A fiber dispersion test method based on fiber suspension observation

Abstract

The present invention relates to a fiber dispersion test method based on fiber suspension observation, belongs to the technical field of fiber dispersion test, and solves the problem that there is no unified standard for the current fiber dispersion test. The present invention comprises the following steps: step S1: preparing chopped fiber bundles; step S2: placing the chopped fiber bundles into a dispersion cup filled with liquid; step S3: placing the dispersion cup into a testing device; starting the testing device, preparing a fiber suspension, and simultaneously performing image acquisition of the fiber suspension through an image acquisition mechanism inside the testing device; step S4: analyzing the image information collected in the step S3, and performing grade assessment on the fiber dispersion. The present invention realizes a standardized dispersion process and dispersion comparison of different fibers by rapidly rotating and dispersing the chopped fiber bundles, observing the fiber dispersion state in real time, and acquiring image information of the fiber suspension.

Description

Technical Field

[0001] The invention relates to the technical field of fiber dispersion, and in particular to a fiber dispersion testing method based on fiber suspension observation. Background Art

[0002] Fiber materials are 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 properties, the manufacture of composite fibers and the application of fibers in composite materials.

[0003] The uniform dispersion of fibers in water is conducive to the uniform mixing of fibers and is an important indicator for the preparation of fiber composite materials. Adding fibers to material slurry after chopped fibers can improve material properties, and the dispersion of fibers affects the improvement effect on material properties.

[0004] Characterization and evaluation of the dispersion degree 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 mixing degree.

[0005] 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

[0006] In view of the above analysis, the present invention aims to provide a fiber dispersion test method based on fiber suspension observation to solve the problem of poor consistency of existing fiber dispersion tests.

[0007] The purpose of the present invention is mainly achieved through the following technical solutions:

[0008] A fiber dispersion test method based on fiber suspension observation, comprising:

[0009] Step S1: preparing chopped fiber tow;

[0010] Step S2: placing the chopped fiber bundle into a dispersion cup filled with liquid; placing the dispersion cup into the testing device;

[0011] Step S3: starting the test device, driving the image acquisition mechanism to move through the driving device, and driving the rotating disk inside the dispersion cup to move synchronously through the transmission component; the rotating disk rotates to prepare the fiber suspension, and the camera of the image acquisition mechanism acquires an image of the fiber suspension;

[0012] Step S4: Analyze the image information collected in step S3 and grade the fiber dispersion.

[0013] Furthermore, in the step S1, the chopped fiber bundles are divided into a plurality of groups according to their lengths, and the plurality of groups of chopped fiber bundles have different lengths but the same number.

[0014] Furthermore, in step S1, the length types of the plurality of groups of chopped fiber bundles include: 1 mm, 2 mm, 4 mm and 6 mm.

[0015] Furthermore, in the step S1, the chopped fiber bundle is dyed.

[0016] Furthermore, in the step S1, the dyed chopped fiber bundle is red, green or yellow.

[0017] Further, in step S3, the performance testing device comprises: an image acquisition mechanism, a driving device and a dispersion cup; the driving device is used to drive the image acquisition mechanism and the dispersion cup to move; the image acquisition mechanism comprises: a first motion mechanism and a second motion mechanism; the first motion mechanism and the second motion mechanism have the same structural composition and motion principle, and are arranged perpendicular to each other; cameras are installed in both the first motion mechanism and the second motion mechanism, and the first motion mechanism and the second motion mechanism can drive the two cameras to move in an arc around the dispersion cup; the driving device can drive the rotating disk inside the dispersion cup to rotate through the transmission assembly, thereby realizing the dispersion of the fibers inside it; the camera can take multi-angle images of the dispersion cup.

[0018] Further, in step S3, the first motion mechanism includes: a semicircular base, a semicircular rotating frame, a rotating bracket and a first rotating shaft; two rotating brackets are rotatably mounted on both ends of the semicircular rotating frame through ball joints, and are symmetrically arranged about the plane where the semicircular rotating frame is located; the two rotating brackets are rotatably connected to the semicircular base through two first rotating shafts;

[0019] The step S3 comprises:

[0020] Step S301: the driving device drives the first rotating shaft to rotate, and the two rotating brackets rotate synchronously;

[0021] Step S302: The axes where the two hinge points of the semicircular rotating frame and the two rotating brackets are located rotate around the center of the semicircular base, and the rotation trajectory is a double conical surface;

[0022] Step S303: the camera fixing rod in the middle of the semicircular rotating frame and the camera synchronize the semicircular rotating frame movement; the upper end of the camera fixing rod slides in the strip groove of the semicircular base, and the axis of the camera fixing rod always points to the center of the semicircular base;

[0023] Step S304: while the camera fixing rod slides in the strip-shaped slot, the camera moves in a curve around the dispersion cup and simultaneously photographs the dispersion cup.

