Device for actively detecting short-wave infrared aiming mirror

Abstract

The invention provides equipment for actively detecting a short-wave infrared aiming mirror, and relates to the field of photoelectric detection. The equipment comprises a short-wave infrared observation module, a detection resolving module, a main control module and a display module, wherein the short-wave infrared observation module is used for acquiring an image of an environment area; the detection resolving module comprises a target resolving unit and a laser detector, the laser detector is used for emitting detection laser, capturing the detection laser returned by a target object in an environment area and capturing position information of the returned detection laser, and enhancing the returned detection laser through signal processing; the target resolving unit is used for determining a display screen coordinate corresponding to the target object based on the first image and the second image collected by the short-wave infrared observation module through an image difference mode and a threshold value analysis mode, and sending the display screen coordinate to the main control module; and the main control module is used for framing the coordinates of the display screen and controlling the display module to display the environment area, the target object and the framing.

Description

Technical Field

[0001] The present application relates to the field of photoelectric detection, and in particular to a device for actively detecting short-wave infrared sights. Background Art

[0002] Currently, global research on counter-sniper technology and the development of related products are primarily focused on three key areas: acoustic detection, infrared detection, and laser detection. While acoustic and infrared detection technologies can accurately locate snipers, they are passive detection methods, typically only revealing their location after the sniper has fired. Compared to passive detection technologies, active detection systems using lasers can detect potential snipers in advance, enabling preemptive detection and strike, which is tactically more advantageous.

[0003] Active laser detection technology is based on the "cat's eye effect." This principle states that when a laser strikes a sniper scope, the light is focused by a lens onto a reflective surface (such as a photosensitive surface or reticle). It then reflects back along its original path, forming a highly directional, energy-concentrated echo. The intensity of this reflected light (echo) is 2-4 orders of magnitude higher than that of ordinary diffuse reflection, similar to the bright reflection of a cat's eye in the dark. By detecting reflected light, which is far stronger than the surrounding light, the sniper's position can be located. Because the power density of the echo signal does not decay rapidly over long distances, active detection methods can detect targets at greater distances than passive detection methods. Furthermore, active laser detection systems offer higher positioning accuracy and faster detection speeds. Consequently, active laser detection technology has garnered widespread attention in anti-sniper research and holds significant development potential.

[0004] Currently, anti-sniper optoelectronic detection lasers primarily operate in the near-infrared band, such as 808nm and 910nm. To evade detection by these systems, snipers have begun using short-wavelength infrared scopes or coating their scopes with near-infrared cutoff films. These films block near-infrared light in the 750nm to 1200nm band, reducing the average transmittance to less than 3%. This makes it difficult or impossible for existing anti-sniper optoelectronic detection systems to detect the scopes, reducing their effectiveness.

[0005] Therefore, how to detect and discover short-wave infrared sights or sights with near-infrared cutoff films on their glass windows has become an urgent problem to be solved. Summary of the Invention

[0006] In view of this, an embodiment of the present application provides a device for actively detecting short-wave infrared scopes, including: Short-wave infrared observation module, detection and solution module, main control module and display module; Wherein, the short-wave infrared observation module is used to collect images of the environmental area; The detection and resolution module includes a target resolution unit and a laser detector, wherein the laser detector is used to emit a detection laser, capture the detection laser returned by the target object in the environmental area, and capture the position information of the returned detection laser, and enhance the returned detection laser through signal processing. The target resolution unit is used to determine the display screen coordinates corresponding to the target object based on the first image and the second image captured by the short-wave infrared observation module through image difference and threshold analysis, and send the display screen coordinates to the main control module, wherein the first image is the image captured by the short-wave infrared observation module when the laser detector emits the detection laser, and the second image is the image captured by the short-wave infrared observation module when the laser detector does not emit the detection laser; The main control module is used to mark the coordinates of the display screen and control the display module to display the environmental area, the target object and the marked frame.

