Leveling and damping device based on magnetorheological elastomer

Abstract

The leveling and damping device comprises a stable platform and a supporting seat which are arranged up and down, and further comprises a plurality of magnetorheological elastomers and coils, each magnetorheological elastomer comprises an elastomer used for damping and hard magnetic particles arranged in the elastomer, the magnetorheological elastomers are magnetized one by one, and the coils are arranged on the stable platform and the supporting seat. The plurality of coils are arranged on the support seat, so that hard magnetic particles in the coils are magnetized along the inclined direction to form an anisotropic chain structure, the plurality of magnetorheological elastomers are respectively connected with the stable platform and the support seat, the magnetorheological elastomers are used for tensioning and supporting the stable platform so as to enable the stable platform to be suspended on the support seat, and the coils form corresponding magnetic fields when being electrified. The magnetic field applies magnetic force to the hard magnetic particles in the corresponding magneto-rheological elastomer, so that the magneto-rheological elastomer generates corresponding elastic deformation, and further the real-time posture of the stabilized platform is leveled, so that the posture leveling of the stabilized platform can be quickly and accurately realized, and meanwhile, a vibration reduction function is realized.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction, and in particular to a leveling vibration reduction device based on a magnetorheological elastomer. Background Art

[0002] With the rapid development of micro-electromechanical systems (MEMS), various miniaturized detection equipment (such as micro-spectrometers, nano-displacement sensors, micro-lidars, etc.) have been widely used in industrial detection, medical diagnosis, consumer electronics and other fields. During operation, the equipment needs to ensure that its acquisition elements (such as optical sensors, imaging modules, etc.) are precisely perpendicular to the detection plane, and any slight posture deviation and vibration will cause errors in the collected data, which will affect the stability and consistency of the collected data.

[0003] At present, leveling and vibration reduction devices often use mechanical adjustment or piezoelectric ceramic drivers to achieve leveling of the collection elements on their stable platforms. However, the transmission mechanism used in mechanical adjustment has obvious return clearance at the millimeter level, which affects the repeatability of positioning accuracy and has limited response speed. Although the piezoelectric ceramic driver has nanometer-level positioning accuracy, the effective driving stroke is limited. Therefore, none of the above can quickly level the collection elements of miniaturized detection equipment. Summary of the invention

[0004] Therefore, in order to solve the above problems, the present invention provides a leveling and vibration reduction device based on magnetorheological elastomer, which can quickly and accurately achieve the posture leveling of the stable platform and has the vibration reduction function.

[0005] To achieve the above purpose, the technical solution provided by the present invention is as follows: The present invention provides a leveling and vibration reduction device based on magnetorheological elastomer, comprising a stable platform and a support seat arranged in an upper and lower manner, and also comprising a plurality of magnetorheological elastomers and coils matched with the magnetorheological elastomers; the magnetorheological elastomer comprises an elastomer for vibration reduction and a plurality of hard magnetic particles arranged in the elastomer; each magnetorheological elastomer is magnetized one by one, so that the hard magnetic particles inside are magnetized along the inclined direction to form a chain structure with anisotropy; one end of the plurality of magnetorheological elastomers is respectively connected to the stable platform, and one end of the plurality of magnetorheological elastomers away from the stable platform is connected to the support seat, and the magnetorheological elastomer is used to tighten and support the stable platform so that the stable platform is suspended on the support seat; each coil forms a corresponding magnetic field when energized, and the magnetic field applies a magnetic force to the hard magnetic particles in the corresponding magnetorheological elastomer so that the magnetorheological elastomer undergoes corresponding elastic deformation, thereby leveling the real-time posture of the stable platform.

[0006] Furthermore, a plurality of magnetorheological elastomers are arranged in a ring at equal intervals on the stable platform.

[0007] Furthermore, the number of the magnetorheological elastomers and the number of the coils are each an even number.

[0008] Furthermore, every two magnetorheological elastomers are symmetrically distributed on both sides of the central axis of the stable platform, and the directions of the magnetic fields formed by the two oppositely arranged coils when energized are parallel to each other.

[0009] Furthermore, when all coils are not energized and the stable platform is in neutral balance, the magnetorheological elastomer is naturally tightened by the gravity of the stable platform, and at the same time, the suspended section of the magnetorheological elastomer is straightened and extended in an inclined direction, and the direction of the magnetic poles of the magnetized hard magnetic particles in the suspended section is parallel to the horizontal surface of the stable platform.

[0010] Furthermore, the support seat has a plurality of protrusions extending toward the stable platform, and one end of the magnetorheological elastomer away from the stable platform is clamped on the protrusions; one end of the magnetorheological elastomer away from the protrusions is clamped on the stable platform.

