Multi-focal-segment lens array structure for low-altitude detection
By employing a multi-focal-length lens array structure and image fusion technology, the problem of balancing field of view and imaging quality in low-altitude detection has been solved, achieving full coverage and high-precision imaging.
Patent Information
- Application Number
- CN202423083609.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing low-altitude detection and imaging technologies cannot simultaneously achieve a wide field of view and high imaging quality, requiring radar or radio guidance, and thus cannot achieve full coverage and high-precision detection.
Employing a multi-focal-length lens array structure, different vertical field of view is achieved by using cameras with different focal lengths to stitch together panoramic images. These images are then fused using image processing equipment to enhance low-altitude target detection capabilities and imaging accuracy.
It achieves full low-altitude coverage with a 360° horizontal field of view and a 90° vertical field of view, improving low-altitude target detection capabilities and imaging accuracy, and meeting real-time imaging requirements.
Smart Images
Figure CN223501290U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of array imaging technology, and particularly relates to a multi-focal length lens array structure for low-altitude detection. Background Technology
[0002] With the development of the low-altitude economy, ensuring low-altitude safety is of paramount importance. Currently, imaging technologies used for low-altitude detection mainly employ telephoto visible light or infrared lenses with variable focal length mounted on an optoelectronic turntable. These lenses can track low-altitude targets at relatively long distances. However, due to the small field of view of telephoto lenses, the imaging lenses cannot actively detect targets over a wide area and require guidance from radar or radio. Therefore, there is an urgent need to develop a new array imaging structure that provides a wider field of view and higher imaging quality. This structure can detect both distant and nearby low-altitude targets, achieving full video coverage of the entire low-altitude region and actively detecting suspicious targets within the entire low-altitude coverage area, providing accurate guidance for other systems. Summary of the Invention
[0003] Therefore, this utility model provides a multi-focal length lens array structure for low-altitude detection to solve the technical problem that the field of view and detection distance of a single imaging lens cannot be simultaneously considered.
[0004] The technical solution of this utility model is as follows: A multi-focal length lens array structure for low-altitude detection includes: at least one array camera group, the array camera group includes: a base and two mounting side plates, the two mounting side plates are vertically mounted on the base and the two mounting side plates are arranged at an angle;
[0005] Multiple mounting areas are provided between the two mounting side plates and the base from bottom to top. At least one camera is installed obliquely in each mounting area. The cameras in the same mounting area have the same vertical field of view. The vertical field of view of the camera corresponding to each mounting area increases from bottom to top. The focal length of the camera corresponding to each mounting area decreases from bottom to top. The number of cameras corresponding to each mounting area decreases from bottom to top.
[0006] Furthermore, there are four installation areas, which are arranged from bottom to top as a first installation area, a second installation area, a third installation area, and a fourth installation area. The first installation area has 10 cameras, the second installation area has 8 cameras, the third installation area has 2 cameras, and the fourth installation area has 1 camera.
[0007] Furthermore, the cameras within the mounting area are symmetrically arranged along the center line of the base.
[0008] Furthermore, the cameras in the first mounting area are arranged in two rows of five columns, and the cameras in the second mounting area are arranged in two rows of four columns.
[0009] Furthermore, the vertical field of view of the camera in the first mounting area is 0°~14°, the vertical field of view of the camera in the second mounting area is 14°~34°, the vertical field of view of the camera in the third mounting area is 34°~56°, and the vertical field of view of the camera in the fourth mounting area is 56°~90°.
[0010] Furthermore, the number of array camera groups is m, and the horizontal field of view of each array camera group is 360 / m, where m is a positive integer less than 10.
[0011] The beneficial effects of this invention are as follows: This invention can achieve full coverage at low altitudes, with a horizontal field of view of up to 360° and a vertical field of view of up to 90°. This invention is composed of multiple lenses with different focal lengths, each responsible for a different vertical field of view, to achieve a wider field of view and higher resolution. This invention improves the detection capability and imaging accuracy of flying targets in the low-altitude range by increasing the number of high-focal-length cameras at low altitudes. Attached Figure Description
[0012] Figure 1 This is a front view of the present invention.
[0013] Figure 2 This is a side view of the present invention.
[0014] Figure 3 This is a schematic diagram of the vertical field of view of this utility model.
[0015] Figure 4 This is a top view of the present invention. Detailed Implementation
[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0017] In the embodiments of this utility model, Figure 1 and Figure 2 This is a structural schematic diagram of a multi-focal length lens array structure for low-altitude detection according to the present invention, as shown in the figure. Figure 1 and Figure 2As shown, the present invention includes at least one array camera group 1, the array camera group 1 including: a base 11 and two mounting side plates 12, the two mounting side plates 12 being vertically mounted on the base 11 and the two mounting side plates 12 being arranged at an angle.
[0018] Multiple mounting areas are provided from bottom to top between the two mounting side plates 12 and the base 11. At least one camera 3 is installed obliquely in each mounting area. The vertical field of view of the cameras 3 in the same mounting area is the same. The vertical field of view of the cameras 3 corresponding to each mounting area increases from bottom to top. The focal length of the cameras 3 corresponding to each mounting area decreases from bottom to top. The number of cameras 3 corresponding to each mounting area decreases from bottom to top.
