Cross-domain communication gateway system based on intelligent mobile terminal

Abstract

The invention discloses a cross-domain communication gateway system based on an intelligent mobile terminal, and belongs to the technical field of air-sea cross-medium communication. The device comprises an electronic cabin section and a floating body connected with the electronic cabin section, an intelligent mobile terminal, a signal amplification conditioning board, a power supply management module and a radio frequency communication module are arranged in the electronic cabin section, and the signal amplification conditioning board and the radio frequency communication module are both in wire connection with the intelligent mobile terminal; the top of the electronic cabin section is connected with an antenna; the antenna is in wire connection with the radio frequency communication module; the lower part of the electronic cabin section is connected with a transmitting-receiving combined transducer; the transmitting-receiving combined transducer is in wire connection with the signal amplification conditioning board; and the power supply management module is in wire connection with the signal amplification conditioning board. According to the cross-domain communication gateway, the intelligent mobile terminal and the receiving and transmitting combined transducer are used as the underwater acoustic signal receiving and transmitting end, and the problems that an existing cross-domain communication gateway is high in development cost, cannot be rapidly transplanted and is poor in expandability are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air-sea cross-medium communication, and in particular to a cross-domain communication gateway system based on an intelligent mobile terminal. Background Art

[0002] Air-sea cross-medium communication is a core challenge in the field of ocean observation. Traditional communication methods are limited by the rapid attenuation of radio waves underwater and the inability of sound waves to break through the sea surface, and need to rely on relay nodes. Cross-domain communication gateway technology effectively solves this problem by supporting wireless and underwater acoustic dual-mode communication.

[0003] With the advancement of ocean exploration and development, small unmanned submersibles such as AUV and ROV are widely used in underwater missions, and the demand for wireless and efficient remote control is becoming increasingly prominent. As the only way to transmit underwater long distances, underwater acoustic communication plays a key role in marine informatization.

[0004] However, traditional underwater acoustic communication equipment is based on embedded devices such as DSP, ARM, etc., and has problems such as high development cost, long cycle, large size, and high power consumption.

[0005] Therefore, it is necessary to provide a cross-domain communication gateway system based on smart mobile terminals. Summary of the invention

[0006] The purpose of the present invention is to provide a cross-domain communication gateway system based on an intelligent mobile terminal to solve the problems of high development cost, inability to quickly transplant and poor scalability of existing cross-domain communication gateways.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A cross-domain communication gateway system based on a smart mobile terminal, comprising: An electronic compartment and a floating body connected to the electronic compartment; The electronic compartment is provided with an intelligent mobile terminal, a signal amplification and conditioning board, a power management module and a radio frequency communication module, and the signal amplification and conditioning board and the radio frequency communication module are both connected to the intelligent mobile terminal line; An antenna is connected to the top of the electronic compartment, and the antenna is connected to the radio frequency communication module line; A transceiver and transducer is connected below the electronic compartment, and the transceiver and transducer is connected to the signal amplification and conditioning board by wire; The radio frequency communication module is used to support airspace wireless communication; The power management module is connected to the signal amplification and conditioning board line, and is used to supply power to the signal amplification and conditioning and the smart mobile terminal; The transducer is used to convert the electrical signal into an acoustic signal and transmit it, and to collect the acoustic signal, convert it into an electrical signal, and send it to the signal amplification and conditioning board for processing.

[0008] Furthermore, the intelligent mobile terminal is internally integrated with an underwater acoustic communication module, a signal acquisition module, an information reading / display module and a Type-c interface; The underwater acoustic communication module is used to convert text information into a binary sequence, adapt to the underwater acoustic channel, and suppress noise; The signal acquisition module is used to receive the analog signal from the signal amplification and conditioning board and convert it into a digital signal; The information reading / display module provides a human-computer interaction interface for real-time display of communication status, transmission data and system parameters; The Type-c interface is connected to the signal amplification and conditioning board to achieve bidirectional power supply and high-speed data transmission.

[0009] Furthermore, the underwater acoustic communication module includes: Character encoding module, used to convert text information into binary sequences; Signal modulation and demodulation module, using OFDM or PSK modulation to adapt to the underwater acoustic channel; Signal detection module for suppressing noise through adaptive filtering.

[0010] Furthermore, the signal amplification and conditioning board is integrated with: a power amplification module, a preamplification module, a first power interface, a second power interface, an audio interface and a transducer interface; The power amplifier module is used to amplify the signal output by the smart mobile terminal and drive the transceiver to transmit the acoustic signal; The preamplifier module is used to amplify the received underwater acoustic signal and transmit it back to the smart mobile terminal for demodulation; The first power interface is connected to the power management module and is used to access the power supply; The second power interface is connected to the smart mobile terminal and is used to supply power to the smart mobile terminal; The audio interface is connected to the smart mobile terminal; The transducer interface is connected to the transceiver transducer.

