A device for detecting stress in a quartz capillary tube on line

Abstract

The utility model discloses a device for detecting the internal stress of quartz capillary tube online, which comprises a light source module, a polarized light detection module, a collection and analysis module and a fixing base. The bottom of the fixing base is fixed on a wire drawing tower. A guide rail is arranged on the fixing base. The light source module, the polarized light detection module and the collection and analysis module are sequentially arranged on the guide rail. The light source module can slide along the guide rail and be positioned. The light source module comprises an LED light source, a polarizing mirror and a moving base. The light ray exit end of the LED light source is provided with the polarizing mirror. The LED light source is fixed on the moving base. The moving base is in sliding cooperation with the guide rail. The polarized light detection module comprises a polarizing mirror, an extension support and a connecting base. The extension end of the extension support is connected with the polarizing mirror. The collection and analysis module comprises a camera, a data processor, an extension support and a connecting base. The device can instantly and online detect the internal stress of the quartz capillary tube prepared by the wire drawing tower, realize automatic detection and screening, has high efficiency, and can avoid the problem that the capillary tube is easily damaged during manual screening.

Description

Technical Field

[0001] This utility model relates to the field of quartz capillary production and preparation technology, specifically to a device for online detection of internal stress in quartz capillary tubes. Background Technology

[0002] Stress detection in quartz capillaries is primarily based on their optical anisotropy and photoelastic effects. Internal stress distribution is inferred by analyzing changes in optical parameters caused by stress. Stress detection equipment for quartz capillaries needs to integrate optical sensing mechanisms and precision mechanical motion mechanisms to achieve high-speed data acquisition and rely on intelligent algorithms to analyze and present the detection results.

[0003] Currently, no online stress measurement device is installed on the wire drawing tower equipment on the market. After production, each quartz capillary tube product needs to be tested and screened. This not only leads to low work efficiency, but also makes it impossible to guarantee that the internal stress of each meter of the quartz capillary tube products that finally enter the sales and application stage meets the standard requirements. Utility Model Content

[0004] This invention provides a device for online detection of internal stress in quartz capillaries, aiming to overcome the aforementioned shortcomings in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for online detection of internal stress in quartz capillaries, comprising a light source module, a polarization analyzer module, an acquisition and analysis module, and a fixed base. The bottom of the fixed base is fixed to a wire drawing tower, and a guide rail is provided on the fixed base. The light source module, polarization analyzer module, and acquisition and analysis module are sequentially arranged on the guide rail. The light source module can slide and be positioned along the guide rail. The light source module includes an LED light source, a polarizer, and a movable base. The polarizer is provided at the light emission end of the LED light source. The LED light source is fixed on the movable base, and the movable base is connected to the polarization analyzer module. The guide rail slides together. The polarization analysis module includes an analyzer, a telescopic bracket one, and a connecting seat one. The telescopic bracket one is connected to the guide rail through the connecting seat one, and the telescopic end of the telescopic bracket one is connected to the analyzer. The acquisition and analysis module includes a camera, a data processor, a telescopic bracket two, and a connecting seat two. The telescopic bracket two is connected to the guide rail through the connecting seat two, and the telescopic end of the telescopic bracket two is connected to the camera. The data processor is connected to the camera signal. The polarized light emitted by the light source module passes sequentially through the quartz capillary tube to be tested and the analyzer before being received by the camera.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the LED light source is a monochromatic LED lamp, and the light emitted by the monochromatic LED lamp becomes linearly polarized light after passing through the polarizing mirror.

[0008] Furthermore, the movable seat is provided with an inverted T-shaped groove, and the guide rail is a T-shaped guide rail. The movable seat slides in conjunction with the guide rail through the T-shaped groove.

[0009] Furthermore, the movable seat is also provided with a positioning locking bolt, which, when tightened, abuts against the guide rail or the fixed seat for positioning.

[0010] Furthermore, both the first telescopic bracket and the second telescopic bracket are servo electric push rods.

[0011] Furthermore, the fixing base is elongated, and fixing holes are provided at both ends of the fixing base. The fixing base is fixedly connected to the wire drawing tower by bolts inserted into the fixing holes.

[0012] Furthermore, the camera is a line scan camera.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The device for online detection of internal stress in quartz capillaries provided by this utility model can realize real-time online detection of internal stress in quartz capillaries prepared by drawing towers, collect and analyze detection data in real time, and realize automatic detection and screening. It avoids the problems of low work efficiency and easy to cause capillary scratches or breakage when manual detection and screening of quartz capillaries are required in the prior art.

