Multi-mode self-oscillation three-line pendulum platform based on CD-ROM liquid crystal elastomer fibers

Abstract

The invention relates to the technical field of multi-degree-of-freedom motion platforms, in particular to a multi-mode self-oscillation three-line pendulum platform based on CD-ROM liquid crystal elastomer fibers, which comprises a bottom plate, a bracket is mounted at the top of the bottom plate, a motion platform assembly is mounted on the bracket, and an infrared laser is mounted on the bottom plate; the motion platform assembly comprises an upper suspension disc, a lower suspension disc and LCE fibers, the upper suspension disc is fixedly connected with the support, the upper suspension disc and the lower suspension disc are connected through the LCE fibers, the upper suspension disc and the lower suspension disc are identical circular flat plates, the two ends of the three LCE fibers are installed on the side lines of the upper suspension disc and the lower suspension disc respectively, the lengths of the three LCE fibers are identical, and the length of the LCE fibers is equal to that of the LCE fibers. And the three LCE fibers are parallel to one another. The technical problems that an existing multi-degree-of-freedom motion platform depends on a complex mechanical structure or electromagnetic control, the size is large, energy consumption is high, driving can only be achieved through contact and the like are solved, and the existing multi-degree-of-freedom motion platform is difficult to be suitable for the fields of miniaturization, electromagnetic interference resistance and non-contact driving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multi-degree-of-freedom motion platform, in particular to a multi-modal self-excited oscillation three-wire pendulum platform based on light-driven liquid crystal elastomer fibers. BACKGROUND

[0002] A multi-degree-of-freedom motion platform is a mechatronic device capable of controlled motion in one or more directions, and its core function is to accurately simulate the complex motion state of an object in space. Traditional multi-degree-of-freedom motion platforms rely on complex mechanical structures or electromagnetic control, and have problems such as large size, high energy consumption, and the need for contact driving. Electromagnetic interference may affect the motion state of the platform. The present application uses linear light illumination LCE fibers to drive the multi-modal motion of the platform through fiber thermal deformation. This process does not require mechanical contact and can be applied to the fields of miniaturization, electromagnetic interference resistance, and non-contact driving control. SUMMARY

[0003] To solve the technical problems of the prior art, the present application provides a multi-modal self-excited oscillation three-wire pendulum platform based on light-driven liquid crystal elastomer fibers, which solves the problems of the prior art multi-degree-of-freedom motion platform, such as reliance on complex mechanical structures or electromagnetic control, large size, high energy consumption, and the need for contact driving, and difficulty in being applied to the fields of miniaturization, electromagnetic interference resistance, and non-contact driving.

[0004] To solve the above technical problems, the present application provides the following technical solutions: The multi-modal self-excited oscillation three-wire pendulum platform based on light-driven liquid crystal elastomer fibers comprises a bottom plate, a support mounted on the top of the bottom plate, a motion platform assembly mounted on the support, and an infrared laser mounted on the bottom plate. The motion platform assembly comprises an upper suspension disc, a lower suspension disc, and LCE fibers. The upper suspension disc is fixedly connected to the support, and the upper suspension disc and the lower suspension disc are connected by the LCE fibers. The upper suspension disc and the lower suspension disc are identical circular plates, and the two ends of the three LCE fibers are mounted on the edges of the upper suspension disc and the lower suspension disc, respectively.

[0005] Further, the three LCE fibers have the same length and are parallel to each other.

[0006] Further, the connection points of the three LCE fibers to the upper suspension disc are points A, B, and C, respectively, and the connection points of the three LCE fibers to the lower suspension disc are points a, b, and c, respectively. The linear light illumination area of the infrared laser coincides with the initial position of the LCE fibers passing through points A and a.

[0007] Further, the laser beam emitted by the infrared laser is located between the parallel direction and the vertical direction of the straight line connecting the B point and the C point in the projection direction parallel to the upper suspension disc plane, or is parallel to the BC line, or is perpendicular to the BC line.

[0008] Further, the upper suspension disc and the lower suspension disc are each provided with a limiting groove at the top point, and the two ends of the LCE fiber extend into the limiting groove.

[0009] Further, the bracket comprises a cross beam, a stand and a base, the base is fixed on the bottom plate, the stand is fixed with the base, the cross beam is installed on the top of the stand, and the motion platform assembly is fixedly connected with the cross beam.

[0010] Further, the bottom plate is provided with a longitudinal rod on the top, the longitudinal rod is provided with a sleeve outside, the sleeve is fixedly connected with a side plate on one side, and the infrared laser is installed on the side plate.

