LED Light Head Temperature Control During Resin Curing
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Solution Overview
Problem
The challenge with using LEDs to cure resin in cured-in-place piping operations is the uneven distribution of light energy, leading to overheating and potential damage due to waste heat, which conventional cooling methods like air supply may not adequately address, especially under high ambient conditions.
Innovation Solution
A temperature regulation system that varies the power output and travel rate of the light source to maintain optimal LED temperature, incorporating a controller that monitors and adjusts power and speed based on predefined thresholds to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-energy light sources are used to cure resin, then curing efficiency is improved, but temperature increases causing overheating
Solution Approach 1:
The system dynamically adjusts the power output of the light source based on real-time temperature feedback. The controller modifies operational parameters during the curing process to maintain optimal temperature, preventing overheating while ensuring effective resin curing.
Solution Approach 2:
Temperature sensors continuously monitor the light source and surrounding areas, providing feedback to the controller. The controller uses this feedback to regulate power delivery, creating a closed-loop control system that balances curing efficiency with thermal management.
2Productivity
If light source moves at high rate of travel, then productivity is improved, but temperature accumulation increases
Solution Approach 1:
The system dynamically adjusts the rate of travel based on temperature conditions. When temperature approaches thresholds, the controller reduces the rate of travel to allow heat dissipation, then gradually increases it again once cooling occurs, maintaining productivity while preventing overheating.
Solution Approach 2:
The system implements periodic adjustments in operation, alternating between higher productivity modes and cooling periods. This periodic variation in rate of travel allows the light source to complete curing tasks while periodically dissipating accumulated heat.
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
Effectively prevents LED overheating by dynamically adjusting power and speed, ensuring consistent resin curing without damaging the LEDs, even under varying environmental conditions.
Implementation Method 1
The light source and the power line are configured to extend within the liner when the liner is in the elongated configuration
Implementation Method 2
high-energy light sources used to cure resin
Implementation Method 3
The controller is configured to monitor a temperature of an area adjacent the light emitting diodes
Data Source
AI summary
A system for regulating the temperature of a light source positioned within a liner soaked in resin and installed within an underground pipeline. The system measures the temperature of light emitting diodes supported on the light source as the light source is pulled through the liner to cure the resin. The system is configured to automatically stop the curing process and subsequently step down the power level and the rate of travel of the light source each time a designated temperature threshold is reached. Power is indefinity shut down to the light source if a maximum temperature is reached.