A fiber dispersion testing method based on multi-angle image analysis

Abstract

The present invention relates to a fiber dispersion test method based on multi-angle image analysis, which belongs to the technical field of fiber dispersion test and solves the problems of low fiber dispersion efficiency and difficulty in observing dispersion effect in the prior art. The dispersion test method of the present invention comprises: step S1: preparing a fiber bundle to be tested; step S2: placing the fiber bundle to be tested into an observation container, and injecting a dispersion medium into the observation container; step S3: placing the observation container into a test device, and driving the observation container to rotate through a second driving component to achieve dispersion of the fiber bundle to be tested; step S4: driving the first shooting component and the second shooting component to move through the first driving component, and at the same time, the first shooting component and the second shooting component observe the container and its internal liquid for multi-angle shooting to obtain the dispersion information of the fiber. The present invention realizes the rapid dispersion of fibers and multi-angle observation of the fiber dispersion state.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber dispersion testing, and in particular to a fiber dispersion testing method based on multi-angle image analysis. Background Art

[0002] Fiber materials are widely used in various industries and daily life. According to the source of raw materials, fibers can be generally divided into natural fibers, artificial fibers, synthetic fibers, inorganic fibers and metal fibers. Testing the dispersion of fibers is of great significance for the evaluation of their own performance, the manufacture of composite fibers and the application of fibers in composite materials.

[0003] For example: Dispersibility is one of the very important factors in the process of making metal fibers into fiber felt, which affects the air permeability, filtration and other properties of the fiber felt. The uniform dispersion of fibers in water (or dispersion medium) is conducive to the uniform mixing between fibers and is an important indicator for the preparation of fiber composite materials. Adding fibers to material slurry (concrete mortar) after chopped fibers can improve material properties, and the dispersion of fibers affects the effect of improving material properties. Characterizing and evaluating the degree of dispersion of fibers under different test conditions is an important way to study fiber properties. However, there is still a lack of efficient and reliable equipment for the preparation of fiber mixed solvents and the observation and evaluation of the degree of mixing.

[0004] Therefore, the present invention provides a fast discrete fiber dispersibility testing device for realizing fast dispersion of fibers in a dispersion medium (water or other solutions) and observing the dispersibility of the fibers. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a fast discrete fiber dispersion testing device to solve the problem that the existing fiber dispersion test is inaccurate and incomplete in fiber dispersion assessment.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A fiber dispersion testing method based on multi-angle image analysis, comprising:

[0008] Step S1: preparing a fiber tow to be tested;

[0009] Step S2: placing the fiber bundle to be tested into an observation container, and injecting a dispersion medium into the observation container;

[0010] Step S3: placing the observation container into the testing device, and driving the observation container to rotate by the second driving component to achieve dispersion of the fiber tow to be tested;

[0011] Step S4: The first driving component drives the first shooting component and the second shooting component to move, and the first shooting component and the second shooting component observe the container and the liquid inside the container to take multi-angle shots to obtain the dispersion information of the fiber.

[0012] Furthermore, in the step S1, the chopped fiber bundle is dyed.

[0013] Furthermore, in step S3, a lighting device is installed inside the testing device to achieve independent lighting.

[0014] Furthermore, in step S3, the dispersion of the fiber bundles in the observation container is as follows:

[0015] Step S31: plug and connect the central spline shaft at the bottom of the observation container with the rotating spline shaft, and plug and connect the arc-shaped plug-in portion at the bottom of the observation container with the positioning plate;

[0016] Step S32: the second driving assembly includes: a planetary gear system and a second driving motor, the planetary gear system includes: a sun gear, planetary gears and an inner ring gear, the second driving motor drives the sun gear of the planetary gear system to rotate; the sun gear meshes with the planetary gears, and then the inner ring gear and the sun gear are driven to rotate in the opposite direction through the planetary gears;

[0017] Step S33: the rotating spline shaft is fixedly connected to the sun gear of the planetary gear train, and the rotating drive plate is fixedly connected to the inner gear ring of the planetary gear train; the inner gear ring and the sun gear rotate in the opposite direction, driving the central spline shaft and the observation container to rotate in the opposite direction;

[0018] Step S34: the central spline shaft is fixedly connected to a disturbance component rotatably mounted inside the observation container; the disturbance component and the observation container rotate in opposite directions, causing the disturbance component to stir the liquid in the observation container to disperse the fiber bundles.

[0019] Furthermore, in step S3, when the observation container rotates, it can drive the liquid in the observation container to rotate; when the liquid rotates, it moves from the center of the observation container toward the wall of the observation container under the action of centrifugal force, and at the same time, multiple vortices are generated under the guiding action of multiple arc-shaped guide plates, so that laminar flow and vortex occur in the liquid in the observation container.

[0020] Furthermore, the first shooting component drives the high-speed camera to move in the following manner:

[0021] Step S41: the first shooting assembly includes: an arc-shaped positioning rail, a rotating motion bracket, a lens mounting bracket and a high-speed camera; the rotating motion bracket is nested and installed on the outer side of the arc-shaped positioning rail, and the two can slide relative to each other; the first driving assembly drives the arc-shaped rack on the outer side of the rotating motion bracket to rotate through the second rotating gear;

[0022] Step S42: the lens mounting bracket is fixedly mounted on the rotating motion bracket, and the high-speed camera is fixedly mounted on the end thereof; during the rotation of the arc-shaped rack, the rotating motion bracket rotates around its own axis, and at the same time drives the lens mounting bracket to rotate around the observation container;

[0023] Step S43: the lens mounting bracket drives the high-speed camera to rotate synchronously to realize the arc movement of the high-speed camera, and the high-speed camera is always aimed at the observation container.

