Unmanned aerial vehicle ultraviolet radiation characteristic simulation system

Abstract

The invention provides an unmanned aerial vehicle ultraviolet radiation characteristic simulation system. The system comprises a light source assembly, a radiation energy gradual change modulation assembly and a beam expanding output assembly. The light source assembly comprises an ultraviolet light source lamp which is used for providing ultraviolet light; the radiation energy gradient modulation assembly comprises two groups of electric control variable attenuation sheet assemblies and a controller, and the controller is used for controlling corresponding motors to drive attenuation sheet discs in the two groups of electric control variable attenuation sheet assemblies to rotate so as to switch combinations of attenuation sheets in the two groups of electric control variable attenuation sheet assemblies, so that energy with different attenuation multiples is generated; the beam expanding output assembly comprises at least two beam expanding output optical lenses; wherein an emission port of the ultraviolet light source lamp, one attenuation piece of attenuation pieces of the electric control variable attenuation piece assembly and the beam expanding output optical lens are sequentially and coaxially arranged, ultraviolet light emitted by the ultraviolet light source lamp is modulated through the electric control variable attenuation piece assembly, beam expanding is conducted on emergent light through the beam expanding output assembly, and therefore the ultraviolet radiation characteristic of the unmanned aerial vehicle is simulated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optical simulation testing, and particularly relates to a UAV ultraviolet radiation characteristic simulation system. BACKGROUND

[0002] With the expansion of the application scenarios of UAVs, higher technical requirements are put forward for the timely discovery and continuous monitoring of long-distance and low-detectable targets of UAVs. Under this background, higher requirements are put forward for photoelectric detection technology, especially in the ultraviolet band.

[0003] Ultraviolet radiation (usually referring to the solar blind ultraviolet band, about 240-280 nanometers) is a specific region in the electromagnetic spectrum. In nature, the sun is the main radiation source in this band, but on the earth's surface, due to the strong absorption of the atmospheric ozone layer, the solar background radiation in this band is very weak (i.e. "solar blind area"). However, many man-made targets (such as engine hot parts of aircraft, exhaust emission, electrical activity, special materials) or natural phenomena (such as flame, electric arc) will produce significant characteristic radiation in this band. This makes it possible to effectively identify and track such specific targets in weak natural background using ultraviolet detection technology, especially in complex environments or scenarios that require strong background interference.

[0004] At present, the sensitivity, resolution and dynamic range of existing photoelectric equipment are limited, and it is difficult to capture long-distance targets. The ultraviolet radiation signal of the target is extremely weak and is easily affected by atmospheric attenuation (absorption, scattering), which makes it difficult to effectively detect and initially capture the target, and it is difficult to continuously and effectively track and measure the ultraviolet radiation characteristics of the target, which makes it difficult to obtain a large amount of real, effective and long-distance target ultraviolet radiation characteristic data. SUMMARY

[0005] The purpose of the present application is to solve the technical problem that existing photoelectric equipment is difficult to continuously and effectively track and measure the ultraviolet radiation characteristics of long-distance UAVs, and a UAV ultraviolet radiation characteristic simulation system is provided.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the present application is:

[0007] A system for simulating the ultraviolet radiation characteristics of a drone is provided, including a light source component, a radiation energy gradient modulation component, and a beam expander output component. The light source component includes an ultraviolet light source lamp for providing ultraviolet light. The radiation energy gradient modulation component includes two sets of electrically controlled variable attenuator assemblies and a controller. Each set of electrically controlled variable attenuator assemblies includes a motor, an attenuator disk, and multiple attenuators of different specifications mounted on the attenuator disk. The controller controls the corresponding motor to drive the attenuator disks in the two sets of electrically controlled variable attenuator assemblies to rotate, thereby switching the combination of attenuators in the two sets of electrically controlled variable attenuator assemblies to generate energy with different attenuation factors. The beam expander output component includes at least two beam expander output optical mirrors. The emission port of the ultraviolet light source lamp, one attenuator in the electrically controlled variable attenuator assembly, and the beam expander output optical mirrors are arranged coaxially in sequence. The ultraviolet light emitted by the ultraviolet light source lamp is modulated by the attenuators in the electrically controlled variable attenuator assembly and then expanded by the beam expander output component to emit light, thereby simulating the ultraviolet radiation characteristics of a drone.

[0008] Furthermore, in each set of electronically controlled variable attenuator components, the attenuator disk has multiple light-transmitting holes along the circumference, and the attenuator is installed in the light-transmitting holes.

[0009] Furthermore, the diameter of the light-transmitting aperture is consistent with the light-emitting diameter of the ultraviolet light source lamp.

