Drone-mounted speaker call system

Abstract

To provide a system that can significantly reduce noise from a rotary wing of a drone when calling by the sound from a speaker mounted on the drone and makes the sound from the speaker easier to hear on the ground.SOLUTION: A system comprises: a separation support member which supports a speaker at a predetermined distance below a drone body part; and a drone separation-mounted part which includes a speaker, a power supply and a wireless device for receiving sound signals or sound data from the outside. The separation support member supports the drone separation-mounted part at a predetermined distance below the drone body part. The speaker outputs sound on the basis of the sound signal or sound data received by the wireless device. The drone body part may also include an electrically powered winch capable of taking up the separation support member consisting of a rope or cable to which the speaker is attached at the lower end.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a system for outputting sound using a speaker mounted on a drone. [Background technology]

[0002] Conventionally, a system has been known in which a drone equipped with a speaker is flown over a target area such as a mountain, and a voice is output from the speaker mounted on the drone in the air to call out to the missing person in order to search for the person who has gone missing while picking wild vegetables in the target area.

[0003] Patent Document 1 discloses an evacuation guidance drone that is equipped with a drone body, a drone-side transceiver that receives audio transmitted from the operator-side transceiver held by the operator who controls the drone body or an assistant who is mainly responsible for evacuation guidance, and a speaker mounted directly below the drone body that amplifies and disperses the audio output from the drone-side transceiver, and that can provide evacuation guidance from the operator-side transceiver. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-024488 Summary of the Invention [Problem to be solved by the invention]

[0005] The speakers and other mounted equipment are generally mounted on the drone itself. Generally, the sound of a drone's rotors is very loud and creates a lot of noise. Therefore, if a speaker is mounted directly below the drone's body and used to make calls, the problem arises that the sound from the speaker is very difficult to hear from the ground due to the noise of the drone's rotors. [Means for solving the problem]

[0006] A system according to one aspect of the present invention is a system for making calls using a speaker mounted on a drone. The system includes a drone remote mounting unit having the speaker, a power source, and a wireless device for receiving audio signals or audio data from an external device, and a remote support member for supporting the drone remote mounting unit at a predetermined distance below the drone main body. The speaker outputs audio based on the audio signal or audio data received by the wireless device.

[0007] In the system, the drone main body may be equipped with an electric winch capable of winding up a spacing support member consisting of a string or cable with the speaker attached to its lower end, and the separation distance between the drone main body and the speaker may be changed by controlling the winding up of the spacing support member by the winch.

[0008] In the system, a drone remote mounting unit attached to a lower end of the spacing support member that can be wound up by the winch may include the speaker, a power source, and a wireless device that transmits and receives audio signals or audio data from an external device, and the speaker outputs audio based on the audio signal or audio data received by the wireless device. The drone main body may also include a winch control wireless device that receives a winch control signal from an external device and controls the winding of the spacing support member by the winch based on the winch control signal, and a drone flight control wireless device that receives a flight control signal from an external device and controls the flight of the drone based on the flight control signal.

[0009] In the system, a drone remote mounting unit attached to a lower end of the spacing support member that can be wound up by the winch may include the speaker, a power source, and a short-range wireless device that transmits and receives audio signals or audio data to and from the drone main body, and the speaker may output audio based on the audio signals or audio data received by the short-range wireless device. The drone main body may also include a portable wireless device that wirelessly communicates with a pilot-side portable wireless device via a mobile communication network, a short-range wireless device that wirelessly communicates with the drone remote mounting unit, and a control unit that controls flight of the drone based on a flight control signal received from the pilot-side portable wireless device, controls winding of the spacing support member by the winch based on a winch control signal received from the pilot-side portable wireless device, and controls the audio signals or audio data received from the pilot-side portable wireless device to be transmitted to the drone remote mounting unit via the short-range wireless device.

[0010] In the system, the drone main body may be equipped with a Wi-Fi (registered trademark) wireless device or a special wireless device as a wireless device for transmitting and receiving flight control signals, audio signals or audio data, and winch control signals to and from an external device.

