Control system and method of integrated shouting and lighting equipment of unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicle mounted equipment control, and discloses a control system and method of an unmanned aerial vehicle integrated shouting and lighting equipment, and the system comprises a main control module, a wireless communication module, an audio processing module, a power amplification module, a lighting unit and a loudspeaker. Establishing a full duplex call link; the main control module is used for controlling the audio processing module and the lighting unit, analyzing a dual-tone multi-frequency signal generated by a user key in the call process in real time and converting the dual-tone multi-frequency signal into a decoding instruction signal, and the main control module controls the audio processing module or the lighting unit according to the instruction signal, so that remote operations such as shouting, two-way call, recording playing, light switching, brightness adjustment and the like are realized. The method solves the problems of tedious control mode, limited communication distance and single control channel of the existing equipment, and has the remarkable advantages of no need of installation and application, capability of carrying out beyond-visual-range two-way conversation and diverse and reliable control modes.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) mounted equipment control technology, specifically a control system and method for integrating UAV loudspeaker and lighting equipment. Background Technology

[0002] In recent years, drones have been widely used in emergency rescue, public safety, and traffic management due to their high maneuverability and flexibility. To enhance their operational capabilities in these scenarios, drones are typically equipped with loudspeakers and lighting devices. However, existing drone loudspeaker and lighting devices still have many shortcomings in terms of control methods, communication capabilities, and operational reliability.

[0003] In terms of control methods, most existing devices require operators to download and install specific applications via smartphones or use dedicated remote controls paired with the device. This approach is not only cumbersome and increases the learning curve for users, but also delays optimal action in emergencies due to the process of finding and launching specific applications or remote controls. Consequently, its universality and convenience are poor.

[0004] Secondly, regarding communication capabilities and control distance, many solutions rely on traditional radio remote control or walkie-talkie signals. Their effective control distance is typically limited to line-of-sight range, failing to meet the needs of large-scale or beyond-line-of-sight operations. Furthermore, their audio functions are mostly one-way broadcasts, meaning remote operators can only speak to the site but cannot receive audio feedback, thus failing to achieve true two-way communication. This one-way communication mode significantly reduces efficiency and accuracy in command scenarios requiring precise understanding of the situation and real-time interaction.

[0005] Furthermore, existing equipment has significant shortcomings in terms of control path redundancy and scenario adaptability. They typically rely on a single remote wireless control path; if this path is interrupted due to signal interference, equipment failure, or exceeding the distance, the mounted equipment (such as lighting) will become uncontrollable, lacking backup control methods. This design fails to provide alternative solutions for direct and reliable control in different application scenarios, such as close-range operation or poor wireless signal conditions, and the overall reliability and environmental adaptability of the system need improvement. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a control system and method for integrating drone loudspeaker and lighting equipment, which solves the problems of cumbersome and inconvenient control methods, limited communication distance and interaction capabilities, and insufficient reliability and scene adaptability caused by the single control path in existing drone loudspeaker and lighting equipment.

[0007] To address the aforementioned technical problems, this invention provides a control system and method for integrating loudspeaker and lighting equipment into unmanned aerial vehicles (UAVs).

[0008] The first aspect of this invention provides a control system for an unmanned aerial vehicle (UAV) integrating a loudspeaker and lighting device, comprising: One main control module; A wireless communication module electrically connected to the main control module, the wireless communication module being used to answer external dialing calls to establish a call link, and to separate downlink audio signals and dual-tone multi-frequency signals generated by pressing the dial keypad of the telephone from the call link; An audio processing module electrically connected to the main control module, the audio processing module being connected to a microphone and a speaker, is used to drive the speaker to emit sound according to the received downlink audio signal, and to collect the live audio from the microphone to generate an uplink audio signal; A lighting unit electrically connected to the main control module, the lighting unit being used to perform a light-emitting operation according to a received lighting control signal; The main control module is configured as follows: Receive the downlink audio signal and the dual-tone multi-frequency signal separated by the wireless communication module; The dual-tone multi-frequency signal is analyzed to generate decoding command signals corresponding to different keyboard keys, and the audio processing module or the lighting unit is controlled according to the decoding command signals. The wireless communication module and the audio processing module work together to establish a two-way call between the remote user in the call link and the ambient environment where the microphone is located.

[0009] In one specific embodiment, the main control module's parsing of the dual-tone multi-frequency (DTMF) signal specifically involves mapping the DTMF signal to a preset instruction set. The decoding instruction signal includes: Lighting control commands for controlling the lighting unit to turn on, off, adjust brightness, and switch to strobe mode; And audio control commands for controlling the audio processing module to perform recording switch operations and adjust the speaker volume.

[0010] The mapping relationship between the instruction set and the dual-tone multi-frequency signal is preset in the main control module, wherein: The first specific dual-tone multi-frequency signal corresponds to the turn-on command of the lighting unit; The second specific dual-tone multi-frequency signal corresponds to the shutdown command of the lighting unit; A set of preset digital dual-tone multi-frequency signals correspond to the adjustment commands for different brightness levels of the lighting unit; The third specific dual-tone multi-frequency signal corresponds to the strobe mode switching command of the lighting unit; The single triggering of the fourth specific dual-tone multi-frequency signal corresponds to the switching of the recording function of the audio processing module on and off. The continuous input of the fifth and sixth specific dual-tone multi-frequency signals corresponds to the increase and decrease commands of the speaker volume, respectively.