[0015] The acquisition and analysis module of this device can record the image of alternating bright and dark fringes formed by the mutual interference of polarized light in the XY direction during internal stress detection, as well as the coordinate values ​​of the quartz capillary on the Z axis. When an anomaly is detected in the image analysis, it indicates that the internal stress of the corresponding segment of the quartz capillary is abnormal. The acquisition and analysis module can also be connected to the automatic capillary cutting mechanism to provide the coordinate values ​​of the abnormal segment of the quartz capillary to the automatic cutting mechanism, which will then automatically cut off the abnormal segment. Attached Figure Description

[0016] Figure 1 A schematic diagram of the device for online detection of internal stress in quartz capillaries provided by this utility model;

[0017] Figure 2 for Figure 1 Axonometric view of the device for online detection of internal stress in quartz capillaries;

[0018] Figure 3 for Figure 1 The diagram shows the device for online stress detection of quartz capillary tubes in an inverted installation state.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Fixed base; 2. Guide rail; 3. LED light source; 4. Movable base; 5. Analyzer; 6. Telescopic bracket one; 7. Connecting base one; 8. Camera; 9. Telescopic bracket two; 10. Connecting base two; 11. Fixing hole; 12. Quartz capillary tube to be tested. Detailed Implementation

[0021] The technical solution provided by this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0023] like Figures 1 to 3 As shown, this utility model provides an online device for detecting the internal stress of a quartz capillary, comprising a light source module, a polarization analyzer module, a data acquisition and analysis module, and a fixed base 1. The bottom of the fixed base 1 is fixed to a wire drawing tower, and a guide rail 2 is provided on the fixed base 1. The light source module, polarization analyzer module, and data acquisition and analysis module are sequentially arranged on the guide rail 2. The light source module can slide and be positioned along the guide rail 2. The light source module includes an LED light source 3, a polarizer, and a movable base 4. The polarizer is provided at the light emission end of the LED light source 3. The LED light source 3 is fixed on the movable base 4, and the movable base 4 is slidably engaged with the guide rail 2. The polarization analysis module includes a polarizer 5, a telescopic bracket 6, and a connecting seat 7. The telescopic bracket 6 is connected to the guide rail 2 via the connecting seat 7, and the telescopic end of the telescopic bracket 6 is connected to the polarizer 5. The acquisition and analysis module includes a camera 8, a data processor, a second telescopic bracket 9, and a second connecting seat 10. The second telescopic bracket 9 is connected to the guide rail 2 via the connecting seat 10, and the telescopic end of the second telescopic bracket 9 is connected to the camera 8. The data processor is signal-connected to the camera 8. The polarized light emitted by the light source module passes sequentially through the quartz capillary tube 12 to be tested and the polarizer 5 before being received by the camera 8.

[0024] It should be noted that, as Figure 1As shown, the capillary detection area of ​​the device is located between the light source module and the polarization analyzer module. When the quartz capillary to be tested passes through the detection area, the acquisition and analysis module automatically acquires a polarization interference image. The LED light source of the light source module emits monochromatic light, which becomes linearly polarized light (vibration direction is X-axis) after passing through the polarizer. This linearly polarized light is incident on the stress area and illuminates the quartz capillary to be tested. Due to the photoelastic effect, it is decomposed into polarized light in the X and Y directions (vibration directions are perpendicular to each other), generating a phase difference Δφ. After passing through the analyzer (orthogonal to the polarizer, vibration direction is Y-axis), the two beams of light interfere, forming an image of alternating bright and dark interference fringes. This image is received and acquired by the camera of the acquisition and analysis module, and the data processor performs online real-time analysis and processing on the acquired image.

[0025] In one embodiment of this utility model, the LED light source 3 is a monochromatic LED lamp, and the light emitted by the monochromatic LED lamp becomes linearly polarized light after passing through the polarizing mirror.

[0026] In one embodiment of this utility model, the movable seat 4 is provided with an inverted T-shaped groove, the guide rail 2 is a T-shaped guide rail, and the movable seat 4 slides with the guide rail 2 through the T-shaped groove.

[0027] It is understandable that, in addition to the sliding fit between the movable seat and the guide rail through the aforementioned inverted T-shaped groove and T-shaped guide rail structure, other sliding fit structures familiar to those skilled in the art can also be used, wherein the movable seat can slide back and forth along the guide rail axis, but has almost no degree of freedom in the direction perpendicular to the guide rail.

[0028] In one embodiment of this utility model, the movable seat 4 is further provided with a positioning locking bolt, which abuts against the guide rail 2 or the fixed seat 1 when tightened.

