CN113009663A - Supporting and connecting mechanism with dense dot matrix distribution and supporting method thereof - Google Patents
Supporting and connecting mechanism with dense dot matrix distribution and supporting method thereof Download PDFInfo
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- CN113009663A CN113009663A CN202110232861.2A CN202110232861A CN113009663A CN 113009663 A CN113009663 A CN 113009663A CN 202110232861 A CN202110232861 A CN 202110232861A CN 113009663 A CN113009663 A CN 113009663A
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Abstract
The invention discloses a supporting and connecting mechanism with dense dot matrix distribution, which comprises an installation substrate, wherein a plurality of supporting units are arranged on the installation substrate in the dense dot matrix distribution, each supporting unit comprises a displacement actuator, an output head of the displacement actuator is connected with a ball head made of a magnetic conductive material through an adapter, a space ring is arranged between the end part of the displacement actuator and the adapter, a coil which can be electrified is arranged on the outer ring of the ball head, thin permanent magnets are fixedly arranged at the positions, corresponding to the ball heads, of the bottom of an object to be supported one by one, and the thin permanent magnets and the ball heads are attracted through point contact under the action of magnetic force. The connection mode of the invention has no gap, and can completely eliminate backlash and gap errors; the two parts are in point connection, so that certain deviation is allowed to exist in the installation of the supporting mechanism, and the production and implementation are facilitated; the supporting mechanism and the supported object are connected through magnetic force, and the coupling and the separation of the supporting mechanism and the supported object can be realized by controlling the magnitude and the direction of the current of the coil.
Description
Technical Field
The invention relates to a supporting and connecting mechanism with dense lattice distribution and a supporting method thereof, which are particularly suitable for the field of supporting self-adaptive deformable mirrors and the like, which have extremely low rigidity and are extremely sensitive to supporting stress.
Background
The large-caliber self-adaptive deformable mirror is an important device in the fields of modern telescopes and lasers, the surface shape needs to be changed at high frequency during working, the working frequency is often more than hundreds of hertz, so that the thickness ratio of the deformable mirror is large, the rigidity of the deformable mirror is low, and the quality of the deformable mirror is small; meanwhile, the deformable mirror needs to be densely arranged by using a large number of actuators for correcting high-frequency atmospheric turbulence, and the number of the required actuators is dozens, hundreds or even thousands of actuators aiming at different seeing conditions, the pointing directions of the large number of actuators are difficult to be completely consistent, the pointing directions of the actuators are inconsistent, and the actuators can interfere with each other when being connected with the deformable mirror hard, so that stress is brought to the mirror surface, and meanwhile, because the rigidity of the mirror surface is very low, even if very small pointing directions are inconsistent between the actuators, the very small stress brought to the mirror surface still can bring great influence on the surface type of the self-adaptive deformable mirror.
In addition, when the adaptive deformable mirror corrects atmospheric turbulence, the driving quantity of each actuator is very small, and under the condition of typical atmospheric seeing, the correction stroke of the actuator is usually only a few micrometers, even less than 1 micrometer, so that a gap cannot exist in the connection between the actuator and the mirror surface, a certain gap usually exists in the traditional mechanical connection mode such as a bearing, and if the adaptive deformable mirror is applied to the adaptive deformable mirror, the actual stroke of the actuator can be completely submerged by the gap.
Aiming at the two problems, the connection of the adaptive deformable mirror and the actuator is as follows: must be hard-wired, there must be no gaps; secondly, the method comprises the following steps: hundreds of actuators cannot interfere with each other, otherwise, stress is brought to the mirror surface; traditional actuator and mirror surface connected mode, like figure 1, this kind of mode is generally adopting whole gluing, when the deformable mirror bore is not big, the interval is very little between the actuator, can the overall design actuator array, guarantees through technology that the actuator points to unanimously, nevertheless to heavy-calibre self-adaptation deformable mirror, after the interval grow between the actuator, this kind of mode can not satisfy the connection demand of actuator and self-adaptation deformable mirror.
