 510 to move left and right, thereby lifting the two rotary positioning components 300 through the lifting inclined surface 511, and realizing the position adjustment of the two rotary positioning components 300.

[0055] In this embodiment, a clamping spring 334 is sleeved on the outer side of the guide post 331 of the rotary positioning assembly 300. The two ends of the clamping spring 334 elastically abut against the middle plate 410 and the drive plate 333, respectively, so that the base 330 has a tendency to move away from the positioning axis along its adjustable direction, that is, to press the rotary positioning assembly 300 down, so as to achieve the abutment between the drive plate 333 and the lifting inclined surface 511. In some other embodiments, the rotary positioning assembly 300 can also be pressed against the lifting member 510 by its own weight and the weight of the glass bottle. The lifting member 510 provides a limit, and the drive plate 333 abuts against the lifting member 510 rather than elastically abutting.

[0056] To ensure that the rotary positioning component 300 is subjected to uniform and balanced force, each rotary positioning component 300 is provided with a plurality of lifting members 510 on its lower side. The plurality of lifting members 510 are arranged at intervals along the front and back and all abut against the rotary positioning component 300.

[0057] Furthermore, the rotary positioning mechanism 10 is also provided with an axial limiting component 600, which includes a limiting plate. The limiting plate is located on one or both sides of the axial direction of the positioning axis, and the limiting plate and the plurality of rotary positioning components 300 are offset from each other in the first direction.

[0058] The limiting plate is set on one or both sides of the positioning axis to limit and constrain the axial position of the glass bottle, preventing the bottle from moving axially during rotation and deviating from the detection optical path 30. The limiting plate and the rotation positioning component 300 are offset from each other in the first direction to avoid structural interference, so that the limiting plate can be close to the end of the bottle for precise positioning without affecting the normal support function of the rotation positioning component 300, further improving the reliability of the device operation and the stability of the detection data.

[0059] In this embodiment, the first direction extends horizontally. When the glass bottle is in the testing station, the bottom of the bottle faces forward and the mouth faces backward. Limiting plates are provided on both the front and rear sides of the testing station. The two limiting plates are a front limiting turntable 610 and a rear pressing plate 620, both of which are rotatably arranged around the positioning axis. The rear pressing plate 620 is elastically arranged backward. When the glass bottle is placed in the testing station, the rear pressing plate 620 can elastically press against the bottle mouth, while the bottle bottom can press against the front limiting turntable 610. During the testing process, when the glass bottle rotates, the rear pressing plate 620 can press it against the front limiting turntable 610, and both the front limiting turntable 610 and the rear pressing plate 620 rotate synchronously with the glass bottle, without relative displacement.

[0060] See attached document Figure 5 The glass bottle wall thickness uniformity detection device is provided with a base frame 400, which has two upright plates 420 arranged at a front-to-back interval. The front limiting turntable 610 and the rear pressing plate 620 are located between the two upright plates 420. The front limiting turntable 610 and the rear pressing plate 620 are rotatably connected to the two upright plates 420 respectively.

[0061] Furthermore, in order to accommodate glass bottles of different heights and specifications, and to avoid uncontrollable pressure on the glass bottles due to dimensional errors, the rear clamping plate 620 is elastically adjustable in the front-to-back direction.

[0062] Specifically, such as Figure 6 As shown, the axial limiting assembly 600 further includes a connecting sleeve 630, a clamping rod 640, and a limiting spring 650. The connecting sleeve 630 is provided on the rear upright plate 420, and the connecting sleeve 630 is threaded through the upright plate 420. The front end of the connecting sleeve 630 slides through the clamping rod 640 in the front-rear direction. The limiting spring 650 is provided between the clamping rod 640 and the connecting sleeve 630 to allow the clamping rod 640 and the connecting sleeve 630 to be elastically connected, thereby giving the clamping rod 640 a tendency to move forward relative to the connecting sleeve 630. The connecting sleeve 630 has a limiting groove 641 extending front-rear, and the clamping rod 640 is fitted with a limiting screw 631, which is threaded through the clamping rod 640 and extends into the limiting groove 641. The rear clamping plate 620 is located on the front side of the clamping rod 640 and is rotatably connected to the clamping rod 640.

