Sighting telescope for detecting unmanned aerial vehicle and control method of sighting telescope

Abstract

According to the sighting telescope for detecting the unmanned aerial vehicle and the control method of the sighting telescope, a view field area is scanned mainly through active narrow-band near-infrared laser, remote detection and discovery of peeping photoelectric equipment of the unmanned aerial vehicle can be achieved, and the sighting telescope is small in system size and low in cost. According to the main technical scheme, the sighting telescope of the detection unmanned aerial vehicle is characterized in that a laser emitting module is used for emitting detection laser; the imaging assembly is used for acquiring image information; the main control module is connected with the laser emitting module, the imaging assembly and the display module, the main control module is used for controlling the laser emitting module to emit laser and extracting unmanned aerial vehicle information according to the image information, and the display module is used for displaying according to the image information and the unmanned aerial vehicle information. The invention is mainly used for laser detection.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-UAV, and in particular to a sight for detecting UAV and a control method thereof. Background Art

[0002] The anti-UAV system is mainly composed of detection, tracking and early warning technology, damage technology, interference technology and other parts. Detection technology is the premise and key. At present, radar detection, photoelectric detection, radio detection and acoustic detection are the main means of detecting low, slow and small UAVs. Among them, radar detection: the detection equipment is expensive, the equipment is large, and the installation conditions are high; the detection effect is affected by the materials used by the UAV. Photoelectric detection: infrared: it is difficult to identify the shape of weak targets, which is easy to cause misjudgment; it is difficult to detect UAVs with weak heat sources; the detection speed is limited by factors such as the detection algorithm; it is difficult to distinguish between flying birds and targets from the characteristics of the signal, and it is easy to misjudge birds as UAVs. It can be seen that: the detection speed is affected by factors such as the algorithm; it is difficult to distinguish between UAVs and objects of similar size (such as birds), and the false alarm rate will be high; most commonly used UAVs are white, and the distinction is low against the light sky background. LiDAR: high cost, short detection distance; large size, and needs to be installed. Acoustic detection: the detection effect is poor for small UAVs with tiny sounds; it is interfered by environmental noise and has weak anti-interference ability; there is no detection effect for micro UAVs and silent UAVs. Radio detection: It is impossible to detect radio-silent drones; it is difficult to detect encrypted signals; the corresponding drone types in the spectrum library are limited, and it is difficult to detect drones using unknown frequency bands; passive detection spectrum signals are easily interfered.

[0003] Therefore, it is an urgent problem to provide a detection method that avoids the above-mentioned shortcomings of the existing detection technology and realizes a more accurate and low-cost detection method. Summary of the invention

[0004] In view of this, the present invention provides a sight for detecting UAVs and a control method thereof, which mainly scans the field of view area through an active narrow-band near-infrared laser, and can detect and discover the UAVs by peeping optoelectronic equipment at a long distance. The system has a small size and low cost.

[0005] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0006] On the one hand, the present invention provides a sight for detecting a drone, comprising:

[0007] A laser emission module (100), used for emitting a detection laser;

[0008] An imaging component (200) for acquiring image information;

[0009] A main control module (300) and a display module (400), wherein the main control module (300) is connected to the laser emission module (100), the imaging component (200) and the display module (400), the main control module (300) is used to control the laser emission module (100) to emit laser light and to extract drone information based on image information, and the display module (400) is used to display based on image information and drone information.

[0010] The laser emission module (100) comprises a laser (110) and a beam shaping component (120), wherein the laser (110) is used to emit a detection laser, the beam shaping component (120) is located in front of the detection laser emission direction of the laser (110), and the beam shaping component (120) is used to expand and homogenize the detection laser.

[0011] The imaging component (200) includes an objective lens (210), a filter (230), a detector (220) and an image processing circuit;

[0012] The objective lens (210) is used to receive external light energy radiation, the filter (230) is located between the objective lens (210) and the detector (220), the filter (230) is used to filter light, the detector (220) is connected to the image processing circuit, the image processing circuit is connected to the main control module (300), and the detector (220) is used to obtain image information.

[0013] The filter (230) includes a bandpass filter, a narrowband filter and a switching element, the bandpass filter and the narrowband filter are used for filtering light, and the switching element is connected to the bandpass filter and the narrowband filter and is used to switch the connection between the bandpass filter and the narrowband filter so that one of them is located between the objective lens (210) and the detector (220).

[0014] The display module (400) comprises a display screen (410), an eyepiece (420), an eyepiece focusing member (430), a power switch (440) and an eye mask (450); the display screen (410) is used for displaying according to image information and drone information; the eyepiece (420) is located on a display side of the display screen (410); the eyepiece (420) is used for magnifying content displayed on the display screen (410); the eyepiece focusing member (430) is connected to the eyepiece (420) to adjust the position of the eyepiece (420); the power switch (440) is connected to the display screen (410) to turn on and off the display screen (410); and the eye mask (450) is located on a side of the eyepiece (420) away from the display screen (410).

