Intelligent detection method and equipment for bubbles and impurities in glass beads

Abstract

The invention relates to the technical field of optical detection, and particularly discloses an intelligent detection method and equipment for bubbles and impurities in a glass bead, the equipment comprises a machine body and a detection cavity located in the machine body, and a detection unit used for detecting the glass bead to be detected is further arranged at the position of the middle axis of the detection cavity. The detection unit comprises a light irradiation assembly and a to-be-detected station, the to-be-detected station comprises a placing disc used for placing a to-be-detected glass bead in a suspension mode, the placing disc is further provided with a movement mechanism used for driving the to-be-detected glass bead to move, and the movement mechanism drives the to-be-detected glass bead to conduct two movement states at the same time; a light receiving assembly; the detection assembly is in signal connection with the light receiving assembly and is used for receiving the change electric signal output by the light receiving assembly, obtaining the electric signal variation and further generating a detection result based on the electric signal variation; and comprehensive detection of the to-be-detected glass bead is realized.

Description

Technical Field

[0001] The invention relates to the technical field of optical detection, and specifically discloses a method and equipment for intelligently detecting bubbles and impurities inside glass beads. Background Art

[0002] Glass beads are increasingly used in road engineering, especially in road markings, reflective signs and traffic safety facilities. Their optical properties directly affect the safety and visibility of nighttime driving. They enhance the visibility of road markings by reflecting vehicle lights, thereby providing drivers with clear road information. However, the size of glass beads is usually very small, with a diameter generally ranging from tens of microns to hundreds of microns. This tiny size causes the presence of bubbles and impurities inside the glass beads to have a significant impact on their optical properties. When there are bubbles or impurities inside the glass beads, light will be scattered or refracted abnormally on its surface and inside, resulting in reduced reflection efficiency, which in turn affects the reflective effect of road markings. This performance degradation may pose a serious threat to traffic safety at night or in bad weather conditions. Therefore, ensuring that there are no bubbles and impurities inside the glass beads is the key to ensuring their optical properties.

[0003] However, due to the extremely small size of glass beads, direct detection of them faces many difficulties. Existing detection methods mainly rely on microscopic observation or X-ray scanning, but these methods are not only costly but also inefficient and difficult to meet the needs of large-scale production. In addition, the production process of glass beads involves high-temperature melting and rapid cooling. The formation of bubbles and impurities inside is closely related to the quality of the glass raw material beads. Therefore, if the glass raw material beads can be strictly quality inspected before production, and unqualified products containing bubbles or impurities inside are eliminated, the quality of the glass beads can be improved from the source.

[0004] At present, when detecting internal defects of glass raw material beads, the industry usually adopts static optical inspection equipment. In actual inspection, the glass raw material beads in a fixed state are inspected through single-angle transmitted light, so only limited angle lighting information can be obtained. If bubbles and impurities are located on the non-detection path, they are easily missed, resulting in incomplete detection and insufficient detection accuracy, which makes it difficult to meet the needs of high-precision industrial inspection. Summary of the invention

[0005] The object of the present invention is to provide a method and device for intelligently detecting bubbles and impurities inside glass beads, so as to solve one of the above-mentioned technical problems existing in the prior art.

[0006] Specifically, the present invention is achieved through the following technical solutions:

[0007] An intelligent detection device for bubbles and impurities inside glass beads comprises a body and a detection cavity located inside the body, and a detection unit for detecting glass beads to be detected is also provided at the middle axis position of the detection cavity, and the detection unit comprises:

[0008] A light irradiation component, the light irradiation component includes a laser emitter, and the laser emitter emits a laser beam toward the glass bead to be tested;

[0009] The station to be tested includes a placement plate for suspending and placing the glass beads to be tested, and a motion mechanism for driving the glass beads to be tested to move is also provided on the placement plate, and the motion mechanism drives the glass beads to be tested to perform two motion states simultaneously;

[0010] A light receiving component, the light receiving component includes a photodetector, the photodetector is used to receive the laser beam signal passing through the glass bead to be tested, and convert it into a corresponding electrical signal for output. When there are bubbles and impurities inside the glass bead to be tested, the laser beam signal received by the photodetector fluctuates and outputs a changing electrical signal;

[0011] The detection component is signal-connected to the light receiving component, and is used to receive the changed electrical signal output by the light receiving component, obtain the amount of change of the electrical signal, and then generate a detection result based on the amount of change of the electrical signal.

[0012] Based on the above scheme, it realizes high-precision detection of internal defects of glass raw material beads. Specifically, when detecting the glass beads to be tested, the glass beads to be tested are suspended on a placement plate, and a motion mechanism is used to drive the glass beads to be tested to perform two movements at the same time, so that the laser beam emitted by the laser transmitter can pass through the glass beads from any angle, so that the equipment can perform a comprehensive detection of the interior of the glass beads to be tested. That is, when there are defects such as bubbles and impurities inside the glass beads to be tested, the defective parts can cut the light path multiple times in three-dimensional space, so that the laser beam signal received by the photoelectric detector of the light receiving component undergoes dynamic periodic fluctuations, so that the detection component can be used to accurately and timely detect and identify the bubble impurities in the glass beads to be tested, thereby improving the detection accuracy of the detection equipment and meeting the high-precision detection requirements.

