Bird repelling cannon and bird repelling cannon system

Abstract

The present application provides a bird repelling cannon, wherein the bird repelling projectile has an electromagnetic induction fuse. The bird repelling cannon includes a launch tube, and a projectile movement channel is provided inside the launch tube. The projectile movement channel communicates with the outside through the outlet end of the launch tube. It further includes a launching device that can drive the bird repelling projectile located in the projectile movement channel to move along the axial direction of the launch tube so as to be launched to the outside through the outlet end. It also includes an electric energy storage unit that can be externally connected to a power source to store electric energy. It further includes a magnetic field generating unit that is arranged outside the launch tube and is connected to the electric energy storage unit. The electric energy storage unit supplies the stored electric energy to the magnetic field generating unit so that the magnetic field generating unit generates an ignition magnetic field in the projectile movement channel, and the electromagnetic induction fuse of the bird repelling projectile passing through the ignition magnetic field can be instantly ignited. It can ignite the bird repelling projectile in an extremely short time; being ignited during movement, it is not easy to get stuck in the launching equipment, further improving the safety factor.

Description

Technical Field

[0001] This application relates to the technical field of bird repelling devices, and in particular to a bird repelling cannon. This application also provides a bird repelling cannon system. Background Art

[0002] The takeoff and landing processes of airplanes are the stages most prone to bird strikes. More than 90% of bird strikes occur in the airport and the airspace near the airport, and 50% occur in the airspace below 30 meters. Therefore, bird strike incidents have always posed a serious threat to the flight safety of airplanes. The existing mainstream bird repelling devices basically use acoustic (such as acoustic wave bird repellers) or optical (such as laser bird repellers, scary eyes) principles to repel birds. These devices are easily adapted by birds after being used multiple times. It is very difficult to achieve the bird repelling goal simply by sound and optical effects, and these devices will bring unnecessary acoustic and light pollution to the airport and the surrounding environment, and even have a certain impact on operators and surrounding residents.

[0003] After continuous attempts, some airports have started to use physical projectiles to repel birds. Double-firecrackers and titanium thunder bombs are two of the most commonly used and typical bird repelling projectiles. They generally adopt a two-stage gunpowder ignition process, directly igniting to achieve the first-stage deflagration propulsion effect, making the physical projectile fly towards the birds, and completing the second-stage explosion in the air near the birds, generating multiple sensory effects such as sound, flash, and shock wave. Years of application practice have shown that this type of bird repelling projectile is currently the best and most efficient bird repelling method, and it is the most difficult for birds to adapt to.

[0004] However, there are also many practical problems with existing bird repelling projectiles.

[0005] Firstly, the current physical projectiles need an open flame or an electric spark to ignite the fuse. Therefore, ignition requires special assembly requirements. For example, to ensure smooth ignition, a specific connection structure needs to be established between the fuse ignition device and the bird repelling projectile. This process requires professional personnel to operate personally, the operation is cumbersome, the degree of automation is low, and at the same time, the number of projectiles that can be ignited each time is very limited, and the timeliness is poor. Only the operation and use require a large amount of manpower and time. And the inconvenience and limitations in operation will further affect the flexibility and applicability of use, and it is very difficult to adjust according to different occasions and scenarios. Moreover, even when using an open flame or an electric spark to ignite the fuse, it still takes a certain period of time to burn the fuse to ignite it, the timeliness is poor, and the launch efficiency is relatively low.

[0006] Secondly, in case of precipitation weather, the method of using an open flame and an electric spark to ignite the fuse is very inapplicable. Especially the electric spark method obviously has great potential safety hazards and may cause safety accidents such as fire and explosion due to short circuit.

[0007] Finally, most current physical projectiles are designed in a two-stage manner. The ignition of the first stage requires an explosion to generate propulsion force, which poses challenges to the safety of the launching process. For example, after the first stage of the physical projectile explodes and moves in the launching device, it may get stuck, causing the second stage to explode in the launching device. There may also be unpredictable explosions due to ignition errors or other accidents, which are tests for the operators and the launching device. Summary of the Invention

[0008] To solve the above technical problems, the present application provides a bird repellent cannon that can ignite the bird repellent projectile non-contact; can ignite the bird repellent projectile in an extremely short time; has a high degree of automation, can be continuously launched, and basically requires no manual participation; has high safety such as no open flame; the bird repellent projectile is ignited during movement and is not easily stuck in the launching device, further improving the safety factor.