[0015] Among them, the scopes for detecting drones also include:

[0016] A housing (500) and a mounting interface (600);

[0017] The laser emission module (100), the imaging component (200), the main control module (300) and the display module (400) are all connected to the housing (500);

[0018] The mounting interface (500) is connected to the housing (500), and the mounting interface (500) is used to be connected to a gun.

[0019] On the other hand, the present invention also provides a method for controlling a sight of a detection drone, which is used to control the sight of the detection drone as described in any one of the above, and the method comprises:

[0020] Control the laser emission module to emit detection laser;

[0021] The image information of the imaging component is obtained, the drone information is extracted according to the image information, and the image information and the drone information are sent to the display module for display.

[0022] Among them, the laser emission module is controlled to emit a detection laser, and the specific steps are as follows:

[0023] Controlling the imaging component to switch between the imaging mode and the detection mode at a preset frequency; in the imaging mode, controlling the laser emission module to stop emitting the detection laser, controlling the bandpass filter of the imaging component to be located between the objective lens and the detector of the imaging component; in the detection mode, controlling the laser emission module to emit the detection laser of a preset duration, controlling the narrowband filter of the imaging component to be located between the objective lens and the detector of the imaging component;

[0024] The image information of the imaging component is obtained, the drone information is extracted according to the image information, and the image information and the drone information are sent to the display module for display. The specific steps are as follows:

[0025] The image information of the imaging component is obtained. In the detection mode, the drone information is extracted based on the image information. In the imaging mode, the image information and the drone information are sent to the display module for display.

[0026] Among them, drone information is specifically:

[0027] UAV location information and aiming point information;

[0028] Send the image information and drone information to the display module for display. The specific steps are as follows:

[0029] The image is displayed according to the image information, the position of the drone is framed on the image information according to the drone position information and the aiming point information, and a cross scale and a drone strike aiming scale are superimposed on the display interface.

[0030] The steps of obtaining image information of the imaging component, extracting drone information based on the image information, and sending the image information and drone information to the display module for display are as follows:

[0031] Acquire image information of the imaging component, extract highlight area features according to the image information, and if the highlight area has the characteristics of the drone outline, send the image information and the first drone information to the display module for display; if the highlight area is a circle, send the image information and the second drone information to the display module for display;

[0032] The first drone information includes the drone position information and the first aiming point information. The first aiming point information includes the first frame selection method. The image information and the first drone information are sent to the display module for display. The specific steps are as follows:

[0033] Displaying the image according to the image information, selecting the position of the drone in the first manner on the image information according to the drone position information and the first aiming point information, and superimposing a cross scale and a drone strike aiming scale on the display interface;

[0034] The second type of drone information includes drone position information and second type of aiming point information. The second type of aiming point information includes a second frame selection method. The image information and the second type of drone information are sent to the display module for display. The specific steps are as follows:

[0035] The image is displayed according to the image information, the position of the UAV is framed in the second manner on the image information according to the UAV position information and the second aiming point information, and a cross scale and a UAV strike aiming scale are superimposed on the display interface.

[0036] The invention proposes a sight for detecting drones and a control method thereof. To address the threat of drones, the invention proposes a sight that is small in size, light in weight, and easy to carry. Laser is used to emit toward the drone, and the objective lens receives the returned external signal, forms an image in the detector, and uses a back-end image processing algorithm to locate the position of the drone, thereby improving the ability to identify drones at a long distance, increasing the accuracy of attacking drones, and enhancing safety assurance, and has strong application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a sight for detecting a drone provided by an embodiment of the present invention;

[0038] Figure 2 A structural block diagram of a sight for detecting a drone provided by an embodiment of the present invention;

[0039] Figure 3A schematic diagram of the light rays of a laser emission module of a sight for detecting a drone provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of signals of a sight for detecting a drone in an imaging mode provided by an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of signals when a sight for detecting a drone is switched between an imaging mode and a detection mode provided by an embodiment of the present invention;

[0042] Figure 6 A flowchart of a control method for a sight for detecting a drone provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation method, structure, characteristics and effects of a sight for detecting a drone proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0044] like Figure 1-2 As shown, an embodiment of the present invention provides a sight for detecting a drone, comprising:

[0045] A laser emission module (100), used for emitting a detection laser;

[0046] An imaging component (200) for acquiring image information;

[0047] A main control module (300) and a display module (400), wherein the main control module (300) is connected to the laser emission module (100), the imaging component (200) and the display module (400), the main control module (300) is used to control the laser emission module (100) to emit laser light and to extract drone information based on image information, and the display module (400) is used to display based on image information and drone information.

[0048] In addition, the sight for detecting the UAV also includes: a power module (700), the power module (700) is connected to the main control module (300), the imaging component (200), the laser emission module (100) and the display module (400), and the power module (700) can be powered by commonly used batteries such as 18650 and 5#. If two 18650 batteries are used for power supply, the voltage is input to the main control module (300) and then distributed for use by each component. Figure 1 As shown, the power module (700) may further include a battery compartment (710) and a battery compartment cover switch (720).

