Double-reflector optical scanning turntable

Abstract

The invention belongs to the field of aerospace, and particularly relates to a double-reflector optical scanning rotary table. According to the invention, a larger light scanning angle in a limited load space is realized by arranging the scanning reflecting mirror with an adjustable pitch angle and assisting with the fixed reflecting mirror; furthermore, a fixed reflector framework with an adjustable pitch angle and a combination of various reflector surfaces are provided, so that a larger scanning range is realized, and the response sensitivity requirement of a subsequent signal processing system is reduced. In a limited layout space, the problems that the scanning view field of a traditional single-reflector scanning rotary table is reduced, the scanning area is reduced, and the corresponding space area scanning task cannot be completed are solved.

Description

Technical Field

[0001] The invention belongs to the field of aerospace, and in particular relates to a double-mirror optical scanning turntable. Background Art

[0002] In aerospace optical detection equipment, an optical scanning turntable is usually used to complete scanning detection tasks in space areas. However, existing optical scanning turntables are usually in the form of single mirror scanning, which has the disadvantage of occupying a large payload space when completing space area scanning tasks. This results in the single mirror scanning turntable being unable to complete the scanning task of the corresponding space area within a limited layout space. Summary of the invention

[0003] In view of the above-mentioned problems or shortcomings, and to solve the problem that the single-mirror scanning turntable of existing aerospace optical detection equipment cannot complete the corresponding scanning task within the limited layout space, the present invention provides a dual-mirror optical scanning turntable, which realizes a wider-angle scanning detection range through the combined use of dual mirrors.

[0004] A dual-mirror optical scanning turntable, characterized in that it includes an azimuth fixed seat (1), an azimuth axis (2), an azimuth bearing (3), an azimuth motor (4), an azimuth turntable (5), an azimuth encoder (6), an azimuth bearing pressure ring (7), a pitch fixed seat (8), a pitch axis (9), a pitch bearing (10), a pitch motor (11), a scanning reflector adapter (12), a scanning reflector (13), a fixed reflector (14), a pitch axis cover (15), a pitch encoder (16), a pitch encoder adapter (17) and a pitch bearing pressure ring (18).

[0005] The scanning reflector (13) is connected to the pitch axis (9) via a scanning reflector adapter (12); the pitch axis (9) is connected to the pitch fixing seat (8) via a pitch bearing (10); the pitch fixing seat (8) is connected to the azimuth turntable (5); the pitch motor (11) is connected to the pitch fixing seat (8) via its stator; the pitch motor (11) is connected to the pitch axis (9) via its rotor; the pitch motor (11) drives the scanning reflector (13) via the pitch axis (9) to achieve pitch rotation.

[0006] The fixed reflector (14) is connected to the azimuth turntable (5), and the azimuth turntable (5) is connected to the azimuth axis (2); the azimuth motor (4) is connected to the azimuth fixed seat (1) through its stator, and the azimuth motor (4) is connected to the azimuth axis (2) through its rotor; the azimuth motor (4) drives the azimuth turntable (5) through the azimuth axis (2) to realize the rotation of the entire scanning turntable in the horizontal direction.

[0007] The scanning reflector (13) reflects the collected external light to the fixed reflector (14), and then the light is reflected again to the subsequent signal processing system by the fixed reflector (14).

[0008] Furthermore, the scanning reflector (13) is a convex mirror to further expand the scanning range.

[0009] Furthermore, the fixed reflector (14) is connected to the azimuth turntable (5) in a fixed connection mode with an adjustable pitch angle, so as to further expand the scanning range.

[0010] Furthermore, the fixed reflector (14) is a concave mirror, which cooperates with the pitch angle adjustment of the azimuth turntable (5) to improve the response sensitivity of the subsequent signal processing system.

[0011] Furthermore, the fixed reflector (14) is a convex mirror, which cooperates with the pitch angle adjustment of the azimuth turntable (5) to further expand the scanning range.

[0012] The above-mentioned dual-mirror optical scanning turntable has a specific working process as follows: the servo control system controls the azimuth motor (4) and the pitch motor (11) through the azimuth encoder (6) and the pitch encoder (16) to respectively drive the azimuth axis (2) and the pitch axis (9) to move, so that the entire turntable can achieve a high-precision scanning task within a rated range.

