CN105527690B - A kind of two-dimentional executing agency of integration adjusted applied to space optical camera focal plane - Google Patents
A kind of two-dimentional executing agency of integration adjusted applied to space optical camera focal plane Download PDFInfo
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- CN105527690B CN105527690B CN201610058503.3A CN201610058503A CN105527690B CN 105527690 B CN105527690 B CN 105527690B CN 201610058503 A CN201610058503 A CN 201610058503A CN 105527690 B CN105527690 B CN 105527690B
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- focal plane
- stepper motor
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- shift fork
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Abstract
The present invention relates to a kind of two-dimentional executing agency of integration adjusted applied to space optical camera focal plane, including：Focus unit and bias current adjusting unit；Wherein, focus unit includes：Eccentric shaft, stepper motor, worm screw, worm gear, worm screw case bearing, take-up housing, encoder support, focusing encoder, focusing pedestal and mechanism housing；Bias current adjusting unit includes：Worm screw, lead screw shaft, worm gear, pedestal, shift fork, tuningout stream encoder, optical axis, nut and stepper motor, shift fork seat, focal plane, focusing pedestal.The present invention's is applied to the two-dimentional executing agency of integration that space optical camera focal plane is adjusted, and the integrative development of optical sensor is promoted, to realize that space product develops offer technical support to integrated direction.
Description
Technical field
The invention belongs to space optical remote technical field, and in particular to one kind is applied to the adjustment of space optical camera focal plane
The two-dimentional executing agency of integration.
Background technology
Space optical camera needs focusing plane to carry out two-dimension adjustment when taking pictures, i.e. focusing and bias current adjusting, and main function is：
When remote sensor is shot to target area, the compensation of focal plane defocusing amount and high accuracy are realized by the micro movement of focal plane and rotation
IMC, target area is imaged on CCD photosurface exactly, and is occupied little space, light weight, and is had enough
Intensity, rigidity, good self-locking property and anti-cold welding performance.
Closest prior art is Changchun Institute of Optics, Fine Mechanics and Physics, CAS's bavin with the present invention
Fang Mao et al. is published in《Photoelectric project》The two-dimentional accurate adjusting mechanism research of focal plane on periodical, the focus adjusting mechanism is applied to big mouth
Footpath, the high resolution space optical remote sensor engineering project of long-focus.As shown in Fig. 1, Fig. 2 and Fig. 3, the mechanism is main by focal plane
Vertical movement driving, focal plane rotary motion driving and focal plane and its part of supporting construction three composition.Wherein focal plane vertical movement is driven
Dynamic part includes stepper motor 100, focal plane support base 200, guide rail 300, focusing pedestal 400, eccentric shaft 500, encoder 600；
Focal plane rotary motion drive part includes encoder 700, ball-screw 800, linear bearing 900, stepper motor 1000, bias current adjusting
Base 1100；Focal plane and its supporting construction part include focal plane and its supporting mechanism 1200.The drive division moved vertically in focal plane
Point, stepper motor 100 is connected with eccentric shaft 500, so that stepper motor 1000 is converted into eccentric shaft 500 radial direction
Linear motion, encoder 600 is arranged on the end of eccentric shaft 500, for detecting and controlling the precision of motion.Structure integral installation
On focusing pedestal 400.Eccentric shaft 500 drives focal plane support base 200 and focal plane 1200 to do vertical line fortune by guide rail 300
It is dynamic, so as to realize the purpose of focusing.
In the drive part of focal plane rotary motion, stepper motor 1000 is connected with ball-screw 800, so that stepping is electric
The linear motion being converted into along the axial direction of ball-screw 800 of machine 1000, encoder 700 is arranged on the end of ball-screw 800
Portion.Whole drive part is fixed on bias current adjusting base 1100.Ball-screw 800 coordinates with linear bearing 900, will move along a straight line
The rotation around optical axis direction is converted into, so as to realize the purpose of bias current.The core of focal plane supporting construction 1200 be it is a set of high accuracy,
The ball spline of high rigidity and high intensity, its own can realize two dimensional motion, thus by focal plane move vertically driving structure and
Focal plane rotary motion driving structure is organically integrated into a whole.
The shortcoming of the focus adjusting mechanism is：Rigidity is not high, and bearing capacity is poor and is only suitable for being applied to the sky of small size focal plane
Between camera.
The content of the invention
In order to overcome the defect that prior art is present, it is inclined that the present invention proposes that one kind can solve space optical remote sensor focusing
The high accuracy of the two-dimentional executing agency of stream, can self-locking, low weight, high rigidity, heavy load problem, applied to space optical camera Jiao
The two-dimentional executing agency of integration of face adjustment.