[0049] In one embodiment, the sight of the detection drone also includes a housing (500) and a mounting interface (600). The laser emission module (100), the imaging component (200), the main control module (300) and the display module (400) are all connected to the housing (500). The mounting interface (500) is connected to the housing (500), and the mounting interface (500) is used to connect to a gun. The housing (500) may be a cavity structure, and the main control module (300), the power module (700) and part of the structure of the imaging component (200) may be arranged in the housing (500), and the other structures of the imaging component (200) as well as the laser emission module (100), the display module (400) and the like may be connected to the housing (500) and placed outside the housing (500) as needed. The mounting interface (600) may adopt a Picatinny rail interface, and the sight of the detection drone is used to be installed on a variety of guns through the Picatinny rail interface. This will be further described in detail later in conjunction with a more specific structure.

[0050] The laser emission module (100) emits a uniform array laser beam, and the laser divergence angle matches the field of view of the imaging component. The imaging component (200) is used to receive an external scene image and a laser reflection image to generate image information. The main control module (300) communicates with each functional module and manages the distribution of power of the power module (700). The laser emission and parameter setting of the laser emission module (100) are controlled; the parameter configuration of the imaging component (200) is controlled, image information is received and drone target information is extracted; the drone position is framed and the aiming point is calculated and sent to the display module (400) for display. The frame selection of the drone position is to generate a frame that can reflect the drone position after identifying the drone, and the drone position is indicated in the form of a frame on the image. The display module (400) is used to display the target area image and the target orientation, and the interface is superimposed with a cross scale and a drone strike aiming scale. Among them, the target area image is a perspective image that follows the movement of the gun, or the external scene image received by the imaging component (200). The target orientation refers to the frame that can reflect the position of the drone. The cross scale and the drone strike aiming scale are auxiliary lines on the display interface. The cross scale is the crosshairs, and the strike aiming scale is the ballistic shooting table scale, which is used to correct the gravity effect on the bullet. Power module: Provides the required power for the system.

[0051] like Figure 2 As shown, the laser emission module (100) is used to emit a planar array laser beam, and the planar array laser beam is used to illuminate the sky area. When there is an object in the sky, that is, there is Figure 2When the target is a drone as shown in A, the object surface reflects, and the reflected light spot is imaged by the imaging component (200) to form image information. The image information is processed to extract the target contour features to determine whether it is a drone. When the laser is irradiated to the optical camera mounted on the drone, due to the cat's eye effect, the reflection intensity of the detection surface through the camera lens is several orders of magnitude higher than the reflection intensity of the surface of other parts of the drone. At this time, the echo feature of the laser received by the detector is a bright spot (camera reflection), and other areas are very dark. When the bright spot is detected, it means that the drone is conducting reconnaissance on us. At the same time, since birds do not have the cat's eye feature, the bright spot can be ruled out as a target of birds.

[0052] Since the reflection intensity of the drone lens is 2 to 3 orders of magnitude higher than that of the drone body surface, the detection distance of the lens is much higher than the target contour imaging detection method. That is, when the drone is conducting long-distance reconnaissance and surveillance in the direction of our equipment, the bright spot of the lens due to the cat's eye effect can be detected; if the opponent is not monitoring our area, the target can also be identified at a close distance by analyzing the drone contour.

[0053] The target extraction strategy is: process the laser reflection image and extract the image grayscale value, which represents the strength of the reflected light energy. Automatically identify whether there is an obvious highlight area in the image. Extract the highlight area features. If the highlight area has the characteristics of a drone outline, the target is a drone or a drone-like target (such as a bird); if the highlight area is circular, it is a cat's eye target, which is caused by strong reflection of the optical camera.

[0054] In summary, when the UAV optoelectronic pod is conducting reconnaissance on our alert area, the present invention can capture the optical lens of the UAV from a distance, while also ruling out the possibility that the object is a bird. When the UAV is not conducting reconnaissance on our area, the UAV can also be identified by analyzing the laser reflection profile of the object, but this method is closer than the recognition distance of the lens.

[0055] For the existing solutions for drone detection: Radar detection: At present, radar detection is based on the Doppler effect, and can accurately measure the distance of the target according to the reflected echo; combined with the radar's own azimuth, pitch angle and GPS information, it can obtain the three-coordinate values ​​of the target. Radar can detect targets during the day or at night, and is not affected by bad weather such as wind, cloud, rain, fog, etc., and has the ability to detect all-weather. However, radar will only respond to moving targets that exceed the speed detection threshold, and for slow targets whose speed is lower than the detection threshold, radar will often respond with "ignoring", which fails to achieve the purpose of detection. Modern "low, slow and small" targets are generally composed of composite materials, plastic foam, etc. These materials have wave-transmitting characteristics, making the targets low in detectability; and the metal materials such as motors, engines, batteries, wires, etc. of "low, slow and small" targets are small in size, which greatly reduces the radar reflection cross-section of the target itself, reduces the distance and probability of detection by radar, and shortens the response time of subsequent disposal. In addition, "low, slow and small" targets usually fly at a low altitude, and the influence of ground clutter will also add some difficulties to the search and detection of ground radars.

