CN114690394B - Space long-life high-precision rotary telescopic scanning mechanism - Google Patents
Space long-life high-precision rotary telescopic scanning mechanism Download PDFInfo
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- CN114690394B CN114690394B CN202210345584.0A CN202210345584A CN114690394B CN 114690394 B CN114690394 B CN 114690394B CN 202210345584 A CN202210345584 A CN 202210345584A CN 114690394 B CN114690394 B CN 114690394B
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- Prior art keywords
- scanning
- assembly
- photoelectric encoder
- lens assembly
- rotary telescopic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 19
- 239000002360 explosive Substances 0.000 claims description 12
- 230000000977 initiatory effect Effects 0.000 claims description 12
- 230000020347 spindle assembly Effects 0.000 claims description 11
- 238000003384 imaging method Methods 0.000 claims description 10
- 239000004519 grease Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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
Abstract
A space long-life high-precision rotary telescopic scanning mechanism belongs to the technical field of precision machinery. The invention selects the high-precision photoelectric encoder as the angle sensor, directly drives the lens assembly to rotate at 360 degrees continuously and unidirectionally at a uniform speed through the torque motor, measures the rotation angle of the photoelectric encoder on the same rotating shaft and feeds back the rotation angle to the control system, improves the uniformity of the rotation speed through the closed-loop control of the control system, and solves the contradiction between low scanning resolution and large field of view of the space remote sensor.
Description
Technical Field
The invention relates to a long-life high-precision rotary telescopic scanning mechanism for a space, belongs to the technical field of precision machinery, and can be used in the long-life high-precision application field of a space optical remote sensing scanning type camera.
Background
At present, because of the limitation of the detector scale, the large-view-field imaging and the multi-detection-channel integrated camera are realized only by adopting an optical-mechanical scanning imaging mode. The large-view-field scanning imaging mainly adopts four modes: 45-degree rotary reflection scanning, swing mirror swing scanning, double-sided mirror scanning and telescope integral rotary scanning. The 45-degree rotation reflection scanning needs to eliminate image rotation, and the inhibition difficulty of stray light polarization is high. The swing mirror has small scanning breadth, and the whole aperture and the whole light path are difficult to calibrate. The double-sided mirror rotary scanning introduces external stray light, and has large polarization. Compared with the other three kinds of telescope, the telescope integrally rotates, has the advantages of no rotation, small stray light and small polarization, and can be added with a calibration source outside the scanning target range, thereby being beneficial to full-caliber full-optical path calibration in flight.
Disclosure of Invention
The invention solves the technical problems that: the defects of the prior art are overcome, and the high-precision rotary telescopic scanning mechanism with long space life is provided, the lens assembly is directly driven by the torque motor to rotate in 360 degrees continuously and unidirectionally, and meanwhile, the rotation angle of the photoelectric encoder on the scanning rotating shaft is measured and fed back to the scanning controller to finish high-precision servo control, so that the contradiction between low scanning resolution and large field of view of the space camera is solved.
The technical scheme of the invention is as follows: a space long-life high-precision rotary telescopic scanning mechanism comprises a lens assembly, a scanning support frame, a scanning main shaft assembly, an auxiliary support assembly and a fire work locking device;
one end of the lens assembly is connected with the scanning spindle assembly, and the other end of the lens assembly is connected with the auxiliary supporting assembly;
the scanning support frame is positioned between the scanning main shaft assembly and the auxiliary support assembly and is used for supporting the scanning main shaft assembly and the auxiliary support assembly;
the scanning spindle assembly is used for driving the rotary telescopic scanning mechanism in cooperation with servo control, so that the lens assembly is ensured to realize high-precision uniform scanning imaging according to instruction requirements;
the auxiliary supporting component is used for realizing auxiliary supporting of the large-span lens component through a deep groove ball bearing;
the two initiating explosive device locking devices are arranged in a radial opposite mode.
