CN107144961B - Scanning mechanism for optical remote sensing instrument - Google Patents
Scanning mechanism for optical remote sensing instrument Download PDFInfo
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- CN107144961B CN107144961B CN201710544669.0A CN201710544669A CN107144961B CN 107144961 B CN107144961 B CN 107144961B CN 201710544669 A CN201710544669 A CN 201710544669A CN 107144961 B CN107144961 B CN 107144961B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
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- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a scanning mechanism for an optical remote sensing instrument. The device comprises a scanning mirror assembly, a scanning mechanism bracket, a driving shaft assembly, a moving shaft assembly, a film support, a bracket light blocking cover, a shaft light blocking cover and a locker protecting cover; the scanning mirror assembly comprises a scanning mirror, a glue joint bushing, a flexible support and a scanning mirror bracket; the movable shaft assembly comprises a movable half shaft, paired angular contact ball bearings, a bearing seat, a switching flange, an electromagnetic locker, a bearing locking nut and a labyrinth seal ring; the driving shaft assembly comprises a driving half shaft, paired angular contact ball bearings, a bearing seat, a driving motor, a motor shell, a magnetic shield, a circular induction synchronizer, a synchronizer protective cover, a bearing locking nut and a labyrinth sealing ring. The invention has the advantages that: the scanning speed is high and the efficiency is high; the scanning detection field of view is large; the scanning precision is high; the temperature adaptability is good; simple structure adopts direct drive, avoids using the reduction gears that the structure is complicated, has improved the reliability.
Description
Technical Field
The invention relates to the technical field of motion mechanisms of aerospace optical remote sensing instruments, in particular to a scanning mechanism for an optical remote sensing instrument.
Background
With the development of the aerospace industry, the scanning mechanism of the space optical remote sensing instrument can be widely applied due to the fact that the observation field of view can be enlarged. The existing scanning mechanism adopts an area array detector and a double-shaft scanning mode, and has long scanning period and low detection efficiency. The wind cloud No. two meteorological satellite images the ground every 60 minutes, and the new generation wind cloud No. four meteorological satellite also needs to image for 15 minutes. The scanning mechanism of the wind cloud second scanning radiometer is provided with a set of speed reducing mechanism, the structure is complex, and the assembly difficulty is high. Patent application publication No. CN103592760A proposes "a large field of view high precision optical scanning mechanism", as described in the claims 3 and 4: the structure of the speed reducer is provided with a gear speed reducing mechanism, the total speed reducing ratio of the speed reducer is 40, and the processing and assembling difficulty is increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a scanning mechanism for an optical remote sensing instrument, which can realize rapid scanning and imaging to the ground.
The invention relates to a scanning mechanism for an optical remote sensing instrument, which adopts the technical scheme that: the scanning mechanism comprises a scanning mirror assembly 2, a scanning mechanism bracket 4, a driving shaft assembly 3, a moving shaft assembly 1, a film support 5, a bracket light shield 6, a shaft light shield 7 and a locker protective cover 8;
the scanning mirror assembly 2 comprises a scanning mirror 21, a glue joint bush 22, a flexible support 23 and a scanning mirror support 24, wherein the scanning mirror 21 is supported by the back, the scanning mirror 21 and the glue joint bush 22 are bonded by optical cement, the flexible support 23 is connected with the glue joint bush 22 by a screw, and the scanning mirror support 24 is connected with the flexible support 23 by a screw;
the movable shaft assembly 1 comprises a movable half shaft 11, paired angular contact ball bearings 13, a bearing seat 12, a switching flange 14, an electromagnetic locker 15, a bearing locking nut 16 and a labyrinth seal ring 17, wherein the labyrinth seal ring 17 is respectively arranged at two ends of the paired angular contact ball bearings 13 and is locked by the bearing locking nut 16 to realize bearing pre-tightening;