[0013] In a further technical solution, the detection component includes a circuit comparison module, and the circuit comparison module includes an amplification circuit, a signal filtering circuit and an operational amplifier;

[0014] The input end of the amplifier circuit is electrically connected to the output end of each of the photodetectors, and is used to amplify the changing electrical signal;

[0015] The input end of the signal filtering circuit is connected to the output end of the amplifying circuit, and is used to perform denoising filtering on the amplified changing electrical signal and extract the variation of the electrical signal;

[0016] The input end of the operational amplifier is connected to the output end of the signal filtering circuit, and is used to compare the change amount of the electrical signal with a preset threshold value.

[0017] Based on the above scheme, the detection component realizes high-precision extraction and discrimination of weak laser beam signals through the cascade collaborative design of amplification circuit, signal filtering circuit and operational amplifier.

[0018] Further preferably, the circuit comparison module also includes a metal shielding shell installed on one side of the bottom of the placement plate, the amplification circuit and the signal filtering circuit are respectively integrated on two layers of circuit boards stacked on each other in the metal shielding shell, the two layers of circuit boards are bonded by alloy wires, and electromagnetic shielding materials are filled between the two layers of circuit boards, the operational amplifier is arranged inside the metal shielding shell and close to its grounding port, and the grounding port of the metal shielding shell is connected to the metal shell of the body through a wire and grounded.

[0019] In the above scheme, through the coordinated design of the metal shielding shell and the electromagnetic shielding material, effective isolation of external electromagnetic interference is achieved, while also providing a stable detection environment for the internal circuit, thereby improving the accuracy and reliability of detection.

[0020] Further preferably, a downwardly directed recessed portion is provided on the surface of the placement plate, the photoelectric detectors are evenly distributed in the recessed portion, and each of the photoelectric detectors is in contact with the surface of the recessed portion.

[0021] Based on the design of the above-mentioned recessed portion and the photoelectric detector, the photoelectric detector can comprehensively and effectively collect the laser beam signal, thereby enhancing the detection sensitivity and improving the detection efficiency.

[0022] More preferably, a plurality of micro-pores facing the bottom of the glass beads to be tested are provided in the recessed portion of the placement tray, and the gas inlet end of each of the micro-pores is connected to an air pump arranged in the placement tray, and the gas inlet end of the air pump extends to the outside of the machine body through a pipeline and is connected to an external air source.

[0023] Through the above arrangement, the air pump supplies air to the micro-pores and ejects air through them to form an air film layer in the recessed portion, thereby providing a certain air floating support force for the glass beads to be tested, so that they can be stably suspended at a certain height on the placement plate, thereby reducing the friction between the glass beads and the placement plate, ensuring the smooth movement of the glass beads driven by the motion mechanism, and then improving the stability of light irradiation and reception during the detection process, so as to optimize and improve the detection accuracy.

[0024] Furthermore, the motion mechanism includes a rotating component and a rolling component, the rotating component includes a first motor and a rotating ring, the first motor is arranged at the lower part of the placement plate, and is connected to the rotating ring through a transmission group at the output end, the rotating ring is coaxially sleeved on the outer peripheral surface of the placement plate, and the upper part of the rotating ring is in contact with the glass beads to be tested through the rolling component, and a stabilizing ring fixed to the inner wall of the machine body is also coaxially sleeved on the outer peripheral surface of the rotating ring, and the rotating ring is rotatably connected to the stabilizing ring and the placement plate through precision bearings.

[0025] Through the above structural design, the rotating part and rolling part of the motion mechanism are used to realize that the glass beads to be tested have two motion states during detection, namely rotational motion and rolling motion. In the above technical scheme, the structure of the rotating part is further disclosed to realize high-precision and stable rotation drive of the glass beads to be tested.

[0026] More specifically, the transmission group includes a driving gear installed on the output shaft of the first motor, the upper part of the driving gear is connected to the bottom of the placement plate through a support rod rotatably connected to the driving gear, and a plurality of transmission gears meshing with the driving gear are installed around the driving gear, each of the transmission gears is connected to the body through a gear rod rotatably matched at the bottom, a gear ring meshing with the driving gear is sleeved around the transmission gear, and the upper part of the gear is connected to the bottom of the rotating ring.

[0027] Based on the specific structure of the transmission assembly disclosed in the above solution, it is possible to transmit the rotational torque of the first motor to the rotating ring to achieve stable rotation of the rotating ring.

[0028] As a further specific example, the rolling components are symmetrically arranged on both sides of the top of the rotating ring, and each of the rolling components includes a rolling roller that rolls in contact with the glass bead to be tested, the rolling roller is adapted to the outer surface of the glass bead to be tested, and rolling brackets are provided at both ends of the rolling roller. A second motor for driving the corresponding rolling roller to rotate is also installed on the outer side of one of the rolling brackets.

[0029] Based on the specific structure of the rolling component disclosed in the above scheme, it is realized that while the rotating component drives the glass bead to be tested to rotate around the axis of the detection cavity in the horizontal plane, it can also drive the glass bead to be tested to roll around its bead center in the vertical plane.

[0030] A method for intelligently detecting bubbles and impurities inside glass beads, according to a device for intelligently detecting bubbles and impurities inside glass beads in the above technical solution, specifically, the method comprises the following steps:

[0031] Step 1, the glass beads to be tested are sent to the placement plate in the detection chamber, and the air pump is used to supply air to the micro-pores to make the glass beads to be tested suspended and placed on the placement plate of the test station;

[0032] Step 2: Control the motion mechanism to make the glass bead to be tested move.

