Directional Sonic Drone Mitigation via Propeller Resonance
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Solution Overview
Problem
The increasing use of vertical propeller-driven drones for surveillance has led to unauthorized intrusions into private and industrial areas, violating privacy rights, and existing methods to mitigate these intrusions often violate local regulations by using firearms.
Innovation Solution
The use of directional sonic devices and fluid flow systems to destabilize drone propellers, causing instability in flight, thereby deterring the drone or causing it to crash, without affecting other airborne objects or individuals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If firearms are used to mitigate drone intrusions, then the immediate threat is neutralized, but local governmental rules and FAA regulations are violated
Solution Approach 1:
The patent replaces the mechanical system of firearms with an acoustic system (sonic device) to achieve drone mitigation. The sonic device generates sound waves at frequencies that resonate with drone propeller blades, causing destabilization without violating regulations, thus substituting a harmful mechanical approach with a regulated acoustic approach.
Solution Approach 2:
The patent introduces sound waves as an intermediary between the mitigation system and the drone. Rather than direct mechanical or ballistic interaction, the sonic device uses acoustic energy as a mediator to transfer destabilizing forces to the drone propellers, enabling regulation-compliant mitigation.
2Reliability
If sonic energy is used to destabilize drone propellers, then drone flight stability is compromised, but other airborne objects may be affected
Solution Approach 1:
The patent applies local quality by directing sonic energy specifically at the drone propeller blades rather than using omnidirectional sound. The system targets the specific frequency and location of the propellers, creating localized destabilization effects that do not propagate to affect other airborne objects in the vicinity.
Solution Approach 2:
The patent exploits mechanical vibration by generating sound waves at resonant frequencies that match the natural frequency of drone propeller blades. This causes excessive vibration and flutter in the propellers, destabilizing the drone without producing broad-spectrum noise that would affect other objects.
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
Effectively deters drones from unauthorized areas without violating local regulations, ensuring privacy rights while minimizing risks to other airspace users.
Implementation Method 1
This sonic device produces a compression soundwave, which is either narrow in frequency, or broadband, such that it produces one or more resonant frequencies on the drone propeller or propellers
Implementation Method 2
This sonic device produces a compression soundwave
Implementation Method 3
the device constitutes a highly directional fluid flow, much like a squirt gun, that contains either non-Newtonian or viscous liquid. Upon impacting the propeller or motor system
Data Source
AI summary
Systems and methods for drone mitigation, or the deterrence of aerial drones from flying in an given area, are described. The systems and methods take advantage of the fact that destabilization of a drone can be accomplished by externally changing the performance of one or more of its propeller driven systems. In doing so, the drone is incapable of maintaining stability in flight, thereby causing the remote controlled pilot to force a retreat, or risk and result in a crash of the drone. Embodiments utilizing sonic energy and liquids are described.