[0024] Further, in step S3, the testing device includes: a first shooting component, a second shooting component, an observation container, a first driving component and a second driving component; the second shooting component has the same structure as the first shooting component, and the first shooting component is vertically arranged, and the second shooting component is horizontally arranged.

[0025] Furthermore, in step S3, the observation container is arranged below the first shooting component; the second shooting component is in an arc shape as a whole, and the observation container and the second shooting component are arranged coaxially.

[0026] Furthermore, in step S4, when the high-speed camera of the second shooting assembly is displaced, the high-speed camera moves in a circumferential direction of the observation container, and the distance between the high-speed camera and the observation container remains unchanged.

[0027] Furthermore, in step S3, a heating component is provided inside the testing device, and the temperature of the observation container is controlled by the heating component, so that the dispersion of the fiber at different temperatures can be tested.

[0028] The technical solution of the present invention can achieve at least one of the following effects:

[0029] 1. The fiber dispersion testing method based on multi-angle image analysis of the present invention drives the disturbance component to rotate through the second driving component to achieve rapid dispersion of the fiber bundles in the dispersion medium; after the fiber dispersion is completed, the fibers in the dispersed state in the observation container can be photographed by a high-speed camera to achieve real-time shooting of the fiber solution state and obtain photos / videos of the fiber dispersion.

[0030] 2. The fiber dispersion testing method based on multi-angle image analysis of the present invention can obtain the three-dimensional state of the fiber in the water body by providing a first shooting component and a second shooting component to respectively shoot the fiber dispersion state from the top and the side of the observation container; wherein the first shooting component is vertically arranged to shoot the solution image in a top-down state; the second shooting component is horizontally arranged to shoot the solution image in a side-view state. Compared with the current dispersion analysis of static solution shooting or simple transmittance analysis, the fiber dispersion image obtained by the testing device of the present invention is more accurate and can more intuitively obtain the fiber dispersion state.

[0031] 3. In the fiber dispersion testing method based on multi-angle image analysis of the present invention, the first shooting component and the second shooting component are both arc motion mechanisms, and the high-speed cameras of the two shooting components are synchronously driven by motors to perform arc motion. During the arc motion of the high-speed cameras, the fiber solution can be continuously photographed from multiple angles, and multiple groups of images of the fiber solution can be obtained. By analyzing the multi-angle images of the multiple groups of fiber solutions taken by the high-speed camera at different times, the dispersion efficiency and dispersion degree information of the fibers in the solution can be obtained.

[0032] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0034] Figure 1 It is a flow chart of the fiber dispersion testing method based on multi-angle image analysis of the present invention;

[0035] Figure 2 It is a schematic diagram of the composition of the test device;

[0036] Figure 3 It is a schematic diagram of the structure of a Y-shaped bracket;

[0037] Figure 4 is a rear view of the image acquisition mechanism;

[0038] Figure 5 for Figure 4 A left view of the image acquisition mechanism in FIG.

[0039] Figure 6is a schematic diagram of the structure of the first shooting component;

[0040] Figure 7 is a schematic diagram of the motion state of the first shooting component;

[0041] Figure 8 It is a schematic diagram of the structural composition of the arc positioning rail;

[0042] Fig. 9 It is a schematic diagram of the structural composition of the rotary motion bracket;

[0043] Fig.10 Schematic diagram of the structural composition of the components for preparing the fiber solution;

[0044] Fig.11 is a schematic structural diagram of a second drive assembly;

[0045] Fig.12 is a schematic diagram of the internal structure of the second drive assembly;

[0046] Fig.13 This is a schematic diagram of the structure of the observation container;

[0047] Fig.14 One of the top views of the observation container when the disturbance part is rotating;

[0048] Fig.15 This is the second top view of the observation container when the disturbance part is rotating.

[0049] Reference numerals:

[0050] 1-device housing; 2-first shooting assembly; 3-second shooting assembly; 4-power distribution assembly; 5-first drive motor; 6-observation container; 7-container fixing assembly; 8-second drive motor; 9-Y-shaped bracket;

[0051] 201-arc positioning rail; 202-rotating motion bracket; 203-lens mounting bracket; 204-high-speed camera; 205-rolling pulley; 2011-limiting card slot; 2012-arc sliding slot; 2013-strip through hole;

[0052] 401-first rotating gear; 402-first bevel gear, 403-second bevel gear, 404-first rotating shaft; 405-first transmission gear, 406-second transmission gear; 407-second rotating gear; 408-second rotating shaft; 409-first bearing; 410-second bearing;

[0053] 601-central spline shaft, 602-arc-shaped plug-in part; 603-disturbance component; 604-arc-shaped guide plate; 605-rectangular slot;

[0054] 701-rotating spline shaft, 702-inner gear ring; 703-rotating drive plate, 704-sun gear, 705-planetary gear; 706-positioning plate; 707-arc-shaped plug hole. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0056] Example 1

[0057] A specific embodiment of the present invention is a fiber dispersion testing method based on multi-angle image analysis, such as Figure 1 As shown, including:

[0058] Step S1: preparing a fiber tow to be tested;

[0059] Step S2: placing the fiber bundle to be tested into the observation container 6, and injecting a dispersion medium into the observation container 6;

[0060] Step S3: placing the observation container 6 into the testing device, and driving the observation container 6 to rotate by the second driving component to achieve dispersion of the fiber tow to be tested;

[0061] Step S4: The first driving component drives the first shooting component 2 and the second shooting component 3 to move, and the first shooting component 2 and the second shooting component 3 simultaneously shoot the observation container 6 and the liquid therein at multiple angles to obtain the dispersion information of the fibers.

