A chirally mounted windmill scanning imaging multi-dimensional variable mode camera simulation device

Abstract

The present invention relates to a chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device, belonging to the fields of aerospace optics and military satellite imaging technology. The simulation device comprises: a multi-dimensional variable modality camera rotation imaging simulation component, comprising: an external gear, an internal gear, a plurality of camera tilt adjustment gears, and a plurality of imaging cameras; a load flight simulation component, comprising: a motion guide rail, a load moving slider, a slider drive motor, and a rotation drive motor. The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device of the present invention can flexibly add or subtract cameras according to demand, freely adjust the installation angle of each camera, and can be freely combined according to different designed imaging modes. It provides a flexibly assembled rotation imaging simulation device for optional imaging in the fields of aerospace optics and military satellite imaging technology, and the results of the simulated imaging are of guiding significance for the design of rotation imaging solutions.

Description

Technical Field

[0001] The present invention relates to the fields of aerospace optics and military satellite imaging technology, and in particular to a chirally mounted windmill scanning imaging multi-dimensional variable mode camera simulation device. Background Art

[0002] Windmill rotary scanning relies on the payload's continuous 360° rotation around the rotary joint as the payload flies along the track, and combines the vertical track integration of the TDI detector and the payload's flight along the track to achieve continuous wide-area scanning imaging. The payload consists of multiple cameras mounted around the rotary joint in a chirally symmetrical manner. By selecting different camera numbers and mounting angles and matching the corresponding camera parameters, a variety of imaging modes can be achieved. For example, four cameras are mounted chirally symmetrically with no angle to the rotating plane, and alternately scan the ground to improve imaging efficiency and complete seamless stitching imaging.

[0003] Currently, there are some related literatures on using a single camera to swing conically or using a reflector to swing in the same direction for scanning imaging. Multi-dimensional variable-modality camera scanning imaging modes are rarely involved. Conventional experimental devices have poor variability. One device verifies one imaging mode, and it is not possible to flexibly add or subtract cameras or change the installation angle of the camera and the rotating plane to verify the imaging effect under variable mode. There is a lack of a variably configurable simulation device to verify the windmill rotation scanning imaging of a multi-dimensional variable-modality camera. Summary of the Invention

[0004] The present invention aims to solve the technical problems in the prior art, realize windmill rotation scanning imaging of multi-dimensional variable modality cameras with different installation angles, flexibly add or subtract cameras and change the installation angle, and provide a chirally installed windmill scanning imaging multi-dimensional variable modality camera simulation device.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A chirally mounted windmill scanning imaging multi-dimensional variable mode camera simulation device, comprising:

[0007] A multi-dimensional variable-modality camera rotation imaging simulation component, which is used to simulate a rotational imaging load and includes: an external gear, an internal gear, multiple camera tilt adjustment gears, and multiple imaging cameras;

[0008] A payload flight simulation component, which is used to simulate the flight trajectory of the payload and the payload carrier, and includes: a motion guide rail, a load moving slider, a slider drive motor, and a rotation drive motor;

[0009] The outer surface of the external gear is gear teeth, and the inner surface is a concentric hollow cylinder, which matches the rotary drive motor; the external gear is installed on the rotary drive motor, and the rotary drive motor can drive the external gear to rotate clockwise when viewed from the forward direction of the load moving slider;

[0010] The internal gear is a hollow cylinder with multiple grooves densely distributed on the outer surface and gear teeth meshing with the outer gear on the inner surface. The outer gear drives the inner gear to rotate in the same direction.

[0011] The plurality of imaging cameras are symmetrically mounted on the outer surface of the internal gear in a chiral manner with the center of the internal gear as the axis of symmetry, and the internal gear drives the imaging cameras to rotate; each imaging camera is connected to the internal gear via a camera tilt adjustment gear; the camera tilt adjustment gear is used to adjust the angle between the imaging camera and the rotating plane;

[0012] The motion guide rail is the motion track of the imaging load, and the load moving slider is arranged on the motion guide rail; the slider driving motor is arranged on the load moving slider, and the slider driving motor drives the moving slider to move back and forth along the motion guide rail at a fixed speed;

[0013] The rotation drive motor is arranged on the moving slider and is used to drive the external gear to rotate.