[0029] It should be noted that the positioning locking bolt can be threaded onto one side of the movable seat, and when tightened, it abuts against the side wall of the guide rail for positioning. Alternatively, the movable seat can also have an extension that extends to one side of the fixed seat and folds downward. In this case, the positioning locking bolt is threaded onto the extension, and when tightened, it abuts against the side wall of the fixed seat to achieve positioning.

[0030] In one embodiment of this utility model, the telescopic bracket 6 and the telescopic bracket 9 are both servo electric push rods.

[0031] It should be noted that the servo electric linear actuator can be electrically extended and retracted with high precision, and can adjust the corresponding components to the most suitable height position.

[0032] In one embodiment of this utility model, the fixing base 1 is elongated, and fixing holes 11 are provided at both ends of the fixing base 1. The fixing base 1 is fixedly connected to the wire drawing tower by bolts inserted into the fixing holes 11.

[0033] It should be noted that, in addition to the light source module being able to slide with the fixed base, if necessary, connecting base one and / or connecting base two can also be made to slide with the guide rail of the fixed base.

[0034] In one embodiment of this utility model, the camera 8 is a line scan camera.

[0035] The data processor of the acquisition and analysis module of the online stress detection device for quartz capillaries provided in the above embodiments can calculate the circumferential stress distribution of the quartz capillaries in real time based on the acquired interference images: Input fringe image preprocessing, the spacing and shape of the interference fringes directly reflect the phase difference distribution, and the phase difference is proportional to the stress. Fringe information is extracted through image processing algorithms to infer the stress distribution; the center line of this signal fringe is extracted, and by using a skeletonization algorithm combined with sub-pixel thinning, stress calculation and reconstruction, it is determined whether the capillary stress at that location meets the requirements; when the threshold is exceeded, an audible and visual alarm or other prompts can be triggered, and the precise coordinates of the online Z-axis are output to the automatic capillary trimming mechanism to achieve automatic screening. This utility model can be modularly designed, and the optical lens and motion mechanism can be flexibly configured according to the detection capillary diameter range of 0.1-3mm and the accuracy requirements.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for online detection of internal stress in quartz capillaries, characterized in that, The system includes a light source module, a polarization analyzer module, an acquisition and analysis module, and a mounting base (1). The bottom of the mounting base (1) is fixed to the wire drawing tower. A guide rail (2) is provided on the mounting base (1). The light source module, polarization analyzer module, and acquisition and analysis module are sequentially mounted on the guide rail (2). The light source module can slide and be positioned along the guide rail (2). The light source module includes an LED light source (3), a polarizer, and a movable base (4). The polarizer is provided at the light emission end of the LED light source (3). The LED light source (3) is fixed on the movable base (4). The movable base (4) slides with the guide rail (2). The polarization analyzer module includes a polarizer (5), a telescopic bracket (6), and a... Connecting seat one (7), the telescopic bracket one (6) is connected to the guide rail (2) through the connecting seat one (7), the telescopic end of the telescopic bracket one (6) is connected to the analyzer (5), the acquisition and analysis module includes a camera (8), a data processor, a telescopic bracket two (9) and a connecting seat two (10), the telescopic bracket two (9) is connected to the guide rail (2) through the connecting seat two (10), the telescopic end of the telescopic bracket two (9) is connected to the camera (8), the data processor is signal connected to the camera (8), the polarized light emitted by the light source module passes through the quartz capillary tube (12) to be tested and the analyzer (5) in sequence and is received by the camera (8).

2. The device for online detection of internal stress in a quartz capillary according to claim 1, characterized in that, The LED light source (3) is a monochrome LED lamp, and the light emitted by the monochrome LED lamp becomes linearly polarized light after passing through the polarizing mirror.

3. The device for online detection of internal stress in a quartz capillary according to claim 1, characterized in that, The movable seat (4) is provided with an inverted T-shaped groove, and the guide rail (2) is a T-shaped guide rail. The movable seat (4) slides with the guide rail (2) through the T-shaped groove.

4. The device for online detection of internal stress in a quartz capillary according to claim 3, characterized in that, The movable seat (4) is also provided with a positioning locking bolt, which is tightened to abut against the guide rail (2) or the fixed seat (1) when tightened.

5. The device for online detection of internal stress in a quartz capillary according to claim 1, characterized in that, Both the first telescopic bracket (6) and the second telescopic bracket (9) are servo electric push rods.

6. The apparatus for online detection of internal stress in a quartz capillary according to any one of claims 1 to 5, characterized in that, The fixing seat (1) is long and narrow, and the fixing holes (11) are provided at both ends of the fixing seat (1). The fixing seat (1) is fixedly connected to the wire drawing tower by bolts inserted into the fixing holes (11).

7. The device for online detection of internal stress in a quartz capillary according to claim 6, characterized in that, The camera (8) is a line array camera.

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