[0011] Furthermore, it also includes a detachable clamping plate, and the two ends of the magnetorheological elastomer are clamped and fixed to the protruding portion and the stabilizing platform respectively through the clamping plate.

[0012] Furthermore, the coil is assembled between the magnetorheological elastomer and the support seat.

[0013] Furthermore, the coil is passed with current in positive and reverse directions to form a corresponding magnetic field, thereby ensuring that the posture of the stable platform is always balanced.

[0014] Furthermore, the elastomer is a polymer rubber body; and the hard magnetic particles are neodymium iron boron magnetic particles.

[0015] The technical solution provided by the present invention has the following beneficial effects: By magnetizing each magnetorheological elastomer one by one, the hard magnetic particles inside are magnetized along the inclined direction to form an anisotropic chain structure, so that a magnetorheological elastomer with a muscle fiber-like arrangement can be constructed. Therefore, the chain extension direction of the chain structure can affect the deformation direction of the magnetorheological elastomer itself.

[0016] When the stable platform tilts, a forward or reverse current is passed through each coil and the current value of the coil is adjusted in real time to generate a magnetic field with a corresponding magnetic field direction and strength. At this time, each magnetorheological elastomer is affected by the corresponding magnetic field, that is, the magnetic field applies a magnetic force to the hard magnetic particles in the corresponding magnetorheological elastomer to cause the magnetorheological elastomer to undergo corresponding elastic deformation, thereby realizing rapid and precise leveling of the real-time posture of the stable platform, and being able to achieve millisecond-level posture balance control, and also having a vibration reduction function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows a schematic diagram of the structure of a leveling and vibration reduction device based on a magnetorheological elastomer in an embodiment; Figure 2 The figure shows a cross-sectional view of a leveling and vibration reduction device based on a magnetorheological elastomer in an embodiment; Figure 3 The figure shows the working principle diagram of the leveling and vibration reduction device based on magnetorheological elastomer in the embodiment. DETAILED DESCRIPTION

[0018] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0020] Reference Figures 1 to 3 As shown, this embodiment provides a leveling and vibration reduction device based on magnetorheological elastomer (hereinafter referred to as the vibration reduction device) for leveling the posture of the collection elements of various miniaturized detection equipment during operation, and at the same time achieving a vibration reduction effect.

[0021] like Figure 1 and Figure 2 As shown, the vibration reduction device of this embodiment includes four magnetorheological elastomers 2, four coils 5 matched with the magnetorheological elastomers 2, and a stable platform 1 and a support seat 4 respectively arranged at the upper and lower parts, wherein the stable platform 1 is used to carry or fix the support collection element (such as an optical sensor, an imaging module, etc.).

[0022] The magnetorheological elastomer 2 of this embodiment includes an elastomer for vibration reduction and a plurality of hard magnetic particles arranged in the elastomer, and the undeformed elastomer is in a long strip shape.

[0023] The four magnetorheological elastomers 2 are respectively clamped on the circumferential wall of the stable platform 1 at their inner ends in the long direction, and are respectively clamped on the four protruding ends of the support seat 4 at their outer ends in the long direction away from the stable platform 1.

[0024] like Figure 3 As shown, when the magnetorheological elastomer 2 is tightened and supports the stable platform 1, the stable platform 1 is suspended in the center of the support seat 4. At the same time, the magnetorheological elastomer 2 has a suspended suspended section 21 to ensure that the magnetorheological elastomer 2 can produce free deformation under the action of external force, thereby ensuring that the posture of the stable platform 1 can be accurately controlled and a contact-free friction setting can be achieved.

[0025] In this embodiment, four magnetorheological elastomers 2 are arranged in a ring at equal intervals on the circumferential wall of the stable platform 1 , that is, the four magnetorheological elastomers 2 are cross-shaped and symmetrically distributed in pairs.

[0026] like Figure 3 As shown, the directions of the magnetic field H formed by the two oppositely arranged coils 5 when energized are parallel to each other, thus ensuring that the magnetorheological elastomer 2 can deform more stably and reliably during leveling, and the control of the magnetic field H is also relatively simple.

[0027] By magnetizing each magnetorheological elastomer 2 one by one, the hard magnetic particles inside are magnetized along the inclined direction to form an anisotropic chain structure 22. In this way, a magnetorheological elastomer 2 with a muscle fiber arrangement can be constructed. Therefore, the chain extension direction of the chain structure 22 can affect the deformation direction of the magnetorheological elastomer 2 itself.

