Automated UV Door Handle Sterilization via Motion Sensor
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Solution Overview
Problem
Conventional sterilization methods in public areas, such as door handles and elevator buttons, are ineffective in maintaining sanitary conditions over extended periods, are costly, and pose health and environmental risks due to toxic cleaning agents, and often miss overlooked areas.
Innovation Solution
An automated sterilization system that uses optical energy, specifically ultraviolet and infrared light, emitted by sanitizing light elements positioned near high-touch surfaces, which is activated by a motion sensor detecting user interaction, ensuring surfaces are sanitized after each use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automated sterilization system with motion sensor is implemented, then sterilization effectiveness and coverage are improved, but device complexity increases
Solution Approach 1:
The sterilization system is divided into separate functional modules: a motion sensor unit for detection, a controller unit for processing signals and managing sterilization cycles, and sanitizing light elements for actual sterilization. This segmentation allows each component to be optimized independently while working together as an integrated system, improving overall reliability without requiring complete system redesign.
Solution Approach 2:
The motion sensor continuously monitors the area around the door handle and detects hand placement before contact occurs. The system prepares for sterilization by detecting the approach of a hand, then automatically initiates the sterilization cycle immediately after hand removal is detected, ensuring the surface is sanitized before the next user interacts with it.
2Productivity
If automated sterilization system is implemented, then labor costs are reduced, but initial system cost increases
Solution Approach 1:
The sterilization system operates autonomously by detecting user interaction through the motion sensor and automatically initiating sterilization cycles without requiring manual activation or monitoring. The controller manages the entire process, activating the sanitizing light elements when needed and ensuring consistent sterilization timing, thereby eliminating the need for manual cleaning labor while maintaining operational simplicity.
3Reliability
If sanitizing light elements are positioned close to handle, then sterilization coverage is improved, but risk of interfering with user interaction increases
Solution Approach 1:
The sanitizing light elements remain dormant during normal door operation and are activated only in periodic sterilization cycles triggered by motion sensor detection. This timing-based activation ensures the lights are positioned close to the handle for maximum sterilization coverage while remaining inactive during user interaction, thus avoiding any interference with normal door operation.
Solution Approach 2:
The motion sensor acts as an intermediary between user interaction and sterilization activation. It detects hand placement and removal without interfering with the physical interaction with the door handle, then communicates this information to the controller which manages the sterilization process, thereby mediating between user needs and sterilization requirements.
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 maintains a sterile surface by killing bacteria and viruses on high-touch areas, reducing the risk of disease transmission and environmental harm, while being cost-effective and ensuring thorough coverage without manual oversight.
Implementation Method 1
A motion sensor is configured to detect placement and removal of a hand of a user adjacent the opening mechanism
Implementation Method 2
The first sanitizing light element is sized, configured and adapted to emit a first optical sterilization signal toward the opening mechanism for sterilizing the opening mechanism
Data Source
AI summary
A sterilization system is configured to emit energy, such as UV radiation, for sterilizing a surface, such as a door handle, faucet handle, elevator button, or other target surfaces known in the art. The sterilization system is configured to operate automatically in response to detection of a user's hand interfacing with the handle. After a user releases a handle, the sterilization system is actuated to sanitize the handle for subsequent users.