[0011] Further, the bottom plate is provided with a guide rail on the top, the guide rail is provided with a roller on both sides, the roller is fixedly connected with a horizontal plate on the top, and the longitudinal rod is installed on the horizontal plate.

[0012] By the above technical scheme, the application provides a multi-mode self-excited oscillation three-line swing platform based on light-driven liquid crystal elastomer fiber, which has at least the following beneficial effects: 1. The motion platform assembly and the infrared laser are arranged, so that the motion platform can continuously move only by continuous infrared light irradiation, the driving is realized by non-contact light irradiation, the structure is simple and resistant to electromagnetic interference, compared with the mechanical driving process, the application does not need complex mechanical structure, and can quickly deform and move after light irradiation, thereby shortening the response time of the multi-degree-of-freedom motion platform in the driving starting stage, and being suitable for the fields of miniaturization, electromagnetic interference resistance and non-contact driving.

[0013] 2. The infrared laser irradiates along the perpendicular line direction of the line connecting the B point and the C point, generates a torque around the axis perpendicular to the ABC plane on the lower suspension disc, causes the suspension disc to twist, drives the A point LCE fiber to move out of the light irradiation area, and the A point LCE fiber restores deformation when there is no light irradiation, thereby returning to the initial state and moving the lower suspension disc and the LCE fiber to the starting point, repeating the above process, and forming a self-excited torsional oscillation motion mode under the action of the inertia force of the suspension disc.

[0014] 3. The infrared laser irradiates along the parallel line direction of the line connecting the B point and the C point, causes the lower suspension disc to swing perpendicular to the BC direction, drives the A point LCE fiber to move out of the light irradiation area, and the A point LCE fiber restores deformation when there is no light irradiation, thereby returning to the initial state and moving the lower suspension disc and the LCE fiber to the starting point, repeating the above process, and forming a self-excited swing oscillation motion mode under the action of the inertia force of the suspension disc.

[0015] 4、The application generates a moment of force around the vertical axis direction of the ABC plane by the infrared laser irradiating the LCE fiber at the A point between the D direction and the E direction, the spatial pose of the lower suspension disc changes, and a self-excited torsion and swing compound oscillation mode is formed.

[0016] 5、The application adjusts the irradiation direction of the infrared laser according to the needs through the guide rail and the roller, so that the multi-degree-of-freedom motion platform moves faster according to the needs of the swing mode. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic view of the overall structure of the application; Figure 2 It is a schematic view of the motion platform assembly of the application; Figure 3 It is a schematic view of the light irradiation direction of the infrared laser of the application; Figure 4 It is a schematic view of the infrared laser and the guide rail of the application.

[0018] In the drawings: 1, bottom plate; 2, support; 21, cross beam; 22, stand; 23, base; 3, motion platform assembly; 31, upper suspension disc; 32, lower suspension disc; 33, LCE fiber; 4, infrared laser; 5, longitudinal rod; 6, sleeve; 7, side plate; 8, guide rail; 9, roller; 10, cross plate; 11, limiting groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0020] Embodiment one In order to simplify the structure of the driver of the multi-degree-of-freedom motion platform, and accelerate the response speed of driving the multi-degree-of-freedom motion platform, so as to realize the application of the multi-degree-of-freedom motion platform in the field of high precision, miniaturization and anti-electromagnetic interference, please refer to Figures 1-4The embodiment proposes a multi-mode self-excited oscillation three-wire pendulum platform based on light-driven liquid crystal elastomer fiber, which comprises a bottom plate 1, a support 2 is installed on the top of the bottom plate 1, a motion platform assembly 3 is installed on the support 2, an infrared laser 4 is installed on the bottom plate 1, the motion platform assembly 3 comprises an upper suspension disc 31, a lower suspension disc 32 and LCE fibers 33, the upper suspension disc 31 is fixedly connected with the support 2, the upper suspension disc 31 and the lower suspension disc 32 are connected through the LCE fibers 33, the upper suspension disc 31 and the lower suspension disc 32 are the same circular plates, and can also be equilateral triangular plates, the shape of the upper suspension disc 31 and the lower suspension disc 32 does not affect the motion process of the platform driven, and therefore is not limited to the above shapes, and the two ends of the three LCE fibers 33 are evenly installed on the edge lines of the upper suspension disc 31 and the lower suspension disc 32 respectively.