[0063] In this embodiment, the front end of the connecting sleeve 630 is cylindrical, and the rear end of the tightening rod 640 is slidably inserted into the connecting sleeve 630. In other embodiments, the sliding fit between the connecting sleeve 630 and the tightening rod 640 may be the opposite of this embodiment. Furthermore, the limiting structure formed by the limiting groove 641 and the limiting screw 631 can restrict movement and may also be respectively provided in the connecting sleeve 630 and the tightening rod 640. In this embodiment, both the front limiting turntable 610 and the rear pressing plate 620 are flat. In some embodiments, the front limiting turntable 610 and the rear pressing plate 620 may be provided with grooves 660 facing the glass bottle. In actual use, the bottle mouth or bottom of the glass bottle is embedded in the grooves 660, forming axial and radial limiting. Further, both the front limiting turntable 610 and the rear pressing plate 620 are provided with multiple grooves 660 of different diameters. The multiple grooves 660 are arranged sequentially in order of diameter towards the glass bottle, so that the grooves 660 on the side of the front limiting turntable 610 and the rear pressing plate 620 that are far apart have smaller diameters. The multiple grooves 660 form multiple annular support surfaces with different outer diameters, which can support the bottom surface of the glass bottle, and the sidewalls of the grooves 660 can limit the outer wall of the bottle bottom. The grooves 660 of different diameters are arranged in sequence to accommodate bottle bottoms and mouths of different diameters. When replacing large-sized glass bottles, there is no need to replace the front limit turntable 610 and the rear clamping plate 620.

[0064] In this embodiment, for ease of adjustment, the end of the drive rod 520 of the variable diameter adjustment assembly 500 passes through the rear side of the base frame 400, and the connecting sleeve 630 is threadedly connected to the base frame 400. In the axial limiting assembly 600, the rear end of the connecting sleeve 630 is also located on the rear side of the base frame 400. The rear ends of both the drive rod 520 and the connecting sleeve 630 are provided with knobs, handwheels, or anti-slip knurling for turning.

[0065] In the foregoing embodiment, the rotary drive unit is used to drive the rotary positioning element 310 in the rotary positioning assembly 300 to rotate, thereby causing the glass bottle to rotate. Based on the aforementioned front limiting turntable 610 and rear clamping plate 620 structure, the rotary drive unit can also be used to drive the front limiting turntable 610 to rotate. After the front limiting turntable 610 and the rear clamping plate 620 coaxially clamp the glass bottle in the axial direction, the glass bottle is driven to rotate through the front limiting turntable 610. The rotary positioning element 310 in the rotary positioning assembly 300 only provides rolling support.

[0066] Furthermore, there are multiple laser emitting components 100 and laser receiving components 200, with the multiple laser emitting components 100 arranged along the first direction, and the laser receiving components 200 corresponding to each of the laser emitting components 100. Alternatively, the laser receiving components 200 can synchronously receive and monitor the detection light from the multiple laser emitting components 100.

[0067] By arranging multiple laser emitting components 100 and corresponding laser receiving components 200 along a first direction, the device can simultaneously measure the wall thickness of multiple cross-sections at different heights of the glass bottle. This multi-point parallel detection method significantly improves detection efficiency, acquiring circumferential wall thickness distribution data at multiple axial positions of the bottle body during a single bottle rotation, thereby constructing a three-dimensional evaluation system for the overall wall thickness uniformity of the glass bottle. This technical solution effectively solves the cumbersome problem of repeatedly raising and lowering the detection position required in single-point measurement methods, and is particularly suitable for production scenarios with strict detection requirements for wall thickness uniformity in different height areas of the bottle body, greatly improving detection throughput and the quality monitoring capabilities of the production line.