[0011] The seventh specific dual-tone multi-frequency signal corresponds to the power-off command for the 4G communication module.

[0012] Preferably, the control system further includes an attitude sensing unit disposed on the lighting unit. Specifically, the attitude sensing unit is a mercury switch, used to generate an attitude signal when the physical attitude of the lighting unit changes relative to the direction of gravity; the main control module is further configured to control the lighting unit to turn on or off based on the attitude signal.

[0013] In one specific embodiment, the processing logic of the attitude signal by the main control module is as follows: When the attitude signal is a first level signal used to characterize the tilting attitude, and the duration reaches a preset duration, a toggle operation is performed on the switching state of the lighting unit. Furthermore, when the attitude signal is a second-level signal used to characterize a non-tilting attitude, and the duration reaches the preset duration, no instruction is triggered, and as a reset of a control cycle, it waits for the next flip operation triggered by the first-level signal.

[0014] Preferably, the control system further includes a local control unit electrically connected to the main control module. The local control unit includes at least one power button, a record / pause button, and a play button; the main control module is further configured to: In response to the operation of the physical button, the lighting unit and the control system are controlled; The audio processing module is controlled in response to the operation of the recording and pause or play buttons.

[0015] In one specific embodiment, the processing logic of the main control module in response to the operation of the switch button is as follows: The internal timer identifies the number of consecutive short-term operations on the switch button, as well as the duration of a single long-term operation. When the operation is a series of short-duration operations, the lighting unit is cyclically switched between multiple brightness levels and the off state according to the number of consecutive short-duration operations. When the operation is a single long-duration operation, different instructions are executed depending on the duration of the operation, wherein: When the duration of the operation reaches a first preset duration threshold, the control system is activated; When the duration of the operation reaches a second preset duration threshold, the entire control system is shut down. When the duration of the operation reaches a third preset duration threshold and the lighting unit is in the on state, the current brightness level of the lighting unit is locked. The first preset duration threshold, the second preset duration threshold, and the third preset duration threshold are all parameters set within the control system.

[0016] In one embodiment, the main control module establishes the two-way call in the following ways: the wireless communication module receives downlink audio signals from the remote user and drives the speaker to play them through the audio processing module; and the microphone collects uplink audio signals from the surrounding environment and sends them to the remote user through the audio processing module and the wireless communication module, thereby establishing the two-way call.

[0017] Preferably, the control system further includes a power management module and a removable battery pack. The battery pack supplies power to the main control module, wireless communication module, audio processing module, and lighting unit through the power management module.

[0018] In one specific embodiment, the control system physically includes an intelligent control compartment connected to the fuselage of the UAV, and the main control module, wireless communication module, and audio processing module are located inside the intelligent control compartment; the lighting unit is specifically a gimbal light, and the gimbal light and the speaker are detachably connected to the intelligent control compartment.

[0019] A second aspect of the present invention provides a control method for an unmanned aerial vehicle (UAV) integrating a loudspeaker and lighting device, the method comprising the following steps: Step 1: Answer external dial-up calls through the wireless communication module to establish a call link; Step 2: Analyze the dual-tone multi-frequency signal generated by pressing the dial pad in the call link, and generate decoding command signals corresponding to different keypad keys; Step 3: Based on the decoded instruction signal, control an audio processing module or a lighting unit connected to the intelligent control compartment to achieve remote operation of the gimbal light and speaker; Step 4: Through the call link, a two-way call is realized between the remote user and the microphone connected to the audio processing module.

[0020] This invention provides a control system and method for integrating loudspeaker and lighting equipment into unmanned aerial vehicles (UAVs). It has the following beneficial effects: 1. This invention utilizes a wireless communication module to receive external dialing calls and parses dual-tone multi-frequency signals in the call link to generate control commands, thereby enabling remote control of equipment on the intelligent control cabin mounted on a drone. This control method does not require users to pre-install any specific applications or use special remote control equipment; any telephone with a dial pad can be used as a control terminal, significantly simplifying the operation process and improving the universality and convenience of the control method.

[0021] 2. This invention establishes a communication link based on a mobile communication network, so that the control distance is not limited by the signal range of traditional remote controllers or walkie-talkies, realizing long-range remote control. At the same time, by constructing a two-way audio channel that drives the speaker with downlink audio signals and collects microphone sound with uplink audio signals, this invention realizes two-way real-time communication between remote users and the drone on site. Compared with the traditional one-way shouting method, it improves the efficiency and accuracy of emergency command and on-site communication.