Further, the scanning spindle assembly comprises a scanning spindle, a torque motor, a motor seat, a pairing angular contact ball bearing, a bearing seat, a photoelectric encoder protection shell, a photoelectric encoder seat, a connecting flange, a bearing inner ring sealing baffle cover and a bearing outer ring sealing baffle cover;
the bearing seat is a mounting base;
the scanning main shaft is of a hollow structure; a slip ring assembly is arranged in the lens assembly, and heating and temperature measuring signals of the lens assembly are led out;
the rotor of the torque motor is fixed on the scanning spindle through a screw, and the stator of the torque motor is fixed on the motor base through a screw;
the paired angular contact ball bearings are respectively preloaded and sealed through the bearing inner ring sealing baffle cover and the bearing outer ring sealing baffle cover;
the reading head of the photoelectric encoder is fixed on the photoelectric encoder seat, and the glass grating is fixed on the scanning spindle by gluing; the circuit board of the photoelectric encoder is integrally arranged on the photoelectric encoder seat, and the reliability is improved through the backup of the two reading heads;
the photoelectric encoder protection housing is used for protecting the photoelectric encoder circuit board.
Further, the scanning main shaft is of a hollow structure; and a slip ring assembly is arranged in the lens assembly, and heating and temperature measuring signals of the lens assembly are led out.
Further, the motor base is made of aluminum-based silicon carbide, and black paint is sprayed on the outer surface of the motor base.
Further, the auxiliary supporting component comprises an auxiliary supporting rotating shaft, a deep groove ball bearing, an auxiliary supporting shaft seat and a group of bearing sealing retaining covers; the auxiliary supporting rotating shaft is connected with the lens assembly through a screw;
the deep groove ball bearing supports the auxiliary supporting rotating shaft, and the deep groove ball bearing is sealed through a group of bearing sealing blocking covers.
Furthermore, the photoelectric encoder reading head is installed by adopting a double-reading head backup.
Further, the supporting elements adopted by the scanning main shaft assembly and the auxiliary supporting assembly are grease lubrication bearings.
Further, a labyrinth seal design is employed to prevent evaporation and loss of grease.
Further, the lens component is locked through the initiating explosive locking device in the transmitting stage, so that the mechanical resistance of the transmitting stage is improved.
Furthermore, dynamic balance adjustment is performed before the lens assembly is installed, so that the influence on the imaging precision of the optical system caused by disturbance due to unbalance is reduced.
Compared with the prior art, the invention has the advantages that:
(1) The integral rotation scanning of the lens assembly has the advantages of no rotation, small stray light and small polarization;
(2) The speed uniformity of the scanning mechanism is high, and the scanning precision is high;
(3) Reliability of lens assembly in mechanical test and transmitting stage is improved through locking of firelock
Drawings
FIG. 1 is a diagram of a rotary telescopic scanning mechanism according to the present invention;
FIG. 2 is a block diagram of a scanning spindle assembly according to the present invention;
FIG. 3 is a block diagram of an auxiliary support assembly according to the present invention.
Detailed Description
In order to better understand the technical solutions described above, the following detailed description of the technical solutions of the present application is provided through the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features of the embodiments and embodiments of the present application may be combined with each other without conflict.
The following is a further detailed description of a spatial long-life high-precision rotary telescopic scanning mechanism provided in the embodiments of the present application in conjunction with the accompanying drawings of the specification, and the specific implementation manner may include (as shown in fig. 1 to 3): the high-precision rotary scanning mechanism used for the long service life of the space is directly driven by a torque motor, the high-precision photoelectric encoder is controlled in a closed loop mode, and the matched angular contact ball bearing and the deep groove ball bearing are used as supports, so that high-precision scanning under a large view field is met, and the contradiction between low scanning resolution of the space camera and the large view field is solved. The mechanical resistance of the rotary telescopic scanning mechanism is greatly improved through the locking of the firelock. The leakage and loss of bearing lubricant are reduced through the sealing design, and the service life of the space is prolonged. The disturbance caused by centrifugal force and eccentric moment caused by the unbalance amount is reduced by implementing dynamic balance on the lens assembly, so that the imaging precision of the optical system is influenced.
