Night imaging system and unmanned aerial vehicle

Abstract

The utility model relates to a night imaging system and an unmanned aerial vehicle. The night imaging system comprises a lens, an image sensor and a near-infrared light supplement lamp, the near-infrared light supplement lamp is used for emitting near-infrared light to a target, and the lens is used for receiving the near-infrared light reflected by the target and imaging on the image sensor. According to the invention, a good imaging effect can be obtained at night only by matching the image sensors, the near-infrared light supplement lamps and the lenses of different specifications, so that the size space can be greatly saved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle imaging, in particular to a nighttime imaging system and an unmanned aerial vehicle. Background Art

[0002] In the inspection content based on drones, it is necessary to obtain environmental images in real time through airborne imaging devices and identify targets from them to complete tasks such as obstacle avoidance and target tracking. When performing the above tasks at night, target images are usually obtained through infrared imaging equipment, but in an environment with dim light and long target distance, the obtained target images are not clear.

[0003] Although the prior art with application number 202022955044.3 and patent name "An infrared imaging device and an infrared binocular module" discloses a solution for fill lighting through an infrared fill light, it requires the setting of a first reflective area and a second reflective area, and the overall structure is complex and heavy, and it cannot achieve automatic adjustment of the illumination of the fill light. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a night imaging system and a UAV, which only need to match image sensors, near-infrared fill lights and lenses of different specifications to obtain good imaging effects at night, which can greatly save size and space and reduce costs.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A nighttime imaging system is provided, comprising:

[0007] A lens, an image sensor and a near-infrared fill light; the near-infrared fill light is used to emit near-infrared light to a target, and the lens is used to receive the near-infrared light reflected back by the target and form an image on the image sensor;

[0008] The lens can receive near-infrared light input in the wavelength range of 400-950nm, and the transmittance is 90-100%, and the quantum effect of the image sensor at the near-infrared light in the wavelength range of 750-950nm is 0.65-0.75;

[0009] Alternatively, the lens can receive near-infrared light with a wavelength range of 400-750nm and near-infrared light with a wavelength of 850nm, and the transmittance is 90-100%, and the quantum effect of the image sensor at near-infrared light near a wavelength of 850nm is 0.65-0.75.

[0010] Preferably, the near-infrared light output by the near-infrared fill light has a wavelength range of 750nm-1000nm.

[0011] Preferably, the image sensor comprises a CMOS sensor.

[0012] Preferably, the nighttime imaging system further comprises:

[0013] Distance detection sensor, which is used to obtain the vertical distance between the near-infrared fill light and the target in real time;

[0014] And an illumination adjustment unit, which is respectively connected to the distance detection sensor and the near-infrared fill light and is used to adjust the illumination of the near-infrared fill light according to the vertical distance.

[0015] Preferably, the illumination adjustment unit adjusts the illumination of the near-infrared fill light according to the vertical distance, so that the edge illumination I of the near-infrared fill light satisfies the condition: Among them, C is the light source intensity of the near-infrared fill light; L is the vertical distance between the near-infrared fill light and the target; a is half of the beam angle of the near-infrared fill light; k is the coefficient.

[0016] Preferably, the beam angle range of the near-infrared fill light is 10°-60°.

[0017] A drone is also provided, comprising the night imaging system.

[0018] The beneficial effects of the utility model are:

[0019] The night imaging system in the present application has a simple structural design. It only needs to match image sensors, near-infrared fill lights and lenses of different specifications to obtain good imaging effects at night, which can greatly save size and space and reduce costs. At the same time, the illumination can be adjusted according to the target distance to obtain a clear target image. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a nighttime imaging system in Embodiment 1 of the present utility model;

[0021] Figure 2 The transmittance of the lens of the utility model for receiving near-infrared light input in the wavelength range of 400-950nm;

[0022] Figure 3 The transmittance of the lens of the present invention that receives near-infrared light input in the wavelength range of 400-750nm and around 850nm;

[0023] Figure 4 It is the quantum effect of the image sensor in the utility model at near infrared light with a wavelength range of 750-950nm;

[0024] Figure 5It is the quantum effect of the image sensor described in the utility model at near infrared light with a wavelength of about 850nm;

[0025] Figure 6 This is a connection diagram of the mid-range detection sensor, illumination adjustment unit, and near-infrared fill light of the utility model;

[0026] Figure 7 It is a schematic diagram of the edge illumination, beam angle and vertical distance of the near-infrared fill light of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0028] Embodiment 1:

[0029] like Figure 1 As shown, this embodiment provides a night imaging system, which includes: a lens 1, an image sensor 2 and a near-infrared fill light 3; wherein the near-infrared fill light 3 is used to emit near-infrared light R to a target 100, and the lens 1 is used to receive the near-infrared light R reflected back by the target 100 and form an image on the image sensor 2.