[0062] Furthermore, in the step S1, the chopped fiber bundle is dyed.

[0063] Furthermore, in step S3, a lighting device is installed inside the testing device to achieve independent lighting.

[0064] In step S2, the side wall of the observation container 6 is made of transparent material; the bottom of the observation container 6 is painted black to achieve observation and comparison of the fiber state inside the observation container 6 from a top view. Figure 2 As shown, the device housing 1 of the testing apparatus is disposed on the outside of the first shooting component 2, the second shooting component 3, the first driving component and the second driving component, and the inner wall surface of the device housing 1 is painted black.

[0065] Further, in step S3, if Figure 2-Figure 7As shown, the testing device includes: a first shooting component 2, a second shooting component 3, an observation container 6, a first driving component and a second driving component; the second shooting component 3 has the same structure as the first shooting component 2, and the first shooting component 2 is vertically arranged, and the second shooting component 3 is horizontally arranged.

[0066] Furthermore, in step S3, the observation container 6 is disposed below the first shooting component 2; the second shooting component 3 is in an arc shape as a whole, and the observation container 6 and the second shooting component 3 are disposed coaxially.

[0067] Furthermore, in step S3, a heating component is provided inside the testing device, and the temperature of the observation container 6 is controlled by the heating component, so that the influence of temperature on the dispersion effect of the fibers can be analyzed.

[0068] The preferred implementation of steps S2 to S4 is described in detail below:

[0069] (I) Step S2:

[0070] In a specific embodiment of the present invention, Fig.13 , Fig.14 , Fig.15 As shown, the observation container 6 includes: a cup body, a central spline shaft 601, an arc-shaped plug-in portion 602 and a disturbance component 603; the central spline shaft 601 is rotatably connected to the bottom plate of the cup body and is rotationally sealed, its upper end is fixedly connected to the disturbance component 603, and a spline connection portion is arranged at the lower end; a plurality of arc-shaped plug-in portions 602 are fixedly arranged at the bottom of the cup body.

[0071] Specifically, the end of the central spline shaft 601 extends out of the bottom plate of the cup body and can be connected to the rotating spline shaft 701 of the container fixing assembly by spline plugging, and then the central spline shaft 601 and the disturbance component can be driven to rotate by the rotation of the rotating spline shaft. Fig.13 As shown, one or more disturbance components 603 are disposed outside the central spline shaft 601 ; illustratively, three disturbance components 603 are disposed.

[0072] Furthermore, in step S2, an arc-shaped guide plate 604 is fixedly provided inside the cup body of the observation container 6; one or more arc-shaped guide plates 604 are provided on the inner wall of the cup body. Fig.14 , Fig.15As shown, there are three arc-shaped guide plates 604, and the three arc-shaped guide plates 604 are evenly spaced in the circumferential direction of the cup body. A plurality of rectangular slots 605 are arranged in parallel on the outer side of the disturbance component 603; the rectangular slots 605 enable the disturbance component 603 to form a comb-tooth structure, and then when the disturbance component rotates, it can circulate and stir the liquid in the cup body to flow in layers, promoting the mixing of the fibers in the liquid with the liquid. Preferably, the width of the rectangular slots 605 is 5 to 12 mm.

[0073] In a specific embodiment of the present invention, the disturbance component 603 and the arc guide plate 604 are both arc plate structures, and the two can be assembled into a semicircular component; when the disturbance component 603 is driven by the second driving component to rotate, it can drive the fiber solution inside the observation container 6 to rotate, and when the fiber solution rotates, it impacts the arc guide plate 604 to disperse the fiber to be tested. Fig.15 As shown, when the disturbance component 603 rotates to the minimum distance from the arc-shaped guide plate 604, the disturbance component 603 and the arc-shaped guide plate 604 divide the internal space of the observation container 6 into three cavities, and the liquid can flow between the several cavities through the rectangular groove 605 of the disturbance component 603; in this embodiment, the rapid dispersion of fibers in the water body is achieved by setting the disturbance component 603 and the arc-shaped guide plate 604.

[0074] Furthermore, in order to facilitate taking photos or videos of the state of the fiber solution in the observation container 6, in the present invention, the sides of the disturbance component 603 and the arc-shaped guide plate 604 are painted black.

[0075] (II) Step S3:

[0076] In step S3, Fig.10 , Fig.11 , Fig.12 As shown, the second driving assembly includes: a container fixing assembly 7 and a second driving motor 8; the second driving motor 8 is used to drive the container fixing assembly 7 to rotate; the observation container 6 is detachably mounted on the container fixing assembly 7.

