Inorganic Markers for Firearm Traceability via Infrared Fluorescence
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Solution Overview
Problem
Current methods for marking explosives, ammunition, and firearms are invasive, prone to removal or destruction, and lack traceability after use, making it difficult to identify the manufacturer and track the product's origin, which is crucial for investigative purposes and preventing illegal activities.
Innovation Solution
Development of inorganic markers, such as LaNbO4, BiVO4, and YNbO4 doped with rare earth ions, which are embedded within the explosives, gunpowder, or metal structures, allowing for identification via laser excitation in the infrared region, providing a non-invasive and permanent marking solution that survives detonation and use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If batch marking is used on firearms and ammunition, then manufacturing efficiency is improved, but traceability of individual products is lost
Solution Approach 1:
The patent applies local quality by embedding individual markers within specific locations of each product (firearm or ammunition item) rather than applying uniform batch markings. Each product receives a unique marker positioned at a specific location, enabling individual identification while maintaining efficient manufacturing processes. This resolves the contradiction by allowing batch production while preserving individual traceability through localized marker placement.
Solution Approach 2:
The patent introduces an intermediary marking system that acts as a mediator between the manufacturing process and traceability requirements. The marker serves as an intermediary element that can be embedded during manufacturing without interfering with the product's function, while providing the necessary identification information. This intermediary marker bridges the gap between efficient batch production and the need for individual product tracking.
2Ease of manufacture
If superficial markings are applied to firearms, then ease of manufacture is improved, but reliability of marking survival is worsened
Solution Approach 1:
The patent applies the nesting principle by embedding the marker within the internal structure of the firearm or ammunition, rather than placing it on the surface. The marker is nested deep within the metal matrix, surrounded by the material itself. This nested configuration ensures that the marker cannot be removed by superficial means such as scraping, while still allowing for easy identification through appropriate detection methods, thus resolving the contradiction between ease of manufacture and marking survival.
Solution Approach 2:
The patent utilizes composite materials by combining the marker material with the firearm or ammunition matrix to create a unified structure. The marker is embedded within the metal or composite material, creating a heterogeneous composite where the marker and base material work together. This composite approach ensures the marker's permanence while maintaining ease of manufacture through integrated embedding processes.
3Loss of information
If individual product marking is implemented, then traceability is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by designing a marking system that automatically provides traceability information without requiring complex external systems. The embedded marker contains encoded information about the product's origin and history, which can be read directly through appropriate detection methods. This self-contained approach eliminates the need for complex external tracking systems, resolving the contradiction by achieving traceability through the product itself rather than through complicated external infrastructure.
4Difficulty of detecting and measuring
If markers are made visible to the naked eye, then ease of detection is improved, but security against concealment is worsened
Solution Approach 1:
The patent replaces the mechanical/visual detection system with an optical or electromagnetic detection system. Instead of relying on visible markings that can be easily seen and potentially concealed, the system uses embedded markers that emit or reflect specific wavelengths of light or electromagnetic radiation. This substitution maintains ease of detection through specialized equipment while preventing concealment by the naked eye, as the markers require specific detection conditions to be perceived, thus resolving the contradiction between detection ease and security against concealment.
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 inorganic markers enable the tracing of the product's origin even after detonation or use, ensuring logistical and safety control, preventing fraud, and enhancing forensic analysis by remaining embedded and undetectable to the general public, thus maintaining the product's integrity and origin throughout its life cycle.
Implementation Method 1
allowing for identification via laser excitation in the infrared region
Implementation Method 2
The process for preparation and marking of explosives, fuses, and ammunition generally described below does not form part of the present invention. The same markers are used to mark steel and its alloys with application in firearms and metal projects, by carburizing or forging
Data Source
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AI summary
Consists of the development of different inorganic materials, having the capacity to generate visible colors when excited in the infrared region, which can be used to determine the origin of explosives, fuses and ammunition, even after detonation, and in weapons and metal projectiles, thus serving as a safety marking tool thereof. The following were developed: LaNbO4 (called Mark1), BiVO4, Sr3V2O8 and YNbO4 (called Mark2), doped with different rare earth ions (erbium, ytterbium, holmium and thulium). The markers were physically inserted inside the explosives and in the gunpowder and by carburizing and forging in steel or metal alloy, with which the weapon or metal projectile is manufactured. The parameter used to show the presence of the markers in the products, after detonation or scraping of the weapon, was the verification of the color identity of the marker fluorescence, before and after, via laser in the infrared region.