A method and device for observing droplet evolution characteristics under dynamic constraint of fiber bundle

Abstract

The application discloses a kind of observation method and device of droplet evolution characteristics under the dynamic constraint of fiber bundle.The rotating plate is hinged to the object table at one end, and the other end is fixed with a syringe propulsion mechanism through a lifting mechanism support and a lifting mechanism.The output end of the electric control elevator is hinged to the bottom of the rotating plate.Both the rotating plate and the lifting mechanism support are fixed with positive and negative tooth guide rail sliding table modules.Two L-shaped plates connected by one of the positive and negative tooth guide rail sliding table modules are both fixed with U-shaped plates.Two L-shaped plates connected by the other positive and negative tooth guide rail sliding table module are both fixed with T-shaped plates.The application can accurately, conveniently and multi-conditionally match the wetting performance detection of droplets on different state fiber bundles to complete the wetting research and experiment of super-hydrophobic materials such as carbon fiber.The application can observe the dynamic spreading evolution characteristics of magnetic nanodroplets on two carbon fiber bundles from the overhead angle and horizontal direction by using a miniature camera and a video camera.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wettability detection, and particularly relates to a method and device for observing droplet evolution characteristics under dynamic constraint of fiber bundles. BACKGROUND

[0002] At present, in the field of wettability detection technology, there is almost no perfect dynamic detection equipment to realize efficient, convenient and automatic detection of the dynamic wettability of magnetic nanodroplets under the constraint of carbon fibers and the dynamic wettability under multiple working conditions.

[0003] In related fields, there are only some devices for detecting the wettability of materials in a static state. For example, an invention patent with the application number CN202022417540.3 discloses a solder wettability detector. The instrument is installed with a lateral lens, a forward lens and a top-down lens on a high-precision three-dimensional workbench. The lateral lens, the forward lens and the top-down lens respectively transmit the data recorded by the lenses to the computer through corresponding data transmission lines, so that the solder wettability and the solder melting state can be observed and measured in all directions. However, this method is limited to detecting the wettability in a static and monotonous state, and cannot realize the detection of the wettability of materials in a dynamic environment. An invention patent with the application number CN202010805043.2 discloses a qualitative detection method for the surface wettability of coal powder samples, which can detect without damaging the original particle size of the coal powder particles, thereby improving the detection accuracy. However, only the method is provided, and there is no perfect automatic and precise detection device, and there is also a lack of dynamic detection function.

[0004] Therefore, it is of great significance to develop an automatic detection method and device for the dynamic wettability of magnetic nanodroplets under the action of carbon fiber tension and compression, which is beneficial to the characterization of microdroplets and realizes the accurate observation of the wettability of carbon fibers in a dynamic situation, and the research on the wettability of the liquid. SUMMARY

[0005] The present application aims at the deficiencies of the prior art, and provides a method and device for observing droplet evolution characteristics under dynamic constraint of fiber bundles.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The present application is a method for observing droplet evolution characteristics under dynamic constraint of fiber bundles, which is as follows:

[0008] Step one, magnetic nanofluid is filled in the syringe barrel of the syringe; the syringe is vertically fixed on the syringe base, and the top of the piston rod of the syringe is in contact with the bottom of the syringe push plate.

[0009] Step two, one end of the two carbon fiber bundles respectively passes through the U-shaped groove of a U-shaped plate, and is pressed by the fixed block on the corresponding U-shaped plate. The fixed block and the U-shaped plate are fixed by bolts. The other end of the two carbon fiber bundles respectively passes through the carbon fiber bundle limiting groove of a T-shaped plate, and respectively passes through a carbon fiber fixing pulley, and is respectively clamped by two fixed magnets. Among them, when the two carbon fiber bundles need to be in parallel state, the two ends of each carbon fiber bundle are through the position of a set of U-shaped grooves and carbon fiber bundle limiting grooves opposite to each other. When the two carbon fiber bundles need to be in cross state, the two ends of each carbon fiber bundle are through a set of U-shaped grooves and carbon fiber bundle limiting grooves whose positions are staggered. The intersection point of the two carbon fiber bundles in cross state is located directly below the syringe and directly above the miniature camera.