the driving shaft assembly 3 comprises a driving half shaft 36, paired angular contact ball bearings 13, a bearing seat 12, a driving motor 35, a motor shell 34, a magnetic shielding cover 33, a circular induction synchronizer 32, a synchronizer protecting cover 31, a bearing locking nut 16 and a labyrinth sealing ring 17, wherein the labyrinth sealing ring 17 is respectively arranged at two ends of the paired angular contact ball bearings 13 and is locked by the bearing locking nut 16 to realize bearing pre-tightening;
the light shield 6 of the bracket is made of aluminum alloy, the outer surface of the light shield is sprayed with white paint, and the inner surface of the light shield is plated with gold, and the light shield is installed with the bracket 4 of the scanning mechanism in a heat insulation way;
the shaft light shield 7 is made of aluminum alloy, plated with gold on the surface, and is installed with the scanning mirror bracket 24 in a heat insulation way;
the scanning mirror 21 is made of silicon carbide material; the adhesive lining 22 is made of invar material with linear expansion coefficient matched with silicon carbide; the magnetic shielding cover 33 is made of pure iron or soft magnetic alloy; the scanning mechanism bracket 4 and the scanning mirror bracket 24 are both made of carbon fiber composite materials; the driving motor 35 is a dc brushless torque motor;
the bearing seat 12 of the driving shaft assembly 3 is fixedly connected with the scanning mechanism bracket 4 through an M5 screw; the bearing seat 12 of the movable shaft component 1 is firstly connected with the inner side of the film support 5 through an M5 screw, and then the outer side of the film support 5 is fixedly connected with the scanning mechanism bracket 4 through an M5 screw;
two ends of the scanning mirror bracket 24 are respectively connected with the driving half shaft 36 and the traveling half shaft 11 through M5 screws to form a rotating shaft, and the rotating shaft drives the load scanning mirror 21 to rotate and scan through a bearing;
the scanning mechanism support 4 is provided with a mechanical limit, and the moving shaft component 1 is provided with an electrical limit.
The hollow inner holes of the driving half shaft 36 and the moving half shaft 11 are attached with heating sheets to implement active temperature control.
The invention has the beneficial effects that:
1. the scanning speed is high, the efficiency is high, and the rapid scanning imaging can be realized;
2. the scanning field of view is large, the aperture of the scanning mirror can be large, and large-field-of-view scanning is realized;
3. the scanning precision is high, and the scanning precision can be better than 1 arc second by adopting a direct driving mode;
4. the temperature adaptability is good, the shafting is shielded by a light shield, the direct irradiation of sunlight is avoided, and the active temperature control is implemented by attaching a heating sheet to the inner hole of the hollow shaft, so that the shafting is in a good temperature field;
5. simple structure adopts direct drive, avoids using the harmonic speed reducer ware or the gear reduction mechanism that the structure is complicated, has improved the reliability.
Drawings
FIG. 1 is a view of a scanning mechanism;
in the figure, 1 is a traveling shaft assembly, 2 is a scanning mirror assembly, 3 is a driving shaft assembly, 4 is a scanning mechanism bracket, 5 is a film support, 6 is a bracket light shield, and 7 is a shaft light shield;
FIG. 2 is a cross-sectional view of the scanning mechanism;
in the figure, 21 is a scanning mirror, 22 is a glued bush, 23 is a flexible support, and 24 is a scanning mirror bracket;
FIG. 3 is a floating shaft assembly view;
the device comprises a bearing, a bearing seat, an electromagnetic locker, a bearing locking nut, a labyrinth sealing ring, a bearing seat, an adapter flange, an electromagnetic locker, a bearing locking nut and a labyrinth sealing ring, wherein 11 is a traveling half shaft, 12 is the bearing seat, 13 is a paired angular contact ball bearing, 14 is the adapter flange, 15 is the electromagnetic locker, 16 is the bearing locking nut and 17 is the labyrinth sealing ring;
FIG. 4 is a view of the drive shaft assembly;
