A rapid gun calibration system based on photoelectric intelligent sighting device

Abstract

The application discloses a quick gun calibration system based on an optoelectronic intelligent sighting device, which comprises a gun calibration mirror installed on a gun barrel and a gun calibration correction method based on the optoelectronic intelligent sighting device; the gun calibration mirror comprises an inserting shaft, a lens barrel, an optoelectronic unit, a support and a power supply unit, the lens barrel is installed on the upper part of the support, the optoelectronic unit is installed in the lens barrel; the lower part of the support is provided with a battery compartment, the power supply unit is installed in the battery compartment, and the inserting shaft is installed on one side of the support. The method does not need to consume ammunition and does not need to configure a special site, has good convenience and can calibrate the gun at any time and anywhere.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical instruments, and particularly relates to a rapid gun calibration system used in cooperation with an optoelectronic intelligent sighting device and a firearm. TECHNICAL BACKGROUND

[0002] With the development of modern warfare, the position of the optoelectronic sighting device is becoming more and more important, and the optoelectronic sighting device has many advantages over the traditional white light sighting device. The aiming accuracy of the optoelectronic sighting device is of great significance to achieve long-distance and high-precision strikes, and the aiming accuracy of the optoelectronic sighting device is related to a good gun calibration method.

[0003] Before use, the firearm needs to be calibrated to make the line of sight of the sighting scope consistent with the line of fire, and the traditional sighting scope generally uses live ammunition to calibrate the firearm, which not only consumes ammunition but also requires a suitable site. In actual use, some external forces that occur during the carrying process of the weapon equipment can also cause the posture of the sighting scope to change, thereby affecting the hit rate of the firearm, and therefore a rapid, intelligent and accurate firearm calibration method is needed. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a rapid, intelligent and standard gun calibration system based on an optoelectronic intelligent sighting device.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0006] A rapid gun calibration system based on an optoelectronic intelligent sighting device, comprising a gun calibration scope mounted on a barrel, and a gun calibration correction method based on an optoelectronic intelligent sighting device.

[0007] The gun calibration scope comprises a shaft, a lens barrel, an optoelectronic unit, a bracket and a power supply unit, the upper part of the bracket is provided with the lens barrel, the lens barrel is provided with the optoelectronic unit, the lower part of the bracket is provided with a battery compartment, the battery compartment is provided with the power supply unit, and the shaft is mounted on one side of the bracket.

[0008] The specific operation steps of the gun calibration correction method based on the optoelectronic intelligent sighting device are as follows:

[0009] I. Insert the shaft of the gun calibration scope into the barrel of the firearm, use the CCD to collect the image of the crosshair in the optoelectronic intelligent sighting device, and use the Canny operator edge detection to extract the edge of the collected crosshair image to obtain a single-pixel contour without discontinuous points, then extract the coordinate gray value of the contour to obtain the center position of the crosshair image.

[0010] II. Remove the background noise from the center position region of the crosshair image obtained in step I by circle fitting.

[0011] Third, apply a statistical probability Hough transform to the crosshair image obtained in step two to fit a straight line. After fitting the line, obtain a line set. The intersection point of the two lines can be obtained at the gray-level steps on the left and right sides of the ground truth position of the crosshair image.

[0012]

[0013] In the formula, k1, k2, b1, and b2 are the slope and intercept of the two lines, respectively. The center point of the coordinates is obtained by directly calculating the mean of the point set.

[0014] Fourth, use the coordinate center point obtained in step three as the adjustment reference point for the aiming line of the photoelectric intelligent sight, thereby obtaining the correction value of the photoelectric intelligent sight, and use this correction value to correct the photoelectric intelligent sight.

[0015] Furthermore, the method for removing background noise described in step two involves obtaining the diameter and center coordinates of the fitted circle through Hough circle detection, traversing all pixels, and suppressing the gray values ​​of pixels whose coordinate distance is greater than the radius.

[0016] Furthermore, the method for obtaining the correction value of the photoelectric intelligent sight in step four is as follows:

[0017] When the horizontal deviation between the crosshair image and the center of the field of view is Δx, according to the principle of photoelectric imaging, the following formula applies:

[0018]

[0019]

[0020] In the formula, w is the target surface width of the CCD, h is the target surface height of the CCD, a is the field of view of the objective lens of the optoelectronic intelligent sight, f is the effective focal length of the optoelectronic intelligent sight, θ is the horizontal angle between the optical axis of the optoelectronic intelligent sight and the optical axis of the aiming scope, and n θ δ represents the pixel difference between the target point in the horizontal direction and the center point of the field of view, where δ is the pixel size.

