Calibration-Access Shield for Weathering Test Sensors
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Solution Overview
Problem
Conventional accelerated weathering apparatuses face issues with sensor accuracy, operator safety, and accessibility, as they require opening the apparatus door to access sensors, leading to potential UV exposure, sensor alignment problems, and corrosion of connectors, while existing solutions either damage sensitive electronics or violate safety regulations.
Innovation Solution
An accelerated weathering apparatus with a calibration-access assembly that allows sensor access without opening the door, using a shield mechanism to expose sensors externally while the door is closed, ensuring operator safety and preventing UV exposure, and maintaining sensor accuracy through ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the apparatus door is opened to access sensors for calibration, then operator safety is compromised due to UV exposure, but sensor accessibility is improved
Solution Approach 1:
The door is segmented into a main door structure and a separate shield assembly with apertures. The shield can be independently moved to expose or cover sensor apertures without requiring the main door to be opened, thus allowing sensor access while maintaining UV protection through the closed door structure
Solution Approach 2:
A shield assembly acts as an intermediary between the operator and the UV radiation source. The shield with its movable apertures allows selective exposure of sensors for calibration while blocking UV radiation from reaching the operator, mediating between the need for sensor access and operator protection
2Reliability
If the apparatus door is opened to access sensors, then connector corrosion is prevented, but sensor alignment accuracy deteriorates
Solution Approach 1:
The sensor access function is segmented from the door opening function. The shield assembly provides a dedicated aperture mechanism that maintains the door in a closed position while allowing sensor exposure, thus preserving both connector durability and sensor alignment accuracy through consistent positioning relative to the light source
3Object-affected harmful factors
If sensors are made accessible through the door, then operator safety is maintained, but device complexity increases
Solution Approach 1:
The shield assembly serves multiple functions: it acts as a UV blocking barrier when closed, provides a mechanism for selective sensor exposure through movable apertures, and maintains structural integration with the door. This multi-functionality allows UV protection and sensor accessibility without requiring separate complex systems
Data Source
AI summary
An apparatus for accelerating the weathering effects on test specimens within a test chamber including a calibration-access assembly for replacing test sensors located within the apparatus with reference sensors when the apparatus door is closed. An improved sensor support assembly is also included. The calibration-access assembly from an improved location, facilitating superior irradiance detection. The calibration-access assembly including an aperture defined in the door of the apparatus and a shield connected to the door that is movable to permit or prevent access to sensors when the apparatus door is closed.