[0009] The present application also provides a bird repellent cannon system with a fireless and smokeless ignition process; the ignition is rapid and safe.

[0010] To solve the above problems, the present application provides a bird repellent cannon, in which the bird repellent projectile has an electromagnetic induction fuse. The bird repellent cannon includes a launch tube, and a projectile movement channel is provided inside the launch tube. The projectile movement channel communicates with the outside through the outlet end of the launch tube; it also includes a launch device that can drive the bird repellent projectile located in the projectile movement channel to move along the axial direction of the launch tube so as to be launched to the outside through the outlet end; it further includes an electric energy storage unit that can be externally connected to a power source to store electric energy; it also includes a magnetic field generating unit that is arranged outside the launch tube and is connected to the electric energy storage unit. The electric energy storage unit provides the stored electric energy to the magnetic field generating unit so that the magnetic field generating unit generates an ignition magnetic field in the projectile movement channel, and the electromagnetic induction fuse of the bird repellent projectile passing through the ignition magnetic field can be instantly ignited.

[0011] In a schematic embodiment of the bird repellent cannon, the electric energy storage unit has an energy storage capacitor. It can instantly provide a large amount of electric energy to the magnetic field generating unit so that the magnetic field generating unit quickly generates an ignition magnetic field, and the duration of the ignition magnetic field generated by the magnetic field generating unit can be controlled by the amount of stored electric charge.

[0012] In a schematic embodiment of the bird repellent cannon, the bird repellent cannon further includes a control unit. When the launch device starts to drive the bird repellent projectile, the control unit issues a release signal; the electric energy storage unit releases the stored electric energy to the magnetic field generating unit after receiving the release signal. It can control the intermittent operation of the magnetic field generating unit to protect the magnetic field generating unit and save energy to the greatest extent.

[0013] In a schematic embodiment of the bird repellent cannon, the magnetic field generating unit has a series resonant high-frequency inverter circuit, which can generate a high-frequency alternating electromagnetic field to form an ignition magnetic field. It can quickly generate a high-intensity electromagnetic field to instantaneously ignite the electromagnetic induction fuse of the bird repellent projectile.

[0014] In a schematic embodiment of the bird repellent cannon, the bird repellent cannon further includes a photoelectric sensor disposed in the projectile movement channel. Along the launch stroke of the bird repellent projectile, the photoelectric sensor is disposed before the magnetic field generating unit, and the photoelectric sensor outputs a control signal after sensing the bird repellent projectile; the electrical energy storage unit releases the stored electrical energy to the magnetic field generating unit after receiving the control signal. It can sense and control the optimal timing for the magnetic field generating unit to generate a magnetic field, achieving precise ignition.

[0015] In a schematic embodiment of the bird repellent cannon, the magnetic field generating unit is disposed outside the outlet end, and it can form an ignition magnetic field in the projectile movement channel at the outlet end, so that the electromagnetic induction fuse of the bird repellent projectile is ignited when the bird repellent projectile passes through the outlet end. After the bird repellent projectile is ignited at the outlet end, it can be directly discharged from the launch tube, which can avoid the situation of the bird repellent projectile being blocked in the launch tube and causing a chamber explosion.

[0016] In a schematic embodiment of the bird repellent cannon, the caliber of the projectile movement channel near the outlet end is larger than that of the projectile movement channel at other positions. This can further prevent the bird repellent projectile from being blocked at the outlet end and remaining in the launch tube after being ignited, further avoiding the occurrence of a chamber explosion.

[0017] In a schematic embodiment of the bird repellent cannon, the launch tube is further provided with an air inlet communicating with the projectile movement channel; the launch device is a gas supply assembly, which can supply compressed gas to the projectile movement channel through the air inlet to drive the bird repellent projectile to move along the launch tube. The pneumatic ejection method is fireless and smokeless throughout the process, energy-saving and environmentally friendly, and can quickly and orderly achieve the continuous launch of multiple bird repellent projectiles.

[0018] This application also provides a bird repellent cannon system, including a bird repellent cannon, and further including a bird repellent projectile equipped with a closed-loop heating element. The closed-loop heating element passing through the ignition magnetic field will form a closed-loop short-circuit current to convert electromagnetic energy into heat energy to ignite the bird repellent projectile.

