Optical Sensor Switching for Translucent Sheet Detection
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Solution Overview
Problem
Conventional discharging apparatuses using transmission-type optical sensors fail to detect the position of translucent films with high transparency, leading to errors and inability to perform discharge processing functions, limiting compatibility with various media types in printing systems like POD.
Innovation Solution
Implementing a mechanism that controls discharge processing functions based on sheet detection performance by inputting sheet type information, using both reflection-type and transmission-type sensors to determine transparency levels and enable or disable position detection and processing accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission-type optical sensors are used for sheet position detection, then detection accuracy is improved, but translucent films with high transparency cannot be detected
Solution Approach 1:
The patent dynamically switches between transmission-type and reflection-type optical sensors based on the detected sheet type. When a translucent film is detected, the system switches to reflection-type sensor operation, enabling adaptability to different media while maintaining detection capability through dynamic configuration changes.
Solution Approach 2:
The patent changes the operational parameters of the optical sensor system by switching between transmission and reflection modes. This parameter change allows the same sensor infrastructure to handle both opaque and translucent materials effectively, resolving the contradiction between detection accuracy and material compatibility.
2Reliability
If discharge processing functions are disabled for translucent films, then detection errors are prevented, but processing capability is reduced
Solution Approach 1:
The system dynamically enables or disables discharge processing functions based on the detected sheet type. For translucent films detected by reflection-type sensors, the system enables processing functions that were previously disabled, thereby restoring productivity while maintaining reliability through condition-based control.
Solution Approach 2:
The patent implements feedback control where the detection result (sheet type identification) feeds back to the discharge processing control unit, which then adjusts the processing capability accordingly. This feedback mechanism ensures that processing is enabled only when appropriate detection conditions are met, balancing reliability and productivity.
3Adaptability or versatility
If multiple sensor types are implemented, then compatibility with various sheet types is improved, but device complexity increases
Solution Approach 1:
The patent makes the optical sensor system universal by enabling it to perform both transmission-type and reflection-type detection functions. Rather than implementing completely separate sensor systems, the invention allows a single sensor infrastructure to serve multiple detection modes, reducing overall system complexity while maintaining versatility.
Solution Approach 2:
The system uses dynamic configuration to switch between transmission and reflection modes based on detected sheet properties. This dynamic approach allows the system to adapt to various media types without requiring permanent, complex multi-sensor installations, thereby managing device complexity while improving 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
Enables accurate detection and processing of translucent films with high transparency, preventing errors and ensuring compatibility with diverse media types by adjusting sensor settings and processing controls based on detected transparency levels.
Implementation Method 1
an optical sensor provided on the conveyance path, the optical sensor detecting an end of a sheet being conveyed by the conveying roller
Data Source
AI summary
The present printing system obtains a transparency of a sheet to be subjected to printing, and based on the obtained transparency of the sheet, restricts execution of post-processing by a discharging portion.