[0056] Photoelectric detection: Photoelectric detection technology mainly includes laser detection, infrared detection and visible light detection. It uses imaging technology to collect drone images for analysis, comparison and feature extraction to achieve target detection and identification. Compared with other detection methods, it can intuitively reflect the contour characteristics of the target and can identify the shape and type of the target. However, as a "low, slow and small" target, it is small in size and has low visible light and infrared radiation characteristics, which greatly shortens the detection distance through visible light and infrared detection. Similarly, the reflected echo of the target detected by laser radar is weaker, which makes photoelectric detection more difficult. In addition, photoelectric detection is greatly affected by weather. Light, visibility, clouds, rain, fog, etc. will affect the detection distance of photoelectric detection and the probability of detecting the target.

[0057] Acoustic detection: Acoustic detection relies on specific sound wave signals generated by the motor or rotor of the drone during flight, mainly in the frequency range of 0.3 to 20kHz. The sound sensor receives and detects the signals, and uses voiceprint recognition technology to match the collected signals with the drone audio database to achieve detection and classification of the drone.

[0058] Radio detection technology: Radio detection technology obtains the waveform of the control signal by scanning the frequency band of the drone remote control signal, and then compares the control waveform in the system library to determine whether the remote-controlled drone exists and determine its category and model; the main disadvantage of radio detection technology is that the measurement accuracy is low and it cannot monitor cruise electromagnetic silent drones.

[0059] This application uses laser to detect drones. Compared with the above existing detection methods, it has the following advantages: the device is small in size, light in weight, and easy to carry; it has a rail interface and can be installed on a firearm to achieve detection and strike integration; it can distinguish between drones and birds; it can confirm whether the drone is conducting reconnaissance and taking photos of us, assess threats, and assist in evidence collection; even if the drone is in radio silence, mute, or the camera is not working, the drone can be found. The present invention has been verified by experiments to achieve the expected function and good detection effect.

[0060] In addition, it is worth noting that the present application uses a laser emission module (100) to emit laser to detect drones, which is based on laser active detection technology and is somewhat similar to the laser radar technology in the photoelectric detection technology, with the following differences: Different principles: Laser radar is the abbreviation of laser detection and ranging system. It measures the propagation distance between the sensor transmitter and the target object, analyzes the reflected energy size, amplitude, frequency and phase of the reflected spectrum on the surface of the target object, and thus presents accurate three-dimensional structural information of the target object. The ranging principle is currently mainly based on the time-of-flight method, which uses the time interval between the pulse signal emitted by the transmitter and the reflected pulse signal received by the receiver to calculate the distance to the target object. Laser radar constructs the three-dimensional structure of the entire scene, while laser active detection technology is only used to receive the intensity information of the laser reflected by the object. Different light source output characteristics: Laser radar generally arranges multiple lasers into an array, and each unit light wave can be independently controlled. Under the control of the program, one or more beams can be directed according to the design to achieve airspace scanning. And because there is an angle between the two laser beams of the laser radar, the farther the distance, the greater the minimum size that can be detected by the radar detection, and there is a detection blind spot for small targets. Laser active detection uses only one laser beam, and there is no need to control the laser for scanning, so there is no detection blind spot. Response speed: LiDAR needs to perform laser scanning and construct a three-dimensional scene after receiving target information. It requires high computing power and has a slow response speed. Others: Relatively speaking: LiDAR is expensive, large in size, and consumes a lot of power; laser active detection is low in cost, simple in structure, small in size, and easy to integrate into firearms.

[0061] In order to solve the threat of drones, the present invention proposes a small, light and easy-to-carry sight. It uses laser to emit towards the drone, and the objective lens receives the returned external signal and forms an image in the detector. The back-end image processing algorithm is used to locate the position of the drone, thereby improving the ability to identify drones at a long distance, improving the accuracy of attacking drones, and enhancing safety. It has strong application value.

[0062] In one embodiment, if Figure 1 , Figure 3As shown, the laser emission module (100) comprises a laser (110) and a beam shaping component (120), wherein the laser (110) is used to emit a detection laser, and the beam shaping component (120) is located in front of the detection laser emission direction of the laser (110), and the beam shaping component (120) is used to expand and homogenize the detection laser.