[0022] 3. This invention integrates three independent control paths: remote, local, and physical attitude control, improving the applicability and reliability of the device. In addition to remote multi-functional control via dual-tone multi-frequency (DTMF) signals, users can also operate the device directly via physical buttons on the local control unit. Furthermore, through an attitude sensing unit mounted on the lighting unit, the light switch can be controlled simply by changing the physical attitude of the pan-tilt lamp, without relying on any wireless signals. This multi-mode control design ensures effective control of the device under different application scenarios and signal conditions. Attached Figure Description

[0023] Figure 1 This is a control system architecture diagram according to an embodiment of the present invention; Figure 2 This is a flowchart of the posture sensing control lighting switch in an embodiment of the present invention; Figure 3 This is a flowchart illustrating the functional logic of the local control buttons in an embodiment of the present invention. Figure 4 This is a flowchart of the control method according to an embodiment of the present invention.

[0024] Among them, 10 is the main control module; 20 is the wireless communication module; 30 is the audio processing module; 40 is the lighting unit; and 50 is the attitude sensing unit. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see the appendix Figure 1 -Appendix Figure 3 The present invention provides a control system for an unmanned aerial vehicle (UAV) integrating a loudspeaker and lighting device, comprising: a main control module 10, a wireless communication module 20, an audio processing module 30, a lighting unit 40, an attitude sensing unit 50, a local control unit 60, and a power management module 70.

[0027] The main control module 10 is electrically connected to the wireless communication module 20, the audio processing module 30, the lighting unit 40, the attitude sensing unit 50, the local control unit 60, and the power management module 70. The main control module 10 is used to receive and process input signals from each module, and generate control commands according to preset logic to drive the corresponding modules to perform operations.

[0028] The wireless communication module 20 integrates a SIM card interface for accessing public mobile communication networks. Under the control of the main control module 10, the wireless communication module 20 answers external dial-up calls from remote users to establish a stable call link. After establishing the call link, the wireless communication module 20 separates the downlink audio signal and the dual-tone multi-frequency (DTMF) signal generated by the remote user via the telephone dial pad from the link, and sends the separated signal or its parsing result to the main control module 10.

[0029] The audio processing module 30 is connected to a microphone for capturing ambient sound and a speaker for broadcasting sound. The audio processing module 30 receives downlink audio signals from the wireless communication module 20 and drives the speaker to emit sound; simultaneously, it captures ambient audio from the microphone to generate uplink audio signals and transmits these uplink audio signals to the wireless communication module 20.

[0030] The lighting unit 40 is used to perform light-emitting operations according to the lighting control signal received from the autonomous control module 10, including turning on, turning off, adjusting brightness and flashing.

[0031] An attitude sensing unit 50 is disposed on the lighting unit 40 and is used to detect changes in the physical attitude of the lighting unit 40 and generate attitude signals.

[0032] The local control unit 60 includes physical buttons for receiving local operation input from the user.

[0033] The power management module 70 connects to the removable battery pack and provides power to all modules in the system.

[0034] During system operation, the main control module 10 receives and parses the dual-tone multi-frequency (DTMF) signal sent by the wireless communication module 20, generating decoding command signals corresponding to different keyboard keys. The main control module 10 has a pre-set set of mapping rules to convert the received specific decoding command signals into specific control operations for the audio processing module 30 or the lighting unit 40. For example, when the decoding command signal corresponds to the first specific DTMF signal, the main control module 10 generates and sends an activation command to the lighting unit 40; when the decoding command signal corresponds to the second specific DTMF signal, the main control module 10 generates and sends a recording command to the audio processing module 30. In this way, remote multi-functional control based on the public telephone network is achieved.

[0035] Simultaneously, the main control module 10 controls the wireless communication module 20 and the audio processing module 30 to work together. Specifically, the downlink audio signal is driven by the speaker to play via the wireless communication module 20 and the audio processing module 30, while the uplink audio signal is transmitted to the remote user via the audio processing module 30 and the wireless communication module 20. This establishes a full-duplex two-way communication between the remote user in the call link and the environment where the microphone is located. Furthermore, the main control module 10 can independently receive and process attitude signals from the attitude sensing unit 50 or button signals from the local control unit 60 to achieve non-remote device control.

[0036] Please see the appendix Figure 4 The present invention also provides a control method for an integrated loudspeaker and lighting device for a drone. This control method is implemented by running on the aforementioned control system. The execution of this control method is premised on the wireless communication module 20 successfully receiving an external dialing call and establishing a call link.

[0037] During call link maintenance, the core of this control method lies in executing a continuous, event-driven control loop. Specifically, when a remote user inputs a dual-tone multi-frequency (DTMF) signal via the telephone keypad, the first step of this control method is to parse the DTMF signal. This step is performed internally by the wireless communication module 20, which identifies the DTMF signal embedded in the downlink audio stream and converts it into a structured decoding instruction signal that can be directly processed by the main control module 10.

[0038] The second step of this control method is instruction execution. After receiving the decoded instruction signal, the main control module 10 uses it as input to trigger its internally preset control logic. This control logic generates and outputs specific hardware control signals based on different decoded instruction signals. For example, the main control module 10 generates a PWM signal based on one decoded instruction signal to control the brightness of the lighting unit 40, or starts the recording function of the audio processing module 30 based on another decoded instruction signal, or adjusts the gain of the power amplifier module in the audio processing module 30 based on yet another decoded instruction signal to change the speaker volume.