[0011] In the system, the drone main body may be equipped with a portable wireless device that communicates via a mobile communication network as a wireless device for transmitting and receiving flight control signals, audio signals or audio data, and winch control signals to and from an external device.

[0012] In the system, the drone main body may be equipped with a Wi-Fi (registered trademark) wireless device or a special wireless device as a wireless device for transmitting and receiving flight control signals and winch control signals to and from an external device, and may be equipped with a portable wireless device that communicates via a mobile communication network as a wireless device for transmitting and receiving audio signals or audio data to and from an external device.

[0013] In the system, the drone main body may include a drone control wireless device that receives flight control signals, a wireless device that receives audio signals and transmits audio signals or audio data to the drone remote mounting unit (hereinafter, wireless device A), and a wireless device that transmits the audio signals or audio data received by the wireless device to the drone remote mounting unit (hereinafter, wireless device B).The remote mounting unit may also include a speaker, a power source, and a wireless device (hereinafter, wireless device C) that receives the audio signals or audio data transmitted from wireless device B of the drone main body, and the speaker may output audio based on the audio signals or audio data received by wireless device C.

[0014] In the system, the separation distance between the drone main body and the speaker may be appropriately set by controlling the winding up of the separation support member by the winch. The electric winch may be wound up or extended by a winch control device mounted on the drone main body. The winch control device may be wound up or extended by an external wireless device (hereinafter referred to as a winch control wireless device) mounted on the drone main body. The winch control wireless device may be incorporated into a drone control wireless device.

[0015] The system may include a drone control device that transmits flight control signals to the drone main body, and an external wireless device for audio input that transmits audio signals or audio data to the drone remote mounting unit.

[0016] The system may include a drone control device that transmits a flight control signal to the drone main body, an external wireless device for winch control that transmits a winch control signal to the drone main body, and an external wireless device for audio input that transmits an audio signal or audio data to the drone remote mounting unit.

[0017] In the system, the spacing support members may be strings, cables, ropes, cords or wires. [Effects of the Invention]

[0018] According to the present invention, the noise from the drone's rotor blades when making a voice call from a speaker mounted on the drone can be significantly reduced, making the voice from the speaker easier to hear on the ground. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a drone-mounted speaker in a call system according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating a configuration example of a drone-mounted speaker according to a reference example. [Figure 3] FIG. 3 is a diagram illustrating an example of the overall configuration of a call system using a drone-mounted speaker according to an embodiment. [Figure 4] FIG. 4 is a diagram illustrating another example of the configuration of the drone-mounted speaker in the call system according to the embodiment. [Figure 5] 5(a) to 5(c) are diagrams showing the effect of suppressing rotor noise by changing the distance between the drone body and the speaker in the call system of FIG. [Figure 6] FIG. 6 is a diagram showing an example of remote operation in the overall configuration of a call system using mobile communication according to a reference example. [Figure 7] FIG. 7 is a diagram illustrating yet another example configuration of the drone-mounted speaker in the call system according to the embodiment. [Figure 8] FIG. 8 is a diagram showing an example of remote operation in the overall configuration of the calling system using the drone-mounted speaker of FIG. [Figure 9] 9(a) and 9(b) are diagrams showing an example of the operation of the call system of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Various embodiments will be described below with reference to the drawings. Note that each drawing merely shows a schematic representation of the shape, size, and positional relationship to the extent that the contents of the present invention can be understood, and therefore the present invention is not limited to the shape, size, and positional relationship exemplified in each drawing. Furthermore, the numerical values ​​exemplified below are merely preferred examples of the present invention, and therefore the present invention is not limited to the exemplified numerical values.

[0021] The system illustrated in this embodiment is a drone-mounted speaker-based calling system that can reduce the noise of the drone's rotors by supporting the speaker at a predetermined distance below the drone's main body rather than mounting the speaker directly on the drone's main body.

