UV Lamp Control for High-Altitude Arc Prevention
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Solution Overview
Problem
UV lamps used for sanitizing aircraft cabins are susceptible to arcing due to decreased breakdown voltage at high altitudes, limiting their effectiveness in disinfection.
Innovation Solution
A system and method that includes a UV lamp with a control unit that adjusts power supply, blower operation, and electrode spacing based on ambient pressure and temperature to maintain a breakdown threshold above the arcing voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV lamps are operated at high altitudes with decreased ambient pressure, then the breakdown voltage decreases and arcing susceptibility increases, but the UV lamp cannot effectively sanitize components
Solution Approach 1:
The patent implements dynamic adjustment of electrode spacing based on ambient pressure conditions. At high altitudes where breakdown voltage decreases, the control system automatically increases the distance between electrodes to maintain adequate voltage margin and prevent arcing. This dynamic adaptation allows the UV lamp to operate reliably across varying pressure conditions while maintaining sanitization effectiveness.
Solution Approach 2:
The system changes operational parameters (electrode spacing, power supply voltage) in response to ambient pressure changes. By monitoring pressure and adjusting these parameters accordingly, the system maintains breakdown voltage above the arcing threshold while preserving UV output for effective sanitization at various altitudes.
2Reliability
If electrode spacing is increased to prevent arcing, then breakdown voltage increases and arcing is reduced, but the lamp structure becomes more complex
Solution Approach 1:
The control system automatically monitors ambient pressure and adjusts electrode spacing without requiring manual intervention. The system self-regulates by comparing real-time pressure data with predetermined thresholds and autonomously modifying electrode positioning to maintain optimal breakdown voltage margins, eliminating the need for complex manual adjustment mechanisms.
Solution Approach 2:
The system incorporates pressure sensors that continuously monitor ambient pressure and feed this information to the control unit. Based on this feedback, the control system dynamically adjusts electrode spacing to maintain adequate voltage margins. This closed-loop feedback mechanism simplifies the overall system by using electronic control rather than mechanically complex preset adjustment mechanisms.
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
Prevents or mitigates arcing in UV lamps, ensuring effective sanitization across varying altitudes by dynamically controlling power and environmental factors.
Implementation Method 1
A pressure sensor is configured to detect an ambient air pressure within the environment
Implementation Method 2
A temperature sensor is configured to detect an ambient air temperature within the environment
Implementation Method 3
one or more UV light emitters coupled to electrodes, wherein the UV light emitters are configured to emit UV light within an environment
Implementation Method 4
The control unit is configured to analyze the ambient air pressure and the ambient air temperature in relation to a breakdown voltage for the UV lamp
Data Source
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AI summary
A system (100) and method include an ultraviolet (UV) lamp (104) including one or more UV light emitters (106) coupled to electrodes. The UV light emitters (106) are configured to emit UV light (110) within an environment. A power source (114) is coupled to the UV lamp (104). The power source (114) is configured to supply power to the UV lamp (104). A pressure sensor (122) is configured to detect an ambient air pressure within the environment. A temperature sensor (126) is configured to detect an ambient air temperature within the environment. A control unit (118) is configured to analyze air pressure data regarding the ambient air pressure and air temperature data regarding the ambient air temperature in relation to a breakdown voltage for the UV lamp (104). The control unit (118) is further configured to modify at least one aspect of the UV lamp (104) in response to the ambient air pressure and the ambient air temperature reaching a breakdown threshold that is less than the breakdown voltage.