[0011] Furthermore, the radio frequency communication module includes a radio frequency communication reading and writing module for interacting with the intelligent mobile terminal.

[0012] Furthermore, the radio frequency communication mode of the radio frequency communication module includes a mobile communication mode and a satellite communication reflection.

[0013] The present invention has the following beneficial effects: The present invention uses an intelligent mobile terminal and a transceiver as an underwater acoustic signal transceiver. When sending information, the intelligent mobile terminal device receives external information through a radio frequency communication module, and then the intelligent mobile terminal processes the external information to form a message to be sent. The intelligent mobile terminal software performs character encoding, data modulation and other processing on the message, and then sends it to a signal amplification and conditioning board through a sending thread. After power amplification, it is transmitted to the transceiver, and the electrical signal is converted into an acoustic signal and sent out; when receiving information, the transceiver collects the underwater acoustic signal and sends it to the signal amplification and conditioning board for processing, and the processing result is sent to the intelligent mobile terminal for signal demodulation, and the demodulation result is transmitted to a designated device through a radio frequency communication module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of the cross-domain communication gateway system based on the intelligent mobile terminal in this embodiment; Figure 2 Schematic diagram of the internal structure of the cross-domain communication gateway system based on the intelligent mobile terminal in this embodiment; Figure 3 This is a block diagram of the software module design of the underwater acoustic communication device in this embodiment. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0016] Reference Figure 1-Figure 2 This embodiment provides a cross-domain communication gateway system based on a smart mobile terminal, including: an electronic compartment and a floating body connected to the electronic compartment, and the floating body is used to provide buoyancy support for the cross-domain communication gateway.

[0017] The electronic compartment is equipped with an intelligent mobile terminal, a signal amplification and conditioning board, a power management module and a radio frequency communication module. The signal amplification and conditioning board and the radio frequency communication module are connected to the intelligent mobile terminal. The power management module is connected to the signal amplification and conditioning board to supply power to the signal amplification and conditioning board and the intelligent mobile terminal.

[0018] An antenna is connected to the top of the electronic compartment, and the antenna is connected to the RF communication module line to enhance the RF communication signal strength.

[0019] A transceiver and transducer is connected below the electronic compartment, and the transceiver and transducer is connected to the signal amplification and conditioning board.

[0020] In this embodiment, the smart mobile terminal is a smart mobile device such as a mobile phone / personal computer. The smart mobile terminal (such as an Android phone) serves as the control center of the system and integrates an underwater acoustic communication module, a signal acquisition module, an information reading / display module and a Type-c interface. The underwater acoustic communication module is used to convert text information into a binary sequence, adapt to the underwater acoustic channel, and suppress noise. The underwater acoustic communication module includes: a character encoding module for converting text information into a binary sequence; a signal modulation and demodulation module, which uses OFDM or PSK modulation to adapt to the underwater acoustic channel; and a signal detection module for suppressing noise through adaptive filtering. The signal acquisition module is used to receive analog signals from the signal amplification and conditioning board and convert them into digital signals. The information reading / display module provides a human-computer interaction interface for real-time display of communication status, transmission data and system parameters. The Type-c interface is connected to the signal amplification and conditioning board to achieve two-way power supply and high-speed data transmission to ensure low-latency communication.

[0021] Specifically, the signal amplification and conditioning board integrates: a power amplifier module, a preamplifier module, a first power interface, a second power interface, an audio interface and a transducer interface. The power amplifier module is used to amplify the low-power signal output by the smart mobile terminal to a power level suitable for underwater acoustic transmission (typical value ≥ 20dB), and drive the transceiver to transmit the acoustic signal. The preamplifier module is used to perform low-noise amplification (gain ≥ 60dB) on the received underwater acoustic signal, and transmit it back to the smart mobile terminal through the audio interface for demodulation. The first power interface is connected to the power management module for access to a 12V DC power supply. The second power interface is connected to the smart mobile terminal via Type-c to power the smart mobile terminal and ensure long-term battery life of the system. The audio interface is connected to the smart mobile terminal; the transducer interface is connected to the transceiver through a watertight cable.