[0024] Furthermore, in step S2, the depth of the liquid in the dispersion cup is no more than 2 / 3 of the overall height of the dispersion cup.

[0025] Furthermore, in step S3, the image information collected from the fiber suspension includes: video information obtained by recording the dispersion process of the chopped fiber bundle in the dispersion cup, and picture information obtained by photographing the state of the chopped fiber bundle after dispersion in the dispersion cup.

[0026] Furthermore, in step S4, by analyzing and comparing the image information of the dispersion state of the chopped fiber bundles of different lengths obtained in step S3, the dispersion difficulty of the chopped fiber bundles of different lengths and the diffusion degree after dispersion can be obtained.

[0027] The technical solution of the present invention can achieve at least one of the following effects:

[0028] 1. The fiber dispersion test method based on fiber suspension observation of the present invention drives the dispersion cup to rotate to realize the rapid dispersion of the chopped fiber bundles inside it in the water body, and the dispersion of the chopped fibers is tested by controlling the rotation speed and rotation time of the dispersion cup. The consistency of the fiber dispersion conditions can be controlled by controlling the power and operation time of the driving device, and the information such as the dispersion speed, dispersion degree, and fiber dispersion state of different types and lengths can be obtained. By analyzing the dispersion performance of the fiber, a performance reference can be provided for the processing, use, and preparation of composite fibers of the fiber, and the method has broad application prospects.

[0029] 2. The fiber dispersion test method based on fiber suspension observation of the present invention adopts dual cameras to collect fiber status information and obtain image information of fiber dispersion. The two cameras move under the drive of two sets of motion mechanisms. The first motion mechanism and the second motion mechanism can move synchronously under the drive of the driving device. When the first rotating axes of the two sets of motion mechanisms rotate, they can drive the semicircular rotating frame to deflect left and right, thereby realizing the sliding movement of the two cameras along the two semicircular bases, realizing real-time multi-angle image capture of the dispersion cup and the liquid inside it, and obtaining all-round, timely and accurate status information of the fiber dispersion process.

[0030] 3. The fiber dispersion test method based on fiber suspension observation of the present invention links the movement of the motion mechanism and the rotational movement of the dispersion cup by setting a transmission component, so that the two can move synchronously, and at the same time, the movement speed of the camera and the rotation speed of the dispersion cup can be controlled by reasonably setting the transmission ratio, thereby realizing the simultaneous collection of multi-angle information on fiber dispersion and dispersion status, and saving test time.

[0031] 4. The fiber dispersion test method based on fiber suspension observation of the present invention promotes fiber dispersion by driving the rotating disk in the dispersion cup to rotate. When the rotating disk rotates, it can drive the water body to move. When the water body moves, it will be guided by the arc guide plate, so that the water body can undergo various complex movements in the dispersion cup, so that the fibers are quickly dispersed, and when the camera observes from the side, the arc guide plate can serve as a background plate to provide contrast for fiber observation.

[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 fiber suspension observation of the present invention;

[0035] Figure 2 A schematic diagram of a testing device for implementing the testing method of the present invention;

[0036] Figure 3 An image acquisition mechanism for the fiber dispersion test method based on fiber suspension observation of the present invention;

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

[0038] Figure 5 is a schematic diagram of the structural composition of the first motion mechanism;

[0039] Figure 6 It is a schematic diagram of the left-biased state of the camera of the first motion mechanism;

[0040] Figure 7 It is a schematic diagram of the camera right-biased state of the first motion mechanism;

[0041] Figure 8 It is a schematic diagram of the connection state of the semicircular rotating frame, the camera fixing rod and the rolling shaft sleeve;

[0042] Fig. 9 It is a schematic diagram of the connection state of the semicircular rotating frame and the camera fixing rod;

[0043] Fig.10 It is a structural schematic diagram of a semicircular base;

[0044] Fig.11 It is a schematic diagram of the internal structure of the dispersion cup;

[0045] Fig.12 Schematic diagram of the bottom structure of the dispersion cup;

[0046] Fig.13 Schematic diagram of the top view of the dispersion cup;

[0047] Fig.14 It is a schematic diagram of the rotating disk structure;

[0048] Fig.15 Schematic diagram of the structure of the drive component.