[0033] The movement process of the glass bead to be tested includes a first movement state and a second movement state that are performed simultaneously. The first movement state is that the glass bead to be tested rotates around the axis of the machine body on a horizontal plane, and the second movement state is that the glass bead to be tested rolls around the center of the glass bead to be tested on a vertical plane.

[0034] Step 3, synchronously start the light irradiation component and the light receiving component, so that the light irradiation component emits a laser beam to the glass beads to be tested in two motion states, and the laser beam signal passing through the glass beads to be tested is received by the light receiving component and converted into an electrical signal for output.

[0035] When there are bubbles and impurities inside the glass bead to be tested, the laser beam signal received by the photodetector will fluctuate, causing the electrical signal converted and output by the photodetector to change, thereby forming an electrical signal change and outputting it;

[0036] Step 4: The detection component amplifies, filters and compares the threshold of the electrical signal change to generate bubble and impurity detection results, and the glass that has completed the detection is discharged and sorted.

[0037] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0038] 1. The present invention realizes high-precision detection of internal defects of glass raw material beads. When detecting the glass beads to be detected, the glass beads to be detected are suspended on a placement plate, and a motion mechanism is used to drive the glass beads to be detected to perform two movements at the same time, so that the laser beam emitted by the laser transmitter can pass through the glass beads from any angle, so that the equipment can perform comprehensive detection of the glass beads to be detected. When there are defects such as air bubbles and impurities inside the glass beads to be detected, the defective parts can cut the light path multiple times in three-dimensional space, so that the laser beam signal received by the photoelectric detector of the light receiving component undergoes dynamic periodic fluctuations, so that the detection component can accurately and timely detect and identify the air bubbles and impurities in the glass beads to be detected, meeting the high-precision detection requirements;

[0039] 2. The present invention uses an air pump and micro-pores to suspend the glass beads on the placement plate, reducing friction interference. At the same time, the symmetrical distribution and curvature adaptation of the rolling roller are used to form symmetrical point contact positioning for the glass beads to be tested, solving the problem of glass bead shaking or jumping caused by traditional gas suspension. Specifically, the airflow ejected from the micro-pores forms an air film layer to provide air floating support force to keep the glass beads suspended stably, while the limiting effect of the rolling roller inhibits the radial displacement of the glass beads, ensuring the stability of the glass beads during movement and avoiding detection errors caused by shaking or jumping, thereby further optimizing and improving the stability and accuracy of the detection;

[0040] 3. The present invention further solves the problem of interference of industrial environment on detection accuracy by integrating air flotation purification and dynamic detection. Specifically, the air pump is connected to an external clean air source (such as nitrogen) and sprays it through micro-pores to form a laminar barrier to remove dust in the recessed part and adsorbed substances (such as dust particles) on the surface of the glass beads to be tested, thereby avoiding their influence on the detection work and further improving the detection accuracy of the detection equipment;

[0041] 4. The present invention solves the problems of dispersed signal processing and poor anti-interference ability of traditional detection equipment through the coordinated design of the amplification circuit, signal filtering circuit and operational amplifier of the detection component. Specifically, the amplification circuit amplifies the change of the weak electrical signal output by the photodetector, and the signal filtering circuit denoises and filters the amplified electrical signal based on the passive LC filter and the active filter. The operational amplifier compares the denoised electrical signal with the preset threshold to generate an accurate detection result. At the same time, the use of metal shielding shells and electromagnetic shielding materials further enhances the anti-interference ability, ensures the stability and accuracy of signal processing, and thus significantly improves the reliability and efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0043] Figure 1 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0044] Figure 2 is a schematic diagram of the internal structure of the circuit comparison module of the present invention;

[0045] Figure 3 For the present invention Figure 1 Schematic diagram of the internal top view structure;

[0046] Figure 4 It is a schematic diagram of the top view of the placement tray of the present invention;

[0047] Figure 5 It is a schematic diagram of the transmission group structure of the present invention;

[0048] Figure 6 It is a schematic diagram of the overall side view structure of the present invention, which is intended to show the narrow-band filter;

[0049] Figure 7 For the present invention Figure 6 A schematic diagram of the internal top view structure is intended to show the positioning block;

[0050] Figure 8 This is a schematic diagram of the method steps of Example 2 of the present invention.

[0051] The reference numerals represent: 1. body; 2. laser emitter; 3. placement plate; 31. recessed portion; 32. micropores; 4. photodetector; 5. circuit comparison module; 51. metal shielding shell; 52. circuit board; 53. operational amplifier; 6. air pump; 61. pipeline; 711. first motor; 7121. driving gear; 7122. transmission gear; 7123. gear ring; 713. rotating ring; 714. stabilizing ring; 721. rolling roller; 722. rolling bracket; 723. second motor; 8. narrow-band filter; 9. positioning block. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0053] Embodiment 1;

[0054] See also Figures 1 to 7 As shown, this embodiment discloses an intelligent detection device for bubbles and impurities inside glass beads, including a body 1 and a detection cavity located inside the body 1, and a detection unit for detecting the glass beads to be detected is also provided at the middle axis position of the detection cavity, and the detection unit includes:

[0055] A light irradiation component, the light irradiation component includes a laser emitter 2, and the laser beam emitted by the laser emitter 2 is directed to the glass bead to be tested;

[0056] The station to be tested includes a placement plate 3 for suspending the glass beads to be tested, and a motion mechanism for driving the glass beads to be tested to move is also provided on the placement plate 3. The motion mechanism drives the glass beads to be tested to perform two motion states at the same time. It should be understood that the motion process of the glass beads to be tested during the detection includes a first motion state and a second motion state that are performed simultaneously. The first motion state is to rotate around the axis of the machine body 1 on a horizontal plane, and the second motion state is to roll around the center of the glass beads to be tested on a vertical plane.