[0022] 1 is a diagram showing an example of the configuration of a drone-mounted speaker in a call system according to an embodiment. In FIG. 1, a drone 10 constituting the call system of the embodiment includes a drone main body 12 to which a rotor 11 is attached, and a drone remote mounting unit 14 supported downward from the drone main body 12 at a predetermined distance D by a remote support member 13 such as a string or cable.

[0023] The rotor unit 11 includes one or more rotors for causing the drone 10 to fly, such as ascending into the air, descending from the air, moving in the air, or hovering in the air. For example, the rotor unit 11 may include four or six rotors.

[0024] The drone main body 12 is equipped with a drone flight control radio device 121 that communicates wirelessly with a drone control device (also called a "radio transmitter") operated by a pilot and controls the flight of the drone 10 based on flight control signals received from the drone control device.

[0025] The spacing support member 13 may be a string, a cable, a rope, a cord, or a wire. The spacing distance D provided by the spacing support member 13 is, for example, the difference between the altitude H1 of the lower end of the drone main body 12 and the altitude H2 of the upper end of the drone spacing mount 14. The spacing distance D may be approximately twice the altitude H2 of the drone spacing mount 14 having the speaker 141.

[0026] The drone remote mounting unit 14 includes a speaker 141, a speaker driving unit 142, a wireless device 143, and a power supply (battery) 144. The wireless device 143 performs wireless communication with an external wireless device (external wireless device for audio input), which is an external device, and receives an audio signal or audio data corresponding to the audio output from the speaker 141. The speaker driving unit 142 drives the speaker 141 based on the audio signal or audio data received by the wireless device 143. The reach of the audio output from the speaker 141 is, for example, approximately 100 m.

[0027] According to the drone-mounted speaker calling system of Figure 1, the drone 10 can be flown with the drone main body 12 to which the rotor unit 11 is attached positioned a predetermined distance above the speaker 141 of the drone separation mounting unit 14, thereby reducing the noise N of the drone 10's rotor that reaches the ground G.

[0028] Furthermore, according to the call system of Figure 1, by lowering the speaker 141 by a predetermined distance from the drone main body 12, it is possible to increase the volume of the call voice S output from the speaker 141 and reaching the ground G, making the call voice S easier to hear.

[0029] Furthermore, according to the call system of Figure 1, it is possible to significantly reduce the noise N of the rotor blades of the drone 10 simply by maintaining a separation distance D using a separation support member 13 such as a string or cable.

[0030] On the other hand, as shown in the reference example of Figure 2, when a call is made by mounting a drone standoff mounting unit 14 having a speaker 141 directly below the drone main body 12, the noise N of the drone's rotor blades makes it very difficult to hear the sound S from the speaker on the ground G.

[0031] In addition, the drone main body 12 of the drone 10 in Figure 1 may be equipped with a camera 122 that captures still images or videos (images) of the surrounding area, and a GNSS (e.g., GPS) receiver 123 that receives radio waves from a GNSS (e.g., GPS) satellite to obtain location information of the drone 10.

[0032] Fig. 3 is a diagram showing an example of the overall configuration of a call system using a drone-mounted speaker according to an embodiment. The call system in Fig. 3 includes the drone 10 in Fig. 1, a drone control device 20 operated by a pilot who pilots the drone 10, and an external wireless device for audio input 30. The drone control device 20 and the external wireless device for audio input 30 are each an example of an external device. The drone control device 20 and the external wireless device for audio input 30 may be configured as multiple individual devices or as a single common device.

[0033] The drone control device 20 communicates wirelessly with the drone main body 12 of the drone 10 using a predetermined wireless communication method, and can transmit flight control signals to the drone main body 12 and receive telemetry information from the drone main body 12. The telemetry information includes, for example, information about camera images captured by the drone 10, location information about the drone 10, and aircraft information indicating the status of the drone 10. The wireless communication method between the drone control device 20 and the drone 10 can be, for example, a drone wireless communication method using radio waves in the 2.4 GHz band, a cellular wireless communication method for a mobile communication system, or a short-range wireless communication method such as a wireless LAN (e.g., Wi-Fi (registered trademark)). Alternatively, the wireless communication method between the drone control device 20 and the drone 10 can be a special wireless communication method using a specific low-power radio station for telemetry or telecontrol in the 920 MHz band.