[0010] Step three, two sliders on one of the positive and negative tooth guide rail sliding table modules drive two U-shaped plates to move towards each other, and two sliders on the other positive and negative tooth guide rail sliding table module drive two T-shaped plates to move towards each other. The two positive and negative tooth guide rail sliding table modules move synchronously, so that the two parallel carbon fiber bundles move closer to each other to a set distance one, or the included angle of the two crossed carbon fiber bundles decreases to a set angle one. After the two parallel carbon fiber bundles move closer to each other to a set distance one, the nodes of the carbon fibers in the two carbon fiber bundles are all located above the miniature camera.

[0011] Step four, the lifting mechanism drives the linear sliding table module, the syringe base and the syringe to move downward to the end of the needle tube of the syringe close to the distance between the two carbon fiber bundles or the intersection.

[0012] Step five, the slider one of the linear sliding table module drives the syringe push plate and the piston rod of the syringe to move downward by a preset distance. At this time, a certain amount of magnetic nanodroplets are extruded at the end of the needle tube of the syringe, and the extruded magnetic nanodroplets come into contact with the two carbon fiber bundles. The magnetic nanodroplets drop from the end of the needle tube of the syringe to the carbon fiber bundles, and then the magnetic nanodroplets carried by the carbon fiber bundles are in a static state after spreading along the nodes of the carbon fibers in the carbon fiber bundles and the distance or intersection between the two carbon fiber bundles.

[0013] Step six, the lifting mechanism drives the linear sliding table module, the syringe base and the syringe to move upward to reset.

[0014] Step seven, the two sliders two on each positive and negative tooth guide rail sliding table module move away from each other, and the two positive and negative tooth guide rail sliding table modules move synchronously, so that the two carbon fiber bundles reach a set distance two or a set angle two. The miniature camera shoots the dynamic evolution image of the magnetic nanodroplets on the two carbon fiber bundles from the bottom during this process, and the video camera shoots the dynamic evolution image of the magnetic nanodroplets on the two carbon fiber bundles from the side during this process.

[0015] Preferably, before step four is performed, the electric control elevator drives the one end of the rotating plate to rise, so that the rotating plate reaches a preset inclination angle, and drives the syringe push plate, the syringe base, the syringe, the lifting mechanism, the linear slide module, the U-shaped plate, the fixed block, the T-shaped plate, the carbon fiber fixed pulley, the fixed magnet, the positive and negative tooth guide rail slide module, the miniature camera and the two carbon fiber bundles assembled on the rotating plate to tilt synchronously, so that the two carbon fiber bundles form a preset inclination angle relative to the horizontal plane.

[0016] Preferably, before step seven is performed, the electric control lifting platform drives the fine adjustment lead screw type XY axis precision slide table and the camera to rise, so that the camera is adjusted to be at the same height as the magnetic nanometer droplets on the two carbon fiber bundles, and then the fine adjustment lead screw type XY axis precision slide table drives the camera to align the magnetic nanometer droplets on the two carbon fiber bundles.

[0017] Preferably, while step seven is performed, the force sensor is arranged to detect the force change of the carbon fiber bundle.

[0018] The fiber bundle dynamic constraint liquid droplet evolution characteristic observation device provided by the application is characterized in that the device comprises a support table, an experimental device table, an electric control elevator, a storage plate, an observation device and a carrier table.

[0019] The experimental device table comprises a rotating plate, a syringe propulsion mechanism and a carbon fiber bundle tensioning device; the syringe propulsion mechanism comprises a lifting mechanism support, a lifting mechanism, a syringe base, a syringe push plate and a linear slide module. One end of the rotating plate is hinged to one end of the carrier table; the base of the electric control elevator is fixed on the storage plate, the cylinder body passes through the square hole one opened in the support table, and the output end passes through the square hole two opened in the carrier table and is hinged to the rotating plate; the lifting mechanism support is vertically fixed on the other end of the rotating plate; the shell of the lifting mechanism is fixed in the middle part of the lifting mechanism support; the support frame of the linear slide module is driven to rise and fall by the lifting mechanism; the syringe push plate is fixed on the sliding block one of the linear slide module; and the syringe base is fixed on the bottom of the support frame of the linear slide module.