The rotary telescopic scanning mechanism feeds back the angle position in real time through the photoelectric encoder, and drives the torque motor to rotate along with the lens assembly 1 according to a set scanning motion rule under the action of the servo control system, so that 360-degree rotary scanning of the telescopic system in the rail passing direction around the rotating shaft is realized, and uniform scanning imaging in a large angle range is realized.
The rotary telescopic scanning mechanism comprises a lens assembly 1, a scanning support frame 2, a scanning main shaft assembly 3, an auxiliary support assembly 4 and an initiating explosive device locking device 5. The scanning main shaft assembly 3 is used for realizing the driving work of the rotary telescopic scanning mechanism in cooperation with servo control, and ensures that the lens assembly 1 realizes high-precision uniform scanning imaging according to instruction requirements. The auxiliary supporting component 4 is mainly used for realizing auxiliary supporting of the large-span lens component 1 through a deep groove ball bearing, so that the rigidity and the natural frequency of the whole main shaft system are improved, and the runout is reduced. The support elements used by the scanning spindle assembly 3 and the auxiliary support assembly 4 are grease lubricated bearings. The heavy lens assembly 1 is locked by the initiating explosive device 5 in the transmitting stage, so that the mechanical resistance of the transmitting stage is improved.
The invention selects the high-precision photoelectric encoder as the angle sensor, directly drives the lens assembly to rotate at 360 degrees continuously and unidirectionally at a uniform speed through the torque motor, measures the rotation angle of the photoelectric encoder on the same rotating shaft and feeds back the rotation angle to the control system, improves the uniformity of the rotation speed through the closed-loop control of the control system, and solves the contradiction between low scanning resolution and large field of view of the space remote sensor.
In the scheme provided by the embodiment of the application, the spatial long-life high-precision rotary telescopic scanning mechanism comprises a lens assembly 1, a scanning support frame 2, a scanning main shaft assembly 3, an auxiliary support assembly 4 and a locking device 5; the scanning main shaft assembly 3 and the auxiliary supporting assembly 4 are arranged on the main supporting frame, the scanning main shaft assembly 3 is connected with the lens assembly 1, the lens assembly 1 is directly driven to rotate in 360 degrees continuously and unidirectionally through a torque motor 32 arranged on the scanning main shaft 31, and meanwhile, the rotation angle of a photoelectric encoder 36 of the scanning main shaft 31 is measured and fed back to a scanning controller to complete high-precision servo control. The auxiliary support assembly 4 is mounted at the other end of the lens assembly 1, provides auxiliary support through the deep groove ball bearing 42, improves rigidity and natural frequency of the whole scanning system, reduces runout, improves rotation accuracy, and meanwhile reduces clamping stagnation risk of temperature deformation through the use of the deep groove ball bearing 42. The lens assembly 1 is locked by the initiating explosive device 5 in the transmitting stage, and the initiating explosive device locks an electrolytic lock after entering the rail.
The scanning spindle assembly 3 comprises a scanning spindle 31, a torque motor 32, a motor seat 33, a mating angular contact ball bearing 34, a bearing seat 35, a photoelectric encoder 36, a photoelectric encoder protective shell 37, a photoelectric encoder seat 38, a connecting flange 39, a bearing inner ring sealing baffle cover 311 and a bearing outer ring sealing baffle cover 312; the scanning main shaft 31 is of a hollow structure, a slip ring assembly 313 is arranged in the scanning main shaft, and a heating loop and a temperature measurement signal of the lens assembly 1 are led out; the rotor of the torque motor 32 is fixed on the scanning spindle 31 by a screw; the stator of the torque motor 32 is fixed on the motor base 33 through screws; the paired angular contact ball bearings are respectively preloaded and sealed through the bearing inner ring sealing baffle cover 311 and the bearing outer ring sealing baffle cover 312; the reading head 36a of the photoelectric encoder is fixed on the photoelectric encoder seat 38, and the glass grating 36b is fixed on the scanning spindle 31 by gluing; the circuit board 36c of the photoelectric encoder 36 is integrally mounted on the photoelectric encoder base 38, and the backup is realized by adopting two reading heads 36 a; the photoelectric encoder protection case 37 is used to protect the photoelectric encoder circuit board.
