Image Reading Device White Reference Data Acquisition Control
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Solution Overview
Problem
Conventional image reading devices using the double side simultaneous reading method face issues with erroneous light source detection due to the cover member opening, leading to incorrect white reference data acquisition and potential external disturbance errors.
Innovation Solution
An image reading device with a rotatable white reference roller and a control system that performs multiple checks to ensure the cover member is closed before acquiring white reference data, using a sensor to verify the data meets predetermined conditions across various reading modes, ensuring accurate initial white reference data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the reading module is arranged at where the cover member opens and closes to consider space and cleaning convenience, then the device structure is optimized for maintenance and space utilization, but erroneous detection occurs when the cover member is open causing incorrect white reference data acquisition
Solution Approach 1:
The control portion performs open/closed state checking before acquiring white reference data to ensure the cover member is in the closed state. This preliminary verification prevents erroneous detection by confirming proper setup conditions before measurement, resolving the reliability issue while maintaining the space-optimized arrangement.
Solution Approach 2:
The system implements feedback by checking the open/closed state of the cover member and the quality of acquired white reference data. If the cover is open or data quality is insufficient, the system detects this and can request re-acquisition, creating a feedback loop that ensures accurate data collection despite the compact arrangement.
2Productivity
If white reference data is acquired with the cover member open to simplify the acquisition process, then the data acquisition is faster and simpler, but external disturbance light is received causing measurement errors
Solution Approach 1:
The control portion checks the cover member's closed state before initiating white reference data acquisition. This preliminary action ensures that the measurement environment is proper (cover closed to block external light) before starting the acquisition process, preventing measurement errors while maintaining efficient operation.
Solution Approach 2:
The system cushions against potential measurement errors by verifying the cover is closed and checking data quality after acquisition. This beforehand protection mechanism prevents external light interference from corrupting the white reference data, ensuring measurement precision without significantly impacting acquisition speed.
3Reliability
If multiple checks and verification steps are added to ensure accurate white reference data acquisition, then the reliability and accuracy improve, but the processing time and system complexity increase
Solution Approach 1:
The control portion performs necessary checks (cover closed state verification) before white reference data acquisition. This preliminary action ensures proper conditions are met before measurement, improving reliability without requiring complex continuous monitoring systems throughout the entire operation.
Solution Approach 2:
The system uses feedback mechanisms to check data quality after acquisition and verify cover state. This targeted feedback approach provides necessary verification without requiring overly complex continuous monitoring, balancing reliability improvement with acceptable system complexity.
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
Prevents erroneous detection and ensures reliable white reference data acquisition by confirming the cover member's closed state and verifying data quality, reducing the risk of external light interference and improving the accuracy of light source status detection.
Implementation Method 1
a light source, and a sensor which reads, as an image light, reflected light of light shone from the light source
Implementation Method 2
reflected light of light shone from the light source to the conveyed document
Implementation Method 3
a sensor which reads, as an image light, reflected light of light shone from the light source
Data Source
AI summary
An image reading device includes a document conveying device, a first reading module and a control portion. When initial white reference data, that is, an initial value of white reference data, is acquired, the control portion performs white reference data acquisition processing in a plurality of reading modes sequentially, and if it is judged that the white reference data meets a predetermined condition through data judging processing in all the plurality of reading modes, the acquired initial white reference data is set as usable, and if it is judged that the white reference data does not meet the predetermined condition through data judging processing in at least one of the plurality of reading modes, the acquired initial white reference data is set as unusable.