[0049] Reference numerals:

[0050] 1-first motion mechanism; 2-second motion mechanism; 3-first gear; 4-second gear; 5-driving device; 6-dispersing cup; 7-driving assembly; 8-equipment housing; 9-motor mounting support; 10-mechanism mounting support; 11-gear toothed belt mechanism; 12-transmission shaft; 13-first bevel gear; 14-second bevel gear; 15-dispersing cup fixing support;

[0051] 101-semicircular base; 102-semicircular rotating frame; 103-strip slot; 104-camera fixing rod; 105-camera; 106-rolling sleeve; 107-rotating bracket; 108-first rotating axis; 109-second rotating axis; 501-driving gear; 601-spline shaft; 602-arc positioning block; 603-rotating disk; 604-convex ridge; 605-arc guide plate; 606-comb tooth structure; 701-rotating driving shaft; 702-spline groove; 703-positioning disk; 704-positioning groove. DETAILED DESCRIPTION

[0052] 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.

[0053] Example 1

[0054] A specific embodiment of the present invention discloses a fiber dispersion test method based on fiber suspension observation, such as Figure 1 As shown, including:

[0055] Step S1: preparing chopped fiber tow;

[0056] Step S2: placing the chopped fiber bundle into a dispersion cup filled with liquid; placing the dispersion cup into a testing device;

[0057] Step S3: Start the test device, drive the image acquisition mechanism to move through the driving device 5, and drive the rotating disk 603 inside the dispersion cup 6 to move synchronously through the transmission component; the rotating disk 603 rotates to prepare the fiber suspension, and the camera 105 of the image acquisition mechanism acquires an image of the fiber suspension;

[0058] Step S4: Analyze the image information collected in step S3 and grade the fiber dispersion.

[0059] In the step S1, the chopped fiber bundles are divided into a plurality of groups according to their lengths, and the plurality of groups of chopped fiber bundles have different lengths but the same number.

[0060] In the step S1, the length types of the plurality of groups of chopped fiber bundles include: 1 mm, 2 mm, 4 mm and 6 mm.

[0061] In the step S1, the chopped fiber bundle is dyed.

[0062] In the step S1, the dyed chopped fiber bundle is red, green or yellow.

[0063] In the step S2, the property testing device comprises: an image acquisition mechanism, a driving device 5 and a dispersion cup 6; the driving device 5 is used to drive the image acquisition mechanism and the dispersion cup 6 to move; the image acquisition mechanism comprises: a first motion mechanism 1 and a second motion mechanism 2; the first motion mechanism 1 and the second motion mechanism 2 have the same structural composition and motion principle, and are arranged perpendicular to each other; cameras 105 are installed in both the first motion mechanism 1 and the second motion mechanism 2, and the first motion mechanism 1 and the second motion mechanism 2 can be distributed to drive the two cameras 105 to move in an arc around the dispersion cup 6; the driving device 5 can drive the rotating disk 603 inside the dispersion cup 6 to rotate through the transmission component, thereby realizing the dispersion of the fibers inside it; the camera 105 can take multi-angle images of the dispersion cup 6.

[0064] In the step S2 , the depth of the liquid in the dispersion cup 6 is no more than 2 / 3 of the overall height of the dispersion cup 6 .

[0065] In the step S2, the dispersion cup 6 and the driving assembly 7 of the testing device are connected by plugging, and the driving assembly 7 is driven to rotate by the transmission assembly.

[0066] Specifically, Fig.15 As shown, the driving assembly 7 includes: a rotating driving shaft 701 and a positioning plate 703; wherein the positioning plate 703 is an annular disc; the rotating driving shaft 701 is rotatably mounted inside the positioning plate 703 through a bearing; a spline groove 702 is provided on the upper end surface of the rotating driving shaft 701, and a positioning groove 704 is provided on the upper end surface of the positioning plate 703. Correspondingly, as Fig.11 As shown, a spline shaft 601 and an arc-shaped positioning block 602 are arranged on the bottom surface of the dispersion cup 6. The spline shaft 601 is plug-connected with the spline groove 702, and the positioning groove 704 is plug-connected with the arc-shaped positioning block 602.

[0067] Specifically, Figure 2 As shown, a dispersion cup fixing support 15 is provided inside the equipment housing 8, and the driving disk 703 of the driving assembly 7 is fixedly connected to the dispersion cup fixing support 15. The dispersion cup 6 is detachably connected to the driving assembly 7, so that the dispersion cup 6 can be placed in or taken out of the test device, which is convenient for replacing test materials or performing multiple tests.