In order to solve the above-mentioned technical problem, technical scheme is specific as follows：
A kind of two-dimentional executing agency of integration adjusted applied to space optical camera focal plane, including：Focus unit and tune
Bias current unit；Wherein,
Focus unit includes：Eccentric shaft, stepper motor, worm screw, worm gear, worm screw case bearing, take-up housing, encoder support,
Focusing encoder, focusing pedestal and mechanism housing；
Bias current adjusting unit includes：Worm screw, lead screw shaft, worm gear, pedestal, shift fork, tuningout stream encoder, optical axis, nut and step
Stepper motor, shift fork seat, focal plane, focusing pedestal；
In focus unit, focusing encoder is arranged on the end of eccentric shaft；Whole drive part by worm screw case bearing,
Take-up housing, encoder support are fixed on mechanism housing, and mechanism housing is connected with focusing pedestal；
In bias current adjusting unit, tuningout stream encoder is arranged on the end of lead screw shaft；Lead screw shaft is driven by screw-driven
Nut is translated in lead screw shaft；It is parallel on nut that one optical axis is installed with lead screw shaft；Driving structure entirely through pedestal with focusing
Pedestal is connected；Connection shift fork seat, shift fork seat and Jiao outside shift fork, the movement of the translation drive shift fork of nut, shift fork are installed on nut
Face is connected.
In the above-mentioned technical solutions, in focus unit, stepper motor is connected with worm screw, and worm and wheel engagement is passed
Dynamic, worm gear coordinates with eccentric shaft, by the linear motion being converted into along eccentric shaft radial of stepper motor.
In the above-mentioned technical solutions, in bias current adjusting unit, stepper motor is connected with worm screw, and worm and wheel engagement is passed
Dynamic, worm gear coordinates with screw axis, by the rotation for being converted into lead screw shaft of stepper motor.
In the above-mentioned technical solutions, stepper motor is army's grade four phase step motor.
The present invention has following beneficial effect：
The present invention's is applied to the two-dimentional executing agency of integration and the technology phase before that space optical camera focal plane is adjusted
Than, the problem of rigidity of structure is low, bearing capacity is poor is solved, and be suitably applied in large scale focal plane spatial camera, it is
High-quality image is obtained there is provided technical guarantee.
The present invention's is applied to the two-dimentional executing agency of integration that space optical camera focal plane is adjusted, focus unit and tuningout
Stream unit becomes an entirety, and more compact structure, space-consuming is smaller, and positioning precision is high, it is easy to debug.
The present invention's is applied to the two-dimentional executing agency of integration that space optical camera focal plane is adjusted, and promotes optical remote sensing
The integrative development of device, to realize that space product develops offer technical support to integrated direction.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the focus drive section separation structure schematic diagram of the two-dimentional accurate adjusting mechanism of focal plane of prior art；
Fig. 2 is the bias current adjusting drive part structural representation of the two-dimentional accurate adjusting mechanism of focal plane of prior art；
Fig. 3 is the general structure schematic diagram of the two-dimentional accurate adjusting mechanism of focal plane of prior art；
Fig. 4 is the focus unit structural representation in the two-dimentional executing agency of integration of the present invention；
Fig. 5 is the bias current adjusting cellular construction schematic diagram in the two-dimentional executing agency of integration of the present invention；
Fig. 6 is the general structure schematic diagram of the two-dimentional executing agency of integration of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Fig. 4, Fig. 5 and Fig. 6, of the invention is applied to the integration two dimension execution that space optical camera focal plane is adjusted
Mechanism is mainly made up of focus unit and bias current adjusting unit two parts.Wherein focus unit includes eccentric shaft 8, stepper motor 7, snail
Bar 6, worm gear 5, worm screw case bearing 4, take-up housing 3, encoder support 2, focusing encoder 1, focusing pedestal (bias current adjusting base) 20
With mechanism housing 21；Bias current adjusting unit includes worm screw 9, lead screw shaft 10, worm gear 11, pedestal 12, shift fork 13, tuningout stream encoder
14th, optical axis 15, nut 16 and stepper motor 17, shift fork seat 18, focal plane 19, focusing pedestal (bias current adjusting base) 20.It is single in focusing
