Mild driving air cannon

Abstract

The embodiment of the invention provides a mild human-driving air cannon, which comprises an air storage tank, an air blower and a controller, the gun barrel is used for guiding airflow to impact the target person so as to mildly expel the target person; the quick release valve is used for connecting the gas storage tank and the gun barrel and has an opening state and a closing state; the control unit is used for triggering the quick release valve to be converted from the closed state to the open state according to the control instruction, so that the compressed air in the air storage tank forms airflow and enters the gun barrel; wherein the first outer surface of the air storage tank is adjacent to the second outer surface of the gun barrel, the first outer surface has a preset first radian, the second outer surface has a preset second radian, and a groove is formed between the first outer surface and the second outer surface and serves as a position for placing the shoulder when a user carries the air cannon on the shoulder; and a grip is arranged on the gun barrel and is used as a position for placing a hand when a user carries the air cannon on the shoulder.

Description

Technical Field

[0001] One or more embodiments of this specification relate to the field of safety control, and in particular to a gentle repellent air cannon. Background Art

[0002] In riot control scenarios, SWAT can employ a variety of non-lethal weapons to disperse individuals or groups. Common non-lethal weapons include water cannons, tear gas, rubber bullets, and batons. While each weapon has its own unique characteristics, they are generally quite lethal and can easily create a confrontational relationship with the target. In some scenarios where gentle removal of a target is necessary, other gentle means are limited beyond verbal dispersal and the use of lights, sirens, and other means. Summary of the Invention

[0003] One or more embodiments of this specification describe a gentle repelling air cannon that can gently repel a target person. During use, the air cannon has a low intensity on the target person and does not cause harm to the target person. It is highly safe and does not easily form an adversarial relationship with the repelled person, thereby facilitating the maintenance of a harmonious relationship between the two parties.

[0004] The present invention provides a gentle air cannon for repelling people, comprising:

[0005] Air receiver tanks, used to store compressed air;

[0006] a gun barrel, for directing airflow to impact a target person, so as to gently drive the target person away;

[0007] A quick-release valve, used to connect the gas tank and the gun barrel, having two states: open and closed;

[0008] A control unit, configured to trigger the quick-release valve to switch from a closed state to an open state according to a control instruction, so that the compressed air in the air storage tank forms an airflow and enters the gun barrel;

[0009] The first outer surface of the air tank is adjacent to the second outer surface of the gun barrel, the first outer surface has a preset first curvature, the second outer surface has a preset second curvature, and a groove is formed between the first outer surface and the second outer surface, which serves as a position for the shoulder of a user to place when carrying the air cannon on his shoulder.

[0010] The gun barrel is provided with a grip, which serves as a position for the user to place his hands when carrying the air cannon on his shoulder.

[0011] In a possible implementation, the control unit is a control trigger, and the control instruction is manually issued by the user. When the user carries the air cannon on his shoulder, the control trigger is located on the upper part of the gun barrel.

[0012] In a possible embodiment, the gun barrel is in the shape of a circular tube with one end open and the other end closed, and at least one opening is provided on the gun barrel between the two ends and closer to the open end.

[0013] In a possible implementation, the air storage tank is made of steel, and the gun barrel is made of aluminum alloy, so that the overall center of mass of the air cannon is controlled near the quick-release valve.

[0014] In a possible implementation, the method further includes:

[0015] a flexible projectile for loading into the gun barrel;

[0016] The gun barrel is used to guide the airflow to impact the flexible projectile, and the flexible projectile impacts the target person to gently drive the target person away.

[0017] Furthermore, the outer layer material of the flexible projectile is a microporous foam elastic layer, without an inner core or the inner core is a solid rubber ball.

[0018] Furthermore, the interior of the flexible projectile is filled with liquid dye, so that when the flexible projectile impacts the target person, the liquid dye splashes out through the microporous foaming elastic layer.

[0019] In a possible implementation, the method further includes:

[0020] The aiming assist device is used to determine whether the current elevation angle of the air cannon is suitable and to send an indication signal indicating whether the elevation angle is suitable.

[0021] Furthermore, the aiming assist device includes:

[0022] a laser rangefinder to determine the target distance between the air cannon and the target person;

[0023] Pitch angle sensor, used to determine the current first air cannon elevation angle;

[0024] a ballistic computer for determining an appropriate second air cannon elevation angle adapted to the target distance, comparing the magnitude relationship between the first air cannon elevation angle and the second air cannon elevation angle to obtain a comparison result, and controlling the activation of the signal light assembly according to the comparison result;

[0025] The signal light assembly is used to send out an indication signal for indicating whether the elevation angle is appropriate.