[0063] Considering that the equipment can be mounted on a firearm, a semiconductor laser with a relatively small volume is selected for the laser (110). The near-infrared band with low atmospheric attenuation is selected, and commonly used ones are 808nm, 905nm, 1550nm, etc. Take the 808nm laser as an example, the power is 200W. The pulse working mode is selected as the working mode, and the detection distance is increased through the narrow bandwidth and high energy output. The beam shaping component (120) may further include a lens component (121) and a light homogenizer (122). The output light of the laser (110) generally has a small divergence angle. In order to expand the detection field of view, a beam expansion operation is required. The output light of the laser (110) is expanded into a circular or square shape through the lens component (121) and the light homogenizer (122). Its divergence angle should match the detection receiving field of view, and the laser reflection angle should be less than or equal to the imaging field of view angle to avoid unnecessary waste of laser energy due to the laser divergence angle far exceeding the detection receiving field of view. The laser spot is mostly Gaussian distributed, with high energy in the middle and weak energy at the boundary. This distribution characteristic introduces background noise to the later analysis of the drone's reflection intensity. In order to avoid the uneven distribution of laser energy introducing noise or false alarms into the later image processing, the laser beam needs to be homogenized. Components such as light homogenizers (122), frosted glass, and holographic diffusers can be used to homogenize the laser beam to ensure the uniformity of the laser output by the laser emission module (100) and reduce the noise introduced by the energy difference at each point of the laser beam. More specifically, a lens component (121) is used to expand the laser beam, and the divergence angle is shaped to 5°. After shaping, the output is a circular light spot with a diameter of 5°; light homogenizers such as frosted glass and holographic diffusers are used. This embodiment uses a holographic diffuser to homogenize the laser so that the laser uniformity reaches more than 80%. Compared with frosted glass, the use of a holographic diffuser has lower laser loss. The homogenized laser can avoid false alarms caused by uneven energy. The laser emission module (100) is installed at a middle position of the housing (500) near the objective lens (210), and is parallel to the Picatinny interface through an axis alignment, thereby ensuring parallelism with the gun barrel.

[0064] In one embodiment, the imaging assembly (200) includes an objective lens (210), a filter (230), a detector (220), and an image processing circuit. The objective lens (210) is used to receive external light radiation, the filter (230) is located between the objective lens (210) and the detector (220), the filter (230) is used to filter light, the detector (220) is connected to the image processing circuit, the image processing circuit is connected to the main control module (300), and the detector (220) is used to obtain image information.

[0065] The objective lens (210) has a working wavelength range of 380nm to 1000nm, covering the wavelength range of the emitted laser, and a focal length of 90mm. The detector (220) is mainly used for imaging. The detector (220) can be selected from CCD, CMOS, low-illumination solid imaging devices, short-wave detectors, etc., but it needs to cover the laser band. The laser used in laser active detection is mainly in the near-infrared band. According to the laser wavelength, a detector (220) with a higher response to the laser in this band can be selected. This embodiment selects a low-illumination fixed imaging device, which can be used for day and night observation, and has a higher response sensitivity in the near-infrared band and a long detection distance. The detector (220) has a resolution of 1280×1024, a pixel size of 9.7 microns, and a response band of 400nm to 1100nm. The detector (220) has two imaging modes and is used in conjunction with the filter (230). The filter (230) includes a bandpass filter, a narrowband filter and a switching element. The bandpass filter and the narrowband filter are used for filtering. The switching element is connected to the bandpass filter and the narrowband filter. The switching element is used to move one of the bandpass filter and the narrowband filter between the objective lens (210) and the detector (220) to achieve the switching of the bandpass filter and the narrowband filter. The bandpass filter is used for selecting the band of external scene imaging. For visible light imaging, a 380nm to 780nm bandpass filter can be selected; the narrowband filter is used for laser imaging, and only light consistent with the laser wavelength is allowed to pass through to avoid the influence of non-active irradiation light source on laser imaging. An 808nm narrowband filter can be selected to prevent other light sources from entering and causing false alarms. The switching element can be a micro motor, or any structure in the prior art that can be moved to switch the position of the bandpass filter and the narrowband filter. The two imaging modes will be described in detail later.

[0066] In one embodiment, the display module (400) includes a display screen (410), an eyepiece (420), an eyepiece focusing member (430), a power switch (440) and an eye mask (450); the display screen (410) is used to display according to image information and drone information; the eyepiece (420) is located on a display side of the display screen (410); the eyepiece (420) is used to magnify the display content of the display screen (410); the eyepiece focusing member (430) is connected to the eyepiece (420) to adjust the position of the eyepiece (420); the power switch (440) is connected to the display screen (410) to turn the display screen (410) on and off; and the eye mask (450) is located on a side of the eyepiece (420) away from the display screen (410).

[0067] The display screen (410) may be a micro OLED display screen. For example, the display screen (410) may be a 1280×1024 resolution micro display screen, and may display the image transmitted by the detector (220) in a 1:1 ratio. The display screen (410) is used to display the image information and drone information transmitted by the imaging component (200). The drone information may specifically be an identifier of the drone location. The eyepiece (420) is used to amplify the image on the display screen (410). A large exit pupil design is used to amplify the image on the display screen (410) for easy observation. At the same time, the eyepiece (420) is designed with an eyepiece focusing member (430). The eyepiece focusing member (430) may be a hand wheel, which may be suitable for operators with different vision, such as being suitable for use by people within a range of -4 to +4 diopters. A power switch (440) is connected to the display screen (410) and is used to control the on and off of the power supply to the display screen (410) to control the opening and closing of the display screen (410). The eye mask (450) is a cylindrical structure that fits the facial contour around the human eye and blocks light between the human eye and the eyepiece (420) for better observation. The eye mask (450) can be made of rubber material to protect the human eye while blocking light.