[0010] Furthermore, there are 7 light-transmitting holes evenly distributed around the circumference. On an attenuator plate, attenuators of 1dB, 2dB, 3dB, 4dB, 5dB, and 7dB are installed in the light-transmitting holes in a counterclockwise direction, and an empty hole is reserved.

[0011] Furthermore, on another attenuator plate, attenuators of 8dB, 10dB, 13dB, 20dB, 30dB, and 60dB are installed sequentially in the light-transmitting holes in a counterclockwise direction, with one empty hole reserved.

[0012] Furthermore, the controller can adjust the motor speed so that the attenuation factor combinations of the attenuators in the two electronically controlled variable attenuator assemblies can switch at different speeds, thereby achieving different radiation modulation times.

[0013] Furthermore, the output beam angle of the beam expander is in the range of 50° to 70°.

[0014] Furthermore, the beam-expanding output optical mirror is coated with an ultraviolet anti-reflection film.

[0015] The advantages of this invention are:

[0016] 1. The ultraviolet radiation characteristic simulation system designed in this invention is based on traditional ultraviolet radiation characteristic testing technology. It is designed with a matched radiation energy gradient modulation component, which can accurately simulate the rapid gradient change of the ultraviolet radiation energy signal of an incoming UAV. The beam expansion output component can simulate the beam emission angle of the ultraviolet radiation energy signal of the incoming UAV. The ultraviolet characteristic data obtained by measuring the UAV at close range using photoelectric equipment can simulate the ultraviolet characteristics of a UAV approaching from a distance.

[0017] 2. The ultraviolet radiation characteristic simulation system designed in this invention has the characteristics of simple structure, small size, easy operation and reusability. It can effectively simulate the ultraviolet characteristics when a drone approaches from a distance, thereby effectively reducing the test cost. Attached Figure Description

[0018] The features and advantages of the invention will become more readily apparent from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0019] Figure 1 This is a schematic diagram of the structure of the UAV ultraviolet radiation characteristic simulation system of the present invention;

[0020] Figure 2 This is a schematic diagram showing the location of the light-transmitting holes on the attenuation plate disk of the present invention.

[0021] In the diagram: 1-Light source component; 2-Radiation energy gradient modulation component; 3-Beam expansion output component. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0023] like Figure 1 As shown, the present invention provides a simulation system for the ultraviolet radiation characteristics of a UAV, including a light source component 1, a radiation energy gradient modulation component 2, and a beam expansion output component 3.

[0024] The light source assembly 1 includes an ultraviolet light source lamp, which is used to provide ultraviolet light. Preferably, the ultraviolet light source lamp is a deuterium lamp.

[0025] The radiated energy gradient modulation component 2 includes two sets of electrically controlled variable attenuator assemblies and a controller. Each set of electrically controlled variable attenuator assemblies includes a motor, an attenuator disk, and multiple attenuators of different specifications mounted on the attenuator disk. The controller is used to control the corresponding motor to drive the attenuator disks in the two sets of electrically controlled variable attenuator assemblies to rotate, thereby switching the combination of attenuators in the two sets of electrically controlled variable attenuator assemblies to generate energy with different attenuation factors. The attenuation factor of the electrically controlled variable attenuator assembly is determined by the energy value of the simulated target.

[0026] The beam expander output assembly 3 includes at least two beam expander output optical mirrors. The number of beam expander output optical mirrors is also determined by the energy value of the simulated target.

[0027] Among them, the light source component 1, the radiation energy gradient modulation component 2, and the beam expansion output component 3 are installed sequentially on the same mounting surface. The emission port of the ultraviolet light source lamp, one of the attenuators in the electronically controlled variable attenuator component, and the beam expansion output optical mirror are arranged coaxially in sequence. The ultraviolet light emitted by the ultraviolet light source lamp is modulated by the attenuator in the electronically controlled variable attenuator component and then expanded and emitted by the beam expansion output component 3, thereby simulating the ultraviolet radiation characteristics of the UAV.

[0028] This embodiment employs a traditional ultraviolet radiation characteristic testing technique, utilizing ultraviolet characteristic data obtained through measurements taken by a close-range UAV. A matching rapid radiation energy gradient modulation component 2 is designed to accurately simulate the rapid gradient change of the ultraviolet radiation energy signal from an incoming UAV. The beam expansion output component 3 can simulate the beam emission angle of the ultraviolet radiation energy signal from an incoming UAV. This is of great significance for the design, debugging, and testing of existing photoelectric detection equipment. Furthermore, the designed ultraviolet radiation characteristic simulation system has a simple overall structure, small size, is easy to operate, and is reusable, effectively reducing testing costs.

[0029] In each set of electronically controlled variable attenuator assemblies, multiple light-transmitting holes are provided circumferentially on the attenuator disk, and the attenuators are installed in the light-transmitting holes. By adjusting the specifications of the two attenuators located at the light-transmitting holes, different attenuation factors of energy can be obtained, enabling the simulation of different measurement targets.