[0026] Furthermore, the signal light assembly includes:

[0027] A first signal light is used to indicate that the elevation angle of the first air cannon is higher than the elevation angle of the second air cannon, and the difference angle is greater than a first preset angle;

[0028] A second signal light is used to indicate that the elevation angle of the first air cannon is higher than the elevation angle of the second air cannon, and the difference angle is between the second preset angle and the first preset angle, and the second preset angle is smaller than the first preset angle;

[0029] A third signal light is used to indicate that the first air cannon elevation angle is consistent with the second air cannon elevation angle, and the difference angle is less than the second preset angle;

[0030] A fourth signal light is used to indicate that the elevation angle of the first air cannon is lower than the elevation angle of the second air cannon, and the difference angle is between the second preset angle and the first preset angle;

[0031] The fifth signal light is used to indicate that the elevation angle of the first air cannon is lower than the elevation angle of the second air cannon, and the difference angle is greater than the first preset angle.

[0032] The gentle air cannon for repelling people provided in the embodiments of this specification undergoes structural transformation on industrial equipment commonly used in the field of clearing blockages and breaking arches of materials, and applies the bulky industrial equipment across fields to individual portable equipment in the field of security and control. In addition to the basic structures such as the gas tank, the barrel, the quick-release valve, and the control unit, the first outer surface of the gas tank and the second outer surface of the barrel are specially designed to be adjacent, the first outer surface has a preset first curvature, the second outer surface has a preset second curvature, and a groove is formed between the first outer surface and the second outer surface, which serves as the position for the shoulder of the user when carrying the air cannon on the shoulder, and a handle is provided on the barrel, which serves as the position for the hand of the user when carrying the air cannon on the shoulder, so that the air cannon is ergonomic and can achieve gentle repelling of the target person. During the use of the air cannon, the intensity of the action on the target person is low, and no harm is caused to the target person. It is highly safe and not easy to form an adversarial relationship with the repelled object, which facilitates maintaining a harmonious relationship between the two parties. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic structural diagram of a gentle repelling air cannon according to one embodiment is shown;

[0035] Figure 2 A schematic structural diagram of a gentle repelling air cannon according to another embodiment is shown;

[0036] Figure 3A schematic structural diagram of a flexible projectile according to an embodiment is shown;

[0037] Figure 4 A schematic structural diagram of a gentle repellent air cannon according to another embodiment is shown. DETAILED DESCRIPTION

[0038] The solution provided in this specification is described below in conjunction with the accompanying drawings.

[0039] Figure 1 FIG. 1 shows a schematic diagram of a gentle repelling air cannon according to an embodiment of the present invention, which drives away a target person through directional air. Figure 1 As shown, the air cannon includes:

[0040] An air storage tank 11, used for storing compressed air;

[0041] The gun barrel 12 is used to direct the airflow to impact the target person so as to gently drive the target person away;

[0042] The quick-release valve 13 is used to connect the gas storage tank 11 and the gun barrel 12 and has two states: open and closed;

[0043] A control unit 14 is configured to trigger the quick-release valve 13 to switch from a closed state to an open state according to a control instruction, so that the compressed air in the air storage tank 11 forms an airflow and enters the gun barrel;

[0044] The first outer surface of the air tank 11 is adjacent to the second outer surface of the gun barrel 12. The first outer surface has a preset first curvature, and the second outer surface has a preset second curvature. A groove is formed between the first outer surface and the second outer surface, which serves as a position for the shoulder of the user to place when carrying the air cannon on the shoulder.

[0045] The gun barrel 12 is provided with a grip 15 , which serves as a place for the user's hands to be placed when carrying the air cannon on the shoulder.

[0046] In the embodiment of this specification, the grip 15 can be fixed to the barrel 12 by a clamp.

[0047] In one example, the control unit 14 is a control trigger, and the control instruction is manually issued by the user. When the user carries the air cannon on his shoulder, the control trigger is located at the upper part of the gun barrel.