[0021] The angle θ between the two optical axes in the horizontal direction can be obtained from the above formula. x Similarly, the angle θ between the two optical axes in the vertical direction can be obtained. y ;

[0022]

[0023] In an optoelectronic intelligent sight, after obtaining the pixel differences Δx and Δy between the center of the crosshair and the center of the optoelectronic intelligent sight's field of view through image processing, the azimuth and elevation angle deviation θ can be calculated. x θ y These two parallax values ​​are used in fire control corrections.

[0024] Further, the photoelectric unit comprises a lens, a crosshair plate, frosted glass and a light source, the lens is installed at the front end of the lens barrel, the crosshair plate is installed at the focal length of the lens barrel, the frosted glass is installed at the rear of the crosshair plate, and the light source is installed at the rear of the frosted glass through a lamp holder.

[0025] Further, a compression ring one is installed between the lens and the lens barrel, a compression ring two is installed between the lens and the crosshair plate, and a compression ring three is installed between the frosted glass and the light source.

[0026] Further, the power supply unit comprises a battery module, the battery module is located inside the battery compartment and is sealed in the battery compartment through a compression ring four, a plug and a rear cover.

[0027] Further, a switch for controlling the light source is installed at the rear end of the lens barrel.

[0028] Further, the middle part of the plug shaft is provided with an elastic sheet, the end part of the plug shaft is provided with a sealing groove, and an O-ring is installed in the sealing groove for sealing the battery compartment.

[0029] Compared with the prior art, the advantages of the present application are that:

[0030] 1. The gun calibration mirror is used in cooperation with a gun calibration correction method based on an optoelectronic intelligent sighting device, the correction value of the gun calibration can be quickly obtained in the intelligent sighting device, and the optoelectronic intelligent sighting device is corrected by using the correction value, so that the method has the characteristics of rapidity, intelligence and accuracy and has certain application value.

[0031] 2. Compared with the traditional live ammunition shooting gun calibration method, the present application does not need to consume ammunition and does not need to configure a special site, has good convenience, and can calibrate the gun at any time and anywhere. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of the gun calibration mirror of the present application;

[0033] Figure 2 is a sectional view of the gun calibration mirror of the present application;

[0034] Figure 3 is an installation schematic view when the gun calibration mirror of the present application is applied in cooperation with an optoelectronic intelligent sighting device;

[0035] Figure 4 is a schematic view of extracting the gray value of the crosshair wire profile coordinates;

[0036] Figure 5 is a recognition effect diagram without background noise removal;

[0037] Figure 6 is a final recognition effect and correction amount schematic view;

[0038] In the diagram: 1. Shrapnel; 2. Insert shaft; 3. Scope barrel; 4. Switch; 5. Bracket; 6. Pressure ring one; 7. Lens; 8. Pressure ring two; 9. Crosshair reticle; 10. Frosted glass; 11. Pressure ring three; 12. Light source; 13. Lamp holder; 14. Battery assembly; 15. Pressure ring four; 16. Plug; 17. Optical intelligent sight; 18. Firearm; 19. Battery compartment; 20. Sealing groove; 21. Gun aiming scope. Detailed Implementation

[0039] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1-6 As shown, this embodiment of a rapid gun-calibrating system based on an optoelectronic intelligent sight includes a gun-calibrating scope 21 mounted on the barrel of a firearm 18, and a gun-calibrating correction method based on an optoelectronic intelligent sight 17 on the firearm 18.

[0041] like Figures 1-3 As shown, the aiming scope 21 includes a mounting shaft 2, a scope barrel 3, an optoelectronic unit, a bracket 5, and a power supply unit. The scope barrel 3 is mounted on the upper part of the bracket 5, and the optoelectronic unit is installed inside the scope barrel 3. The optoelectronic unit includes a lens 7, a reticle 9, a ground glass 10, and a light source 12. The lens 7 is mounted at the front end of the scope barrel 3, and a pressure ring 6 is installed between the lens 7 and the scope barrel 3. The reticle 9 is mounted at the focal length of the scope barrel 3, and a pressure ring 8 is installed between the lens 7 and the reticle 9. The ground glass 10 is mounted at the rear of the reticle 9, and the light source... The light source 12 is mounted on the rear of the frosted glass 10 through the lamp holder 13 at a suitable distance. A pressure ring 3 11 is installed between the frosted glass 10 and the light source 12. A switch 4 is installed at the rear end of the lens barrel 3, and the switch 4 controls the internal light source 12. The diameter of the crosshair 9 is 16mm, the thickness of the frosted glass 10 is 6mm, and the power of the light source 12 is 0.5W. The thickness of the frosted glass 10 needs to be matched with the intensity of the light source 12 to adjust the light intensity so that the smart sight 17 can recognize the crosshair image under any background.