The auxiliary supporting component 4 comprises an auxiliary supporting rotating shaft 41, a deep groove ball bearing 42, an auxiliary supporting shaft seat 43 and a group of bearing sealing blocking covers 44; the auxiliary support rotating shaft 41 is connected with the lens assembly 1 through screws, and the auxiliary support rotating shaft 41 is supported by a deep groove ball bearing 42, and the deep groove ball bearing is sealed through a group of bearing sealing blocking covers 44.
The two initiating explosive device locking devices 5 are respectively fixed with the lens assembly 1 through screws, and the two initiating explosive device locking devices 5 are arranged in a radial opposite mode.
The invention improves the speed uniformity by carrying out closed-loop control on the rotary telescopic scanning mechanism, realizes high-precision scanning under the support of the grease lubrication bearing, and solves the contradiction between low scanning resolution and large view field of the space camera. The space emission and on-orbit environment requirements are met, a high-precision long-life scanning mechanism solution is provided, and the space emission and on-orbit environment requirements have important practical values in the field of aerospace optical remote sensors.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
What is not described in detail in the present specification is a well known technology to those skilled in the art.
Claims (9)
1. The utility model provides a rotatory telescope scanning mechanism of long-life high accuracy in space which characterized in that: the device comprises a lens assembly (1), a scanning support frame (2), a scanning main shaft assembly (3), an auxiliary support assembly (4) and an initiating explosive device locking device (5);
one end of the lens assembly (1) is connected with the scanning main shaft assembly (3), and the other end of the lens assembly is connected with the auxiliary supporting assembly (4);
the scanning support frame (2) is positioned between the scanning spindle assembly (3) and the auxiliary support assembly (4) and is used for supporting the scanning spindle assembly (3) and the auxiliary support assembly (4);
the scanning spindle assembly (3) is used for realizing driving work of the rotary telescopic scanning mechanism in cooperation with servo control, so that the lens assembly (1) can realize high-precision uniform scanning imaging according to instruction requirements;
the auxiliary supporting component (4) is used for realizing auxiliary supporting of the lens component (1) through a deep groove ball bearing;
the initiating explosive device locking devices (5) are fixed with the lens assembly (1), and the two initiating explosive device locking devices (5) are arranged in a radial opposite mode;
the scanning spindle assembly (3) comprises a scanning spindle (31), a torque motor (32), a motor seat (33), a pairing angular contact ball bearing (34), a bearing seat (35), a photoelectric encoder (36), a photoelectric encoder protective shell (37), a photoelectric encoder seat (38), a connecting flange (39), a bearing inner ring sealing baffle cover (311) and a bearing outer ring sealing baffle cover (312);
the bearing seat (35) is a mounting base;
the scanning main shaft (31) is of a hollow structure; a slip ring assembly (313) is arranged in the lens assembly, and heating and temperature measuring signals of the lens assembly are led out;
the rotor of the torque motor (32) is fixed on the scanning main shaft (31) through a screw, and the stator of the torque motor is fixed on the motor base (33) through a screw;
the paired angular contact ball bearings are respectively preloaded and sealed through a bearing inner ring sealing baffle cover (311) and a bearing outer ring sealing baffle cover (312);
the reading head (36 a) of the photoelectric encoder (36) is fixed on the photoelectric encoder seat (38), and the glass grating (36 b) is fixed on the scanning main shaft (31) through gluing; the circuit board (36 c) of the photoelectric encoder (36) is integrally arranged on the photoelectric encoder seat (38), and the reliability is improved through the backup of the two reading heads (36 a);
the photoelectric encoder protection housing (37) is used for protecting a photoelectric encoder circuit board.
2. The spatially long life high precision rotary telescopic scanning mechanism of claim 1, wherein: the scanning main shaft (31) is of a hollow structure; and a slip ring assembly (313) is arranged in the lens assembly to lead out heating and temperature measuring signals of the lens assembly.
