Retrofittable Refrigerator Lock With Temperature-Based Access Control
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Solution Overview
Problem
Current refrigeration systems in hospitals lack security and temperature monitoring features, particularly for temperature-sensitive medications, narcotics, and vaccines, leading to potential misuse or degradation due to temperature fluctuations caused by power failures or improper door closure, with no comprehensive solution available to address these issues.
Innovation Solution
A retrofittable motorized latch and electronic access control system with temperature monitoring and programmable access control, allowing for differentiated access levels, alarm functionality, and data logging, ensuring secure storage and tracking of temperature-sensitive items by restricting access based on temperature parameters and alerting authorized personnel to temperature deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to small refrigerators for security, then access control is improved, but device complexity increases
Solution Approach 1:
The motorized latch assembly integrates multiple functions into a single device: it provides both security locking and temperature-based access control. The electronic access control circuit combines credential verification, temperature monitoring, and latch control in one integrated system, eliminating the need for separate mechanical locks and temperature sensors.
Solution Approach 2:
The patent replaces traditional mechanical locking mechanisms with an electronic motorized latch system. The latch is controlled by an electronic circuit that responds to credential verification and temperature conditions, substituting purely mechanical operation with electronically-controlled actuation through a motor driver.
2Reliability
If temperature monitoring and access control features are added to refrigeration systems, then medication safety is improved, but device complexity increases
Solution Approach 1:
The patent combines temperature monitoring, access control, and alarm functions into a single integrated system. The electronic access control circuit serves as a central hub that simultaneously monitors temperature via the transducer, verifies user credentials, controls the motorized latch, and triggers alarms, consolidating multiple safety features into one unified device.
Solution Approach 2:
The electronic access control circuit performs multiple functions: it verifies user credentials through the user interface, monitors temperature continuously via the transducer, controls the motorized latch assembly, and activates visual and audible alarms. This multi-functional approach improves medication safety without requiring separate independent systems for each function.
3Reliability
If restricted access based on temperature parameters is implemented, then temperature sensitivity protection is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically monitors temperature and independently determines when restricted access should be applied. The electronic access control circuit continuously reads temperature data from the transducer and automatically adjusts access permissions based on pre-programmed thresholds, eliminating the need for manual intervention or complex user decisions about temperature conditions.
Solution Approach 2:
The system implements automatic feedback control where the electronic access control circuit continuously monitors temperature via the transducer and adjusts access control decisions in real-time. When temperature exceeds safe parameters, the system automatically restricts access and activates alarms, providing continuous feedback-based protection without requiring user judgment or manual adjustment.
Data Source
AI summary
Disclosed are apparatus and methodology subject matters for temperature monitoring and controlled access to refrigerated medications. An electronically controlled lock is installed on a refrigerator used for storage of temperature sensitive medications. Lock access is given to individuals having differing levels of access authorization so that user level authorization holders may have access to stored medications. Supervisor level authorization holders may have access to stored medications and may also effect changes in lock settings including setting alarm levels. Alarm levels may be adjusted to monitor temperatures within the refrigerated storage area so that in the case that temperature fall outside preset limits, access to the stored medicines may be had only by those individuals having supervisory access authorization.