Laser Drying Module With Closed-Loop Power Control for Coated Strips
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Solution Overview
Problem
Existing drying methods for coated pole pieces, such as hot air or infrared lamps, lack precision in controlling heating power for specific areas, leading to drying defects and safety hazards due to high temperatures from infrared lamps.
Innovation Solution
A laser drying device with a module of semiconductor laser units, a position sensor, and a control system that uses a closed-loop control algorithm to adjust the output power of each laser unit based on real-time drying performance data from sensors, ensuring precise drying and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If infrared lamps are used for drying, then drying effect is achieved, but surface temperature becomes too high causing safety hazards
Solution Approach 1:
The patent changes the drying method from infrared lamp heating to laser heating, fundamentally altering the thermal parameters. Lasers provide concentrated heating with controllable temperature distribution, avoiding the excessive surface temperature of infrared lamps while maintaining effective drying. The laser parameters (power, wavelength, scanning speed) can be precisely adjusted to achieve safe operating temperatures.
Solution Approach 2:
The patent applies local quality by using laser beams to provide localized heating only where needed on the coating surface. Unlike infrared lamps that heat the entire surface uniformly, lasers can target specific areas with varying power levels, concentrating energy precisely on wet regions while keeping surrounding areas at safe temperatures.
2Manufacturing precision
If same heating power is applied to entire surface, then drying process is simplified, but drying performance of specific areas cannot be controlled
Solution Approach 1:
The patent segments the heating function by dividing the coating surface into multiple zones, each receiving customized laser heating parameters. The laser system is divided into multiple independent laser units, each可控 independently to provide different heating powers to different areas based on their specific drying requirements.
Solution Approach 2:
The patent implements dynamic control where laser heating parameters are continuously adjusted based on real-time feedback from sensors. The system transitions from static uniform heating to dynamic adaptive heating, where power levels, scanning speeds, and beam positions are continuously modified to optimize drying performance across different areas.
3Productivity
If high temperature is used for drying, then drying speed is improved, but solvent NMP may explode
Solution Approach 1:
The patent changes the thermal field distribution from high-temperature uniform heating to low-temperature concentrated heating. Laser heating provides intense energy locally to accelerate evaporation without raising the overall temperature of the coating or solvent to explosive levels. The parameters are optimized to achieve fast drying through concentrated energy rather than high temperature.
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 enables accurate and safe drying of coated areas by precisely controlling the laser power and dissipating heat, preventing overheating and ensuring consistent drying performance across different areas.
Implementation Method 1
the laser drying module includes semiconductor laser units arranged in an array
Implementation Method 2
after a pole piece or diaphragm is coated, it needs to be dried
Implementation Method 3
the sensor module includes a sensor and a sensor driving unit, wherein the sensor is slidably connected to the sensor driving unit
Implementation Method 4
the laser drying module further includes a heat dissipation duct, laser cable ducts, a quartz glass plate and a housing
Data Source
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AI summary
Disclosed is a laser drying device and a laser drying method, and relates to the technical field of coating. The laser drying device includes a laser drying module, a position sensor, a sensor module and a control system; the laser drying module includes semiconductor laser units arranged in an array and electrically connected to the control system; the sensor module includes a sensor and a sensor driving unit, wherein the sensor is slidably connected to the sensor driving unit, the sensor driving unit is positioned on a side of the laser drying module; and the position sensor is placed at an edge of a strip to detect a position of the edge of the strip. The precision of drying is effectively ensured, and the safety of production is also ensured.