Wireless Tag Verification in Sheet Conveyance Image Forming
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Solution Overview
Problem
Existing image forming apparatuses incorrectly process wireless tags that are not intended for processing, leading to erroneous determinations of normal writing or reading operations.
Innovation Solution
The apparatus includes a control unit that performs two separate reading processes on wireless-tagged sheets in different conveyance paths, and determines whether the apparatus includes a control unit that performs a first conveyance on the wireless tag that performs a first reading process on the sheet in a first conveyance path and a second reading process on the same sheet in a second conveyance path, using different wireless power levels, to accurately distinguish between normally processed and not normally processed sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single reading process is performed on wireless tags, then the processing speed is fast, but the accuracy of determining normal processing is low
Solution Approach 1:
The patent divides the reading process into multiple separate reading operations (first reading process and second reading process) performed at different stages. The first reading is done after writing to verify initial correctness, and the second reading is done after conveyance to confirm final state. This segmentation allows accurate verification without requiring all readings to happen simultaneously, thus maintaining processing speed while improving accuracy.
Solution Approach 2:
The patent performs a preliminary reading process immediately after the writing operation to verify that data was correctly written to the wireless tag before the sheet is discharged. This preliminary check prevents erroneous discharge of sheets with incorrectly written tags, improving accuracy without significantly delaying the overall processing timeline.
2Reliability
If multiple reading processes are performed to verify writing accuracy, then the determination accuracy is improved, but the processing time increases
Solution Approach 1:
The patent implements periodic reading operations at different stages of the sheet processing cycle. The first reading occurs after writing, and the second reading occurs after conveyance. By distributing readings periodically rather than performing them all at once, the system maintains reliable verification while minimizing time loss, as readings are interleaved with other processing operations.
3Measurement precision
If wireless tags are read from sheets in different locations, then the accuracy of distinguishing processed vs unprocessed sheets is improved, but the complexity of the reading system increases
Solution Approach 1:
The patent uses a single wireless tag reading unit that performs multiple functions: it conducts the first reading process after writing, the second reading process after conveyance, and can read tags from sheets in various locations (conveyance path, discharge destination, accumulation location). This multi-functionality eliminates the need for separate reading units at different locations, improving accuracy while controlling system complexity.
Data Source
AI summary
An image forming apparatus includes a first conveyance driving unit, a second conveyance driving unit, an image forming unit, a tag communication unit, and a control unit. The image forming unit forms the image with respect to the sheet conveyed through the first conveyance path or the second conveyance path. The tag communication unit writes data or reads data to a wireless tag of the sheet located in the first conveyance path or the second conveyance path. The control unit reads the data from the wireless tag of the sheet after writing the data to the wireless tag, and determines whether or not the data was normally written to the wireless tag based on the read data.