[0022] Specifically, the RF communication module can be built into the smart mobile terminal or connected to the smart mobile terminal via WIFI / Bluetooth / wired mode. The RF communication module interacts with the smart mobile terminal through the built-in RF communication read-write module to achieve command transmission and data relay. In cross-domain communication, the RF communication module is responsible for establishing a connection with a surface base station or satellite to complete the real-time transmission of airspace data. The RF communication mode of the RF communication module includes mobile communication mode and satellite communication reflection, supporting airspace wireless communication.

[0023] In this embodiment, the transceiver is used to convert electrical signals into acoustic signals and transmit them, and collect acoustic signals and convert them into electrical signals, and send them to the signal amplification and conditioning board for processing. The transceiver is made of piezoelectric ceramic material, with an operating frequency band of 8kHz-16kHz, covering the needs of medium and short-range underwater acoustic communication.

[0024] Its core functions include: Transmitting mode: The power-amplified electrical signal is converted into an acoustic signal and transmitted directionally through the water medium.

[0025] Receiving mode: Capture underwater acoustic signals and convert them into electrical signals, which are then sent to the smart mobile terminal for processing after pre-amplification.

[0026] The watertight cable adopts a double-layer shielding structure with integrated power and signal lines to ensure reliable connection in deep water environments while reducing the impact of electromagnetic interference on signal quality.

[0027] Specifically, the power management module integrates a lithium polymer battery pack and an intelligent power distribution unit, and implements a dynamic power consumption control strategy to prioritize power supply to the signal amplification and conditioning board to ensure stable operation of the power amplification module. In standby mode, it cuts off power supply to non-essential modules (such as RF communication modules) to reduce overall power consumption, supports solar-assisted charging interfaces, and extends deployment cycles in marine environments.

[0028] The present invention uses an intelligent mobile terminal and a transceiver as an underwater acoustic signal transceiver. When sending information, the intelligent mobile terminal device receives external information through a radio frequency communication module, and then the intelligent mobile terminal processes the external information to form a message to be sent. The intelligent mobile terminal software performs character encoding, data modulation and other processing on the message, and then sends it to a signal amplification and conditioning board through a sending thread. After power amplification, it is transmitted to the transceiver to convert the electrical signal into an acoustic signal and send it out; when receiving information, the transceiver collects the underwater acoustic signal and sends it to the signal amplification and conditioning board for processing, and sends the processing result to the intelligent mobile terminal for signal demodulation, and transmits the demodulation result to a designated device through a radio frequency communication module, thereby solving the problems of high development cost, inability to quickly transplant, and poor scalability of the existing cross-domain communication gateway.

[0029] See also Figure 3 , this embodiment provides a software module design of an underwater acoustic communication device, which includes a transmitting end and a receiving end.

[0030] The transmitting end is composed of an intelligent mobile terminal, a transceiver and a signal amplification and conditioning board. The signal amplification and conditioning board is connected to the intelligent mobile terminal through an audio interface and connected to the transceiver through a transducer interface. In this embodiment, the transceiver is preferably a piezoelectric transducer.

[0031] The receiving end underwater acoustic communication device is symmetrical in structure with the transmitting end, and integrates synchronous detection and signal demodulation functions.

[0032] The specific workflow of the transmitter is as follows: 1. Information input and encoding The shore-based control center sends information to the intelligent mobile terminal in the cross-domain communication gateway through the radio frequency communication module. The intelligent mobile terminal processes the information and packages it into sending information. The sending thread calls the character encoding module to convert the information into a binary data stream, and performs scrambling and interleaving processing to enhance anti-interference capabilities.

[0033] 2. Signal modulation and synchronization The encoded data is modulated by OFDM (Orthogonal Frequency Division Multiplexing) and QPSK (Quadrature Phase Shift Keying) to generate a multi-carrier modulated signal, and the synchronization header and cyclic prefix are inserted to ensure accurate synchronization at the receiving end. The OFDM anti-multipath fading characteristics and QPSK high spectrum efficiency are used to improve the communication stability in complex underwater acoustic environments.

[0034] 3. Audio signal generation and transmission The modulated signal is converted into an analog audio signal through the D / A of the smart mobile terminal sound card and output to the signal amplification and conditioning board through the AudioTrack interface. The Android sound card realizes efficient conversion between digital and analog signals and supports low-latency data transmission.

[0035] 4. Power amplification and acoustic signal transmission The signal amplification and conditioning board filters and amplifies the audio signal, drives the piezoelectric transducer to convert the electrical signal into an acoustic signal (frequency band 8kHz-16kHz), and transmits it omnidirectionally through the underwater acoustic channel.

[0036] The specific workflow of the receiving end is as follows: 1. Signal acquisition and preprocessing The receiving smart mobile terminal starts the AudioRecorder class to collect PCM format audio data in real time and stores it in the buffer; the main thread continuously monitors the data status.