[0013] In summary, the present invention achieves a larger light scanning angle in a limited load space by providing a scanning reflector (13) with an adjustable pitch angle, and then supplemented by a fixed reflector (14); and further provides a fixed reflector (14) architecture with an adjustable pitch angle and a combination of multiple reflector surfaces, so as to achieve a larger scanning range and reduce the response sensitivity requirements of the subsequent signal processing system. The present invention overcomes the problem that the existing single reflector scanning turntable cannot complete the corresponding scanning task. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0015] Figure 2 is a schematic structural diagram of a scanning reflector adapter 12 of an embodiment;

[0016] Figure 3 is a schematic structural diagram of a scanning reflector in an embodiment;

[0017] Figure 4 It is a schematic diagram of the structure of fixing the reflector in the embodiment;

[0018] Figure 5 It is a structural schematic diagram of an existing single-mirror scanning turntable.

[0019] Figure markings: 1-azimuth fixing seat, 2-azimuth axis, 3-azimuth bearing, 4-azimuth motor, 5-azimuth turntable, 6-azimuth encoder, 7-azimuth bearing pressure ring, 8-pitch fixing seat, 9-pitch axis, 10-pitch bearing, 11-pitch motor, 12-scanning reflector adapter, 13-scanning reflector, 14-fixed reflector, 15-pitch axis cover, 16-pitch encoder, 17-pitch encoder adapter, 18-pitch bearing pressure ring. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the embodiments.

[0021] A dual-mirror optical scanning turntable, such as Figure 1 As shown, it includes an azimuth fixing seat (1), an azimuth axis (2), an azimuth bearing (3), an azimuth motor (4), an azimuth turntable (5), an azimuth encoder (6), an azimuth bearing pressure ring (7), a pitch fixing seat (8), a pitch axis (9), a pitch bearing (10), a pitch motor (11), a scanning reflector adapter (12), a scanning reflector (13), a fixed reflector (14), a pitch axis cover plate (15), a pitch encoder (16), a pitch encoder adapter (17) and a pitch bearing pressure ring (18).

[0022] The double-reflector optical scanning turntable is provided with two types of reflectors, namely a scanning reflector (13) and a fixed reflector (14), both of which are plane reflectors; the fixed reflector (14) and the azimuth turntable (5) are fixedly connected in a manner with an adjustable pitch angle.

[0023] The scanning reflector (13) is connected to the pitch axis (9) through the scanning reflector adapter (12), the pitch axis (9) is connected to the pitch fixing seat (8) through the pitch bearing (10), and the pitch fixing seat (8) is connected to the azimuth turntable (5). The pitch motor (11) is connected to the pitch fixing seat (8) through its stator, the pitch motor (11) is connected to the pitch axis (9) through its rotor, and the pitch motor (11) drives the scanning reflector (13) through the pitch axis (9) to realize pitch rotation.

[0024] The fixed reflector (14) is connected to the azimuth turntable (5), and the azimuth turntable (5) is connected to the azimuth axis (2). The azimuth motor (4) is connected to the azimuth fixed seat (1) through its stator, and the azimuth motor (4) is connected to the azimuth axis (2) through its rotor. The azimuth motor (4) drives the azimuth turntable (5) through the azimuth axis (2) to realize the rotation of the entire scanning turntable in the horizontal azimuth.

[0025] During operation: according to the actual rated scanning task, the servo control system controls the azimuth motor (4) and the pitch motor (11) through the azimuth encoder (6) and the pitch encoder (16) to respectively drive the azimuth axis (2) and the pitch axis (9) to move, and adjust the relative position relationship between the scanning reflector (13) and the fixed reflector (14). After the relative position relationship between the scanning reflector (13), the fixed reflector (14) and the subsequent signal processing system is adjusted, the scanning reflector (13) reflects the external light collected by it to the fixed reflector (14), and then reflects it again to the subsequent signal processing system through the fixed reflector (14), so that the entire turntable realizes the high-precision scanning task within the rated range.

