A road marking glass bead optical performance detection device

Abstract

The present invention relates to a road marking glass bead optical performance detection device, belonging to the technical field of optical detection devices, comprising: a detection tube, an air suspension tube, a laser emitter and a laser sensor; the detection tube forms a semi-enclosed space for reducing the influence of the external environment on the detection; the air suspension tube is vertically plugged into the bottom of the detection tube, and the air suspension tube introduces compressed air into the detection tube; the laser emitter is connected to the inner side of the detection tube, and the laser emitter emits laser light to the glass beads suspended on the air suspension tube; the laser sensor is connected to the inner side of the detection tube, and is arranged corresponding to the laser emitter, and is used to receive the laser light refracted by the suspended glass beads and the laser light directly irradiated by the laser emitter to the laser emitter. It can solve the technical problem in the prior art that contact clamping will reduce the accuracy of the detection result when performing optical detection on glass.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical detection devices, and in particular relates to a device for detecting the optical properties of road marking glass beads. Background Art

[0002] The optical performance of road marking glass beads mainly requires a high refractive index. However, the glass beads used in road markings are micro-beads, with sizes generally ranging from tens of microns to several millimeters. Manual clamping, positioning and detection are very difficult.

[0003] Patent application number 202410830005.0 discloses an intelligent laminated glass detection device and method, belonging to the technical field of glass detection equipment. The device comprises a housing and a detection box disposed within the housing; a lifting assembly disposed within the housing that is driven to move the laminated glass to be inspected within the housing; and a sealing plate that slides at the bottom of the housing and is disposed at the top of the channel. When the lifting arm drives the laminated glass upward, the sealing plate slides to close the housing, forming a dark chamber.

[0004] The existing technology has the following problems:

[0005] Automated loading is used to perform optical inspection on glass. However, the microbeads are difficult to clamp and contact clamping can contaminate the surface of the microbeads, interfering with the optical inspection results and reducing the accuracy of the inspection results. Summary of the Invention

[0006] The present invention provides a device for detecting the optical properties of road marking glass beads, which can solve the technical problem in the prior art that contact clamping reduces the accuracy of the detection result when performing optical detection on glass.

[0007] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0008] The present application provides a device for testing the optical properties of road marking glass beads, which includes a detection tube, an air suspension tube, a laser emitter, and a laser sensor. The detection tube forms a semi-enclosed space for reducing the influence of the external environment on the detection. The air suspension tube is vertically inserted into the bottom of the detection tube, and the air suspension tube introduces compressed air into the detection tube. The compressed air causes glass beads with qualified roundness to be suspended above the opening at one end of the air suspension tube inserted into the detection tube, and the compressed air causes glass beads with unqualified roundness to deviate from the opening at one end of the air suspension tube inserted into the detection tube. The laser emitter is connected to the inner side of the detection tube, and the laser emitter emits laser light towards the glass beads suspended on the air suspension tube. The laser sensor is connected to the inner side of the detection tube and is arranged corresponding to the laser emitter. It is used to receive laser light refracted by the suspended glass beads and laser light directly irradiated by the laser emitter toward the laser emitter.

[0009] Through the above technical solution, air suspension is used to support the glass beads, avoiding contamination of the glass bead surface by contact clamping. At the same time, the air suspension support method is used to screen the roundness of the glass beads. The laser detection of refractive index will only detect glass beads with qualified roundness, avoiding the influence of refractive index detection due to unqualified roundness of glass beads, thereby improving the accuracy of detection.

[0010] In the present invention, the detection device further includes an air storage tank connected between the air suspension pipe and the air compressor. The air storage tank is used to store the gas output by the air compressor and provide a stable air pressure to the air suspension pipe.

[0011] Through the above technical solution, an air storage tank is used to buffer the output pressure fluctuation of the air compressor, thereby improving the stability of the air suspension and further improving the accuracy of the detection.

[0012] In the present invention, the above-mentioned detection device also includes a variable frequency pressure regulating valve and a negative pressure suction component. The variable frequency pressure regulating valve is connected between the air suspension tube and the air storage tank. The variable frequency pressure regulating valve changes the air pressure entering the air suspension tube to adjust the distance between the glass beads and the open end of the air suspension tube when they are suspended; the negative pressure suction component is vertically inserted into the top of the detection cylinder and has a suction tube. The suction tube is coaxially arranged with the air suspension tube, and the suction tube is used to absorb the glass beads suspended above the air suspension tube.