[0014] In the above technical solution, the camera tilt adjustment gear is used to adjust the angle between the imaging camera and the rotation plane within the range of -90° to 90°.

[0015] In the above technical solution, the forward speed of the load-moving slider and the rotation speed of the external gear are adjustable.

[0016] In the above technical solution, the plurality of imaging cameras move along the motion guide rail while rotating around the rail, so as to truly simulate the on-rail imaging state of the rotating scanning payload.

[0017] In the above technical solution, the number of the imaging cameras is 4.

[0018] The present invention has the following beneficial effects:

[0019] The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device of the present invention can be used to simulate the rotating scanning imaging of a windmill with a multi-dimensional variable modality camera at different mounting angles. The device can flexibly add or subtract N cameras according to demand, and is freely assembled. Driven by two motors, the N cameras advance along the track while rotating around the track. The advancing speed and rotation speed are controllable, realistically simulating the on-track imaging state of the rotating scanning payload. The angle between the N cameras and the rotating surface is flexibly adjustable from -90° to 90°, and the imaging mode can be freely selected.

[0020] The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device of the present invention provides a flexibly assembled rotation imaging simulation device for optional imaging, and the results of the simulation imaging have guiding significance for the design of rotation imaging solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the right side structure of the chiral mounted windmill scanning imaging multi-dimensional variable modality camera simulation device of the present invention.

[0023] Figure 2 for Figure 1 The diagram shows a top-down structural diagram of a chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device.

[0024] Figure 3 Schematic diagram of multiple cameras installed at multiple angles.

[0025] Figure 4 Another schematic diagram of multiple cameras installed at multiple angles.

[0026] Figure 5 Schematic diagram for calculating the angular velocity of internal and external gears.

[0027] Figure 6 Schematic diagram of four cameras arranged at equal intervals.

[0028] Figure 7 Schematic diagram of the rotation imaging process of four cameras.

[0029] The reference numerals in the figures indicate:

[0030] 1-external gear; 2-internal gear; 3-camera tilt adjustment gear; 4-imaging camera;

[0031] 5-Motion guide rail; 6-Load moving slider; 7-Slider drive motor; 8-Rotation drive motor;

[0032] 41 - first imaging camera; 42 - second imaging camera; 43 - third imaging camera; 44 - fourth imaging camera;

[0033] 91 - first imaging strip; 92 - second imaging strip; 93 - third imaging strip; 94 - fourth imaging strip. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings.

[0035] In one embodiment of the present invention, taking the installation of four cameras as an example, a chirally installed windmill scanning imaging multi-dimensional variable modality camera simulation device is proposed. The device includes two parts: the first part is a multi-dimensional variable modality camera rotation imaging simulation component, which is used to simulate the rotational imaging payload; the second part is a payload flight simulation component, which is used to simulate the payload's flight trajectory and payload carrier.

[0036] like Figure 1 and 2 As shown, the multi-dimensional variable modality camera rotation imaging simulation component includes: a small-diameter outer gear 1, a large-diameter inner gear 2, four camera tilt adjustment gears 3, and four imaging cameras 4 with the same configuration. The outer surface of the small-diameter outer gear 1 is gear teeth, represented by dotted lines, and the inner surface is a concentric hollow cylinder that matches the rotation drive motor 8; the small-diameter outer gear 1 is mounted on the rotation drive motor 8, and the rotation drive motor 8 can drive the small-diameter outer gear 1 to rotate clockwise (as viewed from the forward direction of the load moving slider 6); the large-diameter inner gear 2 is also a hollow cylinder, with multiple grooves densely distributed on the outer surface, and the inner surface is gear teeth that mesh with the small-diameter outer gear 1 (represented by dotted lines). The small-diameter outer gear 1 drives the large-diameter inner gear 2 to rotate in the same direction. The four imaging cameras 4 with the same parameters are chirally symmetrically mounted on the outer surface of the inner gear 2 with the center of the inner gear 2 as the symmetry axis. The inner gear 2 drives the multi-dimensional variable modality camera to rotate to achieve alternating imaging of ground scenes. In addition, the imaging camera 4 and the inner gear 2 are connected by the camera tilt adjustment gear 3. As shown Figure 3 and 4 As shown, the camera tilt adjustment gear 3 adjusts the angle between the imaging camera 4 and the rotating plane. The angle of each imaging camera 4 is individually adjustable. The angles corresponding to the first imaging camera 41, the second imaging camera 42, the third imaging camera 43, and the fourth imaging camera 44 are θ1, θ2, θ3, and θ4, respectively. The specific values ​​depend on the simulated imaging.