[0034] The external wireless device for voice input 30 performs wireless communication with the drone remote mounting unit 14 of the drone 10 using a predetermined wireless communication method, and transmits the voice signal or voice data of the call voice input from the microphone 31 to the drone remote mounting unit 14. The wireless communication method between the external wireless device for voice input 30 and the drone remote mounting unit 14 can be, for example, a wireless communication method for drones using radio waves in the 2.4 GHz band, a cellular wireless communication method of a mobile communication system, or a short-range wireless communication method such as wireless LAN (for example, Wi-Fi (registered trademark)). The wireless communication method between the external wireless device for voice input 30 and the drone remote mounting unit 14 may also be the special wireless communication method described above.

[0035] 3, the drone flight control radio device 121 of the drone main body 12 may function as a portable radio device that transmits and receives flight control signals to and from the drone control device (external device) 20 via a mobile communication network using the cellular radio communication method of the mobile communication system. Also, the radio device 143 of the drone remote mounting unit 14 may be a portable radio device that transmits and receives voice signals or voice data to and from the voice input external radio device (external device) 30 via a mobile communication network using the cellular radio communication method of the mobile communication system.

[0036] 3, the drone flight control wireless device 121 of the drone main body 12 may function as a Wi-Fi wireless device that transmits and receives flight control signals to and from the drone control device (external device) 20 via Wi-Fi wireless communication, or as a special wireless device that transmits and receives flight control signals via the aforementioned special wireless communication method.The wireless device 143 of the drone remote mounting unit 14 may function as a Wi-Fi wireless device that transmits and receives audio signals or audio data to and from the audio input external wireless device (external device) 30 via Wi-Fi wireless communication, or as a special wireless device that transmits and receives audio signals or audio data via the aforementioned special wireless communication method.

[0037] Furthermore, in the call system of Figure 3, the drone flight control radio device 121 of the drone main body 12 has the function of a Wi-Fi radio device that transmits and receives flight control signals to and from the drone control device (external device) 20 using a Wi-Fi radio communication method, or a special radio device that transmits and receives flight control signals using the above-mentioned special radio communication method, and the radio device 143 of the drone standoff mounting unit 14 may be a portable radio device that transmits and receives voice signals or voice data to and from the voice input external radio device (external device) 30 via a mobile communication network using a cellular radio communication method of a mobile communication system.

[0038] Fig. 4 is a diagram showing another example of the configuration of a drone-mounted speaker in the call system according to the embodiment. The example in Fig. 4 is a configuration example in which the separation distance D between the drone main body 12 and the drone separation mounting unit 14 (speaker 141) is variable. In Fig. 4, parts that are common to Fig. 1 are given the same reference numerals, and descriptions thereof will be omitted.

[0039] 4, the drone main body 12 includes an electric winch 15 that can wind the spacing support member 13 from a string or cable onto an electric reel, and a winch control wireless device 124 that controls the winding of the winch 15 based on a winch control signal received from an external winch control wireless device. The external winch control wireless device is an example of an external device. By remotely controlling the winding (winding amount) of the spacing support member 13 by the winch 15 from the external winch control wireless device via the winch control wireless device 124, the drone spacing mount 14 (speaker 141) can be lowered or raised, thereby changing the separation distance D between the drone main body 12 and the drone spacing mount 14 (speaker 141).

[0040] The wireless communication method between the winch control wireless device 124 of the drone 10 and the external winch control wireless device may be, for example, a drone wireless communication method using radio waves in the 2.4 GHz band, a cellular wireless communication method of a mobile communication system, or a short-range wireless communication method such as wireless LAN (e.g., Wi-Fi (registered trademark)). The wireless communication method between the external winch control wireless device and the winch control wireless device 124 may be the special wireless communication method described above. Furthermore, the external winch control wireless device may be configured as an individual device separate from the drone control device and the external wireless device for voice input, or may be configured as a single common device integrated with either or both of the drone control device and the external wireless device for voice input.