[0021] In use, after the position of the infrared laser 4 is fixed, the infrared laser 4 irradiates on one of the LCE fibers 33, the heat on the light irradiated by the infrared laser 4 is absorbed by the LCE fiber 33, so that the temperature of the irradiated LCE fiber 33 is raised, the LCE fiber 33 is deformed due to the shrinkage caused by the temperature rise, and drives the lower suspension disc 32 and all the LCE fibers to move, the LCE fiber 33 deformed due to the shrinkage after being irradiated by the infrared laser 4 is displaced out of the light irradiation area, the LCE fiber 33 restores the deformation in the absence of light, and the lower suspension disc 32 drives all the LCE fibers to return to the starting point under the action of its own gravity, and then the process is repeatedly, so as to realize the continuous motion of the motion platform, and the motion platform can be continuously driven only by the continuous irradiation of infrared light, the driving is realized by non-contact light irradiation, the structure is simple and resistant to electromagnetic interference, and compared with the mechanical driving process, the motion platform does not need complex mechanical structure, and can quickly deform and move after light irradiation, so that the response time of the multi-degree-of-freedom motion platform in the driving starting stage is shortened, and the motion platform can be applied to the fields of miniaturization, resistance to electromagnetic interference and non-contact driving.

[0022] In order to realize the self-excited torsional oscillation motion mode of the multi-degree-of-freedom motion platform, referring to Figure 4 , the lengths of the three LCE fibers 33 are the same, and the three LCE fibers 33 are parallel to each other, the connection points of the three LCE fibers 33 with the upper suspension disc 31 are A point, B point and C point respectively, the connection points of the three LCE fibers 33 with the lower suspension disc 32 are a point, b point and c point respectively, the linear laser beam emitted by the infrared laser 4 covers and coincides with the LCE fiber 33 segment passing through the A point, and the laser beam emitted by the infrared laser 4 is perpendicular to the BC line.

[0023] When in use, the irradiation direction of the infrared laser 4 along the middle line of the line connecting the B point and the C point is defined as the D direction, and the parallel direction of the line connecting the B point and the C point is defined as the E direction. When the A point LCE fiber 33 is irradiated by the infrared laser 4 in the D direction, the A point LCE fiber 33 will be deformed by contraction, and the overall configuration of the motion platform system will change. The A point LCE fiber 33 will be inclined, and a torque around the axis perpendicular to the ABC plane will be generated on the lower suspension disc, so that the suspension disc is twisted, and the A point LCE fiber 33 is moved out of the light irradiation area. When there is no light irradiation, the A point LCE fiber 33 will restore the deformation, and then will have a motion trend to return to the initial state, so that the lower suspension disc 32 and the LCE fiber 33 move to the starting point, and the above process is repeated. Under the action of the inertia force of the suspension disc, a self-excited torsional oscillation motion mode is formed.

[0024] In order to facilitate the installation of the motion platform assembly 3 and the infrared laser 4, with reference to Figure 1 , the support 2 comprises a cross beam 21, a stand column 22 and a base 23. The base 23 is fixed on the bottom plate 1, the stand column 22 is fixed with the base 23, and the cross beam 21 is installed on the top of the stand column 22. The motion platform assembly 3 is fixedly connected with the cross beam 21. A longitudinal rod 5 is installed on the top of the bottom plate 1. The longitudinal rod 5 is externally sleeved with a sleeve 6. One side of the sleeve 6 is fixedly connected with a side plate 7. The infrared laser 4 is installed on the side plate 7.

[0025] When in use, the motion platform assembly 3 is installed on the cross beam 21, and the infrared laser 4 is installed on the side plate 7. The position of the longitudinal rod 5 is adjusted so that the irradiation direction of the infrared laser 4 meets the requirements, and the installation process of the infrared laser 4 and the motion platform assembly 3 is completed.

[0026] Example two In order to realize the purpose of forming a self-excited swing oscillation motion mode of the multi-degree-of-freedom motion platform, with reference to Figures 1-4 , on the basis of example one, the laser beam emitted by the infrared laser 4 is parallel to the BC line.

[0027] When in use, the A point LCE fiber 33 is irradiated in the E direction, and the direction is parallel to the line connecting the B point and the C point. At this time, the A point LCE fiber 33 will be deformed by contraction, and the overall configuration of the motion platform system will change. The center of gravity of the lower suspension disc 32 will move upward, so that the lower suspension disc 32 swings vertically to the BC direction, and then drives the A point LCE fiber 33 to move out of the light irradiation area. When there is no light irradiation, the A point LCE fiber 33 will restore the deformation, and then will have a motion trend to return to the initial state, so that the lower suspension disc 32 and the LCE fiber 33 move to the starting point, and the above process is repeated. Under the action of the inertia force of the suspension disc, a self-excited swing oscillation motion mode is formed.

