Overboard Fall Detection Unit Continuous Beacon Notification
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Solution Overview
Problem
Existing methods for detecting an overboard fall of a ship crewperson may fail to maintain detection and notification when the person resurfaces, leading to potential missed rescues.
Innovation Solution
An overboard fall detection unit equipped with a water environment sensor, an overboard fall detection part, and an overboard fall notification part that transmits a continuous beacon signal via one-way communication to notify of the overboard fall information, even after the person resurfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two-way communication with pairing establishment is used for overboard fall detection, then communication reliability is improved, but detection continuity deteriorates when the crewperson resurfaces
Solution Approach 1:
The notification system is segmented into two independent parts: pairing establishment for initial communication reliability, and beacon signal transmission for continuous detection. The beacon signal operates independently as one-way communication that does not require pairing, allowing continuous operation even when two-way communication fails upon resurfacing.
Solution Approach 2:
The beacon signal acts as an intermediary mechanism that bridges the gap between initial detection and continuous notification. It carries overboard fall information independently without requiring the portable terminal or pairing establishment, serving as a reliable mediator for continuous detection.
2Duration of action of stationary object
If one-way beacon signal transmission is used for continuous notification, then detection continuity is improved, but communication reliability deteriorates without pairing establishment
Solution Approach 1:
Overboard fall information is written to the memory in advance during the pairing establishment phase. This preliminary action ensures that the beacon signal has the necessary information ready for continuous transmission without requiring real-time communication or pairing validation.
Solution Approach 2:
The beacon signal operates autonomously using stored overboard fall information from memory, serving itself without requiring external communication validation or pairing establishment. This self-service capability ensures continuous operation independent of communication reliability.
3Measurement precision
If pairing establishment is required for notification, then communication accuracy is improved, but notification timeliness deteriorates when the portable terminal is unavailable
Solution Approach 1:
The critical overboard fall information is extracted and stored in the memory during pairing establishment. This extraction allows the beacon signal to transmit notification independently without requiring the portable terminal, eliminating the time loss associated with terminal availability while maintaining accuracy through pre-stored validated information.
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
This solution ensures reliable detection and notification of an overboard fall, even after the crewperson resurfaces, thereby improving the chances of timely rescue.
Implementation Method 1
an overboard fall detection unit (U) equipped with a water environment sensor (1)
Data Source
AI summary
An overboard fall detection unit including: a water environment sensor that is equipped on a ship crewperson and that outputs water environment data around the ship crewperson; an overboard fall detection part that detects an overboard fall of the ship crewperson on the basis of the water environment data; and an overboard fall notification part that transmits a beacon signal that continuously notifies of overboard fall information related to the ship crewperson via one-way communication.