CN102867561B - High-precision displacement device for focal plane of space-borne imaging instrument - Google Patents
High-precision displacement device for focal plane of space-borne imaging instrument Download PDFInfo
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- CN102867561B CN102867561B CN201110184920.XA CN201110184920A CN102867561B CN 102867561 B CN102867561 B CN 102867561B CN 201110184920 A CN201110184920 A CN 201110184920A CN 102867561 B CN102867561 B CN 102867561B
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Abstract
The invention provides a high-precision displacement device for a focal plane of a space-borne imaging instrument. The device is used for displacing a displaced imaging sensor of an imaging instrument for celestial imaging or solar imaging to a focal plane of a camera. The device comprises a stepping motor and is characterized in that the device further comprises a worm, a hollow turbine, a cylindrical hollow internal thread sleeve and a cylindrical hollow external thread sleeve; the upper surface of the cylindrical hollow external thread sleeve constitutes an annular instrument installation platform; the hollow turbine, the cylindrical hollow internal thread sleeve and the cylindrical hollow external thread sleeve are arranged coaxially to form a hollow vertical channel, of which the diameter is greater than 15mm; the stepping motor drives the worm to rotate and the worm drives the hollow turbine engaging therewith to rotate; and the hollow turbine further drives the cylindrical hollow internal thread sleeve fixedly and coaxially arranged inside the hollow turbine to rotate synchronously, and the rotated internal thread sleeve makes the external thread sleeve sleeved on the upper part of the internal thread sleeve shift up and down under the control of a limiting mechanism through thread coupling.
Description
Technical field
The present invention relates to a kind of high precision position moving device, particularly one spaceborne Image-forming instrument focal plane high precision position moving device.
Background technology
Spaceborne Image-forming instrument is when experiencing transport, transmitting and space temperature and changing, original position can be departed from focal plane, when causing operation on orbit, image blur, so the high precision Image-forming instrument of current advanced person in-orbit all has focal plane gearshift substantially, if find image blurring, by ground remote control, imaging sensor is displaced on camera focal plane again, to obtain high-quality image.
Tens of the satellites up to this point launched only have Solar X-Ray Telescope on SOLAR-B satellite have focal plane adjustment function.On SOLAR-B satellite, the rotation of the focal plane micrometric displacement adjustment dependence control step motor of Solar X-Ray Telescope realizes, stepper motor rotating drive one connecting rod, one end of connecting rod is fixing on an imaging sensor, imaging sensor is fixed by a flexible wide metal tape, such stepper motor rotates, drive link, thus drive imaging sensor one-dimensional translation, thus realize focal plane adjustment.This focal plane displacement device structure is complicated, and volume is comparatively large, and stroke is little, and controlled range is little, development cost is high.
Summary of the invention
The object of the invention is, the focal plane displacement device structure adopted for the spaceborne Image-forming instrument overcoming prior art is complicated, and volume is comparatively large, and stroke is little, the problem that controlled range is little, development cost is high, the invention provides a kind of spaceborne Image-forming instrument focal plane high precision position moving device.
A kind of spaceborne Image-forming instrument focal plane high precision position moving device that the present invention proposes is specially for the high precision Image-forming instrument of celestial imag-ing or sun imaging, this quasi-instrument is very tight to Noise measarement, generally all need the cold noise reducing sensor of deep space spoke, be rigidly connected so imaging sensor and deep space spoke cold drawing adopt, this adds displacement control device to sensor and adds a lot of difficulty.
To achieve these goals, the invention provides a kind of spaceborne Image-forming instrument focal plane high precision position moving device, imaging sensor for the Image-forming instrument by celestial imag-ing or sun imaging that displacement occurs is displaced to camera focal plane, this device comprises stepper motor, it is characterized in that, described device also comprises: the inner thread sleeve that worm screw, hollow turbine, cylindricality are hollow and external thread sleeve; The upper surface looping apparatus installation platform that the hollow external thread sleeve of described cylindricality is; The inner thread sleeve that described hollow turbine, cylindricality are hollow and external thread sleeve are coaxially arranged, and form a hollow vertical path, the diameter of this path is greater than 15mm.