[0068] Specifically, the spline shaft 601 and the rotating disk 603 inside the dispersion cup 6 are fixedly connected through a rotating shaft assembly, so that the spline shaft 601 and the rotating disk 603 can rotate synchronously; specifically, the rotating shaft assembly includes a rotating shaft, a bearing and a sealing gasket; wherein the upper end of the rotating shaft is fixedly connected to the rotating disk 603, and the bearing is arranged between the rotating shaft and the bottom plate of the dispersion cup 6, so as to realize the rotation of the rotating disk 603 relative to the main body of the dispersion cup 6; the lower surface of the rotating disk 603 is in contact with the bottom surface of the inner wall of the dispersion cup 6, and the two realize rotational sealing through a sealing gasket.

[0069] Specifically, in step S3, the driving device 5 outputs a rotational motion with the rotation axis in the horizontal direction, such as Figure 2 Preferably, the driving device 5 is a rotary motor capable of outputting a rotary motion.

[0070] In a specific implementation of the present invention, the transmission assembly includes: a gear belt mechanism 11, a transmission shaft 12, and a bevel gear set; the gear belt mechanism is connected between the motor output shaft 501 of the driving device 5 and the transmission shaft 12, and is used to drive the transmission shaft 12 to rotate; the transmission shaft 12 is horizontally arranged, and the end is connected to a bevel gear set; the bevel gear set can convert the horizontal rotational motion of the transmission shaft into the vertical rotational motion, thereby driving the rotating disk 603 of the dispersion cup 6 to rotate. During implementation, the gear belt mechanism can also be replaced by a belt transmission mechanism or a gear set meshing transmission, which belongs to the technical concept of the present invention and falls within the protection scope of the present invention.

[0071] Furthermore, the bevel gear set includes a first bevel gear 13 and a second bevel gear 14 that mesh with each other; the first bevel gear 13 is fixedly connected to the transmission shaft 12, and the second bevel gear 14 is fixedly connected to the rotating drive shaft 701 of the driving assembly 7; the rotating drive shaft 701 is used to drive the rotating disk 603 in the dispersion cup 6 to rotate.

[0072] In step S3, the fiber dispersion process in the dispersion cup 6 is as follows:

[0073] Step S31: A rotating disk 603 is rotatably mounted at the bottom of the dispersion cup 6; a plurality of ridges 604 are arranged on the surface of the rotating disk 603; when the rotating disk 603 rotates, the liquid in the dispersion cup 6 can be disturbed. Specifically, when the rotating disk 603 rotates, the liquid inside the dispersion cup 6 can be driven to rotate and flow toward the edge of the dispersion cup 6 under the action of centrifugal force, so that the internal liquid can rotate and flow along the inner wall surface of the dispersion cup 6.

[0074] Step S32: A plurality of arc-shaped guide plates 605 are provided on the inner wall of the dispersion cup 6, and the arc-shaped guide plates 605 can guide the liquid in the dispersion cup 6 to rotate and flow along the arc extension direction of the arc-shaped guide plates 605. During implementation, when the liquid rotates and flows along the inner wall surface of the dispersion cup 6, the liquid rotates and flows along the arc-shaped guide plates 605 under the action of the arc-shaped guide plates 605. Since a plurality of arc-shaped guide plates 605 are provided, the liquid forms a plurality of vortices inside the dispersion cup 6, thereby promoting the rapid dispersion of the fibers in the dispersion cup 6.

[0075] Step S33: A plurality of rectangular grooves are provided on the edge of the arc-shaped guide plate 605 so that a comb-tooth structure 606 is formed on its edge; when the liquid flows along the arc-shaped guide plate 605, it can be diverted by the comb-tooth structure, so that part of the liquid moves toward the center of the dispersion cup 6 under the action of inertia, and part of the liquid flows along the rectangular grooves of the comb-tooth structure 606 toward the back side of the arc-shaped guide plate 605, thereby realizing multiple movement states of the liquid, and further realizing rapid and uniform dispersion of the chopped fiber bundles in the dispersion cup 6.

[0076] Preferably, in order to prevent the liquid from spilling, the upper end of the dispersion cup 6 is screwed with a transparent cup cap by threading. Alternatively, the height of the liquid in the dispersion cup 6 is 0.5-0.8 of the overall height of the dispersion cup 6, and the rotation speed of the rotating disk 603 is controlled not to be too fast.

[0077] Specifically, in step S3, after the driving device 5 drives the rotating disk 603 to rotate at a first constant speed for 1 minute, the driving device 5 switches to a second speed to drive the rotating disk 603 to rotate, and the rotating disk 603 continues to rotate at the second speed for 1 minute.

[0078] In a specific implementation manner of the present invention, the first speed is 60 rpm and the second speed is 10 rpm.

