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CN-122017954-A - Cable-free submarine observation platform based on underwater acoustic communication

CN122017954ACN 122017954 ACN122017954 ACN 122017954ACN-122017954-A

Abstract

The invention discloses a cable-free submarine observation platform based on underwater acoustic communication, and relates to the technical field of ocean observation and underwater communication. The submarine observation platform based on underwater acoustic communication comprises a battery cabin unit, an earthquake unit, a signal processing module, an intelligent event discriminating module, a low-power sleep monitoring module, an acoustic communication unit, a communication ball unit, a communication module and a wireless communication module, wherein the battery cabin unit is used for stably supplying power to each unit, the earthquake unit synchronously collects multichannel submarine original signals, the signal processing module in the embedded processing unit is used for receiving the original signals and extracting features to generate data to be discriminated, the intelligent event discriminating module is used for analyzing the data to be discriminated to generate target data through a lightweight neural network model, the low-power sleep monitoring module is used for realizing energy-saving control, the acoustic communication unit is used for executing self-adaptive compression and channel coding on the target data to generate a transmission bit stream, and the transmission bit stream is modulated to generate a modulation signal and is transmitted to a target receiving end through the built-in underwater acoustic transducer of the communication ball unit to realize the transmission of the wireless data.

Inventors

  • LIU FENG
  • XU XIQIANG

Assignees

  • 中地装（重庆）地质仪器有限公司

Dates

Publication Date
20260512
Application Date
20260104

Claims (8)

  1. 1. The cable-free submarine observation platform based on underwater acoustic communication is characterized by comprising a battery compartment unit, an earthquake unit, an acoustic communication unit, a communication ball unit and an embedded processing unit; The battery compartment unit provides stable power supply for each unit; The earthquake unit is used for synchronously collecting multi-channel submarine original signals; The embedded processing unit comprises a low-power-consumption sleep monitoring module, a signal processing module and an intelligent event judging module: the signal processing module receives the multi-channel submarine original signal, performs characteristic extraction processing and generates data to be distinguished; The intelligent event discriminating module analyzes the data to be discriminated through the lightweight neural network model to generate target data; The sound communication unit performs adaptive compression and channel coding processing on target data to generate a transmission bit stream for compressing the data ; The communication ball unit is internally provided with an underwater acoustic transducer, and modulates the compressed data by transmitting bit stream to generate a modulation signal And transmitted to the target receiving end.
  2. 2. The submarine observation platform based on underwater acoustic communication according to claim 1, wherein the seismic unit comprises three channel velocity sensors, three channel acceleration sensors and a channel hydrophone to collect several channel raw signals simultaneously, the channel raw signals comprising velocity signals, acceleration signals and hydrophone signals.
  3. 3. The submarine observation platform based on underwater acoustic communication according to claim 2, wherein the specific steps of generating the data to be discriminated are as follows: Preprocessing a multi-channel submarine original signal; Performing wavelet transformation processing on the preprocessed multi-channel submarine original signals, extracting time-frequency characteristics of the submarine original signals of all channels, and extracting energy characteristics of the submarine original signals of all channels in a preset dominant frequency band; based on time-frequency characteristics and energy characteristics of submarine original signals of each channel, a fusion characteristic vector is constructed And marked as data to be discriminated.
  4. 4. The underwater acoustic communication based cableless seafloor observation platform according to claim 1, characterized by the specific steps of generating target data as follows: Inputting the data to be discriminated into a lightweight neural network model to generate earthquake probability, namely ; Judging whether the earthquake probability is higher than a preset earthquake probability threshold value ; If the time stamp correlation is higher than the preset earthquake probability threshold value, the data to be distinguished is subjected to time stamp correlation, the preprocessed multichannel submarine original message corresponding to the data to be distinguished is positioned, and the multichannel submarine original message is marked as target data.
  5. 5. The underwater acoustic communication based cableless seafloor observation platform of claim 4 wherein the generation of the transmission bit stream versus the compressed data The specific steps of (a) are as follows: performing adaptive decomposition processing on target data by adopting wavelet packet transformation to generate compressed data; Error correction encoding of compressed data based on short code LDPC code to generate transmission bit stream for compressed data 。
  6. 6. The underwater acoustic communication based cableless seafloor observation platform of claim 5 wherein the modulated signal is generated The specific steps of transmitting to the target receiving end are as follows: Transmitting bit stream pair compressed data based on Orthogonal Frequency Division Multiplexing (OFDM) Performing modulation processing to generate a modulation signal ; The underwater acoustic transducer modulates a signal And performing conversion processing and transmitting to a target receiving end.
  7. 7. The underwater acoustic communication based cableless seafloor observation platform of claim 1, further comprising: Target receiving end pair-converts the processed modulation signal Performing reverse recovery processing; and the modulated signal after the reverse recovery processing is processed The seismic characteristic data can be used for earthquake phase identification, magnitude estimation or tsunami warning.
  8. 8. The underwater acoustic communication-based cableless seafloor observation platform according to claim 1, wherein the low-power-consumption sleep monitoring module of the embedded processing unit adopts a dynamic power consumption management mechanism that a main processor enters a deep sleep state during a non-event period, and only a low-power-consumption coprocessor monitors a trigger signal.