[0057] A light receiving component, the light receiving component includes a photodetector 4, the photodetector 4 is used to receive the laser beam signal passing through the glass bead to be tested, and convert it into a corresponding electrical signal for output. When there are bubbles and impurities inside the glass bead to be tested, the laser beam signal received by the photodetector 4 fluctuates and outputs a changing electrical signal;

[0058] The detection component is signal-connected to the light receiving component, and is used to receive the change in the electrical signal output by the light receiving component, and generate a detection result based on the change in the electrical signal.

[0059] It should be noted that, through the above-mentioned embodiment, high-precision detection of internal defects of glass raw material beads is achieved. More specifically, when detecting the glass beads to be tested, the glass beads to be tested are suspended on the placement plate 3, and the motion mechanism is used to drive the glass beads to be tested to perform two movements at the same time, so that the laser beam emitted by the laser emitter 2 can pass through the glass beads from any angle, so that the equipment can perform a comprehensive detection of the interior of the glass beads to be tested. That is, when there are defects such as bubbles and impurities inside the glass beads to be tested, the defective parts can cut the light path multiple times in three-dimensional space, so that the laser beam signal received by the photodetector 4 of the light receiving component undergoes dynamic periodic fluctuations, so that the detection component can be used to accurately and timely detect and identify the bubble impurities in the glass beads to be tested, thereby improving the detection accuracy of the detection equipment and meeting the high-precision detection requirements.

[0060] As a preference, Figure 6 As shown in the figure, a narrowband filter 8 is also provided at the emission front end of the photodetector 4, and the narrowband filter 8 is connected to the top of the detection cavity through a connecting frame. The narrowband filter 8 itself is a common technical component in the optical field, and the present scheme does not elaborate on its principle. It is only supplemented here that, in the specific implementation, the applicable wavelength (center wavelength) of the narrowband filter 8 used should match the wavelength of the laser beam emitted by the laser emitter 2 in the present scheme (for example, if the output wavelength of the laser emitter 2 is 635nm, the center wavelength of the narrowband filter 8 should also be selected at 635nm, which is only an example here), thereby effectively ensuring the effective suppression of stray light and interference light; that is to say, the main function of using the narrowband filter 8 is to block and suppress the stray light and interference light in the detection cavity, thereby ensuring that the photodetector 4 can only receive the laser beam signal of a specific wavelength emitted by the laser emitter 2, so as to improve the accuracy of the signal received by the photodetector 4.

[0061] In a further embodiment, the detection component includes a circuit comparison module 5, and the circuit comparison module 5 includes an amplification circuit, a signal filtering circuit and an operational amplifier 53;

[0062] The input end of the amplifier circuit is electrically connected to the output end of each of the photodetectors 4, and is used to amplify the changing electrical signal;

[0063] The input end of the signal filtering circuit is connected to the output end of the amplifying circuit, and is used to perform denoising filtering on the amplified changing electrical signal and extract the variation of the electrical signal;

[0064] The input end of the operational amplifier 53 is connected to the output end of the signal filtering circuit, and is used to compare the change in the electrical signal with a preset threshold.

[0065] In specific implementation, the detection component realizes high-precision extraction and discrimination of weak laser beam signals through the cascaded collaborative design of the amplification circuit, the signal filtering circuit and the operational amplifier 53. Specifically:

[0066] The change in the weak electrical signal output by the photodetector 4 is amplified by the amplifier circuit. The laser beam signal received by the photodetector 4 will fluctuate when encountering bubbles and impurities inside the glass beads, thereby causing the output. However, when the laser beam signal fluctuates, its fluctuation may be relatively small, resulting in a relatively weak output electrical signal. If these weak electrical signals are directly processed, the detection accuracy may be affected by noise interference.

[0067] Therefore, illustratively, in a specific implementation, by introducing a differential input structure in the amplifier circuit to connect the output end of the photodetector 4, the weak changing electrical signal is preliminarily amplified by the instrument amplifier, and a dynamic gain adjustment function is integrated, and the output amplitude is monitored in real time by the automatic gain control circuit, and then the gain range is dynamically adjusted to ensure that it is always stable in the linear working range, and the amplified changing signal is then input into the signal filtering circuit, which adopts a cascade design of a passive LC filter and an active low-pass filter, firstly coarsely filters the high-frequency noise through the passive LC filter, and then finely filters the residual interference through the active low-pass filter and extracts the effective electrical signal change, thereby significantly suppressing the noise interference, and finally the electrical signal change after filtering and extraction will be transmitted to the hysteresis comparator module composed of the operational amplifier 53, the detection threshold is set by the reference voltage source, and the hysteresis voltage is introduced to prevent the signal from jittering, so as to output the judgment result when the signal exceeds the threshold; based on the above implementation mode, the detection component can extract and distinguish the tiny laser beam signal fluctuations caused by bubbles and impurities with high precision, thereby meeting the high-precision detection requirements of the equipment for the glass beads to be tested under complex working conditions.