[0079] Specifically, when the rotating disk 603 rotates at a first speed, the two cameras 105 record the dispersion cup 6 and the liquid therein; when the rotating disk 603 rotates at a second speed, the two cameras 105 take photos of the dispersion cup 6 and the liquid therein. Specifically, the cameras 105 are controlled to take photos of the dispersion cup 6 and the fiber solution therein at the left extreme position, the middle position, and the right extreme position. In the present invention, the middle position, i.e., the position where the camera 105 is located when the camera fixing rod 104 is located in the middle of the semicircular base 101, is Figure 5 As shown; the left limit position is the maximum angle position of the camera 105 deflected to the left under the drive device 5, that is, the rotating bracket 107 is in a vertical state and the left rotating bracket 107 is lower than the right rotating bracket; the right limit position is the maximum angle position of the camera 105 deflected to the right under the drive device 5, that is, the rotating bracket 107 is in a vertical state and the left rotating bracket 107 is higher than the right rotating bracket; as shown Figure 6 , Figure 7 shown.

[0080] Further, in step S3, if Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the first motion mechanism 1 includes: a semicircular base 101, a semicircular rotating frame 102, a rotating bracket 107, a camera fixing rod 104 and a camera 105; the two ends of the semicircular rotating frame 102 are respectively connected to one end of the two rotating brackets 107 through a ball joint, and the other end of the rotating bracket 107 is rotatably connected to the semicircular base 101; the camera fixing rod 104 is fixedly installed in the middle of the semicircular rotating frame 102, and the axis of the camera fixing rod 104 points to the center of the semicircular rotating frame 102; the upper end of the camera fixing rod 104 is slidably installed in the strip groove 103 of the semicircular base 101, and the camera 105 is fixedly installed at the lower end; when the driving device 5 drives the rotating bracket 107 to rotate relative to the semicircular base 101, it can drive the camera fixing rod 104 to slide in the strip groove 103, and at the same time realize the rotation of the camera 105 around the center of the semicircular base 101.

[0081] like Figure 5 , Figure 6 , Figure 7 As shown, the motion mechanism of the present invention can realize the reciprocating deflection motion of the camera 105 with the center of the semicircular base 101 as the center.

[0082] Specifically, in the present invention, a driving gear 501 is fixedly installed at the end of the driving device 5, and the driving gear 501 is meshed with the first gear 3 and the second gear 4 for transmission at the same time; the first gear 3 and the second gear 4 rotate synchronously driven by the driving gear 501; and the first gear 3 is fixedly connected to the first rotating shaft 108 of the first motion mechanism 1, and the second gear 4 is fixedly connected to the first rotating shaft 108 of the second motion mechanism 2; during implementation, the driving device 5 can rotate through the driving gear 501, the first gear 3 / the second gear 4 and the rotating bracket 107 that drives the first motion mechanism 1 / the second motion mechanism 2, thereby realizing the movement of the two groups of semicircular rotating frames 102 and the camera 105.

[0083] Specifically, Figure 2 As shown, a motor mounting support 9 and two mechanism mounting supports 10 are provided inside the device housing 8, wherein the motor mounting support 9 is used to fix the drive device 5, and the two mechanism mounting supports 10 are used to fix the first motion mechanism 1 and the second motion mechanism 2.

[0084] like Figure 5 , Figure 6 , Figure 7 As shown, the arc radius of the semicircular rotating frame 102 is smaller than the arc radius of the semicircular base 101 .

[0085] like Figure 8 As shown, two second rotation axes 109 are integrally provided at both ends of the semicircular rotating frame 102; the two second rotation axes 109 are located on the same axis and the axes of the second rotation axes 109 pass through the center of the semicircular rotating frame 102. The camera fixing rod 104 is fixedly installed in the middle of the semicircular rotating frame 102, and the camera fixing rod 104 is perpendicular to the axes of the second rotation axes 109 and points to the center of the semicircular rotating frame 102.

[0086] Furthermore, the second rotating shaft 109 is connected to the first end of the rotating bracket 107 through a ball joint, and the two rotating brackets 107 are centrally symmetrically arranged on both sides of the semicircular rotating frame 102. Specifically, in order to realize the deflection movement of the semicircular rotating frame 102 relative to the semicircular base 101, the present invention provides a rolling sleeve 106 or a ball head structure in contact with the side of the strip slot 103.