[0007] The above-mentioned device for actively detecting short-wave infrared sights according to the embodiment of the present application may also have the following additional technical features: In the above technical solution, optionally, the target solving unit performs an image difference method, including: Performing Gaussian filtering to remove noise on an input image, where the input image includes the first image and the second image; The Roberts operator is used to calculate the gradient magnitude of the input image. Dividing the input image into a plurality of sub-blocks, calculating the grayscale mean and standard deviation of each sub-block, and calculating the adaptive threshold within the sub-block according to the grayscale mean and the standard deviation; Segmenting the input image by the gradient amplitude and the adaptive threshold to obtain a first cat's eye region; Performing morphological post-processing on the first cat's eye region in sequence to obtain a second cat's eye region; The contour of the second cat's eye area is extracted, and the ellipse equation is fitted using the least squares method, and the target cat's eye area is screened out according to the conditions of eccentricity and area.

[0008] In any of the above technical solutions, optionally, the target solving unit performs a threshold analysis method, including: The obtained signal value corresponding to the target cat's eye area is compared with a preset threshold, and pixel points with signal values ​​greater than the preset threshold are screened out, thereby determining the display screen coordinates of the target object.

[0009] In any of the above technical solutions, optionally, the shortwave infrared observation module includes a shortwave infrared core and a shortwave infrared objective lens, the frame rate of the shortwave infrared objective lens matches the emission frequency of the laser detector, and the clock is synchronized by the main control module.

[0010] In any of the above technical solutions, optionally, the method further includes: A housing assembly, the housing assembly comprising a front panel, an intermediate housing, and a rear panel, wherein a sealed cavity is formed within the housing assembly; The detection and solution module is arranged in the sealed cavity; the front panel is provided with a laser emitting window and a laser receiving window, the laser emitting window is used to emit detection laser, and the laser receiving window is used to receive the returned detection laser.

[0011] In any of the above technical solutions, optionally, the front panel, the intermediate housing, and the rear panel are sealed by screws and a conductive sealing ring; The laser detector uses a wavelength range of 1530nm to 1560nm; A 1550nm narrowband filter is set at the front end of the laser receiving window. The half-peak width of the narrowband filter is 10±2nm and the transmittance is greater than 30%.

[0012] In any of the above technical solutions, optionally, the method further includes: The heat dissipation structure is used to dissipate heat from the detection and solution module.

[0013] In any of the above technical solutions, optionally, a thermally conductive silicone pad is provided on the heat dissipation structure to conduct the heat of the detection and resolution module to the housing group of the device for actively detecting short-wave infrared sights.

[0014] In any of the above technical solutions, optionally, the method further includes: A positioning module, the positioning module is used to determine the actual coordinate information of the target object; The positioning module includes a Beidou positioning module, an electronic compass and a laser rangefinder. The Beidou positioning module is used to locate the latitude and longitude coordinates of its own observation point, the electronic compass is used to display the azimuth information of the target object relative to its own observation point in real time, and the laser rangefinder is used to measure the distance of the target object relative to its own observation point.

[0015] In any of the above technical solutions, optionally, the main control module is also used to receive user operation instructions, control the short-wave infrared observation module, the detection and solution module, the main control module, the display module and the positioning module according to the user operation instructions, complete corresponding operation functions, and receive data information and status information of the short-wave infrared observation module, the detection and solution module, the main control module, the display module and the positioning module to monitor the module operation status.

[0016] The active detection shortwave infrared scope device of the present application embodiment has the functions of long-range observation, detection, and positioning. The shortwave infrared observation module used in the device can improve the imaging quality of the device in bright daylight and can also observe through fog. Shortwave infrared is less affected by environmental factors and can detect most materials at night using atmospheric glow and night sky light, thus expanding the application range of the device. The active detection shortwave infrared scope device of the present application embodiment can not only effectively detect and automatically mark the spatial position and distance of hostile shortwave infrared scopes, but also accurately identify targets and effectively eliminate interfering targets in the field of view, ensuring the accuracy of imaging detection while also having the anti-interference ability of non-imaging detection. Through active and passive image difference, it can identify subtle characteristics of targets, thereby identifying and eliminating targets outside the scope of observation. It can detect potential threat sources at long distances, over a large area, and with high probability in complex backgrounds, quickly discover and accurately locate them, ensuring rapid detection when targets are present and no or few false alarms when targets are absent.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It shows one of the structural schematic diagrams of the device for active detection of short-wave infrared sights according to an embodiment of the present application; Figure 2 The second structural diagram of the device for actively detecting short-wave infrared sights according to an embodiment of the present application is shown; Figure 3 A schematic diagram of the main interface of a device for actively detecting short-wave infrared sights according to an embodiment of the present application is shown; Figure 4A comparison diagram of image difference data when detecting a short-wave infrared sight at 200m is shown in an embodiment of the present application; Figure 5 A comparison diagram of image difference data when detecting a short-wave infrared sight at 500m is shown in an embodiment of the present application; Figure 6 One of the working principle diagrams of the device for actively detecting short-wave infrared sights according to an embodiment of the present application is shown; Figure 7 The second working principle diagram of the device for actively detecting short-wave infrared sights according to an embodiment of the present application is shown.