[0020] The carbon fiber bundle tensioning device comprises a reverse tooth guide rail sliding table module and a carbon fiber bundle tensioning mechanism. The rotating plate top surface and the lifting mechanism support lower end position are both fixed with a reverse tooth guide rail sliding table module, and the sliding directions of the two reverse tooth guide rail sliding table modules are parallel. Each of the two sliding blocks of the reverse tooth guide rail sliding table module is fixed with an L-shaped plate. The two U-shaped plates are fixed on the two L-shaped plates connected with one of the reverse tooth guide rail sliding table modules, and the two U-shaped plates are arranged at the same height. The two U-shaped grooves of the two U-shaped plates are opposite to each other and are arranged in a staggered manner perpendicular to the sliding direction of the reverse tooth guide rail sliding table module. Each of the U-shaped plates is fixed with a fixed block through a bolt. The other two L-shaped plates are both fixed with a T-shaped plate. The two T-shaped plates are arranged at the same height. The two carbon fiber bundle limiting grooves are hingedly connected inside the carbon fiber bundle limiting groove. Each of the U-shaped grooves and the opposite carbon fiber bundle limiting groove is arranged at the same height.

[0021] The observation device comprises a camera, a lead screw type XY axis precision sliding table, an electric control lifting table and a miniature camera; the camera is fixed on the moving platform of the lead screw type XY axis precision sliding table; the bottom plate of the lead screw type XY axis precision sliding table is fixed with the top of the electric control lifting table; the bottom of the electric control lifting table is fixed with the top of the electric control lifting table base; the electric control lifting table base is fixed on the object placing plate, and the electric control lifting table passes through the square hole three of the support table; the shooting hole is arranged on the rotating plate below the syringe push plate, and the miniature camera is fixed in the shooting hole.

[0022] Preferably, the output end of the electric control lifting machine is hingedly connected with the position close to the lifting mechanism support at the bottom of the rotating plate.

[0023] Preferably, the shell of the lifting mechanism is fixed with the lifting mechanism support through the I-shaped frame.

[0024] Preferably, the fixed block and the U-shaped plate are fixed with a force sensor.

[0025] The present application has the following advantages:

[0026] 1. The present application fixes two carbon fiber bundles through the carbon fiber bundle tensioning mechanism, and makes one end of the two carbon fiber bundles pass through two U-shaped plates with the same height, notched, and opposite to each other, and offset along the vertical direction of the positive and negative tooth guide rail sliding table module sliding direction, and the other end passes through two T-shaped plates with the same height, notched, and opposite to each other, and offset along the vertical direction of the positive and negative tooth guide rail sliding table module sliding direction, drives the two U-shaped plates through a positive and negative tooth guide rail sliding table module, drives the two T-shaped plates through another positive and negative tooth guide rail sliding table module, changes the parallel spacing or the included angle of the two carbon fiber bundles, and detects the wettability of the dynamic spreading process of the magnetic nanometer droplets between the two carbon fiber bundles with parallel spacing change or intersection angle change through the camera and the miniature camera from two visual angles; further, the present application drives the rotating plate and the injector advancing mechanism thereon, the positive and negative tooth guide rail sliding table module, the carbon fiber bundle tensioning mechanism and the miniature camera to tilt synchronously through the electric control elevator, so that the two carbon fiber bundles form an angle with the horizontal plane, and the dynamic spreading evolution characteristics of the magnetic nanometer droplets on the two carbon fiber bundles under different slopes can be detected. It can be seen that the present application can accurately, conveniently and multi-conditionally match the wettability research and experiment of carbon fiber and other super-hydrophobic materials through the dynamic wettability detection of droplets on different state fiber bundles.

[0027] 2. The present application obtains the dynamic spreading evolution characteristics of the magnetic nanometer droplets on the two carbon fiber bundles through the miniature camera and the camera from the upward angle and the horizontal direction, and the present application sets the force sensor to detect the force change of the carbon fiber bundle, and the force change detection result can be combined and analyzed with the dynamic evolution image of the magnetic nanometer droplets on the two carbon fiber bundles. Therefore, the motion detection result of the droplets on the two carbon fiber bundles is more accurate and more comprehensive.

[0028] 3. The present application can realize automatic segmented feeding of droplets through the linear sliding table module, so as to ensure the accuracy and consistency of the droplet volume in each detection.

