Firearm Safety System Using Shape Memory Actuator and RFID Authentication
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Solution Overview
Problem
Existing electronically controlled trigger locking mechanisms for firearms are vulnerable to tampering and may malfunction due to issues with solenoids and fingerprint authentication methods, which can be overridden or fail under dirty or damaged conditions.
Innovation Solution
An electronically controlled safety system (ECSS) that incorporates a shape memory actuator module, radio frequency identification (RFID) module, and a control module, using an RFID tag for authentication and a shape memory wire to immobilize the trigger mechanism, providing enhanced security and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If solenoids are used to lock the trigger mechanism, then the device can be actuated electrically, but the system becomes vulnerable to magnetic tampering
Solution Approach 1:
The patent replaces the solenoid (electromagnetic actuator) with a shape memory alloy wire actuator. The shape memory wire responds to electrical current by changing its physical shape/length, mechanically actuating the locking interface without using electromagnetic fields that could be disrupted by external magnets. This substitution maintains electrical actuation capability while eliminating vulnerability to magnetic tampering.
2Ease of operation
If fingerprint scanners are used for authentication, then user verification can be performed, but the system may malfunction when fingers are dirty or injured
Solution Approach 1:
The patent replaces the optical/biological fingerprint scanning system with an RFID (radio frequency identification) authentication system. The RFID tag, worn by the authorized user, communicates wirelessly with the reader in the firearm system, enabling user verification without physical contact. This substitution eliminates reliability issues associated with dirty or injured fingers while maintaining convenient user verification.
3Reliability
If RFID authentication is implemented, then authentication speed and reliability improve, but the device complexity increases
Solution Approach 1:
The patent integrates the RFID reader, control logic, and shape memory wire actuator into a unified authentication and actuation system. The RFID reader serves dual purposes: authenticating the user and triggering the actuation sequence. The control module combines authentication verification and actuator control functions. This multi-functional integration reduces overall system complexity despite adding RFID capability.
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 ECSS prevents unauthorized discharge and ensures reliable operation by using an RFID tag for secure authentication and a shape memory actuator to lock the trigger mechanism, offering improved safety and resistance to tampering.
Implementation Method 1
a shape memory actuator module comprising at least one shape memory wire and a mechanical locking interface actuated by at least one shape memory wire
Implementation Method 2
a radio frequency identification module comprising a radio frequency identification reader configured to send a radio frequency interrogation signal and to receive a predetermined activation code; a radio frequency identification tag configured to transmit the certain predetermined activation code when subjected to the radio frequency identification reader's interrogation signal
Data Source
AI summary
The present device is an electronically controlled safety system for use in firearms comprising a shape memory actuator configured to connect a mechanical locking interface to a trigger mechanism interface comprising a point of connection to a firearm's trigger mechanism. This shape memory actuator can be controlled by use of an authentication system comprising an RFID module and a control module. The user of the firearm can provide authorization to place the firearm in the armed position by placing an RFID tag having a certain activation code near the RFID module, which can then activate the shape memory actuator through the control module. When the mechanical locking interface is connected to the trigger mechanism interface a firearm's trigger mechanism is locked in place and the firearm is in a safe position and when it is not connected to the trigger mechanism it is in an armed position.