Bite Indicator Signal Processing for False Alarm Discrimination
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Solution Overview
Problem
Bite indicators commonly trigger false alarms due to environmental conditions, making it difficult for anglers to set sensitivity correctly and potentially missing genuine bites.
Innovation Solution
A bite indicator that uses a stylus to detect vibrations in the fishing line, with a signal processing system that measures acceleration and compares signals over time to generate an alarm only when a predetermined threshold is exceeded, reducing false alarms by analyzing behavioral patterns such as acceleration, velocity changes, and cadence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensitivity threshold is set low to detect genuine bites, then bite detection capability is improved, but false alarms increase due to environmental conditions
Solution Approach 1:
The system dynamically adjusts the detection threshold based on ambient conditions. The processor monitors environmental factors and automatically modifies the sensitivity threshold to distinguish genuine bites from environmental disturbances, resolving the contradiction between detecting all bites and avoiding false alarms
Solution Approach 2:
The system incorporates feedback mechanisms where the processor analyzes the pattern, duration, and intensity of detected signals. By comparing current signals with historical data and ambient conditions, the system provides feedback to adjust threshold settings, enabling reliable bite detection while filtering out environmental noise
2Object-generated harmful factors
If the sensitivity threshold is set high to reduce false alarms, then false alarm rate is reduced, but genuine bites are missed
Solution Approach 1:
The detection threshold is not fixed but dynamically adjusted based on real-time environmental monitoring. When environmental conditions suggest high noise levels, the threshold adjusts to prevent false alarms; when conditions are calm, the threshold lowers to detect subtle genuine bites, thus resolving the contradiction
Solution Approach 2:
The system changes detection parameters (threshold values, time windows, signal filtering settings) based on environmental conditions and signal patterns. This adaptive parameter adjustment allows the system to maintain high detection reliability while minimizing false alarms across varying conditions
3Measurement precision
If the alarm triggers on any line movement to ensure detection, then detection sensitivity is improved, but false alarms increase due to water movement and weather
Solution Approach 1:
The detection process is segmented into multiple analysis stages: initial signal detection, pattern recognition, duration verification, and environmental context analysis. Only signals that pass all segmentation stages trigger an alarm, enabling high detection sensitivity while filtering environmental false alarms
Solution Approach 2:
The system applies partial action by requiring only certain characteristics of line movement (specific patterns, durations, or acceleration profiles) to trigger alarms, rather than responding to all movements. This selective response maintains high detection sensitivity for genuine bites while ignoring environmental disturbances
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 effectively discriminates between genuine bites and environmental movements, reducing false alarms and allowing anglers to set sensitivity levels that accurately detect bites while minimizing missed catches.
Implementation Method 1
a sensing means for sensing movement of the stylus; wherein the stylus is arranged to contact a fishing line such that movement of the fishing line relative to the stylus causes the stylus to vibrate and the sensing means senses the vibrations and transmits a signal to the signal processing means
Data Source
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AI summary
A bite indicator 10 comprises a detecting/monitoring unit 18 comprising a housing 12 including guide means 16 through which the fishing line is retained and guided on or towards a stylus 14. In use, the fishing line is urged towards the stylus 14 such that movement of the fishing line causes vibrational movement within the stylus 14. The stylus 14 is mounted within the housing 12 of the bite indicator 10. The bite indicator 10 includes sensing means which is arranged to sense the motion and specifically the vibration of the stylus 14 and the sensing means produces an electrical signal in relation to the vibrational movement of the stylus 14. Control means of the bite indicator 10 is arranged to monitor the movement of the stylus 14 and to selectively generate an alarm signal. The present invention monitors the behaviour of the detected signal over a period of time to trigger a bite alarm rather than solely detecting a signal value above a baseline threshold (or other single set value) to trigger a bite alarm. For example, the detection of the velocity of the fishing line above a set value may not be sufficient to trigger an alarm. The present invention may require the velocity to be above the threshold for a set length of time before an alarm is triggered. Similarly, the alarm may be triggered if a change in the velocity is detected within a period of time (which may indicate an acceleration of the fishing line). Furthermore, the cadence may be detected and used to trigger the alarm and such a behavioural pattern may be demonstrated by repetitive stop-start movements of the fishing line. Accordingly the present invention discriminates against general movement of the fishing line as compared to an actual bite.