Described driving stepper motor worm screw is rotated, and this worm screw drives the hollow turbine rotation be engaged with; Described hollow turbine drives the inner hollow inner thread sleeve synchronous axial system of cylindricality be coaxially fixedly installed further, and the inner thread sleeve of this rotation makes sheathed external thread sleeve at an upper portion thereof, under position-limit mechanism controls, upper and lower displacement occur by screw thread couple.
Optionally, described hollow turbine and the hollow inner thread sleeve of cylindricality are fixed on the cylindrical stent of a hollow by a hollow thin-wall coaxial bearing, and described hollow thin-wall bearing is greater than 15mm with the diameter of the vertical hollow passage that hollow cylindrical support is formed.
Optionally, the cylindrical stent of described hollow is fixedly installed in mounting seat.
Optionally, described position-limit mechanism comprises the spacing hole of Z-shaped slide block and coupling thereof, one end of this Z-shaped slide block and apparatus installation platform Hard link, and the other end slidably coordinates with the spacing hole be vertically set on L shape frame; Described Z-shaped slide block is supported by a vertically disposed elastic supporting member for supporting optical member.Described spacing hole is rectangle spacing hole.
The course of work of the present invention is: when driving stepper motor worm screw is rotated, the hollow turbine rotation of worm drive, the hollow internal thread synchronous axial system of the cylindricality be connected with hollow turbine rigid body, this inner thread sleeve drives the external thread sleeve being sheathed on its top and apparatus installation platform one, under the restriction of position-limit mechanism, upper and lower displacement occurs further by screw thread couple.In the above-mentioned course of work, displacement accuracy is adjusted, by changing the stroke of the length adjustment displacement of the screw thread between inner thread sleeve and external thread sleeve by the pitch changing the pitch of worm screw, the number of teeth of hollow turbine or the coupled threads between inner thread sleeve and external thread sleeve.
The Advantageous Effects of a kind of spaceborne Image-forming instrument focal plane of the present invention high precision position moving device is:
1. spaceborne Image-forming instrument focal plane of the present invention high precision displacement apparatus structure have employed turbine and worm cooperation coupling precession thread mechanism and realizes sub-micrometer precision, Long Distances Bit andits control.
2., by the attributive function of turbine and worm and the position-limit mechanism of precession platform, whole device is similar to an entirety, and under the non-rotary state of motor, mounting platform can not affect the initial position of erecting bed in the impact of extraneous impulse force.
3. apparatus of the present invention structure is simple and to have cost lower, volume is little, lightweight, high reliability, and whole device can be used for the cold heat transfer web member of deep space spoke, realize the adjustment of focal plane on the one hand, meet deep space spoke cool condition on the other hand and can directly be fixed on spaceborne Image-forming instrument CCD chill surface.
The present invention be directed to the high precision Image-forming instrument of celestial imag-ing or sun imaging in sum, design the spaceborne Image-forming instrument focal plane high precision position moving device of a kind of displacement accuracy up to 0.1um.Time in orbit, by the number of drive pulses of control step motor, accurately control CCD adjusts near focal position, reaches best imaging effect.This system architecture is compact, control easy, reliability is high, anti-vibrating and impact ability is strong, heat transfer cross section is large, is the ideal device of deep space spoke cold focal plane high precision adjustment.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of spaceborne Image-forming instrument focal plane of the present invention high precision position moving device;
Fig. 2 is the sectional view of spaceborne Image-forming instrument focal plane of the present invention high precision position moving device.
Accompanying drawing identifies:
101, stepper motor 102, instrument mounting platform 103-a, worm screw
103-b, hollow turbine 104, position-limit mechanism 105, the hollow external thread sleeve of cylindricality
106, mounting seat 107, the hollow inner thread sleeve 108 of cylindricality, elastic supporting piece
201, hollow cylinder support 202, thin-wall bearing
Embodiment
Below in conjunction with the drawings and specific embodiments, one of the present invention spaceborne Image-forming instrument focal plane high precision position moving device is described in detail.