[0028] like Figure 3 As shown, when all coils 5 are not energized and the stable platform 1 is in neutral equilibrium, the magnetorheological elastomer 2 is naturally tightened by the gravity of the stable platform 1, and at the same time, the suspended section 21 of the magnetorheological elastomer 2 is straightened and extended in the inclined direction. At this time, the direction of the magnetic poles of the magnetized hard magnetic particles in the suspended section 21 is parallel to the horizontal surface of the stable platform 1, that is, only the chain extension direction of the chain structure 22 in the inclined extended suspended section 21 is parallel to the horizontal surface of the stable platform 1, and the chain extension direction of the chain structure 22 in the magnetorheological elastomer 2 in other sections (such as the clamped sections at both ends of the magnetorheological elastomer 2 in the long direction) is inclined and crosses the horizontal surface of the stable platform 1.

[0029] When the stable platform 1 tilts, a positive or reverse current is passed through each coil 5, and the current value of each coil 5 is adjusted in real time to generate a corresponding magnetic field H in the positive and reverse directions. At this time, each magnetorheological elastomer 2 is affected by the corresponding magnetic field H, that is, the magnetic field H applies a magnetic force to the hard magnetic particles in the corresponding magnetorheological elastomer 2, so that the magnetorheological elastomer 2 undergoes corresponding elastic deformation, thereby realizing rapid and precise leveling of the real-time posture of the stable platform 1, and can achieve millisecond-level posture balance control, and also has a vibration reduction function.

[0030] Of course, in other embodiments, the number of magnetorheological elastomers 2 and coils 5 can also be an even number such as 6 or 8, and can be adjusted accordingly according to the number of degrees of freedom of the stable platform 1 and the required balance angle, such as increasing the number of magnetorheological elastomers 2 from 4 to 8, thereby providing more dimensional posture adjustment capabilities and better vibration reduction performance.

[0031] In addition, the number of magnetorheological elastomers 2 and coils 5 can also be an odd number such as 3 or 5, but the posture control method of the stable platform 1 is more complicated, that is, the current size and direction of all coils 5 need to be controlled simultaneously.

[0032] In another preferred embodiment, the support seat 4 has four protrusions 41 extending toward the stable platform 1, and the inward end of each magnetorheological elastomer 2 is respectively clamped on the corresponding protrusion 41. In this case, the protrusion 41 is the protruding end of the support seat 4. Of course, in other embodiments, the two ends of the magnetorheological elastomer 2 can also be fixedly assembled on the support seat 4 and the stable platform 1 respectively by clamping or bonding.

[0033] More specifically, the vibration reduction device of this embodiment also includes a detachable clamp 3, and the magnetorheological elastomer 2 is clamped and fixed to the protrusion 41 and the stabilizing platform 1 at both ends in its long direction by the clamp 3 and the locking bolts, and each coil 5 is assembled between the corresponding magnetorheological elastomer 2 and the support seat 4.

[0034] In this specific embodiment, the specific elastomer is a polymer rubber such as silicone rubber, and the specific hard magnetic particles are neodymium iron boron magnetic particles. When the magnetorheological elastomer 2 needs to be prepared, the liquid silicone rubber matrix and the unmagnetized hard magnetic particles are first fully mixed to make the hard magnetic particles evenly dispersed in the silicone rubber matrix, and then injected into a molding mold, and then thermosetting to prepare an elastomer in the form of a long strip and embedded with hard magnetic particles. Then, an inclined directional magnetization technology is used (i.e., using a high-voltage capacitor to instantly discharge a low-resistance coil to generate a pulsed magnetic field with a peak value of 1 to 3T) to magnetize the hard magnetic particles along a preset inclined direction to form a magnetorheological elastomer 2 with a chain structure 22 with a certain inclined extension. At this time, the chain extension direction of the chain structure 22 is parallel to the magnetization direction. Because the chain structure 22 gives the magnetorheological elastomer 2 a certain anisotropy, it causes a controllable deformation along a specific direction under the subsequent magnetic field H excitation, and is driven by the uniform magnetic field H and maintains a certain static balance angle, so that the real-time posture of the stable platform 1 can be effectively leveled.

[0035] The coercive force of the magnetized hard magnetic particles is large, so their residual magnetization intensity is also high. When the magnetorheological elastomer 2 is placed in the magnetic field H formed by the coil 5, if the magnetic pole direction of the hard magnetic particles therein is inconsistent with the direction of the magnetic field H formed by the coil 5, the magnetic pole direction of the hard magnetic particles will tend to rotate in the direction of the magnetic field H, and a magnetic couple will be generated at the same time. Therefore, the magnetorheological elastomer 2 can produce complex and controllable deformation under the action of the magnetic field H formed by the coil 5, and the deformation direction of the magnetorheological elastomer 2 is controlled by the magnetic field H in the positive and negative directions, that is, a magnetic-mechanical coupling response mechanism is formed.