[0019] The corresponding relationship between component names and reference numerals is as follows: Shortwave infrared observation module 1, detection and solution module 2, main control module 3, display module 4, OLED display screen 41, eyepiece group 42, anti-light leakage eye mask 43, front panel 5, intermediate shell 6, rear panel 7, Beidou positioning module 8, electronic compass 9, laser rangefinder 10, power module 11, "photo / video" button icon 101, "menu" function button icon 102, "distance measurement" button icon 103, "detection" button icon 104, shortwave infrared sight mark 105. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0021] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0022] Below, in conjunction with the accompanying drawings, the device for actively detecting short-wave infrared sights provided by the embodiments of the present application is described in detail through specific embodiments and their application scenarios. Unless there is a conflict, the following embodiments and features in the embodiments can be combined with each other.

[0023] The embodiment of the present application provides a device for actively detecting and automatically marking short-wave infrared sights, such as Figure 1 and Figure 2 As shown, the equipment for actively detecting short-wave infrared sights includes: Short-wave infrared observation module 1, detection and solution module 2, main control module 3 and display module 4; Among them, the short-wave infrared observation module 1 is used to collect images of the environmental area; The detection and resolution module 2 includes a target resolution unit and a laser detector. The laser detector is used to emit a detection laser, capture the detection laser returned by the target object in the environmental area, and capture the position information of the returned detection laser, and enhance the returned detection laser through signal processing. The target resolution unit is used to determine the display screen coordinates corresponding to the target object based on the first image and the second image captured by the short-wave infrared observation module through image difference and threshold analysis, and send the display screen coordinates to the main control module 3. The first image is the image captured by the short-wave infrared observation module 1 when the laser detector emits the detection laser, and the second image is the image captured by the short-wave infrared observation module 1 when the laser detector does not emit the detection laser. The main control module 3 is used to mark the coordinates of the display screen and control the display module 4 to display the environment area, target object and the marked frame.

[0024] In this embodiment, the short-wave infrared observation module 1 constitutes a passive observation system, the detection and solution module 2 constitutes an active detection channel, and the target object to be detected and marked is a short-wave infrared sight.

[0025] In one embodiment, the short-wave infrared observation module 1 includes a short-wave infrared core and a short-wave infrared objective lens, which can observe targets through glass during the day and through fog in severe weather such as heavy fog.

[0026] The laser detector in the detection and solution module 2 is a pulsed type. Its emission frequency matches the frame rate of the short-wave infrared objective lens and is synchronized through external triggering. A continuous wave laser can also be used. The laser detector uses a wavelength band of 1530nm to 1560nm. Preferably, the laser detector detects the target by emitting a 1550nm laser. When the laser contacts the short-wave infrared sight, due to the reflective characteristics of the sight, the returned laser energy will be significantly higher than the reflected energy of the surrounding environment. The laser detector captures these reflected laser signals and their position information, and then enhances these signals through signal processing.

[0027] The target resolution unit is responsible for generating the timing pulses required by the CCD camera and processing the reflected detection laser signal. The target resolution unit determines the position of the shortwave infrared sight, and therefore the display screen coordinates of the shortwave infrared sight, through image differentiation and threshold analysis. Specifically, it first captures two sets of signals, namely the first image and the second image, from the laser detector when it is emitting the detection laser and when it is not. By performing image differentiation, a pure laser echo signal is obtained, eliminating background noise interference. The resulting signal is then compared with a preset threshold to screen out pixels with stronger signals, and the display screen coordinates of the shortwave infrared sight are determined accordingly.

