Gunshot Sensor Evaluation Device Using Acoustic and Infrared Simulation
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Solution Overview
Problem
Existing gunshot detection systems face challenges in accurately and quickly detecting indoor gunshots due to interference from environmental and man-made sources, and require a non-disruptive method for testing sensor functionality without actually firing a gun.
Innovation Solution
A gunshot sensor evaluation device that includes an acoustic generator and an infrared generator, capable of simulating acoustic and infrared stimuli, is used to test the sensors in a controlled and quiet manner, reducing disruption and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gunshot detection systems are used in indoor environments, then gunshot detection capability is provided, but environmental interference and false positives increase
Solution Approach 1:
The detection system segments the gunshot signal into multiple characteristic features (acoustic waveform patterns, infrared temporal profiles, frequency spectrum characteristics) and evaluates each separately before making a detection decision. This segmentation allows the system to distinguish genuine gunshot patterns from environmental interference more effectively.
Solution Approach 2:
The patent introduces an intermediary analysis layer that processes raw sensor data before final detection. This intermediary layer applies signal processing algorithms and pattern recognition to filter out environmental noise and identify characteristic gunshot features, acting as a mediator between the sensors and the detection decision.
2Reliability
If actual gunshot testing is performed to verify sensor functionality, then sensor operation is confirmed, but environmental disruption and safety risks increase
Solution Approach 1:
The patent uses acoustic generators and infrared generators to create copies of gunshot signals for testing purposes. These generated signals replicate the acoustic and infrared characteristics of actual gunshots without requiring real firearm discharge, enabling safe and controlled sensor verification.
Solution Approach 2:
The patent replaces the mechanical system of actual firearm discharge with electronic signal generation systems. Acoustic generators produce test acoustic signals and infrared generators produce test infrared signals, substituting the dangerous mechanical gunshot mechanism with safe electronic alternatives for testing purposes.
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 device allows for convenient, in-situ testing of gunshot sensors, ensuring proper operation without disrupting the environment, and enhances the accuracy of indoor gunshot detection systems by simulating realistic stimuli while minimizing false positives.
Implementation Method 1
an acoustic generator, used in testing of a gunshot sensor
Implementation Method 2
an infrared generator used in testing the gunshot sensor
Data Source
AI summary
Techniques for gunshot sensor testing are disclosed. An acoustic generator and infrared generator are disposed in a housing. Soundproofing insulation is distributed around and/or within the housing to provide sound deadening which minimizes disturbance to building occupants during testing. The housing is placed in proximity to a gunshot sensor. A trigger device enables multiple modes of triggering both the acoustic generator and infrared generator. The generators stimulate corresponding components of a gunshot sensor. Input from the gunshot sensor components is evaluated to determine an operating condition of the gunshot sensor. The gunshot sensor verifies its operation by communicating with a server. The server further tests mass communication channels by issuing a test message. The test results indicative of the condition of the gunshot sensor are sent to a mobile device for an operator to review.