[0042] The lower part of the bracket 5 is provided with a battery compartment 19, and a power supply unit is installed in the battery compartment 19. The power supply unit includes a battery module 14, which is powered by a single 18650 battery. The battery module 14 is located inside the battery compartment 19 and is sealed by a pressure ring 15, a plug 16 and a rear cover. The bracket is used for wiring to facilitate sealing and the structure is simpler.

[0043] The insertion shaft 2 is installed on one side of the bracket 5. A spring piece 1 is provided in the middle of the insertion shaft 2, and a sealing groove 20 is provided at the end of the insertion shaft 2. An O-ring is installed in the sealing groove 20 to seal the battery compartment 19.

[0044] The set spring sheet 1 facilitates the insertion of the insertion shaft 2 into the barrel of the firearm 18. According to the optical principle, when the insertion shaft 2 of the boresight 21 rotates in the barrel, the parallel light emitted by the boresight 21 is parallel to the insertion shaft 2, at this time, the accuracy of the gun is higher, the angle of the incident light in the lens of the photoelectric intelligent sight 17 does not change, and therefore the position of the crosshair image in the photoelectric intelligent sight 17 does not change. When the photoelectric intelligent sight 17 and the boresight 21 have an angle in the axial direction, which leads to a change in the incident angle, the position of the crosshair image in the photoelectric intelligent sight 17 will be offset, and according to the offset distance, the angle that needs to be corrected for the photoelectric intelligent sight 17 can be calculated, thereby completing the calibration of the sight.

[0045] The specific operation steps for calculating the angle value that needs to be corrected for the photoelectric intelligent sight 17 are as follows:

[0046] I. The CCD is used to collect the crosshair image of the boresight 21 inside the photoelectric intelligent sight 17, and the collected crosshair image is subjected to edge extraction through Canny operator edge detection to obtain a single-pixel contour without discontinuities. Then the coordinates and gray values of the contour are extracted to obtain the center position of the crosshair image as shown in Figure 4

[0047] II. The center position region of the crosshair image obtained in step I is shown in Figure 5 To prevent the straight line noise in the environmental information from affecting the subsequent straight line fitting to obtain the center of the crosshair image, the background noise is removed through circle fitting. The method for removing the background noise is to obtain the fitting circle diameter and the circle center coordinates through Hough circle detection, and to suppress the gray values of the pixel points with a coordinate distance greater than the radius.

[0048] III. The crosshair image with the background noise removed in step II is subjected to straight line fitting in the statistical probability Hough transform manner. The line set is obtained after the straight line fitting. The line set results are at the left and right edges of the gray scale step of the true value position of the crosshair image, and the intersection of the two straight lines is obtained.

[0049]

[0050] In the formula, k1, k2, b1, and b2 are the slopes and intercepts of the two straight lines, respectively. The coordinate center point is obtained by directly averaging the point set;

[0051] IV. The coordinate center point obtained in step III is taken as the adjustment reference point of the sighting line of the photoelectric intelligent sight 17, and the correction value of the photoelectric intelligent sight 17 is obtained. The photoelectric intelligent sight 17 is corrected by using the correction value, as shown in Figure 6

[0052] The correction value of the photoelectric intelligent sight 17 is obtained as follows: ​​

[0053] When the horizontal deviation between the crosshair image and the center of the field of view is Δx, according to the principle of photoelectric imaging, the following formula applies:

[0054]

[0055]

[0056] In the formula, w is the target surface width of the CCD, h is the target surface height of the CCD, a is the field of view of the objective lens of the optoelectronic intelligent sight, f is the effective focal length of the optoelectronic intelligent sight, θ is the horizontal angle between the optical axis of the optoelectronic intelligent sight and the optical axis of the aiming scope, and n θ δ represents the pixel difference between the target point in the horizontal direction and the center point of the field of view, where δ is the pixel size.

[0057] The angle θ between the two optical axes in the horizontal direction can be obtained from the above formula. x Similarly, the angle θ between the two optical axes in the vertical direction can be obtained. y ;

[0058]

[0059] In an optoelectronic intelligent sight, after obtaining the pixel differences Δx and Δy between the center of the crosshair and the center of the optoelectronic intelligent sight's field of view through image processing, the azimuth and elevation angle deviation θ can be calculated. x θ y These two parallax values ​​are used in fire control corrections.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the concept and scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the design concept of the present invention should fall within the protection scope of the present invention.