Disclosure of Invention
The invention aims to solve the problems of gaps caused by a supporting structure when a large number of supporting mechanisms which are densely arranged in a lattice manner are connected with a single object and stress caused by inconsistent pointing directions of the supporting mechanisms to the supported object.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a support coupling mechanism that intensive dot matrix distributes, includes mounting substrate, a plurality of supporting element is installed in intensive dot matrix distribution on the mounting substrate, the supporting element includes displacement actuator, displacement actuator's output head passes through the adapter and is connected with the bulb that magnetic material made, be provided with the space ring between displacement actuator's tip and the adapter, adapter and space ring all adopt non-magnetic conductive material, the outer lane of bulb is provided with the coil that can let in the electric current, is provided with the thin slice permanent magnet in the bottom of treating the support object and the rigidity of bulb one-to-one, thin slice permanent magnet and bulb are through the point contact actuation under the effect of magnetic force.
Further, the object to be supported is an ultrathin self-adaptive deformable mirror.
Further, the coil is made of low-resistivity wires.
Furthermore, a large number of supporting units arranged in a dense lattice are connected or separated with a single supported object by controlling the magnitude and the direction of the current of the coil.
Further, displacement actuator's output head passes through threaded connection with the adapter, and the adapter is connected with the bulb through the screw thread of the other end simultaneously, and the screw thread clearance is all eliminated to the screw thread at adapter both ends.
Furthermore, a space ring arranged between the adapter and the output head of the displacement actuator is used for adjusting the distance between the displacement actuator and the sheet permanent magnet, the ball head and the coil, and the distance is determined by optimization, so that the magnetic field of the sheet permanent magnet and the electromagnetic field generated when the coil is electrified have no influence on the displacement actuator.
A supporting method of supporting and connecting mechanisms distributed in a dense lattice mode comprises the following steps:
slowly downward moving the object to be supported and the sheet permanent magnet along the tool to gradually approach the ball head, adjusting the magnitude of current passing through the coil in the process to enable the object to be supported and the sheet permanent magnet to be subjected to upward repulsive force, gradually reducing the current in the coil after the sheet permanent magnet approaches the ball head until the sheet permanent magnet and the ball head are completely attracted, gradually reducing the current in the coil to 0, and completing the connection of the object to be supported and a large number of supporting units which are densely distributed in a dot matrix;
when the object to be supported needs to be separated from the displacement actuator supporting device, current in the same direction as the direction in the installation process is conducted into the coil, the current is gradually increased, a magnetic field opposite to the direction of the magnetic field in the sheet permanent magnet is generated in the coil, the attraction force between the ball head and the sheet permanent magnet is gradually reduced, and the object to be supported and the sheet permanent magnet can be upwards and gradually taken out until the attraction force between the sheet permanent magnet and the ball head is gradually reduced to 0.
Compared with the prior art, the invention has the beneficial effects that:
the supporting and connecting mechanism with dense lattice distribution aims at the characteristics of large diameter-thickness ratio, light weight and extremely low self rigidity of a supported object (such as an ultrathin mirror surface and the like), and when the supporting mechanisms (such as displacement actuators) are extremely large in number and are distributed in a dense lattice mode, the supporting mechanisms in the structure are fixedly connected with the supported object through spacing rings, adapters, ball heads and sheet permanent magnets. Firstly, the method comprises the following steps: the connection mode has no gap, and the backlash and gap errors are completely eliminated; secondly, the method comprises the following steps: the two parts are in point connection, so that certain deviation is allowed to exist in the installation of the supporting mechanism, and the production and implementation are facilitated; thirdly, the method comprises the following steps: the supporting mechanism and the supported object are connected through magnetic force, and the coupling and the separation of the supporting mechanism and the supported object can be realized by controlling the magnitude and the direction of the current of the coil.
Drawings
FIG. 1 is a schematic diagram of the connection principle of an adaptive deformable mirror and a displacement actuator;
FIG. 2 is a schematic structural diagram of a mirror support connection mechanism with dense lattice distribution;
FIG. 3 is a schematic enlarged view of the mirror attachment mechanism;
FIG. 4 is a cross-sectional structural view of the ball head;
FIG. 5 is a top view of the ball head;
figure 6 is a top view block diagram of an adapter;
figure 7 is a side view block diagram of an adapter;
figure 8 is a bottom view of the adapter;
FIG. 9 is a 3D view of a typical application of a dense lattice distribution mirror support attachment mechanism.