[0028] Example three In order to realize the purpose of forming a self-excited torsional and swing compound oscillation motion mode of the multi-degree-of-freedom motion platform, with reference toFigures 1-4 On the basis of embodiment one, the laser beam emitted by the infrared laser 4 is located between the parallel direction and the vertical direction of the straight line connecting the B point and the C point in the projection direction parallel to the plane of the upper suspension disc 31.

[0029] In use, the light irradiation direction of the infrared laser 4 is controlled between the D direction and the E direction, after the infrared laser 4 irradiates the LCE fiber 33 at the A point, the LCE fiber 33 will be deformed by shrinkage, the overall configuration of the moving platform system will change direction, a torque around the vertical ABC plane axis direction is generated on the lower suspension disc 32, the spatial pose of the lower suspension disc changes, forming a self-excited torsion and swing composite oscillation motion mode.

[0030] Embodiment four In order to facilitate the adjustment of the light irradiation direction of the infrared laser 4, referring to Figures 1-4 On the basis of embodiment one, the upper suspension disc 31 and the lower suspension disc 32 are both provided with a limiting groove 11 at the top, the two ends of the LCE fiber 33 are both extended into the limiting groove 11, the top of the bottom plate 1 is provided with a guide rail 8, the two sides of the guide rail 8 are both provided with a roller 9, the top of the roller 9 is fixedly connected with a horizontal plate 10, and the vertical rod 5 is installed on the horizontal plate 10.

[0031] In use, the staff pushes the vertical rod 5 to move, thereby driving the horizontal plate 10 and the roller 9 to move along the guide rail 8, the vertical rod 5 drives the infrared laser 4 above it to move after moving, until the irradiation direction of the infrared laser 4 is in the D direction, the E direction or between the D direction and the E direction, so as to conveniently adjust the irradiation direction of the infrared laser 4 according to the needs, so that the moving platform can move faster in the required swing mode.

[0032] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber, comprising a base plate (1), characterized in that, A bracket (2) is installed on the top of the base plate (1), a motion platform assembly (3) is installed on the bracket (2), and an infrared laser (4) is installed on the base plate (1). The motion platform assembly (3) includes an upper suspension plate (31), a lower suspension plate (32), and LCE fibers (33). The upper suspension plate (31) is fixedly connected to the bracket (2). The upper suspension plate (31) and the lower suspension plate (32) are connected by LCE fibers (33). The upper suspension plate (31) and the lower suspension plate (32) are identical circular flat plates. The two ends of the three LCE fibers (33) are respectively installed on the edge lines of the upper suspension plate (31) and the lower suspension plate (32).

2. The multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber according to claim 1, characterized in that, The three LCE fibers (33) are of the same length and are parallel to each other.

3. The multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber according to claim 1, characterized in that, The connection points between the three LCE fibers (33) and the upper suspension plate (31) are points A, B and C, respectively. The connection points between the three LCE fibers (33) and the lower suspension plate (32) are points a, b and c, respectively. The linear illumination area irradiated by the infrared laser (4) coincides with the initial position of the LCE fibers (33) passing through points A and a.

4. The multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber according to claim 1, characterized in that, Limiting grooves (11) are provided at the apex of both the upper suspension plate (31) and the lower suspension plate (32), and both ends of the LCE fiber (33) extend into the limiting grooves (11).

5. The multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber according to claim 1, characterized in that, The support (2) includes a crossbeam (21), a column (22) and a base (23). The base (23) is fixed on the base plate (1), the column (22) is fixed to the base (23), the crossbeam (21) is installed on the top of the column (22), and the motion platform assembly (3) is fixedly connected to the crossbeam (21).

6. The multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber according to claim 1, characterized in that, The bottom plate (1) is equipped with a longitudinal rod (5) on the top, and a sleeve (6) is sleeved on the outside of the longitudinal rod (5). A side plate (7) is fixedly connected to one side of the sleeve (6), and an infrared laser (4) is installed on the side plate (7).

7. The multimodal self-excited oscillation trifilar pendulum platform based on optical drive liquid crystal elastomer fiber according to claim 6, characterized in that, The bottom plate (1) is equipped with a guide rail (8) on the top. Rollers (9) are provided on both sides of the guide rail (8). A horizontal plate (10) is fixedly connected to the top of the roller (9). The longitudinal rod (5) is installed on the horizontal plate (10).

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