Optical load variable damping self-adaptive vibration isolator
By using a vibration isolator composed of shape memory alloy and magnetorheological damping fluid, the problems of adaptability and automatic reset of traditional vibration isolators in high-precision optical systems are solved. Damping adjustment and rapid reset are achieved in complex vibration environments, ensuring the stability of optical loads and imaging quality.
Patent Information
- Application Number
- CN202520562306.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Traditional vibration isolators are difficult to adapt to vibration environments with different frequencies and amplitudes in high-precision optical systems, and they cannot automatically reset, resulting in a decrease in the stability of the optical system. Existing variable damping vibration isolators have problems such as complex structure, high cost, or slow response speed.
A vibration isolation component consisting of shape memory alloy units, an inner cavity, an electromagnetic coil, a magnetorheological damping fluid, and an accelerometer is used. The accelerometer monitors vibration information, adjusts the magnetic field to regulate damping, and combines the self-resetting capability of the shape memory alloy to achieve multi-degree-of-freedom vibration suppression.
It achieves adjustable damping characteristics under complex vibration environments, enabling rapid reset and ensuring high stability and high-precision imaging of optical loads.
Smart Images
Figure CN223794572U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of optical load vibration suppression, specifically relates to a variable damping self -adapting type vibration isolator. BACKGROUND
[0002] In high-precision optical systems, such as astronomical telescopes, space optical loads or precision laser equipment, small vibrations can significantly affect imaging quality or measurement accuracy. Traditional vibration isolators usually use fixed damping design, which is difficult to adapt to different frequency and amplitude vibration environments, and cannot automatically reset after vibration, resulting in a decrease in the stability of the optical system. In addition, existing vibration isolators often show insufficient damping or excessive damping when dealing with complex vibration spectra, and cannot achieve optimal vibration suppression effect.
[0003] In recent years, as the vibration suppression requirements of optical loads continue to improve, researchers have begun to explore vibration isolation technology with adaptive ability. For example, variable damping vibration isolators based on magnetorheological fluid or piezoelectric materials have been proposed, but these solutions have problems such as complex structure, high cost or slow response speed. In addition, there is a lack of a vibration isolator that can automatically recover to the initial position after vibration, which is particularly important in high-precision optical systems.
[0004] Therefore, there is an urgent need for a new type of vibration isolator that can adjust the variable damping under complex vibration environment and automatically reset after vibration to ensure the high stability and high precision of the optical load. INVENTION CONTENTS
[0005] The utility model provides a variable damping self -adapting type vibration isolator can adjust the damping characteristic according to vibration frequency and amplitude, and resets quickly after vibration, thereby effectively inhibiting the vibration of optical load.
[0006] The utility model mainly comprises 3 vibration isolation components, an outer cavity, an acceleration sensor and a control unit. Each vibration isolation component is composed of a shape memory alloy unit, an inner cavity, an electromagnetic coil, a magnetorheological damping fluid and a spring. The outer cavity is also made of memory alloy, and the inner cavity can be made of magnetic or non-magnetic material, depending on the required damping size, but it needs to be made of material with high stiffness, so that it deforms less when damping. The shape memory alloy unit and the magnetorheological damping unit are distributed at intervals. The utility model has the beneficial effects of:
[0007] 1. The utility model adopts the damping adjustable elastic element based on magnetorheological damping fluid, and the acceleration sensor can transmit the monitored acceleration information to the control unit, and suppress vibration by adjusting the magnetic field size to adapt to different vibration conditions;
[0008] 2. The utility model adopts 3 sets of vibration isolation elements symmetrically distributed, which can suppress vibration of optical load in multiple degrees of freedom;
[0009] 3. The utility model discloses vibration isolation element and outer cavity adopt memory alloy material, memory alloy has the ability of shape deformation memory, so that optical load can reset after vibration, and vibration will not be transmitted to optical effective load, and optical load imaging is not influenced. BRIEF DESCRIPTION OF DRAWINGS
[0010] Other features, objects, and advantages of the utility model will become more apparent from the following detailed description of non-limiting embodiments with reference to the drawings.
[0011] Figure 1 It is structure diagram for vibration isolator to constitute;
[0012] In the drawing: 1 - outer cavity, 2 - shape memory alloy unit, 3 - inner cavity, 4 - electromagnetic coil,
[0013] 5 - magneto-rheological damping fluid, 6 - spring, 7 - acceleration sensor and control unit, 8 - vibration isolation assembly. DETAILED DESCRIPTION
[0014] The technical scheme in the utility model will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0015] As shown in the figure, the optical load variable-damping self-adaptive vibration isolator provided by the utility model is composed of three vibration isolation assemblies 8, an outer cavity 1 and an acceleration sensor and control unit 7. The three vibration isolation assemblies are symmetrically distributed. Each vibration isolation assembly 8 is composed of a memory alloy unit 2, an inner cavity 3, an electromagnetic coil 4, a magneto-rheological damping fluid 5 and a spring 6. The memory alloy unit 2 is spaced apart from the magneto-rheological damping unit (composed of 3, 4 and 5). The outer cavity 1 is connected with an optical load support through a threaded hole. The outer cavity 1 is also made of memory alloy, and the inner cavity 3 can be a magnetic conductive material or a non-magnetic conductive material, depending on the required damping size, but needs to be a material with relatively large rigidity, so that the deformation is small when damping.
[0016] In the embodiment, the memory alloy mainly provides the rigidity of the vibration isolator. The memory alloy has the ability of shape deformation memory, so that the optical load support can restore the original position, guarantee the precision of optical effective load, the position of optical load is unchanged, and the imaging quality is not affected. The symmetric distribution of the vibration isolation assembly can realize multi-degree-of-freedom vibration isolation of the whole vibration isolation assembly. Meanwhile, the damping of the magneto-rheological damper can be adjusted according to the information of the acceleration sensor, and the spaced distribution of the memory alloy unit and the magneto-rheological damper can reduce the frequency and amplitude of vibration, and play a double vibration isolation function.
Claims
1. An optical load-variable damping adaptive vibration isolator, characterized in that, It includes (3) vibration isolation components (8), an outer cavity (1), an acceleration sensor and control unit (7), and the three vibration isolation components are symmetrically distributed.
2. The optical load variable damping adaptive vibration isolator according to claim 1, characterized in that, The vibration isolation assembly consists of a shape memory alloy unit (2), an inner cavity (3), an electromagnetic coil (4), a magnetorheological damping fluid (5), and a spring (6).
3. The optical load variable damping adaptive vibration isolator according to claim 2, characterized in that, The magnetorheological damping unit consists of an inner cavity (3), an electromagnetic coil (4), and a magnetorheological damping fluid (5). The shape memory alloy unit (2) and the magnetorheological damping unit are distributed at intervals.
4. The optical load variable damping adaptive vibration isolator according to claim 1, characterized in that, The outer cavity (1) is also made of shape memory alloy, and the inner cavity (3) can be made of magnetic or non-magnetic material, depending on the required damping.
5. The optical load variable damping adaptive vibration isolator according to claim 1, characterized in that, The outer cavity (1) is connected to the optical load holder through a threaded hole.
6. The optical load variable damping adaptive vibration isolator according to claim 1, characterized in that, The accelerometer can transmit acceleration information to the control unit, which changes the magnetorheological fluid damping by altering the magnetic field of the electromagnetic coil.