[0087] For example, Figure 8As shown, the upper end of the camera fixing rod 104 is connected to the rolling sleeve 106 through a ball joint; the rolling sleeve 106 is cylindrical, and its outer arc surface is tangent to the side wall of the strip groove 103; the semicircular rotating frame 102 rolls or slides along the front and rear sides of the strip groove 103, and the ball joint structure can realize multi-degree-of-freedom torsion of the rolling sleeve 106 and the semicircular rotating frame 102 to compensate for the angle difference between the semicircular rotating frame 102 and the semicircular base 101. Or, as Fig. 9 As shown, a ball head structure is fixedly provided at the upper end of the camera fixing rod 104; the ball head structure is spherical, and the arc surface of the ball head structure is in point contact with the side wall surface of the strip-shaped slot 103. The present invention can realize relative torsional movement between the semicircular rotating frame 102 and the semicircular base 101 by providing an articulated rolling sleeve 106 or a ball head structure.

[0088] like Fig.10 As shown, a strip groove 103 is opened inside the semicircular base 101 , and the strip groove 103 is arranged parallel to the transverse symmetry plane of the semicircular base 101 and symmetrical with respect to the longitudinal symmetry plane of the semicircular base 101 .

[0089] Specifically, the front side surface and the rear side surface of the strip-shaped slot 103 are both parallel to the transverse symmetry plane of the semicircular base 101 .

[0090] Furthermore, the second end of the rotating bracket 107 is rotatably connected to the semicircular base 101 through the first rotating shaft 108, and the axes of the two first rotating shafts 108 are collinear; the axes of the two second rotating shafts 109 on both sides of the semicircular rotating frame 102 are collinear, and the intersection of the axis of the first rotating shaft 108 and the axis of the second rotating shaft 109 coincides with the center of the semicircular rotating frame 102.

[0091] When implementing, Figure 6 , Figure 7 As shown, the intersection of the connection axis between the two rotating brackets 107 and the two hinge points of the semicircular rotating frame 102 and the axis of the two first rotating shafts 108 always coincides with the center of the semicircular base 101 .

[0092] In step S3, the motion mode of the first motion mechanism 2 is:

[0093] Step S301: The first motion mechanism 2 includes: a semicircular base 1, a semicircular rotating frame 102, a rotating bracket 107 and a first rotating shaft 108; two rotating brackets 107 are rotatably mounted at both ends of the semicircular rotating frame 102 through ball joints, and are symmetrically arranged about the plane where the semicircular rotating frame 102 is located; the two rotating brackets 107 are rotatably connected to the semicircular base 101 through two first rotating shafts 108; when the driving device 7 drives the first rotating shaft 108 to rotate, the two rotating brackets 107 rotate synchronously;

[0094] Step S302: The axes where the two hinge points of the semicircular rotating frame 102 and the two rotating brackets 107 are located rotate around the center of the semicircular base 101, and the rotation trajectory is a double conical surface;

[0095] Step S303: A camera fixing rod 104 and a camera 105 are fixedly installed in the middle of the semicircular rotating frame 102; the upper end of the camera fixing rod 104 is slidably installed in the strip groove 103 of the semicircular base 101, and when the rotating bracket 107 rotates, the end of the camera fixing rod 104 slides in the strip groove 103, and the axis of the camera fixing rod 104 always points to the center of the semicircular base 101;

[0096] Specifically, when the rotating bracket 107 rotates, it can drive the semicircular rotating frame 102 to deflect. Since the camera fixing rod 104 at the upper end of the semicircular rotating frame 102 is restricted by the strip groove 103, the semicircular rotating frame 102 compensates for the rotation angle through the ball joint structure, and the end of the camera fixing rod 104 cooperates with the strip groove 103 through a hinged rolling sleeve 106 or a fixedly installed ball head structure, so that the camera fixing rod 104 swings left and right around the center of the semicircular base 101, so that the rolling sleeve 106 / ball head structure at the upper end of the camera fixing rod 104 can slide left and right along the strip groove 103, thereby realizing the left and right reciprocating deflection movement of the camera 105.

[0097] Step S304 : when the camera fixing rod 103 slides in the strip-shaped slot 103 , the camera 105 makes a curved motion and simultaneously photographs the dispersion cup 6 .

[0098] In step S3, Figure 2 , Figure 3 , Figure 4 As shown, in the present invention, two sets of mutually perpendicular motion mechanisms are used to observe and collect image information of the dispersion cup 6 and the liquid and fibers therein from above and on the side of the dispersion cup 6, so as to obtain status information of the fiber dispersion process and information such as the degree of dispersion after the fiber dispersion is completed.

[0099] In the step S3, the image information collected from the fiber suspension includes: video information obtained by recording the dispersion process of the chopped fiber bundle in the dispersion cup 6, and picture information obtained by photographing the state of the chopped fiber bundle after dispersion in the dispersion cup 6.

