Shooting aiming method and system

Abstract

The invention relates to the field of shooting aiming, and provides a shooting aiming method and system in order to simplify the shooting aiming process of a user and improve the shooting precision. An environment information collecting unit is installed on a gun body, and environment information is automatically collected through the environment information collecting unit; the environment information and the position information of the shooting target are substituted into the ballistic trajectory equation to obtain the impact point deviation, the deviation is displayed on the display screen, a shooter only needs to adjust a muzzle according to the deviation to achieve shooting correction, the use threshold is lowered, and the shooting precision and speed are improved.

Description

Technical Field

[0001] The invention relates to the field of shooting and aiming, and in particular to a shooting and aiming method and system. Background Art

[0002] The trajectory of the bullet is affected by many factors such as temperature, air pressure, wind direction, wind speed, air humidity, shooting angle, projectile speed and gravity. There will be a large deviation between the impact point and the aiming point. The shooter needs to adjust the scope knob up and down or left and right according to external factors and target distance or use deviation aiming to achieve accurate shooting. However, the training of a shooter requires a lot of live-fire shooting to accumulate a lot of shooting experience, and then use experience to estimate the shooting deviation. This results in a systematic training process for training an excellent shooter, and the training cycle is long. When the target is far away, the shooter's ability to correct the trajectory and environmental parameters will drop sharply. Summary of the invention

[0003] In order to simplify the shooting aiming process of the user and improve the shooting accuracy, the present application provides a shooting aiming method and system.

[0004] The technical solution adopted by the present invention to solve the above problems is:

[0005] Shooting aiming methods, including

[0006] Step 1: Establish a shooting coordinate system, and obtain the coordinate value of the shooting target in the shooting coordinate system based on the laser range sensor and the horizontal angle sensor;

[0007] Step 2: Collect environmental information, including atmospheric pressure, temperature, humidity, wind speed and direction;

[0008] Step 3, obtaining the gun body angle based on the coordinate value of the shooting target and the ballistic trajectory equation, including the longitudinal angle and the lateral angle;

[0009] Step 4: Calculate the aiming position of the shooting target on the display screen according to the angle of the gun body;

[0010] Step 5: Aim and shoot according to the aiming position.

[0011] Furthermore, the ballistic trajectory equation in step 3 is expressed as:

[0012]

[0013] Where ρ is the air density, S is the windward area of ​​the bullet during flight, and C D is the drag coefficient, m is the mass of the bullet, g is the acceleration due to gravity, v x 、v y 、v z are the flying speed of the bullet on the X-axis, Y-axis, and Z-axis respectively, vwx 、v wy 、v wz are the wind speeds on the X, Y, and Z axes respectively.

[0014] Furthermore, the air density is calculated as: Where P is the atmospheric pressure, R q is the air constant, α is the absolute humidity, and T is the temperature.

[0015] Furthermore, the drag coefficient is obtained according to the sound speed segment.

[0016] Furthermore, step 1 is specifically as follows:

[0017] Fix the sight and laser rangefinder on the gun and keep their optical axes parallel to the gun barrel. Take the exit of the gun barrel as the coordinate origin. Use the sight to aim directly at the target P. The projection direction of the ray aimed at the target P on the horizontal plane is the X-axis, the opposite direction of gravity is the Y-axis, and the coordinate axis perpendicular to the X-axis and Y-axis is the Z-axis.

[0018] Assume that the distance from the center point of the laser ranging sensor to the target point P is L, the lateral distance between the center point of the laser ranging sensor and the muzzle is S, the longitudinal distance is D, and the angle between the axis of the barrel and the horizontal plane is θ. The coordinates of the shooting target P are P((LS)cosθ, (LS)sinθ+D / cosθ, 0).

[0019] The shooting aiming system includes a data acquisition unit, a data processing unit and a display unit connected in sequence.

[0020] The data acquisition unit includes a temperature and humidity sensor, an atmospheric pressure sensor, a wind speed and direction sensor, a laser ranging sensor, and a horizontal angle sensor;

[0021] The data processing unit is used to calculate the position information of the shooting target according to the information collected by the laser rangefinder sensor and the horizontal angle sensor; obtain the gun body angle according to the position information of the shooting target and the ballistic trajectory equation; calculate the aiming position of the shooting target on the display screen according to the gun body angle;

[0022] A display unit is used to display the aiming position.

[0023] Further, the aiming position is marked with a crosshair, and the display unit displays the crosshairs directly aiming at the target and the actual aiming crosshairs aimed at the target during shooting.

