Fluorescent Indicator for Machine Vision Placement Verification
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Solution Overview
Problem
Existing methods for verifying the accurate placement of components on a work surface are prone to human error and ineffective due to lack of contrast between layers, especially when using machine vision, and are hindered by laser speckle at long distances.
Innovation Solution
A method utilizing a controller linked to an imaging device and an illumination system with fluorescent indicators that emit light at specific wavelengths, allowing the imaging device to distinguish the component from the work surface with high accuracy, eliminating the need for operator verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If machine vision is used to verify placement, then verification speed is improved, but detection accuracy deteriorates due to lack of contrast between layers
Solution Approach 1:
The patent applies fluorescent indicators that emit light at specific wavelengths when illuminated, creating visible contrast between the applique and work surface. The imaging device captures this fluorescent emission, enabling accurate detection of placement position and orientation without manual verification, thus resolving the contradiction between verification speed and detection accuracy.
2Measurement precision
If laser projector is used to verify placement, then measurement precision is improved, but image quality deteriorates due to laser speckle at long distances
Solution Approach 1:
The patent introduces fluorescent indicator material as an intermediary between the laser projector and imaging device. The laser illuminates the fluorescent indicator, which then emits light at a different wavelength that the imaging device can detect without suffering from laser speckle effects, thus maintaining measurement precision while improving imaging quality.
3Measurement precision
If operator verification is used, then detection accuracy is improved, but productivity deteriorates due to time consumption and human error
Solution Approach 1:
The patent replaces manual operator verification with an automated system combining laser illumination, fluorescent indicators, and machine vision. The imaging device captures images of the fluorescently marked applique, and software automatically verifies placement accuracy against CAD data, eliminating human error and time consumption while maintaining high detection accuracy.
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
Enables rapid and precise verification of component placement by providing clear contrast between the fluorescent indicator and the background, improving detection accuracy and reducing errors.
Implementation Method 1
An indicator is applied to the piece including light emission displaying fluorescent wavelengths when illuminated
Data Source
AI summary
A method of verifying placement of a piece on a work surface is disclosed. An imaging device and an illumination system are electronically interconnected with a computer. The illumination system projects indicia onto a work surface for indicating a location for placement of a piece on the work surface. An indicator is provided to the piece that includes light emission displaying fluorescent wavelengths when illuminated for distinguishing the piece form the work surface. The piece is placed upon the work surface at a location indicated by the laser indicia. The illumination system illuminates the piece presenting a visible contrast between the piece and the work surface enabling the imaging device to distinguish the piece from the work surface. The imaging device signals the controller a location of the piece for the controller to verify accurate placement of the piece.