[0019] This invention consists of multiple cameras 3 with different focal lengths. The lenses of the cameras 3 with different focal lengths are responsible for different vertical field of view. The images are fused by the back-end image processing equipment to stitch together the volume images of the individual cameras 3 into a panoramic image covering the entire range, so as to achieve a wider field of view and higher resolution.
[0020] In one embodiment of this utility model, the number of mounting areas is 4. The mounting areas are, from bottom to top, a first mounting area 21, a second mounting area 22, a third mounting area 23, and a fourth mounting area 24. The first mounting area 21 has 10 cameras 3, the second mounting area 22 has 8 cameras 3, the third mounting area 23 has 2 cameras 3, and the fourth mounting area 24 has 1 camera 3.
[0021] When multiple flying targets appear simultaneously, this invention can simultaneously track and image multiple targets within its coverage area without affecting each other. When low-altitude flying objects pass through the coverage area of the array camera 3 at the same altitude, the imaging pixels of the flying objects vary within a certain range, ensuring a sufficient number of pixels for target identification. This invention improves the detection capability and imaging accuracy of flying targets in the low-altitude range by increasing the number of high-focal-length cameras 3 for low-altitude applications.
[0022] In one embodiment of this utility model, the cameras 3 are symmetrically arranged along the center line of the base 11 within the mounting area. The cameras 3 are arranged in two rows of five columns within the first mounting area 21, and in two rows of four columns within the second mounting area 22.
[0023] In one embodiment of this utility model, such as Figure 2 As shown, each camera is mounted on a bracket, and the bracket tilts at different angles in each mounting area. The tilt angle of the bracket is used to adjust the camera's vertical field of view. Figure 3As shown, the vertical field of view of camera 3 in the first mounting area 21 is 0°~14°, the vertical field of view of camera 3 in the second mounting area 22 is 14°~34°, the vertical field of view of camera 3 in the third mounting area 23 is 34°~56°, and the vertical field of view of camera 3 in the fourth mounting area 24 is 56°~90°.
[0024] In one embodiment of this utility model, such as Figure 4 As shown, the number of array camera groups 1 is m, and the horizontal field of view of each array camera group 1 is 360° / m, where m is a positive integer less than 10. By combining multiple array camera groups 1, typical coverage scenarios can be achieved, such as horizontal field of view reaching 90°, 180°, 270°, and 360°. The combined array camera groups 1 can achieve full low-altitude coverage, with a horizontal field of view reaching 360° and a vertical field of view reaching 90°.
[0025] This invention requires real-time imaging, with a panoramic imaging time of less than 600ms. All cameras 3 within the array camera group 1 image simultaneously, rather than using time-division and domain-division imaging stitching and fusion. This invention can improve imaging resolution through image fusion technology of image processing equipment, thereby more clearly identifying targets, and the total pixels of the panoramic image can reach over 100 million pixels. It should be noted that the image fusion algorithms used by the aforementioned image processing equipment are all conventional techniques in this field, and therefore will not be described in detail here.
[0026] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A multi-focal-length lens array structure for low-altitude detection, characterized in that, include: At least one array camera group (1), the array camera group (1) includes: a base (11), two mounting side plates (12), the two mounting side plates (12) are vertically mounted on the base (11), and the two mounting side plates (12) are arranged at an angle; Multiple mounting areas are arranged from bottom to top between the two mounting side plates (12) and the base (11). At least one camera (3) is installed obliquely in each mounting area. The vertical field of view of the cameras (3) in the same mounting area is the same. The vertical field of view of the cameras (3) corresponding to each mounting area increases from bottom to top. The focal length of the cameras (3) corresponding to each mounting area decreases from bottom to top. The number of cameras (3) corresponding to each mounting area decreases from bottom to top.
2. The multi-focal length lens array structure for low-altitude detection as described in claim 1, characterized in that, The number of installation areas is 4. The installation areas are, from bottom to top, the first installation area (21), the second installation area (22), the third installation area (23), and the fourth installation area (24). The first installation area (21) has 10 cameras (3), the second installation area (22) has 8 cameras (3), the third installation area (23) has 2 cameras (3), and the fourth installation area (24) has 1 camera (3).
3. The multi-focal length lens array structure for low-altitude detection as described in claim 2, characterized in that, The cameras (3) in the installation area are symmetrically arranged along the center line of the base (11).
4. The multi-focal-length lens array structure for low-altitude detection as described in claim 3, characterized in that, The cameras (3) in the first installation area (21) are arranged in two rows of five columns, and the cameras (3) in the second installation area (22) are arranged in two rows of four columns.
5. The multi-focal-length lens array structure for low-altitude detection as described in claim 2, characterized in that, The vertical field of view of the camera (3) in the first mounting area (21) is 0°~14°, the vertical field of view of the camera (3) in the second mounting area (22) is 14°~34°, the vertical field of view of the camera (3) in the third mounting area (23) is 34°~56°, and the vertical field of view of the camera (3) in the fourth mounting area (24) is 56°~90°.
6. The multi-focal length lens array structure for low-altitude detection as described in claim 1, characterized in that, The number of array camera groups (1) is m, and the horizontal field of view of each array camera group (1) is 360 / m, where m is a positive integer less than 10.