[0068] The main control module (300) of the present application is used to control the laser (110), the filter (230) and the detector (220) to work synchronously to realize timing control; process the image of the detector (220), send it to the display screen (410) for display, and extract and mark the target signal of the drone. At the same time, with the help of switches and buttons, the image observation, drone detection, aiming and grading display function control, and parameter configuration of the laser, filter (230), detector (220), eyepiece (420) and the like are realized.

[0069] The following example uses a more specific implementation method to provide a more detailed description of the sight for detecting drones:

[0070] During installation, the eye mask (450) is installed on the eyepiece (420), and the eyepiece focusing member (430) forms an eyepiece assembly which is installed on the housing (500) by screws, and the power switch (440) is also installed on the housing (500); the detector (220) and the image processing circuit form a core assembly which is assembled with the display screen (410) and fixed to the housing (500) by screws; the laser (110) and the beam shaping assembly (120) are installed at the upper end of the outer side of the housing (500); and the main control module (300) is installed inside the housing (500). The filter (230) is installed inside the objective lens focusing hand wheel, and is installed in the reserved hole of the housing (500) after being combined with the objective lens (210); the battery compartment (710) and the battery box cover switch (720) are assembled and installed on the housing (500), and the power module (700) is powered by a 18650 or 5# battery; the mounting interface (600) is connected to the housing (500) with screws after the above components are assembled, and then fixed to the rifle through the mounting interface (600), such as a Picatinny interface.

[0071] According to the functional division, the laser emission detection component is divided into two major functional groups: signal emission and signal reception and processing functions. To complete the corresponding functions, the laser emission module (100) includes a laser (110) and a beam shaping component (120) which are integrated and assembled to form a component installed in front of the gun sight to facilitate unobstructed laser emission. The laser uses a near-infrared semiconductor laser and the working mode is set to a pulse mode; the signal reception function is completed by the objective lens (210), which is installed in the extended objective lens barrel. The lens position is located at the front of the housing (500) to facilitate unobstructed reception of the scene feature information returned by the laser. A filter (210) is placed between the end of the objective lens (210) and the front end of the detector (220). 30), the filter is used in two different working modes. In the imaging mode, the filter (230) uses a wide band for imaging color scenes in the field of view. In the detection mode, a narrow band filter consistent with the laser light source is used to only accept the light reflected in the band after laser irradiation. The detector (220) is installed inside the housing (500) and is located at the end of the objective lens barrel. It receives the scene transmitted back by the objective lens (210) and forms an image, and transmits the information to the image processing module in the main control module (300). Then, the image information is transmitted to the display screen (410) for display, thereby completing the signal reception and processing functions.

[0072] On the other hand, Figure 6 As shown, the present invention also provides a method for controlling a sight of a detection drone, which is used to control the sight of a detection drone as described above, and the method comprises:

[0073] S1. Control the laser emission module (100) to emit detection laser.

[0074] The main control module (300) controls the laser (110) to emit laser light, and the emitted light is expanded and homogenized through the lens assembly (121) and the light homogenizer (122).

[0075] S2, acquiring image information of the imaging component (200), extracting drone information based on the image information, and sending the image information and drone information to the display module (400) for display.

[0076] The objective lens (210) receives the external scene information and enters the detector (220). The detector (220) receives the light signal and transmits it to the main control module (300) after imaging. Through the timing control, the laser emission, the filter (230) selection, and the detector (220) work synchronously. At the same time, the switches and buttons are coordinated to realize the image observation, drone detection, aiming and grading display function control. After further processing, the image is transmitted to the display screen (410) for display. After the laser is turned on, it is emitted. The user raises the gun aiming device to customize the direction. If a drone appears in front, the laser beam is reflected. The image received by the detector (220) extracts the drone signal according to the intensity of the reflected light.

[0077] The task workflow during use is as follows: turn on the laser and search the target area; detect the drone signal, automatically output the target status (there is a drone flying / the drone is scouting us) and target position (displayed in the form of a box) in real time, and move the gun aiming scale to the target position and shoot according to the system prompt information.

[0078] Among them, the drone information specifically refers to the drone position information and aiming point information. The image information and the drone information are sent to the display module for display. The specific steps are: display the image according to the image information, frame the drone position on the image information according to the drone position information and the aiming point information, and superimpose the cross scale and the drone strike aiming scale on the display interface. Obtain the image information of the imaging component, extract the drone information according to the image information, and send the image information and the drone information to the display module for display. The specific steps are: obtain the image information of the imaging component, extract the highlight area features according to the image information, if the highlight area has the drone outline characteristics, send the image information and the first type of drone information to the display module for display; if the highlight area is a circle, send the image information and the second type of drone information to the display module for display.