[0030] The diameter of the light-transmitting aperture can be the same as the light-emitting diameter of the ultraviolet light source, so that all the ultraviolet light emitted by the ultraviolet light source can pass through the light-transmitting aperture.

[0031] like Figure 2As shown, seven light-transmitting holes are evenly arranged circumferentially. On one attenuator plate, attenuators of 1dB, 2dB, 3dB, 4dB, 5dB, and 7dB are installed sequentially in the light-transmitting holes in a counter-clockwise direction, with one empty hole reserved. On another attenuator plate, attenuators of 8dB, 10dB, 13dB, 20dB, 30dB, and 60dB are installed sequentially in the light-transmitting holes in a counter-clockwise direction, with one empty hole reserved. Different attenuator specifications can be combined to produce energy with different attenuation factors, adapting to a wider range of measurement targets. The reserved empty hole can accommodate attenuators of other specifications, serving as alternative attenuation factors for the electronically controlled variable attenuator assembly.

[0032] The controller can adjust the motor speed so that the attenuation factor combination of the attenuators in the two electronically controlled variable attenuator assemblies can switch at different speeds, thereby achieving different radiation modulation times. Different tuning times represent the flight speed of the UAV.

[0033] The beam-expanding output component 3 has an output beam angle defined in the range of 50° to 70°. A preferred beam-expanding output beam angle is 60°. Simultaneously, the beam-expanding output optical mirror can be coated with an ultraviolet anti-reflection film, which improves the transmittance of the beam-expanding output component 3 to the ultraviolet band, resulting in better optical performance of the entire system.

[0034] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered to be included within the scope of protection of the present invention.

Claims

1. A simulation system for the ultraviolet radiation characteristics of unmanned aerial vehicles (UAVs), characterized in that, include: A light source assembly includes an ultraviolet light source lamp, the ultraviolet light source lamp being used to provide ultraviolet light; The radiation energy gradient modulation component includes two sets of electrically controlled variable attenuator assemblies and a controller. Each set of electrically controlled variable attenuator assemblies includes a motor, an attenuator disk, and multiple attenuators of different specifications mounted on the attenuator disk. The controller is used to control the corresponding motor to drive the attenuator disks in the two sets of electrically controlled variable attenuator assemblies to rotate, so as to switch the combination of attenuators in the two sets of electrically controlled variable attenuator assemblies, thereby generating energy with different attenuation factors. And a beam expander output assembly, including at least two beam expander output optical lenses; The ultraviolet light source lamp's emission port, one of the attenuators in the electronically controlled variable attenuator assembly, and the beam-expanding output optical mirror are arranged coaxially in sequence. The ultraviolet light emitted by the ultraviolet light source lamp is modulated by the attenuator in the electronically controlled variable attenuator assembly and then expanded and emitted by the beam-expanding output assembly, thereby simulating the ultraviolet radiation characteristics of a UAV.

2. The ultraviolet radiation characteristic simulation system according to claim 1, characterized in that, In each group of electronically controlled variable attenuator assemblies, the attenuator disk has multiple light-transmitting holes along the circumference, and the attenuator is installed in the light-transmitting holes.

3. The ultraviolet radiation characteristic simulation system according to claim 2, characterized in that, The diameter of the light-transmitting aperture is the same as the light-emitting diameter of the ultraviolet light source lamp.

4. The ultraviolet radiation characteristic simulation system according to claim 2, characterized in that, The light-transmitting holes are evenly arranged in seven circumferential directions. On one of the attenuator plates, attenuators of 1dB, 2dB, 3dB, 4dB, 5dB, and 7dB are installed in the light-transmitting holes in a counterclockwise direction, and an empty hole is reserved.

5. The ultraviolet radiation characteristic simulation system according to claim 4, characterized in that, On another attenuator disk, attenuators of 8dB, 10dB, 13dB, 20dB, 30dB, and 60dB are installed sequentially in the light-transmitting hole in a counterclockwise direction, with a blank hole reserved.

6. The ultraviolet radiation characteristic simulation system according to claim 1 or 2, characterized in that, The controller can adjust the motor speed so that the attenuation factor combination of the attenuators in the two electronically controlled variable attenuator assemblies switches at different speeds, thereby achieving different radiation modulation times.

7. The ultraviolet radiation characteristic simulation system according to claim 1, characterized in that, The beam expansion output component has an output beam angle in the range of 50° to 70°.

8. The ultraviolet radiation characteristic simulation system according to claim 1, characterized in that, The beam-expanding output optical mirror is coated with an ultraviolet anti-reflection film.

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