[0041] In addition, the drone main body 12 of the drone 10 in Figure 4 may be equipped with a camera 122 that captures still images or videos (images) of the surrounding area, and a GNSS (e.g., GPS) receiver 123 that receives radio waves from a GNSS (e.g., GPS) satellite to obtain location information of the drone 10.

[0042] According to the call system equipped with the winch 15 of Figure 4, the noise N of the rotor blades of the drone 10 can be reduced simply by maintaining a separation distance D using a separation support member 13 such as a string or cable.

[0043] In particular, according to the call system equipped with the winch 15 of Figure 4, the separation distance D between the drone main body 12 and the drone separation mounting unit 14 (speaker 141) can be varied, so that the separation distance D can be adjusted according to the flight altitude of the drone 10, and the noise N of the drone's 10 rotor blades can be appropriately controlled.

[0044] For example, as shown in Figure 5(a), the drone 10 is flown to the location where the call is to be made with the separation distance D set to 0 for safety reasons. After arriving at the location where the call is to be made, as shown in Figure 5(b), the winch 15 is controlled to lower the drone separation mounting unit 14 (speaker 141), and the call system is operated with the separation distance D. This reduces the noise N of the drone's rotors that reaches the ground G, making it possible to hear the call voice.

[0045] Furthermore, in locations susceptible to the noise N of the drone 10's rotor blades, as shown in Figure 5(c), the drone main body 12 is raised and the winch 15 is controlled to lower the drone separation mounting unit 14 (speaker 141), thereby operating the call system with an even greater separation distance D. This further reduces the noise N of the drone 10's rotor blades that reaches the ground G, making the call voice easier to hear.

[0046] Furthermore, according to the call system equipped with the winch 15 of Figure 4, the separation distance D can be made variable, so that when the speaker shakes significantly during strong winds, etc., it is possible to shorten the separation distance D between the drone main body 12 and the drone separation mounting unit 14 (speaker 141) to ensure safety.

[0047] [Remote operation] When the calling system of the embodiment illustrated in Figures 1 to 5 is operated remotely via mobile communication, the drone main body 12 of the drone and the drone separation mounting unit 14 equipped with a speaker 141, etc. are separated from each other, so it is necessary to remotely control each of the drone main body 12 and the drone separation mounting unit 14 via wireless communication, for example, mobile communication.

[0048] Fig. 6 is a diagram showing an example of remote operation in the overall configuration of a call system using mobile communication according to a reference example. In the call system of Fig. 6, the drone main body 12 and the drone remote mounting unit 14 of the drone 10 are equipped with mobile wireless devices (e.g., mobile communication modules) 125 and 145, respectively, and the drone control device 20 is equipped with a mobile wireless device (e.g., mobile communication module) 211. An operator can remotely control the drone flight control 101 (including acquisition of telemetry information), acquisition of camera video 202, or winch control 203 of the drone main body 12 of the drone 10 via mobile communication between the mobile wireless device 211 and the mobile wireless device 125 by operating the drone flight control 201 (including acquisition of telemetry information), displaying camera video 202, or operating winch control 203 on the drone control device 20. In addition, by operating the voice input 204 of the call voice from the microphone on the drone control device 20, the operator can remotely control the output of the call voice from the speaker 141 in the drone standoff mounting unit 14 of the drone 10 via mobile communication between the mobile wireless device 211 and the mobile wireless device 145.

[0049] The reference example call system of Figure 6 has the problem that a wireless device such as a portable wireless device is required for each of the drone main body 12 and the drone remote mounting unit 14 of the drone 10, that is, at least two wireless devices such as a portable wireless device are required.

[0050] Fig. 7 is a diagram showing yet another example configuration of a drone-mounted speaker in a calling system according to an embodiment. The example in Fig. 7 is a configuration example in which wireless communication between the drone main body 12 and the drone remote mounting unit 14 is achieved by a short-range wireless communication method such as wireless LAN (e.g., Wi-Fi (registered trademark)), and mobile communication with the drone control device 20 is achieved by a single mobile wireless device 126. Note that in Fig. 7, parts that are common to the above-mentioned Figs. 1 and 4 are assigned the same reference numerals, and descriptions thereof will be omitted.