[0019] In a schematic embodiment of the bird repellent cannon system, the closed-loop heating element is a circular heating sheet. When the bird repellent projectile is located in the projectile movement channel, its axis direction is collinear with the axial direction of the launch tube. This enables the magnetic induction lines of the magnetic field to pass through the end face of the circular heating sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0021] Figure 1 A structural schematic diagram of a schematic implementation of a bird repellent cannon.

[0022] Figure 2 A partial cross-sectional view of an implementation of a bird repellent cannon.

[0023] Figure 3 A schematic diagram of a schematic implementation when a bird repellent projectile passes through an ignition magnetic field.

[0024] Figure 4 A structural schematic diagram of an implementation of a gas supply unit of a bird repellent cannon.

[0025] Figure 5 A cross-sectional view of a schematic implementation of a bird repellent projectile.

[0026] Figure 6 A schematic diagram of a schematic implementation of a closed-loop heating element.

[0027] Figure 7 A schematic diagram of a closed-loop heating element in a magnetic field.

[0028] Among them, 10 - launch tube, 11 - outlet end, 12 - air inlet, 13 - projectile movement channel, 20 - launch device, 30 - electrical energy storage unit, 40 - magnetic field generation unit, 50 - control unit, 60 - bird repellent projectile, 61 - closed-loop heating element. Specific implementation mode

[0029] For a clearer explanation of the overall concept of this application, the following will be further elaborated in detail by way of examples in combination with the accompanying drawings of the specification.

[0030] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited by the specific embodiments disclosed below.

[0031] In this application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Figure 1 The structure diagram of a schematic embodiment of a bird repelling gun. As Figure 1 shown, the bird repelling gun includes a launch tube 10, a launch device 20, a magnetic field generating unit 40, and an electric energy storage unit 30. Among them,

[0034] A projectile movement channel 13 is provided inside the launch tube 10. One end of the launch tube 10 with an outlet is the outlet end 11. The projectile movement channel 13 communicates with the outside through the outlet end 11 of the launch tube 10. At the same time, reference can be made to Figure 2 . The launch device 20 is arranged at the other end of the launch tube 10, and it can drive the bird repelling projectile 60 located in the projectile movement channel 13 at the other end of the launch tube 10, so that the bird repelling projectile moves along the axial direction of the launch tube, moves from the other end of the launch tube to the outlet end and reaches the highest speed at the outlet end, and is launched to the outside through the outlet end. The electric energy storage unit 30 can be externally connected to a power source to store electric energy. The magnetic field generating unit 40 is arranged outside the launch tube 10. Reference can be made to Figure 2 , and it is connected to the electric energy storage unit 30. Reference can be made to Figure 1 or Figure 2 . The electric energy storage unit provides the stored electric energy to the magnetic field generating unit, so that the magnetic field generating unit generates an ignition magnetic field in the projectile movement channel. Reference can be made to Figure 3 , Figure 3 is a schematic diagram of the bird repelling projectile 60 passing through the ignition magnetic field. The electromagnetic induction fuse of the bird repelling projectile passing through the ignition magnetic field can be instantly ignited.

[0035] During the operation of the bird repelling gun, under the power supply of the electric energy storage unit 30, the magnetic field generating unit 40 forms an ignition magnetic field in the projectile movement channel 13 of the launch tube 10. Reference can be made to Figure 3 , Figure 3 is a schematic diagram of the bird repelling projectile passing through the ignition magnetic field. The bird repelling projectile 60 is initially placed at the other end of the projectile movement channel 13 relative to the outlet end 11. The launch device 20 gives the bird repelling projectile 60 a driving force along the projectile movement channel 13 at the other end, so that the bird repelling projectile 60 accelerates and moves along the axial direction of the projectile movement channel 13 (reference can be made to Figure 2In the direction of the arrow in the figure, when the bird repellent bomb 60 moves in the projectile movement channel 13, it passes through the ignition magnetic field. When passing through the ignition magnetic field, the electromagnetic induction fuse of the bird repellent bomb 60 is instantaneously ignited. At this time, the bird repellent bomb 60 has the highest speed. After the electromagnetic induction fuse is ignited, it continues to move along the axial direction of the projectile movement channel 13 until it shoots out from the outlet end 11 of the launch tube 10. After the electromagnetic induction fuse of the bird repellent bomb 60 is ignited, it ignites the fuse inside it. After the fuse is ignited, it burns inside the bird repellent bomb 60 for a period of time and then ignites the explosive in the bird repellent bomb 60, realizing an airburst after flying in the air for a period of time, thereby completing the expulsion of birds.