[0077] Specifically, the container fixing assembly 7 includes: a rotating spline shaft 701, an inner gear ring 702; a rotating drive disk 703, a sun gear 704, a planetary gear 705 and a positioning disk 706. The sun gear 704 is driven to rotate by the second driving motor 8; one side of the planetary gear 705 is meshed with the sun gear 704 for transmission, and the other side is meshed with the inner gear ring 702 for transmission; the sun gear 704 rotates in the opposite direction to the inner gear ring 702; the inner gear ring 702 is fixedly mounted on the inner side of the rotating drive disk 703; the positioning disk 706 is arranged above the rotating drive disk 703 and the two are fixedly connected; the rotating spline shaft 701 is fixedly mounted above the sun gear 704 and plug-connected with the spline connection portion; the positioning disk 706 is provided with an arc-shaped plug-in hole 707 which is plug-connected with the arc-shaped plug-in portion 602.

[0078] Specifically, the planetary gear 705 is rotatably mounted on the planetary gear carrier via a rotating shaft, and the planetary gear carrier is rotatably mounted on the outside of the drive shaft; the sun gear 704 is fixedly mounted on the outside of the drive shaft, and the drive shaft is fixedly connected to the output shaft of the second drive motor 8, so that the rotational motion output by the second drive motor 8 can drive the sun gear 704 to rotate.

[0079] Specifically, Fig.10 , Fig.11 , Fig.12 As shown, a plurality of first threaded holes are arranged on the bottom end surface of the positioning disk 706, and a plurality of second threaded holes are arranged on the rotating drive disk 703 correspondingly. Screws are installed in the first threaded holes and the second threaded holes, and the positioning disk 706 and the rotating drive disk 703 are connected and fixed by screws.

[0080] Specifically, the equipment housing 1 of the testing device includes: a base plate and a middle partition; the second drive motor 8 is fixedly mounted on the base plate, the middle partition is arranged parallel to the base plate, and the upper surface of the middle partition is flush with the upper surface of the rotating spline shaft 701 and the positioning plate 706.

[0081] Specifically, the rotating spline shaft 701 and the positioning disk 706 are rotatably connected via a bearing; and the rotating spline shaft 701 is coaxially arranged inside the positioning disk 706. The positioning disk 706 is rotatably mounted on the middle partition (not shown) of the device housing 1 via a bearing. The positioning disk 706 is a stepped disk structure; that is, the positioning disk 706 includes a plurality of annular disks of different diameters, and the plurality of annular disks are sequentially connected from top to bottom according to the diameter size.

[0082] Furthermore, the uppermost end of the positioning disk 706 is rotationally connected to the rotating spline shaft 701 through the first bearing. In addition, a first sealing ring is provided on the upper side of the first bearing for sealing, and the first sealing ring is bonded and fixed to the outer surface of the rotating spline shaft 701 or the inner ring surface of the positioning disk 706; when the rotating spline shaft 701 and the positioning disk 706 rotate relative to each other, the first sealing ring and the positioning disk 706 rotate relative to each other by friction. The positioning disk 706 is rotationally connected to the middle partition through the second bearing, and a second sealing ring is provided on the upper part of the second bearing for sealing, and the second sealing ring is bonded and fixed to one of the middle partition or the positioning disk 701.

[0083] In a specific embodiment of the present invention, in step S3, the fiber bundles in the observation container 6 are dispersed in the following manner:

[0084] Step S31: plug and connect the central spline shaft 60) at the bottom of the observation container 6 with the rotating spline shaft 701, and plug and connect the arc-shaped plug-in portion 602 at the bottom of the observation container 6 with the positioning disk 706; realize the connection between the observation container 6 and the second drive assembly.

[0085] Step S32: The second driving assembly includes: a planetary gear system and a second driving motor 8, wherein the second driving motor 8 is used to drive the planetary gear system to rotate; the planetary gear system includes: a sun gear 704, planetary gears 705 and an inner ring gear 702, and when the sun gear 704 rotates, the inner ring gear 702 rotates in the opposite direction.

[0086] Specifically, when the second drive motor 8 drives the sun gear 704 to rotate, the sun gear 704 meshes with the planetary gear 705, driving the planetary gear 705 to rotate while revolving around the sun gear 704; when the planetary gear 705 rotates, it can drive the inner ring gear 702 to rotate, and the inner ring gear 702 is fixed as a whole with the rotating drive disk 703, thereby driving the rotating drive disk 703 to rotate. Specifically, the inner ring gear 702 rotates in the opposite direction to the sun gear 704;

[0087] Step S33: The lower end of the rotating spline shaft 701 is fixedly connected to the sun gear 704 of the planetary gear system, and the upper end is plug-connected to the center spline shaft 601, driving the center spline shaft 601 to rotate; the lower end of the positioning plate 706 is fixedly connected to the rotating drive plate 703, and the upper end is plug-connected to the main body of the observation container 6; when the second drive motor 8 drives the sun gear 704 and the rotating drive plate 703 to rotate, the center spline shaft 601 and the main body of the observation container 6 rotate synchronously; specifically, the inner gear ring 702 has an opposite rotation direction to the sun gear 704, and the center spline shaft 601 has an opposite rotation direction to the main body of the observation container 6.

[0088] Step S34: The central spline shaft 601 is fixedly connected to the disturbance component 603 rotatably installed inside the observation container 6, driving the disturbance component 603 to rotate; specifically, the central spline shaft 601 and the positioning plate 706 drive the disturbance component 603 and the observation container 6 to rotate in the opposite direction, and the rotational movement of the disturbance component 603 can disturb the liquid and fiber in the observation container 6, thereby promoting rapid mixing of the fiber and liquid.

