Lead Position Recognition with Dynamic Tolerance Modes
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Solution Overview
Problem
Conventional component mounting devices fail to accurately detect the position of leads with solder applied, as the larger image region complicates correct detection.
Innovation Solution
A component mounting device with an imaging system and processing section that performs selective recognition processing, including region determination within a tolerance range and without, to accurately identify lead positions, even when covered with viscous fluids like solder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If region determination with tolerance range is performed for lead position detection, then measurement precision is improved for clean leads, but detection reliability deteriorates when leads are covered with solder or plating
Solution Approach 1:
The system dynamically switches between two recognition processing modes based on the detection situation. When leads are clean, first recognition processing with region determination and tolerance range is used for high precision. When leads are covered with solder or plating, second recognition processing without region determination is used to ensure reliable detection. This dynamic adaptation resolves the contradiction between precision and reliability.
Solution Approach 2:
The system changes the processing parameters by selectively applying or removing the region determination step with tolerance range checking. For clean leads, the stricter parameter set (with tolerance range) is applied. For solder-covered leads, the parameter set without region determination is used, allowing the detection to accommodate the larger image region caused by solder coverage.
2Adaptability or versatility
If second recognition processing without region determination is used, then detection flexibility is improved for solder-covered leads, but measurement precision deteriorates due to larger image regions
Solution Approach 1:
The system dynamically selects the appropriate recognition processing mode based on whether leads are covered with solder or plating. Second recognition processing without region determination is activated when adaptability is needed for solder-covered leads, while first recognition processing with region determination is used when precision is the priority for clean leads.
3Device complexity
If conventional lead detection method is used, then device complexity is kept simple, but detection reliability deteriorates when leads are covered with viscous fluids
Solution Approach 1:
The detection system is segmented into two distinct recognition processing pathways: first recognition processing with region determination for clean leads, and second recognition processing without region determination for solder-covered leads. This segmentation allows the system to maintain simple operation for each pathway while achieving high reliability across both scenarios through selective application.
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 accurate lead position recognition, preventing incorrect detection and allowing for flexible operation modes to suit various mounting scenarios, including those with solder or plating coverage.
Implementation Method 1
shines light from the sides of the leads, images the component from below
Data Source
AI summary
A component mounting device capable of selectively performing a tolerance check mode that recognizes a position of a lead after determining whether the size of a lead region is within a tolerance range, and a non-tolerance check mode that recognizes a position of the lead without performing determination of whether the size of the lead region is within the tolerance range. Therefore, even in cases in which it is difficult to set a tolerance range due to the tip of the lead being covered with a viscous fluid such as solder or plating, the position of the lead is appropriately recognized.