Angled Barcode Reader Layout for Curved Test Sample Surfaces
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Solution Overview
Problem
Conventional barcode readers struggle with low success rates when reading barcodes on test samples due to regular reflection light interference, especially when the barcode is affixed along the longitudinal direction of a curved surface, and existing techniques fail to effectively avoid this issue.
Innovation Solution
The use of self-luminous barcode readers arranged at angles greater than 0° in both horizontal and vertical directions relative to the normal vectors of the test sample surface, combined with test sample holding ribs to stabilize the sample and prevent obstructive reflections, ensures comprehensive coverage of the barcode surface without parallel optical axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is irradiated from the front onto the barcode, then the barcode can be illuminated, but strong regular reflection light returns to the light receiving part reducing reading success rate
Solution Approach 1:
The patent applies dimensionality change by arranging multiple barcode readers not only in the horizontal direction but also in the vertical direction. The optical axes are inclined at angles greater than 0° in both horizontal and vertical directions relative to the normal vectors of the test sample surface. This three-dimensional arrangement allows the system to capture barcode images from multiple angles, avoiding direct reflection paths while ensuring complete coverage of the curved barcode surface.
2Object-affected harmful factors
If the test sample is moved to avoid regular reflection area, then reflection can be reduced, but the essential problem of reading curved surface barcodes is not solved
Solution Approach 1:
The patent segments the barcode reading function into multiple independent readers positioned at different locations. Instead of relying on a single reader that would require moving the sample, the system divides the reading task among several readers with optical axes oriented at different angles. This segmentation allows simultaneous coverage of the entire curved barcode surface without requiring sample movement, and the system can select the best reading result from multiple attempts.
3Area of stationary object
If multiple barcode readers are arranged to cover the entire barcode surface, then complete coverage is achieved, but the complexity of the system increases
Solution Approach 1:
The patent employs asymmetric arrangement of barcode readers with optical axes inclined at specific angles greater than 0° in both horizontal and vertical directions. This asymmetric positioning is optimized to match the curvature and orientation of the test sample surface, ensuring that each reader captures a specific portion of the barcode effectively. The asymmetric design allows complete surface coverage while minimizing the number of readers needed compared to symmetric 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 configuration significantly increases the success rate of barcode reading by avoiding regular reflection and ensuring stable, efficient scanning of the entire barcode surface, even on curved surfaces, by using self-luminous readers and strategically positioned holding ribs.
Implementation Method 1
self-luminous barcode readers, in which the self-luminous barcode readers are arranged so that irradiating light emitted from the barcode readers entirely covers a surface provided with the barcode
Implementation Method 2
A conventional barcode reading system is configured to irradiate the barcode with light from the front, and has a problem in that strong regular reflection light returns to the light receiving part to thereby reduce the success rate of reading
Data Source
AI summary
Self-luminous barcode readers 102A, 102B, 102C, 102D, 102E, 102F are provided in an arrangement such that irradiating light emitted from the barcode readers 102A, 102B, 102C, 102D, 102E, 102F entirely covers a surface provided with a barcode 107 and optical axes 104A, 104B, 104C, 104D, 104E, 104F of the irradiating light are inclined horizontally at an angle greater than 0° in absolute value and vertically at an angle greater than 0° in absolute value from normal vectors 105A, 105B, 105C of a test surface of a test sample 101 provided with the barcode 107. This arrangement provides a test sample reading device and a test sample reading method with which the success rate of barcode reading can be raised compared to the past.