[0026] Rated scanning tasks can be divided into: azimuth scanning, elevation scanning or a combination of the two for more complex scanning.

[0027] Azimuth scanning: The servo control system controls the azimuth motor (4) to drive the azimuth axis (2) to move, and the azimuth encoder (6) cooperates to achieve precision control, thereby achieving a high-precision scanning task in the azimuth direction of the turntable.

[0028] Pitch scanning: The servo control system controls the pitch motor (11) to drive the pitch axis (9) to move, and the pitch encoder (16) cooperates to achieve precision control, thereby achieving a high-precision scanning task in the pitch direction of the turntable.

[0029] Figure 5 The schematic diagram of the structure of the existing single-mirror scanning turntable. It can be seen from the above embodiments that the present invention realizes a larger light scanning angle in a limited load space by setting a scanning mirror (13) with adjustable pitch angle, and then supplemented by a fixed mirror (14) with adjustable pitch angle; and further provides a combination of multiple mirror surfaces to achieve a larger scanning range and reduce the response sensitivity requirements of the subsequent signal processing system. The present invention overcomes the problem that the existing single-mirror scanning turntable in a limited load space cannot complete the corresponding scanning task.

Claims

1. A dual-mirror optical scanning turntable, characterized in that: The invention comprises an azimuth fixing seat (1), an azimuth axis (2), an azimuth bearing (3), an azimuth motor (4), an azimuth turntable (5), an azimuth encoder (6), an azimuth bearing pressing ring (7), a pitch fixing seat (8), a pitch axis (9), a pitch bearing (10), a pitch motor (11), a scanning reflector adapter (12), a scanning reflector (13), a fixed reflector (14), a pitch axis cover plate (15), a pitch encoder (16), a pitch encoder adapter (17) and a pitch bearing pressing ring (18); The scanning reflector (13) is connected to the pitch axis (9) via the scanning reflector adapter (12); the pitch axis (9) is connected to the pitch fixing seat (8) via the pitch bearing (10); the pitch fixing seat (8) is connected to the azimuth turntable (5); the pitch motor (11) is connected to the pitch fixing seat (8) via its stator; the pitch motor (11) is connected to the pitch axis (9) via its rotor; the pitch motor (11) drives the scanning reflector (13) via the pitch axis (9) to achieve pitch rotation; The fixed reflector (14) is connected to the azimuth turntable (5), and the azimuth turntable (5) is connected to the azimuth axis (2); the azimuth motor (4) is connected to the azimuth fixed seat (1) through its stator, and the azimuth motor (4) is connected to the azimuth axis (2) through its rotor; the azimuth motor (4) drives the azimuth turntable (5) through the azimuth axis (2) to realize the rotation of the entire scanning turntable in the horizontal azimuth; The scanning reflector (13) reflects the collected external light to the fixed reflector (14), and then the light is reflected again to the subsequent signal processing system by the fixed reflector (14).

2. The dual-mirror optical scanning turntable according to claim 1, characterized in that: The scanning reflector (13) is a convex mirror to further expand the scanning range.

3. The dual-mirror optical scanning turntable according to claim 1, characterized in that: The fixed reflector (14) is connected to the azimuth turntable (5) in a fixed connection mode with an adjustable pitch angle, so as to further expand the scanning range.

4. The dual-mirror optical scanning turntable according to claim 3, characterized in that: The fixed reflector (14) is a concave mirror, which cooperates with the pitch angle adjustment of the azimuth turntable (5) to improve the response sensitivity of the subsequent signal processing system.

5. The dual-mirror optical scanning turntable according to claim 3, characterized in that: The fixed reflector (14) is a convex mirror, which cooperates with the pitch angle adjustment of the azimuth turntable (5) to further expand the scanning range.

6. The dual-mirror optical scanning turntable according to claim 1, characterized in that: The specific working process is as follows: the servo control system controls the azimuth motor (4) and the pitch motor (11) through the azimuth encoder (6) and the pitch encoder (16) to respectively drive the azimuth axis (2) and the pitch axis (9) to move, so that the entire turntable can achieve a high-precision scanning task within a rated range.

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