[0013] Through the above technical solution, the frequency conversion pressure regulating valve can be used to control the suspension height of the glass beads, thereby further raising the glass beads with a refractive index that meets the detection requirements, and using negative pressure suction to suck the qualified glass beads out of the detection cylinder, thereby improving the degree of automation of material removal and further reducing contact damage and contamination.

[0014] In the present invention, the above-mentioned detection device also includes a laser emitter and a laser sensor. The laser emitter is connected to the inner side of the detection cylinder, and the laser emitter emits a number of vertically distributed lasers toward the area between the suction tube and the air suspension tube; the laser sensor is connected to the inner side of the detection cylinder and is arranged corresponding to the laser emitter, and is used to receive the laser refracted by the glass beads and the laser directly irradiated by the laser emitter.

[0015] Through the above technical solution, a laser emitter is used to irradiate the glass beads in an air-suspended state, and the refracted laser light is received by a laser sensor, and then the refractive index of the glass beads is calculated, thereby simplifying the refractive index detection method.

[0016] In the present invention, the laser sensor has a fan-shaped cross section and has a plurality of densely arranged optical fibers. The laser is irradiated onto the optical fibers and then transmitted to the photoresistor through the optical fibers.

[0017] Through the above technical solution, by using optical fiber as the laser collection end, the resolution of the laser sensor can be improved by densely arranging small-diameter optical fibers, further improving the detection accuracy. At the same time, the fan-shaped arrangement improves the efficiency of the optical fiber in receiving the refracted laser.

[0018] In the present invention, the above-mentioned detection device also includes a feed pipe, a storage bin and a discharge tray. The feed pipe is inserted into the side wall of the air suspension tube, and the glass beads are fed into the air suspension tube through the feed pipe; the storage bin is connected to the feed pipe and is used to store glass beads; the discharge tray is rotatably connected between the feed pipe and the storage bin, and transfers one glass bead from the bottom of the storage bin to the feed pipe each time through rotation.

[0019] Through the above technical solution, the storage bin and discharge tray are used to ensure that only one glass bead enters each time, thereby improving the automation and accuracy of feeding.

[0020] In the present invention, the above-mentioned detection device also includes a buffer cup, which is clamped on the inner side of the air suspension tube. The upper opening of the buffer cup is lower than the interface between the feeding tube and the air suspension tube. The bottom of the buffer cup is provided with an air hole, and the diameter of the air hole is smaller than the diameter of the glass beads.

[0021] Through the above technical solution, a buffer cup is used to prevent the glass beads from directly hitting the side wall of the air suspension tube and causing damage when sliding from the feed tube into the air suspension tube, thereby reducing the breakage rate caused by the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 An axonometric diagram of a device for detecting optical properties of road marking glass beads provided by an embodiment of the present invention;

[0024] Figure 2 A front view of a device for detecting optical properties of road marking glass beads provided by an embodiment of the present invention;

[0025] Figure 3 for Figure 2 The sectional view at AA in FIG;

[0026] Figure 4 A side view of a device for detecting optical properties of road marking glass beads provided by an embodiment of the present invention;

[0027] Figure 5 for Figure 4 Cross-sectional view at the middle BB;

[0028] Figure 6 for Figure 5 A local enlarged view of point D in FIG;

[0029] Figure 7 for Figure 4 Cross-sectional view at CC;

[0030] Figure 8 for Figure 2 Cross-sectional view at EE in.

[0031] Icons: 1-Detection tube; 101-Air suspension tube; 102-Laser emitter; 103-Laser sensor; 104-Buffer cup; 1041-Air hole; 1042-Annular slot; 105-Discharge plate; 106-Microwave detector; 2-Inlet pipe; 3-Negative pressure suction assembly; 301-Suction pipe; 4-Feeding assembly; 401-Feeding pipe; 402-Storage bin; 403-Stepping motor; 404-Discharge tray; 4041-Discharge hole; 5-Waste pipe; 6-Varying pressure regulating valve; 7-Air storage tank. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installation," "connection," and "connection" should be understood in a broad sense. For example, they can refer to welding, bolting, or riveting; fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] Example:

[0037] Please refer to Figures 1 to 8 , Figures 1 to 8 An embodiment of the present application is shown.