[0048] In this example, the user manually controls the quick-release valve 13 to open, resulting in a simple and practical structure. The control trigger can be secured to the barrel 12 via a clamp. When the user carries the air cannon on their shoulder, the control trigger is positioned above the barrel. When the user places their hand on the control trigger, a lever arm is formed between the hand and the shoulder point, which balances the lever arm formed between the air tank and the shoulder point, thereby facilitating control of the air cannon's elevation angle.

[0049] In one example, the gun barrel 12 is in the shape of a circular tube with one end open and the other end closed. At least one opening 16 is provided on the gun barrel 12 between the two ends and closer to the open end.

[0050] In this example, when the barrel 12 is in direct contact with the target person's body, if a closed space is formed between the barrel 12 and the human body, the generated airflow will cause a relatively serious impact on the target person's body. By providing at least one opening 16, the safety of the air cannon can be improved and the damage to the target person can be reduced.

[0051] In one example, the air tank 11 is made of steel, and the gun barrel 12 is made of aluminum alloy, so that the overall center of mass of the air cannon is controlled near the quick-release valve.

[0052] In this example, the air tank 11 of the air cannon is made of steel and is heavy, and the barrel 12 of the air cannon is made of aluminum alloy and is light, so that the overall center of mass of the air cannon is controlled near the quick-release valve, that is, the position of the shoulder resistance, and the shoulder resistance point forms a fulcrum.

[0053] The gentle air cannon for repelling people provided in the embodiments of this specification undergoes structural transformation on industrial equipment commonly used in the field of clearing blockages and breaking arches of materials, and applies the bulky industrial equipment across fields to individual portable equipment in the field of security and control. In addition to the basic structures such as the gas tank 11, the barrel 12, the quick-release valve 13, and the control unit 14, the first outer surface of the gas tank 11 and the second outer surface of the barrel 12 are specially designed to be adjacent, the first outer surface has a preset first curvature, the second outer surface has a preset second curvature, and a groove is formed between the first outer surface and the second outer surface, which serves as the position for the shoulder of the user to place the air cannon when the user carries the air cannon on the shoulder. A grip 15 is provided on the barrel 12, which serves as the position for the hand of the user to place the air cannon when the user carries the air cannon on the shoulder, so that the air cannon is ergonomically designed and can achieve gentle repelling of the target person. During the use of the air cannon, the intensity of the air acting on the target person is low, and the target person will not be harmed. The air cannon is highly safe and is not easy to form an adversarial relationship with the repelled object, which facilitates maintaining a harmonious relationship between the two parties.

[0054] Among them, the target person is driven away by directional air, and the slight shock wave brought by the energy released by the high-pressure air will be shot along the nozzle 12 toward the driven object, accompanied by the explosion sound energy, which will make the driven object feel obviously uneasy. Since only directional air is used, it will quickly decay after leaving the nozzle 12, and its effect is the mildest.

[0055] Figure 2 FIG. 1 shows a schematic diagram of the structure of a gentle repelling air cannon according to another embodiment, which uses flexible projectiles to repel target persons. Figure 2 As shown, the air cannon includes:

[0056] An air storage tank 11, used for storing compressed air;

[0057] The gun barrel 12 is used to direct the airflow to impact the target person so as to gently drive the target person away;

[0058] The quick-release valve 13 is used to connect the gas storage tank 11 and the gun barrel 12 and has two states: open and closed;

[0059] A control unit 14 is configured to trigger the quick-release valve 13 to switch from a closed state to an open state according to a control instruction, so that the compressed air in the air storage tank 11 forms an airflow and enters the gun barrel;

[0060] The first outer surface of the air tank 11 is adjacent to the second outer surface of the gun barrel 12. The first outer surface has a preset first curvature, and the second outer surface has a preset second curvature. A groove is formed between the first outer surface and the second outer surface, which serves as a position for the shoulder of the user to place when carrying the air cannon on the shoulder.

[0061] The gun barrel 12 is provided with a grip 15, which serves as a place for the user's hands to rest when carrying the air cannon on the shoulder;

[0062] Flexible projectile 17, used for loading into the gun barrel 12;

[0063] The gun barrel 12 is used to guide the airflow to impact the flexible projectile 17, and the flexible projectile 17 impacts the target person to gently drive the target person away.

[0064] It is understandable that Figure 2 The air cannon shown is Figure 1 The air cannon shown differs only in that it is equipped with a flexible projectile 17 .

[0065] In one example, the outer layer material of the flexible projectile 17 is a microporous foam elastic layer without an inner core or the inner core is a solid rubber ball.

