Multi-mode fusion positioning method and system for diving bell emergency communication

By employing a multimodal fusion positioning method and utilizing signal design and processing technology of underwater acoustic communication devices and positioning equipment, the problem of positioning and velocity measurement after the umbilical cable of a diving bell breaks has been solved, achieving high-precision positioning and velocity acquisition of the diving bell and improving emergency rescue efficiency.

CN121805950APending Publication Date: 2026-04-07CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719
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Patent Information

Application Number
CN202610030480.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-09
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

After the umbilical cable of a diving bell breaks, the existing underwater acoustic communication system and positioning beacon system are unable to accurately locate the three-dimensional coordinates of the diving bell and obtain its speed in real time in a high reverberation and strong noise environment, resulting in low efficiency and success rate of emergency rescue.

Method used

A multimodal fusion positioning method is adopted, which controls the underwater acoustic communication device to transmit continuous acoustic wave carrier signals and the emergency positioning device to transmit positioning pulse signals. Combined with a bistable random resonance system and an extended Kalman filter, signal separation, Doppler frequency shift analysis and data fusion are achieved to obtain the motion trajectory and position of the diving bell.

Benefits of technology

It significantly improved positioning and velocity measurement accuracy in high-noise environments, shortened rescue response time, increased the success rate of emergency rescue, and ensured the safety of divers.

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Abstract

The invention discloses a multi-mode fusion positioning method and system for diving bell emergency communication, and relates to the field of signal localization, and the method comprises the steps: collecting underwater mixed sound signals, and carrying out the spectrum analysis of the underwater mixed sound signals, and obtaining environment background noise characteristic parameters; inputting the underwater mixed sound signal into a preset bistable stochastic resonance system model, and adjusting a barrier height parameter of the bistable stochastic resonance system model according to the environmental background noise characteristic parameter to obtain an effective signal waveform after signal-to-noise ratio enhancement; performing signal separation on the effective signal waveform to obtain a continuous sound wave carrier signal and a positioning pulse signal; doppler frequency shift analysis is carried out on the continuous sound wave carrier signal to obtain a radial speed, and time arrival difference calculation is carried out on the positioning pulse signal to obtain a slant distance; and carrying out data fusion on the radial speed and the slope distance to obtain fused data, and obtaining a motion track and a current three-dimensional coordinate of the diving bell according to the fused data.
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