In member, stepper motor 7 is connected with worm screw 6, and worm screw 6 and the engaged transmission of worm gear 5, worm gear 5 coordinate with eccentric shaft 8, so that will step
The linear motion being converted into along the radial direction of eccentric shaft 8 of stepper motor 7, focusing encoder 1 is arranged on the end of eccentric shaft 8.It is whole
Individual drive part is fixed on mechanism housing 21 by worm screw case bearing 4, take-up housing 3, encoder support 2, mechanism housing 21 with
Focusing pedestal 20 is connected, and final motor is converted into vertical movement of the focal plane along line slideway direction, reaches the mesh of focusing
's.In bias current adjusting unit, stepper motor 17 is connected with worm screw 9, worm screw 9 and the engaged transmission of worm gear 11, worm gear 11 and screw mandrel
Axle 10 coordinates, so that by the rotation for being converted into lead screw shaft 10 of stepper motor 17, tuningout stream encoder 14 is arranged on leading screw
The end of axle 10.Lead screw shaft 10 drives nut 16 to be translated in lead screw shaft 10 by screw-driven.Parallel and leading screw on nut 16
Axle 10 installs an optical axis 15, for ensureing the stabilization and precision of bias current adjusting mechanism.Driving structure entirely through pedestal 12 with adjust
Burnt pedestal (bias current adjusting base) 20 connects.Shift fork 13 is installed, the translation of nut 16 drives the movement of shift fork 13, shift fork on nut 16
13 outer connection shift fork seats 18, shift fork seat 18 is connected with focal plane 19, so as to realize the rotary motion of focal plane 19, reaches the mesh of bias current adjusting
's.Pedestal 20 of focusing is both the pedestal of focus adjusting mechanism and the base of tuningout flow structure, and focus unit and bias current adjusting unit turn into
One entirety, more compact structure, space-consuming is smaller, and positioning precision is high, it is easy to debug.
Operation principle explanation：Focus adjusting mechanism and bias current adjusting mechanism are so necessarily caused generally using each independent structure
Space-consuming is big, quality weight, the problems such as debuging difficulty.The requirement to focus adjusting mechanism and bias current adjusting mechanism and hair according to optical camera
Show shape, the present invention selects the two-dimentional executing agency of focusing bias flow, and will focus to design with bias current adjusting Liang Tao mechanisms is combined into one
Integrated model, reduces volume, reduces weight, and focusing and bias current adjusting two dimensional motion are non-interference.
The present invention proposes worm and gear-eccentric shaft mechanism and worm and gear-screw-nut body.In focus unit, step
Stepper motor drives eccentric shaft by worm gear, makes to be connected to the component radial direction translation on eccentric shaft, and then drive focusing component edge
Line slideway axially reciprocating, so as to reach the purpose of focusing.In bias current adjusting unit, stepper motor drives silk by worm gear
Thick stick axle, makes to be connected to the nut on leading screw along leading screw axial translation, and then drives the shift fork motion on nut, bias current adjusting component quilt
Shift fork drives and rotated along optical axis direction, so as to reach the purpose of bias current adjusting.Focusing base in mechanism is both focus unit
Execution unit is also a part for bias current adjusting unit so that mechanism is compacter, also solves general structure rigidity not enough, carrying
The problem of ability.The scheme used cooperatively using worm and gear-lead screw shaft/eccentric shaft-linear bearing, makes the precision of structure big
Big to improve, the size of whole system is reduced, and is that space camera develops there is provided convenient to integrated direction.Due to using snail
Wheel set drives lead screw shaft and eccentric shaft turns, therefore the structure not only has auto-lock function, and stepper motor is made into further again
Subdivision, can ignore stepper motor and lose influence of the step to MECHANISM PRECISION on a small quantity；Lead screw shaft is used cooperatively with optical axis and straight line sliding sleeve,
The stability of mechanism is improved, the shaking volume of focal plane is reduced, and solves the stuck problem of the structure under high and low temperature environment.
High-precision straight line sliding sleeve and lead screw shaft have been selected in the mechanism, it is right after installation with higher linearity and the depth of parallelism
The mechanism carries out the running adaptation repeatedly of certain time, break-in is carried out to corresponding transmission mechanism, so as to ensure that machine in use
The smoothness and stability of structure motion.