[0051] In FIG. 7, the drone main body 12 of the drone 10 includes a portable wireless device (e.g., a portable communication module) 126 for performing portable communication with the drone control device, a Wi-Fi wireless device (e.g., a Wi-Fi communication module) 127 as a short-range wireless communication device for performing short-range wireless communication with the drone remote mounting unit 14, a drone flight control device 128, and a winch control device 129. The Wi-Fi wireless device 127 receives an audio signal or audio data from the drone control device via the portable wireless device 126 and transmits it to the drone remote mounting unit 14 via the Wi-Fi wireless communication method. The drone flight control device 128 controls the flight of the drone 10 based on a drone flight control signal received from the drone control device via the portable wireless device 126. The drone flight control device 128 also transmits telemetry information to the drone control device via the portable wireless device 126. The winch control device 129 controls the winding of the winch 15 based on the winch control signal received from the drone control device via the portable wireless device 126.

[0052] 7, the drone remote mounting unit 14 of the drone 10 includes a Wi-Fi wireless device (e.g., a Wi-Fi communication module) 146 as a short-range wireless communication device that performs short-range wireless communication with the drone main body 12. The Wi-Fi wireless device 146 receives an audio signal or audio data transmitted from the drone main body 12 by the Wi-Fi wireless communication method, and passes it to the speaker driving unit 142. Note that the short-range wireless communication device that performs short-range wireless communication with the drone main body 12 may be the special wireless device described above.

[0053] Figure 8 is a diagram showing an example of remote operation in the overall configuration of the call system using the drone-mounted speaker of Figure 7. In Figure 8, an operator can remotely control drone flight control 101 (including acquisition of telemetry information), acquisition of camera video 202, or winch control 203 in the drone main body 12 of the drone 10 via mobile communication between the mobile wireless device 211 and the mobile wireless device 126 by operating drone flight control 201 (including acquisition of telemetry information), display of camera video 202, or winch control 203 on the drone control device 20. In addition, by operating voice input 204 of a call voice from the microphone on the drone control device 20, the operator can remotely control the output of the call voice from the speaker 141 in the drone remote mounting unit 14(1) of the drone 10 via mobile communication between the mobile wireless device 211 and the mobile wireless device 126 and short-range wireless communication between the Wi-Fi wireless devices 127 and 146. Even when the drone 10 has multiple drone separation mounting units 14(1), 14(2), the output of the call voice from the speaker 141 in the drone separation mounting units 14(1), 14(2) can be remotely controlled.

[0054] 7 and 8, wireless communication is achieved between the drone main body 12 and the drone remote control mount 14 using short-range wireless such as Wi-Fi. In addition, a portable wireless device 126 is installed in the drone main body 12, and communication with the drone remote control mount 14 is performed via the portable wireless device 126 installed in the drone main body 12 and short-range wireless communication.

[0055] 7 and 8, communication between the drone main body 12, the drone remote control mount 14, and the drone control device 20 can be achieved using a single portable wireless device 126. Short-range wireless communication such as Wi-Fi between the portable wireless device 126 of the drone main body 12 and the drone remote control mount 14 can also be performed using Wi-Fi if it is installed in the portable wireless device 126 of the drone main body 12, using a tethering function.

[0056] Furthermore, according to the call system of Figures 7 and 8, the drone main body 12 and the drone remote mounting unit 14 are in a line-of-sight environment, so the communication quality of short-range wireless communication such as Wi-Fi is good.

[0057] Furthermore, according to the call system of Figure 8, even if there are multiple drone separation mounting units 14(1), 14(2), just as in the case of a single drone separation mounting unit 14, it is possible to remotely control the audio output of each of the multiple drone separation mounting units 14(1), 14(2) and remotely control the operation of the winch 15 for adjusting the separation distance D via a single portable wireless device 126 of the drone main body 12.

