Multi-View Imaging for Shielded Component Mounting
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Solution Overview
Problem
Existing component mounting devices face challenges in accurately determining the mounting position of components on a substrate when shields, such as other electronic components, obstruct the camera's field of view, leading to unreliable imaging and mounting verification.
Innovation Solution
A component mounting device equipped with a mounting head and an imaging unit capable of capturing the mounting position from multiple fields of view with different imaging directions, allowing a controller to select the field of view least affected by shielding, thereby ensuring accurate determination of component placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single field of view is used for imaging the mounting position, then the device structure is simple, but the imaging reliability deteriorates when shields obstruct the field of view
Solution Approach 1:
The imaging unit is divided into multiple imaging sections, each capturing a different field of view (first field of view and second field of view). This segmentation allows the system to overcome shielding obstructions by selecting an unobstructed field of view for mounting determination, thereby improving reliability without requiring a completely complex new imaging architecture.
2Reliability
If multiple fields of view are used for imaging, then the imaging reliability improves by overcoming shield obstructions, but the device complexity increases
Solution Approach 1:
The system dynamically selects the appropriate field of view (first or second) based on the imaging results. The controller determines which field of view provides clear visibility of the mounting position and uses that for determination. This dynamic selection mechanism allows the system to adapt to different shielding conditions without requiring both fields of view to be simultaneously optimal, balancing reliability improvement with controlled complexity.
3Device complexity
If imaging is performed from a fixed direction, then the imaging system is simple, but the ability to overcome shield obstructions is limited
Solution Approach 1:
The first and second fields of view are configured with asymmetric imaging directions relative to the mounting position. The first imaging section images from a first direction and the second imaging section images from a second direction that is different from the first direction. This asymmetric configuration allows the system to adapt to shields positioned at different locations, improving versatility in handling various shielding conditions while maintaining a relatively simple imaging system.
Data Source
AI summary
A component mounting device includes a mounting head that mounts a component at a mounting position on a substrate, an imaging unit capable of imaging the mounting position from a plurality of fields of view, imaging directions of which are different from each other, and a controller that selects a success or failure determination field of view used for success or failure determination of whether or not the component has been mounted at the mounting position from the plurality of fields of view according to a state of a shield around the mounting position.