[0068] In this embodiment, the laser emitting component 100 is a miniature laser emitter, and the laser receiving component 200 includes a vision panel 210 and a CCD vision unit 220. The emission segment 34 of the detection light is projected onto the vision panel 210 to form a light spot. The CCD vision unit 220 monitors the position of the light spot from the other side of the vision panel 210, thereby realizing the reception and monitoring of the detection light.

[0069] By setting the positions of the vision panel 210 and the CCD vision unit 220, the reflection segments 33 of the detection light from multiple laser emitting components 100 can all fall on the vision panel 210 and into the imaging range of the CCD vision unit 220, thus enabling synchronous reception and monitoring of multiple laser emitting components 100.

[0070] In some other embodiments, the laser receiving component 200 may be a miniature receiver, with the laser receiving component 200 and the laser emitting component 100 arranged one-to-one and respectively located on the theoretical path of the reflection segment 33 of each detected light beam, so as to receive and monitor the light beam based on the reception status.

[0071] Specifically, in this embodiment, the base frame 400 is provided with a left support and a right support, which are respectively located on the left and right sides of the base frame 400. The left support and the right support are used to install the laser emitting assembly 100 and the laser receiving assembly 200, respectively. The specific structure of the left support and the right support can be set according to the specific model and specifications of the laser emitter and the vision unit, and this application does not make specific limitations or examples.

[0072] Both the laser emitting component 100 and the laser receiving component 200 are adjustable. The adjustable configuration of both components allows the device to flexibly adjust the position and angle of the detection optical path 30 according to glass bottles of different sizes and diameters, ensuring that the detection light beam enters the bottle wall under optimal incident conditions and forms a stable total internal reflection optical path.

[0073] This setup significantly enhances the versatility and adaptability of the device. The same equipment can meet the wall thickness detection needs of glass bottles of various types and sizes without the need to customize detection fixtures or optical systems for each product. This effectively reduces equipment investment costs and improves the flexibility of production line changes and equipment utilization.

[0074] This invention also provides a method for detecting the uniformity of glass bottle wall thickness, comprising: controlling a detection light beam to enter the glass bottle to be tested at a preset angle, so that the detection light beam is refracted into the glass bottle wall, undergoes total internal reflection with the inner wall of the glass bottle, and is then emitted to the outside. The glass bottle is rotated around its own axis while the reflected light emitted from the glass bottle is monitored. The change in the thickness of the glass bottle is monitored by the change in the reflected light.

[0075] See attached document Figure 9 The detection light is refracted into the glass bottle wall and then emitted after total internal reflection with the inner wall of the glass bottle. Specifically, the detection light forms a detection optical path 30, which includes an injection section 31, a refraction section 32, a reflection section 33, and an emission section 34.

[0076] The injection segment 31 emits laser light from the laser emitting component 100 to the outer wall of the glass bottle. The refraction segment 32 refracts the light from the outer wall of the glass bottle and then injects it into the glass bottle wall. The reflection segment 33 reflects the light from the inner wall of the glass bottle and then injects it towards the outer wall of the glass bottle. The emission segment 34 refracts the light from inside the glass bottle and then emits it out.

[0077] The proposed detection method utilizes the principle of total internal reflection to indirectly measure the wall thickness of glass bottles. The detection light, after entering the bottle wall at a preset angle, undergoes total internal reflection within the inner wall and exits. By monitoring changes in the reflected light, the wall thickness information can be obtained in real time. The entire detection process eliminates the need for any contact probes to penetrate the bottle, completely avoiding the technical bottleneck of measuring the inner wall of narrow-mouthed glass bottles. By rotating the glass bottle around its own axis and simultaneously monitoring the reflected light, continuous dynamic scanning of the circumferential wall thickness distribution can be achieved. A single rotation is sufficient to acquire complete circumferential wall thickness uniformity data, resulting in detection efficiency far exceeding traditional point-by-point measurement methods. The reflected light is highly sensitive to changes in wall thickness, capable of capturing minute fluctuations, providing reliable data support for accurate evaluation of wall thickness uniformity and precise adjustment of molding process parameters.