the device comprises a synchronizer protective cover 31, a circular induction synchronizer 32, a magnetic shielding cover 33, a motor shell 34, a driving motor 35, a bearing seat 12, a paired angular contact ball bearing 13, a driving half shaft 36, a bearing locking nut 16 and a labyrinth sealing ring 17.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings, which are implemented on the premise of the technical solution of the present invention, and give detailed implementation manners and specific operation procedures, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the scanning mechanism of the present embodiment is composed of a scanning mirror assembly 2, a scanning mechanism bracket 4, a driving shaft assembly 3, a traveling shaft assembly 1, a film support 5, a bracket light shield 6, a shaft light shield 7 and a lock protection cover 8;
as shown in fig. 2, the scanning mirror assembly 2 includes a scanning mirror 21, a glue-bonded bush 22, a flexible support 23 and a scanning mirror support 24, the scanning mirror 21 is supported by a back support, the scanning mirror 21 and the glue-bonded bush 22 are bonded by optical cement, the flexible support 23 is connected with the glue-bonded bush 22 by a screw, and the scanning mirror support 24 is connected with the flexible support 23 by a screw;
as shown in fig. 3, the traveling shaft assembly 1 includes a traveling half shaft 11, a paired angular contact ball bearing 13, a bearing seat 12, an adapter flange 14, an electromagnetic locker 15, a bearing lock nut 16 and a labyrinth seal 17, wherein the labyrinth seal 17 is respectively installed at two ends of the paired angular contact ball bearing 13 and is locked by the bearing lock nut 16 to realize bearing pre-tightening;
as shown in fig. 4, the driving shaft assembly 3 includes a driving half shaft 36, a pair of angular contact ball bearings 13, a bearing seat 12, a driving motor 35, a motor housing 34, a magnetic shield 33, a circular induction synchronizer 32, a synchronizer protective cover 31, a bearing lock nut 16 and a labyrinth seal 17, wherein the labyrinth seal 17 is respectively installed at two ends of the pair of angular contact ball bearings 13 and is locked by the bearing lock nut 16 to realize bearing pre-tightening;
the bearing seat 12 of the driving shaft assembly 3 is fixedly connected with the scanning mechanism bracket 4 through an M5 screw; the bearing seat 12 of the movable shaft component 1 is firstly connected with the inner side of the film support 5 through an M5 screw, and then the outer side of the film support 5 is fixedly connected with the scanning mechanism bracket 4 through an M5 screw;
the two ends of the scanning mirror bracket 24 are respectively connected with the driving half shaft 36 and the traveling half shaft 11 through M5 screws to form a rotating shaft, and the rotating shaft drives the load scanning mirror 21 to rotate and scan through a bearing.
The scanning mechanism manufactured according to the invention passes the assessment of the mechanical test, the thermal vacuum test and other environmental tests along with the satellite overall, and the performance meets the requirements.
Claims (2)
1. The utility model provides a scanning mechanism for optical remote sensing instrument, includes scanning mirror assembly (2), scanning mechanism support (4), drive shaft subassembly (3), axle subassembly (1) that moves about, film support (5), support light shield (6), axle light shield (7) and locker safety cover (8), its characterized in that:
the scanning mirror assembly (2) comprises a scanning mirror (21), a glue joint bush (22), a flexible support (23) and a scanning mirror bracket (24), the scanning mirror (21) is supported by the back, the scanning mirror (21) is bonded with the glue joint bush (22) through optical glue, the flexible support (23) is connected with the glue joint bush (22) through a screw, and the scanning mirror bracket (24) is connected with the flexible support (23) through a screw;
the moving shaft assembly (1) comprises a moving half shaft (11), paired angular contact ball bearings (13), a bearing seat (12), an adapter flange (14), an electromagnetic locker (15), a bearing locking nut (16) and a labyrinth seal ring (17), wherein the labyrinth seal ring (17) is respectively arranged at two ends of the paired angular contact ball bearings (13) and is locked by the bearing locking nut (16) to realize bearing pre-tightening;
the driving shaft assembly (3) comprises a driving half shaft (36), paired angular contact ball bearings (13), a bearing seat (12), a driving motor (35), a motor shell (34), a magnetic shield cover (33), a round induction synchronizer (32), a synchronizer protective cover (31), a bearing locking nut (16) and a labyrinth seal ring (17), wherein the labyrinth seal ring (17) is respectively arranged at two ends of the paired angular contact ball bearings (13) and is locked by the bearing locking nut (16) to realize bearing pre-tightening;