[0038] This embodiment provides a device for detecting the optical properties of road marking glass beads. Figures 1 to 5 As shown, it includes a detection cylinder 1 and an air suspension tube 101. The detection cylinder 1 forms a semi-enclosed space to reduce the impact of the external environment on the detection; the air suspension tube 101 is vertically inserted into the bottom of the detection cylinder 1. The air suspension tube 101 introduces compressed air into the detection cylinder 1. The compressed air causes the glass beads to suspend above the opening at one end of the air suspension tube 101 inserted into the detection cylinder 1.

[0039] Glass beads used in road markings are blown by compressed air. When the airflow rapidly passes beneath the beads, the Bernoulli principle causes the air pressure to drop due to the high airflow below the beads. However, the air pressure above the beads is relatively high, creating a pressure differential. This pressure differential creates an upward force that overcomes the gravity of the beads, allowing them to remain suspended in the air.

[0040] When using, Figure 3 As shown, the glass beads enter the air suspension tube 101 with a stable air flow, and then are suspended and rise above the upper opening of the air suspension tube 101 under the action of the air flow, enter the detection area and remain stably suspended.

[0041] It should be noted that, in addition to the refractive index, the roundness of the glass beads is also tested for the optical properties. When the roundness of the glass beads is low, the glass beads cannot maintain a stable suspension state after leaving the air suspension tube 101, and the glass beads deviate from the axis of the air suspension tube 101 and fall into the detection cylinder 1. Figure 5 As shown, glass beads with poor roundness slide down through the discharge plate 105 below the detection cylinder 1 and are discharged through the waste pipe 5. At the same time, the waste pipe 5 also has the function of discharging air from the detection cylinder 1 to balance the air pressure inside the detection cylinder 1. Furthermore, the temperature and humidity inside the detection cylinder 1 are controlled by the input compressed air, making it easier to obtain a stable external environment.

[0042] Through the above technical solution, the glass beads are supported by air suspension, which avoids contamination of the glass bead surface by contact clamping, thereby improving the accuracy of detection.

[0043] As a better implementation method, Figure 1 、 Figure 2 and Figure 5 As shown, the above-mentioned detection device also includes an air storage tank 7, which is connected between the air suspension pipe 101 and the air compressor. The air storage tank 7 is used to store the gas output by the air compressor and stably provide stable air pressure to the air suspension pipe 101.

[0044] Through the above technical solution, the air storage tank 7 is used to buffer the output pressure fluctuation of the air compressor, thereby improving the stability of the air suspension and further improving the accuracy of the detection.

[0045] As a better implementation method, Figure 1 and Figure 5 As shown, the above-mentioned detection device also includes a variable frequency pressure regulating valve 6 and a negative pressure suction component 3. The variable frequency pressure regulating valve 6 is connected between the air suspension tube 101 and the air storage tank 7. The variable frequency pressure regulating valve 6 changes the air pressure entering the air suspension tube 101 to adjust the distance between the glass beads and the open end of the air suspension tube 101 when they are suspended; the negative pressure suction component 3 is vertically inserted into the top of the detection tube 1, and has a suction tube 301. The suction tube 301 is coaxially arranged with the air suspension tube 101, and the suction tube 301 is used to absorb the glass beads suspended above the air suspension tube 101.

[0046] During use, the negative pressure suction component 3 mainly comprises a negative pressure generator, which blows in and out horizontally through another external air source, thereby forming a negative pressure zone above the suction tube 301, providing adsorption force for the glass beads below the suction tube 301. The variable frequency pressure regulating valve 6 further increases the air pressure to make the glass beads leave the air suspension tube 101 after the microwave detector 106 senses the glass beads in the air suspension tube 101. After the glass beads refract the laser and obtain qualified parameters, the variable frequency pressure regulating valve 6 further increases the air pressure to make the glass beads rise to the lower end of the suction tube 301 and then be sucked away by the suction tube 301.