Claims

1. A rapid gun aiming system based on an optoelectronic intelligent sight, characterized in that, Including a gun-calibrating scope (21) mounted on the barrel, and a gun-calibrating correction method based on an optoelectronic smart sight (17); The aiming scope (21) includes a shank (2), a scope barrel (3), an optoelectronic unit, a bracket (5), and a power supply unit. The scope barrel (3) is installed on the upper part of the bracket (5), and the optoelectronic unit is installed inside the scope barrel (3). A battery compartment (19) is provided on the lower part of the bracket (5), and the power supply unit is installed inside the battery compartment (19). The shank (2) is installed on one side of the bracket (5). The specific operation steps of the gun correction method based on photoelectric intelligent sights are as follows:

1. Insert the insertion shaft (2) of the aiming scope (21) into the barrel of the firearm (18), use CCD to collect the crosshair image of the aiming scope (21) inside the optoelectronic intelligent sight (17), and use Canny operator edge detection to extract the edges of the collected crosshair image to obtain a single-pixel contour without discontinuities. Then extract the coordinate gray value of the contour to obtain the center position of the crosshair image.

2. Remove background noise from the central region of the crosshair image obtained in step 1 by circle fitting. Third, apply a statistical probability Hough transform to the crosshair image obtained in step two to fit a straight line. After fitting the line, obtain a line set. The intersection point of the two lines can be obtained at the gray-level steps on the left and right sides of the ground truth position of the crosshair image. In the formula, k1, k2, b1, and b2 are the slope and intercept of the two lines, respectively. The center point of the coordinates is obtained by directly calculating the mean of the point set. Fourth, the coordinate center point obtained in step three is used as the adjustment reference point of the aiming line of the photoelectric intelligent sight (17), thereby obtaining the correction value of the photoelectric intelligent sight (17), and the photoelectric intelligent sight (17) is corrected using the correction value.

2. The rapid gun aiming system based on an optoelectronic intelligent sight as described in claim 1, characterized in that, The method for removing background noise in step two involves obtaining the diameter and center coordinates of the fitted circle through Hough circle detection, traversing all pixels, and suppressing the gray values ​​of pixels whose coordinate distance is greater than the radius.

3. The rapid gun-calibrating system based on an optoelectronic intelligent sight as described in claim 2, characterized in that, The method for obtaining the correction value of the photoelectric intelligent sight (17) in step four is as follows: When the horizontal deviation between the crosshair image and the center of the field of view is Δx, according to the principle of photoelectric imaging, the following formula applies: In the formula, w is the target surface width of the CCD, h is the target surface height of the CCD, a is the field of view of the objective lens of the optoelectronic intelligent sight, f is the effective focal length of the optoelectronic intelligent sight, θ is the horizontal angle between the optical axis of the optoelectronic intelligent sight and the optical axis of the aiming scope, and n θ δ represents the pixel difference between the target point in the horizontal direction and the center point of the field of view, where δ is the pixel size. The angle θ between the two optical axes in the horizontal direction can be obtained from the above formula. x Similarly, the angle θ between the two optical axes in the vertical direction can be obtained. y ; In an optoelectronic intelligent sight, after obtaining the pixel differences Δx and Δy between the center of the crosshair and the center of the optoelectronic intelligent sight's field of view through image processing, the azimuth and elevation angle deviation θ can be calculated. x θ y These two parallax values ​​are used in fire control corrections.

4. The rapid gun-calibrating system based on an optoelectronic intelligent sight as described in claim 1 or 3, characterized in that, The photoelectric unit includes a lens (7), a cross reticle (9), a ground glass (10), and a light source (12). The lens (7) is installed at the front end of the lens barrel (3), the cross reticle (9) is installed at the focal length of the lens barrel (3), the ground glass (10) is installed at the rear of the cross reticle (9), and the light source (12) is installed at the rear of the ground glass (10) through a lamp holder (13).

5. The rapid gun-calibrating system based on an optoelectronic intelligent sight as described in claim 4, characterized in that, A pressure ring 1 (6) is installed between the lens (7) and the lens barrel (3), a pressure ring 2 (8) is installed between the lens (7) and the cross reticle (9), and a pressure ring 3 (11) is installed between the frosted glass (10) and the light source (12).

6. The rapid gun-setting system based on an optoelectronic intelligent sight as described in claim 4, characterized in that, The power supply unit includes a battery module (14), which is located inside the battery compartment (19) and is sealed inside the battery compartment (19) by a pressure ring (15), a plug (16) and a rear cover.

7. The rapid gun-setting system based on an optoelectronic intelligent sight as described in claim 1, characterized in that, A switch (4) for controlling the light source (12) is installed at the rear end of the lens tube (3).

8. The rapid gun-calibrating system based on an optoelectronic intelligent sight as described in claim 1, characterized in that, A spring piece (1) is provided in the middle of the insert shaft (2), and a sealing groove (20) is provided at the end of the insert shaft (2). An O-ring is installed in the sealing groove (20) to seal the battery compartment (19).

Images