The labels in the figure are: 1. an ultrathin self-adaptive deformable mirror; 2. a thin permanent magnet; 3. a ball head; 4. a coil; 5. an adapter; 6. a space ring; 7. an output head; 8. a displacement actuator; 9. and mounting the substrate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment provides a support and connection mechanism with dense lattice distribution as shown in fig. 1-2. The supporting and connecting mechanism comprises a mounting substrate 9, a plurality of supporting units are densely arranged on the mounting substrate 9 in a lattice distribution manner, as shown in fig. 3, each supporting unit comprises a displacement actuator 8, the displacement actuators 8 are fixedly mounted on the mounting substrate 9 and locked, the height of an output head 7 of each actuator 8 relative to the mounting substrate 9 can be adjusted through the structure, the output head 7 of each displacement actuator 8 is connected with a ball head 3 made of a magnetic conductive material through an adapter 5, the preferred structure of each ball head 3 is as shown in fig. 4-5, the preferred structure of each adapter 5 is as shown in fig. 6-8, a spacer 6 is arranged between the end of each displacement actuator 8 and each adapter 5, the adapters 5 and the spacer 6 are made of a non-magnetic conductive material, a coil 4 capable of being energized (in the embodiment, the coil 4 is preferably made of a low-resistivity wire) is arranged on the outer ring of each ball head 3, thin permanent magnets 2 are fixedly arranged, the slice permanent magnet 2 and the ball head 3 are attracted through point contact under the action of magnetic force. The support connection mechanism with dense lattice distribution is particularly suitable for being applied to the fields of extremely low rigidity and extremely sensitive to support stress, such as the support adaptive deformable mirror, and the like, so that the object to be supported in the embodiment is preferably an ultrathin adaptive deformable mirror 1, as shown in fig. 9. By controlling the magnitude and direction of the coil current, a large number of supporting units arranged in a dense lattice are connected with or separated from a single supported object.
The ball head 3 is fixedly connected with the sheet permanent magnet 2 through magnetic force, and no gap exists; the shapes of the two are simple, the processing is easy, the high precision is achieved, and the good size consistency can be achieved; the connection between the two is point contact, and the constraint exists only in one direction; the size of the sheet permanent magnet 2 can be determined through optimization, and the magnetic force between the sheet permanent magnet 2 and the ball head 3 is enough to ensure that the sheet permanent magnet 2 cannot be separated from the ball head 3 when the self-adaptive deformable mirror 1 works. When the self-adaptive deformation system does not work or is assembled, the self-adaptive mirror surface 1 and the sheet permanent magnet 2 are separated from the ball head 3 by adjusting the current in the coil 4 and can move freely.
In the structure, the supporting mechanism displacement actuator 8 is fixedly connected with the ultrathin self-adaptive deformable mirror 1 and the thin sheet permanent magnet 2 through the displacement actuator output head 7, the spacer 6, the adapter 5 and the ball head 3, and point connection is formed between the two parts, so that even if the supporting mechanism displacement actuator 7 is installed in a deviation manner, the pointing directions of the plurality of displacement actuators 7 are inconsistent, the pointing directions of the displacement actuators are still in point connection with the ultrathin self-adaptive deformable mirror 1 and the thin sheet permanent magnet 2, no lateral acting force exists, and no extra stress is brought to the ultrathin self-adaptive deformable mirror 1. The whole connecting mechanism is free of traditional bearings and other components, no gap exists, the positive and negative displacements output by the displacement actuator along the axis can be completely transmitted to the optical surface of the self-adaptive deformable mirror, and no backlash exists.
In this embodiment, the preferable connection mode is that the output head 7 of the displacement actuator 8 is fixedly connected with the displacement actuator 8, then the output head 7 of the displacement actuator 8 is connected with the adapter 5 through a thread, meanwhile, the adapter 5 is connected with the ball head 3 through a thread at the other end, and the threads at the two ends of the adapter 5 are locked through a process, so that loosening is prevented, and a thread gap is eliminated; a coil 4 is arranged on the outer ring of the ball head 3, the inner diameter of the coil 4 is slightly larger than the outer diameter of the cylinder of the ball head 3, the coil and the cylinder are in clearance fit, and the coil and the cylinder are fixedly connected through a process scheme after installation; a spacer 6 is arranged between the adapter 5 and the displacement actuator output head 7 and used for adjusting the distance between the displacement actuator 8 and the sheet permanent magnet 2, the ball head 3 and the coil 4, and the distance is determined through optimization, so that the magnetic field of the sheet permanent magnet 2 and the electromagnetic field when the coil 4 is electrified are ensured not to influence the displacement actuator 8.