[0047] It should be noted that the objects absorbed are glass beads used for road markings, which are microbeads with sizes generally ranging from microns to several millimeters. Taking a glass bead with a diameter of 1 mm as an example, its mass is about 0.01 g.

[0048] Through the above technical solution, the variable frequency pressure regulating valve 6 can be used to control the suspension height of the glass beads, thereby further raising the glass beads with a refractive index that meets the detection requirements, and using negative pressure suction to suck the qualified glass beads out of the detection tube 1, thereby improving the degree of automation of material removal and further reducing contact damage and pollution.

[0049] As a better implementation method, Figure 3 and Figure 7 As shown, the above-mentioned detection device also includes a laser emitter 102 and a laser sensor 103. The laser emitter 102 is connected to the inner side of the detection tube 1, and emits a number of vertically distributed lasers toward the area between the suction tube 301 and the air suspension tube 101; the laser sensor 103 is connected to the inner side of the detection tube 1 and is arranged corresponding to the laser emitter 102, and is used to receive the laser light refracted by the glass beads and the laser light directly irradiated by the laser emitter 102 toward the laser emitter 102.

[0050] During use, the laser emitter 102 emits a laser in the direction of the laser sensor 103. After receiving the laser signal, the laser sensor 103 converts it into an electrical signal and transmits it to the memory and processor for recording and analysis. When the glass bead rises and blocks the laser light path, the laser is refracted after entering the glass bead. The refracted laser shines on different positions of the laser sensor 103 and is also recorded. A standard refracted laser landing point trajectory is generated by the standard glass beads, and then the refracted laser landing point trajectory generated by the test glass beads is compared to obtain the degree of refractive index deviation of the test glass beads.

[0051] Through the above technical solution, the laser emitter 102 is used to irradiate the glass beads in the air suspension state, and the refracted laser light is received by the laser sensor 103 to calculate the refractive index of the glass beads, thereby simplifying the refractive index detection method.

[0052] As a better implementation method, Figure 7 As shown, the laser sensor 103 has a fan-shaped cross section and has a number of densely arranged optical fibers. The laser is irradiated onto the optical fibers and then transmitted to the photoresistor through the optical fibers.

[0053] The optical fiber axially points to the axis of the air suspension tube 101. After receiving the optical signal through the optical fiber with a small diameter, it is transmitted to the photoresistor to complete the conversion of the photoelectric signal.

[0054] Through the above technical solution, by using optical fiber as the laser collection end, the resolution of the laser sensor 103 can be improved by densely arranging small-diameter optical fibers, further improving the detection accuracy. At the same time, the fan-shaped arrangement improves the optical fiber's reception efficiency for refracted laser light.

[0055] As a better implementation method, Figure 5 and Figure 8 As shown, the above-mentioned detection device also includes a feed pipe 401, a storage bin 402 and a discharge tray 404. The feed pipe 401 is inserted into the side wall of the air suspension tube 101, and the glass beads are fed into the air suspension tube 101 through the feed pipe 401; the storage bin 402 is connected to the feed pipe 401 and is used to store the glass beads; the discharge tray 404 is rotatably connected between the feed pipe 401 and the storage bin 402, and is rotated by a fixed angle each time a signal is generated by the stepping motor 403. Each time, a glass bead falls from the bottom of the storage bin 402 into the discharge hole 4041 opened on the discharge tray 404, and then moves into the feed pipe 401 through rotation.

[0056] It should be noted that the feed tube 401 and the suction tube 301 are both made of polymer materials, whose hardness is lower than that of glass beads, while the air suspension tube 101 is made of metal materials, which has better rigidity and stability.

[0057] Through the above technical solution, the storage bin 402 and the discharge tray 404 are used to ensure that only one glass bead enters each time, thereby improving the automation and accuracy of feeding.

[0058] As a better implementation method, Figure 5 and Figure 6 As shown, the above-mentioned detection device also includes a gelatin buffer cup 104, which is clamped to the inner side of the air suspension tube 101 through an annular clamping groove 1042. The upper opening of the buffer cup 104 is lower than the interface between the feed tube 401 and the air suspension tube 101. The bottom of the buffer cup 104 is provided with an air hole 1041, and the diameter of the air hole 1041 is smaller than the diameter of the glass bead.

