Aquatic Tracking Tag with pH-Sensitive Material for Predation Detection
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Solution Overview
Problem
Current tracking tags for marine animals fail to distinguish between the tag being implanted in an animal and the tag being consumed by a predator, leading to incorrect data on the predator's movement.
Innovation Solution
A tracking tag with a pH-sensitive material that degrades in acidic environments, such as a predator's gut, causing a detectable change that triggers a sensor to adjust its operation and signal a predation event, allowing for accurate detection of predation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the tracking tag continues to transmit ultrasonic pulses after being consumed by a predator, then the tag remains operational and transmits data, but the data becomes misleading as it represents predator movement rather than the original animal's movement
Solution Approach 1:
The patent applies preliminary action by pre-attaching a pH-sensitive material to the tracking tag before deployment. This material is designed to degrade specifically in acidic environments (pH < 6.5), which are characteristic of predator digestive systems. The preliminary preparation of this pH-sensitive component enables the tag to automatically detect and respond to predation events through environmental pH changes, thereby resolving the contradiction between continued operation and data reliability.
Solution Approach 2:
The pH-sensitive material serves as an intermediary element between the tracking tag and the acidic predator gut environment. This intermediary component translates the chemical environment (pH level) into a detectable physical change (material degradation), which then triggers the tag to switch from transmission mode to predation detection mode. This intermediary mechanism allows the tag to distinguish between normal operational conditions and predation conditions, maintaining data reliability while preserving operational capability.
2Measurement precision
If the tracking tag is designed to detect predation events, then accurate predation data can be obtained, but additional sensors and materials are required increasing device complexity
Solution Approach 1:
The patent utilizes parameter changes by monitoring pH level transitions in the environment surrounding the tag. Instead of adding complex predation detection hardware, the system leverages the natural pH parameter difference between the neutral/basic coelomic cavity (pH 7.0-8.0) and the acidic predator gut (pH < 6.5). The pH-sensitive material translates this parameter change into a detectable signal, achieving accurate predation detection while minimizing additional device complexity.
Solution Approach 2:
The patent replaces potential mechanical or electronic predation detection systems with a chemical-based pH sensing mechanism. Rather than using complex sensors to detect physical signs of predation, the system uses the chemical property (pH) of the environment to trigger detection. This substitution simplifies the overall device architecture while maintaining high measurement precision for predation event detection.
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
Enables the tracking tag to differentiate between being in an animal's body and being consumed, providing accurate data on predation events and preventing misinterpretation of predator movement.
Implementation Method 1
the pH sensitive material degrading in the presence of an acidic environment
Implementation Method 2
a transducer for transmitting an ultrasonic signal based on at least the detection of the characteristic of the tag by the sensor
Data Source
AI summary
A tracking tag for aquatic animals may detect the occurrence of a predation event. The tag may include a pH sensitive material that degrades in the environment of an animal's gut. The degradation of the pH sensitive material causes a change in a detectable characteristic of the tag, which allows the tag to detect the predation event and adjust its operation accordingly.