[0039] The third step of this control method is concurrent communication. The execution of the above control steps and the two-way call are concurrent and do not interrupt each other. During the intervals when the remote user inputs control commands and during the execution of commands, the wireless communication module 20 and the audio processing module 30 continuously maintain the transmission of downlink and uplink audio data to ensure that the voice communication between the remote user and the microphone's location is not delayed or interrupted.

[0040] Furthermore, the control method of the present invention also includes responses to other input sources. In both non-call and call states, the control method can also receive and process physical button signals from the local control unit 60, or attitude signals from the attitude sensing unit 50, and execute corresponding local control logic, thereby constituting a multi-path, multi-mode integrated control method.

[0041] The main control module 10 is the core of the control system in this embodiment of the invention.

[0042] In one specific embodiment, the hardware entity of the main control module 10 is a microcontroller unit (MCU), which is connected to the fuselage of the drone via a smart control bay. This MCU integrates the peripheral circuitry required to execute the method of the present invention, including but not limited to multiple general purpose input / output (GPIO) ports, one or more universal asynchronous receiver / transmitter (UART) interfaces, hardware timers / counters, and pulse width modulation (PWM) signal generators. The main control module 10 also includes non-volatile memory (such as Flash) for storing firmware programs and volatile memory (such as RAM) for storing data during program execution.

[0043] The main control module 10 communicates serially with the wireless communication module 20 through its UART interface to receive the decoding instruction signals parsed and sent by the latter.

[0044] The firmware of the main control module 10 includes an instruction parsing and dispatching program segment. After receiving a data frame from the wireless communication module 20, this program segment extracts the decoding instruction signal representing the dual-tone multi-frequency (DTMF) signal.

[0045] The firmware has a pre-defined static instruction mapping table that uniquely binds each expected decoded instruction signal (e.g., a specific byte representing key '1' to '9', '*', '#') to a specific function call or opcode. When a decoded instruction signal is received, the main control module 10 executes the bound operation by looking up the table or using a conditional judgment structure, such as calling the function that controls the lighting unit 40.

[0046] In one specific embodiment, the instruction mapping table binds the telephone keypad buttons to functions as follows: button '*' is used to turn on the lighting unit 40; button '#' is used to turn off the lighting unit 40; buttons '1' to '4' correspond to setting the lighting brightness to the first to fourth levels, respectively; button '5' is used to turn on the strobe mode, and button '6' is used to turn off the strobe mode; pressing button '7' for the first time starts recording playback, and pressing button '7' for the second time stops recording playback; holding down button '8' linearly decreases the speaker volume, and holding down button '9' linearly increases the speaker volume; button '0' is used to send an instruction to the wireless communication module 20 to turn it off and disconnect it from the network.

[0047] For signals from the attitude sensing unit 50, the main control module 10 uses a GPIO port configured as a digital input for reception. To ensure control accuracy, the main control module 10 employs a timer-based state machine logic to process the attitude signals. When the level of the GPIO port transitions from an inactive state (e.g., logic low) to an active state (e.g., logic high), the main control module 10 starts an internal timer. Only when the duration of the active state exceeds a preset anti-jitter duration threshold does the main control module 10 confirm the attitude signal as a valid attitude trigger.

[0048] After confirmation, the main control module 10 performs a logical inversion operation on an internally stored state variable that represents the switching state of the lighting unit, and updates the output control signal to the lighting unit 40 according to the new state variable value.

[0049] For signals from the local control unit 60, the main control module 10 also monitors them via a GPIO port configured as an input and utilizes an interrupt mechanism for immediate response. The firmware program starts a high-precision timer to accurately measure the duration of the physical button press and release. The program compares this duration with three internally set duration thresholds (a first preset duration threshold, a second preset duration threshold, and a third preset duration threshold) to distinguish between different long-duration operations.

[0050] Meanwhile, the program also includes a key counter and a timing window to identify the number of consecutive short operations within a specific time window. Based on the identified operation type (e.g., N consecutive short presses, duration between a first and second preset duration threshold, duration greater than the second preset duration threshold), the main control module 10 executes different preset control processes, such as cyclically switching brightness levels, locking the device status, or sending system power on / off commands to the power management module 70.

[0051] In one specific embodiment, the control flow of the switch button in the local control unit 60 is defined as follows: A single short press switches to the first brightness level; two consecutive short presses switch to the second brightness level; three consecutive short presses switch to the third brightness level; four consecutive short presses switch to the fourth brightness level; five consecutive short presses turn off the lighting. A first preset duration threshold is set to 5 seconds. In the initial power-off state, pressing and holding the switch button for 5 seconds starts the entire control system. A second preset duration threshold is set to 8 seconds. When the press and hold reaches 8 seconds, the system is powered off. A third preset duration threshold is set to 3 seconds. When the press and hold reaches 3 seconds at any brightness level, the current brightness level is locked.

[0052] Finally, the main control module 10 converts the results of the above logical processing into specific level signals or waveform signals for output.