[0037] like Figure 1 and 2 As shown, the payload flight simulation component includes: a motion guide rail 5, a payload moving slider 6, a slider drive motor 7 and a rotation drive motor 8; the motion guide rail 5 is the motion trajectory of the imaging payload, the payload moving slider 6 is placed on the motion guide rail 5, and the slider drive motor 7 is placed on the payload moving slider 6. The slider drive motor 7 is installed on one side of the payload moving slider 6, and the slider drive motor 7 drives the payload moving slider 6 to move linearly to the left along the motion guide rail 5, and the speed and reciprocating movement direction can be adjusted; the rotation drive motor 8 is connected to the multi-dimensional variable modality camera rotation imaging simulation component, and drives the multi-dimensional variable modality camera rotation imaging simulation component to rotate while the payload moving slider 6 drives the payload forward.

[0038] The operating principle of the present invention is as follows: four imaging cameras 4 are identically configured and arranged sequentially at a designed inclination angle and spacing. Gears drive the four imaging cameras 4 to rotate at a fixed angular velocity. Simultaneously, a load-moving slider 6 drives the imaging cameras 4 forward, and the imaging cameras 4 alternately scan the ground. Different imaging modes can be achieved by varying the number, arrangement, and inclination of the imaging cameras 4.

[0039] The working process of the present invention is: determine the forward speed v of the required simulated load s , load rotation speed ω s , load quantity, arrangement and installation angle, according to the principle of proportional reduction, calculate the slider forward speed v=kv according to the forward speed of the load s , where k is the geometric scaling factor, and the same load rotation angular velocity, load quantity, arrangement and tilt angle are selected as the rotation angular velocity ω of the simulated component camera s , the number of cameras, the arrangement of cameras and the camera installation angle. Install the load moving slider 6 on the motion guide rail 5 and ensure that the slider drive motor 7 drives the load moving slider 6 to move smoothly.

[0040] Secondly, a rotation drive motor 8 is installed on the upper surface of the load moving slider 6. The rotation drive motor 8 is bonded to the inner surface of the small diameter outer gear 1, and the large diameter inner gear 2 is meshed with the outer gear 1. Since the inner gear 2 directly drives the imaging camera 4 to rotate, the rotation speed of the inner gear 2 must be ensured to be ω s ,like Figure 5 As shown, the inner diameter of the outer gear 1 is r1, and the outer diameter of the inner gear 2 is r2. As the linear speed of the meshing part (dashed circle) is the same, the rotation speed of the outer gear 1 driven by the rotary drive motor 8 is ω=(r2·ω s ) / r1.

[0041] like Figure 6 As shown, taking the rotational imaging of four imaging cameras 4 as an example, the imaging cameras 4 are arranged at equal intervals, and the imaging cameras 4 and the internal gear 2 are connected by the camera inclination adjustment gear 3. The four imaging cameras 4 are the first imaging camera 41, the second imaging camera 42, the third imaging camera 43 and the fourth imaging camera 44, which are arranged counterclockwise (seen from the forward direction of the slider), and the installation inclination angles are -θ, -θ, θ and θ respectively.

