Multi-Angle Lighting System for Leather Defect Detection
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Solution Overview
Problem
Existing inspection apparatuses for fabrics, particularly leather, struggle with managing lighting effectively to detect defects due to varying needs during different operations and material types, necessitating a versatile and efficient lighting control system.
Innovation Solution
The apparatus incorporates multiple light sources from different directions, including grazing and overhead lights, adjustable in intensity and color temperature, controlled by a unit that selects optimal lighting modes based on operator needs, allowing for precise defect detection and adaptable lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light sources from different directions are added to improve defect detection capability, then the lighting versatility and defect detection efficiency are improved, but the device complexity and cost increase
Solution Approach 1:
The lighting system is segmented into multiple independent light sources positioned at different locations and angles around the work plane. Each light source can be individually controlled to provide specific lighting functions (grazing light, overhead light, side light), allowing the system to handle diverse inspection requirements through selective activation of segments rather than requiring a single complex lighting unit
Solution Approach 2:
The lighting system is designed with multi-functional light sources that can serve multiple purposes. The same physical light source can provide different lighting effects (grazing, overhead, side illumination) depending on its position and control settings, enabling a single lighting system to handle various material types, defect types, and inspection requirements universally
2Measurement precision
If multiple light sources from different directions are added to improve defect detection capability, then the defect detection precision is improved, but the use of energy increases
Solution Approach 1:
The lighting system implements dynamic control where light sources can be individually activated or deactivated based on the specific inspection requirements. The control unit dynamically adjusts which light sources are active, their intensity levels, and their operational timing, ensuring that only the necessary lights are energized during each inspection task rather than all lights operating continuously at full power
Solution Approach 2:
The system changes operational parameters of light sources including intensity, color temperature, and activation state based on the inspection needs. By adjusting these parameters dynamically, the system achieves optimal defect detection precision for different material types and defect characteristics while minimizing energy consumption by avoiding unnecessary high-intensity or multi-directional lighting when not required
3Ease of operation
If lighting modes are made adjustable to meet different operation needs, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The control unit is pre-programmed with multiple lighting modes and configurations optimized for different inspection scenarios (e.g., leather inspection, fabric inspection, specific defect types). These pre-configured modes are stored in the control system's memory, allowing operators to simply select from predefined options rather than manually adjusting multiple light source parameters, thereby simplifying operation while maintaining the capability for complex lighting arrangements
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 solution enables efficient and versatile lighting management, facilitating the detection of various defects in leather and other materials by adjusting light settings automatically or manually, ensuring optimal inspection conditions.
Implementation Method 1
a lighting system comprising at least one first set of light sources arranged and configured to illuminate the work-plane from an elevated position with respect to said work-plane, according to a first incidence angle with said work-plane, and a second set of light sources arranged and configured to emit grazing light on the work-plane, according to a second incidence angle with said work-plane
Data Source
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AI summary
It is herein described an apparatus (1) for the inspection and/or processing of a material, in particular leather, the apparatus (1) comprising a work-plane (2) adapted to provide a support surface for the material, said work-plane (2) having at least one first pair of opposite sides (2a) and at least one second pair of opposite sides (2b), a control unit (C) adapted to manage the apparatus (1), and a lighting system (15) comprising at least one first set of light sources (15') which are arranged and configured to illuminate the work-plane (2) from an elevated position with respect to said work-plane (2), according to a first incidence angle with said work-plane (2), and a second set of light sources (15") arranged and configured to emit grazing light to the work-plane (2), according to a second incidence angle with said work-plane (2) said second incidence angle being smaller than the first incidence angle. The second set of light sources (15") comprises a first plurality of light sources (15"a) arranged at at least one of the two opposite sides (2a) of the first pair of opposite sides, and a second plurality of light sources (15"b) arranged at at least one of the two opposite sides (2b) of the second pair of opposite sides.