[0028] In one embodiment of the present application, the target solution unit performs an image difference method, including: Performing Gaussian filtering to denoise an input image, where the input image includes a first image and a second image; The Roberts operator is used to calculate the gradient magnitude of the input image; The input image is divided into multiple sub-blocks. For each sub-block, the grayscale mean and standard deviation of the sub-block are calculated, as well as the adaptive threshold within the sub-block calculated based on the grayscale mean and standard deviation. The first cat's eye region is obtained by segmenting the input image using gradient amplitude and adaptive threshold; Performing morphological post-processing on the first cat's eye region in sequence to obtain a second cat's eye region; The contour of the second cat's eye area is extracted, and the ellipse equation is fitted using the least squares method, and the target cat's eye area is screened out according to the conditions of eccentricity and area.

[0029] In the embodiment of the present application, the cat's eye target extraction method based on image difference specifically includes the following steps: (1) Image preprocessing: input image Perform Gaussian filtering to denoise, the formula is as follows:

[0030] Where σ is the standard deviation of the Gaussian kernel, is the center coordinate of the convolution kernel, Represents the convolution operation.

[0031] Then grayscale normalization is performed to map the pixel values ​​to the [0,1] interval. The mapping formula is:

[0032] Among them, I min and I max are the minimum and maximum grayscale values ​​in the image respectively.

[0033] (2) Gradient calculation: The Roberts operator is used to calculate the horizontal and vertical gradients of the image, and then the gradient amplitude M(x,y) is calculated.

[0034] The horizontal gradient is:

[0035] The vertical gradient is:

[0036] The gradient amplitude is:

[0037] (3) Adaptive threshold segmentation: Divide the image into n×n sub-blocks, and calculate the grayscale mean for each sub-block and standard deviation , calculate the adaptive threshold T(x,y) within the sub-block according to the following formula:

[0038] Where k is the adjustment coefficient.

[0039] Then, the initial cat's eye region, also known as the first cat's eye region ROI, is obtained through threshold segmentation: ROI={M(x,y)>T(x,y)} (4) Morphological post-processing: The first cat's eye region ROI extracted initially is subjected to dilation and erosion operations in sequence to optimize the target shape and obtain the second cat's eye region.

[0040] The expansion operation formula is:

[0041] The corrosion operation formula is:

[0042] Among them, K is the structural element, and the above operation is used to connect the broken areas and eliminate small noises.

[0043] (5) Ellipse fitting and screening: Extract the contour of the second cat's eye area after morphological processing, use the least squares method to fit the ellipse equation, and screen out the final target cat's eye area based on the eccentricity and area conditions.

[0044] The equation of the ellipse is:

[0045] The eccentricity is:

[0046] The area is: S∈[Smin , S max ] Among them, S min and S max The lower and upper limits of the area threshold range are set.

[0047] In one embodiment of the present application, the target solution unit performs a threshold analysis method, including: comparing the signal value corresponding to the target cat's eye area with a preset threshold, screening out pixel points with signal values ​​greater than the preset threshold, and thus determining the display screen coordinates of the target object.

[0048] The detection and solution module 2 adopts the DSP+FPGA heterogeneous hardware architecture design, and undertakes key tasks such as real-time transmission, high-speed processing, intelligent analysis and precise control of video signals and various control signals.

[0049] Furthermore, after the detection and solution module 2 obtains the display screen coordinates of the target object, the display screen coordinates are transmitted to the main control module 3 , and the main control module 3 marks the display screen coordinates and controls the display module 4 to display them.

[0050] In one embodiment, the display module 4 includes an OLED display 41, an eyepiece assembly 42, and a light-proof eye mask 43. The OLED display 41 is used to display the processed environment, target object, and marked frame in real time. On the OLED display 41, the target object is marked with a flashing light signal and a red warning frame, enabling automatic labeling and visual identification of the target object. The eyepiece assembly 42 is designed with a focusing mechanism. Using a focusing knob, people with different vision can observe the display image clearly.