[0036] The design of the magnetic field generating unit 40 of the bird repellent gun enables the bird repellent bomb 60 to be internally ignited when passing through the magnetic field at high speed. This non-contact ignition method does not need to consider establishing a static cooperation relationship between the bird repellent bomb 60 and the ignition device. In particular, there is no need to establish a direct connection structure, such as establishing a wire connection between the launch device and the bird repellent bomb. It will not cause structural limitations to the launch, reloading, and loading of the bird repellent bomb 60, providing particularly significant convenience in terms of use and operation. For example, it provides the possibility of automatic reloading and automatic launch ignition, which can greatly save the labor cost and time cost invested in use and operation.

[0037] More importantly, the magnetic field generating unit 40 generates the ignition magnetic field through the control of the electric energy storage unit 30 (see Figure 1 ). After the electric energy storage unit is connected to an external power supply and stores electric energy, it provides the stored electric energy to the magnetic field generating unit. The magnetic field generating unit starts to work and generates the ignition magnetic field when it receives the power supply from the electric energy storage unit. The advantage of this design is that the time for the magnetic field generating unit to generate the ignition magnetic field can be controlled by controlling the power supply from the electric energy storage unit to the magnetic field generating unit. For example, when the ignition magnetic field is not needed, the circuit between the electric energy storage unit and the magnetic field generating unit is disconnected, and the magnetic field generating unit cannot generate the ignition magnetic field. And the electric energy storage unit can instantaneously generate an impact current to the magnetic field generating unit when it is connected to the magnetic field generating unit after storing electric energy, enabling the magnetic field generating unit to instantaneously generate a strong enough magnetic field to ignite the electromagnetic induction fuse. In a preferred embodiment, the electric energy storage unit has an energy storage capacitor. When the external power supply charges the electric energy storage unit, a certain voltage can be stored at both ends of the energy storage capacitor. Then the external power supply stops supplying power, and the energy storage capacitor starts to supply electric energy to the magnetic field generating unit 40 connected to the electric energy storage unit. This electric energy is provided by the energy storage capacitor. The energy storage capacitor has the advantage of fast discharge. It can provide the stored electric energy to the magnetic field generating unit 40 instantaneously or within a few milliseconds, so that the magnetic field generating unit 40 can quickly generate the ignition magnetic field.

[0038] To improve the automation level of the bird repellent cannon and further save energy, the electric energy storage unit 30 can supply power to the magnetic field generating unit intermittently. That is to say, the electric energy storage unit 30 supplies power to the magnetic field generating unit 40 only when the bird repellent projectile 60 moves in the projectile movement channel 13. On the one hand, this reduces the pressure on the continuous operation of the circuit and has a certain protective effect on the circuit. On the other hand, it also saves electric energy. In a preferred embodiment, the bird repellent cannon further includes a control unit 50. Refer to Figure 2 , when the launching device 20 starts to drive the bird repellent projectile 60, the control unit 50 issues a release signal. After receiving the release signal, the electric energy storage unit 30 releases the stored electric energy to the magnetic field generating unit 40. Specifically, when the bird repellent cannon receives the firing command, the launching device 20 starts to operate and gives a driving force to the bird repellent projectile 60 placed in the projectile movement channel 13. To achieve reliable ignition, at this time, the control unit 50 issues a release signal to the electric energy storage unit 30, and the electric energy storage unit 30 starts to supply power to the magnetic field generating unit 40. The magnetic field generating unit 40 generates an ignition magnetic field. Subsequently, under the action of the driving force, the bird repellent projectile 60 moves along the axial direction of the launch tube 10 until its internal electromagnetic induction fuse is ignited when passing through the ignition magnetic field. The movement time of the bird repellent projectile 60 in the projectile movement channel 13 is usually several tens of milliseconds. Therefore, the electric energy storage unit 30 has to operate simultaneously when the bird repellent projectile 60 is about to be launched, so that the ignition magnetic field has enough time to generate sufficient electromagnetic energy to ignite the bird repellent projectile 60. The setting of the control unit 50 avoids the continuous power supply of the electric energy storage unit 30 to the magnetic field generating unit 40, prevents the damage caused by the continuous operation of the magnetic field generating unit 40, and enables the magnetic field generating unit 40 to have a longer service life. In addition, the control unit 50 controls the electric energy storage unit 30 to supply power to the magnetic field generating unit 40 in a pulsed manner, so that the generation time of the ignition magnetic field matches the launching of the bird repellent projectile 60 by the launching device 20, achieving the effect of instant ignition of the bird repellent projectile 60 during the launch process. This process will be repeated for each launch of the bird repellent projectile 60, which improves the automation level of the automatic launch and non-contact ignition of the bird repellent cannon.

