Wearable Alert Device for Time-Based Hand Hygiene Monitoring
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Solution Overview
Problem
Existing systems for ensuring hand-hygiene compliance in food handling industries do not adequately utilize time as a parameter to determine the frequency of handwashing, which is crucial for minimizing the risk of foodborne illnesses and maintaining regulatory compliance.
Innovation Solution
A dynamic real-time visual and haptic alert system that uses wearable devices and sensors to monitor hand-hygiene compliance based on time intervals, providing alerts and reminders to food handlers through lights, sounds, and vibrations, and integrating with computer systems for management oversight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing hand-hygiene monitoring systems are used, then handwashing detection is provided, but time-based compliance monitoring is not implemented
Solution Approach 1:
The patent changes the monitoring parameter from simple detection of handwashing events to tracking time intervals between handwashing events. The system monitors the duration since the last handwashing and triggers alerts when predetermined time thresholds are exceeded, thereby implementing time-based compliance monitoring that was missing in existing systems.
Solution Approach 2:
The system implements feedback by providing real-time notifications to food handlers when their handwashing interval exceeds the required threshold. The wearable device receives data from sensors and delivers timely feedback to users, enabling them to maintain compliance with handwashing frequency requirements.
2Reliability
If manual handwashing tracking is used, then operational simplicity is maintained, but compliance reliability is insufficient
Solution Approach 1:
The system enables self-service monitoring where the wearable device automatically tracks handwashing events through integrated sensors and autonomously determines compliance status. The device independently compares actual handwashing intervals against required thresholds and triggers alerts without requiring manual intervention or complex external monitoring infrastructure.
Solution Approach 2:
The wearable device performs multiple functions: it detects handwashing events, tracks time intervals, compares against compliance thresholds, and provides alerts. This multi-functionality consolidates what would otherwise require separate manual processes and monitoring systems into a single integrated device, improving reliability without proportionally increasing complexity.
3Object-affected harmful factors
If handwashing frequency is not monitored by time intervals, then system simplicity is maintained, but food safety risk increases
Solution Approach 1:
The system performs preliminary action by establishing predetermined time thresholds for handwashing compliance before monitoring begins. These pre-set intervals are based on food safety requirements, and the system proactively alerts users before they exceed the allowable time between handwashes, preventing contamination rather than merely detecting it after the fact.
Solution Approach 2:
The patent replaces manual mechanical tracking of handwashing intervals with automated electronic sensing and processing. Sensors detect handwashing events, microcontrollers calculate time intervals, and communication modules transmit alerts, substituting the manual mechanical process with an automated electronic system that reduces human error and ensures consistent enforcement of time-based compliance requirements.
Data Source
AI summary
The present invention relates to hardware, systems and software methods to insure compliance of personnel in jobs where sanitized hands are dependent on washing according to time intervals. The system includes a hand-hygiene station, a sanitizing dispensing device, a computer and a communication channel. A wearable vibration and visual alert device communicates, illuminates and vibrates dependent on timing between hand washing utilizing sensors positioned both adjacent to a hand washing station and installed in un-sanitized areas. Each of the plurality of sensors may be configured to provide a corresponding sensor output signal that is indicative of whether a person has washed their hands at a hand washing station.