[0030] Specifically, the lens 1 in this embodiment is a full-band transmission lens that can receive the near-infrared light R reflected by the target 100 and the near-infrared light in the environment where the target 100 is located. Figure 2 As shown, it can receive near-infrared light input in the wavelength range of 400-950nm, and the transmittance is 90-100%, or as Figure 3 As shown, it can receive near-infrared light with a wavelength range of 400-750nm and near-infrared light input with a wavelength of about 850nm, and the transmittance is 90-100%, so as to fully ensure the night imaging effect;

[0031] The near-infrared light output by the near-infrared fill light 3 has a wavelength range of 750nm-1000nm, preferably 850nm; the image sensor 2 includes a CMOS sensor;

[0032] like Figure 4 As shown, the quantum effect of the image sensor 2 at the near-infrared light in the wavelength range of 750-950nm is 0.65-0.75, so it can also receive the near-infrared light R reflected back by the target 100 and the near-infrared light in the environment where the target 100 is located, and is preferably used in combination with the lens 1 that can receive the near-infrared light input in the wavelength range of 400-950nm and has a transmittance of 90-100%, or, as Figure 5As shown, the quantum effect of the image sensor 2 at near-infrared light near a wavelength of 850nm is 0.65-0.75. It is preferably used in combination with a lens 1 that can receive near-infrared light in the wavelength range of 400-750nm and near-infrared light input near a wavelength of 850nm and has a transmittance of 90-100% and a near-infrared fill light 3 that outputs near-infrared light with a wavelength of 850nm, thereby reducing the difficulty and cost of structural design.

[0033] Therefore, the night imaging system in this embodiment has a simple structural design. It only needs to match image sensors, near-infrared fill lights and lenses of different specifications to obtain good imaging effects at night, and can greatly save size and space and reduce costs.

[0034] Embodiment 2:

[0035] The difference between this embodiment and embodiment 1 is that Figure 6 As shown, the night imaging system also includes:

[0036] A distance detection sensor 4 is used to obtain a vertical distance L between the near-infrared fill light 3 and the target 100 in real time;

[0037] and an illumination adjustment unit 5, which is respectively connected to the distance detection sensor 4 and the near-infrared fill light 3, and is used to adjust the illumination of the near-infrared fill light 3 according to the vertical distance L, so that the edge illumination I of the near-infrared fill light 3 meets the condition: Among them, C is the light source intensity of the near-infrared fill light 3; L is the vertical distance between the near-infrared fill light 3 and the target 100; a is half of the beam angle of the near-infrared fill light 3. In this embodiment, the beam angle range of the near-infrared fill light 3 is 10°-60°; k is a coefficient, which can be determined according to the specification parameters of the near-infrared fill light 3 and the usage scenario.

[0038] like Figure 7 As shown, the larger the vertical distance L between the near-infrared fill light 3 and the target 100, the smaller the edge illumination I; similarly, the larger the beam angle, the smaller the edge illumination I; the larger the light source intensity C of the near-infrared fill light 3, the larger the edge illumination I. Therefore, in practical applications, under the premise of determining the beam angle and light source intensity C, the illumination can be adjusted by the vertical distance L to obtain a clear target image.

[0039] Embodiment 3:

[0040] This embodiment provides a drone, which includes the night imaging system described in Embodiment 1 or 2.

[0041] To sum up, the night imaging system in the present application has a simple structural design. It only needs to match image sensors, near-infrared fill lights and lenses of different specifications to obtain good imaging effects at night, which can greatly save size and space and reduce costs. At the same time, the illumination can be adjusted according to the target distance to obtain a clear target image.

[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A nighttime imaging system, characterized in that: include: A lens, an image sensor and a near-infrared fill light; the near-infrared fill light is used to emit near-infrared light to a target, and the lens is used to receive the near-infrared light reflected back by the target and form an image on the image sensor; The lens can receive near-infrared light input in the wavelength range of 400-950nm, and the transmittance is 90-100%, and the quantum effect of the image sensor at the near-infrared light in the wavelength range of 750-950nm is 0.65-0.75; Alternatively, the lens can receive near-infrared light with a wavelength range of 400-750nm and near-infrared light with a wavelength of 850nm, and the transmittance is 90-100%, and the quantum effect of the image sensor at near-infrared light near a wavelength of 850nm is 0.65-0.

75.

2. The nighttime imaging system according to claim 1, characterized in that: The near-infrared light output by the near-infrared fill light has a wavelength range of 750nm-1000nm.

3. The nighttime imaging system according to claim 1, characterized in that: The image sensor includes a CMOS sensor.

4. The nighttime imaging system according to claim 1, wherein: The nighttime imaging system further comprises: Distance detection sensor, which is used to obtain the vertical distance between the near-infrared fill light and the target in real time; And an illumination adjustment unit, which is respectively connected to the distance detection sensor and the near-infrared fill light and is used to adjust the illumination of the near-infrared fill light according to the vertical distance.

5. The nighttime imaging system according to claim 4, characterized in that: The illumination adjustment unit adjusts the illumination of the near-infrared fill light according to the vertical distance so that the edge illumination I of the near-infrared fill light satisfies the condition: Among them, C is the light source intensity of the near-infrared fill light; L is the vertical distance between the near-infrared fill light and the target; a is half of the beam angle of the near-infrared fill light; k is the coefficient.

6. The nighttime imaging system according to claim 5, characterized in that: The beam angle range of the near-infrared fill light is 10°-60°.

7. A drone, characterized in that: A nighttime imaging system comprising the method described in any one of claims 1 to 6.

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