[0079] A planar laser beam is used to illuminate the sky area. When there is an object in the sky, the surface of the object is reflected, and the reflected light spot is imaged on the detector (220) through the receiving objective lens (210). The laser image received by the detector (220) is processed to extract the target contour features and determine whether it is a drone. When the laser is irradiated to the optical camera mounted on the drone, due to the cat's eye effect, the reflection intensity of the detection surface through the camera lens is several orders of magnitude higher than the reflection intensity of the surface of other parts of the drone. At this time, the laser echo feature received by the detector (220) is a bright spot (camera reflection), and other areas are very dark. If no bright spot is detected, only the target contour feature meets the drone feature, and the first drone information is sent. In a more specific embodiment, the first drone information includes drone position information and first aiming point information, and the first aiming point information includes a first frame selection method, and the image information and the first drone information are sent to the display module for display. The specific steps are: displaying an image according to the image information, selecting the position of the drone in the first way on the image information according to the drone position information and the first aiming point information, and superimposing a cross scale and a drone strike aiming scale on the display interface. The first way to select the position of the drone can be to select it in the first frame shape or color, such as a square red frame. When the bright spot is detected, it means that the drone is conducting reconnaissance on our side, and then the second drone information is sent, the second drone information includes the drone position information and the second aiming point information, and the second aiming point information includes the second frame selection method, and the image information and the second drone information are sent to the display module for display. The specific steps are: displaying an image according to the image information, selecting the position of the drone in the second way on the image information according to the drone position information and the second aiming point information, and superimposing a cross scale and a drone strike aiming scale on the display interface. The second way to select the position of the drone can be to select it in the second frame shape or color, such as a round green frame, so that it can be distinguished whether it is conducting reconnaissance on our side.

[0080] In a more specific embodiment, the laser emission module (100) is controlled to emit a detection laser. The specific steps are: the imaging component (200) is controlled to switch between the imaging mode and the detection mode at a preset frequency, in the imaging mode, the laser emission module (100) is controlled to stop emitting the detection laser, and the bandpass filter of the imaging component (200) is controlled to be located between the objective lens (210) and the detector (220) of the imaging component (200), in the detection mode, the laser emission module (100) is controlled to emit a detection laser of a preset duration, and the narrowband filter of the imaging component (200) is controlled to be located between the objective lens (210) and the detector (220) of the imaging component (200). The image information of the imaging component (200) is obtained, the drone information is extracted according to the image information, and the image information and the drone information are sent to the display module (400) for display. The specific steps are: acquiring image information of the imaging component (200), extracting drone information based on the image information in the detection mode, and sending the image information and drone information to the display module (400) in the imaging mode for display.

[0081] There are two imaging modes, the first one is the imaging mode. Figure 4 As shown, in this mode, the device does not emit laser light, and the detector (220) only passively receives and images the external scene, such as visible light color imaging, and the image is sent to the display module (400) for display, so that the external scene can be observed vividly and intuitively. The resolution of the detector (220) is generally high, and the frame rate can be reduced to 25Hz for display, which is comfortable for human eyes to observe. Figure 4 The b signal is the signal received by the bandpass filter, and the d signal is the image displayed by the display module (400). The display module (400) displays the image for a period of time t1 and then repeats the display after a period of time t2. The specific values ​​of t1 and t2 can be set as needed. The second is the detection mode. In this mode, the device emits a laser, and the detector (220) images the laser. What is generated is an image of grayscale differences caused by the strength of the laser reflected by the external scene. The image is sent to the main control module (300) for image processing and target extraction, and finally only the target position is transmitted to the display module (400) and superimposed on the display screen (410). In order to ensure that the image can be observed normally in the detection mode, while reducing the laser energy loss and extending the working time, the laser can be selected to work in pulse form in the detection mode. Figure 5 As shown, the detection mode and the imaging mode are switched at a preset frequency. When the device performs the operation of detecting the drone, the bandpass filter and the narrowband filter are switched back and forth, and the corresponding detector (220) is in two modes of switching back and forth, that is, emitting laser to enter the detection mode, and not emitting laser to enter the imaging mode.

[0082] like Figure 5As shown, signal a is the laser signal emitted by the laser (110), signal b is the signal received by the bandpass filter, signal c is the signal received by the narrowband filter, and signal d is the image displayed by the display module (400). In the detection mode, the bandpass filter is switched alternately at time T1 and the narrowband filter is switched alternately at time T2, and only the image at time T1 is input to the display screen (410) for display. The laser emission time is T3, and the time when no laser is emitted is T2-T3. The main control module (300) performs differential processing on the images collected by the detector (220) at time T3 and time T2-T3, eliminates the bright spots caused by the non-active irradiation light source, extracts the bright spots caused by the cat's eye effect of the optical lens of the drone, marks their positions, and superimposes them on the next frame of the imaging picture.

[0083] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A sight for detecting unmanned aerial vehicles, characterized in that: include: A laser emission module (100), used for emitting a detection laser; An imaging component (200) for acquiring image information; A main control module (300) and a display module (400), wherein the main control module (300) is connected to the laser emission module (100), the imaging component (200) and the display module (400), the main control module (300) is used to control the laser emission module (100) to emit laser light, and to extract drone information according to the image information, and the display module (400) is used to display according to the image information and the drone information.