[0024] Compared with the prior art, the present invention has the following beneficial effects: an environmental information acquisition unit is installed on the gun body, environmental information is automatically acquired through the environmental information acquisition unit, the environmental information and the position information of the shooting target are brought into the ballistic trajectory equation to obtain the impact point deviation, and the deviation is displayed on a display screen. The shooter only needs to adjust the muzzle according to the deviation to achieve shooting correction, which lowers the usage threshold and improves shooting accuracy and speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Flow chart of shooting aiming method;

[0026] Figure 2 Schematic diagram of the coordinate system establishment method;

[0027] Figure 3 This is a schematic diagram of the impact point deviation;

[0028] Figure 4 is a schematic diagram of bias correction;

[0029] Figure 5 is the relationship between the drag coefficient and the speed;

[0030] Figure 6 It is a schematic diagram of the display mode of the display unit. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] like Figure 1 As shown, the shooting aiming method comprises:

[0033] Step 1: Establish a shooting coordinate system, and obtain the coordinate value of the shooting target in the shooting coordinate system based on the laser rangefinder sensor and the horizontal angle sensor.

[0034] Fix the sight and laser rangefinder on the gun and keep their optical axes strictly parallel to the barrel. In this way, a coordinate system is established with the barrel outlet as the coordinate origin. At the initial position, the shooter uses the sight to aim directly at the target P (x, y, 0). The projection direction of the ray aimed at the target P on the horizontal plane is the X-axis, the opposite direction of gravity is the Y-axis, and the coordinate axis perpendicular to the X and Y axes is the Z-axis. Figure 2 As shown. The center axis of the sight eyepiece is parallel to the axis of the gun barrel. The distance from the center point of the rangefinder to the target point P is L. The horizontal distance between the center point of the rangefinder and the muzzle is S, and the vertical distance is D. The angle θ between the axis of the gun barrel and the horizontal plane is obtained by the horizontal angle sensor. The target coordinate position is calculated as follows:

[0035] P((LS)cosθ, (LS)sinθ+D / cosθ, 0).

[0036] In order to hit the target accurately, it is necessary to ensure that the target point P is on the bullet's ballistic curve, so it is necessary to raise the angle of the gun body, such as Figure 3 At this time, the angle between the initial velocity of the bullet and the horizontal plane is γ, that is, the longitudinal angle; if there is a crosswind, the bullet will deviate along the Z axis, and the angle between the Z plane and the Y axis is β, that is, the transverse angle.

[0037] This angle is not easy to grasp, and needs to be designed in a more intuitive form. An image acquisition sensor is installed on the gun body (such as the rear end of the scope) as an eyepiece, so that the image in the scope will be displayed on the LCD screen. Figure 4 As shown. L1 is the horizontal line, L2 is the ray of the sight aiming at the target point P. In the initial aiming, it passes through the center point O of the screen image. After calculation, the longitudinal angle γ-θ of the gun body needs to be raised. L4 is the ray emitted from the muzzle at this time, and its intersection with the screen is point A. If there is wind interference, the gun body needs to move horizontally by an angle β. L3 is the ray emitted from the muzzle at this time, and its intersection with the screen is point B. In this way, OA and OB are the distances of the gun body offset in the longitudinal and lateral directions respectively. Draw a rectangle on the screen with OA and OB as the sides to get point C. When shooting, move the aiming center to point C to hit the target.

[0038] Step 2: Collect environmental information, including atmospheric pressure, temperature, humidity, wind speed and direction.

[0039] Step 3: Obtain the gun body angle based on the coordinate value of the shooting target and the ballistic trajectory equation, including the longitudinal angle and the lateral angle; the ballistic trajectory equation is as follows:

[0040]

[0041] Where ρ is the air density, S is the windward area of ​​the bullet during flight, and C D is the drag coefficient, m is the mass of the bullet, g is the acceleration due to gravity, v x 、v y 、v z are the flying speed of the bullet on the X-axis, Y-axis, and Z-axis respectively, v wx 、v wy 、v wz are the wind speeds on the X, Y, and Z axes respectively.

[0042]

[0043] Where P is the atmospheric pressure, R q is the air constant, α is the absolute humidity, and T is the thermodynamic temperature.

[0044] Drag coefficient C D It is a function related to the velocity v of the projectile and the speed of sound c. The relationship between the drag coefficient and the speed is as follows Figure 5 The change of drag coefficient can be divided into four stages. The first stage is the subsonic stage, Ma<0.8, and the drag coefficient C D Considered as a fixed constant; Stage II is the transonic stage, 0.8<Ma<1.2, C D Rapidly rises to the maximum value; Stage III is the supersonic stage, 2.8>Ma>1.2, C D The speed gradually decreases to a stable level; the fourth stage is the hypersonic stage, Ma>2.8, C D The flight speed of the bullet within the effective range of the sniper rifle is 420-840 m / s, which is basically in the third stage, so the relationship between the drag coefficient and speed in the third stage is adopted.

