Robot Liquid Application Thickness Control via Real-Time Feedback
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Solution Overview
Problem
Existing robot systems fail to control the application thickness of liquids on substrates effectively due to factors like ambient temperature changes, substrate undulation, and internal pressure variations, leading to non-uniform layer thickness.
Innovation Solution
A robot system equipped with a liquid application part, an application thickness measurement part, and a control part that adjusts the distance between the liquid application part and the substrate based on measured thickness, moving closer for excess liquid and further for insufficient liquid to maintain a uniform layer thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a robot is used to apply liquid to a substrate without real-time thickness control, then the device complexity is reduced, but the manufacturing precision of liquid application thickness deteriorates due to ambient temperature changes, remaining amount of liquid, and pressure variations
Solution Approach 1:
The patent implements a feedback control system where a sensor measures the actual liquid application thickness in real-time, and the control unit adjusts the liquid application amount based on the difference between the measured thickness and target thickness. This closed-loop feedback mechanism maintains manufacturing precision without requiring overly complex manual intervention systems.
Solution Approach 2:
The system performs self-adjustment by automatically modifying the liquid application parameters based on real-time sensor feedback. The control unit autonomously compensates for variations in ambient temperature, liquid remaining amount, and internal pressure without external intervention, enabling the system to maintain precision while keeping the control architecture relatively simple.
2Manufacturing precision
If the distance between the liquid application part and the substrate is fixed, then the device complexity is reduced, but the manufacturing precision deteriorates when substrate undulation or ambient conditions change
Solution Approach 1:
The patent employs dynamic adjustment of the liquid application distance based on real-time feedback from the sensor. The control unit continuously modifies the distance between the liquid application part and substrate to compensate for substrate undulation and maintain uniform liquid thickness, transforming a static system into a dynamically adaptive one.
Solution Approach 2:
The system changes the physical parameter of application distance in response to measured thickness variations. By dynamically adjusting this parameter based on feedback, the system maintains consistent liquid application quality despite changes in substrate geometry or environmental conditions.
3Manufacturing precision
If real-time measurement and adjustment of liquid application thickness is implemented, then the manufacturing precision is improved, but the productivity decreases due to additional measurement and control steps
Solution Approach 1:
The patent implements continuous real-time measurement and adjustment during the liquid application process itself, rather than performing separate measurement and correction steps. The sensor operates continuously during application, and adjustments are made on-the-fly, maintaining production flow without interrupting the useful action of liquid deposition.
Solution Approach 2:
The feedback control operates in real-time during the application process, allowing immediate correction of thickness variations without requiring post-processing or multiple passes. This enables the system to maintain high precision while preserving productivity by eliminating the need for repeated applications or manual adjustments.
Data Source
AI summary
A robot system and a control method of a robot are provided. A robot, a liquid application part, an application thickness measurement part and a control part are provided, the liquid application part being provided on the robot, the application thickness measurement part measuring an application thickness of a liquid applied by the liquid application part, the control part, in a case where the application thickness measured by the application thickness measurement part is greater than a predetermined thickness, driving the robot in a manner of moving the liquid application part closer to an application object, and in a case where the application thickness measured by the application thickness measurement part is less than the predetermined thickness, driving the robot in a manner of moving the liquid application part away from the application object.