[0051] In one embodiment of the present application, the device further comprises: Positioning module, the positioning module is used to determine the actual coordinate information of the target object; The positioning module includes a Beidou positioning module 8, an electronic compass 9 and a laser rangefinder 10. The Beidou positioning module 8 is used to locate the latitude and longitude coordinates of its own observation point, the electronic compass 9 is used to display the azimuth information of the target object relative to its own observation point in real time, and the laser rangefinder 10 is used to measure the distance of the target object relative to its own observation point.

[0052] In this embodiment, the positioning module includes a Beidou positioning module 8, an electronic compass 9, and a laser rangefinder 10. The laser rangefinder 10 is used to measure the distance from the target object to the location where the active short-wave infrared detection scope is installed, thereby obtaining the distance to the target object. The electronic compass 9 is used to display the target object's position relative to the observation point of the active short-wave infrared detection scope in real time. The Beidou positioning module 8 is used to determine the latitude and longitude coordinates of the active short-wave infrared detection scope. The Beidou positioning module 8, in conjunction with the electronic compass 9 and laser rangefinder 10, can locate the target object and determine its actual coordinates.

[0053] In one embodiment of the present application, the device further comprises: Data transmission interface, used for program upgrade, data transmission, external display and product debugging, etc.

[0054] In one embodiment of the present application, the device further comprises: The power module 11 is used for power supply and has battery reverse connection protection and power monitoring functions.

[0055] In one embodiment of the present application, the device further comprises: Control buttons: The surface of the control buttons is provided with prompt icons for easy operation.

[0056] In one embodiment of the present application, the device further comprises: The housing group includes a front panel 5, an intermediate housing 6, and a rear panel 7, and a sealed cavity is formed in the housing group; The detection and solution module 2 is arranged in the sealed cavity; the front panel 5 is provided with a laser emission window and a laser receiving window, the laser emission window is used to emit the detection laser, and the laser receiving window is used to receive the returned detection laser.

[0057] Among them, a 1550nm narrowband filter is set at the front end of the laser receiving window. The half-peak width of the narrowband filter is 10±2nm and the transmittance is greater than 30%.

[0058] In this embodiment, the housing assembly consists of a front panel 5, an intermediate housing 6, and a rear panel 7, forming a sealed cavity. Both sides of the intermediate housing 6 are equipped with buckles for securing the wristband. The front panel 5 is provided with a laser emission window and a laser receiving window for the detection and resolution module 2. The laser emission window is used to emit detection laser light, and the laser receiving window is used to receive the returned detection laser light. The target resolution unit and laser detector are built into the sealed cavity.

[0059] A 1550nm narrowband filter is added in front of the laser receiving window. The half-peak width of this filter is 10±2nm and the transmittance is greater than 30%. It can filter out background diffuse reflections and eliminate false alarms.

[0060] In one embodiment of the present application, the short-wave infrared objective lens is mounted and fixed on the front panel 5, and the fixing method is the shaft-hole-end-face fixing method. The short-wave infrared core is fixed to the rear end of the short-wave infrared objective lens through the lens barrel adapter.

[0061] The detection and resolution module 2 is fixed on the front panel 5 via an adapter bracket.

[0062] In one embodiment, the OLED display screen 41 includes a driver chip and an OLED display. The driver chip is mounted on the main control module 3, and the OLED display is mounted on the inner sidewall of the rear panel 7, facing the eyepiece assembly 42. The driver chip and OLED display are connected via a connector. The eyepiece assembly 42 is fixed to the rear panel 7 via an axial hole and an end-face fixing method. A light leakage prevention eye shield 43 is mounted on the rear end of the housing to prevent the OLED screen from being obscured in strong light.

[0063] In one embodiment, the Beidou positioning module 8, the power module 11, the control buttons, etc. are fixed to the intermediate housing 6 by screws and pressure rings, and the electronic compass 9 is mounted on the short-wave infrared objective lens by screws.

[0064] The laser rangefinder 10 is fixed to the front panel 5 via a laser fixing frame, and can be slightly adjusted in pitch and azimuth relative to the front panel 5 to ensure that the optical axis of the laser rangefinder 10 is consistent with the observation optical axis.