[0068] As a further preferred implementation mode, the output end of the operational amplifier 53 is also signal-connected to a detection indication unit (not shown in the figure) outside the body 1, so that when the operational amplifier 53 compares the change in the electrical signal after denoising and filtering with a preset threshold value, and obtains a comparison result that the change in the electrical signal is greater than the preset threshold value, it is determined that bubbles and impurities exist inside the glass beads to be tested, and the detection result is output to trigger the detection indication unit to generate an indication signal. The detection indication unit can be an industrial control display panel or an audible and visual alarm device. When the detection indication unit receives the detection result of the operational amplifier 53, it can be displayed accordingly or prompted through an audible and visual alarm.

[0069] It should be further added that the preset threshold is the critical signal amplitude for distinguishing glass beads that meet the standards from glass beads that do not meet the standards due to the presence of bubbles and impurities. Therefore, it is comprehensively designed through experimental calibration and industrial standards to ensure the accuracy and feasibility of the test results. For example, the threshold can be set to the signal amplitude corresponding to the minimum allowable defect size based on relevant standards in the application field of glass beads (for example, road markings must comply with GB / T 24722-2009).

[0070] In some preferred embodiments, Figure 2 As shown, the circuit comparison module 5 also includes a metal shielding shell 51 installed on one side of the bottom of the placement plate 3, and the amplification circuit and the signal filtering circuit are respectively integrated on two layers of circuit boards 52 stacked on each other in the metal shielding shell 51. The two layers of circuit boards 52 are bonded by alloy wires, and electromagnetic shielding materials are filled between the two layers of circuit boards 52. The operational amplifier 53 is arranged inside the metal shielding shell 51 and close to its grounding port. The grounding port of the metal shielding shell 51 is connected to the metal shell of the body 1 through a wire and is grounded.

[0071] In the above scheme, through the coordinated design of the metal shielding shell 51 and the electromagnetic shielding material, effective isolation of external electromagnetic interference is achieved, and a stable detection environment is provided for the internal circuit, thereby improving the accuracy and reliability of detection; further, the installation of the metal shielding shell 51 is based on the principle of electromagnetic shielding, and its metal shielding body can shield the far-field of the radiation interference source by reflecting and absorbing electromagnetic waves, that is, it can simultaneously shield the electric field and magnetic field components generated by the field source, and the grounded closed metal shell is also a good electrostatic shielding device, which can prevent the external electrostatic field from entering. In addition, the electromagnetic shielding material filled between the two layers of circuit boards 52 enhances the shielding effect. This material can further absorb and reflect electromagnetic waves, reduce mutual interference between internal circuits, and ensure the accuracy of signal processing. As a preferred embodiment, the corresponding electromagnetic shielding material can be further sprayed on the inside of the electromagnetic shielding shell.

[0072] In a further preferred embodiment, Figure 4 As shown in the figure, the surface of the placing plate 3 is provided with a downward recessed portion 31 , the photoelectric detectors 4 are evenly distributed in the recessed portion 31 , and each of the photoelectric detectors 4 is in contact with the surface of the recessed portion 31 .

[0073] Based on the design of the above-mentioned recessed portion 31 and the photodetector 4, the photodetector 4 can fully and effectively collect the laser beam signal, thereby enhancing the detection sensitivity and improving the detection efficiency. Specifically, the shape of the recessed portion 31 is flat in the middle and has arc transitions on all sides. Therefore, for the photodetectors 4 evenly distributed in the recessed portion 31, the photodetectors 4 located in the flat middle portion are mainly used to receive the directly transmitted light beam, while the photodetectors 4 located in the arc transition portions on all sides are used to receive the scattered light beam.

[0074] For example, when the laser passes through the glass bead to be tested, bubbles or impurities will cause multi-path scattering and refraction of light. If the photodetector 4 adopts a traditional bow array planar layout, it can only receive the main light beam signal because it is perpendicular to its optical path, and the scattered light beam signal is easily ignored. Therefore, this solution uses the recessed portion 31 to design a semi-wrapped distribution of the photodetector 4 array, and its surface matches the curvature of the bottom of the glass bead, which can capture the main light beam and the scattered light beam at the same time, thereby optimizing the collection effect of the laser beam signal and making its detection more comprehensive.

[0075] In this embodiment, the photodetectors 4 may be avalanche diodes, and are arranged in an array on a flexible substrate so as to be arranged in contact with the surface of the recessed portion 31 .

[0076] As a more preferred embodiment, further reference is made to Figure 1 , Figure 4 and Figure 6 As shown, a plurality of micro-pores 32 facing the bottom of the glass beads to be tested are also provided in the recessed portion 31 of the placement tray 3, and the gas inlet end of each of the micro-pores 32 is connected to the air pump 6 arranged in the placement tray 3, and the gas inlet end of the air pump 6 extends to the outside of the body 1 through the pipeline 61 and is connected to the external air source.

[0077] During specific implementation, the air pump 6 supplies air to the micro-pores 32, and through the air flow ejected therefrom, an air film layer can be formed in the recessed portion 31, thereby providing a certain air floating support force for the glass beads to be tested, so that they can be stably suspended at a certain height on the placement plate 3, thereby reducing the friction between the glass beads and the placement plate 3, ensuring the smooth movement of the glass beads driven by the motion mechanism, and then improving the stability of light irradiation and reception during the detection process, so as to optimize and improve the detection accuracy. Furthermore, the air pump 6 is connected to an external clean air source (such as a nitrogen storage tank) through a pipeline 61, and continuously supplies air to the micro-pores 32 to form a laminar barrier in the recessed portion 31, so as to remove the dust in the recessed portion 31 and prevent it from adhering to the surface of the photodetector 4 and causing a decrease in sensitivity. At the same time, when the glass beads to be tested move, the clean air flow can also remove the dust particles attached to the surface of the glass beads to ensure the cleanliness of the surface of the glass beads to be tested during the detection process, thereby improving the accuracy of the detection.