[0089] Step S34: When the main body of the observation container 6 rotates, it can drive the liquid in the observation container 6 to rotate; when the liquid rotates, it moves from the center of the observation container 6 toward the wall of the observation container 6 under the action of centrifugal force, and rotates along the inner wall of the observation container 6. At the same time, multiple vortices are generated under the guidance of multiple arc-shaped guide plates 604, so that the liquid in the observation container 6 has laminar flow and vortex.

[0090] Specifically, in step S34 , the main body of the observation container 6 and the disturbance component 603 rotate in opposite directions, and the rotation speed of the disturbance component 603 is greater than the rotation speed of the main structure of the observation container 6 .

[0091] In the step S3, the fiber dispersion observation device with dual-track observation of the present invention is also provided with a heating component; the heating component is an electric heating wire integrated on the observation container positioning component 7, and the observation container positioning component 7 is heated by the electric heating wire, thereby being able to test the dispersion performance of the fiber in solutions of different temperatures.

[0092] Specifically, the electric heating wire is nested inside the positioning disk 706 of the observation container positioning assembly 7, and the electric heating wire is powered by a conductive slip ring. The inner ring of the conductive slip ring is fixedly connected to the outer side of the positioning disk 706, and the outer ring of the conductive slip ring is fixedly connected to the base of the device housing 1. Specifically, the conductive slip ring is arranged outside the second-stage annular disk of the positioning disk 706.

[0093] (III) Step S4:

[0094] In step S4, Figure 6-Figure 9As shown, the first shooting component 2 includes: an arc-shaped positioning rail 201, a rotating motion bracket 202, a lens mounting bracket 203 and a high-speed camera 204; the rotating motion bracket 202 can slide along the arc-shaped positioning rail 201 under the drive of the first driving component, the lens mounting bracket 203 is fixedly mounted on the rotating motion bracket 202, and the high-speed camera 204 is fixedly mounted at the end; the observation container 6 is arranged below the first shooting component 2 and is located on the inner side of the second shooting component 3; the observation container 6 is used to store the dispersion medium and the fiber to be tested, and can rotate under the drive of the second driving component, thereby realizing the dispersion of the fiber to be tested in the dispersion medium; the high-speed camera 204 is used to shoot the dispersed fiber solution.

[0095] Specifically, the arc-shaped positioning rail 201 of the first shooting assembly 2 and the second shooting assembly 3 is a semicircular structure. The rotating motion bracket 202 of the first shooting assembly 2 and the second shooting assembly 3 is a semicircular or arc-shaped structure. Preferably, in order to ensure the shooting angle, the central angle corresponding to the arc structure of the rotating motion bracket 202 is not less than 60° and not more than 180°.

[0096] In step S4, the second shooting component 3 has the same structural composition and motion principle as the first shooting component 2. Therefore, the second shooting component 3 can also realize circular motion around the observation container 6. When the second shooting component 3 of the present invention drives its high-speed camera 204 to perform multi-angle shooting around the side of the observation container 6, side views of the observation container 6 in different directions can be obtained.

[0097] Furthermore, in the present invention, the image acquisition process and the disturbance dispersion process of the fiber can be carried out simultaneously, so that the fiber dispersion speed, the ease of dispersion of the fiber in different solutions, the final dispersion degree of the fiber, the degree of re-aggregation / entanglement of the fiber after dispersion and other information can be obtained for real-time monitoring.

[0098] Furthermore, if Figure 2 , Figure 3 As shown, the first shooting component 2 and the second shooting component 3 are both fixedly connected to the device housing 1 through a Y-shaped bracket 9; the arc-shaped positioning rail 201 of the first shooting component 2 / the second shooting component 3 is clamped in the middle slot of the Y-shaped bracket, and is fixedly connected to the Y-shaped bracket 9 through screws.

[0099] Furthermore, the first drive motor 5 and the second drive motor 8 are both fixedly connected to the inner wall of the device housing 1 by bolts. Specifically, a boss portion for mounting the first drive motor 5 is provided on the inner wall of the device housing 1, and the second drive motor 8 is fixedly mounted above the base of the device housing 1.

[0100] In a specific embodiment of the present invention, a lighting device is also provided on the inner wall surface of the device housing 1; preferably, the lighting device is an LED light strip. Alternatively, the lighting device is a lighting lamp and an annular lampshade, which is provided above the second shooting assembly and is a conical structure with an opening facing downward.

[0101] like Figure 8 , Fig. 9 As shown, an arc-shaped groove 2012 is arranged on the outer side of the arc-shaped positioning rail 201; the rotating motion bracket 202 is embedded in the arc-shaped groove 2012, and an arc-shaped rack protruding from the arc-shaped positioning rail 201 is arranged on the outer side of the rotating motion bracket 202; the arc-shaped rack is driven to rotate by the first driving component, and the rotating motion bracket 202 slides in the arc-shaped groove 2012 when the arc-shaped rack rotates; during the sliding process of the rotating motion bracket 202 in the arc-shaped groove 2012, the lens mounting bracket 203 drives the high-speed camera 204 to deflect left and right.

[0102] Furthermore, if Figure 6 , Figure 7 As shown, a limiting slot 2011 is provided on the inner side of the arc-shaped positioning rail 201, and a strip-shaped through hole 2013 is provided between the limiting slot 2011 and the arc-shaped slide groove 2012; one end of the lens mounting bracket 203 is fixedly connected to the rotating motion bracket 202, and the other end passes through the strip-shaped through hole 2013 and is fixedly connected to the high-speed camera 204.

