Photovoltaic Measurement Illumination Stability Control
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Solution Overview
Problem
Accurately measuring the properties of photovoltaic devices requires stable and homogeneous illumination, which existing technologies often fail to provide, leading to inconsistencies in the measured property curves.
Innovation Solution
A measuring device equipped with multiple light sources of different colors, a feedback controlling module, and a measurement unit that controls illumination to ensure instability is less than a predetermined ratio, using a PID controller to maintain stability and homogeneity, allowing for precise measurement of photovoltaic device properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing illumination systems are used for measuring photovoltaic device properties, then the measurement process can be performed, but the illumination stability and homogeneity are insufficient, leading to inconsistent measurement results
Solution Approach 1:
The patent implements a feedback control system using a light sensor to detect illumination intensity and feed this information back to a PID controller, which adjusts the light source output to maintain stable and homogeneous illumination during measurement
Solution Approach 2:
The patent employs a PID controller to dynamically adjust illumination parameters (intensity and distribution) based on real-time feedback, changing the operational parameters to achieve and maintain optimal illumination stability and homogeneity for accurate photovoltaic device measurement
2Measurement precision
If multiple light sources are used to improve illumination homogeneity, then measurement accuracy can be improved, but the device complexity increases
Solution Approach 1:
The patent divides the illumination system into multiple separate light sources (including different types such as LED and fluorescent lamps) positioned at different locations and orientations, with each light source contributing to the overall homogeneous illumination of the measurement area
Solution Approach 2:
The patent designs a multi-functional illumination system where different types of light sources serve multiple purposes: providing comprehensive spectral coverage, ensuring uniform illumination distribution, and enabling stable measurement conditions through coordinated operation of various lamp types
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 solution ensures accurate and consistent measurement of photovoltaic device properties by maintaining illumination stability and homogeneity, reducing sensing errors and manual adjustments, and enabling precise property curve acquisition.
Implementation Method 1
a feedback controlling module configured to control illumination of light emitted by the light sources
Implementation Method 2
A photovoltaic device may convert electromagnetic radiation into electricity
Data Source
AI summary
A measuring device for the property of a photovoltaic device and a measuring method using the same are provided. The measuring device includes several light sources and a feedback control module. The light color of each light source is different and includes several light-emitting elements symmetrically configured. The feedback control module is used for controlling illuminations of the light-emitting elements for measuring the property of a photovoltaic device.