[0065] The data transmission interface is fixed to the front panel 5 via a pressing ring.

[0066] In one embodiment, the main control module 3 is fixed to the front panel 5 and the detection and solution module 2 via a bracket and screws. Through the configuration of the main control module 3, the captured image can be transmitted to the OLED display screen 41. The image on the OLED display screen 41 is projected onto the entrance pupil of the human eye through the eyepiece assembly 42, so that the OLED display screen 41 is superimposed with electronic compass information, direction information, and battery level display, etc., facilitating the real-time display of information. This ensures that the image seen by the human eye is consistent with that of the display terminal, and also improves adaptability. At the same time, the compact design of the internal components makes the reconnaissance instrument compact and easy to carry.

[0067] In one embodiment of the present application, the front panel 5 , the intermediate housing 6 and the rear panel 7 are sealed by screws and conductive sealing rings.

[0068] In this embodiment, the front panel 5, the intermediate shell 6, and the rear panel 7 are sealed by screws and conductive sealing rings to form a sealed shell assembly, which can achieve good electromagnetic shielding effect, effectively prevent current leakage and static electricity accumulation, protect the safe use of the product, and improve the reliability of the product.

[0069] In one embodiment of the present application, the device further includes: a heat dissipation structure for dissipating heat from the detection and solution module.

[0070] In one embodiment of the present application, a thermally conductive silicone pad is provided on the heat dissipation structure to conduct the heat of the detection and resolution module to the housing group of the device for actively detecting short-wave infrared sights.

[0071] In this embodiment, due to the high power consumption of the target resolution unit and laser detector, a heat dissipation structure is provided to dissipate heat from the target resolution unit and the laser detector. Furthermore, a thermally conductive silicone pad is attached to the heat dissipation structure to quickly conduct heat to the housing assembly, preventing the detection and resolution module 2 from overheating and affecting the detection performance of the entire device.

[0072] In one embodiment of the present application, the main control module 3 is also used to receive user operation instructions, control the short-wave infrared observation module, detection and solution module, main control module, display module and positioning module according to the user operation instructions, complete corresponding operation functions, and receive data information and status information of the short-wave infrared observation module, detection and solution module, main control module, display module and positioning module to monitor the module operation status.

[0073] In this embodiment, the main control module 3 primarily processes video image data, overlays the display and control interface, and accepts user commands, controlling each module to perform its corresponding functions accordingly. It also receives data and status information from each module. The OLED display 41 displays processed images and system status information in real time. The main control module 3 also integrates human-computer interaction, monitors the operating status of each module, and schedules tasks for other modules.

[0074] The main interface of the device for actively detecting short-wave infrared sights in the embodiment of the present application is as follows Figure 3 As shown, Figure 3 101 represents the “photo / video” button icon, 102 represents the “menu” function button icon, 103 represents the “distance measurement” button icon, 104 represents the “detection” button icon, and 105 represents the mark of the detected short-wave infrared sight.

[0075] In one embodiment, Figure 6 This is a schematic diagram of the working principle of the device for actively detecting short-wave infrared sights. In the embodiment of this application, through experimental verification, a simulator is used to read the data value of the target object captured by the CCD in the system receiving component from the main processor memory. The data is made into a chart for easy observation using MATLAB. Figure 4 、 Figure 5 As shown in Figure 2, the image difference data comparison diagram is when detecting the short-wave infrared sight at 200m and 500m respectively. Figure 4 and Figure 5It can be seen that, affected by factors such as atmospheric background radiation, transmittance, scattering and absorption, and turbulence, after active and passive image differential processing, the signal-to-noise ratio is further improved, and the target signal of the detected sight is easier to extract ( Figure 4 、 Figure 5 The difference between active and passive differential imaging is not particularly noticeable at close range and against simple backgrounds. However, at long range and against complex backgrounds, the signal-to-noise ratio of the active and passive image difference data is significantly improved, making it easier to identify true targets and reducing false alarm rates. The image generated by using the "background difference" between the active and passive images negligible to the influence of ambient light intensity is then compared with a pre-set criterion to determine the pixel with the strongest signal. The spatial coordinates corresponding to this pixel are the position of the shortwave infrared scope.