[0103] Furthermore, two rolling pulleys 205 are rotatably mounted on both sides of the lens mounting bracket 203; the rolling pulleys 205 are arranged on the inner side of the arc-shaped positioning rail 201, and are in rolling contact with the arc-shaped wall surface of the limiting card slot 2011. The rolling pulley 205 has the function of limiting the rotational motion bracket 202 from separating from the arc-shaped positioning rail 201. At the same time, the rolling pulley 205 rolls along the limiting card slot 2011 on the lower surface of the arc-shaped positioning rail 201. The central angle corresponding to the limiting card slot 2011 is the rotation angle of the rotational motion bracket 202, and is also the deflection angle of the lens mounting bracket 203. By setting the rolling pulley 205, the movement trajectory of the high-speed camera 204 is limited.

[0104] In the present invention, a lens mounting bracket 203 is provided to pass through the strip-shaped through hole 2013, and a high-speed camera 204 is installed at the lower end of the lens mounting bracket 203, realizing an unobstructed design on the inner side of the arc-shaped positioning rail 201, ensuring that when the high-speed camera 204 observes the observation container 6 and the state of the solution therein, it can avoid obstruction of the lens by the moving mechanism or other structures, thereby ensuring the continuity and integrity of image information acquisition.

[0105] like Figure 6 , Figure 7 As shown, when the first rotating gear 401 and the second rotating gear 407 of the first driving assembly rotate, they can respectively drive the rotating motion bracket 202 of the first shooting assembly 2 and the second shooting assembly 3 to rotate. When the rotating motion bracket 202 rotates, it drives the lens mounting bracket 203 fixedly installed in the middle thereof to rotate around the center (center of the circle) of the arc-shaped positioning rail 201, and at the same time, the rolling pulley 205 rolls along the lower surface of the arc-shaped positioning rail 201.

[0106] Furthermore, the first shooting component 2 drives the high-speed camera 204 to move in the following manner:

[0107] Step S41: the first shooting assembly 2 comprises: an arc-shaped positioning rail 201, a rotating motion bracket 202, a lens mounting bracket 203 and a high-speed camera 204; the rotating motion bracket 202 is nested and installed on the outer side of the arc-shaped positioning rail 201, and the two can slide relative to each other; the first driving assembly drives the arc-shaped rack on the outer side of the rotating motion bracket 202 to rotate through the second rotating gear 407;

[0108] Step S42: the lens mounting bracket 203 is fixedly mounted on the rotating motion bracket 202, and the high-speed camera 204 is fixedly mounted on the end thereof; during the rotation of the arc-shaped rack, the rotating motion bracket 202 rotates around its own axis, and at the same time drives the lens mounting bracket 203 to rotate around the observation container 6;

[0109] Step S43: the lens mounting bracket 203 drives the high-speed camera 204 to rotate synchronously, so that the high-speed camera 204 can move in an arc and the high-speed camera 204 is always aligned with the observation container 6 .

[0110] Furthermore, in step S4, the second shooting component 3 has the same movement principle as the first shooting component 2; when the high-speed camera 204 of the second shooting component 3 is displaced, the high-speed camera 204 moves around the circumferential direction of the observation container 6, and the distance from the observation container 6 remains unchanged.

[0111] In the step S4, when the first shooting component 2 moves, its high-speed camera 204 can make a circular motion around the observation container 6 above the observation container 6, and take multi-angle photos of the observation container 6 from above, so as to obtain a top-down state image of the observation container 6 and the solution inside it; when the second shooting component 3 moves, its high-speed camera can make a circular motion around the observation container 6 on the side of the observation container 6, and take multi-angle photos of the observation container 6 on the side of the observation container 6, so as to obtain a side circular perspective of the observation container 6 and the solution inside it.

[0112] In step S4, the top view and top side view of the observation container 6 obtained by the first shooting component 2 and the multi-directional side view of the observation container 6 in the circumferential direction obtained by the second shooting component 3 are combined to obtain the three-dimensional distribution information of the dispersion state of the fibers in the observation container 6, thereby accurately characterizing the dispersion performance of different types of fibers in the liquid. Compared with the existing visual observation method, transmittance analysis method and single-direction photography method, the present invention can obtain more accurate and comprehensive dispersion state information.

[0113] In the step S4, the present invention further provides an information collection module and a control module.

[0114] Specifically, the information acquisition module can receive and store image information collected by two high-speed cameras 204. Specifically, the control module uses a PID controller to control the start, stop and output rotation speed of the first and second drive components.

[0115] In step S4, after acquiring the image information, the researchers analyze the image information by directly observing it or importing the image information into image processing software for post-processing and analyzing the degree of fiber discreteness.

[0116] (IV) Driving method of the shooting component:

[0117] In step S4, the first driving component includes: a first driving motor 5 and a power distribution component 4; the first driving motor 5 is used to input rotational power to the power distribution component 4; the power distribution component 4 can divide the rotational power into two paths, thereby synchronously driving the two high-speed cameras 204 of the first shooting component 2 and the second shooting component 3 to move synchronously.

[0118] In a specific embodiment of the present invention, the power distribution assembly includes: a first rotating gear 401, a first bevel gear 402, a second bevel gear 403, a first transmission gear 405, a second transmission gear 406 and a second rotating gear 407; the first rotating gear 401 is meshed with the arc rack of the second shooting assembly 3 for transmission, and the second rotating gear 407 is meshed with the arc rack of the first shooting assembly 2 for transmission; the first rotating gear 401 and the first bevel gear 402 share a rotating axis; the second bevel gear 403 is meshed with the first bevel gear 402, and at the same time shares a rotating axis with the first transmission gear 405; the second transmission gear 406 is meshed with the first transmission gear 405 for transmission, and shares a rotating axis with the second rotating gear 407.

