CN-121977645-A - Real-time marine environment element monitoring system

CN121977645ACN 121977645 ACN121977645 ACN 121977645ACN-121977645-A

Abstract

The invention relates to the technical field of environment monitoring, in particular to a real-time marine environment element monitoring system which comprises an acquisition unit, a construction unit, a processing unit and a separation unit, wherein the acquisition unit is used for adapting to acquisition frequency according to ocean depth and combining threshold triggering with external instructions, environment data, node parameters and target signals are acquired in real time, the construction unit is used for simulating a refraction propagation path of an interference signal through ray acoustics, extracting signal characteristics and fusing multidimensional data to train an interference prediction model based on the data, the processing unit is used for outputting accurate interference results relative to the data input model, and the separation unit is used for combining the interference results and stripping the interference signals from the mixed signals through frequency domain conversion, dynamic filtering, time domain reconstruction and verification. The method realizes the accurate prediction and separation of the interference signals, remarkably improves the real-time performance, accuracy and reliability of marine environment element monitoring, and provides powerful technical support for marine resource development.

Inventors

HOU WENHAO
ZHU ZUHAO
HU XIAOWEI
HONG MING
HUANG SHIYING
SUN CHANGHAO

Assignees

自然资源部第四海洋研究所(中国—东盟国家海洋科技联合研发中心)

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (7)

1. Real-time marine environmental element monitoring system, characterized in that the system comprises: the acquisition unit is used for acquiring environmental data in a target ocean area in real time, node parameters of all monitoring nodes which are vertically deployed, and acquiring target signals required to be monitored by each monitoring node; the construction unit is used for constructing an interference prediction model according to the environmental data and the node parameters; the processing unit is used for inputting the environmental data, the node parameters and the target signals into the interference prediction model so as to output an interference result of the monitoring node; And the separation unit is used for separating the interference signal from the mixed signal through signal separation according to the mixed signal acquired by the monitoring node and combining the interference result so as to obtain a target signal which is required to be monitored by the monitoring node in the mixed signal.
2. The real-time marine environmental element monitoring system according to claim 1, wherein the collecting unit is configured to collect environmental data in a target marine field in real time, node parameters of all monitoring nodes deployed vertically, and collect target signals to be monitored by each monitoring node, specifically configured to: according to the depth data of the target ocean area, initial acquisition frequency is allocated to the monitoring node, and node parameters of the monitoring node are recorded according to the acquisition frequency; Presetting a target signal threshold and an environment data threshold, and when the monitoring node monitors the target signal threshold or the environment data threshold is triggered, automatically performing multiple adjustment on the acquisition frequency of the monitoring node to acquire node parameters; presetting a time interval, collecting target signals of the monitoring nodes according to the time interval, and automatically collecting the target signals corresponding to the regulated target signals when an instruction for externally regulating the monitoring targets is received.
3. The real-time marine environmental element monitoring system according to claim 1, wherein the construction unit is configured to construct an interference prediction model according to environmental data and node parameters, specifically configured to: Determining adjacent monitoring nodes of a target monitoring node in the vertical direction as interference sources, extracting characteristics of target signals of the target monitoring node and target signals of the adjacent monitoring node, and obtaining a target signal spectrum overlapping region according to the characteristics, wherein the characteristics comprise a frequency range, an amplitude fluctuation interval, a phase initial value and a spectrum peak value; acquiring layering medium parameters in the vertical direction of a target ocean area in real time, and acquiring dynamic three-dimensional coordinates of a target monitoring node and adjacent monitoring nodes through data fed back by the monitoring nodes in real time; According to the layered medium parameters and the dynamic three-dimensional coordinates, adopting ray acoustics to simulate refraction propagation paths of interference signals in different layered media, calculating real propagation lengths of the paths, and obtaining interference signal attenuation according to the real propagation lengths and the corresponding layered medium parameters, wherein the interference signals are target signals of adjacent monitoring nodes; According to the spectrum overlapping region of the target signal and the interference signal, extracting to obtain a difference characteristic, inputting the difference characteristic into a preset neural network model, and outputting a spectrum difference result of the target signal and the interference signal; and predicting to obtain a feature vector of the interference signal by fusing the interference signal attenuation amount and the spectrum difference result, and constructing to obtain an interference prediction model.
4. A real-time marine environmental element monitoring system according to claim 3, wherein the refraction propagation path of the ray acoustic simulation interference signal in different layered media is adopted according to the layered media parameters and the dynamic three-dimensional coordinates, and the real-time marine environmental element monitoring system is specifically used for: according to the layered medium parameters, respectively calculating the sound velocity value of each layered medium by adopting a Wilson formula; Setting the emitting direction of the sound ray of the interference signal according to the real-time vertical depth of the target monitoring node by taking the dynamic three-dimensional coordinates of the adjacent monitoring node as a starting point, and determining the emitting angle and the initial sound velocity of the sound ray; According to the sequence from the layered medium of the adjacent monitoring node to the layered medium of the target monitoring node, combining the sound velocity value, the emission direction, the emission angle of sound rays and the initial sound velocity, calculating the refraction angle of the sound rays of the interference signals in each layered medium layer by layer so as to determine the sound ray propagation track in the layered medium layer; Based on the sound ray propagation tracks determined in each layered medium, calculating to obtain the linear length of the sound ray propagation tracks, and accumulating the linear lengths of the sound ray propagation tracks of all the layered mediums to obtain the actual propagation length of the interference signals from the adjacent monitoring nodes to the target monitoring nodes; And obtaining refraction propagation paths of the interference signals in different layered media according to the refraction angles of the sound rays, the propagation tracks of the sound rays and the actual propagation lengths of the sound rays of the layered media.
5. The real-time marine environmental element monitoring system according to claim 3, wherein the feature vector of the interference signal is obtained by predicting by fusing the interference signal attenuation amount and the spectrum difference result, and the interference prediction model is constructed specifically for: Feature integration is carried out on the interference signal attenuation quantity and the spectrum difference result, and an input feature set is generated; Taking the feature set as input and the real interference feature as a label to train a lightweight neural network model; after the model receives new input data, predicting the amplitude, the phase and the spectrum distribution of the interference signal, generating a feature vector, and constructing to obtain an interference prediction model.
6. The real-time marine environmental element monitoring system according to claim 1, wherein the processing unit is configured to input environmental data, node parameters and target signals into the interference prediction model to output an interference result of the monitoring node, and is specifically configured to: Acquiring a real-time target signal of a target monitoring node, a layered medium parameter and a dynamic three-dimensional coordinate of the monitoring node; extracting characteristics of a target signal; inputting the characteristics, the layered medium parameters and the dynamic three-dimensional coordinates of the monitoring nodes into an interference prediction model, and outputting the characteristic vectors of interference signals; and obtaining an interference result based on the eigenvector analysis and outputting the interference result.
7. The real-time marine environmental element monitoring system according to claim 1, wherein the separation unit is configured to combine the interference result with the mixed signal collected by the monitoring node, and separate the interference signal from the mixed signal through signal separation, so as to obtain a target signal to be monitored by the monitoring node in the mixed signal, and specifically is configured to: Acquiring a mixed signal acquired by a monitoring node and an interference result output by an interference prediction model, wherein the interference result comprises frequency, amplitude, phase and interference intensity, and the mixed signal comprises a signal of a target monitoring node and a signal of an adjacent monitoring node; performing frequency domain conversion on the mixed signal to generate a spectrum of the mixed signal; Positioning a spectrum interval corresponding to an interference signal in a mixed signal spectrum map based on spectrum distribution characteristics in an interference result; combining the frequency, amplitude and phase parameters of the interference result to construct a separation filter, and carrying out filtering stripping on a frequency spectrum interval positioned in the mixed signal; Performing time domain reconstruction on the stripped mixed signal, and restoring the time domain characteristics of the mixed signal to obtain an initial target signal; And verifying the initial target signal based on the interference intensity in the interference result to obtain the target signal required to be monitored by the monitoring node.

