Monitoring system and monitoring method

The monitoring system uses sound wave-based transmitters and receivers to overcome the limitations of existing methods, enabling cost-effective and accurate seaweed bed monitoring by measuring water depth and length, facilitating real-time growth analysis.

JP2026085850APending Publication Date: 2026-05-25PENTA OCEAN CONSTRUCTION CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
PENTA OCEAN CONSTRUCTION CO LTD
Filing Date
2025-08-18
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing methods for monitoring kelp forests, such as underwater surveys, shipboard surveys, and aerial imaging, are costly, limited by turbidity, and face issues with lens obstruction and difficulty in quantifying growth, making frequent and accurate monitoring challenging.

Method used

A monitoring system using transmitters and receivers that emit and receive sound waves to measure water depth and length of seaweed, allowing for quantitative monitoring by calculating the difference in water depth between fixed points on the seaweed and a reference point, with transmitters having specific gravity adjusted for growth direction to maintain position.

Benefits of technology

Enables frequent, low-cost, and easy quantitative monitoring of seaweed beds, unaffected by turbidity and lens obstruction, with real-time data recording for growth analysis.

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Abstract

To enable quantitative monitoring of seaweed beds at high frequency, low cost, and in a simple manner. [Solution] The monitoring system (100) includes a first transmitter (1) attached to the growth-direction end of a monitoring target (S) within a measurement target area (A) and emitting sound waves (W1) including depth information indicating at least the depth at the attachment point; at least one receiver (2) that receives sound waves W1 from the first transmitter; a transmitter (3) that transmits depth information from the first transmitter each time the receiver receives sound waves; and a measuring unit (441) that measures the length of the monitoring target based on the depth information from the transmitter.
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