[0119] Specifically, Figure 2 , Figure 4 , Figure 5As shown, the second bevel gear 403 and the first transmission gear 405 are both fixedly mounted on the first rotating shaft 404, and the end of the first rotating shaft 404 is rotatably connected to the inner wall of the device housing 1 through the second bearing 410; thus, the second bevel gear 403 and the first transmission gear 405 can rotate synchronously.

[0120] Specifically, Figure 2 , Figure 4 , Figure 5 As shown, the second transmission gear 406 and the second rotating gear 407 are both fixedly mounted on the second rotating shaft 408, and the end of the second rotating shaft 408 is rotatably connected to the inner wall of the device housing 1 through the first bearing 409, so that the second transmission gear 406 and the second rotating gear 407 rotate synchronously. Preferably, the transmission ratio between the first bevel gear 402 and the second bevel gear 403 and between the first transmission gear 405 and the second transmission gear 406 is 1:1.

[0121] In the present invention, the bevel gear set is provided to realize the conversion of the power direction, i.e. the gear rotation direction, and further realize the synchronous movement of the first rotating gear 401 and the second rotating gear 407 whose rotation axes are perpendicular to each other driven by a first driving motor 5 at the same time.

[0122] Considering that after the bevel gear set is used to convert the rotation direction, the rotation axis of the second bevel gear 403 and the rotation axis of the second rotating gear 407 are very likely to have a relative offset in the height direction and the horizontal direction; therefore, in the present invention, a group of transmission gears are provided to adjust the axial distance between the second bevel gear 403 and the second rotating gear 407; that is, by providing the first transmission gear 405 and the second transmission gear 406, the axial deviation between the second bevel gear 403 and the second rotating gear 407 in the vertical direction and the horizontal direction is corrected, so as to achieve synchronous rotation of the two. Alternatively, in order to facilitate the size design of the first transmission gear 405 and the second transmission gear 406, the meshing transmission between the first transmission gear 405 and the second transmission gear 406 is replaced by a gear toothed belt transmission mechanism, which belongs to the same technical concept of the present invention.

[0123] In step S4, the synchronous movement method of the first shooting component 2 and the second shooting component 3 is:

[0124] Step S411: the first driving motor 5 drives the first rotating gear 401 to rotate, and the first bevel gear 402 coaxial with the first rotating gear 401 rotates synchronously with the first rotating gear 401; the first bevel gear 40 is meshed with the second bevel gear 403 for transmission, and at the same time drives the coaxial second bevel gear 403 and the first transmission gear 405 to rotate synchronously, and converts the direction of the rotation axis to the horizontal direction; the first transmission gear 405 is meshed with the second transmission gear 406 for transmission, and then can drive the second rotating gear 407 coaxially installed with the second transmission gear 406 to rotate; the first driving motor 5 drives the first rotating gear 401 and the second rotating gear 407 to rotate synchronously;

[0125] Step S412: The first rotating gear 401 is meshed with the arc-shaped rack on the back side of the rotating motion bracket 202 of the second shooting assembly 3, so that the first rotating gear 401 can drive the rotating motion bracket 202 of the second shooting assembly 3 to rotate, so that the lens mounting bracket 203 and the high-speed camera 204 of the second shooting assembly 3 can make circular arc motion around the circumferential direction of the observation container 6;

[0126] The second rotating gear 407 meshes with the arc-shaped rack on the back side of the rotating motion bracket 202 of the first shooting component 2 for transmission, and thus the second rotating gear 407 can drive the rotating motion bracket 202 of the first shooting component 2 to rotate, thereby realizing the circular motion of the lens mounting bracket 203 and the high-speed camera 204 of the first shooting component 2 around the observation container 6 at the top of the observation container 6.

[0127] Wherein, in the step S412, the axis direction of the lens mounting bracket 203 of the first shooting component 2 and the second shooting component 3 always points to the direction of the observation container 6. In the present invention, through the setting of the power distribution component, it is possible to achieve the synchronous operation of two groups of mutually perpendicular first shooting components 2 and second shooting components 3 driven by one driving motor at the same time, thereby achieving the synchronous movement of the two high-speed cameras 204, so that the two high-speed cameras 204 can synchronously observe and record the real-time dispersion state of the fibers in the observation container 6 from the top and the side.

[0128] Compared with the prior art, the technical solution provided by this embodiment has at least one of the following beneficial effects:

[0129] 1. The fiber dispersion test method based on multi-angle image analysis of the present invention can capture the observation container 6 and its internal solution at multiple angles in the circumferential direction and the top direction through the high-speed camera 204 of the first shooting component 2 deflected around the top of the observation container 6 and the high-speed camera 204 of the second shooting component 3 deflected around the side of the observation container 6 during the dispersion of the fibers in the dispersion medium, thereby obtaining a three-dimensional image of the fiber dispersion degree and further analyzing the dispersion performance of the fibers in the dispersion medium.

[0130] 2. The fiber dispersion testing method based on multi-angle image analysis of the present invention compares the dispersion performance of different types of fibers and the same fibers of different lengths in the same dispersion medium by using the same speed and the same dispersion medium; by comparing the time it takes for different fiber types and fibers of different lengths to reach the same dispersion level, the dispersion difficulty of different types of fibers and the dispersion difficulty of the same fibers of different lengths can be obtained, which can guide the selection of related production processes or parameter selection, thereby improving production standards and production efficiency.