In this embodiment, the ball head 3 is made of a magnetic conductive material, the adapter 5 and the spacer 6 are made of a non-magnetic conductive material, and the coil 4 is made of a low-resistivity wire. The thin permanent magnet 2, the ball head 3, the adapter 5 and the space ring 6 are simple in shape, can be processed in batches, and ensure better processing precision and consistency. The sheet permanent magnet 2 is fixedly connected with the ball head 3 through magnetic force, the connection between the sheet permanent magnet and the ball head is point contact, and the sheet permanent magnet and the ball head are restricted only in one direction; and the thin permanent magnet 2 is glued in advance to the rear surface of the mirror 1. By optimizing the size of the sheet permanent magnet 2, the magnetic force between the sheet permanent magnet 2 and the ball head 3 is ensured to be enough to ensure that the sheet permanent magnet 2 cannot be separated from the ball head 3 when the self-adaptive deformable mirror 1 works. When the self-adaptive deformation system does not work or is assembled, certain current is conducted in the coil 4, the coil 4 generates a magnetic field opposite to the direction of the magnetic field of the sheet permanent magnet 2, and therefore the magnetic force between the sheet permanent magnet 2 and the ball head 3 is reduced to a negligible value, and the self-adaptive mirror surface 1 can move freely. The overall dimensions of the coil 4, including shape, inner diameter, outer diameter, thickness and wire diameter using wire, can be determined by optimization.
In this embodiment, the thin permanent magnet 2 is fixed to the corresponding position on the rear surface of the mirror surface 1 by gluing according to the design requirements of the adaptive deformable mirror 1, so as to ensure that the magnetic field directions of the thin permanent magnet 2 are consistent and are distributed along the axial direction (for example, the N pole is on the side close to the mirror surface along the axial direction of the thin permanent magnet, and the S pole is on the side far away from the mirror surface along the axial direction of the thin permanent magnet). The ball head 3 is made of magnetic conductive material, the adapter 5 and the spacer 6 are made of non-magnetic conductive material, and the coil 4 is made of low-resistivity wire. The overall dimensions of the coil 4, including shape, inner diameter, outer diameter, thickness and wire diameter using wire, can be determined by optimization. Certain current is introduced into the coil 4, and the coil 4 generates a magnetic field opposite to the magnetic field direction of the sheet permanent magnet 2 (for example, the S pole is arranged on the side close to the mirror surface along the axial direction of the sheet permanent magnet, and the N pole is arranged on the side far away from the mirror surface along the axial direction of the sheet permanent magnet), so that the magnetic force between the sheet permanent magnet 2 and the ball head 3 is reduced to a negligible value.
The supporting method of the supporting and connecting mechanism with dense lattice distribution comprises the following steps:
slowly downward moving the object to be supported and the sheet permanent magnet 2 along the tool to gradually approach the ball head 3, adjusting the magnitude of current passing through the coil 4 in the process to enable the object to be supported and the sheet permanent magnet 2 to be subjected to upward repulsive force, gradually reducing the current in the coil 4 after the sheet permanent magnet 2 approaches the ball head 3 until the sheet permanent magnet 2 and the ball head 3 are completely attracted, gradually reducing the current in the coil 4 to 0, and completing the connection of the object to be supported and a large number of support units which are densely distributed in a dot matrix manner;
when the object to be supported needs to be separated from the displacement actuator supporting device, a current in the same direction as that in the installation process is firstly introduced into the coil 4, the current is gradually increased, a magnetic field in the direction opposite to that of the magnetic field in the sheet permanent magnet 2 is generated in the coil 4 (for example, the S pole is arranged on the side close to the mirror surface along the axial direction of the sheet permanent magnet, and the N pole is arranged on the side far from the mirror surface along the axial direction of the sheet permanent magnet), the attraction force between the ball head 3 and the sheet permanent magnet 2 is gradually reduced, and the object to be supported and the sheet permanent magnet 2 can be gradually taken out upwards after the attraction force between the sheet permanent magnet 2 and the.