Technical scheme of the present invention as shown in Fig. 4-6 is implemented.Wherein, stepper motor uses army's grade four phase step motor；
The structural members such as focusing encoder, tuningout stream encoder, worm gear, eccentric shaft, lead screw shaft and focusing pedestal are logical for the art
Use product；The high-precision space flight level linear bearing that linear bearing is, overall structure material uses titanium alloy material, and weight is
12Kg, mechanism physical size requirements are 330mm × 308mm × 253.1mm, and focal plane total travel shaking volume is better than 10 ", positioning precision
Better than 0.005mm, backlash is better than 0.01mm.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (4)
1. a kind of two-dimentional executing agency of integration adjusted applied to space optical camera focal plane, it is characterised in that including：Focusing
Unit and bias current adjusting unit；Wherein,
Focus unit includes：Eccentric shaft (8), the first stepper motor (7), the first worm screw (6), the first worm gear (5), worm screw case bearing
(4), take-up housing (3), encoder support (2), focusing encoder (1), focusing pedestal (20) and mechanism housing (21)；
Bias current adjusting unit includes：Second worm screw (9), lead screw shaft (10), the second worm gear (11), pedestal (12), shift fork (13), tuningout
Stream encoder (14), optical axis (15), nut (16) and the second stepper motor (17), shift fork seat (18), focal plane (19), focusing pedestal
(20)；
In focus unit, focusing encoder (1) is arranged on the end of eccentric shaft (8)；Whole drive part passes through worm screw case branch
Seat (4), take-up housing (3), encoder support (2) are fixed on mechanism housing (21), mechanism housing (21) and focusing pedestal (20)
Connection；
In bias current adjusting unit, tuningout stream encoder (14) is arranged on the end of lead screw shaft；Lead screw shaft (10) passes through screw-driven
Nut (16) is driven to be translated in lead screw shaft (10)；It is parallel on nut (16) that an optical axis (15) is installed with lead screw shaft (10)；Driving
Structure entirely through pedestal (12) with focusing pedestal (20) be connected；Shift fork (13) is installed on nut (16), nut (16) it is flat
Shipper pole moves the movement of shift fork (13), and shift fork (13) connects shift fork seat (18) outside, and shift fork seat (18) is connected with focal plane (19).
2. the integration two-dimentional executing agency according to claim 1 adjusted applied to space optical camera focal plane, it is special
Levy and be, in focus unit, the first stepper motor (7) is connected with the first worm screw (6), the first worm screw (6) and the first worm gear
(5) engaged transmission, the first worm gear (5) coordinates with eccentric shaft (8), and the rotation of the first stepper motor (7) is converted into along eccentric shaft
(8) linear motion of radial direction.
3. the integration two-dimentional executing agency according to claim 1 adjusted applied to space optical camera focal plane, it is special
Levy and be, in bias current adjusting unit, the second stepper motor (17) is connected with the second worm screw (9), the second worm screw (9) and the second snail
(11) engaged transmission is taken turns, the second worm gear (11) coordinates with screw axis (10), and the rotation of the second stepper motor (17) is converted into silk
The rotation of thick stick axle (10).
4. the integration two-dimentional executing agency according to claim 1 adjusted applied to space optical camera focal plane, it is special
Levy and be, the first stepper motor (7) and the second stepper motor (17) are respectively army's grade four phase step motor.
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| CN108562990B (en) * | 2017-12-20 | 2020-08-14 | 北京空间机电研究所 | Focusing mechanism suitable for large-span and large-load |
| CN108681024B (en) * | 2018-06-08 | 2023-12-08 | 中国科学院西安光学精密机械研究所 | Moving target surface focusing mechanism and target surface inclination amount and visual axis runout detection method thereof |
| CN109581610B (en) * | 2018-12-29 | 2021-01-15 | 中国科学院长春光学精密机械与物理研究所 | Focusing mechanism |
| CN112099288B (en) * | 2020-09-30 | 2021-08-24 | 长光卫星技术有限公司 | Space camera focusing mechanism applied to conjugated double focal planes |
| CN116449522B (en) * | 2023-04-17 | 2024-02-20 | 之江实验室 | Focusing optical system eccentric assembly, tilting assembly and focal plane assembly precise adjustment structure and method |
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| GB190423458A (en) * | 1904-02-01 | 1904-12-01 | Krupp Ag | Improvements in or connected with Sighting-telescopes. |
| GB576972A (en) * | 1944-01-05 | 1946-04-30 | Houghton Butcher Mfg Co Ltd | Improvements in or relating to aerial photography |
| CN102063127B (en) * | 2010-12-15 | 2012-09-19 | 中国科学院长春光学精密机械与物理研究所 | Bidirectional-screw bias current adjusting mechanism |
| CN104635317A (en) * | 2015-02-11 | 2015-05-20 | 中国科学院长春光学精密机械与物理研究所 | Light coaxial three-reflector spatial optical remote sensor structure |
| CN104991569B (en) * | 2015-05-22 | 2017-10-31 | 中国科学院长春光学精密机械与物理研究所 | A kind of arc guide rail space camera bias current adjustment mechanism |
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Address after: No. 1299, Mingxi Road, Beihu science and Technology Development Zone, Changchun City, Jilin Province Patentee after: Changguang Satellite Technology Co.,Ltd. Address before: 130032 No. 1759, Mingxi Road, Gaoxin North District, Changchun City, Jilin Province Patentee before: CHANG GUANG SATELLITE TECHNOLOGY Co.,Ltd. |