[0053] For example, the lighting unit 40 can be turned on and off by changing the output level (high / low) of a GPIO port.

[0054] The wireless communication module 20 is a component used in this embodiment of the invention to implement remote communication and control.

[0055] In one specific embodiment, the wireless communication module 20 is a 4G LTE cellular communication module integrating a radio frequency front-end, a baseband processor, and a SIM card interface. The wireless communication module 20 establishes bidirectional serial communication with the main control module 10 via a UART interface, and follows the AT command set as the communication protocol between the two.

[0056] During the system initialization phase, the main control module 10 sends a preset AT command, such as "ATS0=1", to the wireless communication module 20 via the UART interface to configure the wireless communication module 20 to enter the working mode of automatically answering the call after one ring.

[0057] Subsequently, the wireless communication module 20 will remain residing in the mobile communication network and monitor any incoming call requests directed to its internal SIM card number. Once a call is detected, the wireless communication module 20 will autonomously answer the call without additional intervention from the main control module 10, thereby establishing a call link.

[0058] After the call link is established, one of the core functions of the wireless communication module 20 is the parsing of dual-tone multi-frequency (DTMF) signals. Its internal digital signal processor (DSP) or baseband processor continuously performs real-time Fourier transform (FFT) analysis on the downlink audio data stream. When the audio stream is detected to contain DTMF signal characteristics that conform to the International Telecommunication Union (ITU-T) standard, consisting of a high-frequency tone and a low-frequency tone, the module's firmware recognizes it as a valid key input.

[0059] Upon successful recognition, the wireless communication module 20 does not directly transmit the original dual-tone multi-frequency (DTMF) audio signal to the main control module 10. Instead, it converts it into a predefined, structured data frame. This data frame is typically a Unrequested Result Code (URC), such as an ASCII string in the format "+DTMF:[key]", where "[key]" represents the specific key character pressed (e.g., '1', '2', '#', '*'). This URC is actively sent to the main control module 10 via the UART interface, thus achieving the separation of control signals and voice signals.

[0060] Meanwhile, the voice portion of the downlink audio stream, excluding the dual-tone multi-frequency (DTMF) signal, is decoded by the wireless communication module 20 and output in real-time as a digital audio stream to the audio processing module 30 via its dedicated audio interface (e.g., a pulse code modulation (PCM) interface or an I2S interface). Correspondingly, the uplink digital audio stream from the audio processing module 30 is also input to the wireless communication module 20 through this audio interface. After encoding and modulation, it is transmitted to the mobile communication network via an antenna, thus forming a complete full-duplex audio path.

[0061] The audio processing module 30 is a hardware entity in this embodiment of the invention that implements audio signal acquisition, processing and playback.

[0062] In one specific embodiment, the core of the audio processing module 30 is an audio codec and a Class D audio power amplifier. The audio codec exchanges data with the wireless communication module 20 and the main control module 10 through a standard digital audio interface, such as the I2S bus.

[0063] For the downlink audio signal, i.e., the voice of the remote user, the digital audio stream (e.g., PCM data) from the wireless communication module 20 is input to the audio codec via the I2S bus. The digital-to-analog converter (DAC) inside the audio codec converts the digital audio stream into an analog audio signal. This analog signal is then sent to the power amplifier module (Class D audio power amplifier) ​​for power amplification, and the amplified signal is sufficient to drive the speaker to perform efficient electroacoustic conversion and produce sound.

[0064] For the uplink audio signal, i.e., the sound of the surrounding environment, the sound waves collected by the microphone are converted into weak analog electrical signals. This uplink audio signal is input into the audio codec, where it is first amplified and conditioned by a preamplifier, and then sampled and quantized by the analog-to-digital converter (ADC) inside the audio codec, converting it into an uplink digital audio stream. This uplink digital audio stream is then transmitted to the wireless communication module 20 via the I2S bus for remote transmission.

[0065] The speaker volume adjustment function is achieved by the main control module 10 controlling the gain of the audio power amplifier. When the main control module 10 receives a decoded command signal for adjusting the volume, it sends a command to the audio power amplifier or changes a control voltage through a control interface (such as an I2C bus or a dedicated control pin) to increase or decrease its internal gain linearly or logarithmically, thereby changing the signal power output to the speaker and realizing volume adjustment.

[0066] The recording operation is the result of the collaborative work of the main control module 10 and the audio processing module 30. Upon receiving a recording start command, the main control module 10 configures the audio codec, and sends the uplink digital audio stream (captured by the microphone and converted from analog to digital) to the wireless communication module 20, while simultaneously making a copy and sending it to the main control module 10 via the I2S bus. The main control module 10 receives this audio data stream and writes it to a non-volatile storage medium (e.g., a MicroSD card) connected to it according to a preset audio file format (e.g., WAV), thereby achieving local recording of the audio on-site.

[0067] The lighting unit 40 is the actuator that performs the light-emitting operation in this embodiment of the invention.

[0068] In one specific embodiment, the lighting unit 40 is physically a gimbal lamp, which internally includes a high-power LED array and a constant current drive circuit. The constant current drive circuit is electrically connected to one or more GPIO ports of the main control module 10 to receive control signals from the main control module 10.