Turbine and worm driving mechanism of the present invention is driven by stepper motor 101, and worm screw 103-a is mounted and fixed on motor shaft with stepper motor 101 axle is concentric, together with the inwall of hollow turbine 103-b is closely linked in the bottom outer wall of the hollow inner thread sleeve 105 of cylindricality.The inwall of described thin-wall bearing 202 is fixed on the protruding hollow cylinder support 201 of mounting seat 106, together with the outer wall of thin-wall bearing 202 is closely linked in cylindricality hollow inner thread sleeve 107 inwall.Described position-limit mechanism 104 comprises the hardwired Z-shaped slide block of apparatus installation platform 102 and is fixed on the L bracket in mounting seat, the spacing hole that Z-shaped slide block and L bracket are arranged is slidably matched, position-limit mechanism 104 limits apparatus installation platform 102 and rotates, thus realizes apparatus installation platform 102 upper and lower displacement.There is the reducing gear such as turbine and worm and screw thread precession in this device, can realize the displacement accuracy of focal plane apparatus installation platform more than 0.1 μm.
Described turbine and worm driving mechanism, when stepper motor 101 rotates, by worm screw 103-a, rotation is passed to the hollow inner thread sleeve 107 of cylindricality, turbine and worm realizes large reduction gear ratio, limits apparatus installation platform simultaneously rotate when device does not power up; Described stepper motor 101, thin-wall bearing 202 are fixed in mounting seat 106, and the outer ring of thin-wall bearing 202 and the tight fit of the hollow inner thread sleeve of cylindricality are installed, and ensure that precession mechanism can fix and can rotate.
The hollow inner thread sleeve 107 of described thin-wall bearing 202, hollow cylindrical support 201, cylindricality and external thread sleeve 105 are coaxially arranged, form the vertical passage of a hollow, the diameter of described path is greater than 15mm, is convenient to weight reduction on the one hand, ensures that light path is passed through without blocking on the other hand.
As an embody rule of the present invention, it can meet the domestic solar X-ray developed and extreme ultraviolet telescopical out of focus high precision adjustment needs.
Fig. 1 is the general structure schematic diagram of spaceborne Image-forming instrument focal plane of the present invention high precision position moving device, as shown in Figure 1, one provided by the invention spaceborne Image-forming instrument focal plane high precision position moving device, comprising: drive motor 101, worm screw 103-a, hollow turbine 103-b, the hollow inner thread sleeve of cylindricality 107, the hollow external thread sleeve 105 of cylindricality, mounting seat 106, thin-wall bearing 202, position-limit mechanism 104, screw thread between the hollow external thread sleeve 105 of cylindricality and inner thread sleeve 107 coincide mutually, the top instrument erecting bed 102 of external thread sleeve 105 is as the mounting platform of CCD, the outer wall of the hollow inner thread sleeve of cylindricality 107 and the tight fit of hollow turbine 103-b inwall, the inwall of the hollow inner thread sleeve of cylindricality 107 and the tight fit in outer ring of thin-wall bearing 202, inwall and the hollow cylinder support 201 be fixed in the mounting seat 106 closely fit of thin-wall bearing 202, worm screw 103-a and step motor shaft are coaxially mounted with, stepper motor 101, L shape position-limited rack is all fixed in mounting seat 106.Because turbine and worm and gag lever post limit this device when motor does not rotate, whole device is in mechanical locking state, can not be subjected to displacement or rotate.
Fig. 2 is the sectional view of spaceborne Image-forming instrument focal plane of the present invention high precision position moving device, as can be seen from the figure be positioned at bottom be the hollow cylindrical support 204 of mounting seat 106 and its upper setting, described thin-wall bearing 202 is fixed on hollow cylindrical support 201 is; Inwall wringing fit bottom the outer wall of thin-wall bearing 202 and the hollow inner thread sleeve 107 of cylindricality; Outer wall bottom described inner thread sleeve 107 is connected with turbine inwall rigid body, can realize the synchronous axial system of external thread sleeve 105 and turbine; The top of described inner thread sleeve 103-b and the screw thread couple of external thread sleeve 105 inwall, apparatus installation platform 102 one at this external thread sleeve 105 and its top, when the hollow inner thread sleeve of described cylindricality 107 and hollow turbine 103-b synchronous axial system, under the restriction of position-limit mechanism 104, drive cylindricality hollow external thread sleeve 105 displacement by coupling and then drive the displacement of apparatus installation platform 102.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a spaceborne Image-forming instrument focal plane high precision position moving device, imaging sensor for the Image-forming instrument by celestial imag-ing or sun imaging that displacement occurs is displaced to camera focal plane, this device comprises stepper motor, worm screw, hollow turbine, it is characterized in that, described device also comprises: the inner thread sleeve that cylindricality is hollow and external thread sleeve; The upper surface looping apparatus installation platform that the hollow external thread sleeve of described cylindricality is; The inner thread sleeve that described hollow turbine, cylindricality are hollow and external thread sleeve are coaxially arranged, and form a hollow vertical path, the diameter of this path is greater than 15mm;
Described driving stepper motor worm screw is rotated, and this worm screw drives the hollow turbine rotation be engaged with; Described hollow turbine drives the inner hollow inner thread sleeve synchronous axial system of cylindricality be coaxially fixedly installed further, and the inner thread sleeve of this rotation makes sheathed external thread sleeve at an upper portion thereof, under position-limit mechanism controls, upper and lower displacement occur by screw thread couple.