[0131] 3. The fiber dispersion test method based on multi-angle image analysis of the present invention uses two sets of shooting components to shoot the state of the observation container 6 and the fiber solution inside it, obtain the state of the chopped fiber strands in the water body, and then determine the degree of fiber dispersion by analyzing the proportion of fibers in the image.

[0132] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A fiber dispersion testing method based on multi-angle image analysis, characterized in that: include: Step S1: preparing a fiber tow to be tested; Step S2: placing the fiber bundle to be tested into an observation container, and injecting a dispersion medium into the observation container; Step S3: placing the observation container into the testing device, and driving the observation container to rotate by the second driving component to achieve dispersion of the fiber tow to be tested; In step S3, the testing device comprises: a first shooting component (2), a second shooting component (3), an observation container (6), a first driving component and a second driving component; the second shooting component (3) has the same structure as the first shooting component (2), and the first shooting component (2) is arranged vertically, while the second shooting component is arranged horizontally; In step S3, the dispersion of the fiber bundles in the observation container (6) is as follows: Step S31: plugging and connecting the central spline shaft (601) at the bottom of the observation container (6) with the rotating spline shaft (701), and plugging and connecting the arc-shaped plug-in portion (602) at the bottom of the observation container (6) with the positioning plate (706); Step S32: the second driving assembly comprises: a planetary gear system and a second driving motor (8), the planetary gear system comprises: a sun gear (704), a planetary gear (705) and an inner ring gear (702), the second driving motor (8) drives the sun gear (704) of the planetary gear system to rotate; the sun gear (704) and the planetary gear (705) are meshed and driven, and then the inner ring gear (702) and the sun gear (704) are driven to rotate in the opposite direction through the planetary gear (705); Step S33: the rotating spline shaft (701) is fixedly connected to the sun gear (704) of the planetary gear train, and the rotating drive disk (703) is fixedly connected to the inner ring gear (702) of the planetary gear train; the inner ring gear (702) and the sun gear (704) rotate in opposite directions, driving the central spline shaft (601) and the observation container (6) to rotate in opposite directions; Step S34: the central spline shaft (601) is fixedly connected to a disturbance component (603) rotatably mounted inside the observation container (6); the disturbance component (603) and the observation container (6) rotate in opposite directions, causing the disturbance component (603) to stir the liquid in the observation container (6) to disperse the fiber bundles; Step S4: the first driving component drives the first shooting component and the second shooting component to move, and the first shooting component and the second shooting component observe the container and the liquid inside the container to take multi-angle shots to obtain the dispersion information of the fiber; The first shooting component (2) drives the high-speed camera (204) to move in the following manner: Step S41: the first shooting assembly (2) comprises: an arc-shaped positioning rail (201), a rotating motion bracket (202), a lens mounting bracket (203) and a high-speed camera (204); the rotating motion bracket (202) is nested and mounted on the outer side of the arc-shaped positioning rail (201), and the two can slide relative to each other; the first driving assembly drives the arc-shaped rack on the outer side of the rotating motion bracket (202) to rotate via the second rotating gear (407); Step S42: the lens mounting bracket (203) is fixedly mounted on the rotating motion bracket (202), and the high-speed camera (204) is fixedly mounted on the end thereof; during the rotation of the arc-shaped rack, the rotating motion bracket (202) rotates around its own axis, and at the same time drives the lens mounting bracket (203) to rotate around the observation container (6); Step S43: The lens mounting bracket (203) drives the high-speed camera (204) to rotate synchronously, so as to realize the arc movement of the high-speed camera (204) and the high-speed camera (204) is always aligned with the observation container (6).

2. The fiber dispersion testing method based on multi-angle image analysis according to claim 1 is characterized in that: In the step S1, the chopped fiber bundle is dyed.

3. The fiber dispersion testing method based on multi-angle image analysis according to claim 1 or 2, characterized in that: In step S3, a lighting device is installed inside the testing device to achieve independent lighting.

4. The fiber dispersion testing method based on multi-angle image analysis according to claim 2 is characterized in that: In step S3, when the observation container (6) rotates, it can drive the liquid in the observation container (6) to rotate; when the liquid rotates, it moves from the center of the observation container (6) toward the wall of the observation container (6) under the action of centrifugal force, and at the same time, multiple vortices are generated under the guidance of multiple arc-shaped guide plates (604), so that laminar flow and vortex occur in the liquid in the observation container (6).

5. The fiber dispersion testing method based on multi-angle image analysis according to claim 3 is characterized in that: In the step S3, the observation container (6) is arranged below the first shooting component (2); the second shooting component (3) is in an arc shape as a whole, and the observation container (6) and the second shooting component (3) are arranged coaxially.

6. The fiber dispersion testing method based on multi-angle image analysis according to claim 1, characterized in that: In the step S4, when the high-speed camera (204) of the second shooting component (3) is displaced, the high-speed camera (204) moves in a circumferential direction of the observation container (6), and the distance between the high-speed camera (204) and the observation container (6) remains unchanged.

7. The fiber dispersion testing method based on multi-angle image analysis according to claim 1, characterized in that: In step S3, a heating component is also provided inside the testing device, and the temperature of the observation container (6) is controlled by the heating component, so that the dispersion of the fiber at different temperatures can be tested.

Images