[0078] As a further example, Figure 1 and Figure 6 As shown, the motion mechanism includes a rotating component and a rolling component, and the rotating component includes a first motor 711 and a rotating ring 713. The first motor 711 is arranged at the lower part of the placement plate 3 and is connected to the rotating ring 713 through a transmission group at the output end. The rotating ring 713 is coaxially sleeved on the outer peripheral surface of the placement plate 3, and the upper part of the rotating ring 713 contacts the glass beads to be tested through a rolling component. A stabilizing ring 714 fixed to the inner wall of the body 1 is also coaxially sleeved on the outer peripheral surface of the rotating ring 713. The rotating ring 713, the stabilizing ring 714 and the placement plate 3 are all rotatably connected through precision bearings.

[0079] Based on the above embodiment, the rotating part and rolling part of the motion mechanism are used to realize that the glass beads to be tested have two motion states during detection, namely rotational motion and rolling motion. In the above technical scheme, the structure of the rotating part is further disclosed to realize high-precision and stable rotation drive of the glass beads to be tested.

[0080] Exemplarily, the first motor 711 is used as a power source and is arranged at the lower part of the placement plate 3. Its output end is connected to the rotating ring 713 through a transmission group. When the motor is started, the rotational torque is transmitted to the rotating ring 713 through the transmission group to rotate the rotating ring 713, and then the rotating ring 713 rotates to drive the rolling part to rotate, thereby driving the glass bead to be tested to perform a first motion state - that is, to rotate around the axis of the detection chamber in a horizontal plane. Since the rotating ring 713 is rotationally connected to the stabilizing ring 714 and the placement plate 3 through precision bearings, the stability of the rotating ring 713 during rotation is ensured through the coordinated use of the stabilizing ring 714 and the precision bearings, thereby reducing the detection error caused by vibration and shaking.

[0081] In a more specific embodiment, Figure 5 As shown, the transmission group includes a driving gear 7121 installed on the output shaft of the first motor 711, the upper part of the driving gear 7121 is connected to the bottom of the placement plate 3 through a support rod rotatably connected thereto, and a plurality of transmission gears 7122 meshing therewith are installed around the driving gear 7121, each of the transmission gears 7122 is connected to the body 1 through a gear rod rotatably matched at the bottom, and a gear ring 7123 meshing therewith is sleeved around the transmission gear 7122, and the upper part of the gear is connected to the bottom of the rotating ring 713.

[0082] Based on the specific structure of the transmission assembly disclosed in the above embodiment, it realizes the transmission of the rotation torque of the first motor 711 to the rotating ring 713 to realize the stable rotation of the rotating ring 713, that is, after the first motor 711 works, it drives the driving gear 7121 to rotate, so that the driving gear 7121 rotates and drives the transmission gears 7122 around it to rotate (rotate) with the gear rod as the rotation axis, and then the transmission gear 7122 rotates and drives the ring gear 7123 to rotate, so the driving gear 7121-transmission gear 7122-ring gear 7123 substantially constitutes a planetary gear set mechanism;

[0083] It should be understood that the transmission group in this embodiment adopts a three-stage meshing structure of driving gear 7121-transmission gear 7122-ring gear 7123, which not only simply realizes power transmission, but most importantly, it also realizes high-stability precision rotation of the glass beads to be tested through the precise coordination of its multi-stage reduction and torque diversion.

[0084] Exemplarily, the first motor 711 drives the driving gear 7121 to rotate, and the transmission gears 7122 around it are connected to the body 1 through a gear rod to form a planetary gear system, which evenly distributes the input torque to multiple meshing points, and outputs it to the rotating ring 713 through the ring gear 7123, so that the rotating ring 713 and the ring gear 7123 obtain stable power input, and at the same time, the three-stage meshing of the driving gear 7121-transmission gear 7122-ring gear 7123 of the planetary gear set mechanism is used for speed reduction transmission, so that the high-speed power output of the first motor 711 is converted into a low-speed input to the rotating ring 713 (that is, the high speed and low torque of the motor are converted into the low speed and high torque of the rotating ring 713), thereby significantly suppressing the vibration of the rotating ring 713 and further increasing its stability during rotation to meet the requirements of precision detection.

[0085] For further details, please refer to Figure 3 and Figure 7 As shown, the rolling components are symmetrically arranged on both sides of the top of the rotating ring 713, and each of the rolling components includes a rolling roller 721 that is in rolling contact with the glass bead to be tested, and the rolling roller 721 is adapted to the outer surface of the glass bead to be tested, and rolling brackets 722 are provided at both ends of the rolling roller 721. A second motor 723 for driving the corresponding rolling roller 721 to rotate is also installed on the outer side of one of the rolling brackets 722.

[0086] Based on the specific structure of the rolling component, it is achieved that while the rotating component drives the glass bead to be tested to rotate around the axis of the detection cavity in the horizontal plane, it can also drive the glass bead to be tested to roll around its bead center in the vertical plane.

