Variable-Focus Inspection Routing for Constrained Imaging Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing appearance inspection systems face difficulties in setting an optimal route for the imaging device relative to the target, especially when the degree of freedom of the imaging device's position is limited, leading to challenges in satisfying preset requirements for sequential imaging.
Innovation Solution
An appearance inspection system with a decision part, selection part, and lens control part that determines and adjusts the relative positions of the imaging device with a variable focus lens to create a designation route, allowing for more flexible and efficient imaging by selecting from multiple relative position candidates and controlling the focus position accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the degree of freedom of the imaging device position is restricted, then the imaging device can be positioned stably, but it becomes difficult to set a route satisfying preset requirements
Solution Approach 1:
The patent applies dynamics by making the focus position adjustable rather than fixed. The lens module's focus position can be dynamically changed according to the imaging device's position along the route, allowing the system to adapt to position restrictions while maintaining imaging quality. This resolves the contradiction by enabling route satisfaction through dynamic focus adjustment rather than requiring fixed position freedom.
Solution Approach 2:
The patent changes the focus position parameter of the lens module based on the imaging device's position. By adjusting this parameter dynamically, the system can maintain proper focus even when the imaging device follows a restricted route, thereby satisfying preset requirements without needing high positional degree of freedom.
2Device complexity
If the focus position is fixed, then the lens module is simpler, but it cannot maintain focus when the distance to the target varies along the route
Solution Approach 1:
The lens module incorporates a dynamically adjustable focus position rather than a fixed one. This allows the focus to be changed in response to varying distances to the target along the imaging route, maintaining focus consistency while accepting the added complexity of adjustable focus mechanisms.
3Manufacturing precision
If multiple relative position candidates are evaluated, then a satisfactory route can be found, but the computation time increases
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing multiple relative position candidates before route determination. This allows the system to quickly reference and evaluate pre-computed options during actual operation, reducing real-time computation time while maintaining route precision through thorough preliminary analysis.
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 approach enables the system to easily set a route that satisfies preset requirements, ensuring consistent image quality and efficient inspection by maintaining a pre-decided range and curvature, even when the distance between the imaging device and target varies.
Implementation Method 1
a lens module (12) with a variable focus position
Data Source
AI summary
An appearance inspection system enabling a route to be easily set when a target is imaged while causing a relative position of an imaging device with respect to the target to be different is provided. A decision part decides a plurality of relative position candidates of the imaging device with respect to the target at which focus of a lens module is possible on the inspection target position with regard to each of a plurality of the inspection target positions on the target. A selection part selects relative positions one by one from corresponding plurality of relative position candidates for each of the plurality of inspection target positions and selects a route candidate satisfying a preset requirement from a plurality of route candidates generated by sequentially connecting the plurality of selected relative positions as a designation route.