Sheet Recognition Unit for Multi-Type Shape Detection
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Solution Overview
Problem
Existing sheet recognition units are limited by detecting sheet shapes using only one preset method, leading to low accuracy when handling multiple types of sheets, which affects determination processing such as size and defect detection.
Innovation Solution
A sheet recognition unit that acquires multiple types of images of a sheet and generates corresponding shape information, allowing for selective shape determination processing based on the selected shape information, tailored to the specific type of sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sheet recognition unit uses only one preset method to detect sheet shapes, then the device complexity is low, but the measurement precision decreases when handling multiple types of sheets
Solution Approach 1:
The sheet recognition unit dynamically switches between different shape detection methods (transmission image-based method and reflection image-based method) depending on the sheet type. The control unit selects the appropriate method based on sheet characteristics, allowing the system to adapt its detection strategy rather than using a fixed single method, thereby maintaining high accuracy across diverse sheet types without requiring multiple permanent detection mechanisms
Solution Approach 2:
The system changes the detection parameters by selecting different image types (transmission vs. reflection) and different detection algorithms based on the sheet type. For transparent sheets, the system uses transmission images with specific processing; for opaque sheets, it uses reflection images. This parameter switching allows one recognition unit to achieve multiple detection capabilities without physical reconfiguration
2Measurement precision
If a sheet recognition unit uses multiple detection methods for different sheet types, then the measurement precision increases, but the device complexity increases
Solution Approach 1:
A single sheet recognition unit is designed to perform multiple functions by integrating both transmission image acquisition and reflection image acquisition capabilities. The control unit manages both detection methods within one unified system, allowing the same device to accurately detect shapes of both transparent and opaque sheets without requiring separate dedicated devices for each sheet type
Solution Approach 2:
The control unit preliminarily identifies the sheet type (transparent or opaque) before initiating shape detection. Based on this preliminary classification, it pre-selects the appropriate detection method and parameters, ensuring that the correct detection strategy is already in place before processing begins, thereby avoiding the need to maintain all possible detection configurations simultaneously
3Adaptability or versatility
If the sheet recognition unit selects shape information based on sheet type, then the adaptability increases, but the processing time increases
Solution Approach 1:
The control unit performs preliminary identification of the sheet type (transparent or opaque) before shape detection begins. This preliminary classification allows the system to pre-determine which detection method and shape information selection strategy to use, avoiding time-consuming runtime decisions and ensuring that the appropriate processing path is already prepared, thus reducing overall processing time while maintaining high adaptability
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 significantly increases the accuracy of determination processing related to sheet shapes, improving the detection of sizes and defects across various types of sheets.
Implementation Method 1
A transparent portion transmits light emitted from the optical sensor
Data Source
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AI summary
A sheet recognition unit of the present disclosure includes: an image acquisition unit configured to acquire a plurality of types of images of the sheet; and a control unit configured: to generate a plurality of types of shape information based on the plurality of types of images, and to select at least one type of shape information from among the plurality of types of shape information so as to execute selective shape determination processing which is determination processing related to a shape of the sheet based on the selected at least one type of shape information.