[0066] In this example, the material of the flexible projectile 17 makes it relatively gentle when applied to the human body.

[0067] Furthermore, the interior of the flexible projectile 17 is filled with liquid dye, so that when the flexible projectile 17 impacts the target person, the liquid dye splashes out through the microporous foaming elastic layer.

[0068] In this example, the interior of the flexible projectile 17 is filled with liquid dye. When the projectile hits the target person, the dye splashed out can quickly mark the object, forcing the person to wash quickly, thereby achieving the purpose of driving away.

[0069] In addition, in addition to being filled with liquid dye, the interior of the flexible projectile 17 can also be filled with special perfume or odorant to achieve the purpose of repelling.

[0070] Figure 3 FIG. 1 shows a schematic diagram of a flexible projectile according to an embodiment, wherein flexible projectiles of various structures can be provided for users to choose from. Figure 3 As shown, when using flexible projectiles, flexible projectiles of different weights can be selected according to needs. For example, Figure 3 Medium A is the lightest projectile, with no core inside and only a microporous foam elastic layer; Figure 3 B is a medium-weight projectile with a microporous foam elastic layer as the outer layer and a small solid rubber ball as the inner core; Figure 4 The C in the figure represents a heavier projectile, with a microporous foam outer layer and a heavier solid rubber core. A larger solid rubber ball is associated with a heavier weight, which translates to a heavier projectile. The lighter the projectile, the less kinetic energy it carries at a given initial velocity, resulting in a gentler effect on the body.

[0071] The size of the flexible projectile 17 is adapted to the barrel 12 , and its diameter is the same as or slightly smaller than the diameter of the barrel 12 . For example, the diameter of the barrel 12 is 18 cm, and the diameter of the flexible projectile 17 is also 18 cm.

[0072] In addition, the air cannon's air tank 11 is made of steel and has no mountings at the bottom, making it easy to place it upright. The air cannon's barrel 12 is made of aluminum alloy and is relatively light. After loading heavy projectiles, the overall center of mass is controlled near the quick-release valve. When shoulder-carrying, the center of gravity falls on the shoulder, and the shoulder-carrying position is in the recessed area near the quick-release valve 13. This allows the shooter to maintain the balance of the gun body with only a small amount of effort, making aiming effortless. After loading light projectiles, the center of gravity moves backward, causing the gun barrel 12 to tend to lift up. The control trigger is designed to be located on the upper part of the gun body. When the shooter uses his arms to operate it, he can use the weight of his arms to press down the gun barrel 12 to maintain the balance of the gun body.

[0073] Figure 4 FIG. 1 shows a schematic diagram of the structure of a gentle repelling air cannon according to another embodiment, in which the target person is aimed at by an aiming auxiliary device. Figure 4 As shown, the air cannon includes:

[0074] An air storage tank 11, used for storing compressed air;

[0075] The gun barrel 12 is used to direct the airflow to impact the target person so as to gently drive the target person away;

[0076] The quick-release valve 13 is used to connect the gas storage tank 11 and the gun barrel 12 and has two states: open and closed;

[0077] A control unit 14 is configured to trigger the quick-release valve 13 to switch from a closed state to an open state according to a control instruction, so that the compressed air in the air storage tank 11 forms an airflow and enters the gun barrel;

[0078] The first outer surface of the air tank 11 is adjacent to the second outer surface of the gun barrel 12. The first outer surface has a preset first curvature, and the second outer surface has a preset second curvature. A groove is formed between the first outer surface and the second outer surface, which serves as a position for the shoulder of the user to place when carrying the air cannon on the shoulder.

[0079] The aiming assisting device 18 is used to determine whether the current elevation angle of the air cannon is suitable, and to send an indication signal indicating whether the elevation angle is suitable.

[0080] The air cannon projectile provided in the embodiment of this specification has a low initial velocity and is significantly affected by air resistance. The aiming assist device can improve the user's shooting hit rate at medium distances.

[0081] In one example, the aiming aid 18 includes:

[0082] a laser rangefinder to determine the target distance between the air cannon and the target person;

[0083] Pitch angle sensor, used to determine the current first air cannon elevation angle;

[0084] a ballistic computer for determining an appropriate second air cannon elevation angle adapted to the target distance, comparing the magnitude relationship between the first air cannon elevation angle and the second air cannon elevation angle to obtain a comparison result, and controlling the activation of the signal light assembly according to the comparison result;

[0085] The signal light assembly is used to send out an indication signal for indicating whether the elevation angle is appropriate.