[0069] The lighting unit 40 is turned on and off by the main control module 10 changing the output level of a dedicated GPIO port (for example, a high level for turning on and off, and a low level for waiting for 3 seconds) to control the enable terminal of the constant current drive circuit.

[0070] The brightness adjustment of the lighting unit 40 is achieved by the main control module 10 outputting a PWM (Pulse Width Modulation) signal to the dimming input terminal of the constant current drive circuit. By changing the duty cycle of this PWM signal, the main control module 10 can linearly adjust the average current flowing through the LED array, thereby controlling its brightness.

[0071] In strobe mode, the main control module 10 generates a square wave signal of a specific frequency (e.g., 2Hz) to periodically switch the constant current drive circuit on and off, causing the lighting unit 40 to produce regular flashing.

[0072] The attitude sensing unit 50, in this embodiment, is a mercury switch, which is physically fixed to the housing of the lighting unit 40. The installation direction of the mercury switch is preset so that when the attitude of the lighting unit 40 changes from a horizontal or downward state to an upward state exceeding a certain preset angle (for example, upward at 30 degrees relative to the horizontal plane), the mercury beads inside will roll to one end due to gravity, making the two electrodes inside conductive.

[0073] The signal line of the mercury switch is connected to a GPIO port of the main control module 10. The mercury switch uses the rolling of its internal ball bearing to control the on / off state of the signal.

[0074] When the lighting unit 40 is in an upward tilt position, the mercury switch is closed, sending a high-level signal (first level signal) to the GPIO port. When the lighting unit 40 is not in an upward tilt position, the mercury switch is open, and the GPIO port reads a low-level signal (second level signal).

[0075] The logic for the main control module 10 to process the level signal of this GPIO port is as follows: When the GPIO port level is detected to change from low to high, the main control module 10 starts an internal hardware timer to start timing. During the timing period, the main control module 10 continuously monitors the port level.

[0076] If the level returns to low before the preset duration (in one specific embodiment, the preset duration is 3 seconds) is reached, the trigger is considered invalid (e.g., a momentary attitude change caused by flight turbulence), and the timer is reset.

[0077] The main control module 10 can only confirm that this is a valid control intention when the high-level state lasts for a period of time equal to or exceeding the preset duration.

[0078] In one specific embodiment, the preset duration is 3 seconds, that is, the lighting unit 40 is considered to be a valid switch trigger only after it has maintained an upward posture for 3 seconds.

[0079] After confirmation, the main control module 10 performs an inversion operation on a Boolean variable used to record the lighting switch status, and updates the switch control signal for the lighting unit 40 according to the new status of the variable.

[0080] When the attitude is restored and the port level changes from high to low and remains low, the main control module 10 does not perform any operation, but only waits for the next valid trigger from low to high.

[0081] The local control unit 60 provides a direct control path that does not rely on wireless communication in this embodiment of the invention.

[0082] In one specific embodiment, the local control unit 60 includes a power button, a record / pause button, and a play button. Physically, it is a momentary contact type physical button, with one end grounded and the other end connected to a GPIO port of the main control module 10. This GPIO port is configured as an input mode within the main control module 10, with internal pull-up resistors enabled, and is also configured as an edge-triggered interrupt mode to detect changes in the button's state in real time.

[0083] The firmware program running inside the main control module 10 analyzes the operation of the switch button through a precise event handling and timing mechanism.

[0084] When a user presses a button, the GPIO port level changes from high to low, triggering a falling-edge interrupt. The interrupt service routine records the start timestamp of this button event and starts a hardware timer. When the user releases the button, the port level changes from low to high, triggering a rising-edge interrupt. The interrupt service routine records the end timestamp and calculates the duration of the button press.

[0085] For the identification of continuous short-term operations, the firmware of the main control module 10 maintains a key event counter and a timeout timer.

[0086] A valid short-term operation is defined as a key press whose duration is less than a preset short-press duration threshold.

[0087] After a valid short-time operation occurs, the counter is incremented, and the timeout timer is reset. If another valid short-time operation is detected within the window specified by the timeout timer (e.g., 500 milliseconds), the counter continues to increment and the timer is reset. If no new short-time operation occurs before the timeout timer expires, the final count value is used as the number of consecutive short-time operations for this operation, and the corresponding control logic is executed based on this count. For example, when the count is 1, the system switches to the next brightness level; when the count is 2, it switches directly to strobe mode; and when the count is 3, the lighting is turned off. These states cycle through a preset state array.

[0088] For recognizing a single long-duration operation, when a button is continuously pressed and its duration exceeds the short-press duration threshold, the main control module 10 determines it as a long-duration operation. The firmware program continuously monitors the cumulative duration of this operation and compares it with two internally set, non-volatile stored parameters: a first preset duration threshold, a second preset duration threshold, and a third preset duration threshold.