[0100] In step S4, by analyzing and comparing the image information of the dispersion state of the chopped fiber bundles of different lengths obtained in step S3, the dispersion difficulty of the chopped fiber bundles of different lengths and the diffusion degree after dispersion can be obtained.

[0101] Specifically, in step S4, the ratio of the fiber color (e.g., red) and the background color (black) in the image is calculated by image processing software to obtain the degree of dispersion of the fiber in the liquid; and then the dispersion of the fiber can be graded according to the dispersion performance (dispersion efficiency and dispersion degree) of the fiber.

[0102] In the present invention, the camera 105 used for taking pictures of the dispersion cup 6 and the solution therein is a high-speed motion camera, which can take pictures of objects in motion.

[0103] Specifically, the first motion mechanism 1, the second motion mechanism 2 and the dispersion cup 6 of the fast discrete fiber dispersion test device of the present invention are all arranged inside the device housing 8. Preferably, the device housing 8 is made of aluminum alloy to achieve stability and lightness of its overall structure.

[0104] In step S4, in order to achieve a better shooting effect, the interior of the device housing 8 is entirely sprayed with black paint, so that the device housing 8 has a light-shielding effect on its internal structure.

[0105] In a specific implementation of the present invention, a lighting device is disposed inside the device housing 8; the lighting device is an LED light strip or a point light source lighting lamp.

[0106] In step S4, a plurality of reflectors are arranged inside the device housing 8, and a plurality of reflectors are arranged at equal intervals along the circumferential direction of the dispersion cup 6 and are arranged at an angle; the reflectors can reflect the light emitted by the lighting device to the dispersion cup 6, so as to achieve uniform illumination of the dispersion cup 6.

[0107] Specifically, the lighting device is arranged on the side facing away from the second motion mechanism 2, that is, the lighting device is arranged on the outside of the second motion mechanism 2 and behind the camera 105 to prevent the light source from directly hitting the lens and causing the lens to be unable to collect image information.

[0108] In order to realize the observation of the dispersion cup 6 and the liquid inside it from the top view angle and the side view angle, as well as the multi-angle observation of the circumferential direction of the dispersion cup 6; in the present invention, the observation cup 6 is arranged below the center of the semicircular base 101 of the first motion mechanism 1, and is located at the center of the semicircular base 101 of the second motion mechanism. That is, the central axis of the dispersion cup 6 passes through the center of the semicircular first motion mechanism 1 and the second motion mechanism 2. In the present invention, the driving device 5 can drive the dispersion cup 6 to rotate through the transmission assembly, thereby realizing the dispersion of the internal fibers; the camera 105 can take multi-angle images of the dispersion cup 6.

[0109] Compared with the prior art, the technical solution provided by this embodiment includes at least one of the following beneficial effects:

[0110] 1. In the fiber dispersion testing method of the present invention, the driving device 5 drives the camera 105 to move through two sets of motion mechanisms, and at the same time drives the dispersion cup 6 to rotate through the transmission component, so as to observe the dispersion cup 6 from the top and side thereof, and obtain the status information of the liquid and chopped fibers in the dispersion cup 6, thereby realizing real-time observation of the fiber dispersion.

[0111] 2. The fiber dispersion test method of the present invention, by adopting a dispersion cup 6 with a rotating disk 603 and an arc-shaped guide plate 605, can achieve disturbance of the liquid in the dispersion cup 6, so that the liquid in the dispersion cup 6 has continuous movement in multiple flow directions, thereby being able to achieve rapid dispersion of short-cut fiber filaments. Compared with the manual stirring method, the dispersion efficiency is improved, the time required for testing the fiber dispersion is shortened, and the experimental efficiency is improved.

[0112] 3. The fiber dispersion testing method of the present invention can realize the motion drive of the first motion mechanism 1, the second motion mechanism 2 and the dispersion cup 6 only through a single driving device 5, so that the dispersion testing device of the present invention has a low cost, a simple driving method, and no complicated operation is required, which saves the operating difficulty and working time of the experimental personnel; it can obtain the strength of the dispersion of different types of fiber bundles and fiber bundles of different lengths, as well as the degree of dispersion more quickly and accurately; the image information (photos / videos) obtained by the camera 105 can be stored in the form of electronic data, which is convenient for calling or comparing. Compared with the existing manual stirring test method, the experimental information is easier to store, share and save; it provides a reliable reference indicator for guiding fiber dispersion operations or the preparation of composite fiber materials.