[0076] In one embodiment, the operator removes the active shortwave infrared scope and battery from the product box, opens the battery compartment cover, inserts the battery into the battery compartment according to the correct positive and negative polarity markings, and tightens the battery compartment cover. The active shortwave infrared scope is handheld or mounted on a tripod, powered on, and after the power-on self-test is completed, the target area is observed and detected.

[0077] In one embodiment, the working principle diagram of the device for actively detecting short-wave infrared scopes is as follows: Figure 7 As shown, Use the short-wave infrared observation module to observe the surrounding area and determine whether there is an observable target object. If there is an observable target object, activate the Beidou positioning module to obtain the longitude and latitude coordinates, activate the electronic compass to obtain the direction information, and activate the laser rangefinder to measure the distance to the target object.

[0078] If no target object is observable, the detection and solution module is activated to actively scan and detect the target object. It is then determined whether the target object exists. If not, the short-wave infrared observation module is used to observe the surrounding area. If the target object exists, the Beidou positioning module is activated to obtain the longitude and latitude coordinates, the electronic compass is activated to obtain the azimuth information, and the laser rangefinder is activated to measure the distance to the target object.

[0079] After turning on the Beidou positioning module to obtain the longitude and latitude coordinates, turning on the electronic compass to obtain the azimuth information, and turning on the laser rangefinder to measure the distance to the target object, the actual coordinate information of the target object is obtained for information reporting and decision-making.

[0080] The device for actively detecting short-wave infrared sights in the embodiment of the present application has functions such as long-range observation, detection and positioning. The short-wave infrared observation module used therein can improve the imaging quality of the device during daytime with sufficient light, and can also perform observation through fog. Short-wave infrared is less affected by environmental factors, and most materials can be detected at night using atmospheric glow and night sky light, thereby expanding the application range of the device.

[0081] The device for actively detecting short-wave infrared sights in the embodiment of the present application can not only well detect and automatically mark the spatial position and distance of hostile short-wave infrared sights, but also correctly identify targets and effectively eliminate interfering targets in the field of view, ensuring the accuracy of imaging detection while also having the anti-interference ability of non-imaging detection. Through active and passive image differences, it can identify subtle characteristics of the target, thereby identifying and eliminating targets that are not observed by the sight. It can detect potential threat sources at long distances, over a large range, and with high probability under complex backgrounds, quickly discover and accurately locate them, ensure rapid discovery when targets appear, and no or few false alarms when there are no targets.

[0082] The laser detector of the detection and solution module in the embodiment of the present application uses the 1530nm to 1560nm band, which has great advantages in the fields of laser active reconnaissance and laser countermeasures. The laser detector in this band has the following advantages in photoelectric counter-reconnaissance: it is in the atmospheric transmission window and has a long transmission distance; the atmospheric scattering is weak and the detection performance is good in bad weather; it is invisible to traditional low-light night vision equipment and can conduct all-weather reconnaissance; there are mature detectors and a complete application system can be built; the laser in the 1.4μm to 1.6μm band is safe for human eyes to avoid accidental injury.

[0083] The active short-wave infrared scope detection device of the present application embodiment utilizes the Beidou positioning module in the positioning module to provide the operator with location and time information. In conjunction with an electronic compass and laser rangefinder, it integrates high-precision satellite positioning technology, laser ranging technology, and the angle measurement parameter measurement technology of a digital compass to accurately locate the target. Simultaneously, the device can also implement target guidance. Using the known target and its own Beidou positioning location information, it uses a homogeneous coordinate transformation method to perform coordinate transformation during the positioning and guidance process, combined with the compass's orientation function, to obtain the target's positioning and guidance data.