[0042] like Figure 7As shown, the internal gear 2 drives the imaging camera 4 to rotate clockwise (as viewed from the forward direction of the slider). If imaging a curved surface target, each imaging camera 4 scans in sequence to form a first imaging strip 91, a second imaging strip 92, a third imaging strip 93 and a fourth imaging strip 94, respectively. Relying on the coordination of the camera parameters, installation angle, rotation speed and forward speed of the imaging camera 4, the first imaging strip 91 and the third imaging strip 93 are imaging strips of the same curved surface target imaged by the first imaging camera 41 and the third imaging camera 43 from different directions. Similarly, the second imaging strip 92 and the fourth imaging strip 94 are imaging strips of another curved surface target imaged by the second imaging camera 42 and the fourth imaging camera 44 from different directions. The imaging strip data of the same curved surface target can be used to generate a stereo image. The splicing of the stereo images of the two curved surface targets expands the target range and improves the imaging efficiency.

[0043] In other specific embodiments, in addition to the imaging arrangement of the four imaging cameras 4 in the above specific embodiment, other numbers of imaging cameras 4 and various arrangements can be selected, and they can be combined according to design values ​​to simulate various imaging modes.

[0044] The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device of the present invention can be used to simulate the rotating scanning imaging of a windmill with a multi-dimensional variable modality camera at different mounting angles. The device can flexibly add or subtract N cameras according to demand, and is freely assembled. Driven by two motors, the N cameras advance along the track while rotating around the track. The advancing speed and rotation speed are controllable, realistically simulating the on-track imaging state of the rotating scanning payload. The angle between the N cameras and the rotating surface is flexibly adjustable from -90° to 90°, and the imaging mode can be freely selected.

[0045] The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device of the present invention provides a flexibly assembled rotation imaging simulation device for optional imaging, and the results of the simulation imaging have guiding significance for the design of rotation imaging solutions.

[0046] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device, characterized in that: include: A multi-dimensional variable-modality camera rotation imaging simulation component is used to simulate a rotation imaging load, comprising: an outer gear (1), an inner gear (2), a plurality of camera tilt adjustment gears (3), and a plurality of imaging cameras (4); A load flight simulation component is used to simulate the flight track of the load and the load carrier, and includes: a motion guide rail (5), a load moving slider (6), a slider drive motor (7) and a rotation drive motor (8); The outer surface of the external gear (1) is gear teeth, and the inner surface is a concentric hollow cylinder, which matches the rotary drive motor (8); the external gear (1) is mounted on the rotary drive motor (8), and the rotary drive motor (8) can drive the external gear (1) to rotate clockwise when viewed from the forward direction of the load moving slider (6); The inner gear (2) is a hollow cylinder with a plurality of grooves densely distributed on its outer surface and gear teeth meshing with the outer gear (1) on its inner surface. The outer gear (1) drives the inner gear (2) to rotate in the same direction. A plurality of imaging cameras (4) are chirally symmetrically mounted on the outer surface of the internal gear (2) with the center of the internal gear (2) as the axis of symmetry, and the internal gear (2) drives the imaging cameras (4) to rotate; each imaging camera (4) is connected to the internal gear (2) via a camera tilt adjustment gear (3); the camera tilt adjustment gear (3) is used to adjust the angle between the imaging camera (4) and the rotating plane; The motion guide rail (5) is a motion track of the imaging load, and the load moving slider (6) is arranged on the motion guide rail (5); the slider driving motor (7) is arranged on the load moving slider (6), and the slider driving motor (7) drives the load moving slider (6) to move back and forth along the motion guide rail (5) at a fixed speed; The rotary drive motor (8) is arranged on the load moving slider (6) and is used to drive the external gear (1) to rotate.

2. The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device according to claim 1, characterized in that: The camera tilt adjustment gear (3) is used to adjust the angle between the imaging camera (4) and the rotation plane within a range of -90° to 90°.

3. The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device according to claim 1, characterized in that: The forward speed of the load moving slider (6) and the rotational speed of the external gear (1) are adjustable.

4. The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device according to claim 1, characterized in that: The plurality of imaging cameras (4) move along the motion guide rail (5) while rotating around the rail, so as to truly simulate the on-rail imaging state of the rotating scanning payload.

5. The chirally mounted windmill scanning imaging multi-dimensional variable modality camera simulation device according to any one of claims 1 to 4, characterized in that: The number of the imaging cameras (4) is 4.

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