Sewing Machine Control for Marker Capture Without Projection Interference
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Solution Overview
Problem
Existing sewing machines face challenges in accurately capturing images of markers on a sewing workpiece due to the influence of projection images, leading to inaccurate sewing control when the marker position is changed.
Innovation Solution
A control device for a sewing machine that includes a controller to automatically switch between image capturing and projection states, ensuring these operations do not occur simultaneously, thereby reducing the influence of projection images on image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the projector projects a projection image onto the sewing workpiece during marker image capture, then the sewing pattern arrangement can be visualized, but the marker image cannot be accurately captured due to projection image interference
Solution Approach 1:
The control device alternates between projection execution state and projection non-execution state in periodic cycles. During marker image capture, the projector is switched to non-execution state to eliminate projection interference, allowing accurate marker detection. After capture, the projector resumes execution state to display the sewing pattern arrangement, achieving both accurate measurement and effective visualization at different time periods.
2Productivity
If the image sensor captures images continuously while the projector is active, then real-time feedback is available, but the captured images are degraded by projection light interference
Solution Approach 1:
The control device implements periodic switching between capture execution state and capture non-execution state synchronized with projection state changes. During brief capture execution windows when projection is inactive, the image sensor rapidly captures marker images with high quality. This periodic coordination ensures both efficient capture operations and high image quality by timing captures during projection-off periods.
3Extent of automation
If the projector and image sensor operate simultaneously, then the system is highly automated, but the sewing control accuracy deteriorates due to projection interference
Solution Approach 1:
The control device automatically coordinates the projector and image sensor through periodic state switching, eliminating the need for manual intervention. The system autonomously transitions between projection execution and non-execution states, and synchronously controls image sensor capture operations during appropriate windows. This automated periodic coordination maintains high extent of automation while ensuring manufacturing precision by preventing simultaneous operation conflicts.
Data Source
AI summary
A controller of a control device for a sewing machine changes a capture control state of an image sensor between a capture execution state of controlling the image sensor to perform image capturing and a capture non-execution state of controlling the image sensor to not perform image capturing, changes a projection control state of a projector between a projection execution state of controlling the projector to perform projection of a projection image and a projection non-execution state of controlling the projector to not perform projection of the projection image, and in a case where the projection control state is in the projection execution state and the capture control state changes from the capture non-execution state to the capture execution state, changes the projection control state from the projection execution state to the projection non-execution state.