[0029] 4. The present application can study the dynamic wettability and mechanical properties of different types of droplets on different types of fiber materials by changing the fiber materials and the types of droplets. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the overall structure of the present application;

[0031] Figure 2 It is the structure of the experimental device table in the present application;

[0032] Figure 3 It is the structure diagram of the T-shaped plate and the carbon fiber bundle in the present application;

[0033] Figure 4 It is the structure of the observation device in the present application;

[0034] Figure 5 This is a schematic diagram showing the magnetic nanodroplets located on two horizontal and parallel carbon fiber bundles in this invention.

[0035] Figure 6 This is a schematic diagram showing the magnetic nanodroplets located on two horizontal and intersecting carbon fiber bundles in this invention.

[0036] Figure 7 This is a schematic diagram of the magnetic nanodroplets located on two inclined and parallel carbon fiber bundles in this invention. Detailed Implementation

[0037] The present invention will now be further described with reference to the accompanying drawings.

[0038] like Figure 1 As shown, this invention discloses an observation device for droplet evolution characteristics under dynamic constraint of fiber bundles, comprising a support table 1, an experimental platform 2, an electrically controlled lifting mechanism 3, a placement plate 4, an observation device 5, and a carrying table. The carrying table is fixed on the support table 1; the placement plate 4 is horizontally fixed under the support table 1.

[0039] like Figure 2 As shown, the experimental setup 2 includes a rotating plate 2-8, a syringe propulsion mechanism, and a carbon fiber bundle tensioning device. The syringe propulsion mechanism includes a lifting mechanism support 2-1, a lifting mechanism 2-2, a syringe base, a syringe push plate 2-6, and a linear slide module. One end of the rotating plate 2-8 is hinged to one end of the carrying table. The base of the electrically controlled lifting mechanism 3 is fixed on the placement plate 4, the cylinder passes through a square hole 1 on the support table 1, and the output end passes through a square hole 2 on the carrying table and is hinged to the rotating plate 2-8. The lifting mechanism support 2-1 is vertically fixed to the other end of the rotating plate 2-8. The housing of the lifting mechanism 2-2 is fixed to the middle of the lifting mechanism support 2-1. The support frame 2-4 of the linear slide module is driven to rise and fall by the lifting mechanism 2-2. The syringe push plate 2-6 is fixed to the slider 1 of the linear slide module. The syringe base is fixed to the bottom of the support frame 2-4 of the linear slide module.

[0040] like Figure 2 and Figure 3As shown, the carbon fiber bundle tensioning device comprises a positive and negative tooth guide rail sliding table module (compared with the ordinary screw sliding table module, the screw rod has positive and negative teeth, which can realize the opposite or opposite movement of the two sliders thereon) and a carbon fiber bundle tensioning mechanism. The carbon fiber bundle tensioning mechanism comprises a fixed block 2-17, an L-shaped plate 2-19, a T-shaped plate 2-20 and a U-shaped plate 2-21; a positive and negative tooth guide rail sliding table module is fixed at the top surface of the rotating plate 2-8 and the lower end position of the lifting mechanism support 2-1, and the sliding directions of the two positive and negative tooth guide rail sliding table modules are parallel; the two sliders 2-11 of each positive and negative tooth guide rail sliding table module are fixed with an L-shaped plate 2-19; the two L-shaped plates 2-19 connected with one of the positive and negative tooth guide rail sliding table modules are fixed with a U-shaped plate 2-21, and the two U-shaped plates 2-21 are arranged at the same height; the U-shaped grooves of the two U-shaped plates 2-21 are opposite to each other and are arranged in a staggered manner perpendicular to the sliding direction of the positive and negative tooth guide rail sliding table module; a fixed block 2-17 is fixed on each U-shaped plate 2-21 by bolts; the other two L-shaped plates 2-19 are fixed with a T-shaped plate 2-20; the two T-shaped plates 2-20 are arranged at the same height; the carbon fiber bundle limiting grooves 2-16 of the two T-shaped plates 2-20 are opposite to each other and are arranged in a staggered manner perpendicular to the sliding direction of the positive and negative tooth guide rail sliding table module; a carbon fiber fixing pulley 2-15 is hinged inside the carbon fiber bundle limiting groove 2-16, as shown. Figure 3 Each U-shaped groove is arranged at the same height as the opposite carbon fiber bundle limiting groove 2-16.

