Underwater Optical Communication Positioning Against Sunlight Interference

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing underwater optical communication systems face challenges with communication quality due to high-intensity disturbance light, such as sunlight, which can cause communication failure.

Innovation Solution

The system includes a first optical communication device and a second optical communication device, both equipped with light emitters and receivers, and a control device that provides recommended and unrecommended relative positions based on disturbance light information to optimize communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the light receiver receives communication light underwater, then optical communication can be performed, but disturbance light such as sunlight deteriorates communication quality

Engineering Contradiction:

Improvecommunication qualityVSAvoiddisturbance light influence

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by making the light receiver's sensitivity selective to specific wavelengths. The receiver is designed to preferentially receive communication light at predetermined wavelengths while rejecting disturbance light at other wavelengths, thereby improving communication quality without blocking useful signals

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system performs preliminary action by pre-establishing wavelength allocation before communication begins. The communication light is assigned specific wavelengths in advance, and the light receiver is configured to detect only these predetermined wavelengths, preventing disturbance light interference before it affects communication

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

By positioning the second optical communication device according to the recommended relative position, the system can maintain good optical communication quality and prevent communication failures caused by disturbance light.

Implementation Method 1

a first light emitter and a first light receiver; a second light emitter and a second light receiver

Methodology Applied

Scientific EffectLight emission: Light

Implementation Method 2

receiving communication light emitted from the first optical communication device by using the second optical communication device

Methodology Applied

Scientific EffectLight detection: Photoelectric Effect

Data Source

PatentEP4550695A1Underwater optical communication system and underwater optical communication method

Publication Date: 2025.05.07 SHIMADZU CORP

Figure 1
Figure 2~3
Figure 4~5

AI summary

An underwater optical communication system (1) according to this invention includes a first optical communication device (10) arranged underwater; a second optical communication device (20) being provided to a moving body (3) for moving underwater, and performing bidirectional optical communication between the second optical communication device and the first optical communication device (10); and a control device (30) for presenting at least one of a recommended relative position (41) and an unrecommended relative position (42) of at least the second optical communication device (20) relative to the first optical communication device (10) in the optical communication based on disturbance light.