2. spaceborne Image-forming instrument focal plane according to claim 1 high precision position moving device, it is characterized in that, described hollow turbine and the hollow inner thread sleeve of cylindricality are fixed on the cylindrical stent of a hollow by a hollow thin-wall coaxial bearing, and the inner thread sleeve that described hollow thin-wall bearing, hollow cylindrical support and above-mentioned hollow turbine, cylindricality are hollow and external thread sleeve form a hollow vertical path jointly.
3. spaceborne Image-forming instrument focal plane according to claim 2 high precision position moving device, it is characterized in that, the cylindrical stent of described hollow is fixedly installed in mounting seat.
4. spaceborne Image-forming instrument focal plane according to claim 1 high precision position moving device, it is characterized in that, described position-limit mechanism comprises the spacing hole of Z-shaped slide block and coupling thereof, one end of this Z-shaped slide block and apparatus installation platform Hard link, the other end slidably coordinates with the spacing hole be vertically set on L shape frame; Described Z-shaped slide block is supported by a vertically disposed elastic supporting member for supporting optical member.
5. spaceborne Image-forming instrument focal plane according to claim 4 high precision position moving device, it is characterized in that, described spacing hole is rectangle spacing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110184920.XA CN102867561B (en) | 2011-07-04 | 2011-07-04 | High-precision displacement device for focal plane of space-borne imaging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110184920.XA CN102867561B (en) | 2011-07-04 | 2011-07-04 | High-precision displacement device for focal plane of space-borne imaging instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102867561A CN102867561A (en) | 2013-01-09 |
| CN102867561B true CN102867561B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110184920.XA Expired - Fee Related CN102867561B (en) | 2011-07-04 | 2011-07-04 | High-precision displacement device for focal plane of space-borne imaging instrument |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802530B (en) * | 2017-02-28 | 2019-04-30 | 歌尔股份有限公司 | Focus control and camera module test device |
| CN107248328A (en) * | 2017-08-08 | 2017-10-13 | 苏州育龙科教设备有限公司 | Multimedia projection systems |
| CN108073015B (en) * | 2017-12-08 | 2020-03-13 | 中国科学院长春光学精密机械与物理研究所 | High-precision linear focusing mechanism for space camera |
| CN108613693A (en) * | 2018-04-25 | 2018-10-02 | 合肥上城信息技术有限公司 | A kind of multi-angle regulation mounting bracket for measurement and control instrument |
| CN111812912A (en) * | 2020-08-03 | 2020-10-23 | 中国科学院长春光学精密机械与物理研究所 | Focal plane image rotating mechanism |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2512424C2 (en) * | 1975-03-21 | 1982-01-14 | Jos. Schneider Gmbh & Co, Optische Werke, 6550 Bad Kreuznach | Adjustment device for photographic, cinematographic or reprographic lenses |
| JPS5652709A (en) * | 1979-10-08 | 1981-05-12 | Canon Inc | Focus control device of camera |
| CN101718946B (en) * | 2009-11-04 | 2011-03-16 | 中国科学院长春光学精密机械与物理研究所 | Image plane focusing mechanism used for push-broom type aero remote sensor |
| CN101852969A (en) * | 2010-05-24 | 2010-10-06 | 中国科学院长春光学精密机械与物理研究所 | Focusing driving mechanism for aerial camera |
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Address after: 100190 No. two south of Zhongguancun, Haidian District, Beijing 1 Patentee after: NATIONAL SPACE SCIENCE CENTER, CAS Address before: 100190 No. two south of Zhongguancun, Haidian District, Beijing 1 Patentee before: Space Science & Applied Research Centre, Chinese Academy of Sciences |
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Granted publication date: 20150318 Termination date: 20210704 |
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