Adjustable Solar Mirror Array for Weathering Irradiance Control
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Solution Overview
Problem
Existing outdoor accelerated weathering test devices struggle to control temperature and irradiance fluctuations due to fixed mirror configurations, leading to inconsistent exposure of test specimens to solar radiation, which complicates maintaining desired temperature and irradiance levels.
Innovation Solution
The apparatus features a reflector device with independently positionable mirrors that can be adjusted between operative and inoperative positions to control the amount of solar radiation focused on test specimens, allowing for precise adjustment of temperature and irradiance levels based on input, using a controller to facilitate this movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed mirror configurations are used in outdoor accelerated weathering test devices, then the device structure is simple, but temperature and irradiance fluctuations cannot be controlled, leading to inconsistent exposure of test specimens
Solution Approach 1:
The patent applies the dynamics principle by making the mirror configuration adjustable rather than fixed. Each mirror can be independently positioned between operative and inoperative states, allowing the system to dynamically adapt to different testing requirements and maintain consistent temperature and irradiance levels on test specimens despite varying solar conditions.
Solution Approach 2:
The patent applies segmentation by dividing the reflector device into multiple independently controllable mirrors. This allows selective activation of individual mirrors to precisely control the total irradiance and temperature on test specimens, enabling fine-grained adjustment of exposure conditions.
2Adaptability or versatility
If independently positionable mirrors are used to control solar radiation, then temperature and irradiance levels can be precisely adjusted, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts mirror positions based on real-time solar conditions and testing requirements. The controller receives input signals and automatically positions mirrors to achieve desired temperature and irradiance levels, providing adaptability without requiring manual intervention.
Solution Approach 2:
The system incorporates feedback mechanisms that allow it to self-regulate. The controller monitors temperature and irradiance conditions and automatically adjusts mirror positions to maintain desired testing parameters, reducing the need for external control and simplifying operation.
3Productivity
If all mirrors are kept in operative position to maximize solar radiation, then the weathering test intensity is high, but temperature fluctuations become difficult to control
Solution Approach 1:
The system applies partial action by selectively activating only the necessary number of mirrors to achieve the desired test intensity. Rather than keeping all mirrors operative, the controller adjusts the exact number and positioning of active mirrors to maintain optimal temperature stability while providing sufficient solar radiation for accelerated weathering testing.
Solution Approach 2:
The system changes operational parameters by adjusting mirror positions and configurations based on real-time temperature and irradiance measurements. This allows dynamic modification of solar radiation intensity to maintain consistent testing conditions while preserving test acceleration effectiveness.
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
This solution enables consistent maintenance of desired temperature and irradiance levels on test specimens, reducing temperature fluctuations and ensuring accurate simulation of seasonal and daily variations in solar radiation, thereby improving the reliability of accelerated weathering tests.
Implementation Method 1
The reflector device is configured to reflect and concentrate solar radiation onto the at least one test specimen
Implementation Method 2
a Fresnel-reflecting solar concentrator having a series of ten flat mirrors which focus natural sunlight onto a series of test specimens
Implementation Method 3
An air deflector causes air escaping from the air tunnel to be circulated across the test specimens mounted to the target board to prevent the test specimens from overheating
Implementation Method 4
water spray nozzles are provided proximate to target board for wetting the test samples at periodic intervals to simulate the weathering effects of humidity, dew, rain, etc.
Data Source
AI summary
An accelerated weathering test apparatus including a target board operatively coupled to a reflector device. The target board is configured to support at least one test specimen for exposure to concentrated solar radiation. The reflector device is configured to reflect and concentrate solar radiation onto the at least one test specimen. The reflector device includes a bed and a plurality of mirrors. Each mirror is disposed on the bed in one of a first operative position, where solar radiation is reflected on the at least one test specimen, and a second operative position, where no solar radiation is reflected on the at least one test specimen. One of the irradiance incident on the at least one test specimen from the reflector device and the temperature of the at least one test specimen is adjustable by movement of selected mirrors from the first operative position to the second operative position in response to an input in order to control one of a temperature of the at least one test specimen or the irradiance.