2. The sight for detecting a UAV according to claim 1, characterized in that: The laser emission module (100) comprises a laser (110) and a beam shaping component (120), wherein the laser (110) is used to emit the detection laser, the beam shaping component (120) is located in front of the detection laser emission direction of the laser (110), and the beam shaping component (120) is used to expand and homogenize the detection laser.

3. The sight for detecting a UAV according to claim 1, characterized in that: The imaging component (200) comprises an objective lens (210), a detector (220), a filter (230) and an image processing circuit; The objective lens (210) is used to receive external light energy radiation, the filter (230) is located between the objective lens (210) and the detector (220), the filter (230) is used to filter light, the detector (220) is connected to the image processing circuit, the image processing circuit is connected to the main control module (300), and the detector (220) is used to obtain the image information.

4. The sight for detecting a UAV according to claim 3, characterized in that: The filter (230) comprises a bandpass filter, a narrowband filter and a switching element, wherein the bandpass filter and the narrowband filter are used for filtering light, and the switching element is connected to the bandpass filter and the narrowband filter and is used for switching the connection between the bandpass filter and the narrowband filter so that one of them is located between the objective lens (210) and the detector (220).

5. The sight for detecting a UAV according to claim 1, characterized in that: The display module (400) comprises a display screen (410), an eyepiece (420), an eyepiece focusing member (430), a power switch (440) and an eye mask (450); the display screen (410) is used for displaying according to the image information and the drone information; the eyepiece (420) is located on a display side of the display screen (410); the eyepiece (420) is used for magnifying the display content of the display screen (410); the eyepiece focusing member (430) is connected to the eyepiece (420) to adjust the position of the eyepiece (420); the power switch (440) is connected to the display screen (410) and is used for turning on and off the display screen (410); and the eye mask (450) is located on a side of the eyepiece (420) away from the display screen (410).

6. The sight for detecting a UAV according to claim 1, characterized in that: The sight for detecting the UAV also includes: A housing (500) and a mounting interface (600); The laser emission module (100), the imaging assembly (200), the main control module (300) and the display module (400) are all connected to the housing (500); The mounting interface (500) is connected to the housing (500), and the mounting interface (500) is used to be connected to a gun.

7. A method for controlling a sight of a detection drone, used to control the sight of a detection drone as claimed in any one of claims 1 to 6, characterized in that: The method comprises: Control the laser emission module to emit detection laser; The image information of the imaging component is acquired, the drone information is extracted according to the image information, and the image information and the drone information are sent to the display module for display.

8. The control method of the sight of the detection drone according to claim 7, characterized in that: Control the laser emission module to emit detection laser. The specific steps are as follows: Controlling the imaging component to switch between an imaging mode and a detection mode at a preset frequency; in the imaging mode, controlling the laser emission module to stop emitting the detection laser, controlling the bandpass filter of the imaging component to be located between the objective lens and the detector of the imaging component; in the detection mode, controlling the laser emission module to emit the detection laser of a preset duration, controlling the narrowband filter of the imaging component to be located between the objective lens and the detector of the imaging component; The image information of the imaging component is obtained, the drone information is extracted according to the image information, and the image information and the drone information are sent to the display module for display. The specific steps are as follows: The image information of the imaging component is acquired, and in the detection mode, the drone information is extracted according to the image information. In the imaging mode, the image information and the drone information are sent to the display module for display.

9. The control method of the sight of the detection drone according to claim 7, characterized in that: The drone information is specifically: UAV location information and aiming point information; The image information and the drone information are sent to the display module for display. The specific steps are as follows: The image is displayed according to the image information, the position of the drone is framed on the image information according to the drone position information and the aiming point information, and a cross scale and a drone strike aiming scale are superimposed on the display interface.

10. The control method of the sight of the detection drone according to claim 7, characterized in that: The image information of the imaging component is obtained, the drone information is extracted according to the image information, and the image information and the drone information are sent to the display module for display. The specific steps are as follows: Acquire image information of the imaging component, extract highlight area features according to the image information, and if the highlight area has a drone outline characteristic, send the image information and the first drone information to the display module for display; if the highlight area is a circle, send the image information and the second drone information to the display module for display; The first type of drone information includes drone position information and first type of aiming point information, and the first type of aiming point information includes a first frame selection method. The image information and the first type of drone information are sent to a display module for display. The specific steps are: Displaying an image according to the image information, selecting the position of the drone in a first manner on the image information according to the drone position information and the first aiming point information, and superimposing a cross scale and a drone strike aiming scale on a display interface; The second type of drone information includes drone position information and second type of aiming point information, and the second type of aiming point information includes a second frame selection method. The image information and the second type of drone information are sent to the display module for display. The specific steps are: The image is displayed according to the image information, the position of the drone is framed on the image information in a second manner according to the drone position information and the second aiming point information, and a cross scale and a drone strike aiming scale are superimposed on the display interface.

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