[0041] As shown in Figure 2 and Figure 4 As shown, the observation device 5 comprises a camera 5-1, a screw type XY axis precision sliding table 5-2, an electric control lifting table 5-3 and a miniature camera 2-14; the camera 5-1 is fixed on the moving platform of the screw type XY axis precision sliding table 5-2; the bottom plate of the screw type XY axis precision sliding table 5-2 is fixed with the top of the electric control lifting table 5-3; the bottom of the electric control lifting table 5-3 is fixed with the top of the electric control lifting table base 5-4; the electric control lifting table base 5-4 is fixed on the object plate 4, and the electric control lifting table 5-3 passes through the square hole three of the support table 1; a shooting hole is formed in the position directly below the syringe push plate 2-6 on the rotating plate 2-8, and a miniature camera 2-14 is fixed in the shooting hole.

[0042] The electric control elevator 3 is driven by a self-provided motor one; the lifting mechanism 2-2 can adopt an electric sliding table or a swallow tail groove type Z-axis sliding table, and when the electric sliding table is adopted, the electric sliding table is driven by a self-provided motor two, and is used to drive the linear sliding table module to move up and down; the linear sliding table module is driven by a self-provided motor three 2-3, and drives the syringe push plate 2-6 to move up and down through a lead screw one 2-5 and a sliding block one; the positive and negative tooth guide rail sliding table module is driven by a self-provided motor four 2-9, and drives the two sliding blocks two 2-11 on the positive and negative tooth guide rail sliding table module to move relatively through a lead screw two 2-10; the electric control lifting platform 5-3 is driven by a self-provided motor five; the lead screw type XY-axis precision sliding table 5-2 is driven by a self-provided motor six and a motor seven; the motor one, the motor two, the motor three 2-3, the motor four 2-9, the motor five, the motor six and the motor seven are all controlled by a controller. The camera 5-1 and the miniature camera 2-14 are connected with a computer, the images shot by the camera 5-1 and the miniature camera 2-14 are transmitted to the computer for storage, and after the images shot by the camera are processed and analyzed, the dynamic wetting performance of the magnetic nano liquid droplet under multiple working conditions is researched.

[0043] As a preferred embodiment, the output end of the electric control elevator 3 is hinged to the position close to the lifting mechanism support 2-1 at the bottom of the rotating plate 2-8.

[0044] As a preferred embodiment, the shell of the lifting mechanism 2-2 is fixed with the lifting mechanism support 2-1 through an I-shaped frame.

[0045] As a preferred embodiment, a force sensor 2-22 is fixed between the fixed object block 2-17 and the U-shaped plate 2-21, and is used to detect and research the force change of the liquid droplet in the dynamic pulling process on the carbon fiber bundle.

[0046] The observation method of the liquid droplet evolution characteristics under the dynamic constraint of the fiber bundle is as follows:

[0047] Step one, the magnetic nano liquid is filled in the injection cylinder of the syringe 2-7; the syringe 2-7 is vertically fixed on the syringe base, and the top of the piston rod of the syringe 2-7 is in contact with the bottom of the syringe push plate 2-6.

[0048] Step two, one end of two carbon fiber bundles 2-12 respectively passes through the U-shaped groove of a U-shaped plate 2-21, and is pressed by the fixed block 2-17 on the corresponding U-shaped plate 2-21, and the fixed block 2-17 and the U-shaped plate 2-21 are fixed by bolts; the other end of the two carbon fiber bundles 2-12 respectively passes through the carbon fiber bundle limiting groove 2-16 of a T-shaped plate 2-20, and respectively passes through a carbon fiber fixing pulley 2-15, and is respectively clamped by two fixed magnets 2-13; the end of the carbon fiber bundle 2-12 clamped by the two fixed magnets 2-13 is freely hanging, so that the carbon fiber bundle is kept in tension. Among them, when two carbon fiber bundles 2-12 are required to be in parallel state, the two ends of each carbon fiber bundle 2-12 pass through a set of U-shaped grooves and carbon fiber bundle limiting grooves 2-16 which are opposite in position, and when two carbon fiber bundles 2-12 are required to be in cross state, the two ends of each carbon fiber bundle 2-12 pass through a set of U-shaped grooves and carbon fiber bundle limiting grooves 2-16 which are staggered in position; the intersection point of the two carbon fiber bundles 2-12 in the cross state is located directly below the syringe 2-7 and directly above the miniature camera 2-14. Among them, the two ends of each carbon fiber of the carbon fiber bundle adhere to each other in a tight state, the middle of each carbon fiber of the carbon fiber bundle is in a loose state, and a node is formed in the middle of each carbon fiber of the carbon fiber bundle by chemical deposition; the nodes in the middle of each carbon fiber are aligned in a row.