[0036] The magnetic field H generated by the coil 5 restricts the magnetorheological elastomer 2 so that the magnetorheological elastomer 2 can be deformed quickly, thereby quickly controlling the posture of the stable platform 1 to stabilize again, thereby achieving a fast response speed.

[0037] Furthermore, by inputting currents of different magnitudes to generate magnetic fields H of different strengths, the deformation degree of the magnetorheological elastomer 2 can be controlled in this way, and stepless adjustment can be achieved, thereby ensuring that the stable platform 1 can achieve sub-micron precision leveling or control.

[0038] In addition, the magnetorheological elastomer 2 itself has a certain elasticity, which can not only effectively buffer external impacts, but also change its material properties by changing the magnetic field H to achieve a vibration reduction effect.

[0039] In summary, the vibration reduction device of this embodiment can quickly and accurately achieve the posture stabilization of the stable platform 1, and has a vibration reduction function, and can achieve both fast response and high precision through magnetorheological properties. Therefore, the vibration reduction device of this embodiment has the advantages of fast response speed, no contact friction and stepless adjustment, and is also suitable for leveling the collection elements of miniaturized detection equipment.

[0040] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A leveling and vibration reduction device based on magnetorheological elastomer, comprising a stable platform and a support seat arranged in upper and lower positions, characterized in that: It also includes a plurality of magnetorheological elastomers and coils matched to the magnetorheological elastomers; The magnetorheological elastomer includes an elastomer for vibration reduction and a plurality of hard magnetic particles arranged in the elastomer; each magnetorheological elastomer is magnetized one by one so that the hard magnetic particles therein are magnetized along an inclined direction to form an anisotropic chain structure; One end of a plurality of magnetorheological elastomers is respectively connected to the stable platform, one end of a plurality of magnetorheological elastomers away from the stable platform is connected to the support seat, and the magnetorheological elastomers are used to tighten and support the stable platform so that the stable platform is suspended on the support seat; When each coil is energized, a corresponding magnetic field is formed, and the magnetic field applies a magnetic force to the hard magnetic particles in the corresponding magnetorheological elastomer, so that the magnetorheological elastomer undergoes corresponding elastic deformation, thereby leveling the real-time posture of the stable platform.

2. The leveling and vibration reduction device based on magnetorheological elastomer according to claim 1 is characterized in that: A plurality of magnetorheological elastic bodies are arranged in a ring with equal intervals on the stable platform.

3. The leveling and vibration reduction device based on magnetorheological elastomer according to claim 2 is characterized in that: The number of the magnetorheological elastomer and the number of the coils are both even numbers.

4. The leveling and vibration reduction device based on magnetorheological elastomer according to claim 3 is characterized in that: Every two magnetorheological elastomers are symmetrically distributed on both sides of the central axis of the stable platform, and the directions of the magnetic fields formed by the two oppositely arranged coils when energized are parallel to each other.

5. The leveling and vibration reduction device based on magnetorheological elastomer according to claim 1 is characterized in that: When all coils are not energized and the stable platform is in neutral balance, the magnetorheological elastomer is naturally tightened by the gravity of the stable platform, and at the same time, the suspended section of the magnetorheological elastomer is straightened and extended in an inclined direction, and the magnetic pole direction of the magnetized hard magnetic particles in the suspended section is parallel to the horizontal surface of the stable platform.

6. The leveling and vibration reduction device based on magnetorheological elastomer according to any one of claims 1 to 5, characterized in that: The support seat has a plurality of protrusions extending toward the stable platform, and one end of the magnetorheological elastomer away from the stable platform is clamped on the protrusions; one end of the magnetorheological elastomer away from the protrusions is clamped on the stable platform.

7. The leveling and vibration reduction device based on magnetorheological elastomer according to claim 6 is characterized in that: It also includes a detachable clamping plate, and the two ends of the magnetorheological elastomer are clamped and fixed to the protruding portion and the stabilizing platform respectively through the clamping plate.

8. The leveling and vibration reduction device based on magnetorheological elastomer according to claim 6 is characterized in that: The coil is assembled between the magnetorheological elastomer and the support seat.

9. The leveling and vibration reduction device based on magnetorheological elastomer according to any one of claims 1 to 5, characterized in that: The coil is fed with current in positive and reverse directions to form a corresponding magnetic field, thereby ensuring that the posture of the stable platform is always balanced.

10. The leveling and vibration reduction device based on magnetorheological elastomer according to any one of claims 1 to 5, characterized in that: The elastomer is a polymer rubber body; the hard magnetic particles are neodymium iron boron magnetic particles.

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