Variable Size Visual Signal Projection for Bird Deterrence
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Solution Overview
Problem
Current visual scaring methods for avian species are ineffective due to rapid habituation and limited effectiveness on the ground and in varying weather conditions, particularly at airports where bird collisions with aircraft are a significant concern, and existing on-board systems have not proven satisfactory.
Innovation Solution
A method and device generating visual signals with images of variable size that simulate an approaching threat, including a series of signals such as eyes, black disks, and spirals, which are effective against different bird species and reduce habituation, and can be used on both the ground and on aircraft to deter birds from aircraft trajectories during critical flight phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional visual scaring devices (scarecrows, decoys, balloons, mirrors, light systems) are used, then birds can be deterred from areas, but birds rapidly habituate to these devices making them ineffective over time
Solution Approach 1:
The patent applies dynamics by using projected images of variable size that simulate an approaching threat. The image size dynamically changes over time, creating a looming effect that triggers birds' instinctive fear of predation. This dynamic visual stimulus prevents habituation because the threat appearance is continuously changing rather than static like conventional scarecrows or decoys.
Solution Approach 2:
The patent changes the parameter of image size over time to create the looming effect. By progressively increasing the image size to simulate approach, the system creates a time-varying visual stimulus that maintains bird deterrence effectiveness. This parameter change prevents birds from adapting to a constant stimulus.
2Reliability
If ground-based visual scaring devices are used, then birds can be deterred from ground areas, but they are ineffective for preventing bird collisions during flight phases
Solution Approach 1:
The patent achieves universality by making the visual scaring system adaptable to multiple platforms - it can be deployed on the ground or mounted on aircraft. This multi-functionality allows the same looming image technology to address bird safety across different contexts: ground area protection and in-flight collision prevention during approach, climb, and other critical phases.
Solution Approach 2:
The patent extends the application from ground-based two-dimensional operation to three-dimensional aerial deployment. By mounting the projection system on aircraft, the looming images can be presented to birds in flight paths, adding the vertical dimension and enabling protection during approach and climb phases where most collisions occur.
3Illumination intensity
If laser light signals are used for bird scaring, then visual stimuli can be provided, but effectiveness is limited during the day and in good weather conditions
Solution Approach 1:
The patent uses projection technology to create visual copies or representations of threatening images (such as predator faces or looming shapes) rather than relying on physical objects or laser beams. This projected imaging approach provides controlled, high-contrast visual stimuli that remain visible and effective across varying ambient light conditions and weather, unlike lasers whose effectiveness diminishes in daylight or poor weather.
Data Source
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AI summary
A device for visually scaring animal species, in particular bird species includes means for generating at least one visual signal including at least one image, varying in size over time, which simulates approach via an increase in the size of the image. For example, the visual signal includes one of the following images: eyes, a disc, and a spiral.