[0039] Among them, in a preferred embodiment, the magnetic field generating unit 40 has a series-resonant high-frequency inverter circuit, which can generate a high-frequency alternating electromagnetic field, and the high-frequency alternating electromagnetic field forms an ignition magnetic field. The series-resonant high-frequency inverter circuit releases a large amount of electromagnetic energy when powered on, and this electromagnetic energy is sufficient to ignite the electromagnetic induction fuse of the bird repellent projectile 60 when it passes by. After the control unit 50 sends a release signal to the electrical energy storage unit 30, the magnetic field generating unit 40 is powered on, and the series-resonant high-frequency inverter circuit starts to work, generating an ignition magnetic field formed by the high-frequency alternating electromagnetic field. At this time, the bird repellent projectile 60 has not yet moved to the ignition magnetic field area, so the ignition magnetic field is in an idle state at this time. To achieve reliable ignition, this idle state is inevitable. The inverter circuit can form a stable and high-intensity ignition magnetic field in this idle state, which is beneficial for the inverter circuit to quickly switch from the energy storage standby state to the full-power output state, so that the bird repellent projectile 60 can be instantly ignited when it passes through the ignition magnetic field. After the bird repellent projectile 60 is ignited and launched out of the launch tube 10, the electrical energy storage unit 30 stops supplying power to the magnetic field generating unit 40, and the inverter circuit stops working. Because the bird repellent projectile 60 moves in the projectile movement channel 13 for a very short time, usually only a few milliseconds, the short-term idle state of the inverter circuit is allowed and will not damage the inverter circuit or reduce the service life of the inverter circuit.

[0040] In an embodiment of the present application, the bird repellent gun may further include a photoelectric sensor disposed in the projectile movement channel 13. In the launch stroke of the bird repellent projectile 60, the photoelectric sensor is disposed before the magnetic field generating unit 40, and the photoelectric sensor will output a control signal after sensing the bird repellent projectile 60; the electrical energy storage unit 30 instantly releases electrical energy to the magnetic field generating unit 40 after receiving the control signal. By providing a photoelectric sensor that can sense the passing of the bird repellent projectile 60 and output a control signal, the magnetic field generating unit 40 can generate an ignition magnetic field according to the control signal, so that the ignition magnetic field has been generated when the bird repellent projectile 60 passes through the ignition area, thereby enabling the electromagnetic induction fuse in the bird repellent projectile 60 to be successfully ignited, and then precise ignition can be achieved. On the one hand, it can enable the ignition magnetic field to accurately ignite each launched bird repellent projectile. On the other hand, compared with starting the ignition magnetic field just when the bird repellent projectile is launched, setting the photoelectric sensor can make the working time of the magnetic field generating unit shorter, which is beneficial for the longer service life of the circuit in the magnetic field generating unit. In another embodiment, it can be timed. When the launch device just drives the bird repellent gun, timing starts, and the magnetic field generating unit is started to generate an ignition magnetic field at twenty milliseconds. After the movement of the bird repellent projectile in the launch tube, the ignition magnetic field has been generated before the bird repellent projectile passes through the ignition area.

[0041] To prevent the situation of launch failure caused by the bird repellent projectile 60 being stuck in the projectile movement channel 13, etc., the magnetic field generating unit 40 is disposed outside the outlet end 11, and reference can be made to Figure 2, which can form an ignition magnetic field in the projectile movement channel 13 at the outlet end 11, as can be seen in Figure 3 . Since the bird repellent projectile 60 always moves at a high speed in the projectile movement channel 13, the bird repellent projectile 60 also has a considerable speed when passing through the ignition magnetic field. Therefore, the magnetic field generating unit 40 is arranged outside the outlet end 11, and can be ignited only when the bird repellent projectile 60 passes through the outlet end 11. At this time, the bird repellent projectile 60 with speed can naturally separate from the launch tube 10 at the outlet end 11 and be successfully launched outside the bird repellent gun, without being blocked by the projectile movement channel 13 after ignition, effectively avoiding the risk of chamber explosion. When the bird repellent projectile 60 has not moved to the ignition magnetic field position in the projectile movement channel 13 and is blocked and cannot be ejected, at this time the bird repellent projectile 60 is not ignited. Even if the bird repellent projectile remains in the launch tube, there is no risk at all. Even, it can be re-launched after checking the reason for the failure to eject. Of course, the magnetic field generating unit can also be arranged inside the launch tube at the outlet end, as long as it can ignite the electromagnetic induction fuse of the bird repellent projectile at the outlet end.