Description

Real-time marine environment element monitoring system Technical Field The invention relates to the technical field of environment monitoring, in particular to a real-time marine environment element monitoring system. Background The marine environment is used as a complex environment with multiple layers and multiple factors and dynamic change, and the salinity, flow speed and other factors of the marine environment are changed in a gradient manner along with the ocean depth and also fluctuate at any moment due to the influences of weather, tide, runoff and the like. In order to realize reasonable development and efficient utilization of ocean resources, real-time and accurate monitoring of ocean environments is required. In the prior art, because the ocean is a continuous medium for signal conduction, signals such as sound waves, vibration, pressure change and the like can rapidly spread among different depths of the ocean, and nodes for collecting ocean environment data are basically various sensors. Environmental signals required to be captured by the nodes can propagate to other depths through seawater media, so that interference signals exist when the nodes at other depths acquire signals, and uneven layering exists on the media in the vertical direction of the ocean. The interference signal is refracted in different layers, so that the actual propagation distance is larger than the vertical distance between the nodes. The attenuation effect of the interference signal is positively correlated with the true propagation distance, the interference intensity when the interference signal is predicted is larger than the true value, and in addition, the frequency spectrums of the signals respectively collected among the nodes are overlapped, so that the interference signal and the target signal are difficult to distinguish, and therefore, direct analysis is difficult to obtain a reliable monitoring result according to the collected signals. Therefore, it is necessary to provide a real-time marine environmental element monitoring system to solve the above problems. Disclosure of Invention The invention aims to provide a real-time marine environment element monitoring system, which aims to solve the problems that the sea is a continuous medium for signal transmission, signals such as sound waves, vibration, pressure change and the like can be rapidly transmitted between different depths of the sea, the nodes for collecting marine environment data are basically various sensors, environmental signals required to be captured by the nodes can be transmitted to other depths through a seawater medium, further interference signals exist when the nodes at other depths collect the signals, the medium in the vertical direction of the sea is unevenly layered, the interference signals can be refracted in different layers, the actual transmission distance of the interference signals is larger than the vertical distance between the nodes, the attenuation effect of the interference signals is positively related to the actual transmission distance, the interference intensity when the interference signals are predicted is larger than the actual value, and in addition, the frequency spectrums of the signals collected respectively between the nodes are overlapped, so that the interference signals and target signals are difficult to distinguish, and direct analysis according to the collected signals is difficult to obtain a reliable monitoring result. In order to achieve the above purpose, the present invention provides the following technical solutions: A real-time marine environmental element monitoring system, the system comprising: the acquisition unit is used for acquiring environmental data in a target ocean area in real time, node parameters of all monitoring nodes which are vertically deployed, and acquiring target signals required to be monitored by each monitoring node; the construction unit is used for constructing an interference prediction model according to the environmental data and the node parameters; the processing unit is used for inputting the environmental data, the node parameters and the target signals into the interference prediction model so as to output an interference result of the monitoring node; And the separation unit is used for separating the interference signal from the mixed signal through signal separation according to the mixed signal acquired by the monitoring node and combining the interference result so as to obtain a target signal which is required to be monitored by the monitoring node in the mixed signal. Preferably, the collecting unit is configured to collect, in real time, environmental data in a target ocean area, node parameters of all monitoring nodes deployed vertically, and collect target signals required to be monitored by each monitoring node, and specifically is configured to: according to the depth data of the target ocean area, initial acquisition frequency is allocated to th