[0078] In order to enable the detection light to undergo total internal reflection with the inner wall of the glass bottle to form the detection light path 30, the preset angle is set according to the size and refractive index of the glass bottle.

[0079] The incident angle of the detection light is set according to the specific size and refractive index of the glass bottle to ensure that the detection light can enter the bottle wall at an angle that meets the conditions for total internal reflection and undergo stable total internal reflection for glass bottles of different materials, wall thicknesses, and bottle diameters.

[0080] This adaptability allows the detection method to be flexibly applied to the testing needs of various types of glass bottles, whether soda-lime glass, borosilicate glass, or other special glass materials. Optimal detection signals can be obtained by adjusting the preset angle. This technical feature further expands the applicability of the detection method, ensuring measurement accuracy and signal stability while simplifying the parameter configuration process for operators, making the method highly adaptable to various processes and worthy of widespread application.

[0081] Specifically, refer to the appendix Figure 9 Let point O be the center of the cross-section of the glass bottle, with outer diameter R and theoretical inner diameter r. Let the refractive index of the glass bottle be n.

[0082] The detection light is refracted at point A, enters the outer wall of the glass bottle, and is reflected by the inner wall of the glass bottle at point B. Finally, it is refracted out to the outside at point C.

[0083] Based on the refraction at point A, we have: ; Then, based on the total emission at point B, i.e., ∠θ is greater than the critical angle, the magnitude of the critical angle depends on the ratio of the refractive indices of the optically denser medium to the optically less dense medium. Here, we take the refractive index of the optically less dense medium, i.e., air, to be 1, therefore: ; In triangle △AOB, we have: ; Based on the above equations, we can derive: , that is .

[0084] However, as attached Figure 10 As shown, when the thickness of the glass bottle increases, the incident angle of the light in the reflective section 33 increases, which causes the light in the output section to swing downward, and the landing point of the detection light on the laser receiving component 200 moves downward relative to the standard point.

[0085] Conversely, as shown in the appendix Figure 11As shown, when the thickness of the glass bottle decreases, the incident angle of the light in the reflective section 33 decreases, which causes the light in the output section to rise, and the landing point of the detection light on the laser receiving component 200 moves upward relative to the standard point.

[0086] To ensure that the detection light still undergoes total emission when the glass bottle thickness changes (especially when the thickness decreases), a tolerance factor p needs to be added to the theoretical inner diameter of the glass bottle. This factor typically ranges from 0.85 to 0.95. Therefore, the preset angle α of the detection light is: .

[0087] In a specific embodiment, taking air inside the bottle as an example, the refractive index n of ordinary glass is about 1.5, that is, n≈1.5, so its critical angle is about 41.5° to 41.8°. Therefore, the incident angle of the reflective segment 33 relative to the inner wall of the glass bottle can be controlled at 45°.

[0088] Since total emission only occurs when light travels from an optically denser medium to an optically less dense medium, the detection light will not undergo total emission at the outer wall of the glass bottle (air entering the glass). However, referring to... Figure 12 The detection light is emitted, reflected, and refracted simultaneously on the outer wall of the glass bottle. Therefore, in the actual detection process, the laser receiving component 200 needs to avoid being affected by the reflected light from the outer wall of the glass bottle. For example, an extinction plate, diffuse reflection plate, or other extinction device can be set above the laser receiving component 200 (in the area where the reflected light falls on the outer wall).

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the invention. All such changes, modifications, equivalent alterations or substitutions are included within the scope defined by the claims of this application, and the scope of the invention is defined by the claims and their equivalents.