[0042] For the further optimization of igniting the bird repellent projectile at the outlet end, the caliber of the projectile movement channel 13 near the outlet end 11 is larger than that of the projectile movement channel 13 at other positions, as can be seen in Figure 2 . This design can prevent the bird repellent projectile 60 from being blocked and unable to be ejected normally when passing near the outlet end 11. As long as the bird repellent projectile 60 has a certain speed when passing near the outlet end 11, the bird repellent projectile 60 will definitely be ejected from near the outlet end 11 with a larger caliber, fundamentally avoiding the risk of chamber explosion of the bird repellent projectile 60.

[0043] In one embodiment, the ignition magnetic field is an alternating magnetic field. To achieve instantaneous ignition of the electromagnetic induction fuse in the bird repellent projectile 60, the magnetic field direction is usually set as Figure 3 shown in the figure. Of course, it is not limited to this direction design. Therefore, the bird repellent projectile 60 can be instantaneously ignited by the ignition magnetic field when passing through the ignition magnetic field. Even during the high-speed launch of the bird repellent projectile 60, non-contact instantaneous ignition can be achieved. Therefore, the driving method of the bird repellent projectile 60 does not need to rely on the explosion propulsion section in the first stage of the existing double-stage solid projectile. Without the explosion propulsion section in the first stage, the explosion section of the bird repellent projectile 60 can still be successfully ignited during movement. Therefore, there are more possibilities for the propulsion driving method of the bird repellent projectile 60.

[0044] For example, in a preferred embodiment, the bird repellent projectile 60 provided by the present application can be completely launched to a high altitude by pneumatic means. Before the bird repellent projectile 60 is driven away from the launch tube 10, the electromagnetic induction fuse can be ignited by the magnetic field generating unit 40. When the bird repellent projectile 60 reaches a certain high altitude position, the bird repellent projectile 60 explodes. In a specific embodiment, the launch tube 10 is further provided with an air inlet 12 communicating with the projectile movement channel 13, as can be seen inFigure 1 ; The launching device 20 is a gas supply component, as can be seen in Figure 4 , the gas supply component includes an air compressor, a gas storage tank, and a launching tank. The gas storage tank is used to store the compressed air prepared by the air compressor. The launching tank is connected to the gas storage tank, and the gas storage tank transports the compressed air to the launching tank. The launching tank is connected to the air inlet 12 of the launching tube 10 through a valve. It can supply compressed gas to the projectile movement channel 13 through the air inlet 12 to drive the bird repellent projectile 60 to move along the axial direction of the launching tube 10. This cold launch method does not require consumables such as heating wires and gunpowder required by traditional launch methods, only compressed air, so the pneumatic launch is more economical. After the launch is completed, the gas can return to the atmosphere, and no black smoke generated by the combustion of the launch gunpowder in the traditional launch process is generated during the launch. No other substances are generated during the launch process. The pneumatic launch method is more environmentally friendly, and the launch materials required for the pneumatic launch are easy to obtain. Of course, in addition to the pneumatic method, those skilled in the art can understand that the bird repellent projectile 60 can also be provided with the driving force for launch by any technical means that may be used in the prior art.

[0045] Due to the unpredictability of explosion propulsion, existing solid projectiles cannot effectively and precisely control their own propulsion height, let alone adapt to different usage scenarios and requirements. The bird repellent gun of the present application abandons the method of launching the bird repellent projectile 60 into the air through explosion propulsion. Using other driving methods will not affect its internal ignition. For example, through the pneumatic driving method, the lifting height of the bird repellent projectile 60 can be more precisely controlled, and according to different usage scenarios and requirements, it is very easy to change flexibly. For example, the lifting height of the bird repellent projectile 60 can be controlled by precisely controlling the pressure of the driving gas.