Description

Cable-free submarine observation platform based on underwater acoustic communication Technical Field The invention relates to the technical field of marine observation and underwater communication, in particular to a cable-free submarine observation platform based on underwater acoustic communication. Background Currently, submarine geophysical observation mainly depends on two types of systems, namely a cabled submarine observation network, such as Japanese DONET, canadian NEPTUNE and China submarine science observation network, and a self-contained cableless submarine seismograph, wherein a submerged OBS is widely used. The cable observation network realizes continuous power supply and high-bandwidth data feedback through the submarine photoelectric composite cable, has the advantages of good instantaneity, long observation period and the like, but has extremely high construction and maintenance cost and poor layout flexibility, and is difficult to rapidly deploy in wide deep open sea or sudden geological areas. In contrast, a submerged-floating OBS adopts a battery-powered, cableless design, and is settled to the sea bottom by gravity when laid, and is floated to the sea surface for recovery by acoustic instructions or timing release of ballast after the task is finished. The device is widely used for short-term seismic observation in scientific navigation, however, has fundamental limitations, such as not supporting real-time or quasi-real-time transmission of seismic data, that is, all seismic waveform data are stored in an internal solid-state memory and can be acquired after the device is physically recovered, and is difficult to be used for service scenes with extremely high time efficiency requirements such as earthquake early warning, tsunami rapid reporting and the like, and lacks of underwater sound communication capability or has extremely simple signaling function, that is, part of novel submerged OBS is integrated with an underwater sound transponder, but is only used for receiving and releasing ballast instructions or sending electric quantity, is successful in arrangement, and is difficult to transmit any effective seismic waveform or event characteristic. The limitations of the prior art at least comprise the following problems that the prior art is difficult to rapidly deploy in wide deep open sea or sudden geological areas, all data can be acquired after physical recovery equipment is needed, and timeliness requirements such as earthquake early warning, tsunami rapid reporting and the like are difficult to be met; the sensor is weak in configuration, most of the sensors lack hydrophones, the platform structure is not oriented to long-term business optimization, long-term continuous operation is difficult to support, and networking coordination capability is not achieved. In addition, the efficient compression and robust coding scheme is not designed aiming at the characteristics of the seismic signals, and the hardware module is independently designed and has high power consumption, so that effective data is difficult to stably transmit for a long time under the condition of no cable and low bandwidth. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a cable-free submarine observation platform based on underwater acoustic communication, which solves the problems that the prior art is lack of effective communication and is difficult to stably transmit for a long time. The submarine observation platform comprises a battery compartment unit, an earthquake unit, a sound communication unit, a communication ball unit and an embedded processing unit, wherein the battery compartment unit provides stable power supply for each unit, a main platform shell provides deep-open sea pressure-resistant protection for an internal unit, the earthquake unit is used for synchronously collecting multichannel submarine original signals, the embedded processing unit is a platform core control module and particularly comprises a low-power-consumption dormancy monitoring module, a signal processing module and an intelligent event judging module, the signal processing module receives the multichannel submarine original signals and performs feature extraction processing to generate data to be judged, the intelligent event judging module analyzes the data to be judged through a lightweight neural network model to generate target data, and the sound communication unit performs self-adaptive compression and channel coding processing on the target data to generate a transmission bit stream and compresses the dataThe communication ball unit is internally provided with an underwater acoustic transducer, and modulates the compressed data of the transmission bit stream to generate a modulation signalAnd transmitted to the target receiving end. Further, the seismic unit comprises a three-channel speed sensor, a three-channel acceleration sensor and a channel hydrophone, so that a plural