PV Module Load Testing with Pneumatic Suction Applicator
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Solution Overview
Problem
Existing load testing methods for photovoltaic modules are inefficient, inaccurate, time-consuming, and labor-intensive, particularly in achieving uniform load distribution and simulating various environmental loads such as wind, snow, and ice.
Innovation Solution
A mechanical load testing system utilizing an array of air cylinders, suction cups, and a vacuum pump, along with a controller and accelerometer, to apply and regulate pressure, detect cracks, and determine the threshold load capacity of photovoltaic modules, while simulating environmental conditions through temperature and pressure adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual loading methods with lead- or water-filled bags are used, then load testing can be performed, but the process becomes labor-intensive and time-consuming
Solution Approach 1:
The patent replaces manual mechanical loading operations with an automated pneumatic system. Air cylinders connected to suction cups provide automated application and removal of load forces, eliminating the need for manual handling of lead- or water-filled bags. The controller automates the entire testing sequence, significantly improving productivity and reducing labor requirements.
Solution Approach 2:
The patent employs pneumatic actuators (air cylinders) to generate and control the loading forces. The pneumatic system allows for precise, repeatable, and automated application of specified loads through controlled air pressure, replacing inefficient manual loading methods while maintaining accurate load control.
2Manufacturing precision
If manual loading methods are used, then load testing can be performed, but achieving uniform load distribution becomes difficult
Solution Approach 1:
The patent divides the loading system into multiple discrete suction cups that can be independently positioned and controlled. Each suction cup acts as an independent loading point, allowing the system to distribute load uniformly across multiple locations on the photovoltaic module. This segmented approach ensures even load distribution while simplifying the loading process through automation.
Solution Approach 2:
The automated pneumatic system replaces manual loading operations, ensuring consistent and uniform load distribution through programmed positioning and force application. The controller manages the coordination of multiple air cylinders and suction cups to achieve uniform loading across the module surface.
3Measurement precision
If traditional load testing methods are used, then basic load capacity can be assessed, but accurate determination of threshold load capacity is difficult
Solution Approach 1:
The patent incorporates accelerometers that continuously monitor the photovoltaic module's response to applied loads. The system provides feedback by detecting vibrations and movements that indicate approaching failure points. The controller uses this real-time feedback data to precisely determine the threshold load capacity, significantly improving measurement accuracy compared to traditional methods.
Solution Approach 2:
The patent employs optical sensors to detect visual changes in the photovoltaic module under load, such as color changes or deformations that indicate stress levels and potential failure points. This optical detection method enhances the precision of threshold load capacity determination by providing real-time visual feedback on module condition.
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 provides efficient, accurate, and automated load testing, enabling the determination of photovoltaic module load capacity and compliance with industry standards, reducing manual labor and time, and ensuring uniform load distribution and simulation of environmental loads.
Implementation Method 1
The pressure can include negative pressure applied to pull a photovoltaic module surface from the load test position in a direction toward the load test device
Implementation Method 2
The pressure can include positive pressure applied to push a photovoltaic module surface from the load test position in a direction away from the load test device
Data Source
AI summary
A system for determining load capacity for a photovoltaic module includes a clip to position a photovoltaic module surface at a load test position and a load test device proximate to the clip, including a pressure applicator and an actuator, wherein the actuator is capable of moving the pressure applicator toward the load test position.