[0089] When the control system is initially powered off, if the switch button is pressed continuously for a duration reaching a first preset threshold (e.g., 5 seconds), the main control module 10 executes a system power-on command. When the control system is powered on, if the duration reaches a second preset threshold (e.g., 8 seconds), the main control module 10 executes a system power-off command. Specifically, the main control module 10 sends a clear power-on or power-off signal to the power management module 70 through a dedicated control line. Upon receiving the signal, the power management module 70 will turn on or off the power supply to the main control module 10 and other peripheral modules, thereby powering on or off the entire control system.

[0090] When the control system is powered on and the lighting unit 40 is lit, if the switch button is pressed for a duration that reaches the third preset duration threshold (e.g., 3 seconds), the main control module 10 will lock the current brightness level of the lighting unit 40.

[0091] Specifically, after the lighting unit 40 is turned on and the brightness level is locked by pressing and holding the switch button for 3 seconds, a short press will keep the light on at that brightness level, unaffected by the mercury switch, allowing for prolonged illumination. A short press turns it off, and the mercury switch resumes operation. The locking of the current brightness level of the lighting unit 40 can be canceled by turning the control system off and on again.

[0092] The audio processing module can be controlled via the record / pause or play buttons. Specifically, a long press of the record / pause button will start recording after a system beep; releasing the button will stop recording after another beep. During playback, a short press of the record / pause button will pause playback. A short press of the play button will play the most recently recorded audio file.

[0093] In one embodiment of the invention, the control system adopts a modular design in its physical structure to achieve functional integration and convenient maintenance. The main control module 10, wireless communication module 20, audio processing module 30, and power management module 70 are all integrated and encapsulated inside an intelligent control compartment. This intelligent control compartment provides structural support and environmental protection.

[0094] The housing of the intelligent control compartment has two Type-C physical interfaces, one of which is marked "IN" and is used as a charging interface for the internal battery pack; the other is marked "OUT" and is used as a power supply interface for the external lighting unit 40.

[0095] One side of the intelligent control compartment's housing is equipped with a microphone for two-way communication, while the other side has a dedicated microphone for local recording. The local control unit 60 is integrated into the housing of the intelligent control compartment.

[0096] The lighting unit 40 (specifically a gimbal light) and the horn, as external functional components, are detachably connected to the intelligent control compartment via a standardized quick-release interface. This quick-release interface integrates a mechanical locking structure and a multi-pin electrical connector. The mechanical locking structure ensures a stable connection during drone flight, while the electrical connector is responsible for transmitting power and control signals between the intelligent control compartment and the external functional components, allowing the lighting unit 40 or the horn to be replaced or removed independently without disassembling the main body of the intelligent control compartment.

[0097] The intelligent control compartment can be secured to the drone body via a dedicated snap-fit ​​structure or by straps. To accommodate different needs, the battery pack protective cover is available in two sizes: a standard protective cover and a cover that integrates the mounting position of the wireless communication module 40. The power cable connecting the lighting unit 40 to the intelligent control compartment contains an internal steel wire structure, making the cable flexible, able to bend and maintain a specific shape.

[0098] The entire system is powered by a removable battery pack. The power output of the battery pack is centrally allocated and managed by the power management module 70. The power management module 70 contains multiple DC-DC step-down converter circuits, which convert the original voltage of the battery pack (e.g., 12V or 24V) into the operating voltage required by different modules in the system. For example, it provides 5V or 3.3V to the main control module 10 and the wireless communication module 20, and provides a higher operating voltage to the audio power amplifier in the audio processing module 30.

[0099] The power management module 70 also integrates voltage and current detection circuits for real-time monitoring of the battery pack's output voltage. When the battery voltage is detected to be lower than a preset low-voltage protection threshold, the power management module 70 sends a low-battery alarm signal to the main control module 10 via a dedicated signal pin, so that the main control module 10 can perform corresponding alarm or safety operations. On the other hand, under the action of its internal battery protection circuit, it can actively cut off the discharge circuit to prevent the battery from being over-discharged and damaged.

[0100] In addition, the power management module 70 also receives a system shutdown command from the main control module 10. When this command signal is received (for example, triggered by pressing and holding a physical button on the local control unit 60), its internal power control logic will execute a preset power-down sequence to safely cut off the power supply to all load modules and complete the hardware-level shutdown of the system.

[0101] The above are merely specific embodiments of the present invention. Through the detailed description of the above embodiments, those skilled in the art can clearly understand that the control system disclosed in the present invention systematically integrates multiple functional modules such as the main control module 10, the wireless communication module 20, the audio processing module 30, the lighting unit 40, and the power amplifier module, and establishes clear signal interaction and control relationships among them.

[0102] Specifically, this demonstrates how to utilize a single public mobile communication network call link to transmit control commands via in-band parsing of dual-tone multi-frequency (DTMF) signals, concurrently with full-duplex two-way audio communication. All components of this technical solution and their collaborative workflows have been fully disclosed, forming a complete and technically feasible solution.