In summary, the present invention relates to a mirror supporting and connecting mechanism with dense lattice distribution, which is composed of a magnet, a coil and related connecting components. The device is particularly suitable for the situation that when a large number of supporting points need to be simultaneously and rigidly connected with a single part, the deformation of the supported object caused by stress is avoided due to the mutual interference among the large number of supporting points. The supporting and connecting mechanism has no gap in connection and no backlash; no friction force exists, and stress caused by different directions of all supporting points is completely avoided; the method is particularly suitable for the fields of self-adaptive deformable mirror support and the like, which have extremely low rigidity and are extremely sensitive to support stress.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The supporting and connecting mechanism with dense lattice distribution is characterized by comprising a mounting substrate (9), a plurality of supporting units are densely arranged on the mounting substrate (9) in a lattice manner and comprise displacement actuators (8), an output head (7) of the displacement actuator (8) is connected with a ball head (3) made of magnetic conductive material through an adapter (5), a space ring (6) is arranged between the end part of the displacement actuator (8) and the adapter (5), the adapter (5) and the space ring (6) both adopt non-magnetic materials, the outer ring of the ball head (3) is provided with a coil (4) which can be connected with current, thin permanent magnets (2) are fixedly arranged at the positions corresponding to the ball heads (3) one by one at the bottom of the object to be supported, the slice permanent magnet (2) and the ball head (3) are attracted through point contact under the action of magnetic force.
2. The support connection mechanism with dense lattice distribution according to claim 1, wherein the object to be supported is an ultra-thin adaptive deformable mirror (1).
3. The dense lattice distribution support connection of claim 1, wherein the coil (4) is a low resistivity wire.
4. The supporting and connecting mechanism of dense lattice distribution as claimed in claim 1, wherein a plurality of supporting units of dense lattice arrangement are connected to or separated from a single supported object by controlling the magnitude and direction of the coil current.
5. The dense lattice distribution support connection according to claim 1, characterized in that the output head (7) of the displacement actuator (8) is connected with the adapter (5) through screw threads, and the adapter (5) is connected with the ball head (3) through screw threads at the other end, and the screw threads at both ends of the adapter (5) eliminate screw thread gaps.
6. The support connection mechanism with dense lattice distribution according to claim 1, characterized in that a spacer ring (6) is arranged between the adapter (5) and the output head (7) of the displacement actuator (8) to adjust the distance between the displacement actuator (8) and the sheet permanent magnet (2), the ball head (3) and the coil (4), and the distance is determined by optimization, so that the magnetic field of the sheet permanent magnet (2) and the electromagnetic field when the coil (4) is electrified have no influence on the displacement actuator (8).
7. A supporting method of the supporting and connecting mechanism of the dense lattice distribution as claimed in any one of claims 1 to 6, comprising:
slowly and downwards moving the object to be supported and the sheet permanent magnet (2) along the tool to gradually approach the ball head (3), adjusting the magnitude of current passing through the coil (4) in the process to enable the object to be supported and the sheet permanent magnet (2) to be subjected to upward repulsive force, gradually reducing the current in the coil (4) after the sheet permanent magnet (2) and the ball head (3) approach each other until the sheet permanent magnet (2) and the ball head (3) are completely attracted, gradually reducing the current in the coil (4) to 0, and completing the connection of the object to be supported and a large number of supporting units which are densely distributed in a dot matrix;
when the object to be supported needs to be separated from the displacement actuator supporting device, current in the same direction as the direction in the installation process is introduced into the coil (4), the current is gradually increased, a magnetic field opposite to the direction of the magnetic field in the sheet permanent magnet (2) is generated in the coil (4), the attraction force between the ball head (3) and the sheet permanent magnet (2) is gradually reduced, and the object to be supported and the sheet permanent magnet (2) can be upwards and gradually taken out until the attraction force between the sheet permanent magnet (2) and the ball head (3) is gradually reduced to 0.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220146816A1 (en) * | 2020-11-11 | 2022-05-12 | Northrop Grumman Systems Corporation | Actively deformable metamirror |
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