Claims

1. A device for detecting the uniformity of glass bottle wall thickness, characterized in that: include: A rotary positioning mechanism having a positioning axis extending along a first direction, the rotary positioning mechanism being used to drive the glass bottle to be tested to rotate coaxially around the positioning axis; A laser inspection mechanism, comprising a laser emitting component and a laser receiving component, wherein the laser emitting component is used to emit inspection light towards the glass bottle to be inspected, and the inspection light forms an inspection optical path, the inspection optical path comprising: an incident section, a refraction section, a reflection section, and an exit section; The incident section emits laser light from the laser emitting component toward the outer wall of the glass bottle; the refractive section refracts the light from the outer wall of the glass bottle and then emits it toward the inner wall of the glass bottle; the reflective section reflects the light from the inner wall of the glass bottle and then emits it toward the outer wall of the glass bottle; and the exiting section emits the light from the outer wall of the glass bottle. The injection section is set at an angle to the radial direction of the glass bottle. The injection section, refraction section, reflection section and emission section are connected end to end in sequence. The laser receiving component is used to receive and monitor the emission section.

2. The glass bottle wall thickness uniformity detection device according to claim 1, characterized in that: The incident angle of the reflective segment relative to the inner wall of the glass bottle is greater than the critical angle of the glass bottle, where the critical angle is the incident angle when the angle of refraction of light from the glass bottle into the air is 90°.

3. The glass bottle wall thickness uniformity detection device according to claim 1, characterized in that: The detection light is perpendicular to the positioning axis, and the injection segment, refraction segment, reflection segment, and emission segment are all located in the same plane perpendicular to the positioning axis.

4. The glass bottle wall thickness uniformity detection device according to claim 1, characterized in that: The number of laser emitting components is multiple, and the multiple laser emitting components are arranged along the first direction. The laser receiving components are arranged in a one-to-one correspondence with the laser emitting components, or the laser receiving components synchronously receive and monitor the detection light of the multiple laser emitting components.

5. The glass bottle wall thickness uniformity detection device according to claim 1, characterized in that: The rotary positioning mechanism includes a rotary drive unit and multiple rotary positioning components. Each rotary positioning component is rotatably equipped with a rotary positioning element. The rotary positioning element has a rotation axis extending along the first direction. The multiple rotary positioning components are arranged along an arc path. The arc path is coaxially arranged with the positioning axis on a plane perpendicular to the first direction. The rotary positioning element rolls against the outer surface of the glass bottle. The rotary drive unit is used to drive at least one of the rotary positioning elements to rotate.

6. The glass bottle wall thickness uniformity detection device according to claim 5, characterized in that: The first direction is inclined or perpendicular to the vertical direction, and at least two of the rotary positioning components are evenly arranged around the positioning axis on the lower side of the positioning axis. Furthermore, the rotary positioning components are radially adjustable along the arc path.

7. The glass bottle wall thickness uniformity detection device according to claim 5, characterized in that: The rotary positioning mechanism further includes a limiting plate, which is disposed on one or both sides of the axial direction of the positioning axis. The limiting plate and the plurality of rotary positioning components are offset from each other in the first direction.

8. The glass bottle wall thickness uniformity detection device according to claim 7, characterized in that: The two limiting plates are respectively disposed on both sides of the glass bottle along the positioning axis. Both limiting plates are rotatably disposed around the positioning axis, and at least one of the limiting plates is elastically adjustable.

9. A method for detecting the uniformity of glass bottle wall thickness, characterized in that: include: The detection light is controlled to enter the glass bottle to be tested at a preset angle, so that the detection light is refracted into the outer wall of the glass bottle, and then undergoes total internal reflection with the inner wall of the glass bottle before being emitted to the outside. The glass bottle is rotated around its own axis while the emission segment of the detection light emitted from the glass bottle is monitored. The change in the thickness of the glass bottle is monitored by the change in the emission segment.

10. The method for detecting the uniformity of glass bottle wall thickness according to claim 9, characterized in that: The preset angle is set according to the size and refractive index of the glass bottle.

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