Megaphone suitable for being mounted on unmanned aerial vehicle

Abstract

The utility model provides a megaphone suitable for being mounted on an unmanned aerial vehicle. The megaphone comprises an unmanned aerial vehicle mounting connecting piece and a mounting box body. An ultrasonic transducer area array is arranged on the outer side face of the mounting box body, an ultrasonic transducer driving circuit is arranged in the mounting box body, and an unmanned aerial vehicle interface is formed in the top of the mounting box body; the ultrasonic transducer driving circuit and the ultrasonic transducer can modulate an audio signal of the unmanned aerial vehicle to an ultrasonic frequency spectrum for transmission, and after the ultrasonic wave interacts with a person or an object, the ultrasonic wave can be automatically demodulated into human voice which can be heard by human ears. According to the megaphone, the ultrasonic transducer is used for replacing a common loudspeaker to produce sound, the ultrasonic directivity is good, a sound amplification port is not needed to collect sound, a phase control mode is used for controlling the sound direction, and a pitching holder is not needed to control the sound angle, so that the overall weight is greatly reduced, and the control agility of the unmanned aerial vehicle and the endurance of the unmanned aerial vehicle are improved; meanwhile, the megaphone does not need to produce sound based on an alternating magnetic field, so that interference to detection and control of the attitude and position of the unmanned aerial vehicle is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle equipment, and in particular to a loudspeaker suitable for mounting on a unmanned aerial vehicle. Background Art

[0002] The existing drone loudspeaker uses a speaker driving circuit to drive the sound unit (usually a magnetic speaker or a non-magnetic speaker) to emit sound. The sound is transmitted in a specified direction through a conical sound expansion port, and the pitch angle of the sound direction is controlled by controlling the pitch platform. The device structure is shown in the attached figure. Figure 1 As shown. Existing drone loudspeakers have the following defects:

[0003] (1) Heavy weight: ① In order to make the sound loud enough, a high-power drive circuit and speaker are required. The greater the power, the greater the weight. The weight of the drive circuit and speaker affects the control agility and endurance of the drone. ② In order to make the sound have good directionality, a long sound expansion port is required. The weight of the sound expansion port affects the control agility and endurance of the drone. ③ In order to make the directionality of the sound controllable, a pitch gimbal is required. The weight of the pitch gimbal affects the control agility and endurance of the drone.

[0004] (2) Interference with the control accuracy and flight safety of drones: ① Most speakers contain magnetic components, and their magnetic fields will affect the position and attitude detection and control of drones, especially the horizontal direction detection and control of drones, thereby affecting flight safety; ② Even if non-magnetic speakers are used, they will still generate alternating electromagnetic fields when making sounds, which will also affect the position and attitude detection and control of drones, thereby affecting flight safety. Utility Model Content

[0005] The purpose of this utility model is to provide a megaphone suitable for mounting on drones, so as to solve the problems that existing drone megaphones are heavy, affecting the control agility and flight endurance of drones, and that magnetic fields interfere with drone control accuracy and flight safety. The specific technical solutions of this utility model are as follows:

[0006] A loudspeaker suitable for drone mounting, the loudspeaker comprising a drone mounting connector and a mounting box below the mounting box; the mounting box comprising an ultrasonic transducer panel, an ultrasonic transducer drive circuit, and a drone interface; one side of the mounting box being a downwardly inclined surface; the ultrasonic transducer panel being arranged on the inclined surface; the ultrasonic transducer drive circuit being arranged inside the mounting box; and the drone interface being arranged on the top of the mounting box.

[0007] Furthermore, a plurality of ultrasonic transducers are provided on the ultrasonic transducer panel, and the plurality of ultrasonic transducers form an ultrasonic transducer array.

[0008] Furthermore, the ultrasonic transducer driving circuit includes an audio ultrasonic modulation circuit and a multi-channel phase shift circuit.

[0009] Furthermore, the input end of the audio ultrasonic modulation circuit is connected to the drone interface, the output end of the audio ultrasonic modulation circuit is connected to the multi-channel phase shift circuit, and the output end of the multi-channel phase shift circuit is respectively connected to multiple ultrasonic transducers.

