Appearance Inspection Imaging Path Control to Reduce Motion Blur
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Solution Overview
Problem
Existing appearance inspection systems face challenges with subject blurring due to changes in the relative position between the imaging device and the object, leading to decreased inspection accuracy.
Innovation Solution
An appearance inspection system that includes a movement mechanism and control units to adjust the position and orientation of the imaging device along a designated path, ensuring that the relative movement between the imaging device's field of view and the inspection target position is canceled out, thereby reducing blurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the imaging device moves along a designated path to inspect multiple positions on the object, then the inspection coverage is improved, but subject blurring occurs due to relative position changes
Solution Approach 1:
The imaging device is made dynamically adjustable in position and orientation during the imaging process. The control unit changes the position and/or orientation of the imaging device in real-time to cancel out relative movement between the field of view and the inspection target position, thereby maintaining image sharpness while enabling multi-position inspection coverage.
Solution Approach 2:
The system incorporates feedback control where the control unit continuously monitors the relative position between the imaging device and the object, and adjusts the imaging device's position and orientation accordingly to cancel out unwanted relative movement during imaging, thus preventing subject blurring.
2Productivity
If the relative position between imaging device and object is changed during imaging, then inspection efficiency is improved, but image quality deteriorates due to subject blurring
Solution Approach 1:
The imaging device's position and orientation are dynamically adjusted during the imaging process to compensate for movement along the designated path. This dynamic control enables continuous movement for efficient inspection while maintaining stable imaging conditions to prevent blurring.
Solution Approach 2:
The control unit preemptively adjusts the imaging device's position and orientation to counteract the relative movement that would otherwise occur during imaging. By applying this preliminary anti-action, the system prevents subject blurring before it can occur, allowing efficient movement-based inspection.
3Measurement precision
If the imaging device remains stationary for high-quality imaging, then inspection accuracy is maintained, but inspection coverage is limited
Solution Approach 1:
The system transitions from a static imaging approach to a dynamic one where the imaging device can move along a designated path while its position and orientation are continuously adjusted. This enables the device to cover multiple inspection positions while maintaining accurate, blur-free images at each position.
Solution Approach 2:
The imaging device is designed to perform multiple functions: it can remain stationary for high-quality imaging of single positions, or move along a designated path while dynamically adjusting position and orientation to inspect multiple positions. This multi-functionality allows the system to adapt to different inspection requirements.
Data Source
AI summary
The disclosure provides an appearance inspection system that can reduce subject blurring when an object is imaged while changing a relative position of an imaging device with respect to the object. A first control unit causes the imaging device to perform imaging when the imaging device reaches an imaging position corresponding to the inspection target position. A second control unit changes at least one of the position and the orientation of the imaging device in a direction in which a relative movement between a field of view of the imaging device and the inspection target position according to the change in the relative position along a designated path is canceled out during a predetermined period including a time point at which the imaging device reaches the imaging position.