Pivotable Arm Access Control for MRI Safety
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Solution Overview
Problem
Current methods for controlling access to MRI suites and similar hazardous areas are inadequate, as they either fail to prevent unauthorized entry of ferromagnetic objects, leading to projectile accidents, or isolate the room, disrupting communication and workflow.
Innovation Solution
A room access control system featuring a pivotable arm with illuminated warning indicia that can be deployed across the doorway, providing a physical barrier and clear warnings without isolating the room, and can be remotely activated to minimize disruption to workflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locked chain or retractable belt is used across the doorway, then unauthorized access is prevented, but the locking and unlocking becomes tedious and the chain may remain unlocked
Solution Approach 1:
The patent replaces manual mechanical locking systems (chains, belts) with an automated electromagnetic locking mechanism. The door lock assembly includes an electromagnetic lock that can be remotely activated to engage the door, eliminating the need for manual locking and unlocking operations. This substitution provides reliable access control while maintaining operational convenience through remote activation capability.
2Reliability
If the door is closed or locked to prevent unauthorized access, then safety is improved, but communication between individuals inside and outside the room is prevented
Solution Approach 1:
The patent segments the door system into multiple functional components: a transparent or translucent door panel that allows visual communication, an electromagnetic locking mechanism for security, and a remote activation system. The door can be locked while maintaining visual transparency, enabling communication between interior and exterior while preserving safety. The segmented design allows simultaneous achievement of both security and communication requirements.
3Loss of information
If warning signs are posted above doors, then awareness of restricted access is improved, but the signs can be easily ignored
Solution Approach 1:
The patent incorporates illuminated warning indicators that change color or illuminate to provide visual warnings of restricted access and active locking states. The door assembly includes LED indicators or illuminated panels that display warning messages or status information, making the warnings impossible to ignore. This enhances both warning communication effectiveness and overall access control reliability through attention-grabbing visual signals.
4Reliability
If a physical barrier is deployed across the doorway, then unauthorized entry is prevented, but the barrier may obstruct legitimate access when not needed
Solution Approach 1:
The patent employs a dynamic door locking system where the electromagnetic lock can be remotely activated or deactivated based on operational requirements. The locking mechanism transitions between locked and unlocked states as needed, providing reliable access control when hazardous activities are occurring while allowing free access during safe periods. This dynamic control prevents unnecessary obstruction of legitimate workflow while maintaining security when required.
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 prevents unauthorized entry of ferromagnetic objects, enhances safety for MRI technicians and patients by clearly communicating the danger, and allows for continuous communication and workflow without interrupting the MRI process.
Implementation Method 1
the system deploys a physical barrier to prevent entry into the room
Implementation Method 2
illuminated warning indicia positioned on the arm
Data Source
AI summary
A room access control system including a base attachable to a wall or door jamb adjacent a door opening to a room, an arm having a first end pivotally mounted to the base and having a second end, illuminated warning indicia positioned on the arm,wherein the arm is positionable in a first position wherein the arm is in a generally vertical, undeployed position with the second end of the arm positioned above a floor located beneath the base and adjacent the door opening, andwherein the arm is pivotable from the first, generally vertical undeployed position, to a second generally horizontal, deployed position, where the arm extends across the door opening.