[0010] Furthermore, the drone mounting connector includes a base plate and a connector. The size of the base plate is the same as the size of the top of the mounting box. The base plate is fixedly connected to the mounting box through a nut assembly.

[0011] Furthermore, the connecting member is a support leg provided on the edge of the base plate, the lower end of the support leg is fixedly connected to the base plate, and the upper end of the support leg is fixedly connected to the bottom of the drone fuselage.

[0012] Furthermore, there are multiple wire threading holes in the middle of the bottom plate, and the drone interface is electrically connected to the drone through the wire threading holes.

[0013] Furthermore, a support disc is provided in the middle of the bottom plate.

[0014] The utility model provides a megaphone suitable for mounting on a drone, which has the following beneficial effects:

[0015] 1. The utility model provides a loudspeaker suitable for mounting on a drone, which uses ultrasonic waves to transmit audio signals, removes the sound amplification port, the pitch platform and its driving circuit, reduces the weight of the equipment, improves the agility of drone control, and increases the drone's flight time.

[0016] 2. The utility model provides a loudspeaker suitable for mounting on a drone, which uses a sound-generating principle without a magnetic field to avoid magnetic interference in the detection and control of the drone's attitude and position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a megaphone suitable for mounting on a drone provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a mounting box in a megaphone suitable for mounting on a drone provided by the utility model;

[0019] Figure 3This is a schematic diagram of ultrasonic direction control principle in a megaphone suitable for mounting on a drone, provided by the utility model;

[0020] Figure 4 This is a schematic diagram of the installation of a loudspeaker suitable for mounting on a drone and the drone provided by the utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings provided by the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. According to the following description, the advantages and features of the present invention will become more apparent. It should be noted that the drawings are all in a very simplified form and are not in exact proportions. They are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of the present invention, the terms "up", "down", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inside", "outside" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] Example: This example provides a megaphone suitable for drone mounting, see Figure 1 As shown, the loudspeaker includes a drone mounting connector 1 and a mounting box 2 below it. An ultrasonic transducer panel 3 is provided on the external side of the mounting box 2. A plurality of ultrasonic transducers 4 are provided on the ultrasonic transducer panel 3. An ultrasonic transducer driving circuit is provided inside the mounting box 2, and a drone interface is provided on the top of the mounting box 4.

[0025] As a specific embodiment of the drone mounting connector 1, the drone mounting connector 1 includes a base plate 11 and a connector 12. The connector 12 can be arranged around the base plate 11. The size of the base plate 11 is the same as the size of the top of the mounting box 4. The four corners of the base plate 11 are fixedly connected to the mounting box 4 through nut assemblies. The connector 12 can be four legs arranged on the base plate 11 near the four corners. The legs can be vertical "concave" shaped, with their lower ends fixedly connected to the base plate 11 and their upper ends connected to the drone through nut assemblies. A plurality of threading holes are set in the middle of the base plate 11, and the drone interface on the top of the mounting box 4 is freely electrically connected to the drone through the threading holes.

[0026] As a preferred embodiment of the UAV mounting connector 1, a bracket disc 5 is also provided in the middle of the base plate 11. The bracket disc 5 can be used in certain situations where an intermediate electrical conversion component needs to be added to provide a fixed position for the electrical conversion component.

[0027] As a specific embodiment of the mounting box 4, one of the side surfaces of the mounting box 4 is an inclined surface, which faces obliquely downward. That is, the cross-section of the mounting box 4 on one side is equivalent to an inverted right-angled trapezoid. An ultrasonic transducer panel 3 is provided on the inclined surface, and multiple ultrasonic transducers 2 are provided on the ultrasonic transducer panel 3 to form an ultrasonic transducer surface array. The mounting box 4 is internally provided with an ultrasonic transducer drive circuit. Figure 2 As shown, the ultrasonic transducer drive circuit includes an audio ultrasonic modulation circuit and a multi-channel phase shift circuit. The output of the drone interface on the top of the mounting box 4 is connected to the input of the audio ultrasonic modulation circuit, which in turn is connected to the input of the multi-channel phase shift circuit. The output of the multi-channel phase shift circuit is respectively connected to the input of multiple ultrasonic transducers. The audio ultrasonic modulation circuit modulates the drone's audio signal onto an ultrasonic carrier, leveraging the directional propagation characteristics of ultrasonic waves and the nonlinear effects of air to achieve directional propagation of audible sound. The phase shift circuit shifts the phase of the audio input signal, thereby adjusting the audio signal.