[0113] 4. The fiber dispersion test method of the present invention can avoid the influence of the external environment state (light changes, projection) on the observation results by providing a closed device housing 8, painting the inside of the device black, and evenly illuminating the dispersion cup 6 through a lighting device.

[0114] 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 test method based on fiber suspension observation, characterized in that: include: Step S1: preparing chopped fiber tow; Step S2: placing the chopped fiber bundle into a dispersion cup (6) filled with liquid; Place the dispersion cup (6) into the testing device; Step S3: starting the testing device, driving the image acquisition mechanism to move through the driving device (5), and at the same time driving the rotating disk (603) inside the dispersion cup (6) to move synchronously through the transmission component; the rotating disk (603) rotates to prepare the fiber suspension, and at the same time the camera (105) of the image acquisition mechanism acquires an image of the fiber suspension; Step S4: analyzing the image information collected in step S3 and evaluating the fiber dispersion; In step S3, the testing device comprises: an image acquisition mechanism, a driving device (5) and a dispersion cup (6); the driving device (5) is used to drive the image acquisition mechanism and the dispersion cup (6) to move; the image acquisition mechanism comprises: a first motion mechanism (1) and a second motion mechanism (2); the first motion mechanism (1) and the second motion mechanism (2) have the same structural composition and motion principle, and are arranged perpendicular to each other; cameras (105) are installed in both the first motion mechanism (1) and the second motion mechanism (2), and the first motion mechanism (1) and the second motion mechanism (2) can drive the two cameras (105) to move in an arc around the dispersion cup (6); the driving device (5) can drive the rotating disk (603) inside the dispersion cup (6) to rotate through the transmission component, thereby achieving dispersion of the fibers inside the dispersion cup; the camera (105) can take multi-angle images of the dispersion cup (6); The first motion mechanism (1) comprises: a semicircular base (101), a semicircular rotating frame (102), a rotating bracket (107) and a first rotating shaft (108); two rotating brackets (107) are rotatably mounted on two ends of the semicircular rotating frame (102) via ball joints and are symmetrically arranged about the plane where the semicircular rotating frame (102) is located; the two rotating brackets (107) are rotatably connected to the semicircular base (101) via two first rotating shafts (108); The step S3 comprises: Step S301: the driving device (5) drives the first rotating shaft (108) to rotate, and the two rotating brackets (107) rotate synchronously; Step S302: The axes of the two hinge points of the semicircular rotating frame (102) and the two rotating brackets (107) rotate around the center of the semicircular base (101), and the rotation trajectory is a double conical surface; Step S303: the camera fixing rod (104) and the camera (105) in the middle of the semicircular rotating frame (102) move synchronously with the semicircular rotating frame (102); the upper end of the camera fixing rod (104) slides in the strip-shaped slot (103) of the semicircular base (101), and the axis of the camera fixing rod (104) always points to the center of the semicircular base (101); Step S304: while the camera fixing rod (104) slides in the strip-shaped slot (103), the camera (105) moves in a curve around the dispersion cup (6) and simultaneously photographs the dispersion cup (6).

2. The fiber dispersion test method based on fiber suspension observation according to claim 1 is characterized in that: In the step S1, the chopped fiber bundles are divided into a plurality of groups according to their lengths, and the plurality of groups of chopped fiber bundles have different lengths but the same number.

3. The fiber dispersion test method based on fiber suspension observation according to claim 2 is characterized in that: In the step S1, the length types of the plurality of groups of chopped fiber bundles include: 1 mm, 2 mm, 4 mm and 6 mm.

4. The fiber dispersion test method based on fiber suspension observation according to claim 3 is characterized in that: In the step S1, the chopped fiber bundle is dyed.

5. The fiber dispersion test method based on fiber suspension observation according to claim 4 is characterized in that: In the step S1, the dyed chopped fiber bundle is red, green or yellow.

6. The fiber dispersion test method based on fiber suspension observation according to claim 1, characterized in that: In the step S2, the depth of the liquid in the dispersion cup (6) is no more than 2 / 3 of the overall height of the dispersion cup (6).

7. The fiber dispersion testing method based on fiber suspension observation according to claim 1 is characterized in that: In the step S3, the image information collected from the fiber suspension includes: video information obtained by recording the dispersion process of the chopped fiber bundle in the dispersion cup (6), and picture information obtained by photographing the state of the chopped fiber bundle after dispersion in the dispersion cup (6).

8. The fiber dispersion test method based on fiber suspension observation according to claim 1, characterized in that: In step S4, the image information of the dispersion state of the chopped fiber bundles of different lengths obtained in step S3 is analyzed and compared to obtain the dispersion difficulty and diffusion degree of the chopped fiber bundles of different lengths.

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