[0086] In this example, the ballistic computer can accurately determine the appropriate second air cannon elevation angle that is adapted to the target distance, thereby prompting the user whether the current elevation angle is appropriate.

[0087] For example, the ballistic computer first inputs information using the input selector knob. This information indicates the mass of the loaded projectile and the gas pressure in the air tank, which can be 0.8 MPa. The air tank is typically inflated quickly using an external air pump, while an internal mobile inflator allows for precise adjustment of the tank pressure or slow inflation. The shooter then uses a laser rangefinder to locate the distance between the air cannon and the target. The ballistic computer then interpolates and calculates the appropriate air cannon elevation angle by consulting a pre-calibrated firing table. By comparing the appropriate air cannon elevation angle with the current air cannon elevation angle indicated by the elevation sensor, the ballistic computer provides feedback to the shooter by illuminating a signal light. The shooter continuously adjusts the air cannon elevation angle until the appropriate elevation light appears, then fires. The ballistic computer does not provide any assistance with horizontal azimuth, requiring the shooter to adjust the horizontal azimuth independently.

[0088] In addition, instead of the above interpolation calculation, the parameter fitting method can also be used to calculate the appropriate air cannon elevation angle. The data of the shooting table is fitted with a high-order function, and the distance is substituted into this function for calculation to obtain the appropriate air cannon elevation angle.

[0089] It is understandable that the air tank 11 of the air cannon is also provided with a gas filling port one-way valve and some other accessories. For the sake of simplicity, only the main accessories are drawn in the figure, and the rest are not shown.

[0090] Furthermore, the signal light assembly includes:

[0091] A first signal light is used to indicate that the elevation angle of the first air cannon is higher than the elevation angle of the second air cannon, and the difference angle is greater than a first preset angle;

[0092] A second signal light is used to indicate that the elevation angle of the first air cannon is higher than the elevation angle of the second air cannon, and the difference angle is between the second preset angle and the first preset angle, and the second preset angle is smaller than the first preset angle;

[0093] A third signal light is used to indicate that the first air cannon elevation angle is consistent with the second air cannon elevation angle, and the difference angle is less than the second preset angle;

[0094] A fourth signal light is used to indicate that the elevation angle of the first air cannon is lower than the elevation angle of the second air cannon, and the difference angle is between the second preset angle and the first preset angle;

[0095] The fifth signal light is used to indicate that the elevation angle of the first air cannon is lower than the elevation angle of the second air cannon, and the difference angle is greater than the first preset angle.

[0096] In the embodiments of this specification, when using an air cannon, the signal light assembly can be arranged vertically on the cannon barrel, and the order of arrangement from highest to lowest can be: first signal light, second signal light, third signal light, fourth signal light, fifth signal light. The third signal light is located in the middle. The distance between the first signal light and the second signal light is slightly larger than the distance between the second signal light and the third signal light. Similarly, the distance between the fourth signal light and the fifth signal light is slightly larger than the distance between the third signal light and the fourth signal light.

[0097] For example, five signal lights are provided near the end of the gun barrel 12 away from the gun port. The ballistic computer provides feedback to the shooter by lighting one of the five signal lights. These five signal lights are defined in descending order, corresponding to elevation angles: too high elevation angle (e.g., angle difference greater than 15 degrees, red light), high elevation angle (e.g., angle difference between 5 and 15 degrees, yellow light), appropriate elevation angle (e.g., angle difference within 5 degrees, green light), low elevation angle (e.g., angle difference between -5 and -15 degrees, yellow light), and too low elevation angle (e.g., angle difference greater than -15 degrees, red light).

[0098] In the embodiment of this specification, the signal light assembly can also be on the grip; when using the air cannon, the signal light assembly is located on the side of the grip facing the shooter, which is convenient for the shooter to check.

[0099] In addition, the aforementioned shooting table can be obtained by experiment. Specifically, the shooting table can be obtained by calibrating shooting at different elevation angles in a controlled laboratory environment while keeping the pressure of the gas tank constant. Record the corresponding relationship z=f(θ) between the elevation angle (θ) and the drop distance z of projectiles of different weights between the maximum range elevation angle and the minimum elevation angle. After not considering the high-elevation-angle shooting situation greater than the maximum range elevation angle, the function can be understood as a monotonic function that increases with θ, which is convenient for valuation interpolation. Since the flexible projectiles in the embodiments of this specification are large in size and have small thrust, air resistance will be an important factor affecting the drop distance. Therefore, according to the different air pressures in the area of ​​use, the shooting table can be divided into a plain shooting table and a plateau shooting table, which are obtained through experiments at different altitudes.