[0028] See Figure 3 As shown, the ultrasonic direction control principle of an ultrasonic transducer array is similar to the "binaural effect" or "phased array radar" principle. Each ultrasonic transducer is driven independently, but the phase difference (or "time delay") of the driving signal varies. For people or objects on the ground, the sound can only be clearly heard if their distance from each transducer is such that the phase difference between the driving signals is offset. By controlling the phase difference, the target point of the call can be moved.

[0029] See Figure 4As shown, the loudspeaker is fixedly connected to the bottom of the drone 100 through the drone mounting connector 1. When the drone 100 makes a call, the audio signal is transmitted to the loudspeaker through the drone interface. The ultrasonic transducer drive circuit and the ultrasonic transducer of the loudspeaker modulate the audio signal audible to the human ear into the ultrasonic spectrum. Compared with ordinary sound, ultrasonic waves are not easy to diverge in space and have better directionality. Therefore, they can propagate over a longer distance with less energy attenuation. After the ultrasonic waves interact with people or objects, they are automatically demodulated into human voices audible to the human ear.

[0030] The loudspeaker suitable for drone mounting provided by the utility model modulates the audio signal onto the ultrasonic spectrum for propagation. The ultrasonic wave has good directivity and does not require a loudspeaker to focus the sound. The sound direction is controlled by phase control, and there is no need for a pitch platform to control the angle of the sound. Therefore, the overall weight is greatly reduced, and the agility of drone control and the endurance of the drone are improved. At the same time, there is no need to generate sound based on an alternating magnetic field, so there is no magnetic field interference.

[0031] Those skilled in the art should understand that the present invention can be implemented in many other specific forms without departing from the spirit and scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A megaphone suitable for mounting on a drone, characterized in that: The loudspeaker includes a drone mounting connector and a mounting box below it. The mounting box includes an ultrasonic transducer panel, an ultrasonic transducer drive circuit and a drone interface. One of the side surfaces of the mounting box is a downward inclined surface. The ultrasonic transducer panel is arranged on the inclined surface. The ultrasonic transducer drive circuit is arranged inside the mounting box. The drone interface is arranged on the top of the mounting box.

2. The loudspeaker suitable for mounting on a drone according to claim 1, characterized in that: A plurality of ultrasonic transducers are arranged on the ultrasonic transducer panel, and the plurality of ultrasonic transducers form an ultrasonic transducer array.

3. The megaphone suitable for mounting on a drone according to claim 2, characterized in that: The ultrasonic transducer driving circuit includes an audio ultrasonic modulation circuit and a multi-channel phase shift circuit.

4. The loudspeaker suitable for mounting on a drone according to claim 3, characterized in that: The input end of the audio ultrasonic modulation circuit is connected to the drone interface, the output end of the audio ultrasonic modulation circuit is connected to the multi-channel phase shift circuit, and the output end of the multi-channel phase shift circuit is respectively connected to the plurality of ultrasonic transducers.

5. The loudspeaker suitable for mounting on a drone according to claim 1, characterized in that: The drone mounting connector includes a base plate and a connector. The size of the base plate is the same as the size of the top of the mounting box. The base plate is fixedly connected to the mounting box through a nut assembly.

6. The loudspeaker suitable for mounting on a drone according to claim 5, characterized in that: The connecting member is a support leg arranged on the edge of the base plate, the lower end of the support leg is fixedly connected to the base plate, and the upper end of the support leg is fixedly connected to the bottom of the drone fuselage.

7. The megaphone suitable for mounting on a drone according to claim 5, characterized in that: There are multiple wire threading holes in the middle of the bottom plate, and the drone interface is electrically connected to the drone through the wire threading holes.

8. The megaphone suitable for mounting on a drone according to claim 7, characterized in that: A support disc is also provided in the middle of the bottom plate.

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