[0049] Step three, the two sliders two 2-11 on one of the positive and negative tooth guide rail sliding table modules drive the two U-shaped plates 2-21 to move towards each other, the two sliders two 2-11 on the other positive and negative tooth guide rail sliding table module drive the two T-shaped plates 2-20 to move towards each other, and the two positive and negative tooth guide rail sliding table modules move synchronously, so that the two parallel carbon fiber bundles 2-12 are moved close to each other to a set distance one, or the included angle of the two crossed carbon fiber bundles 2-12 is reduced to a set angle one, and after the two parallel carbon fiber bundles 2-12 are moved close to each other to a set distance one, the nodes of the carbon fibers in the two carbon fiber bundles are located above the miniature camera 2-14.

[0050] Step four, the lifting mechanism 2-2 drives the linear sliding table module, the syringe base and the syringe to move downward to the end of the needle tube of the syringe close to the interval or intersection of the two carbon fiber bundles 2-12.

[0051] Step five, the slider of the linear slide module drives the injector push plate 2-6 and the piston rod of the injector to move downward by a preset distance. At this time, the needle tube end of the injector 2-7 extrudes a certain amount of magnetic nanodroplets, and the extruded magnetic nanodroplets contact the two carbon fiber bundles 2-12. Due to the capillary aggregation effect of carbon fibers on the magnetic nanodroplets on the injector, the magnetic nanodroplets drop from the needle tube end of the injector to the carbon fiber bundles 2-12, and then the magnetic nanodroplets carried by the carbon fiber bundles 2-12 gradually spread on the carbon fiber bundles 2-12 along the nodes of each carbon fiber in the carbon fiber bundles 2-12 and the spacing or intersection between the two carbon fiber bundles 2-12, and then become static, as shown in Figure 5 and Figure 6 .

[0052] Step six, the lifting mechanism 2-2 drives the linear slide module, the injector base and the injector to rise and reset.

[0053] Step seven, the two sliders two 2-11 on each forward and reverse tooth guide rail slide module move slowly in opposite directions, and the two forward and reverse tooth guide rail slide modules move synchronously, so that the two carbon fiber bundles 2-12 reach a set spacing two or a set angle two. The miniature camera 2-14 captures dynamic evolution images of the magnetic nanodroplets on the two carbon fiber bundles 2-12 during this process from the bottom, and the video camera 5-1 captures dynamic evolution images of the magnetic nanodroplets on the two carbon fiber bundles 2-12 during this process from the side. This step can measure the dynamic evolution of the magnetic nanodroplets on the two horizontal carbon fiber bundles 2-12 as the spacing or angle between the two carbon fiber bundles 2-12 changes.

[0054] As a preferred embodiment, before step four is performed, the electric control elevator 3 drives one end of the rotating plate 2-8 to rise, so that the rotating plate 2-8 reaches a preset inclination angle, and drives the injector push plate 2-6, the injector base, the injector 2-7, the lifting mechanism 2-2, the linear slide module, the U-shaped plate 2-21, the fixed block 2-17, the T-shaped plate 2-20, the carbon fiber fixed pulley 2-15, the fixed magnet 2-13, the forward and reverse tooth guide rail slide module, the miniature camera 2-14 and the two carbon fiber bundles 2-12 assembled on the rotating plate 2-8 to incline synchronously with the rotating plate 2-8, so that the two carbon fiber bundles 2-12 form a preset inclination angle with the horizontal plane, as shown in Figure 7 . This step can measure the dynamic evolution of the magnetic nanodroplets on the two carbon fiber bundles 2-12 at different inclination angles as the spacing or angle between the two carbon fiber bundles 2-12 changes.