[0058] Figures 9(a) and 9(b) are diagrams showing an example of operation of the call system in Figure 7. As shown in Figure 9(a), from the perspective of ensuring safety, the drone 10 is flown to the location where the call is to be made, with the separation distance D set to 0. After arriving at the location where the call is to be made, the drone separation mounting unit 14 (speaker 141) is lowered by controlling the winch 15, as shown in Figure 9(b), and the call system is operated with the separation distance D maintained.

[0059] 9(b), increasing the flight altitude of the drone 10 may improve the quality of mobile communication by providing line-of-sight with the mobile base station. In such a case, in order to maintain a constant volume of the call voice output from the speaker 141 and reaching the ground G, the flight altitude of the drone may be increased by adjusting the separation distance D so as to maintain a constant altitude of the speaker 141.

[0060] In addition, in the calling system of Figures 7 to 9, the drone main body 12 may be equipped with a Wi-Fi wireless device that transmits and receives flight control signals, voice signals or voice data, and winch control signals to and from the drone control device (external device) 20 via a Wi-Fi wireless communication method, instead of the portable wireless device 126, or a special wireless device that transmits and receives flight control signals, voice signals or voice data, and winch control signals via the above-mentioned special wireless communication method.

[0061] In addition, in the call system of Figures 7 to 9, the drone main body 12 is equipped with a Wi-Fi wireless device that transmits and receives flight control signals and winch control signals to and from the drone control device (external device) 20 using a Wi-Fi wireless communication method, or a special wireless device that transmits and receives flight control signals and winch control signals using the above-mentioned special wireless communication method, and may transmit and receive audio signals or audio data to and from the drone control device (external device) 20 using the above-mentioned portable wireless device 126.

[0062] As described above, according to this embodiment, it is possible to call out to targets such as workers picking wild vegetables in a target area such as a mountain or missing people who have been lost in distress using an easy-to-listen voice.

[0063] Furthermore, the present invention can provide a calling system that can call out to people in easy-to-listen voices, such as workers picking wild vegetables in target areas such as mountains, or people who are lost and missing, thereby contributing to the achievement of Goal 9 of the Sustainable Development Goals (SDGs), which is to "build resilient infrastructure, promote inclusive and sustainable industrialization, and promote innovation and resilience."

[0064] It should be noted that the process steps and system components described herein may be implemented by various means, for example, these steps and components may be implemented in hardware, firmware, software, or a combination thereof.

[0065] For hardware implementation, the processing units and other means used to implement the above steps and components in an entity (e.g., various wireless communication devices, Node Bs, terminals, hard disk drive devices, or optical disk drive devices) may be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processors (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, computers, or combinations thereof.

[0066] Furthermore, with regard to firmware and / or software implementations, the means, such as a processing unit, used to realize the above components may be implemented with a program (e.g., code, such as procedures, functions, modules, instructions, etc.) that performs the functions described herein. In general, any computer / processor-readable medium tangibly embodying firmware and / or software code may be used to implement the means, such as a processing unit, used to realize the above steps and components described herein. For example, the firmware and / or software code may be stored in a memory and executed by a computer or processor, such as in a controller. The memory may be implemented within the computer or processor or external to the processor. Furthermore, the firmware and / or software code may be stored in a computer- or processor-readable medium, such as random access memory (RAM), read-only memory (ROM), non-volatile random access memory (NVRAM), programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), flash memory, floppy disk, compact disk (CD), digital versatile disk (DVD), magnetic or optical data storage device, etc. The code may be executed by one or more computers or processors and may cause the computers or processors to perform certain aspects of the functionality described herein.

[0067] The medium may be a non-transitory recording medium. The program code may be in any format as long as it can be read and executed by a computer, processor, or other device or machine. For example, the program code may be in any of source code, object code, and binary code, or may be a mixture of two or more of these codes.