[0100] According to another embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed in a computer, the computer is caused to execute the method executed by the ballistic computer.

[0101] According to yet another embodiment, a computing device is provided, including a memory and a processor, wherein the memory stores executable code, and when the processor executes the executable code, the method described in the ballistic computer is implemented.

[0102] Those skilled in the art will appreciate that, in one or more of the above examples, the functions described herein may be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions may be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium.

[0103] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gentle repelling air cannon comprising: Air receiver tanks, used to store compressed air; a gun barrel, for directing airflow to impact a target person, so as to gently drive the target person away; A quick-release valve, used to connect the gas tank and the gun barrel, having two states: open and closed; A control unit, configured to trigger the quick-release valve to switch from a closed state to an open state according to a control instruction, so that the compressed air in the air storage tank forms an airflow and enters the gun barrel; The first outer surface of the air tank is adjacent to the second outer surface of the gun barrel, the first outer surface has a preset first curvature, the second outer surface has a preset second curvature, and a groove is formed between the first outer surface and the second outer surface, which serves as a position for the shoulder of a user to place when carrying the air cannon on his shoulder. The gun barrel is provided with a grip, which serves as a position for the user to place his hands when carrying the air cannon on his shoulder.

2. The air cannon according to claim 1, wherein: The control unit is a control trigger, and the control instruction is manually issued by the user. When the user carries the air cannon on his shoulder, the control trigger is located on the upper part of the gun barrel.

3. The air cannon according to claim 1, wherein: The gun barrel is in the shape of a circular tube with one end open and the other end closed. At least one opening is provided on the gun barrel between the two ends and closer to the open end.

4. The air cannon according to claim 1, wherein: The air storage tank is made of steel, and the gun barrel is made of aluminum alloy, so that the overall center of mass of the air cannon is controlled near the quick-discharge valve.

5. The air cannon according to claim 1, wherein: Also includes: a flexible projectile for loading into the gun barrel; The gun barrel is used to guide the airflow to impact the flexible projectile, and the flexible projectile impacts the target person to gently drive the target person away.

6. The air cannon according to claim 5, wherein: The outer layer material of the flexible projectile is a microporous foam elastic layer, and the flexible projectile has no inner core or the inner core is a solid rubber ball.

7. The air cannon according to claim 6, wherein: The interior of the flexible projectile is filled with liquid dye, so that when the flexible projectile impacts a target person, the liquid dye splashes out through the microporous foaming elastic layer.

8. The air cannon of claim 1, wherein: Also includes: The aiming assist device is used to determine whether the current elevation angle of the air cannon is suitable and to send an indication signal indicating whether the elevation angle is suitable.

9. The air cannon of claim 8, wherein: The aiming assist device comprises: a laser rangefinder to determine the target distance between the air cannon and the target person; Pitch angle sensor, used to determine the current first air cannon elevation angle; a ballistic computer for determining an appropriate second air cannon elevation angle adapted to the target distance, comparing the magnitude relationship between the first air cannon elevation angle and the second air cannon elevation angle to obtain a comparison result, and controlling the activation of the signal light assembly according to the comparison result; The signal light assembly is used to send out an indication signal for indicating whether the elevation angle is appropriate.

10. The air cannon of claim 9, wherein: The signal light combination comprises: A first signal light is used to indicate that the elevation angle of the first air cannon is higher than the elevation angle of the second air cannon, and the difference angle is greater than a first preset angle; A second signal light is used to indicate that the elevation angle of the first air cannon is higher than the elevation angle of the second air cannon, and the difference angle is between the second preset angle and the first preset angle, and the second preset angle is smaller than the first preset angle; A third signal light is used to indicate that the first air cannon elevation angle is consistent with the second air cannon elevation angle, and the difference angle is less than the second preset angle; A fourth signal light is used to indicate that the elevation angle of the first air cannon is lower than the elevation angle of the second air cannon, and the difference angle is between the second preset angle and the first preset angle; The fifth signal light is used to indicate that the elevation angle of the first air cannon is lower than the elevation angle of the second air cannon, and the difference angle is greater than the first preset angle.

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