Robot Liquid Application Thickness Control
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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 with a liquid application part, an application thickness measurement part, a distance measurement part, and a control part that maintains a constant distance between the liquid application part and the substrate, while adjusting the liquid supply based on measured thickness, ensuring uniform application.
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 thickness measurement sensor measures the actual liquid application thickness in real-time, and this measurement is fed back to a control unit that adjusts the liquid supply amount accordingly. This closed-loop feedback mechanism ensures uniform liquid application thickness despite variations in ambient temperature, liquid remaining amount, or internal pressure, directly resolving the technical contradiction between manufacturing precision and device complexity by providing intelligent compensation through measurement and adjustment
Solution Approach 2:
The patent dynamically changes the liquid supply parameter (supply amount) based on real-time thickness measurements and environmental conditions. The control unit adjusts the liquid supply rate or pressure as a variable parameter to compensate for ambient temperature changes and other affecting factors, transforming a static application process into a dynamic adaptive process that maintains consistent thickness uniformity
2Manufacturing precision
If the distance between the liquid application part and the substrate is not maintained constant, then the ease of operation is improved, but the manufacturing precision of liquid application thickness deteriorates due to substrate undulation
Solution Approach 1:
The patent employs a distance measurement sensor that continuously measures the distance between the liquid application part and the substrate surface, providing real-time feedback to the control unit. This feedback enables the system to automatically adjust the robot's positioning or the application part's height to maintain a constant distance, thereby ensuring uniform liquid application thickness even on undulating substrates while automating the positioning process to maintain ease of operation
Solution Approach 2:
The patent introduces dynamic adjustment capability where the distance between the liquid application part and the substrate is not fixed but can be actively adjusted in real-time based on substrate undulation. The system transitions from a static positioning approach to a dynamic one where the application part automatically adapts its position to maintain optimal spacing, ensuring consistent application thickness across varying substrate geometries
3Manufacturing precision
If ambient temperature changes are not compensated, then the device complexity is reduced, but the manufacturing precision of liquid application thickness deteriorates due to temperature-induced viscosity changes and pressure variations
Solution Approach 1:
The patent incorporates temperature sensing and compensation where a temperature sensor monitors ambient temperature changes, and this information is fed back to the control unit which adjusts the liquid supply parameters accordingly. This feedback mechanism compensates for temperature-induced viscosity changes and pressure variations, maintaining consistent liquid application thickness without requiring complex environmental control infrastructure
Solution Approach 2:
The patent adjusts the liquid supply parameters (such as supply rate or pressure) as variable parameters in response to ambient temperature changes. The control unit modifies these parameters dynamically to compensate for temperature effects on liquid viscosity and system pressure, transforming a temperature-sensitive process into a temperature-compensated process that maintains precision across varying environmental conditions
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 achieves real-time control of liquid application thickness, maintaining uniformity even with changes in ambient conditions, reducing costs by using reflective sensors for measurement.
Implementation Method 1
a distance measurement part measuring a first distance from the distance measurement part to an application object
Implementation Method 2
an application thickness measurement part measuring an application thickness of a liquid applied by the liquid application part
Data Source
AI summary
A robot system and a control method of a robot are provided. The robot system includes a robot, a liquid application part being provided on the robot, an application thickness measurement part measuring an application thickness of a liquid applied by the liquid application part, a distance measurement part measuring a first distance from the distance measurement part to an application object, a control part controlling the robot based on the first distance so that a second distance from the liquid application part to the application object becomes constant, a supply amount adjustment part adjusting a supply amount of the liquid to the application object according to the application thickness measured by the application thickness measurement part, wherein the distance measurement part, the liquid application part and the application thickness measurement part are arranged in this order in an application direction of the liquid.