[0068] Moreover, the description of the embodiments disclosed herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. [Explanation of symbols]

[0069] 10: Drone 11: Rotor section 12: Drone body 13: Separate support member 14: Drone standoff mounting unit 15: Winch 20: Drone control device 21: Drone body 30: External wireless device for audio input 31:Mike 121: Drone flight control radio equipment 122: Camera 123: GNSS (GPS) receiver 124: Winch control radio device 125: Portable radio equipment 126: Portable radio equipment 127 :Wi-Fi wireless equipment 128: Drone flight control device 129: Winch control device 141: Speaker 142: Speaker driver 143: Radio equipment 144: Power supply (battery) 145: Portable radio equipment 146 :Wi-Fi wireless equipment D: Separation distance N: Noise S: Audio

Claims

1. A drone-mounted speaker calling system that makes voice calls from the sky to a target area on the ground using a speaker mounted on a drone, A drone body, a drone standoff mounting unit having the speaker, a power source, and a wireless device that receives a voice signal or voice data of a call voice from an external device; a distance support member that supports the drone distance mounting unit at a predetermined distance downward from the drone main body, The speaker includes: The drone is attached to the lower end of the standoff mounting unit so that the output direction of the call voice is downward, a call voice generated based on the voice signal or voice data received by the wireless device is output downward toward the target area on the ground from a predetermined altitude above the drone body unit, the call voice being generated based on the voice signal or voice data received by the wireless device, the call voice being generated from the drone body unit and the drone separation mounting unit being lowered a predetermined distance below the drone body unit; The drone body is provided with an electric winch capable of winding up a separation support member made of a string or cable to which the speaker is attached at a lower end, changing a separation distance between the drone body and the speaker by controlling winding up of the separation support member by the winch; a drone remote mounting unit attached to a lower end of the remote support member that can be wound up by the winch, the drone remote mounting unit including the speaker, a power source, and a short-range wireless device that transmits and receives audio signals or audio data to and from the drone main body; the speaker outputs a sound based on an audio signal or audio data received by the short-range wireless device; The drone main body includes: a portable wireless device that wirelessly communicates with a portable wireless device on the pilot's side via a base station of a portable communication network; a short-range wireless device that wirelessly communicates with the drone remote mounting unit; a control unit that controls the flight of the drone based on a flight control signal received from the pilot-side portable wireless device, controls the winding up of the separation support member by the winch based on a winch control signal received from the pilot-side portable wireless device, and controls the transmission of an audio signal or audio data received from the pilot-side portable wireless device to the drone separation mounting unit via the short-range wireless device, The control unit of the drone main body is A mobile radio signal including a flight control signal for controlling the flight of the drone, a control signal for adjusting the distance of the speaker from the drone main body, and an audio signal or audio data of a call voice to be output from the speaker is received from the mobile radio device of the pilot via a base station of the mobile communication network; Based on the flight control signal included in the mobile wireless signal, the drone with the short separation distance is flown toward the sky above the site where the voice call will be made, and when the drone reaches the sky above the site, the flight of the drone is controlled so that the drone main body rises to a predetermined altitude where there is line of sight between the mobile wireless device of the drone main body and a base station of the mobile communication network; When the drone body is raised to a predetermined altitude above the site where the drone has line-of-sight with a base station of the mobile communication network, the speaker is lowered to separate from the drone body that has risen to the predetermined altitude based on a control signal for adjusting the separation distance included in the mobile wireless signal, and the driving of the separation support member is controlled so that the volume of the call voice that reaches the site from the speaker is constant; Controlling the mobile radio signal so that the voice signal or voice data of the call voice is transmitted to the drone remote mounting unit via the short-range wireless device; The speaker, together with the drone separation mounting unit, descends a predetermined distance below the drone main body unit from above a predetermined altitude, and outputs a call voice generated based on the voice signal or voice data received from the drone main body unit by the short-range wireless device downward toward the target area on the ground. A calling system using a drone-mounted speaker.

2. In the call system using the drone-mounted speaker of claim 1, a means for adjusting the separation distance so as to keep the altitude of the speaker constant when the altitude of the drone body is changed; A calling system using a drone-mounted speaker.

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