[0046] Regardless of whether the launching device 20 is pneumatic or other driving methods, the bird repellent gun of the present application can adopt a cold launch device 20. When the bird repellent projectile 60 is in the projectile movement channel 13 and has not passed through the ignition magnetic field period, its electromagnetic induction fuse will not be ignited until the bird repellent projectile 60 moves to the exit end 11, and the electromagnetic induction fuse is ignited. Moreover, after the bird repellent projectile 60 passes through the acceleration in the projectile movement channel 13, it reaches the maximum movement speed at the exit end 11. Therefore, it can be smoothly ejected from the launching tube 10 after ignition, which significantly improves the safety of the bird repellent gun during use and can effectively prevent safety hazards such as chamber explosion caused by premature ignition and unsuccessful launch (encountering jams or insufficient driving force in the launching tube 10).

[0047] The present application also provides a bird repellent gun system, including a bird repellent gun, and further including a bird repellent projectile 60 equipped with a closed-loop heating element 61, as can be seen in Figure 5, the closed-loop heating element 61 passing through the ignition magnetic field will form a closed-loop short-circuit current to convert electromagnetic energy into heat energy to ignite the bird repellent bomb 60. When the bird repellent bomb 60 passes through the ignition magnetic field, the alternating electromagnetic field passes through its closed-loop heating element 61. Refer to Figure 7 , Figure 7 As shown, the magnetic induction lines pass through the closed-loop heating element from the paper surface into the paper. It can be imagined that the magnetic induction lines of the alternating electromagnetic field quickly switch between the two directions of passing through the paper surface into the paper and passing through the paper surface outwards, so that the magnetic flux passing through the closed-loop heating element changes. According to the principle of electromagnetic induction, a short-circuit closed-loop current is generated on the closed-loop heating element 61. Then, according to Joule's law, the current flowing on the closed-loop heating element 61 generates heat energy to increase the temperature of the closed-loop heating element 61, thereby converting electromagnetic energy into heat energy on the closed-loop heating element 61 to ignite the fuse in the bird repellent bomb 60. After the fuse burns continuously for a period of time, it detonates the explosive in the bird repellent bomb 60. The magnetic field generating unit 40 and the bird repellent bomb 60 with the closed-loop heating element 61 cooperate with each other, and can achieve non-contact electromagnetic ignition in an extremely short time, improving the operating efficiency of the bird repellent gun system. In a preferred embodiment, the magnetic field generating unit 40 includes a series-resonant high-frequency inverter circuit. When the bird repellent bomb 60 is located in the ignition magnetic field, its closed-loop heating element 61 is located at the load end of the inverter circuit. The inverter circuit can be equivalent to a voltage source. When the closed-loop heating element 61 short-circuited at its load end, the inverter circuit will output a very large instantaneous power, thereby instantly increasing the temperature of the closed-loop heating element 61 to achieve instantaneous ignition of the bird repellent bomb 60. This is completely different from the conventional high-frequency induction heating that generates eddy currents inside the magnetic conductor to heat. The cooperation between the closed-loop heating element 61 and the magnetic field generating unit 40 can better achieve the purpose of instantaneous ignition. Because the speed of the bird repellent bomb 60 is extremely fast, and under the action of the huge short-circuit current circulation of the closed-loop heating element 61, its temperature rises sharply. After quickly reaching the ignition point of the fuse, this closed-loop heating element 61 will be burned out, so that the inverter circuit will exit the state of short-circuit at the load end. This process only lasts for a few milliseconds, so it is completely tolerable for the inverter circuit and will not affect the normal operation and service life of the inverter circuit.