[0055] As a preferred embodiment, before step seven is performed, the electric control lifting platform 5-3 drives the fine adjustment screw type XY axis precision sliding table 5-2 and the camera 5-1 to lift, so that the camera 5-1 is adjusted to the same height as the magnetic nanodroplets on the two carbon fiber bundles 2-12, and then the fine adjustment screw type XY axis precision sliding table 5-2 drives the camera 5-1 to align the magnetic nanodroplets on the two carbon fiber bundles 2-12.

[0056] As a preferred embodiment, while step seven is performed, the force sensor 2-22 is arranged to detect the force change of the carbon fiber bundle, and the force change of the carbon fiber bundle is combined and analyzed with the dynamic evolution image of the magnetic nanodroplets on the two carbon fiber bundles 2-12.

Claims

1. A method for observing droplet evolution characteristics under dynamic constraint of fiber bundle, characterized in that: Specific as follows: Step one, the magnetic nanofluid is loaded into the syringe barrel of the syringe; the syringe is vertically fixed on the syringe base, and the top of the piston rod of the syringe is in contact with the bottom of the syringe push plate; Step two, one end of the two carbon fiber bundles is respectively inserted into the U-shaped groove of one U-shaped plate, and is pressed by the fixed block on the corresponding U-shaped plate, and the fixed block and the U-shaped plate are fixed by bolts; the other end of the two carbon fiber bundles is respectively inserted into the carbon fiber bundle limiting groove of one T-shaped plate, and is respectively wound around one carbon fiber fixing pulley, and is respectively clamped by two fixed magnets; wherein, when the two carbon fiber bundles need to be in parallel state, the two ends of each carbon fiber bundle are inserted into a set of U-shaped grooves and carbon fiber bundle limiting grooves which are opposite in position; when the two carbon fiber bundles need to be in cross state, the two ends of each carbon fiber bundle are inserted into a set of U-shaped grooves and carbon fiber bundle limiting grooves which are staggered in position; the intersection point of the two carbon fiber bundles in cross state is located directly below the syringe and directly above the miniature camera; Step three, the two sliders on one of the positive and negative tooth guide rail sliding table modules drive the two U-shaped plates to move towards each other, and the two sliders on the other positive and negative tooth guide rail sliding table module drive the two T-shaped plates to move towards each other, and the two positive and negative tooth guide rail sliding table modules move synchronously, so that the two parallel carbon fiber bundles are close to each other to a set distance one, or the included angle of the two crossed carbon fiber bundles is reduced to a set angle one, and after the two parallel carbon fiber bundles are close to each other to a set distance one, the nodes of the carbon fibers in the two carbon fiber bundles are all located above the miniature camera; Step four, the lifting mechanism drives the linear sliding table module, the syringe base and the syringe to move downward to the end of the needle tube of the syringe close to the interval or intersection of the two carbon fiber bundles; Step five, the slider one of the linear sliding table module drives the syringe push plate and the piston rod of the syringe to move downward by a preset distance; at this time, a certain amount of magnetic nanodroplet is extruded from the end of the needle tube of the syringe, and the extruded magnetic nanodroplet contacts the two carbon fiber bundles, and then the magnetic nanodroplet drops from the end of the needle tube of the syringe to the carbon fiber bundle, and then the magnetic nanodroplet carried by the carbon fiber bundle spreads on the carbon fiber bundle along the nodes of the carbon fibers in the carbon fiber bundle and the interval or intersection between the two carbon fiber bundles, and then becomes static state; Step six, the lifting mechanism drives the linear sliding table module, the syringe base and the syringe to move upward to reset; Step seven, the two sliders on each positive and negative tooth guide rail sliding table module move away from each other, and the two positive and negative tooth guide rail sliding table modules move synchronously, so that the two carbon fiber bundles reach a set distance two or a set angle two, and the miniature camera shoots the dynamic evolution image of the magnetic nanodroplet on the two carbon fiber bundles in this process from the bottom, and the video camera shoots the dynamic evolution image of the magnetic nanodroplet on the two carbon fiber bundles in this process from the side. Before executing step four, the electric control elevator drives the one end of the rotating plate to rise, so that the rotating plate reaches the preset inclination angle, and drives the injector push plate, the injector base, the injector, the lifting mechanism, the linear slide module, the U-shaped plate, the fixed block, the T-shaped plate, the carbon fiber fixed pulley, the fixed magnet, the positive and negative tooth guide rail slide module, the miniature camera and the two carbon fiber bundles assembled on the rotating plate to tilt synchronously, so that the two carbon fiber bundles form the preset inclination angle relative to the horizontal plane; While executing step seven, the force sensor is arranged to detect the force change of the carbon fiber bundle.

