Optical Paint Line Fault Detection via Signal Intensity
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Solution Overview
Problem
Existing painting systems lack effective detection of contamination and faults, leading to quality defects in paint applications due to residual paint traces and air bubbles, which are not adequately flushed or pressurized, causing visual defects and inefficiencies in color change cycles.
Innovation Solution
The implementation of an optical sensing system using fiber optic cables and sensors to transmit and receive optical signals through transparent-walled conduits, allowing a processor to detect residual paint and air bubbles by comparing signal intensity, thereby facilitating thorough flushing and pressurization of the painting system components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional painting systems are used without optical detection, then the system complexity is low, but contamination and faults cannot be adequately detected, leading to paint quality defects
Solution Approach 1:
The patent replaces mechanical/visual inspection methods with an optical sensing system. Optical conduits transmit light through the paint lines, and optical sensors detect changes in light properties caused by contamination or air bubbles, enabling non-contact, automated fault detection without mechanical components.
Solution Approach 2:
The patent introduces optical conduits as intermediaries to transmit light through the paint delivery system. These conduits act as mediators between the light source and the paint, allowing indirect observation of paint quality without direct contact, thereby enabling detection while maintaining system integrity.
2Manufacturing precision
If thorough flushing is performed to remove residual paint, then paint quality improves, but the time required for color change cycles increases
Solution Approach 1:
The optical sensing system provides real-time feedback on the presence of residual paint or air bubbles in the paint lines. This feedback allows the system to monitor flushing effectiveness continuously and determine when flushing is complete, enabling precise control of the color change process and preventing both premature and excessive flushing operations.
Solution Approach 2:
The system performs preliminary detection of contamination or air bubbles before paint application begins. By detecting issues in advance during the flushing phase, the system can alert operators or automatically adjust parameters before defective paint reaches the applicator, preventing quality defects without requiring extended flushing times.
3Measurement precision
If optical sensing components are added to detect contamination, then fault detection capability improves, but the device complexity and cost increase
Solution Approach 1:
The optical sensing system is designed to perform multiple detection functions using a single integrated approach. The same optical conduits and sensors detect both residual paint and air bubbles, and can monitor multiple paint lines simultaneously, providing multi-functionality that reduces the need for separate detection systems for different contaminants.
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
This solution enables error-proofing of paint application processes, reducing paint defects by ensuring thorough cleaning and proper pressurization, thereby maintaining paint quality and preventing contamination during color changes.
Implementation Method 1
The isolation line may have an outer wall formed of a material that is at least partially transparent such that light is permitted to be transmitted through the outer wall
Implementation Method 2
a first optical conduit configured to transmit an optical signal through the outer wall
Implementation Method 3
a second optical conduit configured to receive a reflected optical signal generated by passing the optical signal through the isolation line
Data Source
AI summary
Example apparatuses and methods are provided for detecting a fault in a painting system. A fluid supply line such as a paint line or isolation line may have an outer wall formed of a material which permits light to be transmitted through the outer wall. First and second optical conduits may be provided, which are configured to transmit an optical signal through the outer wall and receive a reflected optical signal, respectively. An optical sensor may be in communication with the second optical conduit such that the optical sensor is configured to receive the reflected optical signal. A fault in the fluid supply line, e.g., traces of a previous color paint, air bubbles, or other contaminant, may be detected based upon a comparison of the received optical signal with the optical signal transmitted through the first optical conduit.