[0087] Specifically, when the rotating ring 713 rotates, the rolling components on both sides of the top thereof are driven to rotate, and the rolling rollers 721 of the rolling components are arranged on both sides of the top of the rotating ring 713 and are adapted to the outer surface of the glass bead to be tested (such as Figure 3 As shown in the figure, the rotation of the rolling component can synchronously drive the glass beads to be tested to rotate. At the same time, the second motor 723 on the outer side of the rolling bracket 722 is started, so that the second motor 723 drives the corresponding rolling roller 721 to rotate. After the rolling roller 721 rotates, the glass beads to be tested can be driven to roll through the friction force outside thereof, thereby realizing that the glass beads to be tested have two motion states.

[0088] In specific implementation, as a preferred embodiment, Figure 7 As shown in the figure, positioning blocks 9 are further provided at the front and rear ends of the recessed portion 31 on the placing plate 3, and an arc portion matching the surface curvature of the glass bead to be tested is provided on the side of the top block facing the glass bead to be tested, and a brush is provided inside the arc portion. Since the positioning block 9 is not in direct contact with the glass bead to be tested, and is only in contact with the glass bead to be tested through the brush, when the glass bead to be tested rotates and rolls, slight contamination on the surface of the glass bead to be tested can be cleaned by the brush.

[0089] At the same time, it should be further explained that in the above embodiment, the rolling roller 721 is not only provided to drive the glass bead to be tested to roll, but also can limit the glass bead to be tested, that is, through the symmetrical distribution of the rolling roller 721 and the adaptation of the curvature of the outer surface of the glass bead to be tested, and based on the two positioning blocks 9 on the placement plate 3, a symmetrical four-point contact positioning (such as Figure 7 As shown in the figure, the radial displacement of the glass beads to be tested can be effectively suppressed during their movement. That is, the glass beads to be tested can be prevented from shaking and becoming unstable due to external disturbances or defects in their outer surface shape (such as insufficient roundness resulting in a non-standard spherical shape) when they are placed in gas suspension during the detection process. This can cause the laser beam to be unable to stably pass through the glass beads to be tested, making it difficult to effectively detect the internal bubbles and impurities in the glass beads to be tested.

[0090] In addition, it should be noted that both the first motor 711 and the second motor 723 are high-precision servo motors, and the contact surface between the rolling roller 721 and the glass bead to be tested is made of silicone. The glass bead to be tested is driven to rotate and roll through the high-precision speed control of the servo motor and the friction force when the silicone contacts the surface of the glass bead to be tested.

[0091] Embodiment 2;

[0092] See also Figure 8As shown, this embodiment is based on the intelligent detection device for bubbles and impurities inside glass beads proposed in Example 1, and hereby proposes an intelligent detection method for bubbles and impurities inside glass beads. Specifically, the method includes the following steps:

[0093] Step 1, the glass beads to be tested are sent to the placement plate 3 in the detection chamber, and the air pump 6 is used to supply air to the micro-pores 32 to make the glass beads to be tested suspended and placed on the placement plate 3 at the testing station;

[0094] Step 2: Control the motion mechanism to make the glass bead to be tested move.

[0095] The movement process of the glass bead to be tested includes a first movement state and a second movement state that are performed simultaneously. The first movement state is that the glass bead to be tested rotates around the axis of the machine body 1 on a horizontal plane, and the second movement state is that the glass bead to be tested rolls around the center of the glass bead to be tested on a vertical plane.

[0096] Step 3, synchronously start the light irradiation component and the light receiving component, so that the light irradiation component emits a laser beam to the glass beads to be tested in two motion states, and the laser beam signal passing through the glass beads to be tested is received by the light receiving component and converted into an electrical signal for output.

[0097] When there are bubbles and impurities inside the glass bead to be tested, the laser beam signal received by the photodetector 4 will fluctuate, causing the electrical signal converted and output by the photodetector 4 to change, thereby forming an electrical signal variation and outputting it;

[0098] Step 4: The detection component amplifies, filters and compares the threshold of the electrical signal change to generate bubble and impurity detection results, and the glass that has completed the detection is discharged and sorted.

[0099] Based on the above implementation, efficient and accurate detection of internal defects of glass beads is achieved through innovative equipment structure and multi-dimensional motion control; first, the glass beads are suspended by using the air pump 6 and micro-pores 32, which reduces friction interference and provides a stable foundation for subsequent multi-dimensional motion. Then, through the synergistic effect of the motion mechanism, the glass beads are simultaneously subjected to two motion states: horizontal rotation and vertical rolling, ensuring that the laser beam can pass through the glass beads from multiple angles to fully detect internal bubbles and impurities. When the laser beam emitted by the light irradiation component encounters internal defects, it will cause fluctuations in the laser beam signal. The photodetector 4 converts this fluctuation into a change in the electrical signal, and generates accurate detection results after amplification, filtering and threshold comparison by the detection component. The entire method not only improves the comprehensiveness and accuracy of the detection, but also ensures the stability of the glass bead movement through the suspension and limit design, avoiding detection errors caused by shaking or jumping.

[0100] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0101] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are schematic diagrams, which are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the present invention.

