Work Machine Component Mounter Chromatic Aberration Correction
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Solution Overview
Problem
The existing imaging units, such as those described in Patent Literature 1, require a separate off-line imaging device to acquire the appropriate resolution for correcting chromatic aberration, leading to increased manufacturing efforts and costs.
Innovation Solution
A work machine, specifically a component mounter, is equipped with a part camera and a control device that can capture images of components using light sources of different wavelengths, allowing for in-line correction of chromatic aberration without the need for a separate device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate off-line imaging device is used to acquire resolution data for chromatic aberration correction, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the imaging function and chromatic aberration correction function into a single integrated imaging unit. The imaging device captures images at multiple wavelengths, and the correction unit processes these images to correct chromatic aberration, eliminating the need for a separate off-line imaging device while maintaining measurement precision.
Solution Approach 2:
The imaging unit is designed to perform multiple functions: capturing images at different wavelengths, measuring resolution, and providing data for chromatic aberration correction. This multi-functional design reduces the need for separate specialized devices while maintaining the required measurement precision.
2Measurement precision
If a separate off-line imaging device is used to acquire resolution data, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the imaging and correction functions into one system, reducing the total number of components that need to be manufactured and assembled. This integration lowers manufacturing costs while maintaining the precision required for chromatic aberration correction.
Solution Approach 2:
The imaging unit serves itself by capturing its own images at multiple wavelengths and providing the data needed for its own chromatic aberration correction. This self-service capability eliminates the need for separate calibration equipment, reducing manufacturing costs.
3Adaptability or versatility
If multiple light sources with different wavelengths are used for imaging, then chromatic aberration correction capability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple light sources with different wavelengths into a single imaging unit, along with the correction unit that processes images from these light sources. This integration manages the complexity by unifying the multi-wavelength imaging and correction functions in one system.
Solution Approach 2:
The correction unit acts as an intermediary that receives images from the multi-wavelength light sources and processes them to correct chromatic aberration. This intermediary component manages the complexity by providing a unified processing interface for multiple wavelength inputs.
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 the correction of chromatic aberration in images of components directly on the work machine, reducing manufacturing costs and eliminating the need for a separate imaging device.
Implementation Method 1
an imaging device that images a component
Implementation Method 2
light sources of different wavelengths
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A work machine includes an imaging device, a holding head having a component holder, a moving device configured to move the holding head in at least a horizontal direction, a lighting device configured to apply irradiation light having different wavelengths from multiple light sources toward the component holder, and a control device, in which the control device includes an imaging command section configured to command the imaging device to irradiate the component holder with light having different wavelengths to capture an image of the component holder, a first calculation section configured to calculate, based on any one captured image among captured images obtained by the imaging command section for respective light beams having different wavelengths, a resolution of the captured image, a second calculation section configured to calculate a lens center of the imaging device based on the captured images for the respective light beams having different wavelengths, and a storage section configured to store a difference between the lens center calculated by the second calculation section and a camera center of the imaging device as a unique value of the imaging device.