Image Inspection Illumination Cooling for Uniform Airflow
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Solution Overview
Problem
Existing image inspection devices face challenges in uniformly cooling the illumination part and suppressing the attachment of foreign matter, such as paper dust, which affects the reading performance.
Innovation Solution
An image inspection device with a cooling mechanism that includes a single blowing part and guides air through first and second guides to uniformly distribute air over the entire illumination area, preventing foreign matter accumulation and ensuring uniform light intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single blowing part is used to cool the illumination part, then the device complexity is reduced, but it becomes difficult to achieve uniform air distribution across the entire illumination area
Solution Approach 1:
The cooling system is segmented into multiple functional components: a single blowing part, a first guide for distributing air in the width direction, and a second guide for distributing air in the transport direction. This segmentation allows one blowing part to achieve uniform cooling across the entire illumination area by dividing the air distribution function across multiple guide structures.
Solution Approach 2:
The first and second guides act as intermediary structures that transfer and distribute air from the single blowing part to the illumination part. The first guide distributes air along the width direction, and the second guide distributes air along the transport direction, together enabling uniform air distribution across the entire illumination area from a single source.
2Temperature
If cooling air is blown directly onto the illumination part, then cooling efficiency is improved, but foreign matter attachment to the illumination part and reading part increases
Solution Approach 1:
The first and second guides serve as intermediary structures that channel cooling air along specific paths (width direction and transport direction respectively) before it reaches the illumination part. This indirect routing allows cooling to occur while reducing direct airflow that would carry foreign matter onto the illumination and reading parts.
Solution Approach 2:
The air distribution is optimized locally by using the first guide to distribute air along the width direction and the second guide to distribute air along the transport direction. This creates localized cooling zones that maintain uniform temperature without creating strong direct airflow that would deposit foreign matter on sensitive components.
3Manufacturing precision
If multiple blowing parts are used to achieve uniform air distribution, then the uniformity of cooling is improved, but the device complexity and cost increase
Solution Approach 1:
The air distribution function is segmented into multiple guides rather than using multiple blowing parts. The first guide handles distribution in the width direction and the second guide handles distribution in the transport direction, achieving uniform cooling with a single blowing part and reducing overall system complexity.
Solution Approach 2:
The first and second guides serve multiple functions: they channel air flow, distribute air uniformly across different directions, and protect the illumination part from direct airflow carrying foreign matter. This multi-functionality replaces the need for multiple blowing parts while maintaining uniform cooling.
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
The solution effectively cools the entire illumination area uniformly, reducing the risk of foreign matter attachment and maintaining consistent light intensity, thereby enhancing reading performance.
Implementation Method 1
one blowing part provided on one side in the width direction of the medium and configured to suck and blow outside air
Implementation Method 2
a first guide extending in the width direction of the medium and configured to guide the air blown from the blowing part to a flow path extending in the width direction of the medium; and a second guide configured to guide the air, guided by the first guide, in the medium transport direction to a space where the illumination part is disposed, and distribute the air such that an air volume is uniform over the entire area of the illumination part
Data Source
AI summary
An image inspection device includes: an illumination part extending in a width direction of a medium, which intersects a medium transport direction, so as to face a medium transport path, and configured to radiate light on an image formed on a surface of the medium; a reading part configured to read reflected light from the image as image inspection information; and a cooling part configured to cool an entire area of the illumination part in the width direction of the medium. The cooling part includes one blowing part provided on one side in the width direction of the medium and configured to suck and blow outside air, a first guide extending in the width direction of the medium and configured to guide the air blown from the blowing part to a flow path extending in the width direction of the medium, and a second guide configured to guide the air, guided by the first guide, in the medium transport direction to a space where the illumination part is disposed, and distribute the air such that an air volume is uniform over the entire area of the illumination part in the width direction of the medium.