[0045] Can Figure 5 The drag coefficient curve shown is subdivided into more segments, each segment corresponds to an average value, and these values ​​are stored in different memory units. When calculating the trajectory, the drag coefficient values ​​of different segments are used according to the current bullet speed.

[0046] Determine the initial longitudinal angle γ and transverse angle β according to the horizontal coordinate of the shooting target, and calculate the vertical coordinate y1 when the bullet flies to the horizontal distance x. If y1≠y, adjust γ and β until y1=y. At this time, γ and β are the final longitudinal angle and transverse angle.

[0047] Step 4: Calculate the aiming position of the shooting target on the display screen according to the longitudinal angle and the transverse angle.

[0048] Step 5: Aim and shoot according to the aiming position.

[0049] To facilitate aiming adjustments, Figure 6 As shown, the aiming position of this embodiment is marked with a crosshair, and the display unit displays the crosshair o directly aiming at the target and the actual aiming crosshair o' (i.e. the aiming position determined in step 4) aiming at the target during shooting. The target can be shot by moving o' to coincide with o.

[0050] The present application also provides a shooting aiming system, comprising a data acquisition unit, a data processing unit and a display unit connected in sequence,

[0051] The data acquisition unit includes a temperature and humidity sensor, an atmospheric pressure sensor, a wind speed and direction sensor, a laser ranging sensor, and a horizontal angle sensor;

[0052] The data processing unit is used to calculate the position information of the shooting target according to the information collected by the laser rangefinder sensor and the horizontal angle sensor; obtain the gun body angle according to the position information of the shooting target and the ballistic trajectory equation; calculate the aiming position of the shooting target on the display screen according to the gun body angle;

[0053] The display unit is used to display the aiming position; the aiming position is marked with a crosshair, and the displayed aiming position includes the crosshair directly aiming at the target and the actual aiming crosshair aimed at the target when shooting.

Claims

1. A shooting aiming method, characterized in that: include Step 1: Establish a shooting coordinate system, and obtain the coordinate value of the shooting target in the shooting coordinate system based on the laser range sensor and the horizontal angle sensor; Step 2: Collect environmental information, including atmospheric pressure, temperature, humidity, wind speed and direction; Step 3, obtaining the gun body angle based on the coordinate value of the shooting target and the ballistic trajectory equation, including the longitudinal angle and the lateral angle; Step 4: Calculate the aiming position of the shooting target on the display screen according to the angle of the gun body; Step 5: Aim and shoot according to the aiming position.

2. The shooting aiming method according to claim 1, characterized in that: The ballistic trajectory equation in step 3 is expressed as: Where ρ is the air density, S is the windward area of ​​the bullet during flight, and C D is the drag coefficient, m is the mass of the bullet, g is the acceleration due to gravity, v x 、v y 、v z are the flying speed of the bullet on the X-axis, Y-axis, and Z-axis respectively, v wx 、v wy 、v wz are the wind speeds on the X, Y, and Z axes respectively.

3. The shooting aiming method according to claim 2, characterized in that: The air density is calculated as: Where P is the atmospheric pressure, R q is the air constant, α is the absolute humidity, and T is the temperature.

4. The shooting aiming method according to claim 2, characterized in that: The drag coefficient is obtained according to the speed of sound segment.

5. The shooting aiming method according to any one of claims 1 to 4, characterized in that: Step 1 is as follows: Fix the sight and laser rangefinder on the gun and keep their optical axes parallel to the gun barrel. Take the exit of the gun barrel as the coordinate origin. Use the sight to aim directly at the target P. The projection direction of the ray aimed at the target P on the horizontal plane is the X-axis, the opposite direction of gravity is the Y-axis, and the coordinate axis perpendicular to the X-axis and Y-axis is the Z-axis. Assume that the distance from the center point of the laser ranging sensor to the target point P is L, the lateral distance between the center point of the laser ranging sensor and the muzzle is S, the longitudinal distance is D, and the angle between the axis of the barrel and the horizontal plane is θ. The coordinates of the shooting target P are P((LS)cosθ, (LS)sinθ+D / cosθ, 0).

6. A shooting aiming system, characterized in that: It includes a data acquisition unit, a data processing unit and a display unit connected in sequence. The data acquisition unit includes a temperature and humidity sensor, an atmospheric pressure sensor, a wind speed and direction sensor, a laser ranging sensor, and a horizontal angle sensor; The data processing unit is used to calculate the position information of the shooting target according to the information collected by the laser rangefinder sensor and the horizontal angle sensor; obtain the gun body angle according to the position information of the shooting target and the ballistic trajectory equation; calculate the aiming position of the shooting target on the display screen according to the gun body angle; A display unit is used to display the aiming position.

7. The shooting aiming system according to claim 6, characterized in that: The aiming position is marked with a crosshair, and the display unit shows the crosshairs aimed directly at the target and the actual aiming crosshairs aimed at the target when shooting.

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