[0059] During use, the glass beads have inertia after sliding into the feed tube 401 and are difficult to be directly located at the axis of the air suspension tube 101. If the glass beads are directly blown by air, they will collide in the air suspension tube 101, making it difficult to quickly obtain a stable suspension state. However, the glass beads are buffered by the buffer cup 104 and then fall, finally sliding into the air hole 1041 and then being lifted by the air flow, thus quickly obtaining a stable air suspension state.

[0060] Through the above technical solution, the buffer cup 104 is used to prevent the glass beads from directly hitting the side wall of the air suspension tube 101 and causing damage when sliding from the feeding tube 401 into the air suspension tube 101, thereby reducing the damage rate caused by the detection process.

[0061] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A road marking glass bead optical performance detection device, characterized in that: include: The detection tube (1) forms a semi-enclosed space for reducing the influence of the external environment on the detection; An air suspension tube (101) is vertically plugged into the bottom of the detection cylinder (1), and the air suspension tube (101) passes compressed air with a stable airflow into the detection cylinder (1). The compressed air causes glass beads with qualified roundness to be suspended above the opening of one end of the air suspension tube (101) inserted into the detection cylinder (1), and the compressed air causes glass beads with unqualified roundness to deviate from the opening of one end of the air suspension tube (101) inserted into the detection cylinder (1). A laser emitter (102) connected to the inner side of the detection tube (1), the laser emitter (102) emitting laser light towards the glass beads suspended on the air suspension tube (101); A laser sensor (103) connected to the inner side of the detection tube (1), arranged corresponding to the laser emitter (102), and used for receiving the laser light refracted by the suspended glass beads and the laser light directly irradiated by the laser emitter (102) toward the laser emitter (102); A negative pressure suction component (3) is vertically plugged into the top of the detection tube (1), and has a suction tube (301). The suction tube (301) is coaxially arranged with the air suspension tube (101), and the suction tube (301) is used to absorb glass beads suspended above the air suspension tube (101); The feeding assembly (4) is connected to the outside of the detection cylinder (1) and comprises: A feed pipe (401) is plugged into the side wall of the air suspension pipe (101), and the glass beads are fed into the air suspension pipe (101) through the feed pipe (401); A storage bin (402), which is in communication with the feed pipe (401) and is used to store glass beads; A discharge plate (404) is rotatably connected between the feed pipe (401) and the storage bin (402), and transfers a glass bead from the bottom of the storage bin (402) to the feed pipe (401) each time the discharge plate (404) rotates.

2. The optical performance detection device for road marking glass beads according to claim 1, characterized in that: Also includes: The gas storage tank (7) is connected between the gas suspension pipe (101) and the air compressor, and the gas storage tank (7) is used to store the gas output by the air compressor and to provide a stable gas pressure to the gas suspension pipe (101).

3. The optical performance detection device for road marking glass beads according to claim 2, characterized in that: Also includes: A variable frequency pressure regulating valve (6) is connected between the air suspension tube (101) and the air storage tank (7), and the variable frequency pressure regulating valve (6) is used to adjust the air pressure entering the air suspension tube (101), thereby adjusting the distance between the glass beads and the open end of the air suspension tube (101) when the glass beads are suspended.

4. The optical performance detection device for road marking glass beads according to claim 3, characterized in that: The laser emitter (102) emits a plurality of vertically distributed lasers toward the area between the suction tube (301) and the air suspension tube (101).

5. The optical performance detection device for road marking glass beads according to claim 4, characterized in that: The laser sensor (103) has a fan-shaped cross section and comprises a plurality of densely arranged optical fibers. After the laser is irradiated onto the optical fibers, it is transmitted to the photoresistor through the optical fibers.

6. The optical performance detection device for road marking glass beads according to claim 5, characterized in that: Also includes: The buffer cup (104) is clamped on the inner side of the air suspension tube (101); the upper opening of the buffer cup (104) is lower than the interface between the feed tube (401) and the air suspension tube (101); and the bottom of the buffer cup (104) is provided with an air hole (1041); the diameter of the air hole is smaller than the diameter of the glass beads.

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