Marine Beacon Conductivity Activation
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Solution Overview
Problem
Existing locating beacons in marine data recorder systems are prone to premature activation due to constant wetting, leading to reduced battery life and signal strength, as they are activated by direct liquid contact, which does not comply with standard depths and requires complex constructions to prevent this.
Innovation Solution
A locating beacon using AC voltage with a controller that measures conductivity and only activates the signal emission after a defined threshold is consistently exceeded, featuring a ceramic coating to prevent deposits and using rechargeable batteries for extended life, and a controller that confirms multiple threshold violations before emitting a pulsed or continuous ultrasonic signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locating beacon uses direct contact with liquid to activate signal emission, then the activation is simple and reliable, but the beacon is prematurely activated by spray or cleaning liquids, reducing battery life and signal strength
Solution Approach 1:
The patent changes the activation parameter from simple liquid contact detection to conductivity threshold detection. The controller measures the conductivity of the liquid contacting the poles and compares it against a predefined threshold, ensuring activation only occurs when sufficient conductivity (indicating genuine water immersion) is detected, not from spray or cleaning liquids.
Solution Approach 2:
The patent replaces the mechanical/electrical simple contact switch with an electronic conductivity measurement system. Instead of using a mechanical switch that closes upon any liquid contact, the system uses electrical conductivity measurement through the liquid path between two poles, providing intelligent discrimination between genuine immersion and incidental contact.
2Reliability
If the locating beacon is activated at shallow water depths to meet standards, then compliance is achieved, but unnecessary battery discharge occurs outside emergency situations
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors conductivity measurements and compares them against threshold criteria. The system only transitions to signal emission when the conductivity threshold is exceeded and maintained for a defined period, providing feedback-based verification that prevents premature or false activation while ensuring genuine emergency situations are detected.
Solution Approach 2:
The patent performs preliminary conductivity measurements and threshold verification before activating signal emission. The controller evaluates multiple conductivity readings over time to confirm genuine water immersion before committing to battery-powered signal transmission, ensuring that activation occurs only when truly necessary.
3Reliability
If a pressure-sensitive membrane is used to prevent premature activation, then false activation is reduced, but the switch design becomes significantly more complex
Solution Approach 1:
The patent replaces the mechanical pressure-sensitive membrane with an electrical conductivity measurement system. Instead of using a mechanical membrane that requires physical pressure to activate, the system uses electrical measurement through liquid conductivity, achieving the same protective function with simpler electronic components and no moving parts.
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
The solution effectively prevents unnecessary battery discharge outside emergency situations, ensuring the beacon remains activated only in deep water, maintaining signal strength and compliance with standards, while being easy to manufacture and maintain.
Implementation Method 1
the voltage at the poles is applied as alternating voltage... the conductivity of the ambient medium at the poles is first measured
Implementation Method 2
begins to emit an ultrasonic signal over a period of several days to weeks. This signal is detected by salvage vessels equipped with appropriate tracking devices
Data Source
AI summary
Disclosed is a location beacon (25), especially for use in marine data recorder systems, comprising a housing (11), an activation unit for emitting signals, particularly ultrasonic signals, at least two poles (27) for measuring the conductivity of liquids, and a power supply unit. In order to render said location beacon (25) simple and durable, an alternating current is applied to the poles (27), and the activation unit is controlled by a controller. A corresponding method is also disclosed.