2. The method of claim 1, wherein the method further comprises: Before executing step seven, the electric control lifting platform drives the micrometer lead screw type XY axis precision slide and the camera to rise, so that the camera is adjusted to be at the same height as the magnetic nanometer droplets on the two carbon fiber bundles, and then the micrometer lead screw type XY axis precision slide drives the camera to align the magnetic nanometer droplets on the two carbon fiber bundles.

3. A device for observing the evolution of droplets under the dynamic constraint of fiber bundles, comprising a support table, a storage plate, an observation device and a sample table, characterized in that: The experimental device platform and the electric control elevator are further included; the object table is fixed on the support table; the object plate is horizontally fixed below the table top of the support table; The experimental device platform includes the rotating plate, the injector propulsion mechanism and the carbon fiber bundle tensioning device; the injector propulsion mechanism includes the lifting mechanism support, the lifting mechanism, the injector base, the injector push plate and the linear slide module; one end of the rotating plate is hinged to one end of the object table; the base of the electric control elevator is fixed on the object plate, the cylinder body passes through the square hole one of the support table, and the output end passes through the square hole two of the object table and is hinged to the rotating plate; the lifting mechanism support is vertically fixed at the other end of the rotating plate; the shell of the lifting mechanism is fixed in the middle of the lifting mechanism support; the support frame of the linear slide module is driven to rise and fall by the lifting mechanism; the injector push plate is fixed on the slider one of the linear slide module; the injector base is fixed at the bottom of the support frame of the linear slide module; The carbon fiber bundle tensioning device includes the positive and negative tooth guide rail slide module and the carbon fiber bundle tensioning mechanism; the carbon fiber bundle tensioning mechanism includes the fixed block, the L-shaped plate, the T-shaped plate and the U-shaped plate; one positive and negative tooth guide rail slide module is fixed at the top surface of the rotating plate and the lower end of the lifting mechanism support, and the sliding directions of the two positive and negative tooth guide rail slide modules are parallel; the L-shaped plate is fixed on the two sliders two of each positive and negative tooth guide rail slide module; the U-shaped plate is fixed on the two L-shaped plates connected with one positive and negative tooth guide rail slide module, and the two U-shaped plates are arranged at the same height; the U-shaped grooves of the two U-shaped plates are opposite to each other and are arranged staggered along the direction perpendicular to the sliding direction of the positive and negative tooth guide rail slide module; the fixed block is fixed on each U-shaped plate through bolts; the T-shaped plate is fixed on the other two L-shaped plates; the two T-shaped plates are arranged at the same height; the carbon fiber bundle limiting grooves of the two T-shaped plates are opposite to each other and are arranged staggered along the direction perpendicular to the sliding direction of the positive and negative tooth guide rail slide module; the carbon fiber fixed pulley is hinged inside the carbon fiber bundle limiting groove; each U-shaped groove is arranged at the same height with the carbon fiber bundle limiting groove opposite to it; The observation device includes the camera, the lead screw type XY axis precision slide, the electric control lifting platform and the miniature camera; the camera is fixed on the moving platform of the lead screw type XY axis precision slide; The bottom plate of the screw rod type XY axis precision sliding table is fixed to the top of the electric control lifting table; the bottom of the electric control lifting table is fixed to the top of the electric control lifting table base; the electric control lifting table base is fixed on the object placing plate, and the electric control lifting table passes through the square hole three of the support table; a shooting hole is arranged on the rotating plate and located directly below the syringe push plate, and a miniature camera is fixed in the shooting hole. A force sensor is fixed between the fixed block and the U-shaped plate.

4. The apparatus of claim 3, wherein: The output end of the electric control lifting machine is hinged to the position close to the lifting mechanism support at the bottom of the rotating plate.

5. The apparatus of claim 3, wherein the apparatus further comprises: a light source; and a light detector. The shell of the lifting mechanism is fixed to the lifting mechanism support through the I-shaped frame.

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