the light blocking cover (6) of the bracket is made of aluminum alloy, the outer surface of the light blocking cover is sprayed with white paint, and the inner surface of the light blocking cover is plated with gold, and the light blocking cover and the scanning mechanism bracket (4) are installed in a heat-insulating way;
the shaft light shield (7) is made of aluminum alloy, plated with gold on the surface, and is installed with the scanning mirror bracket (24) in a heat insulation way;
the scanning mirror (21) is made of silicon carbide material; the cementing bush (22) is made of invar steel material with linear expansion coefficient matched with silicon carbide; the magnetic shielding cover (33) is made of pure iron or soft magnetic alloy; the scanning mechanism bracket (4) and the scanning mirror bracket (24) are both made of carbon fiber composite materials; the driving motor (35) is a direct-current brushless torque motor;
a bearing seat (12) of the driving shaft assembly (3) is fixedly connected with the scanning mechanism bracket (4) through an M5 screw; a bearing seat (12) of the movable shaft component (1) is firstly connected with the inner side of the film support (5) through an M5 screw, and then the outer side of the film support (5) is fixedly connected with the scanning mechanism bracket (4) through the M5 screw;
two ends of the scanning mirror bracket (24) are respectively connected with the driving half shaft (36) and the traveling half shaft (11) through M5 screws to form a rotating shaft, and the rotation is realized through a bearing to drive the load scanning mirror (21) to rotate and scan;
the scanning mechanism support (4) is provided with a mechanical limit, and the moving shaft assembly (1) is provided with an electrical limit.
2. A scanning mechanism for an optical remote sensing instrument according to claim 1, characterized in that: hollow inner holes of the driving half shaft (36) and the traveling half shaft (11) are attached with heating sheets to implement active temperature control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710544669.0A CN107144961B (en) | 2017-07-06 | 2017-07-06 | Scanning mechanism for optical remote sensing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710544669.0A CN107144961B (en) | 2017-07-06 | 2017-07-06 | Scanning mechanism for optical remote sensing instrument |
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| Publication Number | Publication Date |
|---|---|
| CN107144961A CN107144961A (en) | 2017-09-08 |
| CN107144961B true CN107144961B (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710544669.0A Active CN107144961B (en) | 2017-07-06 | 2017-07-06 | Scanning mechanism for optical remote sensing instrument |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791963A (en) * | 2018-06-15 | 2018-11-13 | 上海卫星工程研究所 | Suitable for rotating unit low-power consumption thermal compensation device and method outside star |
| CN110941084B (en) * | 2019-12-19 | 2021-04-09 | 中国科学院长春光学精密机械与物理研究所 | Satellite-borne scanning mechanism |
| CN111856734B (en) * | 2020-08-07 | 2022-07-05 | 北京中创为南京量子通信技术有限公司 | Card type lens for free space quantum communication and quantum key distribution system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270651A (en) * | 1968-04-01 | 1972-04-12 | Hawker Siddeley Dynamics Ltd | Improvements in or relating to optical scanning equipment |
| CN103471566A (en) * | 2013-08-23 | 2013-12-25 | 北京空间机电研究所 | Scanning mechanism applied to aerial camera |
| CN103592760A (en) * | 2013-10-28 | 2014-02-19 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field high-precision optical scanning mechanism |
| CN207008187U (en) * | 2017-07-06 | 2018-02-13 | 中国科学院上海技术物理研究所 | Sweep mechanism for optical remote sensing instrument |
-
2017
- 2017-07-06 CN CN201710544669.0A patent/CN107144961B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270651A (en) * | 1968-04-01 | 1972-04-12 | Hawker Siddeley Dynamics Ltd | Improvements in or relating to optical scanning equipment |
| CN103471566A (en) * | 2013-08-23 | 2013-12-25 | 北京空间机电研究所 | Scanning mechanism applied to aerial camera |
| CN103592760A (en) * | 2013-10-28 | 2014-02-19 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field high-precision optical scanning mechanism |
| CN207008187U (en) * | 2017-07-06 | 2018-02-13 | 中国科学院上海技术物理研究所 | Sweep mechanism for optical remote sensing instrument |
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| CN107144961A (en) | 2017-09-08 |
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