Claims

1. A control system for an unmanned aerial vehicle (UAV) integrating a loudspeaker and lighting equipment, characterized in that, The application relates to a control system for a wireless communication device, comprising: a main control module; a wireless communication module electrically connected to the main control module, the wireless communication module being configured to receive an external dial-up call to establish a call link, and separate a downlink audio signal and a dual-tone multi-frequency signal generated by pressing a dialing keypad of the wireless communication device from the call link; an audio processing module electrically connected to the main control module, the audio processing module being connected to a microphone and a loudspeaker, and being configured to drive the loudspeaker to emit sound according to the received downlink audio signal, and collect live audio of the microphone to generate an uplink audio signal; a lighting unit electrically connected to the main control module, the lighting unit being configured to perform light-emitting operation according to a received lighting control signal; wherein the main control module is configured to: receive the downlink audio signal and the dual-tone multi-frequency signal separated by the wireless communication module; analyze the dual-tone multi-frequency signal to generate a decoding instruction signal corresponding to different keypad keys, and control the audio processing module or the lighting unit according to the decoding instruction signal; control the wireless communication module and the audio processing module to work cooperatively to establish a two-way call between a remote user of the call link and a live environment where the microphone is located.

2. The control system of a UAV integrated megaphone and lighting device according to claim 1, wherein, The decoding instruction signal comprises: lighting control instructions for controlling the lighting unit to turn on, turn off, adjust brightness, and switch to a flash mode; and audio control instructions for controlling the audio processing module to perform recording switching operation and adjust the loudspeaker volume.

3. The control system of claim 1, wherein, The application further comprises a posture sensing unit arranged on the lighting unit, wherein the posture sensing unit is a mercury switch, and the posture sensing unit is configured to generate a posture signal when a physical posture of the lighting unit changes relative to a gravity direction; the main control module is further configured to control the lighting unit to turn on or turn off according to the posture signal. The processing logic of the main control module for the posture signal comprises:

4. The control system of a UAV integrated megaphone and lighting device according to claim 3, wherein, when the posture signal is a first level signal representing an upward posture and a duration of the first level signal reaches a preset time length, performing a flip operation on a switch state of the lighting unit once; and when the posture signal is a second level signal representing a non-upward posture and a duration of the second level signal reaches the preset time length, not triggering any instruction and waiting for a next flip operation triggered by the first level signal. The application further comprises a local control unit electrically connected to the main control module, wherein the local control unit comprises at least one physical key, a recording and pausing key, and a playing key; 5. The control system of the unmanned aerial vehicle integrated megaphone and lighting device according to claim 1, wherein, the main control module is further configured to: control the lighting unit and the control system in response to an operation on the switch key; control the audio processing module in response to an operation on the recording and pausing key or the playing key. The processing logic of the main control module for controlling in response to the operation on the switch key comprises: identifying a number of continuous short-time operations on the switch key and a duration of a single long-time operation.

6. The control system of a UAV integrated megaphone and lighting device according to claim 5, wherein, ​ ​ When the operation is a continuous short-time operation, according to the number of the continuous short-time operation, the multiple brightness levels of the lighting unit and the off state are cyclically switched; When the operation is a single long-time operation, different instructions are executed according to the different duration of the operation, wherein: When the duration of the operation reaches a first preset duration threshold, the control system is turned on; When the duration of the operation reaches a second preset duration threshold, the entire control system is turned off; When the duration of the operation reaches a third preset duration threshold, and the lighting unit is in an on state, the current brightness level of the lighting unit is locked; The first preset duration threshold, the second preset duration threshold and the third preset duration threshold are all parameters set in the control system.

7. The control system of a UAV integrated megaphone and lighting device according to claim 1, wherein, The main control module establishes the two-way communication in the following manner: The wireless communication module receives the downlink audio signal from the remote user, and drives the loudspeaker to play through the audio processing module; And the microphone collects the uplink audio signal of the on-site environment, and sends it to the remote user through the audio processing module and the wireless communication module, to realize the establishment of the two-way communication.

8. The control system of a drone integrated megaphone and lighting device according to claim 1, wherein, Further comprising a power management module and a detachable battery pack: The battery pack supplies power to the main control module, wireless communication module, audio processing module and lighting unit through the power management module.

9. The control system of a drone integrated megaphone and lighting device according to claim 1, wherein, The control system physically includes an intelligent control bin, which is connected to the unmanned aerial vehicle body, and the main control module, wireless communication module and audio processing module are arranged in the intelligent control bin; The lighting unit is a gimbal lamp, and the gimbal lamp and the loudspeaker are detachably connected to the intelligent control bin. 10.A method for controlling a UAV integrated megaphone and lighting device, the method comprising: The control system of the unmanned aerial vehicle integrated shouting and lighting device according to any one of the above claims 1-9 comprises the following steps: Answering external dial-up calls through the wireless communication module to establish a communication link; Analyzing the dual-tone multi-frequency signal generated by pressing the dialing keyboard of the telephone in the communication link to generate a decoding instruction signal corresponding to different keyboard keys; According to the decoding instruction signal, an audio processing module or a lighting unit connected to the intelligent control bin is controlled to realize remote operation of the gimbal lamp and the loudspeaker; Through the communication link, two-way communication between the remote user and the microphone connected to the audio processing module is realized.

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