[0084] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0085] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A device for actively detecting short-wave infrared sights, characterized in that: include: Short-wave infrared observation module, detection and solution module, main control module and display module; Wherein, the short-wave infrared observation module is used to collect images of the environmental area; The detection and resolution module includes a target resolution unit and a laser detector, wherein the laser detector is used to emit a detection laser, capture the detection laser returned by the target object in the environmental area, and capture the position information of the returned detection laser, and enhance the returned detection laser through signal processing. The target resolution unit is used to determine the display screen coordinates corresponding to the target object based on the first image and the second image captured by the short-wave infrared observation module through image difference and threshold analysis, and send the display screen coordinates to the main control module, wherein the first image is the image captured by the short-wave infrared observation module when the laser detector emits the detection laser, and the second image is the image captured by the short-wave infrared observation module when the laser detector does not emit the detection laser; The main control module is used to mark the coordinates of the display screen and control the display module to display the environmental area, the target object and the marked frame, and the target object is a short-wave infrared scope.

2. The device for actively detecting short-wave infrared sights according to claim 1 is characterized in that: The target solving unit performs an image difference method, including: Performing Gaussian filtering to remove noise on an input image, where the input image includes the first image and the second image; The Roberts operator is used to calculate the gradient magnitude of the input image. Dividing the input image into a plurality of sub-blocks, calculating the grayscale mean and standard deviation of each sub-block, and calculating the adaptive threshold within the sub-block according to the grayscale mean and the standard deviation; Segmenting the input image by the gradient amplitude and the adaptive threshold to obtain a first cat's eye region; Performing morphological post-processing on the first cat's eye region in sequence to obtain a second cat's eye region; The contour of the second cat's eye area is extracted, and the ellipse equation is fitted using the least squares method, and the target cat's eye area is screened out according to the conditions of eccentricity and area.

3. The device for actively detecting short-wave infrared sights according to claim 2, characterized in that: The target solving unit performs a threshold analysis method, including: The obtained signal value corresponding to the target cat's eye area is compared with a preset threshold, and pixel points with signal values ​​greater than the preset threshold are screened out, thereby determining the display screen coordinates of the target object.

4. The device for actively detecting short-wave infrared sights according to claim 1, characterized in that: The short-wave infrared observation module includes a short-wave infrared core and a short-wave infrared objective lens. The frame rate of the short-wave infrared objective lens matches the emission frequency of the laser detector, and the main control module performs clock synchronization.

5. The device for actively detecting short-wave infrared scopes according to claim 1, characterized in that: Also includes: A housing assembly, the housing assembly comprising a front panel, an intermediate housing, and a rear panel, wherein a sealed cavity is formed within the housing assembly; The detection and solution module is arranged in the sealed cavity; the front panel is provided with a laser emitting window and a laser receiving window, the laser emitting window is used to emit detection laser, and the laser receiving window is used to receive the returned detection laser.

6. The device for actively detecting short-wave infrared sights according to claim 5, characterized in that: The front panel, the intermediate housing, and the rear panel are sealed by screws and a conductive sealing ring; The laser detector uses a wavelength range of 1530nm to 1560nm; A 1550nm narrowband filter is set at the front end of the laser receiving window. The half-peak width of the narrowband filter is 10±2nm and the transmittance is greater than 30%.

7. The device for actively detecting short-wave infrared scopes according to claim 1, characterized in that: Also includes: The heat dissipation structure is used to dissipate heat from the detection and solution module.

8. The device for actively detecting short-wave infrared sights according to claim 7 is characterized in that: A thermally conductive silicone pad is provided on the heat dissipation structure to conduct the heat of the detection and resolution module to the housing group of the device for actively detecting short-wave infrared sights.

9. The device for active detection of short-wave infrared scopes according to any one of claims 1 to 8, characterized in that: Also includes: A positioning module, the positioning module is used to determine the actual coordinate information of the target object; The positioning module includes a Beidou positioning module, an electronic compass and a laser rangefinder. The Beidou positioning module is used to locate the latitude and longitude coordinates of its own observation point, the electronic compass is used to display the azimuth information of the target object relative to its own observation point in real time, and the laser rangefinder is used to measure the distance of the target object relative to its own observation point.

10. The device for actively detecting short-wave infrared scopes according to claim 9 is characterized in that: The main control module is also used to receive user operation instructions, control the short-wave infrared observation module, the detection and solution module, the main control module, the display module and the positioning module according to the user operation instructions, complete corresponding operation functions, and receive data information and status information of the short-wave infrared observation module, the detection and solution module, the main control module, the display module and the positioning module to monitor the module operation status.

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