Wearable Sensor Collar for Projectile Source Detection
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Solution Overview
Problem
Existing systems face challenges in accurately locating the source of gunfire or projectiles, especially in environments with echoes or obstructions, and at long distances, where the noise is reduced, making it difficult for individuals to detect the direction of the threat.
Innovation Solution
A user-wearable sensor array system comprising multiple sensors, including microphones and pressure transducers, supported by a collar that provides a 360-degree detection field of view, integrated with a vest and an inertial measurement unit to detect muzzle blasts and shockwaves, allowing for precise determination of the projectile source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used to detect gunfire, then the device complexity is reduced, but the measurement precision of projectile source location deteriorates
Solution Approach 1:
The system divides the detection function into multiple sensors distributed around the user's neck, with each sensor responsible for detecting acoustic events from specific directions. This segmentation enables 360-degree coverage and improves source location precision while keeping each individual sensor simple
Solution Approach 2:
The patent transitions from single-point detection to three-dimensional spatial detection by arranging sensors in a distributed configuration around the neck. This dimensional expansion allows the system to determine both azimuth and elevation of projectile sources, significantly improving measurement precision
2Area of stationary object
If sensors are distributed over large distances to detect gunfire, then the detection field of view is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple sensors and their support structures into a single integrated collar device that wears around the user's neck. This merging approach provides 360-degree detection coverage while consolidating the physical form factor, thereby reducing overall device complexity despite the distributed sensor arrangement
Solution Approach 2:
The collar structure serves multiple functions: it supports the sensors, provides structural integrity, enables 360-degree detection coverage, and can be worn comfortably by the user. This multi-functionality reduces the need for separate components, thereby reducing device complexity while maintaining extensive detection coverage
3Difficulty of detecting and measuring
If microphones are used to detect gunfire noise, then the detection capability is improved, but the reliability deteriorates in environments with echoes and obstructions
Solution Approach 1:
The system segments the acoustic detection task across multiple microphones positioned at different locations around the neck. By comparing signals from multiple segments, the system can distinguish direct gunfire sounds from echoes and determine source direction more reliably, even in complex acoustic environments
Solution Approach 2:
The system uses feedback from multiple sensor inputs to continuously refine its determination of projectile source location. By analyzing the timing and intensity of acoustic signals from different microphone positions, the system can correct for environmental factors like echoes and obstructions, thereby improving reliability
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 system effectively enhances the ability to detect and locate the source of gunfire or projectiles in challenging environments by providing a comprehensive and accurate detection field, improving situational awareness and safety for soldiers and the public.
Implementation Method 1
a plurality of sensors configured to detect at least one of sound waves and pressure waves caused by at least one of the muzzle blast and shockwave of a projectile
Implementation Method 2
a plurality of sensors configured to detect at least one of sound waves and pressure waves caused by at least one of the muzzle blast and shockwave of a projectile
Data Source
AI summary
User-wearable sensor arrays for use with projectile-detection systems, and methods of detecting a projectile with user-wearable sensor arrays.