[0037] 2. Synchronous detection and frame alignment The demodulation thread extracts the data frame from the buffer and matches the synchronization header signal through the correlation detection method. The insertion and detection of the synchronization header ensures reliable frame alignment under the multipath effect of the underwater acoustic channel. If the correlation peak exceeds the preset threshold, the signal start bit is determined and the frame synchronization is completed; otherwise, the acquisition continues.

[0038] 3. Signal demodulation and decoding After synchronization, OFDM demodulation (removing the cyclic prefix) and QPSK demodulation are performed in sequence to restore the original data stream; followed by deinterleaving, descrambling and character decoding to restore the text or command information.

[0039] 4. Result display and relay The decoded information is recorded and displayed in the database and can be uploaded to the shore-based control center via a radio frequency communication module (such as 4G / satellite).

[0040] In this embodiment, the modulation method (such as OFDM / QPSK) is defined by software to adapt to different underwater acoustic channel conditions. At the same time, the synchronization head design, interleaving and scrambling mechanism are performed to significantly improve the ability to resist noise and multipath interference, completing the full-link closed loop from information input to acoustic signal transmission / reception, ensuring the system is efficient and reliable.

[0041] With the popularization of intelligent mobile terminal systems, their unified standards, good compatibility and stability provide strong support for mobile terminals. Mobile devices integrate a variety of sensors and audio processing modules to facilitate the collection and processing of audio signals. Therefore, the development of air-sea cross-domain communication devices based on intelligent mobile terminals not only retains the advantages of air-sea cross-media communication, but also solves many drawbacks of traditional equipment, closely combines the intelligence of mobile devices with air-sea cross-media communication, and provides a more efficient and convenient solution for ocean exploration.

[0042] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cross-domain communication gateway system based on intelligent mobile terminals, characterized in that: include: An electronic compartment and a floating body connected to the electronic compartment; The electronic compartment is provided with an intelligent mobile terminal, a signal amplification and conditioning board, a power management module and a radio frequency communication module, and the signal amplification and conditioning board and the radio frequency communication module are both connected to the intelligent mobile terminal line; An antenna is connected to the top of the electronic compartment, and the antenna is connected to the radio frequency communication module line; A transceiver and transducer is connected below the electronic compartment, and the transceiver and transducer is connected to the signal amplification and conditioning board by wire; The radio frequency communication module is used to support airspace wireless communication; The power management module is connected to the signal amplification and conditioning board line, and is used to supply power to the signal amplification and conditioning and the smart mobile terminal; The transducer is used to convert the electrical signal into an acoustic signal and transmit it, and to collect the acoustic signal and convert it into an electrical signal and send it to the signal amplification and conditioning board for processing; The intelligent mobile terminal is internally integrated with an underwater acoustic communication module, a signal acquisition module, an information reading / display module and a Type-c interface; The underwater acoustic communication module is used to convert text information into a binary sequence, adapt to the underwater acoustic channel, and suppress noise; The signal acquisition module is used to receive the analog signal from the signal amplification and conditioning board and convert it into a digital signal; The information reading / display module provides a human-computer interaction interface for real-time display of communication status, transmission data and system parameters; The Type-c interface is connected to the signal amplification and conditioning board to achieve bidirectional power supply and high-speed data transmission; The underwater acoustic communication module comprises: Character encoding module, used to convert text information into binary sequences; Signal modulation and demodulation module, using OFDM or PSK modulation to adapt to the underwater acoustic channel; A signal detection module for suppressing noise through adaptive filtering; The radio frequency communication module includes a radio frequency communication reading and writing module for interacting with the intelligent mobile terminal.

2. The cross-domain communication gateway system based on intelligent mobile terminals according to claim 1 is characterized in that: The signal amplification and conditioning board integrates: a power amplification module, a preamplification module, a first power interface, a second power interface, an audio interface and a transducer interface; The power amplifier module is used to amplify the signal output by the intelligent mobile terminal and drive the transceiver to transmit the acoustic signal; The preamplifier module is used to amplify the received underwater acoustic signal and transmit it back to the smart mobile terminal for demodulation; The first power interface is connected to the power management module and is used to access the power supply; The second power interface is connected to the smart mobile terminal and is used to supply power to the smart mobile terminal; The audio interface is connected to the smart mobile terminal; The transducer interface is connected to the transceiver transducer.

3. The cross-domain communication gateway system based on intelligent mobile terminals according to claim 1 is characterized in that: The radio frequency communication mode of the radio frequency communication module includes mobile communication mode and satellite communication reflection.

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