[0048] For further optimization of the closed-loop heating element 61, the closed-loop heating element 61 is a circular ring-shaped heating sheet. Refer to Figure 6 , when the bird repellent bomb 60 is located in the missile body movement channel 13, its axis direction is collinear with the axial direction of the launch tube 10. The circular ring-shaped structure is the shape most sensitive to the electromagnetic induction phenomenon. Moreover, on the basis of ensuring the closed-loop structure, the circular ring-shaped structure can not only ensure the largest electromagnetic induction end face area, but also ensure the smallest ignitable volume. The smaller the ignitable volume, the faster the temperature rises and the higher the maximum temperature reached. And the circular ring-shaped heating sheet has a small volume and is basically completely shattered after the bird repellent bomb 60 explodes, leaving no obvious solid residues. Because there is an optimal angle between the axis direction of the circular ring-shaped heating sheet and the direction of the magnetic induction lines of the ignition magnetic field, so refer toFigure 5 , the bird repellent projectile 60 can be a cylindrical bird repellent projectile 60. The circular ring-shaped heating sheet is arranged inside the bird repellent projectile 60, and its axial direction is collinear with the axial direction of the bird repellent projectile 60. When the bird repellent projectile 60 moves in the projectile body movement channel 13, its axial direction is also collinear with the axial direction of the projectile body movement channel 13. In this way, it can be ensured that when the circular ring-shaped heating sheet passes through the ignition magnetic field, its axial direction is collinear with the axial direction of the launch tube 10 (optimal angle). At the same time, considering the geometric advantages of the circular ring compared with other shapes (a circle with the same perimeter has the largest area), this can make the magnetic induction lines of the alternating magnetic field passing through the circular ring-shaped heating sheet the most, and the circular ring-shaped heating sheet can be heated up fastest by induction, so as to achieve the best instantaneous ignition efficiency.

[0049] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the relevant parts, reference can be made to the partial description of the method embodiment.

[0050] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. Bird repelling cannon, wherein, The bird repellent shell has an electromagnetic induction fuse, and is characterized in that the bird repellent gun comprises: A launch tube, which is internally provided with a projectile movement channel, and the projectile movement channel communicates with the outside through the outlet end of the launch tube; A launch device, which can drive the bird repellent shell located in the projectile movement channel to move along the axial direction of the launch tube, so as to be launched to the outside through the outlet end; An electric energy storage unit, which can be externally connected to a power supply to store electric energy; and A magnetic field generating unit, which is arranged outside the launch tube and connected to the electric energy storage unit. The electric energy storage unit provides the stored electric energy to the magnetic field generating unit, so that the magnetic field generating unit generates an ignition magnetic field in the projectile movement channel. The electromagnetic induction fuse of the bird repellent shell passing through the ignition magnetic field can be instantaneously ignited, the bird repellent shell is ejected from the outlet end, and the electromagnetic induction fuse ignites the fuse inside the bird repellent shell; The magnetic field generating unit has a series resonance high-frequency inverter circuit, which can generate a high-frequency alternating electromagnetic field to form the ignition magnetic field; The magnetic field generating unit is arranged outside the outlet end, and can form an ignition magnetic field in the projectile movement channel at the outlet end, so that the electromagnetic induction fuse of the bird repellent shell is ignited when the bird repellent shell passes through the outlet end; The launch tube is further provided with an air inlet communicating with the projectile movement channel; The launch device is a gas supply assembly, which can supply compressed gas to the projectile movement channel through the air inlet to drive the bird repellent shell to move along the launch tube.

2. The bird repellent gun according to claim 1, characterized in that The electric energy storage unit has an energy storage capacitor.

3. The bird repellent gun according to claim 1, characterized in that The bird repellent gun further comprises a control unit, which issues a release signal when the launch device starts to drive the bird repellent shell; The electric energy storage unit releases the stored electric energy to the magnetic field generating unit after receiving the release signal.

4. The bird repellent gun according to claim 1, characterized in that The bird repellent gun further comprises a photoelectric sensor arranged in the projectile movement channel. On the launch stroke of the bird repellent shell, the photoelectric sensor is arranged before the magnetic field generating unit, and the photoelectric sensor outputs a control signal after sensing the bird repellent shell; The electric energy storage unit releases the stored electric energy to the magnetic field generating unit after receiving the control signal.

5. The bird repellent gun according to claim 1, characterized in that The caliber of the projectile movement channel near the outlet end is larger than that of the projectile movement channel at other positions.

6. A bird repelling cannon system, comprising the bird repelling cannon according to any one of claims 1-5, characterized in that, It further comprises: A bird repellent shell, which is equipped with a closed-loop heating element. The closed-loop heating element passing through the ignition magnetic field in the projectile movement channel will form a closed-loop short-circuit current to convert electromagnetic energy into heat energy to ignite the bird repellent shell.

7. The bird repellent gun system according to claim 6, characterized in that The closed-loop heating element is a circular heating sheet. When the bird repellent shell is located in the projectile movement channel, its axis direction is collinear with the axial direction of the launch tube.

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