3. The spatially long life high precision rotary telescopic scanning mechanism of claim 1, wherein: the motor base (33) is made of aluminum-based silicon carbide, and black paint is sprayed on the outer surface of the motor base.
4. The spatially long life high precision rotary telescopic scanning mechanism of claim 1, wherein: the auxiliary supporting assembly (4) comprises an auxiliary supporting rotating shaft (41), a deep groove ball bearing (42), an auxiliary supporting shaft seat (43) and a group of bearing sealing retaining covers (44); the auxiliary supporting rotating shaft (41) is connected with the lens assembly (1) through a screw;
the deep groove ball bearing (42) supports the auxiliary supporting rotating shaft (41), and the deep groove ball bearing (42) is sealed through a group of bearing sealing retaining covers (44).
5. The spatially long life high precision rotary telescopic scanning mechanism according to claim 4, wherein: the photoelectric encoder reading head (36 a) is installed by adopting a double reading head backup.
6. The spatially long life high precision rotary telescopic scanning mechanism of claim 1, wherein: the supporting elements adopted by the scanning spindle assembly (3) and the auxiliary supporting assembly (4) are grease lubrication bearings.
7. The spatially long life high precision rotary telescopic scanning mechanism according to claim 6, wherein: the labyrinth seal design is adopted to prevent volatilization and loss of grease.
8. The spatially long life high precision rotary telescopic scanning mechanism of claim 1, wherein: the lens component (1) is locked through the initiating explosive device (5) in the transmitting stage, so that the mechanical resistance of the transmitting stage is improved.
9. The spatially long life high precision rotary telescopic scanning mechanism of claim 1, wherein: dynamic balance adjustment is carried out before the lens assembly (1) is installed, so that the influence on the imaging precision of an optical system caused by disturbance due to unbalance is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210345584.0A CN114690394B (en) | 2022-03-31 | 2022-03-31 | Space long-life high-precision rotary telescopic scanning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210345584.0A CN114690394B (en) | 2022-03-31 | 2022-03-31 | Space long-life high-precision rotary telescopic scanning mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114690394A CN114690394A (en) | 2022-07-01 |
| CN114690394B true CN114690394B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210345584.0A Active CN114690394B (en) | 2022-03-31 | 2022-03-31 | Space long-life high-precision rotary telescopic scanning mechanism |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950876A (en) * | 1987-07-31 | 1990-08-21 | Olympus Optical Co., Ltd. | Optical card recording/reproducing apparatus with compensation for displacement deviation between data area of optical card and laser beam |
| CN1424591A (en) * | 2002-12-24 | 2003-06-18 | 中国科学院上海技术物理研究所 | Adaptive variable-speed scanning laser imager |
| JP2012159609A (en) * | 2011-01-31 | 2012-08-23 | Brother Ind Ltd | Optical scanner, image forming device and control program |
| CN106342270B (en) * | 2009-08-12 | 2013-06-19 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of large visual field infrared reconnaissance optical imaging system |
| CN209070117U (en) * | 2018-10-26 | 2019-07-05 | 河南中光学集团有限公司 | A kind of laser automatically scanning detection device |
-
2022
- 2022-03-31 CN CN202210345584.0A patent/CN114690394B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950876A (en) * | 1987-07-31 | 1990-08-21 | Olympus Optical Co., Ltd. | Optical card recording/reproducing apparatus with compensation for displacement deviation between data area of optical card and laser beam |
| CN1424591A (en) * | 2002-12-24 | 2003-06-18 | 中国科学院上海技术物理研究所 | Adaptive variable-speed scanning laser imager |
| CN106342270B (en) * | 2009-08-12 | 2013-06-19 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of large visual field infrared reconnaissance optical imaging system |
| JP2012159609A (en) * | 2011-01-31 | 2012-08-23 | Brother Ind Ltd | Optical scanner, image forming device and control program |
| CN209070117U (en) * | 2018-10-26 | 2019-07-05 | 河南中光学集团有限公司 | A kind of laser automatically scanning detection device |
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| Publication number | Publication date |
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| CN114690394A (en) | 2022-07-01 |
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