Claims

1. An intelligent detection device for bubbles and impurities inside glass beads, comprising a body (1) and a detection chamber located inside the body (1), wherein a detection unit for detecting the glass beads to be detected is provided at the middle axis position of the detection chamber, wherein: The detection unit comprises: A light irradiation component, the light irradiation component comprising a laser emitter (2), the laser emitter (2) emitting a laser beam directed towards the glass bead to be tested; A station to be tested, the station to be tested comprising a placement plate (3) for suspending and placing the glass beads to be tested, a motion mechanism for driving the glass beads to be tested to move being provided on the placement plate (3), the motion mechanism driving the glass beads to be tested to perform two motion states simultaneously; A light receiving component, the light receiving component comprising a photodetector (4), the photodetector (4) being used to receive a laser beam signal passing through the glass bead to be tested and convert it into a corresponding electrical signal for output; when bubbles and impurities exist inside the glass bead to be tested, the laser beam signal received by the photodetector (4) fluctuates and outputs a changing electrical signal; The detection component is signal-connected to the light receiving component, and is used to receive the changed electrical signal output by the light receiving component, obtain the amount of change of the electrical signal, and then generate a detection result based on the amount of change of the electrical signal.

2. The intelligent detection device for bubbles and impurities inside glass beads according to claim 1, characterized in that: The detection component comprises a circuit comparison module (5), and the circuit comparison module (5) comprises an amplification circuit, a signal filtering circuit and an operational amplifier (53); The amplifier circuit comprises an input end electrically connected to an output end of each of the photodetectors (4) for amplifying the changing electrical signal; The input end of the signal filtering circuit is connected to the output end of the amplifying circuit, and is used to perform denoising filtering on the amplified changing electrical signal and extract the variation of the electrical signal; The input end of the operational amplifier (53) is connected to the output end of the signal filtering circuit, and is used to compare the amount of change of the electrical signal with a preset threshold value.

3. The intelligent detection device for bubbles and impurities inside glass beads according to claim 1, characterized in that: The surface of the placement plate (3) is provided with a downwardly directed recessed portion (31), the photoelectric detectors (4) are evenly distributed in the recessed portion (31), and each of the photoelectric detectors (4) is in contact with the surface of the recessed portion (31).

4. The intelligent detection device for bubbles and impurities inside glass beads according to claim 3 is characterized in that: A plurality of micro-pores (32) facing the bottom of the glass beads to be tested are also provided in the recessed portion (31) of the placement plate (3); the gas inlet end of each of the micro-pores (32) is connected to an air pump (6) disposed in the placement plate (3); and the gas inlet end of the air pump (6) extends to the outside of the machine body (1) through a pipeline (61) and is connected to an external air source.

5. The intelligent detection device for bubbles and impurities inside glass beads according to claim 1, characterized in that: The motion mechanism comprises a rotating component and a rolling component, wherein the rotating component comprises a first motor (711) and a rotating ring (713), wherein the first motor (711) is arranged at the lower part of the placement plate (3) and is connected to the rotating ring (713) via a transmission group at an output end, wherein the rotating ring (713) is coaxially sleeved on the outer peripheral surface of the placement plate (3), and the upper part of the rotating ring (713) contacts the glass beads to be tested via the rolling component, and a stabilizing ring (714) fixedly connected to the inner wall of the machine body (1) is coaxially sleeved on the outer peripheral surface of the rotating ring (713), wherein the rotating ring (713), the stabilizing ring (714) and the placement plate (3) are all rotatably connected via precision bearings.

6. The intelligent detection device for bubbles and impurities inside glass beads according to claim 5, characterized in that: The transmission group comprises a driving gear (7121) mounted on the output shaft of the first motor (711); the upper portion of the driving gear (7121) is connected to the bottom of the placement plate (3) via a support rod rotatably connected thereto; a plurality of transmission gears (7122) meshing therewith are mounted around the driving gear (7121); each transmission gear (7122) is connected to the machine body (1) via a gear rod rotatably engaged at the bottom; a gear ring (7123) meshing therewith is sleeved around the transmission gear (7122); and the upper portion of the gear is connected to the bottom of the rotating ring (713).

7. The intelligent detection device for bubbles and impurities inside glass beads according to claim 6, characterized in that: The rolling components are symmetrically arranged on both sides of the top of the rotating ring (713), and each of the rolling components comprises a rolling roller (721) in rolling contact with the glass bead to be tested, the rolling roller (721) is adapted to the outer surface of the glass bead to be tested, and rolling brackets (722) are arranged at both ends of the rolling roller (721), and a second motor (723) for driving the corresponding rolling roller (721) to rotate is also installed on the outer side of one of the rolling brackets (722).

8. An intelligent detection method for bubbles and impurities inside glass beads, characterized in that: According to the intelligent detection device for bubbles and impurities inside glass beads according to any one of claims 1 to 7, the method comprises the following steps: Step 1, delivering the glass beads to be tested to the placement plate (3) in the detection chamber, and supplying air to the micro-pores (32) through the air pump (6) to spray air, so that the glass beads to be tested are suspended and placed on the placement plate (3) at the testing station; Step 2, controlling the motion mechanism to operate, causing the glass bead to be tested to perform two motion states simultaneously; Step 3, synchronously start the light irradiation component and the light receiving component, so that the light irradiation component emits a laser beam to the glass beads to be tested in two motion states, and the laser beam signal passing through the glass beads to be tested is received by the light receiving component and converted into an electrical signal for output. When bubbles and impurities exist inside the glass bead to be tested, the laser beam signal received by the photoelectric detector (4) will fluctuate, causing the electrical signal converted and output by the photoelectric detector (4) to change, thereby forming an electrical signal variation and outputting it; Step 4: Amplify, filter and compare the threshold of the electrical signal change through the detection component to generate bubble and impurity detection results, and discharge and sort the glass after the detection.

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